A magnetic levitation steam compressor

Abstract

The present invention relates to a magnetic levitation steam compressor, which includes a stator housing, a stator, and a rotor. The stator is disposed inside the housing; the rotor is disposed inside the stator. The stator includes a positioning disk, a radial magnetic bearing stator, a stator winding, and a framework. There are multiple positioning disks and axial magnetic bearing stators, and they are disposed inside the framework. The present invention has the beneficial effects that the overall design structure is compact, effectively reducing the volume and axial length of the system, having a wider application range, and lower energy consumption; steam flows through the rotor shaft, and multiple impellers can be designed inside the rotating shaft to accelerate the steam multiple times, thereby further improving the compressor efficiency; the design of the axial and radial protection bearings plays a buffering role in case of sudden abnormal situations such as power failure or sensor failure, ensuring that the motor will not be abnormally worn, thereby improving its use stability and service life.

Description

Technical Field

[0001] The present invention relates to the technical field of steam compressors, and more particularly to a magnetic levitation steam compressor. Background Art

[0002] Compared with traditional steam compressors, magnetic levitation steam compressors use electromagnetic force on the rotor to levitate the rotating shaft, and the rotating shaft and the stator remain in a non-contact state. Therefore, they have the advantages of no wear, high speed, high precision, long service life, and low noise. Existing magnetic levitation steam compressors usually have the same structure as traditional compressors, that is, the motor housing and the current collection system are separately arranged at both ends. This design method occupies a relatively large space and limits the applicable range of magnetic levitation steam compressors. Therefore, developing a magnetic levitation steam compressor with a compact structure and small volume is an important research direction in the field of magnetic levitation motors. Summary of the Invention

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a magnetic levitation steam compressor.

[0004] The above object of the present invention is achieved by the following technical solutions:

[0005] A magnetic levitation steam compressor includes a stator housing, a stator, and a rotor. The stator is arranged inside the housing; the rotor is arranged inside the stator. The stator includes a positioning disk, a radial magnetic bearing stator, a stator winding, and a skeleton. There are multiple positioning disks and axial magnetic bearing stators, and they are arranged inside the skeleton; the stator winding is arranged inside the skeleton. The rotor includes a rotating shaft, a shaft sleeve, a radial magnetic bearing rotor, and an axial magnetic bearing rotor. A first channel is arranged inside the rotating shaft; the shaft sleeve is fixedly sleeved outside the rotating shaft. The radial magnetic bearing rotor and the axial magnetic bearing rotor are both sleeved outside the rotating shaft, and the radial magnetic bearing rotor is arranged in cooperation with the radial magnetic bearing stator, the axial magnetic bearing rotor is arranged in cooperation with the positioning disk, and the rotor winding is arranged in cooperation with the stator winding.

[0006] Through the above technical solutions: The overall design structure is compact, effectively reducing the volume and axial length of the system, with a wider applicable range and lower energy consumption; steam flows through the inside of the rotor shaft, and multiple impellers can be designed inside the rotating shaft to accelerate the steam multiple times, thereby further improving the compressor efficiency; the design of axial and radial protective bearings plays a buffering role in case of sudden abnormal situations such as power failure or sensor failure, ensuring that the motor will not be abnormally worn, thereby improving its use stability and service life.

[0007] The present invention is further designed such that: a first impeller is provided at the upper end of the rotor, and the lower end of the first impeller is fixedly connected to the upper end of the rotating shaft; a fairing is provided at the upper end of the stator, and the inner cavity of the fairing is connected in cooperation with the first impeller.

[0008] Through the above technical solution: The first impeller rotates with the rotor and compresses the steam in cooperation with the fairing.

[0009] The present invention is further designed such that: a second impeller is embedded inside the rotating shaft.

[0010] Through the above technical solution: The compression efficiency of the steam is further improved.

[0011] The present invention is further designed such that: there are multiple second impellers, and the inner diameter gradually decreases along the steam flow direction.

[0012] Through the above technical solution: During the process of the steam passing through the first channel, the steam is gradually accelerated and compressed, further improving the compression efficiency.

[0013] The present invention is further designed such that: an axial coil is embedded on one side of the axial magnetic bearing rotor close to the positioning disk.

[0014] Through the above technical solution: The cooperation between the axial coil and the positioning disk limits the operation of the rotor in the axial direction.

[0015] The present invention is further designed such that: a limiting ring is provided on the outside of the axial magnetic bearing rotor.

