JP2010106802A - Vane rotary compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vane rotary compressor capable of suppressing vibration without affecting a clearance between a rear side block and a shaft. <P>SOLUTION: A vane rotary compressor 1 includes: a bottomed tubular case 2 having an opening on one end; a front head 3 fixed on a side of the opening of the case 2; and a compression mechanism unit 5 which is housed in the case 2, a front part of which is supported by the front head 3, and which rotates with a transmitted rotary drive force and compresses gas. A support member 6 press-fitted and fixed in an inner circumference of the case 2 is fixed on a rear part side of the compression mechanism unit 5. The support member 6 serves as a gas-liquid separator 6 supported in the case 2 on the rear part side of the compression mechanism unit 5 and separating oil in the compressed gas from the gas. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vane rotary compressor used in a vehicle air conditioner and the like.

  3-4 shows the vane rotary compressor 100 used for the vehicle air conditioner. As shown in FIG. 3, the vane rotary compressor 100 includes a bottomed cylindrical case 2, a front head 3 fixed to the opening 2 a on one side of the case 2, and a compression mechanism accommodated in the case 2. And a gas-liquid separator 6.

  The compression mechanism 5 is formed by a cylinder block 11, a cylinder housing 7 including a rear side block 12 and a front side block 13 on both sides of the cylinder block 11, and a rotor 8 provided in the cylinder block 11. The rotor 8 is integrally provided with a shaft 9. The rear side of the shaft 9 is supported by the rear side block 12 and the front side is supported by the front side block 13. The rotor 8 is rotated in the cylinder block 11 by rotating the shaft 9 with the rotational driving force transmitted from the engine.

  A cylinder chamber 15 is formed inside the cylinder block 11, the rear side block 12, and the front side block 13, and the rotor 8 is rotatably accommodated in the cylinder chamber 15. As shown in FIG. 4, the inner surface of the cylinder chamber 15 is an elliptical inner wall 15a. A plurality of vane grooves 8a are formed in the rotor 8 along the circumferential direction, and one end side of the vane 16 is slidably inserted into each vane groove 8a. The other end side of each vane 16 is extracted from the vane groove 8a, contacts the elliptical inner wall 15a, and slides on the elliptical inner wall 15a. The plurality of vanes 16 divide the inside of the cylinder chamber 15 to form a refrigerant compression chamber.

  The gas-liquid separation device 6 is accommodated in the case 2 so as to be located on the rear side of the rear side block 12. The gas-liquid separation device 6 separates oil from the refrigerant sucked from the suction port 17 of the front head 3 by the rotation of the rotor 8, and the refrigerant subjected to the separation process with the oil is the discharge port 18 of the case 2. It is discharged from.

  In such a vane rotary compressor 100, the compression mechanism unit 5 includes a cylinder block 11 on one side that is cantilevered by a bolt (not shown) on the front head 3 via the front side block 13. The rear side block 12 is supported on the inner wall of the case 2 by a seal ring 20 made of an O-ring.

  However, since the compression mechanism 5 is cantilevered by bolts, it is difficult to suppress vibration due to rotation of the rotor 8 (shaft 9), and there is a problem that abnormal noise is generated during operation.

For this reason, conventionally, it has been proposed to fix the rear side block 12 to the case 2 by press-fitting the rear side block 12 of the compression mechanism portion 5 into the inner periphery of the case 2 (see, for example, Patent Document 1). . As a result, both ends of the shaft 9 can be supported by the bolts and the rear side block 12, so that vibration can be suppressed.
JP 2001-304158 A

  However, in the structure in which the rear side block 12 is press-fitted and fixed to the inner periphery of the case 2 and the compression mechanism 5 is directly supported on the case 2 as in Patent Document 1, the shaft 9 and the rear side block 12 are displaced from the set position. easy. When this deviation occurs, the clearance between the rear side block 12 and the shaft 9 is affected, so that the rotation of the shaft 9 is hindered.

  Therefore, an object of the present invention is to provide a vane rotary compressor that can suppress vibration without affecting the clearance between the rear side block 12 and the shaft 9.

  According to the first aspect of the present invention, a bottomed cylindrical case having one side opened, a front head fixed to the opening side of the case, and a front side of the front head that is housed in the case. A vane rotary compressor provided with a compression mechanism that compresses gas by rotating with a supported rotational driving force, and is press-fitted and fixed to the inner periphery of the case on the rear side of the compression mechanism. The support member is fixed.

According to a second aspect of the invention, an invention of claim 1, wherein the compression mechanism includes a CFCs DOO side block, a rear side block, a cylinder block provided between these two side blocks, cylinder block And a rotor which is rotatably accommodated in a cylinder chamber formed by the front side block and the rear side block, and is driven to rotate, and the support member is fixed to the rear side block.

