CN106706306A - Low-speed shaft brake energy-efficiency test board and test method thereof - Google Patents
Low-speed shaft brake energy-efficiency test board and test method thereof Download PDFInfo
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- CN106706306A CN106706306A CN201710138244.XA CN201710138244A CN106706306A CN 106706306 A CN106706306 A CN 106706306A CN 201710138244 A CN201710138244 A CN 201710138244A CN 106706306 A CN106706306 A CN 106706306A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The invention relates to a low-speed shaft brake energy-efficiency test board and a test method thereof. The low-speed shaft brake energy-efficiency test board comprises a base, wherein a variable-frequency driving motor is fixedly installed on the base, one end of the variable-frequency driving motor is connected with a rotating coder, the other end of the variable-frequency driving motor is provided with a front-section main shaft by virtue of a first coupler, the front-section main shaft is provided with a main shaft bearing, a main shaft brake disc and a plurality of inertia discs, the end socket of the front-section main shaft is connected with a rear-section main shaft by virtue of a second coupler, a plurality of inertia discs are also installed on the rear-section main shaft, a tail portion of the rear-section main shaft is provided with a brake mating part, and the rear end of the brake mating part is provided with a brake mating part replacing apparatus; and the base is also provided with an inertia disc control apparatus for controlling the connection and disconnection of the inertia discs. By adopting the low-speed shaft brake energy-efficiency test board, the application flexibility is improved, and the working reliability and convenience are improved.
Description
Technical field
The present invention relates to lifting equipment technical field, especially a kind of low speed shaft brake efficiency test platform and its survey
Method for testing.
Background technology
Brake dynamometer is mainly made up of motor, main shaft, inertia disc, reductor, spring bearing.Inertia disc
Volume is big, weight is big, and maximum weight is up to 1.8 tons.And, it is necessary to according to braking moment during the brake experiment of different braking moments
Size calculate the rotary inertia for needing loading, inertia disc has different rotary inertias, and according to the total inertia for calculating, it is appropriate to carry out
Combination, determine which inertia disc accesses rotating spindle, which inertia disc and needs to depart from rotating spindle.So heavy inertia disc will
Be using by hand loading and disengaging be impossible, and depart from inertia disc be also required to fix, in order to avoid with main shaft drag turn.Using
Hydraulic system loading be most convenient, it is quick, laborsaving, save trouble.
Brake dynamometer braking moment in the past is smaller, and inertia disc is also little, therefore using the side of hand lever
Formula can just load and depart from inertia disc, and the inertia disc of disengaging holds fixation by cushion block and linkage.Although troublesome poeration,
Arduously, but be also feasible.If inertia disc weight is big, which just dying, not only operates motionless, does not also fix disengaging
Inertia disc.
The content of the invention
The applicant is for the shortcoming in above-mentioned existing production technology, there is provided a kind of low speed shaft brake efficiency test platform and
Its method of testing, flexibility is used so as to substantially increase, and improves functional reliability and convenience.
The technical solution adopted in the present invention is as follows：
A kind of low speed shaft brake efficiency test platform, including base, variable frequency drive motors are installed with the base,
One end connection rotary encoder of the variable frequency drive motors, the other end of the variable frequency drive motors is pacified by first shaft coupling
Equipped with leading portion main shaft, main shaft bearing, principal shaft braking disk and multiple inertia discs, the leading portion main shaft are installed on the leading portion main shaft
Termination back segment main shaft is connected with by second shaft coupling, multiple inertia discs are equally installed on the back segment main shaft, it is described after
The afterbody of section main shaft is provided with braking couple, and the braking couple rear end is provided with braking couple more changing device；On the base
It is also equipped with the connection of control inertia disc and not connected inertia disk control unit.
