Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T7304-94
Road Sweeper
Published on July 18, 1994
Test Method
Implementation on July 1, 1995
Ministry of Machinery Industry of the People's Republic of China
Subject Content and Scope of Application
Cited Standards
3 Test Conditions
Determination of Main Structural Parameters
5 Driving Performance Test
Sweeping Performance Test
Lifting and Unloading Performance Test
8 Safety and Environmental Protection Index Measurement
9 Reliability Test| |tt||10.Test report
11 Technical appraisal
Performance test record sheet (supplement)
Appendix A
Fault definition (supplement)
Appendix B
Appendix C
Reliability test record sheet (supplement)
（1）
（7）
.（8）
（9）
（10)
（24）
Machinery Industry Standard of the People's Republic of China
Road sweeper
1 Subject content and scope of application
Test method
JB/T 730494
This standard specifies the whole machine performance test and reliability test methods for road sweeper (hereinafter referred to as sweeper). This standard applies to the performance test and reliability test of new products, modified products or old products with major improvements before they are put into mass production.
The regular inspection of products can also refer to this standard for testing. 2 Reference standards
GB1334
GB1496
GB3845
GB3846
GB/T12534
GB/T12536
GB/T12537
GB/T 12539
GB/T 12540
GB/T12543
GB/T12544
GB/T12545
GB/T12547
GB/T12673
GB/T12676
JB/T7303
3 Test conditions
3.1 Preparation before the test
Road test method for Anzhong and off-road vehiclesMethod for measuring noise from motor vehicles
Method for measuring speed pollutants of gasoline vehicles
Method for measuring free acceleration smoke density of diesel vehicles
General rules for road test methods for vehicles
Vehicles Vehicle coasting test method
Vehicle traction performance test method
Vehicle steep slope climbing test method
Vehicle minimum turning diameter determination method
Vehicle acceleration performance test method
Vehicle maximum speed test method
Vehicle fuel consumption test method
Vehicle minimum stable speed test method
Vehicle main dimension measurement method
Vehicle braking performance test method
Road sweeper, technical conditions
3.1.1 Two sweepers are provided for the test, one is directly subjected to reliability test, and the other is put into reliability test after completing performance test. The sampling method shall be carried out in accordance with the provisions of JB/T7303. The main technical parameters of the sweeper shall be registered in accordance with the requirements of Table A1 in Appendix A (Supplement).
The following technical information should be provided:
Instruction manual and product manual of the sweeper: Technical conditions and acceptance certificate of the sweeper before leaving the factory: b.
Each assembly, component, attachment and auxiliary equipment, hydraulic accumulator valve specified in the sweeper equipment should provide a bench test report or product certificate:
Approved by the Ministry of Machinery Industry on July 18, 1994
Implemented on July 1, 1995
d. Others shall comply with the provisions of JB/T7303.
JB/T7304-94
3.1.3 The tire pressure of the sweeper shall comply with the regulations of the manufacturer, and the error shall not exceed ±10kPa. 3.2 Requirements for the test site
The road for the performance test of the sweeper shall comply with the provisions of GB/T12534. The reliability test of the sweeper shall be carried out on a flat and solid asphalt or cement road surface, and the road width shall not be less than twice the sweeping width. 3.3 Requirements for climatic conditions
The climatic conditions shall comply with the provisions of GB/T12534. 3.4 Running-in specifications
3.4.1 The road for the running-in of the sweeper shall be a flat and hard road. 3.4.2 During the running-in period, maintenance and inspection of the tightness of each component shall be carried out in accordance with the provisions of the sweeper instruction manual. If any fault is found, it shall be eliminated in time and recorded in Appendix C (Supplement) Table C1.
The running-in time of the sweeper shall not be less than 60 hours, and the load and speed of the running-in shall be in accordance with the provisions of Table 1. 3.4.3
Table 1 Running-in speed and load
Travel time h
50% of rated load
75% of rated load
The running-in operation shall be carried out in accordance with the provisions of Table 2.