  Invention of Claim 3 is invention of Claim 1 or 2, Comprising: The said support member isolate | separates the oil in the gas compressed by being supported by the rear part side of the said compression mechanism part in the said case It is the gas-liquid separator which performs.

  The invention according to claim 4 is the invention according to claim 3, wherein the gas-liquid separator is formed by a separator body and a flange portion fixed to the rear side block, and an outer peripheral end of the flange portion. Further, a press-fitting portion that is press-fitted and fixed to the inner periphery of the case is formed.

  According to the present invention, the support member is fixed to the compression mechanism portion, and the support member is press-fitted and fixed to the inner periphery of the case to support the compression mechanism portion, and the compression mechanism portion is supported via the support member. Therefore, it is not necessary to directly support the compression mechanism portion on the case. For this reason, since the shaft and the rear side block can be reliably arranged at the set position, and the clearance between the rear side block and the shaft can be secured, the shaft rotates smoothly. In addition, since the shaft can be supported at both ends, vibration of the shaft can be suppressed.

  Hereinafter, the present invention will be described in detail with reference to embodiments illustrated in the drawings. FIG. 1 is a cross-sectional view and a partial enlarged cross-sectional view showing an entire vane rotary compressor 1 according to an embodiment of the present invention, and FIG. 2 is a side view of a gas-liquid separation device 6 used in this embodiment. In this embodiment, the same members as those shown in FIGS. 3 and 4 are given the same reference numerals and correspond to each other.

  The vane rotary compressor 1 according to this embodiment includes a case 2, a front head 3, a compression mechanism unit 5, and a gas-liquid separation device 6.

  The case 2 has a bottomed cylindrical shape whose rear side is sealed by the bottom wall 2b, and the compression mechanism portion 5 and the gas-liquid separation device 6 are accommodated in the internal accommodating portion 2c. In this case, a refrigerant discharge port 18 is formed in a portion of the case 2 facing the gas-liquid separator 6.

  The front head 3 is fixed to the side of the opening 2 a that is open on the front side of the case 2. The front head 3 is formed with a suction port 17 for sucking the refrigerant into the compression mechanism unit 5.

  The compression mechanism unit 5 includes a cylinder housing 7 and a rotor 8 disposed in the cylinder housing 7. The cylinder housing 7 includes a cylindrical cylinder block 11 and a rear side block 12 and a front side block 13 provided on both front and rear sides of the cylinder block 11. A cylinder chamber 15 is formed inside the cylinder block 11, the rear side block 12, and the front side block 13.

  The rotor 8 is rotatably disposed in the cylinder chamber 15. The rotor 8 is integrally provided with a shaft 9. The shaft 9 is rotatable through the rear side block 12, the cylinder block 11, and the front side block 13 with the rear side supported by the rear side block 12 and the front side supported by the front side block 13. When the rotational driving force from the engine is transmitted to the shaft 9, the rotor 8 rotates in the cylinder chamber 15.

  A plurality of vane grooves 8a are formed in the rotor 8 in the circumferential direction, and the vanes 16 are inserted into the respective vane grooves 8a (see FIG. 4). The vane 16 is extracted from the vane groove 8 a, and the extracted end portion is in contact with the elliptical inner wall 15 a of the cylinder chamber 15. When the plurality of vanes 16 come into contact with the elliptical inner wall 15a, the inside of the cylinder chamber 15 is divided into a plurality of refrigerant compression chambers.

  In the compression mechanism section 5, the front head 3 and the cylinder block 11 are fastened by bolts (not shown) via the front side block 13 fitted in the front head 3, whereby the cylinder block 11 is moved to the front head. 3 is cantilevered. In the rear side block 12, a seal ring 20 made of an O-ring is fitted between the inner wall of the case 2 so that the block 12 is supported by the case 2 (see an enlarged view of the portion E in FIG. 1). .

  In the above structure, the refrigerant is sucked from the suction port 17 provided in the front head 3 and supplied to the compression chamber in the cylinder chamber 15 of the cylinder block 11. The refrigerant is compressed by gradually narrowing the compression chamber as the rotor 8 rotates. After being compressed in the compression chamber, the refrigerant is introduced into the gas-liquid separator 6, and after the oil is separated in the gas-liquid separator 6, the refrigerant is discharged from the discharge port 18 into the refrigeration cycle.

  The oil separated from the refrigerant by the gas-liquid separator 6 falls into the housing part 2c of the case 2, and then the oil path 22 formed in the rear side block 12, the oil path 23 formed in the cylinder block 11, and the front side block The oil is lubricated by flowing between the shaft 9 and the blocks 11, 12, and 13 through the oil passage 24 formed in 13.

  The gas-liquid separation device 6 includes a separator body 31 that separates the refrigerant and the oil, and a flange portion 33 that supports the separator body 31 inside while surrounding the separator body 31. . A plurality of bolt holes 35 are formed in the flange portion 33. The flange portion 33, that is, the gas-liquid separation device 6 is fixed to the rear side block 12 by fastening the flange portion 33 to the rear side block 12 with a bolt (not shown).

