Lifting machine control valve reversing landed the oil cylinder, etc, often appear the following three conditions:
1 if the cylinder down beyond oil pump to oil cylinder E cavity drainage can reach speed, which constitute the lack of liquid in a vacuum, when the pump to continue upward cavity drainage, inferior vena throttling, until the full work gradually step up lift and form the elevator landing booster is slow.
2 if smaller frictional resistance of movement, the rapid land oil cylinder under the weight of the load, instantaneous excited.
3 if the paragraphs resistance unequal or movement of the trip resistance is in close proximity to the weight of the fluctuation in the moving parts such as clouds, would amount to a lower arm sometimes rely on gravity drop, sometimes need to use oil pump pressure to advance, form the lift platform landing speed instability.
2, smooth lifting machine movement measures equalization circuit: to prevent vacuum or landing prostrate and movement is not smooth, lifting machine enterprises should change as soon as possible to carry out the thoughts and the way of green technology to expand their market supporting system of standardization, open energy-efficient and circulating application of professional consumer market, enter the stage, in the form of high-end industry makes environmental savings interest, enhance the brand value of important farmar.
Oil cylinder of the inferior vena loop to a balanced valve, make the oil cylinder inferior vena constitute a detection with radar equipment movement of balance between the partial weight and pressure, the equilibrium under the action of loop, as long as when the pump cavity drainage upward pressure on the piston, make inferior vena produces pressure is higher than the balanced valve setting pressure, piston rod talents landing, the landing speed by 7 or 9 speed regulating valve flow resolution speed regulating valve, therefore the smooth movement.
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