JPWO2018025880A1 - Twin-rotating scroll compressor - Google Patents

Abstract

Provided is a dual-rotating scroll compressor capable of inexpensively manufacturing a drive-side scroll member provided with a spiral wall between opposed end plates. The drive side scroll member (70) has a first drive side end plate (71a) and a first drive side wall (71b), and a first drive side scroll portion (71) driven by the motor (5) A second drive side scroll portion (72) having a second drive side end plate (72a) and a second drive side wall (72b), a first drive side wall (71b) and a second drive side wall (72b) And a bolt (31) fixed in a state where the tips in the direction of the rotational axis face each other face each other.

Description

  The present invention relates to a dual-rotation scroll compressor.

  2. Description of the Related Art A twin-rotating scroll compressor is known in the prior art (see Patent Document 1). This includes a drive-side scroll and a driven-side scroll that rotates in synchronization with the drive-side scroll, and the driven shaft that supports the rotation of the driven-side scroll with respect to the drive shaft that rotates the drive-side scroll The drive shaft and the driven shaft are rotated at the same angular velocity in the same direction.

Patent No. 5443132 JP, 2014-13044, A

  The double-rotating scroll compressor of Patent Document 1 includes a drive-side scroll member provided with a spiral wall between opposed end plates, and a driven-side scroll provided between the end plates of the drive-side scroll member. And a member. In order to realize such a configuration, in the same document, no end plate is provided on the outer peripheral portion of the driven scroll member, and the spiral wall of the drive scroll member is passed through this position to drive the scroll member. The driven scroll member is sandwiched and fixed by the end plates on both sides of (see FIG. 3 of Patent Document 1). At this time, the tip end of the spiral wall of the drive-side scroll member is inserted and positioned in the groove formed on the end plate, and then fastened with a screw. Therefore, the height of the spiral wall needs to be increased by the amount of insertion into the groove of the wall, and the height of the wall will be larger than the wall height originally required. As the height of the spiral wall increases, processing by an end mill or the like is necessary for the increase in the height, and the cost increases. Moreover, since it is necessary to process a groove in an end plate, a process process is needed by that much and a cost increases further.

  The present invention has been made in view of such circumstances, and it is possible to inexpensively manufacture a drive-side scroll member provided with a spiral wall between opposing end plates. Intended to be provided.

  Moreover, since the scroll part of a scroll type compressor needs cutting of the shape which combined the complicated curve, improvement of workability is desired.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a double-rotating scroll compressor capable of reducing the cost by improving the processability of the scroll portion.

  Moreover, in the double rotation type scroll compressor described in the said patent document 1, two scroll members which faced each other are fixed mutually, and it is set as the drive side scroll. Although the material of the scroll members fixed to each other is not specified at all, the inventors of the present invention examined that when the scroll members are made of different materials, the thermal expansion difference occurs when the temperature change occurs. It has been found that deformation may occur, which may cause stress increase and the performance of the compressor. In addition, at the fixed contact portions with each other, there is a possibility that electrolytic corrosion may occur due to the reaction with water due to the difference in ionization tendency.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a double rotation scroll compressor capable of suppressing an increase in stress due to temperature change and a decrease in compression performance.

  Further, in the double-rotating scroll compressor described in Patent Document 1, compression chambers are formed on both sides of the end plate of the driven scroll member with the drive scroll member. However, a pressure difference occurs in the compression chambers on both sides due to manufacturing dimensional variations and the like, and there is a possibility that the discharge may be inhibited when the compression chambers on both sides merge before the discharge of the working fluid. In addition, there is a possibility that a thrust load may be generated on the scroll member due to the pressure difference between the compression chambers on both sides.

  The present invention has been made in view of such circumstances, and provides a double-rotating scroll compressor capable of reducing the pressure difference between compression chambers formed on both sides of the end plate of the driven scroll member. The purpose is to

  Further, as a scroll type compressor, there is known a fixed orbiting scroll type compressor in which one is a fixed scroll fixed to the housing side and the other is a orbiting scroll performing a revolving orbiting motion around the fixed scroll. Then, surface treatment is performed to prevent burn-in between the fixed scroll and the orbiting scroll (see Patent Document 2 above).

  However, in the case where surface treatment is applied to the scroll members of the dual-rotating scroll compressor to prevent burn-in, no study has been made up to which region the surface treatment should be applied. In particular, if the surface treatment is performed to unnecessary portions, the cost will increase.

  The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a double-rotating scroll compressor capable of suppressing the cost of surface treatment.

  In order to solve the above-mentioned subject, a double rotation scroll type compressor of the present invention adopts the following means.

  According to one aspect of the present invention, there is provided a drive side scroll member having a spiral drive side wall body which is rotationally driven by a drive portion and disposed on a drive side end plate; A driven scroll member having a corresponding spiral driven side wall disposed on a driven end plate, the driven side wall being engaged with the drive side wall to form a compression space, and the drive side scroll The drive-side scroll member includes a synchronous drive mechanism for transmitting a driving force from the drive-side scroll member to the driven-side scroll member such that the member and the driven-side scroll member rotate at the same angular velocity in the same direction. A first drive side scroll portion having a first drive side end plate and a first drive side wall body, and driven by the drive portion; a second drive side end plate; and a second drive side wall body The driven side scroll, and a wall fixing portion fixed in a state in which the tips in the rotational axis direction of the first driving side wall and the second driving side wall face each other, and the driven side scroll A member is provided on one side of the driven end plate, and is provided on a first driven side wall that engages with the first drive side wall, and on the other side of the driven end plate, and that engages with the second drive side wall And a second driven side wall body.

A compression space is formed by the drive side wall disposed on the drive side end plate of the drive side scroll member and the driven side wall of the driven side scroll member being engaged with each other. The drive-side scroll member is rotationally driven by the drive unit, and the driving force transmitted to the drive-side scroll member is transmitted to the driven-side scroll member via the synchronous drive mechanism. Thus, the driven scroll member rotates and performs rotational motion at the same angular velocity in the same direction with respect to the drive scroll member. Thus, a dual-rotation scroll compressor is provided in which both the drive-side scroll member and the driven-side scroll member rotate.
The drive side scroll member is constituted by the first drive side wall body and the second drive side wall body, and the height direction of the wall body of the drive side scroll member is divided. Thereby, the processing height at the time of processing a wall can be reduced, and it becomes possible to process with high precision and at high speed.

  Furthermore, in the dual-rotating scroll compressor according to one aspect of the present invention, the wall fixing portion may be a key groove portion provided at each of the tip of the first drive sidewall and the tip of the second drive sidewall. And a key member inserted into the key groove.

  A wall fixing portion is provided to fix the tips of the two drive side walls. The wall fixing portion is provided with key groove portions respectively provided at the tip of the first drive side wall and the tip of the second drive side wall, and a key member inserted into the key groove. Since the key groove is provided along the tip of the spiraled wall, positioning can be performed not only in one direction but also in two directions, and the walls can be accurately combined.

  Furthermore, in the dual-rotating scroll compressor according to one aspect of the present invention, the wall fixing portion is a groove portion provided in any one of the tip of the first drive sidewall and the tip of the second drive sidewall. And a projection provided at the other end of the second drive side wall and the other end of the first drive side wall and inserted into the groove.

  A wall fixing portion is provided to fix the tips of the two drive side walls. The wall fixing portion is provided on the other of the groove provided at one of the tip of the first drive sidewall and the tip of the second drive sidewall and the other of the tip of the second drive sidewall and the tip of the first drive sidewall. And a projection which is inserted into the groove. Since the grooves and the projections are provided along the tip of the spirally wound wall, positioning can be performed not only in one direction but also in two directions, and the walls can be accurately combined.

  The dual-rotating scroll compressor according to one aspect of the present invention has a plurality of spiral drive side walls which are rotationally driven by a drive unit and installed at predetermined angular intervals around the center of the drive side plate. A drive-side scroll member and a number of spiral driven side walls disposed at predetermined angular intervals around the center of the driven-side end plate and corresponding to each of the drive side walls. The driven side scroll member forming a compression space by meshing with the corresponding drive side wall body, and the drive side scroll member and the driven side scroll member rotate at the same angular velocity in the same direction And a synchronous drive mechanism for transmitting a driving force from the drive-side scroll member to the driven-side scroll member, the drive-side scroll member including a first drive-side end plate and a first drive sidewall member. A second drive side scroll portion having a first drive side scroll portion driven by the drive portion, a second drive side end plate and a second drive side wall body, the first drive side wall body, and the first drive side wall body The driven scroll member includes a first driven side end plate and one of the first driven side end plates. Provided on a side surface of the first driven side scroll portion having a first driven side wall body provided on the side surface and engaged with the first driving side wall body, a second driven side end plate, and one side surface of the second driven side end plate; And a second driven side scroll portion having a second driven side wall engaged with a second driving side wall, and the first driven side end plate and the second driven side end plate are overlapped with each other and fixed It is done.

Each of the drive side walls disposed at predetermined angular intervals around the center of the end plate of the drive side scroll member is engaged with the corresponding driven side wall of the driven side scroll member. As a result, a scroll compressor having a plurality of pairs of one drive side wall and one driven side wall is provided. The drive-side scroll member is rotationally driven by the drive unit, and the driving force transmitted to the drive-side scroll member is transmitted to the driven-side scroll member via the synchronous drive mechanism. Thus, the driven scroll member rotates and performs rotational motion at the same angular velocity in the same direction with respect to the drive scroll member. Thus, a dual-rotation scroll compressor is provided in which both the drive-side scroll member and the driven-side scroll member rotate.
The compression chamber is formed by the engagement of the first drive sidewall and the first driven sidewall, and the compression chamber is formed by the engagement of the second drive sidewall and the second driven sidewall. The compression chamber of the At this time, the first drive side scroll portion and the second drive side scroll portion are separate members. As a result, the processability of the drive side scroll member can be increased and the cost can be reduced.
Further, with respect to the driven scroll member, the first driven end plate and the second driven end plate are not shared by one member, and the other of the first driven end plate and the second driven end plate. Since the side surfaces are overlapped and fixed, the first driven scroll portion and the second driven scroll portion can be separate members. As a result, the processability of the driven scroll member can be improved, and the cost can be reduced.

  Further, in the dual-rotating scroll compressor according to one aspect of the present invention, a plurality of spiral drive side walls which are rotationally driven by the drive unit and installed at predetermined angular intervals around the center of the drive side end plate And a number of spiral driven side walls which are disposed at predetermined angular intervals around the center of the driven side end plate and correspond to each of the driving side walls. The driven side scroll member forming a compression space by meshing with each corresponding drive side wall, and the drive side scroll member and the driven side scroll member rotate at the same angular velocity in the same direction. And a synchronous drive mechanism for transmitting a driving force from the drive side scroll member to the driven side scroll member, wherein the drive side scroll member comprises a first drive side end plate and a first drive side A drive side scroll portion driven by the drive portion, a second drive side scroll portion having a second drive side end plate and a second drive side wall body, and the first drive side wall body And a wall fixing portion for fixing the tips in the rotational axis direction of the second drive side wall body facing each other, and the driven scroll member is provided on one side surface of the driven end plate, A first driven side wall engaged with the first drive side wall, and a second driven side wall provided on the other side of the driven side end plate and engaged with the second drive side wall; The timing at which the fluid is compressed and discharged differs from the timing at which the fluid is compressed and discharged in the second drive side scroll portion.

Pulsation of the fluid discharged from the compressor can be suppressed by varying the timing at which the fluid is compressed and discharged in each drive side scroll portion.
For example, the discharge timing can be made different by changing the shape of the wall and the shape of the end plate constituting the compression chamber.
The deviation amount of the discharge timing is 1 ° or more, preferably 5 ° or more, and more preferably 10 ° or more in the rotation angle of the scroll member.

