Vacuum pump in biogas slag suction car

When the vacuum pump draws air from the tank and reaches a certain negative pressure for slag suction, the back-end valve is usually closed first, and then the vacuum pump is stopped. At this time, there is still a certain degree of vacuum in the tank, and the mechanical oil will be sucked into the tank (visible through the steel wire hose for connection).

When the vacuum pump inflates and pressurizes the tank, due to the vehicle running on the field, there must be a shift demand. However, the pump will stop when the clutch is pressed. If the vacuum pump stops running, a large amount of mechanical oil will be sprayed outside.

As the rotary vane vacuum pump needs a certain amount of mechanical oil lubrication and sealing, and the existence of the above two phenomena will lead to the loss of more than 1L of stored mechanical oil, which needs continuous replenishment by operators. In this way, it not only causes great waste of manpower and material resources, but also reduces the work efficiency, even damages the parts of vacuum pump, and also causes certain pollution, which seriously restricts this kind of vehicle To promote the use of.

In order to overcome the above problems, some enterprises use the method of refitting "air compressor" instead of "vacuum pump", but the production cost is greatly increased, and the air compressor body is too large, and the layout is difficult.

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