CN216490115U

CN216490115U - Water-cooled permanent magnet drum motor

Info

Publication number: CN216490115U
Application number: CN202220025379.1U
Authority: CN
Inventors: 李和良; 吴伟明; 陈幸; 阮森杰
Original assignee: Zhuji H&c Hiest Motor Co ltd
Current assignee: Zhuji H&c Hiest Motor Co ltd
Priority date: 2022-01-05
Filing date: 2022-01-05
Publication date: 2022-05-10
Anticipated expiration: 2032-01-05

Abstract

The utility model provides a water-cooled permanent magnet drum motor, it includes: fixed base, rotor cylinder, stator, main shaft and connecting cylinder. The rotor roller and the stator are arranged on the fixed base through the main shaft, the rotor roller is rotatably arranged on the main shaft, the rotor roller is of a hollow structure, the stator is contained in the rotor roller, the stator is sleeved on the connecting cylinder, and the connecting cylinder is sleeved on the main shaft. A water flow channel is formed in the main shaft, a heat exchange cavity is formed in the connecting cylinder, and the water flow channel is communicated with the heat exchange cavity. The main shaft is provided with a water inlet pipe which is communicated with the heat exchange cavity. Wherein, the water inlet pipe is arranged through the main shaft and is contained in the water flow channel; the inlet tube passes through inlet tube and heat exchange cavity intercommunication, and rivers passageway passes through outlet pipe and heat exchange cavity intercommunication. The utility model discloses a water-cooled permanent magnet drum motor can make the stator in it obtain effectual cooling heat dissipation through water-cooled mode, avoids stator operating temperature too high to improve life.

Description

Water-cooled permanent magnet drum motor

Technical Field

The utility model relates to a cylinder motor technical field especially relates to a water-cooled permanent magnet cylinder motor.

Background

The roller motor is often used as a power source for belt conveying, has the characteristics of excellent performance, reliable operation, convenient maintenance and the like, and is widely applied to industries such as metallurgy, mine, papermaking, chemical industry and the like. The roller motor usually adopts an inner stator structure, and the roller motor with the inner stator structure has a compact inner structure, so that the heat dissipation area of the inner stator is smaller than that of an outer stator structure, heat in the roller motor is not easy to dissipate, heat in the roller motor is accumulated, the temperature is too high when the roller motor runs, and the inner stator is damaged.

Therefore, how to design a water-cooled permanent magnet drum motor to effectively cool and radiate the stator therein and avoid the overhigh working temperature of the stator, thereby prolonging the service life of the stator, which is a technical problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, provide a water-cooled permanent magnet drum motor, make the stator in it obtain effectual cooling heat dissipation, avoid stator operating temperature too high to improve stator life.

The purpose of the utility model is realized through the following technical scheme:

a water-cooled permanent magnet drum motor, comprising: the device comprises a fixed base, a rotor roller, a stator, a main shaft and a connecting cylinder; the rotor roller and the stator are mounted on the fixed base through the main shaft, the rotor roller is rotatably arranged on the main shaft, the rotor roller is of a hollow structure, the stator is accommodated in the rotor roller, the stator is sleeved on the connecting cylinder, and the connecting cylinder is sleeved on the main shaft;

the main shaft is provided with a water flow channel, the connecting cylinder is provided with a heat exchange cavity, and the water flow channel is communicated with the heat exchange cavity; the main shaft is provided with a water inlet pipe, and the water inlet pipe is communicated with the heat exchange cavity.

In one embodiment, the water inlet pipe is arranged through the main shaft and is accommodated in the water flow channel; the water inlet pipe is communicated with the heat exchange cavity through an inlet pipe, and the water flow channel is communicated with the heat exchange cavity through an outlet pipe.

In one embodiment, the inner wall of the rotor drum is provided with a permanent magnet, the stator comprises an induction core, the induction core is sleeved on the connecting cylinder, and the induction core is matched with the permanent magnet.

