TWI484735B - Cooling structure for a direct-drive motor - Google Patents

Description

Direct drive motor cooling structure

This invention relates to a motor cooling structure, and more particularly to a direct drive motor cooling structure that can exchange heat directly from a heat source within the motor.

In the direct drive motor structure, there are usually a plurality of fixed fixed objects such as a stator and a bearing. With a relatively high-speed rotating rotating object such as a rotor and a main shaft, kinetic energy is generated by the motion of the two. However, the fixed object and the rotating object must generate a heat source due to the movement.

There are many reasons for the temperature rise of the motor, such as the loss of the motor itself, such as iron loss, copper loss, mechanical damage, eddy current loss, and the like. It is also caused by improper use or operation, such as overload use, timeout operation, frequent start and stop, high voltage, ambient temperature, improper capacitance matching, and so on. The most common current is a heat source due to the impedance flowing in the coil, and the components bypassing the coil, such as the stator, affect other components due to the heat conduction effect. For example, the main shaft of high-speed motion increases the heat source of rolling friction of the bearing due to the heat source. Or the magnetic pole may cause thermal agitation due to the heat source, causing magnetic loss.

As can be seen from the above, in addition to the operation of the motor-related components, the heat source is generated from the inside of the motor itself and is more likely to accumulate inside the motor casing. If such a vicious circle cannot be effectively excluded, In addition to energy waste due to heat loss, the motor is more likely to burn the motor components due to high temperatures.

To this end, the industry has also proposed a number of solutions, such as the Chinese patent application No. 96210913, No. 96206928, No. 95208570, No. 92132826, etc., many of the conventional heat dissipation structures shown in the prior case. In the above conventional case, the motor convection is accelerated by rotating a blade of the motor, thereby causing heat dissipation of the motor, but the disadvantages are:

1. The fan blade will consume motor kinetic energy and reduce the substantial power output. In addition, the noise caused by the rotation of the fan blade is proportional to the motor speed.

2. By the flow of air as cooling, the airflow path tends to pass through the inside of the motor. When the motor is used for a period of time, the entire flow path easily accumulates dust and affects the operation of the motor. The air flow is reduced, the heat dissipation effect is reduced, and such a vicious cycle causes the dust to be dismantled and cleaned at intervals, otherwise the motor has a prone life or a heat buildup, which causes maintenance problems.

3. The heat dissipation by airflow must be in a ventilated environment, and the poorly ventilated environment is bound to be difficult to apply. Furthermore, it is necessary to pay attention to the air quality, because the air quality determines the number of teardown maintenance.

In view of the lack of heat dissipation in the airflow, there are also proposals in the industry to use coolant as a heat sink, such as the China Patent Announcement. No. I367622, which is a motor having a heat exchange flow path. The summary field "has a motor having a heat exchange flow path, comprising a drive unit, a housing unit, and a heat exchange flow path. The drive unit includes a stator and a rotor. The housing unit includes a heat dissipation wall. a first cover and a second cover, the heat dissipation wall has a first end and a second end oppositely disposed, the first and second cover are respectively adhered to the first and second covers The end portion and the heat dissipation wall co-cover the driving unit. The heat exchange flow path includes an input port, an output port, a plurality of spaced axial paths, and a plurality of spaced lateral paths, wherein the axial paths are The transverse path is disposed between the first end and the first cover, and the second end and the second cover are alternately connected to each other. Axial path". It can be seen from the disclosure that the conventional heat exchange flow path provides a solution to the lack of heat generated by airflow. However, in the case of the conventional heat exchange flow path motor, the heat exchange flow path is disposed between the inner and outer casings, which not only causes an increase in volume, but also causes the heat source of the casing to be caused by multiple layers of heat conduction, and the heat exchange thereof is relatively After that, multiple layers of feedback are required to reach the core of the heat source, and the heat exchange efficiency is obviously poor and slow.

In view of the fact that various heat dissipation schemes are still not perfect, and in order to ensure the stability of the motor operation and the maintenance accuracy, the heat source generated by the motor actuation is necessary for improvement.

In view of the above problems and deficiencies of the prior art, one of the objects of the present invention is to provide a direct drive motor cooling structure. In order to improve the heat generated by the direct drive motor.

In accordance with the purpose of the present invention, a direct drive motor cooling structure is provided that includes a stator, a front adapter plate, a rear adapter plate, a plurality of round bars, and at least one cooling tube. Wherein, the stator system is composed of a plurality of silicon steel sheets, and the stator is transversely provided with a plurality of cooling tube through holes and round rod through holes. The plurality of round rods are arranged to be arranged in the corresponding round rod through holes. Then, the front and rear adapter plates are disposed on the front and rear sides of the stator, and the locking elements are respectively inserted through the front and rear through holes of the front and rear adapter plates, and locked by the round bar locking holes at both ends of the round bar. The above components. After the cooling pipe is sequentially passed through the cooling pipe through hole, the end of the cooling pipe is disposed in the limiting groove of the front adapter plate. The coolant is supplied to the cooling pipe and exchanges heat with the heat source inside the motor, thereby maintaining the operating temperature of the direct drive motor.

According to the above description, the direct drive motor cooling structure of the present invention rapidly and widely transmits the coolant to the stator inside the direct drive motor through the cooling pipe penetrating and surrounding each of the silicon steel sheets, so that the coolant is bypassed. On the way, the heat exchange with the motor core heat source is carried out to maintain the working temperature of the direct drive motor, and to avoid the influence of high temperature on the direct drive motor.

