JP2007100599A - Scroll fluid machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a self-rotation preventive device from being damaged by enhancing accuracy of eccentric turning of a turning scroll. <P>SOLUTION: A turning shaft 10 is eccentrically rotatably supported by a rotary shaft 7, and a support plate 17 is installed in a casing 1. A rotary plate 20 is rotatably supported by the support plate 17 via a bearing 19 for receiving force in the thrust direction, and a turning plate 22 is installed on a turning shaft 10. A connecting shaft 23 is fixed to the turning plate 22, and the connecting shaft 23 is rotatably supported by the rotary plate 20 to the rotary plate 20 via a bearing 21 for receiving the force in the thrust direction. A fixed scroll 26 is installed in the casing 1, and a turning scroll 27 is installed on the turning shaft 10. A distance between the center of the rotary plate 20 and the center of the connecting shaft 23 is set equal to a distance between the center of the rotary shaft 7 and the center of the turning shaft 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a scroll fluid machine used as an air compressor, a vacuum pump, a refrigerant gas compressor, a compressor for an oxygen suction machine, or the like.

  Patent Document 1 discloses a scroll fluid in which a rotating shaft is eccentrically supported on a rotating shaft of a motor and rotatably supported, a rotating scroll is attached to the rotating shaft, and an anti-rotation device having an Oldham coupling between the rotating shaft and a casing is provided. The machine is described.

JP-A-63-138180

  However, in such a scroll fluid machine, since the rotation prevention device has low rigidity, the eccentric turning accuracy of the orbiting scroll is low, and excessive force acts on the rotation prevention device, which may damage the rotation prevention device. is there.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a scroll fluid machine having high accuracy of eccentric turning of the orbiting scroll and less likely to damage the rotation prevention device.

  In order to achieve this object, in the present invention, a stator fixed to a casing, a rotating shaft rotatably supported by the casing, a rotor fixed to the rotating shaft, and a rotation eccentric to the rotating shaft. A pivot shaft supported by the casing, a support plate attached to the casing, a rotary plate rotatably supported by the support plate, a pivot plate attached to the pivot shaft, and fixed to the pivot plate. And a connecting shaft supported by the rotating plate so as to be rotatable with respect to the rotating plate, a fixed scroll attached to the casing, and a turning scroll attached to the orbiting shaft, and a center of the rotating plate. The distance from the center of the connecting shaft is made equal to the distance between the center of the rotating shaft and the center of the pivot shaft.

  In this case, the rotating plate is rotatably supported by the support plate via a first bearing that receives a thrust force, and the connecting shaft is rotatable via a second bearing that receives a thrust force. You may support to the said rotating plate.

  A stator fixed to the casing; a rotation shaft rotatably supported by the casing; a rotor fixed to the rotation shaft; a pivot shaft eccentrically supported by the rotation shaft; A support plate attached to the casing; a revolving plate attached to the revolving shaft; a rotating plate rotatably supported on the revolving plate; and fixed to the revolving plate and rotatable relative to the supporting plate A connecting shaft supported by the support plate, a fixed scroll attached to the casing, and a turning scroll attached to the orbiting shaft are provided, and the distance between the center of the rotating plate and the center of the connecting shaft is The distance between the center of the rotating shaft and the center of the turning shaft is made equal.

  In this case, the rotating plate is rotatably supported by the swivel plate via a third bearing that receives a thrust force, and the connecting shaft is rotatable via a fourth bearing that receives a thrust force. You may support to the said support plate.

  In these cases, the swivel plate may be positioned between the two support plates.

  Further, in the scroll fluid machine having a rotating plate rotatably supported by the revolving plate, an LM guide type anti-rotation device may be provided.

  In these cases, a weight plate may be attached to the pivot shaft, and the center line of the pivot shaft and the center of gravity of the weight plate may be positioned on both sides of the center line of the rotation shaft.

  In this case, a sum of a moment vector perpendicular to the rotation axis of the weight plate, a moment vector perpendicular to the rotation axis of the orbiting scroll, and a moment vector perpendicular to the rotation axis of the orbiting plate may be set as a zero vector.