  Further, in the dual-rotating scroll compressor according to one aspect of the present invention, a plurality of spiral drive side walls which are rotationally driven by the drive unit and installed at predetermined angular intervals around the center of the drive side end plate And a number of spiral driven side walls which are disposed at predetermined angular intervals around the center of the driven side end plate and correspond to each of the driving side walls. The driven side scroll member forming a compression space by meshing with each corresponding drive side wall, and the drive side scroll member and the driven side scroll member rotate at the same angular velocity in the same direction. And a synchronous drive mechanism for transmitting a driving force from the drive side scroll member to the driven side scroll member, wherein the drive side scroll member comprises a first drive side end plate and a first drive side A drive side scroll portion driven by the drive portion, a second drive side scroll portion having a second drive side end plate and a second drive side wall body, and the first drive side wall body And a wall fixing portion for fixing the tips in the rotational axis direction of the second drive side wall body facing each other, and the driven scroll member is provided on one side surface of the driven end plate, And a second driven side wall body provided on the other side surface of the driven side end plate and meshed with the second drive side wall body, wherein the second drive side scroll portion And a discharge port for discharging the fluid compressed by the second drive side scroll unit together with the fluid compressed by the first drive side scroll unit, and the fluid of the fluid compressed by the first drive side scroll unit Discharge pressure is before Characterized in that it is higher than the discharge pressure of the fluid compressed by the second driving scroll portions.

By making the discharge pressure of the fluid compressed by the first drive side scroll unit higher than the discharge pressure of the fluid compressed by the second drive side scroll unit, the discharge fluid introduced from the first drive side scroll is 2) It is possible to discharge smoothly from the discharge port provided in the drive scroll portion.
For example, the discharge pressure can be adjusted by changing the shape of the wall and the shape of the end plate constituting the compression chamber.
The pressure difference of the discharge pressure may be equal to or higher than the pressure difference to the extent that the discharge fluid from the first drive side scroll portion can flow out from the discharge port without being blocked by the discharge fluid from the second drive side scroll portion.

  Further, in the dual-rotating scroll compressor according to one aspect of the present invention, a plurality of spiral drive side walls which are rotationally driven by the drive unit and installed at predetermined angular intervals around the center of the drive side end plate And a number of spiral driven side walls which are disposed at predetermined angular intervals around the center of the driven side end plate and correspond to each of the driving side walls. The driven side scroll member forming a compression space by meshing with each corresponding drive side wall, and the drive side scroll member and the driven side scroll member rotate at the same angular velocity in the same direction. And a synchronous drive mechanism for transmitting a driving force from the drive side scroll member to the driven side scroll member, wherein the drive side scroll member comprises a first drive side end plate and a first drive side A drive side scroll portion driven by the drive portion, a second drive side scroll portion having a second drive side end plate and a second drive side wall body, and the first drive side wall body And a wall fixing portion for fixing the tips in the rotational axis direction of the second drive side wall body facing each other, and the driven scroll member is provided on one side surface of the driven end plate, A first driven side wall meshing with the first drive side wall, and a second driven side wall provided on the other side of the driven side plate and meshing with the second drive side wall; The wall height is greater than the wall height of the second drive side wall.

For example, since the first drive side scroll portion is driven by the drive portion, the rigidity is designed to be higher than that of the second drive side scroll portion. As described above, when the rigidity of the first drive side scroll portion is larger than that of the second drive side scroll portion, the wall height of the first drive side wall body is increased to make the second drive side wall body relatively. By reducing the wall height, the rigidity of the second drive side scroll portion can be increased.
The wall height is a dimension in the rotation axis direction of the wall installed in the end plate.

  Further, in the dual-rotating scroll compressor according to one aspect of the present invention, a plurality of spiral drive side walls which are rotationally driven by the drive unit and installed at predetermined angular intervals around the center of the drive side end plate And a number of spiral driven side walls which are disposed at predetermined angular intervals around the center of the driven side end plate and correspond to each of the driving side walls. The driven side scroll member forming a compression space by meshing with each corresponding drive side wall, and the drive side scroll member and the driven side scroll member rotate at the same angular velocity in the same direction. And a synchronous drive mechanism for transmitting a driving force from the drive side scroll member to the driven side scroll member, wherein the drive side scroll member comprises a first drive side end plate and a first drive side A drive side scroll portion driven by the drive portion, a second drive side scroll portion having a second drive side end plate and a second drive side wall body, and the first drive side wall body And a wall fixing portion for fixing the tips in the rotational axis direction of the second drive side wall body facing each other, and the driven scroll member is provided on one side surface of the driven end plate, And a second driven side wall body provided on the other side surface of the driven side end plate and meshed with the second drive side wall body, wherein the second drive side scroll portion And a discharge port for discharging the fluid compressed by the second drive side scroll portion together with the fluid compressed by the first drive side scroll portion, the wall height of the first drive side wall body is From the wall height of the second drive side wall Small.

  The fluid discharged from the first drive side scroll portion is discharged from the discharge port of the second drive side scroll portion. Therefore, a pressure loss will occur when the fluid is introduced from the first drive side scroll portion to the second drive side scroll portion. Therefore, the wall height of the first drive side wall is made smaller than the wall height of the second drive side wall. Thereby, the pressure loss can be reduced by reducing the flow rate of the fluid compressed in the first drive side scroll portion.

  The dual-rotating scroll compressor according to one aspect of the present invention includes a drive-side scroll member that has a spiral drive side wall body that is rotationally driven by a drive unit and disposed on a drive-side end plate, and disposed on a driven side end plate A driven side scroll member having a driven side wall body corresponding to the drive side wall body, the driven side wall body being engaged with the drive side wall body to form a compression space, and the drive side scroll member A synchronous drive mechanism for transmitting a driving force from the drive-side scroll member to the driven-side scroll member such that the driven-side scroll member rotates at the same angular velocity in the same direction, and the drive-side scroll member A drive side end plate and a first drive side wall body, and a first drive side scroll portion driven by the drive unit, a second drive side end plate and a second drive side wall body The driven side scroll member includes: a second drive side scroll portion; and a wall fixing portion that fixes the first drive side wall body and the second drive side wall body in a state in which the tips in the axial direction face each other. A second driven side wall provided on one side of the driven side end plate and engaged with the first drive side wall, and provided on the other side of the driven side end plate and engaged with the second drive side wall A first support member, which comprises a body, is disposed with the first drive side end plate interposed therebetween, is fixed to a distal end side in the axial direction of the first driven side wall body, and rotates with the first driven side wall body; A second support member disposed between the second driving side end plates and fixed to a tip end side in the axial direction of the second driven side wall body, and rotating with the second driven side wall body; First drive side scroll unit and the above The two drive side scroll parts are made of materials having the same linear expansion coefficient, and / or the driven side scroll member, the first support member and the second support member are made of materials having the same linear expansion coefficient. It is done.

The drive side wall disposed on the end plate of the drive side scroll member is engaged with the corresponding driven side wall of the driven side scroll member. The drive-side scroll member is rotationally driven by the drive unit, and the driving force transmitted to the drive-side scroll member is transmitted to the driven-side scroll member via the synchronous drive mechanism. Thus, the driven scroll member rotates and performs rotational motion at the same angular velocity in the same direction with respect to the drive scroll member. Thus, a dual-rotation scroll compressor is provided in which both the drive-side scroll member and the driven-side scroll member rotate.
Since the first drive side scroll member and the second drive side scroll member are fixed to each other, when a temperature change occurs, deformation occurs due to the thermal expansion difference to increase stress, and adversely affect the compression performance. Because they are feared, they are made of materials having the same coefficient of linear expansion. Moreover, it is preferable to use the same material. Furthermore, if the same material is used, it is possible to avoid the occurrence of electrolytic corrosion due to the reaction with water due to the difference in the ionization tendency at the fixed contact portions with each other.
Since the driven scroll member, the first support member, and the second support member are fixed to each other, when a temperature change occurs, the difference in thermal expansion causes deformation to increase the stress and adversely affect the compression performance. Because they are feared, they are made of materials having the same coefficient of linear expansion. In addition, if the same material is used, it is possible to avoid the occurrence of electrolytic corrosion due to the reaction with water due to the difference in ionization tendency at the fixed contact portions with each other.
As a material to be used, an aluminum alloy and a magnesium alloy are mentioned, for example.

  Furthermore, in the dual-rotating scroll compressor according to the present invention, the material used for the driven scroll member has a smaller specific gravity than the material used for the first drive scroll and the second drive scroll. It is characterized by being.

The driven-side end plate of the driven-side scroll member is a surface opposite to each of the tip end of the first drive side wall and the tip of the second drive side wall, and both sides thereof form a compression chamber. Therefore, it is difficult to reduce the weight of the driven end plate by performing meat stealing (undressing). On the other hand, the first drive side end plate and the second drive side end plate of the drive side scroll member only face the tip of the driven side wall body corresponding to only one side, and the opposite side does not form a compression chamber. Therefore, the first drive side end plate and the second drive side end plate can carry out meat theft on the surface where the compression chamber is not formed. For this reason, it is possible to reduce the weight of the drive side scroll member.
Therefore, the rotational inertia force is reduced by using a material having a smaller specific gravity than the material used for the driven scroll member whose weight can not be reduced more than the materials used for the first drive scroll unit and the second drive scroll unit. Can be
For example, an aluminum alloy is used for the first moving scroll and the second driving scroll, and a magnesium alloy is used for the driven scroll.

  The dual-rotating scroll compressor according to one aspect of the present invention includes a drive-side scroll member that has a spiral drive side wall body that is rotationally driven by a drive unit and disposed on a drive-side end plate, and disposed on a driven side end plate A driven side scroll member having a driven side wall corresponding to the drive side wall, the driven side wall being engaged with the drive side wall to form a compression chamber, and the drive side scroll member A synchronous drive mechanism for transmitting a driving force from the drive-side scroll member to the driven-side scroll member such that the driven-side scroll member rotates at the same angular velocity in the same direction, and the drive-side scroll member A first drive side end plate and a first drive side wall body, and a first drive side scroll portion driven by the drive unit, a second drive side end plate, and a second drive side wall body The driven scroll portion, and a wall fixing portion fixed in a state where tips in the axial direction of the first drive side wall and the second drive side wall face each other, the driven side scroll member includes the driven side scroll member. A second driven side wall provided on one side of the side end plate and engaged with the first drive side wall, and provided on the other side of the driven side end plate and engaged with the second drive side wall And a through hole or a notch is formed in the vicinity of the outer peripheral end of the driven side wall in the driven side end plate.

The drive side wall disposed on the end plate of the drive side scroll member is engaged with the corresponding driven side wall of the driven side scroll member. The drive-side scroll member is rotationally driven by the drive unit, and the driving force transmitted to the drive-side scroll member is transmitted to the driven-side scroll member via the synchronous drive mechanism. Thus, the driven scroll member rotates and performs rotational motion at the same angular velocity in the same direction with respect to the drive scroll member. Thus, a dual-rotation scroll compressor is provided in which both the drive-side scroll member and the driven-side scroll member rotate.
In the driven side end plate, a through hole or a notch is formed in the vicinity of the outer peripheral end of the driven side wall. Thus, pressure equalization can be achieved by communicating the compression chambers formed on both sides of the driven end plate, and it is possible to reduce the possibility of inhibiting the discharge when the compression chambers on both sides merge before the discharge of the working fluid. In addition, it is possible to reduce the possibility that a thrust load is generated on the scroll member due to the pressure difference between the compression chambers on both sides. Further, since the through hole or the notch is formed in the vicinity of the outer peripheral end of the driven side wall body to reduce the weight of the outer peripheral side of the driven scroll member, the rotational inertia force of the driven scroll member can be reduced. .
Further, since the through holes or the notches are located in the vicinity of the outer peripheral end of the driven side wall, recompression can be reduced by pressure equalization before the pressure rises to a predetermined value or more.
The vicinity of the outer peripheral end of the driven side wall means, for example, ± 120 °, preferably ± 90 °, more preferably ± 45 ° from the center of the spiral wall, when the position of the outer peripheral end is 0 °. Means a range of °.
The number of through holes may be one or plural.

  Furthermore, in the dual-rotating scroll compressor according to one aspect of the present invention, the through hole is formed at a position close to the ventral side of the driven side wall.

  By forming the through holes at a position closer to the ventral side of the driven side wall, that is, at a position closer to the ventral side than the back side opposite to the ventral side, the through holes can be positioned as far as possible on the outer peripheral side. it can. Thereby, the rotational inertia force of the driven scroll member can be further reduced.

