JPS59201993A - Stationary vane type compressor - Google Patents

Abstract

PURPOSE:To prevent burning by providing a coating layer for suppressing inverted rotation against the eccentric shaft section of roller on one sliding face at the sliding section between the roller and eccentric shaft section thereby reducing friction at the sliding section. CONSTITUTION:An eccentric shaft section 9a of a drive shaft 9 and a roller 7 to be fitted over said shaft section 9a are placed in the bore 3 of cylinder 4 while a vane 10 sliding against the outercircumferential face of roller 7 is held by the cylinder 4 to constitute a stationary vane type compressor. In such a compressor, coating layers 15, 16, 17 for suppressing the inverted rotation against the eccentric shaft section 9a of roller 7 are formed on one sliding section between the eccentric shaft section 9a and roller 7. Consequently the speed of inverted rotation of roller 7 can be reduced considerably to reduce the sliding speed between the roller 7 and heads 5, 6 and the top of vane 10 resulting in reduction of friction at the sliding section.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stationary vane compressor. Specifically, it includes a cylinder, front and rear heads,
An eccentric shaft portion of a drive shaft and a roller that fits into the shaft portion are installed in the bore of the cylinder, and a vane that slides on the outer peripheral surface of the roller is held in the cylinder. The present invention relates to a stationary vane compressor that compresses gas by eccentrically rotating the inside of the bore as it rotates.

In this type of compressor, as described above, the roller eccentrically rotates within the bore in accordance with the drive/drawing rotation φK, which is described separately. Not only that, but also the roller is caused by the frictional force at the sliding contact between the inner circumferential surface of the roller and the outer circumferential surface of the eccentric shaft described in 1iij. It also performs a self-rotation motion that follows the eccentric shaft portion. J111 rotation of this roller (1'3'
l spirit interlocking) is a scale that is unnecessary for the pressure part action (, this JI [1 The rotation speed of the slave rotation is large j, then 1)
The sliding contact speed in the vertical direction of the roller and the sliding contact portions with each of the heads and the sliding contact portion between the outer circumferential surface of the roller and the top of the vane increases unnecessarily, as a result. The frictional force at each of the JiYI joints increases, resulting in seizure or a problem in which the coefficient of performance is lowered due to power loss.

Therefore, as described in Japanese Patent Application Laid-Open No. 57-49 []84, as shown in Fig. 6, in this type of compressor); Oil supply passages (59) and (60) are formed to communicate with the roller (57) and [] 1J Eccentric shaft section. Supply lubricating oil to the sliding contact portion with each shaft 6), and then apply the following order at the bracket contact portion? 24 force, thereby suppressing the follow-up rotation (interlocking rotation) of the roller (57).

However, as described above, the roller (57) and the eccentric shaft (
The follow-up rotation of the roller (57) cannot be sufficiently suppressed by simply supplying the lubricant 11 to the sliding contact portion with the roller (57) and the front and rear heads (52), (53). ) and the top of the vane, the sliding contact speed is still high, and therefore the friction at these sliding parts is also large, causing problems such as seizure and a decrease in the coefficient of performance. It was.

In addition, (51) is a cylinder, and (54) is a cylinder (51).
It's a bore inside.

The present invention has been invented in view of the above-mentioned conventional problem, and an object thereof is to attach the iiJ eccentric shaft of the roller to one sliding surface of the sliding contact portion between the roller t>iJ and the eccentric shaft. By forming a coating layer that suppresses follow-up rotation with respect to the
It crawler with each head and the top of the vane (iv:
I's' in contact i4<: Reduces friction, prevents seizure, and improves the coefficient.

