SU1518698A1 - Bed for testing the pulling winch - Google Patents

Abstract

This invention relates to railway transport. The purpose of the invention is the expansion of the technological capabilities of the stand. The test bench for winch 1 contains a drive 2, a hydraulic unit 3, a loading device 4 with a loader 31, a drum 28 and a treadmill 5, as well as a mechanism 6 for wrapping the cable 33 with a driving drum 39. The hydraulic brake 25 and the suction pump 24 are included in the hydraulic unit 3 stand A drive pump 12 is kinematically coupled to the drive engine 7. Between the engine 7 and the winch 1, a friction clutch 13 of hydraulically controlled clutch is installed. On a signal from the pressure switch 18, the hydraulic distributor 15 controls the activation of the clutch 13. The pressure relay 17 gives a signal to the hydraulic distributor 16 to turn off the disc brake 25. The loading device 31 is designed as a dynamometric powder electromagnetic brake. 1 il.

Description

one

(21) 4263050 / 40-11

(22) 16.06-87

(46) 30-10.89. Bullet number 40

(72) G.M. Rosenfeld, V.B.Lukin

and A.EoHurwitz

(53) 62i 05 (088 8)

(56) USSR Author's Certificate No. 1291836, cl. G 01 M 19/00, 1983,

(54) TRAIN WINCH TEST BENCH

(57) The invention relates to railway transport. The purpose of the invention is the expansion of the technological capabilities of the stand. The test bench for winch 1 contains a drive 2, a hydraulic unit 3, a loading device 4 with a loader 31, a drum 28 and a treadmill 5, as well as a mechanism 6 for wrapping the cable 33 with a driving drum 39 "Hydraulic brake 25 and a suction pump 24 are included in Hydraulic unit 3 stand With drive engine 7 kinematically coupled forcing pump 12, Hydraulic control clutch friction clutch 13 is installed between engine 7 and winch 1 Hydraulic distributor 15 controls the activation of clutch 13 pressure signal 18 from pressure relay 18 and gives a signal to the control valve 16 to turn off the brake disk 25 Nagruzhatel vsholchen 31 in the form of an electromagnetic brake torque poroyzhovogo yl about 1

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This invention relates to a winch test bench.

The purpose of the invention is the expansion of the technological capabilities of the stand.

The drawing shows a hydrokinematic scheme of the test bench for a pull winch.

The bench for testing a winch 1 contains a drive 2, a hydrostatic unit 3 with a control unit, adjusting and controlling the hydraulic system of the tested winch 1, a loading device 4 with a torsioner 5 and a tipping mechanism 6

The drive 2 contains an asynchronous motor 7, which is connected via gears 8 and 9, as well as a telescopic 10 and cardan 11 shafts to the drive shaft of the test head. The engine 7 is kinematically connected to the pressure pump 12, and between the engine 7 and winch 1 a friction clutch is installed Hydraulically controlled clutch 13

The stand 8 hydro installation contains a tank 14 with a working fluid, equipped with an electric heating system and automatic temperature control of the working fluid (not shown) Control and distribution equipment is installed on the tank: valves 15 and 16, pressure relay 17 and 18, flow meters 19 and 20, bilge pump 21, pressure spools 22 and 23 o The hydrokinematic scheme of the stand includes a bilge pump 24 and a hydraulic disc brake 25. Pressure relay 18 and distributor 15 pressure relay 17 and distributor 16 are connected electrically and lines 26 and 27, respectively, included in the automatic control system of the stand.

The loading device 4 contains a drum 28, which through gear 29, a gearbox 30 and a loader 31 is connected to a direct current motor 32. The loader 31 is designed as a dynamometric electromagnetic powder brake acting as a force generator on cable 33. The tacho generator 34 is designed to control engine speed 32.

Tractor 5 contains a spindle 35, through gears 36 and 39 kinematically connected to the drum 28, and a nut 37 mounted on it, carrying the Guide block 38 for

0 5

about

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five

of the cable 33 "The gear ratio of the teeth is the same (x pairs 36 and 29 and the steps of winding on the drum 28 and the threads on the screw 35 are chosen so that during the operation of the stand, the cable is normally laid on the drum

The mechanism 6 for wrapping the cable contains an additional drive drum 39, via gear 40 and gearbox 41 connected to the engine 42. The drum 39 is identical to the drum 28 of the loading device 4 and is installed parallel to it Tachogenerator 43 is designed to control the speed of the engine 42 "

Before work, the tested traction winch is installed and secured on the stand. After that, the drive shaft of the winch is connected with a 2-drive drive shaft 11 to the pump 24 and the hydraulic disc brake 25 are connected to the pipelines of the hydraulic installation of 3 stands. The oil in tank 14 must be preheated to the set temperature.

The stand can operate in three modes: cable sheathing; test (running) winch idle; Test winch under load.