In one embodiment, end covers are arranged at two ends of the rotor drum, the main shaft penetrates through the end covers, and a bearing is arranged between the main shaft and the end covers.

In one embodiment, the main shaft is provided with a wiring channel, and the wiring channel is arranged at one end far away from the water flow channel.

In one embodiment, the axis of the inlet pipe is perpendicular to the central axis of the main shaft, and the axis of the outlet pipe is perpendicular to the central axis of the main shaft; the inlet pipe is below the outlet pipe.

In one embodiment, a guide vane is arranged in the heat exchange cavity and extends along the central axis direction of the main shaft; the guide vanes are distributed in an annular array by taking the central axis of the main shaft as a center.

In one embodiment, an isolation inner cylinder is arranged in the connecting cylinder, and the heat exchange cavity is positioned between the cylinder wall of the connecting cylinder and the isolation inner cylinder.

To sum up, the utility model discloses a water-cooled permanent magnet drum motor can make stator in it obtain effectual cooling heat dissipation through water-cooled mode, avoids stator operating temperature too high to improve stator life.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a water-cooled permanent magnet drum motor according to the present invention;

fig. 2 is a partial sectional view of the water-cooled permanent magnet drum motor shown in fig. 1;

fig. 3 is a sectional view of the water-cooled permanent magnet drum motor shown in fig. 1;

FIG. 4 is a partial cross-sectional view (one) of the spindle in structural relationship to the connector barrel;

FIG. 5 is a partial sectional view of the structural relationship of the spindle to the connector barrel;

fig. 6 is a sectional view of a water-cooled permanent magnet drum motor according to another embodiment.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a water-cooled permanent magnet drum motor 10, as shown in fig. 1 and fig. 2, it includes: a fixed base 100, a rotor drum 200, a stator 300, a main shaft 400, and a connection cylinder 500. The rotor drum 200 and the stator 300 are mounted on the fixed base 100 through the main shaft 400, the rotor drum 200 is rotatably disposed on the main shaft 400, the rotor drum 200 is a hollow structure, the stator 300 is accommodated in the rotor drum 200, the stator 300 is sleeved on the connecting cylinder 500, and the connecting cylinder 500 is sleeved on the main shaft 400. As shown in fig. 3, the main shaft 400 is provided with a water flow passage 410, the connecting cylinder 500 is provided with a heat exchange chamber 510, and the water flow passage 410 is communicated with the heat exchange chamber 510; and the main shaft 400 is provided with a water inlet pipe 420, and the water inlet pipe 420 is communicated with the heat exchange chamber 510.

When in use, the stator 300 generates heat and transfers the heat to the connecting cylinder 500, and the cooling liquid enters the heat exchange cavity 510 from the water inlet pipe 420; in the heat exchange cavity 510, the coolant exchanges heat with the connecting cylinder 500, that is, the coolant takes away heat from the connecting cylinder 500; the warmed coolant then flows out of the heat exchange chamber 510 from the water flow passage 410. The specific process will be explained in the following working principle.

In this embodiment, as shown in fig. 3, the permanent magnet 210 is disposed on the inner wall of the rotor drum 200, the stator 300 includes an inductive core 310, the inductive core 310 is sleeved on the connecting cylinder 500, and the inductive core 310 is adapted to the permanent magnet 210. Further, end caps 220 are disposed at two ends of the rotor drum 200, the main shaft 400 is disposed through the end caps 220, and a bearing (not shown) is disposed between the main shaft 400 and the end caps 220 for reducing a friction coefficient between the main shaft 400 and the end caps 220. Furthermore, one of the end caps 220 is formed with an air hole (not shown) for balancing air pressure inside and outside the rotor drum 200. Preferably, the main shaft 400 is provided with a wiring channel 430, and the wiring channel 430 is located at one end far away from the water flow channel 410, so that the water path can be separated from the circuit as far as possible, and the risk of short circuit caused by water and electricity contact is reduced.

