CN112524030A

CN112524030A - Anti-rotation structure, pump body assembly and compressor

Info

Publication number: CN112524030A
Application number: CN202011395463.4A
Authority: CN
Inventors: 马英超; 魏会军; 刘雷; 陈江嘉; 顾晋僚
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai; Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-03-19

Abstract

The invention provides an anti-rotation structure, a pump body assembly and a compressor, relates to the field of compressors, and solves the technical problems that a cross slip ring is used as the anti-rotation structure, so that an orbiting scroll is not stable in operation and poor in stability. The anti-rotation structure comprises an installation part and an assembly part, wherein the installation part is positioned on the movable scroll, the assembly part is positioned on the support, the assembly part extends into the installation part and allows the installation part to rotate around the periphery of the assembly part, and the assembly part can be always abutted against different positions of the inner wall of the installation part when the movable scroll is positioned at the upper end of the support and revolves around the fixed scroll so as to limit the rotation of the movable scroll. The invention prevents the movable scroll from rotating by limiting the rotation of the mounting part through the assembling part; a cross slip ring structure is omitted, and eccentric wear caused by shearing force of the cross slip ring is prevented; move the vortex dish and can directly laminate in the support setting, increased the area of contact who moves vortex dish and support, prevent to move the vortex dish and topple, move the vortex dish operation comparatively steady, the structure is more stable.

Description

Anti-rotation structure, pump body assembly and compressor

Technical Field

The invention relates to the technical field of compressors, in particular to an anti-rotation structure, a pump body assembly and a compressor.

Background

The pump body of the traditional scroll compressor mainly comprises a movable scroll plate, a fixed scroll plate, a crankshaft, a bracket and a cross slip ring, wherein the movable scroll plate and the fixed scroll plate are matched to form a compression cavity, and the relative motion between the movable scroll plate and the fixed scroll plate realizes the compression of working media in the compression cavity. When the movable vortex disc moves, the motor drives the crankshaft to rotate, the crankshaft drives the central shaft of the movable vortex disc to rotate around the central axis of the fixed vortex disc (rotate by an eccentric amount R), but the movable vortex disc does not rotate around the central axis of the movable vortex disc, so that the fluid is compressed.

In the prior art, in order to prevent the movable scroll from rotating, a structure of a cross slip ring is generally adopted, the cross slip ring is located on the upper end face of a support, one group of keys are in fit contact with key grooves on the movable scroll, the other group of keys are in fit contact with key grooves on the fixed scroll, when the movable scroll is in translation motion around the fixed scroll, the keys on the cross slip ring can do reciprocating linear motion along the corresponding matched key grooves, namely, the movable scroll is matched with the cross slip ring to move, and the translation motion that the movable scroll revolves relative to the fixed scroll and cannot rotate is synthesized.

The applicant has found that the prior art has at least the following technical problems:

1. the cross slip ring is positioned between the bracket and the movable scroll plate, so that the movable scroll plate is not contacted with the bracket, the movable scroll plate is easy to overturn during operation, and the stability is poor; the compressor has poor operation stability.

2. The cross slip ring structure in the prior art is easily influenced by shearing force, so that the movable vortex plate and the fixed vortex plate do not stably run, and eccentric wear is caused;

3. the matching structure of the key in the cross-shaped sliding ring and the key groove on the movable vortex disc or the fixed vortex disc is relatively closed, so that less local oil supply is easily caused, and the movable vortex disc, the fixed vortex disc and the bracket part are abraded.

Disclosure of Invention

The invention aims to provide an anti-rotation structure, a pump body assembly and a compressor, and aims to solve the technical problems that a cross slip ring serving as the anti-rotation structure in the prior art makes an orbiting scroll operate unstably and have poor stability; the technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme:

the invention provides an anti-rotation structure, which comprises an installation part positioned on a movable scroll and an assembly part positioned on a bracket, wherein:

the assembly part extends into the installation part and allows the installation part to rotate on the periphery of the installation part, and the assembly part can always abut against different positions of the inner wall of the installation part when the movable scroll revolves around the fixed scroll and is used for limiting the rotation of the movable scroll.

Preferably, the mounting portion is a hole, and an inner wall of the hole is always abutted to an outer wall of the mounting portion.

Preferably, the mounting location is a pin extending into the aperture.

