Sealing assembly and scroll compressor

Abstract

The utility model discloses a sealing assembly and a scroll compressor, which belong to the technical field of scroll compressors, and comprise a first sealing element, a second sealing element, a third sealing ring and a partition plate, one end of the first sealing element is arranged in one end of the second sealing element, the third sealing ring is embedded on the outer edge of the second sealing element, and the partition plate is arranged on the outer edge of the first sealing element. The partition plate is located below the third sealing ring. Due to the fact that the partition plate is installed at the bottom end of the second sealing piece, upward supporting force can be provided for the third sealing ring when the working condition is abnormal; the multiple drainage grooves are evenly formed in the outer edge of the partition plate, a drainage path can be provided between the third sealing ring and the partition plate, and the situation that the internal and external pressure difference of the sealing rings is too large when the working condition is abnormal is prevented. In addition, an elastic piece can be further arranged on the partition plate to assist the sealing assembly in abutting against the silencing cover so as to improve the sealing performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to scroll compressor technical field, and particularly relates to sealing assembly and scroll compressor. BACKGROUND

[0002] Scroll compressor is an important component part in air conditioning system, can utilize dynamic scroll disc and static scroll disc to compress the low temperature low pressure refrigerant sucked and form high temperature high pressure refrigerant, thereby propelling the internal circulation of refrigerant in air system, to further realize refrigeration or heating function etc. Figure 1 As shown in the compression process, scroll compressor 1 inside will form high pressure area H, low pressure area L and medium pressure area M, and uses silencing cover 12 and sealing assembly 11 to separate each area to prevent cavity.

[0003] However, in actual use, if scroll compressor is abnormal due to failure, the pressure of medium pressure area M will be abnormally reduced, the pressure of medium pressure area M is less than the pressure of low pressure area L, which will make sealing assembly 11 bear extrusion far more than normal working condition. Among them, the sealing ring 111 in the sealing assembly 111 is easy to be deformed by downward and inward load, and even be crushed, so as to fail to maintain the original sealing performance, which will have negative impact on the operation of scroll compressor. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the problem that the sealing ring in the sealing assembly in the prior art is easy to be extruded and deformed or crushed when the pressure of medium pressure area is abnormal, and provides sealing assembly and scroll compressor.

[0005] In order to achieve the above purpose, the utility model technical scheme is: sealing assembly is provided, including first sealing piece, second sealing piece, third sealing ring, one end of the first sealing piece is installed in one end of the second sealing piece, the third sealing ring is embedded in the outer edge of the second sealing piece, the third sealing ring includes leg part, the leg part is a part of the outer edge of the sealing ring downwardly bent, further including baffle, the baffle is located below the leg part of the third sealing ring.

[0006] In an embodiment, a plurality of flow grooves are formed in the outer edge of the baffle.

[0007] In an embodiment, the baffle further includes elastic sheet, the elastic sheet is arranged at one end of the flow groove close to the center of the baffle, and the elastic sheet is arranged at an angle with the baffle.

[0008] In an embodiment, the angle is an acute angle.

[0009] In an embodiment, the sealing assembly further includes first sealing ring, the first sealing ring is installed in the first sealing piece, and the outer side wall of the first sealing ring abuts against the inner side wall of the first sealing piece.

[0010] In an embodiment, the sealing assembly further comprises a second sealing ring, the second sealing ring is installed between the first sealing member and the second sealing member, the first sealing member and the second sealing member abut and form a first installation groove, one end of the second sealing ring is embedded in the first installation groove.

[0011] The utility model also provides a scroll compressor, including shell, sound elimination subassembly, compression subassembly, bearing seat and drive component, sound elimination subassembly compression subassembly bearing seat drive component are installed in the inside of shell in proper order axially, compression subassembly includes static scroll disc and dynamic scroll disc, static scroll disc and dynamic scroll disc are mutually engaged, still include the sealing assembly as above, sealing assembly axially connects compression subassembly and sound elimination subassembly.

[0012] In an embodiment, the partition plate is installed between the second sealing member and the static scroll disc, and the partition plate directly contacts the static scroll disc.

[0013] In an embodiment, the static scroll disc includes a first protrusion and a second protrusion, the second protrusion is axially extended from an outer edge of the static scroll disc, the first protrusion is a part of an upper surface of the static scroll disc axially extended, the first protrusion is arranged inside the second protrusion, the first protrusion abuts against the second sealing ring, and the second protrusion abuts against the third sealing ring.

