WO2018090813A1

WO2018090813A1 - Permanent magnet linear double-cylinder compressor

Info

Publication number: WO2018090813A1
Application number: PCT/CN2017/108124
Authority: WO
Inventors: 黄仲冬; 尹艳辉
Original assignee: 深圳市华一传动技术有限公司
Priority date: 2016-11-15
Filing date: 2017-10-27
Publication date: 2018-05-24
Also published as: CN106382198A; CN106382198B

Abstract

Provided is a permanent magnet linear double-cylinder compressor (100), comprising: a case (10), both ends of the case (10) being covered and connected with an end cap (30); two compression cylinder bodies (50), one compression cylinder body (50) being fixedly connected to one end cap (30); two pistons (20), one piston (20) extending into one compression cylinder (50) and sliding linearly in the compression cylinder (50); a linear motor (70), received in the casing (10) and comprising a stator assembly fixedly connected with the casing (10), and a mover assembly (73) arranged in the stator assembly; and two movable links (40), one end of each movable link (40) being hinged with one end of the mover assembly (73), and the other end of the movable link (40) being hinged with one end of the piston (20). The permanent magnet linear double-cylinder compressor (100) is highly efficient.

Description

Permanent magnet linear double cylinder compressor

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. CN201611024934.4, entitled "Permanent Magnet Linear Double Cylinder Compressor", filed on November 15, 2016, the entire contents of which is incorporated herein by reference. in.

Technical field

The invention relates to a permanent magnet linear two-cylinder compressor.

Background technique

The compressor is a driven fluid machine that promotes low pressure gas to high pressure gas and is the heart of the refrigeration system. The existing linear compressor generally rigidly connects and aligns the mover, the piston and the cylinder, so that the friction generated between the cylinder and the piston is large, and the efficiency of the compressor needs to be improved.

Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a permanent magnet linear two-cylinder compressor designed to increase the efficiency of the compressor.

In order to achieve the above object, a permanent magnet linear two-cylinder compressor according to the present invention comprises: a casing, the two ends of the casing are respectively connected and connected with an end cover; two compression cylinders, one of the compression cylinders is fixedly connected to the The end cap; two pistons, one of the pistons extending into the compression cylinder and linearly sliding in the compression cylinder; a linear motor housed in the casing, the linear motor including the same a stator assembly fixedly coupled to the casing, and a mover assembly disposed in the stator assembly; and two movable links, one end of each of the movable links being hinged to one end of the mover assembly, and the other end being One end of the piston is hinged.

Preferably, the mover assembly includes a drive shaft, and the two ends of the drive shaft are respectively formed with a first mounting slot, and the two opposite slot walls of the first mounting slot are open to the first of the first mounting slots. a through hole, a first mounting portion is formed at an end of each of the movable links adjacent to the mover assembly, the first mounting portion is provided with a first connecting hole, and the first mounting portion is engaged with the first In the mounting groove, the transmission shaft and the movable link are fastened by a cooperation of a pin with the first through hole and the first connecting hole.

Preferably, one end of each of the movable links away from the mover assembly is formed with a second mounting portion, the second mounting portion is provided with a second connecting hole, and the piston is formed near one end of the movable link. a second mounting slot, the two opposite slot walls of the second mounting slot are provided with a second through hole communicating with the second mounting slot, and the piston and the movable link pass through the pin and the second through hole and The two connection holes are fastened to each other.

Preferably, the end faces of the first mounting portion and the second mounting portion are each formed with a rounded arc surface, and the bottom walls of the first mounting groove and the second mounting groove are formed with the rounded curved surface Fit the abutting arc.

Preferably, the mover assembly further includes at least two coupling brackets fixedly coupled to a peripheral wall of the drive shaft, to Having two of the coupling brackets disposed radially symmetrically of the transmission shaft, each of the coupling brackets is mounted with at least one permanent magnet, and the stator assembly includes a plurality of spaced annular arrangements within the casing The winding unit, the coupling bracket extends into a gap between the two winding units.

Preferably, each of the coupling brackets is provided with at least one shaft hole extending in the axial direction of the transmission shaft, and the permanent magnet linear motor further includes a guide rod passing through each of the shaft holes The end of the guiding rod is fixedly connected with the end cover, and the mover assembly linearly reciprocates along the guiding rod.

Preferably, the linear motor further includes an elastic member sleeved at an end of the transmission shaft.

Preferably, the plurality of winding units are arranged with at least two layers in the longitudinal direction of the mover assembly.

Preferably, each of the winding units includes a winding housing connected to the casing and a stator core housed in the winding housing, and the winding housing is wound with a winding coil.

Preferably, each of the end caps is further provided with a valve device having an exhaust valve and an intake valve respectively communicating with the compression cylinder.

