Some standard content:
H's53.1Q0
Machinery Industry Standard of the People's Republic of China
JB/F9726-2001
Road milling machine
Test methods
Road milling machineTest methods2001-06-22Promulgated
China Machinery Industry Federation
2001-10-01Implementation
JB/T9726—2001
No. 2: Standard
Test preparation
4 Test method
S Test result arrangement
Appendix A (Standard presentation and test record form
JB/T9726-2001
This standard is a revision of 1B9726:1999 Road milling machine test method. This standard is a revision of 1B9726:1999 Road milling machine test method. Compared with JB/T9726-1999, the main technical contents of this standard are as follows: the content of the measurement of the recovery belt of the transmission and the measurement of the return rate has been added; the content of the measurement of sealing, lubricating oil and hydraulic oil clarity and oil temperature has been added; the working quality measurement, the specific methods of the center of gravity position measurement, the rotational length measurement and the description of the "precision requirements of the measuring plate" in Table 1 have been cancelled, and all have been replaced by the provisions of relevant standards; the slope angle in the slope energy measurement and the slope angle in the vehicle braking measurement are both 15% or greater; the noise measurement now provides two measurement methods: the city level and the sound power level Test method: The disassembly inspection and other regulations after the prototype test are cancelled; the test state of the steering wheel rotation angle and the operating force stroke is changed to the free speed state; the test time of the industrial test is changed to 200 hours, and the follow-up operation time is changed to no less than 100 hours; Appendix A is added, and the test record tables in the main text are included in Appendix A. Appendix A of this standard is the appendix of the standard.
This standard replaces JB/T9726-1999 from the date of implementation. This standard is proposed and coordinated by the Mechanical Industry Engineering Machinery Standardization Technical Committee. This standard was drafted by Location: Tianjin Engineering Machinery Research Institute, Jianghua Sizhi Road Pavement Machinery Co., Ltd., Xuzhou Cheng Machinery Manufacturing Co., Ltd. The main drafters of this standard: Wang Qing, Wu Shourong, He Ruji, Zhibin, Ying Qiyou, Yang Yaohao, Wu Runcai. This standard was first issued in March 1988 as 2BJ85008-88, and the standard number was revised to B/T9726-1999 in August 1999. This is the first revision.
1Fan Guo
Mechanical Industry Standard of the People's Republic of China
Test Methods for Pavement Milling Machines
Road illizg macbineTest nethodsThis standard specifies the test methods for wheeled pavement planers. JB/T9726—2001
Represents J8/T9726—1999
This standard is applicable to wheeled pavement planers (hereinafter referred to as milling machines). Cavity-belt pavement planers can be used as a reference. 2 Reference standards
The clauses contained in the following standards are not cited in the standards and constitute the clauses of this standard. When the standard is published, the versions shown are valid. All standards will be revised. Departments using this standard should explore the possibility of using the most updated version of the following standards. GB/T 85922001
GB/T16710.21996|| B/T 3873—I999
JB.7690—1995
JG/T 69—1999
JG/T 70--1999
3 Test preparation
3.1 Technical data
Determination of steering dimensions of earth-moving machinery; Determination of external radiated operating noise of the machine under stationary test conditions; Determination of noise at the driver's position under stationary test conditions of mechanical equipment; Determination of noise at the driver's position under dynamic test conditions of engineering machinery; Method for measuring the mass of earth-moving machinery and its working parts; Method for determining the position of the center of gravity of the machine
Method for measuring dimensions and performance of the machine area; Microscope counting method for measuring particles of pollutants in the lubricating fluid; Milling machine operating and maintenance instructions, main parts b) The test milling machine should have a bench performance test report of the engine, main clutch, transmission, overpressure and hydraulic valve and product certification.
3.2 Test prototype
3.2.1 Provide at least one test prototype, first conduct the whole machine performance test, and then put it into industrial test. 3.2.2 Before the test, the prototype should be in normal working condition. Fill in the main performance data (design value) of the prototype in Table A of Appendix A (standard test record).
