CN205319810U - A cooling body for covering stator in formula motor - Google Patents

Abstract

The utility model discloses a cooling body for covering stator in formula motor relates to motor technical field, including casing protecgulum and hou gai the center of casing is equipped with rotor and stator, the stator includes coil and iron core the coil with be equipped with oil pipe between the iron core, the iron core with by the baffle separation, form stator cavity and the rotor cavity body between the rotor be equipped with entry and export on the casing, through the mode that adopts the coolant oil to get into oil pipe and stator cavity, cool off the stator, can promote the radiating efficiency, the work efficiency of promotion motor.

Description

A cooling mechanism for stator in oil-immersed motor

technical field

The utility model relates to the technical field of motors, in particular to a cooling mechanism for cooling a stator in an oil-immersed motor.

Background technique

At present, there are many kinds of rotating electrical machines on the market, and their structure is a combination of stator and rotor, that is, the electric energy of the stator coil is converted into the rotational kinetic energy of the rotor through the magnetic field, so as to realize the conversion from electrical energy to mechanical energy. To achieve a certain efficiency of energy conversion, part of the loss will be dissipated to the surrounding environment in the form of heat through various channels.

The heat dissipation of the motor mainly includes air cooling and liquid cooling. Air cooling can be divided into natural air cooling and fan cooling. It is to conduct the heat inside the motor to the casing, or expose the stator and rotor to the air, and then rely on Air flows to dissipate heat; while liquid cooling requires cooling oil or cooling water to pass through the pipes or cavities in the casing to transfer the heat from the inside of the motor to the casing, thereby reducing the temperature inside the motor.

The air-cooled heat dissipation method is adopted. Since the rotor and stator of the motor are not completely wrapped by the casing, it cannot be used in a humid or water-splashing environment; the internal stator and rotor of the liquid-cooled motor are in the same cavity, and the inner surface of the stator and the rotor The gap on the outer surface must be small enough not to affect the magnetic field coupling. It is difficult to divide the cavity with a structure. Such an integral cavity makes the heat dissipation structure of the motor tend to be based on the contact heat conduction between the stator and the shell and the liquid in the shell. Heat transfer is used to achieve heat dissipation, but due to the gap between the stator and the casing and the limited number of liquid pipes, such heat dissipation is often not efficient.

To sum up, how to provide a liquid-cooled motor for efficient heat dissipation becomes a problem to be solved in the present invention.

Utility model content

In order to solve the above technical problems, the utility model provides a cooling mechanism for the stator of the oil-immersed motor, which can completely immerse the stator in the cooling oil, so as to ensure that the coil and the iron core components are fully cooled without dead ends. Ensure that the stator can run safely for a long time under the set temperature conditions, so as to ensure that the entire motor can output power at full load for a long time.

The technical scheme of the utility model is as follows:

A cooling mechanism for a stator in an oil-immersed motor, comprising a housing, a front cover is provided at one end of the housing, and a rear cover is provided at the other end, so that the inside of the housing forms a sealed structure, and the inside of the housing is sealed. The center of the housing is provided with a rotor, the rotor is connected with a rotating shaft, the rotating shaft passes through the front cover or the rear cover, and is connected between the rotating shaft and the front cover or the rear cover through the rotating shaft. The contact is used to fix the position of the rotating shaft so that the rotating shaft will not deviate from the center during the rotation.

A stator is connected to the inner surface of the housing, the stator includes a coil and an iron core, an oil pipe is arranged between the coil and the iron core, and the extension direction of the oil pipe is in line with the extension direction of the iron core consistent; the iron core and the rotor are separated by a partition, one end of the partition is connected to the front cover, and the other end is connected to the rear cover, through the partition, the The space between the iron cores is the stator cavity, and the space between the iron core and the outer surface of the rotor is the rotor cavity.