  In these cases, the pivot shaft may be supported on the rotary shaft so as to be rotatable by a bearing that does not receive a thrust force.

  In these cases, the pressing member made of an elastic body may prevent the pivot plate from moving in the axial direction of the pivot shaft.

  In these cases, the turning shaft is separated into a first separation turning shaft and a second separation turning shaft, a recess is provided in the first separation turning shaft, and a second separation turning shaft is provided with a projection, Engaging the concave portion and the convex portion to connect the first separated pivot shaft and the second separated pivot shaft so as to be movable only in the axial direction, the first and second separated pivot shafts, respectively. The orbiting scroll may be attached to the first and second separated orbiting shafts.

  In the scroll fluid machine according to the present invention, the anti-rotation device has high rigidity, so that the accuracy of eccentric turning of the orbiting scroll is high, and an excessive force does not act on the anti-rotation device. Hard to do.

  Further, the rotating plate is rotatably supported by a support plate via a first bearing that receives thrust force, and the connecting shaft is rotatably supported by the rotating plate via a second bearing that receives thrust force. When this is done, it is possible to prevent the orbiting scroll from moving in the direction of the center line of the rotating shaft.

  Further, the rotating plate is rotatably supported on the swivel plate via a third bearing that receives thrust force, and the connecting shaft is rotatably supported on the support plate via a fourth bearing that receives thrust force. When this is done, it is possible to prevent the orbiting scroll from moving in the direction of the center line of the rotating shaft.

  Further, when the swivel plate is positioned between the two support plates, the rigidity of the rotation prevention device can be further increased, so that the accuracy of the eccentric swivel can be further increased.

  Further, when the LM guide type rotation prevention device is provided, the rotation of the turning shaft can be surely prevented.

  In addition, when the weight plate is attached to the orbiting shaft and the center line of the orbiting shaft and the center of gravity of the weight plate are positioned on both sides of the center line of the rotating shaft, vibration of the orbiting plate can be suppressed. Vibration can be suppressed.

  In addition, when the sum of the moment vector perpendicular to the spindle axis, the moment vector perpendicular to the orbiting scroll axis, and the moment vector perpendicular to the orbiting axis is zero vector, the oscillation of the orbiting plate Since it can suppress, the vibration of a turning scroll can be suppressed reliably.

  Further, when the turning shaft is rotatably supported by the bearing that does not receive the thrust force, it is possible to prevent an excessive force from acting on the turning shaft.

  Further, when the movement of the swivel plate in the axial direction is prevented by the pressing member made of an elastic body, the swivel plate can be inclined with respect to the axial direction of the swivel shaft, so that excessive force is applied to the swivel shaft and the swivel plate. It can be prevented from acting.

  Further, the turning shaft is separated into a first separation turning shaft and a second separation turning shaft, a recess is provided in the first separation turning shaft, a projection is provided on the second separation turning shaft, and a depression and a projection are provided. And the first separated swivel shaft and the second separated swivel shaft are connected so as to be movable only in the axial direction, and a swirl plate is attached to each of the first and second separated swivel shafts, When the orbiting scroll is attached to each of the second separated orbiting shafts, it is possible to prevent an excessive force in the central axis direction from acting on the orbiting shaft.

