Guide ring and scroll compressor

Abstract

The invention relates to a guide ring and a scroll compressor. According to one aspect of the invention, the guide ring is provided, the guide ring is used for limiting a fixed scroll of the scroll compressor, the guide ring comprises a body, the body is in a circular ring shape, and the inner surface of the body defines a functional surface of the guide ring; the guide ring comprises a body and a guide ring fastening hole, the guide ring fastening hole is constructed to penetrate through the body so that a fastener for fixing the guide ring can penetrate through the guide ring fastening hole, a boss is arranged on the top surface of the body of the guide ring, a boss fastening hole aligned with the guide ring fastening hole is formed in the boss, and the diameter of the inner surface of the boss is larger than that of the functional face of the guide ring. The boss of the guide ring can help to reduce the deformation of the functional surface of the guide ring under the condition that the guide ring is subjected to the pre-tightening force of a fastener.

Description

Technical Field

[0001] The present invention relates to the field of scroll compressors, and in particular to a guide ring for limiting the position of a fixed scroll of a scroll compressor. Background Art

[0002] The contents in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] In a scroll compressor, a guide ring is usually used to limit the fixed scroll of the scroll compressor. Specifically, the guide ring can limit the movement of the fixed scroll in the radial direction, but allows the fixed scroll to move in the axial direction to a certain extent. Figure 1 The structure and working principle of the guide ring of the related art are described.

[0004] Figure 1 FIG. 1 shows a perspective view of a guide ring of the related art. Figure 1 The guide ring 1 shown includes a body 2 in the shape of an annulus and a leg 3 extending vertically from the bottom surface of the body 2, wherein the inner surface of the body 2 defines a functional surface of the guide ring 1, which can be used to cooperate with the fixed scroll. The guide ring 1 also includes a fastening hole 4 configured to pass through the body 2 and the leg 3. In the process of assembling the guide ring to the scroll compressor, the guide ring is first placed on the main bearing seat (not shown) of the scroll compressor, and then the guide ring is fixed to the main bearing seat by fasteners passing through the fastening hole and the fastening hole provided on the main bearing seat. In the assembled state of the scroll compressor, the fixed scroll (not shown) is arranged on the radial inner side of the guide ring so that the guide ring surrounds the fixed scroll, so that the guide ring can limit the fixed scroll. In addition, there is a certain gap between the functional surface of the guide ring and the outer surface of the fixed scroll to allow the fixed scroll to move in the axial direction to a certain extent.

[0005] The main problem with the guide ring in the related art is that, when assembled, it is easily deformed by the preload of the fasteners. Specifically, this causes the functional surface of the guide ring to shrink inward, reducing or even eliminating the gap between the functional surface of the guide ring and the outer surface of the fixed scroll. This hinders the axial movement of the fixed scroll and affects the normal operation of the scroll compressor. Furthermore, deformation of the guide ring can easily cause the guide ring body to fracture, further affecting the reliability of the scroll compressor.

[0006] Therefore, there is a need for an improved guide ring that can reduce deformation when subjected to the pre-tightening force of the fastener, especially reduce the deformation of the functional surface of the guide ring, thereby reducing the risk of the fixed scroll being stuck by the guide ring and avoiding the guide ring from breaking, so as to achieve the purpose of improving the operating reliability of the scroll compressor. Summary of the Invention

[0007] A general summary of the application is presented in this section, but not an extensive overview of the application as a whole or all of the features of the application.

[0008] An object of the present application is to solve or alleviate one or more of the above-mentioned technical problems.

[0009] An object of the present application is to reduce deformation of the guide ring under a pre-tightening force of a fastener and to reduce the risk of breakage of the guide ring. Also, the guide ring of the present application has a simple structure, is easy to install, and can achieve the above-mentioned objects at a lower cost.

[0010] To solve one or more of the above-mentioned technical problems, according to an aspect of the present application, there is provided a guide ring for positioning a fixed scroll of a scroll compressor, the guide ring comprising: a body in a circular ring shape and an inner surface of the body defining a functional surface of the guide ring; and a guide ring fastening hole configured to pass through the body for a fastener for fixing the guide ring to pass through, wherein a boss is provided on a top surface of the body of the guide ring, the boss having a boss fastening hole aligned with the guide ring fastening hole, and wherein an inner surface of the boss has a diameter greater than a diameter of the functional surface of the guide ring.

