An oil injection device and method for a hydraulic system

Abstract

The present invention relates to the field of marine equipment, and particularly to an oil injection device and method capable of purifying oil and performing precise oil injection. A hydraulic system oil injection device includes an outer oil tank in which oil is stored; it also includes a hydraulic system, a heating system, a dehumidification system, a cooling system, and a degassing system; the outer oil tank is connected to the heating system through a first one-way valve, the heating system is connected to the dehumidification system through a filter, the dehumidification system is connected to the degassing system, the degassing system is connected to a filter oil pump, and after passing through a second one-way valve, the filter oil pump forms three branches. The first branch is connected to the heating system through an electromagnetic valve; the second branch is connected to a cooling system, and the cooling system is connected to a first oil discharge member; the third branch is directly connected to the first oil discharge member; the first oil discharge member is connected to the hydraulic system through a flow meter. The hydraulic oil is automatically purified through this device to improve the purity of the hydraulic oil, and the flow meter precisely controls the amount of oil entering the hydraulic system.

Description

Technical Field

[0001] The present invention relates to the field of marine equipment, and particularly to an oil injection device and method capable of purifying oil and performing precise oil injection. Background Art

[0002] Impurities in hydraulic oil can cause inestimable harm to the hydraulic system, and this harm is particularly prominent in the hydraulic system of marine equipment. For marine equipment, pollution is mainly divided into three categories: air, moisture, and solid particles. Hydraulic oil pollution not only affects the working performance of the hydraulic system and the service life of hydraulic components, but also directly relates to whether the hydraulic system can work properly, and the vast majority of faults in the hydraulic system are caused by impurities in the hydraulic oil added to the system. Summary of the Invention

[0003] An object of the present invention is to provide an oil injection device for a hydraulic system that can purify hydraulic oil and perform precise oil injection.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An oil injection device for a hydraulic system includes an outer oil tank in which oil is stored; a hydraulic system, a heating system, a dehumidification system, a cooling system, and a degassing system; the outer oil tank is connected to the heating system through a first one-way valve, the heating system is connected to the dehumidification system through a filter, the dehumidification system is connected to the degassing system, the degassing system is connected to a filter oil pump, and the filter oil pump forms three branches after passing through a second one-way valve. The first branch is connected to the heating system through a solenoid valve; the second branch is connected to a cooling system, and the cooling system is connected to a first oil discharge member; the third branch is directly connected to the first oil discharge member; the first oil discharge member is connected to the hydraulic system through a flow meter.

[0006] Further, the first oil discharge member is provided with a first oil outlet, a first oil return port, and a first oil inlet; the first oil outlet is connected to the flow meter, the first oil inlet is connected to the filter oil pump through the cooling system; the first oil return port is directly connected to the filter oil pump;

[0007] The first oil discharge member can be controllably switched between three states. When the first oil discharge member is in the first state, the first oil inlet is communicated with the first oil outlet; when the first oil discharge member is in the second state, the first oil return port is communicated with the first oil inlet; when the first oil discharge member is in the third state, the first oil outlet, the first oil return port, and the first oil inlet are all not communicated.

[0008] Further, the heating system includes a heater, a first thermometer, and a heating oil tank. The heater is fixed in the heating oil tank, and the first thermometer is fixed on the heating oil tank.

[0009] Further, the dehumidification system includes a water storage tank and an oil-water separator, and the water storage tank is fixed at the water outlet end of the oil-water separator.

[0010] Further, the degassing system includes a vacuum degassing tank. One side of the vacuum degassing tank is connected to the dehumidification system, and the other side is connected to a filter oil pump. A vacuum pump and a pressure gauge are provided on the vacuum degassing tank.

[0011] Further, the cooling system includes a second thermometer, a cooling oil tank, and a condenser. The condenser is fixed inside the cooling oil tank, and the second thermometer is fixed on the cooling oil tank.

[0012] Further, the hydraulic system includes a hydraulic pump, a first oil bladder, a pressure reducing valve, a second oil bladder, a third one-way valve, and a second oil discharging member; the first branch of the first oil bladder is connected to a flow meter; the second branch is connected to the third one-way valve; the third branch is connected to the second oil discharging member; the third one-way valve is connected to the second oil bladder through the hydraulic pump;

[0013] The second oil discharging member has three controllable states. The first state is directly connected to the second oil bladder; the second state is connected to the second oil bladder through the pressure reducing valve; the third state is completely disconnected.