As the further improvement of above-mentioned technical proposal：
The structure of the inertia disk control unit is：Including system frame, the system frame is fixed on base, described
One end of system frame is provided with assembled hydraulic cylinder body, the two ends of the assembled hydraulic cylinder body be respectively inertia loading hydraulic cylinder and
Inertia departs from hydraulic cylinder, and the output end of the assembled hydraulic cylinder body is liquid presses piston pole, is spaced on the liquid presses piston pole and installed
There are multiple catchers, each catcher is connected with inertia disc respectively；
Catcher and inertia disc link bolt hole are provided with the catcher, one are provided with the outer circumference surface of the inertia disc and are used to
Amount valve snail keyhole, is provided with multiple inertia disc fixed bolt holes in the inertia disc；By bolt just both link together；Institute
The front end for stating catcher is provided with connecting plate, and the connecting plate is fixed by catcher with system frame connecting bolt, the connecting plate
Top locked by connecting plate fixing bolt；Groove is also provided with the liquid presses piston pole, and by the way that bearing pin is by groove and connects
Hand is connected pin shaft hole connection with piston rod；The end of the liquid presses piston pole is also equipped with piston rod bearing and piston rod stroke limit
Position；
Inertia loading oil pipe is respectively arranged with the assembled hydraulic cylinder body and inertia departs from oil pipe；
The other end of the inertia disc is additionally provided with mounting bracket, and infrared connecing is fixed with by fastening screw on the mounting bracket
Nearly switch；
It is described braking couple more changing device structure be：Support is fixed with the base, the support is provided with cabinet,
It is gear mechanism in the cabinet, one end connection handwheel of the cabinet, the handwheel is connected by rocking bar with gear mechanism, institute
The other end connection pull bar of cabinet is stated, the pull bar is connected with the bearing block of spindle nose bearing, is set on the bearing block
End bearing fixed bolt hole and shifting bolt hole are equipped with, the bottom of the bearing block is provided with rail plate.
A kind of method of testing of low speed shaft brake efficiency test platform, including following operating procedure：
The first step：During experiment, the braking moment size according to tested brake, according to JB/T10917《Caliper disc is braked
Device》Calculate the total rotary inertia for needing loading；
Second step：Further according to parts rotary inertia, each inertia disc rotary inertia in rotary shaft inertia, rotating shaft, it is determined that
Need the inertia disc for accessing；
3rd step：Start inertia disc hydraulic loaded and control system, it would be desirable to which the inertia disc of access accesses rotating shaft, it is not necessary to
Inertia disk detachment main shaft；
4th step：Tested brake is clamped into braking couple；
5th step：Start variable frequency drive motors, be tested brake jaw and open, when the braking that the speed of mainshaft reaches setting is removed
After rotating speed, motor power-off, brake, tested brake is also powered off, and tested brake jaw steps up to brake couple, whole experiment
Platform rotary system slowly stops, and in the process, rotary encoder Real-time Collection rotating speed, computer system calculates acceleration,
Braking moment is calculated by data such as inertia and acceleration, brake force is calculated according to drag friction effective radius, for system
Dynamic device efficiency test is used.
Beneficial effects of the present invention are as follows：
Compact conformation of the present invention, rationally, it is easy to operate, can be conveniently accomplished low speed shaft brake by apparatus of the present invention
The experiment of efficiency test, there is provided inertia disk control unit can flexibly using required inertia disc, there is provided braking is even
Part more changing device, in that context it may be convenient to dismounting braking couple.Whole work is flexible, and functional reliability is good, high working efficiency.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the front view of inertia disk control unit of the present invention.
Fig. 4 is the top view of Fig. 3.
Fig. 5 is the side view of inertia disk control unit of the present invention.
Fig. 6 is the front view of present invention braking couple more changing device.
Fig. 7 is the top view of Fig. 6.
