JP5500566B2 - Scroll type fluid machinery - Google Patents

Description

  The present invention relates to a structure of a scroll part of a scroll type fluid machine such as a scroll type compressor, and more particularly to a rotation prevention mechanism of a movable scroll and a scroll part structure related thereto.

  In a scroll type fluid machine, a fixed scroll and a movable scroll that is swung in a state where rotation is prevented from meshing with each other mesh with each other to form a fluid pocket. In a compressor, a fluid pocket is moved in a radial direction. By reducing the volume, the expander expands the volume while moving the fluid pocket in the radial direction, thereby compressing or expanding the fluid. In such a scroll type fluid machine, the movable scroll needs to be swung in a state in which rotation is prevented. To prevent rotation, a coupling, pin & pin called ball coupling or EM coupling is required. Techniques using ring coupling and pin & link coupling are known. However, the coupling itself has a natural turning radius, and these cannot be completely matched with the movable scroll turning radius and the locus determined by the scroll wall.

  On the other hand, there is also known a technique using a coupling called Oldham coupling for preventing the rotation of the movable scroll. Although this Oldham coupling does not have an inherent turning radius, there is vibration due to reciprocating motion. Since the distance between the bearing of the movable scroll and the bearing provided in the housing is increased by the thickness of the ring, the moment load on the bearing also increases, and is therefore unsuitable for speeding up.

  Patent Document 1 discloses a structure in which the movable scroll swings like a swing by the rotation of the crankshaft, but it is difficult to achieve a balance and is not suitable for speeding up.

Further, Patent Document 2, Patent Document 3, Patent Document 4, and Patent Document 5 disclose structures in which the rotation of the movable scroll is prevented by a groove provided on the movable scroll bottom plate and a pin provided on the housing. .
Japanese Patent No. 2751318 Japanese Patent No. 3874018 Japanese Patent No. 3976070 Japanese Patent No. 3976081 Japanese Patent No. 4013992

  However, in the rotation prevention mechanism having its own natural turning radius as described above, the performance and durability of the fluid machine are lowered due to the deviation from the turning radius of the movable scroll and the position deviation from the locus of the movable scroll. There was a risk of noise and vibration.

  Further, the Oldham coupling is not suitable for speeding up as described above, and a space for installing the Oldham coupling is required, so that it is difficult to reduce the size.

  Further, the rotation prevention mechanism described in Patent Document 1 is not suitable for high speed as described above, and it is difficult to reduce the size.

  Furthermore, in the rotation prevention mechanisms described in Patent Documents 2 to 5, although the degree of increase or decrease of the scroll wall thickness from the center of the movable scroll toward the outer periphery is not considered, the scroll wall thickness is usually reduced for downsizing or the like. If the scroll wall thickness changes excessively, it becomes difficult to mount the tip seal provided on the scroll front end surface, and it becomes difficult to ensure stable performance. In addition, there is no measure for the angular deviation of the spiral, and depending on the dimensional variation, there is a concern about adverse effects on performance and vibration noise.

  Further, in the rotation preventing mechanisms described in these Patent Documents 2 to 5, the movable scroll is a mechanism that is permitted to perform a revolving motion with a swing motion of 180 degrees worst. Normally, the scroll wall is formed in a state of being sandwiched between spiral curves having a phase difference of 90 degrees or less. However, in the above-mentioned patent having a large swing motion angle, there is a risk of deviating from the region. Walls may not be formed.

  The problem of the present invention is to pay attention to each problem in the various conventional rotation prevention mechanisms as described above, without having its own natural turning radius, and can be easily assembled with high accuracy in the target assembly state, Stable and high productivity, quietness and performance are obtained, and since there is no rotation prevention part between the movable scroll and the housing, it can be easily downsized especially in the axial direction, thereby achieving weight reduction. In addition, the scroll type fluid machine having a movable scroll rotation prevention mechanism that can easily obtain a desired fixed scroll wall profile capable of suppressing the swinging motion angle of the movable scroll and performing an appropriate seal. Is to provide.

