CN-224214368-U - Three-cylinder sliding vane compressor

CN224214368UCN 224214368 UCN224214368 UCN 224214368UCN-224214368-U

Abstract

A three-cylinder sliding vane compressor comprises an upper cylinder, a middle cylinder and a lower cylinder which are overlapped together, rotor shafts penetrating through the three cylinders, an upper compression cavity, a middle compression cavity and a lower compression cavity are formed in the three cylinders respectively, the volumes of the upper compression cavity and the lower compression cavity are smaller than those of the middle compression cavity, the longitudinal projection of the upper compression cavity is overlapped with the longitudinal projection of the lower compression cavity, one part of the longitudinal projection of the upper compression cavity is overlapped with one part of the longitudinal projection of the middle compression cavity, and the other part of the longitudinal projection of the upper compression cavity is staggered. Compared with the prior art, the three-cylinder sliding vane compressor has the advantages that the three-cylinder sliding vane compressor is ingenious in design, two middle cylinders are combined into one to form a larger cylinder, space and parts are saved, the assembly process is simplified, the compression efficiency is improved, and in specific working, the forces of high and low pressures of the upper cylinder and the lower cylinder acting on the rotor shaft are offset with the forces of the middle cylinder acting on the rotor shaft.

Inventors

YAN HONG
MA JIANSHENG
HUANG XUEMEI

Assignees

杭州弘扬制冷设备股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250514

Claims (8)

1. A three-cylinder sliding vane compressor comprises an upper cylinder, a middle cylinder and a lower cylinder which are overlapped together, and rotor shafts penetrating through the three cylinders, wherein an upper compression cavity, a middle compression cavity and a lower compression cavity are respectively formed in the three cylinders, an upper chute, a middle chute and a lower chute which penetrate through the rotor shafts along the diameter are respectively formed in the position corresponding to each compression cavity from top to bottom, a first vane and a second vane are arranged in the upper chute, a third vane and a fourth vane are arranged in the middle chute, a fifth vane and a sixth vane are arranged in the lower chute, and an air inlet hole and an air outlet hole which are communicated with the compression cavities are formed in the three cylinders.
2. The three cylinder slide vane compressor of claim 1 wherein the upper compression chamber and the lower compression chamber have the same volume and the sum of the volumes of the upper compression chamber and the lower compression chamber is equal to the volume of the middle compression chamber.
3. The three-cylinder sliding vane compressor of claim 1, wherein the upper cylinder, the middle cylinder and the lower cylinder have the same diameter, and the height of the middle cylinder is the sum of the heights of the upper cylinder and the lower cylinder.
4. The three-cylinder sliding vane compressor of claim 3, wherein the first vane, the second vane, the fifth vane and the sixth vane are identical in structure, the third vane and the fourth vane are identical in structure, and the third vane is twice as high as the first vane.
5. The three-cylinder sliding vane compressor of claim 1, wherein the exhaust holes of the upper cylinder and the lower cylinder are in the same direction, and the exhaust holes of the upper cylinder and the middle cylinder are in opposite directions.
6. The three-cylinder sliding vane compressor of claim 1, wherein longitudinal projections of the upper, middle and lower sliding grooves on the rotor shaft coincide.
7. The three-cylinder sliding vane compressor of claim 1 wherein a first sealing part attached to the rotor shaft is arranged on the inner wall between the air inlet and the air outlet in the upper compression chamber, a second sealing part attached to the rotor shaft is arranged on the inner wall between the air inlet and the air outlet in the middle compression chamber, a third sealing part attached to the rotor shaft is arranged on the inner wall between the air inlet and the air outlet in the lower compression chamber, longitudinal projections of the first sealing part and the third sealing part are overlapped and are positioned on one side of the rotor shaft, and the longitudinal projection of the second sealing part is positioned on the other side of the rotor shaft.
8. The three-cylinder sliding vane compressor of claim 1, wherein the three-cylinder sliding vane compressor comprises an upper cylinder, a middle cylinder, a lower cylinder, a first cylinder cover arranged at the top of the upper cylinder, a second cylinder cover arranged between the upper cylinder and the middle cylinder, a third cylinder cover arranged between the middle cylinder and the lower cylinder, and a fourth cylinder cover arranged at the bottom of the lower cylinder.

