CN114526218A - Compression mechanism of compressor - Google Patents

Compression mechanism of compressor Download PDF

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Publication number
CN114526218A
CN114526218A CN202210247478.9A CN202210247478A CN114526218A CN 114526218 A CN114526218 A CN 114526218A CN 202210247478 A CN202210247478 A CN 202210247478A CN 114526218 A CN114526218 A CN 114526218A
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CN
China
Prior art keywords
movable frame
bearing
shaft
compression mechanism
piston
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210247478.9A
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Chinese (zh)
Inventor
蒋友荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Value Mechanical & Electrical Products Co ltd
Original Assignee
Zhejiang Value Mechanical & Electrical Products Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Value Mechanical & Electrical Products Co ltd filed Critical Zhejiang Value Mechanical & Electrical Products Co ltd
Priority to CN202210247478.9A priority Critical patent/CN114526218A/en
Publication of CN114526218A publication Critical patent/CN114526218A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0094—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 crankshaft

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

The invention belongs to the technical field of compressors, and particularly relates to a compression mechanism of a compressor. Aiming at the defect of larger abrasion of the existing crosshead shoe compression mechanism, the invention adopts the following technical scheme: the compressing mechanism of compressor, crosshead shoe compressing mechanism includes: a piston reciprocating along a first fixed axis; the movable frame is fixedly connected with the piston; the bearing is arranged in the movable frame, and the outer ring of the bearing is directly or indirectly abutted against the movable frame; the crank is provided with a first shaft and a second shaft which are perpendicular to the first fixed axis, the first shaft and the second shaft have a shaft distance, and the second shaft is fixedly connected with the inner ring of the bearing. The beneficial effects of the invention are: the direct friction can only occur inside the bearing, the outer ring of the bearing and the movable frame, the abrasion inside the bearing can be almost ignored, the rolling friction is formed between the outer ring of the bearing and the movable frame, the friction is small, and therefore the abrasion is greatly reduced.