In order to achieve the first objective, the present invention is equipped with a cylinder and a front and rear head, and an eccentric shaft portion of a drive shaft and a roller that fits into the shaft portion are installed in the bore of the cylinder. , in a stationary vane type compressor having a vane in sliding contact with the outer 111 surface of a roller 1j in the cylinder, one of an eccentric member tS1≦ and a bar 1≦ in sliding contact with the roller, 1□, 1
Forming a coating layer that suppresses follow-up rotation with respect to each shaft part,
1) Significantly lower the following rotation speed of the roller,
By doing so, the sliding contact speed between the roller and the valley head and the top of the vane is reduced, and
This made it possible to reduce at.

Here, to explain the embodiments, the second aspect of the invention is that in the first aspect of the invention, 1) a coating layer is also formed on each of the four sides of the bores of the front and rear heads of item 1J; The l'jN force at the sliding contact portion with the roller (!: n'J) is made to be more convex and downward.

In addition, the invention of item 6 provides that, in the inventions of items 1 and 2, the rollers are fitted together (a coating layer is formed in the outer circumferential direction of the J16 center axis, and the self-IJ roller and the MJ reporter drive are connected to each other). Similarly, in the invention of Item 1 or 2 JA, the invention of Item 4 is designed to reduce the frictional force at the sliding part with the eccentric shaft. Form a layer to be covered with r
The sliding contact portion between the FJ roller and each of the above heads)! j'i
This was done to reduce the m-force.

An embodiment of the present invention will be described below with reference to one drawing.

The one shown in Fig. 1 is a stationary vane type compressor, in which a compression element (2) for compressing refrigerant is installed below a hermetic casing (1), and a compression element (2) is installed above it. It is equipped with a motor (M) that supplies power.

The compression element (2) is provided with a front head (5) and a catcher head (6) at the upper and lower portions of a cylinder (4) having a bore (6) therein. ) is equipped with a roller (7).

In addition, a retracting force (not shown) is formed in the cylinder (4) marked 01, and a vane (10) is provided in the sliding sea, and this vane (10) is retracted. (not shown) urges the roller (7) to be in constant contact with the roller (7), and the vane (10) forces the bore (6) into suction 1-, I (1
There is a low-pressure chamber (3a) with 1) and a commercial-pressure silkworm (not shown) with a discharge (-1) (see Figure 1).

Moreover, the drive shaft (9) of the motor (M) is press-fitted into the stator (8) 1i! , i is fixed.

Then, the drive shaft (9) is connected to each of the heads (5), (
6) and the cylinder (4), respectively, and the rad (5)
), (6) are supported by the bearings (5a) and (6a), and the eccentric shaft portion (
9a) is inserted into the roller (7) in the bore (6).

Further, (12) is a suction pipe that communicates with the suction 0 (11) and guides low-pressure refrigerant into the compressor, and (16) is a suction pipe for discharging high-pressure refrigerant gas from inside the casing (1) to the outside of the machine. It is a discharge pipe.

In this way, the eccentric rotation of the roller (7) accompanying the drive of the motor (M) causes the low pressure refrigerant to flow into the suction pipe (Mij).
12) At the same time, the refrigerant is sucked into the low pressure chamber (6a) of the bore (6) through the suction port (11), and at the same time compresses the refrigerant in the high pressure chamber in the bore (filter) to a predetermined pressure and discharges the refrigerant from the discharge port into the cylinder (4). ) and is further discharged outside the machine via a muffler (14) and a discharge pipe (13).

'In addition, (19) is the bottom part I of the casing (1) in iii.
This communicates with the Wl+ reservoir (18) provided, and connects to the drive shaft (noted separately).
9) 1llin for each sliding part? In the oil supply passage that supplies tt oil, the FiiJ low roller and eccentric shaft part (9a)
It is also possible to supply lubricating oil to the sliding contact area.

In the iiJ compressor configured as above, as shown in FIG. and each coating layer (15).

(16,) and (17) are formed.

i'+: The layers (15) to (17) to be visited in J are suitable as long as they have a low thickness coefficient (and good abrasion resistance), but fluorine Km IJ6 is a suitable one. be.

