Liquid-cooled electronic water pump

Abstract

The utility model relates to a liquid-cooled electronic water pump which comprises a pump cover, a motor shell and a bottom shell, the pump cover comprises a water inlet and a water outlet, the motor shell comprises an inner shell and an outer shell, a motor cavity is formed in the area defined by the inner shell, a motor and a rotating shaft are distributed in the motor cavity, and a through hole is formed in the middle of the rotating shaft; the inner shell is sleeved with the outer shell, and a cooling cavity is formed in the area defined by the outer wall of the inner shell and the inner wall of the outer shell. A channel communicated with the cooling cavity is arranged in the water outlet, water retaining fences which are matched with the inner wall of the outer shell to form a water channel are arranged in the circumferential direction of the inner shell in the axis direction, and a water passing hole communicated with the through hole to form cooling water circulation is formed in the center of the bottom of the inner shell. The cooling water inlet is arranged at the water outlet of the water pump, vortex inside a water pumping chamber of the water pump is not affected, the performance stability is high, water does not need to be drained outwards, an external pipeline is not needed, an additional device is not needed, and the overall sealing performance of the water pump can be ensured; cooling water forms circulation to facilitate sand cleaning and cleanliness control, and the mold is simple. The method can be selected as an additional additive.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump design development field, specifically speaking is a kind of liquid-cooled electronic water pump. BACKGROUND

[0002] High-power electronic water pump is mainly applied to new energy vehicles, data center and other need a lot of cooling water circulation cooling scene, electronic water pump in the above-mentioned scene works for a long time, water pump motor high-speed operation can be intense heat, serious time even can produce motor high temperature and cause stop automatic protection, while circuit board is also prone to damage under high temperature environment, to solve the heat dissipation problem of water pump motor, design and development a kind of liquid-cooled electronic water pump.

[0003] CN202420710017.5 a kind of liquid cooling heat dissipation submersible pump discloses including volute, impeller, motor casing, motor and shell;Volute is provided with water inlet, water outlet and water inlet hole, inside is provided with water chamber, water inlet and water outlet are connected with water chamber and outside respectively;Impeller is arranged in the inside of volute, and is opposite water inlet;Motor casing connects volute, and inside is provided with closed motor cavity;Motor is installed in motor cavity, and the rotating shaft of motor is inserted into volute inside and is transmission connection impeller;Shell is sleeved on the outside of motor casing, and the inside surface and the outside surface of volute, motor casing are enclosed to form cooling cavity, first water hole is opened on shell;Cooling cavity is connected with water chamber by water inlet hole, and is connected with outside by first water hole.This submersible pump although adopts the form of two layers of motor shell to cool, but it needs external pipeline to carry out and cooling water circulation, and its water inlet is arranged in water chamber, can influence the vortex in water chamber, causes unstable working pressure. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a kind of liquid-cooled electronic water pump.The technical problems to be solved by the utility model are realized using the following technical solutions:

[0005] A kind of liquid-cooled electronic water pump, including pump cover, motor casing and bottom shell, the pump cover includes water inlet and water outlet, the motor casing includes inner shell and shell, the region formed by the inner shell is motor cavity, the motor cavity is distributed with motor and rotating shaft, the rotating shaft middle part is equipped with through-hole;

[0006] The shell is sleeved on the outer wall of inner shell, and the region formed by the inner wall of inner shell and the inner wall of shell is cooling cavity body;

[0007] The water outlet is equipped with passageway communicated with cooling cavity body, the inner shell is equipped with water baffle around the circumference along the axis direction respectively and with the inner wall of shell and forms water channel, the inner shell bottom center is equipped with water pass hole communicated with through-hole to form cooling water circulation;

[0008] The cooling water enters the cooling cavity through the passage at the water outlet, and then enters the motor cavity through the water passing hole, and moves to the water inlet through the through hole on the rotating shaft to form a circulation.

[0009] The water blocking fence comprises a first water blocking ring arranged on the outer wall of the inner shell and distributed along the axial direction of the inner shell, and each first water blocking ring is open at both ends to form a first notch, and adjacent two first water blocking rings are distributed in a staggered manner.

