KR100672283B1 - A scroll compressor having rotation prevention mechanism - Google Patents

Abstract

A scroll compressor having a rotation prevention mechanism is provided to prevent lowering of the compression efficiency of the scroll compressor by reducing abrasion between a fixed scroll and an orbiting scroll. In a scroll compressor having a rotation prevention mechanism, a housing receives a plurality of constitution elements. A driving unit generates a rotation force. An intake unit introduces a fluid from an outside. A spiral scroll wrap performs a compression of the fluid from the intake unit. A fixed scroll(500) is fixed regardless of a driving axis rotation of the driving unit. A scroll compression unit is composed of an orbiting scroll(400) with rotating according to a rotation of the driving axis. A guide ring(100) is installed between the fixed scroll and an intake side housing. A plurality of matching pins is installed with protruding toward a front side on an outer peripheral of the orbiting scroll. And, a plurality of matching grooves is formed on an inside peripheral of the guide ring, wherein the matching pins are received in the matching grooves.

Description

Scroll compressor with anti-rotation mechanism {A SCROLL COMPRESSOR HAVING ROTATION PREVENTION MECHANISM}

1 is a longitudinal cross-sectional view showing an example of a scroll compressor having a conventional anti-rotation mechanism.

FIG. 2 is a plan view illustrating a process of compressing a refrigerant in the scroll compressor of FIG. 1.

3 is a perspective view illustrating the rotation prevention mechanism in FIG. 1.

FIG. 4 is a perspective view showing the structure of the old dam ring in FIG. 3 in detail. FIG.

Fig. 5 is a longitudinal sectional view showing a scroll compressor structure having a rotating prevention mechanism according to the first embodiment of the present invention.

6 is an exploded perspective view of FIG. 5.

7 is a front perspective view and a rear perspective view showing the rotation preventing mechanism in FIG. 6.

8 is an exploded perspective view of FIG. 7.

FIG. 9 is a front perspective view and a rear perspective view showing the configuration of the swing scroll in FIG. 8.

FIG. 10 is a front perspective view and a rear perspective view showing the configuration of the guide ring in FIG. 8. FIG.

FIG. 11 is a rear perspective view illustrating the structure of the fixed scroll in FIG. 8. FIG.

12 is a front view showing a coupling state of the alignment pin and the alignment groove according to the first embodiment of the present invention.

Fig. 13 is a longitudinal sectional view showing the scroll compressor structure having the anti-rotation mechanism according to the second embodiment of the present invention.

14 is an exploded perspective view of FIG. 13.

FIG. 15 is a front view illustrating the internal coupling structure of FIG. 13. FIG.

※ Explanation of Major Drawings

100 ... guide ring

400 ... Turning Scroll

410 ... Spiral wrap of turning scroll

450 ... Alignment groove on a turning scroll

500 ... fixed scroll

510 ... Spiral wrap of fixed scroll

800 ... housing (frame)

900 ... Dowel Pins

The present invention relates to a scroll compressor having a rotation preventing mechanism, and more particularly, a smooth lubricating oil supply to the rotation preventing mechanism, which has less wear, less vibration and noise, better assembly, and less work prevention. A scroll compressor having a mechanism is provided.

BACKGROUND OF THE INVENTION [0002] A scroll compressor is composed of a scroll wrap and is fixed to a fixed scroll regardless of the rotation of the drive shaft, and many types are commercially disclosed as a device for performing compression through the relative motion of the swinging scroll turning in accordance with the rotation of the drive shaft. .

In order to maintain a predetermined compression efficiency, during the orbiting of the swinging scroll, rotation needs to be prevented within an error range, so that the rotation prevention mechanism itself is generally included.

Korean Laid-Open Patent Publication No. 10-2005-0028214 discloses a configuration related to a scroll compressor having a rotation preventing mechanism, which will be described below with reference to FIGS. 1 to 4.

As shown in the drawing, a conventional scroll compressor includes a housing, a driving unit for generating rotational force, a suction unit through which fluid is sucked from the outside, a scroll compressor for compressing fluid sucked from the suction unit, and the scroll compression unit. It is roughly divided into the configuration including the discharge portion for discharging the high pressure fluid compressed by the.

First, the drive unit includes a stator 21 and a drive motor formed of a rotor 22 positioned inside the stator 21, and a drive shaft 20 that is rotated by being inserted over the center of the drive motor.

