JP2014234724A - Vane rotary compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vane rotary compressor in which the peeling and falling of a lubricative coating film from a side block can be prevented in a region which does not undergo surface-roughing treatment for improving the adhesion of the side block and the lubricative coating film.SOLUTION: A vane rotary compressor 1 includes a housing 2, and a compression mechanism 3 housed in the housing 2. The compression mechanism 3 includes a cylinder block 9 having cylinder chambers 11 at its internal peripheral side, a pair of side blocks 17 which are arranged so as to sandwich the cylinder block 9, and a rotor 25 which is rotatably supported in an internal peripheral periphery of the cylinder block 9. Lubricative coating film 23 are formed at abutting faces 19 of the cylinder block 9 sides of the side blocks 17, and the lubricant membrane 23 formed at the abutting faces 19 in which the side blocks 17 and the cylinder block 9 are abut on each other is made thicker in thickness than that of a region which opposes the cylinder chambers 11 of the side blocks 17.

Description

  The present invention relates to a vane rotary compressor, and more particularly to a vane rotary compressor that fixes a cylinder block and a side block.

  Conventionally, as shown in Patent Document 1, a general vane rotary compressor includes a head portion having an intake chamber, a compressor main body portion that introduces and compresses gas before compression from the intake chamber, and the compressor main body portion. It consists of a rear part having a discharge chamber for storing compressed and discharged gas.

  The compressor main body includes a cylinder chamber formed in the cylinder block and having an end surface surrounded by a side block. The rotor is rotatably accommodated in the cylinder chamber, and both end surfaces of the rotor and the cylinder chambers of both side blocks are accommodated. The opposing surface slides.

  On the sliding surface where the both end surfaces of the rotor and the cylinder chamber facing surfaces of both side blocks slide, either one of the sliding surfaces is coated with a lubricating film such as polytetrafluoroethylene. Conventionally, measures have been taken to improve the wear resistance and seizure resistance by facing the sliding surface of the counterpart aluminum alloy.

  In addition, a roughening treatment is applied to the sliding surface in advance so that the lubricating coating coated on the sliding surface does not peel off the sliding surface, and the lubricating coating and the sliding surface are firmly adhered to each other. Yes.

Japanese Patent Laying-Open No. 2003-211084

  However, in the vane rotary compressor as shown in Patent Document 1, there is a concern that the lubricating coating may be peeled off or dropped out from a region other than the sliding surface.

  That is, the sliding surface is roughened so that the lubricating film does not peel off from the sliding surface, but the rough surface is not provided on the cylinder chamber facing surface of both side blocks in the area other than the sliding surface. There was a possibility that the lubricating coating was peeled off and dropped from the cylinder chamber facing surface of both side blocks in the region other than the sliding surface before the cylinder block and both side blocks were assembled.

  In addition, when the coating of the lubricating coating is peeled off from the cylinder chamber facing surfaces of both side blocks, the refrigerant leaks from the location where the lubricating coating on the holding surface of the cylinder block and the side block is peeled off and dropped off. was there.

  Therefore, the present invention is a vane rotary compression capable of preventing the peeling and dropping of the lubricating coating from the side block in the region not subjected to the roughening treatment for improving the adhesion between the side block and the lubricating coating. The purpose is to provide a machine.

  In order to solve the above problems, the present invention is a vane rotary compressor 1 including a housing 2 and a compression mechanism 3 accommodated in the housing 2, wherein the compression mechanism 3 is a cylinder on the inner peripheral side. A cylinder block 9 having a chamber 11; a pair of side blocks 17 arranged so as to sandwich the cylinder block 9; and a rotor 25 rotatably supported on the inner periphery of the cylinder block 9; A lubricant film 23 is formed on the contact surface 19 of the cylinder block 9 on the side of the cylinder block 9, and the lubricant film 23 formed on the contact surface 19 on which the side block 17 and the cylinder block 9 abut is attached to the side surface 17. The lubricating film 23 is made thicker than the region of the block 17 facing the cylinder chamber 11.

  In addition, a surface roughening process is performed on a region of the side block 17 facing the cylinder chamber 11, and a contact surface 19 of the side block 17 that contacts the cylinder block 9 is subjected to a surface roughening process. It is characterized by not being.

  Further, the lubricating coating 23 is characterized in that the thickness of the lubricating coating 23 at the outer peripheral end 21 of the side block 17 is increased.

  In addition, the lubricating coating 23 is a fluororesin.

  In the present invention, a lubricating coating 23 is formed on the surface of the side block 17 on the cylinder block 9 side, and the lubricating coating 23 formed on the abutting surface 19 where the side block 17 and the cylinder block 9 abut is provided with the side block 17. Since the thickness of the lubricating coating 23 is made thicker than the area facing the cylinder chamber 17, the rigidity of the lubricating coating 23 formed on the contact surface 19 of the side block 17 can be increased. It is possible to prevent the film 23 from peeling off from the side block 17 and falling off.

  Further, since the lubricating coating 23 is formed on the contact surface 19 of the side block 17, the lubricating coating 23 also serves as a gasket, and the lubricating coating 23 prevents the gas from leaking. The effect that the sealing performance can be improved can also be obtained.

