SU1530963A1 - Testing bench - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to test stands of friction clutches of vehicles with a closed power circuit. The purpose of the invention is to improve performance by providing multi-stage load control. The test stand for friction clutches consists of a drive 1 and an elastic sleeve 2, connected to a closed power circuit of inertial masses 3-12, mounted on shafts of angular bevel gears 13-16, as well as on shafts 17 and 18 with connecting elements with a lead 19 and driven by the 20 shafts of the tested friction clutch 21. The drive 19 and the driven 20 shafts are loaded with two identical load circuits with chain drives 22-14 and 25-27 and with a gear ratio equal to one. The change of the moment of inertia of the stand can be accomplished by removing the required number of inertial masses 3-12, completely disconnecting one of the closed power circuits by removing the chains 22.24 or 25.27 or disconnecting one of the angular gears 13-16 by removing the chains 23 26. At the same time one of the power closed circuits must be saved. 1 il.

Description

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13-16, as well as on the shafts 17 and) 8 with elements of connection with the lead 19 and the driven 20 shafts of the tested friction clutch 21. The leading 19 and the driven 20 shafts are loaded with two identical load circuits with chain drives 22-24 and 25-27 and with a gear ratio equal to one. The change of the moment of inertia of the stand can be carried out by

remove the required number of inertial masses 3-12 by completely disconnecting one of the closed power circuits by removing the chains 22, 24 or 25, 27 or disconnecting one of the angular gears 13-16 by removing the chains 23, 26. One of the power closed circuits must be saved. 1 il.

The invention relates to the field of mechanical engineering, in particular to test stands of friction clutches of vehicles with a closed power circuit.

The purpose of the invention is to improve performance by providing multi-stage load control.

The drawing shows the scheme of the stand.

The test stand for friction clutches consists of a drive 1 and an elastic sleeve 2, connected to a closed power circuit of inertial masses 3-12, mounted on shafts of angular bevel gears 13-16, as well as on shafts 17 and 18 with connecting elements with a lead 19 and driven by the 20 shafts of the tested friction clutch 21. The leading 19 and the driven 20 shafts are loaded with two identical loading circuits. The first is formed by chain drives 22-24, connecting the drive 19 and driven 20 shafts with the shafts of the gearboxes 13 and 16, as well as the gearboxes 13 and 16 between them. The second closes the leading 19 and the driven 20 shafts by chain drives 25-27 through gears 14 and 15. The gear ratio of both closed power loading circuits is one.

In order to diagnose the tested friction clutch 21, the locomotives 28 and 29 are mounted on the drive 19 and the driven 20 shafts. The amount of the frictional moment that occurs during the slip is measured by the meter 30.

The distribution of inertial masses of 3–12 along two power closed loops contributes to the reduction of specific loads on the bearing units of the stand.

The change of the moment of inertia of the stand can be made by removing

the required number of inertial masses 3-12 by completely disconnecting one of the closed power circuits by removing the chains 22, 24 or 25, 27, and also by disconnecting one of the angular conical gears 13-16 from the chains 23 and 26 from the shafts of the gears 13-16 . At the same time, carried out permutations must retain at least one power closed loop. Drive 1 stand can be connected to any of the shafts of inertial masses 3-12.

The test stand for friction clutches operates as follows.

When the tested friction clutch 21 is turned on, the drive 1 through the elastic clutch 2 accelerates the inertial mass 3 located on the drive shaft 19 of the friction clutch 21. At the same time, the rotation is transmitted to the driven shaft 20 through two closed power circuits as follows. The first closed loop: from the drive shaft 19 through a chain drive 22, a gearbox 13, a chain drive 23, a gearbox 16, a chain gear 24 to the driven shaft 20. A second closed loop: from a drive shaft 19 through a chain gear 25, gearbox 14, chain gear 26 gearbox 15, chain transmission 27 to the driven shaft 20. Since inertial masses 4-7, 9-12 are installed on the output shafts of gearboxes 13-16, they are also driven by rotation 1 of drive 1.

The use of angular bevel gears provides the rotation of the driven shaft 20 in the direction opposite to the rotation of the drive shaft 19.

While maintaining the gear ratios of the chain drives 22-24, 25-27 and gearboxes 13-16 equal to one, the frequency of rotation of the driven shaft 20 is equal to the frequency of rotation of the driving shaft 19.

The relative speed of rotation of the drive 19 and the driven 20 shafts, respectively, is twice as high. Thus, while maintaining a given speed of slipping, the angular speeds of the driving and driven parts of the tested friction clutch can be reduced by two times.

An increase in the frequency of rotation of the drive 1 causes a twofold increase in the relative speed of rotation of the drive 19 and the slave 20 shafts of the test clutch 21, and therefore a corresponding increase in the slipping operation for one clutch engagement, which reduces the test time for friction clutches on the stand.

When the lead 19 and the slave 20 shafts reach the required relative speed, the drive 1 is turned off and the test sleeve 21 is turned on. The clutch 21 is slipped. During the slipping process, the drive 19 and the follower 20 shafts of the friction clutch 21 and the kinematically associated inertial masses 3-12 slow down themselves to a full stop or to a given speed of slipping.

the cycle is repeated. The moment of friction arising during the slipping period is perceived by the gauge 30. The remaining parameters from the friction clutch are removed with the help of current collectors 28 and 29.

Claims (1)

Invention Formula 0 Test bench containing an actuator connected to a power closed loop in the form of parallel-connected branches, consisting of a shaft with with elements for connection with the drive shaft of the tested node, additional shaft with elements for connection with the driven shaft of the test node, as well as of kinematically connected with 0 driven and the said shafts of the loading circuit, characterized in that, in order to improve performance by providing multi-stage regulation 5 loads, it is provided with an additional loading circuit with fastening elements on the input and output shafts of the test unit, kinematically connected with the drive shaft.