JPH10271738A - Motor for pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor for a pump with good efficiency, by reducing thermal resistance by radiating heart effectively from a coil, and securing a channel well, through which fluid is carried, without decreasing efficiency in motor. SOLUTION: A motor includes a main body 61 with a channel 64, through which fluid (L) is carried, a stator 71 formed in a body with the main body 61 and provided around the channel 64, a rotor 73 in the channel 64, and a shaft 72 joined with the rotor 73 for driving the fluid pump. The stator 71 has a coil part 71b, while the main body 61 has a cooling channel 66, through which fluid (L) is fed near the coil part 71b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump motor for driving a fluid pump for sending out a liquid such as gasoline, and more particularly to a motor capable of improving the motor efficiency and the pump efficiency.

[0002]

2. Description of the Related Art FIGS. 10A and 10B are views showing an example of a conventional pump motor 10 and a pump 40. FIG. 10A shows the position of line YY in FIG. FIG. 4B is a cross-sectional view taken along a direction indicated by an arrow, and FIG.
It is sectional drawing cut | disconnected at the position of the line and seen in the arrow direction. FIG. 11 is a sectional view showing a main part of the pump motor 10.

[0003] The pump motor 10 includes a housing 2 made of a resin material.
0 and an electric motor unit 30. The housing 20 includes a housing main body 21 formed in a cylindrical shape, and FIG.
10A includes a bearing support portion 22 provided at a left portion in the center to support a bearing 34 described later, and a lid 23 covering an opening at a right portion in the middle of FIG. In FIG. 11, reference numeral 24 denotes a flow path through which the liquid L flows, and reference numeral 25 denotes a connection pipe connected to a tank (not shown).

[0004] The motor section 30 is formed integrally with the housing body 21 and is provided with a stator 3 surrounding the flow path 24.
1, a shaft 32 disposed in the flow path 24, a rotor 33 attached to the shaft 32, and a shaft 3
2 is provided.

The stator 31 includes a core 31a, a coil 31b attached to the core 31a, and a resin mold 31c for sealing the coil 31b. In the pump motor 10 configured as described above, the electric motor unit 30 is driven by electric power supplied from the outside,
The rotor 33 rotates. Accordingly, the shaft 32 rotates, and the pump device 40 is driven. On the other hand, the liquid L introduced into the housing body 21 from the connection pipe 25 flows through the flow path 24 and is sent to the pump device.

[0006]

The above-described conventional pump motor 10 has the following problems. That is, as shown in FIG. 11, since the coil portion 31b is sealed by the resin mold 31c, heat is hardly transmitted to the flow path 24 and the radiation efficiency is low. For this reason, the thermal resistance of the motor increases, and the motor efficiency decreases. In addition, it was necessary to increase the size in order to increase the radiation efficiency.

On the other hand, the liquid L is supplied to the stator 31 and the rotor 3
Therefore, when the gap G is narrowed to reduce the magnetic resistance and increase the efficiency of the motor, the liquid L becomes difficult to flow, and the pump efficiency is reduced. Conversely, if the gap G is increased to increase the pump efficiency, the magnetic resistance increases and the motor efficiency decreases.

For this reason, even if a groove or a hole is provided in the rotor 33 in order to enlarge the flow path without narrowing the gap G, turbulence is generated by the groove or the hole and the agitation resistance increases, so that the load on the motor increases. However, there is a problem that the efficiency is reduced by the increase in the number.

Accordingly, the present invention reduces the thermal resistance of the motor by efficiently dissipating the heat generated by the coil, and also increases the pump efficiency by ensuring a sufficient fluid flow path without lowering the motor efficiency. It is an object to provide a pump motor that can be increased.

[0010]

Means for Solving the Problems In order to solve the above problems and achieve the object, an invention according to claim 1 is a pump motor for driving a fluid pump for sending out a fluid, wherein the fluid flows through the motor. A housing in which a flowing channel is formed,
A stator provided integrally with the housing and disposed at a position surrounding the flow path, a rotor disposed in the flow path, and a shaft connected to the rotor and driving the fluid pump. And the stator has a coil portion, and the casing is provided with a cooling channel for introducing the fluid near the coil portion.

According to a second aspect of the present invention, there is provided a pump motor for driving a fluid pump for sending out a fluid, wherein a housing having a flow path through which the fluid flows is formed, and the casing is disposed in the flow path. The bearing support portion, a stator provided integrally with the bearing support portion, a rotor disposed at a position surrounding the bearing support portion in the flow path, and connected to the rotor and A shaft that is supported by a bearing support, and that drives the fluid pump;
A cooling channel for introducing the fluid is provided near the coil portion in the bearing support portion.

As a result of taking the above measures, the following operation occurs. That is, according to the first aspect of the present invention, the power supply device is provided integrally with the housing in which the flow path through which the fluid flows is formed,
The stator arranged at a position surrounding the flow path has a coil part, and the casing has a cooling flow path near the coil part, so that heat generated in the coil part is converted into a fluid. Easy to dissipate. Therefore, the thermal resistance can be reduced.

