CN105822551B - The pump housing of compressor and compressor with it - Google Patents
The pump housing of compressor and compressor with it Download PDFInfo
- Publication number
- CN105822551B CN105822551B CN201610327312.2A CN201610327312A CN105822551B CN 105822551 B CN105822551 B CN 105822551B CN 201610327312 A CN201610327312 A CN 201610327312A CN 105822551 B CN105822551 B CN 105822551B
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- Prior art keywords
- pump housing
- eccentric part
- piston
- thrust piece
- compressor
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Classifications
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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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
- F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
- F04C18/3562—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation
- F04C18/3564—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member the inner and outer member being in contact along one line or continuous surfaces substantially parallel to the axis of rotation the surfaces of the inner and outer member, forming the working space, being surfaces of revolution
-
- 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
- F04C2240/20—Rotors
-
- 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
-
- 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
- F04C2240/60—Shafts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of pump housing of compressor and with its compressor.The pump housing includes: cylinder, two bearings, crankshaft, piston and slide plate, and cylinder includes body part and extension, and body part and extension are separately machined molded part；Two bearings are respectively provided at the two sides of cylinder, at least one bearing is spinning part；Crankshaft includes main shaft and the eccentric part that is located on main shaft, and the top of eccentric part has upper thrust piece, and the bottom of eccentric part has lower thrust piece, and main shaft and eccentric part are steel pipe；Piston is hollow structure and piston is steel construction piece；Slide plate is steel construction piece.The pump housing according to an embodiment of the present invention, the cost of the pump housing can largely be reduced, reduce the machining expense of part, the wall thickness of Pump Body Parts can suitably be reduced, mitigate the weight of the pump housing, and pump housing rigidity can be improved in steel construction, improve pump housing fit-up gap, is conducive to the performance for improving compressor.
Description
Technical field
The present invention relates to compressor field, the pump housing more particularly, to a kind of compressor and the compressor with it.
Background technique
Six component of the pump housing of existing rotary compressor, using solid casting, weight is big, higher cost, roughing chip
The deficiencies of surplus is big；Secondly, the physical characteristic of casting, other than wearability is good, remaining index elasticity modulus, tensile strength are equal
It is lower, to reduce the performance of the pump housing.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.
For this purpose, the present invention proposes a kind of pump housing of compressor, can largely reduce the pump housing cost, can be appropriate
The wall thickness for reducing Pump Body Parts mitigates the weight of the pump housing, and pump housing rigidity can be improved in steel construction, improves pump housing assembly building
Gap is conducive to the performance for improving compressor.
The present invention also proposes a kind of compressor with the above-mentioned pump housing.
The pump housing of compressor according to an embodiment of the present invention, comprising: cylinder, the cylinder include body part and extension,
Compression chamber is limited in the body part, the extension is located on the periphery wall of the body part, and the cylinder, which is equipped with, to be slided
Film trap, the head of the sliding vane groove is through the inner wall of the body part and the tail portion of the sliding vane groove is located on the extension,
The body part and the extension are separately machined molded part；Two bearings, described two bearings are respectively provided at the cylinder
Two sides, at least one described bearing be spinning part；Crankshaft, the crankshaft pass through the cylinder to support described two bearings,
The crankshaft includes main shaft and the eccentric part that is located on the main shaft, and the top of the eccentric part has a upper thrust piece, it is described partially
The bottom of center portion has lower thrust piece, and the main shaft and the eccentric part are steel pipe；Piston, the piston jacket is described inclined
In center portion and it is located in the compression chamber, the piston is hollow structure and the piston is steel construction piece；Slide plate, the slide plate
It is reciprocally located in the sliding vane groove and the apex of the slide plate is contacted with the periphery wall of the piston, the slide plate is
Steel construction piece.
The pump housing of compressor according to an embodiment of the present invention, by make cylinder include separately machined molding body part and
Extension, at least one bearing be spinning part, the main shaft of crankshaft and eccentric part be steel pipe, piston is hollow structure and piston is
Steel construction piece, slide plate are steel construction piece, so as to largely reduce the cost of the pump housing, reduce the machining expense of part
With can suitably reduce the wall thickness of Pump Body Parts, mitigate the weight of the pump housing, and pump housing rigidity can be improved in steel construction, improves
Pump housing fit-up gap is conducive to the performance for improving compressor.
In some embodiments of the invention, the body part is round steel pipe, and the extension is the one of round steel pipe
Section cutting member.
In some embodiments of the invention, the value range of the thickness of the body part and the extension be 5~
15mm。
In some embodiments of the invention, the extension and the body part are welded to connect.
In some embodiments of the invention, for be made the steel plate of the spinning part thickness value range be 3~
10mm。
In some embodiments of the invention, the upper thrust piece is formed as steel pipe and the upper thrust piece is weldingly fixed on
On the main shaft and the eccentric part；Or the upper thrust piece and the eccentric part are integrally formed part.
In some embodiments of the invention, the upper surface of the eccentric part be horizontal plane and the upper thrust piece with it is described
First Transition inclined-plane is equipped between the upper surface of eccentric part；Or the upper surface of the eccentric part is by the upper of the upper thrust piece
Surface tilts down the inclined-plane of extension.
In some embodiments of the invention, the lower thrust piece is formed as steel pipe and the lower thrust piece is weldingly fixed on
On the main shaft and the eccentric part；Or the lower thrust piece and the eccentric part are integrally formed part.
