CN107796605A - A kind of friction performance of brake detection means and coefficient of friction computational methods - Google Patents
A kind of friction performance of brake detection means and coefficient of friction computational methods Download PDFInfo
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- CN107796605A CN107796605A CN201710845679.8A CN201710845679A CN107796605A CN 107796605 A CN107796605 A CN 107796605A CN 201710845679 A CN201710845679 A CN 201710845679A CN 107796605 A CN107796605 A CN 107796605A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- 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
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Abstract
The invention discloses a kind of friction performance of brake detection means and coefficient of friction computational methods, including pressure sensor, displacement transducer, temperature sensor and single-chip microcomputer；Defined from coefficient of friction, μ=F/N, N is brake pressure herein, brake pressure N is the spring force that tripping spring provides, and it is detected by second pressure sensor and obtained, and F is brake force, tilting moment conversions of the brake force F from power hydraulic pressure drum brake pedestal to floor is tried to achieve, i.e. and F=/ D, in formulaFor braking moment, it is measured by first pressure sensor, and d is the distance between power hydraulic pressure drum brake or so two pedestals, and D is the distance between two application points, therefore, μ=/DN.The present invention utilizes the conversion processing of pressure, temperature, displacement transducer and single-chip microcomputer, the change of brake friction coefficient and temperature can be detected, power hydraulic pressure drum brake push rod stroke measured by displacement transducer simultaneously and friction plate is moved back away from can be detected in real time to the frictional behaviour of brake.
Description
Technical field
The present invention relates to a kind of friction performance of brake detection means and coefficient of friction computational methods, belong to drag friction skill
Art field.
Background technology
Power hydraulic pressure drum brake brake efficiency is high, is widely used in the large-scale load-carrying such as crane, ribbon conveyer and sets
It is standby, it is to carry out important component necessary to speed and position adjustments and reliable stopping, its basic functional principle is to utilize hydraulic pressure
It is engaged with mechanical system, radially holds braked wheel tightly by two brake shoes being arranged symmetrically and produce braking moment：By electric power when opening a sluice gate
Hydraulic driver produces thrust compression spring, brake block take-off the brake disk；Pusher unloads when closing lock, and brake shoe is in tripping spring
Brake disc is held in the presence of power tightly so as to produce braking.
For a long time, research of the people power hydraulic pressure drum brake focuses primarily upon design of Structural Parameters, brake shoe
The problems such as gap adjustment, idle motion time shorten, and the detection to brake performance is not abundant enough.Such as：Patent No.
ZL201220150282.X utility model patent devises a kind of testing stand for detecting electrohydraulic brake performance, but stand
Experiment involves great expense, and can not be carried out at operating mode scene；The patent of Application No. 201420740657.7 proposes a kind of power hydraulic pressure
Brake real-time monitoring device, but the patent only designs the device alarmed during brake malfunctions, it is not specified that sentence
The method of disconnected brake troubles.
From the point of view of the present Research of presently relevant ambit, the design of power hydraulic pressure drum-like brake structure, installation are joined
Larger progress is achieved in terms of number adjustment and inertia simulation retardation test, but to power hydraulic pressure drum type brake friction
Research in terms of performance operating mode Site Detection is also insufficient.
The content of the invention
In view of the above-mentioned problems of the prior art, the present invention provides a kind of power hydraulic pressure drum type brake friction performance inspection
Device and coefficient of friction computational methods are surveyed, can be to coefficient of friction, brake temperature, friction plate system of the brake under the operating mode that works
It is dynamic move back away from and push rod stroke realize on-line checking and data storage, can realize and friction performance of brake is more comprehensively examined
Survey.
To achieve these goals, the technical solution adopted by the present invention is：A kind of power hydraulic pressure drum type brake friction
Can detection means and coefficient of friction computational methods, including power hydraulic pressure drum brake, first pressure sensor, two first
Displacement sensor, second pressure sensor, temperature sensor, second displacement sensor and single-chip microcomputer, first pressure sensor are set
In the bottom of power hydraulic pressure drum brake, two the first displacement transducers are separately positioned on power hydraulic pressure drum brake or so two
On individual brake arm, second pressure sensor is arranged on the top of the flexible springs axle of power hydraulic pressure drum brake, and temperature passes
Sensor is arranged in the Friction Disk Surface of power hydraulic pressure drum brake, and second displacement sensor is arranged on power hydraulic pressure drum-type system
The push rod top of dynamic device, first pressure sensor, two the first displacement transducers, second pressure sensor, temperature sensor, the
Two displacement transducers and monolithic mechatronics.
