Gearbox oil temperature management system applied to new energy commercial vehicle

Abstract

The utility model discloses a gearbox oil temperature management system applied to a new energy commercial vehicle and the new energy commercial vehicle, and relates to the technical field of new energy commercial vehicles. The system includes a motor cooling assembly, a circulation pump, a heat exchanger, a cooler, and a gearbox. The motor cooling assembly, the circulating pump, the heat exchanger and the cooler are connected in sequence. The motor cooling assembly can provide motor cooling liquid with the temperature higher than the first preset temperature for the circulating pump. And the motor cooling liquid can circulate along the loop under the action of the circulating pump. At least part of the structure of the heat exchanger is immersed by lubricating oil at the bottom of the gearbox. When the motor cooling liquid circulates to the heat exchanger, heat energy of the motor cooling liquid flowing in the heat exchanger can be transmitted to the lubricating oil, and the lubricating oil is heated. Therefore, the waste heat of the cooling liquid of the motor is used for heating the lubricating oil in the gear box, energy recycling is achieved, and no extra component needs to be arranged in the gear box.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of new energy commercial vehicles, in particular to a gear box oil temperature management system applied to a new energy commercial vehicle. BACKGROUND

[0002] In the gear box of the electric drive system, lubricating oil is usually used to lubricate the gears. When the vehicle starts and runs in cold areas, the temperature of the lubricating oil in the gear box is low, which results in a large viscosity of the lubricating oil. The viscous lubricating oil will reduce the operating efficiency of the gearbox, and even cause abnormal wear of the gear shaft.

[0003] In the prior art, a heating device is usually separately arranged in the gear box to heat the lubricating oil, such as the utility model patent with publication number CN213808802U.

[0004] However, this requires additional arrangement of a large number of components in the gear box, which increases the failure rate and has poor effect. UTILITY MODEL CONTENT

[0005] The present specification provides a gear box oil temperature management system applied to a new energy commercial vehicle to at least partially solve the above-mentioned problems existing in the prior art.

[0006] The present specification adopts the following technical solutions:

[0007] The present specification provides a gear box oil temperature management system applied to a new energy commercial vehicle, comprising a motor cooling assembly, a circulating pump, a heat exchanger, a cooler and a gear box.

[0008] The motor cooling assembly is connected with the circulating pump and can provide motor cooling liquid. The temperature of the motor cooling liquid provided by the motor cooling assembly is greater than a first preset temperature.

[0009] The circulating pump is also connected with the heat exchanger and can pump the motor cooling liquid to the heat exchanger.

[0010] The heat exchanger is arranged at the bottom of the gear box, and at least part of the structure of the heat exchanger is immersed in the lubricating oil at the bottom of the gear box. The heat exchanger can transfer the heat energy of the motor cooling liquid flowing inside to the lubricating oil to heat the lubricating oil. The heat exchanger is also connected with the cooler and can deliver the motor cooling liquid to the cooler.

[0011] Preferably, the motor is an oil-cooled motor.

[0012] The motor cooling liquid is motor oil cooling liquid.

[0013] Preferably, the motor cooling assembly outputs the motor cooling liquid into an oil sump; the oil sump is a lower half of a crankcase and is capable of storing the motor cooling liquid.

[0014] The circulating pump is capable of delivering the motor cooling liquid stored in the oil sump to the heat exchanger.

[0015] Preferably, the circulating pump is connected to a control center of the new energy commercial vehicle.

[0016] The circulating pump is capable of adjusting the unit flow of the motor cooling liquid.

[0017] Preferably, the heat exchanger is a plate heat exchanger, a copper tube heat exchanger, or a fin heat exchanger.

[0018] Preferably, the gear box oil temperature management system applied to the new energy commercial vehicle further comprises an uncooled branch.

[0019] An electronic three-way valve is arranged between the circulating pump and the heat exchanger; the electronic three-way valve is connected to the circulating pump, the heat exchanger, and the uncooled branch, respectively.