  1 is a schematic sectional view showing a scroll fluid machine according to the present invention, FIG. 2 is an enlarged sectional view showing a part of the scroll fluid machine shown in FIG. 1, FIG. 3 is a sectional view taken along line AA in FIG. FIG. 3 is a sectional view taken along line BB in FIG. As shown in the figure, a stator 2 is fixed to a casing 1, bearing supports 3 and 4 are fixed to the casing 1, and a rotating shaft 7 is rotatably supported by the bearing supports 3 and 4 via bearings 5 and 6. Yes. That is, the rotating shaft 7 is rotatably supported by the casing 1. A rotor 8 is fixed to the rotating shaft 7, and a motor 9 is configured by the stator 2, the rotor 8, and the like. In addition, the rotary shaft 10 is rotatably supported by the rotary shaft 7 via bearings 11 and 12 that do not receive a thrust force, and the center line of the rotary shaft 7 and the center line of the rotary shaft 10 are biased. That is, the swivel shaft 10 is eccentrically supported by the rotation shaft 7 and is rotatably supported. Further, a weight plate 13 is rotatably attached to the pivot shaft 10 via a bearing 14, an engagement hole 15 is provided in the weight plate 13, a pin 16 is attached to one end surface of the rotation shaft 7, and the pin 16 is engaged. A small gap is provided between the inner surface of the engagement hole 15 and the pin 16, and the weight plate 13 is connected to the center line of the rotation shaft 7 and the pivot shaft 10 with respect to the rotation shaft 7. The connecting means for connecting the rotary shaft 7 and the weight plate 13 by the pin 16 and the engagement hole 15 is configured. The center of gravity of the weight plate 13 is located on a line connecting the center line of the rotating shaft 7 and the center line of the turning shaft 10 in FIG. 4, and the center line of the turning shaft 10 and the center of gravity of the weight plate 13 are the rotation axes. 7 on both sides of the center line. A vector having the product of the distance from the center line of the rotating shaft 7 to the center of gravity of the weight plate 13 and the weight of the weight plate 13 and the direction from the center line of the rotating shaft 7 to the center of gravity of the weight plate 13 as a direction. Is a moment vector perpendicular to the rotating shaft 7 of the weight plate 13, the product of the distance from the center line of the rotating shaft 7 to the center of gravity of the orbiting scroll 27 (described later) and the weight of the orbiting scroll 27, and the rotating shaft 7 A vector whose direction is from the center line to the center of gravity of the orbiting scroll 27 is a moment vector perpendicular to the rotating shaft 7 of the orbiting scroll 27, and the distance from the center line of the rotating shaft 7 to the center of gravity of the orbiting plate 22 (described later). A vector whose magnitude is the product of the weight of the swivel plate 22 and the direction from the center line of the rotating shaft 7 to the center of gravity of the swivel plate 22 is a moment vector perpendicular to the rotating shaft 7 of the swivel plate 22. , Perpendicular moment vector to the rotation shaft 7 of the weight plate 13, the sum of the perpendicular moment vector to the rotation shaft 7 of the perpendicular moment vector to the rotating shaft 7 and the turning plate 22 of the orbiting scroll 27 is zero vector. In addition, two support plates 17 are attached to the casing 1, holes 18 are provided in the support plate 17, and the pivot shaft 10 passes through the holes 18 of the support plate 17, so that a thrust force is applied to the support plate 17. Three rotating plates 20 are rotatably supported via the first bearing 19 that receives the bearings. A swivel plate 22 is attached to the swivel shaft 10, and the swivel plate 22 is positioned between the two support plates 17. A flat portion 24 is provided on the swivel plate 22 attachment portion of the swivel shaft 10 and is elastic. The female screw of the holding member 25 made of a body is screwed into the male screw portion provided on the turning shaft 10, and the holding member 25 prevents the turning plate 22 from moving downward in FIG. In addition, three connecting shafts 23 are fixed to both surfaces of the swivel plate 22, and the connecting shaft 23 is rotatable to the rotating plate 20 via the second bearing 21 that receives a thrust force. It is supported. The distance between the center of the rotating plate 20 and the center of the connecting shaft 23 is equal to the distance between the center of the rotating shaft 7 and the center of the turning shaft 10, and the support plate 17, the rotating plate 20, the turning plate 22, the connecting shaft 23, etc. Thus, an anti-rotation device that allows eccentric rotation of the turning shaft 10 and the turning plate 22 and prevents rotation of the turning shaft 10 and the turning plate 22 is configured. A fixed scroll 26 is fixed to the casing 1, and the fixed scroll 26 is provided with a spiral wrap. The orbiting scroll 27 is attached to the orbiting shaft 10, and the orbiting plate 22 is pressed against the lower part of the orbiting scroll 27 by the pressing member 25. In other words, the pressing member 25 made of an elastic body prevents the revolving plate 22 from moving in the axial direction of the revolving shaft 10. Further, the orbiting scroll 27 is provided with a wrap having the same shape as the wrap of the fixed scroll 26, and the wrap of the orbiting scroll 27 and the wrap of the fixed scroll 26 are overlapped to form a plurality of compression chambers 28. The suction pipe 29 is connected to the fixed scroll 26, the discharge pipe 30 is connected to the fixed scroll 26, and the suction pipe 29 and the discharge pipe 30 communicate with the compression chamber 28. Has been.

