Rolling bearing no-load starting torque measuring device

Abstract

The invention provides a rolling bearing no-load starting torque measuring device. The device comprises a rotating motor, a bearing seat, a measured bearing, a measuring mandrel, a coupling and a sensor, wherein the rotating motor is fixed on a rack; the cylindrical outer surface of the lower end of the bearing seat is connected with an output shaft of the rotating motor; an inner hole of the bearing seat is fixed to an outer ring of the measured bearing; the bottom of the measuring mandrel is connected with the measured bearing; the measuring mandrel is matched with the inner surface of an inner ring of the mandrel bearing and is fixed through a friction force between the measuring mandrel and the measured bearing; the upper part of the measuring mandrel is connected with the spring coupling through a connecting mechanism; and the spring coupling is connected with the torque sensor. The conical measuring mandrel is simple in structure, low in machining precision requirement and low inmachining difficulty, so that the detection cost can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of bearing detection and relates to a measuring device for no-load starting torque of a rolling bearing. Background technique [0002] The basic type of rolling bearing is composed of an inner ring with a raceway, an outer ring, rolling elements, and a cage. It has the characteristics of compact structure, small friction torque, and high speed. It is widely used in aerospace, engineering machinery, trucks, water conservancy, etc. facilities etc. Depending on its structure and type, it can bear radial loads, axial loads, or combined radial and axial loads. The installation requirements of rolling bearings are that, while ensuring the radial load carrying capacity, the bearings can withstand as large an axial force as possible, so as to ensure that the starting torque and rotation flexibility of the bearings are not affected. [0003] At present, when measuring, the rotating motor rotates to drive the mandre...

AI Technical Summary

Problems solved by technology

The main problem of this measurement method is that in order to ensure that the outer ring of the bearing is stationary, the friction force between the pressure block and the bearing outer ring should be large enough, which requires the mass of the pressure block to be large enough to ensure that the friction force is large enough

The pressure block will generate a certain axial force on the bearing, so that the actual measured starting torque is not completely unloaded, but the starting torque measured under the action of a certain axial force. The size of the axial force is The gravity of the briquette, so the no-load starting torque measured by the measuring device is not the real no-load starting torque

At the same time, because the fixing between the inner ring and the mandrel is realized by tightening the nut, if the tightening torque is not properly controlled, it will cause certain pressure damage to the inner ring of the bearing

Images