Hydraulic system heat dissipation device with temperature control valve

Abstract

A hydraulic system radiating device with a temperature control valve comprises a radiator, an air cooling fan, a hydraulic motor and the temperature control valve, an oil inlet P2 of the temperature control valve is communicated with an oil return port D1 of the hydraulic motor, and a hot oil port B of the temperature control valve and an oil inlet P3 of the radiator are converged at a connection node D2. And a cold oil port A of the temperature control valve and an oil outlet of the cooler converge at a connecting node D3 and then flow through an oil outlet D4 of the radiator to return to the oil tank. When the temperature of the oil return port D1 of the hydraulic motor is smaller than the minimum threshold value, the left side of the temperature control valve is fully opened; when the temperature of the oil return port D1 is larger than the maximum threshold value, the right side of the temperature control valve is fully opened; and when the temperature of the oil return port D1 is not lower than the minimum threshold value and not higher than the maximum threshold value, the middle of the temperature control valve is conducted, and the position of a valve element of the temperature control valve is adjusted according to the temperature so as to control the flow of hydraulic oil flowing into the radiator and the oil tank. The service life of the radiator is effectively prolonged, and the radiating efficiency of a hydraulic system is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of railway maintenance machinery engineering, and particularly relates to a hydraulic system heat dissipation device with a temperature control valve. Background Technique

[0002] The hydraulic heat dissipation device is an important part of the hydraulic system components. In the field of construction machinery, the actions of actuators such as mechanisms are basically powered by the hydraulic system. The hydraulic system generates heat during operation. Since the hydraulic system has requirements for the temperature of the hydraulic oil, it is necessary to consider discharging the heat accumulated in the hydraulic system to reduce the temperature of the hydraulic oil.

[0003] At present, the radiators used in conventional running machinery are heat dissipation devices in which forced convection heat transfer and heat conduction play a major role. The heat dissipation process is generally that the heat of the high-temperature fluid in the radiator fluid pipe is transferred to the metal on the radiator surface through forced convection; then the heat on the metal surface is transferred to the outer surface through heat conduction; and then the heat is transferred to the air through the forced convection cold air. In the field of railway maintenance machinery, the existing radiators all have high-temperature oil entering a heat dissipation channel for heat dissipation, which will increase the working load of the radiator cooling device and reduce the service life of the radiator; and due to the uniqueness of the heat dissipation channel, the high-temperature oil return efficiency is low. Summary of the Invention

[0004] The purpose of the utility model is to solve the above-mentioned deficiencies of the existing technology, so as to provide a hydraulic system heat dissipation device with a temperature control valve, thereby effectively improving the service life of the radiator and the heat dissipation efficiency of the hydraulic system.

[0005] The technical solution of the utility model is as follows: A hydraulic system heat dissipation device with a temperature control valve, comprising:

[0006] A radiator, which is installed in an installation frame;

[0007] An air-cooled fan, which is arranged below the radiator and is used for heat exchange of cold and hot air for the radiator;

[0008] A hydraulic motor, which is used to drive the radiator to rotate;

[0009] And a temperature control valve, the oil inlet P2 of the temperature control valve is communicated with the oil return port D1 of the hydraulic motor, the hot oil port B of the temperature control valve and the radiator oil inlet P3 converge at the connection node D2, and the cold oil port A of the temperature control valve and the cooler oil outlet converge at the connection node D3 and then flow through the radiator oil outlet D4 back to the fuel tank.

[0010] When the temperature at the oil return port D1 of the hydraulic motor is less than the lowest threshold value, the left side of the temperature control valve is fully open;

[0011] When the temperature of the oil return port D1 is greater than the maximum threshold, the right side of the temperature control valve is fully opened;

[0012] When the temperature of the oil return port D1 is not lower than the minimum threshold and not higher than the maximum threshold, the middle of the temperature control valve is connected, and the position of the temperature control valve core is adjusted according to the temperature to control the flow of hydraulic oil flowing into the radiator and the oil tank.