  In the scroll fluid machine shown in FIGS. 1 to 4, when the winding of the stator 2 of the motor 9 is energized, the rotor 8 and the rotating shaft 7 rotate, and the turning shaft 10 and the turning plate 22 are center lines of the rotating shaft 7. The rotation axis 10 and the rotation plate 22 do not rotate because the rotation prevention device is provided. For this reason, since the orbiting scroll 27 rotates eccentrically without rotating with respect to the casing 1 and the fixed scroll 26, the compression chamber 28 formed between the orbiting scroll 27 and the fixed scroll 26 is gradually reduced. Therefore, a compressed gas such as air is sucked from the suction pipe 29, compressed in the compression chamber 28, and discharged from the discharge pipe 30.

  In such a scroll fluid machine, since the rotation prevention device having the support plate 17, the rotation plate 20, the turning plate 22, and the connecting shaft 23 is used, the rotation prevention device has high rigidity. The accuracy of eccentric turning is high, and an excessive force is not applied to the rotation prevention device, so that the rotation prevention device is hardly damaged. Further, since the turning plate 22 is positioned between the two support plates 17, the rigidity of the rotation prevention device can be further increased, and therefore the accuracy of the eccentric turning can be further increased. Further, the rotating plate 20 is rotatably supported on the support plate 17 via a bearing 19 that receives thrust force, and the connecting shaft 23 is supported on the rotating plate 20 via a bearing 21 that receives thrust force. Therefore, it is possible to prevent the orbiting scroll 27 from moving in the direction of the center line of the rotary shaft 7. Further, since the turning shaft 10 is rotatably supported on the rotating shaft 7 via the bearings 11 and 12 that do not receive the thrust force, it is possible to prevent an excessive force from acting on the turning shaft 10. . Moreover, since the axial movement of the turning shaft 10 of the turning plate 22 is prevented by the pressing member 25 made of an elastic body, the turning plate 22 can be inclined with respect to the axial direction of the turning shaft 10. It is possible to prevent an excessive force from acting on the revolving plate 22. Further, since the center line of the turning shaft 10 and the center of gravity of the weight plate 13 are located on both sides of the center line of the rotating shaft 7, balance can be achieved, so that vibration of the turning shaft 10 and the turning scroll 27 is suppressed. can do. For this reason, since the rotation speed of the rotating shaft 7 can be increased, the orbiting scroll 27 can be driven at high speed. Further, the sum of the moment vector perpendicular to the rotating shaft 7 of the weight plate 13, the moment vector perpendicular to the rotating shaft 7 of the orbiting scroll 27, and the moment vector perpendicular to the rotating shaft 7 of the orbiting plate 22 is zero. When the sum of the moment vector perpendicular to the rotation axis 7 of the scroll 27 and the moment vector perpendicular to the rotation axis 7 of the swivel plate 22 is the sum vector, the magnitude of the moment vector perpendicular to the rotation axis 7 of the weight plate 13 is summed. Since the direction of the moment vector that is equal to the vector size and perpendicular to the rotation axis 7 of the weight plate 13 is the direction opposite to the direction of the sum vector, vibration of the orbiting plate 22 can be reliably suppressed. 27 can be reliably suppressed.

