CN108843578B - Compression mechanism and compressor with same - Google Patents

Compression mechanism and compressor with same Download PDF

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Publication number
CN108843578B
CN108843578B CN201810630860.1A CN201810630860A CN108843578B CN 108843578 B CN108843578 B CN 108843578B CN 201810630860 A CN201810630860 A CN 201810630860A CN 108843578 B CN108843578 B CN 108843578B
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China
Prior art keywords
bearing
main bearing
compression mechanism
screw
cylinder assembly
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Chinese (zh)
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CN108843578A (en
Inventor
蒋君之
黄勇
车书刚
李华明
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Anhui Meizhi Precision Manufacturing Co Ltd
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Anhui Meizhi Precision Manufacturing Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/10—Stators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

The invention discloses a compression mechanism and a compressor with the same, wherein the compression mechanism comprises: the heat insulation part is at least arranged on the outer surface of at least one of the main bearing and the auxiliary bearing and is connected with the main bearing, the cylinder assembly and the auxiliary bearing through a first screw and a second screw, when the heat insulation part is arranged on one of the main bearing and the auxiliary bearing, the first screw penetrates through one of the heat insulation part, the main bearing and the auxiliary bearing and then is in threaded connection with the cylinder assembly, the second screw penetrates through the other one of the main bearing and the auxiliary bearing and then is in threaded connection with one of the main bearing and the auxiliary bearing, and the heat insulation part is a plastic part. The compression mechanism is low in cost and convenient to manufacture, and can well reduce the heat transfer of high-temperature exhaust refrigerants outside the compression mechanism to low-temperature refrigerants inside the air cylinder, so that the energy efficiency ratio of the compressor can be well ensured, the reliable connection of the heat insulation piece is ensured, and the problem of stress relaxation is solved.

Description

Compression mechanism and compressor with same
Technical Field
The invention relates to the field of compressors, in particular to a compression mechanism and a compressor with the same.
Background
In the related art, a compression mechanism of a compressor is filled with a high-temperature exhaust refrigerant, and the high-temperature exhaust refrigerant heats a refrigerant in a low-temperature state in a cylinder of the compression mechanism, so that the temperature of the low-temperature refrigerant is increased, and the energy efficiency ratio of the compressor is reduced.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, the invention proposes a compression mechanism which, when applied to a compressor, can perfectly guarantee the energy efficiency ratio of the compressor.
The invention also provides a compressor with the compression mechanism.
According to a compression mechanism of an embodiment of a first aspect of the present invention, comprising: a cylinder assembly comprising at least one cylinder; the main bearing and the auxiliary bearing are respectively arranged at two axial ends of the cylinder assembly; a heat insulating member provided at least on an outer surface of at least one of the main bearing and the sub bearing, the main bearing, the cylinder assembly and the sub bearing being coupled by a first screw and a second screw, the first screw being threaded to the cylinder assembly after passing through one of the heat insulating member, the main bearing and the sub bearing when the heat insulating member is provided on the one of the main bearing and the sub bearing, the second screw being threaded to the one of the main bearing and the sub bearing after passing through the other of the main bearing and the sub bearing and the cylinder assembly, the heat insulating member being a plastic member.
According to the compression mechanism provided by the embodiment of the invention, the heat insulation piece is arranged on the outer surface of at least one of the main bearing and the auxiliary bearing, and is made of a plastic piece, so that the compression mechanism is low in cost and convenient to manufacture, and when the compression mechanism is applied to a compressor, the heat transfer of high-temperature exhaust refrigerant outside the compression mechanism to low-temperature refrigerant in a cylinder can be well reduced, so that the energy efficiency ratio of the compressor can be well ensured. Moreover, by adopting the thread fastening mode, the main bearing, the cylinder component and the auxiliary bearing can be firmly connected into a whole, the reliable connection of the heat insulation piece is ensured, and the problems of stress relaxation and the like are solved.
According to some embodiments of the invention, the torque required to tighten the first screw is T1The torque required to tighten the second screw is T2Wherein said T is1、T2Satisfies the following conditions: t is2-T1≥3N·m。
According to some embodiments of the invention, the number of the first screws is at least two, and at least two of the first screws are arranged at intervals in the circumferential direction of the cylinder assembly.
According to some embodiments of the invention, the number of the second screws is at least three, and at least three of the second screws are arranged at intervals in the circumferential direction of the cylinder assembly.
According to some embodiments of the invention, a side of the one of the main bearing and the secondary bearing, which is remote from the other of the main bearing and the secondary bearing, is provided with a muffler, and the first screw is screwed with the cylinder assembly through the muffler, the heat insulator, the one of the main bearing and the secondary bearing.
