CN107869463B

CN107869463B - Compressor

Info

Publication number: CN107869463B
Application number: CN201610858887.7A
Authority: CN
Inventors: 黎法运; 虞阳波
Original assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Current assignee: Guangdong Meizhi Precision Manufacturing Co Ltd
Priority date: 2016-09-26
Filing date: 2016-09-26
Publication date: 2021-02-05
Anticipated expiration: 2036-09-26
Also published as: CN107869463A

Abstract

The invention discloses a compressor, comprising: the engine comprises a shell, an air cylinder assembly, a main bearing, an auxiliary bearing, a rack, a crankshaft, a dynamic sealing element and a transmission mechanism, wherein an oil pool is arranged in the shell; the cylinder assembly is arranged in the shell and comprises at least one cylinder; the frame is arranged on one side of the main bearing, which is far away from the cylinder assembly, and the frame, the shell and the main bearing are hermetically connected and define an accommodating space; one end of the crankshaft penetrates through the main bearing and extends into the cylinder, and the other end of the crankshaft extends out of the accommodating space; the dynamic sealing element is arranged between the main bearing and the crankshaft to seal a gap between the main bearing and the crankshaft; the transmission mechanism is arranged at the other end of the crankshaft to drive the crankshaft to rotate. According to the compressor provided by the invention, the sealing performance of the compressor is improved, and the sealing problem which is difficult to solve by the traditional semi-closed compressor is solved, so that the volume and the weight of the compressor are reduced, the energy efficiency and the reliability of the compressor are improved, the structure is simple, and the assembly is easy.

Description

Compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a compressor.

Background

In the related art, the pressure of a compressor, such as a compressor used for an air conditioner, is high, a semi-closed compressor separating a compression mechanism from a transmission mechanism is difficult to realize, mainly, exhausted high-pressure refrigerant refrigeration oil is easy to leak out to a low-pressure external environment, refrigerant leakage of an air conditioning system is caused, the refrigeration effect is influenced, the reliability of the compressor is easy to reduce due to the leakage of the refrigeration oil, and therefore the structure of the air conditioning compressor is basically a fully closed structure.

However, the totally enclosed compressor needs electricity to drive, and in some occasions, for example, the automotive air conditioning compressor needs to convert the kinetic energy of the engine into electric energy, and then the electric energy drives the motor of the compressor to run, and the utilization rate of the energy is not high due to the continuous conversion of the energy. In addition, the compressor for the air conditioner generally adopts the rotor compressor, and the sealed problem of rotor formula compression is difficult to solve, if solve semi-closed compressor sealed problem, the mature production technology of rotor compressor will bring new growth point for semi-closed compressor use market.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a compressor having high energy efficiency, high reliability and good sealing performance.

The compressor according to the present invention comprises: a housing having an oil sump therein; a cylinder assembly disposed within the housing, the cylinder assembly including at least one cylinder; the main bearing is arranged at one end of the cylinder assembly in the axial direction; the auxiliary bearing is arranged at the other end of the cylinder assembly in the axial direction; the frame is arranged on one side, far away from the cylinder assembly, of the main bearing, and the frame, the shell and the main bearing are hermetically connected and define an accommodating space; one end of the crankshaft penetrates through the main bearing and extends into the cylinder, and the other end of the crankshaft extends out of the accommodating space; a dynamic seal provided between the main bearing and the crankshaft to seal a gap between the main bearing and the crankshaft; and the transmission mechanism is arranged at the other end of the crankshaft to drive the crankshaft to rotate.

According to the compressor, the frame is arranged in the shell, the frame is respectively in sealing connection with the shell and the main bearing, and the dynamic sealing element is arranged between the crankshaft and the main bearing, so that the sealing performance of the compressor is improved, the sealing problem which is difficult to solve in the traditional semi-closed compressor is solved, the size and the weight of the compressor are reduced, the energy efficiency and the reliability of the compressor are improved, the structure is simple, and the assembly is easy.

In addition, the compressor according to the invention may also have the following additional technical features:

according to some embodiments of the invention, the main bearing is formed with a bore adapted to pass through the crankshaft, and an inner wall of the bore is formed with a receiving groove for receiving the dynamic seal.

Specifically, the accommodating groove is formed by the end face of one side of the main bearing far away from the cylinder assembly in a concave mode towards the direction of the cylinder assembly.

Further, a side surface of the dynamic seal member adjacent to the cylinder and a corresponding wall surface of the receiving groove are spaced apart from each other to define a cavity.