  Further, the non-contact surface of the side block 17 and the cylinder block 9 is subjected to a roughening process, and the contact surface 19 of the side block 17 that contacts the cylinder block 9 is not subjected to a roughening process. Even in this case, since the lubricating coating 23 formed on the side block 17 is thick, it is possible to prevent the lubricating coating 23 from peeling off from the side block 17 and falling off. In addition, the adhesion between the side block 17 and the lubricating coating 23 can be improved without adding a region to be roughened.

  In addition, the lubricating coating 23 can be manufactured by a simple process such as masking by increasing the thickness of the lubricating coating 23 at the outer peripheral end 21 of the side block 17. Effects similar to the above effects can be obtained.

The whole sectional view of the vane rotary compressor of the present invention. The side view of the cylinder block end surface of a present Example. (A) The side view of the front side block of a present Example, (b) The side view of the front side block which shows a modification. (A) Partially enlarged schematic sectional view of the front side block showing the present embodiment, (b) Partially enlarged schematic sectional view of the front side block showing another modified example, (c) Front side showing another modified example The partial expanded cross-section schematic diagram of a block.

  Hereinafter, embodiments and modifications of the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 1, the vane rotary compressor 1 of this embodiment includes a housing 2, a compression mechanism 3 accommodated in the housing 2, and a power transmission unit 4 that transmits power to the compression mechanism 3. .

  The housing 2 includes a substantially conical front head 5 and a bottomed cylindrical case 7. The substantially conical front head 5 is rotatably supported by a compression mechanism 3 to be described later via a bearing 37.

  The bottomed cylindrical case 7 is open at one end, and the front head 5 is fixedly disposed so as to close the opening. A compression chamber 8 is formed on the inner peripheral side of the case 7, and the compression mechanism 3 is accommodated in the compression chamber 8.

  The compression mechanism 3 accommodated in the housing 2 includes a cylinder block 9 having a cylinder chamber 11 on the inner peripheral side, a pair of side blocks 17 arranged so as to sandwich both ends of the cylinder block 9, and a cylinder block 9 and a rotor 25 rotatably supported in a cylinder chamber 11 formed on the inner periphery of the cylinder 9.

  As shown in FIG. 2, the cylinder block 9 has a cylinder chamber 11 formed on the inner peripheral side and is formed in a substantially O shape. The cylinder chamber 11 formed on the inner peripheral side of the cylinder block 9 is It has an elliptical shape.

  Further, both end surfaces of the cylinder block 9 have a front side end surface 13 and a rear side end surface 15 that come into contact with a side block 17 described later.

  The pair of side blocks 17 arranged so as to sandwich the both end faces of the cylinder block 9 includes a front side block 17a and a rear side block 17b.

  A front-side contact surface 19 (contact surface) is formed on the cylinder block 9 side of the front side block 17a, and a lubricating coating 23 (hereinafter referred to as “fluorine resin 23”) is formed on the front-side contact surface 19. ) Is formed by coating. Although not shown, a rear side contact surface (contact surface) is formed on the cylinder block 9 side of the rear side block 17b.

  The front side end surface 13 of the cylinder block 9 contacts the front side contact surface 19 of the front side block 17a. As shown in FIG. 3A, at the position (non-contact surface) where the cylinder chamber 11 of the front side block 17a faces, the adhesion between the front side end surface 13 of the front side block 17a and the fluororesin 23 is improved. In order to enhance the surface, a roughening process is performed.

  Further, the roughening process is not performed on the region other than the non-contact surface described above.

  The roughening process may be any processing method that roughens the non-contact surface of the front side block 17a, such as a shot blasting process or a laser irradiation process.

  As shown in FIG. 3A, the fluorine resin 23 coated on the front side contact surface 19 of the front side block 17a is formed so that the outer peripheral end 21 of the front side block 17a is thicker than the non-contact surface. doing.

  That is, as shown in FIG. 4A, at the outer peripheral end 21 of the front side block 17a, the thickness of the fluororesin 23 is the thickness h1, and the fluorine at a position facing the cylinder chamber 11 of the front side block 17a. The thickness of the system resin 23 is the thickness h2.

  In FIG. 3A, it has been described that the outer peripheral end 21 of the front side block 17a is thicker than the non-contact surface. However, as shown in FIG. 3B, the cylinder chamber of the front side block 17a. 11 may be made thicker than the non-contact surface except for the region opposite to the region 11.

  The rotor 25 rotatably supported in the cylinder chamber 11 of the cylinder block 9 has a vane groove (not shown). A plate-like vane is accommodated in the vane groove so as to be able to protrude and retract, and the vane protrudes from the vane groove to compress gas between the tip of the vane and the inner wall of the cylinder chamber 11.

  Further, a drive shaft 27 is formed integrally with the rotor 25, and the power transmission unit 4 is connected to the end of the drive shaft 27 on the other end side.

  The power transmission unit 4 connected to the drive shaft 27 includes a pulley 31 that receives a rotational driving force from a power source (such as an engine) (not shown), an armature 33 that transmits the rotational driving force of the pulley 31, and the pulley 31 by magnetic force. A coil 29 that contacts and separates the armature 33, a bolt 35 that connects the armature 33 and the drive shaft 27, and a bearing 37 that is disposed between the front head 5 and the pulley 31 are provided.

