Heat dissipation valve group and vehicle heat dissipation loop

Abstract

The utility model discloses a heat dissipation valve group and a vehicle heat dissipation loop, and relates to the technical field of railway vehicle heat dissipation loops, the heat dissipation valve group comprises a valve block, and the valve block is provided with a throttle valve, a first proportional overflow valve, a second proportional overflow valve, a first one-way valve and a second one-way valve; the valve block is provided with an interface a, an interface b, an interface c, an interface d, an interface e, an interface f and an interface g; an inlet of the throttle valve is respectively communicated with the interface e, the interface f and an outlet of the one-way valve I; an inlet of the first proportional overflow valve is communicated with an outlet of the throttling valve and a connector d. The interface c is respectively communicated with an inlet of the one-way valve I and an outlet of the proportional overflow valve I; an inlet of the second proportional overflow valve is communicated with the connector a, the connector g and an outlet of the second one-way valve. And the interface b is respectively communicated with an inlet of the one-way valve II and an outlet of the proportional overflow valve II.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation circuits for railway vehicles, in particular to a heat dissipation valve group and a vehicle heat dissipation circuit. Background Art

[0002] At present, most traditional hydraulic circuits use a heat dissipation cooling circuit composed of a fixed-flow pump and a fixed-flow motor. All the oil in this circuit flows into the motor to drive the cooling fan to run at the highest speed. When the hydraulic oil temperature is low and no heat dissipation is needed, the fan needs to stop running or reduce the speed to save power loss in the hydraulic system. However, the traditional hydraulic heat dissipation circuit supplies a fixed flow to the motor, causing the cooling fan to still run at the highest speed. The fan cannot be stopped or the speed cannot be reduced, causing the drive motor to continue to output power and dissipate heat for the low-temperature hydraulic oil, causing the hydraulic oil temperature to remain at a low temperature for a long time. If the oil pump works at a low oil temperature for a long time, it will cause a large oil suction resistance of the oil pump and damage the oil pump. In addition, the increased resistance of the oil flowing through the pipeline will also increase power loss. Utility Model Content

[0003] In view of the defects existing in the prior art, the purpose of the present utility model is to provide a heat dissipation valve group and a vehicle heat dissipation circuit, which can control the displacement change and / or pressure change of a variable pump in the heat dissipation circuit.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a heat dissipation valve group, including a valve block, the valve block is equipped with a throttle valve, a proportional relief valve 1, a proportional relief valve 2, a check valve 1 and a check valve 2; the valve block is provided with an interface a, an interface b, an interface c, an interface d, an interface e, an interface f, and an interface g; the inlet of the throttle valve is respectively connected with the interface e, the interface f, and the outlet of the check valve 1; the inlet of the proportional relief valve 1 is respectively connected with the outlet of the throttle valve and the interface d; the interface c is respectively connected with the inlet of the check valve 1 and the outlet of the proportional relief valve 1; the inlet of the proportional relief valve 2 is respectively connected with the interface a, the interface g, and the outlet of the check valve 2; the interface b is respectively connected with the inlet of the check valve 2 and the outlet of the proportional relief valve 2.

[0005] Further improvements are: the valve block is in the shape of a rectangular parallelepiped, and the front of the valve block is provided with interface a, interface d and interface e; the back of the valve block is provided with interface b, interface c, a throttle valve and a one-way valve 2; the top surface of the valve block is provided with proportional overflow valve 1 and proportional overflow valve 2; the left side of the valve block is provided with interface f, interface g and a one-way valve 1.

[0006] The utility model also provides a vehicle heat dissipation circuit, including a variable pump, a fixed-flow pump, a motor 1 and a motor 2; and also includes a heat dissipation valve group as mentioned above, wherein the outlet of the variable pump is respectively connected to the interface e of the heat dissipation valve group and the inlet of the motor 1; and the outlet of the fixed-flow pump is respectively connected to the interface a of the heat dissipation valve group and the inlet of the motor 2.

[0007] A further improvement is that the oil pump displacement variable port of the variable pump is connected to the interface d of the heat dissipation valve group.

[0008] A further improvement is that both the interface f and the interface g of the heat dissipation valve group are connected with pressure measuring joints.

