CN100476203C - Reciprocating compressor - Google Patents

Abstract

A reciprocating compressor includes a driving unit (16) having an outer stator (26) and an inner stator disposed at a predetermined air gap there between, and a moving member positioned between the outer stator (26) and the inner stator (28) and linearly and reciprocally moved; a compression unit (18) having a cylinder (38) fixed at an inner circumferential surface of the inner stator (28) and a piston (22) linearly moved in the cylinder (38) by being connected to the moving member; a support portion (20) supporting the compression unit (18) and the driving unit (16); and a resonant spring unit positioned (24) at a rear portion of the driving unit (16), disposed at the support portion (20), and inducing a resonant movement of the piston (22). Therefore, a resonant spring (62,64) of the compressor can be moved horizontally and straight forwardly by reducing a torsion moment of the resonant spring (62,64), a width of the compressor can be reduced, and a concentricity of a driving unit (16) and a compression unit can be maintained.

Description

Reciprocating compressor

technical field

The invention relates to a reciprocating compressor, and more particularly to a reciprocating engine of compact size and improved performance.

Background technique

FIG. 1 is a sectional view showing a reciprocating compressor according to one example of the conventional art.

A traditional reciprocating compressor includes a closed casing, a suction pipe 102 and a discharge pipe 104 are respectively connected to the casing; a drive unit 108 is arranged in the casing 105 and generates reciprocating force a compression unit 110 that is transmitted to the reciprocating force generated by the drive unit 108 and compresses the fluid; a support portion 112 that supports the drive unit 108 and the compression unit 110 .

The drive unit 108 includes an outer stator 116 fixed on the support portion 112 and having a powered winding coil 114; an inner stator 118 disposed on the inner peripheral surface of the outer stator 116 with a predetermined air gap; a magnet 120, which is placed in the air gap between the outer stator 116 and the inner stator 118, and moves linearly reciprocatingly when the winding coil 114 is energized; The same spacer is mounted on the magnet 120 and transmits the linear movement of the magnet 120 to the piston 124 by being connected with the piston 124 of the compression unit 110 .

The compression unit 110 includes a piston 124 linearly reciprocating by being connected with the moving member 122; a cylinder 130 in which the piston 124 is slidably inserted and having a compression chamber; A suction valve 132 for fluid return; a discharge valve assembly 134 positioned at the front of the cylinder 130 for on and off action to discharge fluid.

The support unit 112 includes a first frame 140 on which the inner stator 118 is fixed, the first frame is assembled on the outer circumferential surface of the cylinder 130 and supports a side surface of the outer stator 116; A second frame 142 on the other side surface of 116; a third frame 144 connected with the second frame and equipped with a resonant spring unit 146.

The resonant spring unit 146 that causes the piston 124 to perform a resonant motion includes a first resonant spring 148 that is disposed between the first frame and the side surface of the connecting portion 152 between the moving member 122 and the piston 124, when the piston 124 moves backward. , the first resonant spring provides elastic force to the piston 124; a second resonant spring 150 arranged between the other side surface of the connecting portion 152 and the third frame 144, the second resonant spring 150 moves forward when the piston 124 At the same time, an elastic force is provided to the piston 124 to compress the fluid.

Here, the first resonant spring 148 and the second resonant spring 150 are composed of compression coil springs. The first resonance spring 148 has a larger diameter than the cylinder 130 and is located on the outer circumferential surface of the cylinder 130 , and the second resonance spring 150 is located at the rear of the compression unit 110 .

In a conventional reciprocating compressor, when power is supplied to the winding coil 114, magnetic flux is generated between the outer stator 115 and the inner stator, and thus, the magnet 120 and the moving member 122 linearly reciprocate. As the piston 124 coupled to the moving member 122 reciprocates linearly within the cylinder 130, the fluid is compressed.

At this time, when the piston 124 moves forward to compress the fluid, the elastic force of the second resonant spring 150 is provided to the piston 124 ; when it moves backward, the elastic force of the first resonant spring 148 is provided to the piston 124 .

However, in the conventional reciprocating compressor, the first resonance spring 148 is disposed in a space between the outer circumferential surface of the cylinder 130 and the inner circumferential surface of the inner stator 118 . Therefore, the width of the compressor should be larger because a predetermined space should be obtained for disposing the first resonance spring 148 between the outer circumferential surface of the cylinder 130 and the inner stator 118 .