3.3 The measuring instrument only needs to have measurement accuracy
3.3.1 The measuring instrument should be calibrated regularly according to technical specifications and approved by the statutory metrology department1. The instrument should be inspected before each test. 3.3.Z For various direct test parameters, if there is no special instruction, the average value of three measurements shall be taken. The accuracy shall comply with the specification of JET7690. Approved by China Machinery Industry Federation on June 22, 2001, and implemented on October 1, 2001. 3.4 Test site JB/T9726-2001 a) The fixed test site shall be a flat and solid ground. Within the maximum size of the prototype, the slope width of the ground in each direction shall not exceed 0.5% and the flatness shall not exceed 3 mm b) The traction, driving and driving test site shall be a flat ground with good adhesion performance, with a longitudinal slope of no more than 0.5% and a transverse slope of no more than 2%. The length of the track should not be less than 10 meters, and the width should not be less than 2 times the width of the machine being tested; 1) The turning test site should be a compacted or paved ground, which has good adhesion to the tire grease, can clearly show the tire curve and will not be damaged by the turning of the machine. The test site should be semi-flat, with a slope of no more than 3% in each direction, and the field size should be able to meet the full-circle movement of the prototype:
d) The climbing and slope braking test site should be a fully compacted asphalt concrete or cement concrete (it is allowed to test on a solid soil slope), with a slope of 15% or the maximum design slope, and the road length should exceed 3% of the entire machine length, of which the slope before the run-in section should be 1.5 times the machine length, and the road width should be greater than 2 times the width of the prototype. 4 Test method
4.1 Determination of main geometric dimensions
4. 1.1 Determination conditions
a) The prototype is the working quality of the whole machine, and the state is as shown in Figure 1: Figure! Determination of main geometric dimensions of the machine
b! The test site meets the requirements of 3.4a),
4.1.2 Only instruments and equipment
Im ruler, Sm ruler, plumb line, etc.
4.1.3 Determination method
JB/T9726—2001
The prototype is parked on the measurement site, and the steering wheel is in a straight position (steering is zero), and the various parameters in Figure 1 and Table A2 are measured and recorded.
4.2 Working quality measurement
4.2.1 Measurement conditions
a) The machine is the working quality of the whole machine:
b) The engine is ignited and the brake is relaxed;
) The load is increased and the quantity is reduced to the limit position
4.2.2 Measurement method
According to the provisions of JB/F3690, the measurement results of the items in Table A3 are recorded in Table A3. 4.3 Tire lift ratio measurement
4.3.1 Measurement conditions are in accordance with 4.1.1,
4.3.27 The indentation area and horizontal projection area of each wheel are measured by the indentation method (see Figure 2). The tire contact ratio is determined according to formula (1) and formula (2). Measurement and calculation are recorded in Table A4
Where:
average indentation pressure, kPa;
—average projection ratio K, kPai
M machine mass, k!
-gravity acceleration, m/s;
—the sum of the indentation area occupied by all tires, M; the sum of the horizontal projection areas of all tire convex parts and concave parts, m. Figure 2 Tire indentation area
4. Determination of center of gravity
4.4. 1 Lubrication conditions
Determination conditions shall be in accordance with the provisions of 4.2.1
4. 4. 2 Determination method
Determination method shall be in accordance with the provisions of JB/T3873, and the measurement results shall be recorded in Table A3. 4. Determination of average operating force and stroke of S-type control machine 4.5.1 Determination conditions
a) The prototype is the working quality of the whole machine:
b) The engine is in a disconnected state.
4. 5,7 Instruments and equipment
Measuring instrument, pedal dynamometer, tape measure, ruler, etc. 4. 5. 3 Determination method
JB/T5726--2001
The dynamometer (variable plate dynamometer) is placed at the force point of the selector lever or the selector plate. During the measurement, the joystick or pedal is pulled (or pressed) uniformly from the starting position to the rest position at a positive speed, and the maximum value of the force is read. The stroke is the linear movement distance of the measuring point. The braking force and stroke are measured during the driving brake test. The measurement results are recorded in Table A6.
4.6 Steering wheel rotation number determination
4.6.1 Determination record
) The engine speed of the prototype is at the desired speed state: b) The prototype cannot run,
4.6.2 Determination method
Turn the steering wheel and measure the steering wheel rotation number when the steering wheel turns from the true steering position to the left (left) limit position. The test results are recorded in Table A7
4.7 Determination of steering dimensions
4.7.1 Determination conditions
a) The prototype is a complete machine 1. Working weight:
b) The machine is raised to the product position:
c) The test site is 3.4cJ.
4.7.2 Determination method
The outer tire passing diameter and transition diameter of the prototype are measured in accordance with the provisions of 7.1 and 7.2 of GBT8592-2001. The test results are recorded in Table A8.