  FIG. 5 is a schematic sectional view showing another scroll fluid machine according to the present invention. As shown in the figure, the turning shaft 10 is separated into a first separation turning shaft 10a and a second separation turning shaft 10b, a recess 31 is provided in the separation turning shaft 10a, and a protrusion 32 is provided on the separation turning shaft 10b. Provided, the recess 31 and the protrusion 32 are engaged, and the separation turning shaft 10a and the separation turning shaft 10b cannot move relative to each other in the rotational direction, but can move relatively in the axial direction. is there. That is, the separation turning shaft 10a and the separation turning shaft 10b are connected so as to be movable only in the axial direction. Further, a weight plate 13a is attached to the separation turning shaft 10a, a weight plate 13b is attached to the separation turning shaft 10b, and the construction of the weight plates 13a and 13b is the same as that of the weight plate 13 portion of the scroll fluid machine shown in FIG. The configuration is the same. Further, a swivel plate 22 a is attached to the separation swivel shaft 10 a, and three connecting shafts 23 a are fixed to both surfaces of the swivel plate 22 a, and the connecting shaft 23 a rotates so as to be rotatable with respect to the rotating plate 20 via the bearing 21. It is supported by the plate 20. Then, the support plate 17, the rotation plate 20, the turning plate 22a, the connecting shaft 23a, etc. allow the eccentric turning of the separation turning shaft 10a and the turning plate 22a and prevent the rotation of the separation turning shaft 10a and the turning plate 22a. An anti-rotation device is configured. Further, a swivel plate 22b is attached to the separation swivel shaft 10b, and three connecting shafts 23b are fixed to both surfaces of the swivel plate 22b. The connecting shafts 23b rotate with respect to the rotating plate 20 via bearings 21. It is supported by the plate 20. Then, the support plate 17, the rotation plate 20, the turning plate 22b, the connecting shaft 23b, etc. allow the eccentric turning of the separation turning shaft 10b and the turning plate 22b and prevent the rotation of the separation turning shaft 10b and the turning plate 22b. An anti-rotation device is configured. Further, the fixed scroll 26a is fixed to the casing 1, the turning scroll 27a is attached to the separation turning shaft 10a, the wrap of the turning scroll 27a and the wrap of the fixed scroll 26a are overlapped, and a plurality of compression chambers 28a are formed, A suction pipe 29a is connected to the fixed scroll 26a, a discharge pipe 30a is connected to the fixed scroll 26a, and the suction pipe 29a and the discharge pipe 30a communicate with the compression chamber 28a. The fluid machine main body is configured. The fixed scroll 26b is fixed to the casing 1, the orbiting scroll 27b is attached to the separation orbiting shaft 10b, the wrap of the orbiting scroll 27b and the wrap of the fixed scroll 26b are overlapped, and a plurality of compression chambers 28b are formed. A suction pipe 29b is connected to the fixed scroll 26b, a discharge pipe 30b is connected to the fixed scroll 26b, and the suction pipe 29b and the discharge pipe 30b communicate with the compression chamber 28b. The fluid machine main body is configured.

  In the scroll fluid machine shown in FIG. 5, when the winding of the stator 2 of the motor 9 is energized, the rotor 8 and the rotating shaft 7 rotate, and the turning shaft 10 and the turning plates 22 a and 22 b follow the center line of the rotating shaft 7. Although it turns eccentrically as the center, since the first and second rotation prevention devices are provided, the turning shaft 10 and the turning plates 22a and 22b do not rotate. For this reason, since the orbiting scrolls 27a and 27b do not rotate with respect to the casing 1 and the fixed scrolls 26a and 26b, the orbiting scrolls 27a and 27b rotate eccentrically. 28b are gradually reduced. Therefore, the compressed gas such as air is sucked from the suction pipes 29a and 29b, compressed in the compression chambers 28a and 28b, and discharged from the discharge pipes 30a and 30b.

  In such a scroll fluid machine, the separated turning shaft 10a and the separated turning shaft 10b are connected so as to be movable only in the axial direction, so that an excessive force in the central axis direction is prevented from acting on the turning shaft 10. can do. Further, if the first rotation prevention device and the first fluid machine main body are set as a set, and the second rotation prevention device and the second fluid machine main body are set as a set and attached to the turning shaft 10, the scroll fluid machine can be easily obtained. Can be manufactured.

