JPH11182475A - Rotary compressor and vane therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate excessive initial abrasion to prevent the early deterioration of compressor performance by lapping a sliding part of a vane so as to form only a polishing mesh in the sliding direction of the vane. SOLUTION: Only a polishing mesh 2a in the sliding direction with a rotor outer peripheral surface of a rotary compressor is formed in a range of sufficiently covering a sliding part with at least the rotor outer peripheral surface, for example, a range of about 1/3 to 1/2 of a thickness of a vane 1 over the whole width of the vane 1 on a sliding curved surface 2 of the vane 1 used in a rotary compressor. At this time, surface roughness in the direction orthogonal to the polishing mesh 2a of a part forming the polishing mesh 2a is extremely accurately finished in less than Ra 0.16 μm. Therefore, the early deterioration of compressor performance can be prevented by eliminating excessive initial abrasion by irregularity of the directionality of the polishing mesh since only the polishing mesh in the sliding direction of the vane 1 can be formed in at least a sliding part of a sliding curved surface 1, a sliding plane 3 and a sliding end surface 4 of the vane 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary compressor, and more particularly, to the directionality of polished eyes formed on a lap finish of a sliding curved surface, a sliding flat surface and a sliding end surface of a vane used in a rotary compressor. About.

[0002]

2. Description of the Related Art In a conventional non-rotating vane type rotary compressor in which a vane is inserted into and out of a vane groove of a fixed cylinder, for example, a vane used in the rotary compressor slides on an outer peripheral surface of a rotor. Lapping of a moving curved sliding surface is performed by pressing a vane sandwiched between vane holders of a lapping machine onto sandpaper and swinging the vane holder in an arc shape to perform lapping. Further, the flat sliding surface and the sliding end face of the vane, which are inserted into the fixed cylinder and slide with the vane groove, are, for example,
As disclosed in Japanese Patent Application No. 8-316133, a sliding surface of a vane is pressed by a pressing cylinder onto sandpaper stuck on a surface plate, and the vane is slid by a traveling cylinder actuator to be wrapped. .

[0003]

However, since the vane used in the conventional rotary compressor is wrapped without specifying the direction of the polishing grain, the sliding curved surface, the sliding flat surface, and the sliding surface are not particularly specified. The polished stitch formed on the end face has irregularities in the vertical and horizontal directions with respect to the sliding direction of the vane. For this reason, for example, in the vane of the vane non-rotating rotary compressor described above, until this abrasive grain is worn out,
In particular, there is a problem that excessive initial wear is generated between the outer peripheral surface of the rotor and the vane groove of the fixed cylinder due to the polishing line perpendicular to the sliding direction, and the performance of the compressor is deteriorated early. In particular, when the vane has a ceramic coating layer having a surface hardness of Hv1000 or more, the wear is remarkable.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and is intended to prevent excessive initial wear caused by irregularities in the direction of polished lines on the curved curved surface, the sliding flat surface and the sliding end surface of the vane. It is an object of the present invention to provide a rotary compressor and a vane for use in the compressor, which can eliminate compressor performance and prevent early deterioration of the compressor performance.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vane for a rotary compressor according to the present invention has a sliding curved surface, a sliding flat surface, and at least a sliding portion of a sliding end surface of the vane. The rotary compressor of the present invention is provided with the vanes so that only the polishing stitches along the moving direction are formed. This vane has a surface hardness of H
It is desirable to be v1000 or more.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a rotary compressor and a vane according to the present invention will be described in detail with reference to FIGS. FIG. 1 shows a vane 1 used in a vane non-rotating rotary compressor 40 in which a vane as shown in FIG.
The vane 1 has a curved sliding surface 2 that slides on the outer peripheral surface of the rotor 45 of the rotary compressor 40, a planar sliding surface 3 and a sliding end surface 4 that slides on the vane groove 46 of the fixed cylinder 41. Has a surface hardness of Hv1 due to ion plating.
800 chromium nitride layers are coated, and only the polishing lines 2a, 3a, 4a along the sliding direction of the vane 1 are formed. Therefore, it is wrapped as follows.

The sliding curved surface 2 of the vane 1 is wrapped by, for example, a lapping machine 10 as shown in FIG.
The lapping machine 10 has a guide 11 having a curved surface, and a supply reel 16 and a take-up reel 17
It is arranged on both sides of. Tape-shaped water-resistant sandpaper 1
3 is stuck between the supply reel 16 and the take-up reel 17 via a plurality of guide rollers 12. A vane holder 14 for holding the vane 1 is provided.
4 is fixed to the disk 15. The disk 15 is operated by a crank mechanism (not shown) and rotates about a swing shaft 15a. That is, the vane holder 14 swings up and down as shown by the arrow in FIG. Vane 1 to Vane Holder 14
At right angles to the swing direction. The vane holder 14 is automatically swung to wrap the sliding curved surface 2.