  As shown in FIG. 2, a press-fit portion 34 that is convex and protrudes outward is formed on the outer peripheral side of the flange portion 33. The press-fit portions 34 are formed at three equal positions in the circumferential direction. For this reason, the press-fit portions 34 are formed at three locations on the outer peripheral side of the flange portion 33. The press-fitting part 34 is press-fitted into the inner periphery 2d of the case 2 (see the F part enlarged view in FIG. 1). Thereby, the flange part 33, that is, the gas-liquid separator 6 is fixed to the case 2.

  Thus, the gas-liquid separator 6 is fixed to the case 2 by press-fitting the press-fit portion 34 into the inner periphery 2 d of the case 2, while the rear side block 12 is connected via the boss portion 35 of the gas-liquid separator 6. By being connected to the gas-liquid separator 6, the rear side block 12 is fixed to the case 2 via the gas-liquid separator 6. In such a structure, the gas-liquid separator 6 serves as a support member that fixes the rear side block 12, that is, the compression mechanism 5 to the case 2, and the compression mechanism 5 is supported by the case 2 via the gas-liquid separator 6. Therefore, it is not necessary to directly support the compression mechanism 5 on the case 2. That is, it is not necessary to press the rear side block 12 into the inner periphery of the case 2 and support it. For this reason, the shaft 9 and the rear side block 12 can be reliably arranged at the set position, a clearance between the rear side block 12 and the shaft 9 can be secured, and the shaft 9 can be smoothly rotated. .

  In such a structure, as a member for supporting the compression mechanism portion 5 on the case 2, the gas-liquid separation device 6 that has been conventionally incorporated in the vane rotary compressor is used, so that the dedicated mechanism for supporting the compression mechanism portion 5 is used. This member becomes unnecessary. Therefore, the number of parts does not increase, and the compressor 1 does not increase in size or increase in weight.

  In addition, since the compression mechanism unit 5 is supported on the front side by bolts and the rear side is supported by the gas-liquid separator 6, the shaft 9 is supported on both ends, thereby suppressing vibration of the shaft 9.

  Furthermore, in this embodiment, since the press-fit portions 34 are provided at three locations in the circumferential direction, vibrations in all directions can be suppressed.

  The present invention is not limited to the above embodiments, and various modifications can be made. For example, the support member fixed to the compression mechanism unit 5 may be a member press-fitted into the case, and may be a member other than the gas-liquid separation device 6 such as a plate. Further, the press-fitting portions 35 of the gas-liquid separation device 6 that are press-fitted into the inner periphery of the case 2 are not limited to three places, and can be appropriately formed in appropriate places.

1 is an overall cross-sectional view, an E-part enlarged cross-sectional view, and an F-part enlarged cross-sectional view of an embodiment of the present invention. It is a side view which shows a gas-liquid separator. It is a whole sectional view of the conventional vane rotary compressor. It is sectional drawing which shows the rotor rotation part in a vane rotary compressor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vane rotary compressor 2 Case 2a Opening 5 Compression mechanism part 6 Gas-liquid separator 7 Cylinder housing 8 Rotor 9 Shaft 11 Cylinder block 12 Rear side block 13 Front side block 31 Separator main body 33 Flange part 34 Press-fit part

Claims (4)

A bottomed cylindrical case (2) opened on one side, a front head (3) fixed to the opening (2a) side of the case (2), and accommodated in the case (2) A vane rotary compressor (1) comprising a compression mechanism (5) that compresses gas by rotating with a rotational driving force supported and transmitted to the front head (3),
A vane rotary compressor (1), wherein a support member (6) that is press-fitted and fixed to the inner periphery of the case (2) is fixed to the rear side of the compression mechanism section (5). A vane rotary compressor (1) according to claim 1,
The compression mechanism (5) includes a front side block (13), a rear side block (12), a cylinder block (11) provided between these side blocks (13, 12), and a cylinder block (11 ) And a rotor (8) rotatably accommodated in a cylinder chamber (15) formed by the front side block (13) and the rear side block (12),
The vane rotary compressor (1), wherein the support member (6) is fixed to the rear side block (12). The vane rotary compressor (1) according to claim 1 or 2,
The support member (6) is a gas-liquid separation device (6) that separates oil in gas compressed and supported on the rear side of the compressor mechanism (5) in the case. Characteristic vane rotary compressor (1). A vane rotary compressor (1) according to claim 3,
The gas-liquid separator (6) is formed by a separator body (31) and a flange portion (33) fixed to the rear side block (12), and the case is formed at the outer peripheral end of the flange portion (33). (2) A vane rotary compressor (1) characterized in that a press-fitting portion (34) to be press-fitted and fixed to the inner periphery is formed.

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