As shown in fig. 3, the water inlet pipe 420 and the water flow channel 410 of the water-cooled permanent magnet drum motor 10 of the present invention are disposed on the same side of the main shaft 400, so as to reduce the difficulty of arranging the pipeline, and avoid the water flow channel 410 from running through the main shaft 400, thereby reducing the strength of the main shaft 400. In the present embodiment, as shown in fig. 3, the water inlet pipe 420 is inserted into the main shaft 400 and is received in the water flow channel 410, and the water inlet pipe 420 is communicated with the heat exchange chamber 510 through the inlet pipe 421, and the water flow channel 410 is communicated with the heat exchange chamber 510 through the outlet pipe 411. Thus, the coolant of the inlet pipe 420, which enters the heat exchange chamber 510 through the inlet pipe 421, may be guided to the inner wall of the connector 500, thereby achieving better heat exchange.

Preferably, as shown in fig. 3, the axis of the inlet pipe 421 is perpendicular to the central axis of the main shaft 400, the axis of the outlet pipe 411 is perpendicular to the central axis of the main shaft 400, and the inlet pipe 421 is located below the outlet pipe 411. Thus, when the coolant enters the heat exchange chamber 510 from the inlet pipe 421, the coolant preferably collects under gravity, which must fill the heat exchange chamber 510 until the liquid level is higher than the mouth of the outlet pipe 411 to enter the water flow channel 410 and exit the heat exchange chamber 510 from the water flow channel 410. In this manner, the coolant fills the heat exchange chamber 510 to sufficiently contact the wall of the connector 500 for better heat exchange.

In this embodiment, as shown in fig. 4 and 5, a guide plate 511 is disposed in the heat exchange chamber 510, and the guide plate 511 extends along the central axis direction of the main shaft 400. The number of the guide vanes 511 is plural, and the plurality of guide vanes 511 are distributed in an annular array around the central axis of the main shaft 400. Specifically, on the side away from the water flow passage 410, the flow deflector 511 has a gap with the wall of the connecting cylinder 500, so that the cooling liquid can pass through; on the side close to the water flow passage 410, among the plurality of guide vanes 511, a guide vane 511a in a horizontal plane (perpendicular to the axis of the inlet pipe 421) is attached to the cylinder wall of the connecting cylinder 500, i.e., there is no gap therebetween. The design is such that after entering the heat exchange chamber 510, the cooling fluid can only flow to the two ends of the heat exchange chamber 510 along the flow deflectors 511; particularly, after being blocked by the flow guide plate 511a, the cooling liquid can only pass through the flow guide plate 511a from one side with a gap, so that although the water inlet pipe 420 and the water flow channel 410 are both arranged at one side in the heat exchange cavity 510, the cooling liquid can still be guided to the other side of the heat exchange cavity 510, so that the cooling liquid can fully flow through the heat exchange cavity 510, and the cooling is more uniform.

The working principle of the water-cooled permanent magnet drum motor 10 of the present invention is explained below with reference to the above embodiments, please refer to fig. 3, fig. 4 and fig. 5 together:

in operation, as shown in fig. 3, the induction core 310 is energized to generate a magnetic field, and the permanent magnet 210 on the rotor drum 200 rotates under the action of the magnetic field, so as to drive the rotor drum 200 to rotate together. In the working process, the temperature of the induction core 310 of the stator 300 gradually rises, and as the induction core 310 is sleeved on the connecting cylinder 500, the high temperature of the stator 300 is transferred to the cylinder wall of the connecting cylinder 500;

under the action of an external pump, the cooling liquid enters the heat exchange cavity 510 after passing through the water inlet pipe 420 and the inlet pipe 421, and because the guide vanes 511 are arranged in the heat exchange cavity 510, the cooling liquid can only flow to the two ends of the heat exchange cavity 510 along the guide vanes 511 under the guide of the guide vanes 511; especially, the coolant passes through the guide fins 511a from only one side having a gap after being blocked by the guide fins 511a, so that the coolant fills the entire heat exchange chamber 510. Since the low-temperature coolant contacts the wall of the connecting cylinder 500 with a high temperature, the coolant exchanges heat with the connecting cylinder 500, that is, the coolant cools the connecting cylinder 500, thereby indirectly reducing the temperature of the inductive core 310. As new coolant is flooded, the coolant that has completed the heat exchange will carry heat away from the outlet pipe 411 and out of the heat exchange chamber 510 through the water flow channel 410. Thus, the induction core 310 is cooled by water.