[0011] In the above-described guide ring, the boss includes a plurality of bosses separated from each other.

[0012] In the above-described guide ring, an outer side portion and / or an inner side portion of the boss is provided with a rigidity-weakened portion.

[0013] In the above-described guide ring, the rigidity-weakened portion of the boss is configured as a sawtooth structure portion.

[0014] In the above-described guide ring, the boss is configured as a ring structure.

[0015] In the above-described guide ring, the ring structure includes a plurality of hollowed-out portions uniformly distributed in a circumferential direction.

[0016] In the above-described guide ring, the functional surface of the guide ring is provided with a material-removed portion at a position corresponding to the guide ring fastening hole in a circumferential direction, such that the material-removed portion has a diameter greater than a diameter of a remaining portion of the functional surface.

[0017] According to another aspect of the present application, there is provided a guide ring for positioning a fixed scroll of a scroll compressor, the guide ring comprising: a body in a circular ring shape and an inner surface of the body defining a functional surface of the guide ring; a guide ring fastening hole configured to pass through the body for a fastener for fixing the guide ring to pass through, wherein a boss is provided on a top surface of the body of the guide ring, the boss having a boss fastening hole aligned with the guide ring fastening hole, and wherein an outer side portion of the boss is provided with a rigidity-weakened portion.

[0018] In the above guide ring, the inner side portion of the boss is provided with a rigidity-weakened portion.

[0019] In the above guide ring, the rigidity-weakened portion of the boss is configured as a sawtooth structure portion.

[0020] In the above guide ring, the functional surface of the guide ring is provided with a material-removed portion at a position corresponding to the guide ring fastening hole in the circumferential direction, so that the diameter of the material-removed portion is greater than that of the remaining portion of the functional surface.

[0021] According to another aspect of the present application, there is provided a guide ring for limiting the orbiting scroll of a scroll compressor, the guide ring comprising: a body in the shape of a circular ring and an inner surface of the body defining a functional surface of the guide ring; a guide ring fastening hole configured to pass through the body for a fastener of the guide ring to pass through, wherein a boss is provided on a top surface of the body of the guide ring, the boss being provided with a boss fastening hole aligned with the guide ring fastening hole, wherein the boss is in a separate structure from the body of the guide ring, and the boss provides a rigid contact so that the pre-tightening force of the fastener can be uniformly transmitted to the body of the guide ring through the boss.

[0022] In the above guide ring, the boss comprises a plurality of bosses separated from each other, and the contact area of the boss with the top surface of the body of the guide ring is greater than the area of the head of the fastener with the contact surface of the boss.

[0023] In the above guide ring, the boss is configured in the shape of a ring.

[0024] In the above guide ring, the functional surface of the guide ring is provided with a material-removed portion at a position corresponding to the guide ring fastening hole in the circumferential direction, so that the diameter of the material-removed portion is greater than that of the remaining portion of the functional surface.

[0025] According to another aspect of the present application, there is also provided a compressor comprising the guide ring as described above.

[0026] The advantages of the guide ring and the related scroll compressor according to the present application are, for example, as follows. The guide ring according to the present application has a boss structure which can help to reduce the deformation of the guide ring, especially the deformation of the functional surface, in the case that the guide ring is subjected to the pre-tightening force of the fastener, thereby reducing or even eliminating the hindrance of the deformation of the functional surface of the guide ring to the movement of the orbiting scroll in the axial direction, and reducing or even avoiding the risk of the guide ring being broken. In addition, the guide ring according to the present application is simple in structure, easy to manufacture, and can ensure the normal operation of the compression mechanism of the scroll compressor at a low cost. BRIEF DESCRIPTION OF DRAWINGS

[0027] The following drawings show the technical features of the guide ring of the related art and one or more embodiments of the guide ring of the present application, in which:

[0028] Figure 1 It is a three-dimensional diagram of a guide ring of the related art;

[0029] Figure 2 is a perspective view of a guide ring according to a first embodiment of the present invention;

[0030] Figure 3 is an enlarged view of a boss of a guide ring according to a first embodiment of the present invention;

[0031] Figure 4 is a perspective view of a guide ring according to a second embodiment of the present invention;

[0032] Figure 5 is a front view of a guide ring according to a second embodiment of the present invention;

[0033] Figure 6 is a perspective view of a guide ring according to a third embodiment of the present invention;

[0034] Figure 7 is an enlarged view of a boss of a guide ring according to a third embodiment of the present invention; and

[0035] Figure 8 is a perspective view of a guide ring according to a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to the accompanying drawings and with reference to specific embodiments. The following detailed description of the present invention is for illustrative purposes only and is by no means intended to limit the present invention and its applications or uses.