Further, described temperature sensor is adhered to the friction plate of power hydraulic pressure drum brake by heat stable resin
On surface.
Further, the inductive probe of described second displacement sensor is arranged on power hydraulic pressure drum brake top,
Moved with push rod.
Further, described single-chip microcomputer is additionally provided with display screen.
Further, in addition to computer, single-chip microcomputer is with calculating mechatronics.
Further, two pieces of parallel steel plates, the second pressure are set in power hydraulic pressure drum brake flexible springs shaft end
Force snesor is arranged between two blocks of steel plates.
Further, described single-chip microcomputer and Automated library system are in a casing.
A kind of coefficient of friction computational methods, are defined, μ=F/N from coefficient of friction, and N is brake pressure herein, braking pressure
Power N is the spring force that tripping spring provides, and it is detected by second pressure sensor and obtained, and F is brake force, and brake force F is from electric power
Tilting moment conversion of the hydraulic drum brake pedestal to floor is tried to achieve, i.e. and F=/ D, in formulaFor braking moment, it is by first
Pressure sensor measures, and d is the distance between two pedestals of power hydraulic pressure drum brake or so, D between two application points away from
From, therefore, μ=/ DN, the detection of coefficient of friction are just converted into the survey for surveying spring force and brake pedestal to the pressure on floor
Amount.
A kind of coefficient of friction computational methods, are defined, μ=F/N from coefficient of friction, and N is brake pressure herein, braking pressure
Power N is the spring force that tripping spring provides, and it is detected by second pressure sensor and obtained, and F is brake force, and brake force F is from electric power
Tilting moment conversion of the hydraulic drum brake pedestal to floor is tried to achieve, i.e. and F=/ D, in formulaFor braking moment, it is by first
Pressure sensor measures, and d is the distance between two pedestals of power hydraulic pressure drum brake or so, D between two application points away from
From, therefore, μ=/ DN, the detection of coefficient of friction are just converted into the survey for surveying spring force and brake pedestal to the pressure on floor
Amount.
The present invention is using pressure, temperature sensor compared with prior art, and the data received are by single-chip microcomputer
Conversion processing, the change of power hydraulic pressure drum type brake friction coefficient and temperature can be detected, and can by displacement transducer
With detect brake push rod stroke and braking move back away from numerical value, the detection to friction performance of brake is more fully；The dress
Put simple in construction, be easily installed and be convenient for carrying, the frictional behaviour of brake can be detected in real time, can effectively prevent thing
Therefore generation.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is coefficient of friction computational methods schematic diagram of the present invention；
Fig. 3 is the mounting means schematic diagram of second pressure sensor of the present invention；
In figure：101- power hydraulic pressure drum brakes, 102- first pressure sensors, 103, the displacement transducers of 104- first,
105- second pressure sensors, 106- temperature sensors, 107- second displacement sensors, 201- single-chip microcomputers, 202- display screens,
203- computers, 204- casings.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in figure 1, the present invention includes power hydraulic pressure drum brake 101, and first pressure sensor 102, two first
Displacement transducer 103,104, second pressure sensor 105, temperature sensor 106, second displacement sensor 107 and single-chip microcomputer
201；
First pressure sensor 102 is arranged on the bottom of power hydraulic pressure drum brake 101, for measuring braking moment size；
Two the first displacement transducers 103,104 are separately positioned on 101 or so two brake arms of power hydraulic pressure drum brake, measurable
The friction disc brake of left and right two is moved back away from size；
Second pressure sensor 105 is arranged on the top of the flexible springs axle of power hydraulic pressure drum brake 101, and it, which senses, visits
Head is fixedly mounted on the top of power hydraulic pressure drum brake 101 and with pushrod movement, can measure power hydraulic pressure drum brake
The pressure of device 101；
Temperature sensor 106 is arranged in the Friction Disk Surface of power hydraulic pressure drum brake 101, second displacement sensor 107
The push rod top of power hydraulic pressure drum brake 101 is arranged on, measures power hydraulic pressure drum brake push rod stroke；First pressure
Sensor 102, two the first displacement transducers 103,104, second pressure sensor 105, temperature sensor 106, second displacement
Sensor 107 and single-chip microcomputer 201 electrically connect.
