Encapsulated water-cooled motor housing, motor and motor drive device

Abstract

The present invention relates to an encapsulated water-cooled motor case, a motor and a motor drive device. The purpose of the present invention is to provide an encapsulated water-cooled motor case, a motor and a motor drive device with a simple structure, low cost, and saving installation space and external auxiliary parts. The technical solution of the present invention is: an encapsulated water-cooled motor case, characterized in that: it has a cylindrical inner core, and an outer shell coaxially sleeved outside the inner core, the front ends of the inner core and the outer shell are commonly connected to the front end plate, the rear ends of the inner core and the outer shell are commonly connected to the rear end plate, and the gap between the outer shell and the inner core is blocked by the front and rear end plates to form a water volume for storing cooling water, and a plurality of heat exchange tubes are evenly arranged in the water volume and around the inner core, and the front and rear ends of the heat exchange tubes pass through the through holes on the front and rear end plates respectively, and the through holes and the heat exchange tubes are sealed with sealing materials or by welding. The present invention is applicable to the field of motors.

Description

Technical Field

[0001] The present invention relates to a packaged water-cooled motor housing, a motor and a motor driving device, which are applicable to the motor field. Background Art

[0002] Due to the development trend of energy saving and small size and high power in the motor industry, water-cooled motor housings have become a rigid demand in many emerging industries. For example, motors for new energy vehicles have transitioned from air cooling to today's water cooling. The purpose of using water cooling for motor cooling is only to dissipate heat during motor operation, to ensure efficient operation of the motor and that the permanent magnets are not demagnetized due to high temperature.

[0003] In the case where the working fluid of the mechanical working body matched with the motor needs to be cooled, the motor is an external component, so the cooling of the two is isolated from each other. In the case where water cooling is also required, two sets of parallel pipes are used, and the water flow is connected in series or in parallel, and connected through an external pipe, which requires reserved connection space and maintenance space. For some industries with compact installation space, this not only needs improvement, but the maintenance burden of the external water pipe cannot be ignored. Summary of the invention

[0004] The technical problem to be solved by the present invention is: in view of the above-mentioned problems, a packaged water-cooled motor housing, a motor and a motor drive device are provided which have a simple structure, low cost, and save installation space and external auxiliary parts.

[0005] The technical solution adopted by the present invention is: an encapsulated water-cooled motor casing, characterized in that: it has a cylindrical inner core, and an outer shell coaxially sleeved outside the inner core, the front ends of the inner core and the outer shell are commonly connected to the front end plate, the rear ends of the inner core and the outer shell are commonly connected to the rear end plate, and the gap between the outer shell and the inner core is blocked by the front and rear end plates to form a water volume cavity for storing cooling water, a plurality of heat exchange tubes are evenly arranged in the water volume cavity and around the inner core, the front and rear ends of the heat exchange tubes respectively pass through the through holes on the front and rear end plates, and the through holes and the heat exchange tubes are sealed with sealing materials or by welding.

[0006] The heat exchange tubes are horizontal cooling tubes, vertical cooling tubes or built-in spiral tubes.

[0007] A plurality of heat dissipation protrusions are formed on the outer wall of the inner core.

[0008] The outer wall of the inner core is connected to the inner wall of the outer shell via a plurality of connecting pieces.

[0009] The water containing cavity is divided into a plurality of chambers by a plurality of connecting pieces arranged along the axis of the inner core, and the chambers are connected by water tank channels.

[0010] The shell is provided with a water inlet and a water outlet which are communicated with the water containing cavity.

[0011] The front end plate and / or the rear end plate are provided with a water inlet hole connected with the water containing cavity.

[0012] The outer shell is provided with an installation opening, which is connected to the inner wall of the inner core through a cable lead-in channel.

[0013] A motor, characterized by having the encapsulated water-cooled motor casing.

