SU1649339A1 - Device for liquid leakage control - Google Patents

Abstract

The invention relates to the control of tightness of hydraulic seals in hydraulic units and allows to increase the reliability by eliminating the influence of parasitic volumes and the effects of stray seals. The piston 2 is installed in the housing 1, made with the inlet channel 3 and with the groove 8 in the zone of the channel 3. The piston 2 is made with the nozzle 4 as a flip on the outer surface and the output channel 5 connecting the nozzle 4 with the pallet 6. The cavity 13 of the housing 1 connected via a pressure switch 11 to a liquid quantity meter 9. The constant speed mechanism 12 has a rod 14 with a fifth 15 that interacts with a plug 16 located on the piston 2. The leakage occurs through the inlet channel 3 and the liquid enters the cavity 13. After the holding time the rod moves through the cavity 13, the liquid is expelled from it through pressure switch 11 and nozzle 4. Fix the opening time of pressure switch 11, calculate the leakage value. 1 hp ff, 2 ill. Yo

Description

The invention relates to an instrumentation technique and can be applied to measure fluid leaks from an item, for example, leaks through seals in a hydraulic unit.

The aim of the invention is to increase reliability by eliminating the influence of parasitic volumes and the external environment.

FIG. 1 shows the proposed device; in fig. 2 is a section A-A in FIG. 1.

The device for monitoring the leakage of fluid from the product includes a housing 1 in the form of a hydraulic cylinder. The piston 2 is located in the housing 1. The latter has an inlet channel 3 in the cylindrical wall. The piston 2 is made with a calibration jet 4 in the form of a flat on the outer surface of the piston 2 facing the inlet channel 3. The output channel 5 is made in the piston 2 and connects the pallet 6 through the sub piston cavity 7

housing 1 with a jet 4. The inner wall of housing 1 is made with a groove in the area of the opening of the inlet channel 3, the meter 9 of the amount of fluid through the chronometer 10 and the pressure switch 11 is connected to the cavity 13 of the housing 1. The mechanism 12 of the reciprocating constant speed 14, ending at 15. 15. A piston 16 is disposed on piston 2, cooperating with fifth. 15.

A device for monitoring the leakage of fluid from the product works as follows.

Install the housing 1 so that the calibration nozzle 4 of the input channel 3 is on top. In this case, the piston 2 under the action of the constant speed mechanism 12 moves to the extreme right position, the liquid is expelled from the internal cavity 13 of the housing 1, after which

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with so

ABOUT

is rotated back, then a set of leakages from the hydraulic unit is made in the cavity 13 for a strictly fixed time. Leakage control is performed using the rod 14, which moves the piston 2 to the right, is forced out of the internal cavity 13 of the housing 1, the fluid through the nozzle 4 and the exhaust channel 5. First, the air flow expires, at the time of the beginning of the displacement of the fluid through the nozzle 4 cavity 13, pressure relay 11 triggers, liquid quantity meter 9 switches on, leaks are forced out until the piston 2 is in the extreme right position, then pressure in the arc cavity 13 decreases, gauge 9 opens. The time during which the meter was closed 9. and determine the amount of fluid in the internal cavity 13 of the housing 1.

The measurement accuracy is 0.01 cm. Leakage can be measured between 0.2 and 20 cm3. As the mechanism 12 of a constant speed, the ML-100 MT electromechanism can be used. The working fluid can be oil AMG-10 GOST 6794-53. Leak measurement time 9-14 s.

A device for monitoring fluid leakage also improves the accuracy of control and simplifies the design as a result of the absence of additional components in the device in the form of check valves by flashing a portion of the cylindrical surface of the piston and displacing the leakage through the pot, as well as the absence of losses in the calibration nozzle The piston is a piece of flats on a part of the cylindrical surface of the piston and is connected to the exhaust channels, thus making it possible to carry out very small dimensions.

Performance is also improved by reducing the time:

leaks into the hydraulic cylinder cavity by using two-position

the distribution between the leak source and the measuring device;

for leakage cut-off due to the connection of the / inlet nozzle with the exhaust channels and dividing the hydraulic cylinder by a recess into the sub-piston cavity of the output channel;

overlap the inlet channel by placing a calibration jet on the outer surface of the hydraulic cylinder piston, made in the form of a flathead.

In addition, technological capabilities are expanded by increasing the measurement range.

Claims (2)

1. A device for monitoring leakage of fluid from the product, comprising a cylinder-shaped body with an inlet channel in a cylindrical tube, a piston located in the cylinder, a calibration jet, a chronometer, a quantity meter connected to the cylinder cavity through a pressure relay, a reciprocating mechanism motion of a constant speed, connected to the piston, a pallet connected through an outlet to the jet, characterized in that, in order to increase reliability by eliminating the influence of parasitic volumes the external environment, the calibration orifice is made in the form of flats on the outer surface of the piston facing the input channel, output channel formed in the piston and connects the sump through the cavity above the piston of the hydraulic cylinder with throttle and the inner cylinder wall is formed with a groove in the zone of inlet openings. 2. The device according to claim 1, wherein the connection of the piston with the reciprocating mechanism is in the form of a plug located on the piston and the reciprocal mark of the reciprocating mechanism. 2.