Efficient braking heat dissipation system and method and engineering vehicle

Abstract

The invention discloses an efficient brake heat dissipation system and method and an engineering vehicle in the technical field of engineering machinery, and aims to solve the problems that in the prior art, the arrangement of a radiator and the space arrangement of a whole vehicle need to be considered when a brake heat dissipation system is added, an additional power source needs to be added to the whole vehicle, energy consumption of the whole vehicle is increased, and cost is reduced. And the heat dissipation efficiency of the brake heat dissipation system is low. The system comprises a hydraulic oil module and a heat dissipation oil module, the hydraulic oil module comprises a valve bank, the input end of the valve bank is connected with a hydraulic pump, the input end of the hydraulic pump is connected with a hydraulic oil tank, and the first output end and the second output end of the valve bank are both connected with a fan motor. The third output end of the valve group is connected with the input end of the third heat dissipation core body and the output end of the driving motor at the same time; the hydraulic oil module and the heat dissipation oil module are integrated, flow distribution is conducted again, the working efficiency of a brake heat dissipation system is improved, a whole machine pipeline is simplified, and the whole machine space arrangement is optimized.

Description

Technical Field

[0001] The present invention relates to an efficient braking heat dissipation system, method and engineering vehicle, belonging to the technical field of construction machinery. Background Art

[0002] Large-tonnage construction machinery such as loaders need to perform frequent braking operations during work. In the vehicle's cyclic operation condition, the driving axle generates a huge amount of heat due to braking friction. Limited by the compact structure design of the wet driving axle and the brake being arranged inside the driving axle, it is difficult to dissipate the heat. In addition, the ventilation condition of the construction machinery operation environment is poor, which is not conducive to the natural heat dissipation of the driving axle. High temperature will accelerate the deterioration of the oil in the driving axle, reduce the lubrication performance of the oil, and high temperature will also reduce the braking performance of the wet brake, affecting the safe operation of the vehicle. In order to ensure the normal operation of the wet braking driving axle, improve its reliability and service life, it is necessary to add a braking heat dissipation system to control the temperature of the driving axle.

[0003] When adding a braking heat dissipation system to a construction vehicle with a compact structure, problems such as the layout of the radiator and the overall vehicle space layout need to be considered. And since the cooling oil fluid of the braking heat dissipation system has no power source, it is necessary to add an additional mechanical pump or electric pump to the whole machine as the power source of the braking heat dissipation system, resulting in problems such as increased energy consumption of the whole machine and low heat dissipation efficiency of the braking heat dissipation system. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide an efficient braking heat dissipation system, method and engineering vehicle, which integrate the hydraulic oil module and the heat dissipation oil module by using a valve group, reallocate the flow rate, improve the working efficiency of the braking heat dissipation system, simplify the pipeline of the whole machine, optimize the overall vehicle space layout, and provide a solution for problems such as difficult pipeline layout due to the compact internal structure space of the whole machine, large energy consumption and low efficiency of the braking heat dissipation system.

[0005] To solve the above technical problems, the present invention is implemented by the following technical solutions: In a first aspect, the present invention provides an efficient braking heat dissipation system, including a hydraulic oil module and a heat dissipation oil module. The hydraulic oil module includes a valve group. The input end of the valve group is connected to a hydraulic pump, the input end of the hydraulic pump is connected to a hydraulic oil tank, the first output end and the second output end of the valve group are both connected to a fan motor, the fan motor is used to drive the fan to rotate, the third output end of the valve group is simultaneously connected to the input end of a third heat dissipation core and the output end of a drive motor, the input end of the drive motor is connected to the fourth output end of the valve group, the output end of the third heat dissipation core is connected to the hydraulic oil tank, and a temperature control valve is provided between the input end and the output end of the third heat dissipation core; The hydraulic pump is drivingly connected to an engine, and the output end and the input end of the engine are both connected to a first heat dissipation core; The heat dissipation oil module is in transmission connection with the drive motor.

[0006] Further, the valve group includes a flow dividing valve. The input end of the flow dividing valve is connected to the input end of the valve group. The first output end of the flow dividing valve is simultaneously connected to the fourth output end of the valve group and the input end of the two-position two-way solenoid valve. The second output end of the flow dividing valve is simultaneously connected to the first end of the electromagnetic reversing valve and the input end of the one-way valve. The output end of the one-way valve and the output end of the two-position two-way solenoid valve are both connected to the third output end of the valve group. The second end of the electromagnetic reversing valve is connected to the first output end of the valve group. The third end of the electromagnetic reversing valve is connected to the second output end of the valve group. The fourth end of the electromagnetic reversing valve is connected to the third output end of the valve group. An electromagnetic overflow valve is connected between the third end of the valve group and the first end of the electromagnetic reversing valve.