[0014] 1. A motor drive device, characterized in that it has the motor described above, and a mechanical working body matched with the motor, wherein the mechanical working body is equipped with a water cooling device, the cooling water channel of the water cooling device is connected to the water volume chamber inside the motor through the water inlet hole on the motor shell of the motor, and the two ends of the heat exchange tube on the motor shell are connected to the hot working fluid communication pipe (port) on the mechanical working body for water cooling and temperature reduction.

[0015] The beneficial effects of the present invention are as follows: the present invention forms a water heat exchanger by means of a water cavity formed by the inner core, the outer shell, etc. in combination with a heat exchange tube arranged in the water cavity, which not only meets the cooling needs of the motor, but also provides water cooling for the working medium, thereby expanding the function of the motor housing, saving installation space and peripheral auxiliary components, greatly improving the cost performance of the product, and conforming to the development trend of today's highly integrated and cost-reducing industrial products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the motor housing in Example 1.

[0017] Figure 2 This is the appearance diagram of the motor housing in Example 1.

[0018] Figure 3 It is a cross-sectional view of the inner core and the outer shell in Example 1.

[0019] Figure 4 Schematic diagram of the structure of the heat exchange tube in Example 1.

[0020] Figure 5 Schematic diagram of the structure of the heat exchange tube in Example 2. DETAILED DESCRIPTION

[0021] Embodiment 1: This embodiment is a motor with an encapsulated water-cooled motor housing, such as Figure 1 , Figure 2 As shown, the motor housing of the motor comprises a cylindrical inner core 1, an outer shell 2 with a square cross section, a front end plate 3, a rear end plate 4 and other parts, and a plurality of heat dissipation protrusions 101 are formed on the outer wall of the inner core 1.

[0022] like Figure 3As shown, the outer shell 2 in the motor housing is coaxially sleeved on the inner core 1, and the outer shell 2 and the inner core 1 are connected via 4 connecting pieces 11 evenly distributed around the inner core 1, and the outer shell 2, the inner core 1 and the connecting pieces 11 are made in one piece. The connecting pieces 11 are arranged along the axis of the inner core 1, dividing the gap between the outer shell 2 and the inner core 1 into 4 areas.

[0023] In this embodiment, the front ends of the inner core 1 and the outer shell 2 are connected to a front end plate 3, and the rear ends of the inner core 1 and the outer shell 2 are connected to a rear end plate 4. The four areas between the outer shell 2 and the inner core 1 are sealed by the front and rear end plates 4 to form a water volume 6 for storing cooling water. The assembly method can be welding sealing or conventional O-ring sealing.

[0024] In this example, a through hole is opened on the front and rear end plates 3 and 4 corresponding to the water chamber 6, and a heat exchange tube 5 is installed in the water chamber 6. The front and rear ends of the heat exchange tube pass through the through holes on the front and rear end plates 3 and 4 respectively, and the through hole and the heat exchange tube 5 are sealed with a sealing material (such as an O-ring) or by welding.

[0025] In this embodiment, the heat exchange tube 5 is a vertical cooling tube, which has a tube body 501 and a plurality of heat dissipation fins 502 formed on the outer surface of the tube body 501 and arranged along the axial direction of the tube body 501, so as to increase the heat exchange area of ​​the heat exchange tube 5 to meet the cooling and heat exchange requirements of the cooled fluid. The tube body is also provided with an insert strip 503 arranged along its axial direction (see FIG. Figure 4 The two ends of the tube body 501 of the heat exchange tube 5 pass through the through holes on the front and rear end plates 3 and 4 respectively, the heat dissipation fins 502 are located in the water volume chamber 6, and the heat exchange tube 5 is plug-in connected to the shell 2 through the insertion strip 503 thereon and the slot 201 on the inner wall of the shell 2.

[0026] In this embodiment, the water cavities 6 are connected through water trough channels, so that the cooling water flows in the water cavities 6 are connected. The water trough channels can be arranged on the front and rear end plates 3 and 4.