Preferably, all the assembling positions are arranged on the periphery of the upper end face of the bracket.

Preferably, the mounting portion is a through hole provided in an outer periphery of the orbiting scroll.

Preferably, the central lines of all the installation positions are collinear with the central axis of the movable scroll.

Preferably, the center lines of all the assembling portions are arranged in a line with the central axis of the fixed scroll.

Preferably, there is a hole in the assembly portion, and a fastener extends through the fixed scroll plate into the hole and locks the fixed scroll plate and the bracket.

Preferably, the duct has internal threads, and one end of the fastener abuts against the upper end face of the fixed scroll and the other end of the fastener is in threaded connection with the duct.

Preferably, a lubricating layer for reducing friction with the fitting is present on the inner wall of the mounting portion.

The invention also provides a pump body assembly which comprises a support, a movable scroll, a fixed scroll and the anti-rotation structure, wherein the movable scroll is attached to the upper end face of the support and the lower end face of the fixed scroll.

Preferably, the bracket is provided with a first oil passage communicated with an oil pool in the bracket, and the first oil passage is used for supplying oil between the bracket and the movable scroll.

Preferably, the first oil passage includes a first end surface oil passage and a supply oil passage, wherein: the first end face oil path is positioned on the upper end face of the support and extends horizontally, the oil supply path is arranged obliquely, the upper end of the oil supply path is connected with the first end face oil path, and the lower end of the oil supply path is connected with the oil pool.

Preferably, the movable scroll is provided with a second oil passage communicated with the first oil passage, and the second oil passage is used for supplying oil between the movable scroll and the fixed scroll.

Preferably, the second oil passage comprises a second end face oil passage and a longitudinal oil passage which are communicated with each other, wherein:

the longitudinal oil way penetrates through the upper end face and the lower end face of the movable scroll plate and is communicated with the first oil way channel, and the second end face oil way is positioned on the upper end face of the movable scroll plate and extends horizontally.

Preferably, the part of the first oil passage on the upper end surface of the support and the part of the second oil passage on the upper end surface of the movable scroll are Y-shaped or crescent-shaped.

The invention also provides a compressor, which comprises the pump body assembly.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the anti-rotation structure provided by the invention, the mounting part is arranged on the movable scroll plate, the assembly part is arranged on the bracket, the rotation of the mounting part is limited by the assembly part to prevent the movable scroll plate from rotating, and the structure is simple and compact; the structure omits a cross slip ring structure, and the cross slip ring is prevented from being eccentric due to the shearing force; move the vortex dish and can directly laminate in the support setting, increased the area of contact who moves vortex dish and support, prevent to move the vortex dish and topple, move the vortex dish operation comparatively steady, the structure is more stable.

2. The pump body assembly provided by the invention has the advantages that the operation of the movable scroll is more stable and the structure of the pump body assembly is stable due to the anti-autorotation structure.

3. The compressor provided by the invention has the advantages of stable structure and stable operation of the compressor due to the pump body assembly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of an anti-rotation structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the pump block assembly of the present invention;

FIG. 3 is a schematic top view of the pump block assembly;

FIG. 4 is a schematic structural view of a movable scroll;

FIG. 5 is a schematic structural view of a stent;

FIG. 6 is a schematic diagram of the oil path structure on the bracket;

fig. 7 is a schematic view of an end-face oil passage structure on the orbiting scroll.

In the figure 1, a movable scroll; 11. an installation site; 12. a lubricating layer; 13. a second oil passage; 131. a second end face oil way; 132. a longitudinal oil path;

2. a support; 21. an assembly site; 211. a duct; 22. an oil sump; 23. a first oil passage; 231. a supply oil path; 232. a first end face oil passage;

3. a fixed scroll;

4. a crankshaft;

5. a fastener.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the equipment or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the prior art, the structure for preventing the movable scroll from rotating is generally an oldham ring arranged between the support and the movable scroll, wherein one group of keys on the oldham ring are in fit contact with key slots on the movable scroll, the other group of keys are in fit contact with key slots on the fixed scroll, and when the movable scroll revolves around the fixed scroll for translation, the keys on the oldham ring can do reciprocating linear motion along the key slots corresponding to the fit. The cross slip ring with the structure is easy to be subjected to shearing force, so that eccentric wear is caused; the movable scroll plate is not directly contacted with the bracket and is easy to overturn during operation; the two aspects result in unstable operation of the movable scroll during revolution and translation around the fixed scroll.