In order to preferably obtain the temperature data of friction plate, temperature sensor 106 is adhered to electric power liquid by heat stable resin
In the Friction Disk Surface for pressing drum brake 101；In order to be moved back to the friction disc brake of power hydraulic pressure drum brake 101 or so
Away from being compared, it need to ensure that the first displacement transducer 103,104 installation sites are corresponding；
Single-chip microcomputer 201 is additionally provided with display screen 202, and single-chip microcomputer 201 receives data and carries out calculation process, the braking that will be calculated
Device coefficient of friction and temperature data are delivered on display screen 202, reach the effect of more intuitively on-line checking；Set up computer
203, single-chip microcomputer 201 electrically connects with computer 203, and is integrated into casing 204, is convenient for carrying, the data of the processing of single-chip microcomputer 201
It can also be passed it to by developing plate interface in computer 203, the processing again of data is carried out by upper computer software and deposited
Storage, finally forms chart on display interface.
As shown in figure 3, two pieces of parallel steel plates are set in the flexible springs shaft end of power hydraulic pressure drum brake 101, the
Two pressure sensors 105 are arranged between two blocks of steel plates, in order to ensure that the difference stress of second pressure sensor 105 is more equal
It is even, it need to ensure that the corresponding surface of two pieces of parallel steel plates being capable of parallel contact well.
As shown in Fig. 2 a kind of coefficient of friction computational methods, are defined, μ=F/N from coefficient of friction, N presses for braking herein
Power, brake pressure N are the spring force that tripping spring provides, and it detects acquisition by second pressure sensor 104, and F is brake force, system
Tilting moment conversions of the power F from the pedestal of power hydraulic pressure drum brake 101 to floor is tried to achieve, i.e. and F=/ D, in formulaFor system
Kinetic moment, it is measured by first pressure sensor 102, d between the pedestal of power hydraulic pressure drum brake 101 or so two away from
From D is the distance between two application points, and d and D are by inquiring about or measuring in the description of power hydraulic pressure drum brake 101
Arrive, therefore, μ=/ DN, the detection of coefficient of friction are just converted into the survey for surveying spring force and brake pedestal to the pressure on floor
Amount.
By taking brake drum rotate counterclockwise as an example, therefore first pressure sensor 102 is arranged on and promoted with power hydraulic pressure
The side of device, the side connecting bolt should suitably be unscrewed when first pressure sensor 102 is installed, then by first
Pressure sensor 102 is filled between contact surface；Two contact surfaces that side is installed due to first pressure sensor 102 are under pressure work
With the connecting bolt between the side of power hydraulic pressure drum brake 101 and stand, which suitably loosens, to be produced too to braking ability
It is big to influence, in the presence of the dead weight of power hydraulic pressure drum brake 101 and mount stress, first pressure sensor 102
Initial measured value be not only the gravity of brake, part stress caused by installation deformation is also included, in debugging routine
Subtract this and be initially worth to actual braking torque.
The real-time display coefficient of friction of display screen 202 and brake temperature region can pass through indicating meter real-time display coefficient of friction
And brake temperature, and the change curve of the data is plotted in oscillogram.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires rather than described above limits, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as to the involved claim of limitation.
Described above, only presently preferred embodiments of the present invention is not intended to limit the invention, every skill according to the present invention
Any trickle amendment, equivalent substitution and the improvement that art is substantially made to above example, should be included in technical solution of the present invention
Protection domain within.
Claims (8)
1. a kind of friction performance of brake detection means, it is characterised in that including power hydraulic pressure drum brake（101）, first
Pressure sensor（102）, two the first displacement transducers（103,104）, second pressure sensor（105）, temperature sensor
（106）, second displacement sensor（107）And single-chip microcomputer（201）,
First pressure sensor（102）It is arranged on power hydraulic pressure drum brake（101）Bottom, two the first displacement transducers
（103,104）It is separately positioned on power hydraulic pressure drum brake（101）On the brake arm of left and right two,
Second pressure sensor（105）It is arranged on power hydraulic pressure drum brake（101）Flexible springs axle top,
Temperature sensor（106）It is arranged on power hydraulic pressure drum brake（101）Friction Disk Surface on, second displacement sensor
（107）It is arranged on power hydraulic pressure drum brake（101）Push rod top, first pressure sensor（102）, two the first displacements
Sensor（103,104）, second pressure sensor（105）, temperature sensor（106）, second displacement sensor（107）And monolithic
Machine（201）Electrical connection.