[0014] In summary, the partition plate is installed at the bottom end of the second sealing member, which can provide upward support force for the third sealing ring when the working condition is abnormal; the outer edge of the partition plate is uniformly provided with a plurality of drain grooves, which can provide a drain path between the third sealing ring and the partition plate to prevent the pressure difference inside and outside the sealing ring from being too large when the working condition is abnormal. In addition, the partition plate can also be provided with a spring piece to assist the sealing assembly to abut against the sound elimination cover, so as to improve the sealing performance.

[0015] To make the above features and advantages of the utility model more obvious and easy to understand, the following examples are given, and the details are described as follows in combination with the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the scroll compressor in the prior art.

[0017] Figure 2 It is a schematic view of the sealing assembly in the first embodiment of the utility model.

[0018] Figure 3 It is a sectional view of Figure 2 .

[0019] Figure 4It is the assembly diagram of the sealing assembly in the embodiment one of the utility model.

[0020] Figure 5 It is the schematic view of the partition plate in the embodiment one of the utility model.

[0021] Figure 6 It is the sectional view of the scroll compressor in the embodiment one of the utility model.

[0022] Figure 7 It is Figure 6 The local enlarged view of A in the embodiment one.

[0023] Figure 8 It is Figure 7 The schematic view of each component under the abnormal state in the embodiment one.

[0024] Figure 9 It is the schematic view of the partition plate in the embodiment two of the utility model.

[0025] Figure 10 It is the sectional view of the sealing assembly in the embodiment two of the utility model.

[0026] Figure 11 It is the sectional view of the scroll compressor in the embodiment two of the utility model.

[0027] Reference signs:

[0028] Scroll compressor-1;

[0029] Sealing assembly-11;

[0030] Sealing ring-111;

[0031] Silencer cover-12;

[0032] Shell-13;

[0033] Compression assembly-14;

[0034] Static scroll-141;

[0035] Top cover-15;

[0036] Scroll compressor-2;

[0037] Sealing assembly-21;

[0038] First sealing member-211;

[0039] Body-2111;First recess-2112;Second recess-2113;First through hole-2114;First flange-2115;

[0040] Second sealing member-212;

[0041] Body-2121;Third groove-2122;Second through hole-2123;Step structure-2124;Second flange-2125;Third flange-2126;Second mounting groove-2127;

[0042] First sealing ring-213;

[0043] Second sealing ring-214;

[0044] Third sealing ring-215;Leg-2151;

[0045] Partition-216;Drainage groove-2161;Spring-2162;

[0046] First mounting groove-217;

[0047] Housing-22;

[0048] Silencing assembly-23;

[0049] Silencing cover-231;

[0050] Compression assembly-24;

[0051] Static scroll-241;Dynamic scroll-242;

[0052] First protrusion-2411;Second protrusion-2412

[0053] Bearing seat-25;

[0054] Drive assembly-26. DETAILED DESCRIPTION

[0055] In order to make the purpose and technical scheme of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely below in combination with the drawings of the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the described embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0056] It should be understood that although the terms "first", "second" and the like can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of the utility model, the first element can be called the second element, and similarly, the second element can be called the first element.

[0057] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Although the illustrations only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components, the form, quantity and proportion of each component can be arbitrarily changed in actual implementation, and the layout of the components may also be more complex.

[0058] Figure 1 A schematic diagram of a scroll compressor in the prior art, such as... Figure 1 As shown, in the prior art, when the scroll compressor 1 is operating, the uncompressed, low-temperature, low-pressure refrigerant enters the housing 13, forming a low-pressure zone L in the working chamber outside the compression assembly 14. When the refrigerant enters the compression assembly 14 for compression, the refrigerant pressure begins to rise, but has not yet reached the final discharge pressure; this area forms a medium-pressure zone M. The compressed, high-temperature, high-pressure refrigerant is discharged between the muffler cover 12 and the top cover 15, forming a high-pressure zone H. The high-pressure zone H and the low-pressure zone L are separated by the muffler cover 12, and the medium-pressure zone M is separated from the other two zones by a sealing assembly 11. Figure 1 It is known that the sealing ring 111 has an L-shaped cross section. Under normal conditions, the outer side of the sealing ring 111 contacts the inner wall of the stationary vortex 141 to achieve sealing. Under abnormal conditions, if the pressure in the medium-pressure zone M is less than that in the low-pressure zone L, the sealing ring 111 is easily deformed by downward and inward forces, which in turn causes a gap to be generated at the contact point between the sealing ring 111 and the inner wall of the stationary vortex 141, which has a negative impact on the sealing performance.

