KR101484312B1 - Compressing mechanism for scroll compressor - Google Patents

Abstract

The present invention relates to a compression mechanism of a scroll compressor. A key groove 57 is formed on one side of the frame 50 and a key groove 77 is formed on the surface of the orbiting scroll 70 so as to face the key groove 57 of the frame 50 . The key grooves 57 and 77 are formed orthogonally to each other. The first and second guide keys 82 and 84 of the self-front zone 80 are inserted into the key grooves 57 and 77, respectively. The first and second guide keys 82 and 84 of the self-facing region 80 are formed to be shorter than the length of the key groove 77 and are perpendicular to each other. The orbiting scroll 70 has a bearing 75 formed at its center and an eccentric pin 59 'of a crankshaft 59 rotatably installed through the frame 50 is rotatably installed. In the present invention, the number of the self-front regions (80) is used to prevent the rotation of the orbiting scroll (70). The self-forward region (80) is small in size, It can be used in compression mechanism parts of various specifications according to the number of used parts, and there is an advantage that it can be used in common.

Scroll compressor, compression mechanism, orbiting scroll, fixed scroll, anti-rotation

Description

[0001] COMPRESSING MECHANISM FOR SCROLL COMPRESSOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor, and more particularly, to a compression mechanism of a scroll compressor in which refrigerant is compressed by an orbiting scroll and a fixed scroll.

FIG. 1 is a sectional view of the structure of a compression mechanism of a scroll compressor according to the prior art, and shows the oiling damper for preventing rotation of the orbiting scroll in a perspective view.

According to this, the sealed container (10) forms the appearance of the scroll compressor. A frame 12 is installed in the closed space formed in the closed container 10. A through hole 13 'is formed so as to penetrate through the bearing 13 and the center of the frame 12.

The crank shaft 15 is rotatably installed through the through hole 13 '. One end of the crankshaft 15 is press-fitted into the rotor so as to rotate integrally with a rotor (not shown) of the motor unit. An eccentric pin 15e is provided at the other end of the crankshaft 15 at a position eccentric from the center of rotation of the crankshaft 15. [ A balance weight 15a is provided on the crankshaft 15 to eliminate rotation imbalance caused by the eccentric pin 15e.

The fixed scroll (17) is fixed to the frame (12). The fixed scroll (17) is provided with a fixed wraps (17r) of a wavy line shape on one surface of the fixed body portion (17b). And a discharge hole 17e communicating with the compression space formed by the fixed lap 17r and the inner space of the hermetically sealed container through the center of the fixed scroll 17 is provided. The refrigerant compressed in the compression space is discharged through the discharge hole 17e. Reference numeral 18 denotes a suction pipe which serves to transfer the refrigerant from the outside of the closed vessel 10 to the compression space.

An orbiting scroll (20) is provided on the frame (12) so as to be rotated by the crank shaft (15) so as to face the fixed scroll (17). The orbiting scroll (20) forms a skeleton of a substantially circular plate turning body (20b). On one surface of the turning body 20b, that is, on the surface facing the fixed scroll 17, a orbiting wrap 20r is provided. The orbiting wrap 20r protrudes in a vortex shape from the orbiting body 20b and forms a compression space in cooperation with the fixed lap 17r.

A pin bearing portion 20 'is formed on the opposite side of the turning body 20b of the orbiting wrap 20r on which the orbiting wrap 20r is formed. The pin bearing portion 20 'is a portion to which the eccentric pin 15e of the crankshaft 15 is inserted.

An orbiting ring 22 is installed between the orbiting scroll 20 and the frame 12 as shown in a perspective view in Fig. The above-mentioned damping 22 is constituted by forming a key 23 'on a ring-shaped ring body 23. The key 23 'is protruded on both sides of the ring body 23 at intervals of 180 degrees, and the key 23' is spaced 90 degrees apart on both sides. The key 23 'of the overdrum 22 is seated in the keyway 12k, 20k formed in the frame 12 and the orbiting scroll 20 so as to be movable a predetermined distance. The orbiting ring 22 prevents the orbiting scroll 20 from rotating when the revolving scroll 20 revolves while drawing a constant locus by the eccentric pin 15e.