On the other hand, since the flow path can be sufficiently secured without widening the gap between the stator and the rotor, the pump efficiency can be increased without lowering the motor efficiency.

According to the second aspect of the present invention, the stator provided integrally with the bearing support disposed in the flow path has a coil portion, and the bearing support has a coil near the coil portion. Is provided with a cooling channel, so that heat generated in the coil portion can be easily radiated to the fluid. Therefore, the thermal resistance can be reduced.

On the other hand, since the flow path can be sufficiently secured without widening the gap between the stator and the rotor, the pump efficiency can be increased without lowering the motor efficiency.

[0016]

1A and 1B show a pump motor 50 according to an embodiment of the present invention.
FIG. 3 is a view showing a main part, and FIG. 3 is a view showing a mold 80 used for manufacturing the pump motor 50. In FIG. 1, reference numeral 40 denotes a pump.

The pump motor 50 is provided with a housing 6 made of a resin material.
0 and a motor unit 70. The housing 60 includes a housing main body 61 formed in a cylindrical shape, a bearing support portion 62 provided at a left portion of the housing main body 61 in FIG. 1 to support a bearing 74 described later, and an opening at a right portion in FIG. And a lid 63 for covering the portion. In FIG. 1, reference numeral 64 denotes a flow path through which the liquid L flows, and reference numeral 65 denotes a connection pipe connected to a tank (not shown).

The motor unit 70 includes a stator (stator) 71 integrally molded with the housing body 61 as described later and disposed so as to surround the flow path 64, and a shaft 72 disposed in the flow path 64. And a rotor (rotor) 73 attached to the shaft 72, and a pair of bearings 74, 75 for supporting the shaft 72.

The stator 71 includes a core 71a having a laminated structure, a coil 71b attached to the core 71a, and a resin mold 71c for sealing the coil 71b.

On the other hand, as shown in FIG. 2, the housing body 61 has a flow path 64 extending to the vicinity of the coil portion 71b of the stator 71.
A cooling passage 66 in the form of a groove is formed which communicates with the cooling passage. Next, a manufacturing process of the above-described housing body 61 will be described.
As shown in FIG. 3, the stator 71 is arranged in the mold 80. In FIG. 3, reference numeral 81 denotes an upper die, and 82 denotes a lower die. A cavity 83 corresponding to the housing body 61 is formed. Then, when the resin material is injected, the housing body 61 is formed.

The pump motor 50 constructed as described above
Then, when the electric motor unit 70 is driven, the rotor 73 rotates. Accordingly, the shaft 72 rotates, and the pump device is driven. Along with this, the connection pipe 65 moves the housing body 6
The liquid L introduced into the inside 1 flows through the flow path 64 and is sent to the pump device.

A part of the liquid L is introduced into the cooling passage 66. The liquid L introduced into the cooling channel 66 cools the heated coil portion 71b. That is, the heat H is easily transmitted to the cooling passage 66. Therefore, the thermal resistance of the electric motor unit 70 can be reduced, and the motor efficiency can be improved.

On the other hand, since the liquid L flows not only through the flow path 64 but also through the cooling flow path 66, the flow rate of the liquid L can be increased without expanding the flow path 64, and the pump efficiency can be increased. Can be improved.

FIGS. 4A and 4B are cross-sectional views showing main parts of a pump motor 50 according to a modification of the present embodiment. In this modification, cooling channels 66A and 66B are used instead of the cooling channel 66. Also in this case, the same effects as those of the above-described embodiment can be obtained.

FIGS. 5A and 5B show a pump motor 50A according to a second embodiment of the present invention, FIG. 6 shows a main part, and FIG. It is a figure showing metallic mold 80 used for manufacture. In these figures, the same functional portions as those in FIGS. 1 to 3 described above are denoted by the same reference numerals, and detailed description thereof will be omitted.

The pump motor 50A is different from the above-described pump motor 50 in that a hole-shaped cooling channel 67 as shown in FIG. This is the point that was formed.

The housing body 61 having such a cooling passage 67 is formed by using a mold 84 as shown in FIG.
In FIG. 7, reference numeral 85 denotes an upper die, 86 denotes a lower die, and 87 denotes a cavity filled with resin.

The pump motor 50 thus configured
Also in A, since the liquid L can be introduced into the cooling channel 67, the motor efficiency and the pump efficiency can be improved.

FIGS. 8A and 8B are cross-sectional views showing the main parts of a pump motor 50A according to a modification of the present embodiment. In this modification, cooling channels 67A and 67B are used instead of the cooling channel 66. Also in this case, the same effects as those of the above-described embodiment can be obtained.

FIG. 9 is a longitudinal sectional view showing a pump motor 90 according to a third embodiment of the present invention. The pump motor 90 includes a housing 100 made of a resin material and an electric motor unit 110. The housing 100 includes a housing main body 101 formed in a cylindrical shape, a cylindrical bearing support portion 102 provided coaxially inside the housing main body 101 and supporting bearings 114 and 115 described below, and a housing main body. And a cover 103 that covers the opening at the right side of FIG. The lid 103 has a connection portion 103a connected to a connection pipe (not shown) connected to the tank. Note that a flow path 104 of the liquid L is formed in a gap between the housing main body 101 and the bearing support portion 102.

