Technical Introduction of Hydraulic Jacks for Grain Silo

A. Technical introduction

The pump station is composed of fuel tank, motor, high pressure oil pump, adjustable relief valve, three-position four-way solenoid valve, pressure gauge and so on.

Start the motor, the high pressure oil pump starts to supply oil, the system pressure is adjusted by the adjustable relief valve, and the pressure gauge shows the pressure value to meet the working requirements. The three-position four-way solenoid valve implements the functions of cylinder plunger down, return and cylinder unloading through electric control reversing to meet the requirements of different working conditions. The flow valve plays a reliable overload protection role to ensure that the hydraulic cylinder and the motor are not damaged due to pressure overload.

The unit of pressure measurement shown in the pressure gauge is Mpa(Mpa). The indicator of each MPA can produce the pressure value when the cylinder piston goes down, as shown in Table (2). The user can adjust it according to needs. When adjusting, the electromagnet down the piston is energized, and the pressure shown on the pressure gauge is the actual working pressure. When the relief valve hand wheel is adjusted clockwise, the system pressure increases, and vice versa, the system pressure decreases. When adjusting, turn the handwheel slowly to prevent damage to the parts of the pressure system. The system pressure should be adjusted according to the liquid pressure required by the equipment.

B. Equipment installation, commissioning and commissioning

1, after the machine to the factory, check the documents and accessories, etc., the machine should pay attention to safety when lifting. Intrinsic pressure

The machine should be installed on a dry concrete foundation without dust pollution, the workbench part should be horizontally installed, and the whole machine should be stable without vibration. Then connect the oil cylinder and the oil pipe of the hydraulic control part to ensure that the oil pipe joints are firmly connected without oil leakage.

Due to transportation vibration, each part should be checked for loosening and re-tightened with relevant tools.

The tank is filled with filtered N46 anti-wear hydraulic oil or N46 low point hydraulic oil. Check that electrical equipment is in good condition

2, test: before starting, we must understand the structural principle and performance of the machine, and the motor should be activated 23 times before starting

When the normal operation can be normal, attention should be paid to whether the rotation direction of the motor is correct. If reverse, switch two phases

The source line is fine.

C. Precautions

1, the pressure machine should be correctly grounded, to separate grounding is better;

2, the machine is not allowed to correct the mold in operation;

3, the hydraulic oil is N46 anti-hydraulic oil or N46 low-condensate hydraulic oil, after 80-100 mesh mesh filtration, the first oil change time is not more than two months, after every six months to change

Oil once;

4, the machine should check the cleanliness of the oil after 200 hours of work, requiring no odor, drop a drop of oil on the white filter paper, there is no black lag in the center of the oil trace, otherwise the oil should be changed;

5. The pumping station shall not be used under overpressure;

6, in case of accidental leakage of the system, sufficient hydraulic oil should be added after eliminating the fault:

7, often check the pump station, oil tank cleaning, strictly prohibit water, dust, foreign matter into the tank;

8, such as the conversion function, the air in the system should be drained to work; 9, in the test and work, if there is an anomaly should be stopped immediately for inspection

9, in the test and work if there is an anomaly should be immediately shut down for inspection

D. Common equipment faults and troubleshooting methods

Image occurrence	Reason	Method of elimination
The pressure drops obviously when the   lifting rod is not moving or the pressure is kept	There is dirt in the high-pressure pump or   the oil seal is damaged	Clean or replace
	Dirt, wear, or damaged oil seal in the   control valve	Reconnect the motor wire
	Oil pump reversal	Reconnect the motor wire
	The safety valve is not set properly	Set the safety valve
	There is not enough oil in the tank	Add plenty of oil
Pressure instability or crawling   phenomenon	The oil is dirty or the pump or valve is   dirty	Replace oil or remove
	There is air in the oil or pipe	Number of empty strokes
	Oil seal in high pressure pump or control   valve is damaged	Switch
	The lack of oil makes the pump empty	Add plenty of oil
Oil leak	The oil seal is damaged and the screw plug   is not tightened	Screw down