  In addition, it is possible to lubricate a specific part of the orbiting scroll rotation prevention mechanism where lubrication is considered desirable by effectively using the lubricating oil circulation path for the entire scroll type fluid machine. In addition, it is possible to contribute to improving the performance of the scroll type fluid machine and improving the performance of the entire system incorporating the scroll type fluid machine by circulating the lubricating oil in a desirable form. This is an object of the present invention.

In order to solve the above problems, a scroll type fluid machine according to the present invention has, as a first form, a fixed scroll, a movable scroll that meshes with the fixed scroll and forms a fluid pocket that moves in the scroll radial direction, A crankshaft that engages the movable scroll to drive the movable scroll, and a housing provided with a bearing that supports the crankshaft, and the fixed scroll is fixed by driving torque transmitted through the crankshaft. In a scroll type fluid machine that revolves with respect to a scroll, the fixed scroll and the housing constitute a non-orbiting member, and extends over at least one of the fixed scroll and the housing constituting the non-orbiting member and the movable scroll. Prevention of rotation Provided with a timber, to the free-rolling preventing member, a rotation-preventing member moving mechanism that rotation-preventing member to permit movement of the rotation-preventing member itself required to permit the orbiting motion of the movable scroll is provided, the rotation-preventing member A member fixed to the outer peripheral portion of the movable scroll and extending radially outward from the outer peripheral portion of the movable scroll, wherein the rotation preventing member movable mechanism is provided on at least one of the fixed scroll and the housing, A rotating body space having an axis parallel to the shaft main shaft portion, and a rotating body rotatably fitted in the rotating body space and slidably holding the rotation preventing member. The back surface slides with the housing to form a drive mechanism housing space for the crankshaft that is partitioned from the suction chamber. And lubricating oil passage capable of supplying lubricating oil is provided in the drive mechanism housing space from, from those, characterized in that said lubricating oil passage is formed through the rotating body space Become.
Further, as a second form, the scroll type fluid machine according to the present invention includes a fixed scroll, a movable scroll that meshes with the fixed scroll and forms a fluid pocket that moves in the scroll radial direction, and engages with the movable scroll. And a housing provided with a crankshaft for driving the movable scroll and a bearing for supporting the crankshaft, and the movable scroll is turned with respect to the fixed scroll by a driving torque transmitted through the crankshaft. In the scroll type fluid machine, the fixed scroll and the housing constitute a non-orbiting member, and extends over at least one of the fixed scroll and the housing constituting the non-orbiting member and the movable scroll to prevent the rotation of the movable scroll. While providing a blocking member A rotation preventing member movable mechanism is provided for the rotation preventing member, the rotation preventing member allowing movement of the rotation preventing member itself, which is necessary for the rotation preventing member to allow the orbiting movement of the movable scroll, and the rotation preventing member is disposed on the movable scroll. The rotating scroll engaging member is rotatably engaged with the outer peripheral portion and extends radially outward from the outer peripheral portion of the movable scroll, and the rotation preventing member moving mechanism is provided on at least one of the fixed scroll and the housing, and the crank The crank that extends in a direction orthogonal to the main shaft portion of the shaft and includes a reciprocating sliding hole that slidably holds the rotation-preventing member, and the rear surface of the movable scroll slides with the housing and is partitioned from the suction chamber. A drive mechanism housing space for the shaft is formed, and lubricating oil can be supplied to the drive mechanism housing space from an oil reservoir below the discharge chamber. Lubricating oil passage is provided, consisting of those wherein the said lubricating oil path is formed via the reciprocating slide hole.