[0059] Example 1

[0060] To improve the pressure resistance of scroll compressors under abnormal conditions, such as Figure 2 As shown, Embodiment 1 of this utility model provides a sealing assembly. Figure 3 for Figure 2 The sectional view, combined with Figure 2 and Figure 3It can be known that the sealing assembly 21 comprises a first sealing piece 211, a second sealing piece 212, a first sealing ring 213, a second sealing ring 214, a third sealing ring 215 and a partition plate 216. One end of the first sealing piece 211 is axially installed in one end of the second sealing piece 212. The first sealing piece 211 and the second sealing piece 212 axially abut and form a first installation groove 217 at the abutting position. The first sealing ring 213 is coaxially installed in the first sealing piece 211. The second sealing ring 214 is axially installed between the first sealing piece 211 and the second sealing piece 212. One end of the second sealing ring 214 is embedded in the first installation groove 217. The third sealing ring 215 is arranged at the outer edge of the second sealing piece 212. One end of the third sealing ring 215 is embedded in the second sealing piece 212. The partition plate 216 is located below the free end of the third sealing ring 215 and is axially installed at one end of the second sealing piece 212 away from the first sealing piece 211. The partition plate 216 is in clearance fit with the second sealing piece 212.

[0061] The first sealing piece 211 comprises a body 2111, a first recess 2112, a second recess 2113, a first through hole 2114 and a first flange 2115. The first recess 2112 and the second recess 2113 are respectively arranged at two ends of the body 2111. The first recess 2112 and the second recess 2113 are communicated by the first through hole 2114. The first flange 2115 is radially protruded from the outer wall of one end of the body 2111 close to the second recess 2113. The body 2111 is in cylindrical shape. The diameter of the first recess 2112 is smaller than the diameter of the second recess 2113. The diameter of the first through hole 2114 is smaller than the diameter of the first recess 2112. The first recess 2112 is used for installing the first sealing ring 213. The second recess 2113 is used for accommodating the other end of the second sealing ring 214.

[0062] The second sealing member 212 comprises a body 2121, a third groove 2122, a second through hole 2123, a step structure 2124, a second flange 2125, a third flange 2126 and a second mounting groove 2127, the third groove 2122 is arranged at the center of one end of the body 2121, the second through hole 2123 is arranged at the center of the other end of the body 2121, the third groove 2122 and the second through hole 2123 are communicated, the step structure 2124 is arranged at the angle between the inner side wall and the inner bottom wall of the third groove 2122, the second flange 2125 and the third flange 2126 are respectively formed by the upper and lower outer edges of the body 2121 protruding radially, and the second mounting groove 2127 is formed between the second flange 2125 and the third flange 2126. The second sealing member 212 and the first sealing member 211 are fixedly connected, and the riveting mode can be selected for fixation. The body 2121 is disc-shaped. The diameter of the third groove 2122 is smaller than the diameter of the second through hole 2123, and the length of the second flange 2125 is greater than the length of the third flange 2126. One end of the third groove 2122 is used for mounting the first flange 2115, wherein the first flange 2115 axially abuts against the step structure 2124, and the first flange 2115 radially contacts the inner side wall of the third groove 2122. Since the size of the first flange 2115 is greater than the size of the step structure 2124, the abutting portion of the first flange 2115 and the step structure 2124 forms the first mounting groove 217, the first mounting groove 217 is formed by the bottom surface of the first flange 2115, the side surface of the step structure 2124 and the inner bottom wall of the third groove 2122, and the second sealing ring 214 is embedded in the first mounting groove 217. Similarly, the second mounting groove 2127 provides a mounting reference for the third sealing ring 215.

[0063] In combination Figure 3 and Figure 4 It can be known that the first sealing ring 213 is installed in the first groove 2112, the upper end surface of the first sealing ring 213 is flushly installed with the upper end surface of the first sealing member 211, the outer side wall of the first sealing ring 213 abuts against the inner side wall of the first sealing member 211, the first sealing ring 213 always maintains the contact state with the first sealing member 211, and the sealing performance of the connection between the first sealing member 211 and other components is ensured.