[0010] The utility model discloses the beneficial effect is:

[0011] The utility model discloses the inlet of cooling water is arranged at the water outlet of water pump, does not influence the eddy current in the water pump pressure water chamber, and the performance stability is high, also need not drain to the outside, no external pipeline, need not additional device, can ensure that the overall sealing property of water pump, and the circulation of cooling water is convenient for sand control and cleanliness, and the mould is simple. DRAWINGS

[0012] The utility model will be further described below in combination with the drawings and examples.

[0013] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0014] Figure 2 It is the section structure schematic diagram of the utility model;

[0015] Figure 3 It is the three-dimensional structure schematic diagram of the inner shell of the utility model;

[0016] Figure 4 It is the inner shell bottom view of the utility model.

[0017] As shown in the figure: 1, pump cover;2, motor shell;3, bottom shell;4, water inlet;5, water outlet;6, motor cavity;7, motor;8, rotating shaft;9, through hole;10, impeller assembly;11, flat key;12, cover nut;13, water channel;21, inner shell;22, outer shell;23, cooling cavity;24, passage;25, water blocking fence;26, water passing hole;27, lead-out part;251, first water blocking ring;252, first notch;253, extension;254, second notch;255, second water blocking ring. PREFERRED EMBODIMENT

[0018] In order to make the technical personnel of the prior art better understand the technical scheme of the utility model, the utility model will be more clearly and completely described below in combination with the drawings in the examples, of course the described example is only a part of the utility model but not all, based on this example, the technical personnel in the art obtains other examples without paying the creative labor intensity, all are within the protection scope of the utility model.

[0019] As Figures 1 to 4 shown, a liquid-cooled electronic water pump, comprising a pump cover 1, a motor housing 2 and a bottom shell 3, the pump cover 1 comprising a water inlet 4 and a water outlet 5, the motor housing 2 comprising an inner shell 21 and an outer shell 22, the area surrounded by the inner shell 21 forms a motor cavity 6, the motor cavity 6 is distributed with a motor 7 and a rotating shaft 8, the rotating shaft 8 is provided with a through hole 9 in the middle;

[0020] The outer shell 22 is sleeved on the outer shell 21, and the area surrounded by the outer wall of the inner shell 21 and the inner wall of the outer shell 22 forms a cooling cavity 23;

[0021] The water outlet 5 is provided with a channel 24 communicating with the cooling cavity 23, the inner shell 21 is provided with a water retaining fence 25 in the circumferential direction along the axis direction, which respectively forms a water channel with the inner wall of the outer shell 22, and the bottom center of the inner shell 21 is provided with a water passing hole 26 communicating with the through hole 9 to form a cooling water circulation; the inner shell 21 is also provided with a lead-out part 27 for leading out the pin;

[0022] The cooling water enters the cooling cavity 23 through the channel 24 at the water outlet 5, then enters the motor cavity 6 through the water passing hole 26, and moves to the water inlet 4 through the through hole 9 on the rotating shaft 8 to form a circulation.

[0023] The water retaining fence 25 comprises a first water retaining ring 251 distributed along the axis direction of the inner shell 21 arranged on the outer wall of the inner shell 21, each first water retaining ring 251 is provided with a first notch 252 at both ends in the form of opening, and the adjacent two first water retaining rings 251 are distributed in staggered manner; as Figures 3 to 4 shown, the adjacent two first water retaining rings 251 cooperate with the inner wall of the outer shell 22 to form a water flow channel, and the first notches 252 of the adjacent two first water retaining rings 251 are distributed in opposite direction, so that the water flow fills a single water flow channel and then enters the next water flow channel, ensuring full coverage of the inner shell 21 and achieving effective heat dissipation of the motor 7.

[0024] The outer circle of the bottom of the inner shell 21 is provided with an extension part 253, and the extension part 253 is provided with a second notch 254 distributed in opposite direction, and the water flow enters the bottom of the inner shell 21 through the second notch 254 to realize heat dissipation of the bottom of the motor 7.

[0025] The bottom of the inner shell 21 is provided with a second water retaining ring 255, and the second water retaining ring 255 is at least two segments and is distributed in circumferential direction around the axis of the inner shell 21; as Figures 3 to 4 shown, the second water retaining ring 255 is provided with two segments which are not connected with each other, so that the water flow enters the water passing hole 26 through the unconnected part of the second water retaining ring 255 to form a cooling water circulation.

