KR101003954B1 - Rotary compressor equipped with combined driving shaft-vane - Google Patents

Abstract

The present invention is a cylindrical housing (housing), a housing cover attached to the bottom of both sides of the housing, a cylindrical rotor eccentrically rotated inside the housing between the housing cover of both sides, through the inside of the rotor and the housing A drive shaft is formed to be concentric with and is inserted to protrude from the outer diameter surface of the rotor through the fitting member formed in the gap formed on the outer diameter surface of the rotor, one side of which is fixed integrally to the drive shaft and the other side is a constant distance from the inner wall surface of the housing. A vane that rotates with the drive shaft while maintaining a vane, a sliding tip seal that protrudes by a centrifugal force in a slot provided at the tip of the vane to fill a leakage gap between the vane tip and the inner wall of the housing, and A suction pipe for supplying gas to the inside of the housing and a compressed ball inside the housing In the vane rotary compressor comprising a discharge pipe for discharging, the vane protruding through the outer diameter of the rotor serves as a diaphragm for dividing the space formed between the housing and the rotor into the compression chamber and the suction chamber, When the drive shaft rotates, the vanes fixed integrally to the drive shaft rotate together and the rotor is pushed and rotated by the vanes to compress the gas inside the compression chamber formed by the vane front surface and the vane front housing inner surface and the rotor outer surface. It relates to a vane rotary compressor characterized in that.

Housing, housing cover, rotor, rotor cover, drive shaft, vane, sliding tip seal, counterweight, vane compliance means, vane compliance means seat, rotor bearing, shaft bearing, suction chamber, compression chamber, suction tube, discharge tube, suction port Outlet

Description

ROTARY COMPRESSOR EQUIPPED WITH COMBINED DRIVING SHAFT-VANE}

The present invention relates to a vane rotary compressor used in various industrial fields, more specifically, the vane inserted into the vane slot of the rotor serves to separate the suction chamber and the compression chamber by the vane tip being adhered to the inner wall of the housing by centrifugal force. In particular, the present invention relates to a vane rotary compressor having an integrated drive shaft-vane in which vanes are integrally fixed to the drive shaft in order to prevent friction losses occurring between the vane tip and the inner wall of the housing.

In general, vane rotary compressors have been widely used as a kind of air compressor in refrigerant compressors for automobile air conditioners and various industrial fields.

1 shows a cross-sectional side view of a specific embodiment of a vane rotary compressor according to the prior art.

In the conventional vane rotary compressor 100 illustrated in FIG. 1, a rotor 120 connected to a drive shaft inside a housing 150 rotates, and at this time, a vane 123 inserted into a vane slot 122 provided in the rotor 120. The vane tip 124 is brought into close contact with the inner wall surface 131 of the housing by centrifugal force.

Gas entering the suction chamber 161 through the suction pipe 151 is trapped in the space formed between the outer diameter surface 121 of the rotor, the inner wall surface 131 of the housing, and the two vanes 123, the rotor 120 As the volume rotates, the volume of the compression chamber 160, which is an enclosed space, decreases, so that the gas in the compression chamber 160 is compressed, and when the gas reaches the discharge port 172, the compressed gas is discharged through the discharge pipe 152 connected thereto. Will be.

However, such a conventional vane rotary compressor 100 has a problem that the friction loss between the vane tip 124 and the housing inner wall surface 131 is very large.

In other words, in the case of the conventional vane rotary compressor 100, the vane 123 is pushed out along the vane slot 122 by the centrifugal force in accordance with the rotation of the rotor 120, the vane tip 124 is the inner wall surface of the housing ( In contact with the 131, the vane tip 124 slides along the housing inner wall 131 while maintaining the state of contact with the housing inner wall 131. At this time, the friction loss at the vane tip 124 is proportional to the relative speed between the vane tip 124 and the housing inner wall surface 131. In the conventional vane rotary compressor 100, the housing inner wall surface 131 is stopped. Since only the vane 123 rotates at a speed corresponding to the rotational speed of the rotor 120, the relative speed between the vane tip 124 and the inner wall surface 131 of the housing becomes very large, and the friction loss is correspondingly increased. There was a problem.

The present invention is to solve the problem of a large friction loss between the vane tip and the inner wall surface of the housing, the vane is fixed to the drive shaft so as to rotate integrally with the drive shaft and the rotation center of the rotor is the rotation center of the drive shaft It is an object of the present invention to provide a compressor provided with a vane movement adaptation means so as to solve a movement interference between vanes and vanes provided on the outer diameter surface of the rotor generated because they do not coincide with each other.

