Hydraulic control system

Abstract

The utility model discloses a hydraulic control system which comprises an oil tank, an energy accumulator, a constant pressure variable pump, a vane pump and a cooler, two electric heaters inserted into the oil tank are installed on the side face of the oil tank, and a double-cylinder oil return filter, an oil drainage port and a collecting pipe which are communicated with the oil tank are installed on the oil tank. The energy accumulator is installed on the side face of the oil tank and communicated with the oil tank, the energy accumulator is further connected with a transfer part, the transfer part is communicated with the collecting pipe and the double-cylinder oil return filter, the constant-pressure variable pump is communicated with the collecting pipe and further communicated with the oil tank, and the two vane pumps are sequentially communicated and then communicated with the oil tank. The temperature of hydraulic oil is automatically adjusted, friction and abrasion of a hydraulic system are reduced, the working stability of the hydraulic system is improved, the overhaul period is prolonged, pressure supplementation is conducted on the oil tank through the energy accumulator, and the pressure stability of the hydraulic system can be improved in combination with the constant-pressure variable pump.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic devices, and specifically relates to a hydraulic control system. Background Art

[0002] At present, a hydraulic test station is often used in the test of hydraulic actuators. The tests of hydraulic actuators include action tests, pressure tests, pressure holding tests, flushing, etc. Different tests require a variety of hydraulic test stations, and the multi-functional design of the hydraulic test station directly affects the test efficiency and test cost of related hydraulic actuators.

[0003] In related technologies, the oil temperature of a commonly used hydraulic system will change. The hydraulic system rarely automatically adjusts according to the oil temperature in the fuel tank, and the internal temperature gradient of the hydraulic oil is relatively large, which is not conducive to the high-precision automation of the hydraulic system. Secondly, the hydraulic system rarely performs operations such as oil stringing and cleaning, and the filtering effect of the hydraulic system on the hydraulic oil is not good. Coupled with the fact that most hydraulic systems are repaired until a failure occurs, the hydraulic system is more likely to fail. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a hydraulic control system to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A hydraulic control system includes a base, on which a fuel tank is installed. A double-barrel return oil filter, an oil drain port, and a manifold are installed on the fuel tank and are communicated with the fuel tank. The double-barrel return oil filter filters out solid impurities in the hydraulic system, such as mechanical impurities and metal powders generated by wear, keeps the oil clean, and reduces friction and wear of the hydraulic system. The oil drain port can discharge the hydraulic oil in the fuel tank;

[0006] An accumulator is installed on the side of the fuel tank and is communicated with the fuel tank. The accumulator is also connected with a transfer part, and the transfer part is communicated with the manifold and the double-barrel return oil filter. The accumulator can stabilize the pressure of the hydraulic system, ensure that the hydraulic system operates within a set pressure range, and timely supplement leaks to maintain the normal operation of the hydraulic system;

[0007] A constant pressure variable pump is installed on the base and is communicated with the manifold. The constant pressure variable pump is also communicated with the fuel tank. Regardless of how the load or demand changes, the constant pressure variable pump can automatically adjust the flow rate of the hydraulic oil to ensure that the pressure of the hydraulic system remains constant;

[0008] Vane pumps are installed on the base. Two vane pumps are provided and are communicated in sequence and then communicated with the fuel tank. The vane pumps provide hydraulic energy with a certain flow rate and pressure;

[0009] Cooler, the cooler is installed on the base, the cooler is communicated with the fuel tank, two electric heaters inserted into the interior of the fuel tank are installed on the side of the fuel tank, and the electric heaters are mainly used to increase and maintain the temperature of the oil in the hydraulic system. In a low-temperature environment, the viscosity of the oil increases, which is not conducive to the oil absorption and startup of the hydraulic pump. The electric heaters convert electrical energy into heat energy to heat the oil and reduce its viscosity, ensuring the normal startup and operation of the hydraulic system. The cooler is mainly used to reduce the temperature of the oil in the hydraulic system. A large amount of heat is generated when the hydraulic system is working. If the temperature is too high, it will cause the performance of the equipment to decline, even shut down or reduce the service life of the equipment. The cooler controls the oil temperature within the normal range by increasing the heat dissipation area and enhancing the heat transfer effect of the oil, ensuring the stable operation of the hydraulic system.