The refrigerant is compressed in the compression mechanism of the conventional scroll compressor having such a structure. When the crankshaft 15 is rotated by the driving of the motor, the eccentric pin 15e of the crankshaft 15 forms a circular trajectory. The movement of the eccentric pin 15e causes the orbiting scroll 20 to move along a circular trajectory.

The movement of the orbiting scroll (20) causes the refrigerant to be compressed while the fixed lap (17r) and the orbiting lap (20r) move toward the center in the centrifugal direction of the compression space between them. That is, the refrigerant sucked into the compression space through the suction pipe 18 is compressed in the compression space formed by the fixed scroll 17 and the fixed lap 17r of the orbiting scroll 20 and the orbiting lap 20r will be. The refrigerant compressed in the compression space is discharged to the outside of the compression space through the discharge hole 17e and to the outside of the closed vessel 10 through an unillustrated discharge pipe.

The wheel 22 is moved in the key grooves 12k and 20k in accordance with the circular movement of the orbiting scroll 20 to prevent the orbiting scroll 20 from rotating .

However, the above-described conventional techniques have the following problems.

First, the above-mentioned damings 22 are formed so as to have approximately the same size as the orbiting scroll 20. [ Accordingly, there is a problem that the size of the compression mechanism of the scroll compressor using the above-mentioned damper 22 becomes large, so that the space utilization rate becomes low and the manufacturing cost increases.

The alluding 22 must support the force acting between the frame 12 and the orbiting scroll 20 by all four keys 23 '. Therefore, there is a problem that the force acting on each of the keys 23 is large and durability is deteriorated.

Further, when the size of the compression mechanism such as the orbiting scroll 20 is changed, the size of the above-mentioned damming 22 must be changed together. Therefore, it is not possible to share the above-mentioned derailleur 22, and there is a problem that the derailleur 22 has to be provided in various sizes depending on the size of the orbiting scroll 20 and the like.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional art as described above, and to reduce the overall size of the scroll compressor in order to prevent rotation of the orbiting scroll.

Another object of the present invention is to provide a scroll compressor capable of employing a plurality of ore dams for preventing rotation of the orbiting scroll.

It is still another object of the present invention to make alluding for preventing rotation of the orbiting scroll in the scroll compressor.

According to an aspect of the present invention for achieving the above object, the present invention provides a motorcycle comprising a frame having a through hole through which a crankshaft is rotatably inserted, and a stationary wedge- And a wedge-shaped orbiting wrap which is provided between the frame and the fixed scroll and cooperates with the fixed lap to form a compression space, and the eccentric pin of the crankshaft is inserted into the center bearing portion And a revolving scroll which revolves along a circular path by driving of a crankshaft, characterized in that the key groove of the frame and the orbiting scroll of the orbiting scroll The first and second guide keys, which are perpendicularly connected to each other in the key groove, are inserted and guided, It is configured to include at least two front chair district for preventing the rotation of the scroll.

At both sides of the key groove of the frame and the key groove of the orbiting scroll, recessed grooves are respectively formed, wherein the diameter of the recessed groove is shorter than the length of the first and second guide keys.

The first and second guide keys are formed in a square pillar shape.

At both ends of the first and second guide keys, protruding curved portions are formed.

A guide ball is provided at both ends of a face of the first and second guide keys opposite to the inner surface of the key groove of the frame and the orbiting scroll, the guide ball partially protruding from the surfaces of the first and second guide keys And is installed in the ball insertion hole.

The following effects can be obtained in the compression mechanism portion of the scroll compressor according to the present invention.

First, according to the present invention, since the self-propelled earth preventing rotation of the orbiting scroll in the scroll compressor is miniaturized, the structure of the compression mechanism of the scroll compressor can be miniaturized.

In the present invention, the number of the self-front regions for preventing rotation of the orbiting scroll can be adjusted according to the size of the components constituting the compression mechanism such as orbiting scroll, and the load applied to one self- The durability of the mechanical section can be improved.