[0037] The present invention provides an improved guide ring for limiting the fixed scroll of a scroll compressor. The guide ring has an improved structure to reduce its deformation under the pre-tightening force of a fastener, especially the deformation of the functional surface of the guide ring.

[0038] First, refer to Figure 2 and Figure 3 The overall configuration and operating principle of the guide ring according to the first embodiment of the present invention are briefly described.

[0039] Figure 2 is a perspective view of a guide ring according to a first embodiment of the present invention, and Figure 3 1 is an enlarged view of the boss of the guide ring according to the first embodiment of the present invention. Figure 2 and Figure 3 A guide ring according to a first embodiment of the present invention will be described.

[0040] like Figure 2As shown, the guide ring 10 according to the first embodiment of the present application comprises a body 11 in the shape of a circular ring and guide ring fastening holes configured to pass through the body 11 for fixing a fastener of the guide ring to pass through, so as to fix the guide ring in the scroll compressor. The fastener can be, for example, a bolt or a pin. The inner surface 111 of the body 11 of the guide ring 10 defines a functional surface for cooperating with the outer surface of the fixed scroll and plays a role of limiting the fixed scroll. Optionally, the guide ring 10 can further comprise a leg 12 vertically extending from the bottom surface of the body 11, wherein the leg 12 is used to rest in the main bearing seat of the scroll compressor, and a fastening hole aligned with the guide ring fastening hole is provided in the leg 12 for the fastener to pass through, so as to fix the guide ring 10 to the main bearing seat of the scroll compressor. The inner surface 121 of the leg 12 is more outward in the radial direction relative to the inner surface 111 of the body 11, so that the diameter of the inner surface 121 of the leg 12 is greater than the diameter of the inner surface 111 of the body 11. Thus, the leg 12 does not play a role of limiting the fixed scroll. The guide ring 10 further comprises a boss 14 provided on the top surface of the body 11, which can comprise a plurality of bosses separated from each other, for example, four bosses in this embodiment. Each boss 14 is positioned at a position corresponding to the guide ring fastening hole in the circumferential direction of the guide ring 10, and a boss fastening hole 15 aligned with the guide ring fastening hole is provided in each boss 14. Thus, the pre-tightening force of the fastener will directly act on the boss. The boss 14 can be integral with the body 11, and the inner surface 141 of the boss 14 can be more outward in the radial direction relative to the inner surface 111 of the body 11, so that the diameter of the inner surface 141 of the boss 14 is greater than the diameter of the inner surface 111 of the body 11. That is, the inner surface of the boss does not serve as a functional surface. Thus, the influence of the deformation of the boss on the movement of the fixed scroll can be reduced or even eliminated. Preferably, the boss 14 can be provided with a rigidity weakening portion, for example, a sawtooth structure, on the outer surface thereof, which will be described below with reference to Figure 3 The rigidity weakening portion will be described in more detail.

[0041] Figure 3 is an enlarged view of the boss of the guide ring according to the first embodiment of the present application, wherein the rigidity weakening portion provided on the outer side of the boss 14 of the guide ring 10 is shown. In this embodiment, the rigidity weakening portion of the boss 14 is configured as a sawtooth structure 16. The sawtooth structure 16 of the boss 14 comprises protrusions and grooves located between adjacent protrusions. The sawtooth structure of the boss can weaken the rigidity of the outer side of the boss, so that in the case that the guide ring is subjected to the pre-tightening force of the fastener, the fastener has a tendency to tilt outwardly and the sawtooth structure deforms greatly, thereby reducing the deformation of the functional surface of the guide ring.

[0042] The working principle and the technical effects obtained by the guide ring according to the first embodiment of the present application will be described below.

