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1、外文Hydraulic System for Pre-presserAbstract The paper introduces the composition, operation principle and features of the pro-pressers hydraulic system, and also the maintenance of the system in detail.Keywords hydraulic system, maintenance of hydraulic systemAt present, high-pressure hydraulic techn
2、ology in achieving the flow and high efficiency, durability and a high degree of integration, and other requirements have made significant progress, is increasingly show their vitality. Tobacco industry in the application are very wide.1.Packing a hydraulic transmission unit and the composition of t
3、he working principle 1.1 packing principle hydraulic transmission unitPre-pressure hydraulic system is the core of the package unit, hydraulic system, the EC will have a direct impact on surcharging packing unit performance. Two of the hydraulic press-hydraulic system (Figure 1) from the main hydrau
4、lic Pumping Station, hydraulic pipeline systems and components, such as fuel tanks, hydraulic pump station and from fuel tanks, hydraulic pump group, control valve block, filter cooling system components, pre-pressure fuel tanks and to upgrade the fuel tank movements relying on liquid pressure to ac
5、hieve. when the fuel tanks do not work, the oil pump pressure relief valve can be electromagnetic or reversing valve function to the median unloading. electromagnet when DT 15 (or 16 DT) for electricity, No. 64.1 (or 64.2) hydraulic control valve opened, the fuel tank could surcharging formed differ
6、ential circuit, the whereabouts of freedom fast downlink capabilities, in a free whereabouts stage liquid-filled tank filled through the valve (68.1 or serial number 68.2) to the master cylinder on the cavity quickly add oil. surcharging a multi-pump fuel tanks were unloading oil and the form of pre
7、-pressure fuel tanks to achieve rapid, slow speed, and other requirements of the one-way expenditure the fuel tank valve adjustable speed buffer or speed, the cooling system can strictly control the oil temperature, sophisticated filter system can improve the cleanliness of hydraulic oil, which are
8、guaranteed hydraulic system is reliable and effective measures. below to the 1st surcharging Machine as an example to illustrate: Start pump motor, the oil-absorbing oil by the Oil Filter 19.1, 20.1 closing valves, joints 21.1 avoid vibration, 22.1 pumps, the one-way valve 34.1, 36.1 one-way valve,
9、71 high-pressure hose, 72 high-pressure hose , 46 the return of electromagnetic relief valve tank. when the fuel tanks on the trip on the 1st, at 46 relief valve electromagnet in the electromagnetic power, 62.1 in the two four-way reversing valve electromagnetic power, to control oil by 73 high-pres
10、sure hose, high-pressure 79 Hose, 48 valve hydraulic valve to 68.1, 68.1 hydromechanical valve is opened, hydraulic oil, as oil-absorbing Oil Filter 19.1, 20.1 closing valves, joints 21.1 avoid vibration, 22.1 pumps, the one-way valve 34.1, 36.1 valve , 71 high-pressure hose, 72 high-pressure hose,
11、73 high-pressure hose, a one-way valve plate 58.1, 59.1-throttle one-way, one-way 60.1-throttle into the cavity under the fuel tank, the fuel tank cavity Oil 68.1 hydromechanical valve to the tank filled, increased fuel tanks at this time, when on the stroke at the end of 46 relief valve electromagn
12、etic power, 62.1 2 Stone SOLENOID VALVE power, hydraulic oil by 46 electromagnetic overflow the return valve tank. Pistons down when oil tanks, fuel tanks of the requirements of the oil pressure than piston tobacco reacted less fuel tanks Detroit Pistons bars and the weight of the fuel tank downlink
13、 therefore can be divided into four stages: the first one Pressure stage is the initial stage of the first downlink, and then because of pressure head, rod, rod-oriented, such as greater weight, and mechanical and electrical equipment to start-trip air is not the resistance to tobacco, tobacco press
14、ure head start contacts since then Tobacco is very loosely, and small resistance, thereby pressure head completely on themselves under pressure, pre-cavity pressure on the fuel tank of a vacuum. whereabouts of this stage that free stage. liquid-fuel tank at the atmospheric pressure in the role of oi
15、l through 68.1 on the fuel tank into the cavity, 66.1 electromagnetic ball valves for two to three links will be 64.1 cartridge valve is opened, the inferior vena cava through the differential oil to the fuel tank cavity, the pump provided by the oil pressure relief valve through the electromagnetic
16、 46 in the fuel tanks, entered the superior vena cava.The second phase, due to breathing compressed tablets, the first downward pressure growing resistance, this resistance when pressure is greater than the first, and then the weight of the piston rod, the cavity pressure to the fuel tank pressure, the pressure at this time first on the oil pressure to push the Pistons to downlink. filled at 68.1 valve closed cavity under the oil differential progressive cavity to return,