In addition, in the present invention, a self-facing earth having a specific size can be used in a compression mechanism of various types of scroll compressors, so that it is possible to jointly use the forward grooves to reduce the manufacturing cost of the scroll compressor.

Hereinafter, preferred embodiments of the compression mechanism of the scroll compressor according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view of a preferred embodiment of the compression mechanism of the scroll compressor according to the present invention, and FIG. 3 is a perspective view showing the constructions of the fixed scroll and the orbiting scroll constituting the embodiment of the present invention.

According to these drawings, the frame 50 is installed in a closed space formed inside a hermetically sealed container (not shown) constituting the outer appearance of the scroll compressor. The frame 50 is preferably formed in a substantially disc shape as in the present embodiment, but it is not necessarily so. A cylindrical bearing portion 52 is formed at the lower center of the frame 50 to protrude therefrom. A through hole 53 is formed through the center of the bearing portion 52 and through the center of the frame 50. Reference numeral 55 denotes a fastening hole for allowing the fixed scroll 60 to be fastened to the frame 50, which will be described below.

A plurality of keyways (57) are formed on the opposite side of the frame (50) where the bearing portion (52) protrudes. In this embodiment, the three key grooves 57 are all formed in the same direction. The key groove 57 is a rectangular groove in a plan view, and each of the key grooves 57 is formed parallel to each other. Grooves 58 are formed on both sides of the middle portion of the key groove 57. The concave groove 58 is formed in a circular shape having a center corresponding to the key groove 57. The diameter of the recessed groove 58 should be less than the length of the second guide key 84 of the self-supporting region 80, which will be described below. The groove (58) serves to minimize friction between the self-in-front region (80) and the frame (50).

A crank shaft 59 is provided through the through-hole 53 of the frame 50. The crankshaft 59 serves to transmit the rotational force of the motor unit (not shown) to the orbiting scroll 70, which will be described below. An eccentric pin 59 'is formed at one end of the crankshaft 59 at a position eccentric from the center of rotation of the crankshaft 59. The eccentric pin 59 'causes a rotation imbalance when the crankshaft 59 rotates. In order to solve this problem, a disk-shaped counterbalance 59b may be provided on the claw shaft 59 so as to protrude in a direction opposite to a direction in which the eccentric pin 59 'is eccentric.

The fixed scroll (60) is fixed to the frame (50). The stationary body part 62 forms a skeleton and the fixed scroll part 60 protrudes from the fixed body part 62 on one side thereof. A suction hole 66 is formed through the fixed body portion 62 so as to communicate with the edge of the fixed body portion 62 of the space formed by the fixed wraps 64. A separate suction pipe (not shown) is connected to the suction hole 66 to connect the refrigerant delivered from the outside to the stationary wrap 64 and the orbiting wrap 74 of the orbiting scroll 70, To be transmitted to the compression space.

A discharge hole 68 is formed through the fixed body portion 62 so as to communicate with a portion corresponding to the center of the compression space formed by the fixed wraps 64 and the orbiting wraps 74. The discharge hole 68 is a path for discharging the compressed refrigerant in the compression space to the outside of the compression space. Reference numeral 69 denotes a portion through which the fastening member for fastening the fixed scroll 60 to the frame 50 passes. The fastening hole 69 is formed along the edge of the fixed scroll 60 and corresponds to the fastening hole 55 formed in the frame 50.

The revolving scroll 70 is installed in a space formed between the frame 50 and the fixed scroll 60 and revolves while drawing a predetermined locus by the eccentric pin 59 'of the crankshaft 59 . The orbiting scroll 70 forms a skeleton of the orbiting body 72 and is formed by a vortex-like orbiting wrap 74 protruding toward the fixed scroll 60. The stationary wrap 64 and the orbiting wrap 74 cooperate to form a compression space therebetween. The compression space is compressed as the orbiting scroll (74) moves with respect to the stationary wrap (64) while the orbiting scroll (70) revolves while drawing a circular locus while the refrigerant moves from the outside to the center of the compression space.