[0007] Further, the heat dissipation oil module includes a heat dissipation oil pump, a rear drive axle, and a front drive axle. The heat dissipation oil pump is in transmission connection with the drive motor. The input end of the heat dissipation oil pump is connected to the heat dissipation oil tank. The output end of the heat dissipation oil pump is connected to one end of the filter. The other end of the filter is connected to the input end of the second heat dissipation core. The output end of the second heat dissipation core is connected to the input end of the flow dividing and pressure regulating valve group. The first output end of the flow dividing and pressure regulating valve group is connected to the input end of the front drive axle. The second output end of the flow dividing and pressure regulating valve group is connected to the input end of the rear drive axle. The output end of the front drive axle is simultaneously connected to the third output end of the flow dividing and pressure regulating valve group and the heat dissipation oil tank. The output end of the rear drive axle is simultaneously connected to the third output end of the flow dividing and pressure regulating valve group and the heat dissipation oil tank.

[0008] Further, the flow dividing and pressure regulating valve group includes an equal-ratio flow dividing valve. The output end of the equal-ratio flow dividing valve is connected to the input end of the flow dividing and pressure regulating valve group. The first output end of the equal-ratio flow dividing valve is simultaneously connected to the input end of the first pressure regulating one-way valve and the first output end of the flow dividing and pressure regulating valve group. The second output end of the equal-ratio flow dividing valve is simultaneously connected to the input end of the second pressure regulating one-way valve and the second output end of the flow dividing and pressure regulating valve group. The output ends of the first pressure regulating one-way valve and the second pressure regulating one-way valve are both connected to the third output end of the flow dividing and pressure regulating valve group.

[0009] Further, it further includes a control module, and the control module includes a controller and an electric control terminal. The electromagnetic overflow valve, the electromagnetic directional valve, and the two-position two-way solenoid valve are all electrically connected to the electric control terminal. A first temperature monitoring component is provided at the input end of the third heat dissipation core, a second temperature monitoring component is provided at the input end of the second heat dissipation core, a third temperature monitoring component is provided on the front drive axle, a fourth temperature monitoring component is provided on the rear drive axle, a fifth temperature monitoring component is provided at the output end of the engine, and the electric control terminal, the first temperature monitoring component, the second temperature monitoring component, the third temperature monitoring component, the fourth temperature monitoring component, and the fifth temperature monitoring component are all electrically connected to the controller.

[0010] In a second aspect, the present invention provides an efficient braking heat dissipation method, based on the efficient braking heat dissipation system described in the first aspect, including braking heat dissipation control and fan speed control; The braking heat dissipation control specifically includes: Obtain the temperatures of the first temperature monitoring component, the third temperature monitoring component, and the fourth temperature monitoring component; Take the maximum value between the temperatures of the third temperature monitoring component and the fourth temperature monitoring component as the maximum temperature value; Compare the maximum temperature value with the judgment temperature, and control the working state of the two-position two-way solenoid valve according to the comparison result; Compare the temperature of the first temperature monitoring component with the opening temperature of the third heat dissipation core, and control the working state of the temperature control valve according to the comparison result to achieve braking heat dissipation control.

[0011] Further, the controlling the working state of the two-position two-way solenoid valve according to the comparison result specifically includes: If the maximum temperature value is less than the judgment temperature, control the direct-through circuit of the two-position two-way solenoid valve to be connected; If the maximum temperature value is not less than the judgment temperature, control the one-way valve circuit of the two-position two-way solenoid valve to be connected; The controlling the working state of the temperature control valve according to the comparison result specifically includes: If the temperature of the first temperature monitoring component is less than the opening temperature of the third heat dissipation core, control the temperature control valve to open; If the temperature of the first temperature monitoring component is not less than the opening temperature of the third heat dissipation core, control the temperature control valve to close.

[0012] Further, the fan speed control specifically includes: Obtain the temperatures of the first temperature monitoring component, the second temperature monitoring component, the fifth temperature monitoring component, and the whole machine startup time; Compare the overall machine startup time with the preset startup time. If the overall machine startup time is not greater than the preset startup time, the reverse circuit of the electromagnetic directional valve is connected at this time; if the overall machine startup time is greater than the preset startup time, the forward circuit of the electromagnetic directional valve is connected at this time; After the forward circuit of the electromagnetic directional valve is connected: Compare the temperature of the second temperature monitoring component with the preset first maximum value and first minimum value at the same time, and calculate the first fan speed braking heat dissipation control ratio according to the comparison result; Compare the temperature of the fifth temperature monitoring component with the preset second maximum value and second minimum value at the same time, and calculate the second fan speed braking heat dissipation control ratio according to the comparison result; Compare the temperature of the first temperature monitoring component with the preset third maximum value and third minimum value at the same time, and calculate the third fan speed braking heat dissipation control ratio according to the comparison result; Take the maximum value among the first fan speed braking heat dissipation control ratio, the second fan speed braking heat dissipation control ratio and the third fan speed braking heat dissipation control ratio as the final fan speed braking heat dissipation control ratio, and control the electromagnetic relief valve through the electric control terminal to adjust the flow rate so that the fan motor rotates according to the final fan speed braking heat dissipation control ratio.