In some embodiments of the invention, the lower end surface of the eccentric part be horizontal plane and the lower thrust piece with it is described
The second intermediate incline is equipped between the lower end surface of eccentric part；Or the lower end surface of the eccentric part is by under the lower thrust piece
Surface tilts the inclined-plane of extension upwards.
In some embodiments of the invention, the internal perisporium of the eccentric part is equipped with groove, a part of the main shaft
It accommodates in the groove.
In some embodiments of the invention, first is limited between the outer periphery and the eccentric part of the upper thrust piece
Oil circuit gap.
In some embodiments of the invention, second is limited between the outer periphery and the eccentric part of the lower thrust piece
Oil circuit gap.
In some embodiments of the invention, the piston includes: the first lengths of steel pipes；Second lengths of steel pipes, second steel
Pipeline section housing has gap in first lengths of steel pipes and between first lengths of steel pipes and second lengths of steel pipes；Closing
Section, the closed section are connected respectively with the axial ends of first lengths of steel pipes and second lengths of steel pipes to close the gap
Form the cavity of the piston.
Further, the closed section, which is respectively welded, is fixed in first lengths of steel pipes and second lengths of steel pipes.
In some embodiments of the invention, it is filled with gas in the cavity of the piston, the pressure of the gas is located at
Between the pressure at expulsion and pressure of inspiration(Pi) of the compressor.
In some embodiments of the invention, the piston is equipped with the through-hole for the cavity being connected in the piston.
Compressor according to an embodiment of the present invention, the pump housing including compressor according to the above embodiment of the present invention.
Compressor according to an embodiment of the present invention, by the way that the pump housing according to the above embodiment of the present invention is arranged, so as to
It largely reduces the cost of the pump housing, reduce the machining expense of part, can suitably reduce the wall thickness of Pump Body Parts, mitigate
The weight of the pump housing, and pump housing rigidity can be improved in steel construction, improves pump housing fit-up gap, is conducive to the property for improving compressor
Can, while the unbalance mass, of compressor mitigates because the eccentric part Mass lost and piston mass of crankshaft reduce, counterweight
Quality mitigates and height becomes smaller, and the main screw lift of compressor can mitigate.
Detailed description of the invention
Fig. 1 is the sectional view according to the pump housing of the compressor of the embodiment of the present invention；
Fig. 2 is the top view according to the pump housing of the compressor of the embodiment of the present invention；
Fig. 3 is the decomposition diagram according to the pump housing of the compressor of the embodiment of the present invention；
Fig. 4 is the top view according to the piston of the embodiment of the present invention；
Fig. 5 is the sectional view according to the piston of the embodiment of the present invention；
Fig. 6 is the decomposition diagram according to the crankshaft of one embodiment of the invention；
Fig. 7 is the sectional view of crankshaft shown in fig. 6；
Fig. 8 is the schematic diagram according to the crankshaft of another embodiment of the present invention；
Fig. 9 be crankshaft shown in Fig. 8 in eccentric part, upper thrust piece and lower thrust piece schematic diagram；
Figure 10 is the schematic diagram according to the crankshaft of further embodiment of the present invention；
Figure 11 be crankshaft shown in Fig. 10 in eccentric part, upper thrust piece and lower thrust piece schematic diagram.
Appended drawing reference:
The pump housing 100,
Crankshaft 1, main shaft 11, first segment 111, second segment 112, eccentric part 12, upper surface 121, First Transition inclined-plane 122a,
Second intermediate incline 122b, lower end surface 123, groove 124, upper thrust piece 13, lower thrust piece 14, oilhole 15, the first oil circuit gap
16, the second oil circuit gap 17,
Base bearing 4, supplementary bearing 5,
Piston 6, the second lengths of steel pipes 61, closed section 62, cavity 63, through-hole 64, upper chamfering 65, falls down at first lengths of steel pipes 60
Angle 66,
Cylinder 7, body part 70, extension 71, compression chamber 70a, sliding vane groove 72,
Slide plate 8.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings.Below with reference to
The embodiment of attached drawing description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected or can communicate each other；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the interaction relationship of the connection or two elements inside two elements, unless otherwise restricted clearly.For this field
For those of ordinary skill, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
The pump housing 100 of compressor according to an embodiment of the present invention is described in detail below with reference to Fig. 1-Figure 11.It is understood that
It is that compressor includes the elements such as shell and motor, the pump housing 100 and motor are respectively provided in shell, and motor includes stator and rotor.
The pump housing 100 of compressor according to an embodiment of the present invention, comprising: 7, two bearings of cylinder, crankshaft 1, piston 6 and cunning
Piece 8.Cylinder 7 includes body part 70 and extension 71, limits compression chamber 70a in body part 70, extension 71 is located at body part
On 70 periphery wall, cylinder 7 is equipped with sliding vane groove 72, the inner wall and sliding vane groove 72 of the head of sliding vane groove 72 through body part 70
Tail portion is located on extension 71, and body part 70 and extension 71 are separately machined molded part.That is, when processing cylinder 7,
Extension 71, is then fixed on body part 70 by first machine-shaping body part 70 and extension 71.To by by body part
70 and extension 71 be provided separately, material can be made full use of, that is, cost saved manufacture material, avoid waste of material, drop
Low cost.
