The presentation of valves and their applications was published at the time of publication: 2006-6, author: wang wailong's summary: an overview of the products supplied by more than 200 aircraft, mainly in the form of high-pressure and fuel-resistant total electricity, has increased the automation of power plant controls and the automation of the car control system for small aircraft has been increasing. The small fleet, however, has relatively little investment, and the low-voltage pure electrical retrofit programme has addressed both the issue of investment and the requirements for automated control of power plants. In order to meet the user's requirements, xinhua began in 2001 to design an electron liquid converter (valve) driven by a straight-line motor, which is a pure electromechanical system of low-pressure penetrators. The following is a description of the structure, characteristics of the valves and their combined top purpose. The valve hydraulic valves consist mainly of the following components: permanent magnets, bearings, control of signal loops, springs for the medium, cortex and iron end covers, as shown in figure 1. Linear force horse for valves
2--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- linear power rectangular motors can drive both directions in the middle and drive the core to generate a shift in both directions, which is proportional to the current size of the input. In the process of exporting currents, the valves must overcome the springs and some external forces caused by the high-strength pair spring. In the process of repositioning the valve core, together with the output power of the medium spring and motor, push the core back to zero, making the core less sensitive to the pollution of the fluid, and the linear motor in the middle is only required to enter a very small current. There are five valves, as shown in figure 2, t, a, p, r, y and t, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p
3. For oil, which is controlled by oil pressure to control the pressure of the lower cavity of the oil-motion slider, t for oil, in our actual low-voltage control system, because it controls the pressure of the oil-motion slider, the server card adjusts the control pressure to keep constant by adjusting the size of the control signal of the valve, b is generally not used, the valve is generally used in the system to control the pressure of the oil, and the control of the export of the oil pressure a is maintained by the ratio of command and feedback. If the pressure of the four valves function valves a and b (switch control) at the valves t p5, the valve y shall be returned to the tank individually for three times, the valve a or b shall be blocked with zero openings, and the core of the valve of 1. 5% a. 3% or 10% overlap is available to select the electrical control and interface of the valves as follows:
4. The inner circuit contains circuits for the pulsation () and control of core movement of valves to drive linear motors. The circuit board is installed in the valve at 65 protection levels. It establishes an interface for the server valves and the valve control card (), the d634 valves require external provision of interface circuit 24 working power, but when the power is cut, the valve core to the valve to the center of the valve can be returned to the center of the medium, where no external force action is required. The signal can be compared to the input command signal, the signal moves to the level required for the valve core, the signal moves to the level of zero, and the core to the point of entry. 634/633 input letter
Numbers are divided into voltage input and current input. Characteristics of valves: good control performance, direct servo valves have high retracing gains in the core position of valves, stability and dynamic responsiveness are excellent, but monitoring the movement of valve cores to facilitate system failure analysis medium failure insurance, low power consumption, linear motor-by-magnetic power, almost zero power-depletion of valve cores at zero, electrical zero control, electrical zero compensation for zero drift caused by changes in loads the use of valves in low-voltage systems not only interfaces with their associated low-voltage to flat oil pure hydraulic systems, but also interfaces with low-pressure to flat oil pure hydraulic systems in multi-host plants the interface is generally based on a control signal of 00 or 0v, which is commonly used in low-voltage pure control systems for d634 and d633, not to distinguish between these two valves, but also for electrical control signals. In the system
6. The end panel used for the intermediate interface with the valve is (c290849) and the output control signal is -4040. When valves are selected to input by voltage, the internal valves and they are disconnected, the system application is subject to an output voltage of 2500 linked to the output endpoint, converted to an output voltage of 0v, which may be less than 0v in actual use due to the effect of the output power of the endboard, which does not have a disproportionate effect on the normal functioning of the control system and has a slight negative effect on the immediate dynamic response; when the valve selects current input, and short-linking, the valve input control current follows 200q electrical resistance and is then grounded, and when the control signal shows negative currents, there is an output negative increase that triggers a truncation of the door, so for this interface mode, when interfaces with the valve, a group of control signals are connected () at the same time as another group of control signals are connected to an output end of 250, avoiding the control signal being directly connected. It's effective in avoiding the valve