[0013] Further, the calculation of the first fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M3 < L1, then A1 = 10%; If L1 ≤ M3 < H1, A1 = (M3 - L1) / (H1 - L1); If M3 ≥ H1, then A1 = 1; Wherein, L1 is the first minimum value, H1 is the first maximum value, M3 is the temperature of the second temperature monitoring component, and A1 is the first fan speed braking heat dissipation control ratio; The calculation of the second fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M6 < L2, then A2 = 10%; If L2 ≤ M6 < H2, then A2 = (M6 - L2) / (H2 - L2); If M6 ≥ H2, then A2 = 1; Wherein, L2 is the second minimum value, H2 is the second maximum value, M6 is the temperature of the fifth temperature monitoring component, and A2 is the second fan speed braking heat dissipation control ratio; The calculation of the third fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M2 < L3, then A3 = 10%; If L3 ≤ M2 < H3, then A3 = (M2 - L3) / (H3 - L3); If M2 ≥ H3, then A3 = 1; Wherein, L3 is the third minimum value, H3 is the third maximum value, M2 is the temperature of the first temperature monitoring component, and A3 is the third fan speed braking heat dissipation control ratio.

[0014] In a third aspect, the present invention provides an engineering vehicle, including the high-efficiency braking heat dissipation system described in the first aspect.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention integrates the hydraulic oil module and the heat dissipation oil module by using a valve group, redistributes the flow rate, improves the working efficiency of the braking heat dissipation system, simplifies the pipeline of the whole machine, optimizes the layout of the vehicle space, and provides a solution for the problems such as difficult pipeline layout in the compact internal structure space of the whole machine, large energy consumption and low efficiency of the braking heat dissipation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a high-efficiency braking heat dissipation system according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a valve group according to an embodiment of the present invention; Figure 3 is a schematic flow chart of fan heat dissipation control according to an embodiment of the present invention; Figure 4 is a schematic flow chart of braking heat dissipation control according to an embodiment of the present invention.

[0017] In the figure: 1, hydraulic oil tank; 2, hydraulic power source; 201, engine; 202, hydraulic pump; 3, valve group; 301, flow dividing valve; 302, check valve; 303, electromagnetic relief valve; 304, electromagnetic directional valve; 305, two-position two-way solenoid valve; 4, fan motor; 5, fan; 6, radiator assembly; 601, first heat dissipation core; 602, second heat dissipation core; 603, third heat dissipation core; 604, temperature control valve; 7, flow dividing and pressure regulating valve group; 701, equal-ratio flow dividing valve; 702, first pressure regulating check valve; 703, second pressure regulating check valve; 8, controller; 9, pump-motor assembly; 901, drive motor; 902, heat dissipation oil pump; 10, heat dissipation oil tank; 11, filter; 12, rear drive axle; 13, front drive axle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be used to limit the protection scope of the present invention.

[0019] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations. Embodiment 1:

[0021] As Figure 1 shown, the present invention provides an efficient braking heat dissipation system, including a hydraulic oil module and a heat dissipation oil module. The hydraulic oil module includes a valve group 3. The input end of the valve group 3 is connected to a hydraulic pump 202. The input end of the hydraulic pump 202 is connected to a hydraulic oil tank 1. The first output end and the second output end of the valve group 3 are both connected to a fan motor 4. The fan motor 4 is used to drive a fan 5 to rotate. The third output end of the valve group 3 is simultaneously connected to the input end of a third heat dissipation core 603 and the output end of a drive motor 901. The input end of the drive motor 901 is connected to the fourth output end of the valve group 3. The output end of the third heat dissipation core 603 is connected to the hydraulic oil tank 1. A temperature control valve 604 is provided between the input end and the output end of the third heat dissipation core 603. The hydraulic pump 202 is drivingly connected to an engine 201. The output end and the input end of the engine 201 are both connected to a first heat dissipation core 601. The heat dissipation oil module is drivingly connected to the drive motor 901.

[0022] Specifically, the present invention includes a hydraulic power source 2, a radiator assembly 6, and a pump-motor assembly 9. The hydraulic power source 2 includes an engine 201 and a hydraulic pump 202. The radiator assembly 6 includes a first radiator core 601, a second radiator core 602, and a third radiator core 603. The pump-motor assembly 9 includes a drive motor 901 and a cooling oil pump 902. As Figure 1 and Figure 2 shown, P1 is the input end of the valve group 3, i.e., the hydraulic oil inlet; B1 is the first output end of the valve group 3, i.e., the hydraulic oil working outlet; K1 is the second output end of the valve group 3, i.e., the hydraulic oil inlet; T1 is the third output end of the valve group 3, i.e., the hydraulic oil drain port; B2 is the fourth output end of the valve group 3, i.e., the hydraulic oil working outlet; M1 is the electric control terminal; M2 is the first temperature monitoring component for monitoring the inlet temperature of the third radiator core 603; M3 is the second temperature monitoring component for monitoring the inlet temperature of the second radiator core 602; M4 is the third temperature monitoring component for detecting the braking temperature of the front drive axle 13; M5 is the fourth temperature monitoring component for monitoring the braking temperature of the rear drive axle 12; M6 is the fifth temperature monitoring component for monitoring the inlet temperature of the first radiator core 601, i.e., the coolant outlet temperature of the engine 201.