  6 is a sectional view showing a part of another scroll fluid machine according to the present invention, FIG. 7 is a sectional view taken along the line CC in FIG. 6, and FIG. 8 is a sectional view taken along the line DD in FIG. As shown in the figure, two support plates 41 are attached to the casing 1, a hole 42 is provided in the support plate 41, and the pivot 10 passes through the hole 42. A swivel plate 44 is attached to the swivel shaft 10, and the swivel plate 44 is positioned between the two support plates 41. The swivel plate 44 is connected to the swivel plate 44 via a third bearing 45 that receives a thrust force in the thrust direction. A rotating plate 46 is rotatably supported, and connecting shafts 47 are fixed to both surfaces of the rotating plate 46. The connecting shaft 47 rotates relative to the supporting plate 41 via a fourth bearing 43 that receives a thrust force. It is supported by the support plate 41 as possible. The distance between the center of the rotating plate 46 and the center of the connecting shaft 47 is equal to the distance between the center of the rotating shaft 7 and the center of the turning shaft 10, and the support plate 41, the turning plate 44, the rotating plate 46, the connecting shaft 47, etc. Thus, an anti-rotation device that allows eccentric rotation of the turning shaft 10 and the turning plate 44 and prevents rotation of the turning shaft 10 and the turning plate 44 is configured.

  In the scroll fluid machine shown in FIGS. 6 to 8, when the winding of the stator 2 of the motor 9 is energized, the rotor 8 and the rotary shaft 7 rotate, and the rotary shaft 10 and the rotary plate 44 are center lines of the rotary shaft 7. The rotation axis 10 and the rotation plate 44 do not rotate because the rotation prevention device is provided. For this reason, since the orbiting scroll 27 rotates eccentrically without rotating with respect to the casing 1 and the fixed scroll 26, the compression chamber 28 formed between the orbiting scroll 27 and the fixed scroll 26 is gradually reduced. Therefore, a compressed gas such as air is sucked from the suction pipe 29, compressed in the compression chamber 28, and discharged from the discharge pipe 30.

  In such a scroll fluid machine, since the rotation prevention device having the support plate 41, the turning plate 44, the rotating plate 46, and the connecting shaft 47 is used, the rotation prevention device has high rigidity. The accuracy of eccentric turning is high, and an excessive force is not applied to the rotation prevention device, so that the rotation prevention device is hardly damaged. Further, since the turning plate 44 is positioned between the two support plates 41, the rigidity of the rotation prevention device can be further increased, and therefore the accuracy of the eccentric turning can be further increased. The rotating plate 46 is rotatably supported by the swivel plate 44 via a bearing 45 that receives thrust force, and the connecting shaft 47 is supported by the support plate 41 via a bearing 43 that receives thrust force. Therefore, it is possible to prevent the orbiting scroll 27 from moving in the direction of the center line of the rotary shaft 7.