[0016] Through the above technical solution: The limiting ring plays a role in limiting the axial magnetic bearing rotor, further ensuring the stability of the operation.

[0017] The present invention is further designed such that: limiting rings are embedded at both ends of the skeleton, axial protection bearings and radial protection bearings are embedded inside the limiting rings, the axial protection bearings are connected in cooperation with the limiting ring, and the radial protection bearings are connected in cooperation with the shaft sleeve.

[0018] Through the above technical solution: It plays a buffering role in case of sudden abnormal situations such as power failure or sensor failure, ensuring that the motor will not be abnormally worn, thereby improving its use stability and service life.

[0019] The present invention is further designed such that: sensors are provided at the mating part of the radial magnetic bearing rotor and the radial magnetic bearing stator and at the axial magnetic bearing rotor and the positioning disk.

[0020] Through the above technical solution: The sensors can timely feedback the gap data during the operation of the rotor and the stator, thereby adjusting the magnetic force to ensure the stability of the operation.

[0021] The present invention is further designed such that an intake pipe is rotatably connected to the lower end of the rotor.

[0022] Through the above technical solution, steam enters through the intake pipe, and the intake pipe and the rotor are rotatably connected through a sealed slip ring.

[0023] The present invention is further designed such that the lower end of the fairing is conical and is disposed inside the first channel; an outlet pipe is further provided on the fairing.

[0024] In summary, the beneficial technical effects of the present invention are as follows:

[0025] 1. The overall design has a compact structure, effectively reducing the volume and axial length of the system, with a wider application range and lower energy consumption; 2. Steam flows through the rotor shaft, and multiple impellers can be designed inside the shaft to accelerate the steam multiple times, thereby further improving the compressor efficiency; 3. The design of the axial and radial protective bearings plays a buffering role in case of sudden abnormal situations such as power failure or sensor failure, ensuring that the motor will not be abnormally worn, thereby improving its service stability and lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a magnetic levitation steam compressor.

[0027] Figure 2 is Figure 1 a partial enlarged schematic diagram of part A in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Refer to Figure 1-2, is a magnetic levitation steam compressor disclosed in the present invention, comprising a stator housing 1, a stator 2, and a rotor 3, wherein the stator 2 is arranged inside the housing 1; the rotor 3 is arranged inside the stator 2, the stator 2 comprises a positioning disk 21, a radial magnetic bearing stator 22, a stator winding 23, and a skeleton 24, wherein the positioning disk 21 and the axial magnetic bearing stator 22 are both in plurality and are arranged inside the skeleton 24; the stator winding 23 is arranged inside the skeleton 24, the rotor 3 comprises a rotating shaft 31, a sleeve 32, a radial magnetic bearing rotor 33, and an axial magnetic bearing rotor 34, the rotating shaft 31 is provided with a first channel 311, and the first channel 311 is arranged inside the rotating shaft 31. The first passage 311 is embedded with a second impeller 312, and the second impeller 312 is provided with a plurality of impellers, and the inner diameter gradually decreases along the steam flow direction; the lower end of the rotor 31 is rotatably connected with an air inlet pipe 313; the sleeve 32 is fixedly sleeved on the outside of the rotating shaft 31, the radial magnetic bearing rotor 33 and the axial magnetic bearing rotor 34 are both sleeved on the outside of the rotating shaft 31, and the radial magnetic bearing rotor 33 is matched with the radial magnetic bearing stator 22, the axial magnetic bearing rotor 34 is matched with the positioning disk 21, and the axial magnetic bearing rotor 34 is embedded with an axial coil 341 on the side close to the positioning disk 21. The upper end of the rotor 3 is provided with a first impeller 36, and the lower end of the first impeller 36 is fixedly connected to the upper end of the rotating shaft 31; the upper end of the stator 2 is provided with a fairing 25, and the inner cavity of the fairing 25 is matched with the first impeller 36.

[0030] A limiting ring 342 is arranged on the outside of the axial magnetic bearing rotor 34, limiting rings 241 are embedded at both ends of the skeleton 24, an axial protective bearing 242 and a radial protective bearing 243 are embedded on the inside of the limiting ring 241, the axial protective bearing 242 is connected with the limiting ring 342, and the radial protective bearing 243 is connected with the shaft sleeve 32.

[0031] Sensors are provided at the joints between the radial magnetic bearing rotor 33 and the radial magnetic bearing stator 22 and at the joints between the axial magnetic bearing rotor 34 and the positioning plate 21 .