To explain the case where fluororesin is used for hIJ coating layers (15) to (17), first, tetrafluoroethylene 11
(abbreviated as PTFE) and tetrafluoroethylene co-bodies, for example, tetrafluoroethylene-l\\
Hexafluoropropylene co-locking combination (hereinafter abbreviated as p), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (hereinafter abbreviated as PF'A)
, ethylene-tetrafluoroethylene copolymer (ET
Polyphenylene sulfide (Pps), polyether sulfo:/(PES
), polyamideimide (PA engineering), and polyimide (
A coating composition was prepared which is characterized by containing at least one selected from resins such as P. Then, this composition was written as Mjj (self iJ of the drive shaft (9)).
The outer peripheral surface of the eccentric shaft portion (9a), each of the heads (5), (
6) Each facing surface to the bore (6) is painted by air spray, etc., then dried by infrared rays, and further heated at 280℃ to 3℃.
The coating layers (15) to (17) are baked at 80'C.
) respectively. In addition, the film thickness is 20~
7o"4shio, preferably 40i5.==.

In addition, to describe in detail an example of the above-mentioned coating material, 400 parts of methyl isobutyl ketone (organic medium), 70 parts of PTFE powder (Luburon L-5 manufactured by Daikin Industries), and an FEP aqueous dispersion (polymer-containing Jik 50% by weight) were added. Daikin Industries Neofron Dispershore ND-1)]
Dispersing the mixture with 60 parts and further removing water,
A pale yellow semi-bright organosol containing 25.3% by weight of PTFE-FEP with a composition of PTFE/p'E, P = 7/3 was obtained. 200 parts of this mixed organosol and polyamideimide w11'a A
180 parts of
1 part and 1 part of monomer titanium FR-22 (manufactured by Titan Industries) are cross-wired and filtered.

The operation of this embodiment configured as follows will be explained.

First, the compression action of the compressor described in No. 01j will be briefly explained again.

+ji The roller (7) accompanying the drive of the motor (M)
), the discharge pressure refrigerant is transferred to the suction pipe (12),
11 (juice chamber) of the bore (6) through the suction port (11).
At the same time, the refrigerant in the pressure regulating chamber in the bore (filter) is brought up to a predetermined pressure and discharged from the discharge port to the outside of the cylinder (4), and then the muffler (14), It is discharged outside the machine via the discharge pipe (1 filter).

As described above, since the coating layer (15) having a coefficient of friction of 1.gamma. The friction of the sliding contact portion with the eccentric shaft portion (9a) can be significantly reduced compared to the conventional method.For this reason, the following rotation of the roller (7) (11δ) with respect to the central shaft portion (9a), The misalignment can suppress the rotational movement of the roller (7) to a greater degree than in the past, and therefore the upper and lower surfaces of the roller (7), the front and rear heads (5),
The speed of sliding contact between the bore (6) and the facing surface of the groove (6) can be made significantly smaller than that of conventional bearings.

As a result, mJ roller (7) and each head (5),
(6) The frictional force between the compressor and the compressor can be reduced, power loss can be reduced, seizure can be prevented, and the coefficient of performance of the compressor can also be improved.

Moreover, since the 30-second rotation of the roller (7) can be suppressed,
The speed of sliding contact between the roller (7) and the vane (1o) can also be reduced, and therefore the wear of the vane (10) can also be reduced.

Furthermore, the front and rear heads (5).

Since the coating layers (16) and (17) with a low coefficient of friction are formed opposite to the bore (6) of the cylinder (4) of C6), the respective heads (5) and (6) and the IJ- This allows the frictional force due to the sliding contact with La (7) to be further discharged.