Example 1

In view of the above problems, referring to fig. 1 and 2, the present embodiment provides an anti-rotation structure including a mounting portion 11 on a orbiting scroll 1 and an assembling portion 21 on a bracket 2, wherein: the assembly part 21 extends into the mounting part 11 and allows the mounting part 11 to rotate at the periphery thereof, and the assembly part 21 can always abut against different positions of the inner wall of the mounting part 11 when the movable scroll 1 is positioned at the upper end of the bracket 2 and revolves around the fixed scroll 3 so as to limit the rotation of the movable scroll 1.

Specifically, as in the related art, the orbiting of the orbiting scroll 1 around the fixed scroll 3 means that the central axis of the orbiting scroll revolves around the central axis of the fixed scroll.

For structural stability, the mounting portion 11 is an integrally formed portion of the movable scroll 1, and the mounting portion 21 is an integrally formed portion of the bracket 2. The movement between the mounting portion 21 and the mounting portion 11 is a limited relative rotation.

After the assembly is completed, the mounting portion 11 and the assembly portion 21 are always in contact, and the matching structure of the mounting portion 11 and the assembly portion 21 can limit the rotation (rotation) of the mounting portion 11 around the axis of the mounting portion 11. Along with the revolution translation of the movable scroll 1, the contact position of the mounting part 11 and the assembling part 21 is changed continuously, and the normal movement of the movable scroll 1 is not influenced.

In the rotation preventing structure of the present embodiment, the mounting portion 11 is provided on the orbiting scroll 1, the mounting portion 21 is provided on the holder 2, and the rotation of the mounting portion 11 is restricted by the mounting portion 21 to prevent the orbiting scroll 1 from rotating. The structure omits a cross slip ring structure, and the cross slip ring is prevented from being eccentric due to the shearing force; move vortex dish 1 and can directly laminate in support 2 setting, increased the area of contact who moves vortex dish 1 and support 2, prevent to move vortex dish 1 and topple, move vortex dish 1 and move comparatively steadily, the structure is more stable.

In addition to this, in order to enable the mounting location 11 to be rotated outside the fitting location 21 and to abut different positions of the inner wall of the mounting location 11 during the rotation. As shown in fig. 1 and 2, a movement space exists between the mounting portion 21 and the mounting portion 11.

This motion space compares in the enclosed construction of reciprocal linear motion between key and the keyway, and the lubricating oil of being convenient for of its inside gets into, prevents that the condition of the few, the local wear of oil feed from taking place.

In the present embodiment, a specific embodiment of the mounting portion 11 and the assembling portion 21 is given, and as an alternative embodiment, referring to fig. 1 to 4, the mounting portion 11 is a hole, and the inner wall of the hole is always abutted to the outer wall of the assembling portion 21. In other words, the inner wall of the hole always has an abutting position to be engaged with the mounting portion.

Specifically, the central axis of the hole rotates around the central axis of the mounting portion 21 when the orbiting scroll 1 orbits around the fixed scroll 3.

I.e., the central axis of each hole (mounting site 11) is disposed non-collinear with the central axis of the mounting site 21.

The holes are round holes, and the holes are used as mounting positions 11, so that the structure is simple and the arrangement is convenient. The inner wall of the hole abuts against the assembly part 21, and the shape of the hole is convenient for the outer wall of the assembly part 21 to limit the rotation of the hole by taking the axis of the hole as the axis.

As an alternative embodiment, the mounting location 21 is a pin that extends into the hole, as shown in fig. 1, 2 and 5.

In order to ensure the stability of the movement of the movable scroll 1, the pin is cylindrical. When the movable scroll revolves around the fixed scroll, the inner wall of the hole is always abutted against the inner wall of the pin to restrict the rotation of the hole (i.e., the rotation of the movable scroll).

When the orbiting scroll 1 revolves around the fixed scroll 3 at the upper end of the bracket 2, the central axis of the hole revolves around the central axis of the hole. With the structure, when the movable scroll 1 tends to rotate, the outer wall of the pin can limit the rotation of the hole in the movable scroll 1, namely limit the rotation of the movable scroll 1, so that the movable scroll 1 is ensured to rotate by taking the central shaft of the fixed scroll 3 as the axis, and the movable scroll 1 is prevented from rotating by taking the axis of the movable scroll 1 as the central shaft so as to be matched with the fixed scroll 3 to compress a working medium.