There is a certain space between the front cover or the rear cover and the stator, and the space is connected with the stator cavity, and a through hole is opened on the housing, which is connected with the space , so that one side forms the inlet and the other side forms the outlet.

During the use of the utility model, the cooling oil is injected into the through hole through the oil pump, and the cooling oil enters the space between the front cover or the rear cover and the housing through the through hole inside, then through the stator cavity, into the space between the rear cover or the front cover and the housing, and flow out through the outlet, in the process, due to the There is a partition between them, and the cooling oil can be prevented from entering the rotor cavity through the partition. In addition, when the cooling oil flows in the stator cavity, it can penetrate into the oil pipe, and the oil pipe can pass through the oil pipe. Further realize heat exchange and improve heat dissipation efficiency.

Further, a sealing ring is sleeved on the end of the front cover or the rear cover, the partition is connected to the front cover or the rear cover through the sealing ring, and the sealing ring and the rear cover The cooperation of the partitions can completely isolate the rotor cavity from the stator cavity, preventing the cooling oil from leaking into the rotor cavity.

Furthermore, the front cover or the rear cover has a stepped structure, wherein the position of the first step is connected to the housing through a positioning ring, which can improve the sealing effect, and at the same time help to reduce the weight and maximize the expansion. The space between the front cover or the rear cover and the casing can not only reduce weight and cost, but also increase capacity.

Preferably, the oil pipe is made of glass fiber or carbon fiber, or a composite material based on the glass fiber or the carbon fiber. Since the stator cavity has a certain pressure, the inside of the rotor cavity is atmospheric pressure, which is much smaller than that of the stator cavity. Therefore, the oil pipe needs to withstand a certain pressure. Since it needs to be in contact with the oil for a long time, the structure needs to have excellent chemical stability, corrosion resistance, and high temperature resistance; in this technical solution, the stator and rotor The distance between the coupling surfaces is very small, which requires a thinner pipe wall; at the same time, the oil pipe needs to have strong insulation and cannot be magnetically conductive. By using the oil pipe formed of glass fiber or carbon fiber, it can not only meet the above conditions, but also has A certain force strength and rigidity can fully meet the conditions during assembly and improve the success rate of assembly. In addition, the oil pipe also has good thermal stability, dimensional stability and flame resistance.

Beneficial effects: the utility model has the following technical effects through the above technical solutions:

1. It can effectively ensure the rapid cooling of the entire stator structure, which is conducive to the long-term efficient operation of the stator and provides sufficient output power for the motor;

2. By using cooling oil to directly cool the stator, the traditional heat dissipation method has been changed and the heat dissipation efficiency has been improved.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic cross-sectional structure diagram of a cooling mechanism for a stator in an oil-immersed motor disclosed in an embodiment of the present invention.

The corresponding part names indicated by numbers and letters in the figure:

1. Shell; 2. Front cover; 3. Back cover; 4. Coil; 5. Iron core; 6. Oil pipe; 7. Partition; 8. Rotor; 9. Stator cavity; 10. Rotor cavity; 11 , sealing ring; 12, bearing; 13, inlet; 14, outlet; 15, rotating shaft.

detailed description

The technical solutions in the embodiments of the present invention will be described in detail below in conjunction with the drawings in the embodiments of the present invention.

A cooling mechanism for a stator in an oil-immersed motor, comprising a housing 1, a front cover 2 is installed on the left end of the housing 1, and a rear cover 3 is installed on the right end, so that the inside of the housing 1 forms a A relatively closed space, in which a rotor 8 is arranged, the rotor 8 is connected with a rotating shaft 15, and the rotating shaft 15 passes through the front cover 2 or the rear cover 3 and extends horizontally to the housing 1 Outside, a bearing 12 is provided between the rotating shaft 15 and the front cover 2 or the rear cover 3, and the rotor 8 can be positioned through the bearing 12 on the one hand, and on the other hand, it can be quickly turn.