Through this, the rotor rotates together with the vane in response to the vane movement integrated with the driving shaft to perform gas compression, but essentially eliminates friction loss between the vane tip and the inner wall of the housing due to the centrifugal force of the vane. The purpose of this invention is to provide a compressor that can maximize the efficiency of the vane rotary compressor by preventing the leakage in the small gap between the tip and the housing by the sliding tip seal.

The present invention is to solve the problems of the prior art, the compressor according to the present invention is a cylindrical housing (housing), a housing cover attached to both bottom surfaces of the housing, the housing center and between the housing cover in the housing; A cylindrical rotor installed eccentrically, a drive shaft installed in the rotor and centered with the housing, a counterweight attached to one side of the vanes across the drive shaft to offset centrifugal force, and the rotor so as to approach the inner wall of the housing. A vane projecting through the outer diameter surface of the vane to form a closed space, a suction pipe supplying gas to the inside of the housing, and a discharge tube discharging the compressed gas from the inside of the housing, and the vane penetrates the outer diameter surface of the rotor. Vane compliance means for receiving interference due to the relative movement of the vane and the rotor, A vane compliance means seat provided on the outer peripheral surface of the rotor to allow the vane compliance means to receive a relative rotational motion with respect to the outer peripheral surface of the rotor, and the vane compliance means in the center of the vane compliance means to receive the sliding movement of the vane. A vane slot installed to have a predetermined length and width, a discharge groove installed on the inner wall of the housing provided to secure a sufficient flow path immediately before reaching the discharge hole when the gas compressed inside the housing flows toward the discharge port, and the gas compressed inside the housing. It includes a discharge valve to be discharged only when a certain pressure is reached, the vane, one side is connected to the drive shaft and integrally rotates with the drive shaft and the other side is integral with the drive shaft to maintain a gap of the housing inner surface and a predetermined distance It is characterized in that the connection is installed.

At this time, the compressor according to the present invention is inserted into the sliding tip seal groove provided in the tip portion of the vane which rotates together with the drive shaft integrally and slides toward the inner wall of the housing during the rotational movement of the vane to occur in the gap between the vane tip and the inner wall of the housing. It is preferable to further include a sliding tip seal which serves as a seal to prevent possible leakage.

According to the compressor of the present invention having the technical configuration as described above, by connecting the vane to the drive shaft so that the centrifugal force of the vane does not act on the inner wall of the housing, it is possible to fundamentally eliminate the friction loss generated at the vane tip.

In addition, the leakage occurring in the gap between the vane tip and the inner wall of the housing can be prevented by the sliding tip seal, thereby maximizing the efficiency of the vane rotary compressor.

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

Figure 2 is a side cross-sectional view showing a rotary compressor according to an embodiment of the present invention, Figure 3 is a front sectional view showing a rotary compressor according to an embodiment of the present invention.

As shown in Figures 2 and 3, the compressor according to the present invention is a cylindrical housing 600, a housing cover 610 attached to both bottom surfaces of the housing 600, the interior of the housing 600 A cylindrical rotor 200 installed between the housing cover 610 and penetrating the inside of the rotor, the center of which corresponds to the housing, and a vane compliance means seat provided on the outer diameter surface of the rotor. 231, the vane compliance means 230, which is inserted into the vane compliance means seat and has a vane slot 232 in the center thereof, is fixedly fastened integrally to the drive shaft, rotates together with the drive shaft, and the body is inserted into the vane slot. Losing vane 220, the sliding tip chamber 221 mounted on the sliding tip chamber groove 222 provided in the vane tip portion 220b, the vane compliance means seat is shorter than the vane compliance means seat Vane compliance means cover 260 for filling the remaining portion from the bottom of both sides, the rotor cover 250 is attached to the bottom of both sides of the rotor to connect the reinforcement of the rotor outer peripheral surface opened due to the vane compliance means seat 231 ), The suction pipe 300 and the suction port 310 for supplying gas to the inside of the housing, the annular diaphragm 620 for preventing leakage between the housing and the housing cover at both ends of the outer diameter of the rotor, the inside of the housing The discharge passage 410 and the discharge tube 400 for discharging the compressed air, the discharge valve 420 provided between the discharge port and the discharge tube, the gas passage between the housing and the rotor at the beginning of the discharge port inlet gradually becomes narrower Discharge groove 440 to prevent falling.

At this time, the housing 600 as a constituting the body of the present invention includes a cylindrical shape inside.

Housing covers 610 are attached to both bottom surfaces of the housing 600, and a drive shaft 210 is installed on the housing cover 610 through a drive shaft support bearing 640, and one side of the drive shaft 210 is a drive shaft passage hole. It penetrates the housing cover through 613.