Table 2 Running-in working conditions
Sweeper and fan or
Hydraulic speed
80% of the design value
Design value
Self-unloading sweeper lifts the garbage container once every 3 minutes of suction and sweeping. Non-self-unloading sweeper works continuously
Speed of corresponding engine
Not exceeding 50% of the rated speed
Not exceeding 50% of the rated speed
Not exceeding 75% of the rated speed
Not exceeding the rated speed
Number of cycles of self-driving sweeper
Operating time of non-self-driving sweeper
3.4.5 After the running-in operation is completed, clean or replace the filter element, replace the hydraulic oil and the lubricating oil of the transmission parts of the working device, and lubricate all lubrication points. 3.5 Preparation of measuring instruments
The instruments, meters and measuring tools used in the test shall be calibrated as required before measurement, and their accuracy requirements are as follows: angle measurement using an angle measuring instrument, the accuracy shall not be less than ±30°; b.
time measurement using a stopwatch, the accuracy shall not be less than ±0.1s; speed measurement using a tachometer, the accuracy shall not be less than ±10r/min: tire pressure measurement using a barometer, the accuracy shall not be less than ±10Pa: temperature measurement using a thermometer, the accuracy shall not be less than ±1°C; air velocity measurement using an anemometer, the accuracy shall not be less than ±0.1m/s; length measurement using a ruler, steel tape measure and soft ruler, the accuracy shall not be less than ±1mm: weight measurement using a ground balance, the accuracy shall not be less than ±0.5%. 3.6
Appearance quality inspection
Appearance quality inspection shall be carried out in accordance with JB/T7303. Determination of main structural parameters
Weight of the whole machine and distribution of bridge load
4.1.1 Measurement conditions
The sweeper is cleaned and dirt is removed: JB/T730494
According to the instructions for use, add water and bring the accompanying tools: measure under both empty and full load conditions. When fully loaded, in addition to the materials with a density of 0.4-0.6g/cm3 and a total volume equal to the effective volume of the sweeper's garbage container (the materials are evenly arranged in the horizontal direction), the total weight of the driver and passengers is configured according to the machine's capacity (hand-push sweepers do not include the weight of the operator).
When measuring, the engine is turned off, the transmission is in neutral, the brake is released, and the triangular wood is not allowed to be used to support the vehicle. Weigh the weight using a scale or a weight sensor with considerable accuracy. The parking surface (weighing platform) of the sweeper shall be horizontal. The weighing platform shall be able to place the entire sweeper on it. The ground around the weighing platform and the release platform shall be on the same plane. 4.1.2 Measurement method
4.1.2.1 Measurement of weight parameters under no-load condition
The sweeper drives onto the weighing platform from one direction, and weighs the front axle weight G, the whole machine weight G' and the rear axle weight G of the sweeper in turn. Then turn the sweeper around and weigh the front axle weight G, the whole machine weight G\ and the rear axle weight G" in turn from the opposite direction. The sweeper drives toward the weighing platform from one direction, so that the left wheels of the front and rear axles are on the weighing platform, and the right wheels are on the ground adjacent to the weighing platform. Weigh the left side weight G of the sweeper. Then turn the sweeper around and drive toward the release platform from the opposite direction, so that the left wheels of the front and rear axles are on the weighing platform, and the right wheels are on the ground adjacent to the weighing platform. Weigh the left side weight G of the sweeper". The same method is used to weigh the right side weight Gz' and G". For three-wheeled sweepers, when weighing G', G", G\, and G\, the middle wheel should be parallel to the machine body and chiseled on the ground near the scale together with the left or right wheel.
4.1.2.2 Measurement of weight parameters under full load condition
Measurement direction According to the measurement results in 4.1.2.1, the front axle weight G. and G.\, the whole machine weight G and G,\, and the rear axle weight G. and G.\. The weight on the left is G and G.*\, and the weight on the right is G. and G." 4.1.3 Calculation method
According to the measurement results, the weight parameters of the sweeper under no-load condition are calculated according to formulas (1) to (7), and the weight parameters of the sweeper under full-load condition are calculated according to formulas (8) to (14), and the calculation results are recorded in Table A2. In the formula: G is the weight of the whole machine under no-load condition, kg;
is the weight of the whole machine under no-load condition (measured value), kg. e
In the formula: e,—no-load front axle load rate, %: G'G,\-
no-load front axle weight , kg:
Unloaded rear axle weight, kg.
