Compressor backboard structure capable of reducing temperature of motor and bearing thereof

Abstract

The utility model discloses a compressor back plate structure capable of reducing the temperature of a motor and a bearing thereof, which comprises a back plate body, the back plate body is arranged between a compressor volute and a motor shell, and the back plate body is provided with an exhaust hole used for sucking high-temperature gas leaked by a compressor seal to the outside of the compressor. According to the utility model, high-temperature gas leaked from the compressor seal can be sucked out of the compressor and cannot enter the motor, so that the temperature of the internal structure of the motor is optimized, the service life of the motor is prolonged, and the use efficiency of the motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compressor back plate structure capable of reducing the temperature of a motor and a bearing thereof. Background Art

[0002] High-speed motor direct-drive centrifugal compressors are limited by motor technology and material science. The motor stator and bearings generate a lot of heat during operation, and the temperature remains high. Since the compressor and motor are directly connected, the high-pressure gas leaking from the compressor seal directly enters the motor, further increasing the temperature of the motor stator and bearings, greatly reducing the stability and life of the motor. The existing method of reducing the temperature of the compressor motor is to reduce the temperature of the motor by cleaning the radiator, reducing the load, etc., but this cooling method cannot cool the motor and its bearings at the same time. The high-pressure gas will still affect the temperature of the motor and its bearings, and the cooling effect is limited. Utility Model Content

[0003] In order to overcome the defects of the prior art, a compressor back plate structure is provided which can reduce the temperature of the motor and its bearings, and can solve the problem that the existing motor and its bearing cooling methods have limited effect.

[0004] In order to achieve the above-mentioned technical effect, the solution provided by the utility model is to provide a compressor backplate structure that can reduce the temperature of the motor and its bearings, which includes: a backplate body, the backplate body is installed between the compressor volute and the motor housing, and the backplate body is provided with an exhaust hole for sucking the high-temperature gas leaking from the compressor seal to the outside of the compressor.

[0005] Preferably, the middle portion of the back plate body is sunken to form a groove, and the exhaust holes are radially penetrated through the groove wall.

[0006] Preferably, there are a plurality of exhaust holes, and the plurality of exhaust holes are distributed along the circumference of the groove.

[0007] Preferably, the plurality of exhaust holes are evenly distributed.

[0008] Preferably, at least one of the exhaust holes is connected to an exhaust device via a hose.

[0009] The beneficial effect of the utility model lies in that the utility model provides a compressor back plate structure which can reduce the temperature of the motor and its bearings. By drilling holes on the side of the compressor back plate and connecting the small holes to the exhaust device through a hose, the high-temperature gas leaked from the compressor seal is sucked to the outside of the compressor through the suction of the exhaust device, so that it cannot enter the interior of the motor, thereby optimizing the use environment of the internal structure of the motor, making their own temperature lower, and thus improving the life and use efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 The utility model is a schematic diagram of the overall structure of a compressor back plate structure which can reduce the temperature of a motor and its bearings.

[0012] Figure 2 The utility model is a schematic cross-sectional structure diagram of a compressor back plate structure capable of reducing the temperature of an electric motor and its bearings.

[0013] Figure 3 It is a comparison diagram of the flow routes of high-temperature gas after a common back plate and the back plate of the utility model are installed on a compressor.

[0014] Figure 4 The utility model discloses a flow route diagram of high-temperature gas after a compressor back plate capable of reducing the temperature of a motor and its bearings is installed on a compressor.

[0015] The corresponding relationship of the numbers in the figure is as follows:

[0016] 1-motor housing; 2-motor stator; 3-radial bearing; 4-radial sensor; 5-auxiliary bearing; 6-compressor back plate; 601-exhaust hole; 602-comb seal; 7-volute; 8-impeller; 9-high-temperature gas flow path of the back plate of the utility model; 10-high-temperature gas flow path of the ordinary back plate; 11-motor; 12-compressor; 13-exhaust equipment. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] like Figure 3 As shown in FIG. 1 , the commonly used high-speed motor direct-driven centrifugal compressor structure includes a motor housing 1, a motor stator 2, a radial bearing 3, a radial sensor 4, an auxiliary bearing 5, a compressor volute 7, and a compressor impeller 8. The high-temperature gas leaked from the shaft seal all flows into the high-speed motor (i.e. Figure 1The high-temperature gas streamline diagram in the middle and lower parts) has a great influence on the performance of the motor and its bearings. The utility model optimizes the compressor back plate structure to discharge all the high-temperature gas leaked from the shaft seal to the outside, effectively improving the operating environment of the high-speed motor.

[0019] See also Figures 1 to 3 As shown, the embodiment of the utility model provides a compressor back plate structure that can reduce the temperature of the motor and its bearings, including: a back plate body 6 is installed between the compressor volute 7 and the motor housing 1, and an exhaust hole 601 is opened on the back plate body 6 for sucking the high-temperature gas leaking from the compressor seal to the outside of the compressor. A comb seal 602 is provided on the back plate body 6.

[0020] As a preferred implementation, Figure 1 to Figure 2 As shown, the middle of the back plate body 6 is sunken to form a groove, and the groove wall is radially penetrated to form an exhaust hole 601.

[0021] As a preferred implementation, there are multiple exhaust holes 601, and the multiple exhaust holes 601 are distributed along the circumference of the groove.

[0022] As a preferred implementation, the plurality of exhaust holes 601 are evenly distributed.

[0023] The opening position, number and diameter of the exhaust hole 601 should be selected after strict calculation, without increasing the axial size of the back plate, to ensure that the strength of the back plate is sufficient and the total gas diffusion area of ​​the exhaust hole 601 can completely discharge the gas leaked from the compressor seal.

[0024] As a preferred embodiment, at least one exhaust hole 601 is connected to the exhaust device 13 via a hose. The exhaust device 13 can be an exhaust fan or an exhaust blower.

[0025] like Figure 3 The upper part of the hot gas streamline 9 and Figure 4 As shown, the back plate structure of the utility model is installed between the compressor volute 7 and the motor housing 1. The high-temperature gas leaking from the compressor seal is sucked to the outside of the compressor through the suction of the exhaust device 13, so that it cannot enter the inside of the motor, thereby optimizing the use environment of the stator, bearings, sensors and other parts inside the motor, making their own temperature lower, thereby improving the life and use efficiency of the motor.

[0026] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A compressor back plate structure capable of reducing the temperature of a motor and its bearings, characterized in that: include: The back plate body is installed between the compressor volute and the motor housing, and the back plate body is provided with an exhaust hole for sucking the high temperature gas leaking from the compressor seal to the outside of the compressor.

2. The compressor back plate structure capable of reducing the temperature of the motor and its bearings as claimed in claim 1, characterized in that: The middle part of the back plate body is sunken to form a groove, and the groove wall is radially penetrated to form the exhaust hole.

3. The compressor back plate structure capable of reducing the temperature of the motor and its bearings as claimed in claim 2, characterized in that: There are multiple exhaust holes, and the multiple exhaust holes are distributed along the circumference of the groove.

4. The compressor back plate structure capable of reducing the temperature of the motor and its bearings as claimed in claim 2, characterized in that: The plurality of exhaust holes are evenly distributed.

5. The compressor back plate structure capable of reducing the temperature of the motor and its bearings as claimed in claim 2, characterized in that: At least one of the exhaust holes is connected to an exhaust device via a hose.

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