CN201285334Y - Measurement instrument for detecting dynamic friction torque of bearing - Google Patents
Measurement instrument for detecting dynamic friction torque of bearing Download PDFInfo
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- CN201285334Y CN201285334Y CNU2008202207548U CN200820220754U CN201285334Y CN 201285334 Y CN201285334 Y CN 201285334Y CN U2008202207548 U CNU2008202207548 U CN U2008202207548U CN 200820220754 U CN200820220754 U CN 200820220754U CN 201285334 Y CN201285334 Y CN 201285334Y
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Abstract
A measuring apparatus used for detecting a dynamic friction moment of a bearing has a structure that the outer ring of a measured bearing 4 is placed in a step of an outer seat 3, the inner ring of the measured bearing 4 passes through a load bar 6, the upper end of the load bar 6 is sleeved with a deflector rod 5 with flexible materials, the deflector rod 5 is movably fixed on a moment sensor 7 positioned and fixed on a support 8, and the lower end of the moment sensor 7 is provided with a damping oil cup 9; the lower end of the outer seat is connected with a main shaft 2 which simultaneously rotates, the main shaft 2 is supported and fixed by a supporting bearing 1 which is fixed on the measuring apparatus, the lower end of the main shaft 2 is connected with a belt pulley 15 through a flexible coupler 16, and the belt pulley 15 is driven by a motor 13 which is connected and controlled by an electric cabinet 14 and a computer 17 with designed procedures; the load bar 6 is connected with a load line 10 which is connected with a load weight 11, and the load weight 11 is suspended in a load damping oil cup 12. The measuring apparatus adopts a dual-damping bucking-out system and can effectively reduce the moment interference, thereby enhancing the precision and the stability of the operation of the measured bearing 4.
Description
Technical field
The utility model belongs to the bearing measuring technical field, especially a kind of measuring instrument that is used to detect the bearing dynamic friction torque.
Background technology
Bearing frictional torque is divided into starting friction moment and dynamic friction torque.Starting friction moment is meant bearing by the static moment of resistance that will overcome to rotation, and dynamic friction torque is the size and the fluctuation situation of reflection bearing suffered moment of resistance under a certain rotating speed; Therefore, the quality of bearing dynamic friction torque has been represented the quality of bearing dynamic property and the height of bearing quality to a great extent.At home and abroad in the bearing industry, be the necessary instrument that detects bearing dynamic property quality less than 20 rev/mins bearing low speed dynamic friction torque measuring instrument to rotating speed.
At present at home and abroad, the development principle of bearing low speed dynamic friction torque measuring instrument mainly contains three kinds.
First kind of method for driving shaft employing air bearing, the compensation deals of torque signals employing electric bridge developed.Advantage is: air bearing is very little to the interference of measured bearing, and the torque signals of being surveyed has reflected the performance of bearing dynamic friction torque more realistically; Shortcoming is: because very strict to compressed-air actuated quality requirements, need special dehumidifying and cleaner, so the price of a whole set of instrument is higher, and (domestic equipment is more than 300,000 yuan, import instrument is more than 600,000 yuan), the operation and maintenance expense is also very high, and the serviceable life of instrument is not high yet, and using will overhaul after 2 years.
Second kind is to drive measured bearing by the slowspeed machine driven gear, by power bar taut wire measured bearing is loaded, and gathers torque signals by torque sensor.Advantage is: simple in structure, the instrument price is lower, and the operation and maintenance expense is also lower; Shortcoming is:
1) gear operation brings certain interference to measured bearing;
2) steel wire needs experimental measurement with the moment of torsion that the measured bearing twisting brings, and fixed, the compensation of the rower of going forward side by side needs often to change steel wire, demarcates again; Coherence request to the steel wire torsional performance is very tight, otherwise will revise compensation setting;
3) measured bearing is stirred impact that torque sensor brings and hysteresis phenomenon (for the measured bearing of matter, this phenomenon is lighter), to make the signal of moment sensor acquisition and the true moment of bearing that very big error be arranged, this also is the fatal difficult point of this class moment instrument, so this class moment instrument can only be used to measure the bearing that moment is required lower large-size.
The third is that the measured bearing that passes through of external in recent years development drives moving grating, according to moving grating and the signal of quiet grid ratio to producing, and handles the dynamic friction torque of acquisition bearing through the analysis software of special exploitation.Advantage is: the measured torque signals that analyzes is truer, reliable.Shortcoming is:
1) technical difficulty is very big;
2) very high to the manufacturing accuracy and the installation accuracy requirement of dynamic and static grating, the present domestic high-precision like this grating that is difficult to produce is also very tight to the import barrier of China.