[0064] The static vortex disc 241 comprises a first protrusion 2411 and a second protrusion 2412, the second protrusion 2412 is axially extended from the outer edge of the static vortex disc 241, the first protrusion 2411 is a part of the upper end surface of the static vortex disc 241 axially extended, and the first protrusion 2411 is arranged inside the second protrusion 2412. One end of the second sealing ring 214 is mounted in the first mounting groove 217, and the side wall of the other end is used for abutting the outer side wall of the first protrusion 2411 of the static vortex disc 241, and the first protrusion 2411 of the static vortex disc 241 is mounted in the second recess 2113 through the second through hole 2123 and the third groove 2122. The second sealing ring 214 is always in contact with the first protrusion 2411 of the static vortex disc 241, so as to improve the sealing performance between the sealing assembly 21 and the static vortex disc 241.

[0065] The third sealing ring 215 comprises a leg portion 2151, which is a part of the outer edge of the sealing ring 215 bent downward. One end of the third sealing ring 215 is mounted in the second mounting groove 2127, and the outer side wall of the leg portion 2151 is used for abutting the inner side wall of the second protrusion 2412 of the static vortex disc 241. In the normal state, the third sealing ring 215 is always in contact with the second sealing member 212 and the second protrusion 2412 without being separated, so as to further improve the sealing performance between the sealing assembly 21 and the static vortex disc 241.

[0066] The partition plate 216 is mounted between the second sealing member 212 and the static vortex disc 241, and there can be a gap between the partition plate 216 and the second sealing member 212 and the third sealing ring 215. The partition plate 216 is mounted on the upper end surface of the static vortex disc 241, for example but not limited to nested mounting, riveting or using glue to bond. The partition plate 216 can be a circular ring, or other reasonable shapes can be selected according to actual conditions. The outer diameter size of the partition plate 216 is greater than the inner diameter size of the third sealing ring 215, the outer diameter size of the partition plate 216 is less than the diameter size of the inner side wall of the second protrusion 2412 of the static vortex disc 241, and the inner diameter size of the partition plate 216 is greater than the diameter size of the outer side wall of the first protrusion 2411 of the static vortex disc 241.

[0067] In combination with Figure 4 and Figure 5 As shown in the drawings, a plurality of drainage grooves 2161 are uniformly arranged on the outer edge of the partition plate 216. The drainage grooves 2161 can provide a specific flow path for the refrigerant under abnormal working conditions, so as to reduce the pressure difference on both sides of the sealing assembly 21, realize the balance of pressure, and then reduce the force borne by the third sealing ring 215 and reduce the risk of damage to the third sealing ring 215.

[0068] Figure 6 This is a schematic diagram of a scroll compressor with an anti-deformation sealing component according to the present invention, as shown below. Figure 6 As shown, the scroll compressor 2 further includes a housing 22, a silencing assembly 23, a compression assembly 24, a bearing housing 25, and a drive assembly 26. The silencing assembly 23, the sealing assembly 21, the compression assembly 24, the bearing housing 25, and the drive assembly 26 are sequentially and axially mounted inside the housing 22. The silencing assembly 23 is fixedly connected to the housing 22. The sealing assembly 21 is axially connected to the compression assembly 24 and the silencing assembly 23. The bearing housing 25 is mounted at the bottom end of the compression assembly 24. One end of the drive assembly 26 passes through the bearing housing 25 and is connected to the compression assembly 24. The compression assembly 24 includes a stationary scroll plate 241 and a moving scroll plate 242, which mesh with each other. The silencing assembly 23 includes a silencing cover 231, which is fixedly mounted on the housing 22. The second seal 212 is disposed at one end near the static vortex disk 241, while the first seal 211 is installed at one end near the muffler cover 231.

[0069] Combination Figure 6 and Figure 7 It is known that, under normal operating conditions, there are gaps between the second flange 2125 and the inner wall of the second protrusion 2412 of the stationary scroll plate 241, and between the third flange 2126 and the third sealing ring 215. Furthermore, because the pressure in the area formed by the sealing assembly 21 and the compression assembly 24 is higher than the pressure in the area formed by the outer shell 22 and the sealing assembly 21, under the influence of the pressure difference, the upper end face of one end of the third sealing ring 215 abuts against the top wall of the second mounting groove 2127, and the outer wall of one end of the leg 2151 of the third sealing ring 215 abuts against the inner wall of the second protrusion 2412 of the stationary scroll plate 241, thus ensuring that the connection maintains a sealed state.

