KR200394767Y1 - Rotation prevention device of scroll compress - Google Patents

Abstract

The present invention relates to an anti-rotation device of a scroll compressor, and by restraining the axial behavior of the anti-rotation device, it is possible to reduce the overturning moment applied to the turning scroll as well as to improve the stability and efficiency of the compressor. The present invention relates to a rotation preventing device of a scroll compressor capable of reducing friction and noise caused by local friction force concentration. To this end, the present invention, the casing to form a sealed receiving space therein, the frame is fixed to the inside of the casing, the fixed scroll is fixed to the frame provided with an involute-shaped wrap, the involute shape A scroll compressor including a rotating scroll coupled to the frame and the fixed scroll so as to form a pair of two compression chambers that are engaged with the fixed scroll and continuously move, the scroll scroll comprising: An all key including an upper key and a lower key which are disposed between the frame and the upper and lower key grooves protruding from the upper and lower surfaces of the body and respectively accommodated in the upper and lower key grooves formed on the bottom and the upper surface of the frame. Daming; And a tilting restraining means for restraining the axial behavior of the old dam ring so that the tilting of the old dam ring is constrained.

Description

ROTATION PREVENTION DEVICE OF SCROLL COMPRESS}

The present invention relates to an anti-rotation device of a scroll compressor, and more particularly, it is possible to reduce the overturning moment applied to the turning scroll and to improve the stability and efficiency of the compressor. It relates to a rotating compressor of a scroll compressor that can reduce noise.

Generally, a compressor is a device that compresses a fluid such as refrigerant gas, and the compressor is classified into a rotary compressor, a reciprocating compressor, a scroll compressor, and the like according to a method of compressing the fluid.

The scroll compressor is a high-efficiency low noise compressor widely applied to the air conditioner field, and the two scrolls move relative to each other to form a plurality of compression chambers in pairs between the scrolls, and the compression chamber continuously moves in the center direction to have a volume. As the size decreases, the refrigerant is continuously sucked and compressed and discharged.

1 is a cross-sectional view illustrating a structure of a conventional scroll compressor, and FIG. 2 is a perspective view illustrating a structure of an old dam ring as a conventional scroll compressor.

As shown in FIGS. 1 and 2, the conventional scroll compressor includes a gas suction pipe SP and a gas discharge pipe DP on one side to form a sealed receiving space therein so that refrigerant gas may be sucked and discharged. A casing 1 and an upper frame 2 and a lower frame 3 respectively fixed to upper and lower sides of the casing 1 and between the upper frame 2 and the lower frame 3. Drive motor (4) for generating a rotational force, and is pressed into the center of the rotor (4b) of the drive motor 4, passing through the upper frame (2) and coupled to the turning scroll (6) to be described later drive motor (4) A fixed shaft (5) fixed to the upper portion of the upper frame (2) having a drive shaft (7) for transmitting the rotational force of the crankshaft, an involute-shaped wrap (5a), and an involute-shaped wrap (6a). To form two pairs of compression chambers P engaged with the fixed scroll 5 and continuously moving. The locking scroll 6 is coupled between the swing scroll 6 and the upper frame 2 to compress the refrigerant while moving relative to the fixed scroll 5 to prevent rotation of the swing scroll 6. It consists of an Oldham's ring (8) that turns while turning.

A shaft hole 2a is formed in the center of the upper frame 2 to support the drive shaft 7 in the radial direction, and the boss portion 6b of the turning scroll 6 is formed at the upper end of the shaft hole 2a. The boss accommodating groove 2b is expanded to be pivotal.

The drive shaft 7 is press-fitted to the rotor 4b of the drive motor 4 so that the upper and lower sides thereof are supported by the upper frame 2 and the lower frame 3, respectively, and the oil of the casing 1 is contained therein. An oil flow path 7a is formed along the axial direction so as to suck up and lubricate each bearing surface.

The fixed scroll 5 is coupled to the high and low pressure separating plate 9 which divides the inner space of the casing 1 into the discharge pressure side space S _pd and the suction pressure side space S _ps .