Two bearings are respectively provided at the two sides of cylinder 7, at least one bearing is spinning part.Specifically, two bearings are
Base bearing 4 and supplementary bearing 5, base bearing 4 and supplementary bearing 5 are located at the two sides of cylinder 7, and base bearing 4 and/or supplementary bearing 5 are spinning part.
Preferably, two bearings are spinning part.Specifically, the material that spinning part is made is steel plate.Still optionally further, for being made
The value range of the thickness of the steel plate of spinning part is 3~10mm.Specifically, the material of steel plate can be compared with for plastic formability
Good medium carbon steel or mild steel, such as 20#~45# carbon steel.Further, bearing can also be surface-treated for example hot
Handle the quenched wear-resisting property to improve the intensity of the rear bearing of molding and the diameter of axle inner hole of bearing.
Wherein it is understood that spinning part is made up of spinning process.Spinning process is to make workpiece by rotational workpieces
Stress point by putting to line, then by line to face, at the same some direction hobboing cutter give certain pressure make metal material along
The technique that this Direction distortion forms a certain shape with flowing.The major advantage of spinning process includes: 1) local continuous processing,
Deformation force is small；2) rotary pressing processing precision is high, and dimensional tolerance reaches IT8, and up to 3.2, the intensity and hardness of workpiece improve roughness；3) material
Expect that utilization rate is high, die cost is low, and 1/5th of only common punch die, suitable for mass production, good economy performance.
To which by making at least one bearing be spinning part, the weight for being conducive to reduce bearing blank is (in some implementations
In example, 25% or more of blank weight is advantageously reduced), the processing cost of bearing is reduced, to advantageously reduce the valence of bearing
Lattice, and the spinning part made of spinning process has high dimensional accuracy, high intensity, high rigidity, high rigidity and high bullet
Property modulus, to be conducive to improve whole dimensional accuracy, intensity, hardness, rigidity and the elasticity modulus of bearing, and guaranteeing
On the basis of bearing integral strength and hardness, the wall thickness of spinning part can also be reduced, to reduce the size of bearing.
Crankshaft 1 passes through cylinder 7 to support two bearings, and crankshaft 1 includes main shaft 11 and the eccentric part 12 being located on main shaft 11,
Main shaft 11 is fixed on rotor to be driven and be rotated by rotor.The top of eccentric part 12 has upper thrust piece 13, the bottom of eccentric part 12
Portion has lower thrust piece 14, and main shaft 11 and eccentric part 12 are steel pipe.It is understood that lower thrust piece 14 plays support piston
6 and eccentric part 12 effect, upper thrust piece 13 play the role of limit eccentric part 12 axial displacement.
Wherein determined due to the eccentricity of crankshaft 1 by the radial dimension of main shaft 11 and eccentric part 12, by using
The crankshaft 1 of the available different eccentricity of the main shaft 11 and eccentric part 12 of different calibers, meets the needs of eccentricity is changeable.It can
Selection of land, the thickness of steel pipe of main shaft 11 are set as 2~8mm, and the steel pipe thickness of eccentric part 12 is set as 2~8mm.Specifically, main shaft
11 and the material of eccentric part 12 can be the preferable medium carbon steel of welding performance or mild steel, such as 20#~45# carbon steel, into
One step can also be surface-treated such as heat treatment quenching and tempering, nitridation intensity to improve crankshaft 1 and wear-resisting to crankshaft 1
Performance.
6 housing of piston is on eccentric part 12 and is located in compression chamber 70a, and piston 6 is hollow structure and piston 6 is steel construction
Part.Slide plate 8 is reciprocally located in sliding vane groove 72 and the apex of slide plate 8 is contacted with the periphery wall of piston 6, and slide plate 8 is steel
Structural member.Specifically, the material of slide plate 8 can be that high-speed steel or stainless steel further can also carry out surface to slide plate 8
Handle the intensity and wear-resisting property that slide plate 8 is improved such as carburizing, nitridation.
The pump housing 100 of compressor according to an embodiment of the present invention, by making cylinder 7 include separately machined molding ontology
It is steel pipe, piston 6 is empty that portion 70 and extension 71, at least one bearing, which are spinning part, the main shaft 11 of crankshaft 1 and eccentric part 12,
Core structure and piston 6 are steel construction piece, slide plate 8 is steel construction piece, so as to largely reduce the pump housing 100 cost,
The machining expense for reducing part can suitably reduce the wall thickness of 100 part of the pump housing, mitigate the weight of the pump housing 100, and steel knot
100 rigidity of the pump housing can be improved in structure, improves 100 fit-up gap of the pump housing, is conducive to the performance for improving compressor.
1- attached drawing 11 is respectively described the structure of cylinder 7, piston 6, crankshaft 1 below with reference to the accompanying drawings.
Cylinder 7:
In some embodiments of the invention, body part 70 is round steel pipe, and extension 71 is that one section of round steel pipe is cut
Cutter member.It specifically, can first be the round steel pipe edge of predetermined size by a pipe thickness in the manufacturing process of cylinder 7
Radial cuts are multistage, wherein one section can be used as body part 70；It then is the circle of predetermined size by another pipe thickness
Steel pipe, at multiple arcs section, forms multiple extensions 71 along axially cutting；Then one of segmental arc is selected, by the segmental arc
Inner wall be connected with the outside wall surface of body part 70, obtain the semi-finished product of cylinder 7；Finally by certain process (such as finishing
Work, surface treatment etc.), obtain the finished product of cylinder 7.
