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Axial thrust bearing supporting structure for crankshaft of refrigeration compressor

A technology of refrigeration compressors and thrust bearings, which is applied in the direction of mechanical equipment, machines/engines, liquid variable displacement machines, etc. It can solve the problem of not being able to better reduce friction and compressor friction power consumption, and it is difficult to adjust the kinematic pair Problems such as running status can be improved to improve assembly errors, reduce friction, and improve adjustment effects

Active Publication Date: 2015-01-07
黄石东贝压缩机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the manufacturing and installation errors of each part cause unilateral contact between the kinematic pair parts, it is difficult to adjust to improve the running state of the kinematic pair, so that the friction between the kinematic pairs and the friction power consumption of the compressor cannot be better reduced

Method used

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  • Axial thrust bearing supporting structure for crankshaft of refrigeration compressor
  • Axial thrust bearing supporting structure for crankshaft of refrigeration compressor
  • Axial thrust bearing supporting structure for crankshaft of refrigeration compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1 as figure 1 , 2 As shown, it includes a cylinder block 1, a crankshaft 2, a piston 3, a connecting rod 4 connecting the crankshaft and the piston, a vertical bearing hole for installing the crankshaft is arranged on the cylinder block, and an annular groove 11 is arranged on the upper orifice end face 6 of the bearing hole. The axial ball thrust bearing is installed in the ring groove. The axial ball thrust bearing is composed of an upper thrust ring (moving ring) 10, bearing balls 9 and a lower thrust ring (stationary ring) 8. The crank boss 15 is arranged in phase, and the bottom surface of the ring groove is provided with an annular boss 7, and the annular boss is connected with the cylinder block as a whole, which is a fixed structure, and the described annular boss is located under the axial ball thrust bearing The outer side of the center ring of the thrust ring raceway, and the inner diameter ΦC of the upper end surface of the annular boss is greater t...

Embodiment 2

[0020] Example 2 as image 3 , 4 As shown, the main difference between it and the previous embodiment is that the annular boss 7 is located inside the center circle of the raceway of the lower thrust ring 8 of the axial ball thrust bearing, and the outer diameter of the upper end surface of the annular boss is Less than the diameter of the center ring of the raceway of the lower thrust ring, the less than the amount 2a is 1.2 mm, that is, the distance between the lower thrust ring and the annular boss from the nearest contact point 12 to the center ring of the raceway of the lower thrust ring is a, so that the support There is a radial offset a between the acting force and the downward acting force of the thrust bearing. Other structures are the same as the previous embodiment.

Embodiment 3

[0021] Example 3 as Figure 5 As shown, the difference between it and the second embodiment is that the annular boss is a movable structure, which is composed of a movable washer installed on the bottom surface of the ring groove. The movable washer is ring-shaped and is an inner movable washer 13. Its inner diameter is the same as that of the bottom surface of the ring groove, and its outer diameter is smaller than the diameter of the center ring of the raceway of the lower thrust ring 8, and the smaller amount 2a is 1 mm. Other structures are the same as in the second embodiment above.

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PUM

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Abstract

The invention relates to an axial thrust bearing supporting structure for a crankshaft of a refrigeration compressor. The axial thrust bearing supporting structure comprises a cylinder seat, the crankshaft, a piston and a connecting rod, wherein an annular slot is formed at the periphery of the end face of an upper orifice of a bearing hole in the cylinder seat; an axial ball thrust bearing is arranged in the annular slot; an annular boss or an interrupted annular boss is formed on the bottom surface of the annular slot; the annular boss or the interrupted annular boss is positioned on the inner side of a central ring of a rolling path of a lower thrust ring of the axial ball thrust bearing; the outer diameter of the upper end face of the annular boss or the interrupted annular boss is less than or equal to the diameter of the central ring of the rolling path of the lower thrust ring; or the annular boss or the interrupted annular boss is positioned on the outer side of the central ring of the rolling path of the lower thrust ring of the axial ball thrust bearing; and the inner diameter of the upper end face of the annular boss or the interrupted annular boss is greater than or equal to the diameter of the central ring of the rolling path of the lower thrust ring. By the axial thrust bearing supporting structure, single-edge contact of a motion pair caused by manufacturing and installation errors of parts can be adjusted, the running state of the motion pair can be improved, and friction power consumption of the compressor can be reduced, so an aim of increasing the energy efficiency ratio of the compressor can be fulfilled.

Description

technical field [0001] The invention relates to a crankshaft axial thrust bearing support structure of an electromechanical integrated refrigeration compressor, in particular to a crankshaft axial thrust bearing support structure of a piston refrigeration compressor used in a refrigerator. Background technique [0002] Most of the existing fully enclosed refrigeration compressors use a reciprocating piston crankshaft-connecting rod mechanism, which includes a cylinder block, a crankshaft, a piston, and a connecting rod connecting the crankshaft and the piston. The motor rotor is directly set on the crankshaft to drive the crankshaft to rotate, and through the connecting rod Push the piston for reciprocating motion. A vertical bearing hole for installing the crankshaft is arranged on the cylinder block, a ring groove is arranged on the outer periphery of the upper hole end surface of the bearing hole, and an axial ball thrust bearing is installed in the ring groove, and the t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B39/00
Inventor 曹礼建王新南黄胜强戴竞雄王道富黄海珍
Owner 黄石东贝压缩机有限公司