CN111077067B - Wet-type disc friction plate friction coefficient measuring device and measuring method - Google Patents
Wet-type disc friction plate friction coefficient measuring device and measuring method Download PDFInfo
- Publication number
- CN111077067B CN111077067B CN202010048321.4A CN202010048321A CN111077067B CN 111077067 B CN111077067 B CN 111077067B CN 202010048321 A CN202010048321 A CN 202010048321A CN 111077067 B CN111077067 B CN 111077067B
- Authority
- CN
- China
- Prior art keywords
- friction plate
- flange
- motor
- static friction
- sealed cabin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a friction coefficient measuring device for a wet-type disc friction plate, which comprises a dynamic friction plate device, a static friction plate device and a measurement control system, wherein the dynamic friction plate device comprises a dynamic friction plate, a dynamic friction plate flange, a motor bracket, a dynamic friction plate sealed cabin and a double-lip oil seal; the static friction plate device comprises a static friction plate, a static friction plate flange, a flange base, a static friction plate sealed cabin, an L-shaped stress application screw, a pressure sensor and a temperature sensor; the measurement control system enables the motor to rotate, collects current, voltage, rotating speed signals, pressure signals and temperature signals of the rotation of the motor, and calculates the friction coefficient according to a calculation formula. The invention also provides a method for measuring by using the measuring device, and the device can realize the measurement of wet friction coefficients under the conditions of different materials, different pressures and different surface roughness.
Description
Technology neighborhood
The invention belongs to the technical field of a friction coefficient measuring device of a disc type friction plate and measurement thereof, and particularly relates to a friction coefficient measuring device and a friction coefficient measuring method for a wet type disc type friction plate.
Background
The wet disc brake is widely applied to the fields of engineering machinery, mining machines, ship cranes and the like due to the reliable performance and the simple structure. The main technology of the wet disc brake is friction braking, and the friction coefficient is the most critical parameter in the friction braking and directly influences the braking effect of the brake. The friction coefficient is not a constant and varies with the material, cooling medium, speed, and must be determined experimentally, so it is important to establish a device for measuring the friction coefficient under lubricated wet conditions.
The traditional measurement aiming at the friction coefficient is to measure the dry friction coefficient, and the wet friction coefficient is rarely measured. In the case of the presence of the lubricating oil, the calorific value of the wet friction is different from that of the dry friction, and the parameters related to the dry friction cannot be directly applied to the analysis and calculation. Therefore, a device for measuring wet disc friction plates is needed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a device and a method for measuring the friction coefficient of a wet-type disc friction plate.
The technical scheme is as follows: in order to achieve the above purpose, the invention adopts the following scheme:
a wet disc friction plate friction coefficient measuring device comprises: the device comprises a static friction plate device, a dynamic friction plate device and a measurement control system, wherein the dynamic friction plate device comprises a motor, a motor bracket, a dynamic friction plate sealed cabin, a dynamic friction plate flange and a retainer ring; the motor is arranged on the motor support, the dynamic friction plate is arranged on the motor shaft through a retaining ring and a dynamic friction plate flange, the dynamic friction plate sealed cabin is arranged on the motor support through a screw, and dynamic sealing is carried out by using a double-lip oil seal; the static friction plate device comprises a static friction plate, a static friction plate flange, a static friction plate sealed cabin, a flange base, a positioning pin, a spring, a cushion block, an L-shaped stress application screw rod, an end cover, a sheet type force sensor and a temperature sensor; the static friction plate is arranged on the flange base through a static friction plate flange; the static friction plate sealed cabin is arranged on the static friction plate flange through a double-lip oil seal; the positioning pins are arranged in flange keys in the flange base; the sheet type force sensor is arranged between the static friction plate flange and the spring cushion block; the end cover is arranged on the flange base through a screw, and the L-shaped stress application screw is arranged on the end cover through a thread; the static friction plate sealed cabin and the dynamic friction plate sealed cabin are connected through a bolt, and are sealed through an O-shaped sealing ring; the dynamic friction plate device and the static friction plate device are respectively arranged on the mounting base and the sliding block; the measurement control system consists of an upper computer, a lower computer, a temperature sensor and a sheet type force sensor, wherein the temperature sensor is fixed in a static friction plate sealed cabin through threads to measure the temperature of lubricating oil, the sheet type force sensor is fixed between a static friction plate flange and a cushion block to measure the force applied by an L-shaped stress application screw, and the sheet type force sensor and the temperature sensor output analog voltage signals. The lower computer receives motor rotating speed and voltage signals fed back by the sheet type force sensor, the temperature sensor and the motor driver, data are sent to the upper computer by an RS485 communication protocol, the upper computer is compiled by LabVIEW, and the upper computer converts the signals into real pressure, temperature, motor voltage and rotating speed signals and displays the signals in real time. Meanwhile, an operator can input the target rotating speed of the motor on an interface of the upper computer, and the lower computer receives a target rotating speed signal and then corresponds the target rotating speed signal into a control voltage signal to be transmitted to the motor controller to realize the speed regulation of the motor.