4.8 Milling performance test
4.8.1 Non-operating condition test of control device
4.8. [,] Test conditions
The prototype is a complete working mass disk,
4.8.1.2 Receiver equipment
Tape measure, speed sensor, oscilloscope, stopwatch, 4.8.1.3 Test method
a When the prototype is at the calibrated speed, measure the speed of the defective machine, and the test stabilization time shall not be less than 10s. The test results are recorded in Table A9. b) Determine the maximum lifting height and lifting time of the milling machine from the ground, and the test results are recorded in Table A9; d) Stop the milling drum when it is lifted to the highest limit position, and then measure the settlement of the lifting pressure: the test results are recorded in Table A9, 4.8.2 Planing operation performance test
4,8,2.1 Test conditions
The prototype is the working quality of the whole machine
4.8.2.1 Feeder equipment
JB/F9726-20U1
Strain gauge, oscilloscope, stopwatch, torque sensor, collector ring, tape measure, ruler, gauge, speedometer, etc. 4.8.2.3 Test method
The prototype is in horizontal running state, the engine throttle is in the maximum fuel supply position, and it enters the test area at low gear speed. The milling operation is carried out at different locking depths (which can be divided into three or four detection levels according to the design value of the maximum milling depth of the prototype) to measure the input torque of the milling drum and the speed of the milling drum. If the milling drum is a prototype with a grip transmission, the travel speed is adjusted to the maximum speed that can make the prototype travel at a fixed speed under the above conditions. After the test, the working oil flow of the milling drum drive motor, the milling width, milling depth, milling distance, milling flatness and planing straightness are measured, and the test results are recorded in Table A10: The effective recording time of each condition is not less than 209
Calculate the milling rate of each working condition according to Formula [3] and Formula [4], and the test results are recorded in Table A10. M,n
Where: W—milling package power, w
Effective input shaft torque, Nm:
Equipment speed, r/min;
Milling drum motor L force, MPa;
Motor flow rate, Limin;
Total efficiency of milling hydraulic motor:
1Total transmission efficiency of reducer
Transmission ratio of reducer.
According to formula (5) and formula (6), calculate the production traction of each workstation, hourly operating fuel consumption rate, and record the result in table A10, ×3600
Where: W—productivity, m/h:
——volume of the milled road surface. And:
7—milling time. 5;
G——hourly operating fuel consumption,
G,—fuel consumption, &
name——fuel consumption rate, g/ml.
4.9 Gradeability test
4. 9. [Test conditions
a) The prototype is a complete machine T. For weight plate:
b) The milling device is not in the highest position;
c) The weather is not sunny, and the wind speed does not exceed 5m/s
d) The test site is in accordance with 3.4d).
4.9.2 Instruments and equipment
/9726-2001
Tape measure, benchmark, angle meter, second meter, anemometer, etc. 4. 9. 3 Test piece
4.93.! After the prototype approaches the climbing starting point at a stable minimum speed, quickly put the engine throttle at the maximum fuel supply position and start climbing. Record the time and distance of passing the test area, calculate the climbing speed according to formula (8), and record the test results in Table A1. a*3.gt
In the formula, the central climbing section distance. m;
——the time of passing the section,
βThe average slope, ()
——climbing speed, km/ho
4.9.3.2 The prototype climbs the slope at a low and maximum throttle, stops for more than 1Us in the middle, and then restarts. The situation is recorded in Table A1l. 4.10 Parking brake test
The prototype is tested on the test model that meets the requirements of 3.4d) for uphill and downhill parking brakes. After the engine is fully braked, it is restarted. After the test is 10mm, the sliding distance is measured and the test results are recorded in Table A124.11 Service brake test
4.11.1 Test conditions
a) The prototype is the working quality of the whole machine:
b) The highest position of the lifting system of the integrated device: ||tt ||c) No rain, wind speed does not exceed 5m/s: d1 test site access 3.41;
) The initial braking speed is specified as the highest vehicle calibrated by the prototype: 4.11.2 Instruments and equipment
Five-wheel compensation, anemometer, yellow ruler, benchmark, etc. 4.11.3 Test month elimination
) When the prototype is calibrated at the initial braking speed, brake immediately, and then measure the disc to send a signal to drive to a complete stop, and record the results in Table A13.
b) The measured initial braking speed should be stable within the ±10% range of the specification, and use formula (9) to repair and stop, and the results are recorded in Table A! 3.9)
Where: Braking stopping distance after correction, m; L: — Actual braking stopping distance, m; v: — Specified starting braking speed, km1:
— Actual starting braking speed during the test, km/h; JB/T9726-2001
c: Calculate the braking reduction gradient (α) according to formula (10) and record the results in Table A13.25.9L.