  The dual-rotating scroll compressor according to one aspect of the present invention includes a drive-side scroll member that has a spiral drive side wall body that is rotationally driven by a drive unit and disposed on a drive-side end plate, and disposed on a driven side end plate A driven side scroll member having a driven side wall corresponding to the drive side wall, the driven side wall being engaged with the drive side wall to form a compression chamber, and the drive side scroll member And a synchronous drive mechanism for transmitting a driving force from the drive-side scroll member to the driven-side scroll member so that the driven-side scroll member rotates at the same angular velocity in the same direction, and the drive-side scroll member It has a first drive side end plate and a first drive side wall body, and has a first drive side scroll portion driven by the drive portion, a second drive side end plate and a second drive side wall body. The driven side scroll member includes: a second drive side scroll portion; and a wall fixing portion that fixes the first drive side wall body and the second drive side wall body in a state in which tips in the axial direction face each other. A second driven side wall provided on one side of the driven side end plate and meshed with the first drive side wall, and a second driven side provided on the other side of the driven side end plate and meshed with the second drive side wall A side wall body, the drive-side scroll member is not subjected to surface treatment, and the driven-side scroll member is subjected to surface treatment at least in a region in contact with the drive-side scroll member There is.

The drive side wall disposed on the end plate of the drive side scroll member is engaged with the corresponding driven side wall of the driven side scroll member. The drive-side scroll member is rotationally driven by the drive unit, and the driving force transmitted to the drive-side scroll member is transmitted to the driven-side scroll member via the synchronous drive mechanism. Thus, the driven scroll member rotates and performs rotational motion at the same angular velocity in the same direction with respect to the drive scroll member. Thus, a dual-rotation scroll compressor is provided in which both the drive-side scroll member and the driven-side scroll member rotate.
The surface treatment was not performed on the drive side scroll member, and the surface treatment was performed on the driven side scroll member at least in the region in contact with the drive side scroll member. As a result, even if the same type of metal material is used as the base material of the drive side scroll member and the driven side scroll member, burn-in can be avoided. In addition, since it is sufficient to surface-treat one driven-side scroll member instead of surface-treating two of the first drive-side scroll portion and the second drive-side scroll portion, cost can be reduced. Can. From the above, it is possible to reduce the cost while maintaining the durability of the scroll member.
In addition, when surface treatment is performed on two of the first drive side scroll portion and the second drive side scroll portion, there is a possibility that the film thicknesses formed by the surface treatment may differ from each other. If the film thickness is different, the clearance (tip clearance) between the drive side end plate and the tip of the driven side wall may be different, which may adversely affect the compression performance. On the other hand, by performing surface treatment on one driven scroll member, surface treatment is performed under the same conditions, so that the film thickness of both surfaces of the driven end plate can be made equal, and the chip clearance can be made accurate. Can manage well.
As a material of the drive side scroll member and the driven side scroll member, for example, an aluminum alloy, a magnesium alloy, or an iron-based material is used. Moreover, as surface treatment, electroless nickel phosphorus (Ni-P) plating is used, for example.

  Furthermore, in the dual-rotating scroll compressor according to one aspect of the present invention, the drive side wall body is disposed in a plurality at predetermined angular intervals around the center of the drive side end plate, and the driven side wall body is The first driven side walls and / or the second driven side walls are disposed at a predetermined angular interval around the center of the driven side plate and corresponding to the driving side walls, and the first driven side walls are the first driven side walls. The surface treatment is performed on the outer peripheral side of the range from the winding end of the body and / or the second driven sidewall to the angle obtained by dividing π (rad) by the number of the first driven sidewall or the second driven sidewall. Has not been applied.

  In the range from the winding end of the wall to the angle obtained by dividing π (rad) by the number of walls provided on one end plate, the outer peripheral side (back side) of the wall contacts the corresponding drive side wall do not do. Therefore, since it is not necessary to perform surface treatment in this angle range, this angle range can be made into the fixed position of the jig at the time of surface treatment. Specifically, at the time of surface treatment, the jig is fixed to this angle range to support the driven scroll member. Thus, the driven scroll member can be stably supported and subjected to surface treatment. In addition, it is not necessary to provide the range which does not provide a surface treatment over the whole of the above-mentioned angle range, and the area | region which fixes a jig | tool should just be made into a non-surface treatment area | region.

  Furthermore, in the dual-rotating scroll compressor according to one aspect of the present invention, a through hole is provided at the center of the driven end plate, and the surface treatment is provided on the inner circumferential surface forming the through hole. It is not done.

  A through hole for discharging the compressed fluid is provided at the center of the driven end plate. The drive side wall does not contact the inner peripheral surface forming the through hole. Therefore, since it is not necessary to surface-treat the inner peripheral surface of a through-hole, the inner peripheral surface of a through-hole can be made into the fixing position of the jig | tool at the time of surface treatment. Specifically, in the surface treatment, a rod-like jig is passed through the through hole, the jig is pressed against the inner peripheral surface of the through hole, fixed, and the driven scroll member is supported. Thus, the driven scroll member can be stably supported and subjected to surface treatment. In addition, it is not necessary to provide the range which does not provide surface treatment over the whole inner peripheral surface of a through-hole, and it is sufficient to set the area | region which fixes a jig | tool as a non-surface treatment area | region.

  The wall of the drive side scroll member is constituted by the first drive side wall and the second drive side wall, and the height direction of the wall of the drive side scroll is divided. Thereby, the processing height at the time of processing a wall can be reduced, and it becomes possible to process with high precision and at high speed.

  With respect to the driven scroll member, the first driven end plate and the second driven end plate are not shared by one member, and the other side surfaces of the first driven end plate and the second driven end plate are overlapped. Since it fixes together, the 1st follower side scroll part and the 2nd follower side scroll part can be used as another member. As a result, the processability can be improved and the cost can be reduced.

  By forming the drive-side scroll portion, the driven-side scroll member, and the support members fixed to each other from the same type of material, it is possible to suppress an increase in stress due to a temperature change and a decrease in compression performance.

  Since the housing is provided with a hole to allow access to the drive side scroll member and the support member, assembly can be easily performed.

  Since the surface treatment is performed on the driven scroll member without performing the surface treatment on the drive side scroll member, the cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is the longitudinal cross-sectional view which showed the twin-rotating scroll type compressor concerning 1st Embodiment of this invention. It is the perspective view which showed the 1st drive side scroll part of FIG. It is the top view which showed the 2nd drive side scroll part of FIG. It is the longitudinal cross-sectional view which showed the state positioned by the key groove part and the key member. It is the perspective view which concerns on 2nd Embodiment of this invention and showed the 1st drive side scroll member. It is a perspective view showing the 2nd drive side scroll member concerning a 2nd embodiment of the present invention. It is the longitudinal cross-sectional view which showed the state positioned by the groove part and the convex part. It is the longitudinal cross-sectional view which showed the twin-rotating scroll type compressor concerning 3rd Embodiment of this invention. It is the top view which showed the drive side scroll member of FIG. It is the top view which showed the driven side scroll member of FIG. It is a graph at the time of making discharge timing correspond as a reference example of the pressure change of the double rotation scroll-type compressor which concerns on 4th Embodiment of this invention. It is a graph at the time of showing pressure change of a both-rotations scroll type compressor concerning a 4th embodiment of the present invention, and making discharge timing different. It is a graph at the time of making discharge pressure of the 2nd scroll part high as a reference example of a pressure change of a both rotation scroll type compressor concerning a 5th embodiment of the present invention. It is a graph at the time of showing the pressure change of the both-rotations scroll type compressor concerning a 5th embodiment, and raising the discharge pressure of the 1st scroll part. It is a principal part longitudinal cross-sectional view of the both-rotation scroll type | mold compressor corresponding to FIG. 12A. It is a principal part longitudinal cross-sectional view of the both-rotation scroll type | mold compressor corresponding to FIG. 12B. It is the longitudinal cross-sectional view which showed the both-rotating scroll type compressor concerning 6th Embodiment of this invention. It is the longitudinal cross-sectional view which showed the twin-rotating scroll type compressor concerning 7th Embodiment of this invention. It is the longitudinal cross-sectional view which showed the both-rotation scroll type | mold compressor which concerns on 8th Embodiment of this invention. FIG. 17 is a longitudinal sectional view showing the drive side scroll member of FIG. 16; FIG. 17 is a longitudinal sectional view showing the driven scroll member of FIG. 16; FIG. 17 is a plan view showing a driven side scroll member shown in FIG. 16 according to a ninth embodiment of the present invention. It is the top view which showed the meshing state of a drive side scroll member and a driven side scroll member. It is sectional drawing in arrow B of FIG. It is the top view which showed the meshing state of the drive side scroll member and the driven side scroll member as a reference example. It is sectional drawing in arrow C of FIG. It is the top view which showed the modification of the driven side scroll member. It is the figure which concerns on 10th Embodiment of this invention and which showed the state which engaged two scroll members.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described with reference to FIG.
FIG. 1 shows a dual-rotation scroll compressor 1. The dual-rotating scroll compressor 1 is, for example, a supercharger that compresses combustion air (fluid) supplied to an internal combustion engine such as a vehicle engine, or a compressor for supplying compressed air to an air electrode of a fuel cell. It can be used as a compressor for supplying compressed air used for a braking device of a vehicle such as a railway.

  The double-rotating scroll compressor 1 includes a housing 3, a motor (drive unit) 5 housed on one end side of the housing 3, and a drive-side scroll member 70 and a driven-side scroll member housed on the other end side of the housing 3. It has 90 and.

The housing 3 has a substantially cylindrical shape, and includes a motor housing portion (first housing) 3a housing the motor 5 and a scroll housing portion (second housing) 3b housing the scroll members 70 and 90. .
Cooling fins 3c for cooling the motor 5 are provided on the outer periphery of the motor housing 3a. At the end of the scroll housing portion 3b, a discharge port 3d for discharging the compressed air is formed. Although not shown in FIG. 1, the housing 3 is provided with an air intake port for sucking air.
The scroll housing portion 3 b of the housing 3 is divided at a division plane P located substantially at the center of the scroll members 70 and 90 in the axial direction. The housing 3 is provided with a flange portion 30 which protrudes outward at a predetermined position in the circumferential direction. The division surface P is fastened by fixing the flange portion 30 through a bolt 32 as a fastening means.

The motor 5 is driven by supplying power from a power supply source (not shown). The rotation control of the motor 5 is performed by a command from a control unit (not shown). The stator 5 a of the motor 5 is fixed to the inner peripheral side of the housing 3. The rotor 5b of the motor 5 rotates around the drive side rotation axis CL1. The drive shaft 6 extending on the drive side rotation axis line CL1 is connected to the rotor 5b. The drive shaft 6 is connected to the first drive side shaft 7 c of the drive side scroll member 70.
The drive shaft 6 is rotatably supported between the housing 3 and the rear end (right end in FIG. 1) of the drive shaft 6, that is, the end of the drive shaft 6 opposite to the drive scroll member 70. A rear end bearing 17 is provided.

The drive side scroll member 70 includes a first drive side scroll portion 71 on the motor 5 side and a second drive side scroll portion 72 on the discharge port 3 d side.
The first drive side scroll portion 71 includes a first drive side end plate 71a and a first drive side wall 71b.
The first drive side end plate 71a is connected to a first drive side shaft 7c connected to the drive shaft 6, and extends in a direction orthogonal to the drive side rotational axis CL1. The first drive side shaft portion 7c is rotatably provided with respect to the housing 3 via a first drive side bearing 11 which is an angular ball bearing.

  The first drive side end plate 71a has a substantially disc shape in a plan view. As shown in FIG. 2, on the first drive side end plate 71a, two or two spiral first drive side walls 71b are provided. The two first drive side walls 71b are arranged at equal intervals around the drive side rotation axis CL1. The wound end portions 71e of the first drive side wall 71b are not fixed to the other wall portions but are independent. That is, no wall portion is provided to connect and reinforce the respective winding end portions 71e. The number of the first drive side wall 71b may be one or three or more.

As shown in FIG. 1, the second drive side scroll portion 72 includes a second drive side end plate 72 a and a second drive side wall 72 b. As shown in FIG. 3, the second drive side wall body 72b is in the form of two strips in the same manner as the first drive side wall body 71b (see FIG. 2) described above. The wound end portions 72e of the second drive side wall 72b are not fixed to the other wall portions but are independent. That is, no wall is provided to connect and reinforce the end portions 72e. The number of the second drive side wall members 72b may be one or three or more.
A second drive side shaft portion 72c extending in the direction of the drive side rotation axis CL1 is connected to the second drive side end plate 72a. The second drive side shaft portion 72c is rotatably provided relative to the housing 3 via a second drive side bearing 14 which is an angular ball bearing. A preloading member 14a such as a nut or a disc spring is provided on the side of the inner ring of the second drive-side bearing 14, for example. The preloading member 14a is attached to the second drive side shaft portion 72c, and is fixed so as to press the inner ring of the second drive side bearing 14 toward the first drive side bearing 11. As a result, the axial clearance between the enlarged shoulder portion of the second drive side shaft portion 72c and the side surface of the second drive side bearing 14 is made zero.
The second drive side shaft portion 72c is formed with a discharge port 72d along the drive side rotational axis CL1.