  9 is a cross-sectional view showing a part of another scroll fluid machine according to the present invention, FIG. 10 is a cross-sectional view taken along line EE in FIG. 9, and FIG. 11 is a cross-sectional view taken along line FF in FIG. As shown in the figure, an attachment plate 61 is attached to the casing 1, a hole 62 is provided in the attachment plate 61, and the lower portion of the orbiting scroll 27 passes through the hole 62. A first LM block 63 is attached to the attachment plate 61. A swivel plate 64 is attached to the swivel shaft 10, and the swivel plate 64 is positioned below the attachment plate 61 in FIG. 9 and is held in the axial direction of the swivel shaft 10 of the swivel plate 64 by a pressing member 25 made of an elastic body. Movement is prevented. A second LM block 67 is attached to the turning plate 64, and the center line of the first LM block 63 and the center line of the second LM block 67 are perpendicular to each other. A moving ring 68 is provided between the mounting plate 61 and the swivel plate 64, and the first and second LM rails 69, 70 are fixed to the moving ring 68, and the center line of the LM rail 69 and the LM rail 70 are connected to each other. It is perpendicular to the center line. Further, the LM rail 69 is supported by the LM block 63 so as to be relatively slidable through the balls, and the LM rail 70 is supported by the LM block 67 so as to be relatively slidable through the balls. The mounting plate 61, the swivel plate 64, the LM blocks 63 and 67, the moving ring 68, and the LM rails 69 and 70 allow the swivel shaft 10 and the swivel plate 64 to rotate eccentrically, and the swivel shaft 10 and the swivel plate 64 rotate. The LM guide type | mold rotation prevention apparatus which prevents is comprised. A support plate 73 is attached to the casing 1, a hole 74 is provided in the support plate 73, and the turning shaft 10 passes through the hole 74. Further, the three rotating plates 71 are rotatably supported by the swivel plate 64 via a third bearing 72 that receives a thrust force, and the connecting shaft 75 is fixed to one surface of the rotating plate 71. The support plate 73 is rotatably supported by the support plate 73 via a fourth bearing 76 that receives a thrust force. The distance between the center of the rotating plate 71 and the center of the connecting shaft 75 is equal to the distance between the center of the rotating shaft 7 and the center of the turning shaft 10, and the support plate 73, the turning plate 64, the rotating plate 71, the connecting shaft 75, etc. Thus, an anti-rotation device that allows eccentric rotation of the turning shaft 10 and the turning plate 64 and prevents rotation of the turning shaft 10 and the turning plate 64 is configured.

  In the scroll fluid machine shown in FIGS. 9 to 11, when the winding of the stator 2 of the motor 9 is energized, the rotor 8 and the rotating shaft 7 rotate, and the turning shaft 10 and the turning plate 64 are center lines of the rotating shaft 7. The LM guide type anti-rotation device and the anti-rotation device having the rotating plate 71 are provided, so that the revolving shaft 10 and the revolving plate 64 do not rotate. For this reason, since the orbiting scroll 27 rotates eccentrically without rotating with respect to the casing 1 and the fixed scroll 26, the compression chamber 28 formed between the orbiting scroll 27 and the fixed scroll 26 is gradually reduced. Therefore, a compressed gas such as air is sucked from the suction pipe 29, compressed in the compression chamber 28, and discharged from the discharge pipe 30.

  Since such a scroll fluid machine has the LM guide type rotation prevention device, the rotation of the orbiting shaft 10 can be surely prevented, so that the rotation of the orbiting scroll 27 can be surely prevented.

  In the above-described embodiment, the two support plates 17 and 41 are provided. However, a single support plate may be provided. Further, in the scroll fluid machine shown in FIG. 5, as the first and second rotation preventing devices, the rotation preventing device for the scroll fluid machine shown in FIGS. 6 to 8, and the scroll fluid machine shown in FIGS. An anti-rotation device may be used.

It is a schematic sectional drawing which shows the scroll fluid machine which concerns on this invention. It is an expanded sectional view which shows a part of scroll fluid machine shown by FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing which shows the other scroll fluid machine which concerns on this invention. It is sectional drawing which shows a part of other scroll fluid machine which concerns on this invention. It is CC sectional drawing of FIG. It is DD sectional drawing of FIG. It is sectional drawing which shows a part of other scroll fluid machine which concerns on this invention. It is EE sectional drawing of FIG. It is FF sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Casing 2 ... Stator 7 ... Rotating shaft 8 ... Rotor 10 ... Turning shaft 10a ... Separate turning shaft 10b ... Separate turning shaft 11, 12 ... Bearing 13 ... Weight plate 17 ... Support plate 19 ... 1st bearing 20 ... Rotating plate DESCRIPTION OF SYMBOLS 21 ... 2nd bearing 22 ... Revolving plate 22a ... Revolving plate 22b ... Revolving plate 23 ... Connection shaft 23a ... Connection shaft 23b ... Connection shaft 25 ... Holding member 26 ... Fixed scroll 26a ... Fixed scroll 26b ... Fixed scroll 27 ... Revolving scroll 27a ... Orbiting scroll 27b ... Orbiting scroll 31 ... Concave portion 32 ... Convex portion 41 ... Support plate 43 ... Fourth bearing 44 ... Orbiting plate 45 ... Third bearing 46 ... Rotating plate 47 ... Connecting shaft 61 ... Mounting plate 63 ... No. 1 LM block 64 ... swivel plate 67 ... second LM block 68 ... moving ring 69 ... first LM rail 70 ... second LM rail 71 ... rotation Plate 72 ... Third bearing 73 ... Support plate 75 ... Connecting shaft 76 ... Fourth bearing