Specifically, an air suction hole is formed in the air cylinder, a pressure relief hole is formed in the main bearing, one end of the pressure relief hole is communicated with the cavity, and the other end of the pressure relief hole is communicated with the air suction hole.

According to some embodiments of the present invention, the crankshaft is formed with a first oil supply hole extending in an axial direction of the crankshaft and a second oil supply hole having one end communicating with the first oil supply hole and the other end communicating with the cavity.

Furthermore, at least one of the main bearing and the auxiliary bearing is provided with an oil supply channel, and one end of the oil supply channel is communicated with the oil pool.

In particular, the housing has a vent hole located on a side of the housing remote from the oil sump.

According to some embodiments of the present invention, a filter structure is provided on the exhaust passage communicating with the exhaust hole, and the filter structure is used for oil-gas separation of the refrigerant flowing through the exhaust passage.

Optionally, the compressor is a vertical compressor or a horizontal compressor.

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 perspective view of a compressor according to an embodiment of the present invention;

fig. 2 is a sectional view of a compressor according to an embodiment of the present invention;

FIG. 3 is an enlarged view of portion A circled in FIG. 2;

fig. 4 is another sectional view of the compressor according to the embodiment of the present invention;

fig. 5 is an enlarged view of a portion B circled in fig. 4.

Reference numerals:

the compressor (100) is provided with a compressor,

a shell 1, an oil pool 11, a welding groove 12, an exhaust hole 13, a main shell 14, an end shell 15,

the main bearing 2, the receiving groove 21, the cavity 211, the packing 22, the baffle 23, the relief hole 24, the oil supply passage 25,

the auxiliary bearing (3) is provided with a bearing,

the crankshaft 4, the eccentric portion 41, the first oil supply hole 42, the second oil supply hole 43,

the cylinder 5, the piston 51, the suction member 52,

a frame 6, a frame body 61, a frame flange 62, a frame hole 63 and a screw 64,

the device comprises a dynamic sealing element 7, a transmission mechanism 8, a filtering structure 9, a mounting structure 10 and a shaft pin 101.

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," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for convenience in describing and simplifying the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, 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 compressor 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 5. Among them, the compressor 100 may be a semi-hermetic compressor. Alternatively, compressor 100 may be a vertical compressor (as shown in FIG. 1). Of course, it will be understood by those skilled in the art that compressor 100 may also be a horizontal compressor (as shown in fig. 2 and 4).

As shown in fig. 1, 2 and 4, a compressor 100 according to an embodiment of the present invention includes: the engine comprises a shell 1, a cylinder component, a main bearing 2, a secondary bearing 3, a crankshaft 4, a frame 6, a dynamic seal 7 and a transmission mechanism 8.

Specifically, the housing 1 includes a main housing 14 and an end housing 15, both ends of the main housing 14 in the axial direction are open, and the end housing 15 is provided at one end (e.g., the right end in fig. 2 and 4) of the main housing 14 in the axial direction. The housing 1 has an oil sump 11 therein, and as shown in fig. 2 and 4, the right end of the housing 1 has the oil sump 11. When the compressor 100 is in operation, the lubricating oil, such as the refrigeration oil, in the oil sump 11 is suitable for lubricating each kinematic pair of the compression mechanism (such as the main bearing 2, the auxiliary bearing 3, the crankshaft 4 and the cylinder assembly) of the compressor 100 to ensure the normal operation of the compression mechanism, thereby prolonging the service life of the compressor 100.

A cylinder assembly is provided in the housing 1, the cylinder assembly comprising at least one cylinder 5. The cylinder 5 has a suction chamber for sucking a refrigerant to be compressed (e.g., a low-temperature and low-pressure refrigerant), and a discharge chamber for compressing the refrigerant to be compressed and discharging the compressed refrigerant (e.g., a high-temperature and high-pressure refrigerant). The cylinder assembly may comprise only one cylinder 5, in which case the compressor 100, for example a horizontal compressor, is a single-cylinder compressor, which is shown in fig. 2 and 4 for illustrative purposes, but it is obvious to a person skilled in the art, after reading the following technical solutions, to apply the solutions to a multi-cylinder compressor having two or more cylinders 5, which also falls within the scope of the present invention. The multi-cylinder compressor can avoid the torque fluctuation problem of a single cylinder compressor.

The main bearing 2 is arranged at one axial end of the cylinder assembly, and the auxiliary bearing 3 is arranged at the other axial end of the cylinder assembly. For example, in the example of fig. 2, the main bearing 2 is provided at the left end in the axial direction of the cylinder assembly, and the sub-bearing 3 is provided at the right end in the axial direction of the cylinder assembly.