  The first drive side scroll portion 71 and the second drive side scroll portion 72 are fixed in a state in which the tips (free ends) of the wall bodies 71 b and 72 b face each other. The heights of the wall bodies 71b and 72b are equal.

Fixing of the first drive side scroll portion 71 and the second drive side scroll portion 72 is achieved by fastening bolts (walls fixed to a flange portion 73 provided at a plurality of places in the circumferential direction so as to protrude outward in the radial direction) Part 31).
The bolt 31 passes through the through hole 73a (see FIG. 2) provided in the flange portion 73 of the first drive side wall 71b and into the female screw hole 73b (see FIG. 3) provided in the flange portion 73 of the second drive side wall 72b. Is concluded.

As shown in FIG. 2, a key groove 71b1 having a predetermined width and a predetermined depth is formed along the spiral shape at the tip of the first driving side wall 71b. As shown in FIG. 3, a key groove 72b1 having a predetermined width and a predetermined depth is also formed along the spiral shape at the end of the second drive side wall 72b. These key groove portions 71b1 and 72b1 are provided at the same positions when the tips of the wall bodies 71b and 72b are put together.
A key member 74 is inserted into the key groove portions 71b1 and 72b1 as shown in FIG. The key member 74 has a rectangular cross section, and has a spiral shape along the shapes of the key groove portions 71b1 and 72b1 in plan view.
The key groove portions 71b1 and 72b1 and the key member 74 are set at positions (angle ranges) which do not interfere with the driven end plate 90a. Further, the key grooves 71 b 1 and 72 b 1 and the key member 74 may be provided in a plurality of angle ranges.

The driven scroll member 90 has a driven end plate 90a provided substantially at the center in the axial direction (horizontal direction in the figure). A through hole 90h is formed at the center of the driven end plate 90a, and compressed air flows to the discharge port 72d.
The driven side walls 91b and 92b are provided on both sides of the driven end plate 90a. The first driven side wall body 91b installed on the motor 5 side from the driven side end plate 90a is engaged with the first drive side wall body 71b of the first drive side scroll portion 71, and on the discharge port 3d side from the driven side end plate 90a. The installed second driven side wall 92 b is engaged with the second driving side wall 72 b of the second driving scroll portion 72.
As shown in FIG. 3, two or two first driven side walls 91 b are provided. The two driven side wall bodies 91b are arranged at equal intervals around the driven side rotation axis CL2. The second driven side wall 92b has a similar configuration. The number of the driven side walls 91b and 92b may be one or three or more.

  A first support member 33 and a second support member 35 are provided at both ends of the driven scroll member 90 in the axial direction (horizontal direction in the drawing). The first support member 33 is disposed on the motor 5 side, and the second support member 35 is disposed on the discharge port 3 d side. The first support member 33 is fixed to the end (free end) of the first driven side wall 91b by the pin 25a, and the second support member 35 is connected to the end (free) of the second driven side wall 92b by the pin 25b. Fixed to the end).

  A first support member shaft 33a is provided on the central axis side of the first support member 33, and the first support member shaft 33a is an angular ball bearing. It is fixed to the housing 3 via the 1 driven side bearing) 37. The second support member shaft portion 35a is provided on the central axis side of the second support member 35, and the second support member shaft (the second support member shaft portion 35a is an angular ball bearing) 2) It is being fixed with respect to the housing 3 via the 38 following bearing. Thus, the driven scroll member 90 is configured to rotate around the second central axis CL2 via the support members 33 and 35.

  A pin ring mechanism (synchronous drive mechanism) 15 is provided between the first support member 33 and the first drive side end plate 71a. That is, the ring member 15 a is provided on the first drive side end plate 71 a, and the pin member 15 b is provided on the first support member 33. The pin ring mechanism 15 is used as a synchronous drive mechanism for transmitting a driving force from the drive side scroll member 70 to the driven side scroll member 90 so that the scroll members 70 and 90 synchronously revolve.

  A pin ring mechanism (synchronous drive mechanism) 15 is provided between the second support member 35 and the second drive side end plate 72a. That is, the ring member 15 a is provided on the second drive side end plate 72 a, and the pin member 15 b is provided on the second support member 35. The pin ring mechanism 15 is used as a synchronous drive mechanism for transmitting a driving force from the drive side scroll member 70 to the driven side scroll member 90 so that the scroll members 70 and 90 synchronously revolve.

The twin-rotating scroll compressor 1 configured as described above operates as follows.
When the drive shaft 6 is rotated about the drive-side rotation axis CL1 by the motor 5, the first drive-side shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive-side scroll member 70 is driven along the drive-side rotation axis CL1. Rotate around. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, as the pin member 15b of the pin ring mechanism 15 moves while being in contact with the ring member 15a, the scroll members 70 and 90 relatively rotate and revolve.
When both scroll members 70, 90 perform a revolution movement, air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and a compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the through hole 90h formed in the driven side end plate 90a, and the second drive side wall 72b and the second driven side wall 92b The air that has been compressed is merged with the air that has been compressed, and the merged air passes through the discharge port 72 d and is discharged from the discharge port 3 d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

According to the present embodiment, the following effects are achieved.
The drive side scroll member 70 is configured by the first drive side wall 71b and the second drive side wall 72b, and the height direction of the walls 71b and 72b of the drive side scroll member 70 is divided. Thereby, the processing height at the time of processing wall bodies 71b and 72b, for example with an end mill can be reduced, and it becomes possible to process with high accuracy and high speed.

  The tips of the two drive side walls 71 b and 72 b are fixed by bolts 31. Further, key grooves 71b1 and 72b1 provided at the tip of the first drive side wall 71b and the tip of the second drive side wall 72b, and a key member 74 inserted into the key grooves 71b1 and 72b1 are provided. . Since the key grooves 71b1 and 72b1 are formed in a spiral shape provided along the tips of the spiraled walls 71b and 72b, positioning in not only one direction but also two directions (that is, the walls 71b and 72b are planarized) Positioning in a two-dimensional direction along a plane when viewed can be made possible, and wall bodies 71 b and 72 b can be accurately combined.

Second Embodiment
Next, a second embodiment of the present invention will be described with reference to FIGS.
The present embodiment is different from the first embodiment in that the inlay structure is used instead of the positioning structure using the key groove portions 71 b 1 and 72 b 1 and the key member 74. Therefore, the same reference numerals are given to the common components and the description thereof is omitted.

As shown in FIG. 5, a groove 71b2 having a constant width and a constant depth is formed along the spiral shape at the tip of the first driving side wall 71b. As shown in FIG. 6, a convex portion 72b2 having a constant width and a constant height is formed along the spiral shape at the tip of the second driving side wall 72b. The groove portion 71 b 2 and the convex portion 72 b 2 are provided at the same position when the tips of the wall bodies 71 b and 72 b are put together.
As shown in FIG. 7, the walls 71 b and 72 b are positioned with each other in a state where the convex portion 72 b 2 is inserted into and fitted in the groove portion 71 b 2.
The groove 71b2 and the projection 72b2 are set at positions (angle ranges) that do not interfere with the driven end plate 90a. In addition, the groove 71 b 2 and the protrusion 72 b 2 may be provided in a plurality of angle ranges.

According to the present embodiment, the following effects are achieved.
A groove 71b2 is provided at the end of the first drive side wall 71b, and a protrusion 72b2 provided at the end of the second drive side wall 72b and inserted into the groove 71b2. Since the groove 71b2 and the projection 72b2 are provided along the tip of the spirally wound wall, positioning in not only one direction but also two directions (that is, along the plane when the walls 71b and 72b are viewed in plan) Two-dimensional positioning) is possible, and walls can be accurately combined.

  A groove may be provided in the second drive side wall 72b, and a protrusion may be provided in the first drive side wall 71b.

Third Embodiment
Hereinafter, a third embodiment of the present invention will be described with reference to FIG.
FIG. 8 shows a dual rotation scroll compressor 1A. The double-rotating scroll compressor 1A can be used, for example, as a turbocharger that compresses combustion air (fluid) supplied to an internal combustion engine such as a vehicle engine.

  The double-rotating scroll compressor 1A includes a housing 3, a motor (drive portion) 5 accommodated on one end side of the housing 3, a drive-side scroll member 70 and a driven-side scroll member accommodated on the other end side of the housing 3. It has 90 and.

The housing 3 has a substantially cylindrical shape, and includes a motor storage portion 3 a for storing the motor 5 and a scroll storage portion 3 b for storing the scroll members 7 and 9.
Cooling fins 3c for cooling the motor 5 are provided on the outer periphery of the motor housing 3a. At the end of the scroll housing portion 3b, a discharge port 3d for discharging the compressed air is formed. Although not shown in FIG. 8, the housing 3 is provided with an air intake port for sucking air.
The scroll housing portion 3 b of the housing 3 is divided at a division plane P located at a substantially central portion in the axial direction of the scroll members 70, 70. The housing 3 is provided with a flange portion (not shown) that protrudes outward at a predetermined position in the circumferential direction. The division surface P is fastened by fixing to this flange portion through a bolt or the like as a fastening means.

  The motor 5 is driven by supplying power from a power supply source (not shown). The rotation control of the motor 5 is performed by a command from a control unit (not shown). The stator 5 a of the motor 5 is fixed to the inner peripheral side of the housing 3. The rotor 5b of the motor 5 rotates around the drive rotation axis CL1. The drive shaft 6 extending on the drive rotation axis CL1 is connected to the rotor 5b. The drive shaft 6 is connected to the drive side drive shaft 7 c of the drive side scroll member 70.

The drive side scroll member 70 includes a first drive side scroll portion 71 on the motor 5 side and a second drive side scroll portion 72 on the discharge port 3 d side.
The first drive side scroll portion 71 includes a first drive side end plate 71a and a first drive side wall 71b.
The first drive side end plate 71a is connected to the drive side shaft 7c connected to the drive shaft 6, and extends in a direction orthogonal to the drive side rotation axis CL1. The drive side shaft portion 7 c is rotatably provided with respect to the housing 3 via a drive side bearing 11 formed as a ball bearing.

  The first drive side end plate 71a has a substantially disc shape in a plan view. As shown in FIG. 9, three or three first drive side wall bodies 71b in a spiral shape are provided on the first drive side end plate 71a. The first drive side wall 71b in the form of three strips is disposed at equal intervals around the drive side rotation axis CL1. The wound end portions 71e of the first drive side wall 71b are not fixed to the other wall portions but are independent. That is, no wall portion is provided to connect and reinforce the respective winding end portions 71e.

As shown in FIG. 8, the second drive side scroll portion 72 includes a second drive side end plate 72 a and a second drive side wall 72 b. The second drive side wall body 72b is formed in three lines in the same manner as the first drive side wall body 71b (see FIG. 9) described above.
A second drive side shaft portion 72c extending in the direction of the drive side rotation axis CL1 is connected to the second drive side end plate 72a. The second drive side shaft portion 72c is rotatably provided relative to the housing 3 via a second drive side bearing 14 which is a ball bearing. A discharge port 72d is formed in the second drive side shaft portion 72a along the drive side rotation axis line CL1.

  The first drive side scroll portion 71 and the second drive side scroll portion 72 are fixed in a state in which the tips (free ends) of the wall bodies 71 b and 72 b face each other. Fixing of the first drive side scroll portion 71 and the second drive side scroll portion 72 is achieved by fastening bolts (walls fixed to a flange portion 73 provided at a plurality of places in the circumferential direction so as to protrude outward in the radial direction) Part 31).

The driven scroll member 90 includes a first driven scroll portion 91 and a second driven scroll portion 92. The driven side end plates 91a and 92a are located substantially at the center of the driven side scroll member 90 in the axial direction (horizontal direction in the drawing). The two driven end plates 91a and 92a are fixed in a state where their respective back surfaces (other side surfaces) are overlapped and in contact with each other. This fixing is performed by bolts, pins, etc., though not shown. A through hole 90h is formed at the center of each of the driven end plates 91a and 92a, and compressed air flows to the discharge port 72d.
A first driven side wall 91b is provided on one side of the first driven side end plate 91a, and a second driven side wall 92b is provided on one side of the second driven side end plate 92a. There is. The first driven side wall 91b disposed on the motor 5 side from the first driven side end plate 91a is engaged with the first drive side wall 71b of the first drive side scroll portion 71, and is discharged from the second driven side end plate 92a. The second driven side wall 92 b disposed on the outlet 3 d side is engaged with the second driving side wall 72 b of the second driving scroll portion 72.