The swivel body portion 72 of the orbiting scroll 70 has a bearing portion 75 protruded on the opposite side of the orbiting wrap 74. The eccentric pin 59 'of the crankshaft 59 is inserted into the bearing portion 75.

A number of key grooves 77 as the key grooves 57 of the frame 50 are formed on the surface of the revolving body portion 72 where the bearing portion 75 is formed. The key grooves 77 are formed in the same direction, and are formed perpendicular to the key grooves 57 of the frame 50. The key groove 77 also has a rectangular shape in plan view.

At both sides of the intermediate portion of the key groove 77, a concave groove 78 is formed. The concave groove 78 is formed in a circular shape having a center corresponding to the key groove 77. The diameter of the recessed groove 78 should be less than the length of the first guide key 82 of the forward region 80, which will be described below. The recessed grooves 78 serve to minimize friction between the self-facing region 80 and the orbiting scroll 70.

The forward region 80 prevents the orbiting scroll 70 from rotating when the orbiting scroll 70 moves along the circular path by the crankshaft 59. That is, when the orbiting scroll (70) relatively moves relative to the frame (50) or the fixed scroll (60), the revolving scroll (70) is revolved only along the circular trajectory. The first and second guide keys 82 and 84 are guided along the key grooves 57 and 77 so that the first guide key 82 and the second guide key 84 are perpendicular to each other. Each of the first guide key 82 and the second guide key 84 is formed into a square pillar shape in this embodiment. However, the first guide key 82 and the second guide key 84 may be formed into a rod shape if they can be guided and moved in the key grooves 57, 57.

In the present embodiment, three such forward-facing regions 80 are used, and at least two or more are preferably used. Of course, the number of the self-front regions 80 should be determined so as to prevent the rotation while sufficiently supporting the external force applied to the orbiting scroll 70. [

Another embodiment of the self-facing region is shown in Fig. According to this, another embodiment of the self-in front region 180 is configured differently in order to minimize the frictional force between the frame 50 and the key grooves 57, 77 of the orbiting scroll 70. That is, protruding curved portions 183 and 185 are provided at both ends of the first and second guide keys 182 and 184 constituting the self-supporting front portion 180. The protruding curved portions 183 and 185 are protruded most from the guide keys 182 and 184 so as to be in point contact with the inner surfaces of the key grooves 57 and 77. By doing so, it is possible to minimize the frictional force generated during the movement of the self-forward region 80.

5 shows yet another embodiment of the self-facing region. According to the present invention, the self-running region 280 of the present embodiment forms ball insertion holes 282 'and 284' to be opened to the surfaces of the first and second guide keys 282 and 284 perpendicular to each other, Guide balls 283 and 285 are rotatably installed in the guide grooves 282 'and 284'. The guide balls 283 and 285 protrude from the ball insertion holes 282 'and 284' to protrude from the inner surfaces of the key grooves 57 and 77, as shown in the cross- . The guide balls 283 and 285 can be freely rotated in the ball insertion holes 282 'and 284' so that they can make a rolling contact with the inner surfaces of the key grooves 57 and 77.

The guide balls 283 and 285 are respectively formed on opposite sides of the guide grooves 282 and 284 facing the key grooves 57 and 77. In this embodiment, Guide balls 283 and 285 were used. Actually, at least two guide balls 283 and 285 should be installed on one side of one guide key 282 and 284. The guide balls 283 and 285 are provided at both ends of the guide keys 282 and 284 in the longitudinal direction on one side. In order to allow a part of the guide balls 283 and 285 to be inserted into the ball insertion holes 282 'and 284' of the guide keys 282 and 284, the guide keys 282 and 284 may be composed of several pieces, A portion forming the holes 282 ', 284' should be made separately and be attached or fixed after the insertion of the guide balls 283, 285.

Hereinafter, the operation of the compression mechanism of the scroll compressor according to the present invention will be described in detail.

Fig. 6 is an explanatory diagram for explaining that the orbiting scroll is moved along the idle locus without being rotated by the self-front earth. The refrigerant is compressed by the revolution of the orbiting scroll 70 in the scroll compressor.

