Electronic technology and fluid motivation drive (in)

Electronic technology and fluid motivation drive (in) association of industry of weather strip of pneumatic of Chinese hydraulic pressure is advanced and advisory Yang Erzhuang 2, oil pump of variable of hydraulic pressure of development electron control, implementation is energy-saving, the flow that increases precision to realize pump of variable force plunger by electronic control equipment, pressure and power are controlled. Electronic control equipment is main by high frequency noise electro-hydraulic composition of controller of proportioning valve, pressure and displacement sensor, electron. Replace original open loop control with closed-loop control, change small processing course through microprocessor, implement all sorts of control forms of pump, reasonable power matchs and soft start, get used to bear change to change oil pump parameter (like discharge and pressure) . The pump of ALOVSODFEE variable force plunger that for instance Bosh-Rexroth company produces. On Tokyo IFPEX2005 exhibition Japanese oil grinds the company exhibited to take pump of force plunger of closed-loop control and variable of open loop pilot, have favorable energy-saving effect. They are A series 04 model electro-hydraulic scale load is passed feeling with A series 04E model electro-hydraulic pump of force plunger of variable of closed-loop control of scale discharge, pressure scale. Pump of A series 04E variable force plunger is with scale the technology combines an electron for the foundation technology and pass feeling technology, realize the pump of variable force plunger of closed-loop control. Undertake matching controlling to pressure and discharge through proportioning valve, mix by pressure sensor inclined dish angle sensor lasts to outputting pressure and discharge monitoring, make the pressure of output and flow exacter, be close to the pressure of real need and discharge more, so more energy-saving, control precision is taller also. 3, develop system of confluence of electric hydraulic pressure (Hybrid system) this is the new idea that bound of Japanese hydraulic pressure builds, be about to hydraulic pressure technology, electron technology, computer technology and confluence of electric technology photograph, abbreviation Hybrid system. It is high speed transducer (electric machinery) with pump of ration of drive of AC servo electromotor but the control system of gearshift, be in Japan this kind of system is already commercial. Should carry out implement when working, electric machinery rotate speed moves with low speed or stop to move, OK and much economic energy is used up, still can reduce noise and systematic temperature rise, the cubage of gasoline tank decreases greatly with the quantity that use oil, a few products introduce below: 1. Japanese big gold (DAIKIN) the unit of hydraulic pressure of SUT high maximum pressure that the company produces is big golden company in order to produce frequency conversion air conditioning famed at the world, they transplant technology of frequency conversion air conditioning hydraulic pressure industry, developed high speed transducer and IPM early or late energy-saving and efficient electric machinery. System of drive of IPM electric machinery used new material silicon steel piece with rare earth kind magnet, drive principle also used magnetoresistive torque besides magnetic torque. Precision of taller than efficiency of asynchronous electric machinery inside whole job limits, speed is tall, synchronous without slip, instruction movement, do not suffer character of laden influence, torque admirable, although the torque when low speed is changeless also small. The price under AC motor, add common frequency changer than asynchronous electric machinery tallish. The SUT high pressure of big gold company is super and unit shirt-sleeve big gold is particular efficient system of drive of IPM electric machinery and technology of control of hydraulic pump switch, particular virtue includes: Through set of the P of 4 kinds of mode, Q the value undertakes choosing, realized multistage pressure, flow control simply; Fractional energy savings is achieved 50% (protect the 21MPa when pressing) ; Low noise 60dB(A) (21MPa is protected when pressing) , when full load runs noise also is under 70dB(A) ; Systematic temperature rise is small, gasoline tank volume is minor, the quantity that use oil is little; Can reduce a large number of valve, reduce systematic obstruction and leakage oil drop, reduce rate of leakage oily machine. 2. Japanese oil grinds the 1H servo control that the company produces is unit the unit of hydraulic pressure of small-sized and energy-saving low noise that this unit reachs hydraulic pressure to control loop to form an organic whole by pump of AC servo motor, force plunger, gasoline tank. Control the output discharge of oil pump, pressure according to the revolution of servo electromotor, configuration takes the hydraulic pressure crock of positional sensor and special controller to be able to make system of simple and easy position, speed, pressure, closed-loop control. Its are main the characteristic includes: Save specific power consumption, protecting energy consumption of pass the time in a leisurely way of the system when pressing to be the 1/10 of old system; Noise is low, when pressure is controlled, oil pump circumgyrate is to compensate leak of oil pressure interior, oil pump is when low speed circumgyrate noise is very little; When flow control, oil pump revolution basically satisfies the flow that lead plane place needs, leaving the job under rated and top rotate speed, noise is consequently lesser; Miniaturization, because the system is calorific small, gasoline tank volume is minor, the unifinication that controls loop composition by AC electromotor, oil pump, gasoline tank, hydraulic pressure accordingly is unit, realized miniaturization, can install directly at the same time go up at lead plane. 3. Plain Qi is electro-hydraulic and shirt-sleeve system (Electro-hydraulicHybridSystem) , servo of plain Qi ECO is unit this system is by pump of force plunger of axial of electric machinery of the controller that contains pressure and discharge feedback function, transducer, induction, K3VL, valve, carry out implement the closed-loop control system that reachs sensor of pressure and position to comprise. Its characteristic is: High pressure, large flow (35MPa of the greatest actuating pressure, the platoon measures 22 ～ 140cm3) ; Get used to environmental protection requirement, use hydraulic pump of type of two class switch and combination of frequency conversion electromotor, realized economic specific power consumption and low noise movement; Because configured special controller, make those who become high accuracy is electro-hydraulic control a system; Apply at medium or small press, machine tool, test facilities reachs all sorts of industry machinery to use hydraulic pressure source; Oil pump platoon measures 22 ～ 140cm3/r (5 kinds of norms) ; Highest pressure 35MPa; Electric machinery capacity 11 ～ 55kW (5 kinds of norms) . Origin: Association of industry of weather strip of pneumatic of Chinese hydraulic pressure is advanced and advisory CNC Milling