According to some embodiments of the invention, the heat shield is riveted, glued or snap-connected to the other of the main bearing and the secondary bearing when the heat shield is provided on the other of the main bearing and the secondary bearing.
According to some embodiments of the invention, the primary bearing and the secondary bearing each comprise a hub portion and a flange portion connected to an end of the hub portion adjacent the cylinder assembly, the thermal insulation being adapted to be provided on an outer surface of the flange portion.
According to some embodiments of the invention the thermal insulation is provided on the main bearing.
According to some embodiments of the invention, the cylinder assembly comprises one said cylinder.
A compressor according to an embodiment of the second aspect of the present invention includes the compression mechanism according to the above-described embodiment of the first aspect of the present invention.
According to some embodiments of the present invention, the refrigerant used in the compressor is R32 refrigerant.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic longitudinal cross-sectional view of a compression mechanism according to an embodiment of the invention;
FIG. 2 is a top view of a compression mechanism according to an embodiment of the present invention;
fig. 3 is a schematic longitudinal cross-sectional view of a compression mechanism of the prior art.
Reference numerals:
100: a compression mechanism;
1: a cylinder;
2: a main bearing; 21: a hub portion; 22: a flange portion;
3: a secondary bearing; 4: a thermal insulation member;
5: a first screw; 6: a second screw;
7: a muffler; 8: a crankshaft; 9: a piston;
1': a cylinder;
2': a main bearing; 3': a secondary bearing;
5': screwing; 6': a lower screw; 7': a muffler.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A compression mechanism 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 2.
As shown in fig. 1 to 2, a compression mechanism 100 according to an embodiment of the first aspect of the present invention includes a cylinder assembly, a main bearing 2, a sub-bearing 3, and a heat insulator 4.
The cylinder assembly comprises at least one cylinder 1. The main bearing 2 and the sub bearing 3 are provided at both axial ends (e.g., upper and lower ends in fig. 1) of the cylinder assembly, respectively. For example, in the example of fig. 1, when the cylinder assembly includes one cylinder 1, the main bearing 2 is provided at the top of the cylinder 1, and the sub-bearing 3 is provided at the bottom of the cylinder 1. When the above cylinder assembly having one cylinder 1 is applied to a compressor (not shown), the compressor is a single cylinder compressor.
When the cylinder assembly includes a plurality of cylinders 1, two adjacent cylinders 1 are separated by a partition (not shown), the main bearing 2 is disposed at the top of the plurality of cylinders 1, and the sub-bearing 3 is disposed at the bottom of the plurality of cylinders 1. When the above cylinder assembly having a plurality of cylinders 1 is applied to a compressor, the compressor is a multi-cylinder compressor.
Referring to fig. 1, the compression mechanism 100 further includes a crankshaft 8, the crankshaft 8 may axially penetrate through the main bearing 2, the cylinder assembly and the auxiliary bearing 3, the crankshaft 8 has an eccentric portion, the piston 9 is sleeved outside the eccentric portion, and the piston 9 is located in the cylinder 1. When the compression mechanism 100 is applied to a compressor, a motor (not shown) of the compressor rotates the crankshaft 8, and the crankshaft 8 drives the piston 9 to roll along the inner wall of the cylinder 1 to compress the refrigerant in the cylinder 1.
The thermal insulation 4 is provided at least on an outer surface of at least one of the main bearing 2 and the secondary bearing 3. Here, the following four cases are included: the first, heat insulation 4 is provided only on the outer surface of the main bearing 2; second, the heat insulating member 4 is provided only on the outer surface of the sub-bearing 3; thirdly, the heat insulation piece 4 is arranged on the outer surfaces of the main bearing 2 and the auxiliary bearing 3; fourth, the thermal insulation 4 is provided on the outer surface of at least one cylinder 1 of the main bearing 2, the secondary bearing 3 and the cylinder assembly. It should be noted that the direction "outside" may be understood as a direction away from the center of the compression mechanism 100, and the opposite direction is defined as "inside", i.e., a direction toward the center of the compression mechanism 100.
The heat insulating member 4 is a plastic member. Therefore, the heat insulation piece 4 made of the plastic material has low heat conductivity coefficient, and when the compression mechanism 100 according to the embodiment of the invention is applied to a compressor, a low-temperature refrigerant in the cylinder 1 can be well isolated from a high-temperature exhaust refrigerant outside the compression mechanism 100, so that the energy efficiency ratio of the compressor can be well ensured. Moreover, the heat insulating material 4 made of plastic is low in cost and easy to manufacture.