Also, since the first and second springs 148 and 150 are composed of compression coil springs capable of generating torque, and are arranged on both sides of the connection unit 152 between the moving member 122 and the piston, respectively, when the first and second springs When the 148 and 150 repeatedly compress and extend, torque is created. For this reason, it is difficult for the piston 124 to maintain its linear motion, and thus the performance of the motor deteriorates.

FIG. 2 is a sectional view showing a reciprocating compressor according to another example of the conventional art for solving these problems.

In the reciprocating engine shown in FIG. 2, the compression unit 110 is arranged at the front of the housing 106 and is fixed on the first frame 162, while the drive unit 108 is arranged at the rear of the housing 106 and is fixed on the second and second frames 162. Three frames 164 and 166 are on. The moving member 122 and the piston 124 of the driving unit 108 are mechanically connected, and the spring supporting member is disposed at the connecting portion of the moving member 122 and the piston 124 .

Also, a plurality of first resonant springs 172 are disposed between the first frame frame 162 and the front surface of the spring support member 176 at predetermined intervals in the circumferential direction. A plurality of second resonant springs 174 are disposed between the rear surface of the spring support member 176 and the second frame at predetermined intervals in the circumferential direction.

In this reciprocating compressor, since the drive unit 108 and the compression unit 110 are disposed at the front and rear of the housing 106, respectively, and the first resonant spring 172 and the second resonant spring 174 are disposed at the outer circumferential portion of the compression unit 110 , so the width of the compressor 110 can be reduced. Also, since the plurality of first and second resonant springs 172 and 174 are disposed in the circumferential direction, torque caused by repeated compression and expansion of the springs can be reduced.

However, in the reciprocating compressor according to this conventional art, the driving unit 108 generating a reciprocating moving force and the compressing unit 110 receiving the moving force from the driving unit 108 are disposed at a predetermined interval at the front and rear of the compressor. Therefore, it is difficult to adjust the concentricity of the driving unit 109 and the compression unit 110, and thus causes a reduction in assembly quality.

That is, although the concentricity of the inner and outer stators 116 and 118 of the driving unit 108 has been adjusted, the concentricity of the piston 124 of the driving unit 108 and the compression unit 110 must be readjusted, thus causing difficulty in assembly.

In addition, since the driving unit 108 and the compressing unit 110 are arranged at the front and rear of the housing 106, respectively, even if the concentricity of the moving member 122 is slightly shifted during the operation of the compressor, the concentricity of the piston 124 will be seriously disturbed. Deviate. This causes a collision of the cylinder 130 and the piston 124, and thus, the performance of the compressor deteriorates.

Contents of the invention

Therefore, an object of the present invention is to provide a compound compressor capable of moving the resonance spring forward horizontally and linearly, reducing the width of the compressor, and maintaining the concentricity of the driving unit and the compression unit by reducing the torque of the resonance spring.

In order to achieve the above object, a reciprocating compressor is provided, comprising a drive unit, the drive unit has an outer stator and an inner stator arranged with a predetermined space gap therebetween; a reciprocating moving member; a cylinder fixed on the inner circumferential surface of the inner stator; a compression unit connected to the moving member and linearly reciprocating in the cylinder; a support unit supporting the compression unit and the drive unit; A resonant spring located at the rear of the drive unit rests on the support and induces a resonant motion of the piston.

The cylinder is fixed on the inner circumferential surface of the inner stator by a press fit method.

The support unit includes a first frame, the first frame supports the outer circumferential surface of the cylinder, one side surface of the outer stator and one side surface of the inner stator; the second frame supports the other side surface of the outer stator; and the second The frame is connected to and houses the third frame of the resonant spring unit.

The resonant spring unit includes a spring support member assembled at the position where the piston and the moving member are connected; a plurality of first resonant springs arranged between the second frame and a side surface of the spring support member; a plurality of first resonant springs arranged on the third frame and the second resonant spring between the other side surface of the spring support member. The plurality of first and second resonant springs are arranged in a circumferential direction, and their winding directions are arranged opposite to each other.

The spring support member includes a connection part connected to the part where the moving member is connected to the piston and arranged at the rear of the piston; a first support part on which the first resonant spring is supported On the part, the first supporting part extends from the edge of the connecting part at a predetermined interval in the circumferential direction; a second supporting part, the second resonant spring is supported on the second supporting part, and the first supporting part The two supporting parts are arranged between the first supporting parts.