  As shown in FIG. 10, three or three first driven side walls 91b are provided. The three driven side wall bodies 9b are arranged at equal intervals around the driven side rotation axis CL2. Support members 33 and 35, which will be described later, are fixed to the outer periphery of the first driven sidewall body 91b. The second driven side wall 92b has a similar configuration.

  A first support member 33 and a second support member 35 are provided at both ends of the driven scroll member 90 in the axial direction (horizontal direction in the drawing). The first support member 33 is disposed on the motor 5 side, and the second support member 35 is disposed on the discharge port 3 d side. The first support member 33 is fixed to the end (free end) of the first driven side wall 91 b, and the second support member 35 is fixed to the end (free end) of the second driven side wall 92 b. It is done. A shaft portion 33 a is provided on the central axis side of the first support member 33, and the shaft portion 33 a is fixed to the housing 3 via a first support member bearing 37. A shaft portion 35 a is provided on the central axis side of the second support member 35, and the shaft portion 35 a is fixed to the housing 3 via a second support member bearing 38. Thus, the driven scroll member 90 is configured to rotate around the second central axis CL2 via the support members 33 and 35.

  A pin ring mechanism (synchronous drive mechanism) 15 is provided between the first support member 33 and the first drive side end plate 71a. That is, a circular hole is provided in the first drive side end plate 71 a, and the pin member 15 b is provided in the first support member 33. While the driving force is transmitted from the drive side scroll member 70 to the driven side scroll member 90 by the pin ring mechanism 15, both scroll members 70, 90 rotate at the same angular velocity in the same direction.

The twin-rotating scroll compressor 1A configured as described above operates as follows.
When the drive shaft 6 is rotated about the drive rotation axis CL1 by the motor 5, the drive shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive scroll member 70 is rotated about the drive rotation axis CL1. Rotate. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, when the pin member 15b of the pin ring mechanism 15 moves in contact with the inner circumferential surface of the circular hole, both scroll members 70, 90 rotate at the same angular velocity in the same direction.
When both scroll members 70, 90 rotate, the air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and the compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the through holes 90h formed in the driven side end plates 91a and 92a, and the second drive side wall 72b and the second driven side wall The air that has been compressed by the air flow 92b merges, and the air after the merging flows through the discharge port 72d and is discharged from the discharge port 3d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

According to the present embodiment, the following effects are achieved.
The first drive side wall 71b and the first driven side wall 91b engage with each other to form a compression chamber, and the second drive side wall 72b and the second driven side wall 92b form a compression chamber. Thus, separate compression chambers will be formed. At this time, the first drive side scroll portion 71 and the second drive side scroll portion 72 are separate members. As a result, the processability of the drive-side scroll member 70 can be improved and the cost can be reduced.
Further, with regard to the driven scroll member 90, the first driven end plate 91a and the second driven end may be used without sharing the first driven end plate 91a and the second driven end plate 92a with one member. Since the back surface with the plate 92 a is overlapped and fixed, the first driven scroll portion 91 and the second driven scroll portion 92 can be separate members. Thus, the processability of the driven scroll member 90 is also improved, and the cost can be reduced.

Fourth Embodiment
Next, a fourth embodiment of the present invention will be described using FIG.
In this embodiment, the discharge timings of the air compressed by the first scroll units 71 and 92 and the second scroll units 72 and 92 are different. The other configuration is the same as that of the third embodiment, and thus the description will be omitted while referring to FIGS. 8 to 10.
The first wall 71b, 72b and the second wall 91b, 92b have different shapes. Specifically, the second walls 91 b and 92 b are shifted from the first walls 71 b and 72 b around the symmetry centers of the respective walls. Thus, the timing at which the air is compressed and discharged by the first scroll portions 71 and 91 is different from the timing at which the air is compressed and discharged to the second scroll portions 71 and 92.

Specifically, as shown in FIG. 11B, the air compressed by the first scroll parts 71 and 91 changes in pressure as shown by the curve L1, and the air compressed by the second scroll parts 72 and 92 changes in pressure Timing is delayed for a predetermined time, resulting in a pressure change such as curve L2. At this time, the pressure discharged from the discharge port 72d is as shown by a curve L3, which is a combined pressure change of the curve L1 and the curve L2. In the same drawing, the position of the pressure P1 indicates the timing at which the discharge port 72d opens.
On the other hand, as shown in FIG. 11A, when the first wall 71b, 72b and the second wall 91b, 92b have the same shape and the timing of the pressure change is the same, the pressure discharged from the discharge port 72d Becomes a curve L4 and is a pressure change that is a combination of the curve L1 and the curve L2 that change in pressure at the same timing. As can be seen by comparing FIGS. 11A and 11B, the peak pressure is lower in FIG. 11B in which the ejection timing is shifted.

Therefore, according to the present embodiment, the pulsation of the air discharged from the compressor 1A can be suppressed by differentiating the timings at which the air is compressed and discharged in the scroll portions 71, 91, 72, 92.
The deviation amount of the discharge timing is 1 ° or more, preferably 5 ° or more, and more preferably 10 ° or more in the rotation angle of the scroll member.

Fifth Embodiment
Next, a fifth embodiment of the present invention will be described using FIG. 12 and FIG.
In the present embodiment, the discharge pressures of the air compressed by the first scroll portions 71 and 92 and the second scroll portions 72 and 92 are different. The other configuration is the same as that of the third embodiment, and thus the description will be omitted while referring to FIGS. 8 to 10.
The first wall 71b, 72b and the second wall 91b, 92b have different shapes. Specifically, the number of turns of the first wall 71b, 72b is made larger than the number of turns of the second wall 91b, 92b. As a result, the discharge pressure of the air compressed by the first scroll portions 71 and 92 is higher than the discharge pressure of the air compressed by the second scroll portions 72 and 92.

Specifically, as shown in FIG. 12B, the air compressed by the first scroll portions 71 and 91 (curve L1) has a discharge pressure higher than the air compressed by the second scroll portions 72 and 92 (curve L2). Is high. Thus, by making the discharge pressure of the first scroll portions 71, 91 higher than that of the second scroll portions 72, 92, as shown in FIG. 13B, the air flowing out of the first scroll portions 71, 92 After flowing into the second scroll portion 72, 92, it flows smoothly toward the discharge port 72d.
On the other hand, as shown in FIG. 12A, when the discharge pressure relationship is reverse, that is, when the discharge pressure of the second scroll portions 72 and 92 is larger than that of the first scroll portions 71 and 91, as shown in FIG. The discharge air flows back from the second scroll portions 72 and 92 to the first scroll portions 71 and 91, and the discharge air from the first scroll portions 71 and 91 can flow smoothly toward the discharge port 72d. Can not.

Therefore, according to the present embodiment, the discharge pressure of the air compressed by the first scroll portions 71 and 91 is made higher than the discharge pressure of the air compressed by the second scroll portions 72 and 92. The discharge air introduced from the scrolls 71 and 91 can be smoothly discharged from the discharge port 72 d via the second scroll portions 72 and 92. The discharge pressure may be adjusted by changing the shape of the end plates 71a, 72a, 91a, 92a constituting the compression chamber.
If the pressure difference between the discharge pressure is equal to or more than the pressure difference to the extent that the discharge air from the first scroll parts 71 and 91 can flow out from the discharge port 72 d without being blocked by the discharge air from the second scroll parts 72 and 92. good.

Sixth Embodiment
Next, a sixth embodiment of the present invention will be described using FIG.
The double-rotating scroll compressor 1B of this embodiment differs from the third embodiment in the tooth height of the first scroll members 71 and 91 and the tooth height of the second scroll members 72 and 92. The other configuration is the same as that of the third embodiment, so the description will be omitted using the same reference numerals.
As shown in FIG. 14, the tooth height (wall height) of the first wall 71b, 92b is longer than the tooth height of the second wall 72b, 92b. Therefore, the positions of the driven side end plates 91 a and 92 a are shifted from the center of the axial position of the scroll members 70 and 90 toward the discharge port 3 d.
In the present embodiment, the pinning mechanism 15 is provided on the first drive side end plate 71 a to transmit the driving force to the driven scroll member 90, so that the first drive side scroll portion 71 of the second drive side scroll portion 72 is It is configured to be more rigid. Therefore, when the rigidity of the first drive side scroll portion 71 is larger than that of the second drive side scroll portion 72, the tooth length of the first drive side wall 71b is increased to relatively increase the second drive side wall 72b. The rigidity of the second drive side scroll portion can be enhanced by shortening the tooth height of the second drive side scroll portion.
Although the driven side end plates 91a and 92a shown in FIG. 14 are made of the same member, they may be made of separate members as shown in FIG.

Seventh Embodiment
Next, a seventh embodiment of the present invention will be described using FIG.
The double-rotating scroll compressor 1C of the present embodiment differs from the third embodiment in the tooth height of the first scroll members 71 and 91 and the tooth height of the second scroll members 72 and 92. The other configuration is the same as that of the third embodiment, so the description will be omitted using the same reference numerals.
As shown in FIG. 15, the tooth height (wall height) of the first wall 71b, 92b is shorter than the tooth height of the second wall 72b, 92b. Therefore, the positions of the driven side end plates 91 a and 92 a are shifted from the center of the axial position of the scroll members 70 and 90 toward the motor 5.
The air discharged from the first scroll parts 71 and 91 is discharged from the discharge port 72 d on the second scroll parts 72 and 92 side. Therefore, when the compressed air is introduced from the first scroll portions 71 and 91 to the second scroll portions 72 and 92, a pressure loss occurs. Therefore, the tooth height of the first wall 71b, 91b is made smaller than that of the second wall 72b, 92b. Thus, the pressure loss can be reduced by reducing the flow rate of the air compressed by the first scroll portions 71 and 91.
Although the driven side end plates 91a and 92a shown in FIG. 14 are made of the same member, they may be made of separate members as shown in FIG.

  In the third to seventh embodiments described above, the pin ring mechanism 15 is used as the synchronous drive mechanism. However, the present invention is not limited to this, and may be, for example, a crank pin mechanism.

Eighth Embodiment
The eighth embodiment of the present invention will be described below with reference to FIG.
FIG. 16 shows a dual-rotation scroll compressor (scroll compressor) 1. The double-rotating scroll compressor 1 can be used, for example, as a turbocharger that compresses combustion air (fluid) supplied to an internal combustion engine such as a vehicle engine.

  The double-rotating scroll compressor 1 includes a housing 3, a motor (drive unit) 5 housed on one end side of the housing 3, and a drive-side scroll member 70 and a driven-side scroll member housed on the other end side of the housing 3. It has 90 and.

  The housing 3 has a substantially cylindrical shape, and includes a motor accommodating portion 3 a that accommodates the motor 5 and a scroll accommodating portion 3 b that accommodates the scroll members 70 and 90.

  Cooling fins 3c for cooling the motor 5 are provided on the outer periphery of the motor housing 3a. A discharge port 3d for discharging compressed air (working fluid) is formed at an end portion of the scroll housing portion 3b. Although not shown in FIG. 16, the housing 3 is provided with an air inlet for sucking air (working fluid).

  The motor 5 is driven by supplying power from a power supply source (not shown). The rotation control of the motor 5 is performed by a command from a control unit (not shown). The stator 5 a of the motor 5 is fixed to the inner peripheral side of the housing 3. The rotor 5b of the motor 5 rotates around the drive side rotation axis CL1. The drive shaft 6 extending on the drive side rotation axis line CL1 is connected to the rotor 5b. The drive shaft 6 is connected to the first drive side shaft 7 c of the drive side scroll member 70.

The drive side scroll member 70 includes a first drive side scroll portion 71 on the motor 5 side and a second drive side scroll portion 72 on the discharge port 3 d side.
The first drive side scroll portion 71 includes a first drive side end plate 71a and a first drive side wall 71b.
The first drive side end plate 71a is connected to a first drive side shaft 7c connected to the drive shaft 6, and extends in a direction orthogonal to the drive side rotational axis CL1. The first drive side shaft portion 7 c is provided rotatably with respect to the housing 3 via a first drive side bearing 11 formed as a ball bearing.