  In the scroll type fluid machine according to the present invention, as a first form, the rotation preventing member is fixed to the outer peripheral portion of the movable scroll and extends from the outer peripheral portion of the movable scroll toward the radially outer side. The rotation preventing member movable mechanism is provided in at least one of the fixed scroll and the housing, and has a rotating body space having an axis parallel to the crankshaft main shaft portion, and is rotatably fitted in the rotating body space. It is possible to adopt a configuration in which the blocking member is configured to include a rotating body that slidably holds the blocking member. The rotation prevention member is made of, for example, a flat plate-like member, and is configured integrally with, for example, a scroll wall of a movable scroll. If the rotation preventing member moves in the rotational direction of the movable scroll, the rotation of the movable scroll is prevented. At the same time, the movable scroll must perform the orbiting motion, so that the orbiting motion is allowed. Also, the rotation preventing member must be allowed to move in the swinging direction and the sliding direction. In order to allow the rotation preventing member itself to move, a rotation preventing member movable mechanism is provided, and a configuration constituted by the rotating body space and the rotating body as described above can be adopted. More specifically, the rotating body is configured to slidably hold the rotation prevention member between the opposed flat bottom surfaces in a pair of two columnar shoes each having an arc surface and a flat bottom surface. Can be formed from

  Further, in the scroll type fluid machine according to the present invention, in order to properly regulate the movement of the rotation preventing member by the rotating body and the rotating body space, and to reliably prevent the rotation of the movable scroll through it, It is preferable that the distance from the axis of the rotating body space to the axis of the main shaft of the crankshaft is set to be 1.5 times or more and 15 times or less the turning radius of the movable scroll.

  In a more specific design, the rotating body space is a cylindrical space having a diameter D1, and the thickness of the maximum thickness portion on the basis of the flat bottom surface of one of the columnar shoes is T1, and the flat bottom surface of the other columnar shoe is Preferably, the thickness is set so as to satisfy the relationship of D1> T1 + T2 + Ts where T2 is the thickness of the maximum thickness portion based on the above and Ts is the thickness of the rotation prevention member. Accordingly, the pair of columnar shoes can smoothly perform a desired movement as the rotating body while holding the rotation preventing member slidably.

  Further, in the scroll type fluid machine according to the present invention, it is possible to effectively use the lubricating oil circulation structure in the scroll type fluid machine previously proposed by the present applicant in Japanese Patent Application No. 2008-83834. That is, the back of the movable scroll slides with the housing to form a drive mechanism housing space for the crankshaft partitioned from the suction chamber, and lubricates the drive mechanism housing space from the oil reservoir below the discharge chamber. It is possible to adopt a structure in which a lubricating oil path capable of supplying oil is provided (so far, the previous proposal), and the lubricating oil path is formed via the rotating body space. is there. Circulating and supplying lubricating oil from the oil reservoir below the discharge chamber to the drive mechanism housing space of the crankshaft improves the lubricity of this drive mechanism while improving the substantial volume efficiency of the fluid machine, It is possible to improve the heat exchange efficiency of this fluid machine built-in system by reducing the outflow amount of the lubricating oil to the outside of the fluid machine, and further reduce the power of the fluid machine and system by reducing the pressure loss in the piping. And since this lubricating oil path | route is formed via a rotary body space, a rotary body and a rotation prevention member part are lubricated favorably, and a smoother operation | movement is attained.

  Further, in the scroll type fluid machine according to the present invention, the mechanism of the present invention can be easily applied when the crankshaft main shaft portion is arranged in the horizontal direction in the operating posture, and the mechanism of the present invention is particularly applicable. Oil path is easy to form. Further, the position of the rotation prevention member and the rotating body space is not particularly limited, but when the rotating body space is arranged above or below the fixed scroll, it is easy to design the turning posture of the movable scroll, It is easy to design the lubricating oil path.

  In the scroll type fluid machine according to the present invention, as a second mode, the rotation preventing member is rotatably engaged with the outer peripheral portion of the movable scroll, and radially outward from the outer peripheral portion of the movable scroll. A reciprocating slide comprising a member extending, wherein the rotation preventing member movable mechanism is provided in at least one of the fixed scroll and the housing and extends in a direction orthogonal to the crankshaft main shaft portion so as to slidably hold the rotation preventing member. A structure composed of holes can also be used. That is, the rotation preventing member that is rotatably engaged with the movable scroll side is slidably held in the reciprocating sliding hole formed on the fixed member side. Such a structure also prevents rotation of the movable scroll while ensuring a predetermined orbiting motion of the movable scroll.