[0013] A fan guard is arranged at the rear end of the radiator.

[0014] A fixing frame is arranged at the lower end of the installation frame, and a mounting plate for mounting a hydraulic motor is arranged on the fixing frame.

[0015] The fixing frame is two U-shaped brackets connected side by side at the front and rear ends of the installation frame, a side-by-side cross bar is arranged between the two U-shaped brackets, and the installation plate is arranged in the middle of the two cross bars.

[0016] The radiator and the mounting frame are provided with corresponding mounting holes around them, and are connected by bolts and nuts installed in the corresponding holes.

[0017] The installation frame is a rectangular frame structure consisting of a top crossbeam, a left beam, a right beam and a bottom beam.

[0018] The oil supply port P1 of the hydraulic motor is connected to the oil tank via a heat dissipation pump, and the oil drain port T1 of the hydraulic motor is connected to the oil drain port T2 of the oil tank via a hydraulic oil drain pipe.

[0019] A fluid rectifier is arranged around the fan guard to ensure that the cold air from the air-cooling fan enters the radiator.

[0020] The beneficial effects of the utility model are as follows: the utility model adopts a combination of a temperature control valve, a radiator and an air-cooling fan to achieve heat dissipation. The radiator device drives the air-cooling fan through a hydraulic motor. The high-speed cold air of the air-cooling fan passes through the surface of the radiator device to take away the high-temperature gas to achieve heat dissipation. The fan is closed all around, which can ensure that most of the fan cold air flows to the radiator to the greatest extent. The radiator is made of all-aluminum material, and its interior is divided into cold channel fins and hot channel fins, which can efficiently exchange heat to achieve the purpose of cooling. The temperature control valve in the heat dissipation device acts to divert the hydraulic oil flowing out of the hydraulic motor. The diversion method is to achieve the purpose of interception and diversion through the thermal expansion and contraction principle of the temperature-sensitive material inside the temperature control valve. When working in a low-temperature environment, when the hydraulic oil temperature in the hydraulic motor does not reach the opening temperature of the temperature control valve, the oil will all flow back to the oil tank, reducing the fluid flow through the radiator, thereby achieving the purpose of increasing the service life of the radiator, increasing the hydraulic oil reflux efficiency, and improving the hydraulic oil cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 This is the structural schematic diagram of the utility model;

[0023] Figure 2 This is the front view of the installation of the radiator device of the utility model;

[0024] Figure 3 This is the top view of the present utility model;

[0025] Figure 4 This is the right view of the radiator device of the utility model;

[0026] Figure 5 This is the hydraulic drive schematic diagram of the radiator device of the utility model;

[0027] Figure 6 This is the structural diagram of the temperature control valve. Specific embodiments

[0028] The following will describe the specific implementation of the present utility model in detail with reference to the accompanying drawings, so that the technical solutions and their beneficial effects of the present utility model are clearer and more accurate. The embodiments described in the present utility model with reference to the accompanying drawings are exemplary, aiming to explain the present utility model and should not be construed as limiting the present utility model. It will be described in three parts:

[0029] The first part is the structural composition.

[0030] As Figures 1 to 4 shown, a hydraulic cooling device for a temperature control valve includes a temperature control valve 5, a radiator 9, and a hydraulic motor 8; the installation frame 12 is a rectangular frame structure composed of a top cross beam, a left side beam, a right side beam, and a bottom beam. The four sides of the radiator 9 are all connected to the radiator installation frame 12 by bolts; a mounting fixing frame 14 is installed at the lower end of the installation frame 12 for mounting the mounting plate 10 of the hydraulic motor. The fixing frame 14 is two U-shaped brackets connected side by side at the front and rear ends of the installation frame 12. There are parallel cross bars between the two U-shaped brackets, and the mounting plate 10 is installed in the middle of the two cross bars. The hydraulic motor 8 is installed on this mounting plate 10 by bolts, and the hydraulic motor 8 is connected to the air-cooled fan 11. A fan guard 7 is provided at the rear end of the radiator 9, and the air-cooled fan 11 is surrounded by a fluid rectifier 15 around its circumference to ensure that the cold air of the air-cooled fan 11 all enters the radiator 9; the radiator 9 above the air-cooled fan 11 is of an aluminum plate fin type structure, and the upper part of the radiator 9 is a cooling chamber 13.