Preferably, the force sensor adopts a sheet type force sensor, so that the space of the whole device is saved.
Preferably, the rotation of the dynamic friction plate is realized by adopting a check ring, so that the problem that the motor shaft is too long in output and inconvenient to seal is effectively avoided.
Preferably, the limitation of the circumferential movement of the static friction plate is realized by a positioning pin.
Preferably, the dynamic friction plate sealed cabin is provided with a lubricating oil inlet, a lubricating oil outlet and an observation window, so that the lubricating oil can be conveniently added and released, and the observation window is convenient for observing the adding amount of the lubricating oil.
Preferably, the temperature sensor is an armored temperature sensor with threads, so that the static friction plate sealed cabin is convenient to seal.
Preferably, the static friction plate sealed cabin and the dynamic friction plate sealed cabin are mainly connected in a sealing mode through an O-shaped sealing ring and a bolt.
Preferably, the application of the frictional pressure is performed by an L-shaped forcing screw.
Preferably, the friction plate mounting die can be replaced, and friction coefficients between friction plates with different materials and roughness are measured by replacing friction plates with different surface roughness and materials.
The method for testing by using the device comprises the following steps:
step one, adding lubricating oil into a sealed cabin;
step two, calibrating the sheet type pressure sensor;
loading the required force by adding an L-shaped force application screw rod;
regulating the rotation speed of the motor, collecting the rotation speed n of the motor, the current I, the voltage U signal, the temperature signal and the sheet type force sensor signal P when the motor operates stably, and obtaining the signals through a formula
And calculating the friction coefficient under the conditions of different forces and different rotating speeds, wherein R is the friction radius.
The wet disc type friction coefficient measuring device can realize the measurement of wet friction coefficients under different pressures, different materials, different lubricating oils and different surface roughness, and can more accurately acquire the change relation between the friction coefficients and the temperature during friction braking by measuring the temperature during friction.
Drawings
FIG. 1 is a schematic cross-sectional view of a wet disc friction coefficient measuring device according to the present invention;
FIG. 2 is a schematic three-dimensional structure diagram of a wet disc friction coefficient measuring device according to the present invention;
FIG. 3 is a schematic view of a retainer ring of the present invention;
FIG. 4 is an L-shaped stressing screw of the present invention;
fig. 5 is a schematic diagram of the lower computer control circuit of the present invention.
In the figure, 1, a motor, 2, a double-lip oil seal, 3, a retainer ring, 4, a movable friction plate flange, 5, a movable friction plate, 6, an O-shaped sealing ring, 7, a static friction plate, 8, a static friction plate flange, 9, a double-lip oil seal, 10, a positioning pin, 11, a sheet type force sensor, 12, an end cover, 13, a spring, 14, a spring cushion block, 15, an L-shaped stress application screw rod, 16, a motor bracket, 17, a movable friction plate sealing cabin, 18, an observation window, 19, a static friction plate sealing cabin, 20, a temperature sensor, 21, a sliding block, 22, a flange base and 23 are provided with a base.
Detailed Description
The present invention is described in greater detail in the following description with reference to the figures and the specific embodiments, it is to be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, which is defined in the appended claims, and modifications thereof by those skilled in the art after reading the present invention are within the scope of the present invention.
Referring to fig. 1, the measuring device of the present invention mainly includes a dynamic friction plate device, a static friction plate device and a measurement control system.