  In the second embodiment, since the rotation prevention operation is appropriately performed, the rotation engagement portion of the rotation prevention member to the outer peripheral portion of the movable scroll is the crankshaft in the movable scroll. It is preferable that the distance to the axis of the main shaft is set at a location that is 1.5 times or more the turning radius of the movable scroll.

  Also in this second embodiment, it is possible to effectively utilize the lubricating oil circulation structure in the scroll type fluid machine previously proposed by the present applicant in Japanese Patent Application No. 2008-83834. That is, the back of the movable scroll slides with the housing to form a drive mechanism housing space for the crankshaft partitioned from the suction chamber, and lubricates the drive mechanism housing space from the oil reservoir below the discharge chamber. It is possible to employ a configuration in which a lubricating oil path capable of supplying oil is provided and the lubricating oil path is formed via the reciprocating sliding hole.

  Also in the second embodiment, the mechanism of the present invention is easy to apply when the crankshaft main shaft portion is a horizontal scroll fluid machine arranged in the horizontal direction in the operating position, and in particular, the lubricating oil path is Easy to form.

  Further, in the scroll type fluid machine according to the present invention including the first and second embodiments, the bearing center on the back of the movable scroll and the origin of the spiral curve forming the scroll wall coincide with each other. It is preferable to adopt a structure in which the center of the main shaft portion of the crankshaft rotatably supported by the bearing of the housing coincides with the origin of the spiral curve forming the scroll wall of the fixed scroll. If it does in this way, it can prevent that the scroll wall of the other party becomes thin too much.

  In the scroll type fluid machine according to the present invention, a bush integrated with the counterweight is interposed between the crankpin of the crankshaft and the bearing on the back of the movable scroll, whereby torque from the crankpin is transferred to the movable scroll. It is preferable that the centrifugal force of the movable scroll be offset and reduced at the same time as the signal is transmitted. Accordingly, a driven crank mechanism that can cope with variations in the shape and position of the scroll wall is configured, and productivity can be increased, and the efficiency of the fluid machine can be increased by improving the scroll wall sealing performance.

  Furthermore, in the scroll type fluid machine according to the present invention, it is preferable that one or both of scroll walls of the movable scroll and the fixed scroll have a thickness that decreases outward. That is, the thickness of the scroll wall is not repeatedly increased and decreased, and the thickness is reduced in one way. As a result, it becomes possible to further reduce the size and weight.

  According to the scroll type fluid machine of the present invention, the rotation preventing member of the movable scroll extending between the movable scroll side and the fixed member side, and the rotation preventing member necessary for allowing the rotation preventing member to orbit the scroll. By providing a rotation prevention member movable mechanism that allows its own movement, it is possible to realize a rotation prevention mechanism for a movable scroll that does not have its own natural turning radius and can be easily assembled with high accuracy in the target assembly state. The entire fluid machine including this rotation prevention mechanism can stably obtain high productivity, quietness and performance. In addition, since there is no rotation blocking portion between the movable scroll and the housing in the axial direction, it can be easily reduced in size particularly in the axial direction, thereby achieving weight reduction. Furthermore, since the swinging motion angle of the movable scroll can be kept small, a desired fixed scroll wall profile capable of performing appropriate sealing can be easily obtained.

