JPH02108889A - Rotary compressor - Google Patents

Abstract

PURPOSE:To absorb almost all of rotational vibration generated so as to lower the vibration considerably by supporting a pump main body elastically in a closed case and connecting the inlet opening part of a compression mechanism part and a suction pipe with a metal bellows. CONSTITUTION:An elasticity holding device 25 for supporting a pump main body 22 elastically in a closed case 1 is formed of a spring holder 26 fixed at the closed case 1 and a spring 27 with its one end fixed at the spring holder 26 and the other end fixed at a fixed case 24. A suction pipe 28 is fixedly welded to the closed case 1 such as to communicate the inside of the closed case 1 to its outside. In a metal bellows 29, its one end is connected to the suction pipe 28 and the other end of the inlet opening part 11 of a compression mechanism part 23. In such a constitution, almost all of the rotational vibration generated at the compression mechanism part 23 of the pump main body 22 is absorbed and damped at the elasticity holding device 25 and the metal bellows 29, so that the slightest vibration is transmitted to the closed case 1.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a rotary compressor used in refrigeration equipment such as refrigerator-freezers.

BACKGROUND OF THE INVENTION In recent years, rotary compressors have become increasingly popular in refrigeration equipment such as refrigerator-freezers.

A conventional rotary compressor, such as a vertical rotary compressor, will be described below as an example.

FIG. 2 shows a conventional vertical rotary compressor.

In FIG. 2, 1 is a sealed case, 2 is a motor section, and 3 is a crankshaft which is press-fitted and fixed to the motor section 2 so as to be driven. A roller 4 is rotatably arranged on the circumference of the eccentric portion 6 of the crankshaft 3. A cylinder 6 is welded and fixed to the sealed case. A vane 7 is in contact with the outer circumference of the roller 4. Reference numeral 8 denotes a side housing on the side of the electric motor section 2, which has a shallow refrigerant discharge groove 1o. Reference numeral 11 denotes a suction opening, which is installed inside the cylinder 6. Reference numeral 12 denotes an oil supply pipe which is press-fitted and fixed to one end of the crankshaft. , 13 is a suction pipe that communicates between the inside and outside of the sealed case 71, and one end of which is connected to the suction opening 11 of the cylinder 6.
It is press-fitted and fixed.

In the above configuration, the crankshaft 3 is connected to the electric motor section 2.
When the roller 4 is driven and rotated by the eccentric part 50, the roller 4 arranged on the circumference of the eccentric part 50 rolls along the inner wall of the cylinder 6, and the vane 7 in contact with the outer periphery of the roller 4 moves against the cylinder 6.
Compression is possible by partitioning the compression chamber formed into a high pressure side and a low pressure side.

Problem to be Solved by the Invention However, in the conventional configuration described above, when the rotary compressor is operated, the cylinder 6 is pulled in the rotational direction due to the compression load applied to the vane 7, causing rotational vibration. directly from the side housing 8 on the motor part 2 side,
Since the vibration was transmitted to the closed case 1, there was a problem in that the vibration of the rotary compressor became large.

The present invention solves the above-mentioned conventional problems and provides a rotary compressor with low vibration. .

Means for Solving the Problem In order to achieve this object, the rotary compressor of the present invention has the following features:
A sealed case, a pump body in which an electric motor section and a compression mechanism part are integrally fixed to a fixed case, an elastic support device that elastically supports the pump body within the sealed case, and an elastic support device that communicates between the inside and outside of the sealed case. The compressor has a welded suction pipe, and the suction opening of the compression mechanism section and the suction pipe are connected by a metal bellows.

Operation According to the above-described configuration of the present invention, most of the rotational vibrations generated in the compression mechanism during operation of the rotary compressor are absorbed by the elastic support device and the metal bellows.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings regarding a vertical rotary compressor. Note that parts that are the same as those in the conventional example will be described using the same reference numerals, and parts that have the same operations will be omitted.

In FIG. 1, 21 is a vertical rotary compressor. 22
is a pump body in which a compression mechanism section 23 and an electric motor section 2 are integrally fixed to a fixed case 24.

Reference numeral 1 denotes a sealed case that airtightly covers the entire pump body 22. 25 connects the pump body 22 to the sealed case 1
A spring holder 26 is fixed to the closed case 1 by an elastic support device that elastically supports the spring 27 at one end and the fixed case 24, respectively. Reference numeral 28 is a suction pipe which is welded and fixed to the sealed case 1 so as to communicate between the inside and outside of the sealed case 1. A metal bellows 29 has one end connected to the suction pipe 28 and the other end connected to the suction opening 11 of the compression mechanism section 23.
This is due to being connected to.

In the above configuration, most of the rotational vibration generated in the compression mechanism section 23 of the pump body 22 is absorbed and attenuated by the elastic support device 26 and the metal bellows 29, so that extremely slight vibration is generated in the sealed case 1. It just gets passed on.

Effect of the invention This can be realized by a rotary compressor.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a vertical rotary compressor according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional vertical rotary compressor. 1... Sealed case, 2... Electric motor section,
22...Pump body, 23...-Compression mechanism section, 24...Fixed case, 25...Elastic support device, 26...Spring holder, 27・・・
... Spring, 28 ... Suction pipe, 29.
−・・・Metal bellows. Name of agent: Patent attorney Shigetaka Awano and one other person The pump body, an elastic support device that elastically supports the pump body within the sealed case, and a suction pipe welded so as to communicate between the inside and outside of the sealed case. By providing a configuration in which the suction opening of the compression-like structure and the suction pipe are connected by a metal bellows, most of the rotational vibrations generated in the compression mechanism of the pump body are absorbed. Extremely low vibration 1-! vI'7-Su 2-11 Denkan I part 2z-Bonfu m main body 23-Ima 4 old machine' 1 part 24-Rinding booth 25-Ballistic support 1 24--Suf #Lingebolder 2q-Food edition split pork loin

Claims (1)

[Claims] A pump body in which the inside of the sealed case, an electric motor section and a compression mechanism part are integrally fixed to a fixed case, an elastic support device that elastically supports the pump body in the sealed case, and the inside and outside of the sealed case are communicated. What is claimed is: 1. A rotary compressor comprising: a suction pipe welded to the rotary compressor; and a suction opening of the compression mechanism section and the suction pipe are connected by a metal bellows.