Wherein：1st, rotary encoder；2nd, variable frequency drive motors；3rd, first shaft coupling；4th, main shaft bearing；5th, principal shaft braking
Disk；6th, inertia disc；7th, system frame；8th, second shaft coupling；9th, back segment main shaft；10th, couple is braked；11st, braking couple more changes the outfit
Put；1101st, pull bar；1102nd, gear mechanism；1103rd, handwheel；1104th, support；1105th, rail plate；1106th, rocking bar；12、
Base；1201st, inertia loading hydraulic cylinder；1202nd, assembled hydraulic cylinder body；1203rd, inertia departs from hydraulic cylinder；1204th, inertia loading
Oil pipe；1205th, inertia departs from oil pipe；13rd, liquid presses piston pole；14th, leading portion main shaft；1401st, catcher is connected pin shaft hole with piston rod；
1402nd, catcher and inertia disc link bolt hole；1404th, take over；15th, piston rod bearing；16th, piston rod stroke is spacing；17th, take over
With system frame connecting bolt；18th, groove；19th, connecting plate；20th, connecting plate fixing bolt；21st, inertia disc bolt hole；22nd, it is used to
Amount disk fixing bolt；23rd, mounting bracket；24th, fastening screw；25th, infrared switch；26th, spindle nose bearing；27th, spiral shell is shifted
Keyhole；28th, end bearing fixed bolt hole.
Specific embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the invention is illustrated.
As shown in Fig. 1-Fig. 7, the low speed shaft brake efficiency test platform of the present embodiment, including base 12, it is solid on base 12
Dingan County be equipped with variable frequency drive motors 2, variable frequency drive motors 2 one end connection rotary encoder 1, variable frequency drive motors 2 it is another
End is provided with leading portion main shaft 14 by first shaft coupling 3, and main shaft bearing 4, principal shaft braking disk 5 and many are provided with leading portion main shaft 14
Individual inertia disc 6, the termination of leading portion main shaft 14 is connected with back segment main shaft 9 by second shaft coupling 8, is equally installed on back segment main shaft 9
The afterbody for having multiple inertia discs 6, back segment main shaft 9 is provided with braking couple 10, and braking couple 10 rear end is provided with braking couple more
Changing device 11；Control inertia disc 6 is also equipped with base 12 to connect and the inertia disk control unit being not connected with.
The structure of inertia disk control unit is：Including system frame 7, system frame 7 is fixed on base 12, system frame
7 one end is provided with assembled hydraulic cylinder body 1202, and the two ends of assembled hydraulic cylinder body 1202 are respectively inertia loading hydraulic cylinder 1201
Depart from hydraulic cylinder 1203 with inertia, the output end of assembled hydraulic cylinder body 1202 is liquid presses piston pole 13, on liquid presses piston pole 13 between
Every multiple catchers 1404 are provided with, each catcher 1404 is connected with inertia disc 6 respectively.
Catcher and inertia disc link bolt hole 1402 are provided with catcher 1404, one is provided with the outer circumference surface of inertia disc 6
Inertia disc bolt hole 21, is provided with multiple inertia disc fixed bolt holes 22 in inertia disc 6；By bolt just both be connected to one
Rise；The front end of catcher 1404 is provided with connecting plate 19, and connecting plate 19 is fixed by catcher with system frame connecting bolt 17, is connected
Locked by connecting plate fixing bolt 20 at the top of plate 19；Groove 18 is also provided with liquid presses piston pole 13, and will be recessed by bearing pin
Groove 18 and catcher are connected pin shaft hole 1401 with piston rod and connect；The end of liquid presses piston pole 13 is also equipped with the He of piston rod bearing 15
Piston rod stroke spacing 16.
Inertia loading oil pipe 1204 is respectively arranged with assembled hydraulic cylinder body 1202 and inertia departs from oil pipe 1205.
The other end of inertia disc 6 is additionally provided with mounting bracket 23, and infrared connecing is fixed with by fastening screw 24 on mounting bracket 23
Nearly switch 25.