For example, the outer diameter of the body part 70 of cylinder 7 is less than the outer diameter of extension 71 and is equal to extension 71
Internal diameter, can be along the axially cutting extension 71 is divided into five of the round steel pipe for manufacturing extension 71
Point, the section of every part is all formed as arc section, and the round steel pipe for being used to manufacture extension 71 can be used as five gas in this way
The extension 71 of cylinder 7, takes full advantage of material.
The body part 70 of the cylinder 7 and extension 71 can be made by round steel pipe as a result, manufactured cylinder 7
Structural strength it is big, have the advantages of high-intensitive, high rigidity, since the elasticity modulus of steel is 1.3 times or so of casting,
The cylinder 7 of steel can more preferably reduce the various stress deformations of the pump housing 100, be conducive to cylinder 7 and be further thinned, with the relevant technologies
In 7 casting of cylinder compare, the blank of the cylinder 7 is light-weight, wall thickness is thin, has advantageously reduced the cost of roughing process.
The structure can also reinforce the intensity of 72 bottom outlet junction of sliding vane groove, improve the processing of sliding vane groove 72, reduce the pump housing
100 operating when, 7 inner wall of cylinder and piston 6 and 7 slot bad gap of slide plate 8 and cylinder influence.Furthermore by cutting a Duan Yuan
The available multiple extensions 71 of shape steel pipe, both cost saved manufacture material, avoid the waste of material, reduce cost, again
Manufacturing process can be reduced, convenient for the General design of cylinder 7.
Optionally, the value range of the thickness of body part 70 and extension 71 is 5~15mm.Specifically, body part 70
Material with extension 71 can be the preferable medium carbon steel of welding performance or mild steel, such as 20#~45# carbon steel.
According to one embodiment of present invention, the outside wall surface of body part 70 and the inner wall of extension 71 are weldingly connected.Example
Such as, the outside wall surface of body part 70 and the inner wall of extension 71 are weldingly connected by argon arc welding, soldering or Laser Welding.When
So, the body part 70 of the embodiment of the present invention and the welding method of extension 71 are not limited to this, the outside wall surface of body part 70 with prolong
The inner wall of extending portion 71 can also be realized by other welding manners and be connected.Thus, it is possible to realize body part 70 and extension 71
Be fixedly connected, guarantee structural strength, the connection reliability of the cylinder 7, improve the use reliability of the cylinder 7.Furthermore ontology
Portion 70 and extension 71 are in the welding process, convenient and simple for operation, due to the good welding performance of steel part, by Steel material system
At body part 70 connect reliably with extension 71.
Wherein, the inner wall of body part 70 is equipped with sliding vane groove 72, and the inner wall of sliding vane groove 72 is equipped with local soft nitriding layer, phosphatization
Layer, molybdenum layer or plating nickel coating.In other words, after body part 70 is connect with extension 71, finishing step is first passed around, then
Corresponding Wear-resistant Treatment, surface treatment can be carried out to cylinder 7, to meet the high-precision requirement of cylinder 7.
For example, can the inner wall of sliding vane groove 72 to cylinder 7 carry out at the conventional surface for reducing abrasion such as phosphatization, molybdenum
Reason, so that the surface quality of the cylinder 7 is improved, to be conducive to improve the reliability of the cylinder 7.Therefore, which can
To reinforce the intensity of 72 bottom outlet junction of sliding vane groove, improve the processing of sliding vane groove 72, reduce the pump housing 100 when operating, cylinder 7 it is interior
The influence of wall and roller and 7 slot bad gap of slide plate 8 and cylinder.
In other specific embodiments of the invention, extension 71 is connect with 70 screw of body part.That is,
In the manufacturing process of cylinder 7, the round steel pipe that a pipe thickness is predetermined size radially can be cut first, obtain this
Body portion 70；Then by round steel pipe that another pipe thickness is predetermined size along axially cutting at multiple arcs section, formed more
A extension 71；Then it selects one of segmental arc, the segmental arc and body part 70 is achieved a fixed connection by screw, obtain
To the semi-finished product of cylinder 7；Finally pass through certain process, obtains the finished product of cylinder 7.
Preferably, extension 71 can be connect with body part 70 by junction of the edges of two sheets of paper screw, which can be to avoid influence
The assembly of cylinder 7 and other components.Cylinder 7 prepared by the above method, structure is simple, and bonding strength is high, is convenient to mount and dismount, cylinder
For 7 body part 70 and extension 71 after damage, replacement is convenient, can be to avoid waste of material.
Crankshaft 1:
Crankshaft 1 includes main shaft 11, eccentric part 12, upper thrust piece 13 and lower thrust piece 14, it is to be understood that main shaft 11,
Fixed form between eccentric part 12, upper thrust piece 13 and lower thrust piece 14 can be it is varied, as long as meeting the strong of crankshaft 1
Degree requires.
