Motor direct cooling structure of gas compressor

Abstract

The utility model relates to the technical field of gas compressors, in particular to a motor direct cooling structure of a gas compressor. Comprising a motor, the end of the motor is connected with a compression pump head, the motor comprises a shell, a stator and a main shaft are arranged in the shell, steel sheet grooves are formed in the inner surface of the shell along the circumference and used for installing and fixing steel sheets of the stator, the steel sheets and the steel sheet grooves are installed in an attached and sealed mode, and continuous air guide grooves are formed in the inner surfaces of the steel sheet grooves. Cooling gas inlets are formed in the positions, corresponding to the front ends of the gas guide grooves, of the shell, exhaust grooves for exhausting gas to one side of the stator are formed in the positions, corresponding to the tail ends of the gas guide grooves, of the inner surface of the shell, and a cooling gas outlet is formed in the position, on the other side of the stator, of the shell. The cooling device can directly cool the steel sheets of the stator and the coils on the two sides, is good in cooling effect, can timely carry and discharge heat in the motor cavity, prevents the heat from accumulating in the motor cavity, protects the motor, and prolongs the service life of the motor.

Description

Technical Field

[0001] This utility model relates to the field of gas compressor technology, and in particular to a direct cooling structure for the motor of a gas compressor. Background Technology

[0002] Currently, in high-speed centrifugal air compressors, air is generally pressurized by a pump head driven by a motor to form high-pressure gas. The motor is prone to overheating during high-speed operation and needs to be cooled in time. For example, patent application CN111478497A discloses a two-stage series centrifugal gas compressor and its motor. Its motor cooling is mainly a water cooling system. By setting a water cooling channel in the motor housing, cooling water flows through the water cooling channel and removes heat through heat exchange with the stator and housing. This water cooling system can only quickly cool the part of the stator close to the housing, and then relies on heat conduction to cool slowly from the outside to the inside. The cooling effect is poor and it cannot quickly remove the heat inside the stator, causing heat to accumulate inside the stator. This can easily lead to motor overheating and shutdown, affecting the motor's lifespan. There is currently no good way to solve the above problems.

[0003] In summary, the aforementioned problems of gas compressors during operation have become urgent technical challenges that need to be addressed within the industry. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides a direct cooling structure for the motor of a gas compressor, which solves the problems of poor cooling effect and inability to quickly dissipate heat from the stator when using water cooling systems for motors.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A direct cooling structure for a gas compressor motor includes a motor with a compressor pump head connected to the motor end. The motor includes a housing, within which a stator and a main shaft are housed. A steel plate groove is provided along the circumference of the inner surface of the housing for mounting and fixing steel plates of the stator. The steel plates are fitted and sealed to the steel plate groove. A continuously arranged air guide groove is provided on the inner surface of the steel plate groove, with the beginning and end of the groove spaced apart. A cooling gas inlet is provided on the housing corresponding to the front end of the air guide groove, and an exhaust groove is provided on the inner surface of the housing corresponding to the rear end of the air guide groove to discharge gas to one side of the stator. A cooling gas outlet is provided on the housing on the other side of the stator.

[0007] The edges of the steel sheet and the steel sheet groove are sealed with sealant.

[0008] The shape of the air guide groove includes continuously arranged S-shape, W-shape or spiral shape.

[0009] The present invention adopts the above solution and has the following advantages:

[0010] By providing continuously arranged air guide grooves within the steel plate grooves on the inner surface of the housing, and an exhaust groove corresponding to the tail end of the air guide grooves on the inner surface of the housing to discharge gas to one side of the stator, a cooling gas outlet is provided on the housing on the other side of the stator. External cooling gas can enter the air guide grooves through the cooling gas inlet to directly cool the stator's steel plates. Then, the cooling gas in the air guide grooves is discharged through the exhaust grooves to the motor cavity on one side of the stator, cooling the stator coils on that side. The gas then passes through the gap between the stator and the spindle to the motor cavity on the other side of the stator, cooling the stator coils on that side. Finally, it is discharged outwards through the cooling gas outlet. This invention replaces the previous water cooling method with air cooling, which not only directly cools the stator's steel plates and the coils on both sides with good cooling effect, but also promptly carries away and dissipates heat from inside the motor cavity, preventing heat accumulation and protecting the motor, thus extending its service life. Attached Figure Description

[0011] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0012] Figure 2 This is a three-dimensional structural diagram of the motor housing of this utility model.

