Hydraulic lifting equipment controls the movement direction of the two cylinders. When the lift forklift workbench carries the workpiece up, the hydraulic cylinder needs to provide driving force to it, that is, the hydraulic cylinder outputs energy to the workbench; when the workbench carries the workpiece down, its potential energy will be released.
For example:
If you want to make the workbench 1 rise, the reversing valve 7 is set to the right position, and the hydraulic oil discharged from the pump 10 passes through the one-way valve 9 and the speed regulating valve 8 And the reversing valve 7 supplies oil to the rod chamber of the auxiliary cylinder 4.
At this time, the hydraulic control check valve 6 is opened, allowing the hydraulic oil in the rodless cavity of the auxiliary cylinder 4 to flow into the rodless cavity of the master cylinder 3 through the hydraulic control check valves 6 and 5.
The hydraulic oil in the rod cavity of the master cylinder 3 flows back to the oil tank 18 through the reversing valve 7, the two-position two-way reversing valve 14 and the throttle valve 15, so that the auxiliary cylinder 4 The piston rod drives the counterweight 2 down, while the piston rod of the master cylinder 3 drives the workbench 1 up.
Extended information
Conditions for driving a forklift:
1. To take the forklift license special equipment operator certificate examination, you must be over 18 years old;
2. Be in good health and meet the special physical requirements for the type of forklift operation you are applying for;
3. Have an education level appropriate to the type of special equipment operation you are applying for;
< p>4. Have work experience suitable for the type of special equipment operation for which the forklift license is applied;5. Have the corresponding safety technical knowledge and skills for special equipment operators applying for forklift license;
6. Comply with other requirements stipulated in the safety technical specifications for special equipment operators in the forklift license.
Reference materials
Baidu Encyclopedia-Elevator Principle