As shown in Figure 6 and Figure 7, in some embodiments of the invention, upper thrust piece 13 is formed as steel pipe and upper thrust piece
13 are weldingly fixed on main shaft 11 and eccentric part 12.That is, upper thrust piece 13 is also made of steel pipe, so that crankshaft 10
Structure it is simple.Preferably, soldering connection can be used between upper thrust piece 13 and main shaft 11 and eccentric part 12, can be stopped to upper
Push piece 13, which carries out corresponding Wear-resistant Treatment, such as molybdenum phosphatization etc. routinely, reduces the surface treatment of abrasion.It will be understood
It is that upper thrust piece 13 and eccentric part 12 may be to be integrally formed part.
In some embodiments of the invention, as shown in Figure 6 and Figure 7, lower thrust piece 14 is formed as steel pipe and lower thrust piece
14 are weldingly fixed on main shaft 11 and eccentric part 12.That is, lower thrust piece 14 is made of steel pipe, so that crankshaft 10
Structure is simple.Preferably, soldering connection can be used between lower thrust piece 14 and main shaft 11 and eccentric part 12, it can be to lower thrust
Part 14, which carries out corresponding Wear-resistant Treatment, such as molybdenum phosphatization etc. routinely, reduces the surface treatment of abrasion.Of course, it should be understood that
Lower thrust piece 14 and eccentric part 12 can also be integrally formed part.
In some embodiments of the invention, a part of internal perisporium of eccentric part 12 is welded on the periphery wall of main shaft 11
On.Further, as shown in figs, the periphery wall of main shaft 11 is equipped with recessed channel, and a part of eccentric part 12 is welded on recessed
Enter in slot, that is to say, that main shaft 11 includes first segment 111 and second segment 112, and the outer diameter of second segment 112 is less than first segment 111
Outer diameter, eccentric part 12 are welded on the periphery wall of second segment 112, so as to increase bonding area, are improved between two steel pipes
Weld strength.It preferably, is soldering connection between main shaft 11 and eccentric part 12.Of course, it should be understood that main shaft 11 and bias
It can also be using welding techniques such as laser weldings between portion 12.
It needs to illustrate herein, the lower part of the second segment 112 of main shaft 11 is matched with the supplementary bearing 5 of compressor 100
Close, the setting of the outer diameter of second segment 112 it is smaller, the contact area of crankshaft 1 Yu supplementary bearing 5 can also be reduced, so as to subtract
Few abrasion.Certainly, it is consistent (as shown in Figure 6 and Figure 7) to be also possible to outer diameter for main shaft 11.
Further, referring to Fig. 8 and Fig. 9, the bottom of upper thrust piece 13 and first segment 111 offsets.Thus being convenient for will be eccentric
Portion 12 and main shaft 11 are attached fixation, and increase the contact area of eccentric part 12 Yu main shaft 11, so as to improve crankshaft 1
Structural strength and stability.
Fluted 124 are formed on the internal perisporium of eccentric part 12 in some embodiments of the invention referring to Fig. 9 and Figure 11,
A part of main shaft 11 is contained in groove 124.For example, it may be a part of the second segment 112 of main shaft 11 is contained in groove
In 124.Thus, it is possible to increase the contact area of main shaft 11 Yu eccentric part 12, so as to improve the structural strength of crankshaft 1.Example
Such as, when main shaft 11 and eccentric part 12 are welded to connect, the bonding area of main shaft 11 Yu eccentric part 12 can be increased, so as to improve
Weld strength.Optionally, the adhered shape of the shape of the periphery wall of main shaft 11 and groove 124, it is possible thereby to further improve
The structural stability of crankshaft 1.
In addition, passing through the radial depth for changing 12 upper groove 124 of eccentric part, thus it is possible to vary thus the eccentricity of crankshaft 1 exists
It, can be by processing the groove 124 of different radial depths to be formed not in the case that the caliber of eccentric part 12 and main shaft 11 is selected
With the crankshaft 1 of eccentricity, so as to further meet the needs of eccentricity is changeable.
Optionally, soldering connection (such as copper brazing connects in furnace) or Laser Welding can be passed through between main shaft 11 and eccentric part 12
Connection.Welding deformation can reduce by above-mentioned welding manner as a result, improve the welding quality of crankshaft 1.
In addition, oilhole 15 can also be respectively equipped on main shaft 11 and eccentric part 12 referring to Fig. 8-Figure 11.It is understood that
It is that, when eccentric part 12 to be fixed on main shaft 11, the oilhole 15 of corresponding position simultaneously can also be on main shaft 11 and eccentric part 12
It is used as fabrication hole.Specifically, the fastening such as pin can be first passed through when eccentric part 12 to be weldingly fixed on main shaft 11
Part sequentially passes through the oilhole 15 on eccentric part 12 and main shaft 11, so as to position eccentric part 12, is then welded again, by
This makes eccentric part 12 and the welding positioning of main shaft 11 more convenient.It, can be with after eccentric part 12 and the welding of main shaft 11 are completed
Above-mentioned pin is removed.
Referring to Fig. 8 and Fig. 9, in some embodiments of the invention, the upper surface 121 of eccentric part 12 is horizontal plane and above stops
First Transition inclined-plane 122a, such as shown in figure 9, the First Transition are equipped between push piece 13 and the upper surface 121 of eccentric part 12
Inclined-plane 122a downwards and is tilted to the right from the edge of upper thrust piece 13 and extends to the upper surface 121 of eccentric part 12.As a result, can
The weight of the eccentric part 12 of crankshaft 1 is reduced, so as to reduce the centrifugal intertia force of 100 eccentric mass of compressor generation, is improved
The reliability of compressor 100, and material saving, reduce cost.It needs to illustrate herein, " eccentric part 12 described in this paragraph
Upper surface 121 " refer to that the top of eccentric part 12 removes the part of upper thrust piece 13 and First Transition inclined-plane 122a.