Formula: Braking speed, 4, 12 Driving speed setting
4. 12.1 Test conditions
Same as 4.11.)-d),
4.12.2 Instruments and equipment
Five-wheel instrument, wind gauge or stopwatch, tape measure, benchmark, etc. 4.12.3 Test method
a, during the test, the engine throttle is at the maximum position h) after the sample is moved horizontally, enter the 50m test section, measure the speed of each gear, go back and forth three times each, calculate the first gear speed according to formula (11), and record the results in Table A14, V.-3.6 x
Formula: n.——maximum actual speed, ktm/h; L actual distance, m;
——average time of passing the measured distance, 9. 4. [3 Efficiency test
4. 13. 1 Test system
Same as a)-d) in 4.11.1!, the test environment is changed to 5-35℃. 4.13.2 Receiving equipment
Load microcar, dynamometer, wire rope, etc.
4.13.3 Test method
The engine is in the parking position, and the prototype is connected to the load vehicle as the power equipment through a dynamometer (see the figure). The traction point height of the load vehicle should be consistent with the prototype hanging height to ensure that the traction channel and the longitudinal axis of the prototype coincide and are parallel to the road surface. There should be no obvious deviation during the test.
Figure 3 Traction test
During the test, the gears are fixed at different speeds, and the load vehicle is gradually increased after each start. The load vehicle should ensure stable traction, and the fluctuation of the average traction should not exceed ten percent. The loading should be graded from the minimum traction to the maximum traction. During the process, the following data should be continuously recorded: travel time and passing distance (or speed), fuel consumption, engine and drive wheel speed values, and the average value for more than 5s. The test should be conducted once in both the forward and reverse directions. The test results are calculated by (12)-(17) and recorded in Table A15, and the characteristic load curve of the traction is calculated.
a) Average driving speed
#, =3.6 x
Where: V—average driving speed, km.h; L.—distance traveled through the test section, m;
—time traveled through the test section, s
6) Rolling radius
Where: w
—the sum of the number of rotations of the test section. Traction power
Where: P·power, kw
F-average value of traction force. N.
) Fuel consumption
Total fuel consumption of the test section, B
Time of the test section, s.
! Traction fuel consumption ratewwW.bzxz.Net
Where:
Traction fuel consumption rate, (kw·h)
f) Mechanical slip rate
Mechanical slip rate:
Where:
×100%
Diagnosis——Theoretical vehicle speed without lag calculated according to the suction wheel speed during the test, km/h. 4.14 Determination of maximum traction force 4.14. 1 Test summary 4.13.1, 4.14. 2 Test equipment 4.13.2. (17) 4.14.3 Test method JA/9726—2001 Engine oil: In the maximum supply position, drag the load vehicle at a low speed. After the speed stabilizes, start to increase the load vehicle steadily until the prototype cannot move. At this time, measure the average value of the 3s traction time as the maximum traction force. The test should be conducted more than once in both directions, and the average value should be taken as the maximum variable gravity. The result should be recorded in Table A16. 4.15 Sound measurement
4.15.1 Sound pressure destruction method
4. 15. 1. 1 Test conditions
) There should be no people or other obstacles between the microphone and the prototype, and there should be no obstacles affecting the sound field near the microphone. The test personnel should observe in a place that does not affect the reading of the sound meter; b) The prototype is the working quality of the whole machine, and the engine throttle is at the maximum fuel supply position; c) The weather is intolerant, and the wind speed is not more than 3m/s. 4. 15. 1. 1 Measurement point location
a) Driver's ear:
b] Both sides of the center of the tested prototype 7.5m away, 1.5m above the ground, 4.15.1.3 Instruments and equipment
Sound level meter, anemometer, tachometer, tape measure, etc. 4.15.1.4 Test method
) Use the sound level "A" weighting network for measurement:
] Measure the noise of each measuring point in the static and dynamic states of the prototype respectively when the material is passed through the test area at the highest speed and half the full depth of the unified depth, and record the test results in Table A17. 4.15.2 Sound power age method
4.15.2.1 Test conditions
The prototype is a complete machine. 1. The engine throttle is in the high-volume fuel supply position. The test environment meets the requirements of Chapter 1 of GBT16710.2-1996:
4.15.2.2 Test method
The noise of each measuring point of the prototype is measured in static and dynamic conditions (passing through the test area at the highest speed and half full-depth milling operation) respectively. The test is carried out according to the methods specified in GB/T167102~16710.5 [refer to wheel bulldozer]. The test results are recorded in Table AIB.
4.16 Vibration test measurement
4. 16.1 Test parts
The prototype is a complete machine. Working quality:
4.16.2 Equipment
Vibration measurement, etc.
4.16.3 Test method
The engine is in maximum fuel supply, in the parking state (other mechanisms are not operating), in the gear operation state and in the high gear driving state, respectively.
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