JPS6341691A - Vane type compressor - Google Patents

Abstract

PURPOSE:To prevent the generation of wear and seizing at the time of driving a compressor by forming a vane and a rotor with an Si-Al alloy and differentiating the contents of Si by 3 % or more between both. CONSTITUTION:A light-weight Si-Al alloy material (casting material) with a 20-% Si is used as the forming material of the vane 12 of a vane type compressor, and a lighter Si-Al alloy material (casting material) with a 12-% Si is used as the forming material of a rotor 10. Thus, by differentiating the contents of Si by 3% or more between the vane 12 and the rotor 10, the diameter and the form of the Si particle become different between the two. Thereby, a shock between both members is absorbed or idly rotated reducing the mutual striking power to the other side particles and, thereby, improving the limits of the wear resistance and seizing resistance of the vane 12 and the rotor 10. Also, the vane 12 and the rotor 10 which are formed with the light Si-Al make the vane type compressor light-weight.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a vane-type compressor, and in particular relates to a combination of materials for the rotor and vanes, which reduces the weight while preventing wear and burning. Regarding things that aim to.

(Prior art) A vane type compressor has vanes that protrude from the outer circumferential surface of the rotor toward the inner surface of the cylinder block, partitions a roughly elliptical cylinder chamber so that its volume can be changed, and controls the gas within the partitioned area. It is known that it compresses

In recent years, vane type compressors have been proposed that use aluminum materials (mainly Si-A I alloy) to reduce their weight, as shown in Japanese Patent Application Laid-Open No. 89991/1983. .

(Problems to be Solved by the Invention) However, aluminum material has poor wear resistance and burnout resistance, and there is a problem in using aluminum material as the material for the rotor and vanes.

In other words, the vane is a member that repeatedly moves in and out along the vane groove attached to the rotor, and when aluminum is used for the vane and rotor, wear occurs on the vane and rotor (specifically, the vane groove). The compressed fluid that presses and biases the bottom surface of the vane leaks into the cylinder chamber through the gap created by wear, impairing the biasing ability. In addition, vanes and rotors made of aluminum may seize, resulting in a situation where the vanes cannot move in and out.

(Means for Solving the Problems) The present invention employs the following technical means to solve the problems mentioned in -4-.

That is, the vane type compressor of the present invention is an air-conditioning compressor for an automobile, and includes at least a rotor and a vane.
i-AI alloy, and the st content of the rotor and vane was made to differ by 3% or more.

The reason why the difference in Si content is set as 3% or less is that if the difference in Si content is less than 3%, wear and seizure will occur during rubbing (during compressor operation). Based on the following knowledge.

(Background of the invention) The phenomenon of wear and seizure 4 occurs when two materials rub against each other, and the wear resistance and seizure resistance change when the combination of materials changes. It is generally known.

Therefore, the present inventor combined Si-Al alloy materials with different Si contents and measured the seizure load using a Falex seizure test.

More specifically, as shown in FIG. 3, a pin 30 is made of negative material 1, a block with a 7-shaped groove is made of another material, and while the pin 30 is rotated, the block 3 is
1 was pressed together and the load at which seizure occurred was measured. The test results are shown below along with the test conditions.

In addition, the seizure load P is calculated by setting the angle of the 7-shaped groove to 906 and block 3.
If the force applied to 1 is F, then P = F / 2 J
It is represented by 2. Further, the practical seizure load limit is 280 kg.

(Leaving space below) Test result table (Note) (Casting) Cast material (push) Powder extrusion material (*) Test conditions Test machine: Falex seizure test machine Pin rotation speed: 0, 39 m/sec Lubricating oil :5UNISO-5GS (Product name: Nippon Sun Oil Co., Ltd.) Oil temperature: 80"C Load application method Two-step up method From the test result table above, in the case of tests ■ to ■ where the same materials are rubbed against each other, "The firing load is extremely small and the Si content is less than 3%."A test in which two people made sliding contact between dissimilar materials■
It can be seen that in the case of ~ [phase], the seizure load becomes extremely large (seizure resistance is achieved).

This means that if the contained Si particles have the same size and shape, the impact they receive from each other will be strong, and as a result, the particles will break. Si
It is understood that if the particle diameters and particle shapes differ to some extent, the impact is absorbed or idly rotated, the mutual attack force against the other particles is weakened, and the limits of wear resistance and burn resistance are increased.

The present invention was completed based on the findings based on the test results.

(Function) According to the technical means described in 1-, 5t-Al formed in a vane shape
Since there is a difference of 3% or more between the Si content of the alloy and the Si content of the St gold alloy that forms the rotor, large wear and seizure will not occur in the sliding area between the vane and rotor. As a result, lightweight Si-A1 alloy materials can be used in combination.

(Example) The present invention will be explained below based on embodiments shown in the drawings.

FIG. 1 is a longitudinal sectional view of a compressor showing an embodiment of the present invention, and FIG. 2 is a sectional view taken along line A-A in FIG.

Pressure l? ! The main body 1 of the compressor is composed of a front side block 3a and a rear side block 3b fixed to the front and rear sides of a cylinder block 2, and a cylinder chamber 4 is formed in the compressor main body 1.

The guide surface 5 of the cylinder chamber 4 has an oval shape or a shape close to this.

The drive shaft 6 is fitted into a bearing hole 8 formed in a bearing portion 7 of the front side block 3a, and movement in the thrust direction is regulated by a bearing 9 interposed between the collar portion 6a and the bearing portion 7. Thus, the shaft 6 is rotatably supported by the compressor main body 1.

Further, a cylindrical rotor 10 arranged in the cylinder chamber 4 is fixed to the drive shaft 6, and for example, four vane grooves 11 are formed at equal intervals on the circumferential surface of the rotor 10.
A vane 12 is slidably inserted into the vane groove 11.

This vane 12 is urged toward the tip by back pressure from a back pressure chamber 13 provided below the vane groove 11, and slides along the guide surface 5 of the cylinder chamber 4, causing the adjacent vane 12 to
The compression chamber 14 formed by the gap is configured to expand and contract.

The suction hole 15 and the discharge hole 16 are formed in each cylinder block 2, are arranged at positions facing each other, and open into the compression chamber 14.

・On the other hand, the compressor main body l is connected to the front side block 3.
It is surrounded by a head 18 closely fixed to a and a casing 19 closely fixed to the head 18. A low pressure chamber 20 is formed between the head 18 and the front side block 3a, and the low pressure chamber 20 communicates with the suction hole 15 and the suction port 21. Further, a high pressure chamber 22 is formed in the casing 19, and the high pressure chamber 22 communicates with the discharge hole 16 and the discharge port 23, and the lower part of the high pressure chamber 22 is an oil reservoir 24.

This oil reservoir 24 and the bearing hole 8 of the front side block 3a communicate through an oil supply hole 25, and the high pressure chamber 2
2 is configured to supply oil to the gap between the drive shaft 6 and the bearing hole 8.

A part of the oil supplied to the gap between the drive shaft 6 and the bearing hole 8 flows into the seal chamber 26, and is further supplied to the cylinder chamber 4 through the oil supply hole 27 formed in the front side block 3a. It is used to lubricate the gap between the front side block 3a and the rotor 10, the guide surface 5, etc.

A relatively lightweight 20% Si-Al alloy material (casting material) is also used as the material for forming the bipedal vane 12.
A lighter 12% Si-Al alloy material (casting material) is used as the material for forming the cylinder block 2, and a 16% Si-A 1 alloy material (powder extrusion material) is used as the material for forming the cylinder block 2. There is. Therefore, the compressor of the present invention is considerably lightweight as a whole. The compressor of the present invention is incorporated into an automobile (not shown) for use in air conditioning, and during this use, troubles due to wear and seizure do not occur for a long period of time.

Note that the Si content rates described in the examples are not necessarily limited to those mentioned above, and the Si content rates may be varied by 3% or more.

(Effects of the Invention) As explained below-1, according to the present invention, the rotor and vanes are made of lightweight Si-A1 alloy material, so the compressor can be made lightweight. Moreover, since the S+ content of the materials forming the rotor and vanes differs by 3% or more, wear and seizure are less likely to occur in the vane grooves, resulting in compressed air leaks and vanes not being able to slide. This has the effect of preventing troubles and extending the life of the compressor.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is an explanatory diagram of a Falex test. 10... Rotor 12... Vane Patent Applicant Diesel Kiki Co., Ltd. Agent Patent Attorney Masa Mori Procedural Amendment, White) 1985 5 JJ l S 1988 Patent Application No. 187084 2 Invention Name Vane type compressor 3 Relationship with weight of person making the correction Patent applicant address 3-6-7 Shibuya, Shibuya-ku, Tokyo Name (:
133) Chisel Kikai Co., Ltd. Representative Yukio Itagaki 4 Agent 164 Telephone (03): 173-95
10 Address No. 1, 2-9-10 Honmachi, Nakano-ku, Tokyo
LA and No. 21A will be canceled as shown in the attached drawings.

Claims (1)

[Claims] A vane type compressor for air conditioning of an automobile, characterized in that at least a rotor and a vane are formed of a Si-Al alloy, and the Si content of the rotor and vane forming materials is different by 3% or more. mold compressor.