First, when power is applied to the scroll compressor, the crankshaft 59 is rotated while the motor is driven. The rotation of the crankshaft 59 causes the eccentric pin 59 'to draw a predetermined trajectory. That is, the orbiting scroll 70 moves along a circular path having a radius equal to the eccentric length of the eccentric pin 59 'at the rotation center of the crankshaft 59.

At this time, the self-forward region 80 plays a role in allowing the orbiting scroll 70 to move without rotating about the frame 50 or the fixed scroll 60. That is, the first and second guide keys 82 and 84 of the self-drive region 80 move along the key grooves 57 and 77 in the state shown in FIG. 70) to rotate while preventing rotation.

6, since the key groove 57 is formed in the frame 50, there is no movement, and the self-front region 80 is moved along the key groove 57 with respect to the frame 50 . 6, the movement of the key groove 77 indicated by the dotted line is considered to be the movement of the orbiting scroll 70. [0064] The relative movement between the guide groove 77 and the second guide key 84 is represented by a dashed arrow and the movement of the orbiting scroll 70 by a thick arrow .

6, one end of the first guide key 82 is located at one end of the key groove 57, and the second guide key 84 is located at the center of the key groove 77. In this state, In this state, when the orbiting scroll 70 rotates in the direction of arrow a1, the first guide key 82 of the self-front region 80 is moved along the key groove 57 by the movement of the orbiting scroll 70, b1 direction. At this time, the key groove 77 with respect to the second guide key 84 is moved in the direction of the arrow c1 by the movement of the orbiting scroll 70.

By the above movement, the state of FIG. 6B is obtained. That is, the first guide key 82 is located at the center of the key groove 57, and the second guide key 84 is located at the right end of the key groove 77.

The movement of the orbiting scroll 70 in the a2 direction is brought to the c-state in the state b of Fig. 6, that is, the first guide key 82 continues to move in the direction of the arrow b2 along the key groove 57 The key groove 77 is moved in the direction of the arrow c2 with respect to the second guide key 84 by the movement of the orbiting scroll 70 and the second guide key 84 is inserted into the center of the key groove 77 . That is, the state of FIG. 6C is obtained.

6, the movement of the orbiting scroll 70 in the direction of arrow a3 causes the first guide key 82 to move along the key groove 57 toward the direction of arrow b3 The key groove 77 is moved in the direction of arrow c3 with respect to the second guide key 84 so that one end of the second guide key 82 is positioned at the left end of the key groove 77 in the drawing.

6, the revolving scroll 70 is revolved one time. That is, when the orbiting scroll 70 moves in the direction of arrow a4, the first guide key 82 moves in the direction of arrow b4 along the key groove 57, and the key groove 77 moves in the direction of arrow c4 So that the center of the second guide key 84 is at the center of the key groove 77. That is, the state a shown in FIG. 6 is established. The following revolutions of the orbiting scroll 70 are repeatedly performed.

The revolution of the orbiting scroll (70) causes the refrigerant to be compressed in the compression space formed by the fixed lap (64) and the orbiting wrap (74). That is, the refrigerant entering through the suction hole 66 starts to be compressed from the relatively outer portion of the compression space created by the orbiting wrap 74 and the fixed lap 64 and moves to the central portion. The compressed refrigerant is discharged through the discharge hole (68).

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

For reference, the shapes of the components of the embodiment shown in the drawings, that is, the frame 50, the crankshaft 59, the fixed scroll 60, the orbiting scroll 70, etc., Its shape can be different.

1 is a cross-sectional view showing a configuration of a compression mechanism of a scroll compressor according to a related art, and FIG.

2 is an exploded perspective view showing a configuration of a preferred embodiment of a compression mechanism of a scroll compressor according to the present invention.

3 is a perspective view showing a structure of a fixed scroll and an orbiting scroll constituting an embodiment of the present invention.

4 is a perspective view showing a structure of another embodiment of a self-facing earth constituting an embodiment of the present invention.