[0026] The cooling water is pumped out by the water pump, and the liquid enters the water channel 13 through the outlet 5, the channel 24, the cooling cavity 23, the water flow channel formed by the water baffle 25, and the water hole 26, and finally enters the motor cavity 6. The water flows through the through hole 9 of the rotating shaft 8 to the water inlet 4. The inlet of the cooling water is arranged at the outlet 5 of the water pump, which does not affect the vortex inside the water pump pressure chamber, has high performance stability, does not need to discharge water externally, has no external pipeline, does not need additional devices, and can ensure the overall sealing of the water pump. The cooling water forms a circulation to facilitate sand removal and cleanliness control, and the mold is simple. As an additional optional part.

[0027] The water channel 13 is arranged in the shell 22 and is communicated with the channel 24 and the cooling cavity 23.

[0028] The rotating shaft 8 is connected with the impeller assembly 10, and the rotating shaft 8 is provided with the flat key 11 for linkage of the impeller assembly 10 and the rotating shaft 8.

[0029] The rotating shaft 8 is provided with the cover nut 12 for fixing the position of the impeller assembly 10, and the rotating shaft 8 is further connected with the bearing chamber. The bearing chamber comprises a mounting frame, and the mounting frame is distributed with sliding bearings along the axial direction of the rotating shaft 8. The sliding bearings are provided with thrust bearings at both ends, and the sliding bearings are provided with wear-resistant sleeves between the sliding bearings and the rotating shaft 8.

[0030] The basic principle, main features and advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements fall within the scope of the utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid-cooled electronic water pump characterized by: It includes pump cover (1), motor housing (2) and bottom shell (3), the pump cover (1) includes water inlet (4) and water outlet (5), the motor housing (2) includes inner shell (21) and outer shell (22), the area surrounded by the inner shell (21) forms motor cavity (6), the motor cavity (6) is distributed with motor (7) and rotating shaft (8), the rotating shaft (8) middle part is equipped with through hole (9); The outer shell (22) is sleeved on the outer wall of the inner shell (21), and the area surrounded by the inner wall of the outer shell (22) forms a cooling cavity (23); The water outlet (5) is provided with a channel (24) communicated with the cooling cavity (23), and the inner shell (21) is provided with a water retaining fence (25) along the axis direction and matched with the inner wall of the outer shell (22) to form a water channel, and the bottom center of the inner shell (21) is provided with a water passing hole (26) communicated with the through hole (9) to form a cooling water circulation; The cooling water enters the cooling cavity (23) through the channel (24) at the water outlet (5), and then enters the motor cavity (6) through the water passing hole (26), and moves to the water inlet (4) through the through hole (9) on the rotating shaft (8) to form a circulation.

2. The liquid-cooled electronic water pump of claim 1, wherein: The water retaining fence (25) includes a first water retaining ring (251) arranged on the outer wall of the inner shell (21) and distributed along the axis direction of the inner shell (21), and each first water retaining ring (251) is provided with a first notch (252) at both ends.

3. The liquid-cooled electronic water pump of claim 1, wherein: The two adjacent first water retaining rings (251) are distributed in a staggered manner.

4. The liquid-cooled electronic water pump of claim 2, wherein: The outer circle of the bottom of the inner shell (21) is provided with an extension part (253), and the extension part (253) is provided with a second notch (254) distributed in a opposite manner.

5. A liquid-cooled electronic water pump according to claim 4, characterized in that: The bottom of the inner shell (21) is provided with a second water retaining ring (255), and the second water retaining ring (255) is at least two sections and is distributed in a circumferential direction around the axis of the inner shell (21).

6. The liquid-cooled electronic water pump of claim 1, wherein: The inner shell (21) is provided with a water channel (13) communicated with the channel (24) and the cooling cavity (23) respectively.

7. The liquid-cooled electronic water pump of claim 1, wherein: The rotating shaft (8) is connected with an impeller assembly (10), and the rotating shaft (8) is provided with a flat key (11) for linkage between the impeller assembly (10) and the rotating shaft (8).

8. The liquid-cooled electronic water pump of claim 6, wherein: The top end of the rotating shaft (8) is provided with a cover nut (12) for fixing the position of the impeller assembly (10).

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