[0020] A three-way valve is arranged between the heat exchanger and the cooler; the three-way valve is connected to the cooler, the heat exchanger, and the uncooled branch, respectively.

[0021] Preferably, the electronic three-way valve is connected to the control center of the new energy commercial vehicle.

[0022] The electronic three-way valve is capable of controlling the flow of the motor cooling liquid flowing to the heat exchanger and the uncooled branch.

[0023] Preferably, the uncooled branch is not immersed in the lubricating oil at the bottom of the gear box.

[0024] Preferably, the three-way valve only allows the motor cooling liquid to flow from the uncooled branch to the cooler and the motor cooling liquid to flow from the heat exchanger to the cooler.

[0025] In another aspect, the present specification provides a new energy commercial vehicle, which comprises the gear box oil temperature management system applied to the new energy commercial vehicle provided in the above-mentioned aspect.

[0026] The above-mentioned at least one technical solution adopted by the present specification can achieve the following beneficial effects:

[0027] Based on the above-mentioned gear box oil temperature management system applied to new energy commercial vehicles, the system comprises a motor cooling assembly, a circulating pump, a heat exchanger, a cooler and a gear box. The motor cooling assembly, the circulating pump, the heat exchanger and the cooler are connected in sequence. The motor cooling assembly can provide the circulating pump with motor cooling liquid with a temperature greater than a first preset temperature. The motor cooling liquid can circulate along the above-mentioned circuit under the action of the circulating pump. At least part of the structure of the heat exchanger is immersed in the lubricating oil at the bottom of the gear box. The motor cooling liquid can transfer the heat energy of the motor cooling liquid flowing inside to the lubricating oil when circulating to the heat exchanger, thereby heating the lubricating oil.

[0028] As can be seen from the above, the waste heat of the motor cooling liquid can be used to heat the lubricating oil in the gear box, realizing the recycling of energy and without the need to additionally arrange components in the gear box. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the present specification, constitute a part of the present specification, the illustrative embodiments of the present specification and the description thereof are used to explain the present specification, and do not constitute an improper limitation on the present specification. In the drawings:

[0030] Figure 1 It is an architectural schematic diagram of a gear box oil temperature management system applied to new energy commercial vehicles in the present specification;

[0031] Figure 2 It is an architectural schematic diagram of a gear box oil temperature management system applied to new energy commercial vehicles in the present specification;

[0032] Figure 3 It is a partial structural schematic diagram of a gear box oil temperature management system applied to new energy commercial vehicles provided by an embodiment of the present specification.

[0033] Explanation of reference numerals: motor cooling assembly 1; circulating pump 2; heat exchanger 3; cooler 4; gear box 5; lubricating oil 6; uncooled branch 7. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present specification clearer, the technical scheme of the present specification will be described clearly and completely in combination with the specific embodiments of the present specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present specification, not all the embodiments. Based on the embodiments in the present specification, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of the present application.

[0035] In the description of the present application, it should be noted that the term "or" is generally used in the sense of "and / or", unless the context clearly indicates otherwise.

[0036] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense. In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0038] The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0039] Figure 1 The schematic diagram of a gear box 5 oil temperature management system applied to a new energy commercial vehicle in the present application is shown in Figure 1 The gear box 5 oil temperature management system applied to the new energy commercial vehicle includes a motor cooling assembly 1, a circulating pump 2, a heat exchanger 3, a cooler 4 and a gear box 5. The heat exchanger 3 is arranged at the bottom of the gear box 5, and at least part of the structure of the heat exchanger 3 is immersed in the lubricating oil 6 in the gear box 5.

[0040] Preferably, the new energy commercial vehicle is a new energy commercial vehicle.

[0041] Preferably, the motor cooling assembly 1 is connected with the circulating pump 2, and can provide motor cooling liquid for the circulating pump 2.

[0042] Preferably, the motor cooling assembly 1 can cool the motor by motor cooling liquid, and the motor cooling liquid can absorb the heat of the motor and increase the temperature during the cooling process.