[0031] The second part is the pipeline connection method.

[0032] As Figure 1 and Figure 5As shown, the hydraulic motor 8 is of the vane type and is driven by the hydraulic oil output from the heat dissipation pump. The hydraulic motor has 3 oil ports, namely the oil supply port P1, the oil drain port T1, and the oil return port D1; the temperature control valve 5 is a three-position three-way proportional valve, and the temperature control valve has 3 oil ports, namely the oil inlet P2, the cold oil port A, and the hot oil port B; the hydraulic radiator 9 is an all-aluminum plate-fin structure radiator, and is provided with a radiator oil inlet P3 and a radiator oil outlet D4; the connection method is: two confluence nodes D2 and D3 are set in the pipeline connection; the oil supply port P1 of the above-mentioned hydraulic motor is connected to the fuel tank through the heat dissipation pump, the oil drain port T1 of the hydraulic motor is connected to the hydraulic oil drain pipe of the motor, the oil return port D1 of the hydraulic motor is connected to the motor oil return pipe and is connected to the oil inlet P2 of the temperature control valve, the cold oil port A of the temperature control valve is connected to the radiator oil return connection node D3, and the hot oil port B of the temperature control valve and the radiator oil inlet P3 converge at the connection node D2.

[0033] The third part, working principle analysis and description.

[0034] First, the parameters and working modes of the temperature control valve are described. Taking this utility model as an example:

[0035] Parameters: The opening temperature range of the temperature control valve is 48°C to 62°C, fully open when exceeding 62°C, the maximum flow rate is 227 L / min, the maximum working temperature is 113°C, and the minimum working temperature is -34°C.

[0036] As Figure 5 、 Figure 6 shown, its working modes are divided into 3 types:

[0037] Mode 1: When the temperature of the hydraulic oil is lower than the starting temperature of the temperature-sensitive material in the valve body, which is 48°C, the left side of the temperature control valve 5 is fully open, and the oil inlet P2 is communicated with the cold oil port A. At this time, all the hydraulic oil flows to the hydraulic oil tank;

[0038] Mode 2: When the temperature of the hydraulic oil is between the starting temperature of the temperature-sensitive material, which is 48°C, and the fully open temperature, which is 62°C, the middle part of the temperature control valve 5 is conducted, the oil inlet P2 is communicated with both the cold oil port A and the hot oil port B, and the position of the valve core of the temperature control valve 5 is adjusted according to the temperature, so that part of the hydraulic oil flows to the radiator and the other part flows to the hydraulic oil tank;

[0039] Mode 3: When the temperature of the hydraulic oil exceeds 62°C, the right side of the temperature control valve 5 is fully open, the oil inlet P2 is communicated with the hot oil port B, and all the hydraulic oil flows to the radiator.

[0040] As Figure 5 、 Figure 6As shown, the utility model is driven by a heat dissipation pump, and the heat dissipation pumps are all fixed-displacement pumps. The hydraulic oil of the heat dissipation pump enters the hydraulic motor to drive the cooling fan to rotate, and the hydraulic oil at the oil return port of the hydraulic motor is connected to the oil inlet of the temperature control valve; the temperature control valve 5 is a three-position three-way proportional valve and is provided with a bypass overflow valve 16. The function of its bypass overflow valve is that when the spool of the temperature control valve is stuck, when the oil return pressure reaches 172 PSI, the bypass overflow valve opens to protect the system from damage due to excessive pressure. When the oil return temperature of the hydraulic motor does not reach the temperature change starting temperature of 48 °C of the temperature control valve, the oil return oil flows back to the fuel tank through the bypass overflow valve; when the oil return temperature of the hydraulic motor is between the starting temperature of 48 °C and the fully open temperature of 62 °C, a part of the high-temperature hydraulic oil enters the radiator, and the other part flows back to the hydraulic fuel tank; when the oil return temperature of the hydraulic motor exceeds the fully open temperature of 62 °C, all the high-temperature hydraulic oil flows to the radiator for heat dissipation; the radiator is provided with an oil inlet and an oil return port for the mechanism hydraulic oil, and all this part of the hydraulic oil enters the radiator for heat dissipation.