In addition, the suction part includes a suction pipe 70 formed on one side of the compressor outer circumferential surface, and a suction chamber 71 in communication with the suction pipe 70 and accumulating the introduced refrigerant.

In addition, the scroll compression unit surrounds the outer circumferential surface of the drive shaft 20, a key groove is formed on one side of the upper surface, the upper frame 80, the thrust surface is formed in the central portion, and the key groove formed in the upper frame 80 And a key portion formed thereon, the Oldham ring 30 which performs a linear reciprocating motion on the upper frame 80, and is coupled by a key on the upper side of the Oldham ring 30, and has a spiral scroll wrap. A swing scroll 40 having 41 is formed, and a fixed scroll 50 positioned above the swing scroll 40 and fixed to the upper diaphragm and the outer cell of the compressor.

In addition, the discharge portion is formed in the central portion of the fixed scroll 50, the discharge port 60 for discharging the compressed refrigerant, and the discharge chamber 61 in communication with the discharge port 60, the uppermost of the compressor is formed And a discharge tube 62 formed on one side of the discharge chamber 61. In addition, the orbiting scroll 40 and the fixed scroll 50 of the scroll compression unit are formed with spiral scroll wraps 41 and 51, and the interaction between the orbiting scroll wrap 41 and the fixed scroll wrap 51 is achieved. The refrigerant is thereby compressed.

In particular, the old dam ring 30 is interposed between the swinging scroll 40 and the upper frame 80 to interlock to induce the swinging movement of the swinging scroll 40.

Meanwhile, in the discharge unit, the discharge port 60 is fixed to the discharge port 60 between the discharge port 60 and the discharge chamber 61 to prevent the reverse flow of the refrigerant discharged through the discharge port 60. The check valve 63 and the check valve housing 64 may be formed.

With reference to the above-described configuration, the operation of the conventional scroll compressor will be described.

First, when a drive motor composed of the stator 21 and the rotor 22 is operated, the drive shaft 20 coupled with the rotor 22 of the drive motor rotates. As the drive shaft 20 rotates, the refrigerant is sucked through the suction pipe, and the refrigerant in the low pressure state introduced into the compressor through the suction pipe 70 passes into the suction chamber 71 in communication with the suction pipe 70. After entering, it enters the scroll compressor.

The refrigerant introduced into the scroll compression unit is compressed to high pressure by the swinging movement of the swing scroll 40, and the compressed refrigerant is collected at the center of the scroll. The collected high pressure refrigerant is discharged to the discharge chamber 61 through the discharge port 60. At this time, the check valve 63 and the check valve housing 64 are formed so that the high-pressure refrigerant entering the discharge chamber does not flow back to the scroll compression unit, thereby preventing the back flow.

Finally, the refrigerant accumulated in the discharge chamber 61 is discharged to the outside of the compressor through the discharge tube 62.

2 illustrates a process of compressing a refrigerant in a scroll compression unit according to the spirit of the present invention.

First, as the driving shaft 20 rotates, the turning scroll 40 is eccentric about the driving shaft 20 to rotate (or idle). Then, as the orbiting scroll 40 is pivoted by the rotation of the drive shaft 20 with respect to the fixed scroll 50, pockets 99 are formed in which the respective wrap 41 and 51 are in surface contact with each other to compress the refrigerant. do.

In addition, the formed pocket 99 is reduced in volume as it returns to the center of the scroll wrap, and a high pressure is formed as the volume is reduced, and the formed high-pressure fluid is discharged through the discharge port 60 in the center of the scroll member. Move to chamber 61.

However, as in the conventional scroll compressor, when the Oldham ring is used, there is always a concern about wear because friction between the key and the groove is inevitable.

In addition, as the wear progresses, there is a problem that the compression efficiency of the refrigerant gradually decreases, and vibration and noise become severe.

The present invention has been made to solve the above problems, the object of the invention is to provide a smooth lubricating oil supply to the anti-rotation mechanism is less wear and vibration and noise is reduced, excellent assembling can reduce the number of assembly work It is to provide a scroll compressor having a rotation preventing mechanism.