  Further, by utilizing the lubricating oil circulation structure in the scroll type fluid machine previously proposed by the present applicant in Japanese Patent Application No. 2008-83834 for the rotation prevention mechanism, the rotation prevention mechanism can be operated more smoothly. It can be ensured, and the lubricating oil can be circulated to the crankshaft drive mechanism side in a desirable form to contribute to the performance improvement of the entire scroll type fluid machine and the performance of the entire system incorporating the scroll type fluid machine. become.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 show an embodiment of the first aspect of the present invention described above. In the figure, 1 indicates the entire scroll type fluid machine. The scroll fluid machine 1 includes a fixed scroll 2, a movable scroll 3 that meshes with the fixed scroll 2 and forms a fluid pocket 4 that moves in the scroll radial direction, and engages with the movable scroll 3 to move the movable scroll 3. A crankshaft 5 to be driven and a housing 7 provided with a bearing 6 for supporting the crankshaft 5 are provided. The crankshaft 5 has a crankpin 8 at an eccentric portion, and the movable scroll 3 is cranked by the crankpin 8, an eccentric bush 9 in which the crankpin 8 is rotatably fitted, and a drive torque transmitted via a bearing 10. The main shaft portion 5a of the shaft 5 is pivoted with respect to the fixed scroll 2. The scroll type fluid machine 1 can function as a compressor by moving the fluid pocket 4 in the central direction while reducing the volume, and conversely, the expander by moving toward the radially outer side while increasing the volume. Can function as. In this embodiment, a case where the apparatus functions as a scroll compressor will be described.

  A fluid (for example, a refrigerant) sucked into the suction chamber 11 is compressed by a scroll mechanism including the fixed scroll 2 and the movable scroll 3, and then is discharged into the discharge chamber 13 through a discharge hole 12 provided at the center of the fixed scroll 2. The compressed fluid is sent to the external circuit through the discharge port 14 from there. An oil sump 15 for separating and storing the lubricating oil contained in the fluid (for example, refrigerant) is formed in the lower part of the discharge chamber 13. The crankshaft 5 is rotationally driven through, for example, a pulley 16, an electromagnetic clutch 17, and an armature 18 to which a driving force from an external driving source is input.

  The fixed scroll 2 and the housing 7 constitute a non-orbiting member, and at least one of the fixed scroll 2 and the housing 7 constituting the non-orbiting member (in the present embodiment, the stationary scroll 2 constitutes the housing 7 and the cylinder head 19). A rotation preventing member 21 extending between the fixed scroll member 20) and the movable scroll 3 and preventing the rotation of the movable scroll 3 is provided. In this embodiment, FIG. As shown, the rotation preventing member 21 is formed integrally with the movable scroll 3 and extends in a flat plate shape from the outer peripheral portion of the scroll wall of the movable scroll 3 toward the radially outer side.

  In addition, a rotation preventing member movable mechanism 22 that allows the rotation preventing member 21 itself to move, which is necessary for the rotation preventing member 21 to allow the orbiting movement of the movable scroll 3, is provided for the rotation preventing member 21. In this embodiment, the rotation preventing member movable mechanism 22 is provided on at least one of the fixed scroll 2 and the housing 7 (in this embodiment, provided on the fixed scroll member 20), and has an axis parallel to the crankshaft main shaft portion 5a. The rotating body space 23 includes a rotating body 24 that is rotatably fitted in the rotating body space 23 and holds the rotation preventing member 21 slidably. The rotating body 24 is configured to hold the rotation prevention member 21 slidably between the opposed flat bottom surfaces in a pair of two columnar shoes 24a and 24b each having an arc surface and a flat bottom surface. Formed from things.

As the shape of the shoe of the rotating body 24, for example, as shown in FIG. 4, in addition to the shape of a pair of semi-cylindrical bodies 24a and 24b, the rotating body 25 composed of hemispherical bodies 25a and 25b, and tapered semi-cylindrical bodies 26a and 26b. It is also possible to use a rotating body 26 made of As for the shape and installation position of the rotation preventing member 21, for example, as shown in FIG. 5, the rotation preventing member 32 can be formed integrally with the movable scroll 31 on the back side shoulder of the movable scroll 31. In FIG. 5, 33 indicates the center of the scroll wall of the movable scroll 31.