[0041] The utility model is not limited to the above embodiments. For those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as within the protection scope of the present utility model. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

Claims

1. A hydraulic system heat dissipation device with a temperature control valve, characterized in that: Comprising: A radiator (9), which is installed within an installation frame (12); An air-cooled fan (11), which is disposed below the radiator (9) and is used for performing hot and cold air exchange on the radiator (9); A hydraulic motor (8), which is used to drive the radiator (9) to rotate; And a temperature control valve (5), an oil inlet P2 of the temperature control valve (5) is communicated with an oil return port D1 of the hydraulic motor (8), a hot oil port B of the temperature control valve (5) and an oil inlet P3 of the radiator (9) converge at a connection node D2, a cold oil port A of the temperature control valve (5) and an oil outlet of the cooler converge at a connection node D3 and then flow through an oil outlet D4 of the radiator and return to the fuel tank.

2. The heat dissipation device for a hydraulic system with a temperature control valve according to claim 1, characterized in that: When the temperature of the oil return port D1 of the hydraulic motor (8) is less than the lowest threshold value, the left side of the temperature control valve (5) is fully open; When the temperature of the oil return port D1 is greater than the maximum threshold value, the right side of the temperature control valve (5) is fully open; When the temperature of the oil return port D1 is not lower than the lowest threshold value and not higher than the maximum threshold value, the middle part of the temperature control valve (5) is conducted, and the position of the valve core of the temperature control valve (5) is adjusted according to the temperature to control the flow rates of the hydraulic oil flowing into the radiator (9) and the fuel tank.

3. The heat dissipation device for a hydraulic system with a temperature control valve according to claim 1, characterized in that: A fan guard (7) is provided at the rear end of the radiator (9).

4. A hydraulic system heat dissipation device with a temperature control valve according to claim 1, characterized in that: A fixing bracket (14) is installed at the lower end of the installation frame (12), and a mounting plate (10) for installing the hydraulic motor (8) is installed on the fixing bracket (14).

5. The heat dissipation device of a hydraulic system with a temperature control valve according to claim 1, characterized in that: The fixing bracket (14) is two U-shaped brackets connected side by side at the front and rear ends of the installation frame (12), a cross bar is provided side by side between the two U-shaped brackets, and the mounting plate (10) is installed in the middle of the two cross bars.

6. The heat dissipation device for a hydraulic system with a temperature control valve according to claim 1, characterized in that: Corresponding mounting holes are provided around the radiator (9) and the installation frame (12), and they are connected by bolts and nuts installed in the corresponding holes.

7. A hydraulic system heat dissipation device with a temperature control valve according to claim 1 or 6, characterized in that: The installation frame (12) is a rectangular frame structure composed of a top cross beam, a left side beam, a right side beam and a bottom beam.

8. The hydraulic system heat dissipation device with a temperature control valve according to claim 1, characterized in that: An oil supply port P1 of the hydraulic motor (8) is communicated with the fuel tank through a heat dissipation pump, and an oil drain port T1 of the hydraulic motor (8) is communicated with an oil drain port T2 of the fuel tank through a hydraulic oil drain pipe.

9. The heat dissipation device for a hydraulic system with a temperature control valve according to claim 1, characterized in that: A fluid rectifier (15) is provided around the fan guard (7) to ensure that the cold air of the air-cooled fan (11) all enters the radiator (9).

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