[0043] In the assembled state of the scroll compressor, the guide ring according to the first embodiment of the present application is fixedly assembled to the main bearing seat by the fastener passing through the boss fastening hole, the guide ring fastening hole and the fastening hole provided on the main bearing seat of the scroll compressor. In the assembled state, the guide ring is subjected to the pre-tightening force of the fastener. Since the guide ring has the boss, in particular, the boss has the rigidity-weakened portion, i.e. the sawtooth structure portion, provided at the outer side portion of the boss, the outer side portion of the boss has a smaller rigidity than the inner side portion, thus the fastener will have a tendency to tilt outwardly, thereby making the rigidity-weakened portion of the boss generate a larger deformation. In this case, the deformation generated at the inner side of the guide ring will be further reduced, thereby reducing the deformation of the functional surface of the guide ring. Compared with the guide ring of the related art, the guide ring according to the first embodiment of the present application has the advantage that the guide ring has the boss, and the boss has the rigidity-weakened portion provided at the outer side portion thereof, so that in the case that the guide ring is subjected to the pre-tightening force of the fastener, the rigidity-weakened portion of the boss generates a larger deformation, the deformation of the functional surface of the guide ring is reduced, the inward contraction of the functional surface of the guide ring is reduced or even avoided, the risk that the gap between the guide ring and the fixed scroll is reduced or even disappears, so as to hinder the movement of the fixed scroll in the axial direction. Moreover, the risk of the breakage of the body of the guide ring can be reduced or even avoided. In addition, the structure of the boss of the guide ring according to the first embodiment of the present application is simple, easy to manufacture, and can ensure the normal operation of the compression mechanism of the scroll compressor at a low cost.

[0044] Figure 4 is a perspective view of the guide ring according to the second embodiment of the present application, while Figure 5 is a front view of the guide ring according to the second embodiment of the present application. The guide ring according to the second embodiment of the present application will be described below with reference to Figure 4 and Figure 5 The guide ring according to the second embodiment of the present application is mainly different from the guide ring according to the first embodiment in the structure of the boss, while the other parts of the guide ring are basically the same, thus the boss of the guide ring will be mainly described, and the detailed description of the other parts of the guide ring will be omitted.

[0045] As Figure 4As shown, the guide ring 20 according to the second embodiment of the present application comprises a body 21 in the shape of a circular ring and a guide ring fastening hole configured to pass through the body 21. Optionally, the guide ring 20 can further comprise a leg 22 extending vertically from the bottom surface of the body 21. The inner surface 211 of the body 21 of the guide ring 20 defines a functional surface for cooperating with the outer surface of the orbiting scroll and plays a role of limiting the orbiting scroll. Optionally, the guide ring 20 can further comprise a leg 22 extending vertically from the bottom surface of the body 21, which does not play a role of limiting the orbiting scroll. The guide ring 20 further comprises a boss provided on the top surface of the body 21, which can be configured as a ring structure. The ring structure can comprise a plurality of hollows uniformly distributed in the circumferential direction, for example, a metal ring 24 with hollow features. As shown in the figure, the metal ring 24 is fixed to the body 21 of the guide ring 20 by means of a fastener passing through the guide ring fastening hole and the metal ring fastening hole 25. The metal ring 24 can be integrally formed with the body 21 of the guide ring 20. The inner surface 241 of the metal ring 24 can be radially outward relative to the inner surface 211 of the body 21 of the guide ring 20, so that the diameter of the inner surface 241 of the metal ring 24 is greater than the diameter of the inner surface 211 of the body 21 of the guide ring 20. Thus, the metal ring does not play a role of limiting the orbiting scroll, that is, the deformation of the metal ring will not affect the movement of the orbiting scroll. Figure 4 and Figure 5 As shown, in this embodiment, the hollow features of the metal ring 24 comprise diamond-shaped openings uniformly provided at the inner surface and the outer surface of the metal ring 24 in the circumferential direction of the metal ring 24 and spaces extending between the corresponding diamond-shaped openings, thereby reducing the rigidity of the metal ring 24, for example, so that the rigidity of the metal ring 24 is less than the rigidity of the body 21 of the guide ring 20. The metal ring 24 is provided with a metal ring fastening hole (i.e., boss fastening hole) 25 aligned with the guide ring fastening hole at a position corresponding to the guide ring fastening hole in the circumferential direction. The metal ring 24 can be separate from the body 21 and fixed to the body 21 by a fastener passing through the metal ring fastening hole 25 and the guide ring fastening hole. The inner surface 241 of the metal ring 24 can be radially outward relative to the inner surface 211 of the body 21, so that the diameter of the inner surface 241 of the metal ring 24 is greater than the diameter of the inner surface 211 of the body 21. Thus, the metal ring does not play a role of limiting the orbiting scroll, that is, the deformation of the metal ring will not affect the movement of the orbiting scroll.