Description

Compression mechanism of compressor
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to a compression mechanism of a compressor.
Background
US patent No. US8939042B2 discloses a crosshead shoe type compressor, the crosshead shoe device has an outer yoke member mounted for reciprocating movement along a first fixed axis and a multi-piece slide mechanism mounted on a substantially cylindrical crank pin within the outer yoke member, the crank pin extending substantially symmetrically along and about a second axis spaced from and substantially parallel to a third axis, the third axis is fixed relative to the first fixed axis and substantially perpendicular to the first fixed axis, the crank pin including a second axis thereof, the second axis being rotatably driven about the third axis, wherein the multi-piece slide mechanism translates the rotational motion of the crank pin about the third axis into reciprocating motion of the yoke member along the first fixed axis; said multi-piece slide mechanism including at least first and second pieces that respectively slidably move substantially perpendicular to said first fixed axis relative to said outer yoke member, said first and second pieces, said crank pin rotatably receiving said crank pin therebetween and moving substantially perpendicular to said first fixed axis as said yoke piece reciprocates along said first fixed axis, whereby said first and second pieces of said multi-piece slide mechanism abut one another, said crosshead shoe arrangement further including bearing members between respective first and second pieces and said crank pin, said first piece having an abutment surface, said second piece having an abutment surface, said first and second pieces abutting one another in a fixed position relative to one another along respective abutment surfaces, wherein at least one of said abutment surfaces includes a first groove therein, the first groove is aligned in a fixed position relative to the abutment surface of the other of the first and second parts and is in fluid communication with the bearing member, the oldham slide arrangement further including a lubricant between the outer yoke member and the first and second parts, wherein sliding movement of the first and second components relative to the outer yoke member forces lubricant through the first groove to the bearing component.
In the aforesaid us invention patent, the crank rotates to make the slide block eccentrically disposed on the crank slide back and forth along a first direction relative to the movable frame (i.e. the outer yoke member) in the process of rotating along with the crank, and further drive the bracket and the piston on the bracket to move back and forth along a second direction perpendicular to the first direction, so as to achieve compression. However, in the aforesaid us invention patent, the slider is an assembly (to realize the slider is mounted on the small diameter section between the two large diameter sections of the crank), the needle bearing is arranged between the crank and the slider, the steel ball is arranged between the slider and the movable frame, and the crank, the needle bearing, the steel ball and the movable frame are in direct contact, so that the abrasion is large, the machine performance is affected, the structure is complex, and the assembly is difficult.
Disclosure of Invention
Aiming at the defect that the existing crosshead shoe type compressor is large in abrasion, the invention provides a compression mechanism of the compressor so as to reduce abrasion.
In order to achieve the purpose, the invention adopts the following technical scheme: a compression mechanism of a compressor, the compression mechanism comprising:
the movable piece comprises a movable frame and a piston which reciprocate along a first fixed axis;
the bearing is arranged in the movable frame, and the outer ring of the bearing is directly or indirectly abutted against the movable frame;
the crank is provided with a first shaft and a second shaft which are perpendicular to the first fixed axis, the first shaft and the second shaft are provided with shaft intervals, and the second shaft is fixedly connected with the inner ring of the bearing.
According to the compression mechanism of the compressor, the first shaft of the crank is connected with the motor, the motor drives the first shaft of the crank, the bearing on the second shaft of the crank rotates around the axis of the first shaft of the crank, the outer ring of the bearing abuts against the movable frame in the process that the bearing revolves around the axis of the first shaft of the crank, so that the movable frame moves back and forth along the first fixed axis, meanwhile, in the process that the bearing revolves around the axis of the first shaft of the crank, the bearing rotates, direct friction can occur only in the interior of the bearing and between the outer ring of the bearing and the movable frame (when the outer ring of the bearing directly abuts against the movable frame), the abrasion in the bearing can be almost ignored, rolling friction exists between the outer ring of the bearing and the movable frame, the friction is small, and therefore the abrasion is greatly reduced; meanwhile, the number of parts is less, the structure is simplified, and the assembly is easier. When the bearing outer ring indirectly abuts against the movable frame, if the wear-resistant part is fixedly connected to the movable frame, only the inside of the bearing and the space between the bearing outer ring and the wear-resistant part are subjected to direct friction, and the wear is also greatly reduced.
As an improvement, the two pistons are symmetrically arranged relative to the movable frame.
As an improvement, two wear-resistant parts which are symmetrically distributed relative to the second shaft are arranged in the movable frame, and the bearing outer ring is directly abutted to the wear-resistant parts. Through setting up the wearing parts, can need not to change the adjustable shelf through changing the wearing parts, the adjustable shelf also can adopt the lower material of wear resistance to make.
As an improvement, the wear-resistant part is fixed on the movable frame through a screw; the wear-resistant part is U-shaped in cross section.
As an improvement, the movable frame is integrally formed, the processing is easy, and the vibration is reduced.
As an improvement, the movable frame is in a hexahedron shape, the movable frame penetrates up and down to be used for placing the bearing and the wear-resistant part, and the left and the right of the movable frame are respectively connected with the two pistons.
As an improvement, the movable frame and the piston are integrally formed.