Accordingly, the sliding curved surface 2 of the vane 1 has
As shown in FIG. 1, only the polishing line 2 a along the sliding direction with the rotor outer peripheral surface of the rotary compressor covers the entire width of the vane 1 and sufficiently covers at least the sliding portion with the rotor outer peripheral surface, for example, , About 1/3 to 1/2 of the thickness of the vane 1. As a result, the surface roughness in the direction orthogonal to the polishing line 2a of the portion where the polishing line 2a is formed is Ra
It can be finished with extremely high accuracy of 0.16 μm or less. The surface roughness is desirably Ra 0.16 μm or less, preferably Ra 0.10 μm or less.

Next, the sliding plane 3 and the sliding end face 4 of the vane 1 are lapped by, for example, a lapping machine 20 as shown in FIG. In the vane wrapping machine 20, a long platen 22 is horizontally fixed to a base 21. The supply reel 23 and the take-up reel 26 are disposed on the base 21, respectively, on the right and left sides of the platen 22 in the drawing. Tape-like water-resistant sandpaper 30 is provided between guide reels 24, 25, 27, 28, between supply reel 23 and take-up reel 26.
It winds through 29 and adheres on the surface plate 22.

The two guide shafts 31 and 32 are horizontally fixed to the base 21 above the surface plate 22. A travel cylinder actuator 33 that operates by air pressure is fixed to the base 21 between the guide shafts 31 and 32. A jig holder 34 with a slide block that runs parallel to the surface plate 22 using the guide shafts 31 and 32 as a guide is provided. The traveling cylinder actuator 33 is mounted on the jig holder 3.
4 is reciprocated along the guide shafts 31 and 32. A jig 35 for wrapping the sliding plane 3 of the vane 1 or a jig 35a for wrapping the sliding end face 4 can be selectively attached to the jig holder 34. As shown in FIG. 4, the jig 35 includes a guide plate 36 for setting the vane 1 and a pressing cylinder 37 which is operated by air pressure and presses the vane 1 against the sandpaper 30. Vane holder 3
8 As shown in FIG. 5, the jig 35a is also
Similarly to the above, it has a guide plate 36a, a pressing cylinder 37a, and a vane holder 38a.

The lapping machine 20 is operated as follows to lap the sliding plane 3 and the sliding end face 4. A jig 35 shown in FIG. 4 is attached to the jig holder 34 when the sliding plane 3 of the vane 1 is wrapped, and a jig 35a shown in FIG. As shown in FIG. 4 or FIG. 5, the vane 1 is pressed against the guide plate 36 or 36a with the sliding curved surface 2 on the left side in the drawing, and the pressing cylinder 37 or 37a is moved down to cause the vane 1 to move.
Is fixed. Bolt 39 of vane holder 38 or 38a
Or 39a is tightened and the vane 1 is fixed to the jig 35 or 35.
a.

A timer (not shown) is set to a predetermined polishing time. Thereby, air pressure is applied to the pressing cylinder 37 or 37a, and the pressing cylinder 37 or 37a
To the sandpaper 30 side. The traveling cylinder actuator 33 connects the jig holder 34 to the guide shaft 31,
The sliding plane 3 or the sliding end face 4 of the vane 1 is wrapped by pushing a predetermined width L from the right side to the left side in FIG. When the jig holder 34 moves by the predetermined width L, the air pressure of the pressing cylinder 37 or 37a is released, and the pressing force of the vane 1 on the sandpaper 30 is released. The traveling cylinder actuator 33 moves the jig holder 34 from the left side to the right side along the guide shafts 31 and 32 to return to the original position.

As described above, the lapping machine 20 wraps the sliding plane 3 or the sliding end face 4 of the vane 1 only when the jig holder 34 is pushed from right to left in the drawing. That is, the sliding flat surface 3 and the sliding end surface 4 are wrapped in one direction only from the sliding curved surface 2 side. The above operation is repeated until a predetermined polishing time has elapsed. When a predetermined polishing time has elapsed, the jig holder 34 stops running. Once the vane 1 is removed from the jig 35 or 35a, the pressing cylinder 3
7 or 37a is raised. Pressing cylinder 37 or 37
When a rises, the take-up reel 26 takes up the sandpaper 30 by a length corresponding to the predetermined width L.

The opposite surfaces of the sliding plane 3 and the sliding end face 4 are wrapped in the same manner as described above. Thus, only the polishing lines 3a and 4a along the sliding direction of the vane 1 are formed on the entire sliding plane 3 and the sliding end face 4. As a result, the surface roughness of the sliding surface 3 in the direction perpendicular to the polishing line 3a and the surface roughness of the sliding surface 4 in the direction perpendicular to the polishing line 4a are both extremely accurate to Ra 0.08 μm or less. Finished. The surface roughness of each of the sliding planes 3 and 4 is R
a is desirably 0.2 μm or less, preferably,
Ra is 0.1 μm or less.