In order to achieve the above object, the scroll compressor having a rotation preventing mechanism according to the present invention,

A housing for accommodating the component parts; A driving unit for generating rotational force; A suction part through which fluid is sucked from the outside; Composed of a spiral scroll wrap for compressing the fluid sucked from the suction unit, and a fixed scroll fixed regardless of the rotation of the drive shaft of the drive unit, and a rotating scroll that rotates in accordance with the rotation of the drive shaft and forms a spiral scroll wrap A scroll compression unit; In the scroll compressor composed of a discharge unit for discharging the high-pressure fluid compressed by the scroll compression unit,

A guide ring is installed between the fixed scroll and the suction side housing.

A plurality of dowel pins are installed to protrude forward in the outer circumference of the turning scroll,

The inner circumference of the guide ring is characterized in that the alignment groove is formed to accommodate the alignment pin.

Here, the dowel pin is preferably formed in the dowel pin installation portion projecting in the radial direction from the outer circumference of the revolving scroll.

In addition, the housing is composed of a front housing and the rear housing which is the suction side, the main frame for supporting the drive shaft is installed inside the housing, the guide ring is preferably disposed between the fixed scroll and the main frame. Do.

The fixed scroll and the guide ring may be formed of the same or different materials, and in the case of the equivalent material, may be integrally formed.

In addition, when viewed in the axial direction, the fitting groove is preferably formed in an arc shape.

In addition, the dowel pin and dowel groove is preferably disposed on the fluid suction passage.

In addition, the alignment groove is preferably formed by heat treatment and surface treatment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Example 1

5 to 12 show a configuration example of a scroll compressor having a rotation preventing mechanism according to Embodiment 1 of the present invention.

As shown, the scroll compressor according to the present invention, the housing (or frame) 800, the drive unit for generating a rotational force, the suction unit in which fluid is sucked from the outside, the fluid sucked from the suction unit is compressed And a discharge unit through which the high pressure fluid compressed by the scroll compression unit is discharged. Reference numeral G is a gasket.

The housing 800 is composed of a front housing 810 and a rear housing 820, the inside of the housing 800, the main frame for supporting the anti-rotation mechanism and drive shaft 200, which will be described later in the inside ( 860 is provided separately. An oil separator 880 is formed in the front housing 810.

Here, the housing 800 is not an essential part of the present invention and may have a form and structure different from the illustrated structure.

First, the drive unit is a drive motor 230 formed of a stator 210 and a rotor 220 positioned inside the stator 210, and a drive shaft 200 that is inserted and rotated on the center of the drive motor 230. ) Is included.

In addition, a main bearing 240 and a sub bearing 250 are installed on the drive shaft 200 driven by the drive motor 230, and the sub bearing 250 is eccentric with respect to the drive shaft 200. Supports the circumference of the installed eccentric action unit 260.

In addition, the scroll compression unit is composed of a fixed scroll 500 and the revolving scroll 400, the fixed scroll 500 is fixed to the housing 800, the scroll wrap 510 is formed, the revolving The scroll 400 is combined with the fixed scroll 500 and is also formed of a spiral scroll wrap 410.

In addition, the eccentric action portion 260 installed on the drive shaft 200 is connected to the swinging scroll 400 via the sub-bearing 250.

Accordingly, as the drive shaft 200 rotates, the eccentric action unit 260 rotates eccentrically with respect to the drive shaft 200, and eventually, the orbiting scroll (3) installed on the eccentric action unit 260 via the sub bearing 250. 400 is pivoted relative to the fixed scroll 500.

As described above, pockets are formed between the scroll wraps 410 and 510 according to the turning motion of the turning scroll 400, and the refrigerant is compressed while the volume thereof is continuously changed.

On the other hand, the suction unit includes a suction tube (not shown) formed on one side of the compressor outer circumferential surface, and a suction chamber 710 communicating with the suction tube and accumulating the introduced refrigerant.

The discharge unit may include a discharge port 600 formed at the center of the fixed scroll 500 to discharge the compressed refrigerant, and a discharge chamber 610 communicated with the discharge port 600 and formed at an end of the compressor. It is.

A check valve 630 is also provided to prevent backflow of the refrigerant discharged through the discharge port 600.

A thrust plate 870 supporting the pivoting movement of the pivoting scroll 400 is interposed between the pivoting scroll 400 and the support of the housing 800.