[0014] Further, the second oil discharging member includes a second oil outlet, a second oil inlet, and a second oil return port; the second oil return port is directly connected to the second oil bladder, the second oil inlet is connected to the second oil bladder through the pressure reducing valve, and the second oil inlet is connected to the first oil bladder;

[0015] When the second oil discharging member is in the first state, the second oil return port is communicated with the second oil outlet; when in the second state, the second oil inlet is communicated with the second oil outlet; when in the third state, the second oil return port, the second oil inlet, and the second oil outlet are all not communicated.

[0016] Further, the oil discharging member is a three-position three-way valve, the first oil discharging member is a first three-position three-way valve, and the second oil discharging member is a second three-position three-way valve.

[0017] Another object of the present invention is to provide a method capable of realizing precise automatic control for both the purification of oil fluid and the precise control of oil injection.

[0018] An oil injection method based on the hydraulic system described in the above embodiment includes the following steps:

[0019] Step 1: Start the vacuum pump to reduce the pressure in the vacuum degassing tank, suck the oil fluid in the outer oil tank into the heating system for heating, then pass through the filter, enter the dehumidification system, and finally enter the degassing system for degassing;

[0020] Step 2: Open the solenoid valve to enable the oil fluid in the degassing system to pass through the filter oil pump and then enter the heating system to form a cycle;

[0021] Step 3: After the circulation reaches the standard, close the degassing system, close the solenoid valve, and allow the oil to enter the cooling system. The oil enters the first oil bag through the first oil drain and the flow meter. After the first oil bag is filled with oil, the oil filter pump and the first oil drain are closed at the same time, and the first oil filling is completed;

[0022] Step 4: Then start the pressure reducing valve, the hydraulic pump and the second oil drain member, so that the second oil drain member is in the first state, the second oil inlet is connected to the second oil outlet, and the oil enters the second oil bag until the oil volume in the second oil bag reaches half; the second oil drain member is in the second state, the second oil return port is connected to the second oil outlet, and the second oil bag is filled with oil;

[0023] Step 5: After the second oil bag is filled with oil, turn off the hydraulic pump, start the oil filter pump and the solenoid valve, and the oil re-enters the heating system through the first oil drain piece, preparing for the second oil filling;

[0024] Step 6: After the oil circulates again, disconnect the solenoid valve, the oil passes through the first oil drain, and use a flow meter to control the amount of oil entering the first oil bag. When the target oil volume is reached, close the first oil drain and complete the oil filling.

[0025] The present invention has the following advantages and beneficial effects:

[0026] The present invention heats, filters and vacuums the hydraulic oil entering the hydraulic system to improve the purity of the hydraulic oil and reduce the possibility of damage to the hydraulic device caused by the hydraulic oil. The device is connected to an industrial computer and the device is directly controlled by the industrial computer. The temperature and flow meter are strictly controlled to minimize the impurities in the hydraulic oil and achieve precise oiling of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The figure is a schematic diagram of an oil injection device for a hydraulic system.

[0028] Figure 2 Schematic diagram of the hydraulic system.

[0029] Figure 3 This is a schematic diagram of the connection between the heating system and the dehumidification system.

[0030] Figure 4 It is a schematic diagram of the connection between the cooling system and the first oil drain piece.

[0031] Figure 5 Schematic diagram of the degassing system.

[0032] Figure 6 This is a connection diagram of a hydraulic system oil injection device.

[0033] Figure 7 It is a control flow chart of an oil injection device for a hydraulic system. Specific embodiments

[0034] Combined with Figures 1 to 7 , an oil injection device for a hydraulic system, including an outer oil tank 1, in which oil is stored; including a hydraulic system 2, a heating system 3, a dehumidification system 4, a cooling system 5 and a degassing system 6; the outer oil tank 1 is connected to the heating system 3 through a first one-way valve 7, the heating system 3 is connected to the dehumidification system 4 through a filter 8, and the filter 8 is used to filter solid particles in the oil. The dehumidification system 4 is connected to the degassing system 6, and the degassing system 6 is connected to a filter oil pump 10. After passing through a second one-way valve 11, the filter oil pump 10 forms three branches. The first branch is connected to the heating system 3 through a solenoid valve 12; the second branch is connected to a cooling system 5, and the cooling system 5 is connected to a first oil drain part 13; the third branch is directly connected to the first oil drain part 13; the first oil drain part 13 is connected to the hydraulic system 2 through a flow meter 14. The function of the oil injection device is to inject hydraulic oil from the outer oil tank 1 into the hydraulic system 2. This device purifies the hydraulic oil through the heating system 3, filter 8, dehumidification system 4, cooling system 5 and degassing system 6 in the oil injection device, removes excess air, water and solid particles in the hydraulic oil, and minimizes the damage caused by the hydraulic oil to the hydraulic system 2.

