CN216198957U

CN216198957U - High efficiency scroll compressor with leakage compensation

Info

Publication number: CN216198957U
Application number: CN202120962488.1U
Authority: CN
Inventors: 孙志娟
Original assignee: OPEN UNIVERSITY OF CHINA
Current assignee: OPEN UNIVERSITY OF CHINA
Priority date: 2021-05-08
Filing date: 2021-05-08
Publication date: 2022-04-05
Anticipated expiration: 2031-05-08

Abstract

A high-efficiency scroll compressor with leakage compensation comprises a shell, a fixed scroll, a movable scroll, a cross ring, a crankshaft, an upper support, a motor stator, a motor rotor, a lower support and an exhaust pipe; the motor rotor is assembled with a crankshaft in an interference fit mode, and the crankshaft is connected with a movable scroll; decide the vortex dish and move the vortex dish and mutually support and form compression chamber, its characterized in that: processing one to multiple involute grooves on the top surfaces of the movable scroll and the fixed scroll; wherein, a compensation block is arranged in a groove formed on the top surface of the fixed scroll wrap and is tightly attached to the bottom surface of the movable scroll wrap. Further, the contact surface of the compensation block and the bottom surface of the movable scroll tooth is provided with a circular pit, and further, a rolling bearing is installed between the crankshaft and the lower support. This scheme is for improving vertical scroll compressor efficiency, provides new move, decide the vortex dish seal structure in order to reduce radial leakage to and replace sliding friction's support form with rolling friction, reduce power consumption, raise the efficiency.

Description

High efficiency scroll compressor with leakage compensation

Technical Field

The utility model relates to a sealing structure of a movable vortex disc and a fixed vortex disc of a vertical vortex compressor, and a supporting structure of a crankshaft, a motor stator and the like.

Background

FIG. 1 is a prior art vertical scroll compressor configuration.

The vertical scroll compressor mainly structurally comprises a shell 1, a fixed scroll 2, a movable scroll 3, a cross ring 4, a crankshaft 5, an upper support 6, a motor stator 7, a motor rotor 8, a lower support 9 and an exhaust pipe 10. The motor rotor 8 and the crankshaft 5 are assembled together in an interference fit mode, and the gravity of the motor rotor is balanced by the supporting force of the lower support 9. When the motor stator 7 is powered on, the motor rotor 8 rotates, and the driving crankshaft 5 also rotates along with the motor rotor. The crankshaft 5 drives the movable scroll 3 to do eccentric motion. The fixed scroll 2 and the movable scroll 3 cooperate with each other to form a compression chamber, the compression chamber moves toward the center along with the movement of the movable scroll, the volume is reduced while the compression chamber moves, the pressure is increased, and the compressed gas is discharged through the gas discharge pipe 10.

The defects of the prior art are as follows:

1. the movable and fixed scroll plates are assembled in a way that compressed gas leaks, including radial leakage and tangential leakage, wherein the compressed gas mainly leaks from the axial fit clearance between the tooth top surface of the fixed scroll and the tooth bottom surface of the movable scroll plate, as shown in figure 1I.

2. The weight of the crankshaft, the motor stator and the like of the vertical scroll compressor is borne by the lower support, the support surface is in sliding friction, and the power consumption is large, as shown in a diagram II in fig. 1.

Disclosure of Invention

The present invention is directed to solving the above problems of the prior art and to providing an improved high efficiency scroll compressor with leakage compensation, as shown in fig. 2.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

1. one or more involute grooves are processed on the top surface of the movable scroll and the fixed scroll, as shown in figure 3. Wherein the top surface of the fixed scroll 2 is provided with a groove, and a compensation block is arranged in the groove, as shown in figure 2 III. The compensation block naturally falls under the action of gravity, and can compensate the axial assembly clearance of the movable and fixed scroll plates. The compensation block is tightly attached to the bottom surface of the movable scroll wrap, a circular pit is formed in the contact surface of the compensation block and the bottom surface of the movable scroll wrap, and as shown in fig. 4, lubricating oil can be stored in the pit so as to reduce the friction loss between the compensation block and the movable scroll wrap. The top surface of the movable scroll wrap is tightly attached to the bottom surface of the fixed scroll wrap, the top surface of the movable scroll wrap is grooved, lubricating oil can be stored in the groove, and as shown in a figure III in figure 2, the friction loss between the movable scroll wrap and the fixed scroll wrap is reduced.