[0046] The working principle and the technical effects obtained by the guide ring according to the second embodiment of the present application will be described below.

[0047] In the assembled state of the scroll compressor, the guide ring according to the second embodiment of the present invention is fixedly assembled to the main bearing seat by fasteners passing through the metal ring fastening hole, the guide ring fastening hole and the fastening hole provided on the main bearing seat of the scroll compressor. In the assembled state, the guide ring is subjected to the pre-tightening force of the fastener. And because the guide ring includes a metal ring, and in particular, the metal ring has a hollow feature and therefore has reduced rigidity, the metal ring can evenly share the load generated when the fastener is pre-tightened, so that the pre-tightening force is evenly distributed on the top surface of the guide ring body, thereby improving the deformation of the guide ring at the fastener installation position, so as to achieve the purpose of reducing the maximum deformation of the functional surface of the guide ring. Compared with the guide ring of the related art, the guide ring according to the second embodiment of the present invention has the advantages as follows: the guide ring includes an annular structure arranged on the top surface, such as a metal ring, and the annular structure has a certain flexibility, such as having a hollow feature uniformly distributed along the circumference, so that when the guide ring is subjected to the pre-tightening force of the fastener, the metal ring evenly shares the load, so that the pre-tightening force is evenly distributed on the top surface of the guide ring body, thereby reducing the maximum deformation of the functional surface of the guide ring, reducing or even avoiding the risk of the functional surface of the guide ring hindering the movement of the fixed scroll in the axial direction. Moreover, the risk of the guide ring body breaking can be reduced or even avoided. In addition, the guide ring according to the second embodiment of the present invention has a split metal ring, which can be fixed to the guide ring by fasteners. It has a simple structure and is easy to manufacture, and can ensure the normal operation of the compression mechanism of the scroll compressor at a low cost.

[0048] Figure 6 is a perspective view of a guide ring according to a third embodiment of the present invention, and Figure 7 FIG. 1 is an enlarged view of the boss of the guide ring according to the third embodiment of the present invention. Figure 6 and Figure 7 The guide ring according to the third embodiment of the present invention will be described. The main difference between the guide ring according to the third embodiment and the guide ring according to the first embodiment is that the position of the stiffness reducing portion of the boss is different, while the other parts of the guide ring are basically the same. Therefore, the stiffness reducing portion of the boss of the guide ring will be mainly described, and a detailed description of the other parts of the guide ring will be omitted.

[0049] like Figure 6As shown, the guide ring 30 according to the third embodiment of the present application includes a body 31 in the shape of a circular ring and a guide ring fastening hole configured to pass through the body 31. An inner surface 311 of the body 31 of the guide ring 30 defines a functional surface. Optionally, the guide ring 30 can further include a leg 32 extending vertically from a bottom surface of the body 31. The guide ring 30 further includes bosses 34 disposed on a top surface of the body 31, wherein each boss 34 is positioned at a location corresponding to the guide ring fastening hole in a circumferential direction of the guide ring 30, and each boss 34 is provided with a boss fastening hole 35 aligned with the guide ring fastening hole. An inner surface of the boss 34 can be more outward in a radial direction relative to the inner surface 311 of the body 31, such that a diameter of the inner surface of the boss 34 is greater than a diameter of the inner surface 311 of the body 31. In this way, the boss will not function as a stop for the fixed scroll. The boss 34 can be provided with a rigidity weakening portion, such as a sawtooth structure portion, on an inner side portion thereof, which will be described below with reference to FIG. 4. Figure 7 The rigidity weakening portion will be described in more detail.

[0050] Figure 7 is an enlarged view of a boss of a guide ring according to the third embodiment of the present application, wherein a rigidity weakening portion located at an inner side portion of the boss 34 of the guide ring 30 is shown. In this embodiment, the rigidity weakening portion of the boss 34 is configured as a sawtooth structure portion 36. The sawtooth structure portion 36 has similar structural features as the sawtooth structure portion 16 of the first embodiment, and thus will not be described in detail here. The sawtooth structure portion of the boss can weaken the rigidity of the inner side portion of the boss, such that in the case that the guide ring is subjected to a pre-tightening force of a fastener, the sawtooth structure portion is prone to a larger deformation, thereby reducing the deformation of the functional surface of the guide ring.