On the bottom of the hard plate portion of the fixed scroll 5, a wrap 5a constituting a pair of compression chambers P is formed in an involute shape, and the side of the hard plate portion has a suction side space S through a gas suction pipe SP. _A suction port (not shown) is formed to allow the refrigerant sucked into _ps ) to be sucked into the compression chamber P, and the compressed gas compressed in the final compression chamber P is discharged at the upper pressure center in the upper surface of the hard plate portion S. _A discharge port 5b is formed to be discharged to _pd ).

In addition, the upper surface of the fixed scroll (5) is provided with a check valve 10 for selectively opening and closing the discharge port (5b) to prevent the back flow of the refrigerant gas.

On the upper surface of the hard disk portion of the swinging scroll 6, the wrap 6a forming a pair of compression chambers P together with the wrap 5a of the fixed scroll 5 is formed in an involute shape, and the bottom of the hard plate portion In the center, a boss portion 6b is formed to be coupled to the drive shaft 7 to receive the power of the drive motor 4, and the boss portion 6b is a boss accommodating groove of the upper frame 2. It is inserted into 2b) to make turning motion.

The old dam ring (8) is an annular body (8a), and formed to protrude in a straight line on the upper surface of the body (8a) to constrain the movement of the turning scroll (6) in the circumferential direction of the turning scroll (6) The upper key 8b of the body 8a is formed to protrude in a straight line on the bottom of the body 8a so as to face in a direction orthogonal to the upper key 8b of the body 8a along the circumferential direction of the turning scroll 6. Consists of two lower keys (8c) for restraining movement, the bottom surface of the swing scroll 6 is formed with an upper key groove (6c) recessed to accommodate each upper key (8b), The lower key groove 2c is recessed on the upper surface of the upper frame 2 so that each lower key 8c can be accommodated.

On the other hand, reference numeral 4a denotes a stator of the drive motor 4.

Hereinafter, an operation structure of a conventional scroll compressor having the above structure will be described.

When power is applied to the drive motor 4, the swinging shaft 6 is rotated with the rotor 4b of the drive motor 4 so that the swinging scroll 6 is moved by the old dam ring 8 to the upper frame 2. The pivoting movement is made from the upper surface of the eccentric distance, and the turning scroll 6 continuously forms a pair of compression chambers P between the laps 5a and 6a with the fixed scroll 5. The compression chamber P is moved to the center by the continuous turning movement of the turning scroll 6, and the refrigerant gas is continuously sucked and compressed as the volume is reduced.

Here, the refrigerant gas is sucked into the suction pressure side space (S _ps ) through the gas suction pipe (SP), is sucked into the compression chamber (P) through the suction port is compressed and discharged through the discharge port (5b) of the fixed scroll (5) It is discharged to the pressure side space S _pd , and this refrigerant gas is discharged to a refrigeration cycle system (not shown) through the gas discharge pipe DP.

On the other hand, the oil is sucked through the oil flow path 7a of the drive shaft 7 by the centrifugal force during the high speed rotation of the drive shaft 7 and sucked up to the upper part while lubricating the shaft hole 2a of the upper frame 2 while A part is supplied between the thrust bearing surface of the turning scroll 6 and the thrust bearing surface of the upper frame 2 to be lubricated.

By the way, in the conventional scroll compressor, there is no separate restraining means for restraining the axial behavior of the old dam ring 8, which prevents the rotation of the swinging scroll 6 and pivots. By the Oldham ring (8) was inclined and the turning scroll (6) was likely to be overturned, thereby reducing the stability and efficiency of the compressor.

In addition, when the Oldham ring 8 is inclined due to the overturning moment, there is a problem in that friction and noise due to local friction force concentration are increased.

Therefore, the present invention has been devised to solve the above problems, it is possible to reduce the overturning moment applied to the turning scroll as well as to improve the stability and efficiency of the compressor, friction and local friction force concentrated and It is an object of the present invention to provide a rotating compressor of a scroll compressor which can reduce noise.

