Hydraulic station novel closed control system

Abstract

The invention discloses a hydraulic station novel closed control system. The system comprises a hydraulic station, a liquid nitrogen storage tank, a vaporizer and a central processing unit, the hydraulic station comprises an oil tank, an oil suction filter is arranged in the oil tank, and an air cooler is arranged at the top end of the oil tank; the hydraulic station is provided with a temperature sensor, and the temperature sensor is in signal connection with the central processing unit; and according to the system, the oil temperature of the hydraulic station can be effectively controlled within a reasonable temperature range, so that all parts (such as a hydraulic valve and various sealing elements) of the hydraulic station are protected, and the service life of the hydraulic station is prolonged.

Description

technical field [0001] The invention relates to the technical field of energy conversion, in particular to a novel closed control system of a hydraulic station. Background technique [0002] The hydraulic station is an energy conversion device, which converts electrical energy into the pressure energy of the working medium and delivers the working medium with a certain pressure and flow to the hydraulic system; the hydraulic station generally consists of a pump, an oil tank and some hydraulic accessories (heat exchanger, Filters, temperature control components, accumulators, pressure gauges and pipe fittings, etc.), these accessories are relatively independent and can be selected according to different requirements of the system. Some hydraulic control components (various control valves) are sometimes also used as valves The form of the group is installed on the hydraulic station. [0003] When the hydraulic system is working, except for the effective power output by the ac...

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Problems solved by technology

[0004] The first is that after the oil is oxidized at high temperature, impurities such as asphalt and colloid are produced, which block the small holes and gaps in the hydraulic components, resulting in many failures of various hydraulic valves

[0005] The second is that the rubber seal will be deformed such as expansion, hardening, softening, cracking, etc., which will affect the life and sealing performance of the seal, and the leakage will further increase the oil temperature.

[0006] The third is that the air separation pressure of the oil decreases, and the dissolved air in the oil overflows, resulting in cavitation, which affects the working performance of the hydraulic system

[0007] Fourth, the viscosity of the oil decreases, the leakage increases, and the volumetric efficiency is reduced

As the viscosity of the oil decreases, the oil film on the sliding valve and other moving parts becomes thinner and cut, resulting in increased frictional resistance, increased wear, and a further increase in temperature

Statistics show that the stable service life of the mineral oil medium will be reduced by about 10 times for every 15°C increase in the temperature of the mineral oil medium

[0008] The fifth is to cause thermal deformation, so that the gap between relative moving parts with different thermal expansion coefficients becomes smaller, or even stuck, making it incapable of working

The above two situations will cause the hydraulic oil temperature to exceed the allowable temperature of servo valves, proportional valves and other valves, which will cause damage to the sealing components (such as sealing rings, etc.) and valve cores of hydraulic valves, and make the sealing components aging and damaged; Due to thermal expansion and contraction, the dimensions of precision components such as hydraulic valve cores are deviated, and the valve stem is stuck, which makes the hydraulic valve damaged and invalid, resulting in large economic losses.

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