[0035] The first oil drain part 13 is provided with a first oil outlet 131, a first oil return port 132 and a first oil inlet 133; the first oil outlet 131 is connected to the flow meter 14, and the first oil inlet 133 is connected to the filter oil pump through the cooling system 5 10; the first oil return port 132 is directly connected to the filter oil pump 10; the first oil drain part 13 can be controllably switched between three states. When the first oil drain part 13 is in the first state, the first oil inlet 133 is communicated with the first oil outlet 131; when the first oil drain part 13 is in the second state, the first oil return port 132 is communicated with the first oil inlet 133; when the first oil drain part 13 is in the third state, the first oil outlet 131, the first oil return port 132 and the first oil inlet 133 are all not communicated.

[0036] The heating system 3 includes a heater 30, a first thermometer 31 and a heating oil tank 32. The heater 30 is fixed in the heating oil tank 32, and the first thermometer 31 is fixed on the heating oil tank 32. The heater 30 is used to heat the oil. Since the boiling point of water is lower than that of the hydraulic oil, the air dissolution rate in the hydraulic oil decreases as the oil temperature rises. Therefore, after the oil temperature rises, the dissolved water and gas in the oil are more likely to separate from the oil, improving the filtration efficiency of the oil. The first thermometer 31 is used to monitor the oil temperature in real time, and the heating oil tank 32 can temporarily store the oil.

[0037] The dehumidification system 4 includes a water storage tank 40 and an oil-water separator 41. The water storage tank 40 is fixed at the water outlet end of the oil-water separator 41, which can filter out the moisture mixed in the hydraulic oil and put the filtered moisture into the water storage tank 40.

[0038] The degassing system 6 includes a vacuum degassing barrel 60. One side of the vacuum degassing barrel 60 is connected to the dehumidification system 4, and the other side is connected to the filter oil pump 10. A vacuum pump 61 and a pressure gauge 62 are provided on the vacuum degassing barrel 60. After the hydraulic oil comes out of the dehumidification system 4, it enters the vacuum degassing barrel 60. The vacuum environment in the vacuum degassing barrel 60 will accelerate the separation of moisture and improve the efficiency of degassing the oil. The filter oil pump 10 can provide power for the device, and the pressure gauge 62 can obtain the pressure in the vacuum degassing barrel 60 in real time.

[0039] The cooling system 5 includes a second thermometer 50, a cooling oil tank 51, and a condenser 52. The condenser 52 is fixed inside the cooling oil tank 51, and the second thermometer 50 is fixed on the cooling oil tank 51. Since the heated oil will not only affect the measurement accuracy of the flowmeter 14 but also damage the oil bladder in the hydraulic system 2. The cooling system 5 cools the oil, ensuring the measurement accuracy and protecting the oil bladder at the same time. The condenser 52 is used to reduce the oil temperature, and the second thermometer 50 monitors the oil temperature in real time.

[0040] The hydraulic system 2 includes a hydraulic pump 20, a first oil bladder 21, a pressure reducing valve 22, a second oil bladder 23, a third one-way valve 24, and a second oil discharging member 25. The first branch of the first oil bladder 21 is connected to the flowmeter 14; the second branch is connected to the third one-way valve 24; the third branch is connected to the second oil discharging member 25; the third one-way valve 24 is connected to the second oil bladder 23 through the hydraulic pump 20; the second oil discharging member 25 has three controllable states. The first state is directly connected to the second oil bladder 23; the second state is connected to the second oil bladder 23 through the pressure reducing valve 22; the third state is completely disconnected.

[0041] The second oil discharging member includes a second oil outlet 251, a second oil inlet 252, and a second oil return port 253. The second oil return port 253 is directly connected to the second oil bladder 23, the second oil inlet 252 is connected to the second oil bladder 23 through the pressure reducing valve 22, and the second oil inlet 251 is connected to the first oil bladder 21. When the second oil discharging member 25 is in the first state, the second oil return port 253 is communicated with the second oil outlet 251; when in the second state, the second oil inlet 252 is communicated with the second oil outlet 251; when in the third state, the second oil return port 253, the second oil inlet 252, and the second oil outlet 251 are all not communicated. The oil discharging member is a three-position three-way valve, the first oil discharging member 13 is the first three-position three-way valve, and the second oil discharging member 25 is the second three-position three-way valve.