2. A rolling bearing is arranged between the crankshaft and the lower support, and as shown in a graph IV in figure 2, the sliding friction pair is changed into a rolling friction pair, so that the power loss of a motor is reduced, and the efficiency of the scroll compressor is improved.

This scheme is for improving vertical scroll compressor efficiency, provides new move, decide the vortex dish seal structure in order to reduce radial leakage to and replace sliding friction's support form with rolling friction, reduce power consumption, raise the efficiency.

Drawings

FIG. 1 original vertical scroll compressor structure

A shell 1, a fixed scroll 2, a movable scroll 3, a cross ring 4, a crankshaft 5, an upper support 6,

motor stator 7, motor rotor 8, lower support 9 and exhaust pipe 10

FIG. 2 improved vertical scroll compressor structure

The device comprises a shell 1, a fixed scroll 2, a movable scroll 3, a cross ring 4, a crankshaft 5, an upper support 6, a motor stator 7, a motor rotor 8, a lower support 9, an exhaust pipe 10, a compensation block 11 and a rolling bearing 12

FIG. 3 shows the top surface of the vortex tooth of the fixed and movable vortex plate

FIG. 4 compensation block and its lower surface pit structure

Detailed Description

The specific implementation technical scheme of the utility model is as follows:

1. one or more grooves are machined on the top surfaces of the scrolls of the fixed scroll 2 and the movable scroll 3, as shown in fig. 3. The compensation block 11 is arranged in the tooth crest groove of the fixed scroll 2, and the compensation block 11 is tightly attached to the tooth bottom surface of the movable scroll 3 under the action of gravity, so that the radial leakage is reduced, as shown in a figure III in figure 2. The surface of the compensation block is additionally provided with a circular pit, as shown in figure 4, lubricating oil can be stored in the pit, so that the friction loss between the compensation block and the movable scroll is reduced. Lubricating oil can be stored in the groove on the top surface of the movable scroll wrap, and friction loss between the movable scroll wrap and the fixed scroll wrap is reduced as shown in figure 2 in figure III.

2. The rolling bearing 12 is additionally arranged between the crankshaft 5 and the lower support 9, so that a sliding friction pair in the original structure is changed into a rolling friction pair in the existing structure, and the power loss of the motor is reduced.

The utility model has the following characteristics:

1. utilize the compensation piece to reduce and move, decide the scroll between the axial fit clearance to reduce and move, decide the radial leakage between the scroll, and at the compensation piece with move the scroll complex surface processing and go out circular pit, in order to do benefit to the storage of lubricating oil, reduce friction loss, improved scroll compressor's efficiency.

2. The sliding friction pair in the supporting structure is changed into a rolling friction pair, so that the power consumption of the motor is reduced, and the efficiency of the scroll compressor is improved.

Claims

1. A high-efficiency scroll compressor with leakage compensation comprises a shell, a fixed scroll, a movable scroll, a cross ring, a crankshaft, an upper support, a motor stator, a motor rotor, a lower support and an exhaust pipe; the motor rotor is assembled with a crankshaft in an interference fit mode, and the crankshaft is connected with a movable scroll; decide the vortex dish and move the vortex dish and mutually support and form compression chamber, its characterized in that: one to multiple involute grooves are processed on the top surfaces of the movable scroll and the fixed scroll.

2. A high efficiency scroll compressor with leakage compensation as claimed in claim 1 wherein the compensation block is mounted in a groove formed in the top surface of the non-orbiting scroll wrap and is in close contact with the bottom surface of the orbiting scroll wrap.

3. A high efficiency scroll compressor with leakage compensation as claimed in claim 2, wherein the contact surface of the compensation block with the bottom surface of the orbiting scroll wrap is dimpled.

4. A high efficiency scroll compressor with leakage compensation as claimed in claim 1, wherein a rolling bearing is installed between the crankshaft and the lower supporter.