The screw fastening method used in the prior art is shown in fig. 3. Specifically, a threaded hole is formed in the cylinder 1 ', and an upper screw 5' penetrates through holes in the muffler 7 and the main bearing 2 'and then is screwed into the threaded hole in the cylinder 1', so that the main bearing 2 'and the cylinder 1' are locked; the lower screw 6 ' passes through the through hole on the auxiliary bearing 3 and then is screwed in the threaded hole on the cylinder 1, thereby locking the auxiliary bearing 3 ' and the cylinder 1 '.
For example, if the screw fastening method described above in the prior art is continued after the heat insulating material 4 made of plastic is added between the upper bearing and the muffler 7: namely, the upper screw 5 'passes through the through holes on the muffler 7', the heat insulating part 4 and the main bearing 2 'and then is screwed in the threaded hole on the cylinder 1', and the main bearing 2 'and the cylinder 1' are locked. Because the hardness of the plastic material is far lower than that of the cast iron material adopted by the main bearing 2 'and the carbon steel material adopted by the silencer 7', the bearable screw force is small, the locking of the main bearing 2 'and the cylinder 1' needs large screw force, the heat insulation piece 4 can be broken under the action of the screw force, or even if the heat insulation piece 4 is not broken, the heat insulation piece 4 made of the plastic material can be degraded under a high-temperature environment for a long time, so that stress is loosened, and the fastening force between the main bearing 2 'and the cylinder 1' is greatly reduced to cause looseness.
In order to solve the above problems, the present invention employs a fastening manner in which, for example, referring to fig. 1 in combination with fig. 2, the main bearing 2, the cylinder assembly and the sub-bearing 3 are coupled by a first screw 5 and a second screw 6, and when the heat insulator 4 is provided on one of the main bearing 2 and the sub-bearing 3, the first screw 5 is screwed with the cylinder assembly after passing through the heat insulator 4, the one of the main bearing 2 and the sub-bearing 3, and the second screw 6 is screwed with the one of the main bearing 2 and the sub-bearing 3 after passing through the other of the main bearing 2 and the sub-bearing 3 and the cylinder assembly. For example, in the example of fig. 1, when the heat insulator 4 is provided on the main bearing 2, the lower end of the first screw 5 may be screwed to the threaded hole of the cylinder 1 after passing through the through hole of the heat insulator 4 and the through hole of the main bearing 2 in this order from top to bottom, and the upper end of the second screw 6 may be screwed to the threaded hole of the main bearing 2 after passing through the through hole of the sub bearing 3 and the through hole of the cylinder 1 in this order from bottom to top. Thereby, the main bearing 2, the cylinder assembly and the sub-bearing 3 are tightly integrated into one body by the screw force of the second screw 6. Thus, the first screws 5 may be used for aligning and mounting the thermal insulation 4, and no longer have to take over the role of locking the main bearing 2 and the cylinder 1. That is, the first screw 5 functions in two ways: 1. the main bearing 2 and the cylinder 1 are aligned (the relative position of the main bearing 2 and the cylinder 1 is adjusted, so that when the crankshaft 8 drives the piston 9 to rotate in the cylinder 1, a reasonable gap exists between the piston 9 and the cylinder 1); 2. the thermal insulation 4 is installed.
Because the locking force that first screw 5 provided only needs to play the effect of fixed heat insulating part 4 and main bearing 2, and the effort that leads to producing the displacement between these two only has the impact force of exhaust and the inertia force that the vibration of compression mechanism 100 produced, is less than the radial effort that bent axle 8 transmitted for main bearing 2 far away, therefore the moment of torsion greatly reduced that first screw 5 needs during compressor installation to can not lead to the fracture of heat insulating part 4 of plastics material. At the moment, the stress of the heat insulating piece 4 made of the plastic material is greatly reduced, the problem of stress relaxation of the heat insulating piece 4 after the compressor works for a long time can be greatly improved, the stress reduction amplitude can be greatly reduced, and the silencer 7, the heat insulating piece 4 and the main bearing 2 are not easy to displace.
According to the compression mechanism 100 of the embodiment of the invention, the heat insulation piece 4 is arranged on the outer surface of at least one of the main bearing 2 and the auxiliary bearing 3, and the heat insulation piece 4 is made of a plastic piece, so that the cost is low, the manufacturing is convenient, and when the compression mechanism 100 is applied to a compressor, the heat transfer of high-temperature exhaust refrigerant outside the compression mechanism 100 to low-temperature refrigerant in the cylinder 1 can be well reduced, and the energy efficiency ratio of the compressor can be well ensured. Moreover, by adopting the thread fastening mode, the reliable connection of the heat insulation piece 4 is ensured and the problems of stress relaxation and the like are improved while the main bearing 2, the cylinder component and the auxiliary bearing 3 can be firmly connected into a whole.