Optionally, be formed in the upper end of eccentric part 12 upper thrust piece 13 can be thrust piece 13 by with eccentric part 12
It is integrally machined, is also possible to be formed by machining eccentric part 12.
Optionally, lower thrust piece 14 can be identical with the structure of upper thrust piece 13, it is possible thereby to keep the structure of crankshaft 1 even
Claim.
For example, similarly, the lower end surface 123 of eccentric part 12 is the lower end surface of horizontal plane and lower thrust piece 14 and eccentric part 12
Also is provided with the second intermediate incline 122b between 123, such as shown in figure 8, the second intermediate incline 122b from lower thrust piece 14
Edge upwards and is tilted to the right and extends to the lower end surface 123 of eccentric part 12.Thus, it is possible to be further reduced the weight of eccentric part 12
Amount, it can reduce the weight of the eccentric part 12 of crankshaft 1, improve the reliability of compressor 100, and material saving, reduce cost.
It needs to illustrate herein, " lower end surface 123 of eccentric part 12 " described in this paragraph refers to that the bottom of eccentric part 12 removes lower stop
The part of push piece 14 and the second intermediate incline 122b.
Optionally, be formed in the lower end of eccentric part 12 lower thrust piece 14 can be lower thrust piece 14 by with eccentric part 12
It is integrally machined, is also possible to be formed by machining eccentric part 12.
0 and Figure 11 referring to Fig.1, in other embodiments of the invention, the upper surface 121 of eccentric part 12 is by upper thrust
The upper surface of part 13 tilts down the inclined-plane of extension, such as shown in Figure 10 and Figure 11, and the inclined-plane is from the edge of upper thrust piece 13
Downwards and it is tilted to the right and extends to the outer edge of eccentric part 12.Thus, it is possible to it is further reduced the weight of eccentric part 12, so as to
To reduce the centrifugal intertia force of 100 eccentric mass of compressor generation, the reliability of compressor 100, and material saving, reduction are improved
Cost.It needs to illustrate herein, " upper surface 121 of eccentric part 12 " described in this paragraph refers to that the top of eccentric part 12 removes
The part of upper thrust piece 13.
In some embodiments of the invention, as shown in Figure 10, the lower end surface 123 of eccentric part 12 can be for by lower thrust piece
14 following table, which faces upward, tilts the inclined-plane of extension.It needs to illustrate herein, " the lower end surface of eccentric part 12 described in this paragraph
123 " refer to that the bottom of eccentric part 12 removes the part of lower thrust piece 14.
In some embodiments of the invention, as shown in fig. 7, being limited between the outer periphery of upper thrust piece 13 and eccentric part 12
First oil circuit gap 16 out.To which the intracorporal lubricating oil of shell can enter main shaft 11 and eccentric part by the first oil circuit gap 16
Between 12, the pump housing 100 is then lubricated by the oilhole 15 of crankshaft 1, extends the service life of the pump housing 100.
In some embodiments of the invention, as shown in fig. 7, being limited between the outer periphery of lower thrust piece 14 and eccentric part 12
Second oil circuit gap 17 out.To which the intracorporal lubricating oil of shell can enter main shaft 11 and eccentric part by the second oil circuit gap 17
Between 12, the pump housing 100 is then lubricated by the oilhole 15 of crankshaft 10, extends the service life of the pump housing 100.
Piston 6:
As shown in figure 5, in some embodiments of the invention, piston 6 includes: the first lengths of steel pipes 60, the second lengths of steel pipes 61
With closed section 62.Second lengths of steel pipes, 61 housing has in the first lengths of steel pipes 60 and between the first lengths of steel pipes 60 and the second lengths of steel pipes 61
There is gap.Closed section 62 is connected with the axial ends of the first lengths of steel pipes 60 and the second lengths of steel pipes 61 respectively forms work with closing gap
The cavity 63 of plug 6.
That is, piston 6 is mainly made of the first lengths of steel pipes 60, the second lengths of steel pipes 61 and closed section 62, wherein first
Lengths of steel pipes 60 and the second lengths of steel pipes 61 are all formed as the round tube that (up and down direction as shown in Figure 5) extends along the vertical direction, and
Second lengths of steel pipes 61 is set in the outside of the first lengths of steel pipes 60 and is coaxially disposed with the first lengths of steel pipes 60, outside the first lengths of steel pipes 60
Side wall and the inner sidewall of the second lengths of steel pipes 61 are arranged spaced apart, and closed section 62 includes two, and two closed sections 62 are respectively provided at the
The top and bottom of one lengths of steel pipes 60, and the inner end for the closed section 62 being located above is connected with the upper end of the first lengths of steel pipes 60,
The outer end of the closed section 62 is connected with the upper end of the second lengths of steel pipes 61, and the inner end of underlying closed section 62 and the first steel pipe
The lower end of section 60 is connected, and the outer end of the closed section 62 is connected with the lower end of the second lengths of steel pipes 61, so that closed section 62, first
The cavity 63 of piston 6 is limited between lengths of steel pipes 60 and the second lengths of steel pipes 61.
