Motor cooling system and vehicle

Abstract

The utility model provides a motor cooling system and a vehicle, and relates to the technical field of cooling. The motor cooling system provided by the utility model comprises a first filter, a hydraulic pump, an oil cooler, a flow electromagnetic valve, a first motor, a second motor and an oil tank, an oil inlet of the first filter is communicated with the oil tank, and an oil suction port of the hydraulic pump is communicated with an oil outlet of the first filter; an oil inlet of the oil cooler is communicated with an oil outlet of the hydraulic pump, the oil cooler is used for cooling oil output from the hydraulic pump, the flow electromagnetic valve comprises an oil inlet, a first oil outlet and a second oil outlet, an oil outlet of the oil cooler is communicated with an oil inlet of the flow electromagnetic valve, the first oil outlet is communicated with an oil inlet of the first motor, and the second oil outlet is communicated with an oil outlet of the second motor. The second oil outlet communicates with an oil inlet of the second motor, and an oil outlet of the first motor and an oil outlet of the second motor both communicate with the oil tank. The motor cooling system and the vehicle provided by the utility model are simple in structure and good in motor temperature adjusting effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to cooling technical field especially relates to a motor cooling system and vehicle. BACKGROUND

[0002] At present, vehicle electric drive system is developing from single motor to double motor system, water-cooled motor to oil-cooled motor. Among them, the two motors in the double motor system often exist the situation that the working power is inconsistent, which leads to the working temperature difference of the two motors is large, in order to prevent the motor temperature is too high, the flow of the cooling oil input to the two motors needs to be adjusted, however, the existing oil cooling system has the problems of complex structure and poor motor temperature adjusting effect. SUMMARY

[0003] In order to solve at least one problem mentioned in the background art, the utility model provides a motor cooling system and vehicle, simple structure, good motor temperature adjusting effect.

[0004] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0005] Firstly, the utility model provides a motor cooling system, including first filter, hydraulic pump, oil cooler, flow electromagnetic valve, first motor, second motor and oil tank, the oil inlet of first filter is communicated with oil tank, the oil suction port of hydraulic pump is communicated with the oil outlet of first filter, so as to filter the cooling oil sucked from oil tank through first filter;

[0006] The oil inlet of oil cooler is communicated with the oil outlet of hydraulic pump, and the oil cooler is used for cooling the oil output from the hydraulic pump, the flow electromagnetic valve includes the oil inlet, the first oil outlet and the second oil outlet, the oil outlet of oil cooler is communicated with the oil inlet of flow electromagnetic valve, the first oil outlet is communicated with the oil inlet of first motor, and the second oil outlet is communicated with the oil inlet of second motor, the oil outlet of first motor and the oil outlet of second motor are both communicated with oil tank, and the flow electromagnetic valve is configured to adjust the flow of the cooling oil entering first motor and second motor by controlling the opening and closing degree of first oil outlet and second oil outlet.

[0007] As an optional implementation, it further includes second filter, the oil inlet of second filter is communicated with the oil outlet of oil cooler, and the oil outlet of second filter is communicated with the oil inlet of flow electromagnetic valve.

[0008] As an optional implementation, the precision of second filter is greater than that of first filter.

[0009] As an optional implementation, it further includes overflow valve, the oil inlet of overflow valve is communicated with the oil outlet of second filter, and the oil outlet of overflow valve is communicated with oil tank.

[0010] As an optional implementation, a first one-way valve is further included, an oil inlet of the first one-way valve is communicated with an oil outlet of the oil cooler, and an oil outlet of the first one-way valve is communicated with an oil inlet of the second filter.

[0011] As an optional implementation, a second one-way valve is further included, the oil outlet of the first motor and the oil outlet of the second motor are both communicated with an oil inlet of the second one-way valve, and an oil outlet of the second one-way valve is communicated with the oil tank.

[0012] As an optional implementation, a flow sensor is further included, the flow sensor is arranged at the first oil outlet and the second oil outlet, respectively, and the flow sensor is used for measuring the flow of the cooling oil flowing out of the first oil outlet and the second oil outlet.

[0013] As an optional implementation, a controller is further included, the flow electromagnetic valve, the first motor, the second motor and the flow sensor are electrically connected with the controller, and the controller is used for adjusting the flow of the cooling oil of the first oil outlet and the second oil outlet of the flow electromagnetic valve according to the temperature parameters of the first motor and the second motor.