Alternatively, the torque required to tighten the first screw 5 is T1The torque required to tighten the second screw 6 is T2Wherein T is1、T2Satisfies the following conditions: t is2-T1Not less than 3 N.m. Therefore, the heat insulation piece 4 and the main bearing 2 can be well fixed, the problem that the stress of the heat insulation piece 4 is relaxed and the like after the compressor works for a long time can be effectively solved, and the service life of the heat insulation piece 4 made of plastic is prolonged.
Optionally, the number of the first screws 5 is at least two, and the at least two first screws 5 are arranged at intervals in the circumferential direction of the cylinder assembly. For example, in the example of fig. 2, two first screws 5 are provided, and two first screws 5 are arranged at substantially equal intervals in the circumferential direction of the cylinder 1, and the included angle between the two first screws 5 is substantially 180 °, so that the number of first screws 5 is small, and the heat insulating member 4 and the main bearing 2 can be well fixed, and the assembling efficiency is improved and the cost is reduced.
Optionally, the number of the second screws 6 is at least three, and the at least three second screws 6 are arranged at intervals in the circumferential direction of the cylinder assembly. For example, in the example of fig. 2, the number of the second screws 6 is five, the five second screws 6 are arranged substantially at regular intervals in the circumferential direction of the cylinder 1, and the five second screws 6 and the two first screws 5 are spaced apart from each other. Therefore, the main bearing 2, the air cylinder assembly and the auxiliary bearing 3 can be well fixed, the stress of the main bearing 2, the air cylinder assembly and the auxiliary bearing 3 is uniform, and the connection is firm.
Two first screws 5 and five second screws 6 are shown in fig. 2 for illustrative purposes, but it is obvious to those skilled in the art after reading the technical solution of the present application that the solution can be applied to three or more first screws 5 and four or more second screws 6, which also falls within the protection scope of the present invention.
According to some embodiments of the present invention, as shown in fig. 1, a side of the one of the main bearing 2 and the sub bearing 3, which is away from the other one of the main bearing 2 and the sub bearing 3, is provided with a muffler 7, and the first screw 5 is screwed with the cylinder assembly through the muffler 7, the heat insulator 4, the one of the main bearing 2 and the sub bearing 3. The first screw 5 now serves to fix the muffler 7, the heat shield 4 and the main bearing 2.
According to a further embodiment of the invention, the heat insulating element 4 is riveted, glued or snap-connected to the aforementioned other one of the main bearing 2 and the secondary bearing 3 (not shown), when the heat insulating element 4 is provided on the aforementioned other one of the main bearing 2 and the secondary bearing 3. The heat insulating member 4 disposed on the other one of the main bearing 2 and the sub bearing 3 is not connected to the other one of the main bearing 2 and the sub bearing 3 by the second screw 6, that is, the heat insulating member 4 is not subjected to the force of the second screw 6 generated by locking the main bearing 2, the cylinder assembly and the sub bearing 3, so that the heat insulating member 4 is not easily broken and the problem of stress relaxation of the heat insulating member 4 caused by the long-term operation of the compressor is not easily caused.
According to some embodiments of the present invention, as shown in fig. 1, the main bearing 2 and the sub-bearing 3 respectively include a hub portion 21 and a flange portion 22 coupled to an end of the hub portion 21 adjacent to the cylinder assembly, and the heat insulator 4 is adapted to be provided on an outer surface of the flange portion 22. For example, referring to fig. 1, when the heat insulator 4 is provided on the main bearing 2, the heat insulator 4 includes a first heat insulating portion covering the upper surface of the flange portion 22 and a second heat insulating portion covering the outer peripheral surface of the flange portion 22, and the outer end of the first heat insulating portion is connected to the upper end of the second heat insulating portion. Thus, the high-temperature exhaust refrigerant in the compressor can be separated from the low-temperature refrigerant in the cylinder 1, and heat transfer between the high-temperature exhaust refrigerant and the low-temperature refrigerant can be effectively prevented. Of course, the heat insulating member 4 may cover the entire outer surface of at least the main bearing 2 or the sub-bearing 3 after the compression mechanism 100 is assembled, so as to achieve a further improved heat insulating effect.