As an improvement, the piston is provided with a first threaded hole, the movable frame is provided with a second threaded hole, and the piston is connected with the movable frame through screws arranged in the first threaded hole and the second threaded hole.
As an improvement, the movable frame comprises a frame, the frame extends outwards to form a hole opening part, and the second threaded hole is formed in the hole opening part.
As an improvement, the compression mechanism further comprises a fixing frame, a cylinder cavity arranged on the fixing frame, and a connecting cylinder communicated with the cylinder cavity, wherein the piston is arranged in the cylinder cavity, the cylinder cavity is provided with an air inlet valve core and an air outlet valve core, the connecting cylinder is provided with an air inlet connector and an air outlet connector, and the fixing frame is provided with a notch for the piston to pass through.
As an improvement, the second shaft of the crank is an equal-diameter shaft, and the outer end of the second shaft is the end part of the crank.
As an improvement, the bearing is a deep groove ball bearing.
Another compression mechanism of a compressor of the present invention includes:
a piston reciprocating along a first fixed axis;
the movable frame is fixedly connected with the piston;
the eccentric bearing is arranged in the movable frame, and the outer ring of the eccentric bearing is directly or indirectly abutted against the movable frame.
According to the other compression mechanism of the compressor, the motor directly drives the eccentric bearing to rotate, the eccentric bearing abuts against the movable frame and enables the piston to reciprocate along the first fixed axis, the crank can be omitted while abrasion is reduced, and the compression mechanism can be applied to occasions with low requirements on piston stroke.
The compression mechanism of the compressor has the advantages that: in the process that the motor drives the piston to reciprocate, only the inside of the bearing and the outer ring of the bearing and the movable frame (when the outer ring of the bearing is directly abutted against the movable frame) are subjected to direct friction, the abrasion in the bearing can be almost ignored, the rolling friction is formed between the outer ring of the bearing and the movable frame, and the friction is small, so that the abrasion is greatly reduced; while reducing noise.
Drawings
Fig. 1 is a schematic structural view of a compression mechanism according to a first embodiment of the present invention.
Fig. 2 is an exploded view of the compression mechanism according to the first embodiment of the present invention.
Fig. 3 is a sectional view of a compression mechanism according to a first embodiment of the present invention.
Fig. 4 is a schematic structural view of a crank of a compression mechanism according to a first embodiment of the present invention.
Fig. 5 is a schematic structural view of a fixing frame of a compression mechanism according to a first embodiment of the present invention.
Fig. 6 is a schematic structural view of a wear-resistant member of a compression mechanism according to a first embodiment of the present invention.
Fig. 7 is a schematic structural view of a compression mechanism according to a second embodiment of the present invention.
Fig. 8 is a partial exploded view of the compression mechanism according to the second embodiment of the present invention.
Fig. 9 is a sectional view of a compression mechanism according to a second embodiment of the present invention.
Fig. 10 is a schematic structural view of a movable frame of a compression mechanism according to a first embodiment of the present invention.
In the figure, 1, crank; 11. a first shaft; 12. a second shaft;
2. a deep groove ball bearing;
3. a wear part;
4. a movable frame;
5. a piston;
6. a cylinder chamber;
7. a connecting cylinder;
8. a valve core assembly; 81. an air inlet valve core; 82. an air outlet valve core;
9. a joint assembly; 91. an air inlet joint; 92. an air outlet joint;
10. a fixed mount; 101. and (4) a notch.
Detailed Description
The technical solutions of the embodiments of the present invention will be explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and are not all embodiments. Other embodiments obtained by persons skilled in the art without any inventive work based on the embodiments in the embodiment belong to the protection scope of the invention.
Referring to fig. 1 to 10, a compression mechanism of a compressor of the present invention includes:
the movable piece comprises a movable frame and a piston which reciprocate along a first fixed axis;
the bearing is arranged in the movable frame, and the outer ring of the bearing is directly or indirectly abutted against the movable frame;
the crank is provided with a first shaft and a second shaft which are perpendicular to the first fixed axis, the first shaft and the second shaft are provided with shaft intervals, and the second shaft is fixedly connected with the inner ring of the bearing.
The first shaft of the crank is connected with the motor, the motor drives the first shaft of the crank, the bearing on the second shaft of the crank rotates around the axis of the first shaft of the crank, the outer ring of the bearing abuts against the movable frame in the process that the bearing revolves around the axis of the first shaft of the crank, so that the movable frame moves back and forth along the first fixed axis, meanwhile, in the process that the bearing revolves around the axis of the first shaft of the crank, the bearing rotates, direct friction can occur only in the inner part of the bearing and between the outer ring of the bearing and the movable frame (when the outer ring of the bearing directly abuts against the movable frame), the abrasion in the bearing can be almost ignored, rolling friction exists between the outer ring of the bearing and the movable frame, and the friction is smaller, so that the abrasion is greatly reduced. When the bearing outer ring indirectly abuts against the movable frame, if the wear-resistant part is fixedly connected to the movable frame, only the inside of the bearing and the space between the bearing outer ring and the wear-resistant part are subjected to direct friction, and the wear is also greatly reduced.
Example one
Referring to fig. 1 to 6, a compression mechanism of a compressor according to a first embodiment of the present invention includes:
a piston 5 reciprocating along a first fixed axis;
the movable frame 4 is fixedly connected with the piston 5;
the bearing is arranged in the movable frame 4, and the outer ring of the bearing is directly or indirectly abutted against the movable frame 4;
the crank 1 is provided with a first shaft 11 and a second shaft 12 which are perpendicular to the first fixed axis, the first shaft 11 and the second shaft 12 have an axle distance, and the second shaft 12 is fixedly connected with an inner ring of the bearing.