5 is a perspective view showing a configuration of another embodiment of a self-facing earth constituting an embodiment of the present invention.

6 is an explanatory view showing that the self-forward region is guided in the key groove of the frame and the orbiting scroll in the embodiment of the present invention.

Description of the Related Art [0002]

50: frame 52: bearing part

53: through hole 55: fastener

57: Key groove 58: Needle groove

59: crank shaft 59 ': eccentric pin

59b: balance weight 60: fixed scroll

62: fixed body portion 64: stationary wrap

66: suction hole 68: exhaust hole

69: fastener 70: orbiting scroll

72: turning body part 74: orbiting wrap

75: Bearing part 77: Key groove

78: Entry groove 80:

82: first guide key 84: second guide key

Claims (5)

A frame 50 formed with a through hole 53 through which a crankshaft 59 is rotatably inserted, A stationary scroll (60) fixed to the frame (50) and having a wedge - shaped fixed wraps (64) projecting from one side thereof; A swirling vortex wrap 74 provided between the frame 50 and the fixed scroll 60 and forming a compression space in cooperation with the fixed wraps 64 is formed to protrude from the crankshaft 59, And a revolving scroll (70) which is inserted into a bearing portion (75) at the center thereof and which revolves around a circular path by driving of a crankshaft (59) , The first and second key grooves 57 and 70 of the frame 50 and the orbiting scroll 70 are formed on the opposite surfaces of the frame 50 and the orbiting scroll 70, And at least two self-supporting regions (80) for guiding the orbiting scroll (70) by inserting and guiding the second guide keys (82, 84), respectively, Recessed grooves 58 and 78 are formed on both sides of the key groove 57 of the frame 50 and the key groove 77 of the orbiting scroll 70. The diameter of the grooves 58 and 78 Is shorter than the length of the first and second guide keys (82, 84). delete The method according to claim 1, Wherein the first and second guide keys (82, 84) are formed in a square pillar shape. A frame 50 formed with a through hole 53 through which a crankshaft 59 is rotatably inserted, A stationary scroll (60) fixed to the frame (50) and having a wedge - shaped fixed wraps (64) projecting from one side thereof; A swirling vortex wrap 74 provided between the frame 50 and the fixed scroll 60 and forming a compression space in cooperation with the fixed wraps 64 is formed to protrude from the crankshaft 59, And a revolving scroll (70) which is inserted into a bearing portion (75) at the center thereof and which revolves around a circular path by driving of a crankshaft (59) , The first and second key grooves 57 and 70 of the frame 50 and the orbiting scroll 70 are formed on the opposite surfaces of the frame 50 and the orbiting scroll 70, And at least two self-supporting regions (80) for guiding the orbiting scroll (70) by inserting and guiding the second guide keys (82, 84), respectively, Wherein protruding curved portions (183, 185) are formed at both ends of the first and second guide keys (182, 184). A frame 50 formed with a through hole 53 through which a crankshaft 59 is rotatably inserted, A stationary scroll (60) fixed to the frame (50) and having a wedge - shaped fixed wraps (64) projecting from one side thereof; A swirling vortex wrap 74 provided between the frame 50 and the fixed scroll 60 and forming a compression space in cooperation with the fixed wraps 64 is formed to protrude from the crankshaft 59, And a revolving scroll (70) which is inserted into a bearing portion (75) at the center thereof and which revolves around a circular path by driving of a crankshaft (59) , The first and second key grooves 57 and 70 of the frame 50 and the orbiting scroll 70 are formed on the opposite surfaces of the frame 50 and the orbiting scroll 70, And at least two self-supporting regions (80) for guiding the orbiting scroll (70) by inserting and guiding the second guide keys (82, 84), respectively, Guide balls 283 and 285 are provided at both ends of a face of the first guide key 282 and the second guide key 282 facing the inner surfaces of the key grooves 57 and 77 of the frame 50 and the orbiting scroll 70, Wherein the guide balls (283, 285) are installed in the ball insertion holes (282 ', 284') such that the guide balls (283, 285) partially protrude from the surfaces of the first and second guide keys (282, 284).

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