[0043] Preferably, the temperature of the motor cooling liquid provided by the motor cooling assembly 1 is greater than a first preset temperature. The first preset temperature is a preset value, for example, 80 degrees Celsius, 90 degrees Celsius, etc.

[0044] Preferably, the circulating pump 2 is also connected with the heat exchanger 3, and can pump the motor cooling liquid to the heat exchanger 3.

[0045] Preferably, the heat exchanger 3 is arranged at the bottom of the gear box 5, and at least part of the structure of the heat exchanger 3 is immersed in the lubricating oil 6 at the bottom of the gear box 5.

[0046] Preferably, the heat exchanger 3 is capable of transferring the thermal energy of the motor coolant flowing inside to the lubricating oil 6, thereby heating the lubricating oil 6.

[0047] Preferably, the temperature of the motor coolant is greater than the first preset temperature. It should be noted that the temperature of the motor coolant may decrease to equal to or less than the first preset temperature when flowing through the circulating pump 2, but the temperature of the motor coolant is still higher than the temperature of the lubricating oil 6, thereby being capable of heating the lubricating oil 6.

[0048] Preferably, the heat exchanger 3 is further connected with the cooler 4, thereby being capable of delivering the motor coolant to the cooler 4.

[0049] As understood by those skilled in the art, the motor coolant is used in a circulating manner, i.e., after completing the cooling of the motor and the heating of the lubricating oil 6, the motor coolant is cooled by the cooler 4 and is recirculated to the motor cooling assembly 1 to cool the motor again. Thus, in one or more embodiments provided in the present specification, the heat exchanger 3 is capable of delivering the motor coolant to the cooler 4.

[0050] Preferably, the cooler 4 is further connected with the motor cooling assembly 1.

[0051] Preferably, the cooler 4 is capable of cooling the motor coolant.

[0052] Preferably, the cooler 4 is capable of providing the motor coolant to the motor cooling assembly 1.

[0053] Preferably, the motor cooling assembly 1, the circulating pump 2, the heat exchanger 3, and the cooler 4 are connected in sequence, and the cooler 4 is further connected with the motor cooling assembly 1.

[0054] Based on Figure 1 The oil temperature management system applied to the gearbox 5 of a new energy commercial vehicle is shown in the figure. The system includes a motor cooling assembly 1, a circulating pump 2, a heat exchanger 3, a cooler 4, and a gearbox 5. The motor cooling assembly 1, the circulating pump 2, the heat exchanger 3, and the cooler 4 are connected in sequence. The motor cooling assembly 1 is capable of providing the motor coolant with a temperature greater than a first preset temperature to the circulating pump 2. The motor coolant is capable of circulating along the above-mentioned circuit under the action of the circulating pump 2. At least part of the structure of the heat exchanger 3 is immersed in the lubricating oil 6 at the bottom of the gearbox 5. The motor coolant is capable of transferring the thermal energy of the motor coolant flowing inside to the lubricating oil 6 when circulating to the heat exchanger 3, thereby heating the lubricating oil 6.

[0055] From the above, the waste heat of the motor cooling liquid can be used to heat the lubricating oil 6 in the gearbox 5, realizing the recycling of energy and without the need to additionally arrange components in the gearbox 5.

[0056] Preferably, the motor is an oil-cooled motor, and the motor cooling liquid is motor oil cooling liquid. Alternatively, the motor is a general motor, and the motor cooling liquid is calcium chloride, methanol, ethanol, ethylene glycol, etc., and the type of the motor and the motor cooling liquid is not limited in the specification.

[0057] Preferably, the motor cooling assembly 1 can output the motor cooling liquid to the oil sump. The oil sump is the lower half of the crankcase and can store the motor cooling liquid. Then, the circulating pump 2 can deliver the motor cooling liquid stored in the oil sump to the heat exchanger 3.

[0058] That is, the motor cooling assembly 1 is not directly connected to the circulating pump 2, but is indirectly connected through the oil sump. The oil sump can temporarily store the motor cooling liquid, stabilize the delivery speed of the motor cooling liquid, reduce the pressure changes caused by too fast or too slow delivery of the motor cooling liquid, and improve the stability of the system.

