Multi-cylinder rotary compressor

A rotary compressor and compression mechanism technology, applied in the field of compressors, can solve problems such as wear failure, increased vibration, and increased length between shafts, and achieve the effects of reducing assembly errors, improving rigidity, and expanding eccentricity.

Inactive Publication Date: 2015-10-14
GUANGDONG MEIZHI COMPRESSOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, in the multi-cylinder rotary compressor, the length between the shafts increases due to the addition of cylinders, so the vibration of the crankshaft that drives several pistons increases, causing the problem of wear failure.

Method used

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  • Multi-cylinder rotary compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] figure 1 In the illustrated multi-cylinder rotary compressor 1 , the outer circumference of a stator 4 a constituting a motor 4 and the outer circumference of a cylinder 10 included in a compression mechanism unit 52 of the rotary compressor are fixed to the inner diameter of a cylindrical housing 2 . The compression mechanism unit 52 is composed of the first cylinder 10 in which the two compression chambers and the intermediate partition are integrated, the main bearing 50 and the sub-bearing 55 connected to these compression chambers, the crankshaft 30 sliding on these bearings, and the like. The rotor 4b is fixed in the crankshaft 30 .

[0068] The exhaust pipe 3 connected to the upper end of the housing 2 , the first air intake pipe 26 connected to the outer periphery of the first cylinder 10 , and the second air intake pipe 27 are connected to the accumulator 80 . The exhaust pipe 3 and the accumulator 80 are respectively connected to the high pressure side and th...

Embodiment 2

[0085] Figure 7 It is the intermediate bearing 60b which slides the intermediate|middle plate hole 60a and the intermediate shaft 32 of Example 1. Here, the intermediate partition plate hole 60a in a state of sliding engagement with the intermediate shaft 32 is referred to as an intermediate bearing 60b. As a result, three bearings including the main bearing 50 , the intermediate bearing 60 b and the sub bearing 55 are slidingly fitted to the crankshaft 30 .

[0086] The intermediate bearing 60b is the third bearing, the piston 71b that rotates at a phase angle of 180 degrees, and the repetitive load generated by the compression force and the centrifugal force of the piston 71a, and is supported by the intermediate bearing 60b, the main bearing 50, the intermediate bearing 60b, and the sub bearing 55 .

[0087] In Example 2, by adding an intermediate bearing 60b for slidingly supporting the intermediate shaft 32, the runout of the sliding parts interlocking with the cranksh...

Embodiment 3

[0091] Figure 9 The design is: in Figure 7 A single intermediate plate 62 provided with an intermediate plate muffler 62 a and a second cylinder 130 provided with a compression chamber 13 are added as a three-cylinder compression mechanism section 53 in the middle of the two-cylinder compression mechanism section 52 . In this design, the two intermediate shafts, the intermediate partition plate, and the intermediate plate are slidingly fitted, so they become four bearings. The auxiliary shaft 33, the intermediate shaft 32a, and the intermediate shaft 32b have the same diameter, and the first eccentric shaft 35 and the third eccentric shaft 43 are separately assembled.

[0092] The additional single second cylinder 130 and the intermediate plate 62 are connected by screws to the highly rigid first cylinder 10, so the reliability and performance of the three-cylinder compression mechanism 53 are reduced, and high quality is maintained. In addition, the intermediate muffler 6...

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Abstract

The invention discloses a multi-cylinder rotary compressor which comprises a compression mechanism part. The compression mechanism part comprises at least one first cylinder and a crankshaft. Each first cylinder comprises two compression cavities and middle partition boards, the compression cavities and the middle partition boards are integrally formed, wherein the middle partition boards are located between the two compression cavities, and each middle partition board is provided with a middle partition board hole. The crankshaft comprises a main shaft, an auxiliary shaft, at least two eccentric shafts and a center shaft, the main shaft and a main bearing are matched, and the auxiliary shaft is matched with an auxiliary bearing. Each eccentric shaft is sleeved with one piston. A middle shaft is connected between every two adjacent eccentric shafts and penetrates through the corresponding middle partition board hole. At least one of two eccentric shafts corresponding to each first cylinder is separately combined with the crankshaft. According to the multi-cylinder rotary compressor, assembly errors can be reduced, rigidity is improved, the inner diameter of the middle partition board holes is small enough relative to the outer diameter of the eccentric shafts, and the core shift amount of the crankshaft can be increased.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a multi-cylinder rotary compressor. Background technique [0002] Compared with the single-cylinder rotary compressor, the multi-cylinder rotary compressor can generally operate at a low speed of 15rps to 120rps, and has advantages in operation vibration. In recent years, in order to cope with large-scale equipment, the application of 10HP class using inverter motors has progressed. [0003] On the other hand, in multi-cylinder rotary compressors, the inter-shaft length increases due to the addition of cylinders, so the vibration of the crankshaft that drives a plurality of pistons increases, causing a problem of wear failure. In addition, the center hole of the intermediate partition provided between the cylinders passes through the eccentric shaft during the assembly process, so the center hole becomes larger and the amount of eccentricity of the crankshaft is limited. [0004] As ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C29/00F04C18/344F04C23/00
Inventor 小津政雄赖化鸿王玲向卫民张诚
Owner GUANGDONG MEIZHI COMPRESSOR
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