SU1432264A1 - Hydropneumatic drive pump - Google Patents

Abstract

Invention m. used in hydraulic safety devices for crank presses. The purpose of the invention is to increase the reliability of the pump in the mode of pressure stabilization. The displacer 1 is connected to the actuator 2, the drive cavity 3 of which is connected to the source 4 of the pressure driving medium. Control device 5 plug; A control unit having a power supply unit 6 connected to the trigger input 7. The sensor 14 of the upper and lower levels of the controllable one is designed as a pressure switch. The trigger output 7 via the electronic switch 8 is connected to the input of the operation indication unit 10, the output of which is connected to the input of the driver 15. The output of the circuit breaker 15 is through the sequentially installed electronic switch 9 and the executive relay ® 11 is connected to the device 5 of source 4. 1 il.

Description

1 hour

The invention relates to pump construction, relates to pneumo-hydraulically driven pumps, and can be used in various industries of the national economy to create a stabilized pressure, for example, in hydraulic safety devices of crank presses.

The aim of the invention is to increase the reliability of the pump in the mode of pressure stabilization.

The drawing shows the proposed pump.

The pump contains an actuator 2 connected to the displacement by tele 1, the drive cavity 3 of which is connected to the pressure source 4 of the driving medium, the control device 5 of which is connected to the control unit having the power supply unit 6 connected to the trigger input 7, electronic switches 8 and 9 , block 10 of the operation indication, executive turnip 11 and sensor 14 of the upper and lower level of the monitored parameter connected to inputs 12 and 13 of the trigger 7. The control unit is additionally equipped with a chopper 15. The sensor 14 of the upper and lower levels of the monitored parameter is made in the form of a pressure relay, the trigger output 7 via an electronic switch 8 is connected to the input of the operation indication unit 10, the output of which is connected to the input of the chopper 15, and the output of the chopper 15 through a series-installed electronic switch 9 and the executive relay 11 is connected to the control device 5 of the source 4 of the pressure of the driving medium,

The control device 5 of the pressure source 4 provides a periodic supply or discharge of the drive medium into the drive cavity 3 of the pump actuator 2. In this case, the displacer 1 of the pump makes periodic movements, forcing the working medium to the consumer. The pressure of the working medium is monitored by the sensor 14. When the pressure drops below the permissible level, input 12 of the trigger 7 receives a control signal that transfers trigger 7 to the on state, and output of trigger 7 generates a signal through the electronic key 8 that amplifies signal to the input unit 10 display work. In this case, at block 10, the state of pump operation is indicated (pumping or

Q

0 5 Q ...

from 5

0

disabled state). From the output of block 10, the signal is fed to the input of the chopper 15, which sets the clock control pulses of a given frequency at its output. These pulses from the output of the driver 15 are amplified by the key 9 and arrive at the executive relay 11, which periodically connects the control unit 5 to the power unit 6 periodically with the frequency of the interrupter 15. The actuator 2 with the displacer 1 begin to make working passages and force the working environment to the consumer. The pressure of the working medium increases and when the upper threshold is exceeded, the signal from sensor 14 goes to input 13 of trigger 7 and blocks the latter. At the output of the trigger 7, the signal disappears, which makes the pump inoperative. This is indicated on block 10. The signal also disappears at the input of the actuating relay 11. In this case, the control device 5 shuts off the pressure source 4 from the drive cavity 3 of the actuator 2 and the expeller 1 stops. Subsequently, when the pressure of the working medium falls below the lower threshold, the cycle of work is repeated.

Thus, in the system, the stabilized pressure, F. the formula of the invention

A pneumatichydron pump containing an actuator connected to the expeller, the actuating cavity of which is connected to a pressure source of the driving medium, a control device connected to the control unit, which has a power supply unit connected to the trigger input, electronic keys, an operation indication unit, an executive relay and connected to the trigger inputs of the sensor of the upper and lower level of the controlled parameter, characterized in that, in order to increase the reliability of the pump in the stabilization mode, , The control unit is further provided with a breaker, the sensor upper and lower level of the controlled parameter is designed as a pressure switch, the trigger output through an electronic key connected to the input of the indication unit of work, yield ko3143226A4

Secondly, connected to the input of the chopper, the key and the executive relay are connected to the output of the chopper via a series of control devices of the source-mounted electromagnetic pressure of the driving medium.

Claims (1)

Pneumohydraulic drive pump containing an actuator connected to the displacer, a drive cavity of which is connected to a pressure source of the drive medium, a control device · of which is connected to a control unit having a power supply connected to the trigger input, electronic keys, an indication of operation, an executive relay and connected to the trigger inputs the sensor of the upper and lower levels of the controlled parameter, characterized in that, in order to improve the reliability of the pump in pressure stabilization mode, the control lock is additionally equipped with a breaker, the upper and lower level sensor of the parameter being monitored is made in the form of a pressure switch, and the trigger output is connected via an electronic key to the input of the operation display unit, the output of which is connected to the breaker input, and the breaker output is connected through an electromagnetic switch and an actuator the relay is connected to a control device of the pressure source of the drive medium.