The direct drive motor cooling structure of the present invention is further explained below. Example. For the sake of understanding of the embodiments of the present invention, the same components are denoted by the same reference numerals.

Please refer to FIG. 1 to FIG. 1 , FIG. 1 is a schematic diagram of an embodiment of a direct drive motor cooling structure according to the present invention, and FIG. 2 is a schematic exploded view of the direct drive motor cooling structure of the present invention, and FIG. 3 is a view of the present invention. Front view of the direct drive motor cooling structure, Fig. 4 is a direct drive type motor cooling structure of the present invention. Fig. 3 is a cross-sectional view and Fig. 5 is a direct drive motor cooling structure of the present invention. II-II section line drawing. In the figure, the direct drive motor cooling structure comprises a stator 1, a front adapter plate 2, a rear adapter plate 3, a plurality of round bars 4 and at least one cooling pipe 5. The stator 1 is composed of a plurality of silicon steel sheets 11 , and the stator 1 has a plurality of cooling tube through holes 12 and round rod through holes 13 extending transversely. The plurality of round bars 4 are arranged to be disposed in the corresponding round rod insertion holes 13. Then, the front and rear adapter plates 2, 3 are disposed on the front and rear sides of the stator 1, and the front and rear portions of the first and second receptacles 21, 31 of the front and rear adapter plates 2, 3 are respectively separated by the locking components. The holes 211 and 311 are inserted into the round bar locking holes 41 at both ends of the round bar 4 to limit the plurality of steel sheets 11 . After the cooling pipe 5 is sequentially inserted through the cooling pipe through hole 12 and a part of the front and rear through holes 211 and 311, the cooling pipe 5 end segments 51, 51' are disposed on the front adapter plate 2 The limiting groove 22 is connected with the connecting piece 6 to connect the end sections 51, 51' of the cooling pipe 5 to provide a cooling device coolant supply pipe connection (not shown).

If it is a structure, the coolant enters from the cooling pipe 5 to the non-segment 51, and the stator 1 of the stator 1 is widely wound by the cooling pipe 5, The coolant is heat exchanged with the core heat source inside the motor on the way of bypassing, and the heat exchanged coolant is outputted from the other non-segment 51' of the cooling pipe 5, and the cooling device for the back end is connected to the coolant. (not shown in the figure). Thereby, the heat source of the inner core of the motor is quickly and directly taken away from the inside of the motor to maintain the operating temperature of the direct drive motor.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1‧‧‧stator

11‧‧‧矽Steel sheet

12‧‧‧Cooling tube through hole

13‧‧‧round rod hole

2‧‧‧ Front adapter plate

21‧‧‧first slot

211‧‧‧ front through hole

3‧‧‧ rear adapter plate

31‧‧‧Second cavity

311‧‧‧ rear through hole

4‧‧‧ round bar

5‧‧‧ Cooling tube

51, 51’‧‧‧ end

6‧‧‧ Sockets

Fig. 1 is a schematic view showing an embodiment of a direct drive motor cooling structure of the present invention.

Fig. 2 is a schematic exploded view of the direct drive motor cooling structure of the present invention.

Figure 3 is a front view of the direct drive motor cooling structure of the present invention.

Figure 4 is a cross-sectional view of the direct drive motor cooling structure of the present invention.

Fig. 5 is a cross-sectional view of the direct drive motor cooling structure of the present invention, Fig. 3, II-II

1‧‧‧stator

2‧‧‧ Front adapter plate

21‧‧‧first slot

3‧‧‧ rear adapter plate

5‧‧‧ Cooling tube

6‧‧‧ Sockets

Claims (5)

A direct drive motor cooling structure, comprising: a stator, is composed of a plurality of silicon steel sheets, and the stator is axially inserted with a plurality of cooling tube through holes and a plurality of round rod through holes; a front adapter plate The front adapter plate is disposed at a front side of the stator, and the front adapter plate is provided with a plurality of first pockets, and each of the first pockets is provided with a plurality of front through holes, and each of the front through holes and each of the round holes are provided Corresponding to each of the cooling tube insertion holes; a rear adapter plate is disposed on a rear side of the stator, the rear adapter plate is provided with a plurality of second pockets, and each of the second pockets is provided with a plurality of a rear through hole, and each of the rear through holes corresponds to each of the round rod through holes and each of the cooling tube through holes; and the plurality of round rods are respectively disposed on the corresponding round rod through holes, each of which is disposed Each of the two ends of the round bar is respectively provided with a round bar locking hole, and the round bar locking hole corresponds to one of each of the front through holes and one of the rear through holes, and at least one locking component is matched with each other. One of the front through holes and one of the corresponding rear through holes are inserted into the lock; and at least one cooling tube is sequentially threaded by the flexibility The cooling tube and each of the through hole and each through hole after the front. The direct drive motor cooling structure according to claim 1, wherein one of the first tanks is provided with a plurality of limit slots on one side thereof, and one end section of the cooling pipe is provided at each end This limit One of the bit slots. The direct drive motor cooling structure of claim 2, wherein the end portion of the cooling pipe further provides a plurality of socket connections. The direct drive motor cooling structure according to claim 1, wherein a metal filler is further filled between one of the outer sides of the cooling pipe and each of the cooling pipe through holes. The direct drive motor cooling structure of claim 4, wherein the metal filler is a tin metal.