The structure of the piston 6 of the compressor is simple as a result, each component connection is compact, is simple to manufacture, and both can reduce the work
The quality of plug 6, the piston 6 can reduce the weight of balance weight, to reduce cost, and can be reduced pressure within the compressor
The power consumption of contracting machine improves the efficiency of compressor.
Specifically, the wall thickness of the first lengths of steel pipes 60 and the second lengths of steel pipes 61 can be set to 0.5~2.5mm, and material can be with
For the preferable medium carbon steel of welding performance or mild steel, such as 20#~45# carbon steel, bearing steel 20Cr etc..It is possible to further right
First lengths of steel pipes 60 and the second lengths of steel pipes 61 carry out including the process of surface treatment such as heat treatment quenching and tempering, carburizing, nitridation to improve work
The intensity and wear-resisting property of plug 6.
Preferably, two closed sections 62 are respectively formed as annular, the inner ring of each closed section 62 respectively with the first lengths of steel pipes
60 one end is connected, and the outer ring of each closed section 62 is connected with corresponding one end of the second lengths of steel pipes 61 respectively.
Specifically, the closed section that two closed sections 62 are formed as the annular element arranged in the horizontal direction, and are located above
62 inner ring is connected with the upper end of the first lengths of steel pipes 60, the upper end of the outer ring for the closed section 62 being located above and the second lengths of steel pipes 61
It is connected, and the inner ring of underlying closed section 62 is connected with the lower end of the first lengths of steel pipes 60, underlying closed section 62
Outer ring is connected with the lower end of the second lengths of steel pipes 61, so that the closed section 62 of annular closes the first lengths of steel pipes 60 and the second lengths of steel pipes 61
Between gap top and bottom.
As shown in figure 5, in certain specific embodiments of the invention, 61 1 bodily form of closed section 62 and the second lengths of steel pipes
At closed section 62 is weldingly connected with the first lengths of steel pipes 60.That is two closed sections 62 respectively along the second lengths of steel pipes 61 radially-inwardly
Extend, and top and bottom of the inner ring of two closed sections 62 respectively with the first lengths of steel pipes 60 are weldingly connected.It is integrally formed as a result,
Structure can not only guarantee the properity stability of piston 6, and facilitate molding, be simple to manufacture, and eliminate it is extra
Assembly parts and connection process, substantially increase the assembly efficiency of piston 6, guarantee the connection reliability of piston 6, furthermore, one
The integral strength and high stability for the structure that body is formed, assembling is more convenient, longer life expectancy.
In other specific embodiments of the invention, closed section 62, which can be respectively welded, is fixed on the first lengths of steel pipes 60
In the second lengths of steel pipes 61.
As shown in figure 5, the inner circle of piston 6 has upper chamfering 65 and lower chamfering 66, further, the connection of piston 6 is synthesized
Seam is located at the upper chamfering 65 or lower chamfering 66 of the inner circle of piston 6.To not influence the assembly of piston 6 finishing and piston 6.
In some embodiments of the invention, it is filled with gas in the cavity 63 of piston 6, the pressure of gas is located at compressor
Pressure at expulsion and pressure of inspiration(Pi) between.It is understood that the value range and pressure at expulsion of the pressure of inspiration(Pi) of compressor
Value range is determining, thus can choose suitable gas pressure so that its between pressure of inspiration(Pi) and pressure at expulsion it
Between.Preferably, the stability of gas is high, such as the stabilizing gas (such as refrigerant) that the perfusion coefficient of heat transfer is poorer than metal.Certainly may be used
It can also be normal pressure in the cavity 63 of piston 6 with understanding.
As shown in figure 4, in some embodiments of the invention, piston 6 is equipped with the through-hole of the cavity 63 in connection piston 6
64.To can suitably reduce work so that the cavity 63 of piston 6 is connected with compressor internal high pressure by setting through-hole 64
The resistance to pressure request of plug 6.As shown in figure 4, synthesizing the company of being equipped at the connecting sewing of piston 6 in some currently preferred embodiments of the present invention
The through-hole 64 of cavity 63 in logical piston 6, consequently facilitating the machine-shaping of piston 6.
Compressor according to an embodiment of the present invention, the pump housing 100 including compressor according to the above embodiment of the present invention.
Compressor according to an embodiment of the present invention, by the way that the pump housing 100 according to the above embodiment of the present invention is arranged, so as to
Largely to reduce the cost of the pump housing 100, reduce the machining expense of part, 100 part of the pump housing can be suitably reduced
Wall thickness mitigates the weight of the pump housing 100, and 100 rigidity of the pump housing can be improved in steel construction, improves 100 fit-up gap of the pump housing, favorably
In the performance for improving compressor, while the unbalance mass, of compressor is because of 6 mass of 12 Mass lost of eccentric part and piston of crankshaft 1
It reduces and mitigates, counterweight quality mitigates and height becomes smaller, and the main screw lift of compressor can mitigate.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (15)
1. a kind of pump housing of compressor characterized by comprising
Cylinder, the cylinder include body part and extension, compression chamber are limited in the body part, the extension is located at institute
It states on the periphery wall of body part, the cylinder is equipped with sliding vane groove, and the inner wall of the body part is run through on the head of the sliding vane groove
And the tail portion of the sliding vane groove is located on the extension, the body part and the extension are separately machined molded part；
Two bearings, described two bearings are respectively provided at the two sides of the cylinder, at least one described bearing is spinning part；
Crankshaft, the crankshaft pass through the cylinder to support described two bearings, and the crankshaft includes main shaft and is located at the master
Eccentric part on axis, the top of the eccentric part have upper thrust piece, and the bottom of the eccentric part has lower thrust piece, the master
Axis and the eccentric part are steel pipe；
Piston, the piston jacket is on the eccentric part and is located in the compression chamber, and the piston is hollow structure and institute
Stating piston is steel construction piece；Gas is filled in the cavity of the piston, the pressure of the gas is located at the row of the compressor
Between atmospheric pressure and pressure of inspiration(Pi)；Or the piston is equipped with the through-hole for the cavity being connected in the piston；
Slide plate, the slide plate is reciprocally located in the sliding vane groove and the periphery of the apex of the slide plate and the piston
Wall contact, the slide plate are steel construction piece.