A cylindrical rotor is installed between the housing and the drive shaft, but the center of the rotor is eccentrically spaced apart from the center of the housing by a predetermined distance. The rotor is supported by a rotor support bearing 630 installed on a housing or a housing cover at both sides of its outer circumference to allow free rotation.

A sealed space is formed by the housing inner diameter surface 600a, the outer diameter surface of the rotor 200a, and the vane 220 and the lower housing cover 610 on both sides of the housing, and the rotor support bearing 630 provided at both ends of the outer diameter surface of the rotor is formed. As shown in FIG. 3, an annular diaphragm 620 is disposed between the housing and the housing cover at both ends of the outer diameter surface of the rotor to prevent leakage from occurring.

As shown in FIG. 4, the vane compliance means 230 is inserted into the vane compliance means seat 231 provided on the outer circumferential surface of the cylindrical rotor.

The vane 220 is inserted into the vane adapting means so that the vane 220 slides into the vane slot 232 cut in a predetermined depth and width in the longitudinal direction.

At this time, if the axial length of the vane compliance means seat 231 is made to match the axial length of the vane 220, the length of the vane compliance means seat becomes shorter than the length of the vane slot 232. Insert the vane compliance means cover 260 to fill the space left at the bottom of both ends of the compliance means seat.

In addition, the rotor cover 250 is covered with the rotor cover 250 on both bottom surfaces of the rotor to reinforce the portions cut and opened due to the vane compliance means seat 231 of the rotor outer diameter surface 200a.

The vane is inserted into the vane slot of the vane compliant means to allow the sliding movement, one side is fixed to the drive shaft and the other side is rotated while maintaining a clearance from the inner wall of the housing, the centrifugal force is generated. A counterweight 240 to offset this is attached to the vanes across the drive shaft.

FIG. 5 is an embodiment in which the driving shaft and the vane are integrally coupled and the sliding tip chamber 221 is mounted to the vane tip portion 220b. FIG. 6 is another embodiment in which the driving shaft and the vane are integrally coupled. Is an assembly diagram in which a vane integrally coupled with the drive shaft is installed inside the rotor.

When the drive shaft 210 rotates, the vanes 220 fixed to the drive shaft are rotated together so as to be integral with the drive shaft, and the rotor 200 installed in an eccentric position spaced apart by a predetermined distance from the center of the drive shaft is pushed together by the vane that rotates. It will rotate.

At this time, since the center of rotation of the rotor and the center of rotation of the integrated drive shaft-vane are separated from each other by a predetermined distance, they protrude from the rotor outer diameter surface through the rotor outer diameter surface 200a, the inner diameter surface 600a of the housing and the vane slot 232. The enclosed space surrounded by the vane protrusion 220a is changed in volume according to the rotation angle of the drive shaft.

Gas is introduced into the housing 600 through the suction pipe 300 and the suction port 310, and while the sealed space is in communication with the suction port 310, the gas is introduced into the sealed space through the suction pipe 300. The sealed space becomes the suction chamber 510, and the communication between the sealed space and the suction port 310 is terminated as soon as the vane passes through the end of the suction port, so that the sealed space that constitutes the suction chamber 510 is the compression chamber 520. And the gas inside it begins to be compressed.

Such a sealed space is moved toward the discharge port 410 as the volume of the rotor 200 eccentrically rotated with respect to the housing 600 rotates.

When the drive shaft rotates further to reach the discharge chamber pressure, the discharge valve 420 installed at the discharge port is opened and the compressed gas is discharged through the discharge pipe 400.

At this time, the passage formed between the inner wall of the housing and the outer wall of the rotor becomes narrower in the process of the compressed gas toward the discharge port, so that the narrowest portion 530 immediately before reaching the discharge port is generated. Since the pressure loss is increased to pass the gas through the narrow passage, the discharge groove 440 is formed on the inner wall of the housing to alleviate this.

On the other hand, since the rotation center of the rotor 200 is out of a predetermined distance from the rotation center of the integrated drive shaft-vane, a radial direction is formed between the vane 220 that rotates integrally with the drive shaft and the outer diameter surface of the rotor 200 through which the vane passes. In addition to the relative motion of, tangential motion occurs. The vane compliance means 230 inserted into the vane compliance means seat 231 of the rotor receives this mutual motion so that a collision due to the interference between the vanes and the rotor does not occur.

FIG. 8 sequentially shows a figure in which the vane accommodating means receives the relative motion of the vanes and the rotor according to the rotation angle of the drive shaft and performs the rotational motion without any mutual interference between the vanes and the rotor.

Since the inner surface of the vane compliance means seat 231 and the outer surface of the vane compliance means 230 are in circular contact with each other, they receive tangential movement through relative rotation, and the vane slots 232 and vanes 220 of the vane compliance means are straight. Sliding to receive radial movement.