[0059] Preferably, the circulating pump 2 is connected to the control center of the new energy commercial vehicle, and the unit flow of the motor cooling liquid delivered by the circulating pump 2 is adjustable. That is, the vehicle control center can send instructions to the circulating pump to control the unit flow of the motor cooling liquid delivered by the circulating pump 2.

[0060] Preferably, the heat exchanger 3 is a plate heat exchanger 3, a copper tube heat exchanger, or a fin heat exchanger, etc., which is not limited in the specification.

[0061] Preferably, the gearbox 5 oil temperature management system applied to the new energy commercial vehicle further comprises an uncooled branch 7. An electronic three-way valve is arranged between the circulating pump 2 and the heat exchanger 3, and the electronic three-way valve is connected to the circulating pump 2, the heat exchanger 3, and the uncooled branch 7, respectively. A three-way valve is arranged between the heat exchanger 3 and the cooler 4, and the three-way valve is connected to the cooler 4, the heat exchanger 3, and the uncooled branch 7, respectively.

[0062] Figure 2 The schematic diagram of the gearbox 5 oil temperature management system applied to the new energy commercial vehicle is provided for an embodiment of the specification. As shown in Figure 2 The motor cooling assembly 1, the circulating pump 2, the heat exchanger 3, the cooler 4, and the motor cooling assembly 1 are connected in sequence, and the circulating pump 2 and the cooler 4 are further connected through the uncooled branch 7.

[0063] Preferably, the electronic three-way valve is connected with the control center of the new energy commercial vehicle, and the electronic three-way valve can control the flow of the motor coolant flowing to the heat exchanger 3 and the uncooled branch 7. That is, the control center can send instructions to the three-way valve to control the opening of any valve in the three-way valve, thereby controlling the flow of the motor coolant flowing to the heat exchanger 3 and the uncooled branch 7. Further, the more the motor coolant flowing to the heat exchanger 3, the better the heating effect on the lubricating oil 6, and the less the motor coolant flowing to the heat exchanger 3, the worse the heating effect on the lubricating oil 6.

[0064] As can be understood by those skilled in the art, the lubricating oil 6 is used to lubricate the gears in the gear box 5 that are in meshing and rotating. During the rotation of the gears, heat is also generated. That is, after the vehicle has been running for a period of time, the lubricating oil 6 can obtain part of the heat generated during the rotation of the gears, and the demand for heating the lubricating oil 6 is less, and the temperature of the lubricating oil 6 is not the higher the better. Therefore, the flow of the motor coolant in the heat exchanger 3 can be adjusted by the electronic three-way valve and the uncooled branch 7, and the temperature of the lubricating oil 6 can be adjusted, thereby improving the stability and performance of the new energy commercial vehicle.

[0065] Preferably, the uncooled branch 7 is not immersed in the lubricating oil 6 at the bottom of the gear box 5.

[0066] Preferably, the three-way valve only allows the motor coolant to flow from the uncooled branch 7 to the cooler 4, and the motor coolant to flow from the heat exchanger 3 to the cooler 4. That is, two valves in the three-way valve are one-way valves, so that the motor coolant with a higher temperature cannot flow from the uncooled branch 7 to the heat exchanger 3.

[0067] Figure 3 Part of the structure of the gear box 5 oil temperature management system applied to the new energy commercial vehicle is shown in the embodiment of the present application, as shown in Figure 3 The copper tube type heat exchanger 3 is arranged at the bottom of the gear box 5.

[0068] Preferably, in certain cases, the system can also cool the lubricating oil 6. For example, in the case that the motor is running at a very low power and the motor cooling assembly 1 is running efficiently, the low-temperature coolant has a limited temperature rise when flowing through the motor cooling assembly 1, and the temperature after the temperature rise is still lower than the temperature of the lubricating oil 6, achieving the effect of cooling the lubricating oil.

[0069] The gear box 5 oil temperature management system applied to the new energy commercial vehicle provided in one or more embodiments of the present specification, based on the same inventive concept, the present specification also provides a new energy commercial vehicle.