Where: G,-—Unloaded front axle weight, kg. Where,-
Unloaded rear axle load rate, %.
Where, GUnloaded rear axle weight, kg.
+G×100
(Gs+G)
（2）
（5）
Where, Gt
Unloaded left side weight, kg
G',Gt\
Where: G has
JB/T 730494
Unloaded left side weight (measured value), kg. Gt
-Unloaded right side weight, kg:
(Gz+G
G\, Gz\
Unloaded right side weight (measured value), kg. G, =
Where, G.-
Fully loaded machine weight, kgt
G\G\—Fully loaded machine weight (measured value), kgE
-Fully loaded front axle load rate, %:
Where, .-
G.\, G.\—Fully loaded front axle weight, kgG.G.\
Fully loaded rear axle weight, kg.
Where: G.— Fully loaded front axle weight, kg. Where: .
Fully loaded rear axle load rate, %.
Where: G.--Fully loaded rear axle weight, kg
(G'+G\）
G+GX100
Where: G.Car--Fully loaded left side weight, kg; G'G\
Where: G.-
(Gleft'+G±\）
Full Left side weight when loaded (measured value), kg. Gt*
Right side weight when fully loaded, kg
4.2 Position of center of gravity
（Gt'+G\）bzxz.net
Right side weight when unloaded (measured value), kg. 4.2.1 The horizontal ordinate of the center of gravity is calculated according to formula (15) and formula (16), and the result is recorded in Table A3G
Where: L
Where: L
Horizontal distance from the center of gravity to the center line of the front axle when unloaded, mm Wheelbase when unloaded, mm.
Horizontal distance from the center of gravity to the center line of the front axle when fully loaded, mm; Wheelbase when fully loaded, mm.
（14）
JB/T7304—94
4.2.2 The horizontal abscissa of the center of gravity is calculated according to formula (17) and formula (18), and the result is recorded in Table A3. e
A,(Gt-Gt）)
2(Geast+G)
——Approximately take the arithmetic mean of the front wheel track and the rear wheel track, mm; Where: A,-
——The wheelbase of the center of gravity deviating from the left side of the center line when unloaded, mm. e
A(G,&Gt)
2(G+G）
Where: e——The distance of the center of gravity deviating from the left side of the center line when fully loaded, mm, Note: When a negative value appears, it means that the center of gravity is on the right side of the center line. When the result is 0, it means that the center of gravity is on the center line. (17)
For a three-wheeled sweeper, the extended line of the center of the middle wheel when it is parallel to the frame is taken as the center line of the whole machine. The horizontal coordinate of the center of gravity is calculated according to formula (19) and formula (20), and the result is recorded in Table A3. e
Where: B, Bright-
(GB—GgB）
(G + G)
-are the distances from the left and right wheels to the middle wheel when unloaded, mm. (GB±—GBz)
（G车+Gt）
Where: Bahe, Bt\
4.2.3 Center of gravity height
are the distances from the left and right wheels to the middle wheel when fully loaded, mm. 4.2.3.1 Measurement method
Use the weight transfer method to measure the center of gravity height. When the sweeper is unloaded, place the rear wheels on the scale and the front wheels on the horizontal ground outside the scale. First weigh the rear axle weight G: when the sweeper is horizontal. Then raise the front axle to make the sweeper tilt longitudinally by 7*~15\. Weigh the rear axle weight G after tilting. Before measuring, the static radius and tilt angle of the rear wheel are used to calculate the center of gravity height using formula (21). Measure three times without tilting (7°~15*). The relative error of the three calculated values is no more than 5%. Take the average value and record the result in Table A3. h
[z,tga(G,\-G,) +G\(r ~r,)+r,where: h--—height of center of gravity when unloaded, mm; α—longitudinal tilt angle of sweeper, (*): G,\weight base of rear axle when unloaded and tilted, kgt
r.-average static radius of unloaded front wheel, mm
-average static radius of unloaded rear wheel, mm
·(21)
When measuring the height of center of gravity h, when the full load is measured, the solid material with density of 0.4～0.6kg/cm and total volume as effective volume value in the garbage container of sweeper is required to be evenly arranged in horizontal direction, and there is no relative movement between the material and the garbage container during the measurement of center of gravity height. The height of center of gravity h, when fully loaded is calculated according to formula (22), and is measured three times at different tilt angles (7°～15°). The relative error of the three calculated values is not greater than 5°. The average value is taken and the result is recorded in Table A3. h,
[z,ctga(G.\ -- G,) + Ga\(r.. r.)] + r.. Where: h.-height of center of gravity when full load, mm; G.\weight of rear axle when fully loaded and tilted, kg
ra——average static radius of fully loaded front wheel, mm; raa
-average static radius of fully loaded rear wheel, mm. (22)
4.2.4Based on the measurement and calculation results of 4.2.1.4.2.2 and 4.2.3, calculate the static longitudinal and lateral stability coefficients of the sweeper according to formulas (23) to (26), and record the calculation results in Table A3. L
Where,
Where:-
-longitudinal stability coefficient of no load.