Stand in the mode of cable wrapping works as follows

The end of the cable 33 of the measured length is fixed on the drum 28 of the loading device 4 and is wound on it with the help of the motor 32. Then the free end of the cable 33 is fixed on the drum 39 of the cable trimming mechanism 6 of the cable trimming cable 6, and the cable 33 is rewound from the drum 28 of the loading device onto the drum 39 of the cable wrapping mechanism. In this case, the normalized force on the cable 33 is set by the electromagnetic powder brake 31. After the tROS 33 is completely rewound to the drum 39 of the cable-covering mechanism 6, a signal is given to turn off the engine 42 and the electromagnetic jump-type load brake 31 of the loading device. the rewind is performed by the electric motor 32. The number of wrapping cycles and wrapping relays are controlled by the stand control system. After the cable is trimmed, a winch test is performed.

51

Stand in the mode of isgP) ggani winch idling works as follows

The winch can operate in the mode of issuing and winding the cable. To control the modes, use the winch reverse control mechanism mounted on the stand control panel (not shown). Before starting the winch test, the winch reverse control mechanism should be set to the Winding position. Then, the free end of the cable 33, wound on the drum 28 of the loading device 4, is fixed on the drum of the test winch 1. Then the engine 7 of the drive 2 is turned on, on the shaft of which the pressure pump 12 is installed. The oil 14 of the hydraulic unit 3 goes to the pump 12 and it is supplied under pressure settings of the pressure slide valve 22 to the distributors 15 and 16. Under pressure settings of the pressure slide valve 23, the oil is supplied to the lubricant of the gearbox 2. The oil is pumped out of the gearbox of the drive 2 by a pump 21, the engine of which turns on dnovremenno the drive motor 7 February.

After securing the cable 33 on the drum of the test winch 1 and turning on the engine 7 of the drive 2, the winch is tested. The distributor 16 is switched, the oil from the pump 12 enters the hydraulic disc brake 25, and the drive shaft of the winch drive is released. After the pressure in the hydraulic cylinder of the brake 25 reaches a predetermined value, the pressure relay 18 is activated and the signal from it arrives at the solenoid 15 of the distributor. The latter is activated and the oil enters the hydraulic clutch 13 of the drive coupling 2 "The clutch is activated. The rotation from the engine 7 is transmitted via the kinematic chain of the drive 2 and the winch 1 to the winch drum. The winding of the cable 33 onto the drum starts.

After the cable 33 has been completely rewound from the drum 28 of the loading device to the winch drum 1, the control system switches the distributor 15, and the oil from the hydraulic clutch friction clutch 13 goes to drain into the 1Ao tank. The pressure on the hydraulic clutch control line 13 drops o The pressure relay 17 operates and delivers signal to the electromagnet of the distributor 16, with re986

The keymegia of which the oil from the hydraulic disc brake 25 is applied to the drain by the action of its springs and the winch is braked.

In order to rewind the cable 33 from the winch drum 1 onto the drum 28 of the loading device 4, the winch reverse control mechanism is set to the Issue position and a signal is given. The distributor 16 "The stand hydraulic system works in the indicated order before the hydraulic friction clutch 13 is activated coupling. At the same time with the inclusion of the clutch 13, the control system automatically starts the engine 32 of the loading device 4. The drum 28 is driven to rotate. The winding of the cable 33 onto the drum 28 and its laying begin via wirerope layer 5,

After the cable 33 from the winch drum 1 is completely rewound to the drum 28, the engine 32 of the loading device 4 is disconnected by a control system signal and hydraulic system elements operate, in the indicated order switching off the hydraulic clutch friction clutch 13 and activating the hydraulic winch disc brake 25

Stand in test mode winch under load works as follows

The stand operation under load is similar to the stand work idle, but when the cable 33 is wound on the winch drum on the cable, the normalized force is set by means of a dynamometric electromagnetic powder brake 31.

The processes of wrapping the cable and testing the winch are automated. The force on the cable in the process of trimming and testing the winch can be changed according to a given program also in automatic mode in accordance with the technical conditions for testing.

Claims (1)

Invention Formula 1 о Test bench for a traction winch, containing an engine-driven drive with an engine, a brake, a loading device with a driving drum and a load box, a booster pump and hydraulic distributors, which distinguishes In order to expand the technological capabilities of the stand, it is equipped with a pressure switch and a friction clutch installed in the kinematic chain between the engine and the output drive shaft, while the friction clutch and brake are hydraulically controlled through the mentioned hydraulic distributors and pressure switch, wherein the pressure relay in the friction clutch circuit is electrically connected to the hydraulic distributor the brakes, and the pressure relay in the brake circuit is electrically connected to the G distributor of the friction muffler, while the injection pump is kinematically connected with the said engine in 2 "Stand pop. 1, which differs from the fact that it is equipped with an additional drive drum for covering the cable, and the loader is made in the form of a dynamometric electromagnetic powder brake