[0027] In this example, a water inlet 8 and a water outlet 9 are provided on the outer shell 2, and the water inlet 8 and the water outlet 9 are connected to the water chamber 6 in the outer shell 2. Since the water chambers 6 are connected through the water tank channel, only one water inlet 8 and one water outlet 9 are required. In this example, a mounting port 10 is provided on the outer shell 2 at a position corresponding to the internal connector 11, and the mounting port 10 is connected to the inner wall of the inner core 1 through a cable lead channel provided in the connector 11, so as to facilitate the cable in the motor to be led out of the motor housing.

[0028] In this embodiment, water inlet holes 7 are provided on the front and rear end plates 3 and 4, and the water inlet holes 7 are connected to the water volume chamber 6 in the motor housing. Through the water inlet holes 7, the water cooling device installed on the mechanical working body (such as the pump body of the air compressor) at both ends of the motor can be connected to the water volume chamber 6 of the motor, which greatly simplifies the water cooling system of the mechanical device used for the motor, realizes the integrated water cooling of the motor and the mechanical working body, and can provide multiple built-in water coolers for multi-stage compressors and other similar equipment, and does not occupy the external dimensions, which is suitable for the field of compressors that require small volume, high pressure or large displacement.

[0029] 2. The motor drive device has the motor of this embodiment and a mechanical working body matched with the motor, wherein the mechanical working body is equipped with a water cooling device, the cooling water channel of the water cooling device is connected to the water volume chamber 6 therein through the water inlet hole 7 on the motor shell of the motor, and both ends of the heat exchange tube 5 on the motor shell are connected to the hot working fluid connecting pipe (port) on the mechanical working body for water cooling and cooling.

[0030] Embodiment 2: This embodiment has the same structure as Embodiment 1, except that the heat exchange tube 5 in this embodiment adopts Figure 5 Horizontal cooling tube shown.

[0031] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, additions or substitutions made by ordinary technicians in this technical field within the scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A motor drive device, characterized in that: A motor and a mechanical working body matched with the motor; The motor has an encapsulated water-cooled motor casing, which is characterized by: having a cylindrical inner core (1), and an outer shell (2) coaxially sleeved outside the inner core (1), the front ends of the inner core (1) and the outer shell (2) are commonly connected to a front end plate (3), the rear ends of the inner core (1) and the outer shell (2) are commonly connected to a rear end plate (4), the gap between the outer shell (2) and the inner core (1) is blocked by the front and rear end plates to form a water volume (6) for storing cooling water, a plurality of heat exchange tubes (5) are evenly arranged in the water volume (6) and around the inner core (1), the front and rear ends of the heat exchange tube (5) respectively pass through the through holes on the front and rear end plates, and the through holes and the heat exchange tubes (5) are sealed by a sealing material or by welding; The front end plate (3) and / or the rear end plate (4) are provided with a water inlet hole (7) which is in communication with the water storage chamber (6); The mechanical working body is equipped with a water cooling device, the cooling water channel of the water cooling device is connected to the water volume chamber (6) therein through the water inlet hole (7) on the motor housing of the motor, and both ends of the heat exchange tube (5) on the motor housing are connected to the hot working fluid communication tube on the mechanical working body for water cooling; The housing (2) is provided with a water inlet (8) and a water outlet (9) which are in communication with the water chamber (6); The outer shell (2) is provided with a mounting opening (10), and the mounting opening (10) is connected to the inner wall of the inner core (1) via a cable lead channel.

2. The motor drive device according to claim 1, characterized in that: The heat exchange tube (5) is a horizontal cooling tube, a vertical cooling tube or a built-in spiral tube.

3. The motor drive device according to claim 1, characterized in that: A plurality of heat dissipation protrusions (101) are formed on the outer wall of the inner core (1).

4. The motor drive device according to claim 1, characterized in that: The outer wall of the inner core (1) is connected to the inner wall of the outer shell (2) via a plurality of connecting pieces (11).

5. The motor drive device according to claim 4, characterized in that: The water storage cavity (6) is divided into a plurality of chambers via a plurality of connecting pieces (11) arranged along the axis of the inner core (1), and the chambers are connected via water tank channels.

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