Moreover, the base remaining in the cylinder (4) of No. 11J is
Garbage such as N (10)'s treaded-out costume has been reported to various reporters of NIJ (
5), (6) and the iJ roller (7), the dirt will immediately be removed from each of the heads (5), (6).
Because it gets stuck in the covered layers (16) and (17) of
Is the INu force of the sliding contact part unusually large?
There is no risk of burn-in. To explain in detail, the conventional head without a coating layer has the above-mentioned heads (
5) The dust that has entered the sliding contact area between (6) and the roller (7) rolls in the sliding contact area, and in the process, the dust comrades with each other and becomes large in diameter, and the dirt enters the sliding contact area. (However, in this example, the dirt that entered the sliding contact area was immediately removed from the iJ reporter covering layer (16 m). ), (17), so there is no possibility that it will roll, become large in diameter, and bite into the sliding contact portion, increasing the frictional force.

In the above embodiment, among the sliding contact portions between the eccentric shaft portion (9a) and the roller (7), the eccentric shaft portion (9a) marked MiJ is
Although the coating layer (15) is formed on the outer peripheral surface of the roller (7), it goes without saying that similar effects can be obtained by forming a coating layer on the inner peripheral surface of the roller (7).

Incidentally, in any case, the coating layer formed on the first contact portion of the RiJ marking is the b! The sliding contact d1 of one of the 2 S+≦ materials constituting the 1 contact part has a good misalignment in formation, and when the X pieces of the above-mentioned camphor are formed on the sliding contact surfaces of both of the 2 members, the coating layers will not adhere to each other. It's not good that it happens again.

As described above (according to the present invention), the cylinder (4) and the front and rear heads (5), (6) are provided, the bore (6) of the cylinder (4) is 1, and the drive shaft (9) is eccentric. Shaft (
9a) and a roller (7) that is fitted to the shaft (9a), and the roller (7) is fitted to the cylinder (4).
In the stationary vane compressor which holds a bee 7 (10) that is rubbed on the outer peripheral surface of the eccentric shaft part (7), the eccentric shaft part (
Since the mixed layer (15) that suppresses the rotation of the roller (7) following the eccentricity (#h part (9a)) is formed on one of the sliding contact parts between the roller (9a) and the roller (7), the JIA compliance Rotation can be significantly suppressed compared to conventional methods, and therefore tjiJ
the front and rear heads (5) of the low crawler;
(6) and Ji for the top of the vane! The f contact velocity can also be reduced. As a result, 6iJ roller (7)
1' at the sliding contact part between and each Dij head (5), (6)
5'=kA can be reduced, seizure can be prevented, and the coefficient of performance of the compressor can be improved.

Furthermore, since the follow-up rotation of the roller (7) can be suppressed, wear on the tip of the plate 7 (10) that comes into sliding contact with the roller (7) can also be reduced.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view showing the main parts thereof, and FIG. 6 is an enlarged cross-sectional view of the main parts of a conventional example. (3)...Bore (4)...Cylinder (5)...Front head (6)...Rear head (7)...Roller (9)...Drive shaft (9a)... Eccentric shaft portion (10)... Vane (15), (16L (17)... Coating layer agent Patent attorney Tsu 1) Naohisa Figure 3

Claims (1)

[Claims] (1) Cylinder (4) and front and rear heads (
5), (6), and a bore (6) of the cylinder (4).
), the eccentric shaft portion (9a) of the drive shaft (9) and the shaft portion (9a
), and the stationary vane type compressor is equipped with a roller (7) that fits into the cylinder (4) and a vane (10) that slides into contact with the outer peripheral surface of the roller (7). Eccentric shaft portion (9a) and roller (7
), a coating layer (15) that suppresses the following rotation of the roller (7) with respect to the eccentric shaft portion (9a).
A stationary vane type compressor characterized by forming. (2) Front head (5) and rear head (6)
The surface of the cylinder (4) facing the bore (6) is coated with
・Claim 1 forming (16) and (17)
The stationary vane compressor described in Section 1. (6) The stationary vane compressor according to claim 1 or 2, wherein a coating layer is formed on the outer peripheral surface of the eccentric shaft portion (9a) into which the roller (7) is fitted. (4) The stationary vane compressor according to claim 1 or 2, wherein a coating layer is formed on the inner circumferential surface of the roller (7) that fits into the eccentric shaft (9a).