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Multi-cylinder rotary compressor

A rotary compressor, multi-cylinder technology, applied in rotary piston/oscillating piston pump components, elastic fluid rotary piston/oscillating piston pump combinations, mechanical equipment, etc., can solve the reduction of piston efficiency , insufficient shaft rigidity, longer shaft length, etc., to achieve the effect of improving rigidity and vibration, improving wear failure and reducing compression efficiency

Active Publication Date: 2016-02-17
GUANGDONG MEIZHI COMPRESSOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In a large-capacity rotary compressor composed of multiple cylinders, not only the compression load on the compression chamber increases, but also the shaft length from the main bearing to the sub-bearing becomes longer, so there is a problem that the shaft rigidity of this part is insufficient
As a result, reduced efficiency due to eccentric shaft wear and incorrect action of the piston

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] see figure 1 , which is the internal structure of the rotary compressor R. In the rotary compressor R, a compression mechanism P and a motor H are arranged in a hermetic casing, and these are fixed to the inner wall of the casing. The first cylinder 13a and the second cylinder 13b of the compression mechanism P are divided by the intermediate plate M.

[0040] see figure 2 , is a detailed view of the compression mechanism P. In the first cylinder 13a and the second cylinder 13b constituting the compression mechanism P, a first piston 16a and a second piston 16b, and a sliding vane (not shown) that reciprocates in synchronization with the same are arranged. An intermediate plate M, consisting of a first plate M1 and a second plate M2, distinguishes these cylinders between the two cylinders.

[0041] The connecting shaft G of the eccentric crankshaft S arranged at the center of the compression mechanism P is a shaft connecting the first eccentric shaft E1 and the sec...

Embodiment 2

[0053] see Figures 9-10 In this embodiment 2, a central groove 45 with an inner diameter of d2 is arranged in the center of the second flat plate M2, and a central hole 44 with an inner diameter of d1 is opened on the outer plane of the central groove 45.

[0054] In Embodiment 2, the inner diameter d3 of the center groove 45 is the inner diameter of the intermediate bearing F, so d2=d3. d2=d1+2e, a thin-walled thrust portion 46 is formed at the bottom of the central groove 45, see Figure 10 . As in Embodiment 1, d2=d3=D1+c. Also, d1=D2+c.

[0055] see Figure 11 , representing the process of inserting the second flat plate M2 into the eccentric crankshaft S to assemble the middle partition plate M. Same as Embodiment 1, when the second flat plate M2 moves upward through the outer circumference of the second eccentric shaft E2, it is as follows: Figure 11 . Furthermore, in order to ensure that the center of the center hole 44 is consistent with the center of the main...

Embodiment 3

[0061] see Figure 13 , this embodiment 3 is composed of one flat plate to form the middle partition plate M, so compared with the embodiment 1 or embodiment 2 in which the middle partition plate M is composed of two flat plates, the processing and assembly with the middle partition plate M are relatively easy The advantage, the disadvantage is that the width or bearing length of the intermediate bearing F will be halved. However, the condition of increasing the width W of the second intermediate shaft G3 is achievable. Furthermore, in Example 3, the outer diameter D1 of the first intermediate shaft G1 and the outer diameter D2 of the second eccentric shaft cannot be different. That is, D1≈D2.

[0062] The remaining unmentioned parts are shown in Example 1, and will not be repeated.

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Abstract

The invention discloses a multi-cylinder rotary type compressor. A motor and a compression mechanism are arranged in sealed shell; the compression mechanism comprises a first cylinder with a first piston, a second cylinder with a second piston and a middle isolation plate positioned between the first cylinder and the second cylinder; an eccentric crank shaft drives the first piston and the second piston to rotate at the same time; a main bearing and an auxiliary bearing which are used for supporting the eccentric crank shaft are respectively arranged on the side face of the first cylinder and the side face of the second cylinder; the eccentric crank shaft comprises a main shaft, a first eccentric shaft connected with the first piston, a second eccentric shaft connected with the second piston and an auxiliary shaft; the first eccentric shaft is connected with the second eccentric shaft through a connection shaft; a middle shaft is arranged in the connection shaft; and a middle bearing for supporting the middle shaft is arranged in the middle isolation plate. The multi-cylinder rotary type compressor is suitable for double-cylinder rotary type compressors and three-cylinder or multi-cylinder rotary type compressors and has the characteristics of simple and rational structure, flexibility in operation, high efficiency ratio and wide application range.

Description

technical field [0001] The invention relates to a rotary compressor, in particular to a multi-cylinder rotary compressor. Background technique [0002] In order to improve the reliability and efficiency of multi-cylinder rotary compressors represented by twin cylinders, in addition to the main bearing and sub bearing in the prior art, a third shaft and an intermediate shaft and intermediate bearing are added. In addition, in order to maximize the effective length of the intermediate bearing, two or more flat plates are used to form the intermediate spacer. [0003] In a large-capacity rotary compressor composed of multiple cylinders, not only the compression load of the compression chamber increases, but also the shaft length from the main bearing to the sub-bearing becomes longer, so there is a problem that the shaft rigidity of this part is insufficient. As a result, efficiency decreases due to wear of the eccentric shaft and incorrect movement of the piston. [0004] In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C23/00F04C29/00
Inventor 小津政雄梁自强
Owner GUANGDONG MEIZHI COMPRESSOR
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