The motor section 110 is integrally formed with the bearing support section 102 and is provided with a stator (stator) 111 disposed at a position surrounded by the flow path 104 and a shaft disposed coaxially within the bearing support section 102. 112 and this shaft 1
(Rotor) 113 attached to one end of the rotor 12
And a pair of bearings 114 and 11 that support the shaft 112.
5 is provided.

The stator 111 has a laminated core 111a and a coil 111b attached to the core 111a. On the other hand, the bearing support 10
2, a groove-like cooling flow path 105 communicating with the flow path 104 up to the vicinity of the coil portion 111 b of the stator 111 is formed.

The pump motor 80 thus configured
Then, when the electric motor unit 110 is driven, the rotor 113 rotates. Accordingly, the shaft 112 rotates, and the pump device is driven. Accordingly, the liquid L introduced from the connection pipe into the inside of the housing body 101 flows through the flow path 104 and is sent to the pump device.

A part of the liquid L is introduced into the cooling channel 105. The liquid L introduced into the cooling passage 105
Cools the heated coil portion 111b. Therefore,
The thermal resistance of the motor unit 110 can be reduced, and the motor efficiency can be improved.

On the other hand, the liquid L flows not only through the flow path 104 but also through the cooling flow path 105.
4, the flow rate of the liquid L can be increased without increasing the pump efficiency, and the pump efficiency can be improved. It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0036]

According to the first aspect of the present invention, the fixed member is provided integrally with the resin material housing in which the flow path through which the fluid flows is formed, and is disposed at a position surrounding the flow path. Since the child has a coil portion, and the casing is provided with a cooling channel near the coil portion, heat generated in the coil portion is easily radiated to the fluid. Therefore, the thermal resistance can be reduced.

On the other hand, since the flow path can be sufficiently secured without widening the gap between the stator and the rotor, the pump efficiency can be increased without lowering the motor efficiency.

According to the second aspect of the present invention, the stator integrally provided with the bearing support disposed in the flow passage has a coil portion, and the bearing support has the coil portion. Since a cooling channel is provided in the vicinity, heat generated in the coil portion can be easily radiated to the fluid. Therefore, the thermal resistance can be reduced.

On the other hand, since the flow path can be sufficiently secured without widening the gap between the stator and the rotor, the pump efficiency can be increased without lowering the motor efficiency.

[Brief description of the drawings]

FIG. 1 is a view showing a pump motor according to a first embodiment of the present invention, wherein FIG. 1 (a) is a cross section taken along a line BB in FIG. FIG. 2B is a cross-sectional view taken along a line AA in FIG.

FIG. 2 is an enlarged sectional view showing a main part of the pump motor.

FIG. 3 is a vertical sectional view showing a mold used for manufacturing the pump motor.

FIG. 4 is an enlarged view of a main part showing a modification of the pump motor.

FIGS. 5A and 5B are views showing a pump motor according to a second embodiment of the present invention, wherein FIG. 5A is a cross-section taken along the line DD in FIG. FIG. 2B is a cross-sectional view taken along the line CC in FIG.

FIG. 6 is an enlarged sectional view showing a main part of the pump motor.

FIG. 7 is a vertical sectional view showing a mold used for manufacturing the pump motor.

FIG. 8 is an enlarged view of a main part showing a modified example of the pump motor.

FIG. 9 is a longitudinal sectional view showing a pump motor according to a third embodiment of the present invention.

FIG. 10 is a view showing a conventional pump motor,
(A) is a sectional view taken along the line YY in (b) and viewed in the direction of the arrow, and (b) is XX in (a).
Sectional drawing cut | disconnected in the position shown by the line and seen in the arrow direction.

FIG. 11 is an enlarged sectional view showing a main part of the pump motor.

[Explanation of symbols]

 50, 50A, 80 ... Pump motor 60, 90 ... Housing 61, 91 ... Housing main body 62, 92 ... Bearing support 64, 94 ... Flow path 66, 67, 105 ... Cooling flow path 70, 110 ... Electric motor Units 71, 111: Stator (stator) 71a, 111a: Core unit 71b, 111b: Coil 72, 112: Shaft 73, 113: Rotor (rotor)

Claims (2)

[Claims] 1. A pump motor for driving a fluid pump for sending out a fluid, comprising: a housing having a flow passage through which the fluid flows; and a housing provided integrally with the housing and surrounding the flow passage. A stator disposed at a position, a rotor disposed within the flow path, and a shaft connected to the rotor for driving the fluid pump, wherein the stator has a coil unit, A pump motor, wherein a cooling channel for introducing the fluid is provided near the coil unit in the housing. 2. A pump motor for driving a fluid pump for sending out a fluid, comprising: a housing having a flow path through which the fluid flows; a bearing support disposed in the flow path; A stator provided integrally with the bearing support, a rotor disposed at a position surrounding the bearing support in the flow path, and connected to the rotor and supported by the bearing support; And a shaft for driving the fluid pump, wherein the stator has a coil portion, and the bearing support portion is provided with a cooling channel for introducing the fluid near the coil portion. A pump motor.