[0070] Combination Figure 6 and Figure 8It can be known that if an abnormal condition occurs, that is, the pressure of the region formed by the sealing assembly 21 and the compression assembly 24 is lower than the pressure of the region formed by the shell 22 and the sealing assembly 21, the third sealing ring 215 bears a load opposite to that in a normal working condition, at this time, the bottom end of one end of the third sealing ring 215 abuts against the bottom wall of the second mounting groove 2127, and the bottom end of the leg portion 2151 of the third sealing ring 215 can abut against the partition plate 216. The partition plate 216 provides an upward force for the third sealing ring 215, can offset a part of the downward force, prevents single force bearing, and thus slows down the deformation of the third sealing ring. Even if the third sealing ring 215 is deformed when bearing a larger force, a channel will be generated between the outer side wall of the third sealing ring 215 and the inner side wall of the static scroll 241, and a plurality of flow relief grooves 2161 are formed on the partition plate 216, which are communicated to form a path for the refrigerant to pass through, so as to communicate the regions on both sides of the sealing assembly 21, and achieve the effect of timely flow relief. Timely flow relief can not only prevent the third sealing ring 215 from being crushed, but also further avoid negative effects such as scroll wear and motor overload.

[0071] Embodiment two

[0072] In another embodiment, as shown in Figure 9 The partition plate 216 can further include an elastic sheet 2162, which is arranged at one end of the flow relief groove 2161 close to the center of the partition plate 216, and the elastic sheet 2162 is arranged at an angle with the partition plate 216. Preferably, the angle is an acute angle. Figure 10 and Figure 11 It can be known that the elastic sheet 2162 abuts against the bottom of the second sealing element 212, the elastic sheet 2162 directly contacts the second sealing element 212 to provide an upward force, and assists the sealing assembly 21 to abut against the sound insulation cover 231, and effectively improves the sealing performance.

[0073] In summary, the sealing assembly and the scroll compressor provided by the utility model can provide an upward supporting force for the third sealing ring 215 when the working condition is abnormal, so as to prevent deformation; a plurality of flow relief grooves 2161 are uniformly formed on the outer edge of the partition plate 216, a flow relief path is provided between the third sealing ring 215 and the partition plate, and the pressure difference between the inside and outside of the sealing ring is prevented from being too large when the working condition is abnormal. In addition, the elastic sheet 2162 can be further arranged on the partition plate 216 to assist the sealing assembly 21 to abut against the sound insulation cover 231, so as to improve the sealing performance.

[0074] Although the utility model has disclosed as above with examples, it is not used to limit the utility model, anyone with ordinary knowledge in the art can make some changes and decorations without departing from the spirit and scope of the utility model, so the protection scope of the utility model is defined by the appended patent application scope.

Claims

1. A seal assembly comprising a first seal, a second seal, a third seal, one end of the first seal being mounted within one end of the second seal, the third seal being embedded in an outer edge of the second seal, the third seal comprising a leg portion, the leg portion being a portion of the outer edge of the seal that is bent downwardly, characterised in that, A partition plate is further included, which is located below the third seal ring leg.

2. The seal assembly of claim 1, wherein, A plurality of flow release grooves are formed in the outer edge of the partition plate.

3. The seal assembly of claim 2, wherein, The partition plate further includes a spring plate, which is arranged at one end of the flow release groove close to the center of the partition plate, and is arranged at an angle with the partition plate.

4. The seal assembly of claim 3, wherein, The angle is an acute angle.

5. The seal assembly of claim 1, wherein, The sealing assembly further includes a first seal ring, which is installed in the first seal member, and an outer side wall of the first seal ring is in abutment with an inner side wall of the first seal member.

6. The seal assembly of claim 5, wherein, The sealing assembly further includes a second seal ring, which is installed between the first seal member and the second seal member, and the first seal member and the second seal member are in abutment and form a first installation groove, and one end of the second seal ring is embedded in the first installation groove.

7. Scroll compressor comprising a casing, a sound attenuation assembly, a compression assembly, a bearing seat and a drive assembly, said sound attenuation assembly, said compression assembly, said bearing seat and said drive assembly being mounted axially one after the other inside said casing, said compression assembly comprising a static scroll and a dynamic scroll, said static scroll and said dynamic scroll being intermeshed, characterized in that, The sealing assembly is axially connected to the compression assembly and the sound elimination assembly.

8. The scroll compressor of claim 7, wherein, The partition plate is installed between the second seal member and the static scroll plate, and is in direct contact with the static scroll plate.

9. The scroll compressor of claim 7, wherein, The static scroll plate includes a first protruding part and a second protruding part, the second protruding part is axially extended from the outer edge of the static scroll plate, the first protruding part is a part of the upper end surface of the static scroll plate axially extended, the first protruding part is arranged inside the second protruding part, the first protruding part is in abutment with the second seal ring, and the second protruding part is in abutment with the third seal ring.

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