[0051] The working principle of the guide ring according to the third embodiment of the present application and the technical effects obtained thereby will be described below.

[0052] In the assembled state of the scroll compressor, the guide ring according to the third embodiment of the present application is fixedly assembled to the main bearing seat by the fastener passing through the boss fastening hole, the guide ring fastening hole and the fastening hole provided on the main bearing seat of the scroll compressor. In the assembled state, the guide ring is subjected to the pre-tightening force of the fastener. And since the guide ring has the boss, in particular, the boss has the rigidity-weakened portion, i.e. the sawtooth structure portion, provided at the inner side portion of the boss. In particular, since the inner side portion of the boss has smaller rigidity than the outer side portion, the inner side portion of the boss is prone to greater deformation, thereby reducing the deformation of the functional surface of the guide ring. Compared with the guide ring of the related art, the guide ring according to the third embodiment of the present application has the advantage that the guide ring has the boss, and the boss has the rigidity-weakened portion provided at the inner side portion thereof, so that in the case where the guide ring is subjected to the pre-tightening force of the fastener, the rigidity-weakened portion of the boss produces greater deformation, thereby reducing the deformation of the functional surface of the guide ring, reducing or even avoiding the inward contraction of the functional surface of the guide ring, resulting in the risk that the gap between the guide ring and the fixed scroll is reduced or even disappears, so as to hinder the movement of the fixed scroll in the axial direction. And, the risk of the breakage of the body of the guide ring can be reduced or even avoided. Furthermore, the guide ring according to the third embodiment of the present application has simple structure, is easy to manufacture, and can ensure the normal operation of the compression mechanism of the scroll compressor at low cost.

[0053] Figure 8 is a perspective view of the guide ring according to the fourth embodiment of the present application. The guide ring according to the fourth embodiment of the present application will be described below with reference to Figure 8 The guide ring according to the fourth embodiment of the present application is mainly different from the guide ring according to the first embodiment in the structure of the boss and the structure of the functional surface, and the other parts of the guide ring are basically the same, so the boss and the functional surface of the guide ring will be mainly described, and the detailed description of the other parts of the guide ring will be omitted.

[0054] As shown in Figure 8 , the guide ring 40 according to the fourth embodiment of the present application comprises a body 41 in the shape of a circular ring and a guide ring fastening hole configured to pass through the body 41. The inner surface 411 of the body 41 of the guide ring 40 defines a functional surface. Optionally, the guide ring 40 can further comprise a leg 42 vertically extending from the bottom surface of the body 41. The functional surface of the guide ring 40 is configured to be provided with a material cut-away portion 412 at the position corresponding to the guide ring fastening hole in the circumferential direction, the material cut-away portion 412 being recessed to the radial outer side of the guide ring 40 relative to the rest of the functional surface, so that the diameter of the material cut-away portion 412 is greater than the diameter of the rest of the functional surface. In the assembled state of the guide ring, the guide ring will bear greater load at the position corresponding to the fastening hole, and thus is more prone to deformation.

[0055] The working principle of the guide ring according to the fourth embodiment of the present application and the technical effects obtained will be described below.

[0056] In the assembled state of the scroll compressor, the guide ring according to the fourth embodiment of the present application is fixedly assembled to the main bearing seat by the fastener passing through the boss fastening hole, the guide ring fastening hole and the fastening hole provided on the main bearing seat of the scroll compressor. In the assembled state, the guide ring is subjected to the pre-tightening force of the fastener. And, since the material cutaway portion is provided on the functional surface of the guide ring at the position corresponding to the guide ring fastening hole so that the material cutaway portion is recessed to the radial outer side, even if the guide ring is subjected to a larger load at the position corresponding to the guide ring fastening hole and generates a deformation in the radial inward direction, it will not cause an interference between the guide ring and the fixed scroll so as to hinder the movement of the fixed scroll in the axial direction. That is, the material cutaway portion of the functional surface can reduce or even eliminate the influence of the deformation of the functional surface caused by the pre-tightening force of the fastener. In addition, the guide ring according to the fourth embodiment of the present application has the material cutaway portion on the functional surface of the guide ring, which has a simple structure and is easy to manufacture, and can ensure the normal operation of the compression mechanism of the scroll compressor at a low cost. The material cutaway portion in the present embodiment can be implemented alone or in combination with the boss in the above or below embodiments.