The driving force transmitted from the drive shaft 210 is transmitted to the vane compliance means 230 through the vanes 220, and this force is also transmitted from the vane compliance means to the rotor 200. Therefore, the vane and the rotor both rotate as the drive shaft rotates.

In this process, since the rotation center of the vane rotating together with the drive shaft coincides with the center of the housing and the center of the drive shaft, the vane tip 220b maintains a constant clearance with the housing inner wall surface 600a. Therefore, the centrifugal force due to the rotation of the vanes does not act at all on the inner wall of the housing, and thus friction loss between the vane tip and the inner wall of the housing does not occur. Instead, the centrifugal force of the vanes is offset by counterweights attached to the other side of the vanes across the drive shaft.

On the other hand, leakage occurring in the gap between the vane tip portion 220b and the housing inner wall surface 600a can be prevented by the sliding tip chamber 221 mounted to the sliding tip chamber groove 222 provided in the vane tip portion 220b.

The vane rotary compressor according to the present invention can be used in a refrigerant compressor for automobile air conditioners and various industrial fields.

1 is a side cross-sectional view showing an embodiment of a vane rotary compressor according to the prior art.

Figure 2 is a side cross-sectional view showing a rotary compressor according to an embodiment of the present invention.

Figure 3 is a front sectional view showing a rotary compressor according to an embodiment of the present invention.

Figure 4 is a perspective view showing a rotor, vane compliance means, rotor cover in the rotary compressor according to an embodiment of the present invention.

FIG. 5 is a perspective view illustrating a vane having a sliding tip chamber and integrally coupled with a driving shaft in a rotary compressor according to an embodiment of the present invention.

6 is a perspective view illustrating a coupling relationship between vanes and a drive shaft in a rotary compressor according to another embodiment of the present invention.

FIG. 7 is a perspective view illustrating a coupling relationship of a vane integrally coupled with a rotor, a vane adapting means, and a drive shaft in a rotary compressor according to an embodiment of the present invention.

FIG. 8 is a view illustrating a structure for solving mutual interference due to relative movement of a rotor and a vane by means of vane adaptation means according to a driving shaft rotation angle in a rotary compressor according to an embodiment of the present invention.

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

200: rotor

200a: outer diameter of rotor

210: drive shaft

211: vane tightening screw

220: vane

220a: vane protrusion

220b: vane tip

221: sliding tip thread

222: sliding tip seal groove

230: vane acclimatization means

231 vane acclimatization seat

232: vane slot

240: counterweight

250: rotor cover

251: rotor cover tightening screw

260: vane compliance cover

300: suction pipe

310 inlet

400: discharge pipe

410 outlet

420: discharge valve

430: discharge room

440: discharge groove

510: suction room

520: compression chamber

530: discharge entrance

600: housing

600a: housing inner wall

610: housing cover

613: drive shaft through hole

620: annular diaphragm

630: rotor support bearing

640: drive shaft bearing

Claims (2)

Cylindrical housing, A housing cover attached to both bottom surfaces of the housing, A cylindrical rotor installed eccentrically with the housing center between the housing covers in the housing, A drive shaft installed inside the rotor and centered with the housing, Counterweight attached to one side of the vane across the drive shaft to offset the centrifugal force, A vane protruding through the outer diameter surface of the rotor to approach the inner wall of the housing to form a closed space; A suction pipe for supplying gas to the inside of the housing and a discharge pipe for discharging the compressed gas inside the housing; Vane compliance means for receiving the interference due to the relative movement of the vane and the rotor when the vane passes through the outer diameter surface of the rotor, A vane compliance means seat provided on the outer peripheral surface of the rotor to allow the vane compliance means to receive a relative rotational movement with the outer peripheral surface of the rotor, A vane slot installed to have a predetermined length and width at the center portion of the vane adapting means so that the vane conforming means receives the sliding movement of the vane; A discharge groove provided on an inner wall surface of the housing provided for securing a sufficient flow path immediately before reaching the discharge hole when the gas compressed inside the housing flows toward the discharge hole; A discharge valve for discharging the gas compressed inside the housing to reach a predetermined pressure; The vane, one side of the vane rotary compressor, characterized in that the one connected to the drive shaft is integrally rotated with the drive shaft and the other side is integrally connected with the drive shaft to maintain a gap of the housing surface and a predetermined distance. The method of claim 1, It is inserted into the sliding tip seal groove provided at the tip of the vane which is integrally rotated with the drive shaft, and it slides toward the inner wall of the housing during the rotation of the vane to prevent leakage from the gap between the vane tip and the inner wall of the housing. The vane rotary compressor further comprises a sliding tip chamber to perform.

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