A kind of 2. friction performance of brake detection means according to claim 1, it is characterised in that described TEMP
Device（106）Power hydraulic pressure drum brake is adhered to by heat stable resin（101）Friction Disk Surface on.
A kind of 3. friction performance of brake detection means according to claim 1, it is characterised in that described second displacement
Sensor（107）Inductive probe be arranged on power hydraulic pressure drum brake（101）Top, moved with push rod.
A kind of 4. friction performance of brake detection means according to claim 1, it is characterised in that described single-chip microcomputer
（201）It is additionally provided with display screen（202）.
5. a kind of friction performance of brake detection means according to claim 1, it is characterised in that also including computer
（203）, single-chip microcomputer（201）With computer（203）Electrical connection.
6. a kind of friction performance of brake detection means according to claim 1, it is characterised in that in power hydraulic pressure drum-type
Brake（101）Flexible springs shaft end sets two pieces of parallel steel plates, second pressure sensor（105）It is arranged on two blocks of steel plates
Between.
A kind of 7. friction performance of brake detection means according to claim 5, it is characterised in that described single-chip microcomputer
（201）And computer（203）It is integrated in a casing（204）In.
8. a kind of coefficient of friction computational methods, it is characterised in that defined from coefficient of friction, μ=F/N, N presses for braking herein
Power, brake pressure N are the spring force that tripping spring provides, and it is by second pressure sensor（105）Detection obtains, and F is brake force,
Brake force F is from power hydraulic pressure drum brake（101）Tilting moment conversion of the pedestal to floor is tried to achieve,
That is F=/ D, in formulaFor braking moment, it is by first pressure sensor（102）Measure, d is power hydraulic pressure drum brake
Device（101）The distance between pedestal of left and right two, D are the distance between two application points, therefore, μ=/DN。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710845679.8A CN107796605B (en) | 2017-09-19 | 2017-09-19 | Brake friction performance detection device and friction coefficient calculation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710845679.8A CN107796605B (en) | 2017-09-19 | 2017-09-19 | Brake friction performance detection device and friction coefficient calculation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107796605A true CN107796605A (en) | 2018-03-13 |
| CN107796605B CN107796605B (en) | 2020-07-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710845679.8A Active CN107796605B (en) | 2017-09-19 | 2017-09-19 | Brake friction performance detection device and friction coefficient calculation method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373089A (en) * | 2018-04-19 | 2018-08-07 | 石家庄五龙制动器股份有限公司 | Hub type brake braking moment true value detection sensor and braking moment true value detection method |
| CN109269790A (en) * | 2018-10-30 | 2019-01-25 | 贵州云尚物联科技股份有限公司 | Vehicle brake piece safety monitoring systems and its method based on Internet of Things |
| CN111398162A (en) * | 2020-03-27 | 2020-07-10 | 中国汽车工程研究院股份有限公司 | Method for testing friction coefficient of air pressure disc type brake assembly of commercial vehicle |
| CN112196747A (en) * | 2020-10-28 | 2021-01-08 | 江门市英合创展电子有限公司 | Monitoring and control system of wind power generation equipment brake and wind power generation equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108373089A (en) * | 2018-04-19 | 2018-08-07 | 石家庄五龙制动器股份有限公司 | Hub type brake braking moment true value detection sensor and braking moment true value detection method |
| CN108373089B (en) * | 2018-04-19 | 2024-03-12 | 石家庄五龙制动器股份有限公司 | Brake torque true value detection sensor and brake torque true value detection method for hub type brake |
| CN109269790A (en) * | 2018-10-30 | 2019-01-25 | 贵州云尚物联科技股份有限公司 | Vehicle brake piece safety monitoring systems and its method based on Internet of Things |
| CN109269790B (en) * | 2018-10-30 | 2020-07-17 | 贵州云尚物联科技股份有限公司 | Vehicle brake pad safety monitoring system and method based on Internet of things |
| CN111398162A (en) * | 2020-03-27 | 2020-07-10 | 中国汽车工程研究院股份有限公司 | Method for testing friction coefficient of air pressure disc type brake assembly of commercial vehicle |
| CN112196747A (en) * | 2020-10-28 | 2021-01-08 | 江门市英合创展电子有限公司 | Monitoring and control system of wind power generation equipment brake and wind power generation equipment |
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| CN107796605B (en) | 2020-07-17 |
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