[0057] The guide ring according to the fifth embodiment of the present application will be described below. The guide ring according to the fifth embodiment is mainly different from the guide ring according to the first embodiment in the structure and material of the boss, and the other parts of the guide ring are basically the same, so the boss of the guide ring will be mainly described, and the detailed description of the other parts of the guide ring will be omitted.

[0058] The guide ring according to the fifth embodiment of the present application comprises a body in the shape of a circular ring and a guide ring fastening hole configured to pass through the body. An inner surface of the body of the guide ring defines a functional surface. Optionally, the guide ring can further comprise a leg vertically extending from a bottom surface of the body. The guide ring further comprises a boss provided on a top surface of the body. The boss is separate from the body of the guide ring, and the boss provides rigid contact so that the pre-tightening force of the fastener can be uniformly transmitted to the body of the guide ring through the boss. The boss can comprise a plurality of bosses separate from each other, or the boss can be configured in the shape of a ring, such as a metal ring. The boss is provided with a boss fastening hole aligned with the guide ring fastening hole. When the boss comprises a plurality of bosses separate from each other, each boss is positioned at a position corresponding to the guide ring fastening hole in the circumferential direction of the guide ring. The boss can be made of a material with greater rigidity, such as so that the rigidity of the boss is greater than the rigidity of the body. In this way, in the case where the guide ring is subjected to the pre-tightening force of the fastener, due to the greater rigidity of the boss, the load can be uniformly applied to the top surface of the body of the guide ring in contact with the boss, thereby improving the deformation of the guide ring at the fastener mounting position, so as to achieve the purpose of reducing the maximum deformation of the functional surface of the guide ring. When the boss comprises a plurality of bosses separate from each other, the contact area of the boss with the top surface of the body of the guide ring is greater than the area of the contact surface of the head of the fastener with the boss.

[0059] The working principle and the technical effects obtained by the guide ring according to the fifth embodiment of the present application will be described below.

[0060] In the assembled state of the scroll compressor, the guide ring according to the fifth embodiment of the present application is fixedly assembled to the main bearing seat by the fastener passing through the boss fastening hole, the guide ring fastening hole and the fastening hole provided on the main bearing seat of the scroll compressor. In the assembled state, the guide ring is subjected to the pre-tightening force of the fastener. And due to the guide ring having the boss with greater rigidity, the pre-tightening force of the fastener can be more uniformly transmitted to the body of the guide ring through the boss, so as to achieve the purpose of reducing the deformation of the functional surface of the guide ring. And the risk of the body of the guide ring breaking can be reduced or even avoided. In addition, the guide ring according to the fifth embodiment of the present application is simple in structure and easy to manufacture, and can ensure the normal operation of the compression mechanism of the scroll compressor at low cost.

[0061] In addition, it should be noted that although different technical solutions of the guide ring according to the present application are described in the foregoing embodiments, it can be understood that the technical solutions in the above embodiments are only illustrative and not limiting, and various modifications can be made, such as described below.

[0062] The boss of the guide ring according to the first embodiment can not have the rigidity-weakened portion, but only need the diameter of the inner surface of the boss to be larger than the diameter of the inner surface of the body. Even in the case of not having the rigidity-weakened portion, the influence of the deformation of the boss on the movement of the fixed scroll can be reduced or eliminated due to the diameter of the inner surface of the boss being larger than the diameter of the inner surface of the body. The boss of the guide ring according to the first embodiment can be provided with the rigidity-weakened portion on both the inner side portion and the outer side portion. The functional surface of the guide ring according to the first embodiment can also have the material-removed portion as described in the fourth embodiment. The diameter of the inner surface of the boss of the guide ring according to the first embodiment can not need to be larger than the diameter of the inner surface of the body, but only need the outer side portion of the boss to be provided with the rigidity-weakened portion. In this case, since the outer side portion of the boss is provided with the rigidity-weakened portion, in the case where the guide ring is subjected to the pre-tightening force of the fastener, the outer side portion of the boss deforms greatly, and the load is closer to the outer side of the top surface of the body of the guide ring, so that the deformation of the functional surface of the guide ring is small.