The frame 6 is provided on a side of the main bearing 2 remote from the cylinder assembly (for example, the left side in fig. 2), and the frame 6 is sealingly connected to both the housing 1 and the main bearing 2 and defines a receiving space. That is, the frame 6 and the shell 1 are hermetically connected, the frame 6 and the main bearing 2 are hermetically connected, and an accommodating space is defined between the frame 6 and the shell 1. As shown in fig. 2 and 4, the main bearing 2, the cylinder assembly, the sub-bearing 3, the oil sump 11, and the like are located in the accommodating space.

Specifically, referring to fig. 2 and 4, the housing 6 may include a housing body 61 and a housing flange 62, the housing body 61 may be formed in a circular ring shape, and a housing hole 63 is formed at the center of the housing body 61. The frame flange 62 is disposed around the outer periphery of the frame body 61 and extends toward a direction away from the axial end surface of the frame body 61, wherein the extending direction of the frame flange 62 may be perpendicular to the axial end surface of the frame body 61. The frame 6 may be ring welded to the inner circumferential wall of the housing 1. Therefore, the sealing performance between the frame 6 and the shell 1 can be improved, and the process is simple and convenient to process.

According to an embodiment of the present invention, the case 1 may be provided with a welding groove 12, and the welding groove 12 may have a trapezoidal or triangular cross-sectional shape. The welding recess 12 may be located at a middle position of the frame flange 62. Here, it should be noted that the "middle portion" in the present application refers to a middle portion in a broad sense, and a position between both ends (for example, left and right ends in fig. 2) of the frame flange 62 may be understood as a middle position. In the assembling process, the shell 1 can be welded in an outer ring mode, in the welding process, the shell 1 and the rack flanging 62 can be integrated by dissolving the thin wall of the shell 1 at a high temperature, and the rack 6 and the shell 1 are fixed and sealed.

Further, at least one of the left and right ends of the frame flange 62 may be end-welded to the housing 1. Specifically, the left end of the frame flange 62 may be welded to the housing 1, the right end of the frame flange 62 may be welded to the housing 1, or both the left end and the right end of the frame flange 62 may be welded to the housing 1. Thereby, the reliability and the sealing property of the connection of the chassis 6 and the housing 1 are further improved.

In particular, the frame 6 and the main bearing 2 may be sealed by a sealing gasket 22. The main bearing 2 and the frame 6 can be fixedly connected by screws 64. For example, referring to fig. 2 and 4, during the assembly process, the frame 6 may be welded to the inner peripheral wall of the housing 1, the sealing gasket 22 is then disposed on the side of the frame body 61 adjacent to the oil pool 11 (e.g., the right side in fig. 2), the main bearing 2 is then placed on the surface of the sealing gasket 22 through the frame hole 63, and finally the main bearing 2 is fixed to the frame 6 by the screw 64, so as to achieve the sealing and fixing between the frame 6 and the housing 1 and between the frame 6 and the main bearing 2.

One end (e.g., the right end in fig. 2 and 4) of the crankshaft 4 passes through the main bearing 2 and protrudes into the cylinder 5, and the other end (e.g., the left end in fig. 2 and 4) of the crankshaft 4 protrudes out of the accommodation space. A transmission mechanism 8 may be provided at the other end of the crankshaft 4 to rotate the crankshaft 4. Specifically, a piston 51 is provided in the cylinder 5, and the piston 51 is rollable along the inner circumferential wall of the cylinder 5. The piston 51 may be fitted over the eccentric portion 41 of the crankshaft 4. When the transmission mechanism 8 works, the transmission mechanism 8 drives the crankshaft 4 to rotate so as to drive the piston 51 sleeved on the crankshaft to roll along the inner peripheral wall of the cylinder 5 to compress the refrigerant to be compressed entering the cylinder 5. The piston 51 has an inner cavity of the piston 51, and the piston 51 may have a hollow circular ring structure with two open ends.

Alternatively, the transmission 8 may be fixedly coupled to the crankshaft 4 by a shaft pin 101 or a threaded fastener, but is not limited thereto.

A dynamic seal 7 is provided between the main bearing 2 and the crankshaft 4 to seal a gap between the main bearing 2 and the crankshaft 4. Specifically, referring to fig. 2-4, the dynamic seal 7 may be disposed adjacent to an end of the main bearing 2 distal from the secondary bearing 3 (e.g., the left end in fig. 2 and 4). The dynamic seal 7 can prevent the one end of the main bearing 2 from being communicated with the outside at low pressure, thereby preventing leakage of refrigerant and refrigerant oil or invasion of outside air.

