SU1495205A1 - Electrohydraulic steering engine and method of diagnosis same - Google Patents

Abstract

This invention relates to the field of shipbuilding, in particular, to electrohydraulic steering gears. The purpose of the invention is to increase the reliability and simplify the diagnosis of the technical state. Diagnosing the electrohydraulic steering gear is carried out by measuring leaks at the inoperative pump 17 (18), while the pressure and flow rate of the working fluid are supplied to the pump from the main line by the pump 18 (17) operating on the closed valve boxes 4, 5. 2 sec. P . f-ly, 1 ill.

Description

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This invention relates to shipbuilding, in particular to electrohydraulic steering gears.

The purpose of the invention is to increase the reliability and simplify the diagnosis of the technical state.

The drawing shows a schematic diagram of an electro-hydraulic steering machine.

The electrohydraulic steering machine contains a power actuator 1, which is hydraulically connected to pump units 2 and 3 through valve boxes 4 and 5, on which boxes of safety valves 6 and 7 are located, while pumping units are hydraulically connected to additional tanks 8 and 9.

The power actuator includes cylinders 10-13, in which plungers 14 and 15 are placed, kinematically associated with the tiller 16. Through the tiller 16, the power actuator 1 is connected to a rudder baller (not shown).

Pump units 2 and 3, respectively, contain the main pumps 17 and 18 of variable flow, kinematically, through electric motors 19 and 20 connected to auxiliary pumps 21 and 22 of control and make-up, hydraulically communicated through non-return valves 23 and 24 with cut-off valves 25-28 and through shut-off valve 29 among themselves, as well as through safety valves, eel valves 30 and 31 with make-up valves 32-35 and through safety valves 36 and 37 with main pump housings 17 and 18 of variable flow. The latter are hydraulically communicated with valve boxes 4 and 5 by means of power lines 38-41, in which safety valves 42-45 are installed.

The main pump housings 17 and 18 of variable flow are communicated through permanently open shut-off valves 46 and 47 with additional tanks 8 and 9, in parallel with which the measuring tanks 48 and 49 are installed.

Valve boxes 4 and 5 contain shut-off valves 50-59.

The device works as follows.

To determine the volumetric characteristics (measurement of leaks) of the main pump 17 of the variable feed of the pump unit 2, preparatory operations are performed: to supply pressure to the cavity connected to the power line 40 of the variable feed pump 18, open the shut-off valve 29 and close the stop valves 51, 56 and 46, record the level of the working fluid in the measuring tank 48.

When starting the pump unit 3, the main variable feed pump 18 and the auxiliary control and make-up pump 22, which received rotation from the electric motor 20, start to operate, while the auxiliary control and make-up pump 22 provides for opening the shut-off valves 27 and 28 of the pump unit 3 and through the stop valve 29 shut-off valves 25 and 26 of the pumping unit 2, as well as feeding the circuit of the main pump 18 of the variable flow through the make-up valves 34 and 35 and the controllability of the main pump 18 of the variable flow (controls The main pump is not shown).

When supplying the working fluid through the power line 40, the working fluid through the check valve 55 of the valve box 5, the check valve 50 of the valve box 4, the shut-off valve 25 enters the power line 38 of the main variable-feed pump 17 of the pump unit 2, while at the power lines x 38 and 40, the pressure of the working fluid rises to the magnitude of the response of the safety valve 44. The pressure of the working fluid from the main

pump 18 variable flow affects the valve and cylinder block (not shown) of the main pump 17 variable flow, while in the measuring tank 48 leakage flows through the valve and cylinder block of the main pump 17 variable flow into the latter.

The amount of leakage through the main pump 17 of the variable flow is determined from the amount of working fluid that has entered the measuring capacity, which allows to judge the volumetric efficiency of the pump, its technical condition and the possibility of further operation.

When measuring leaks through the main pump 17 of the variable flow, when the pressure is applied to the cavity connected to the power line 41 of the variable flow pump 18, the shut-off valve 29 is opened and the shut-off valves 53 and 58 of the valve boxes 4 and 5 and the shut-off valve 46 are closed and the level of the working fluid in the measuring tank 48.

The working fluid is supplied by the main pump 18 of the variable flow to the power line 41 and through the check valve 59 of the valve box 5, the check valve 54 of the valve box 4, the shut-off valve 26 enters the power line 39 of the main pump 17 of the variable flow, and in the power lines x 39 and 41, the pressure of the working fluid rises to the magnitude of the operation of the safety valve 45.

The pressurized working fluid is displaced through the gaps in the main pump 17 of the variable feed into the pump casing and from there into the measuring tank 48.

Leakage measurement through the main pump 18 of the variable flow of the pump unit 3 with the help of the main variable variable pump 17 of the pump unit 2 is measured in the same way.

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Claims (2)

Invention Formula 2. Method of diagnosing electro1. Electro-hydraulic steering gear ma-hydraulic steering machine having the bus contains, and the power executive has two pumping units with osmehanizm, kinematically connected with variable feed bolster pumps, an osnaler steering wheel and hydraulically coupled gear for measuring leaks in the main pump, cut valve boxes and shut-off valves are distinguished by the fact that, in order to increase with pumping units and additional reliability and simplified diagnostics tanks, characterized in that, in order to the technical condition of the steering machine, increase the reliability and simplify the diagnostics of the leaks in one main pump of the technical state of the rudder when it is turned on and machine, it is equipped with a non-returnable mid-position of the pump cradle by means of interlocking valves and measuring capacitance of supplying the working fluid under pressure, respectively, installed in the hydraulic system from the Other operating pump and draining control lines for shut-off valve leakage from the main body being inspected panes and pumping units of the pump in measured capacity, with additional tanks.