[0009] A further improvement is that the interface b and the interface c of the heat dissipation valve group are respectively connected to the oil return tank.

[0010] A further improvement is that it also includes an oil suction filter, which is connected to the inlet of the variable pump and the inlet of the fixed pump respectively.

[0011] A further improvement is that it also includes an oil return filter, which is connected to the outlet of motor one and the outlet of motor two respectively.

[0012] A further improvement is that it also includes an air filter and a liquid level meter.

[0013] A further improvement is that both the motor one and the motor two are connected to a fan.

[0014] The beneficial effects of the utility model are:

[0015] 1. This device is used in the cooling system circuit, which is conducive to matching the controllable fan speed with the required cooling capacity. A high hydraulic oil temperature requires a fast fan speed, while a low hydraulic oil temperature requires a slow fan speed. When the hydraulic oil temperature is low, the control electrical signal transmitted to the proportional relief valves one and two through the temperature sensor is larger, and the set pressure setting value of the proportional relief valves one and two is smaller, so that the pump outlet pressure is smaller, then the fan motor driving torque is small, the fan runs at a lower speed, and the radiator capacity is reduced, so as to meet the requirements of matching the fan speed with the required cooling capacity. On the contrary, when the hydraulic oil temperature is high, the electrical signal controlled by the temperature sensor for the proportional relief valve is smaller, and the set pressure setting value of the proportional relief valve is larger, so as to increase the pump outlet pressure, then the fan motor driving torque is large, the fan runs at a faster speed, and the cooling capacity is increased, so as to meet the requirements of matching the fan speed with the required cooling capacity.

[0016] 2. In the utility model, the pressure setting value of the proportional relief valve is set in anti-phase control with the input control signal. When the control signal fails and there is no signal input, the proportional relief valve can still be guaranteed to have a maximum pressure setting value, ensuring that the fan can still run at the highest speed to dissipate heat, avoiding the overflow valve having no pressure when the signal fails when the oil temperature rises, resulting in the safety risk of failure to the hydraulic system after the oil temperature continues to rise.

[0017] 3. In the utility model, the one-way valve is arranged to help replenish the hydraulic oil to the heat dissipation motor. When the oil pump stops rotating and does not supply oil, the inertia of the fan blades delays the stopping of rotation, so that the heat dissipation motor is passively driven by the fan, and the motor continues to operate. When the oil pump stops rotating and does not supply oil, the motor lacks hydraulic oil for operation lubrication, causing wear and damage to the internal parts of the motor. When the heat dissipation motor continues to operate, a negative pressure vacuum appears on the oil outlet side of the one-way valve, and there is motor return oil pressure on the oil inlet side. There is a pressure difference on the inlet and outlet sides of the one-way valve. The one-way valve is opened and connected, and the hydraulic oil on the motor return oil side enters the motor oil inlet through the opened one-way valve, replenishing the hydraulic oil into the motor, ensuring that the internal parts of the motor are lubricated with hydraulic oil and can operate normally.

[0018] 4. In the utility model, the proportional relief valve, throttle valve, check valve and variable pump form an energy-saving speed control circuit. The faster the fan speed, the greater the motor input flow. Similarly, the larger the oil pump displacement is required. The d port on the valve group provides pressure, which is the set pressure of the proportional relief valve. The greater the pressure, the greater the control pressure of the variable pump, and the greater the output flow of the variable pump. The greater the pressure of the proportional relief valve, the greater the oil pump displacement and the greater the output flow, which meets the demand for large flow required by high pressure and fast motor speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the heat dissipation valve group in the embodiment of the utility model;

[0020] Figure 2 This is a front view of the heat dissipation valve group in the embodiment of the utility model;

[0021] Figure 3 This is a rear view of the heat dissipation valve assembly in the embodiment of the utility model;

[0022] Figure 4 A top view of the heat dissipation valve assembly in the embodiment of the utility model;

[0023] Figure 5 It is a left view of the heat dissipation valve group in the embodiment of the utility model;

[0024] Figure 6 It is a schematic diagram of a vehicle heat dissipation circuit in an embodiment of the utility model.