Further, because in the cooling process, the coolant liquid needs to be full of whole heat exchange cavity 510, then the load of main shaft 400 will increase, for the load that reduces main shaft 400, increase the flow velocity of coolant liquid, the utility model discloses special design has still been made to connecting cylinder 500.

Specifically, as shown in fig. 6, an isolation inner cylinder 520 is disposed in the connection cylinder 500, and the heat exchange cavity 510 is disposed between the cylinder wall of the connection cylinder 500 and the isolation inner cylinder 520. In this way, the space in the heat exchange chamber 510 can be greatly reduced, so as to reduce the volume of the cooling liquid required during cooling, and further reduce the load of the main shaft 400. Meanwhile, the space in the heat exchange cavity 510 is reduced, and the flow rate of the cooling liquid in the heat exchange cavity 510 is accelerated under the condition that the flow rate of the cooling liquid is not changed, so that the heat exchange is faster realized, and the heat dissipation capacity of the connecting cylinder 500 is improved.

To sum up, the utility model discloses a water-cooled permanent magnet drum motor 10 can make stator 300 in it obtain effectual cooling through water-cooled mode, avoids stator 300 operating temperature too high to improve stator 300 life.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A water-cooled permanent magnet drum motor, comprising: the device comprises a fixed base, a rotor roller, a stator, a main shaft and a connecting cylinder; the rotor roller and the stator are mounted on the fixed base through the main shaft, the rotor roller is rotatably arranged on the main shaft, the rotor roller is of a hollow structure, the stator is accommodated in the rotor roller, the stator is sleeved on the connecting cylinder, and the connecting cylinder is sleeved on the main shaft;

2. The water-cooled permanent magnet drum motor according to claim 1, wherein the water inlet pipe is inserted through the main shaft and is accommodated in the water flow channel; the water inlet pipe is communicated with the heat exchange cavity through an inlet pipe, and the water flow channel is communicated with the heat exchange cavity through an outlet pipe.

3. The water-cooled permanent magnet drum motor according to claim 1, wherein the inner wall of the rotor drum is provided with a permanent magnet, the stator comprises an induction core, the induction core is sleeved on the connecting cylinder, and the induction core is matched with the permanent magnet.

4. The water-cooled permanent magnet drum motor according to claim 3, wherein end caps are provided at both ends of the rotor drum, the main shaft is inserted into the end caps, and a bearing is provided between the main shaft and the end caps.

5. The water-cooled permanent magnet drum motor according to claim 3, wherein the spindle is provided with a wiring channel, and the wiring channel is positioned at one end far away from the water flow channel.

6. The water-cooled permanent magnet drum motor according to claim 2, wherein the axis of the inlet pipe is perpendicular to the central axis of the main shaft, and the axis of the outlet pipe is perpendicular to the central axis of the main shaft; the inlet pipe is below the outlet pipe.

7. The water-cooled permanent magnet drum motor according to claim 6, wherein a flow deflector is arranged in the heat exchange cavity, and the flow deflector extends along the central axis direction of the main shaft; the guide vanes are distributed in an annular array by taking the central axis of the main shaft as a center.

8. The water-cooled permanent magnet drum motor according to claim 6, wherein an isolation inner cylinder is arranged in the connecting cylinder, and the heat exchange cavity is positioned between the wall of the connecting cylinder and the isolation inner cylinder.