Electric pump

Patent metadata

Field	Value
Publication number	US-10326328-B2
Application number	US-201615296137-A
Country	US
Kind code	B2
Filing date	Oct 18, 2016
Priority date	Oct 30, 2015
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

An electric pump is provided according to the application, which includes a housing, a shaft, an impeller, a rotor assembly, a stator assembly and an inner chamber. The shaft, the impeller and a rotor are arranged in the inner chamber. The housing includes a first housing, a partition and a second housing, and the partition divides the inner chamber into a wet chamber and at least one dry chamber. The partition includes a first side wall, a first bottom, a second side wall and a second bottom. The second side wall isolates the rotor assembly and the stator assembly. An outer peripheral surface of the second side wall is provided with reinforcing ribs, and the reinforcing ribs improve the strength of the second side wall.

First claim

The invention claimed is:

1. An electric pump, comprising a housing, a shaft, a rotor assembly, a stator assembly, and an inner chamber, the rotor assembly is arranged in the inner chamber, the rotor assembly is rotatable about a central axis of the shaft, and the rotor assembly comprises a permanent magnet, and the housing comprises a partition, the partition divides the inner chamber into a wet chamber and at least one dry chamber, the rotor assembly is arranged in the wet chamber, and the stator assembly is arranged in the dry chamber, the partition is formed by injection molding by taking the shaft as an insert, the partition is provided with an inner cavity, the partition comprises a first side wall, a first bottom, a second side wall and a second bottom, the first bottom and the second bottom are distributed in a substantially stepped shape, the second bottom is fixed to the shaft by injection molding, the first side wall surrounds the first bottom, the second side wall isolates the permanent magnet from the stator assembly, the partition comprises first reinforcing ribs, each of the first reinforcing ribs protrudes towards an external of the second side wall, the first reinforcing rib extends in a height direction of the second side wall, the height direction is a direction from the second bottom to the first bottom, the first reinforcing ribs are distributed at intervals along an outer peripheral surface of the second side wall,
wherein the partition comprises second reinforcing ribs, each of the second reinforcing ribs is formed on an outer surface of the second bottom, the second reinforcing ribs are radially distributed on the second bottom, and the distribution density of the second reinforcing ribs gradually decreases from a relative central area of the second bottom to an outer edge of the second bottom,
wherein the partition comprises third reinforcing ribs, each of the third reinforcing ribs protrudes towards the external of the partition from the first bottom, and the third reinforcing ribs are radially distributed on the first bottom from a relative central area of the first bottom to an outer edge of the first bottom.

2. The electric pump according to claim 1 , wherein the stator assembly comprises a stator core, the stator core comprises stator teeth, and a tooth space is formed between adjacent stator teeth, the number of the first reinforcing ribs is the same as the number of the tooth space, the thickness of the first reinforcing rib is slightly less than the width of the tooth space, and the first reinforcing rib is at least partially arranged in a corresponding tooth space.

3. The electric pump according to claim 1 , wherein the stator assembly comprises a stator core, the stator core comprises stator teeth, and a tooth space is formed between adjacent stator teeth, and an inner peripheral surface of each of the stator teeth comprises a groove, the number of the first reinforcing ribs is the same as the total number of tooth space and the groove, the first reinforcing ribs are corresponding to the tooth spaces and the grooves.

4. The electric pump according to claim 1 , wherein the number of the second reinforcing ribs is the same as the number of the first reinforcing ribs, the partition comprises a transition portion, and an end of the first reinforcing rib is connected to an end of the second reinforcing rib by the transition portion.

5. The electric pump according to claim 1 , wherein the number of the third reinforcing ribs is the same as the number of the first reinforcing ribs, the partition comprises a transition portion, and an end of the first reinforcing rib is connected to an end of the third reinforcing rib by the transition portion.

6. The electric pump according to claim 1 , wherein the partition comprises fourth reinforcing ribs, and each of the fourth reinforcing ribs protrudes towards the external of the partition from the first side wall, the fourth reinforcing ribs are distributed at intervals along a circumference of the first side wall, and the fourth reinforcing rib extend in a height direction of the first side wall.

7. The electric pump according to claim 6 , wherein the number of the fourth reinforcing ribs is the same as the number of the third reinforcing ribs, the partition comprises a transition portion, and an end of the fourth reinforcing rib is connected to an end of the third reinforcing rib by the transition portion.

8. The electric pump according to claim 7 , wherein the height of the second reinforcing rib is less than or equal to the height of the first reinforcing rib, the height of the first reinforcing rib is less than or equal to the height of the third reinforcing rib, the height of the third reinforcing rib is less than or equal to the height of the fourth reinforcing rib, the heights are perpendicular distances from free ends of the reinforcing ribs to an outer surface of the partition.

Assignees

• Zhejiang Sanhua Automotive Components Co Ltd

Inventors

• Bao Junfeng
• Ning Qiang
• Yin Bingjiu
• Huang Zhiping

Classifications

• H02K1/2706

  Inner rotors · CPC title

• H02K5/128

  using air-gap sleeves or air-gap discs · CPC title

• H02K3/18

  Windings for salient poles · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title

• F04D29/22

  specially for centrifugal pumps · CPC title