Brake couple more changing device 11 structure be：Support 1104 is fixed with base 12, support 1104 is provided with cabinet,
It is gear mechanism 1102 in cabinet, one end connection handwheel 1103 of cabinet, handwheel 1103 passes through rocking bar 1106 and gear mechanism
1102 connections, the other end connection pull bar 1101 of cabinet, pull bar 1101 is connected with the bearing block of spindle nose bearing 26, axle
End bearing fixed bolt hole 28 and shifting bolt hole 27 are provided with bearing, the bottom of bearing block is provided with rail plate
1105。
The method of testing of the low speed shaft brake efficiency test platform of the present embodiment, including following operating procedure：
The first step：During experiment, the braking moment size according to tested brake, according to JB/T10917《Caliper disc is braked
Device》Calculate the total rotary inertia for needing loading；
Second step：Further according to parts rotary inertia, each rotary inertia of inertia disc 6 in rotary shaft inertia, rotating shaft, it is determined that
Need the inertia disc 6 for accessing；
3rd step：Start inertia disc hydraulic loaded and control system, it would be desirable to which the inertia disc 6 of access accesses rotating shaft, is not required to
The inertia disc 6 wanted departs from main shaft；
4th step：Tested brake is clamped into braking couple 10；
5th step：Start variable frequency drive motors 2, be tested brake jaw and open, when the speed of mainshaft reaches the braking of setting
After rotating speed, motor power-off, tested brake is also powered off, and tested brake jaw steps up to brake couple 10, this testing stand
Rotary system slowly stops, in the process, the Real-time Collection rotating speed of rotary encoder 1, and constantly gathered at equal intervals by computer
Tach signal n0, n1, n2, n3, n4 ... ... nn-1；Computing in groups is carried out by computer and braking moment curve and correlation is generated
Test report, Computing model is as follows：
…
Mb- it is Brake Mean Power square
In formula：Mbd1, Mb2, Mb3... ..., Mn --- first paragraph, second segment, the 3rd section ... ..., n-th section of Brake Mean Power
Square (N.m)；
J --- total rotary inertia, kg.m2 on brake axle；
N0 --- the first rotating speed of braking, r/min；
n1, n2, n3... ... nn--- first paragraph brakes end speed, second segment braking end speed, the 3rd section of braking end speed
N-th section of braking end speed of degree ... ..., r/min；
T --- first paragraph, second segment, the 3rd section ... ..., n-th section of time value, point value such as each section of use is such as whole
Braking procedure is divided into 100 sections, then t is the 1/100 of whole braking time；
η --- the total efficiency of bearing of testing stand, takes 0.95.
Computer system calculates acceleration, braking moment is calculated by data such as inertia and acceleration, according to braking
Friction effective radius calculates brake force, so that brake efficiency test is used.
In formula：
FbThe effectual brake force of-separate unit brake, unit is ox (N)；
MbThe braking moment of-separate unit brake, when brake force of the braking moment more than the demarcation of product nameplate that experiment is measured
During square, MbIt is the braking moment that product nameplate is demarcated, otherwise, MbIt is observed brake horsepower square, unit is ox rice (N.m)；
R-theory braking radius, unit is rice (m).
Specific work process is as follows：
During experiment, the braking moment size according to tested brake, according to JB/T10917《Spot-type disc brake》Calculating needs
The total rotary inertia to be loaded, further according to parts rotary inertia, each rotary inertia of inertia disc 6 in rotary shaft inertia, rotating shaft,
It is determined that needing the inertia disc 6 for accessing.Start inertia disc hydraulic loaded and control system 7, it would be desirable to which the inertia disc 6 of access is accessed and turned
Axle, it is not necessary to inertia disc 6 depart from main shaft.Tested brake is clamped into braking couple 10, starts variable frequency drive motors 2, be tested
Brake jaw is opened, and after the braking that the speed of mainshaft reaches setting removes rotating speed, the short electricity of motor, brake is tested brake
Also power off, tested brake jaw steps up to brake couple 10, and this testing stand rotary system slowly stops, in the process, rotation
Turn the Real-time Collection rotating speed of encoder 1, computer system is calculated and decelerated to, and braking is calculated by data such as inertia and acceleration
Torque, brake force is calculated according to drag friction effective radius, so that brake efficiency test is used.