[0025] Reference numerals:

[0026] 1-valve block; 11-throttle valve; 12-proportional relief valve 1; 13-proportional relief valve 2; 14-check valve 1; 15-check valve 2; 2-variable pump; 3-fixed pump; 4-motor 1; 5-motor 2; 6-oil suction filter; 7-return oil filter; 8-pressure measuring joint; 9-air filter; 10-liquid level gauge. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0028] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0029] The following is a further description of the specific implementation of the utility model in conjunction with the drawings of the specification, so that the technical solution and its beneficial effects of the utility model are clearer and more explicit. The following description of the embodiments with reference to the drawings is exemplary and intended to explain the utility model, but cannot be understood as limiting the utility model.

[0030] See also Figure 1 As shown, an embodiment of the utility model provides a heat dissipation valve group, including a valve block 1, on which a throttle valve 11, a proportional relief valve 12, a proportional relief valve 2 13, a check valve 14 and a check valve 2 15 are installed; the valve block 1 is provided with an interface a, an interface b, an interface c, an interface d, an interface e, an interface f and an interface g; the inlet of the throttle valve 11 is respectively connected with the interface e, the interface f and the outlet of the check valve 14, and the inlet of the proportional relief valve 12 is respectively connected with the outlet of the throttle valve 11 and the interface d; the interface c is respectively connected with the inlet of the check valve 14 and the outlet of the proportional relief valve 12; the inlet of the proportional relief valve 2 13 is respectively connected with the interface a, the interface g and the outlet of the check valve 2 15; the interface b is respectively connected with the inlet of the check valve 2 15 and the outlet of the proportional relief valve 2 13.

[0031] See also Figures 2 to 5As shown, the valve block 1 is in a rectangular shape, and the front of the valve block 1 is provided with an interface a, an interface d and an interface e; the back of the valve block 1 is provided with an interface b, an interface c, a throttle valve 11 and a one-way valve 15; the top surface of the valve block 1 is provided with a proportional relief valve 12 and a proportional relief valve 2 13; the left side of the valve block 1 is provided with an interface f, an interface g and a one-way valve 14.

[0032] See also Figure 6 As shown, the utility model also provides a vehicle heat dissipation circuit, including a variable pump 2, a metering pump 3, a motor 1 4 and a motor 2 5; specifically, motor 1 4 and motor 2 5 are both connected to a fan. The vehicle heat dissipation circuit also includes a heat dissipation valve group as described above, the outlet of the variable pump 2 is respectively connected to the interface e of the heat dissipation valve group and the inlet of motor 1 4; the outlet of the metering pump 3 is respectively connected to the interface a of the heat dissipation valve group and the inlet of motor 2 5. Specifically, the oil pump displacement variable port of the variable pump 2 is connected to the interface d of the heat dissipation valve group, which is used to control the change of the oil pump displacement. The interface f and the interface g of the heat dissipation valve group are both connected to a pressure measuring joint 8. The interface b and the interface c of the heat dissipation valve group are respectively connected to the return oil tank.

[0033] Specifically, the vehicle heat dissipation circuit further includes an oil suction filter 6, which is respectively connected to the inlet of the variable pump 2 and the inlet of the fixed pump 3. The vehicle heat dissipation circuit further includes an oil return filter 7, which is respectively connected to the outlet of the motor 1 4 and the outlet of the motor 2 5. The vehicle heat dissipation circuit further includes an air filter 9 and a liquid level meter 10.

[0034] In the utility model, the valve block is installed above the vehicle frame, and proportional relief valve 1 and proportional relief valve 2 are installed directly above the valve block. The two proportional relief valves are used to control the driving pressure of the heat dissipation motor. A throttle valve is provided on the oil inlet channel 1 of the proportional relief valve 1 to control the flow rate flowing into the proportional relief valve 1, reduce the heat generated by the oil flowing through the relief valve, and avoid energy loss. A check valve 1 is installed in parallel on the oil inlet channel. The valve group is installed with proportional relief valve 2, which also controls the driving pressure of the heat dissipation motor, and a check valve 2 is also installed in parallel on the oil inlet channel. A pressure measuring joint is added to the oil inlet channels of the two proportional relief valves to detect the set pressure of the proportional relief valves.