Claims (11)

  A stator fixed to the casing, a rotating shaft rotatably supported by the casing, a rotor fixed to the rotating shaft, a turning shaft eccentrically supported by the rotating shaft, and a rotating shaft; An attached support plate, a rotating plate rotatably supported by the support plate, a turning plate attached to the turning shaft, and the rotation fixed to the turning plate and rotatable relative to the turning plate A connecting shaft supported by a plate, a fixed scroll attached to the casing, and a orbiting scroll attached to the orbiting shaft, the distance between the center of the rotating plate and the center of the connecting shaft being rotated A scroll fluid machine characterized in that the distance between the center of the shaft and the center of the pivot shaft is equal.   The rotating plate is rotatably supported by the support plate via a first bearing that receives a thrust force, and the connecting shaft is rotatable via a second bearing that receives a thrust force. The scroll fluid machine according to claim 1, wherein the scroll fluid machine is supported on the scroll fluid machine.   A stator fixed to the casing, a rotating shaft rotatably supported by the casing, a rotor fixed to the rotating shaft, a turning shaft eccentrically supported by the rotating shaft, and a rotating shaft; An attached support plate, a turning plate attached to the turning shaft, a rotating plate rotatably supported by the turning plate, and the support fixed to the rotating plate and rotatable relative to the supporting plate A connecting shaft supported by a plate, a fixed scroll attached to the casing, and a orbiting scroll attached to the orbiting shaft, the distance between the center of the rotating plate and the center of the connecting shaft being rotated A scroll fluid machine characterized in that the distance between the center of the shaft and the center of the pivot shaft is equal.   The rotating plate is rotatably supported by the swivel plate via a third bearing that receives a thrust force, and the connecting shaft is rotatable by a fourth bearing that receives a thrust force. The scroll fluid machine according to claim 3, wherein the scroll fluid machine is supported by the scroll fluid machine.   The scroll fluid machine according to any one of claims 1 to 4, wherein the swivel plate is positioned between the two support plates.   The scroll fluid machine according to claim 3, further comprising an LM guide type anti-rotation device.   7. A weight plate is attached to the pivot shaft, and the center line of the pivot shaft and the center of gravity of the weight plate are positioned on both sides of the center line of the rotation shaft. Scroll fluid machine.   The sum of a moment vector perpendicular to the rotational axis of the weight plate, a moment vector perpendicular to the rotational axis of the orbiting scroll, and a moment vector perpendicular to the rotational axis of the orbiting plate is a zero vector. The scroll fluid machine according to claim 7.   9. The scroll fluid machine according to claim 1, wherein the rotary shaft is supported by the rotary shaft so as to be rotatable by a bearing which does not receive a thrust force.   The scroll fluid machine according to any one of claims 1 to 9, wherein movement of the swivel plate in the axial direction of the swivel shaft is prevented by a pressing member made of an elastic body.   The swivel shaft is separated into a first separate swivel shaft and a second separate swivel shaft, a recess is provided in the first separate swivel shaft, a second separate swivel shaft is provided with a convex portion, and the recess and the above Engaging with the convex portion, the first separated swivel shaft and the second separated swivel shaft are connected so as to be movable only in the axial direction, and the swivel plate is connected to each of the first and second separated swivel shafts. The scroll fluid machine according to claim 1, wherein the orbiting scroll is attached to each of the first and second separated orbiting shafts.

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