According to the compression mechanism 100 of the embodiment of the invention, the heat insulation piece 4 is made of the plastic material with the heat conductivity coefficient smaller than that of the metal material, so that the heat transfer from the high-temperature exhaust refrigerant to the low-temperature refrigerant in the cylinder 1 is reduced, and the energy efficiency ratio of the compressor is improved. Meanwhile, for example, as shown in fig. 1, the second screw 6 is locked on the main bearing 2 to fix the main bearing 2, the cylinder 1 and the auxiliary bearing 3, the first screw 5 only needs to play a role of fixing the muffler 7, the heat insulating member 4 and the main bearing 2, so that the torque of the first screw 5 can be set to be lower than that of the second screw 6, thereby preventing the heat insulating member 4 made of plastic from loosening due to stress relaxation after working for a long time under the action of a large screw force, or even if loosening occurs, the main bearing 2 and the cylinder 1 do not need to be fastened by the first screw 5, and the main bearing 2 and the cylinder 1 do not generate displacement.
A compressor according to an embodiment of the second aspect of the present invention includes the compression mechanism 100 according to the above-described embodiment of the first aspect of the present invention.
According to the compressor of the embodiment of the invention, the energy efficiency ratio of the compressor can be improved by adopting the compression mechanism 100.
Alternatively, the refrigerant used in the compressor is R32 refrigerant. Therefore, for the compressor adopting the R32 refrigerant, the R32 refrigerant has the characteristic of high exhaust temperature, so the effect achieved by adopting the compression mechanism 100 is particularly remarkable, the heat insulation piece 4 made of plastic is still not easy to have the problem of stress relaxation even under the high-temperature environment for a long time, the heat insulation effect is good, and the service life is long.
Other constructions and operations of the compressor according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A compression mechanism, comprising:
a cylinder assembly comprising at least one cylinder;
the main bearing and the auxiliary bearing are respectively arranged at two axial ends of the cylinder assembly, and a silencer is arranged on one side of one of the main bearing and the auxiliary bearing, which is far away from the other one of the main bearing and the auxiliary bearing;
a heat insulating member provided at least on an outer surface of at least one of the main bearing and the sub-bearing, the main bearing, the cylinder assembly and the sub-bearing being coupled by a first screw and a second screw, the first screw being threaded to the cylinder assembly after passing through the one of the muffler, the heat insulating member, the main bearing and the sub-bearing, the second screw being threaded to the one of the main bearing and the sub-bearing after passing through the other of the main bearing and the sub-bearing, the cylinder assembly, and the heat insulating member being a plastic member.
2. The compression mechanism of claim 1, wherein tightening the first screwThe required torque is T1The torque required to tighten the second screw is T2Wherein said T is1、T2Satisfies the following conditions: t is2-T1≥3N·m。
3. The compression mechanism of claim 1, wherein the number of the first screws is at least two, and at least two of the first screws are spaced apart in a circumferential direction of the cylinder assembly.
4. The compression mechanism of claim 1, wherein the number of the second screws is at least three, and at least three of the second screws are spaced apart in a circumferential direction of the cylinder assembly.
5. The compression mechanism of claim 1, wherein the thermal shield is riveted, bonded, or snap-fit to the other of the primary bearing and the secondary bearing when the thermal shield is disposed on the other of the primary bearing and the secondary bearing.
6. A compression mechanism according to any one of claims 1 to 5, wherein the primary and secondary bearings each comprise a hub portion and a flange portion connected to an end of the hub portion adjacent the cylinder assembly, the thermal insulation being adapted to be provided on an outer surface of the flange portion.
7. The compression mechanism of claim 1, wherein the thermal insulator is disposed on the main bearing.
8. The compression mechanism of claim 1, wherein said cylinder assembly includes one said cylinder.
9. A compressor characterized by comprising the compression mechanism according to any one of claims 1 to 8.
10. The compressor of claim 9, wherein the refrigerant used in the compressor is R32 refrigerant.
CN201810630860.1A 2018-06-19 2018-06-19 Compression mechanism and compressor with same Active CN108843578B (en)

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CN110307162A (en) * 2019-06-21 2019-10-08 珠海格力节能环保制冷技术研究中心有限公司 A kind of compressor and the air conditioner with it
CN110701052A (en) * 2019-10-24 2020-01-17 珠海格力节能环保制冷技术研究中心有限公司 Pump body subassembly and compressor

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JP6548915B2 (en) * 2015-03-05 2019-07-24 三菱重工サーマルシステムズ株式会社 Compressor
KR20170091890A (en) * 2016-02-02 2017-08-10 엘지전자 주식회사 Rotary compressor
CN106351843A (en) * 2016-10-17 2017-01-25 西安交通大学 Downward exhaust heat-resistant rotary compressor
CN106438372A (en) * 2016-10-17 2017-02-22 西安交通大学 Rotary compressor with top exhaust gas thermally insulated

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