[0042] An oil injection method for a hydraulic system according to the above-described embodiment, comprising the following steps:

[0043] Step 1: Start the vacuum pump 61 to reduce the pressure in the vacuum degassing barrel 60, suck the oil in the outer oil tank 1 into the heating oil tank 32 for heating, then pass through the filter 8, enter the dehumidification system 4, and finally enter the vacuum degassing barrel 60 for degassing. The vacuum pump 61 evacuates the vacuum degassing barrel 60 to ensure that the vacuum degassing barrel 60 is in a vacuum state. The pressure gauge 62 is used to monitor the pressure in the vacuum degassing barrel 60 in real time to ensure that the pressure is constant. The first thermometer 31 monitors the oil temperature. When the oil temperature reaches 50 °C, the heating system 3 is turned off under the control of the industrial control computer, and the dehumidification system 4 is started to allow the oil to be dehumidified by the oil-water separator 41. Then it passes through the filter 8 to filter out solid particles in the oil. Then it enters the vacuum degassing barrel 60. In a vacuum state, the gas dissolved in the oil is more likely to precipitate, completing the degassing of the oil.

[0044] Step 2: When the pressure in the vacuum degassing barrel 60 is stable, the industrial control computer controls the opening of the solenoid valve 12 and starts the filter oil pump 10, so that the oil in the vacuum degassing barrel 60 passes through the filter oil pump 10 and then enters the heating system 3 to form a cycle; the above operation is repeated three times, and the oil is filtered through multiple cycles to ensure the purity of the oil.

[0045] Step 3: After the cycle reaches the standard, the vacuum pump 61 and the solenoid valve 12 are closed, and the oil enters the cooling system 5. The condenser 52 is opened to reduce the temperature of the oil to prevent the oil at too high a temperature from damaging the oil bladder and affecting the measurement accuracy. When the oil temperature is less than 20 °C, the condenser 52 is closed. The first oil discharging member 13 is driven into the first state, the first oil inlet 133 and the first oil outlet 131 are communicated, and the oil enters the first oil bladder 21 after passing through the flow meter 14. After the first oil bladder 21 is filled with oil, the filter oil pump 10 and the first oil discharging member 13 are closed at the same time, thus completing the first oil injection;

[0046] Step 4: Subsequently, the pressure reducing valve 22, the hydraulic pump 20 and the second oil discharging member 25 are started, so that the second oil discharging member 25 is in the first state, the second oil inlet 252 is connected to the second oil outlet 251, and the oil enters the second oil bladder 23 until the oil volume in the second oil bladder 23 reaches half; the second oil discharging member 25 is in the second state, the second oil return port 253 is connected to the second oil outlet 251, so that the second oil bladder 23 is filled with oil;

[0047] Step 5: After the second oil bladder 23 is filled with oil, turn off the hydraulic pump 20, start the oil filter pump 10 and the solenoid valve 12, so that the first oil discharge member 13 is in the second state, the first oil return port 132 is communicated with the first oil outlet 131, so that the oil re-enters the heating system 3, and then circulate the oil returned to the heating system 3 to continue purifying the oil and prepare for the second oil injection. When the oil enters the heating system 3, the first oil bladder 21 and the second oil bladder 23 are in a fully contracted state, which can also improve the oil injection accuracy and complete the oil return.

[0048] Step 6: After the oil circulates three more times, start the second oil injection. Disconnect the solenoid valve 12, so that the first oil discharge member 13 is in the first state, and control the amount of oil entering the first oil bladder 21 through the flow meter 14. When the target oil volume is reached, close the first oil discharge member 13 to complete the oil injection. The flow meter 14 can accurately control the total amount of oil injection, and thus the oil injection is completed.

[0049] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A hydraulic system oil filling device, including an outer oil tank, and the outer oil tank stores oil; characterized in that, It also includes a hydraulic system, a heating system, a dehumidification system, a cooling system and a degassing system; the outer fuel tank is connected to the heating system through a first one-way valve, the heating system is connected to the dehumidification system through a filter, the dehumidification system is connected to the degassing system, the degassing system is connected to a filter oil pump, and the filter oil pump forms three branches after passing through a second one-way valve. The first branch is connected to the heating system through a solenoid valve; the second branch is connected to a cooling system, and the cooling system is connected to a first oil drain component; the third branch is directly connected to the first oil drain component; the first oil drain component is connected to the hydraulic system through a flow meter; The first oil drain component is provided with a first oil outlet, a first oil return port and a first oil inlet; the first oil outlet is connected to the flow meter, and the first oil inlet is connected to the filter oil pump through the cooling system; the first oil return port is directly connected to the filter oil pump; The first oil drain component can be controllably switched between three states. When the first oil drain component is in the first state, the first oil inlet is communicated with the first oil outlet; when the first oil drain component is in the second state, the first oil return port is communicated with the first oil inlet; when the first oil drain component is in the third state, the first oil outlet, the first oil return port and the first oil inlet are not communicated with each other.