[0014] As an optional implementation, a display is further included, the display is electrically connected with the controller, and the display is used for displaying the flow of the cooling liquid flowing into the first motor and the second motor in real time.

[0015] In a second aspect, the utility model further provides a kind of vehicle, including motor and the motor cooling system in first aspect, and the motor cooling system is used to cool the motor.

[0016] The motor cooling system provided by the utility model includes a first filter, a hydraulic pump, an oil cooler, a flow electromagnetic valve, a first motor, a second motor and an oil tank. The oil inlet of the first filter is communicated with the oil tank. The oil suction port of the hydraulic pump is communicated with the oil outlet of the first filter to filter the cooling oil sucked from the oil tank through the first filter. The oil inlet of the oil cooler is communicated with the oil outlet of the hydraulic pump. The oil cooler is used to cool the oil output from the hydraulic pump. The flow electromagnetic valve includes an oil inlet, a first oil outlet and a second oil outlet. The oil outlet of the oil cooler is communicated with the oil inlet of the flow electromagnetic valve. The first oil outlet is communicated with the oil inlet of the first motor. The second oil outlet is communicated with the oil inlet of the second motor. The oil outlet of the first motor and the oil outlet of the second motor are both communicated with the oil tank. The flow electromagnetic valve is configured to adjust the flow of the cooling oil into the first motor and the second motor by controlling the opening and closing degree of the first oil outlet and the second oil outlet.

[0017] The motor cooling system provided by the utility model, hydraulic oil enters first motor and second motor in turn through first filter, hydraulic pump, oil cooler and flow electromagnetic valve, wherein, the impurity in the cooling oil can be filtered through the first filter, the oil is ensured to be clean, the equipment failure is reduced, the oil cooler can cool the oil, the oil is divided into two ways after entering the flow electromagnetic valve after cooling, the opening and closing degree of the first oil outlet and the second oil outlet can be controlled respectively by controlling the action of the flow electromagnetic valve, for example, when the temperature of the first motor is higher than the temperature of the second motor, the opening and closing degree of the first oil outlet can be controlled to increase, and the opening and closing degree of the first oil outlet is controlled to reduce, thereby the flow of the cooling liquid entering the first motor is increased, the flow of the cooling liquid entering the second motor is reduced, the temperature of the first motor and the temperature of the second motor tend to be the same, and the motor with the temperature being too high is avoided from being damaged. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0019] Figure 1 The schematic diagram of the motor cooling system provided by the utility model embodiment.

[0020] Mark explanation:

[0021] 100 - motor cooling system;

[0022] 110 - first filter;

[0023] 120 - hydraulic pump;

[0024] 130 - oil cooler;

[0025] 140 - flow electromagnetic valve;

[0026] 150 - first motor;

[0027] 160 - second motor;

[0028] 170 - oil tank;

[0029] 180 - second filter;

[0030] 190 - overflow valve;

[0031] 200 - first check valve;

[0032] 210 - second one-way valve;

[0033] 220 - flow sensor. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] In the application, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like are the orientations or positional relationships shown based on the drawings. These terms are mainly used for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0036] In addition, in addition to being used to indicate the orientations or positional relationships, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. Those skilled in the art can understand the specific meanings of these terms in the present application according to the specific circumstances.

[0037] In addition, the terms "mount", "set", "provided with", "connect", "connected" should be understood broadly. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two devices, elements or components. Those skilled in the art can understand the specific meanings of the above-mentioned terms in the present application according to the specific circumstances.

[0038] In addition, the terms "first", "second" and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "multiple" is two or more.

[0039] At present, the vehicle electric drive system is developing from single motor to double motor system, and from water-cooled motor to oil-cooled motor. Among them, the two motors in the double motor system often have inconsistent working power, resulting in a large difference in the working temperature of the two motors. In order to prevent the motor temperature from being too high, the flow of the cooling oil input into the two motors needs to be adjusted. However, the existing oil cooling system has the problems of complex structure and poor motor temperature adjusting effect.

[0040] Therefore, the motor cooling system provided by the utility model has the advantages of simple structure, convenient motor temperature adjusting, and good adjusting effect.