  Referring again to FIG. 1, in this embodiment, the back surface of the movable scroll 3 slides with the housing 7, and the drive mechanism portion accommodation space 41 of the crankshaft 5 partitioned from the suction chamber 11 is formed. The oil reservoir 15 below the discharge chamber 13 is provided with a lubricating oil path 42 through which lubricating oil can be supplied to the drive mechanism housing space 41, and a throttle 43 is provided in the middle. The lubricating oil path 42 is formed so as to pass through the rotating body space 23 described above.

  The lubricating oil passage 42 is particularly easy to form when it is made of a horizontal scroll type fluid machine in which the crankshaft main shaft portion 5a is disposed in the horizontal direction in the operating posture. Further, when the rotation preventing member 21 and the rotating body space 23 are arranged above or below the fixed scroll 2, it is easy to design the turning posture of the movable scroll, and the lubricating oil path is also designed. It is easy and is arrange | positioned above the fixed scroll 2 in this embodiment.

  The embodiment shown in FIGS. 1 and 2 will be described with reference to FIG. 6 for the turning operation and rotation prevention operation of the movable scroll 3. 6A, when the phase (turning position) of the center of the movable scroll 3 with respect to the center of the fixed scroll 2 is 0 °, (B) is 60 °, (C) is 120 °, and (D) is 180. °, (E) shows the case of 240 °, and (F) shows the case of 300 °, respectively. As the phase changes with the turning operation, the movable scroll 3 swings to the left and right in the drawing together with the rotation prevention member 21, and accordingly, the rotation prevention member 21 is connected to the pair of columnar shoes 24 a of the rotating body 24. , 24b slide in the vertical direction in the figure. At this time, the rotating body 24 is rotated while being held in the rotating body space 23. By these operations, the rotation preventing member 21 can tolerate the orbiting motion of the movable scroll 3 with almost no resistance. Further, since the position of the rotation prevention member 21 is always restricted above the movable scroll 3 (above the fixed scroll 2), the rotation of the movable scroll 3 formed integrally with the rotation prevention member 21 is reliable. Will be blocked.

  As described above, the rotation prevention mechanism does not have its own natural turning radius, and the assembly accuracy between other members and other mechanisms is not substantially required. Can be assembled with high accuracy. In addition, since a large amount of rotation or sliding is not required, high silence and durability can be expected. Therefore, high productivity, quietness, and performance can be stably obtained as a whole fluid machine including the rotation blocking mechanism of the movable scroll 3.

  In addition, since it is a rotation prevention mechanism in which no member or mechanism is interposed between the movable scroll 3 and the housing 7 in the axial direction, it can be easily reduced in size especially in the axial direction, thereby achieving weight reduction.

  Further, since the swinging motion angle of the movable scroll 3 (swinging motion angle of the rotation preventing member 21) can be suppressed to an extremely small value, a suitable profile of the wall on the fixed scroll 2 side, that is, an appropriate tip seal or the like can be used. It is possible to easily obtain a desired fixed scroll wall profile that can be performed.

  Further, since the lubricating oil path 42 is formed so as to pass through the rotating body space 23, the lubricating oil returned from the oil reservoir 15 below the discharge chamber 13 to the drive mechanism housing space 41 is also effective in the rotating body space 23 portion. Therefore, smoother operation (rotation and sliding operation) of the rotation prevention mechanism is ensured. At the same time, the lubricating oil path 42 can circulate the lubricating oil in a desired form to the drive mechanism portion side of the crankshaft 5, so that the performance of the scroll type fluid machine 1 as a whole is improved and the system incorporating the scroll type fluid machine 1 is incorporated. It can contribute to overall performance improvement (improvement of system side heat exchange efficiency due to reduction of oil circulation rate in system and reduction of power consumption due to reduction of pressure loss in piping).

  In the present invention, as described above, as shown in FIG. 7, for example, as shown in FIG. 7, the rotation prevention member 51 is rotatably engaged with the outer peripheral portion of the movable scroll 52 and the outer peripheral portion of the movable scroll 52. The rotation preventing member movable mechanism according to the present invention is provided on at least one of the fixed scroll and the housing (that is, provided on the fixed member 53 side), and includes a crankshaft main shaft portion 5a. It can also be set as the structure comprised from the reciprocating sliding hole 54 extended in the orthogonal direction and hold | maintaining the rotation prevention member 51 so that sliding is possible. Even with such a structure, the movable scroll 52 is prevented from rotating while the predetermined turning motion of the movable scroll 52 is ensured.

