阅读说明：本技术 一种测量轴承旋转时的摩擦扭矩的方法 (Method for measuring friction torque of bearing during rotation ) 是由 华敏奇 蒋银鑫 孙晓晓 于 2019-12-04 设计创作，主要内容包括：本发明涉及一种测量轴承旋转时的摩擦扭矩的方法,包括以下步骤：⑴将待测轴承套置于与高速伺服电机链接的传输轴上；⑵通过待测轴承紧固工装Ⅰ与待测轴承紧固工装Ⅱ将一个待测轴承夹装固定；⑶按步骤⑴~⑵将另一个待测轴承夹装固定；⑷将两个装好的待测轴承用挡圈隔开,然后一起装入待测轴承套中,两边用待测轴承端盖固定；⑸将设在待测轴承套上的挡片与测力传感器触针接触；⑹将待测轴承旋转产生的摩擦力矩传递给测力传感器,即测得待测轴承旋转时的摩擦力矩。本发明待测轴承既是试验轴承,也是支撑轴承,更加符合实际的工况,同时也消除了支撑轴承对试验结果带来的影响。(The invention relates to a method for measuring friction torque of a bearing during rotation, which comprises the following steps of ⑴ placing a bearing sleeve to be measured on a transmission shaft linked with a high-speed servo motor, ⑵ clamping and fixing one bearing to be measured through a bearing fastening tool I to be measured and a bearing fastening tool II to be measured, ⑶ clamping and fixing the other bearing to be measured according to steps ⑴ - ⑵, ⑷ separating two bearings to be measured by using check rings, then placing the two bearings to be measured into the bearing sleeve to be measured together, fixing the two sides by using bearing end covers to be measured, ⑸ contacting a baffle arranged on the bearing sleeve to be measured with a force sensor contact pin, and ⑹ transmitting friction torque generated by rotation of the bearing to be measured to a force sensor to measure the friction torque of the bearing to be measured during rotation.)

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

⑴ placing the bearing sleeve (2) to be tested on a transmission shaft (7) linked with a high-speed servo motor;

⑵ a bearing (1) to be tested is clamped and fixed through a bearing fastening tool I (4) to be tested and a bearing fastening tool II (5) to be tested;

⑶ clamping and fixing the other bearing (1) to be tested according to the steps ⑴ - ⑵;

⑷ separating the two assembled bearings (1) to be tested by a retainer ring (3), then assembling the two bearings together into the bearing sleeve (2) to be tested, and fixing the two sides by end covers (6) of the bearings to be tested;

⑸ the baffle sheet arranged on the bearing sleeve (2) to be measured is contacted with the contact pin of the force measuring sensor;

⑹, 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.

2. The method for measuring the friction torque during the bearing rotation as claimed in claim 1, wherein in the step ⑵, 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 taper surface at one end of the transmission shaft (7).

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:

⑴ placing the bearing sleeve to be tested on the transmission shaft linked with the high-speed servo motor;

⑵ a bearing to be tested is clamped and fixed by the bearing to be tested fastening tool I and the bearing to be tested fastening tool II;

⑶ clamping and fixing the other bearing to be tested according to the steps ⑴ - ⑵;

⑷ separating the two assembled bearings to be tested by a retainer ring, then assembling the two assembled bearings to be tested into the bearing sleeve to be tested, and fixing the two sides by end covers of the bearings to be tested;

⑸ contacting the baffle plate on the bearing sleeve to be tested with the contact pin of the force transducer;

⑹, the friction torque generated by the rotation of the bearing to be measured is transmitted to the force transducer, that is, the friction torque generated by the rotation of the bearing to be measured is measured.

And in the step ⑵, 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:

⑴ placing the bearing bush 2 to be tested on the transmission shaft 7 linked with the high-speed servo motor;

⑵, a bearing 801 to be tested is clamped and fixed by a bearing fastening tool I4 to be tested and a bearing fastening tool II 5 to be tested, taper holes are arranged on the bearing fastening tool I4 to be tested and the bearing fastening tool II 5 to be tested, and the taper holes are matched with the taper surface at one end of the transmission shaft 7;

⑶ clamping and fixing another bearing 1 to be tested according to the steps ⑴ - ⑵;

⑷, separating two assembled bearings 1 to be tested by a retainer ring 3, then assembling the two bearings into the bearing sleeve 2 to be tested (the bearing 1 to be tested and the like are assembled into the bearing sleeve by a bearing disassembling and assembling tool for assistance), and fixing the two sides by bearing end covers 6 to be tested;

⑸ the baffle sheet arranged on the bearing sleeve 2 to be measured is contacted with the contact pin of the force transducer;

⑹ applies load to two transmission shafts 7 with the same rotation speed, and transmits the friction torque generated by the rotation of the bearing 1 to be measured to the force transducer, i.e. the friction torque generated by the rotation of the bearing 1 to be measured is 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.