CN110887589B

CN110887589B - Method for measuring friction torque of bearing during rotation

Info

Publication number: CN110887589B
Application number: CN201911228089.6A
Authority: CN
Inventors: 华敏奇; 蒋银鑫; 孙晓晓
Original assignee: Lanzhou Huahui Instrument Technology Co ltd
Current assignee: Lanzhou Huahui Instrument Technology Co ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2021-08-17
Anticipated expiration: 2039-12-04
Also published as: CN110887589A

Abstract

The invention relates to a method for measuring friction torque of a bearing during rotation, which comprises the following steps: the method comprises the steps of arranging a bearing sleeve to be tested on a transmission shaft linked with a high-speed servo motor; clamping and fixing a bearing to be tested through a bearing to be tested fastening tool I and a bearing to be tested fastening tool II; clamping and fixing another bearing to be tested; fourthly, separating the two assembled bearings to be tested by using a check ring, then assembling the two assembled bearings to be tested into a bearing sleeve to be tested, and fixing the two sides by using end covers of the bearings to be tested; fifthly, contacting the blocking sheet arranged on the bearing sleeve to be tested with the contact pin of the force transducer; sixthly, transmitting the friction torque generated by the rotation of the bearing to be measured to a force measuring sensor, namely measuring the friction torque generated by the rotation of the bearing to be measured. The bearing to be tested is a test bearing and a supporting bearing, so that the bearing to be tested is more in line with the actual working condition, and the influence of the supporting bearing on the test result is eliminated.

Description

Method for measuring friction torque of bearing during rotation

Technical Field

The invention relates to the field of bearing performance testing, in particular to a method for measuring friction torque of a bearing during rotation.

Background

The friction torque when the bearing rotates is measured by adopting a single bearing, one of the measuring methods is that the inner ring rotates and the outer ring is used for measuring, but the outer ring measuring device needs a support, so that a bearing except for the bearing to be measured is added for supporting, and the error of the bearing measurement is increased. The second measurement method is to install a dynamic torque sensor on the rotating shaft to measure the friction torque of the bearing during rotation, but the dynamic torque sensor cannot bear load in the axial direction, so that a support bearing needs to be added on the rotating shaft, and the test result can be influenced.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for measuring friction torque of a bearing during rotation, which can eliminate measurement errors.

In order to solve the above problems, the method for measuring the friction torque of the bearing during rotation according to the present invention comprises the following steps:

the method comprises the steps of arranging a bearing sleeve to be tested on a transmission shaft linked with a high-speed servo motor;

clamping and fixing a bearing to be tested through a bearing to be tested fastening tool I and a bearing to be tested fastening tool II;

clamping and fixing the other bearing to be tested according to the steps;

fourthly, separating the two assembled bearings to be tested by using check rings, then assembling the two assembled bearings to be tested into the bearing sleeve to be tested, and fixing the two sides of the bearing sleeve to be tested by using end covers of the bearings to be tested;

fifthly, contacting the blocking sheet arranged on the bearing sleeve to be tested with the contact pin of the force transducer;

sixthly, transmitting the friction torque generated by the rotation of the bearing to be measured to a force measuring sensor, and measuring the friction torque generated by the rotation of the bearing to be measured.

And in the step II, a taper hole is formed in the bearing fastening tool I to be tested and the bearing fastening tool II to be tested, and the taper hole is matched with the conical surface at one end of the transmission shaft.

Compared with the prior art, the invention has the following advantages:

1. the bearing fastening tool I to be tested and the bearing fastening tool II to be tested are provided with the taper holes, the taper holes are matched with the conical surfaces at one end of the transmission shaft, and through the matching of the conical surfaces of the two taper holes, the bearing can be driven to rotate through the friction force between the conical surfaces, and meanwhile, the bearing assembly to be tested can be ensured to be concentric with the transmission shaft.

2. Although the invention is also used for measuring the force of the outer ring, a pair of bearings is used, the bearing to be measured is a test bearing and a supporting bearing, the bearing to be measured is more in line with the actual working condition, and the influence of the supporting bearing on the test result is eliminated.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is an elevational view, in cross section, of a bearing assembly under test of the present invention.

FIG. 2 is a top cross-sectional view of a bearing assembly under test of the present invention.

FIG. 3 is an axial force diagram of the bearing to be tested according to the present invention.

FIG. 4 is a schematic diagram of the friction torque of the bearing assembly under test of the present invention.