  The scroll type fluid machine according to the present invention can be applied to a scroll type compressor and an expander that require a reduction in size and weight and smooth operation, and is particularly suitable for a scroll type fluid machine for a vehicle that also requires quietness and durability. It is a thing.

It is a longitudinal section of a scroll type fluid machine concerning one embodiment of the present invention. It is a cross-sectional view of the scroll mechanism part of the fluid machine of FIG. It is the front view (A) and longitudinal cross-sectional view (B) of the movable scroll of the fluid machine of FIG. It is a perspective view which shows the various forms employable as a rotary body in the fluid machine of FIG. It is the front view (A) and longitudinal cross-sectional view (B) of the movable scroll which concern on another embodiment different from FIG. FIG. 2 is a cross-sectional view of a scroll mechanism section sequentially illustrating a turning operation and a rotation prevention operation of a movable scroll in the fluid machine of FIG. 1. It is a schematic block diagram of the scroll type fluid machine which concerns on another embodiment different from FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scroll type fluid machine 2 Fixed scroll 3 Moveable scroll 4 Fluid pocket 5 Crankshaft 5a Crankshaft main shaft part 6 Bearing 7 Housing 8 Crankpin 9 Eccentric bush 10 Bearing 11 Suction chamber 12 Discharge hole 13 Discharge chamber 14 Discharge port 15 Oil sump 16 Pulley 17 Electromagnetic clutch 18 Armature 19 Cylinder head 20 Fixed scroll member 21 Rotation prevention member 22 Rotation prevention member movable mechanism 23 Rotating body space 24 Rotating body 24a, 24b Columnar shoe 25 Rotating body 25a, 25b Shoe 26 Rotating body 26a, 26b Shoe 31 Movable scroll 32 Rotation prevention member 33 Center of scroll wall 41 of movable scroll Drive mechanism housing space 42 Lubricating oil path 43 Aperture 51 Rotation prevention member 52 Movable scroll 53 Fixed member 54 Reciprocating sliding hole

Claims (13)