[0023] As Figure 2 shown, in an embodiment, the valve group 3 includes a flow dividing valve 301. The input end of the flow dividing valve 301 is connected to the input end of the valve group 3. The first output end of the flow dividing valve 301 is simultaneously connected to the fourth output end of the valve group 3 and the input end of a two-position two-way solenoid valve 305. The second output end of the flow dividing valve 301 is simultaneously connected to the first end of an electromagnetic directional valve 304 and the input end of a check valve 302. The output end of the check valve 302 and the output end of the two-position two-way solenoid valve 305 are both connected to the third output end of the valve group 3. The second end of the electromagnetic directional valve 304 is connected to the first output end of the valve group 3. The third end of the electromagnetic directional valve 304 is connected to the second output end of the valve group 3. The fourth end of the electromagnetic directional valve 304 is connected to the third output end of the valve group 3. An electromagnetic relief valve 303 is connected between the third end of the valve group 3 and the first end of the electromagnetic directional valve 304.

[0024] An embodiment further includes a control module, the control module includes a controller 8 and an electric control terminal, the electromagnetic overflow valve 303, the electromagnetic reversing valve 304 and the two-position two-way solenoid valve 305 are all electrically connected to the electric control terminal, a first temperature monitoring component is provided at the input end of the third heat dissipation core 603, a second temperature monitoring component is provided at the input end of the second heat dissipation core 602, a third temperature monitoring component is provided on the front drive axle 13, a fourth temperature monitoring component is provided on the rear drive axle 12, a fifth temperature monitoring component is provided at the output end of the engine 201, and the electric control terminal, the first temperature monitoring component, the second temperature monitoring component, the third temperature monitoring component, the fourth temperature monitoring component and the fifth temperature monitoring component are all electrically connected to the controller 8.

[0025] Specifically, during the startup phase of the engineering vehicle, the engine 201 ignites and operates. At this time, the controller 8 determines that the startup time of the whole machine is less than the set startup time. The controller 8 issues an action instruction to control the direct-through circuit of the two-position two-way solenoid valve 305 to be connected through the electric control terminal, the reverse circuit of the electromagnetic reversing valve 304 to be connected, and the electromagnetic overflow valve 303 to be closed. At this time, the working state of the hydraulic oil circulation route is as follows: the engine 201 operates, the hydraulic power source 2 is established, the hydraulic pump 202 pumps the hydraulic oil from the hydraulic oil tank 1 into the circuit. The hydraulic oil is branched by the flow dividing valve 301. One way flows into the inlet of the third heat dissipation core 603 through the direct-through circuit of the two-position two-way solenoid valve 305, and the other way enters the fan motor 4 reversely through the reverse circuit of the electromagnetic reversing valve 304. The one-way valve 302 is used to control the oil pressure entering the fan motor 4 not to exceed its allowable pressure. At this time, the fan motor 4 drives the fan 5 to rotate at full speed in reverse. The hydraulic oil is collected into the inlet of the third heat dissipation core 603 after passing through the fan motor 4. Since the whole machine has just started at this time and the hydraulic oil temperature is relatively low, the temperature control valve 604 is opened at this time, and the hydraulic oil directly returns to the hydraulic oil tank 1 through the branch of the temperature control valve 604. At this time, since the drive motor 901 in the pump motor assembly 9 is short-circuited and no oil passes through the pump motor assembly 9, the entire heat dissipation oil module is not started. At this time, the energy consumed by the entire hydraulic oil module is only the part for driving the fan to rotate in reverse, and the working efficiency of the braking heat dissipation system reaches the optimum.

[0026] Specifically, during the short-term working stage of the engineering vehicle, since frequent braking has not been performed, the value of the third temperature monitoring component M4 and the value of the fourth temperature monitoring component M5 have not reached the condition for opening the cooling oil module. At this time, the controller 8 determines the status of each monitoring value of the whole machine, and issues an action command to connect the direct circuit of the two-position two-way solenoid valve 305, connect the forward circuit of the solenoid reversing valve 304, and the solenoid overflow valve 303 determines the final A value according to the fan speed control logic, and adjusts the overflow ratio of the solenoid overflow valve 303, thereby controlling the speed of the fan 5; at this time, the working state of the hydraulic oil circulation circuit is as follows: the hydraulic pump 202 draws hydraulic oil from the hydraulic oil tank 1, and the hydraulic oil is diverted through the diverter valve 301, and one route flows into the third cooling core 603 through the direct circuit of the two-position two-way solenoid valve 305. The hydraulic oil flows into the inlet of the third heat dissipation core 603 after passing through the fan motor 4. The temperature control valve 604 needs to be closed based on the value of the first temperature monitoring component M2. The hydraulic oil returns to the hydraulic oil tank 1 through the temperature control valve 604 or the third heat dissipation core 603. At this time, the drive motor 901 in the pump motor assembly 9 is short-circuited, and no oil passes through the pump motor assembly 9, so that the entire heat dissipation oil module is not started. At this time, the heat generation of the whole machine is relatively low, and the hydraulic oil module can work in a relatively low energy consumption mode.