As shown in FIG. 6, the vane 1 is mounted on a vane non-rotating rotary compressor 40. A crank mechanism 4 of a rotary shaft 43 is provided in a cylindrical fixed cylinder 41.
The rotor 45 which carries out planetary movement by 4 is provided. The fixed cylinder 41 is provided with a vane groove 46 penetrating in the radial direction. The vane 1 is inserted into the vane groove 46 so as to be able to enter and exit,
The vane 1 is urged toward the center by a spring 42 so that the sliding curved surface 2 of the vane 1 abuts on the outer peripheral surface of the rotor 45. The rotary compressor 40 uses the vane 1 to move the suction chamber 47 and the discharge chamber 4
8 is divided.

The rotation of the shaft 43 causes the rotor 45 to perform a planetary motion to roll the fixed cylinder 41 and
Is reciprocally slid in the vane groove 46. Thereby, the gas is sucked from the suction port, is pressurized through the suction chamber 47 and the discharge chamber 48, and is discharged from the discharge port. At this time,
The sliding curved surface 2 of the vane 1 slides on the outer peripheral surface of the rotor 45,
The sliding plane 3 and the sliding end face 4 slide with the vane groove 46 of the fixed cylinder 41. Conventionally, the vane 1 of the rotary compressor 40 is provided with only the grinding line along the sliding direction of the vane 1 at least in the sliding portion between the sliding curved surface, the sliding plane, and the sliding end surface of the vane 1. The outer peripheral surface of the rotor 45 and the fixed cylinder 4 generated by the polishing line perpendicular to the sliding direction.
No excessive initial wear between the first vane groove 46 and
An early decline in compressor performance can be prevented.

The wrapping of the present invention is particularly suitable for Hv100
It is effective for vanes having zero or more hardened layers or coating layers, and is also effective for vanes 1 having nitrided layers. The rotary compressor and the vane according to the present invention can also be applied to a vane rotary type rotary compressor in which a vane is inserted into a vane groove of a rotor so as to be able to enter and exit, and a vane used therefor. In this case, the sliding curved surface that slides on the inner peripheral surface of the cylinder and the sliding plane that slides on the vane groove of the rotor are provided with the polishing surface of the vane 1 used in the vane non-rotating compressor. Lapping is performed so that only the same polishing line as in 2a and 3a is formed. However, as for the sliding end surface that slides on the end surface of the cylinder, since the vane slides while rotating with respect to the cylinder, only the polishing line having a direction perpendicular to the polishing line 4a of the vane 1 is formed. Wrap it.

[0018]

As described above in detail, the rotary compressor and the vane according to the present invention provide at least the sliding curved surface, the sliding flat surface and the sliding end surface of the vane in the sliding direction of the vane. Since the lapping is performed so that only the polished lines are formed, it is possible to eliminate the excessive initial wear due to the irregular direction of the polished lines of the vane, and to prevent the early deterioration of the compressor performance. It has the effect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a vane for a rotary compressor according to the present invention.

FIG. 2 is a view showing a main part of a lapping machine for a sliding curved surface.

FIG. 3 is a view showing a main part of a lapping machine for a sliding plane and a sliding end face.

FIG. 4 is a view showing details of a jig for a sliding plane in FIG. 3;

FIG. 5 is a view showing details of a jig for a sliding end face in FIG. 3;

FIG. 6 is a sectional view showing a rotary compressor according to the present invention.

[Explanation of symbols]

1 vane, 2 sliding curved surface, 2a polished eye, 3 sliding plane, 3a polished eye, 4 sliding end surface, 4a polished eye, 10
Lap finishing machine, 11 guides, 12 guide rollers,
13 sandpaper, 14 vane holder, 15 disk, 15a swing shaft, 16 supply reel, 17 take-up reel, 20 lap finishing machine, 21 base, 22 platen, 23 supply reel, 24, 25 guide roller, 2
6 take-up reels, 27, 28, 29 guide rollers,
30 Sandpaper, 31, 32 Guide shaft, 3
3 Traveling cylinder actuator, 34 jig holder,
35, 35a jig, 36, 36a guide plate, 37, 3
7a pressing cylinder, 38, 38a vane holder, 3
9, 39a bolt, 40 rotary compressor, 41 fixed cylinder, 42 spring, 43 shaft, 44 crank mechanism, 45 rotor, 46 vane groove, 47 suction chamber, 4
8 Discharge chamber

Claims (4)

[Claims] 1. A sliding surface (2a, 2a, 2a, 2b, 2c) of at least a sliding portion of a sliding curved surface (2), a sliding flat surface (3), and a sliding end surface (4) of a vane (1). 3a, 4a)
A vane for a rotary compressor, wherein the vane is wrapped so as to form only a whirlpool. 2. The vane (1) has a surface hardness of Hv1.
The vane for a rotary compressor according to claim 1, wherein the vane is at least 000. 3. A rotary compressor provided with a vane (1), wherein at least a sliding portion of a sliding curved surface (2), a sliding flat surface (3) and a sliding end surface (4) of the vane slides on the vane. A rotary compressor characterized in that lapping is performed so that only polishing lines (2a, 3a, 4a) along the moving direction are formed. 4. The vane (1) has a surface hardness of Hv1.
The rotary compressor according to claim 3, wherein the number is not less than 000.