7. Door shaking. Figure 3 is a chart of a pneumatic 12-voltage sub-pressure pure electrode hydraulic system with an adjustable pump. The electrical component of the pure electrocution system is controlled by type, and the control and hydraulic interface components are valved. It has a main door and is controlled by safe oil using a switch-type automatic shut-off. A high-motion motive and a medium-pressure drive are each controlled by a valve. 1. The retrofit points and configurations of the pure electro-regulating hydraulic system are as follows: the regulatory component: the motor for oil in the hap-type motor-regulating system is the hydraulic feedback break-out double-side oil-entry motor. For the control of the appropriate valve, the hydraulic reverse feedback of the oil motive was cancelled, and the oil motive consisted mainly of the wrong door and the oil motive piston. Add a double redundancy to the oil motor piston to be used as a feedback locator for the oil motor trip. Arrangeable flow valves on each oil-motive pulsed oil road to adjust the misoil of the oil-motion the door
8. Distortion, so that when the valves lose power, the oil motive can be automatically shut down. Part of the security system: the security system is the traditional structure of a chariot-type engine. There are also start-up slide valves, which can operate remotely to hold the valves, build safe oil and open the main door. In addition to this, the following components are added: a double-connected electromagnetic valve is added for each high- and medium-pressure oil motor to limit the speed of the discharge dynamic. Add a redundant double electromagnetic valve, which receives an electrical protection signal for the aircraft, and when any one of the electromagnetic valves moves to release additional security oils, it causes the crew to shut down through the emergency cover of the slide valves and the high- and medium-pressure oil motor pulses. Put pressure switches on safe oil roads 2 to give signals for instructions and lock protection. The strong advantage of using digital controllers is that they can use complex algorithms of computers to achieve the decomposition control of power, pump pressure, i. E. To ensure self-regulation of regulation. Rotation
When power changes, receive a power command signal, send a valve command signal by decomposition, and when the server amplifier is amplified, converts the telecommunications signal from the valve to a hydraulic signal to control the high, medium-pressurized motor to be opened or switched on in the same direction to increase or reduce the power of the engine, so that the volume of the pump is not affected. In the event of a change in the temperature of the medium pump, e. G., an increase in the volume of the medium pump which reduces the pressure of the medium pump, the acceptance of the regulation instruction, after decomposition, sends a valve signal, which, after amplification by the server amplifier, increases the pressure of the medium valve by reducing the pressure of the valve (or the rotary partition) by reducing the pressure of the pressure valve (or the steering panel) and increases the pressure of the medium pressure, without affecting the power of the engine. In the case of a reduction in the volume of the middle charge, the adjustment process is the opposite. This allows for easy and accurate self-regulation. Three. Valve debugging. Valve command signal one
10. When the valves are not signaled, adjust the throttle valves so that the pulsed oil pressure that controls the oil motive is about 05 less than the pulsed oil pressure when the oil engine is wrongly balanced in the middle, i. E. . 05, so that the wrong door is somewhat biased in the direction of the shut-off, so that when the valves fail to power, the motor can automatically shut down to ensure the safety of the aircraft. The server system is then static and dynamically debugged. When testing the oil-motive characteristics, control the pressure stabilizes, the oil-motive produces irregular swings, usually the oil-motive slide valves are impervious, and the oil-motive breakup should be cleaned. If the valve works properly, the card may be corrected as appropriate until the oil motive stabilizes. When the valve enters a current signal, the pulse pressure is unstable and creates an oil motor swing. It is possible to check whether the nodal vent is blocked, causing a swing due to insufficient oil supply. Increase the oil quality of the system to ensure that the valves are not incisive. The valves are currently used more broadly in the car control system of the small unit, to ascertain the characteristics of the object, to select the right mode of connection, to ensure the safety of the unit under various conditions during static adjustments, to maintain the oil quality of the system after operation, to ensure long-term stability of the system, and to have a low-voltage pure electrical control system as a more economical option。