The present invention for achieving the above object, the fixed scroll is fixed to the frame having a casing to form a sealed receiving space therein, the frame is fixed to the inside of the casing, the involute-shaped wrap In the scroll compressor having an involute-shaped wrap and comprises a rotating scroll coupled to the frame and the fixed scroll so as to form a pair of two compression chambers that are engaged with the fixed scroll and continuously moving. And an upper key and a lower body which are formed between the pivoting scroll and the frame, and the upper and lower key grooves protruding from the upper and lower surfaces of the body and respectively formed on the bottom and the upper surface of the frame. An olddaming comprising a key; And a tilting restraining means for restraining the axial behavior of the old dam ring so that the tilting of the old dam ring is constrained.

The tilting restraining means may include a first catching protrusion protruding along a plate surface direction of the pivoting scroll on one side of the mutual contact surface of the lower key and the lower key groove, and the other side of the mutual contact surface of the lower key and the lower key groove. It characterized in that it comprises a first sliding groove formed in the first locking projection to be accommodated relative sliding.

In addition, the tilting restraining means may include a second catching protrusion protruding along a plate surface direction of the pivoting scroll on one side of the mutual contact surface of the upper key and the upper key groove, and the other side of the mutual contact surface of the upper key and the upper key groove. It characterized in that it further comprises a second sliding groove formed in the second locking projection to be accommodated relative sliding.

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

3 is a cross-sectional view showing the structure of a scroll compressor with a rotation preventing device according to the present invention, Figure 4 is a perspective view showing the structure of the rotating protection device according to the present invention.

However, in describing the present invention, a detailed description of a known function or configuration will be omitted to clarify the gist of the present invention.

As shown in Figures 3 to 4, the scroll compressor with a rotation preventing device according to the present invention, while forming a sealed receiving space therein one side gas suction pipe (SP) so that the refrigerant gas can be sucked and discharged And a casing 11 having a gas discharge pipe DP, an upper frame 12 and a lower frame 13 fixed to upper and lower sides of the casing 11 respectively, and an upper frame 12 and Drive motor 14 is mounted between the lower frame 13 to generate a rotational force, and is pressed in the center of the rotor (14b) of the drive motor 14 as well as passing through the upper frame 12 and the rotating scroll ( A fixed shaft 15 fixed to the upper portion of the upper frame 12 having a drive shaft 17 coupled to 16 and transmitting a rotational force of the drive motor 14, an involute-shaped wrap 15a, and It is provided with an involute wrap 16a and engaged with the fixed scroll 15 continuously. A pivoting scroll 16 which is coupled to form a pair of compression chambers P moving to a second position and compresses the refrigerant while moving relative to the fixed scroll 15, between the pivoting scroll 16 and the upper frame 12; The tilting restraining restraining the axial behavior of the Olddam ring 18 so that the tilting of the Olddam ring 18 and the Olddam ring 18 to pivot while preventing the rotation of the swinging scroll 16 can be restrained. It comprises a means.

A shaft hole 12a for radially supporting the drive shaft 17 is formed in the center of the upper frame 12, and the boss portion 16b of the turning scroll 16 is formed at the upper end of the shaft hole 12a. The boss accommodating groove 12b is extended to be pivotal.

The drive shaft 17 is press-fitted into the rotor 14b of the drive motor 14 so that the upper and lower sides thereof are supported by the upper frame 12 and the lower frame 13, respectively, and the oil of the casing 11 is contained therein. The oil flow path 17a is formed along the axial direction so that it may suck up and lubricate each bearing surface.

The fixed scroll 15 is coupled to the high and low pressure separator 19 for separating and partitioning the inner space of the casing 11 into the discharge pressure side space S _pd and the suction pressure side space S _ps .

A wrap 15a constituting two pairs of compression chambers P is formed in an involute shape on the bottom surface of the hard plate part of the fixed scroll 15, and the suction pressure side space S is provided on the side of the hard plate part through a gas suction pipe SP. _A suction port (not shown) is formed to allow the refrigerant sucked into _ps ) to be sucked into the compression chamber P, and the compressed gas compressed in the final compression chamber P is discharged at the upper pressure center in the upper surface of the hard plate portion S. _A discharge port 15b is formed to be discharged to _pd ).

In addition, the upper surface of the fixed scroll 15 is provided with a check valve 110 for selectively opening and closing the discharge port (15b) to prevent the back flow of the refrigerant gas.