[0063] While the present application has been described with reference to example embodiments, it will be understood by those skilled in the art that various changes can be made and equivalents can be substituted for elements thereof without departing from the scope of the application. In addition, many modifications can be made to adapt a particular situation or material to the teachings of the application without departing from its central scope. Therefore, it is intended that the application not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this application, but that the application will include all embodiments falling within the scope of the appended claims.

Claims

1. A guide ring (10) for limiting a fixed scroll of a scroll compressor, the guide ring comprising: a body (11) in the shape of a circular ring and an inner surface (111) of the body defining a functional surface of the guide ring; and a guide ring fastening hole configured to pass through the body for a fastener of the guide ring to pass through, characterized in that a boss (14) is arranged on a top surface of the body of the guide ring, the boss being provided with a boss fastening hole (15) aligned with the guide ring fastening hole, wherein an inner surface (141) of the boss has a diameter greater than that of the functional surface of the guide ring. The boss (14) comprises a plurality of bosses separated from each other.

2. The pilot ring of claim 1, wherein The outer side and / or inner side of the boss (14) is provided with a rigidity weakening portion.

3. The pilot ring of claim 1, wherein, The rigidity weakening portion of the boss is configured as a sawtooth structure (16).

4. The pilot ring of claim 3, wherein, The boss is configured as an annular structure.

5. The pilot ring of claim 1, wherein, The annular structure comprises a plurality of hollowed-out portions uniformly distributed in the circumferential direction.

6. The pilot ring of claim 5, wherein, The functional surface of the guide ring is provided with a material cut-out portion (412) at a position corresponding to the guide ring fastening hole in the circumferential direction, so that the diameter of the material cut-out portion is greater than that of the remaining portion of the functional surface.

7. The pilot ring (40) of claim 1, wherein 8. A guide ring (10) for limiting a fixed scroll of a scroll compressor, the guide ring comprising: a body (11) in the shape of a circular ring and an inner surface of the body defining a functional surface of the guide ring; and a guide ring fastening hole configured to pass through the body for a fastener of the guide ring to pass through, characterized in that a boss (14) is arranged on a top surface of the body of the guide ring, the boss being provided with a boss fastening hole aligned with the guide ring fastening hole, wherein an outer side of the boss is provided with a rigidity weakening portion. The inner side of the boss (14) is provided with a rigidity weakening portion.

9. The pilot ring of claim 8, wherein, The rigidity weakening portion of the boss is configured as a sawtooth structure (16).

10. A guide ring according to claim 8 or 9, characterized in that The functional surface of the guide ring is provided with a material cut-out portion at a position corresponding to the guide ring fastening hole in the circumferential direction, so that the diameter of the material cut-out portion is greater than that of the remaining portion of the functional surface.

11. A guide ring according to claim 8 or 9, characterized in that 12. A guide ring for limiting a fixed scroll of a scroll compressor, the guide ring comprising: a body in the shape of a circular ring and an inner surface of the body defining a functional surface of the guide ring; and a guide ring fastening hole configured to pass through the body for a fastener of the guide ring to pass through, characterized in that a boss is arranged on a top surface of the body of the guide ring, the boss being provided with a boss fastening hole aligned with the guide ring fastening hole, wherein the boss is in a separate structure from the body of the guide ring, and the boss provides a rigid contact so that a pre-tightening force of the fastener can be uniformly transmitted to the body of the guide ring through the boss. ​ 13. The pilot ring of claim 12, wherein, The bosses include a plurality of bosses separated from each other, and a contact area of the bosses with a top surface of a body of the guide ring is greater than an area of a contact surface of the head of the fastener with the bosses.

14. The pilot ring of claim 12, wherein, The bosses are configured in an annular structure.

15. The guide ring of any one of claims 12 to 14, wherein, A functional surface of the guide ring is provided with a material cutout at a position corresponding to the guide ring fastening hole in a circumferential direction, such that a diameter of the material cutout is greater than a diameter of a remaining portion of the functional surface.

16. A scroll compressor characterized by, The scroll compressor includes the guide ring according to any one of claims 1 to 15.

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