Description of drawings

FIG. 1 is a sectional view showing a reciprocating compressor according to one example of the conventional art.

FIG. 2 is a sectional view showing a reciprocating compressor according to another example of the conventional art.

Fig. 3 is a sectional view showing a reciprocating compressor according to one embodiment of the present invention.

Fig. 4 is a sectional view showing a state in which an inner stator and an oil cylinder of a reciprocating compressor are connected according to the present invention.

FIG. 5 is a sectional view taken along line V-V in FIG. 4 .

FIG. 6 is a perspective view showing a resonant spring unit of the reciprocating compressor of the present invention.

Fig. 7 is a side view showing the arrangement state of the resonant spring of the reciprocating compressor of the present invention.

8 and 9 are partial sectional views showing a fixed state of the resonant spring of the present invention.

10 and 11 are front views showing the winding direction of the resonant spring of the reciprocating compressor of the present invention.

Detailed ways

A first embodiment of the present invention will now be described with reference to the accompanying drawings.

The reciprocating compressor of the present invention is capable of many embodiments, a preferred embodiment will now be described.

Fig. 3 is a sectional view of a reciprocating compressor according to the present invention.

The reciprocating compressor of the present invention comprises a housing 14, the suction pipe 10 and the discharge pipe 12 are respectively connected on the housing 14; a driving unit 16 which is arranged in the housing 14 and generates reciprocating power; A compression unit 18 that compresses the fluid by the reciprocating force of the transmitted drive unit 16; a support unit 20 that supports the drive unit 16 and the compression unit 18; a piston 22 that is installed on the support unit 20 and passes to the compression unit 18 A resonant spring assembly 24 is provided which springs force causing a resonant motion of the piston 22 .

The driving unit 16 includes an outer stator 26 fixed on the support portion 20; an inner stator 28, and a predetermined air gap is formed between the inner stator 28 and the inner peripheral surface of the outer stator 26; a winding coil 30 supplied with electric power, set On one of the outer stator 26 and the inner stator 28; a magnet 32 disposed in the air gap between the outer stator 26 and the inner stator 28, and having linear and reciprocating motion when power is supplied to the coil 30; a moving member 34 , the magnets 32 are fixed on the moving member 34 at the same circumferential interval, and the moving member 34 transmits the linear motion of the magnet to the piston 22 by being connected with the piston 22 of the compression unit 18 .

The compression unit 18 comprises a cylinder 38 fixed on the inner circumference of the inner stator 28 and having a compression chamber 36 in which the fluid is compressed; a piston 22 which is linearly movable is inserted into the cylinder 38, and is connected with the moving member 34, and the piston moves linearly when the moving member 34 moves linearly, thereby compressing the fluid in the compression chamber; A suction valve 40 for the fluid return of the compression chamber; a discharge valve assembly 42 arranged at the front of the cylinder 38 to complete the opening and closing action of the discharged fluid.

Here, as shown in FIGS. 4 and 5 , the cylinder 38 is fixed on the inner peripheral surface of the inner stator 28 by press-fitting or the like. That is, since the cylinders are directly fixed on the inner peripheral surface of the inner stator 28 without any gap therebetween, the width of the compressor can be reduced.

The supporting unit 20 includes a first frame 46 fitted on the outer circumference of the cylinder 38 and supporting one side surface of the outer stator 26; a second frame 48 supporting the other side surface of the outer stator 26; The third frame 50 of the resonant spring unit 24 is connected and installed.

On the first frame 46, the outer peripheral surface of the cylinder 38 is supported on the inner peripheral surface of the first frame 46 by press fit or the like; one side surface of the inner stator 28 is supported on the inner side frame surface of the first frame; and One side surface of the outer stator 26 is supported on the outer side surface of the first frame.

On the second frame 48 , the other surface side of the outer stator 26 is supported on one side surface of the second frame 48 . The third frame 50 is fixed on the outer surface of the second frame, and the outer surface of the second frame supports the springs of the resonant spring unit 24 .

In the cylindrical third frame 50 , one end thereof is fixed to the second frame 48 and extends toward the rear of the casing 14 by a certain length. At the other end of the third frame 50 is formed a fluid passage through which the fluid entering the inlet 10 flows, and the spring of the resonant spring unit 24 is supported on the inner surface thereof.

