SU909278A2 - Hydraulically driven reciprocating pump - Google Patents

Description

(54) HYDRO-DRIVE RETURN AND SUPPLEMENTARY PUMP

one

FIELD OF THE INVENTION The invention relates to hydraulic engineering, in particular to hydraulically driven pumps.

According to the main author. St. No. 568738 is known for a hydraulically driven reciprocating pump, comprising two single-acting cylinders with movable propellants, a reversing device and a motion synchronizer of cylinder propellants, made in the form of a flexible thread, supported on a rotating block in which the propellant synchronizer is elastic link, and the elastic link is made in the form of a spring associated with the rotating unit 1.

The disadvantages of the known device is the cessation of fluid movement in the discharge of the drive medium during the reverse period and its subsequent acceleration, which leads to hydraulic shocks and reduces the reliability and power consumption of the device.

The purpose of the invention is to increase reliability and energy intensity.

This goal is achieved by the fact that in the hydraulically driven reciprocating pump, the motion synchronizer of the displacers is equipped with a sealed chamber of variable volume hydraulically connected with the discharge of the driving medium and kinematically with a rotating unit, and an elastic link is placed in the chamber.

The drawing shows schematically the proposed hydraulically driven return pump.

It contains working cylinders 1 and 2 of the flushing part, power cylinders 3 and 4, a reversing device in the form of a four-way distribution two-way spool 5. The working cylinders 1 and 2 contain propellants 6 and 7, suction valves 8 and 9, and pressure valves 10 and 11. The displacers 6 and 7 are rigidly connected to the displacers 12 and 13 of the power cylinders, which, in turn, are fastened together by a flexible thread 14 passing through the rotating block 15 and being the synchronizer of the motion of the displacers. The block 15 is located in the movable casing 16 supported on an elastic element, for example, a spring 17. The drive medium is supplied by a hydraulic pump 18.

Claims (1)

The valve control system 5 includes a valve 19 and a pump 20. Pumps 18 and 20 are equipped with safety valves 21 and 22 and pressure gauges 23 and 24. The pumped medium is supplied through a suction manifold 25 connected to the rod cavities 26 27 and suction cap 28, discharge valve 10 and And interconnected by a collector 29. Elastic link 17 is housed in a variable volume chamber 30, kinematically connected to a rotating block 15 through a sleeve 16 and a hydraulic line 31 with a discharge medium 32. The device works as follows. Under steady-state operation, the spool valve 5 occupies one of its extreme positions and the driving medium from the pump 10 enters the corresponding pressure cylinder, for example 3, acts on the displacer 6, which moves, pumps the pumped medium into the discharge manifold 29. At the same time, the displacer 12 through the thread 14 acts on the displacer 13 and through a rigid connection to the displacer 7, which is moving, sucks the spraying medium from collector 25. When switching the valve 10, the drive medium from the pump 20 enters under the end cover of the spool valve 5, which begins to move from one extreme position to the opposite, closing, first of all, the drain from the hydraulic cylinder 4. At the same time, the displacement speed of the displacer decreases to zero, and the rotating block 15 and the sleeve 16 begin to move, deform the elastic link 17 and drive the driving medium out of the chamber 30, in which the elastic link 17 is located, to the drain line 31. With further movement The first distributor 5 connects the working cavity of the cylinder 3 to the cavity of the cylinder 4 and then redistributes the flow between the power cylinders, which in turn leads to a corresponding redistribution of pressures and speeds at which the speed of movement of the displacer 6 decreases, and the speed of movement of the displacer 7 increases, reaching its nominal value at the moment the displacer stops 6. Thus, the constant flow rate of the pumped medium at the outlet of the heater pump nozzle. In addition, due to the entry of the driving medium of the chamber 30 into the drain line 31, the movement of the driving medium at a nominal speed is maintained in it during the reverse period. After opening the discharge of the cylinder 3, the synchronization system returns to its original position due to the energy accumulated in the elastic element 17 during the reverse. At the same time, the rate of suction of the displacer-ft exceeds its nominal value mid-stroke, but due to the fact that part of the drive medium enters the chambers 30, there is no sharp increase in the speed of the current in the drain line, and the likelihood of a hydraulic shock is reduced. Thus, the reliability and power consumption of the proposed pump is increased. The invention of the hydraulic reciprocating pump aut. St. No. 568738, characterized in that, in order to increase reliability and power consumption, the motion synchronizer of the displacers is provided with a sealed chamber of variable volume, hydraulically connected with the discharge of the driving medium and kinematically with a rotating unit, and an elastic link is placed in the chamber. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 568738, cl. F 04 B 9/08, 1973. 29 ikl / // y-- fS