If necessary to emergent stopping in process of the test, or tested brake effectively can not rotate system by stop testing stand
System, then additional brake clamping spindle brake disc 5, rotates testing stand and stops.
When tested brake width of jaw difference or different theoretical friction radius, it is necessary to change suitable braking occasionally
Part 10.Because braking couple 10 is big, weight is big, it is necessary to be drawn spindle nose bearing 26 by braking couple more changing device 11
Go out, change appropriate braking couple 10.After more finishing changing, then end bearing is pushed by braking couple more changing device 11.
Wherein, four sets of loadings and control system are had.Two sets of front sides for being located at inertia disc 6, after two sets are located at inertia disc 6
Side, front and rear symmetrical, symmetrical oil cylinder synchronization, to ensure that inertia disc 6 moves horizontally synchronization.
When needing to change braking couple 10, the bolt in end bearing fixed bolt hole 28 is backed out first, shake counterclockwise
Start wheel 1103, handwheel 1103 is engaged by gear and imparts power to pull bar 1101, pull pull bar 1101 to move out,
Spindle nose bearing 26 is pulled to move out.After moving in place, by end bearing fixed bolt hole 28 and shifting bolt hole 27
Alignment, is screwed into bolt and fixes.By lifting gear, will suitably brake couple 10 and access axis system.Back out shifting bolt hole
Bolt in 27, shakes handwheel 1103 clockwise, then rocking bar 1106 rotates, and drives pull bar 1101 in place, and fixing bolt is tightened
To in the hole of end bearing fixed bolt hole 28, braking couple 10 is changed and completed.
When certain inertia disc 6 needs not participate in spindle operation, it is necessary to when removing rotary shaft, now by turn disc to used
Amount disk 6 on inertia disc bolt hole 21 with catcher it is corresponding with inertia disc link bolt hole 1402, be screwed into bolt and fix, make catcher and
Inertia disc 6 links together；Catcher inserts bearing pin during pin shaft hole 1401 is connected with piston rod, and it is recessed that pin shaft hole inserts piston rod simultaneously
In groove 18, catcher 1404 is set to be connected with piston rod.Catcher and system frame connecting bolt 17 are backed out, makes the detachment system of catcher 1404
Support 7, starts Hydraulic Station, and the inertia to combined oil cylinder departs from the fuel feeding of hydraulic cylinder 1203, while symmetrical oil cylinder is also synchronously loaded,
Liquid presses piston pole 13 is moved to off-direction.Catcher and system frame connecting bolt 17 are tightened, makes the connection system branch of catcher 1404
Frame 7, removes the bearing pin that catcher is connected in pin shaft hole 1401 with piston rod so that do not influence next piston rod movement, 6 points of inertia disc
It is not fixed in system frame 7 in two symmetrical catchers 1404.Sensing infrared switch 25 is perceived less than corresponding inertia
Disk 6, no longer embodies the rotary inertia of the inertia disc 6 in computer calculation procedure.The loading of remaining each inertia disc 6 is also identical
Operation.
Hydraulic loading system has four sets, is divided into two groups.The diameter of inertia disc 6 it is big be one group, it is front and rear each a set of；Inertia disc
Small one group, front and rear each one of 6 diameters.The load cylinder of the front and rear two sets of hydraulic systems in each group is communicated, and departs from oil cylinder phase
It is logical, it is ensured that loading and disengaging action are synchronously carried out.
The pilot system mainly has rotating speed acquisition system i.e. rotary encoder 1, variable frequency drive motors 2；Principal shaft braking disk 5；
Inertia disc 6；System frame 7；Leading portion main shaft 14, back segment main shaft 9；Braking couple 10 and braking couple more changing device 11 are constituted.
Above description is explanation of the invention, is not the restriction to inventing, and limited range of the present invention is referring to right
It is required that, within protection scope of the present invention, any type of modification can be made.