[0032] The lower end of the fairing 25 is conical and is arranged inside the first channel 311; the fairing 25 is also provided with an air outlet pipe (251).

[0033] The implementation principle of this embodiment is: based on the above mechanism foundation, such as Figure 1-2As shown, after power-on startup, the rotor 33 of the radial magnetic bearing cooperates with the stator 22 of the radial magnetic bearing, and the rotor is centered radially; the rotor of the axial magnetic bearing 34 cooperates with the positioning disk 21, and the rotor is in a suspended state axially; the rotor winding 35 cooperates with the stator winding 23 to drive the rotor to rotate. During the rotation of the rotor, the gap between the stator and the rotor is sensed in real time by a sensor, and the electromagnetic force is adjusted in a timely manner. Steam enters the first passage 311 through the inlet pipe 313, is gradually accelerated by the second impeller 312 inside the first passage 311, enters the first impeller 36, and is discharged from the outlet pipe 251 after being accelerated and compressed by the first impeller 36.

[0034] When an abnormal sudden shutdown such as power failure of the compressor occurs, the axial protection bearing 242 is connected in cooperation with the limit ring 342 to buffer the rotation in the axial direction; the radial protection bearing 243 cooperates with the bushing 32 to buffer the rotation in the radial direction, thereby alleviating the grinding wear of the rotor when it continues to rotate due to inertia and improving the service life of the compressor.

[0035] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A magnetic levitation steam compressor, comprising a stator housing (1), a stator (2), and a rotor (3), characterized in that, The stator (2) is arranged inside the housing (1); the rotor (3) is arranged inside the stator (2). The stator (2) includes a positioning disk (21), a radial magnetic bearing stator (22), a stator winding (23), and a framework (24). There are multiple positioning disks (21) and radial magnetic bearing stators (22), and they are arranged inside the framework (24); the stator winding (23) is arranged inside the framework (24). The rotor (3) includes a rotating shaft (31), a shaft sleeve (32), a radial magnetic bearing rotor (33), an axial magnetic bearing rotor (34), and a rotor winding (35). A first channel (311) is arranged inside the rotating shaft (31); the shaft sleeve (32) is fixedly sleeved outside the rotating shaft (31). The radial magnetic bearing rotor (33) and the axial magnetic bearing rotor (34) are both sleeved outside the rotating shaft (31), and the radial magnetic bearing rotor (33) is arranged in cooperation with the radial magnetic bearing stator (22), and the axial magnetic bearing rotor (34) is arranged in cooperation with the positioning disk (21); the rotor winding (35) is arranged in cooperation with the stator winding (23); limiting rings (241) are embedded at both ends of the framework (24), and an axial protection bearing (242) and a radial protection bearing (243) are embedded inside the limiting rings (241). A limiting ring (342) is arranged outside the axial magnetic bearing rotor (34), and the axial protection bearing (242) is connected in cooperation with the limiting ring (342), and the radial protection bearing (243) is connected in cooperation with the shaft sleeve (32).

2. The magnetic levitation steam compressor according to claim 1, wherein A first impeller (36) is arranged at the upper end of the rotor (3), and the lower end of the first impeller (36) is fixedly connected to the upper end of the rotating shaft (31); a fairing (25) is arranged at the upper end of the stator (2), and the inner cavity of the fairing (25) is connected in cooperation with the first impeller (36).

3. The magnetic levitation steam compressor according to claim 2, wherein A second impeller (312) is embedded inside the rotating shaft (31).

4. The magnetic levitation steam compressor according to claim 3, wherein There are multiple second impellers (312), and the inner diameter gradually decreases along the steam flow direction.

5. The magnetic levitation steam compressor according to claim 1, characterized in that, An axial coil (341) is embedded on one side of the axial magnetic bearing rotor (34) close to the positioning disk (21).

6. The magnetic levitation steam compressor according to claim 2, characterized in that Sensors are arranged at the cooperation position between the radial magnetic bearing rotor (33) and the radial magnetic bearing stator (22) and at the position where the axial magnetic bearing rotor (34) and the positioning disk (21) are in contact.

7. The magnetic levitation steam compressor according to claim 1, characterized in that An intake pipe (313) is rotatably connected to the lower end of the rotor (31).

8. The magnetic levitation steam compressor according to claim 2, wherein The lower end of the fairing (25) is conical and is arranged inside the first channel (311); an exhaust pipe (251) is also arranged on the fairing (25).

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