In the dynamic friction device, the motor 1 is mounted on the motor bracket 16 through screws, and the motor bracket 16 is mounted on the mounting base 23 through screws. The dynamic friction plate 5 is installed on the dynamic friction plate flange 4 through a screw, the dynamic friction plate flange 4 is installed on an output shaft of the motor 1 through a retainer ring 3, the dynamic friction plate sealed cabin 17 is installed on the motor support 16 through a screw, the dynamic friction plate sealed cabin 17 and the dynamic friction plate flange 4 are in dynamic sealing through the double-lip oil seal 2, the dynamic friction plate sealed cabin 17 is provided with a groove for placing the O-shaped sealing ring 6 and used for sealing the dynamic friction plate sealed cabin 17 and the static friction plate sealed cabin 19, and the dynamic friction plate sealed cabin 17 is connected with the static friction plate sealed cabin 19 through a bolt.
In the static friction device, a static friction plate 7 is connected with a static friction plate flange 8 through a screw, the static friction plate flange 8 is arranged in a flange base 22, a positioning pin 10 is used for fixing the circumferential movement of the static friction plate flange 8, a sheet type force sensor 11 is arranged between the static friction plate flange 8 and a cushion block 14, spring cushion blocks 13 and 14 are arranged in an end cover 12, the end cover 12 is arranged on the flange base 22 through the screw, and an L-shaped stress application screw rod 15 is arranged on the end cover 12 through threads, so that the force loading is realized. The flange base 22 is installed on the sliding block 21, the sliding block 21 is installed on the installation base 23, the axial movement of the static friction device is achieved, the friction plate is convenient to replace, and the static friction plate sealing cabin 19 is axially sealed with the static friction flange 8 through the double-lip oil seal 9.
The measuring method of the present invention, using the above-described measuring apparatus, operates according to the following steps:
step 1), installing a dynamic friction plate 5 and a static friction plate 7;
step 2) calibrating the sheet type force sensor 11;
step 3), adding lubricating oil through the upper end of a dynamic friction plate sealed cabin 19, and determining the input amount through an observation window 18;
step 4), setting the rotating speed of the movable friction plate 5 in the upper computer software, and sending the rotating speed to the lower computer;
step 5) the lower computer receives the command, starts the motor 1, and after the data is stabilized, the upper computer software collects the current, voltage and rotating speed signals of the motor 1, the force signal of the sheet-type force sensor 11 and the temperature signal of the temperature sensor 20;
step 6) the friction torque T can be calculated by the formula
And solving, wherein,t is friction torque, U is voltage, I is current and n is motor speed;
step 7) according to
Wherein mu is a friction coefficient, T is a friction torque, P is a pressure, R is a friction radius, the friction coefficient can be obtained, and the change relation between the friction coefficient and the temperature can be analyzed by combining the collected temperature data.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (6)
1. A wet-type disc friction plate friction coefficient measuring device is characterized by comprising a dynamic friction plate device, a static friction plate device and a measuring control system; wherein the content of the first and second substances,
the dynamic friction plate device comprises a motor, a motor bracket, a dynamic friction plate sealed cabin, a dynamic friction plate flange, a retainer ring, a double-lip oil seal and an O-shaped seal ring; the motor is arranged on the motor support, the movable friction plate is fixed with the movable friction plate flange through a screw, the movable friction plate flange is arranged on the motor shaft through a retaining ring, the friction plate sealed cabin is arranged on the motor support through a screw, and the movable seal between the movable friction plate flange and the movable friction plate sealed cabin is completed by using the double-lip oil seal;
the static friction plate device comprises a static friction plate, a static friction plate flange, a static friction plate sealed cabin, a double-lip oil seal, a flange base, a positioning pin, a spring, a cushion block, an L-shaped stress application screw and an end cover; the static friction plate is arranged on the static friction plate flange through a screw; the static friction plate flange is arranged on the flange base; the sealing mode of the static friction plate sealed cabin and the static friction plate flange adopts a double-lip oil seal mode; the positioning pin is arranged in a flange key in the flange base, the end cover is arranged on the flange base through a screw, the spring and the cushion block are arranged in the end cover, and the L-shaped stress application screw rod is arranged on the end cover through a thread;
the dynamic friction plate sealed cabin and the static friction plate sealed cabin are sealed in an O-shaped sealing ring mode, are connected through bolts to form a complete sealed cabin, lubricating oil is added and released in the sealed cabin, the dynamic friction plate and the static friction plate are subjected to friction test in the sealed cabin, and different pressures are applied by rotating an L-shaped stress application screw rod;
the measurement control system comprises an upper computer, a lower computer, a temperature sensor and a sheet type force sensor; the temperature sensor is fixed in the static friction plate sealed cabin through threads to measure the temperature of lubricating oil; the sheet type force sensor is fixed between the static friction plate flange and the cushion block, the magnitude of the force applied by the L-shaped stressing screw rod is measured, and the sheet type force sensor and the temperature sensor output analog voltage signals; the lower computer receives motor rotating speed and voltage signals fed back by the sheet type force sensor, the temperature sensor and the motor driver and sends data to the upper computer by an RS485 communication protocol; the upper computer is compiled by LabVIEW, and the signals received by the lower computer are converted into real pressure, temperature, motor voltage and rotating speed signals by the upper computer and displayed in real time.