Claims (7)
1. a kind of low speed shaft brake efficiency test platform, it is characterised in that：Including base (12), fixed peace on the base (12)
Equipped with variable frequency drive motors (2), one end of the variable frequency drive motors (2) connects rotary encoder (1), the frequency conversion drive electricity
The other end of machine (2) is provided with leading portion main shaft (14) by first shaft coupling (3), and main shaft is provided with the leading portion main shaft (14)
Bearing (4), principal shaft braking disk (5) and multiple inertia discs (6), the termination of the leading portion main shaft (14) passes through second shaft coupling (8)
Back segment main shaft (9) is connected with, multiple inertia discs (6) are equally installed on the back segment main shaft (9), the back segment main shaft (9)
Afterbody is provided with braking couple (10), and described braking couple (10) rear end is provided with braking couple more changing device (11)；The bottom
Control inertia disc (6) connection and not connected inertia disk control unit are also equipped with seat (12).
2. low speed shaft brake efficiency test platform as claimed in claim 1, it is characterised in that：The inertia disk control unit
Structure is：Including system frame (7), the system frame (7) is fixed on base (12), one end of the system frame (7)
Assembled hydraulic cylinder body (1202) is installed, the two ends of the assembled hydraulic cylinder body (1202) are respectively inertia loading hydraulic cylinder
(1201) and inertia departs from hydraulic cylinder (1203), the output end of the assembled hydraulic cylinder body (1202) is liquid presses piston pole (13),
Interval is provided with multiple catchers (1404) on the liquid presses piston pole (13), and each catcher (1404) connects with inertia disc (6) respectively
Connect.
3. low speed shaft brake efficiency test platform as claimed in claim 2, it is characterised in that：It is provided with the catcher (1404)
Catcher and inertia disc link bolt hole (1402), an inertia disc bolt hole is provided with the outer circumference surface of the inertia disc (6)
(21) multiple inertia disc fixed bolt holes (22), are provided with the inertia disc (6)；By bolt just both link together；
The front end of the catcher (1404) is provided with connecting plate (19), and the connecting plate (19) is by catcher and system frame connecting bolt
(17) fixed, the top of the connecting plate (19) is locked by connecting plate fixing bolt (20)；On the liquid presses piston pole (13)
Groove (18) is also provided with, and groove (18) and catcher are connected with piston rod by pin shaft hole (1401) by bearing pin and connected；The liquid
The end of pressure piston rod (13) is also equipped with piston rod bearing (15) and piston rod stroke is spacing (16).
4. low speed shaft brake efficiency test platform as claimed in claim 2, it is characterised in that：The assembled hydraulic cylinder body
(1202) inertia is respectively arranged with and loads oil pipe (1204) and inertia disengaging oil pipe (1205).
5. low speed shaft brake efficiency test platform as claimed in claim 2, it is characterised in that：The inertia disc (6) it is another
End is additionally provided with mounting bracket (23), and infrared switch (25) is fixed with by fastening screw (24) on the mounting bracket (23).
6. low speed shaft brake efficiency test platform as claimed in claim 1, it is characterised in that：The braking couple more changing device
(11) structure is：Support (1104) is fixed with the base (12), the support (1104) is provided with cabinet, the cabinet
Interior is gear mechanism (1102), and one end of the cabinet connects handwheel (1103), and the handwheel (1103) is by rocking bar (1106)
It is connected with gear mechanism (1102), the other end of the cabinet connects pull bar (1101), the pull bar (1101) and main shaft
The bearing block connection of end bearing (26), is provided with end bearing fixed bolt hole (28) and shifting bolt hole on the bearing block
(27), the bottom of the bearing block is provided with rail plate (1105).