[0010] Furthermore, a liquid level and liquid temperature sensor is installed on the upper surface of the fuel tank to provide temperature parameters for the cooler and the electric heaters. Liquid level and liquid temperature gauges are installed on the upper and lower parts of the side of the fuel tank, facilitating the intuitive viewing of the temperature and liquid level of the hydraulic oil.

[0011] Furthermore, a single-tube circulating filter is installed at the connection between the cooler and the fuel tank, which is an important part of the fine filtration of the return oil in the hydraulic system. The single-tube circulating filter can effectively filter out metal powders generated by the wear of various components in the hydraulic system and rubber impurities of the seals, etc.

[0012] Furthermore, a pressure oil filter and two pressure measuring joints are provided on the side of the transfer part. The hydraulic oil filter can effectively prevent impurities from clogging the small gaps and throttle holes of the transfer part, reducing the wear and scratches of the transfer part.

[0013] Furthermore, an electromagnetic overflow valve and a pressure sensor are installed on the upper surface of the transfer part. When the pressure of the hydraulic system is too high, the electromagnetic overflow valve opens for pressure relief to prevent overpressure and protect the pipeline.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] (1) The liquid level and liquid temperature sensor detects the temperature of the hydraulic oil, and the electric heaters and the cooler automatically adjust the temperature of the hydraulic oil based on the temperature of the hydraulic oil. The two electric heaters increase the temperature of the hydraulic oil, improving the heating speed and shortening the response time of the hydraulic system.

[0016] (2) When the hydraulic system is operating, the double-tube return oil filter filters mechanical impurities, metal powders generated by wear, etc., keeping the oil clean, reducing the friction and wear of the hydraulic system. Then, the hydraulic oil is filtered again by the single-tube circulating filter, with high filtering accuracy for the hydraulic oil, improving the working stability of the hydraulic system and extending the maintenance cycle.

[0017] (3) The accumulator is used to supplement the pressure of the fuel tank. Combining with a constant-pressure variable pump can improve the pressure stability of the hydraulic system, prevent pressure fluctuation problems, and provide a more stable pressure for hydraulic equipment. Brief Description of the Drawings

[0018] Figure 1 is a perspective view of the present utility model;

[0019] Figure 2 For the present utility model Figure 1 is a front view;

[0020] Figure 3 For the present utility model Figure 1 is a top view;

[0021] Figure 4 is a schematic diagram of the hydraulic control system of the present utility model.

[0022] In the figure: 1, fuel tank; 2, electric heater; 5, liquid level and temperature sensor; 8, double-barrel return oil filter; 9, pressure measuring joint; 11, vane pump; 14, pressure gauge; 19, single-barrel circulation filter; 20, cooler; 21, first butterfly valve; 29, constant-pressure variable pump; 30, pressure oil filter; 31, electromagnetic overflow valve; 33, pressure sensor; 36, accumulator; 41, liquid level and thermometer; 42, transfer part; 43, base; 44, manifold; 45, drain port. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment:

[0025] Please refer to Figures 1-4 , the present utility model provides a technical solution: a hydraulic control system, including a base 43, on which a fuel tank 1 is installed. The capacity of the fuel tank 1 is 1600L. A double-barrel return oil filter 8, a drain port 45, and a manifold 44 communicating with the fuel tank 1 are installed on the fuel tank 1. The drain port 45 is located on the side of the double-barrel return oil filter 8. The drain port 45 can discharge hydraulic oil, and the double-barrel return oil filter 8 filters the hydraulic oil to reduce the content of particulate impurities in the hydraulic oil;