2. the pump housing of compressor according to claim 1, which is characterized in that the body part is round steel pipe, described to prolong
Extending portion is one section of cutting member of round steel pipe.
3. the pump housing of compressor according to claim 2, which is characterized in that the thickness of the body part and the extension
Value range be 5~15mm.
4. the pump housing of compressor according to claim 2, which is characterized in that the extension and body part welding connect
It connects.
5. the pump housing of compressor according to claim 1, which is characterized in that for the thickness of the steel plate of the spinning part to be made
The value range of degree is 3~10mm.
6. the pump housing of compressor according to claim 1, which is characterized in that the upper thrust piece is formed as steel pipe and described
Upper thrust piece is weldingly fixed on the main shaft and the eccentric part；Or
The upper thrust piece and the eccentric part are integrally formed part.
7. the pump housing of compressor according to claim 1, which is characterized in that the upper surface of the eccentric part be horizontal plane and
First Transition inclined-plane is equipped between the upper thrust piece and the upper surface of the eccentric part；Or
The upper surface of the eccentric part is the inclined-plane that extension is tilted down by the upper surface of the upper thrust piece.
8. the pump housing of compressor according to claim 1, which is characterized in that the lower thrust piece is formed as steel pipe and described
Lower thrust piece is weldingly fixed on the main shaft and the eccentric part；Or
The lower thrust piece and the eccentric part are integrally formed part.
9. the pump housing of compressor according to claim 1, which is characterized in that the lower end surface of the eccentric part be horizontal plane and
The second intermediate incline is equipped between the lower thrust piece and the lower end surface of the eccentric part；Or
The lower end surface of the eccentric part is the inclined-plane for tilting and extending that faced upward by the following table of the lower thrust piece.
10. the pump housing of compressor according to claim 1, which is characterized in that the internal perisporium of the eccentric part is equipped with recessed
A part of slot, the main shaft accommodates in the groove.
11. the pump housing of compressor according to claim 1, which is characterized in that the outer periphery of the upper thrust piece with it is described
The first oil circuit gap is limited between eccentric part.
12. the pump housing of compressor described in any one of -11 according to claim 1, which is characterized in that the lower thrust piece
The second oil circuit gap is limited between outer periphery and the eccentric part.
13. the pump housing of compressor according to claim 1, which is characterized in that the piston includes:
First lengths of steel pipes；
Second lengths of steel pipes, the second lengths of steel pipes housing is in first lengths of steel pipes and first lengths of steel pipes and described second
There is gap between lengths of steel pipes；
Closed section, the closed section are connected respectively to close with the axial ends of first lengths of steel pipes and second lengths of steel pipes
The gap forms the cavity of the piston.
14. the pump housing of compressor according to claim 13, which is characterized in that the closed section, which is respectively welded, is fixed on institute
It states in the first lengths of steel pipes and second lengths of steel pipes.
15. a kind of compressor, which is characterized in that the pump housing including compressor described according to claim 1 any one of -14.
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| CN102767520A (en) * | 2011-05-05 | 2012-11-07 | 广东美芝制冷设备有限公司 | Rotary compressor and its manufacturing method |
| CN103206379B (en) * | 2012-01-16 | 2016-01-06 | 广东美芝制冷设备有限公司 | For slide plate and the manufacture method thereof of rotary compressor |
| CN104895764A (en) * | 2015-06-29 | 2015-09-09 | 安徽美芝制冷设备有限公司 | Crankshaft for reciprocating compressor and reciprocating compressor with crankshaft |
| CN105201783B (en) * | 2015-10-22 | 2017-08-29 | 安徽美芝精密制造有限公司 | Compressor, piston of compressor and preparation method thereof |
| CN205136019U (en) * | 2015-11-02 | 2016-04-06 | 安徽美芝精密制造有限公司 | Compressor air cylinder and rotary compressor employing same |
| CN105257508B (en) * | 2015-11-02 | 2018-05-18 | 安徽美芝精密制造有限公司 | For the bent axle of compressor and with its compressor |
| CN105221424B (en) * | 2015-11-02 | 2017-12-12 | 安徽美芝精密制造有限公司 | Rotary compressor and there is its heat pump |
| CN105464988A (en) * | 2016-02-02 | 2016-04-06 | 安徽美芝精密制造有限公司 | Bearing of compressor and compressor |
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