Pneumatic booster system for hydraulic oil tank of construction machinery

Abstract

The invention discloses a pneumatic pressurization system for hydraulic oil tanks of engineering machinery, which comprises an air compressor, a reversing valve, a drier, a regeneration air storage tank, an air storage tank, a pressure reducing valve, a hydraulic oil tank and an overflow valve; the air compressor Connected with the prime mover and driven by the prime mover; the reversing valve is connected between the outlet of the air compressor and the inlet of the dryer; the regenerative gas storage tank and the gas storage tank are respectively connected with the outlet of the dryer; the pressure reducing valve is connected to the gas storage tank Between the hydraulic oil tank; the overflow valve is installed on the hydraulic oil tank. The invention utilizes Pascal's principle to increase the absolute atmospheric pressure in the hydraulic oil tank by inputting compressed air into the hydraulic oil tank, thereby increasing the pressure of the oil suction port of the hydraulic pump, avoiding the phenomenon of cavitation, and ensuring the normal use of construction machinery in plateau areas.

Description

technical field [0001] The invention relates to a pneumatic pressurization system for hydraulic oil tanks of engineering machinery, which belongs to the field of mechanical equipment. Background technique [0002] Large-scale construction machinery is the main construction machinery in the construction of earthwork in mines. With the development of my country's economy, the demand for resources continues to increase, and it is necessary to vigorously develop the development of mining resources in plateau areas. Large-scale construction machinery includes a hydraulic system. The hydraulic pump in the system has a large displacement and relatively poor self-priming ability. In addition, the atmospheric pressure on the plateau is low, and the pump is prone to cavitation. Studies have shown that 80% of hydraulic system failures are caused by system pollution, and 16% are caused by air suction, which will cause cavitation in the hydraulic system, aggravate vibration and noise, an...

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Problems solved by technology

Large-scale construction machinery includes a hydraulic system. The hydraulic pump in the system has a large displacement, and the self-priming ability of the pump is relatively poor. In addition, the atmospheric pressure on the plateau is low, and the pump is prone to cavitation.

Studies have shown that 80% of hydraulic system failures are caused by system pollution, and 16% are caused by air suction, which will cause cavitation in the hydraulic system, aggravate vibration and noise, and seriously affect the service life of equipment. In order to make the existing large construction machinery To meet the requirements of use in plateau areas, it is necessary to increase the suction pressure of the pump

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