[0027] In one embodiment, the heat dissipation oil module includes a heat dissipation oil pump 902, a rear drive axle 12 and a front drive axle 13, the heat dissipation oil pump 902 is transmission-connected to the drive motor 901, the input end of the heat dissipation oil pump 902 is connected to the heat dissipation oil tank 10, the output end of the heat dissipation oil pump 902 is connected to one end of the filter 11, the other end of the filter 11 is connected to the input end of the second heat dissipation core 602, the output end of the second heat dissipation core 602 is connected to the input end of the diverter pressure regulating valve group 7, the first output end of the diverter pressure regulating valve group 7 is connected to the input end of the front drive axle 13, the second output end of the diverter pressure regulating valve group 7 is connected to the input end of the rear drive axle 12, the output end of the front drive axle 13 is simultaneously connected to the third output end of the diverter pressure regulating valve group 7 and the heat dissipation oil tank 10, and the output end of the rear drive axle 12 is simultaneously connected to the third output end of the diverter pressure regulating valve group 7 and the heat dissipation oil tank 10.

[0028] An embodiment, the flow dividing and pressure regulating valve group 7 includes an equal - proportion flow dividing valve 701. The output end of the equal - proportion flow dividing valve 701 is connected to the input end of the flow dividing and pressure regulating valve group 7. The first output end of the equal - proportion flow dividing valve 701 is simultaneously connected to the input end of the first pressure regulating check valve 702 and the first output end of the flow dividing and pressure regulating valve group 7. The second output end of the equal - proportion flow dividing valve 701 is simultaneously connected to the input end of the second pressure regulating check valve 703 and the second output end of the flow dividing and pressure regulating valve group 7. The output ends of the first pressure regulating check valve 702 and the second pressure regulating check valve 703 are both connected to the third output end of the flow dividing and pressure regulating valve group 7.

[0029] Specifically, during the long - term working stage of the engineering vehicle, after a period of loading work, due to the need for frequent commutation in the work cycle and the long - term intervention of the braking system, the temperatures of the front drive axle 13 and the rear drive axle 12 have reached the critical condition for the opening of the heat - dissipating oil module. The heat - dissipating oil module needs to be opened to dissipate heat from the brakes of the front drive axle 13 and the rear drive axle 12. At this time, the controller 8 judges the status of each monitoring value of the whole machine and issues an action instruction to connect the one - way valve circuit of the two - position two - way solenoid valve 305 and connect the forward rotation circuit of the electromagnetic directional valve 304. The electromagnetic relief valve 303 adjusts the relief ratio according to the size of the final fan speed braking heat - dissipation control ratio A. At this time, the working state of the hydraulic oil module is as follows: The hydraulic pump 202 extracts hydraulic oil from the hydraulic oil tank 1. The hydraulic oil is divided by the flow dividing valve 301. One way is to adjust the flow rate by the electromagnetic relief valve 303, and after adjusting the flow rate according to the final fan speed braking heat - dissipation control ratio A, it enters the fan motor 4 through the forward rotation circuit of the electromagnetic directional valve 304. The hydraulic oil enters the inlet of the third heat - dissipating core 603 after passing through the fan motor 4. The other way enters the drive motor 901 of the pump - motor assembly 9 to make the drive motor 901 work. The working pressure of the drive motor 901 is adjusted by the one - way valve in the two - position two - way solenoid valve 305 so that it does not exceed the allowable pressure of the drive motor 901. The hydraulic oil enters the inlet of the third heat - dissipating core 603 after passing through the drive motor 901. After the above two paths of oil flow merge into the inlet of the third heat - dissipating core 603, it is judged whether the temperature control valve 604 needs to be closed according to the value of the first temperature monitoring component M2. The hydraulic oil returns to the hydraulic oil tank 1 through the outlet of the third heat - dissipating core 603 or the temperature control valve 604.

[0030] At this time, the working state of the heat dissipation oil module is as follows: The heat dissipation oil pump 902 of the pump motor assembly 9 is driven by hydraulic oil to work, pumping the brake heat dissipation oil out of the heat dissipation oil tank 10, sending it to the filter 11 for filtration, and then entering the shunt pressure regulating valve group 7 after being cooled by the second heat dissipation core 602. After the cooled oil is shunted by the equal proportion shunt valve 701, it flows into the front drive axle 13 and the rear drive axle 12 in equal proportion. The inlet oil pressure of the front axle is regulated by the first pressure regulating check valve 702, and the inlet oil pressure of the rear axle is regulated by the second pressure regulating check valve 703 to prevent the seal from failing due to excessive inlet oil pressure resulting in excessive pressure in the wheel side brake chamber, causing drive axle failure. The oil in the front and rear axles undergoes sufficient heat exchange in the brake chamber and then converges back to the heat dissipation oil tank 10; Optionally, the heat dissipation oil tank 10 is made by welding stainless steel plates, with a certain heat exchange capacity to the outside, so as to effectively reduce the temperature of the oil flowing through the inlet of the second heat dissipation core 602, which can reduce the control ratio of the heat dissipation oil module part in the drive fan speed control logic, thereby increasing the efficiency of the entire heat dissipation system.

[0031] The present invention integrates the hydraulic oil module, the fan motor 4 and the heat dissipation oil module, and uses a single hydraulic oil circulation route to achieve the above three functions, simplifies the number of pipelines, effectively reduces costs, optimizes the layout space, and facilitates the overall machine layout; According to different working stages and the temperature monitoring components installed on the radiator assembly 6, the present invention can monitor the startup time of the whole machine and the inlet oil temperature of each core of the radiator assembly 6, and the valve group 3 is used to control the fan speed and the startup of the brake heat dissipation system, so as to reduce the energy waste of the whole machine, reduce the energy consumption of the whole machine, and improve the efficiency of the heat dissipation system.

