WO2018191990A1

WO2018191990A1 - High-efficiency explosion-proof three-phase asynchronous motor

Info

Publication number: WO2018191990A1
Application number: PCT/CN2017/081571
Authority: WO
Inventors: 张爱娟; 张�浩; 蔡海建
Original assignee: 南通森玛特电机有限公司
Priority date: 2017-04-18
Filing date: 2017-04-24
Publication date: 2018-10-25
Also published as: CN107124066B; CN107124066A

Abstract

A high-efficiency explosion-proof three-phase asynchronous motor, comprising a rotor (1), a stator (2), a motor housing (3), an end cover (4), and a collector ring (5). An end of the motor housing (3) facing the end cover (4) is provided with a hollow damping chamber (31), and an air spring (6) is enclosed in the hollow damping chamber (31). A coolant (7) is filled between the hollow damping chamber (31) and the air spring (6), and a coolant inlet (32) and a coolant adding port (33) are further provided between the motor housing (3) and the hollow damping chamber (31). The coolant inlet (32) and the coolant adding port (33) are respectively connected to a coolant adding device (8). The coolant adding device (8) is further provided with a temperature control device (9), and the temperature control device (9) is connected to a temperature sensor (10) provided in the hollow damping chamber (31) to control the temperature in the hollow damping chamber (31). The air spring (6) comprises a sealed damping section (61), a cooling compression section (62), and an inline connection section (63). The three-phase asynchronous motor features a simple structure, good anti-vibration effect, stable operation, high electromechanical conversion efficiency and a long service life.

Description

High efficiency explosion-proof three-phase asynchronous motor

Technical field

The invention relates to the technical field of explosion-proof of a three-phase asynchronous motor, in particular to a high-efficiency explosion-proof three-phase asynchronous motor.

Background technique

The three-phase asynchronous motor operating as a motor has a rotor whose rotational speed is lower than the rotational speed of the rotating magnetic field, and the rotor winding generates an electromotive force and a current due to a relative movement between the rotor and the magnetic field, and interacts with the magnetic field to generate an electromagnetic torque to realize energy conversion.

Compared with single-phase asynchronous motors, three-phase asynchronous motors have good running performance and can save various materials. According to the rotor structure, three-phase asynchronous motors can be divided into two types: cage type and winding type. The asynchronous motor of the cage rotor has simple structure, reliable operation, light weight and low price, and has been widely used. The main disadvantage is that the speed regulation is difficult. The rotor of the wound-type three-phase asynchronous motor is also provided with a three-phase winding like a stator and is connected to an external varistor through a slip ring and a brush. Adjusting the varistor resistance improves the starting performance of the motor and regulates the speed of the motor.

However, the existing three-phase asynchronous motor generates a certain vibration when it works, affecting the power conversion of the motor and shortening its service life.

Summary of the invention

In order to overcome the above deficiencies of the prior art, the present invention provides an efficient explosion-proof three-phase asynchronous motor capable of effectively solving the vibration of a three-phase asynchronous motor during operation and capable of cooling the ambient temperature of the motor in time.

The technical scheme adopted by the invention is: a high-efficiency explosion-proof three-phase asynchronous motor, comprising a rotor, a stator, a motor casing, an end cover and a collector ring, wherein the motor casing is provided with a hollow cushioning cavity at one end of the end cover. The hollow cushioning chamber is provided with an air spring, and the hollow cushioning chamber and the air spring are filled with a cooling liquid, and a coolant inlet and a coolant adding port are also arranged between the motor casing and the hollow cushioning chamber. The coolant inlet and the coolant addition port are respectively connected to the coolant adding device, and the coolant adding device is further provided with a temperature control device, and the temperature The control device realizes temperature control in the hollow cushioning chamber by connecting a temperature sensor disposed in the hollow cushioning chamber;

The air spring comprises a sealing damper section, a cooling compression section and an inlaid connecting section, wherein the sealing damper section is pressed inside the end cap, and the cooling compression section is inserted into the hollow cushioning chamber and is coupled with the coolant to the motor casing The body achieves shock absorption, and the inline connecting section is movably close to the end position of the hollow cushioning chamber.

