SU68390A1 - Device for hydraulic leak testing of hollow bodies, in particular, cylinder groups of propellers - Google Patents

Description

Devices for hydraulic leak testing of hollow bodies are known, carried out by periodically filling the test body with oil and discharging the latter upon reaching a predetermined pressure acting on the distributor piston introduced into the pipeline, controlling the valve. A disadvantage of these devices is the need to reverse the motor driving the pump.

In the proposed device for hydraulic testing of hollow bodies, in particular, cylinder groups of propellers, the necessity of reversing said engine is eliminated by supplying the distributor piston with a spool device, indicating, after the operation of the piston, a discharge pipe with a drain pipe.

FIG. 1 schematically shows the proposed device, and FIG. 2 explains the effect of its part, the cycle counter, which serves to turn off the device. Test body

(cylinder / 7) is installed on the hydrocolumn 18, after which the motor of the pump 14 is turned on by pressing the start button. The latter pumps the oil through the line into the distributor 7 through the opening b of its body. The oil flows around the body of the piston 2, being between its 2L and 2P shoulder, exits through the hole a in the housing and enters the line and enters the cylinder 77 under test. Under oil pressure, the piston of the cylinder 17 rises and compresses the spring U to fully compress its turns. In this case, the pressure gauge 7 shows the pressure on which the pressure regulator 10 is adjusted by the gearbox 9. At this point, the gearbox 9 is activated, its piston moves to the right, closes the lower hole k and opens the upper hole e, which are in its housing 77. The oil passes through the hole p and the gearbox, the main and the hole d in the right cover 3 of the distributor and, acting on the right flange of the 2/7 piston 2, moves it from right to left, compressing the spring 5. At the same time, it is 351

With its right flange, the opening 2 opens a hole a, as a result of which the oil from the cylinder 77 begins to drive under pressure into the space between the shoulder 2P and the cover 3 and throws the piston to the extreme left position with a throw. In this position, the shank of the piston-: 2 passes through the opening 8 in the left cap 4 and is locked with the latch 6. Both openings b n c are between the shoulders of the F-2, as a result of which the pressure in the entire discharge line and in the test cylinder immediately drops.

3-5 seconds are spent on translating piston 2 from right to left. This is the one that is necessary to withstand the pressure in the cylinder being tested, which must be applied during the test: the holding time is a function of the piston stroke length. When the piston 2 is locked in the left position, the oil from the pump 14 passes in the same direction into the opening b 1 through the opening c is poured into the tank / 5 (the pump is idling). At the same time, the oil cannot get into the hole a from the hole b, for the right 2/7 flange cuts off this hole.

At the same time, the oil from the cylinder 17 is squeezed out ;: by wiring W through fitting 16 into the line and passing through holes a and rf in the distributor housing and through the holes e and / s in housing 7 / gearbox 9 is drained into tank 15. As The MacJia draining the tank 13 into the cylinder 17 is lowered under the pressure of the spring 19. This path for the oil is free, because simultaneously with the locking of the shank of the piston 2 in the left extreme position, the gearbox 9 is turned on, the piston of which under the action of the spring 10 moves to the left extreme position, locking the opening p and opening the opening e and A through which the oil flows out of test cylinder 17.

In this case, the oil circulates in two closed circles: I - pump / /, bore and c, tank 15, pump 14, and II-cylinder 77, fitting 16, bore line a m d in the housing

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distributor hole e and k E of the housing 77 of the gearbox O, tank 75, pump 14, cycle path 7, tank 75.

When the piston 13 is lowered in the cylinder 77, the protrusion 12 attached to the piston washer 20 engages the lever of the counter 21, counting the next double stroke of the piston 13 (up and down).

Upon further lowering of the porous 13, the protrusion 72 presses the latch 6 and releases the shank of the piston 2, which under the action of the compressed spring 5 quickly moves to the right and squeezes the remaining oil out of the distributor body 7 into the hole d and further into the tank 75. The piston 2 moves to the right up to the stop of the collar 2P in the right cover 3. In this position, the piston 2 holes a to b are between the shoulders 2L and 2P, and oil from the pump 14 is again through the holes d and a and is fed into the cylinder under test. This is the beginning of the next switching cycle. The whole process is repeated again.

During the last stroke of the piston 13 in the test cylinder 77 down, the counter 27 counts the last shift and stops the engine by pressing the “stop” button.

As shown in FIG. 2, according to the meter reading device, the lever 22 is mounted on the protrusion 72 by means of a hinge 23 and in a turning guide 27.

The left end of the lever 23 has a reciprocating motion in the vertical plane, and the right one describes an arc, on the trajectory of which the gear 24 is located. When the right end of the lever 22 goes up, it engages the tooth of the serrated tooth 24, it does not turn up and / 20 turns, i.e., counts the next stroke of the piston of the cylinder standing on the test.

When the right end of the lever goes down, it encounters the next (by piston stroke) tooth, but the ratchet 25, which sits on its end, allows the lever to slide down without turning the gear 24 back.

Thus, the lever with its ratchet turns the gear twenty times (through each double stroke of the piston to one tooth) in one direction. At the last, twentieth, move, the finger 26, mounted on the gear 24, presses the stop button and stops the electric motor. The testing process is over. When testing a new cylinder, the gear 24 with its finger 26 rotates in the opposite direction, to the initial position.

Subject invention

Claims (3)

1. A device for hydraulic leak testing of hollow bodies, in particular, cylinder groups of propellers, carried out by periodically filling the test body with oil and pressing the latter upon reaching a predetermined pressure, acting on a valve control valve inserted into the pipeline, which controls the fact that the specified piston is equipped with a spool device, which informs, when the piston operates, the discharge pipe with a drain pipe in order to eliminate the need for reversing and a motor driving the pump. 2. The device according to claim 1, that is, in order to maintain the pressure in the test body for a predetermined period of time, the piston 2 of the distributor is equipped with a shank locked in the extreme position of the piston by a latch 6, releasing the shank when exposed to a protrusion 72 on a piston inserted into the test body and loaded with a spring 19. 3. The device according to p. 1-2, characterized in that in order to automatically turn off the pump motor after a predetermined number of pressure supply cycles to the test body, a counter 21 is used, controlled by a protrusion 12 and provided with an abutment acting on the switch. FIG. one % I / o // 23 Code in. five. FIG. 2