[0035] The throttle valve is used to control the flow entering the proportional relief valve and can be adjusted manually.

[0036] The pressure of proportional relief valve 1 and proportional relief valve 2 can be proportionally adjusted by remote electrical signal. The set value of the relief valve decreases as the control signal increases.

[0037] One-way valve 1 and one-way valve 2 are one-way closed when the cooling motor works normally. When the cooling oil pump stops running, the one-way valve opens to replenish the oil at the return oil end to the cooling motor, keeping the inside of the cooling motor always in a lubricated state.

[0038] In the description of the specification, the description with reference to the terms "one embodiment", "preferably", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model, and the schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0039] Through the description of the above structure and principle, technicians in the relevant technical field should understand that the present invention is not limited to the above-mentioned specific implementation methods. Improvements and substitutions based on the present invention using the known technology in the field all fall within the protection scope of the present invention and should be defined by the claims.

Claims

1. A heat dissipation valve assembly, comprising a valve block (1), characterized in that: The valve block (1) is equipped with a throttle valve (11), a proportional relief valve 1 (12), a proportional relief valve 2 (13), a check valve 1 (14) and a check valve 2 (15); The valve block (1) is provided with an interface a, an interface b, an interface c, an interface d, an interface e, an interface f, and an interface g; The inlet of the throttle valve (11) is connected to the port e, the port f, and the outlet of the one-way valve (14) respectively. The inlet of the proportional relief valve 1 (12) is connected to the outlet of the throttle valve (11) and the interface d respectively; The interface c is respectively connected to the inlet of the one-way valve 1 (14) and the outlet of the proportional relief valve 1 (12); The inlet of the second proportional relief valve (13) is respectively connected to the interface a, the interface g, and the outlet of the second check valve (15); The interface b is respectively connected to the inlet of the second one-way valve (15) and the outlet of the second proportional relief valve (13).

2. The heat dissipation valve assembly according to claim 1, characterized in that: The valve block (1) is in the shape of a rectangular parallelepiped, and the front side of the valve block (1) is provided with an interface a, an interface d and an interface e; the back side of the valve block (1) is provided with an interface b, an interface c, a throttle valve (11) and a second check valve (15); the top side of the valve block (1) is provided with a proportional overflow valve 1 (12) and a second proportional overflow valve (13); the left side of the valve block (1) is provided with an interface f, an interface g and a first check valve (14).

3. A vehicle heat dissipation circuit, comprising a variable displacement pump (2), a fixed displacement pump (3), a motor 1 (4) and a motor 2 (5); characterized in that: It also includes a heat dissipation valve group as described in any one of claims 1 to 2, wherein the outlet of the variable pump (2) is respectively connected to the interface e of the heat dissipation valve group and the inlet of motor one (4); the outlet of the fixed pump (3) is respectively connected to the interface a of the heat dissipation valve group and the inlet of motor two (5).

4. The vehicle heat dissipation circuit according to claim 3, characterized in that: The oil pump displacement variable port of the variable pump (2) is connected to the interface d of the heat dissipation valve group.

5. The vehicle heat dissipation circuit according to claim 3, characterized in that: The interface f and the interface g of the heat dissipation valve group are both connected to a pressure measuring joint (8).

6. The vehicle heat dissipation circuit according to claim 3, characterized in that: The interface b and the interface c of the heat dissipation valve group are respectively connected to the oil return tank.

7. The vehicle heat dissipation circuit according to claim 3, characterized in that: It also includes an oil suction filter (6), which is connected to the inlet of the variable pump (2) and the inlet of the fixed pump (3) respectively.

8. The vehicle heat dissipation circuit according to claim 3, characterized in that: It also includes an oil return filter (7), and the oil return filter (7) is connected to the outlet of motor one (4) and the outlet of motor two (5) respectively.

9. The vehicle heat dissipation circuit according to claim 3, characterized in that: It also includes an air filter (9) and a liquid level meter (10).

10. The vehicle heat dissipation circuit according to claim 3, characterized in that: The motor 1 (4) and the motor 2 (5) are both connected to fans.

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