For structural stability, as an alternative embodiment, referring to fig. 1 and 5, the number of the fitting sites 21 is plural, and all the fitting sites 21 are arranged on the outer periphery of the upper end face of the bracket 2.

In the figure, four fitting portions 21 are arranged at intervals on the upper end face of the holder 2, and are not limited to this specific shape (at least two). The mounting portions 11 correspond to the positions and the number of the fitting portions 21.

Referring to fig. 4 and 5, the mounting portions 21 are arranged at two sets disposed opposite to each other on the outer periphery of the bracket 2, and the mounting portions 11 are arranged at two sets disposed opposite to each other on the outer periphery of the orbiting scroll 1. When the orbiting scroll 1 orbits and translates around the fixed scroll 3, see fig. 2, the contact points of the pins in the set of holes, which are arranged opposite to each other, and the holes are all located on the same side of the central axis of the holes.

Through the cooperation of support 2 and the outer periphery of movable scroll 1, can make movable scroll 1 more stable around the motion of static scroll 3.

As an alternative embodiment, referring to fig. 4, the mounting portion 11 is a through hole provided on the outer periphery of the orbiting scroll 1.

The pin on the bracket 2 can pass through the through hole to prevent the pin from separating from the hole, thereby ensuring the stability of the structure.

In order to ensure the structural stability, as an alternative embodiment, referring to fig. 3 and 7, a center line located at the center of all the mounting locations 11 is arranged in line with the central axis of the orbiting scroll 1.

The mounting part 11 (hole) moves synchronously with the rotation of the movable scroll 1, and the operation is stable. As an alternative embodiment, referring to fig. 3 and 5, the center lines at the center positions of all the mounting locations 21 are arranged in line with the central axis of the fixed scroll 3. In other words, the center lines of all the fitting locations are disposed non-collinear with the center lines of all the mounting locations.

Because the mounting portion 11 (hole) moves around the central axis of the fixed scroll 3, the above-mentioned fitting structure enables the mounting portion 11 (hole) to move around the central axis of the mounting portion 21 outside the corresponding mounting portion 21 (pin), so that the outer wall of the pin can abut against the inner wall of the hole, and the movable scroll 1 is difficult to rotate due to the abutting limit action of the pin.

As an alternative embodiment, with reference to figures 1, 2 and 5, there is a passage 211 in the assembly portion 21, and a fastener 5 extends through the fixed scroll 3 into the passage 211 and locks the fixed scroll 3 and the bracket 2.

By means of the structure of the assembly part 21 (pin), a pore passage 211 is directly arranged in the pin, and the fastening of the bracket 2 and the fixed scroll 3 is realized by the matching structure of the pore passage 211 and the fastening piece 5; unnecessary connecting structure and unnecessary connecting space are not needed, and the structure is simple and compact. The fastener 5 may be a bolt or the like.

As an alternative embodiment, referring to fig. 2, there is an internal thread on the orifice 211, and one end of the fastening member 5 abuts against the upper end surface of the fixed scroll 3 and the other end is screwed with the orifice 211. Wherein the fastening member 5 may be a bolt with a nut.

A through hole for allowing a pin to pass therethrough is formed in the fixed scroll 3 at a position corresponding to the hole 211 of the bracket 2, and as shown in fig. 2, the fastening member 5 is screwed to the pin passing through the through hole. And after the assembly is in place, the movable scroll 1 is tightly attached to the upper end surface of the bracket 2 under the pressure of the fixed scroll 3, and the connecting structure is stable.

When in compression, the movable scroll 1 is pressed on the end face of the bracket 2 under the action of axial gas force. Because the movable disk is integrally attached to the end face of the bracket 2, the operation is stable, and the overturning phenomenon caused by unstable gas force is effectively reduced.

As an alternative embodiment, in conjunction with fig. 1 and 4, a lubricating layer 12 for reducing friction with the assembly is present on the inner wall of the mounting portion 11. The above-mentioned lubricating layer 12 may be formed by a self-lubricating material such as a lubricating oil or the like.