For the miniature bearing of bearing bore diameter less than 10 millimeters, generally below 0.1mN.m, minimum is 0.002mN.m to its dynamic friction torque; Therefore very high to precision, the error requirements of moment instrument, the development difficulty is very big.But because high-precision miniature bearing is widely used in space flight, aviation field again, the dynamic friction torque of this class bearing is weighed the examination essential items for inspection of its quality quality often.
Summary of the invention
For addressing the above problem, the utility model has designed a kind of measuring instrument that is used to detect the bearing dynamic friction torque, this measuring instrument adopts two damping compensation systems, can effectively reduce disturbance torque, has improved the precision and the stability of measured bearing running to a great extent.
For achieving the above object, the utility model adopts following technical scheme:
The described measuring instrument that is used to detect the bearing dynamic friction torque mainly is by spring bearing, main shaft, outer seat, driving lever, load bar, torque sensor, support, the damping lubricating cup, loaded line, load counterweight, load the damping lubricating cup, motor, electric cabinet, belt pulley, flexible clutch, computing machine constitutes, wherein the measured bearing outer ring is placed in the step of outer seat, the measured bearing inner ring penetrates load bar, the driving lever that has flexible material is inserted in the load bar upper end, driving lever (5) is stirred the torque sensor that is fixed on the support, torque sensor is fixed on the support, is provided with the damping lubricating cup in the lower end of torque sensor; The lower end of outer seat is connected with the main shaft that together rotates, main shaft is fixed on the spring bearing support fixation on the measuring instrument, the lower end of main shaft is connected with belt pulley by flexible clutch, and belt pulley is by motor-driven, and motor is by electric cabinet and the computing machine interlock control that designs program; Be connected with loaded line on load bar, loaded line connects the loading counterweight again, loads counterweight and is suspended in the loading damping lubricating cup.
Because adopt aforesaid technical scheme, the utility model produces following solution effect:
1, the utility model is simple and compact for structure, need not external unit, and price can be controlled in 100,000 yuan, and operation is very reliable, convenient.
2, by adopting technological means such as two damping compensation systems, high precision axle system, closed loop driving control system, reduce disturbance torque effectively to produce error, improved precision and stability.
3, the utility model is through the verification experimental verification of 23,95 and 18 3 model bearings, and its precision and error are less than 5%, and the precision of the low speed dynamic friction torque instrument of domestic development and error mostly are greatly more than 10%, have application value widely.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Among Fig. 1: 1-spring bearing; 2-main shaft; 3-outer seat; 4-measured bearing; 5-driving lever; 6-load bar; 7-torque sensor; 8-support; 9-damping lubricating cup; 10-loaded line; 11-loading counterweight; 12-loading damping lubricating cup; 13-motor; 14-electric cabinet; 15-belt pulley; 16-flexible clutch; 17-computing machine.
Embodiment
In conjunction with Fig. 1, the measuring instrument that is used to detect the bearing dynamic friction torque of the present utility model mainly is by spring bearing (1), main shaft (2), outer seat (3), driving lever (5), load bar (6), torque sensor (7), support (8), damping lubricating cup (9), loaded line (10), load counterweight (11), load damping lubricating cup (12), motor (13), electric cabinet (14), belt pulley (15), flexible clutch (16), computing machine (17) constitutes, wherein measured bearing (4) outer ring is placed in the step of outer seat (3), measured bearing (4) inner ring penetrates load bar (6), the driving lever (5) that has flexible material is inserted in load bar (6) upper end, driving lever (5) is stirred the torque sensor (7) that is fixed on the support (8), torque sensor (7) is fixed on the support (8), is provided with damping lubricating cup (9) in the lower end of torque sensor (7); The lower end of outer seat (3) is connected with the main shaft (2) that together rotates, main shaft (2) is fixed on spring bearing (1) support fixation on the measuring instrument, the lower end of main shaft (2) is connected to belt pulley (15) by flexible clutch connection (16), belt pulley (15) is driven by motor (13), and motor (13) is controlled by electric cabinet (14) and computing machine (17) interlock that designs program; Be connected with loaded line (10) on load bar (6), loaded line (10) connects loading counterweight (11) again, loads counterweight (11) and is suspended in the loading damping lubricating cup (12).