  A fixed scroll; a movable scroll that meshes with the fixed scroll to form a fluid pocket that moves in a radial direction of the scroll; a crankshaft that engages the movable scroll to drive the movable scroll; and a bearing that supports the crankshaft In a scroll type fluid machine in which the movable scroll is swung with respect to the fixed scroll by a driving torque transmitted through the crankshaft, the fixed scroll and the housing constitute a non-turning member. A rotation preventing member that extends over at least one of the fixed scroll and the housing constituting the non-orbiting member and the movable scroll and prevents rotation of the movable scroll, and the rotation preventing member is movable with respect to the rotation preventing member. Scroll swirl A rotation preventing member movable mechanism for allowing the movement of the rotation preventing member itself necessary to allow the rotation is provided, and the rotation preventing member is fixed to the outer peripheral portion of the movable scroll and radially outward from the outer peripheral portion of the movable scroll. The rotation preventing member movable mechanism is provided on at least one of the fixed scroll and the housing, and has a rotating body space having an axis parallel to the crankshaft main shaft portion, and rotates in the rotating body space. The crankshaft drive mechanism portion which is configured to be slidably fitted and is configured to slidably hold the rotation prevention member, the back surface of the movable scroll sliding with the housing and partitioned from the suction chamber A housing space is formed, and a lubricating oil passage is provided through which oil can be supplied from the oil reservoir below the discharge chamber to the driving mechanism housing space. Ri, scroll fluid machine, characterized in that said lubricating oil passage is formed through the rotating body space.   The scroll type fluid machine according to claim 1, wherein the rotation prevention member is configured integrally with a scroll wall of the movable scroll.   The said rotary body is comprised so that the said rotation prevention member may be slidably hold | maintained between the flat bottom faces which oppose in the form of a pair of two columnar shoes which have a circular arc surface and a flat bottom face. Or the scroll type fluid machine of 2.   The distance from the axial center of the said rotary body space to the main-shaft part axial center of the said crankshaft is set to 1.5 times or more and 15 times or less of the turning radius of the said movable scroll. The scroll type fluid machine as described.   The rotating body space is a cylindrical space having a diameter D1, and the thickness of the maximum thickness portion with respect to the flat bottom surface for one of the columnar shoes is T1, and the thickness of the maximum thickness portion with respect to the flat bottom surface for the other columnar shoe. 5. The scroll type fluid machine according to claim 1, wherein the scroll type fluid machine is set to satisfy a relationship of D <b> 1> T <b> 1 + T <b> 2 + Ts when T <b> 2 is T <b> 2.   The scroll type fluid machine according to any one of claims 1 to 5, comprising a horizontal scroll type fluid machine in which a crankshaft main shaft portion is disposed in a horizontal direction in an operating posture. The scroll type fluid machine according to claim 6 , wherein the rotating body space is disposed above or below the fixed scroll.   A fixed scroll; a movable scroll that meshes with the fixed scroll to form a fluid pocket that moves in a radial direction of the scroll; a crankshaft that engages the movable scroll to drive the movable scroll; and a bearing that supports the crankshaft In a scroll type fluid machine in which the movable scroll is swung with respect to the fixed scroll by a driving torque transmitted through the crankshaft, the fixed scroll and the housing constitute a non-turning member. A rotation preventing member that extends over at least one of the fixed scroll and the housing constituting the non-orbiting member and the movable scroll and prevents rotation of the movable scroll, and the rotation preventing member is movable with respect to the rotation preventing member. Scroll swirl A rotation preventing member movable mechanism for allowing the movement of the rotation preventing member itself necessary to allow the rotation is provided, and the rotation preventing member is rotatably engaged with the outer peripheral portion of the movable scroll and from the outer peripheral portion of the movable scroll. The rotation preventing member movable mechanism is provided on at least one of the fixed scroll and the housing and extends in a direction orthogonal to the crankshaft main shaft portion and slides on the rotation preventing member. The reciprocating sliding hole is held so that the back surface of the movable scroll slides with the housing to form a drive mechanism housing space for the crankshaft that is partitioned from the suction chamber. A lubricating oil path is provided through which oil can be supplied from the oil reservoir to the drive mechanism housing space, and the lubricating oil path passes through the reciprocating sliding hole. Scroll fluid machine characterized in that it is formed by reason.   The rotationally engaging portion of the rotation preventing member to the outer peripheral portion of the movable scroll has a distance from the center axis of the crankshaft of the movable scroll to 1.5 times or more the turning radius of the movable scroll. The scroll type fluid machine according to claim 8, wherein the scroll type fluid machine is set at a place.   The scroll type fluid machine according to claim 8 or 9, comprising a horizontal scroll type fluid machine in which a crankshaft main shaft portion is disposed in a horizontal direction in an operating posture.   A spiral curve that forms the scroll wall of the fixed scroll and the center of the main shaft portion of the crankshaft that is rotationally supported by the bearing of the housing, and the origin of the spiral curve that forms the scroll wall coincides with the bearing center of the back surface of the movable scroll The scroll type fluid machine according to any one of claims 1 to 10, wherein the origins of the two are the same.   A bush integrated with the counterweight is interposed between the crankpin of the crankshaft and the bearing on the back of the movable scroll, whereby torque from the crankpin is transmitted to the movable scroll and at the same time the centrifugal force of the movable scroll cancels out. The scroll type fluid machine according to claim 1, wherein the scroll type fluid machine is configured to be reduced.   The scroll type fluid machine according to any one of claims 1 to 12, wherein a wall thickness of one or both of the movable scroll and the fixed scroll is reduced outward.

Images