2. The device for measuring the friction coefficient of a wet disc type friction plate according to claim 1, wherein the retainer ring is mounted on an output shaft of the motor, and the dynamic friction plate flange is driven to rotate by a key.
3. A wet disc friction plate friction coefficient measuring device as claimed in claim 1 wherein the static friction plate flange is axially moved by a locating pin to avoid circumferential rotation.
4. A wet disc friction plate friction coefficient measuring device as set forth in claim 1 wherein said temperature sensor is a threaded armored thermocouple.
5. The apparatus as claimed in claim 1, wherein an observation window is formed in the dynamic friction plate sealed compartment.
6. A wet disc friction plate friction coefficient measuring device as claimed in claim 1, wherein the method of testing therewith comprises the steps of:
step one, adding lubricating oil into a sealed cabin;
step two, calibrating the sheet type pressure sensor;
loading the required force by adding an L-shaped force application screw rod;
regulating the rotation speed of the motor, collecting the rotation speed n of the motor, the current I, the voltage U signal, the temperature signal and the sheet type force sensor signal P when the motor operates stably, and obtaining the signals through a formula
And calculating the friction coefficient under the conditions of different forces and different rotating speeds, wherein R is the friction radius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010048321.4A CN111077067B (en) | 2020-01-16 | 2020-01-16 | Wet-type disc friction plate friction coefficient measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010048321.4A CN111077067B (en) | 2020-01-16 | 2020-01-16 | Wet-type disc friction plate friction coefficient measuring device and measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111077067A CN111077067A (en) | 2020-04-28 |
| CN111077067B true CN111077067B (en) | 2021-05-11 |
Family
ID=70323472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010048321.4A Active CN111077067B (en) | 2020-01-16 | 2020-01-16 | Wet-type disc friction plate friction coefficient measuring device and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111077067B (en) |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0139390B1 (en) * | 1994-05-03 | 1998-07-01 | 김은영 | Method for testing the abrasion and measuring the coefficiency of friction of the lateral surface of a cylindrical body, and apparatus for the same |
| JP3574218B2 (en) * | 1995-05-12 | 2004-10-06 | 株式会社リケン | Friction and wear test method and testing machine |
| JP3505501B2 (en) * | 2000-10-19 | 2004-03-08 | 株式会社大和製作所 | Device for measuring sliding friction coefficient of automobile road surface |
| ATE525735T1 (en) * | 2002-10-09 | 2011-10-15 | Areva T & D Sas | SPRING DRIVE ONE-WAY CLUTCH ASSEMBLY FOR HIGH VOLTAGE CIRCUIT SWITCHES |
| CN102095541B (en) * | 2010-12-06 | 2012-06-27 | 东南大学 | Experiment table for studying friction mechanism of precision ball screw pair |
| CN202049092U (en) * | 2011-03-22 | 2011-11-23 | 常州精瑞自动化装备技术有限公司 | Friction material testing machine |
| CN102288502B (en) * | 2011-05-13 | 2013-02-13 | 中国矿业大学 | Variable-load cylinder-sleeve piston-ring frictional wear testing device |
| CN202141657U (en) * | 2011-05-13 | 2012-02-08 | 重庆市蓝黛实业有限公司 | Tester for detecting temperature generated by friction of vehicle wet-type multiple disc clutch and steel sheet |
| CN102269678B (en) * | 2011-05-13 | 2013-01-30 | 重庆蓝黛动力传动机械股份有限公司 | Testing device for temperature measurement of wet multi-plate clutch friction steel disc |
| CN203414280U (en) * | 2013-07-31 | 2014-01-29 | 武汉市祥龙摩擦材料有限责任公司 | Automobile braking performance inertia testing machine |
| CN105556149B (en) * | 2013-09-09 | 2018-01-30 | 株式会社艾科赛迪 | Clutch friction member |
| CN104297148B (en) * | 2014-10-28 | 2017-01-18 | 扬州大学 | Lubricated friction feature measurement and analysis system and operating method thereof |