The anti-rotation mechanism according to the present invention is formed at the rear of the fixed scroll 500, and the configuration thereof will be described in more detail in the following embodiments. In various embodiments, like reference numerals designate like elements, and redundant descriptions will be omitted.

As shown in FIGS. 7 to 11, a spiral scroll wrap 510 is formed on the fixed scroll 500, and a spiral scroll wrap 410 is also formed on the swing scroll 400 coupled to the fixed scroll 500. Is formed, and the anti-rotation mechanism is formed in the scroll compression unit that has a function of compressing the sucked fluid (refrigerant) as the turning scroll 400 rotates.

In addition, the anti-rotation mechanism according to the present embodiment, the guide ring 100 is first installed on the suction side of the fixed scroll 500, the circumference of the swinging scroll 400, a plurality of dowel pins ( 900 is provided to protrude forward. In particular, the dowel pin 900 is installed toward the guide ring 100.

Specifically, as shown in FIG. 9, the orbiting scroll 400 has alignment pin installation portions 490 protruding in a radial direction from the outer circumference at regular intervals along the circumferential direction, and the alignment pin installation portions. An alignment pin 900 is formed forward at the side at which the scroll wrap 410 is located.

The dowel pin 900 is preferably formed integrally with the orbiting scroll 400 by casting and forging, but may be installed on the dowel pin installation portion 490 by welding or the like.

In addition, as illustrated in FIG. 10, the guide ring 100 is disposed between the fixed scroll 500 and the main frame 860 to prevent rotation of the swing scroll 400.

To this end, the inner circumference of the guide ring 100 has a fitting groove 150 is accommodated in the alignment pin 900 is formed along the inner circumference. In the drawing, the fitting groove 150 is most preferably made of an arc shape, but if it is a smooth curved groove, it is effective and does not need to be particularly limited.

In addition, the guide ring 100 is formed with a plurality of fastening holes 190 in the circumferential direction thereof for coupling with the housing 800.

The outer circumference of the guide ring 100 is circular, but the shape of the guide ring 100 is not particularly limited.

In addition, in the drawings, the guide ring 100 is a separate component, but may be formed integrally with the fixed scroll 500.

The dowel pin 900 of the orbiting scroll 400 and the dowel groove 150 of the guide ring 100 are formed at regular intervals along the circumferential direction, which is preferable for uniform distribution of load during operation.

As shown in FIG. 11, on the side where the scroll wrap 510 is formed in the fixed scroll 500, an installation piece 570 is formed in an outer circumference of the scroll wrap 510 in a driving shaft direction.

In addition, an O-ring 830 is disposed at the bottom of the fixed scroll 500 facing the bottom of the housing 800 to prevent leakage of the refrigerant.

As shown in FIG. 5, the fixed scroll 500, the guide ring 100, and the main frame 860 are closely coupled at the outer circumferential portion with the pivoting scroll 400 accommodated therein. .

In addition, the height of the mounting piece 570 is formed to be somewhat smaller than the width of the scroll wrap 510 when engaged. However, the relative large and small relations can be adjusted, and need not be limited.

On the other hand, in order to increase wear resistance, the alignment pin 900 and the alignment groove 150 may be a general heat treatment and surface treatment.

As shown in Figures 5 and 6, the anti-rotation mechanism is disposed between the front housing 810 and the rear housing 820, the fixed scroll 500 is seated toward the front housing 810, pivoting scroll ( 400 is installed in the rear housing 820 via the main frame 860. The guide ring 100 is disposed between the fixed scroll 500 and the main frame 860 and is coupled to the front housing 810 and the rear housing 820 by fastening means 700 such as a bolt.

In addition, the circumferential portion of the guide ring 100 is fixedly coupled between the front housing 810 and the rear housing 820.

As shown in FIG. 6, the fixed scroll 500, the guide ring 100, and the main frame 860 are closely coupled to each other, and an alignment pin 900 of the pivoting scroll 400 is connected to the guide ring. By being accommodated in the alignment groove 150 of the 100, the rotation of the turning scroll 400 to prevent rotation.

In this case, since the alignment groove 150 is larger than the alignment pin 900, there may be a slight play of the alignment pin 900 in the alignment groove 150 when turning.

12 illustrates a coupling structure of the turning scroll 400 and the guide ring 100 when turning. Here, M is the moment, L is the length from the center of the drive shaft to the dowel pin 900, F is the contact load between the dowel pin and the dowel 150, μ is the coefficient of friction.

As shown in the figure, since the dowel pin 900 is far from the center O, the contact load F is small with respect to the acting moment M, thereby causing abrasion between the dowel pin and the dowel groove. Will be reduced.

On the other hand, as shown, since the portion having the anti-rotation structure is the circumferential portion of the scroll on the suction passage of the refrigerant, the lubricating oil can be easily supplied.

Example 2

13 to 15 show a configuration example of a scroll compressor having a rotation preventing mechanism according to Embodiment 2 of the present invention.

In the drawings, duplicate descriptions of the same parts as in Embodiment 1 will be omitted, and only the differences will be described.

As shown, the anti-rotation mechanism according to the present embodiment, the guide ring 100 is provided along the periphery of the suction side of the fixed scroll 500, a plurality of fittings around the pivoting scroll 400 The pin 900 protrudes forward. In particular, the dowel pin 900 is installed toward the guide ring 100.

In addition, the guide ring 100 is installed between the fixed scroll 500 and the main frame 860.

However, unlike Embodiment 1, the guide ring 100 is accommodated inside the front housing 810.

Accordingly, the front housing 810 and the rear housing 820 is configured to be in direct contact coupling, the gasket (G) is interposed therebetween. That is, unlike Example 1, only one gasket may be used.

According to the present invention having the configuration as described above, since the rotation is prevented by the combination of the alignment pin and the alignment groove between the fixed scroll and the swinging scroll, the lubrication is sufficiently made by the suction gas, the noise due to wear compared to the conventional There is an advantage that the vibration and vibration are significantly reduced.

In addition, according to the present invention, the wear phenomenon is reduced due to the reduced contact load, and thus the compression efficiency of the compressor can be avoided.

In addition, according to the present invention, it is excellent to assemble because it is necessary to form a dowel pin on the circumferential portion of the swinging scroll and fit the dowel groove of the guide ring.

In addition, according to the present invention, since the assembly work is completed by one fastening operation between the front housing and the rear housing, the number of parts and the number of work is greatly reduced.

In addition, according to the present invention, since the dowel pin is formed around the outer shell, it is possible to secure a large area of the back pressure chamber.

Further, according to the present invention, since the anti-rotation mechanism is formed around the swing scroll located on the suction passage, the lubricity is excellent.

In addition, according to the present invention, since the heat treatment and the surface treatment is formed in the custom groove can be more effectively prevent wear.

Claims (7)

A housing for accommodating the component parts; A driving unit for generating rotational force; A suction part through which fluid is sucked from the outside; Composed of a spiral scroll wrap for compressing the fluid sucked from the suction portion and fixed fixed regardless of the rotation of the drive shaft of the drive unit, and a rotating scroll that rotates in accordance with the rotation of the drive shaft and forms a spiral scroll wrap A scroll compression unit; In the scroll compressor composed of a discharge unit for discharging the high-pressure fluid compressed by the scroll compression unit, A guide ring is installed between the fixed scroll and the suction side housing. A plurality of dowel pins are installed to protrude forward in the outer circumference of the turning scroll, The inner side of the guide ring is a scroll compressor having a rotation preventing mechanism characterized in that the groove is formed to accommodate the alignment pin. The method of claim 1, The dowel pin is a scroll compressor having a rotating prevention mechanism, characterized in that formed on the dowel pin mounting portion projecting radially from the outer circumference of the swinging scroll. The method according to claim 1 or 2, The housing is composed of a front housing and a rear housing which is the suction side, the main frame for supporting the drive shaft is installed inside the housing, the guide ring is characterized in that disposed between the fixed scroll and the main frame Scroll compressor having a rotation preventing mechanism. The method of claim 3, The fixed scroll and the guide ring is formed of the same or different materials, if the same material is a scroll compressor having a rotation preventing mechanism, characterized in that formed integrally. The method of claim 3, When viewed from the axial direction, the fitting groove is a scroll compressor having a rotation preventing mechanism, characterized in that formed in an arc shape. The method of claim 3, The dowel pin and the dome groove is a scroll compressor having a rotating prevention mechanism, characterized in that disposed on the fluid suction passage. The method of claim 3, The fitting groove scroll compressor having a rotation preventing mechanism characterized in that the heat treatment and the surface treatment is formed.

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