[0070] Preferably, the new energy commercial vehicle comprises the gear box 5 oil temperature management system applied to the new energy commercial vehicle provided in any one of the above embodiments. It should be noted that all the actions of obtaining signals, information or data in the present application are carried out under the premise of complying with the corresponding data protection regulations and policies of the place, and with the authorization given by the owner of the corresponding device.

[0071] It should also be noted that the terms "comprise", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, product or equipment comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, product or equipment. Without more limitation, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, product or equipment comprising the element.

[0072] Each embodiment in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be referred to each other. Each embodiment focuses on the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0073] The above only describes the embodiments of the present specification and does not limit the present specification. The present specification can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present specification shall be included in the scope of the claims of the present application.

Claims

1. A gear box oil temperature management system applied to a new energy commercial vehicle, characterized in that, The motor cooling assembly, the circulating pump, the heat exchanger, the cooler and the gear box; The motor cooling assembly is connected with the circulating pump and can provide motor cooling liquid; the motor cooling liquid provided by the motor cooling assembly has a temperature greater than a first preset temperature; The circulating pump is further connected with the heat exchanger and can pump the motor cooling liquid to the heat exchanger; The heat exchanger is arranged at the bottom of the gear box, and at least part of the structure of the heat exchanger is immersed in lubricating oil at the bottom of the gear box; the heat exchanger can transfer the heat energy of the motor cooling liquid flowing in the heat exchanger to the lubricating oil to heat the lubricating oil; the heat exchanger is further connected with the cooler and can deliver the motor cooling liquid to the cooler.

2. The gear box oil temperature management system for new energy commercial vehicle according to claim 1, characterized in that, The motor is an oil-cooled motor; The motor cooling liquid is motor oil cooling liquid.

3. The gear box oil temperature management system for new energy commercial vehicle according to claim 1, characterized in that, The motor cooling assembly outputs the motor cooling liquid to an oil sump; the oil sump is a lower half of a crankcase and can store the motor cooling liquid; The circulating pump can deliver the motor cooling liquid stored in the oil sump to the heat exchanger.

4. The gear box oil temperature management system for new energy commercial vehicle according to claim 3, characterized in that, The circulating pump is connected with a control center of the new energy commercial vehicle; The unit flow rate of the circulating pump for transporting the motor cooling liquid is adjustable.

5. The gear box oil temperature management system for new energy commercial vehicle according to claim 1, characterized in that, The heat exchanger is a plate heat exchanger, a copper tube heat exchanger or a fin heat exchanger.

6. The gear box oil temperature management system for new energy commercial vehicle according to any one of claims 1-5, characterized in that, The gear box oil temperature management system applied to the new energy commercial vehicle further comprises an uncooled branch; An electronic three-way valve is arranged between the circulating pump and the heat exchanger, and the electronic three-way valve is connected with the circulating pump, the heat exchanger and the uncooled branch respectively; A three-way valve is arranged between the heat exchanger and the cooler, and the three-way valve is connected with the cooler, the heat exchanger and the uncooled branch respectively.

7. The gear box oil temperature management system for new energy commercial vehicle according to claim 6, characterized in that, The electronic three-way valve is connected with the control center of the new energy commercial vehicle; The electronic three-way valve can control the flow rate of the motor cooling liquid flowing to the heat exchanger and the uncooled branch.

8. The gear box oil temperature management system for new energy commercial vehicle according to claim 7, characterized in that, The uncooled branch is not immersed in the lubricating oil at the bottom of the gear box.

9. The gear box oil temperature management system for new energy commercial vehicle according to claim 6, characterized in that, The three-way valve only allows the motor cooling liquid to flow from the uncooled branch to the cooler and the motor cooling liquid to flow from the heat exchanger to the cooler.

10. A new energy commercial vehicle, characterized in that, The new energy commercial vehicle comprises the gear box oil temperature management system applied to the new energy commercial vehicle according to any one of claims 1-9.

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