Preferably, the end of the air spring and the end cap is provided with at least three shock absorbing assemblies arranged circumferentially along the end of the sealed damper section, each damper assembly comprising a damper shaft and a damper spring, Each of the damping springs is sleeved on the outside of its corresponding damping shaft.

Preferably, one end of each of the shock absorbing members of the shock absorbing assembly is fixed on the end cover, and the other end defines a position of the damper spring thereon through a limiting plate, and the limit plate and the air spring are sealed and damped The end of the segment is in contact.

Preferably, the end cover and the collector ring are respectively sleeved on both ends of the motor housing, and a concave-shaped damping ring is further disposed between the collector ring and the motor housing.

Compared with the prior art, the beneficial effects of the present invention are: the three-phase asynchronous motor of the present invention is provided with a hollow cushioning chamber in the motor casing, and the cushioning chamber is provided with an air spring pair end cover on the one hand The stator and the rotor contact area are damped, and the air enthalpy can also reduce the vibration between the stator and the rotor and the motor housing. In addition, the hollow cushioning chamber of the present invention is further filled with a cooling liquid which can be circulated and cooled by an external coolant adding device, and the cooling liquid is located in the hollow cushioning chamber and is further provided with a temperature sensor, and the temperature sensor will be The data is transmitted to an external temperature control device, and the temperature control device controls the temperature of the coolant addition device, and then the coolant is added, thereby automatically controlling the circulation temperature of the coolant. The control of the temperature of the coolant in the hollow cushioning chamber of the motor housing is also beneficial to improve the stability of the motor operation, and also has a good auxiliary effect on the motor damping.

In summary, the three-phase asynchronous motor of the invention has simple structure, good anti-vibration effect, stable operation, high electromechanical conversion efficiency and long service life.

DRAWINGS

1 is a schematic structural view of an embodiment of a high efficiency explosion-proof three-phase asynchronous motor;

Figure 2 is a view showing the connection structure of the end cover and the air spring of the embodiment of Figure 1;

Figure 3 is a cross-sectional view of the air spring of the embodiment of Figure 1;

Of which: 1-rotor, 2-stator, 3-motor housing, 31-hollow cushioning chamber, 32-coolant inlet, 33-coolant addition port; 4-end cap, 5-collector ring, 6 - air spring, 61-seal shock absorbing section, 62-cooling compression section, 63-inline connection section; 7-coolant, 8-coolant addition device, 9-temperature control device, 10-temperature sensor, 11-minus Shock assembly, 111-damper shaft, 112-damper spring, 113-limit disc; 12-recessed shock ring.

detailed description

The invention will be further described in conjunction with the accompanying drawings and embodiments, which are intended to illustrate the invention and not to limit the scope of the invention.

As shown in FIG. 1, the high-efficiency explosion-proof three-phase asynchronous motor comprises a rotor 1, a stator 2, a motor housing 3, an end cover 4 and a collector ring 5, and the motor housing 3 is hollow toward one end of the end cover 4. In the cushioning chamber 31, the hollow cushioning chamber 31 is covered with an air spring 6, and the hollow cushioning chamber 31 and the air spring 6 are filled with the cooling liquid 7, and the motor housing 3 and the hollow cushioning chamber 31 are A coolant inlet 32 and a coolant addition port 33 are further provided, and the coolant inlet 32 and the coolant addition port 33 are respectively connected to the coolant adding device 8, and the coolant adding device 8 is further provided with a temperature control device 9, and the temperature control device 9 The temperature control in the hollow cushioning chamber 31 is realized by connecting the temperature sensor 10 disposed in the hollow cushioning chamber 31;

As shown in Figures 1 and 3, the air spring 6 includes a seal damper section 61, a cooling compression section 62 and an inline connection section 63, wherein the seal damper section 61 is pressed against the inside of the end cover 4 to cool the compression section 62. The inside of the hollow cushioning chamber 31 is inserted and the motor housing is damped together with the coolant, and the inlaid connecting portion 63 is movably close to the end position of the hollow cushioning chamber 31.