Here, it should be noted that "dynamic seal" is a seal between relatively moving parts in a machine (or equipment). The dynamic seal is divided into a reciprocating dynamic seal and a rotary dynamic seal. The reciprocating dynamic seal comprises a forming packing seal, a packing box seal and an expansion ring seal.

According to the compressor 100 provided by the embodiment of the invention, the frame 6 is arranged in the shell 1, the frame 6 is respectively connected with the shell 1 and the main bearing 2 in a sealing manner, and the movable sealing element 7 is arranged between the crankshaft 4 and the main bearing 2, so that the sealing performance of the compressor 100 is improved, the sealing problem which is difficult to solve by the traditional semi-closed compressor 100 is solved, the size and the weight of the compressor 100 are reduced, the energy efficiency and the reliability of the compressor 100 are improved, the structure is simple, and the assembly is easy.

According to some embodiments of the invention, the main bearing 2 is formed with a bore adapted to pass through the crankshaft 4, the bore having an inner wall formed with a receiving groove 21 for receiving the dynamic seal 7. Referring to fig. 2, 3 and 4, the inner bore is formed as a through hole, and the crankshaft 4 may be clearance-fitted into the inner bore of the main bearing 2. The longitudinal section of the dynamic seal 7 may be formed substantially in a U shape or the like, but is not limited thereto. Specifically, the receiving groove 21 may be formed by recessing an end surface of one side (e.g., the left side in fig. 2 and 4) of the main bearing 2 away from the cylinder assembly toward the direction of the cylinder assembly, and has a simple structure, convenient processing, and easy assembly.

For example, during the assembly process, the dynamic seal 7 may be first fitted on the outer circumferential wall of the crankshaft 4, and then the crankshaft 4 is inserted through the inner hole of the main bearing 2, so that the dynamic seal 7 is received in the receiving groove 21.

Further, referring to fig. 2 to 5, the main bearing 2 is provided with a baffle plate 23, and an inner wall of the main bearing 2 is provided with a baffle plate groove for fixing the baffle plate 23, and the baffle plate groove may be formed by a portion of the inner wall of the main bearing 2 being recessed toward a direction away from the central axis of the main bearing 2. The flapper groove may be formed at an end (e.g., left end in fig. 2) of the dynamic seal 7 remote from the cylinder assembly, and the above-mentioned end of the dynamic seal 7 may be stopped against the flapper 23. This prevents the movable seal 7 from slipping out of the housing groove 21, stabilizes the position of the movable seal 7, and improves the sealing performance between the crankshaft 4 and the main bearing 2.

Further, a surface of one side (e.g., a right side in fig. 2 and 4) of the dynamic seal member 7 adjacent to the cylinder 5 and a corresponding wall surface of the receiving groove 21 are spaced apart from each other to define a cavity 211. From this, can hold the refrigeration oil of revealing through cavity 211, and can realize that the inside high pressure of piston 51 is to the low pressure transition of the one end of keeping away from the cylinder assembly of main bearing 2, avoided effectively that dynamic seal 7 damages because of excessively extrudeing, guaranteed compressor 100's leakproofness, reduced and revealed the risk, improved compressor 100's reliability.

Specifically, a suction hole is formed in the cylinder 5, a relief hole 24 is formed in the main bearing 2, one end (e.g., the left end in fig. 2 and 4) of the relief hole 24 communicates with the cavity 211, and the other end (e.g., the right end in fig. 2 and 4) of the relief hole 24 communicates with the suction hole. Therefore, leaked refrigerating oil and refrigerant can be guaranteed to flow back to the air cylinder 5 and the oil pool 11 from the air suction hole, the phenomenon that the pressure difference between the inside and the outside of the shell 1 is too large due to the fact that the pressure of the end of the main bearing 2 is too large is prevented, and accordingly leakage risks are reduced.

The crankshaft 4 is formed with a first oil supply hole 42 and a second oil supply hole 43, the first oil supply hole 42 extending in the axial direction of the crankshaft 4, one end (e.g., the lower end in fig. 2) of the second oil supply hole 43 communicating with the first oil supply hole 42, and the other end (e.g., the upper end in fig. 2) of the second oil supply hole 43 communicating with the cavity 211. Wherein the first oil supply hole 42 on the crankshaft 4 is formed as a blind hole penetrating one end (e.g., the right end in fig. 2) of the crankshaft 4 adjacent to the oil sump 11.

