SU1506318A1 - Bench for endurance testing of couplings - Google Patents

Abstract

The invention relates to mechanical engineering and is intended to conduct endurance couplings testing. The purpose of the invention is to improve the performance characteristics by bringing the test conditions closer to the actual operating conditions of the couplings. The stand includes a housing, two shafts 2 and 3 connected to the housing by means of fixed flanges 5 and 6, and a drive shaft 4. Between the shafts there are mounted coupling halves 10 and 11 of the tested couplings. The shaft 4 is placed in two eccentric bushings 7 and 8 mounted one to another with the possibility of mutual reversal. The outer sleeve 7 is rotatably mounted in the housing and provided with a drive 9. The static loading device includes flanges 5 and 6 rigidly mounted on the shafts and fixed on the case with the possibility of mutual reversal and subsequent fixation relative to the case. The test couplings consisting of two coupling halves are separated by a partition 12 and each coupling half is equipped with a lubrication supply system 13. The drive rotates the eccentric bushing 7. This leads to a cyclic change in the position of the shaft 4. The individual lubricant in each cavity of the coupling allows you to determine the effect of various lubricant components. 1 hp f-ly, 1 ill.

Description

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And tb I eiine relates to machine 1 L1), in particular to the means for testing endurance couplings,

The purpose of the invention is to improve the performance of the stand by providing test conditions that are close to real, and by increasing the productivity of the stand.

The drawing shows a stand for testing endurance sleeves, a cut.

The stand for testing the endurance sleeves contains case 1, fixed (non-driven) shafts 2 and 3 and movable (drive) shaft 4. Shafts 2 and 3 are connected to the case by means of rotary flanges 5 and 6, which perform the function of loading with tv. The drive shaft 4 is placed in two eccentric bushings 7 and 8 mounted one to another, made with the possibility of their mutual reversal. The outer sleeve 7 is mounted in the housing 1 rotatably relative to the axis of its outer cylindrical surface and fitted with a support 9. Test the couplings can be installed : one for shafts 2 and A, one for shafts; 3 and 4. Each test subject includes two pods of 10 and 11 separated by a partition 12 separating the coupling half from one another. Each coupling half is equipped with a separate independent lubricant supply system 13.

The eccentric bushings 7 and 8 are equipped with a fixing unit for mutual reversal, made in the form of a wedge sleeve 14 and a cap nut 15. The bushing sleeve 14 is installed into the gap between the eccentric bushings 7 and 8 and the base nut 15. Swivel flanges 5 and 6 non-driving shaft 2 and 3 may have an arc grooves in which the mounting elements 16.

The stand works as follows

The coupling halves of the tested couplings are installed on shafts 2 and 4 and 3 and 4. Flanges 5b unfold one relative to the other by means of a removable lever with weights or along the limb and are fixed in this position, which ensures loading of the sleeves with a given torque on the shafts. After that, the eccentric sleeves 7 and B unfold one relative to the other, providing a predetermined misalignment of the shaft 4 and the stationary shafts 2 and 3 located in them, then the relative position of the eccentric sleeves is fixed. The actuator 9 is turned on. It rotates the eccentric sleeve 7, which causes a cyclic change in the position of the shaft 4, and the axis of the shaft describes the cylindrical shape. The test couplings installed on their shaft 4 on the shaft 4, located on both sides of the shaft 4, also perform cyclic movements. Their axes describe conical surfaces with a given taper angle, which is determined by the misalignment of the shaft 4 and the shafts 2 and 3. The dependence of the skew angle on the specified value is

one

about arctg,

where 1 - the amount of shaft misalignment

4 and shafts 2 and 3;

L is the distance between the coupling joints

At; ja6oTe stand, lubrication supply systems 13 are turned on, providing individual lubrication of each coupling half 10 and 11 of the subjects.

The proposed stand for testing end sleeves has a high reliability of the test results of couplings by approximating the test conditions to the actual operating conditions of the couplings loaded with a constant torque and mounted on rotating shafts with radially cleared parallel axes.

The presence of a node of mutual reversal of non-drive shafts, fitted with a fixing unit relative to the housing, allows to obtain real characteristics of the wear process and reveal the nature of fatigue damage of such couplings.

In addition, the presence of two flexible couplings makes it possible to double the production capacity of the stand when testing couplings for endurance under the same conditions.

The presence of separate lubrication systems for each half-coupling and the presence of a partition insulating the coupling half from one another, makes it possible to simultaneously test four half-couplings in

5150631

The same conditions of work with different types of lubricants. This makes it possible to reveal the effect of the content of various lubricant components on the wear process, with four times fewer tests, which significantly reduces the time required for tests and halves the cost of manufacturing tests per lx couplings.

formula of invention

Claims (2)

I. Stand for testing 1 and endurance couplings, comprising a housing, a drive, hydraulically driven with it, driven in l, installed through bearings in two, placed one inside the other with possibility. mutual reversal eccentric bushings mounted on the housing by means of bearings, on one end portion of the drive shaft there is a means of fastening the test semi, which is different and 11 so that, in order to improve performance with 0 five 0 five 86 by providing real-world test conditions, it is equipped with two non-driving shafts installed with the possibility of their mutual reversal and fixation relative to the housing, lubrication systems and sealed partitions, as well as additional means of fastening the tested coupling half located on the second end of the drive shaft and the ends of the non-drive shafts facing the drive shaft, and the sealed partitions divide the cavity of the tested coupling halves into two parts, each of which is connected with an independent system lubrication. 2. Stand under item 1, characterized in that it is equipped with a fixing unit of mutual reversal of eccentric bushings, made in the form of a wedge sleeve, placed between eccentric bushings, and cap nut, pressing the wedge sleeve to the eccentric bushings.