The technical scheme of the present invention connects the mover assembly and the piston in the linear compressor through a movable link, and the two ends of the movable link and the mover assembly and the piston are hinged with a certain rotation capability, and then linear During the working process of the compressor, when the mover assembly pushes the piston to linearly slide in the compression cylinder, the movable link can automatically correct the concentricity deviation generated between the mover assembly, the piston and the compression cylinder, thereby reducing the piston and the compression cylinder. The friction between the bodies can also prevent the concentricity of the mover assembly, the piston and the compression cylinder from being stuck in a straight line, so that the permanent magnet linear twin-cylinder compressor of the invention has stable operation and low noise. High efficiency.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without any creative work.

1 is a schematic exploded view showing an embodiment of a permanent magnet linear two-cylinder compressor according to the present invention;

2 is a schematic exploded view of another perspective view of the permanent magnet linear twin-cylinder compressor of FIG. 1;

3 is a partial structural schematic view of the permanent magnet linear twin-cylinder compressor of FIG. 1.

Description of the reference numerals:

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back, ...) in the embodiments of the present invention are only used to explain between components in a certain posture (as shown in the drawing). Relative positional relationship, motion situation, etc., if the specific posture changes, the directional indication also changes accordingly.

In the present invention, the terms "connected", "fixed" and the like should be understood broadly, unless otherwise clearly defined and limited. For example, "fixed" may be a fixed connection, or may be a detachable connection, or may be integrated; It may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship of two elements unless explicitly defined otherwise. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In addition, the descriptions of "first", "second", and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, "first" and "second" are defined The feature may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.

The present invention provides a permanent magnet linear twin cylinder compressor 100.

Referring to FIG. 1 to FIG. 3, in the embodiment of the present invention, the permanent magnet linear two-cylinder compressor includes a casing 10, two compression cylinders 50, two pistons 20, a linear motor 70, and two movable links 40, Both ends of the shell 10 are connected and connected with end caps 30. The inner surfaces of each end cap 30 are fixedly connected with a compression cylinder 50, and each piston 20 projects into a compression cylinder 50 and is in the compression cylinder 50. In-line linear sliding, wherein the linear motor 70 is housed in the casing 10, the linear motor 70 includes a stator assembly fixedly coupled to the casing 10, and a mover assembly 73 disposed in the stator assembly, each movable link 40 One end is hinged to one end of the mover assembly 73, and the other end is hinged to one end of a piston 20.

The permanent magnet linear twin-cylinder compressor of the present embodiment is provided with a valve device 90 on the outer surface of each end cap 30. The valve device 90 has an exhaust valve and an intake valve respectively communicating with the compression cylinder 50. The valve device 90 is composed of a seat cover having two cavities and a plurality of metal gaskets stacked on each other. The exhaust valve and the suction valve are formed on the metal gaskets in the plurality of metal gaskets and respectively correspond to the two cavities of the seat cover. Driven by the mover assembly 73 of the linear motor 70, the two pistons 20 of the compressor move in one direction, and the piston 20 at one end of the compressor compresses the gas in the compression cylinder 50, at which time the compression cylinder The suction valve of the valve device 90 of the body 50 is closed, and the exhaust valve is opened to discharge the high pressure gas, and the suction valve of the valve device 90 at the other end of the compressor is opened, the exhaust valve is closed, and the piston 20 is pulled. The external air is sucked into the compression cylinder 50 by the action, so that the permanent magnet linear two-cylinder compressor of the present invention continuously outputs high-pressure gas during the reciprocating motion of the mover assembly 73, and has high working efficiency.

The technical solution of the present invention connects the mover assembly 73 and the piston 20 in the linear compressor through a movable link 40, and both ends of the movable link 40 and the mover assembly 73 and the piston 20 have a certain rotation capability. The articulation is such that when the mover assembly 73 pushes the piston 20 to linearly slide within the compression cylinder 50 during linear compressor operation, the movable link 40 automatically corrects between the mover assembly 73, the piston 20, and the compression cylinder 50. The concentricity deviation generated thereby reduces the friction between the piston 20 and the compression cylinder 50, and also prevents the concentricity of the mover assembly 73, the piston 20, and the compression cylinder 50 from being stuck in a straight line. The permanent magnet linear two-cylinder compressor of the invention has the characteristics of stable operation, low noise and high efficiency.

Specifically, the mover assembly 73 includes a drive shaft 731. The two ends of the drive shaft 731 are respectively formed with a first mounting slot 7311. The two opposite slot walls of the first mounting slot 7311 are firstly connected with the first mounting slot 7311. The through hole 7131 has a first mounting portion formed at one end of the movable link 40 near the mover assembly 73. The first mounting portion is provided with a first connecting hole 42. The first mounting portion is inserted into the first mounting groove 7311. The transmission shaft 731 and the movable link 40 are fastened by the cooperation of the pin 60 with the first through hole 7313 and the first connection hole 42.

