阅读说明：本技术 通过液压流体的电机冷却 (Electric machine cooling by means of hydraulic fluid ) 是由 沃纳·汉德勒 阿希姆·黑尔比希 于 2020-05-05 设计创作，主要内容包括：根据本发明的液压系统包括：液压回路,所述液压回路具有低压区和高压区；由第一电动机驱动的体积和/或转速可变的液压机,所述液压机具有入口和出口并且在所述液压回路的所述高压区中提供液压流体的体积流量。此外,根据本发明的液压系统还包括：至少一个可动轴,所述轴布置在所述液压回路的所述高压区处；至少一个阀,所述阀将所述高压区与所述低压区分离开；和至少一个液压流体容器,所述液压流体容器与所述液压回路的所述低压区通过液压方式连接。根据本发明的液压系统此外具有：排放管,所述排放管将来自所述液压机的泄漏的液压流体排放出去；冷却管,用于输送所述液压流体以冷却所述电动机,其中所述排放管和所述冷却管与所述液压流体容器中的至少一个流体连接。(The hydraulic system according to the invention comprises: a hydraulic circuit having a low pressure region and a high pressure region; a variable volume and/or speed hydraulic machine driven by a first electric motor, the hydraulic machine having an inlet and an outlet and providing a volumetric flow of hydraulic fluid in the high pressure region of the hydraulic circuit. Furthermore, the hydraulic system according to the present invention further comprises: at least one movable shaft arranged at the high pressure region of the hydraulic circuit; at least one valve separating the high pressure zone from the low pressure zone; and at least one hydraulic fluid reservoir hydraulically connected to the low pressure region of the hydraulic circuit. The hydraulic system according to the invention furthermore has: a drain pipe that drains leaked hydraulic fluid from the hydraulic machine; a cooling tube for conveying the hydraulic fluid to cool the electric motor, wherein the drain tube and the cooling tube are fluidly connected to at least one of the hydraulic fluid reservoirs.)

1. A hydraulic system (1) comprising:

a hydraulic circuit, wherein the hydraulic circuit has a low pressure region (2) and a high pressure region (4);

a variable volume and/or speed hydraulic machine (11) driven by a first electric motor (10), having an inlet and an outlet and providing a volume flow of hydraulic fluid in the high pressure zone (4) of the hydraulic circuit;

at least one movable shaft (20), wherein the shaft (20) is arranged at the high pressure region (4) of the hydraulic circuit;

at least one valve (30) separating the high pressure zone (4) from the low pressure zone (2);

at least one hydraulic fluid reservoir (50,52) hydraulically connected to the low pressure region (2) of the hydraulic circuit;

a discharge pipe (62) that discharges leaked hydraulic fluid from the hydraulic machine (11) away from the hydraulic machine (11);

a cooling pipe (64) for conveying the hydraulic fluid to cool the electric motor (10);

it is characterized in that the preparation method is characterized in that,

the drain tube (62) and the cooling tube (64) are fluidly connected to at least one of the hydraulic fluid containers (50, 52).

2. The hydraulic system (1) of claim 1, characterized in that the drain (62) and the cooling pipe (64) are fluidly connected in series or in parallel with at least one of the hydraulic fluid containers (50, 52).

3. Hydraulic system (1) according to one of the preceding claims, characterized in that the valve (30) is a check valve, in particular a controlled check valve.

4. Hydraulic system (1) according to one of the preceding claims, characterized in that a supply flow (66) is hydraulically connected with the hydraulic circuit in the low-pressure region (2).

5. Hydraulic system (1) according to one of the preceding claims, characterized in that the drain (62) and/or the cooling pipe (64) are hydraulically connected with the hydraulic circuit in the low-pressure zone (2) by means of the supply flow (66).

6. Hydraulic system (1) according to claim 4, characterized in that at the supply flow (66) of the exhaust pipe (62) and/or the cooling pipe (64) there is arranged a second hydraulic machine (110) of variable volume and/or speed driven by an electric motor (100).

7. Hydraulic system (1) according to one of the preceding claims, characterized in that a throttle valve (70) is arranged at the supply flow (66) of the drain pipe (62) and/or the cooling pipe (64).

8. The hydraulic system (1) according to one of the preceding claims, characterized in that the hydraulic fluid container (50) is arranged in the low pressure region (2).

9. Hydraulic system (1) according to claim 7, characterized in that the hydraulic fluid container (50) is a closed container, in particular an accumulator.

10. Hydraulic system (1) according to one of claims 7 and 8, characterized in that a further hydraulic fluid container (52) is arranged in the low pressure region (2).

11. Hydraulic system (1) according to claim 9, characterized in that the first hydraulic fluid container (50) is a closed container, in particular an accumulator, and the further hydraulic fluid container (52) is a pressureless, in particular open container.

12. Hydraulic system (1) according to claim 9, characterised in that a further hydraulic machine (210) is arranged between the low-pressure region (2) of the hydraulic circuit and the further hydraulic fluid container (52).

13. The hydraulic system (1) according to one of the claims 9 to 11, characterized in that the drain pipe (62) and the cooling pipe (64) are fluidly connected with the second hydraulic fluid container (52).

14. Hydraulic system (1) according to one of the claims 9 to 12, characterized in that the supply flow (66) of the drain pipe (62) and/or the cooling pipe (64) is fluidly connected with the further hydraulic fluid container (52).

15. Hydraulic system (1) according to one of the preceding claims, characterized in that a cooler is arranged in the low pressure zone (2) or at the supply flow (66) or at the discharge pipe or at the cooling pipe or at one of the hydraulic fluid containers.

16. Method of using a hydraulic circuit (1) according to one of the preceding claims, characterized in that it uses hydraulic fluid, in particular also leaked hydraulic fluid from the hydraulic machine (11), for cooling the hydraulic machine (11) and/or the electric motor (10).