RU226182U1 - Contact endurance testing device - Google Patents

Abstract

The utility model relates to mechanical engineering, in particular to devices for testing materials for contact endurance to obtain contact fatigue characteristics of materials. A device for testing the contact endurance of a cylinder-plane rolling pair during reciprocating movement without slipping includes a screw press with a base plate fixed to its base, on which a rail guide, a stator of a linear synchronous electric motor, an optical ruler housing, and a carriage made with the possibility of reciprocating movement along a rail guide, and made with the possibility of fixing a flat sample, on the carriage, through the plate, a motor armature, made with the possibility of forming an alternating magnetic field, and an optical ruler slider are fixed, on a screw press, through the base plates, a mandrel is fixed , a torque clamp is installed between the press rod and the mandrel to control the load, and a rolling bearing in a cage is installed in the mandrel. The technical result is the elimination of the noted shortcomings and increasing the accuracy of reproducing the operating conditions of certain types of reciprocating mechanisms.

Description

The utility model relates to mechanical engineering, in particular to devices for testing materials for contact endurance to obtain contact fatigue characteristics of materials.

The purpose of the utility model is to expand the available methods for testing materials for contact endurance.

A known laboratory stand RU 2726255 contains a base on which an electric motor is installed, connected through an elastic-compensating coupling to a counter sample shaft installed in a split housing of the testing machine. A cylindrical sample is installed on this shaft. Lubrication is carried out using the crankcase method. A cylindrical shaft of the test sample is installed in the second part of the split housing. The load is carried out by a screw mechanism through a ball directly onto the holder in which the shaft of the test sample is installed. There is an electronic dynamometer between the ball and the cage. The moment of failure is recorded by increasing the oscillation of the loading force on a given dynamometer.

The disadvantage of this device is the impossibility of testing the cylinder-plane rolling pair, which is found in some mechanisms that convert rotary motion into reciprocating motion and in roller rail guides.

The prototype is a device for testing contact endurance RU 2357230, a base on which flat samples are mounted, and a mandrel with a Morse taper into which cylindrical rolling elements are installed.

The disadvantage of this device is that the samples are loaded only in one direction of rotation, which does not allow one to reproduce with acceptable accuracy the operating conditions of some mechanisms, where the cylinder, rolling along a plane, makes a reciprocating motion.

The technical result is the elimination of the noted shortcomings and increasing the accuracy of reproducing the operating conditions of certain types of reciprocating mechanisms.

The technical result is achieved by the fact that a carriage moves on the installed profile rail of the installation, to which the armature of a linear synchronous electric motor is attached, thereby realizing the possibility of reproducing the reciprocating movement of a flat sample mounted on the carriage. The rolling bearing located in the cage will be rolled according to the sample, thereby ensuring the absence of slipping in the rolling bearing-sample pair.

A device for testing the contact endurance of a cylinder-plane rolling pair during reciprocating movement without slipping includes a screw press 1 with a base plate 2 fixed on it, on which a rail guide 3, a stator of a linear synchronous electric motor 4, and an optical ruler housing 5 are mounted. A carriage 6 moves along the rail guide, onto which the motor armature 8, the slider of the optical ruler 9 and the flat sample 10 are attached through the plate 7. A mandrel 12 is attached to the screw press through the base plates 11. A torque clamp 13 is installed between the press rod and the mandrel to control the load. In the mandrel 12, a rolling bearing 14 is installed in a cage 15.

A device for testing the contact endurance of a cylinder-plane rolling pair during reciprocating movement without slipping operates as follows.

Before starting operation of the device, it is necessary to align the base plate on which the rail guide is installed relative to the mandrel with the bearing, so that clean rolling is realized during operation. This plate is attached to the base of the screw press. The armature of the electric motor is attached to the carriage. With the help of a driver, an alternating magnetic field is formed in the armature and due to this the armature can move along the stator. In this way, you can adjust the movement so that the anchor performs a reciprocating movement with the specified characteristics. A flat sample is attached to the carriage through the plate. The load is set using the screw press handle and is controlled thanks to a torque clamp installed between the mandrel and the press rod. A rolling bearing is installed in the mandrel, on which a race is installed, for proper operation of the bearing.

Claims (1)

A device for testing the contact endurance of a cylinder-plane rolling pair during reciprocating movement without slipping includes a screw press with a base plate fixed to its base, on which a rail guide, a stator of a linear synchronous electric motor, an optical ruler housing, and a carriage made with the possibility of reciprocating movement along a rail guide and made with the possibility of fixing a flat sample, on the carriage, through the plate, a motor armature made with the possibility of forming an alternating magnetic field, and an optical ruler slider are fixed, on a screw press, through the base plates, a mandrel is fixed, A torque clamp is installed between the press rod and the mandrel to control the load, and a rolling bearing in a cage is installed in the mandrel.