7. the method for testing of the low speed shaft brake efficiency test platform described in a kind of utilization claim 1, it is characterised in that：Including
Following operating procedure：
The first step：During experiment, the braking moment size according to tested brake, according to JB/T10917《Spot-type disc brake》Meter
Calculate the total rotary inertia for needing loading；
Second step：Further according to parts rotary inertia, each inertia disc rotary inertia in rotary shaft inertia, rotating shaft, it is determined that needing
The inertia disc (6) of access；
3rd step：Start inertia disc hydraulic loaded and control system, it would be desirable to which the inertia disc (6) of access accesses rotating shaft, it is not necessary to
Inertia disc (6) depart from main shaft；
4th step：Tested brake is clamped into braking couple (10)；
5th step：Start variable frequency drive motors (2), be tested brake jaw and open, when the braking that the speed of mainshaft reaches setting is removed
After rotating speed, motor power-off, brake, tested brake is also powered off, and tested brake jaw steps up to brake couple, whole experiment
Platform rotary system slowly stops, in the process, rotary encoder (1) Real-time Collection rotating speed, and it is continuous at equal intervals by computer
Collection tach signal n0, n1, n2, n3, n4... ... nn-1；Computing in groups is carried out by computer and braking moment curve and correlation is generated
Test report, Computing model is as follows：
Mb- it is Brake Mean Power square
In formula：Mbd1, Mb2, Mb3... ..., Mn--- first paragraph, second segment, the 3rd section ... ..., n-th section of Brake Mean Power square
(N.m)；
J --- total rotary inertia, kg.m on brake axle2；
n0--- the first rotating speed of braking, r/min；
n1, n2, n3... ... nn, --- first paragraph brakes end speed, second segment braking end speed, the 3rd section of braking end speed ... ...
N-th section of braking end speed, r/min；
T --- first paragraph, second segment, the 3rd section ... ..., n-th section of time value, point value, such as whole braking such as each section of use
Process is divided into 100 sections, then t is the 1/100 of whole braking time；η --- the total efficiency of bearing of testing stand, takes 0.95；
Computer system calculates acceleration, braking moment is calculated by data such as inertia and acceleration, according to drag friction
Effective radius calculates brake force, so that brake efficiency test is used.
In formula：
FbThe effectual brake force of-separate unit brake, unit is ox (N)；
MbThe braking moment of-separate unit brake, when the braking moment that experiment is measured is more than the braking moment that product nameplate is demarcated,
MbIt is the braking moment that product nameplate is demarcated, otherwise, MbIt is observed brake horsepower square, unit is ox rice (N.m)；
R-theory braking radius, unit is rice (m)
Computer system calculates acceleration, braking moment is calculated by data such as inertia and acceleration, according to drag friction
Effective radius calculates brake force, so that brake efficiency test is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138244.XA CN106706306B (en) | 2017-03-09 | 2017-03-09 | Low-speed shaft brake energy efficiency test board and test method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710138244.XA CN106706306B (en) | 2017-03-09 | 2017-03-09 | Low-speed shaft brake energy efficiency test board and test method thereof |
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| CN108918313A (en) * | 2018-07-10 | 2018-11-30 | 安徽悦众车身装备有限公司 | A kind of detection device for automobile brake disc durability |
| SE1850663A1 (en) * | 2018-06-01 | 2019-12-02 | Scania Cv Ab | Method for diagnosing a transmission brake, control device, vehicle, computer program and computer-readable medium |
| CN111308932A (en) * | 2020-02-25 | 2020-06-19 | 北京百度网讯科技有限公司 | Calibration method, device and equipment of brake system and storage medium |
| CN111366364A (en) * | 2020-04-13 | 2020-07-03 | 中国人民解放军63921部队 | Method and device for testing performance of brake for low-speed heavy-load equipment |
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| CN113911387A (en) * | 2021-09-13 | 2022-01-11 | 北京精密机电控制设备研究所 | Cam type airplane cabin door load simulation device and method |
| CN106706306B (en) * | 2017-03-09 | 2023-07-18 | 江苏省特种设备安全监督检验研究院 | Low-speed shaft brake energy efficiency test board and test method thereof |
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| WO2023035342A1 (en) * | 2021-09-13 | 2023-03-16 | 北京精密机电控制设备研究所 | Cam type airplane cabin door load simulation device and simulation method |
| CN113911387A (en) * | 2021-09-13 | 2022-01-11 | 北京精密机电控制设备研究所 | Cam type airplane cabin door load simulation device and method |
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