A second mounting portion is formed at one end of each of the movable link 40 away from the mover assembly 73, and a second connecting hole 44 is defined in the second mounting portion. The piston 20 is adjacent to the movable link 40 to form a second mounting. The groove 22 and the two opposite groove walls of the second mounting groove 22 are provided with a second through hole 24 communicating with the second mounting groove 22, and the piston 20 and the movable link 40 pass through the pin 60 and the second through hole 24 and the second connecting hole 44. The fit is fastened to the connection.

In this embodiment, a mounting groove structure is formed at an end portion of the transmission shaft 731 and an end portion of the piston 20, and a through hole is formed in two opposite groove walls of the mounting groove. After the first mounting portion and the second mounting portion are engaged with the mounting groove, The pin 60 passes through the connecting hole and the through hole and is mounted on the transmission shaft 731 or the piston 20, so that the transmission shaft 731 and the movable link 40, and the movable link 40 and the piston 20 are connected through the shaft hole to have a certain swing adjustment function. During the movement of the piston 20, the concentricity between the mover assembly 73, the piston 20 and the compression cylinder 50 is automatically adjusted, and the ends of the pin 60 are stressed. During the movement of the piston 20, the pin 60 is sheared. The force is relatively uniform, and the connection structure of the movable link 40 and the piston 20 or the transmission shaft 731 is stabilized.

In order to further improve the stability during the operation of the compressor, the end faces of the first mounting portion and the second mounting portion of the movable link 40 of the present embodiment are each formed into a rounded curved surface 46, the first mounting groove 7311 and the second mounting. The bottom wall of the groove 22 is formed as an abutting curved surface that abuts against the rounded curved surface 46. During the movement of the mover assembly 73 through the push piston 20 of the movable link 40, the drive shaft 731 exerts a force on the movable link 40 by the engagement of the abutting curved surface and the rounded curved surface 46, so that the pin 60 can be further reduced. The shearing force reduces the mechanical fatigue of the pin 60 and prolongs the service life, while the compressor of the present invention operates more securely.

Referring to FIGS. 2 and 3, the mover assembly 73 further includes at least two coupling brackets 733 fixedly coupled to the peripheral wall of the drive shaft 731, and at least two coupling brackets 733 are radially symmetric with respect to the transmission shaft 731. It is provided that each of the coupling brackets 733 is mounted with at least one permanent magnet 735, and the stator assembly includes a plurality of winding units 71 arranged in an annular arrangement in the casing 10, and the plurality of winding units 71 are on the axis of the moving subassembly 73. At least two layers are arranged in the direction, and a coupling bracket 733 extends into a gap between two adjacent winding units 71.

The coupling bracket 733 of the embodiment is a frame structure, the permanent magnet 735 is a flat structure, and the permanent magnet 735 is embedded in the frame of the coupling bracket 733. The gap between the two winding units 71 is along the axis of the transmission shaft 731. Extend. After the permanent magnet linear two-cylinder compressor is energized and turned on, after the winding coils 715 in the stator assembly are electrically conducted, the upper and lower reverse electromagnetic fields are formed in the axial direction of the linear motor 70 to push or pull the mover assembly. 73 linearly reciprocating along the axial direction of the motor, the air gap between the permanent magnet 735 and the stator core 713 can also be effectively shortened, and the magnetic circuit formed in the linear motor 70 is complete, and the magnetic circuit has less magnetic leakage and reduces eddy current. After the loss, the electromagnetic energy utilization rate of the linear motor 70 is high, so that the force component of the linear motor 73 is evenly operated during operation, and the operation is relatively stable, and the effective power and working efficiency of the output of the linear motor 70 in pushing the piston 20 are improved.

Further, each of the coupling brackets 733 is provided with at least one shaft hole extending in the axial direction of the transmission shaft 731. The linear motor 70 further includes a guide rod 737 passing through each shaft hole, and the guide rod 737 The end is fixed to the end cap 30 Then, the mover assembly 73 linearly reciprocates along the guide bar 737. By the arrangement of the guide bars 737, the air gap of the stator assembly and the mover assembly 73 can be further effectively reduced, so that the magnetic flux utilization rate of the linear motor 70 is improved, the efficiency of the linear motor 70 is improved, and the air gap is small. Under the guiding action of the guide rod 737, the running stability is higher during the movement of the linear motor 70 to drive the piston 20.