In the figure: 1-bearing to be tested; 2, bearing sleeves to be tested; 3, a check ring; 4, fastening a bearing to be tested by using a tool I; 5, fastening a bearing to be tested by using a tool II; 6, bearing end cover to be measured; 7-transmission shaft.

Detailed Description

As shown in fig. 1-2, a method for measuring friction torque of a bearing during rotation comprises the following steps:

arranging a bearing sleeve 2 to be tested on a transmission shaft 7 linked with a high-speed servo motor;

clamping and fixing a bearing to be tested 801 through a bearing to be tested fastening tool I4 and a bearing to be tested fastening tool II 5; the bearing fastening tool I4 to be tested and the bearing fastening tool II 5 to be tested are provided with taper holes, and the taper holes are matched with the conical surface at one end of the transmission shaft 7;

the other bearing 1 to be tested is clamped and fixed in the steps;

fourthly, separating the two assembled bearings 1 to be tested by using a check ring 3, then assembling the two bearings 1 to be tested into the bearing sleeve 2 to be tested (the bearings 1 to be tested and the like are assembled into the bearing sleeve under the condition that a bearing disassembling and assembling tool is needed to assist), and fixing the two sides by using bearing end covers 6 to be tested;

fifthly, contacting the blocking sheet arranged on the bearing sleeve 2 to be tested with the contact pin of the force transducer;

sixthly, oppositely applying loads to the two transmission shafts 7 with the same rotating speed, and transmitting the friction torque generated by the rotation of the bearing 1 to be measured to a force transducer, namely measuring the friction torque generated by the rotation of the bearing 1 to be measured.

The working principle is as follows: as shown in fig. 3 to 4, a pair of bearings 1 to be measured are adopted to measure simultaneously, the inner ring rotates, and the two transmission shafts 7 apply loads F in opposite directions, so that the loading forces applied to the two bearings 1 to be measured are consistent. The two shafts are driven by the two high-speed motors to rotate at the same speed respectively, so that the motion states of the two bearings 1 to be tested are consistent. The outer rings of a pair of bearings 1 to be measured are connected together, and friction torque is measured on the outer rings, wherein the measured force is the friction torque of the two bearings 1 to be measured.

When the inner ring of the bearing 1 to be measured rotates, the inner ring and the outer ring have friction force, so that the outer ring can be driven to rotate, or the outer ring has a rotation trend, and the outer ring is fixed in the bearing sleeve 2 to be measured 2, so that the friction force of the inner ring and the outer ring drives the bearing sleeve 2 to be measured to move, or the bearing sleeve 2 to be measured has a movement trend, and the bearing sleeve 2 to be measured is in contact with the contact pin of the force transducer, so that the force transducer can measure the friction force of the inner ring and the outer ring when the bearing 1 rotates.

Since the force measuring point of the force measuring sensor is on the baffle, the measured force is F1, the bearing friction force F is on the contact point of the ball and the inner and outer rings of the bearing, the radius of the contact point of the bearing is r, the distance between the axis and the contact point of the baffle is L, F1L = F r, F = F1L/r is known according to the moment balance principle, and at the moment, F is the friction force of two bearings, so that the single bearing friction force is F = F1L/r 2), and the friction coefficient is mu = F/F = F1L/r 2F.

Claims

1. A method of measuring friction torque as a bearing rotates, comprising the steps of:

the method comprises the steps of arranging a bearing sleeve (2) to be tested on a transmission shaft (7) which is linked with a high-speed servo motor;

clamping and fixing a bearing (1) to be tested through a bearing fastening tool I (4) to be tested and a bearing fastening tool II (5) to be tested; the bearing fastening tool I (4) to be tested and the bearing fastening tool II (5) to be tested are provided with taper holes, and the taper holes are matched with the conical surface at one end of the transmission shaft (7);

clamping and fixing the other bearing (1) to be tested according to the steps;

fourthly, separating the two assembled bearings (1) to be tested by using a check ring (3), then assembling the two assembled bearings to be tested into the bearing sleeve (2) to be tested, and fixing two sides by using bearing end covers (6) to be tested; the bearing (1) to be tested is a test bearing and a support bearing;

fifthly, contacting a blocking sheet arranged on the bearing sleeve (2) to be tested with a contact pin of a force transducer;

sixthly, oppositely applying a load F through two transmission shafts (7) to ensure that loading forces borne by two bearings (1) to be tested are consistent; and transmitting the friction torque generated by the rotation of the bearing (1) to be measured to a force transducer, namely measuring the friction torque of the bearing (1) to be measured during the rotation.