[0041] Figure 1 A schematic diagram of the motor cooling system provided by the utility model embodiment is shown in FIG. 1. Figure 1 The utility model embodiment provides a motor cooling system 100, which comprises a first filter 110, a hydraulic pump 120, an oil cooler 130, a flow electromagnetic valve 140, a first motor 150, a second motor 160, and an oil tank 170. The oil inlet of the first filter 110 is connected to the oil tank 170, and the oil suction port of the hydraulic pump 120 is connected to the oil outlet of the first filter 110, so as to filter the cooling oil sucked from the oil tank 170 through the first filter 110. The oil inlet of the oil cooler 130 is connected to the oil outlet of the hydraulic pump 120, and the oil cooler 130 is used for cooling the oil output from the hydraulic pump 120. The flow electromagnetic valve 140 comprises an oil inlet, a first oil outlet, and a second oil outlet. The oil outlet of the oil cooler 130 is connected to the oil inlet of the flow electromagnetic valve 140, the first oil outlet is connected to the oil inlet of the first motor 150, and the second oil outlet is connected to the oil inlet of the second motor 160. The oil outlet of the first motor 150 and the oil outlet of the second motor 160 are both connected to the oil tank 170. The flow electromagnetic valve 140 is configured to adjust the flow of the cooling oil into the first motor 150 and the second motor 160 by controlling the opening and closing degree of the first oil outlet and the second oil outlet.

[0042] In the above embodiment, a second filter 180 can also be included, with an oil inlet of the second filter 180 being communicated with an oil outlet of the oil cooler 130, and an oil outlet of the second filter 180 being communicated with an oil inlet of the flow electromagnetic valve 140. After the hydraulic oil is cooled by the oil cooler 130, the cooled oil directly flows out of the oil outlet of the oil cooler 130 and enters the second filter 180, and the second filter 180 can effectively intercept fine impurities that still exist after passing through the first filter 110 and newly generated in the heat exchange link of the oil cooler 130, such as tiny metal oxide particles, and debris falling off the inner wall of the cooling pipeline. Once these impurities enter the flow electromagnetic valve 140, long-term accumulation will hinder the normal flexible movement of the electromagnetic valve core, making it difficult to accurately control the opening degree of the first and second oil outlets, and unable to accurately adjust the flow of the cooling liquid into the two motors. If the impurities enter the motor, it will accelerate the wear of the internal components of the motor and reduce the service life of the motor. By setting the second filter 180, the risk of such impurities can be reduced, and the purity of the cooling liquid entering the flow electromagnetic valve 140 can be ensured to be extremely high, so that the flow electromagnetic valve 140 can continuously and accurately distribute the cooling liquid according to the temperature difference between the two motors, and ensure that the two motors stably obtain the appropriate cooling effect.

[0043] In the above embodiment, the precision of the second filter 180 can be greater than the precision of the first filter 110. In the initial stage of the cooling process, the first filter 110 first plays a role to intercept and filter larger particle impurities in the cooling oil sucked from the oil tank 170, such as dust and metal shavings with a diameter greater than a certain size, to achieve preliminary purification of the oil and reduce the risk of damage to subsequent components. Then, the oil cooled by the oil cooler 130 flows into the second filter 180 with higher precision, which can accurately capture fine impurities that the first filter 110 fails to remove, due to the finer filter screen structure or special filter medium. By cross-filtering the first filter 110 and the second filter 180 with different precisions, the purity of the cooling liquid flowing into the flow electromagnetic valve 140 can be further ensured, and the flow regulation performance of the flow electromagnetic valve 140 can be maintained.

[0044] In the above embodiment, an overflow valve 190 can also be included, with an oil inlet of the overflow valve 190 being communicated with an oil outlet of the second filter 180, and an oil outlet of the overflow valve 190 being communicated with the oil tank 170. It can be understood that, under normal circumstances, the pressure in the system is within a reasonable range, and the cooling oil will flow along the established route, smoothly from the oil inlet of the overflow valve 190, to the subsequent flow electromagnetic valve 140, and continue to participate in the cooling process of the motor. However, once the system is abnormal, such as due to filter clogging, sudden drop in heat exchange efficiency of the oil cooler 130, or failure of the flow electromagnetic valve 140, etc., causing the system pressure to rise sharply, exceeding the preset safety threshold, the overflow valve 190 will play a role, allowing excess cooling oil to flow directly from the oil outlet thereof to the oil tank 170, thereby timely relieving the excessive pressure in the system, avoiding irreversible damage to precision components such as the hydraulic pump 120, filter, electromagnetic valve, etc. in the system due to high pressure impact, reducing the risk of failure, and ensuring the continuous and stable cooling of the dual-motor system.