  The pulley 31 that receives the rotational driving force from a power source (not shown) rotates, and the pulley 31 and the armature 33 are connected by the magnetic force of the coil 29, whereby the rotational driving force is transmitted to the armature 33. As the armature 33 rotates, the drive shaft 27 connected to the armature 33 rotates and transmits the rotational driving force to the compression mechanism 3.

  In the present embodiment, since the rigidity of the fluororesin 23 formed on the front-side contact surface 19 of the side block 17 can be increased by adopting the above-described configuration, the fluororesin 23 is peeled off from the side block 17. , Can be prevented from falling off.

  Further, since the fluorine-based resin 23 is formed on the front-side contact surface 19 of the side block 17, the fluorine-based resin 23 also serves as a gasket, and the fluorine-based resin 23 prevents the gas from leaking, so that a compression mechanism is provided. 3 can also improve the sealing performance.

  Further, the non-contact surface of the side block 17 and the cylinder block 9 is subjected to a roughening process, and the contact surface 19 of the side block 17 that contacts the cylinder block 9 is not subjected to a roughening process. Even in this case, since the thickness of the fluororesin 23 formed on the side block 17 is increased, it is possible to prevent the fluororesin 23 from peeling off from the side block 17 and falling off. In addition, the adhesion between the side block 17 and the fluororesin 23 can be improved without adding a region to be roughened.

  In addition, since the fluorine resin 23 can be manufactured by a simple process such as masking by increasing the thickness of the fluorine resin 23 at the outer peripheral end 21 of the side block 17, Effects similar to the above effects can be obtained.

  Next, a modified example of the present invention shown in FIGS. 4B and 4C will be described.

  In the modification of the present invention, the shape of the fluororesin 23 coated on the front side contact surface 19 of the front side block 17a is different from that of the above embodiment.

  In the modification shown in FIG. 4B, the thickness h3 of the fluororesin 23 on the outer peripheral end 21 side of the front side block 17a is the thickness of the fluororesin 23 at a position facing the cylinder chamber of the front side block 17a. It is gently inclined toward h4.

  In the modification shown in FIG. 4C, the thickness of the fluorine resin 23 at the outer peripheral end 21 of the front side block 17a is the same as the thickness of the fluorine resin 23 at the position facing the cylinder chamber 11 of the front side block 17a. Although it is the same as h6, it protrudes so that the thickness of the fluorine-type resin 23 may become thickness h5 in the outer peripheral end 21 vicinity of the front side block 17a.

  That is, also in the modified examples shown in FIGS. 4B and 4C, the same effects as in the above-described embodiment can be obtained.

  In this embodiment, the front side contact surface 19 of the front side block 17a is coated with the fluorine resin 23. However, the rear side contact surface of the rear side block 17b is coated with a fluorine resin. Alternatively, both the contact surfaces of the front side block 17a and the rear side block 17b may be coated with a fluorine-based resin.

  Further, in this embodiment, the embodiment using the fluorine-based resin as the lubricating coating has been described. However, other lubricating coating may of course be used. For example, a graphite (graphite) coating, a coating containing soft metal powder such as copper, nickel, lead, tin, or silver may be used.

  In addition, this invention may combine the Example mentioned above and the modification as well as various Examples which are not mentioned above are included.

  The present invention can be used for a vane rotary compressor.

DESCRIPTION OF SYMBOLS 1 Vane rotary compressor 2 Housing 3 Compression mechanism 9 Cylinder block 11 Cylinder chamber 17 Side block 23 Lubricious film (fluorine resin)
25 Rotor

Claims (4)

A vane rotary compressor (1) comprising a housing (2) and a compression mechanism (3) accommodated in the housing (2),
The compression mechanism (3) includes a cylinder block (9) having a cylinder chamber (11) on the inner peripheral side, a pair of side blocks (17) disposed so as to sandwich the cylinder block (9), and a cylinder A rotor (25) rotatably supported on the inner periphery of the block (9),
A lubricating coating (23) is formed on the surface of the side block (17) on the cylinder block (9) side,
The lubricating coating (23) formed on the abutting surface (19) where the side block (17) and the cylinder block (9) abut is opposed to the cylinder chamber (11) of the side block (17). A vane rotary compressor (1) characterized in that the lubricating coating (23) is thicker than the region. A vane rotary compressor (1) according to claim 1,
An area facing the cylinder chamber (11) of the side block (17) is subjected to a roughening treatment,
The vane rotary compressor (1), wherein the abutting surface (19) of the side block (17) that abuts on the cylinder block (9) is not roughened. A vane rotary compressor (1) according to claim 1 or claim 2,
The vane rotary compressor (1), wherein the lubricating coating (23) is formed by increasing the thickness of the lubricating coating (23) at the outer peripheral end (21) of the side block (17). The vane rotary compressor (1) according to any one of claims 1 to 3,
The vane rotary compressor (1), wherein the lubricating coating (23) is a fluororesin (23).

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