RU2256162C1 - Bench for testing gearings according to the scheme of closed circuit - Google Patents

Abstract

FIELD: the invention refers to testing technique.

SUBSTANCE: the test bench has a drive , input shafts for connecting with tested transmissions, output shafts, a loader and a locking device. The test bench has two tested transmissions and the locking device is fulfilled in the shape of gearings firmly connected between themselves and having equal gearing ratio with tested gearings and installed on the input parallel shafts of tested gearings. A calibrated dynamometer clutch connecting two output shafts of tested gearings. serves as a loader.

EFFECT: the invention simplifies and increases productivity of testing.

3 dwg

Description

The invention relates to testing equipment, and in particular to stands for testing mechanical gears, and can be used, in particular, for testing gears in their manufacture or during operation.

A well-known stand for testing gears according to the closed loop scheme (AS No. 868410, publ. 30.09.81). It contains a drive designed to connect to one of the shafts of the gear under test, and a loader made in the form of a flexible shaft, the ends of which are designed to connect to the shafts of the gear under test with the opposite direction of rotation.

This stand can only be used for testing gears with a small load range due to the complexity of manufacturing a flexible shaft.

Closest to the proposed solution is a stand for testing gears in a closed power circuit (AS No. 616547, publ. 25.07.78). It contains a drive, an input shaft for connecting to the tested gears, an output shaft connected to the loader, and a closing device, which is made in the form of a hard drum located on the input shaft, and a friction-associated elastic wheel.

The presence of an elastic wheel in the locking device leads to slippage when a significant force of normal pressure is applied when testing gears, while the elastic wheel is subject to wear.

The present invention solves the problem of increasing the durability of the stand and simplifying the method of loading the test transmission.

To achieve this technical result, the test bench for gears in a closed loop circuit contains a drive, input shafts for connecting to the test gears, output shafts, a loader, two test gears and a closing device, which is made in the form of gears rigidly interconnected, having the same gear ratio with the tested gears and the tested gears installed on the input parallel shafts, with the calibrated dynas being the loader An isometric clutch connecting the two output shafts of the gears under test.

Distinctive features of the proposed stand are the presence of two test gears and a closing device, which is made in the form of gears rigidly interconnected, having the same gear ratio with the tested gears and mounted on input parallel shafts of the tested gears, and the presence of a loader in the form of a calibrated dynamometric gear couplings connecting the two output shafts of the gears under test.

Due to the presence of these signs in the stand, it is possible to discretely change the external moment and measure it and significantly reduce energy costs, which is especially important during long-term wear tests. Due to this, there is no need for electric motors and brake devices (generators or other), the power of which must be sufficient to fully load the tested gear.

The proposed stand for testing gears in a closed loop diagram is illustrated by the drawings shown in figures 1-3.

Figure 1 shows a diagram of a bench for testing gears;

figure 2 - calibrated torque clutch;

figure 3 - coupling in section.

The test bench for gears according to the closed loop scheme (Fig. 1) contains a drive consisting of an electric motor 1 kinematically connected through a belt drive 2 and a closing device in the form of gears 3, 4 (rigidly interconnected and mounted on parallel input shafts 5 , 6) with the tested gears 7, 8, the output shafts of which 9, 10 are connected by a calibrated torque clutch 11.

The calibrated dynamometer clutch 11 (Figs. 2, 3) consists of two half-couplings 12, 13, which are seated on the ends of the connected output shafts 9, 10 by means of a spline connection and elastic elements - steel springs 14 (the number of which can be from 2 to 8, t .e. even number is desirable to eliminate coupling imbalance). The springs 14 are installed in the slots of the coupling 11, located in diameter at its hubs and serve to eliminate distortions of the output shafts 9, 10, as well as the calibration of the coupling. In addition, a calibrated scale 15, a pointer arrow 16 and a locking device 17 are fixed to the coupling.

Stand for testing gears according to the closed loop scheme works as follows.

The electric motor 1 through the V-belt drive 2 and the gears 3, 4 drives the input shafts 5, 6 and, therefore, the tested gears 7, 8 with a calibrated torque clutch 11.

Using a torque clutch 11 is the magnitude of the torque supplied to the circuit, as well as the regulation of its magnitude. Thanks to the calibration of the clutch 11, it is possible to set any load moment on it by turning one coupling half relative to the other, which is fixed by the locking device 17. Having fixed the load moment on the dynamometer clutch, the gears are tested.

The proposed stand is easy to operate, allows you to experience two gears at the same time.

Claims (1)

A stand for testing gears in a closed power circuit, comprising a drive, input shafts for connecting to the test gears, output shafts, a loader and a closing device, characterized in that the stand contains two test gears, and the closing device is made in the form of gears rigidly connected among themselves, having the same gear ratio with the tested gears and installed on the input parallel shafts of the tested gears, while the loader is the tariff bathroom dynamometer clutch connecting the two output shafts of the test gears.

Images