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A rotary compressor

A technology for rotary compressors and bearings, which is applied to rotary piston/oscillating piston pump components, mechanical equipment, machines/engines, etc. It can solve the problem that it is difficult to ensure the coaxiality of the main and auxiliary bearings and the gap cannot be guaranteed Uniformity, reduce production tact, etc., to achieve the effect of enhancing rigidity, reducing vibration and noise, and improving lubrication effect

Active Publication Date: 2018-12-07
SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The integrated upper support structure proposed by patent CN200820200106 is difficult to ensure the coaxiality with the main and auxiliary bearings during installation, which may easily cause the crankshaft to be stuck
Patents CN200910213811 and CN201410378361 proposed a combined upper support structure. This structure fine-tunes the gap between the inner hole of the upper support and the crankshaft by tightening the screw holes. Although it can avoid the jamming of the crankshaft and the upper support, it cannot guarantee a uniform gap
And the assembly efficiency of this upper support structure is low, which will reduce the production beat

Method used

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  • A rotary compressor
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Examples

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Effect test

no. 1 example

[0086] Such as figure 1 As shown, the upper and lower ends of the casing 2 in the rotary compressor of the present invention are respectively welded with the upper cover 1 and the lower cover 7 . The motor 3 is placed in the housing 2 , and the motor 3 includes an inner rotor 32 and an outer stator 33 sleeved on the crankshaft 31 . The outer stator 33 is fixed to the casing 2 . The inner rotor 32 is inserted into the outer stator 33 with a predetermined gap therebetween, and then rotates by interacting with the outer stator 33 . The crankshaft 31 is coupled to the inner rotor 32 to transmit the rotational force of the inner rotor 32 to the compression part 5 . The lower part of the crankshaft 31 is positioned on the central axis of the housing 2 by means of bearings (the lower support member 4 and the lower bearing 6 ). The lower support member 4 passes through the internal boss 42 structure ( Figure 4 Inner cylindrical structure) and the crankshaft 31 constitute a fricti...

no. 2 example

[0096] The second embodiment introduces a second structure of the upper support member 8 . Such as Figure 7 and 8 As shown, the difference between the second embodiment and the second embodiment is that the bearing part 81 and the flange part 82 in the second embodiment are not integral, and the bearing part 81 can be connected to the flange part 82 by screws 83, but This is not the limit.

[0097] In this embodiment, the bearing portion 81 includes three support arms 813 , but it is not limited thereto. The support arm 813 extends outward from the center of the bearing portion 81 . The flange portion 82 has three connection ports 828 . The outer end of the support arm 813 is screwed to the connection port 828 through the screw 83 . With the bearing portion 81 as the center of the circle, the intervals between the connecting ports 828 are 120 degrees, but not limited thereto. Among them, the three connection ports 828 are connected in a circular direction by an arc pane...

no. 3 example

[0102] The third embodiment introduces a third structure of the upper support member 8 . Such as Figure 10 and 11 As shown, the difference between the third embodiment and the first embodiment is that the bearing part 81 and the flange part 82 in the third embodiment are not integrated, and the bearing part 81 can be connected to the flange part 82 by screws 83, But not limited to this.

[0103]The third embodiment provides another combined structure of the upper support 8 . The flange portion 82 includes two sections of arc panels 825 , a ring portion 826 composed of reinforcing ribs 823 and four extending arms 829 . The ring portion 826 is sleeved on the outer periphery of the bearing portion 81 . The ring portion 826 is connected to two sections of arc panels 825 through the extension arms 829 , and the arc panels 825 are respectively located on both sides of the ring portion 826 . The upper end of the bearing portion 81 has an outwardly expanding shoulder 815 , the o...

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Abstract

The invention provides a rotary compressor which comprises a shell, a motor, a compressing component, a crankshaft, a lower supporting piece, a lower bearing and an upper supporting piece. The motor and the compressing component are contained in the shell. Rotating force of the motor is transmitted to the compressing component through the crankshaft so that refrigerant can be compressed. The compressing space of the compressing component is defined through the lower supporting piece, the lower bearing and the compressing component together, and the lower portion of the crankshaft is supported. The upper portion of the crankshaft is supported through the upper supporting piece. The upper supporting piece comprises a bearing portion and a flange portion, and the bearing portion is in sleeving connection with the upper end of the crankshaft. The flange portion extends outwards with the bearing portion as the circle center, and a plurality of arc face plates attached to the inner wall of the shell and reinforcing ribs separated from the inner wall of the shell are arranged on the outer edge of the flange portion. The arc face plates are connected to the inner wall of the shell, and through holes allowing refrigerant to circulate are formed between the reinforcing ribs and the inner wall of the shell. The rigidity of a pump body of the compressor is enhanced, and the efficiency of the compressor is improved. Deformation of a shaft system is reduced, and vibration and noise of the whole compressor are lowered.

Description

technical field [0001] The invention relates to a rotary compressor, in particular to a rotary compressor with an upper support. Background technique [0002] The rotary compressor includes a pump body assembly and a motor assembly arranged in a sealed casing. The pump body assembly includes a cylinder, a piston, a crankshaft that drives the piston to rotate eccentrically, blades in the blade grooves of the cylinder, and main shafts for supporting the crankshaft on both sides of the cylinder. Bearings and auxiliary bearings, the pump body assembly is fixed on the casing through the flange of the main bearing. The motor assembly includes a stator fixed on the housing and a rotor fixed on the crankshaft. In the rotary compressor, the crankshaft is bent and deformed under external loads such as gas force and centrifugal force. The larger the displacement of the compressor, the greater the deflection at the end of the long axis of the crankshaft. In order to ensure a uniform s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C29/00F04C29/02
Inventor 陈艳春黄之敏
Owner SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
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