The linear motor 70 further includes an elastic member 80 that is sleeved at an end of the transmission shaft 731. The elastic member 80 is preferably a spring, and the elastic member may also be a silicone rubber pad. The elastic recovery capability of the elastic member enables the mover assembly 73 to rebound in the opposite direction more rapidly during the linear reciprocating motion. The reliability and sensitivity of the operation of the linear motor 70 are improved, and the working efficiency of the compressor is also improved.

Each of the winding units 71 includes a winding housing 711 connected to the casing 10 and a stator core 713 housed in the winding housing 711. The winding housing 711 is wound externally. There is a winding coil 715.

In this embodiment, the winding housing 711 is made of an insulating material and is connected by two housings. The stator core 713 is received in a cavity formed by the winding housing 711, and the stator core 713 can be made of a plurality of silicon steel sheets. Stamped and laminated. After the end cover 30 is closed to the casing 10, both ends of the winding shell 711 abut against the end cover 30, and the end cover 30 presses the casing into the casing 10 to realize the winding shell 711 in the casing. The fixing within 10 is so easy to disassemble the permanent magnet linear twin-cylinder compressor.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural transformation, or direct/indirect use, of the present invention and the contents of the drawings are used in the inventive concept of the present invention. It is included in the scope of the patent protection of the present invention in other related technical fields.

Claims

A permanent magnet linear two-cylinder compressor, comprising:

a casing, the end of the casing is covered and connected with an end cover;

Two compression cylinders, one of the compression cylinders fixedly coupled to one of the end caps;

a piston, one of the pistons extending into the compression cylinder and linearly sliding within the compression cylinder;

a linear motor housed in the casing, the linear motor including a stator assembly fixedly coupled to the casing, and a mover assembly disposed in the stator assembly;

Two movable links, one end of each of the movable links is hinged to one end of the mover assembly, and the other end is hinged to one end of the piston.
A permanent magnet linear two-cylinder compressor according to claim 1, wherein said mover assembly includes a drive shaft, and both ends of said drive shaft are formed with a first mounting groove, said first mounting groove a first through hole communicating with the first mounting groove is defined in the two opposite slot walls, and a first mounting portion is formed at an end of each of the movable links adjacent to the mover assembly, and the first mounting portion is open a connecting hole, the first mounting portion is snapped into the first mounting slot, and the transmission shaft and the movable link are fastened by a cooperation of a pin with the first through hole and the first connecting hole.
The permanent magnet linear two-cylinder compressor according to claim 2, wherein a second mounting portion is formed at one end of each of the movable links away from the mover assembly, and the second mounting portion is open a second connecting hole, a second mounting slot is formed at one end of the piston adjacent to the movable connecting rod, and two opposite slot walls of the second mounting slot are provided with a second through hole communicating with the second mounting slot, The piston and the movable link are fastened by a pin to the cooperation of the second through hole and the second connecting hole.
The permanent magnet linear two-cylinder compressor according to claim 3, wherein the end faces of the first mounting portion and the second mounting portion are each formed with a rounded curved surface, the first mounting groove and the The bottom wall of the second mounting groove is formed with an abutting curved surface that cooperates with the rounded curved surface.
The permanent magnet linear two-cylinder compressor according to any one of claims 2 to 4, wherein the mover assembly further comprises at least two coupling brackets fixedly coupled to a peripheral wall of the drive shaft, at least Two of the coupling brackets are symmetrically disposed in a radial direction of the transmission shaft, each of the coupling brackets is mounted with at least one permanent magnet, and the stator assembly includes a plurality of annular arrangements arranged in the casing. a winding unit, wherein the coupling bracket extends into a gap between the two winding units.
A permanent magnet linear two-cylinder compressor according to claim 5, wherein each of said coupling brackets is provided with at least one shaft hole, said shaft hole extending in the axial direction of said transmission shaft, said linear motor Also included is a guide rod that passes through each of the shaft holes, an end of the guide rod is fixedly coupled to the end cap, and the mover assembly linearly reciprocates along the guide rod.
The permanent magnet linear two-cylinder compressor according to claim 5, wherein the linear motor further comprises two elastic members respectively sleeved at both ends of the transmission shaft.
A permanent magnet linear two-cylinder compressor according to claim 5, wherein a plurality of said winding units are arranged in at least two layers in the longitudinal direction of said mover assembly.
A permanent magnet linear twin-cylinder compressor according to claim 5, wherein each of said winding units includes a winding housing connected to said casing, and a housing housed in said winding housing A stator core, the winding shell is externally wound with a winding coil.
A permanent magnet linear two-cylinder compressor according to claim 1, wherein each of said end caps is further provided with a valve means having exhaust valves and suctions respectively communicating with said compression cylinders Gas valve.