The side wall of the hole (mounting portion 11) can reduce the contact friction force by adding a self-lubricating material. The self-lubricating material can be fixed on the inner wall of the hole in an electroplating or embedding mode.

Example 2

The present embodiment provides a pump body assembly, referring to fig. 1 and 2, including a bracket 2, a movable scroll 1, a fixed scroll 3 and the above-mentioned anti-rotation structure, wherein the movable scroll 1 is attached to the upper end surface of the bracket 2 and the lower end surface of the fixed scroll 3.

The movable scroll 1 is driven by the crankshaft 4 to rotate around the central axis of the fixed scroll 3 (while the central axis of the mounting portion 11 rotates around the central axis of the pin) to perform orbital translation, and forms a compression cavity with a variable volume with the fixed scroll 3. With the continuous rotation of the crankshaft 4, the whole process of air suction, compression and exhaust is realized between the movable scroll 1 and the fixed scroll 3. The movable scroll 1 is matched with the static scroll 3 after being constrained by a pin, and is locked and fixed by a fastener 5 to form a closed compression cavity.

The pump body assembly of this embodiment owing to possess above-mentioned rotation structure of preventing, so have the same and move vortex 1 and move more steadily, prevent to topple, pump body assembly stable in structure's advantage.

In the prior art, the structure of the cross sliding ring with the key matched with the key groove is closed, so that oil supply between adjacent parts is less, and the cross sliding ring is easy to wear. In this embodiment, the structure of the cross slip ring is eliminated, and the existing friction pair further includes: a friction pair formed between the bracket 2 and the movable scroll 1 and a friction pair formed between the movable scroll 1 and the fixed scroll 3. Compared with the existing cross slip ring structure, the friction pair is reduced.

The contact area of the end surfaces of the movable scroll 1 and the bracket 2 is large, and the movable scroll can be more stable and prevent overturning during operation, but has motion resistance. In view of the above, the bracket 2 of the present embodiment has a first oil passage 23 communicating with the oil sump 22 therein for supplying oil between the bracket 2 and the orbiting scroll 1.

Referring to fig. 2, the oil sump 22 is connected to an oil supply passage in the crankshaft 4 to supply oil to a first oil passage 23. The oil sump 22 is a part in the prior art and will not be described in detail herein. The first oil passage 23 can lubricate a friction pair between the support 2 and the movable scroll 1, reduces abrasion between the support and the movable scroll due to large friction force, prolongs the service life and ensures structural stability.

As an alternative embodiment, with reference to fig. 1, 5, and 6, the first oil passage 23 includes a first end-face oil passage 232 and a supply oil passage 231, in which: the first end surface oil passage 232 is located at the upper end surface of the bracket 2 and extends horizontally, the supply oil passage 231 is arranged obliquely (see fig. 6), the upper end thereof is connected with the first end surface oil passage 232, and the lower end thereof is connected with the oil pool 22.

Under the rotation of the crankshaft 4, the oil pool 22 at the tail part of the movable scroll 1 is driven to stir, so that the lubricating oil is fully supplied, the refrigerating oil is ensured to be filled in the oil supply path 231, the refrigerating oil is continuously supplied to the first end surface oil path 232, and the lubrication between the movable disc and the bracket 2 is realized.

Because the compression cavity belongs to a closed cavity, a sealing relation exists between the movable scroll 1 and the fixed scroll 3, and a friction pair also exists, so as to ensure good contact lubrication, on the basis of the structure, as an optional implementation mode, a second oil path channel 13 communicated with the first oil path channel 23 is arranged on the movable scroll 1 and is used for supplying oil between the movable scroll 1 and the fixed scroll 3.

The second oil passage 13 can introduce the lubricating oil in the bracket 2, and fully realizes the lubrication of the friction pair of the end surface of the movable scroll 1 and the end surface of the fixed scroll 3.

As an alternative embodiment, as shown in fig. 2, 4 and 5, the second oil passage 13 includes a second end-face oil passage 131 and a longitudinal oil passage 132 that communicate with each other, in which:

the longitudinal oil passage 132 penetrates the upper end surface and the lower end surface of the orbiting scroll 1 and is communicated with the first oil passage 23, and the second end surface oil passage 131 is positioned on the upper end surface of the orbiting scroll and extends horizontally.