[0026] Accumulator 36, which is installed on the side of the oil tank 1 and communicates with the oil tank 1. The accumulator 36 is also connected to a transfer part 42, and the transfer part 42 communicates with the manifold 44 and the double-barrel oil return filter 8. The accumulator 36 is precharged with nitrogen at 12 MPa to supplement pressure to the oil tank 1;

[0027] Constant pressure variable pump 29, which is installed on the base 43 and communicates with the manifold 44. The constant pressure variable pump 29 also communicates with the oil tank 1. The constant pressure variable pump 29 and the oil tank 1 are connected by two pipes. As Figure 1 shown, the lower one is a thick pipe and is provided with a ball valve, and the upper one is a thin pipe that directly communicates with the oil tank 1;

[0028] Vane pump 11, which is installed on the base 43. There are two vane pumps 11, which are connected in series and then communicate with the oil tank 1. Both the vane pump 11 and the constant pressure variable pump 29 are equipped with shock absorbers to effectively reduce the vibration transmitted to the hydraulic system or other equipment;

[0029] Cooler 20, which is installed on the base 43. The cooler 20 communicates with the oil tank 1. Two electric heaters 2 inserted into the interior of the oil tank 1 are installed on the side of the oil tank 1. The cooler 20 and the electric heaters 2 control the oil temperature to keep the hydraulic oil temperature within a reasonable range and ensure the stable operation of the hydraulic system.

[0030] In this embodiment, as Figure 4 shown, it is the schematic diagram of the pressure control system, Figure 4 and the serial number descriptions in

[0031] Table 1;

[0032]

[0033]

[0034] In this embodiment, the wiring of the hydraulic control system is shown in Table 2;

[0035] Table 2, Hydraulic Control System Wiring Table

[0036]

[0037]

[0038] Note: In the figure, "11" represents +24V and "00" represents 0V. The main electrical parameters of the hydraulic control system are as follows: Servo motor: SM25550F15DR, power AC380V, 86.42kw, two units (one unit works continuously); Circulation motor power: AC380V / 50Hz, 2.2kw - 1450r / min, one unit (one unit works continuously); Heater power: AC220V / 50Hz, 2kw, two units; The control voltage of the electromagnetic directional valve is: DC24V.

[0039] In this embodiment, as Figure 1 shown, a liquid level and liquid temperature sensor 5 is installed on the upper surface of the fuel tank 1, and liquid level and liquid temperature gauges 41 are installed on both the upper and lower parts of the side of the fuel tank 1. The liquid level and liquid temperature sensor 5 provides data for the operation of the electric heater 2 and the cooler 20 by taking the detected temperature as an electrical signal, realizing automatic temperature control of the hydraulic oil. At low temperatures, the two electric heaters 2 quickly heat the hydraulic oil to ensure good fluidity of the hydraulic oil; when the temperature of the hydraulic oil is too high, the high temperature makes the hydraulic oil thinner, the oil film thinner and easier to damage, the lubrication performance deteriorates, and the wear of hydraulic components increases, which may cause damage to important hydraulic components such as hydraulic pumps, valves, and locks. At this time, the cooler 20 can timely reduce the temperature of the hydraulic oil to ensure the stable operation of the hydraulic system.

[0040] In this embodiment, as Figure 1 and Figure 3 shown, several first butterfly valves 21 are installed on the pipeline of the cooler 20. After the external pipeline is connected to the first butterfly valve 21, the opening and closing of the pipeline can be controlled through the first butterfly valve 21, which is convenient for the maintenance and detection of the cooler 20.

[0041] In this embodiment, as Figure 1 shown, a single - tube circulation filter 19 is installed at the connection between the cooler 20 and the fuel tank 1, which is beneficial to the recycling of the oil in the hydraulic system, improves the reliability and service life of the hydraulic system, and can also ensure the long - term stable operation of the hydraulic system.

[0042] In this embodiment, as Figure 3 shown, a pressure oil filter 30 and two pressure gauges 9 are provided on the side of the transfer part 42. When the hydraulic oil flows through the transfer part 42, the pressure oil filter 30 filters the hydraulic oil to prevent wear of the transfer part 42 and the pipeline connected to the transfer part 42, and the pressure gauges 9 can detect the pressure of the hydraulic oil.