As shown in Figure 6, the resonant spring unit 24 includes a spring support member 60 assembled at the position where the piston 22 and the moving member 34 are connected; it is arranged between the second frame 48 and a side surface of the spring support member 60, when the piston The first resonant spring 62 that provides elastic force to the piston 22 when moving backward; The second resonant spring 64 provides elastic force.

Here, the spring supporting member 60 includes a connecting portion 66, which is located at the rear of the piston 22 and fixed at the position where the moving member 34 and the piston 22 are connected; A predetermined interval protrudes from the edge of the connecting portion 66 and supports the first resonance spring 62 ; a second support portion 70 is provided between the first support portions 68 and supports the second resonance spring 64 .

The disk-shaped connecting part 66 has a passage 72 for fluid passage in its central part. The first supporting portion 68 extends rearward for a certain distance from the edge of the connecting portion 66 , and is bent outward at its end to seat the first resonant spring 62 . A plurality of first support portions 68 are formed at predetermined intervals along the circumferential direction of the connection portion 66 .

The second support portions 70 are respectively disposed between the first support portions 68 and protrude radially from the edges of the connection portion 66 to support the second resonant spring 64 .

As for the first resonant spring 62, its two end portions are supported on the second frame 48 and the first support portion 68 of the spring support member 60, respectively. As for the second resonant spring 64 , both end portions thereof are supported on the third frame 50 and the second support portion 70 of the spring support member 60 , respectively. As shown in FIG. 7, due to the above structure, the first resonant spring 62 and the second resonant spring 64 have an overlapping portion (L) when viewing the compressor from the side. Since the first resonant spring 62 and the second resonant spring 64 have an overlapping portion (L) in the axial direction of the compressor, the axial length of the compressor is reduced.

In a different example of the spring support member 60, by bendingly forming the second support portion, the overlapping portion of the first resonance spring 62 and the second resonance spring 64 can be extended more.

As shown in FIG. 8, spring stand portions 80 supporting the first and second resonant springs are formed on side surfaces of the first and second support portions 68 and 70, respectively. A cylindrical spring stand portion 80 protrudes from side surfaces of the first and second support portions 68 and 70, and supports the first and second resonant springs 62 and 64, respectively.

FIG. 9 shows a special spring stud member 82 mounted on the first and second support portions 68 and 70 to support the first and second resonant springs 62 and 64 . The spring pile member 82 includes a fixing portion 84 inserted and fixed in a through hole 88 formed on each of the first and second support portions by press fit or other similar methods; Portion 84 extends out and supports stud portion 86 of first and second resonant springs 62 and 64 .

The first and second resonant springs 62 and 64 are respectively formed of compression coil springs, and cancel each other's torque by having opposite winding directions. As shown in FIG. 10 , that is, if the first resonant spring supported on the first support portion 68 is wound counterclockwise as shown by arrow P, the second resonant spring 64 adjacent to the first resonant spring 62 will Wind clockwise as indicated by arrow Q.

As shown in FIG. 11 , the winding directions of the first resonance springs 62 disposed facing each other are different from each other, and the winding directions of the second resonance springs 64 disposed facing each other are also different from each other. That is, if one first resonant spring 62 is wound in the arrow S direction, the other adjacent first resonant spring 62 is wound in the arrow T direction. Likewise, if one second resonant spring 64 is wound in the direction of arrow T, the other adjacent second resonant spring 64 is wound in the direction of arrow S. FIG.

The operation and effect of the reciprocating compressor will now be described.

When power is supplied to the winding coil 30 , a magnetic flux is formed between the outer stator 26 and the inner stator 28 . Through the magnetic flux, the moving member 34 performs linear and reciprocating motions, and thus, the piston 22 connected to the moving member 34 compresses and discharges the fluid introduced into the compression chamber while linearly reciprocating in the cylinder 34 .

At this time, when the piston 22 moves forward to compress the fluid, the elastic force of the second resonant spring 62 is provided to the piston 22 ; and when the piston 22 moves backward, the elastic force of the first resonant spring 64 is provided to the piston 22 .

In the reciprocating compressor of the present invention, since the cylinder is directly fixed on the inner peripheral surface of the inner stator by press fitting or the like, the width of the compressor can be reduced.

