SU1262324A1 - Rig for testing identical transmissions - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to testing equipment, and can be used in testing in a closed loop circuit of two identical gears, mainly bevel and worm gears. The aim of the invention is to simplify the stand design by reducing the number of locking transmissions. One of the wheels of the trailing gear is fixed on the differential case. This gear has a gear ratio of 1: 2. A power pathogen is associated with one of the center differential wheels. The load is set by the program-controlling device according to the (L signal of the tachogenerator). The load accuracy is provided by supplying it to the high-speed driving gears of the tested gears. It is possible to stop the stand during sudden load changes. 1 Il.

Description

to

4 The invention relates to mechanical engineering, in particular to testing equipment, and can be used for testing according to the scheme of a closed loop of two identical gears, mainly bevel and worm gears. The purpose of the invention is to simplify the design of the stand by reducing the number of locking gears while ensuring identical conditions and mode of operation. The drawing shows a general scheme of the stand when testing two bevel gears. The proposed stand includes haying 1, drive 2, symmetrical differential 3, closing gear with a gear ratio of 1: 2, wheel 4 of which is fixed to the differential case 3, Wheel 5 by shaft 6. Coupled with drive 2, and drive shaft 7 - with high-speed shaft the first test gear 8, the central wheel 9 e1 “and the gear 3 is kinematically connected with the force actuator, for example a hydraulic cylinder 10, and the central wheel 11 via a propeller shaft 12 having a torque sensor 13. connects to the high-speed shaft of the second test gear 14, the connecting elements 15 serve for the kinematic connection of the low-speed shafts of the tested gears 8 and 14, the Stand also contains a tachogenerator 15 mounted on the low-speed shaft of the test gear, for example transfer 8, and software-control device 16 The stand works as follows. When assembling the tested gears 8 and 14 glasses of bearings leading the neck. Terrain on high-speed shafts I must be installed so that the channels 1dl of oil supply for both gears are at the top, and the channels for draining mayal, filled in the bearing cups of the driving gears, are at the bottom, which will provide the conditions for lubricating the gears of the gears and since the driving gears of the tested gears 8 and 14 have equal angular speeds, both gears will work under the same conditions. A test program is being developed by means of which the software and control device 16 sets the level and sequence of 1,242 changes in test modes (changes in the speeds of the leading high-speed shafts of the tested gears 8 and 14 and the torque in a closed loop). The software-controlled device 16 turns on the drive 2 and sets, according to a predetermined program, the number of wheel revolutions 5 and, respectively, the driving gears of the tested transmissions 8 and 14, and the tachogenerator 15 is a feedback feedback sensor. The torque level in the closed loop is set by the signal of the program-controlling device 16 by turning the central wheel 9 of the differential 3, kinematically connected with the rod of the hydraulic cylinder 10. At the same time, the torque sensor 13 connected electrically to the program-controlling device 16, It is a torque feedback sensor in a closed loop. The torque is changed according to the test program. Due to the fact that the torque is supplied to the high-speed driving gears of the tested gears 8 and 14, the loading level can be set with sufficient accuracy, and due to the speed of the hydraulic cylinder 10, it is sufficient to withstand the level change modes loading. The torque generated in the circuit by turning the central wheel 9 is divided by differential 3 into two streams. One power flow is fed through the central wheel 11 and the drive shaft 12, the drive high-speed gear of the test gear 14, the second power flow through the gears 4 and 5, the shaft 6, the drive shaft 7 is fed to the drive high-speed gear of the gear drive 8. As the drive speeds The gears of the tested gears 8 and 14 are equal, the lubrication conditions are identical, and the n-gears work under the same conditions. Software control unit 16 provides for an immediate stop of the stand when there is a sharp change in torque in a closed loop, claims Stand for testing two identical gears along a closed loop circuit

pa, which contains a drive, a metric differential, a power pathogen, a locking gear and connecting elements, characterized in that, in order to simplify the design, the gear ratio of the locking gear is 1: 2, one of its wheels is fixed on the differential case, the other is drive related and is intended for kinematic

262324 4

connections with the high-speed shaft of one of the tested gears, one of cent. Differential wheels are connected to a power driver, another 5 is intended for kinematic connection with the high-speed shaft of another test gear, and connecting elements are intended for kinematic connection of low-speed shafts 10 of the tested gears with each other.

About 5

"6

Claims (1)

Claim A test bench for two identical gears in a closed circuit3, containing a drive, a symmetric differential, a power exciter, _t closing gear and connecting elements, characterized in that, in order to simplify the design, the final gear ratio is 1: 2, one of its wheels is fixed on the differential housing, the other is connected to the drive and is intended for kinematic connection with the high-speed shaft of one of the tested gears, one of which is cent. The differential wheels are connected with a power exciter, another one is designed for kinematic connection with the high-speed shaft of another test gear, and connecting elements are used for kinematic - connecting slow-moving shafts of 10 test gears to each other.