  The first drive side end plate 71a has a substantially disc shape in a plan view. A plurality of spiral first drive side walls 71b are provided on the first drive side end plate 71a. The first drive side wall bodies 71b are arranged at equal intervals around the drive side rotation axis line CL1.

The second drive side scroll portion 72 includes a second drive side end plate 72a and a second drive side wall 72b. Similar to the first drive side wall 71 b described above, a plurality of second drive side walls 72 b are provided in a spiral shape.
A cylindrical second drive side shaft portion 72c extending in the direction of the drive side rotation axis CL1 is connected to the second drive side end plate 72a. The second drive side shaft portion 72c is provided rotatably with respect to the housing 3 via a second drive side bearing 14 formed as a ball bearing. A discharge port 72d is formed in the second drive side end plate 72a along the drive side rotational axis CL1.

  Although not shown in the drawings, a thickness theft is provided on the surface of the first drive side end plate 71a and the second drive side end plate 72a, which is not shown, for the purpose of weight reduction.

  Two sealing members 16 are provided between the second drive side shaft portion 72c and the housing 3 on the tip end side (left side in FIG. 16) of the second drive side shaft portion 72c than the second drive side bearing 14 ing. The two seal members 16 and the second drive-side bearing 14 are disposed at predetermined intervals in the direction of the drive-side rotation axis CL1. A lubricant, for example, a grease which is a semisolid lubricant, is enclosed between the two seal members 16. The number of sealing members 16 may be one. In this case, the lubricant is enclosed between the seal member 16 and the second drive side bearing 14.

  The first drive side scroll portion 71 and the second drive side scroll portion 72 are fixed in a state in which the tips (free ends) of the wall bodies 71 b and 72 b face each other. Fixing of the first drive side scroll portion 71 and the second drive side scroll portion 72 is achieved by fastening bolts (walls fixed to a flange portion 73 provided at a plurality of places in the circumferential direction so as to protrude outward in the radial direction) Part 31).

In the driven scroll member 90, the driven end plate 90a is located substantially at the center in the axial direction (horizontal direction in the drawing). A through hole 90h is formed at the center of the driven end plate 90a, and compressed air flows to the discharge port 72d.
The first driven side wall body 91b is provided on one side surface of the driven side end plate 90a, and the second driven side wall body 92b is provided on the other side surface of the driven side end plate 90a. The first driven side wall body 91b installed on the motor 5 side from the driven side end plate 90a is engaged with the first drive side wall body 71b of the first drive side scroll portion 71, and on the discharge port 3d side from the driven side end plate 90a. The installed second driven side wall 92 b is engaged with the second driving side wall 72 b of the second driving scroll portion 72.

  The driven end plate 90a is not provided with the light theft as provided on the drive end plates 71a and 72a. This is because the driven side end plate 90a is a surface opposite to each of the tips of the drive side walls 71b and 72b, and both sides thereof form a compression chamber.

  A first support member 33 and a second support member 35 are provided at both ends of the driven scroll member 90 in the axial direction (horizontal direction in the drawing). The first support member 33 is disposed on the motor 5 side, and the second support member 35 is disposed on the discharge port 3 d side. The first support member 33 is fixed to the tip (free end) on the outer peripheral side of the first driven side wall 91 b by a bolt 34, and the second support member 35 is on the outer peripheral side of the second driven side wall 92 b It is fixed by a bolt 36 to the tip (free end). A shaft portion 33 a is provided on the central axis side of the first support member 33, and the shaft portion 33 a is fixed to the housing 3 via a first support member bearing 37. A shaft portion 35 a is provided on the central axis side of the second support member 35, and the shaft portion 35 a is fixed to the housing 3 via a second support member bearing 38. Thus, the driven scroll member 90 is configured to rotate around the driven center axis CL2 via the support members 33 and 35.

  A pin ring mechanism (synchronous drive mechanism) 15 is provided between the first support member 33 and the first drive side end plate 71a. That is, the rolling bearing (ring) is provided on the first drive side end plate 71 a, and the pin member 15 b is provided on the first support member 33. While the driving force is transmitted from the drive-side scroll member 70 to the driven-side scroll member 90 by the pin ring mechanism 15, both scroll members 70, 90 rotate at the same angular velocity in the same direction.

The drive side scroll member 70 is shown in FIG. As described above, in the drive-side scroll member 70, the first drive-side scroll portion 71 and the second drive-side scroll portion 72 are fixed by the bolts 31. The first drive side scroll portion 71 and the second drive side scroll portion 72 are made of materials having the same linear expansion coefficient, and specifically, an aluminum alloy is used. The bolt 31 is also preferably made of the same material as the scrolls 71 and 72, that is, an aluminum alloy.
Although not shown in the drawings, a thickness theft is provided on the surface of the first drive side end plate 71a and the second drive side end plate 72a, which is not shown, for the purpose of weight reduction.

In FIG. 18, the driven scroll member 90 and the support members 33 and 35 are shown. As described above, the driven scroll member 90 is fixed by the first support member 33 and the bolt 34, and is fixed by the second support member 35 and the bolt 36. The driven scroll member 90 and the support members 33 and 35 are made of a material having the same coefficient of linear expansion, and specifically, a magnesium alloy is used. The bolts 34 and 36 are also preferably made of the same material as the driven scroll member 90, that is, a magnesium alloy.
The driven end plate 90a is not provided with the light theft as provided on the drive end plates 71a and 72a. This is because the driven side end plate 90a is a surface opposite to each of the tips of the drive side walls 71b and 72b, and both sides thereof form a compression chamber.

The twin-rotating scroll compressor 1 configured as described above operates as follows.
When the drive shaft 6 is rotated about the drive-side rotation axis CL1 by the motor 5, the first drive-side shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive-side scroll member 70 is driven along the drive-side rotation axis CL1. Rotate around. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, when the pin member 15b of the pin ring mechanism 15 moves in contact with the inner circumferential surface of the circular hole, both scroll members 70, 90 rotate at the same angular velocity in the same direction.
When both scroll members 70, 90 rotate, the air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and the compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the through hole 90h formed in the driven side end plate 90a, and the second drive side wall 72b and the second driven side wall 92b The air that has been compressed is merged with the air that has been compressed, and the merged air passes through the discharge port 72 d and is discharged from the discharge port 3 d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

According to the present embodiment, the following effects are achieved.
Since the first drive-side scroll portion 71 and the second drive-side scroll portion 72 are made of a material (aluminum alloy) having the same linear expansion coefficient, deformation occurs due to a difference in thermal expansion when a temperature change occurs, causing stress And may not adversely affect compression performance. Further, since the first drive side scroll portion 71 and the second drive side scroll portion 72 are made of the same material (aluminum alloy), the reaction with water is caused by the difference in ionization tendency at the fixed contact portions with each other. It is possible to avoid the occurrence of electrolytic corrosion.

  Since the driven scroll member 90 and the support members 33 and 35 are made of a material (magnesium alloy) having the same linear expansion coefficient, when a temperature change occurs, the thermal expansion difference causes deformation and stress increases. There is no risk of adversely affecting compression performance. In addition, since the driven scroll member 90 and the support members 33 and 35 are made of the same material (magnesium alloy), electrolytic corrosion occurs due to the reaction with moisture due to the difference in ionization tendency at the fixed contact portions. Can be avoided.

  Further, the driven scroll member 90 is made of magnesium alloy, and a material having a specific gravity smaller than that of the aluminum alloy of the drive scroll member 70 is used. As a result, even with the driven scroll member 90 including the driven end plate 90a which can not be stolen, such as the drive end plates 71a and 72a, the weight can be reduced, and the rotational inertia force can be reduced. it can.

  In the present embodiment, a magnesium alloy is used for the driven scroll member 90 and the support members 33 and 35, but an aluminum alloy may be used.

[Ninth embodiment]
The ninth embodiment of the present invention will be described below. The schematic configuration of the dual-rotating scroll compressor according to the present embodiment is substantially the same as that of the eighth embodiment described with reference to FIG.
A plan view of the driven scroll member 90 is shown in FIG. The driven scroll member 90 is provided with three driven side wall bodies 91b (92b). A plurality of circular through holes 90a1 are formed in the driven side end plate 90a in the vicinity of the outer peripheral end 91e of the driven side wall 91b. Specifically, when the position of the outer peripheral end 91 e which is the winding end of the driven side wall 91 b is 0 °, 0 ° to −120 °, preferably 0 ° to the center of the spiral driven side wall 91 b. The through holes 90a1 are formed in the range of -90 °, more preferably 0 ° to -45 °. The negative angle means the center side (inner peripheral side) of the driven side wall body 91b. The shape of the through hole 90a1 may be changed to a circular shape, and may be another shape such as an ellipse or an oval, and the number may be one.

  Further, the through hole 90a1 is closer to the outer periphery side of the driven side wall body 91b by bringing the through hole 90a1 closer to the abdominal side 91f than the back side 91g opposed to the inner side 91f of the driven side wall body 91b. It is formed to be located.

  A notch 90a2 is formed in the driven side end plate 90a on the outer peripheral side (counterclockwise in FIG. 19) from the outer peripheral end 91e of the driven side wall 91b. That is, the driven side end plate 90a is missing on the outer peripheral side than the outer peripheral end 91e.

  FIG. 20 shows the meshing state of the driven scroll member 90 and the drive scroll member 70. And FIG. 21 shows a cross-sectional view taken along arrow B of FIG. As can be seen from FIG. 21, it can be seen that the compression chambers S1 on both sides of the driven end plate 90a communicate with each other because the notch 90a2 is provided. In the region where the notches 90a2 are provided, the drive side walls 71b and 72b are increased by a size corresponding to the thickness of the driven end plate 90a, and the tips of the drive side walls 71b and 72b are approximately the same. It is formed to abut.

  On the other hand, when the notch 90a2 is not provided, the driven side scroll member 90 and the drive side scroll member 70 mesh as shown in FIG. A cross-sectional view taken along arrow C of FIG. 22 is shown in FIG. As can be seen from FIG. 23, when the driven side end plate 90a is provided on the outer peripheral side of the outer peripheral end 91e of the driven side wall 91b, the compression chambers S1 and S1 are formed on both sides of the driven side end plate 90a. And each is an independent compression chamber S1.

  As can be understood by comparing FIGS. 23 and 21, the compression chamber S1 can be enlarged by the volume integral corresponding to the thickness of the driven side wall 91b in the case of FIG. 21 according to the present embodiment. Thereby, the effect that the compression ratio can be increased can be obtained.

The twin-rotating scroll compressor 1 configured as described above operates as follows.
When the drive shaft 6 is rotated about the drive-side rotation axis CL1 by the motor 5, the first drive-side shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive-side scroll member 70 is driven along the drive-side rotation axis CL1. Rotate around. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, when the pin member 15b of the pin ring mechanism 15 moves in contact with the inner circumferential surface of the circular hole, both scroll members 70, 90 rotate at the same angular velocity in the same direction.
When both scroll members 70, 90 rotate, the air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and the compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the discharge through hole 90h formed in the driven side end plate 90a, and the second drive side wall 72b and the second driven side wall 92b. , And the air after merging passes through the discharge port 72d and is discharged from the discharge port 3d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

According to the present embodiment, the following effects are achieved.
In the driven side end plate 90a, a through hole 90a1 and a notch 90a2 are formed in the vicinity of the outer peripheral end 91e of the driven side wall 91b. Thereby, pressure equalization can be performed by connecting the compression chambers S1 formed on both sides of the driven side end plate 90a, and the compression chambers on both sides merge at the discharge through hole 90h (see FIG. 1) before the air is discharged. It is possible to reduce the possibility of inhibiting the ejection.
In addition, the pressure difference between the compression chambers S1 on both sides can reduce the possibility that a thrust load is generated on the scroll members 70 and 90.

  Since the through holes 90a1 and the notches 90a2 are formed in the vicinity of the outer peripheral end 91e of the driven side wall 91b to reduce the weight of the outer peripheral side of the driven scroll member 90, the rotational inertia force of the driven scroll member 90 is small. can do. In particular, since the driven side end plate 90a faces the compression chamber on both sides, it can not be stolen as in the drive side end plates 71a and 72a, so weight reduction by the through hole 90a1 and the notch 90a2 is effective.

  Since the through holes 90a1 and the notches 90a2 are positioned in the vicinity of the outer peripheral end 91e of the driven side wall 91b, recompression can be reduced by pressure equalization before the pressure rises to a predetermined value or more.