By placing the piston on the moving member, the longitudinal spacing between the moving member and the piston can be minimized, whereby the concentricity of the moving member and the piston can be easily adjusted during assembly, and wear and movement of the piston and cylinder can be prevented Collision of components with outer/inner stator.

The axial length of the compressor can be reduced by providing the first and second resonant springs such that they overlap at a certain portion.

Also, a plurality of first and second resonant springs are arranged in a circumferential direction, and winding directions of the first and second resonant springs are arranged to be opposite to each other. Therefore, since the torque that may be generated when each resonance spring is compressed and expanded is prevented, torsion of the piston and wear of parts in contact with the resonance springs are reduced, and thus the reliability of the compressor is improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Therefore, it is contemplated that the content of the present invention covers the modifications and variations of the present invention if they are within the scope of the appended claims and equivalent claims.

Claims (14)

1. reciprocal compressor comprises:

Driver element, described driver element have external stator and the inner stator that is provided with predetermined air clearance therebetween; And be arranged between described external stator and the inner stator and the linear mobile member that moves back and forth;

Compression unit, described compression unit has the cylinder on the inner peripheral surface that is fixed on inner stator, with the piston that is connected with described mobile member and moves in described cylinder internal linear;

Support the support unit of compression unit and driver element; And

Be arranged on the driver element rear portion, be installed on the support unit and cause the resonant springs unit of the harmonic moving of piston,

Wherein, described support unit comprises:

Support first framework of a side surface of side surface of the outer surface of described cylinder, described external stator and described inner stator;

Support second framework of another side surface of described external stator; And

The 3rd framework that is connected and installs described resonant springs unit with second framework,

Wherein, described resonant springs unit comprises:

Be installed in the spring supporting member at piston and mobile member connection part place;

Be arranged on a plurality of first resonant springs between side surface of second framework and spring supporting member; And

Be arranged on a plurality of second resonant springs between another side surface of the 3rd framework and spring supporting member,

Wherein, described a plurality of first and second resonant springs are arranged on circumferencial direction, and their coiling direction is set to opposite each other.

2. as claim 1 described compressor, wherein, described cylinder is fixed on the inner peripheral surface of inner stator by press fit;

3. as compressor as described in the claim 1; Wherein, in described first framework, the outer circumferential face of described cylinder is fixed on by press fit on the inner peripheral surface of first framework, and a side surface of described inner stator is supported on the inner surface of first framework, and a side surface of external stator is supported on the outer surface of first framework;

4. as claim 1 described compressor, wherein, described each first resonant springs edge is circumferentially with arranged at predetermined intervals, and each second resonant springs is arranged between first resonant springs;

5. as claim 1 described compressor, wherein, described first resonant springs and second resonant springs are arranged to axially overlapping with predetermined part along compressor;

6. as claim 1 described compressor, wherein, described first and second resonant springs are arranged to be parallel to the axial of compressor;

7. compressor as claimed in claim 1, wherein, described first and second resonant springs are made of compression helical spring, and first and second resonant springs are installed in and make the end of spring, the center of spring and the central row of piston be listed on the straight line on the spring supporting member;

8. as claim 1 described compressor, wherein, described spring supporting member comprises:

Be connected with the connection part of mobile member and piston and be positioned at the joint at piston rear portion;

Along first supporting portion of circumferentially stretching out and support first resonant springs from the edge of joint with predetermined interval; And

Be arranged between first supporting portion and support second supporting portion of second resonant springs.

9. as claim 8 described compressors, wherein, the described plate-like joint heart therein partly has a passage that supplies fluid to pass through, and is fixed on the connection part place of piston and mobile member.

10. as claim 8 described compressors, wherein, described first supporting portion extends back from the edge bending of joint, and so shaping makes its end be folded to the outside of joint to support first resonant springs.

11. as claim 8 described compressors, wherein, described second supporting portion extends radially out with predetermined interval from the edge of joint.

12. as claim 8 described compressors, wherein, described first supporting portion and second supporting portion circumferentially alternately form along joint.

13. as claim 8 described compressors, wherein, the described spring stake portion that is used for fixing first and second resonant springs is formed on respectively on first and second supporting portions;

14. compressor as claimed in claim 13, wherein, described spring stake portion form respectively from the respective side of first and second supporting portions stretch out cylindrical, and spring stake portion is formed with a hole respectively thereon.

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