[0032] The present invention uses the valve group 3 to integrate the hydraulic oil module and the heat dissipation oil module, redistributes the flow rate, improves the working efficiency of the brake heat dissipation system, simplifies the pipeline layout of the whole machine, optimizes the space layout of the whole vehicle, and provides a solution to problems such as difficult pipeline layout due to the compact internal structure space of the whole machine, large energy consumption and low efficiency of the brake heat dissipation system; At the same time, the present invention judges the working condition of the whole machine through each temperature monitoring data, dynamically adjusts the control logic of the brake heat dissipation system, saves energy consumption and improves the heat dissipation efficiency. Embodiment 2:

[0033] As Figure 3 and Figure 4 shown, the present invention provides an efficient brake heat dissipation method, based on the efficient brake heat dissipation system described in Embodiment 1, including brake heat dissipation control and fan speed control; The brake heat dissipation control specifically includes: Obtain the temperature of the first temperature monitoring component M2, the temperature of the third temperature monitoring component M4, and the temperature of the fourth temperature monitoring component M5; Take the maximum value between the temperature of the third temperature monitoring component M4 and the temperature of the fourth temperature monitoring component M5 as the maximum temperature value Z; Compare the maximum temperature value Z with the judgment temperature G1, and control the working state of the two-position two-way solenoid valve 305 according to the comparison result; Compare the temperature of the first temperature monitoring component M2 with the opening temperature G2 of the third heat dissipation core, and control the working state of the temperature control valve 604 according to the comparison result to achieve braking heat dissipation control.

[0034] An embodiment, the controlling the working state of the two-position two-way solenoid valve 305 according to the comparison result specifically includes: If the maximum temperature value Z is less than the judgment temperature G1, the temperature of the braking system has not reached the requirement for active heat dissipation, and no braking heat dissipation is required. At this time, the braking heat dissipation system does not need to be started, and the direct-through circuit of the two-position two-way solenoid valve 305 is controlled to be connected, and the braking heat dissipation system does not work; If the maximum temperature value Z is not less than the judgment temperature G1, the braking system generates more heat and active heat dissipation is required. Control the one-way valve circuit of the two-position two-way solenoid valve 305 to be connected to start the braking heat dissipation system; The controlling the working state of the temperature control valve 604 according to the comparison result specifically includes: If the temperature of the first temperature monitoring component M2 is less than the opening temperature G2 of the third heat dissipation core, the temperature of the hydraulic oil has not reached the requirement for active heat dissipation. At this time, the hydraulic oil does not need to pass through the third heat dissipation core 603, and the temperature control valve 604 is controlled to open, and the hydraulic oil directly returns to the hydraulic oil tank 1; If the temperature of the first temperature monitoring component M2 is not less than the opening temperature G2 of the third heat dissipation core, the hydraulic oil needs to be actively cooled, and the temperature control valve 604 is controlled to close, and the hydraulic oil passes through the third heat dissipation core 603 for cooling and then flows into the hydraulic oil tank 1.

[0035] As Figure 3 shown, the fan speed control specifically includes: Obtain the temperature M2 of the first temperature monitoring component, the temperature M3 of the second temperature monitoring component, the temperature of the fifth temperature monitoring component M6, and the whole machine startup time S; Compare the whole machine startup time S with the preset startup time S1. If the whole machine startup time S is not greater than the preset startup time S1, at this time, control the reverse circuit of the electromagnetic reversing valve 304 to be connected; if the whole machine startup time S is greater than the preset startup time S1, at this time, control the forward circuit of the electromagnetic reversing valve 304 to be connected; After the forward circuit of the electromagnetic reversing valve 304 is controlled to be connected: Compare the temperature of the second temperature monitoring component M3 with a preset first maximum value H1 and a first minimum value L1 simultaneously, and calculate a first fan speed braking heat dissipation control ratio A1 according to the comparison result; Compare the temperature of the fifth temperature monitoring component M6 with a preset second maximum value H2 and a second minimum value L2 simultaneously, and calculate a second fan speed braking heat dissipation control ratio A2 according to the comparison result; Compare the temperature of the first temperature monitoring component M2 with a preset third maximum value H3 and a third minimum value L3 simultaneously, and calculate a third fan speed braking heat dissipation control ratio A3 according to the comparison result; Take the maximum value among the first fan speed braking heat dissipation control ratio A1, the second fan speed braking heat dissipation control ratio A2, and the third fan speed braking heat dissipation control ratio A3 as the final fan speed braking heat dissipation control ratio A, and control the electromagnetic overflow valve 303 through the electric control terminal to adjust the flow rate so that the fan motor 4 rotates according to the final fan speed braking heat dissipation control ratio A.