[0045] In the above embodiment, a first check valve 200 can also be included, with an oil inlet of the first check valve 200 being communicated with an oil outlet of the oil cooler 130, and an oil outlet of the first check valve 200 being communicated with an oil inlet of the second filter 180. In the normal cooling circulation process, the cooling oil can smoothly flow from the oil inlet of the first check valve 200 to the oil outlet thereof, and then be communicated to the oil inlet of the second filter 180, ensuring that the oil continues to advance along the preset positive path, and laying a good foundation for the subsequent fine filtering and cooling process to the motor. In this process, the first check valve 200 effectively prevents the phenomenon of backflow of the oil, avoiding problems such as mixing of cooled and uncooled oil, which can cause a significant reduction in cooling effect; and also prevents the oil from impacting the oil cooler 130 in the reverse direction, protecting the heat exchange structure inside the oil cooler 130 and prolonging its service life.

[0046] In the above embodiment, the second one-way valve 210 can also be included, the oil outlet of the first motor 150 and the oil outlet of the second motor 160 are communicated to the oil inlet of the second one-way valve 210, and the oil outlet of the second one-way valve 210 is communicated to the oil tank 170. In normal operation, the used cooling oil can flow from the oil inlet of the second one-way valve 210 to the oil outlet thereof without any obstruction, and then to the oil tank 170, ensuring smooth return of the hot oil and completing the closed loop of the entire cooling cycle. During this process, the second one-way valve 210 can effectively prevent the oil in the oil tank 170 from flowing back to the motor, avoid the re-introduction of impurities into the motor due to backflow, protect the motor winding, bearing and other key components from secondary pollution, and prolong the service life of the motor. Moreover, the first one-way valve 200 and the second one-way valve 210 can work cooperatively, the first one-way valve 200 controls the forward flow of the cooling oil from the oil cooler 130 to the second filter 180, and prevents the backflow from damaging the cooling effect and the oil cooler 130; the second one-way valve 210 ensures that the motor oil flows back to the oil tank 170 in one direction, and prevents the backflow from polluting the motor. Even if the system encounters extreme working conditions such as sudden power failure and severe vibration, the two one-way valves can still stably control the flow direction of the oil, ensure the integrity of the entire cooling system architecture, and maintain the efficient and stable operation of the motor cooling system 100 under various complex conditions.

[0047] In the above embodiment, the flow sensor 220 can also be included, and the flow sensor 220 is arranged at the first oil outlet and the second oil outlet, and is used to measure the flow of the cooling oil flowing out of the first oil outlet and the second oil outlet, respectively. In addition, a controller can also be included, and the flow electromagnetic valve 140, the first motor 150, the second motor 160 and the flow sensor 220 are electrically connected to the controller, and the controller is used to adjust the flow of the cooling oil at the first oil outlet and the second oil outlet of the flow electromagnetic valve 140 according to the temperature parameters of the first motor 150 and the second motor 160. It can be understood that the controller can obtain the temperature of the two motors in real time through devices such as temperature sensors, and the flow sensor 220 also synchronously and accurately measures the flow of the cooling oil flowing to the motor and transmits data to the controller. During operation, if the first motor 150 is heated due to long-time high load or high-temperature environment, the controller compares the threshold value, retrieves the corresponding oil outlet flow value, and if the flow is less than the best flow required by the current temperature, an algorithm is generated to drive the electromagnetic actuator of the flow electromagnetic valve 140 through an electrical signal, accurately control the current of the electromagnetic coil, and make the spool accurately displace and increase the opening degree of the first oil outlet, so that more cooling oil flows into the first motor 150 to cool and heat, thereby realizing dynamic and accurate adjustment of the flow of the cooling oil according to the temperature of the motor, and ensuring reliable operation of the dual-motor system.

[0048] In the above embodiment, the display and the controller are electrically connected, and the display is used to display the flow rate of the cooling liquid flowing into the first motor 150 and the second motor 160 in real time. The controller can transmit the obtained cooling liquid flow rate data flowing into the first motor 150 and the second motor 160 to the display in real time while dynamically and accurately adjusting the flow electromagnetic valve 140 according to the motor temperature. After receiving the data, the display presents the real-time flow rate of the cooling liquid of the two motors through an intuitive and clear interface, such as in the form of numbers, column charts or dynamic flow rate diagrams, so as to facilitate the staff to more intuitively and real-timely control the working condition of the motor, and ensure that the double-motor system is stably and reliably operated.