[0043] In this embodiment, as Figure 1 and Figure 2 shown, two pressure gauges 14 are installed on the upper surface of the fuel tank 1, and the pressure gauges 14 are equipped with signal lines, which is convenient for wiring the pressure gauges 14 and can collect the data of the hydraulic system into the electric cabinet.

[0044] In this embodiment, as Figure 2 shown, an electromagnetic relief valve 31 and a pressure sensor 33 are installed on the upper surface of the transfer part 42. The electromagnetic relief valve 31 determines whether to relieve the pressure of the hydraulic oil based on the detection result of the pressure sensor 33.

[0045] Specifically, during use, the liquid level and temperature sensor 5 detects the temperature of the hydraulic oil. If the temperature of the hydraulic oil is low, the hydraulic oil is heated by two electric heaters 2. The temperature of the hydraulic oil can also be directly observed by combining the liquid level and temperature gauge 41 to achieve double detection of the hydraulic oil. After the temperature of the hydraulic oil reaches the standard, the constant pressure variable pump 29 and the vane pump 11 are started to deliver the hydraulic oil to the corresponding hydraulic equipment. During use, if the liquid level and temperature sensor 5 detects that the temperature of the hydraulic oil is too high, the temperature of the hydraulic oil can be reduced by the cooler 20. At the same time, the accumulator 36 supplements the pressure of the fuel tank 1 to ensure sufficient pressure of the hydraulic oil. During the flow of the hydraulic oil, the double-barrel return oil filter 8, the pressure oil filter 30, and the single-barrel circulation filter 19 perform multiple filtrations, filtering impurities in different pipelines, reducing the wear of the hydraulic system, and making the stability and service life of the hydraulic system better during use.

[0046] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic control system, characterized in that: include: A base (43), an oil tank (1) is mounted on the base (43), two electric heaters (2) are mounted on the side of the oil tank (1) and are inserted into the oil tank (1), and a double-tube oil return filter (8) connected to the oil tank (1), an oil drain port (45), and a manifold (44) are mounted on the oil tank (1); An accumulator (36), the accumulator (36) being mounted on a side of the oil tank (1) and being in communication with the oil tank (1), and the accumulator (36) being further connected to a transfer member (42), the transfer member (42) being in communication with a manifold (44) and a double-tube oil return filter (8); A constant pressure variable displacement pump (29), the constant pressure variable displacement pump (29) being mounted on a base (43) and being in communication with a manifold (44), the constant pressure variable displacement pump (29) also being in communication with an oil tank (1); A vane pump (11), the vane pump (11) is mounted on the base (43), two vane pumps (11) are provided and are connected in sequence and then connected to the oil tank (1); A cooler (20), wherein the cooler (20) is mounted on a base (43), and the cooler (20) is connected to the oil tank (1).

2. A hydraulic control system according to claim 1, characterized in that: A liquid level and liquid temperature sensor (5) is installed on the upper surface of the oil tank (1), and liquid level and liquid temperature meters (41) are installed on the upper and lower parts of the side of the oil tank (1).

3. A hydraulic control system according to claim 1, characterized in that: The pipeline of the cooler (20) is equipped with a plurality of first butterfly valves (21).

4. A hydraulic control system according to claim 1, characterized in that: A single-cylinder circulation filter (19) is installed at the connection between the cooler (20) and the oil tank (1).

5. A hydraulic control system according to claim 1, characterized in that: An oil pressure filter (30) and two pressure measuring joints (9) are provided on the side of the transfer member (42).

6. A hydraulic control system according to claim 1, characterized in that: Two pressure gauges (14) are installed on the upper surface of the oil tank (1), and the pressure gauges (14) are provided with signal lines.

7. A hydraulic control system according to claim 1, characterized in that: An electromagnetic overflow valve (31) and a pressure sensor (33) are installed on the upper surface of the transfer member (42).

Images