As an alternative embodiment, the longitudinal oil passage 132 is vertically disposed to connect the first end surface oil passage 232 and the second end surface oil passage 131.

When the lubricating oil in the oil pool 22 of the bracket 2 is excessive, the lubricating oil flows in through the longitudinal oil path 132 on the movable scroll 1 through the first end surface oil path 232 and then enters the second end surface oil path 131, so that the movable scroll 1 and the fixed scroll 3 are lubricated, and the problems of abrasion and the like caused by oil shortage of parts are solved.

The oil passages are communicated, so that oil can be supplied to the space between the two friction pairs from the oil pool 22 in the bracket 2.

As an alternative embodiment, the portion of the first oil passage 23 located on the upper end surface of the bracket 2 and the portion of the second oil passage 13 located on the upper end surface of the movable scroll 1 are Y-shaped or crescent-shaped.

Specifically, in this embodiment, the first end surface oil passage 232 on the holder 2 and the second end surface oil passage 131 on the orbiting scroll 1 both have a Y shape or a crescent shape, and the main purpose is to extend the lubricating oil supply time and the oil supply amount in the operating range of the orbiting scroll 1. Of course, the oil passages on the two end surfaces can also adopt other shapes.

Example 3

The embodiment provides a compressor, in particular to a scroll compressor, which comprises the pump body assembly.

The compressor that this embodiment provided, owing to possess above-mentioned pump body subassembly, so have stable in structure, compressor operation steady advantage.

The particular features, structures, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides an anti-rotation structure which characterized in that, is including the installation position that is located on the vortex dish that moves and the assembly position that is located the support, wherein:

2. The rotation preventing structure according to claim 1, wherein the mounting portion is a hole, and an inner wall of the hole is always abutted against an outer wall of the fitting portion.

3. The autorotation prevention structure as claimed in claim 2 wherein the fitting points are pins extending into the holes.

4. The autorotation prevention structure according to claim 1 wherein all the fitting points are arranged on the periphery of the upper end face of the bracket.

5. The rotation preventing structure according to any one of claims 1 to 4, wherein the mounting portion is a through hole provided in an outer periphery of the orbiting scroll.

6. The rotation preventing structure according to any one of claims 1 to 4, wherein a center line located at a center of all the mounting portions is arranged in line with a central axis of the orbiting scroll.

7. The rotation preventing structure according to claim 6, wherein a center line at a center position of all the fitting portions is provided in line with a central axis of the fixed scroll.

8. The autorotation prevention structure according to claim 1 or 2 wherein a hole is formed in the assembly part and a fastener extends through the fixed scroll into the hole and locks the fixed scroll and the bracket.

9. The autorotation prevention structure according to claim 8 wherein an internal thread is present on the port, and one end of the fastener abuts against the upper end face of the fixed scroll and the other end is in threaded connection with the port.

10. The rotation preventing structure according to claim 1 or 2, wherein a lubricating layer for reducing a frictional force with the fitting is provided on an inner wall of the mounting portion.

11. A pump body assembly, characterized by comprising a bracket, a movable scroll, a fixed scroll and the anti-rotation structure of any one of claims 1 to 10, wherein the movable scroll is attached to the upper end surface of the bracket and the lower end surface of the fixed scroll.

12. The pump body assembly of claim 11, wherein said bracket has a first oil passage communicating with an oil sump therein for supplying oil between said bracket and said orbiting scroll.

13. The pump body assembly according to claim 12, wherein the first oil passage includes a first end face oil passage and a supply oil passage, wherein: the first end face oil path is positioned on the upper end face of the support and extends horizontally, the oil supply path is arranged obliquely, the upper end of the oil supply path is connected with the first end face oil path, and the lower end of the oil supply path is connected with the oil pool.

14. The pump body assembly according to claim 12, wherein a second oil passage communicating with the first oil passage is present in the orbiting scroll for supplying oil between the orbiting scroll and the fixed scroll.

15. The pump body assembly of claim 14, wherein the second oil passage includes a second end face oil passage and a longitudinal oil passage in communication, wherein:

16. The pump body assembly according to claim 14 or 15, wherein a portion of the first oil passage located on the upper end surface of the bracket and a portion of the second oil passage located on the upper end surface of the orbiting scroll are Y-shaped or crescent-shaped.

17. A compressor, comprising a pump body assembly according to any one of claims 11 to 16.