[0036] An embodiment, the calculating the first fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M3 < L1, then A1 = 10%; If L1 ≤ M3 < H1, A1 = (M3 - L1) / (H1 - L1); If M3 ≥ H1, then A1 = 1; Wherein, L1 is the first minimum value, H1 is the first maximum value, M3 is the temperature of the second temperature monitoring component, and A1 is the first fan speed braking heat dissipation control ratio; The calculating the second fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M6 < L2, then A2 = 10%; If L2 ≤ M6 < H2, then A2 = (M6 - L2) / (H2 - L2); If M6 ≥ H2, then A2 = 1; Wherein, L2 is the second minimum value, H2 is the second maximum value, M6 is the temperature of the fifth temperature monitoring component, and A2 is the second fan speed braking heat dissipation control ratio; The calculating the third fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M2 < L3, then A3 = 10%; If L3 ≤ M2 < H3, then A3 = (M2 - L3) / (H3 - L3); If M2 ≥ H3, then A3 = 1; Wherein, L3 is the third minimum value, H3 is the third maximum value, M2 is the temperature of the first temperature monitoring component, and A3 is the third fan speed braking heat dissipation control ratio. Embodiment III:

[0037] The present invention provides an engineering vehicle, including the efficient braking and heat dissipation system described in Embodiment I.

[0038] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An efficient braking heat dissipation system, characterized in that, The invention comprises a hydraulic oil module and a heat dissipation oil module, wherein the hydraulic oil module comprises a valve group (3), the input end of the valve group (3) is connected to a hydraulic pump (202), the input end of the hydraulic pump (202) is connected to a hydraulic oil tank (1), the first output end and the second output end of the valve group (3) are both connected to a fan motor (4), the fan motor (4) is used to drive a fan (5) to rotate, the third output end of the valve group (3) is simultaneously connected to the input end of a third heat dissipation core (603) and the output end of a drive motor (901), the input end of the drive motor (901) is connected to the fourth output end of the valve group (3), the output end of the third heat dissipation core (603) is connected to the hydraulic oil tank (1), and a temperature control valve (604) is provided between the input end and the output end of the third heat dissipation core (603); The hydraulic pump (202) is drivingly connected to the engine (201), and the output end and the input end of the engine (201) are both connected to the first heat dissipation core (601); The heat dissipation oil module is transmission-connected to the drive motor (901).

2. The high-efficiency braking heat dissipation system according to claim 1, wherein The valve group (3) comprises a diverter valve (301), the input end of the diverter valve (301) is connected to the input end of the valve group (3), the first output end of the diverter valve (301) is simultaneously connected to the fourth output end of the valve group (3) and the input end of a two-position two-way solenoid valve (305), the second output end of the diverter valve (301) is simultaneously connected to the first end of the solenoid reversing valve (304) and the input end of the one-way valve (302), the output end of the one-way valve (302) is simultaneously connected to the fourth output end of the valve group (3) and the input end of a two-position two-way solenoid valve (305), The output ends of the valves (305) are connected to the third output end of the valve group (3), the second end of the electromagnetic reversing valve (304) is connected to the first output end of the valve group (3), the third end of the electromagnetic reversing valve (304) is connected to the second output end of the valve group (3), the fourth end of the electromagnetic reversing valve (304) is connected to the third output end of the valve group (3), and an electromagnetic overflow valve (303) is connected between the third end of the valve group (3) and the first end of the electromagnetic reversing valve (304).

3. The high-efficiency braking heat dissipation system according to claim 2, wherein The heat dissipation oil module comprises a heat dissipation oil pump (902), a rear drive axle (12) and a front drive axle (13); the heat dissipation oil pump (902) is drivingly connected to the drive motor (901); the input end of the heat dissipation oil pump (902) is connected to the heat dissipation oil tank (10); the output end of the heat dissipation oil pump (902) is connected to one end of a filter (11); the other end of the filter (11) is connected to the input end of a second heat dissipation core (602); the output end of the second heat dissipation core (602) is connected to a shunt pressure regulating valve The first output end of the diverter pressure regulating valve group (7) is connected to the input end of the front drive axle (13), the second output end of the diverter pressure regulating valve group (7) is connected to the input end of the rear drive axle (12), the output end of the front drive axle (13) is simultaneously connected to the third output end of the diverter pressure regulating valve group (7) and the heat dissipation oil tank (10), and the output end of the rear drive axle (12) is simultaneously connected to the third output end of the diverter pressure regulating valve group (7) and the heat dissipation oil tank (10).

4. The high-efficiency braking heat dissipation system according to claim 3, wherein The flow-dividing pressure-regulating valve group (7) comprises an equal-proportional flow-dividing valve (701), the output end of the equal-proportional flow-dividing valve (701) being connected to the input end of the flow-dividing pressure-regulating valve group (7), the first output end of the equal-proportional flow-dividing valve (701) being simultaneously connected to the input end of a first pressure-regulating check valve (702) and the first output end of the flow-dividing pressure-regulating valve group (7), the second output end of the equal-proportional flow-dividing valve (701) being simultaneously connected to the input end of a second pressure-regulating check valve (703) and the second output end of the flow-dividing pressure-regulating valve group (7), and the output end of the first pressure-regulating check valve (702) and the output end of the second pressure-regulating check valve (703) being both connected to the third output end of the flow-dividing pressure-regulating valve group (7).