When motor (13) drives the rotation of drive shaft (2) constant speed, measured bearing (4) outer ring is along with outer seat (3) rotation, because the existence of measured bearing (4) internal friction, measured bearing (4) outer ring drives steel ball, steel ball drives the rotation of measured bearing (4) inner ring again, driving lever (5) on the load bar that is fixed on (6) is stirred torque sensor (7), by the voltage signal of torque sensor (7) output sign measured bearing (4) moment of friction, voltage signal is presented on computing machine (17) screen with the form output of digital signal.
Claims (1)
1, a kind of measuring instrument that is used to detect the bearing dynamic friction torque, it is characterized in that: this measuring instrument mainly is by spring bearing (1), main shaft (2), outer seat (3), driving lever (5), load bar (6), torque sensor (7), support (8), damping lubricating cup (9), loaded line (10), load counterweight (11), load damping lubricating cup (12), motor (13), electric cabinet (14), belt pulley (15), flexible clutch (16), computing machine (17) constitutes, wherein measured bearing (4) outer ring is placed in the step of outer seat (3), measured bearing (4) inner ring penetrates load bar (6), the driving lever (5) that has flexible material is inserted in load bar (6) upper end, driving lever (5) is stirred the torque sensor (7) that is fixed on the support (8), torque sensor (7) is fixed on the support (8), is provided with damping lubricating cup (9) in the lower end of torque sensor (7); The lower end of outer seat (3) is connected with the main shaft (2) that together rotates, main shaft (2) is fixed on spring bearing (1) support fixation on the measuring instrument, the lower end of main shaft (2) is connected to belt pulley (15) by flexible clutch connection (16), belt pulley (15) is driven by motor (13), and motor (13) is controlled by electric cabinet (14) and computing machine (17) interlock that designs program; Be connected with loaded line (10) on load bar (6), loaded line (10) connects loading counterweight (11) again, loads counterweight (11) and is suspended in the loading damping lubricating cup (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202207548U CN201285334Y (en) | 2008-10-30 | 2008-10-30 | Measurement instrument for detecting dynamic friction torque of bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202207548U CN201285334Y (en) | 2008-10-30 | 2008-10-30 | Measurement instrument for detecting dynamic friction torque of bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201285334Y true CN201285334Y (en) | 2009-08-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202207548U Expired - Fee Related CN201285334Y (en) | 2008-10-30 | 2008-10-30 | Measurement instrument for detecting dynamic friction torque of bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201285334Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410898A (en) * | 2011-08-12 | 2012-04-11 | 洛阳轴研科技股份有限公司 | Test method for friction torque of back-to-back pairing minitature ball bearing under application of axial loads |
| CN104977112A (en) * | 2015-07-09 | 2015-10-14 | 长春理工大学 | Precise shaft dynamic torque measuring instrument |
| CN105716866A (en) * | 2016-04-14 | 2016-06-29 | 燕山大学 | Testing machine for simulating friction moment of spaceflight bearing under zero gravity |
| CN108318165A (en) * | 2017-12-14 | 2018-07-24 | 西安益翔航电科技有限公司 | A kind of bearing dynamic friction torque tester |
| CN110849631A (en) * | 2019-11-20 | 2020-02-28 | 西安工业大学 | Engine spindle rotation damping testing device |
-
2008
- 2008-10-30 CN CNU2008202207548U patent/CN201285334Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410898A (en) * | 2011-08-12 | 2012-04-11 | 洛阳轴研科技股份有限公司 | Test method for friction torque of back-to-back pairing minitature ball bearing under application of axial loads |
| CN104977112A (en) * | 2015-07-09 | 2015-10-14 | 长春理工大学 | Precise shaft dynamic torque measuring instrument |
| CN104977112B (en) * | 2015-07-09 | 2017-05-31 | 长春理工大学 | Precision bearing system dynamic torque measuring instrument |
| CN105716866A (en) * | 2016-04-14 | 2016-06-29 | 燕山大学 | Testing machine for simulating friction moment of spaceflight bearing under zero gravity |
| CN108318165A (en) * | 2017-12-14 | 2018-07-24 | 西安益翔航电科技有限公司 | A kind of bearing dynamic friction torque tester |
| CN110849631A (en) * | 2019-11-20 | 2020-02-28 | 西安工业大学 | Engine spindle rotation damping testing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090805 Termination date: 20171030 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |