CN212079630U - Rotary compressor - Google Patents

Abstract

The utility model relates to a rotary compressor, which comprises a shell and a core, wherein the core comprises a pump body, the pump body comprises a cylinder, an upper cylinder cover flange, a lower cylinder cover flange and a piston, the upper cylinder cover flange is welded with the inner side wall of the shell in a three-welding-spot uniform distribution mode, a suction hole is arranged on the side surface of the shell, a suction pipe and a suction connecting pipe are arranged on the suction hole, the overlooking direction included angle between the suction hole and the nearest welding spot on the upper cylinder cover flange is gamma, and the gamma is 30-45 degrees; this compressor is through improving the back for the compressor is at the in-process of inhaling the exhaust, and noise that produces in the pump body and the influence that the vibration caused reduce to minimumly after transmitting the casing, thereby make the whole steady operation of machine, satisfy normal work demand.

Description

Rotary compressor

Technical Field

The utility model belongs to the technical field of compressor equipment technique and specifically relates to a rotary compressor.

Background

The existing rotary compressor usually adopts an upper flange welding mode, namely, a shell and a machine core are welded together through an upper flange, and three points or six points are uniformly distributed on the periphery of the shell and are welded with the upper flange. However, the welding point nearest to the wicking air hole has no uniform standard with the angle of the air suction hole in the horizontal direction. If the arrangement is unreasonable, the compressor vibrates greatly, and the pump body inclines seriously, so that the compressor is blocked.

Disclosure of Invention

The utility model aims at providing a rotary compressor to above-mentioned condition, this compressor is through improving the back for the compressor is inhaling carminative in-process, and the noise that produces in the pump body and the influence that the vibration caused drop to minimumly after transmitting the casing, thereby make the whole steady operation of machine, satisfy normal work demand.

The utility model has the following concrete scheme: a rotary compressor comprises a shell and a machine core, wherein the machine core comprises a pump body, the pump body comprises a cylinder, an upper cylinder cover flange, a lower cylinder cover flange and a piston, the upper cylinder cover flange and the inner side wall of the shell are in welding connection in a mode of uniformly distributing three welding spots, a suction hole is formed in the side face of the shell, a suction pipe and a suction connecting pipe are mounted on the suction hole, an overlooking direction included angle between the suction hole and the nearest welding spot on the upper cylinder cover flange is gamma, and the gamma is 30-45 degrees.

Further, in the present invention, the movement further includes a stator, a rotor, a crankshaft, and a sound-deadening chamber, and the casing is externally provided with a liquid reservoir.

Further, in the utility model discloses in still be equipped with slide groove and exhaust hole on the cylinder, wherein the contained angle that slide groove and suction hole overlooked the direction is alpha, overlooks the direction contained angle between slide groove and the exhaust hole and is beta, and wherein alpha is 24 +/-3, and beta is 14 +/-3.

The utility model discloses a rotary compressor is through to the improvement of the solder joint that is closest between suction hole and upper cylinder cover flange and the casing contained angle on the horizontal direction, the suction hole with from the nearest solder joint of suction hole optimum between 30 ~ 45 scopes of contained angle gamma design on the horizontal direction, vibration and noise that produce when can guaranteeing rotary compressor to start reach the minimum to make the whole steady operation of machine, satisfy normal work demand.

Drawings

FIG. 1 is a schematic view of the main section structure of the present invention;

FIG. 2 is a schematic top view of an upper cylinder head flange and a suction hole of the present invention;

fig. 3 is a schematic top view of the suction hole and the slide groove of the present invention.

In the figure: 1-stator, 2-rotor, 3-crankshaft, 4-anechoic chamber, 5-upper cylinder cover flange, 6-cylinder, 7-lower cylinder cover flange, 8-inspiration connecting pipe, 9-inspiration pipe, 10-inspiration hole, 11-reservoir, 12-welding spot, 13-slide groove, 14-exhaust hole, 15-shell, 16-piston.

Detailed Description

Referring to fig. 1-3, the main viewing direction in fig. 1, the overlooking direction in this embodiment is based on the viewing angle in fig. 1, the utility model relates to a rotary compressor, including casing 15 and core, wherein the core includes the pump body, the pump body is including cylinder 6, upper cylinder cover flange 5, lower cylinder cover flange 7 and piston 16, the upper cylinder cover flange with the casing inside wall adopts the form of three solder joints 12 equipartition to carry out welded connection, is equipped with suction hole 10 on the casing side, is equipped with breathing pipe 9 and suction connecting pipe 8 on the suction hole, the suction hole with overlooking direction contained angle between the nearest solder joint on the upper cylinder cover flange is gamma, and gamma is 30 ~ 45.

