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Crankshaft for three cylinder rotary compressor

A rotary compressor and crankshaft technology, applied in the field of crankshafts in compressors, can solve problems such as assembly failure, and achieve the effects of improving compactness, facilitating manufacturing and solving assembly problems.

Inactive Publication Date: 2008-07-16
李玉斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the three-cylinder compressor, since a cylinder is coaxially added on the basis of the two-cylinder compressor, if only the third crank throw is simply placed on the basis of the two-cylinder crankshaft, such as Figure 4 As shown, it is not difficult to see that the assembly of the middle crank throw of the crankshaft and the piston cannot be realized

Method used

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  • Crankshaft for three cylinder rotary compressor
  • Crankshaft for three cylinder rotary compressor
  • Crankshaft for three cylinder rotary compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Figure 5 ~ Figure 7 Shown is one of the embodiments of the present invention, including main shaft 1 and bellcrank, as Figure 5 As shown, there are three crank throws, starting from the short axis end of the crankshaft, they are the lower crank throw 4, the middle crank throw 3 and the upper crank throw 2, and they are integrally arranged with the main shaft 1. The distance between two adjacent crank throws is D Equal, the main shaft 1 is one-piece. In order to make the piston fully pass through the first bell crank, then move radially and insert the next bell crank. like Figure 6As shown, the distance D between two adjacent crank throws is greater than the height A of the compressor piston 6, and the axial width C of the crank throw is smaller than the thickness B of the partition plate 5 between the compressor pistons. In this way, the middle piston can be inserted from both sides of the crankshaft, so the two middle partitions can be designed with the same spec...

Embodiment 2

[0039] Figure 8 ~ Figure 12 Shown is the second embodiment of the present invention, which differs from the first embodiment in that the main shaft is disconnected between the lower bell crank 4 and the middle bell crank 3 (also between the middle bell crank 3 and the upper bell crank 2) The long axis 11 and the short axis 12 are two-stage, so that the design method and design points of the previous single-cylinder crankshaft and double-cylinder crankshaft can be completely followed. The compactness, the thickness of the partition is not limited by the thickness of the crank throw. like Figure 8 As shown, the crank throws are arranged on the main shaft, the distance between two adjacent crank throws is equal, and the phase angle between the crank throws is 120°. During assembly, the long shaft 11 can be assembled first, and then the short shaft 12 can be pressed in. As shown in FIG. 9 , the long shaft 11 and the short shaft 12 can be tightly fitted and embedded at the cros...

Embodiment 3

[0042] Figure 13 and Figure 14 Shown is the third embodiment of the present invention, which differs from embodiment two in that: as Figure 13 As shown, the major shaft 11 and the minor shaft 12 are sleeved with a sleeve 13 on the outer side of the disconnected part, that is, the fast connection is realized through the sleeve 13 . like Figure 14 As shown, the sleeve 13 can be a hollow cylindrical metal part, the inner diameter of which is slightly smaller than the outer diameter of the disconnection between the major axis 11 and the minor axis 12 in a cold state. When assembling, the sleeve 13 is first heated to a certain temperature. Due to the principle of thermal expansion and contraction, the inner diameter of the sleeve will be slightly larger than the outer diameter of the disconnected part of the long and short shafts, and then the long and short shafts will be separated from the Both ends of the sleeve are inserted, and when the temperature of the sleeve 13 drop...

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Abstract

The disclosed crankshaft includes main axis and bell cranks. The three bell cranks on the main axis are low bell crank, middle bell crank, and up bell crank in sequence from end of minor axis of crankshaft. Technical scheme is: phase angles between bell cranks are 105 - 150 degrees; main axis is in one-piece; at least one span between adjacent bell cranks is larger than height of compressor piston, and corresponding axial width of two bell cranks is less than thickness of clapboard between compressor pistons. Or anther technical scheme is adopted: spans between adjacent bell cranks are equal, and phase angles between bell cranks are 120 degrees; main axis is in two pieces of major axis and minor axis disconnected between adjacent bell cranks; corresponding adaptive tightening structures are setup on sections of major axis and minor axis. The invention solves issue of assembling pistons and crankshaft in compressor of three cylinders, and is in favor of design and production.

Description

technical field [0001] The present invention relates to a component part of a compressor, in particular to a crankshaft in the compressor. Background technique [0002] In the field of household air-conditioning compressors, rotary compressors occupy an overwhelming absolute advantage. At present, the annual output of rotary compressors in China has exceeded 50 million units. Among them, single-cylinder compressors are the majority, followed by double-cylinder compressors. Since the fluctuation of the running resistance torque of the double-cylinder compressor is only 1 / 3 of that of the single-cylinder compressor, it has superior dynamic characteristics and the overall vibration has been greatly improved. If a three-cylinder compressor is used, it has more superior dynamic characteristics. Research experiments show that its running resistance torque is only 1 / 10 of that of a single-cylinder compressor with the same displacement, and 1 / 3 of that of a two-cylinder compressor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C3/06F04C29/00
Inventor 李玉斌
Owner 李玉斌