PUMP DEVICE

Abstract

A pump device, in particular for a fluid circuit in a motor vehicle, comprising a stator, which has a stator core and a main body, and a rotor, wherein the rotor can be set in rotation relative to the stator, wherein the stator core is enclosed by the main body in a fluid-tight manner, and wherein the main body comprises a thermoset and a thermoplastic.

Claims

1. A pump for a fluid circuit in a motor vehicle, the pump comprising: a stator that has a stator core and a main body; and a rotor adapted to be set in rotation relative to the stator, wherein the stator core is enclosed by the main body in a fluid-tight manner, and wherein the main body comprises a thermoset and a thermoplastic.

2. The pump according to claim 1, wherein an inner region of the main body comprises the thermoset and an outer region of the main body comprises the thermoplastic.

3. The pump according to claim 1, wherein the thermoset forms a base region of the main body.

4. The pump according to claim 1, wherein the thermoplastic forms a sheath for the base region.

5. The pump according to claim 1, wherein the sheath is connected to a further component of the pump device.

6. The pump according to claim 1, wherein the sheath comprises one or more weld zones.

7. The pump according to claim 1, wherein the pump comprises a seal, wherein the seal is arranged between the thermoplastic and the thermoset.

8. The pump according to claim 1, wherein the seal is formed annular.

9. The pump according to claim 1, wherein the stator core comprises windings of electromagnetic coils.

10. A motor vehicle, comprising a fluid circuit and a pump according to claim 1, wherein the pump is designed to pump a fluid through the fluid circuit.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus, are not limitive of the present invention, and wherein:

[0018] FIG. 1 shows a schematic perspective view of a pump device according to an example of the invention; and

[0019] FIG. 2 shows a schematic sectional view of the pump device from FIG. 1.

DETAILED DESCRIPTION

[0020] Pump device 100 comprises a housing 101, an inlet 102, and an outlet 103. Pump device 100 is designed to be connected to a fluid circuit with inlet 102 and outlet 103. In operation, pump device 100 causes a flow of the fluid in the fluid circuit.

[0021] For this purpose, a rotor 200 is disposed within pump device 100, which rotates relative to a stator during operation. The stator comprises an inner region 201 and an outer region 202. Inner region 201 faces rotor 200 whereas outer region 202 is directed away from rotor 200. Inner region 201 consists of a thermoset, whereas outer region 202 consists of a thermoplastic. In addition, the stator comprises a stator core 203 with a plurality of windings of an electromagnetic coil used to drive rotor 200.

[0022] Stator core 203 is embedded in the thermoset of inner region 201. The thermoset has a similar coefficient of thermal expansion as stator core 203. When stator core 203 heats up during operation, the thermoset therefore expands in a manner similar to stator core 203, so that the risk of cracks or damage is reduced.

[0023] The thermoplastic in outer region 202 is more suitable than the thermoset for connecting to other components. Outer region 202 is welded to a cover 205 in region 206, for example. The weld zone hereby runs in a ring shape within outer region 202. In addition, outer region 202 is welded to a housing 207 in region 208. Here, outer region 202 has a circumferential rim.

[0024] A seal 204 is situated between inner region 201 and outer region 202, said seal that prevents the fluid from entering a gap between the thermoset and the thermoplastic. In this way, stator core 203 is reliably shielded from the fluid.

[0025] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.