2. The oil injection device for a hydraulic system according to claim 1, characterized in that, The heating system includes a heater, a first thermometer and a heating fuel tank. The heater is fixed in the heating fuel tank, and the first thermometer is fixed on the heating fuel tank.

3. The oil injection device for a hydraulic system according to claim 1, characterized in that, The dehumidification system includes a water storage tank and an oil-water separator, and the water storage tank is fixed at the water outlet end of the oil-water separator.

4. A hydraulic system oil filling device according to claim 1, characterized in that, The degassing system includes a vacuum degassing barrel. One side of the vacuum degassing barrel is connected to the dehumidification system, and the other side is connected to the filter oil pump. A vacuum pump and a pressure gauge are provided on the vacuum degassing barrel.

5. A hydraulic system oil injection device according to claim 1, characterized in that, The cooling system includes a second thermometer, a cooling fuel tank and a condenser. The condenser is fixed in the cooling fuel tank, and the second thermometer is fixed on the cooling fuel tank.

6. The oil injection device for a hydraulic system according to claim 4, characterized in that, The hydraulic system includes a hydraulic pump, a first oil bladder, a pressure reducing valve, a second oil bladder, a third one-way valve and a second oil drain component; the first branch of the first oil bladder is connected to the flow meter; the second branch is connected to the third one-way valve; the third branch is connected to the second oil drain component; the third one-way valve is connected to the second oil bladder through the hydraulic pump; The second oil drain component is divided into three controllable states. The first state is directly connected to the second oil bladder; the second state is connected to the second oil bladder through a pressure reducing valve; the third state is completely disconnected.

7. A hydraulic system oil filling device according to claim 6, characterized in that, The second oil drain component includes a second oil outlet, a second oil inlet and a second oil return port; the second oil return port is directly connected to the second oil bladder, the second oil inlet is connected to the second oil bladder through a pressure reducing valve, and the second oil inlet is connected to the first oil bladder; When the second oil drain component is in the first state, the second oil return port is communicated with the second oil outlet; when it is in the second state, the second oil inlet is communicated with the second oil outlet; when it is in the third state, the second oil return port, the second oil inlet and the second oil outlet are not communicated with each other.

8. A hydraulic system oil filling device according to claim 7, characterized in that, The oil drain component is a three-position three-way valve. The first oil drain component is the first three-position three-way valve, and the second oil drain component is the second three-position three-way valve.

9. An oil injection method in an oil injection device of a hydraulic system as described in claim 7 or 8, characterized in that, It includes the following steps: Step 1: Start the vacuum pump to reduce the pressure in the vacuum degassing barrel, suck the oil in the outer fuel tank into the heating system for heating, then pass through the filter, enter the dehumidification system, and finally enter the degassing system for degassing; Step 2: Open the solenoid valve to allow the oil in the degassing system to pass through the filter oil pump and then enter the heating system to form a cycle; Step 3: After the cycle reaches the standard, close the degassing system and the solenoid valve, and let the oil enter the cooling system. The oil passes through the first oil drain part and the flowmeter and then enters the first oil bladder. After the first oil bladder is filled with oil, both the filter oil pump and the first oil drain part are closed, and the first oil filling is completed; Step 4: Subsequently, start the pressure reducing valve, the hydraulic pump, and the second oil drain part, and make the second oil drain part in the first state, with the second oil inlet connected to the second oil outlet, so that the oil enters the second oil bladder until the oil volume in the second oil bladder reaches half; then the second oil drain part is in the second state, with the second oil return port connected to the second oil outlet, so that the second oil bladder is filled with oil; Step 5: After the second oil bladder is filled with oil, close the hydraulic pump, start the filter oil pump and the solenoid valve, and the oil passes through the first oil drain part to make the oil re-enter the heating system to prepare for the second oil filling; Step 6: After the oil circulates again, disconnect the solenoid valve, the oil passes through the first oil drain part, and use the flowmeter to control the oil volume entering the first oil bladder. When the target oil volume is reached, close the first oil drain part to complete the oil filling.

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