In this embodiment, two pistons 5 are symmetrically disposed with respect to the movable frame 4.
In this embodiment, the movable frame 4 is provided with two wear-resistant members 3 symmetrically distributed with respect to the second shaft 12, and the bearing outer ring directly abuts against the wear-resistant members 3. Through setting up wearing parts 3, can be through changing wearing parts 3 and need not to change adjustable shelf 4, adjustable shelf 4 also can adopt the lower material of wear resistance to make.
In this embodiment, the wear-resistant part 3 is fixed on the movable frame 4 through a screw, a counter bore is formed in the wear-resistant part 3, a threaded hole is formed in the movable frame 4, and the screw penetrates through the counter bore in the wear-resistant part 3 and is screwed into the threaded hole in the movable frame 4.
In this embodiment, the wear-resistant part 3 has a U-shaped cross section.
In this embodiment, the movable frame 4 is integrally formed, so that the processing is easy, and compared with an assembly structure, the vibration can be reduced.
In this embodiment, the movable frame 4 is a hexahedron, the movable frame 4 penetrates up and down to accommodate the bearing, and the left and right of the movable frame 4 are connected to the two pistons 5 respectively. The wear-resistant part 3 and the deep groove ball bearing 2 enter the movable frame 4 from the up-down direction. The first fixed axis direction is a left-right direction, and the axial direction of the second shaft 12 is a front-rear direction.
In this embodiment, the movable frame 4 and the piston 5 are integrally formed.
In this embodiment, the compression mechanism further includes a fixing frame 10, a cylinder chamber 6 disposed on the fixing frame 10, and a connecting cylinder 7 communicated with the cylinder chamber 6, the piston 5 is disposed in the cylinder chamber 6, the cylinder chamber 6 is provided with an air inlet valve core 81 and an air outlet valve core 82, the connecting cylinder 7 is provided with an air inlet joint 91 and an air outlet joint 92, and the fixing frame 10 is provided with a notch 101 for the piston 5 to pass through. The movable frame 10 is in a shape of a Chinese character 'hui'.
In this embodiment, the second shaft 12 of the crank 1 is an equal-diameter shaft, and the outer end of the second shaft 12 is the end of the crank 1, so that the deep groove ball bearing 2 can be easily mounted on the second shaft 12.
In other embodiments, a shaft section with a smaller diameter than the second shaft 12 may be formed at the end of the second shaft 12 away from the first shaft 11.
In the present embodiment, the bearing is a deep groove ball bearing 2. In other embodiments, other types of bearings may be used.
In this embodiment, the first axis 11 of the crank 1 is located in the center of the fixed frame.
The working principle of the compression mechanism of the compressor provided by the first embodiment of the invention is as follows: the crank 1 is driven to rotate by a motor (not shown in the figure), the deep groove ball bearing 2 on the second shaft 12 of the crank 1 revolves around the first shaft 11 of the crank 1, the deep groove ball bearing 2 abuts against the wear-resistant part 3 on the movable frame 4, the deep groove ball bearing 2 pushes the movable frame 4, the movable frame 4 pushes and pulls the piston 5, the piston 5 linearly reciprocates, the movable frame 4 pulls the piston 5, the volume of one side, away from the movable frame 4, of the cylinder chamber 6 is rapidly increased to form a low-pressure area, the air inlet valve core 81 is sucked from an air suction port, the air exhaust valve core is closed at the same time, air inlet is realized, when the movable frame 4 pushes the piston 5, the volume of one side, away from the movable frame 4, of the cylinder chamber 6 is rapidly reduced to form a high-pressure area, the air inlet valve core 81 is closed, the air exhaust valve core is moved out from an air outlet at the same time, and air outlet is realized.
The compression mechanism of the compressor provided by the embodiment one of the invention has the beneficial effects that: in the process that the motor drives the piston 5 to reciprocate, only the inside of the bearing and the space between the outer ring of the bearing and the wear-resistant part 3 are subjected to direct friction, the wear in the bearing can be almost ignored, the space between the outer ring of the bearing and the wear-resistant part 3 is rolling friction, the rolling of the deep groove ball bearing 2 replaces the sliding of the existing sliding block, the friction is small, and therefore the wear is greatly reduced; meanwhile, noise is reduced; the deep groove ball bearing 2 is adopted, and the deep groove ball bearing 2 is of a closed structure, is lubricated by grease, and has stable performance and long service life; the movable frame and the piston are integrally formed, so that the number of parts is less, the structure is simplified, and the assembly is easier.
Example two
Referring to fig. 7 to 10, the second embodiment is different from the first embodiment in that the movable frame and the piston are connected by a screw.
In this embodiment, the piston 5 is provided with a first threaded hole, the movable frame 4 is provided with a second threaded hole, and the piston 5 and the movable frame 4 are connected through screws arranged in the first threaded hole and the second threaded hole.
In this embodiment, the movable frame 4 includes a frame, the frame extends outward to form a hole portion, and the second threaded hole is opened in the hole portion.
In this embodiment, the fixing frame 10 does not need to be provided with a notch.
EXAMPLE III
The compression mechanism of the compressor of the third embodiment of the present invention includes:
a piston reciprocating along a first fixed axis;
the movable frame is fixedly connected with the piston;
the eccentric bearing is arranged in the movable frame, and the outer ring of the eccentric bearing is directly or indirectly abutted against the movable frame.
In the other compression mechanism of the compressor, the motor directly drives the eccentric bearing to rotate, the eccentric bearing abuts against the movable frame and enables the piston to reciprocate along the first fixed axis, so that the crank can be omitted while the abrasion is reduced, and the compression mechanism can be applied to occasions with lower requirements on the piston stroke.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the invention is not limited thereto but is intended to cover all modifications and equivalents as may be included within the spirit and scope of the invention. Any modification which does not depart from the functional and structural principles of the invention is intended to be included within the scope of the following claims.