5. The high-efficiency braking heat dissipation system according to claim 3, characterized in that, The invention also comprises a control module, the control module comprising a controller (8) and an electric control terminal, the electromagnetic overflow valve (303), the electromagnetic reversing valve (304) and the two-position two-way electromagnetic valve (305) are all electrically connected to the electric control terminal, a first temperature monitoring component is provided on the input end of the third heat dissipation core (603), a second temperature monitoring component is provided on the input end of the second heat dissipation core (602), a third temperature monitoring component is provided on the front drive axle (13), a fourth temperature monitoring component is provided on the rear drive axle (12), a fifth temperature monitoring component is provided on the output end of the engine (201), and the electric control terminal, the first temperature monitoring component, the second temperature monitoring component, the third temperature monitoring component, the fourth temperature monitoring component and the fifth temperature monitoring component are all electrically connected to the controller (8).

6. An efficient braking heat dissipation method, based on the efficient braking heat dissipation system described in claim 5, characterized in that, Including brake cooling control and fan speed control; The brake heat dissipation control specifically includes: Acquire the temperature of the first temperature monitoring component, the temperature of the third temperature monitoring component, and the temperature of the fourth temperature monitoring component; Taking the maximum value between the temperature of the third temperature monitoring component and the temperature of the fourth temperature monitoring component as the maximum temperature value; Compare the maximum temperature value with the judgment temperature, and control the working state of the two-position two-way solenoid valve (305) according to the comparison result; Compare the temperature of the first temperature monitoring component with the opening temperature of the third heat dissipation core, and control the working state of the temperature control valve (604) according to the comparison result to achieve brake heat dissipation control.

7. The efficient braking heat dissipation method according to claim 6, wherein The controlling the working state of the two-position two-way solenoid valve (305) according to the comparison result specifically includes: If the maximum temperature value is less than the judgment temperature, control the straight-through circuit of the two-position two-way solenoid valve (305) to be connected; If the maximum temperature value is not less than the judgment temperature, control the one-way valve circuit of the two-position two-way solenoid valve (305) to be connected; The controlling the working state of the temperature control valve (604) according to the comparison result specifically includes: If the temperature of the first temperature monitoring component is less than the opening temperature of the third heat dissipation core, control the temperature control valve (604) to open; If the temperature of the first temperature monitoring component is not less than the opening temperature of the third heat dissipation core, control the temperature control valve (604) to close.

8. The efficient braking heat dissipation method according to claim 6, characterized in that, The fan speed control specifically includes: Obtain the temperature of the first temperature monitoring component, the temperature of the second temperature monitoring component, the temperature of the fifth temperature monitoring component, and the whole machine startup time; Compare the whole machine startup time with the preset startup time. If the whole machine startup time is not greater than the preset startup time, control the reverse circuit of the electromagnetic directional valve (304) to be connected at this time; if the whole machine startup time is greater than the preset startup time, control the forward circuit of the electromagnetic directional valve (304) to be connected at this time; After controlling the forward circuit of the electromagnetic directional valve (304) to be connected: Compare the temperature of the second temperature monitoring component with the preset first maximum value and first minimum value at the same time, and calculate the first fan speed braking heat dissipation control ratio according to the comparison result; Compare the temperature of the fifth temperature monitoring component with the preset second maximum value and second minimum value at the same time, and calculate the second fan speed braking heat dissipation control ratio according to the comparison result; Compare the temperature of the first temperature monitoring component with the preset third maximum value and third minimum value at the same time, and calculate the third fan speed braking heat dissipation control ratio according to the comparison result; Take the maximum value among the first fan speed braking heat dissipation control ratio, the second fan speed braking heat dissipation control ratio, and the third fan speed braking heat dissipation control ratio as the final fan speed braking heat dissipation control ratio, and control the electromagnetic relief valve (303) through the electric control terminal to adjust the flow rate so that the fan motor (4) rotates according to the final fan speed braking heat dissipation control ratio.

9. The efficient braking heat dissipation method according to claim 8, wherein The calculating the first fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M3 < L1, then A1 = 10%; If L1 ≤ M3 < H1, A1 = (M3 - L1) / (H1 - L1); If M3 ≥ H1, then A1 = 1; Wherein, L1 is the first minimum value, H1 is the first maximum value, M3 is the temperature of the second temperature monitoring component, and A1 is the first fan speed braking heat dissipation control ratio; The calculating the second fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M6 < L2, then A2 = 10%; If L2 ≤ M6 < H2, then A2 = (M6 - L2) / (H2 - L2); If M6 ≥ H2, then A2 = 1; Wherein, L2 is the second minimum value, H2 is the second maximum value, M6 is the temperature of the fifth temperature monitoring component, and A2 is the second fan speed braking heat dissipation control ratio; Calculating the third fan speed braking heat dissipation control ratio according to the comparison result specifically includes: If M2 < L3, then A3 = 10%; If L3 ≤ M2 < H3, then A3 = (M2 - L3) / (H3 - L3); If M2 ≥ H3, then A3 = 1; Wherein, L3 is the third minimum value, H3 is the third maximum value, M2 is the temperature of the first temperature monitoring component, and A3 is the third fan speed braking heat dissipation control ratio.

10. An engineering vehicle, characterized in that, Including the high-efficiency braking heat dissipation system according to any one of claims 1 to 5.

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