[0049] In addition, the utility model embodiment further provides a vehicle, including motor and the motor cooling system 100 in above -mentioned embodiment, the motor cooling system 100 is used to cool the motor, and this includes first filter 110, hydraulic pump 120, oil cooler 130, flow electromagnetic valve 140, first motor 150, second motor 160 and oil tank 170, and hydraulic oil enters first motor 150 and second motor 160 after passing through first filter 110, hydraulic pump 120, oil cooler 130 and flow electromagnetic valve 140 in sequence, wherein the impurity in the cooling oil can be filtered through first filter 110, ensure the cleanliness of oil, reduce equipment failure, oil cooler 130 can cool the oil, and the oil enters flow electromagnetic valve 140 after cooling and is divided into two ways, the opening degree of first oil outlet and second oil outlet can be controlled by controlling the action of flow electromagnetic valve 140, for example, when the temperature of first motor 150 is higher than the temperature of second motor 160, the opening degree of first oil outlet can be controlled to increase, and the opening degree of first oil outlet is controlled to reduce, thereby increasing the flow rate of the cooling liquid entering first motor 150, reducing the flow rate of the cooling liquid entering second motor 160, making the temperature of first motor 150 and the temperature of second motor 160 tend to be the same, and avoiding that a certain motor is damaged due to excessively high temperature. Therefore, the motor cooling system 100 provided by the utility model embodiment has the advantages of simple structure, convenient adjustment of motor temperature and good adjustment effect, improves the reliability of the vehicle in the embodiment, and reduces the failure rate of the vehicle.

[0050] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An electric machine cooling system characterized by, The system comprises a first filter, a hydraulic pump, an oil cooler, a flow electromagnetic valve, a first motor, a second motor and an oil tank, an oil inlet of the first filter is communicated with the oil tank, an oil suction port of the hydraulic pump is communicated with an oil outlet of the first filter to filter the cooling oil sucked from the oil tank through the first filter; An oil inlet of the oil cooler is communicated with an oil outlet of the hydraulic pump, the oil cooler is used for cooling the oil output from the hydraulic pump, the flow electromagnetic valve comprises an oil inlet, a first oil outlet and a second oil outlet, an oil outlet of the oil cooler is communicated with the oil inlet of the flow electromagnetic valve, the first oil outlet is communicated with an oil inlet of the first motor, the second oil outlet is communicated with an oil inlet of the second motor, an oil outlet of the first motor and an oil outlet of the second motor are both communicated with the oil tank, the flow electromagnetic valve is configured to adjust the flow of the cooling oil entering the first motor and the second motor by controlling the opening and closing degree of the first oil outlet and the second oil outlet.

2. The motor cooling system of claim 1, wherein, Further comprising a second filter, an oil inlet of the second filter is communicated with an oil outlet of the oil cooler, and an oil outlet of the second filter is communicated with an oil inlet of the flow electromagnetic valve.

3. The motor cooling system of claim 2, wherein, The precision of the second filter is greater than that of the first filter.

4. The electric machine cooling system of claim 3, wherein, Further comprising an overflow valve, an oil inlet of the overflow valve is communicated with an oil outlet of the second filter, and an oil outlet of the overflow valve is communicated with the oil tank.

5. The motor cooling system of claim 4, wherein, Further comprising a first check valve, an oil inlet of the first check valve is communicated with an oil outlet of the oil cooler, and an oil outlet of the first check valve is communicated with an oil inlet of the second filter.

6. The electric machine cooling system of claim 5, wherein, Further comprising a second check valve, an oil outlet of the first motor and an oil outlet of the second motor are both communicated with an oil inlet of the second check valve, and an oil outlet of the second check valve is communicated with the oil tank.

7. The motor cooling system of claim 6, wherein, Further comprising a flow sensor, the flow sensor is arranged at the first oil outlet and the second oil outlet respectively, and the flow sensor is used for measuring the flow of the cooling oil flowing out of the first oil outlet and the second oil outlet respectively.

8. The electric machine cooling system of claim 7, wherein, Further comprising a controller, the flow electromagnetic valve, the first motor, the second motor and the flow sensor are all electrically connected with the controller, and the controller is used for adjusting the flow of the cooling oil of the first oil outlet and the second oil outlet of the flow electromagnetic valve according to the temperature parameters of the first motor and the second motor.

9. The motor cooling system of claim 8, wherein, Further comprising a display, the display is electrically connected with the controller, and the display is used for displaying the flow of the cooling liquid flowing into the first motor and the second motor in real time.

10. A vehicle characterized by comprising: The system comprises a motor and the motor cooling system described in any one of claims 1-9, and the motor cooling system is used for cooling the motor.

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