Claims (10)

1. The compressing mechanism of the compressor is characterized in that: the compression mechanism includes:
the movable piece comprises a movable frame (4) and a piston (5) which reciprocate along a first fixed axis;
the bearing is arranged in the movable frame (4), and the outer ring of the bearing is directly or indirectly abutted against the movable frame (4);
the crank (1) is provided with a first shaft (11) and a second shaft (12) which are perpendicular to the first fixed axis, the first shaft (11) and the second shaft (12) have a shaft distance, and the second shaft (12) is fixedly connected with an inner ring of the bearing.
2. The compression mechanism of a compressor according to claim 1, wherein: two wear-resistant parts (3) which are symmetrically distributed relative to the second shaft (12) are arranged in the movable frame (4), and the outer ring of the bearing is directly abutted to the wear-resistant parts (3).
3. The compression mechanism of a compressor according to claim 2, wherein: the wear-resistant part (3) is fixed on the movable frame (4) through a screw; the section of the wear-resistant part (3) is U-shaped.
4. The compression mechanism of a compressor according to claim 1, wherein: the two pistons (5) are symmetrically arranged relative to the movable frame (4).
5. The compression mechanism of a compressor according to claim 4, wherein: the movable frame (4) is integrally formed; the movable frame (4) is hexahedral, the movable frame (4) is vertically communicated, and the left side and the right side of the movable frame (4) are respectively connected with the two pistons (5).
6. The compression mechanism of a compressor according to claim 5, wherein: first screw hole is seted up in piston (5), the second screw hole is seted up in adjustable shelf (4), piston (5) and adjustable shelf (4) are through locating screw in first screw hole and the second screw hole links to each other, adjustable shelf (4) include the frame, the frame outwards extends and forms trompil portion, the second screw hole is seted up in the trompil portion.
7. The compression mechanism of a compressor according to claim 4, wherein: the movable frame (4) and the piston (5) are integrally formed.
8. The compression mechanism of a compressor according to claim 7, wherein: compressing mechanism still includes mount (10), locates cylinder chamber (6) on mount (10), with connecting cylinder (7) that cylinder chamber (6) are linked together, piston (5) are located in cylinder chamber (6), be equipped with air inlet valve core (81) and air outlet valve core (82) on cylinder chamber (6), be equipped with air inlet connector (91) and air outlet connector (92) on connecting cylinder (7), set up the confession on mount (10) breach (101) that piston (5) pass through.
9. The compression mechanism of a compressor according to claim 1, wherein: a second shaft (12) of the crank (1) is an isometric shaft, and the outer end of the second shaft (12) is the end part of the crank (1); the bearing is a deep groove ball bearing (2).
10. The compressing mechanism of the compressor is characterized in that: the compression mechanism includes:
a piston (5) reciprocating along a first fixed axis;
the movable frame (4) is fixedly connected with the piston (5);
the eccentric bearing is arranged in the movable frame (4), and the outer ring of the eccentric bearing is directly or indirectly abutted against the movable frame (4).
CN202210247478.9A 2022-03-14 2022-03-14 Compression mechanism of compressor Pending CN114526218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210247478.9A CN114526218A (en) 2022-03-14 2022-03-14 Compression mechanism of compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210247478.9A CN114526218A (en) 2022-03-14 2022-03-14 Compression mechanism of compressor

Publications (1)

Publication Number Publication Date
CN114526218A true CN114526218A (en) 2022-05-24

Family

ID=81626681

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210247478.9A Pending CN114526218A (en) 2022-03-14 2022-03-14 Compression mechanism of compressor

Country Status (1)

Country Link
CN (1) CN114526218A (en)

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