On the upper surface of the hard plate portion of the turning scroll 16, the wrap 16a constituting a pair of compression chambers P together with the wrap 15a of the fixed scroll 15 is formed in an involute shape, and the bottom of the hard plate portion In the center, the boss shaft 16b is coupled to the drive shaft 17 to receive the power of the driving motor 14, and the boss portion 16b is a boss receiving groove of the upper frame 12. It is inserted into 12b) to make turning motion.

The old dam ring 18 is formed in an annular ring shape and is disposed between the pivoting scroll 16 and the upper frame 12 and the upper surface of the body 18a in the thickness direction. And an upper key 18b which is formed to restrain the movement of the turning scroll 16 along the circumferential direction of the turning scroll 16, and protrudes along the thickness direction of the bottom surface of the body 18a to form the turning scroll 16. It comprises a lower key (18c) for restraining the movement of the body (18a) in the circumferential direction.

In addition, a plurality of upper key grooves 16c are recessed on the bottom of the turning scroll 16 so that each upper key 18b can be accommodated in a predetermined movement, and each lower key on the upper surface of the upper frame 12. A plurality of lower key grooves 12c are recessed so that the 18c can be accommodated in a predetermined movement, and the keys 18b and 18c are coupled to the key grooves 16c and 12c and are rotated. ) And the body 18a to restrain the rotation of the turning scroll 16.

In addition, the tilting restraining means may include a first locking protrusion 18d protruding along the plate surface direction of the revolving scroll 16 on either side of the contact surface of the lower key 18c and the lower key groove 12c, and the lower key ( 18c) and a first sliding groove 12d formed on the other side of the mutual contact surface of the lower key groove 12c so as to be slidably accommodated. A first locking projection 18d is formed in the lower key 18c, and a first sliding groove 12d is formed in the lower key groove 12c.

That is, the first locking projection 18d is protruded along the plate surface direction of the revolving scroll 16 at the end along the protruding direction of the lower key 18c and has a predetermined length along the longitudinal direction of the lower key 18c. The first sliding groove 12d is formed on the sidewall of the lower key groove 12c such that the first locking protrusion 18d can be accommodated in the sliding direction along the longitudinal direction of the lower key groove 12c. In this structure, the lower key 18c accommodated in the lower key groove 12c is constrained by the first locking projection 18d and the first sliding groove 12d and the old dam ring 18 for the upper frame 12. Allows the axial behavior of to be constrained

In addition, the tilting constraining means according to the embodiment of the present invention is a second locking projection (protrudingly formed along the plate surface direction of the turning scroll 16 on one side of the mutual contact surface of the upper key 18b and the upper key groove 16c ( 18d ') and the second sliding groove 16d which is formed so that the second locking projection 18d' can be accommodated relative to the other side of the contact surface between the upper key 18b and the upper key groove 16c. It may be configured to include more.

That is, the second locking projection 18d 'protrudes along the plate surface direction of the revolving scroll 16 at the end along the protruding direction of the upper key 18b and has a predetermined length along the longitudinal direction of the upper key 18b. The second sliding groove 16d is formed on the sidewall of the upper key groove 16c so that the second locking protrusion 18d 'can be accommodated to be relatively slidable along the longitudinal direction of the upper key groove 16c. As such, the structure is such that the upper key 18b accommodated in the upper key groove 16c is restrained by the second locking projection 18d 'and the second sliding groove 16d and the old dam ring for the turning scroll 16. The axial behavior of (18) can be restrained and the axial behavior of the old dam ring 18 together with the first locking projection 18d and the first sliding groove 12d can be more stably restrained.

On the other hand, reference numeral 14a denotes a stator of the drive motor 14.

Hereinafter, the operation structure of the scroll compressor with a rotation preventing device according to the present invention.

When power is applied to the drive motor 14, the rotating shaft 16 is rotated with the rotor 14b of the drive motor 14, the turning scroll 16 by the old dam ring 18, the upper frame 12 The pivoting movement is made from the upper surface of the eccentric distance, and the turning scroll 16 continuously forms a pair of compression chambers P between the wraps 15a and 16a with the fixed scroll 15. The compression chamber P is moved to the center by the continuous turning motion of the turning scroll 16 and the refrigerant gas is continuously sucked and compressed as the volume is reduced.