Further, at least one of the main bearing 2 and the auxiliary bearing 3 is provided with an oil supply channel 25, and one end of the oil supply channel 25 is communicated with the oil pool 11. Specifically, the oil supply passage 25 may be provided only in the main bearing 2, or the oil supply passage 25 may be provided only in the sub-bearing 3, or the oil supply passages 25 may be provided in both the main bearing 2 and the sub-bearing 3. Wherein the oil supply passage 25 may be formed at a side of the main bearing 2 and the sub bearing 3 close to the oil sump 11. The oil supply passage 25 may supply oil by a pressure difference. Specifically, the oil pool 11 is a high-pressure area, and the first oil supply hole 42, the second oil supply hole 43, the pressure relief hole 24 of the main bearing 2 and the air suction hole of the cylinder 5 are connected with a barrel to realize low pressure at two ends of the main bearing 2. The refrigerant oil in the oil pool 11 flows to the main bearing 2, the auxiliary bearing 3, the piston 51, the sliding vane and other moving friction pairs through the pressure difference.

Specifically, the casing 1 has a vent hole 13, and the vent hole 13 is located on a side (e.g., an upper side in fig. 4) of the casing 1 away from the oil pool 11. Further, a filtering structure 9 is arranged on the exhaust passage communicated with the exhaust hole 13, and the filtering structure 9 is used for carrying out oil-gas separation on the refrigerant flowing through the exhaust passage. Therefore, excessive refrigerating oil can be prevented from being discharged to the outside of the compressor 100, and the refrigerating efficiency and reliability of the compressor 100 are ensured. It is understood that an oil separation structure may be further provided outside the compressor 100 such that the separated resultant refrigerant oil flows back to the inside of the compressor 100.

According to some embodiments of the present invention, the air suction part 52 is connected to the air suction port of the air cylinder 5, and the air suction part 52 is provided with a gas-liquid separation device therein, so that liquid slugging caused by the liquid refrigerant sucked into the air cylinder 5 can be avoided, and the reliability of the compressor 100 is improved.

Specifically, the positioning and mounting structure 10 is provided on the compressor 100, thereby effectively improving the stability of the compressor 100.

According to the compressor 100 provided by the embodiment of the invention, the operation of the compressor 100 can be realized by connecting the external transmission mechanism 8, and the compressor 100 is simple in structure, high in energy efficiency, good in reliability, light in weight and easy to assemble.

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

1. A compressor, comprising:

a housing having an oil sump therein;

a cylinder assembly disposed within the housing, the cylinder assembly including at least one cylinder;

the main bearing is arranged at one end of the cylinder assembly in the axial direction;

the auxiliary bearing is arranged at the other end of the cylinder assembly in the axial direction;

the frame is arranged on one side, far away from the cylinder assembly, of the main bearing, and the frame, the shell and the main bearing are hermetically connected and define an accommodating space;

one end of the crankshaft penetrates through the main bearing and extends into the cylinder, and the other end of the crankshaft extends out of the accommodating space;

a dynamic seal provided between the main bearing and the crankshaft to seal a gap between the main bearing and the crankshaft;

the transmission mechanism is arranged at the other end of the crankshaft to drive the crankshaft to rotate, the main bearing is provided with an inner hole which is suitable for penetrating through the crankshaft, the inner wall of the inner hole is provided with a containing groove for containing the dynamic sealing element, a side surface of the dynamic sealing member adjacent to the cylinder and a corresponding wall surface of the receiving groove are spaced apart from each other to define a cavity, an air suction hole is formed on the air cylinder, a pressure relief hole is formed on the main bearing, one end of the pressure relief hole is communicated with the cavity, the other end of the pressure relief hole is communicated with the air suction hole, a first oil supply hole and a second oil supply hole are formed on the crankshaft, the first oil supply hole extends along the axial direction of the crankshaft, one end of the second oil supply hole is communicated with the first oil supply hole, and the other end of the second oil supply hole is communicated with the cavity.

2. The compressor of claim 1, wherein the receiving groove is formed by a side end surface of the main bearing away from the cylinder assembly being recessed toward a direction of the cylinder assembly.

3. The compressor according to any one of claims 1 to 2, wherein an oil supply passage is provided in at least one of the main bearing and the sub bearing, and one end of the oil supply passage communicates with the oil sump.

4. The compressor of claim 1, wherein the housing has a vent hole located on a side of the housing remote from the oil sump.

5. The compressor of claim 4, wherein a filter structure is provided on a discharge passage communicating with the discharge hole, the filter structure being configured to separate oil from gas of the refrigerant flowing through the discharge passage.

6. The compressor of claim 1, wherein the compressor is a vertical compressor or a horizontal compressor.