Further, the movement in this embodiment further includes a stator 1, a rotor 2, a crankshaft 3, and a sound-deadening chamber 4, and a liquid reservoir 11 is further installed outside the housing.

Further, in this embodiment, the cylinder is further provided with a slide groove 13 and an exhaust hole 14, wherein an angle between the slide groove and the overlooking direction of the suction hole is α, an angle between the slide groove and the exhaust hole in the overlooking direction is β, wherein α is 24 ° ± 3 °, and β is 14 ° ± 3 °.

In the embodiment, the included angle gamma between the suction hole of the rotary compressor and the welding point closest to the suction hole in the horizontal direction (namely, the overlooking direction from top to bottom) is designed to be 30-45 degrees, so that the influence caused by noise and vibration generated in the pump body is reduced to the minimum after the noise and the vibration are transmitted to the shell in the suction and exhaust processes of the compressor, the whole machine operates stably, and the normal working requirement is met.

According to the structural characteristics of the rotary compressor, the included angle alpha between the suction hole and the slide sheet groove should be as small as possible. If α is too large, it can cause excessive vacuum to be created as the gas expands in the suction chamber before the compressor suction begins. However, if α is too small, the minimum wall thickness between the suction hole and the vane groove may be insufficient, and the vane groove may be deformed, and the α angle is usually set to about 24 ° ± 3 °.

The angle beta between the vent hole and the slide groove should also be as small as possible. If β is too large, it will cause the gas in the compression chamber to over-compress at the end of compressor discharge. However, too small β also results in insufficient minimum wall thickness between the vent hole and the slide groove, resulting in deformation of the slide groove. The angle β is therefore usually set around 14 ° ± 3 °.

The utility model provides a gamma satisfies gamma ≈ alpha + beta when concrete implementation, and is more suitable when 30 ~ 45 according to experimental gamma angle many times. When γ is this angle, the shock of the discharge pressure, particularly the shock vibration generated by the discharge pressure at the moment of the compressor start-up, can be reduced just in the vicinity of the position where β is located. In addition, the gravity center of the pump body is in the range of alpha, the welding point is arranged at the position, 2-point support can be formed on the pump body together with the suction hole, the stress is more uniform, the inclination of the pump body can be reduced, and the vibration of the compressor can be reduced.

The following table shows the noise and vibration of the rotary compressor and the variation of the included angle gamma

The above experimental research data show that as the included angle between the suction hole of the rotary compressor and the welding point closest to the suction hole increases in the horizontal direction, the noise and vibration of the compressor gradually decrease, and when the critical value is 37.5 degrees, the noise and vibration influence of the compressor is the lowest, and after the critical value is exceeded, the noise and vibration influence of the compressor tends to increase as the included angle increases. From the above table, it can be concluded that when the included angle is smaller than 30 ° or larger than 45 °, the compressor has poor performance in terms of noise and vibration, so the angle is not suitable for designing in the region outside the range of 30-45 °, and therefore, it can be concluded from experimental data that: the included angle gamma between the suction hole of the compressor and the welding point closest to the suction hole opening in the horizontal direction is set within the range of 30-45 degrees, so that the noise and vibration of the compressor can be effectively improved.

Claims (3)

1. The utility model provides a rotary compressor, including casing and core, wherein the core is including the pump body, the pump body is including the cylinder, go up the cylinder cap flange, lower cylinder cap flange and piston, go up the cylinder cap flange with the form that the casing inner wall adopted three solder joint equipartitions carries out welded connection, is equipped with the suction hole on the casing side, is equipped with the breathing pipe on the suction hole and breathes in connecting pipe, its characterized in that: the included angle of the overlooking direction between the air suction hole and the nearest welding point on the flange of the upper cylinder cover is gamma, and the gamma is 30-45 degrees.

2. The rotary compressor of claim 1, wherein: the machine core also comprises a stator, a rotor, a crankshaft and a silencing cavity, and a liquid storage device is also arranged outside the shell.

3. The rotary compressor of claim 1, wherein: the air cylinder is further provided with a sliding sheet groove and an exhaust hole, wherein an included angle between the sliding sheet groove and the overlooking direction of the air suction hole is alpha, an included angle between the sliding sheet groove and the exhaust hole in the overlooking direction is beta, wherein alpha is 24 degrees +/-3 degrees, and beta is 14 degrees +/-3 degrees.

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