Here, the refrigerant gas is sucked into the suction pressure side space S _ps through the gas suction pipe SP, sucked into the compression chamber P through the suction port, and is compressed, and then discharged through the discharge port 15b of the fixed scroll 15. It is discharged to the pressure side space S _pd , and this refrigerant gas is discharged to a refrigeration cycle system (not shown) through the gas discharge pipe DP.

On the other hand, the oil is sucked through the oil flow path 17a of the drive shaft 17 by the centrifugal force during the high speed rotation of the drive shaft 17 and sucked to the upper part, while some lubricates the shaft hole 12a of the upper frame 12. A part is supplied between the thrust bearing surface of the turning scroll 16 and the thrust bearing surface of the upper frame 12 to allow lubrication.

On the other hand, when an overturning moment is generated during operation of the compressor, the old dam ring 18 is constrained in its axial behavior by tilting prevention means composed of the fixing protrusions 18d and 18d 'and the sliding grooves 12d and 16d. As such, such a structure allows the tilting of the old dam ring 18 by the tipping moment to be constrained and reduces the risk of tipping of the turning scroll 16.

As such, the present invention can reduce the risk of overturning the turning scroll 16 to improve stability and efficiency, and reduce friction and noise due to localized frictional force concentration.

In the above described a preferred embodiment of the present invention by way of example, the scope of the present invention is not limited only to this specific embodiment, it can be changed appropriately within the scope described in the utility model registration claims.

As seen above, according to the anti-rotation device of the scroll compressor according to the present invention, by restraining the axial behavior of the old dam ring and the tilting of the old dam ring can be restrained, it is possible to reduce the overturn moment applied to the turning scroll. Of course, the stability and efficiency of the compressor can be improved, and friction and noise due to localized frictional force concentration can be reduced.

1 is a cross-sectional view showing the structure of a conventional scroll compressor

Figure 2 is a conventional scroll compressor, a perspective view showing the structure of the Oldham ring

3 is a cross-sectional view showing the structure of a scroll compressor with a rotation preventing device according to the present invention

Figure 4 is a perspective view showing the structure of the anti-rotation device according to the present invention

<Explanation of symbols for the main parts of the drawings>

11: casing 12,13: frame

12c: Lower keyway 12d: First sliding groove

14: drive motor 15: fixed scroll

16: turning scroll 16c: upper key groove

16d: second sliding groove 17: drive shaft

18 Oldalling 18a Body

18b: upper key 18c: lower key

18d: first jammer 18d ': second jammer

Claims (3)

A casing forming a sealed receiving space therein, a frame fixedly installed in the casing, a fixed scroll fixed to the frame with an involute wrap, and an involute wrap; In the scroll compressor including a swinging scroll coupled to the frame and the fixed scroll so as to form a pair of two compression chambers that are continuously engaged with the fixed scroll, An upper key and a lower key protruding from the body disposed between the pivoting scroll and the frame, the upper and lower key grooves protruding from the upper and lower surfaces of the body and respectively formed on the lower surface of the pivoting scroll and the upper surface of the frame; Olddam ring and including; And a tilting restraining means for restraining the axial behavior of the old dam ring so that the tilting of the old dam ring can be constrained. The method of claim 1, The tilting restraining means may include a first catching protrusion protruding along a plate surface direction of the pivoting scroll on one side of the mutual contact surface of the lower key and the lower key groove, and the other side of the mutual contact surface of the lower key and the lower key groove. The rotation preventing device of the scroll compressor, characterized in that it comprises a first sliding groove is formed so that the first locking projection can be accommodated relative sliding. The method of claim 2, The tilting restraining means may include a second catching protrusion protruding along a plate surface direction of the pivoting scroll on either side of the mutual contact surface of the upper key and the upper key groove, and the other side of the mutual contact surface of the upper key and the upper key groove. The rotation preventing device of the scroll compressor, characterized in that it further comprises a second sliding groove is formed so that the second locking projection can be accommodated relative sliding.