A stator is connected to the inner surface of the housing 1, the stator includes a coil 4 and an iron core 5, an oil pipe 6 is arranged between the coil 4 and the iron core 5, and the oil pipe 6 is connected to the iron core 5. The core 5 extends in the same direction, and the iron core 5 and the rotor 8 are separated by a partition 7. One end of the partition 7 is connected to the front cover 2, and the other end is connected to the rear cover 3. Next, the space between the partition 7 and the iron core 5 is the stator cavity 9 , and the space between the partition 7 and the rotor 8 is the rotor cavity 10 .

There is a certain space between the front cover 2 or the rear cover 3 and the stator, and the space is connected to the stator cavity 9, and a through hole is opened on the housing 1 to connect with the space The through hole on the side close to the front cover 2 forms an inlet 13, and the through hole on the side close to the back cover 3 forms an outlet 14, and the front cover 2 and the back cover 3 are stepped. structure, in this embodiment, both the front cover 2 and the rear cover 3 are provided with two steps, wherein the first step is connected to the housing 1 through a positioning ring, so that the housing 1 can be closely connected with the front cover 2 or the rear cover 3; the end of the second step is sleeved with a sealing ring 11, and the partition 7 is in contact with the sealing ring 11, so that the stator The cavity 9 is isolated from the rotor cavity 10 .

During the cooling process, the cooling oil is injected into the space formed by the front cover 2 and the housing 1 through the oil pump from the through hole, and the cooling oil can flow from the space to the space formed by the pressure of the oil pump. In the stator cavity 9, then flow into the space between the housing 1 and the rear cover 3, and finally flow out from the outlet 14, the housing 1, the partition 7 and the iron core 5 The generated heat can be taken away by the cooling oil. During this process, the cooling oil can flow into the oil pipe 6 through osmosis. By flowing in the oil pipe 6, the coil 4 and the oil pipe 6 can be connected together. The heat between the iron cores 5 is taken away to realize rapid heat dissipation of the entire stator.

In this embodiment, the oil pipe 6 is preferably made of glass fiber material, which has the advantages of high temperature resistance and corrosion resistance, and has a certain permeability, so that the cooling oil can flow freely during the contact process of the cooling oil. The temperature of the coil 4 and the iron core 5 can be rapidly lowered.

The above is only the preferred embodiment of the utility model, it should be pointed out that, for those of ordinary skill in the art, without departing from the inventive concept of the utility model, some deformations and improvements can also be made. Belong to the protection scope of the utility model.

Claims (4)

1. A cooling mechanism for a stator in an oil-immersed motor, comprising a housing, a front cover and a rear cover are respectively provided at both ends of the housing, and a rotor is provided at the center of the housing, so The rotor is connected with a rotating shaft, and the rotating shaft is in contact with the front cover or the rear cover through the rotating shaft. It is characterized in that a stator is connected to the inner surface of the housing, and the stator includes a coil and an iron core. , an oil pipe consistent with the extension direction of the iron core is provided between the coil and the iron core; the iron core and the rotor are separated by a partition, and one end of the partition is connected to the The front cover is connected, and the other end is connected with the rear cover, the space between the partition and the iron core is a stator cavity, and the space between the partition and the rotor is a rotor cavity; There is a certain space between the front cover or the rear cover and the stator, and the space is connected with the stator cavity, and a through hole is opened on the housing, which is connected with the space, so that one side forms a entrance, and the other side forms the exit. 2. The cooling mechanism according to claim 1, wherein a sealing ring is sleeved on the end of the front cover or the rear cover, and the partition is connected to the front cover or the rear cover through the sealing ring. The back covers are connected. 3 . The cooling mechanism according to claim 2 , wherein the front cover or the rear cover has a stepped structure, and a position of the first step is connected to the housing through a positioning ring. 4 . 4. The cooling mechanism according to claim 1, wherein the oil pipe is made of glass fiber or carbon fiber, or a composite material based on the glass fiber or the carbon fiber.