  By forming the through hole 90a1 near the ventral side 91f of the driven side wall 91b, the through hole 90a1 can be positioned on the outer peripheral side as much as possible. Thereby, the rotational inertia force of the driven scroll member 90 can be further reduced.

  In the embodiment described above, both the through hole 90a1 and the notch 90a2 are provided, but any one of these may be adopted.

  Further, as shown in FIG. 24, even when the driven side end plate 90a is provided on the outer peripheral side of the outer peripheral end 91e without providing the notch 90a2 as shown in FIG. It is also possible to form 90a1.

Tenth Embodiment
The tenth embodiment of the present invention will be described below. The schematic configuration of the dual-rotating scroll compressor according to the present embodiment is substantially the same as that of the eighth embodiment described with reference to FIG.

<Surface treatment>
A metal is used as a base material of the drive side scroll member 70 and the driven side scroll member 90, and specifically, an aluminum alloy, a magnesium alloy, or an iron-based material is used. If the same kind of material is used for the drive side scroll member 70 and the driven side scroll member 90, there is a possibility that seizure will occur at the sliding portion, so surface treatment is performed. As surface treatment, electroless nickel phosphorus (Ni-P) plating is used, for example.

  The surface treatment is not applied to the drive side scroll member 70. That is, the metal of the base material is exposed on the surface of the drive scroll member 70.

  On the other hand, surface treatment is applied to the driven scroll member 90. Specifically, the surface treatment is applied to at least a region in contact with the drive side scroll member 70. However, the first driven side wall 91b and / or the second driven side wall 92b is π (rad) from the end of the winding of the first driven side wall 91b and / or the second driven side wall 92b. Alternatively, the surface treatment is not performed on the outer peripheral side of the range up to the angle divided by the number of the second driven side walls 92b. In the present embodiment, assuming that the number of lines of each of the driven side wall bodies 91b and 92b is 2, the surface treatment is not performed on the outer peripheral side of the range from the winding end to π / 2 (= 90 °). Specifically, as shown in FIG. 25, the surface treatment is not applied in the range from the winding end of the driven side wall 91 b (92 b) to 90 ° (the range indicated by a thick line). In this angle range, the outer peripheral surface (back surface) of the driven side wall body 91b (92b) is a region not in contact with the corresponding driving side wall body 71b (72b).

  When the surface treatment is performed, a region of the above-described angle range (90 ° from the end of winding of the driven side walls 91b and 92b) is held by a jig to fix the driven scroll member 90 at a predetermined position. In this state, processing such as electroless plating is performed.

The twin-rotating scroll compressor 1 configured as described above operates as follows.
When the drive shaft 6 is rotated about the drive-side rotation axis CL1 by the motor 5, the first drive-side shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive-side scroll member 70 is driven along the drive-side rotation axis CL1. Rotate around. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, when the pin member 15b of the pin ring mechanism 15 moves in contact with the inner circumferential surface of the circular hole, both scroll members 70, 90 rotate at the same angular velocity in the same direction.
When both scroll members 70, 90 rotate, the air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and the compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the discharge through hole 90h formed in the driven side end plate 90a, and the second drive side wall 72b and the second driven side wall 92b. , And the air after merging passes through the discharge port 72d and is discharged from the discharge port 3d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

According to the present embodiment, the following effects are achieved.
The surface treatment was not performed on the drive side scroll member 70, and the surface treatment was performed on the driven side scroll member 90 at least in the region in contact with the drive side scroll member 70. Thereby, even if the same metal material is used as a base material of the drive side scroll member 70 and the driven side scroll member 90, the burn-in can be avoided. In addition, since it is sufficient to surface-treat one driven-side scroll member 90 instead of surface-treating the first drive-side scroll portion 71 and the second drive-side scroll portion 72, cost can be reduced. It can be reduced. From the above, the cost can be reduced while maintaining the durability of the scroll member.
In addition, when the surface treatment is performed on two of the first drive side scroll portion 71 and the second drive side scroll portion 72, the film thickness formed by the surface treatment may differ from each other. If the film thickness is different, the gap (tip gap) between the driving side end plate 71a (72a) and the tip of the driven side wall members 91b and 92b may be different, which may adversely affect the compression performance. On the other hand, since the surface treatment is performed under the same conditions by performing the surface treatment on one driven side scroll member 90, the film thickness on both sides of the driven side end plate 90a can be made equal, and the tip clearance Can accurately manage

  In the range from the winding end of the driven side wall 91b (92b) to the angle obtained by dividing π (rad) by the number of walls provided on one end plate, the outer peripheral side (back of the driven side wall 91b (92b) Side does not contact the corresponding drive sidewall 71b (72b). Therefore, since it is not necessary to perform surface treatment in this angle range, this angle range can be made into the fixed position of the jig at the time of surface treatment. Specifically, at the time of surface treatment, the jig is fixed to this angle range to support the driven scroll member 90. Thus, the driven scroll member 90 can be stably supported and subjected to surface treatment. In addition, it is not necessary to provide the range which does not provide surface treatment over the whole of the above-mentioned angle range, and the area | region which fixes a jig | tool should just be made into a non-surface treatment area | region.

  In addition, as an area | region which does not perform surface treatment, it is good also as an inner peripheral surface of discharge through-hole 90h instead of the angle range mentioned above, or with the said angle range. The drive side wall 71b (72b) does not come in contact with the inner peripheral surface forming the discharge through hole 90h. Therefore, since it is not necessary to surface-treat the inner peripheral surface of discharge penetration hole 90h, the inner peripheral surface of discharge penetration hole 90h can be made into the fixed position of the jig at the time of surface treatment. Specifically, in the surface treatment, a rod-like jig is passed through the discharge through hole 90h, the jig is pressed against the inner peripheral surface of the discharge through hole 90h and fixed, and the driven scroll member 90 is supported. Thus, the driven scroll member 90 can be stably supported and subjected to surface treatment. Note that the range in which the surface treatment is not provided does not have to be provided over the entire inner peripheral surface of the discharge through hole 90 h, and the region to which the jig is fixed may be a non-surface treatment region.

  In each of the above-described embodiments, although a dual-rotating scroll compressor is used as a supercharger, the present invention is not limited to this, and any compressor that compresses fluid may be widely used. For example, it can be used as a refrigerant compressor used in an air conditioning machine. Moreover, it is also possible to apply the scroll type compressor 1 of this invention to the air control apparatus which utilized the force of the air as a brake system for rail vehicles.

1, 1A, 1B, 1C Double-Rotating Scroll Type Compressor 3 Housing 3a Motor Housing (First Housing)
3b Scroll housing (second housing)
3c Cooling fin 3d Discharge port 5 Motor (drive part)
5a Stator 5b Rotor 6 Drive Shaft 11 First Drive-side Bearing 14 Second Drive-side Bearing 14a Preload Member 15 Pin Ring Mechanism (Synchronous Drive Mechanism)
15a Ring member 15b Pin member 17 Rear end bearing 30 Flange part (fastening part)
31 bolt (wall fixing part)
32 bolt 33 first support member 33a first support member shaft 35 second support member 35a second support member shaft 37 first support member bearing (first follower side bearing)
38 Bearing for second support member (second driven side bearing)
70 drive side scroll member 71 first drive side scroll portion 71a first drive side end plate 71b first drive side wall 71b1 key groove portion 72 second drive side scroll portion 72a second drive side end plate 72b second drive side wall 72c second 2 Drive-side shaft portion 72d Discharge port 72e End of winding portion 73 Flange portion 74 Key member 90 Drive-side scroll member 90a Drive-side end plate 90h Through hole 91b First driven sidewall 92b Second driven sidewall CL1 Drive-side rotation axis CL2 Side rotation axis P Division plane S1 Compression chamber

The driven scroll member 90 has a driven end plate 90a provided substantially at the center in the axial direction (horizontal direction in the figure). A through hole 90h is formed at the center of the driven end plate 90a, and compressed air flows to the discharge port 72d.
The driven side walls 91b and 92b are provided on both sides of the driven end plate 90a. The first driven side wall body 91b installed on the motor 5 side from the driven side end plate 90a is engaged with the first drive side wall body 71b of the first drive side scroll portion 71, and on the discharge port 3d side from the driven side end plate 90a. The installed second driven side wall 92 b is engaged with the second driving side wall 72 b of the second driving scroll portion 72.
First driven side walls 91b are two, that is, provided two rows. The two driven side wall bodies 91b are arranged at equal intervals around the driven side rotation axis CL2. The second driven side wall 92b has a similar configuration. The number of the driven side walls 91b and 92b may be one or three or more.

The housing 3 is a substantially cylindrical shape, and includes a motor housing portion 3a for accommodating the motor 5, and a scroll housing portion 3b for housing the scroll member 7 0, 9 0.
Cooling fins 3c for cooling the motor 5 are provided on the outer periphery of the motor housing 3a. At the end of the scroll housing portion 3b, a discharge port 3d for discharging the compressed air is formed. Although not shown in FIG. 8, the housing 3 is provided with an air intake port for sucking air.
The scroll housing portion 3b of the housing 3 is divided at a division plane P located substantially at the center of the scroll members 70, 90 in the axial direction. The housing 3 is provided with a flange portion (not shown) that protrudes outward at a predetermined position in the circumferential direction. The division surface P is fastened by fixing to this flange portion through a bolt or the like as a fastening means.

The motor 5 is driven by supplying power from a power supply source (not shown). The rotation control of the motor 5 is performed by a command from a control unit (not shown). The stator 5 a of the motor 5 is fixed to the inner peripheral side of the housing 3. The rotor 5b of the motor 5 rotates around the drive rotation axis CL1. The drive shaft 6 extending on the drive rotation axis CL1 is connected to the rotor 5b. The drive shaft 6 is connected to the drive side shaft portion 7 c of the drive side scroll member 70.

The drive side scroll member 70 includes a first drive side scroll portion 71 on the motor 5 side and a second drive side scroll portion 72 on the discharge port 3 d side.
The first drive side scroll portion 71 includes a first drive side end plate 71a and a first drive side wall 71b.
The first drive side end plate 71a is connected to the drive side shaft 7c connected to the drive shaft 6, and extends in a direction orthogonal to the drive side rotation axis CL1. The drive side shaft portion 7 c is provided rotatably with respect to the housing 3 via a first drive side bearing 11 formed as a ball bearing.

Fourth Embodiment
Next, a fourth embodiment of the present invention will be described using FIG.
In the present embodiment, the discharge timings of the air compressed by the first scroll units 71 and 91 and the second scroll units 72 and 92 are different. The other configuration is the same as that of the third embodiment, and thus the description will be omitted while referring to FIGS. 8 to 10.
The first wall 71b, 72b and the second wall 91b, 92b have different shapes. Specifically, the second walls 91 b and 92 b are shifted from the first walls 71 b and 72 b around the symmetry centers of the respective walls. Thus, the timing at which the air is compressed and discharged by the first scroll portions 71 and 91 is different from the timing at which the air is compressed and discharged to the second scroll portions 71 and 92.

Fifth Embodiment
Next, a fifth embodiment of the present invention will be described using FIG. 12 and FIG.
In the present embodiment, the discharge pressures of the air compressed by the first scroll portions 71 and 91 and the second scroll portions 72 and 92 are different. The other configuration is the same as that of the third embodiment, and thus the description will be omitted while referring to FIGS. 8 to 10.
The first wall 71b, 72b and the second wall 91b, 92b have different shapes. Specifically, the number of turns of the first wall 71b, 72b is made larger than the number of turns of the second wall 91b, 92b. As a result, the discharge pressure of the air compressed by the first scroll portions 71 and 91 is higher than the discharge pressure of the air compressed by the second scroll portions 72 and 92.

Specifically, as shown in FIG. 12B, the air compressed by the first scroll portions 71 and 91 (curve L1) has a discharge pressure higher than the air compressed by the second scroll portions 72 and 92 (curve L2). Is high. Thus, by making the discharge pressure of the first scroll portions 71, 91 higher than that of the second scroll portions 72, 92, as shown in FIG. 13B, the air flowing out of the first scroll portions 71, 91 After flowing into the second scroll portion 72, 92, it flows smoothly toward the discharge port 72d.
On the other hand, as shown in FIG. 12A, when the discharge pressure relationship is reverse, that is, when the discharge pressure of the second scroll portions 72 and 92 is larger than that of the first scroll portions 71 and 91, as shown in FIG. The discharge air flows back from the second scroll portions 72 and 92 to the first scroll portions 71 and 91, and the discharge air from the first scroll portions 71 and 91 can flow smoothly toward the discharge port 72d. Can not.

