SU1472805A2 - Device for assessing anti-wear properties of fluid under pressure - Google Patents

Abstract

This invention relates to devices for evaluating the antiwear properties of pressurized fluids. The aim of the invention is to increase the reliability of the results by providing a constant contact pressure. During the wear of the counterpiece 10, the holder 9 under the action of the spring 33 moves to the sample 35 by the amount of wear, which upsets the equilibrium of the elastic forces of the springs 6 and 11 and the flexible elements 14 and 15. The latter, having restored, move the plunger 5 with the stops 12 and 13 in reverse direction. In this case, the bridge circuit is unbalanced and the screw 18 of the loading unit 19 is set in motion by means of an actuator. In this way, the load is increased to a constant contact pressure. 2 Il.

Description

The reliability of the evaluation results contrasts the equilibrium of the elastic forces due to the vital properties of the fluids by ensuring the constancy of the contact pressure.

FIG. 1 shows a device for evaluating the anti-wear properties of liquids; in fig. 2 is a diagram of automatic control of a load unit.

The device comprises a sleeve 2 fixed at the bottom of the cup 1 with two cavities 3 and 4, a plunger 5 and a spring 6 installed in the cavity 3, a second spring 7 installed in the cavity 4 and a check valve 8 placed between the plungers 5 and the counter holder 9 10 the third spring 11, the stops 12 and 13 fixed on the plunger 5, the flexible elements 14 and 15 connecting the stops 12 and 13 with the sleeve 2, the stops 16 and 17 fixed on the screw

18 knot 19 loading; flexible elements - 30 states. Flexible elements 14 and 15

Jin 6 and 11, which moves the plunger 5 in the same direction. The valve 8 passes the fluid through the hole 36 from the cavity 37 into the cavity 3 until

the contact of the counterpiece 10 with the sample 35. The reverse movement of the plunger 5 is impossible, since the valve 8 does not let the liquid flow in the opposite direction. Using the loading unit 19, the contra-sample 10 is pressed against the sample 35 with the required load. The bridge circuit 26 is energized and balanced by its resistance 38. During the wear of the counterpiece 10, the holder 9 under the action of the spring 33 moves to the sample by the amount of wear. The balance of the elastic forces of the springs 6 and 11 and the flexible elements 14 and 15 relative to their original balance is disturbed.

You 20 and 21 connecting the cup 1 with the stops 16 and 17, the sensors 22 and 23 of the movement of the plunger 5, the sensors 24 and 25 of the feedback, electrically restore their balance and move the plunger 5 with the stops 12 and in the opposite direction by a certain amount. Balancing is disturbed.

dininny on bridge circuit 26 (figure 2),, 35 bridge circuit 26, and its output

and an amplifier 27 electrically connected to the latter and an actuator (made in the form of an engine) 28 connected to the load unit. To install the plunger 5 to its original position, the sleeve 2 has a channel 29 and a needle screw 30, and the cup 1 is provided with a stopper 31. The loading unit 19 contains a screw 18, a piston 32 and a spring 33. The arrow 34 is placed on the screw 18 and adjusts the wear of the counter piece 10 and the sample 35. Hole 36 connects cavities 37 and 3. Resistance 38 balances circuit 26.

The device works as follows.

The plug 31 is removed and the screw 30 is turned out by 2-3 turns, as a result of which in the cavity 3 of the sleeve 2 and the cavity of the glass 1 the same pressure of the test liquid is established. Mount the holder 9 of the counterpiece 10 into the cup 1 and sample 35 onto its holder (not shown). Then wait 40

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the signal is fed to the amplifier 27, the actuator (the engine 28 is controlled by a signal from the amplifier 27 and drives the wines of the node 19 to rotate. The piston 32 moves the volume 18 and compresses the spring 33, increasing the compressive load of the sample 35 and the counterpiece 10. In this case, the stops 1 and 17, associated with the screw 18, degrade the flexible elements 20 and 21 and the feedback sensors 24 and 25 before loading the bridge circuit 26.

The ability to provide a constant contact pressure reaches the parameters of the flexible elements 15, 20, 21, sensors 22-25 and the end of sample 10 by boron.

Claims (1)

Formula invented A device for evaluating the opposite properties of pressurized fluids according to ed. St. No. 1298605, restore their balance and move the plunger 5 with stops 12 and 13 in the opposite direction by a certain amount. Balancing is disturbed. bridge circuit 26, and its output 0 five 0 five the signal is fed to the amplifier 27, the Executive mechanism (engine) 28 is controlled by the signal from the amplifier 27 and causes the screw 18 of the node 19 to rotate. The piston 32 moves with the screw 18 and compresses the spring 33, increasing the compression load of the sample 35 and the counterpiece 10. At the same time, the stops 16 and 17, associated with the screw 18, deform the flexible elements 20 and 21 and the feedback sensors 24 and 25 before balancing the bridge circuit 26. The ability to provide constant contact pressure is achieved by selecting the parameters of the flexible elements 14, 15, 20, 21, the sensors 22-25, and the counter-sample 10. Invention Formula A device for evaluating the anti-wear properties of pressurized fluids according to ed. St. No. 1298605, 2.