[0013] Figure 3 This is a cross-sectional view of the motor housing of this utility model.

[0014] In the diagram, 1 is the housing, 2 is the stator, 3 is the spindle, 4 is the steel plate groove, 5 is the air guide groove, 6 is the cooling gas inlet, 7 is the exhaust groove, and 8 is the cooling gas outlet. Detailed Implementation

[0015] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0016] like Figure 1-3 As shown, a direct cooling structure for a gas compressor motor includes a motor with a compressor pump head connected to the motor end. The motor includes a housing 1, a stator 2 and a main shaft 3 inside the housing 1. The inner surface of the housing 1 is provided with a steel plate groove 4 along the circumference. The steel plate groove 4 is used to install and fix the steel plates of the stator 2. The steel plates are fitted and sealed with the steel plate groove 4. The inner surface of the steel plate groove 4 is provided with continuously arranged air guide grooves 5, with the beginning and end of the air guide grooves 5 spaced apart. A cooling gas inlet 6 is provided on the housing 1 at the front end position corresponding to the air guide groove 5. An exhaust groove 7 is provided on the inner surface of the housing 1 at the tail end position corresponding to the air guide groove 5 to discharge gas to one side of the stator 2. A cooling gas outlet 8 is provided on the housing 1 on the other side of the stator 2.

[0017] The edges of the steel sheet and the steel sheet groove 4 are sealed with sealant to prevent the cooling gas from being directly discharged from the edge of the steel sheet groove 4, ensuring that the cooling gas travels along the air guide groove 5 and improving the cooling effect.

[0018] The shape of the air guide groove 5 includes commonly used shapes in fields such as continuously arranged S-shape, W-shape or spiral shape, which can extend the travel distance of the cooling gas and improve the cooling effect.

[0019] Working principle:

[0020] During operation, external cooling gas enters the air guide groove 5 through the cooling gas inlet 6. Because the steel sheets and steel sheet grooves 4 are fitted together in a sealed manner, and the edges of the steel sheets and steel sheet grooves 4 are sealed with sealant, the air guide groove 5 forms an independent air guide channel. The cooling gas travels along the air guide groove 5, directly cooling the steel sheets of the stator 2. The cooling gas in the air guide groove 5 is discharged through the exhaust groove 7 into the motor cavity on one side of the stator 2, cooling the stator coils on that side. Then, it is discharged through the gap between the stator 2 and the main shaft 3 into the motor cavity on the other side of the stator, cooling the stator coils on that side. Finally, it is discharged outwards through the cooling gas outlet 8. This system not only directly cools the steel sheets and coils on both sides of the stator 2 with good cooling effect, but also promptly carries away heat from inside the motor cavity, preventing heat accumulation and protecting the motor, thus extending its service life.

[0021] The above-described specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0022] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. A motor direct cooling structure of a gas compressor, comprising a motor, a compression pump head connected to an end of the motor, the motor comprising a shell, a stator and a main shaft arranged in the shell, characterized in that: The inner surface of the housing is provided with a steel plate groove along the circumference. The steel plate groove is used to install and fix the steel plates of the stator. The steel plates are fitted and sealed with the steel plate groove. The inner surface of the steel plate groove is provided with a continuous air guide groove, with the beginning and end of the air guide groove spaced apart. A cooling gas inlet is provided on the housing at the front end of the air guide groove. An exhaust groove is provided on the inner surface of the housing at the tail end of the air guide groove to discharge the gas to one side of the stator. A cooling gas outlet is provided on the housing on the other side of the stator.

2. A motor direct cooling structure of a gas compressor according to claim 1, characterized in that: The edges of the steel sheet and the steel sheet groove are sealed with sealant.

3. A motor direct cooling structure of a gas compressor according to claim 1, characterized in that: The shape of the air guide groove includes continuously arranged S-shape, W-shape or spiral shape.

Images