Sixth Embodiment
Next, a sixth embodiment of the present invention will be described using FIG.
The double-rotating scroll compressor 1B of the present embodiment differs from the third embodiment in the tooth height of the first scroll members 71 and 91 and the tooth height of the second scroll portions 72 and 92. The other configuration is the same as that of the third embodiment, so the description will be omitted using the same reference numerals.
As shown in FIG. 14, the first wall 71b, 91 b tooth depth of (wall height) is longer than the tooth height of the second wall 72b, 92b. Therefore, the positions of the driven side end plates 91 a and 92 a are shifted from the center of the axial position of the scroll members 70 and 90 toward the discharge port 3 d.
In the present embodiment, the pinning mechanism 15 is provided on the first drive side end plate 71 a to transmit the driving force to the driven scroll member 90, so that the first drive side scroll portion 71 of the second drive side scroll portion 72 is It is configured to be more rigid. Therefore, when the rigidity of the first drive side scroll portion 71 is larger than that of the second drive side scroll portion 72, the tooth length of the first drive side wall 71b is increased to relatively increase the second drive side wall 72b. The rigidity of the second drive side scroll portion can be enhanced by shortening the tooth height of the second drive side scroll portion.
Although the driven side end plates 91a and 92a shown in FIG. 14 are made of the same member, they may be made of separate members as shown in FIG.

Seventh Embodiment
Next, a seventh embodiment of the present invention will be described using FIG.
The double-rotating scroll compressor 1C of the present embodiment differs from the third embodiment in the tooth height of the first scroll members 71 and 91 and the tooth height of the second scroll portions 72 and 92. The other configuration is the same as that of the third embodiment, so the description will be omitted using the same reference numerals.
As shown in Figure 15, the first wall 71b, 91 b tooth depth of (wall height) is smaller than the tooth height of the second wall 72b, 92b. Therefore, the positions of the driven side end plates 91 a and 92 a are shifted from the center of the axial position of the scroll members 70 and 90 toward the motor 5.
The air discharged from the first scroll parts 71 and 91 is discharged from the discharge port 72 d on the second scroll parts 72 and 92 side. Therefore, when the compressed air is introduced from the first scroll portions 71 and 91 to the second scroll portions 72 and 92, a pressure loss occurs. Therefore, the tooth height of the first wall 71b, 91b is made smaller than that of the second wall 72b, 92b. Thus, the pressure loss can be reduced by reducing the flow rate of the air compressed by the first scroll portions 71 and 91.
Although the driven side end plates 91a and 92a shown in FIG. 14 are made of the same member, they may be made of separate members as shown in FIG.

Eighth Embodiment
The eighth embodiment of the present invention will be described below with reference to FIG.
Figure 16 is the two rotating scroll compressor (scroll compressor) 1 D is shown. Two rotary scroll compressor 1 D can be used, for example, as a supercharger for compressing combustion air (fluid) supplied to the internal combustion engine such as an engine for a vehicle.

The double-rotating scroll compressor 1 D includes a housing 3, a motor (drive unit) 5 housed on one end side of the housing 3, a drive-side scroll member 70 housed on the other end side of the housing 3, and a driven-side scroll And a member 90.

1 D two rotating scroll compressor of the above construction operates as follows.
When the drive shaft 6 is rotated about the drive-side rotation axis CL1 by the motor 5, the first drive-side shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive-side scroll member 70 is driven along the drive-side rotation axis CL1. Rotate around. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, when the pin member 15b of the pin ring mechanism 15 moves in contact with the inner circumferential surface of the circular hole, both scroll members 70, 90 rotate at the same angular velocity in the same direction.
When both scroll members 70, 90 rotate, the air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and the compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the through hole 90h formed in the driven side end plate 90a, and the second drive side wall 72b and the second driven side wall 92b The air that has been compressed is merged with the air that has been compressed, and the merged air passes through the discharge port 72 d and is discharged from the discharge port 3 d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

1 D two rotating scroll compressor of the above construction operates as follows.
When the drive shaft 6 is rotated about the drive-side rotation axis CL1 by the motor 5, the first drive-side shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive-side scroll member 70 is driven along the drive-side rotation axis CL1. Rotate around. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, when the pin member 15b of the pin ring mechanism 15 moves in contact with the inner circumferential surface of the rolling bearing , both scroll members 70, 90 rotate at the same angular velocity in the same direction.
When both scroll members 70, 90 rotate, the air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and the compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the discharge through hole 90h formed in the driven side end plate 90a, and the second drive side wall 72b and the second driven side wall 92b. , And the air after merging passes through the discharge port 72d and is discharged from the discharge port 3d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

1 D two rotating scroll compressor of the above construction operates as follows.
When the drive shaft 6 is rotated about the drive-side rotation axis CL1 by the motor 5, the first drive-side shaft 7c connected to the drive shaft 6 is also rotated, whereby the drive-side scroll member 70 is driven along the drive-side rotation axis CL1. Rotate around. When the drive side scroll member 70 rotates, the drive force is transmitted from the support members 33 and 35 to the driven side scroll member 90 through the pin ring mechanism 15, and the driven side scroll member 90 rotates around the driven side rotation axis CL2. Do. At this time, when the pin member 15b of the pin ring mechanism 15 moves in contact with the inner circumferential surface of the rolling bearing , both scroll members 70, 90 rotate at the same angular velocity in the same direction.
When both scroll members 70, 90 rotate, the air sucked from the suction port of housing 3 is drawn from the outer peripheral side of both scroll members 70, 90, and the compression chamber formed by both scroll members 70, 90 Incorporated into The compression chamber formed by the first drive side wall 71b and the first driven side wall 91b and the compression chamber formed by the second drive side wall 72b and the second driven side wall 92b are separately compressed. Ru. The volume of each compression chamber decreases as it moves toward the center, and the air is compressed accordingly. The air compressed by the first drive side wall 71b and the first driven side wall 91b passes through the discharge through hole 90h formed in the driven side end plate 90a, and the second drive side wall 72b and the second driven side wall 92b. , And the air after merging passes through the discharge port 72d and is discharged from the discharge port 3d of the housing 3 to the outside. The discharged compressed air is led to an internal combustion engine (not shown) and used as combustion air.

1, 1A, 1B, 1C , 1D Double-Rotating Scroll Type Compressor 3 Housing 3a Motor Housing (First Housing)
3b Scroll housing (second housing)
3c Cooling fin 3d Discharge port 5 Motor (drive part)
5a Stator 5b Rotor 6 Drive Shaft 11 First Drive-side Bearing 14 Second Drive-side Bearing 14a Preload Member 15 Pin Ring Mechanism (Synchronous Drive Mechanism)
15a Ring member 15b Pin member 17 Rear end bearing 30 Flange part (fastening part)
31 bolt (wall fixing part)
32 bolt 33 first support member 33a first support member shaft 35 second support member 35a second support member shaft 37 first support member bearing (first follower side bearing)
38 Bearing for second support member (second driven side bearing)
70 drive side scroll member 71 first drive side scroll portion 71a first drive side end plate 71b first drive side wall 71b1 key groove portion 72 second drive side scroll portion 72a second drive side end plate 72b second drive side wall 72c second 2 Drive-side shaft portion 72d Discharge port 72e End of winding portion 73 Flange portion 74 Key member 90 Drive-side scroll member 90a Drive-side end plate 90h Through hole 91b First driven sidewall 92b Second driven sidewall CL1 Drive-side rotation axis CL2 Side rotation axis P Division plane S1 Compression chamber

Claims (15)

A drive side scroll member having a spiral drive side wall body rotationally driven by the drive unit and disposed on the drive side end plate;
A driven side scroll member having a spiral driven side wall corresponding to the drive side wall disposed on the driven side end plate, the driven side wall being engaged with the drive side wall to form a compression space; ,
A synchronous drive mechanism for transmitting driving force from the drive-side scroll member to the driven-side scroll member so that the drive-side scroll member and the driven-side scroll member rotate at the same angular velocity in the same direction;
Equipped with
The drive side scroll member has a first drive side end plate and a first drive side wall body, and a first drive side scroll portion driven by the drive unit, a second drive side end plate and a second drive side wall A second drive side scroll portion having a body, and a wall fixing portion fixed in a state in which tips of the first drive side wall body and the second drive side wall body in the rotational axis direction face each other,
The driven-side scroll member is provided on one side of the driven-side end plate, and is provided on a first driven-side wall that meshes with the first drive-side wall and on the other side of the driven-side end plate. And a second driven side wall meshing with the side wall.   The wall fixing portion is provided with a key groove portion provided at each of an end of the first drive side wall and an end of the second drive side wall, and a key member inserted into the key groove. The twin-rotating scroll compressor according to 1.   The wall fixing portion includes a groove portion provided at any one of the tip of the first drive sidewall and the tip of the second drive sidewall, the tip of the second drive sidewall, and the first drive sidewall. 2. The both-rotating scroll compressor according to claim 1, further comprising: a convex portion provided on the other of the tips of the two and inserted into the groove. A first driven side scroll member having a first driven side end plate and a first driven side wall member provided on one side surface of the first driven side end plate and engaged with the first drive side wall body; A second driven side scroll plate having a second driven side end plate and a second driven side wall body provided on one side surface of the second driven side end plate and meshing with the second drive side wall body;
The dual-rotating scroll compressor according to claim 1, wherein the first driven end plate and the second driven end plate are fixed so that their respective other side surfaces are overlapped.   The dual rotation scroll compressor according to claim 1, wherein the timing at which the fluid is compressed and discharged in the first drive side scroll portion is different from the timing at which the fluid is compressed and discharged in the second drive side scroll portion. The second drive side scroll portion is provided with a discharge port for discharging the fluid compressed by the second drive side scroll portion together with the fluid compressed by the first drive side scroll portion.
The dual-rotating scroll compressor according to claim 1, wherein the discharge pressure of the fluid compressed by the first drive side scroll portion is higher than the discharge pressure of the fluid compressed by the second drive side scroll portion. .   2. The rotary scroll compressor according to claim 1, wherein a wall height of the first driving side wall is larger than a wall height of the second driving side wall. The second drive side scroll portion is provided with a discharge port for discharging the fluid compressed by the second drive side scroll portion together with the fluid compressed by the first drive side scroll portion.
2. The rotary scroll compressor according to claim 1, wherein a wall height of the first driving side wall is smaller than a wall height of the second driving side wall. A first support member which is disposed with the first drive side end plate interposed therebetween, is fixed to a tip end side in the axial direction of the first driven side wall body, and rotates with the first driven side wall body;
A second support member disposed between the second driving side end plates and fixed to a tip end side in an axial direction of the second driven side wall body, and rotating with the second driven side wall body;
Equipped with
The first drive side scroll portion and the second drive side scroll portion are made of materials having the same linear expansion coefficient, and / or the driven side scroll member, the first support member, and the second support member are The twin-rotating scroll compressor according to claim 1, wherein the compressor is made of a material having the same coefficient of linear expansion.   10. The double-turning scroll type according to claim 9, wherein the material used for the driven-side scroll member is a material having a smaller specific gravity than the material used for the first drive-side scroll portion and the second drive-side scroll portion. Compressor.   The both-rotations scroll type compressor according to claim 1, wherein a through hole or a notch is formed in the vicinity of an outer peripheral end of the driven side wall body in the driven side end plate.   12. The rotary scroll compressor according to claim 11, wherein the through hole is formed at a position close to the ventral side of the driven side wall. The drive side scroll member is not subjected to surface treatment,
The both-rotations scroll type compressor according to claim 1, wherein the driven scroll member is surface-treated at least in a region in contact with the drive scroll member. A plurality of the drive side wall bodies are disposed at predetermined angular intervals around the center of the drive side end plate,
The driven side walls are disposed at a predetermined angular interval around the center of the driven side plate and a number corresponding to each driving side wall is disposed.
The first driven side wall and / or the second driven side wall is π (rad) from the end of the winding of the first driven side wall and / or the second driven side wall. The twin-rotating scroll compressor according to claim 13, wherein the surface treatment is not performed on the outer peripheral side of the range up to the angle divided by the number of second driven side walls. A through hole is provided at the center of the driven end plate,
The both-rotations scroll type compressor according to claim 13 or 14, wherein the surface treatment is not provided on an inner circumferential surface forming the through hole.

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