As a more preferred embodiment, as shown in Fig. 2, the ends of the air spring 6 and the end cap 4 are provided with at least three shock absorbing members 11 arranged circumferentially along the end of the seal damper section 61, each damper The assembly 11 includes a damper shaft 111 and a damper spring 112, wherein each of the damper springs 112 is sleeved on the outer side of the corresponding damper shaft 111 to effectively absorb the end cap and the electric rotor and the end cap. The vibration between them improves the stability of its operation.

As a more preferred embodiment, one end of the damper shaft of each of the damper assemblies 11 is fixed to the end cover 4, and the other end defines the position of the damper spring thereon via a limiting plate 113, and the limit plate 113 It is in contact with the end of the air spring 6 along the sealing damper section 61 to ensure better disassembly performance of the end cap during installation, and convenient for routine maintenance and maintenance of the three-phase asynchronous motor.

As a more preferred embodiment, the end cover 4 and the collector ring 5 are respectively sleeved on both ends of the motor housing 3, and a concave-shaped damping ring 12 is further disposed between the collector ring 5 and the motor housing 3. The anti-shock effect of the collector ring and the motor housing is improved.

The embodiments of the present invention are disclosed in the preferred embodiments, but are not limited thereto, and those skilled in the art can easily understand the spirit of the present invention and make various extensions and changes according to the above embodiments. However, it is within the scope of the invention as long as it does not depart from the spirit of the invention.

Claims

High-efficiency explosion-proof three-phase asynchronous motor, comprising: rotor (1), stator (2), motor housing (3), end cover (4) and collector ring (5), motor housing (3) One end facing the end cover (4) is provided with a hollow cushioning chamber (31), and the hollow cushioning chamber (31) is sleeved with an air spring (6), a hollow cushioning chamber (31) and an air spring (6) The coolant (7) is filled between, and a coolant inlet (32) and a coolant addition port (33) are further disposed between the motor casing (3) and the hollow cushioning chamber (31), and the coolant inlet is provided. (32) a coolant addition device (8) is connected to the coolant addition port (33), and the coolant addition device (8) is further provided with a temperature control device (9), and the temperature control device (9) is connected by The temperature sensor (10) in the hollow cushioning chamber (31) realizes temperature control in the hollow cushioning chamber (31);

An air spring (6) includes a sealed damper section (61), a cooling compression section (62), and an inline connection section (63), wherein the seal damper section (61) is pressed against the inside of the end cover (4) to cool The compression section (62) is inserted into the hollow cushioning chamber (31) and is damped to the motor housing together with the coolant, and the inlaid connecting section (63) is movably close to the end of the hollow cushioning chamber (31). position.
The high-efficiency explosion-proof three-phase asynchronous motor according to claim 1, characterized in that the end of the air spring (6) and the end cover (4) are provided at least circumferentially along the end of the seal damper section (61). Three shock absorbing assemblies (11), each of which includes a damping shaft (111) and a damping spring (112), wherein each damping spring (112) is sleeved in its corresponding The outside of the damping shaft (111).
The high-efficiency explosion-proof three-phase asynchronous motor according to claim 2, characterized in that: one end of the damping shaft of each group of shock absorbing assemblies (11) is fixed on the end cover (4), and the other end passes through a limit plate (113). The position of the damper spring thereon is defined while the limit plate (113) is in contact with the end of the air spring (6) along the seal damper section (61).
The high-efficiency explosion-proof three-phase asynchronous motor according to any one of claims 1 to 3, characterized in that the end cover (4) and the collector ring (5) are respectively sleeved at both ends of the motor casing (3), and A concave shaped damping ring (12) is also arranged between the collector ring (5) and the motor housing (3).