Description

Three-cylinder sliding vane compressor Technical Field The utility model relates to the technical field of compressors, in particular to a three-cylinder sliding vane compressor. Background The existing rotor compressor is represented by a sliding vane type compressor, the rotor of the existing rotor compressor generally comprises a rotating shaft and a supporting body arranged on the rotating shaft, a plurality of sliding grooves for accommodating blades are formed in the supporting body, the blades are slidably positioned in the sliding grooves, the rotor eccentrically rotates in a compression cavity, and the blades stretch out and draw back in the sliding grooves according to the change of the distance between the blades and the wall of the compression cavity in the rotation process. Compared with a cam rotor or other types of rotor compressors, the vane rotor of the compressor has higher compression efficiency in the compression cavity with the same volume. The patent publication number 103807174B discloses a three-cylinder rolling rotor compressor, wherein a cylinder assembly is provided with three cylinder units, sliding vanes of two adjacent cylinders are staggered by 120 degrees, sliding vanes of a third cylinder are staggered by 60 degrees with sliding vanes of other two cylinders, the eccentric directions of two adjacent eccentric shafts on a crankshaft which is integrally processed are completely the same, the third eccentric shaft is staggered by 180 degrees with other two eccentric shafts, a torque balance mechanism is arranged for the eccentric shafts which are independently staggered by 180 degrees, the two cylinders with the sliding vanes staggered by 120 degrees are assembled on the same side, and the eccentric shaft which is staggered by 180 degrees is assembled with the third cylinder on the other side. According to the scheme, although three cylinders are operated simultaneously, the displacement is larger, the whole compressor accords with the torque more uniformly, and the rotation is more balanced. However, when the crankshaft rotates, the stress directions of the parts in the cylinders are inconsistent, the crankshaft is stressed in three different directions in the radial direction and is always in a spiral stress state, and the conditions of fatigue, heat generation, fracture and the like of the crankshaft can be caused after long-term use. Disclosure of utility model The utility model aims to overcome the defects of the prior art and provide the three-cylinder sliding vane compressor with small volume, high compression efficiency and stable operation of a rotating shaft. The three-cylinder sliding vane compressor comprises an upper cylinder, a middle cylinder and a lower cylinder which are overlapped, rotor shafts penetrating through the three cylinders are arranged in the three cylinders, an upper compression cavity, a middle compression cavity and a lower compression cavity are respectively formed in the three cylinders, an upper chute, a middle chute and a lower chute which penetrate through the rotor shafts along the diameter are respectively arranged at the position corresponding to each compression cavity from top to bottom, a first blade and a second blade are arranged in the upper chute, a third blade and a fourth blade are arranged in the middle chute, a fifth blade and a sixth blade are arranged in the lower chute, an air inlet hole and an air exhaust hole which are communicated with the compression cavities of the three cylinders are respectively arranged on the three cylinders, the volume of the upper compression cavity and the volume of the lower compression cavity are smaller than the volume of the middle compression cavity, the longitudinal projection of the upper compression cavity is overlapped with the longitudinal projection of the lower compression cavity, one part of the longitudinal projection of the upper compression cavity is overlapped with the longitudinal projection of the middle compression cavity, and the other part of the longitudinal projection is staggered. The three-cylinder sliding vane compressor provided by the utility model also adopts the following auxiliary technical scheme: The upper compression chamber and the lower compression chamber have the same volume, and the sum of the volumes of the upper compression chamber and the lower compression chamber is equal to the volume of the middle compression chamber. The diameters of the upper cylinder, the middle cylinder and the lower cylinder are the same, and the height of the middle cylinder is the sum of the heights of the upper cylinder and the lower cylinder. The first blade, the second blade, the fifth blade and the sixth blade are identical in structure, the third blade and the fourth blade are identical in structure, and the height of the third blade is twice that of the first blade. The exhaust hole directions of the upper cylinder and the lower cylinder are the same, and the exhaust hole