| CN104568424B (en) * | 2015-02-05 | 2017-09-19 | 东南大学 | The loading device of load force direction self-balancing and the numerically-controlled slide Static stiffness test platform of force direction automatic control |
| CN105021483B (en) * | 2015-07-14 | 2017-08-04 | 北京信息科技大学 | The method of testing of a kind of friction of wet clutch wear extent and test bed |
| CN204988921U (en) * | 2015-09-25 | 2016-01-20 | 沈阳工业大学 | Wearing and tearing clearance adjustment formula ring piece friction wear testing machine |
| CN105277459B (en) * | 2015-10-09 | 2018-04-06 | 天津工程机械研究院 | Multi-functional fatigue wear testing machine |
| CN105910811A (en) * | 2016-06-01 | 2016-08-31 | 华南理工大学 | Cam tappet wearing test device |
| CN105973740B (en) * | 2016-06-14 | 2019-01-04 | 大连海事大学 | High differential speed rotation " surface-to-surface " contact wear experimental rig and test method |
| CN106404659A (en) * | 2016-08-25 | 2017-02-15 | 辽宁科技学院 | Measuring device used for measuring friction coefficients of disk-type friction sheets, and measuring method thereof |
| CN106226230B (en) * | 2016-09-06 | 2022-03-15 | 齐鲁工业大学 | Mechanical loading device of ball dish testing machine |
| CN109490127A (en) * | 2019-01-15 | 2019-03-19 | 江西省科学院应用物理研究所 | A kind of hydrodynamic lubrication annulus frictional wear experimental device and measurement method |
| CN110171789A (en) * | 2019-06-28 | 2019-08-27 | 合肥海源机械有限公司 | A kind of fork truck type wet drive axle |
-
2020
- 2020-01-16 CN CN202010048321.4A patent/CN111077067B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111077067A (en) | 2020-04-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103048136B (en) | High and low temperature environment service life testing machine for joint bearing | |
| CN103630301B (en) | The method of testing of a kind of hydrodynamic lubrication mechanical seal sealing property and device thereof | |
| CN110160788B (en) | Rolling bearing slipping research experiment table | |
| CN201637518U (en) | Friction torque testing instrument for rolling bearing | |
| CN101709953B (en) | Lubricant film thickness measuring instrument | |
| CN100478663C (en) | Detector for measuring bearing friction torque | |
| US3939690A (en) | Device for measuring friction and wear under surrounding high pressure | |
| WO2014180152A1 (en) | Performance test device for mechanical seal | |
| CN203178069U (en) | Hydraulic torque converter assembly performance test platform | |
| CN101832898A (en) | Horizontal end face frictional wear tester | |
| CN102865929B (en) | Measurement and test device for transient surface temperature of friction plate of dry clutch | |
| CN111896259B (en) | Ceramic roller bearing loading and testing system for low-temperature vacuum environment | |
| CN201251536Y (en) | Journal and bushing friction and wear property tester of machine tool spindle | |
| CN107843370B (en) | Device and method for testing running resistance of rail train | |
| CN110887590B (en) | High-speed bearing friction tester | |
| CN102809488B (en) | Loading mechanism of mute life testing machine of rolling bearing | |
| CN111077067B (en) | Wet-type disc friction plate friction coefficient measuring device and measuring method | |
| CN113358554B (en) | Lubricating grease and lubricating oil product test device and test method | |
| US6496789B2 (en) | Spindle characterization system | |
| CN109297706B (en) | Device and method for testing influence of interface morphology on slip and friction characteristics of wet clutch | |
| CN113295409A (en) | Bearing friction torque testing machine | |
| CN106896834B (en) | High-speed accurate main shaft pretightning force intelligent control test bench based on piezoelectric actuator | |
| CN116642695A (en) | Device and method for detecting rotation moment under load of hub bearing | |
| CN102809487B (en) | Mute life testing machine of rolling bearing | |
| Valigi et al. | A new telemetry system for measuring the rotating ring's temperature in a tribological test rig for mechanical face seals |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |