JPS60237190A - Rotary type compressor - Google Patents

Abstract

PURPOSE:To keep the airtightness at the intake side and the discharge side, reduce the sliding resistance between a vane and a cylinder, and improve the compression efficiency and the reliability of a product by using a hollow and lightweight vane made by powder metallurgy, cold forging, hot forging, mechanical machining, etc. CONSTITUTION:A wholly closed hollow vane is produced by binding two machined parts by sintering, welding, soldering, etc. Such a vane 3 is lightweight, and it can follow the rotation of a roller 4 in contact with the vane 3 even during the high-speed rotation of a motor. Accordingly, it has the excellent characteristic in keeping the airtightness and for the abrasion of a cylinder 6 in contact with the vane 3, and it can largely contribute to improving the efficiency of the compression work and the reliability of a product.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention has been made to improve the above-mentioned drawbacks.The center of the vane is made hollow to reduce the weight and provide high performance and high efficiency rotary compression. The aim is to provide the opportunity.

[Background of the invention]

Rotary compressor vanes are required to have sealing properties and sliding properties on the high and low pressure sides on all sides except the spring presser side, and require precision machining and the use of wear-resistant materials. be done.

Taking these backgrounds into consideration, the present invention has developed an internal hollow vane by making full use of powder metallurgy technology, cold forging technology, hot forging technology, machining technology, etc. without impairing the required characteristics. I discovered something that could be done to make it lighter.

[Purpose of the invention]

The present invention relates to a vane that shields the suction side and discharge side of a rotary compressor, and particularly provides a lightweight vane that maintains its function even when the motor rotates at high speed.

[Summary of the invention]

As shown in Figure 1, the vanes of conventional rotary compressors are made from plate material by cutting or machining, and because of their high mass, they are pushed up during compression by the rotation of rollers, and back pressure is created during suction. (discharge pressure) and the presser spring force when pushing back the vane, the inertia force of the vane increases. Therefore, when the motor is running at high speed, the vanes have to follow the rotation of the rollers, which impairs the airtightness between the suction and discharge sides, reducing the efficiency of compression work, the sliding friction between the rollers and the vanes, and the amount of time required to push the vanes up. A major drawback was that all work losses were caused by the large mass.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to FIGS. 2, 3, and 4. It is possible to manufacture it as a whole using gold, cold forging, hot forging, etc. with an opening on the back side. , 3, 4 show an example of a completely closed hollow vane, which can be manufactured by joining two processed parts using techniques such as sintering, welding, and brazing. Since these vanes are lightweight, they can follow the rotation of the roller in contact with the vanes even when the motor rotates at high speed. Cross-sectional diagram of a low-j IJ-type compressor 1 To explain it, 3 is a vane that moves up and down, 4 is a rotating roller, 5 is a rotating shaft, 6 is a cylinder, 7 is a spring, 8 is a suction port, Reference numeral 9 indicates a discharge port. Suction gas flows in from the suction port 8, is compressed in the space between the roller 4, cylinder 6, and vane 3 by the eccentric rotation of the rotating shaft 5 and the roller 4, and is then discharged from the discharge port 9. The structure is such that each part exhibits frictional sliding behavior with the adjacent parts. Among these friction fingers, when it comes to the high speed rotation region of the motor, 1. The high mass of the vanes makes impactful contact with the eccentrically rotating rollers, creating a gap between the vanes and the rollers, resulting in problems such as loss of airtightness between the suction and discharge sides, vane push-up work, and sliding friction resistance. However, by using the vane of the present invention, the defects caused by mechanical loss can be greatly improved.

〔Effect of the invention〕

airtightness on the suction and discharge sides.
This has the effect of reducing the sliding resistance of the cylinder, which greatly contributes to improving the efficiency of compression work and improving the reliability of the product.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional rotary compressor vane, Figs. 2, 3, and 4 are perspective views of a hollow body vane according to the present invention, and Fig. 5 is a cross section of a rotary compressor sliding part. It is a diagram. 1...Hollow part, 2...Joint part, 3...Vane, 4
...Roller, 5...Rotating shaft, 6...Cylinder,
7...Spring, 8...Suction port, 9...Discharge port. Agent Patent Attorney Akio Takahashi

Claims (1)

[Claims] Through powder metallurgy, cold forging, hot forging, machining, etc.
A rotary compressor that uses lightweight vanes with internal hollows.