longitudinal stability coefficient of full load.
Where, 7-lateral stability coefficient of no load
JB/T 730494
b——The minimum lateral horizontal distance from the center of gravity to one side of the wheel when unloaded, except for three-wheeled sweepers, it can be approximately taken as 5mm.
Wherein,
——Fully loaded lateral stability coefficient:
——The minimum lateral horizontal distance from the center of gravity to one side of the wheel when fully loaded, except for three-wheeled sweepers, it can be approximately taken as 6, mm.
4.3 Geometric dimension parameters
4.3.1 The method for determining the external geometric dimensions shall refer to the provisions of GB/T12673, and the measurement results shall be recorded in Table A4. 4.3.2 Determination of water tank capacity
-le,l,
（26）
Add clean water to the water tank of the sweeper, the water level is the maximum height specified in the design, and measure the added water volume (i.e. water tank capacity): Record the measurement results in Table A4,
4.3.3 Measurement of effective volume of garbage container
Add garbage to the garbage container, the garbage volume is the specified effective volume, weigh the weight of the whole vehicle before and after adding garbage on the ground scale, calculate the effective volume of the garbage container according to formula (27), and record it in Table A4. G,
武中,V-
Effective volume of garbage container m\:
G,—weight of the whole machine after adding garbage, kg:—density of garbage, kg/m3.
5 Driving performance test
5.1 Measurement of wheel rolling radius
+（27）
When measuring pneumatic tires, the tire pressure must comply with the manufacturer's regulations, with an error of no more than ±10kPa, the load is full, and the road is flat and solid.
The measurement method shall comply with the provisions of Chapter 3 of GB1334, and the measurement results shall be recorded in Table A5. For solid tires, the wheel rolling radius can be measured directly, or by measuring the circumference. 5.2 Measurement of minimum turning radius
The test method shall comply with the provisions of GB/T12540. The measurement results shall be recorded in Table A6. 5.3 Measurement of minimum stable vehicle speed
The load is full and the measurement is made at the highest speed gear. The test method shall comply with the provisions of GB/T12547, and the measurement results shall be recorded in Table A7. 5.4 Measurement of maximum vehicle speed
The load is full load, the test method is in accordance with GB/T12544 and the measurement results are recorded in Table A8. 5.5 Measurement of acceleration performance
The load is full load, measured at high speed gear, the test method is in accordance with GB/T12543 and the measurement results are recorded in Table A9. 5.6 Clearance test
JB/T 730494
The load is full load, the test method is in accordance with GB/T12536 and the measurement results are recorded in Table A10. For vehicles with a maximum speed lower than 50km/h, the test shall be conducted at 80% of the maximum speed. 5.7 Maximum traction test
The load is full and the vehicle is measured at the lowest speed gear. The test method is in accordance with the provisions of GB/T12537, and the measurement results are recorded in Table A11. 5.8 Climbing test
The maximum climbing test is carried out with full load and no load respectively. The test method is in accordance with the provisions of GB/T12539, and the measurement results are recorded in Table A12.
5.9 Braking test
It is carried out in accordance with the provisions of GB/T12676, and the measurement results are recorded in Table A13. 5.10 Driving fuel consumption measurement||tt ||Perform the test in accordance with the provisions of GB/T12545, and record the measurement results in Table A14. 6 Cleaning performance test
6.1 Cleaning width measurement
The cleaning vehicle continuously cleans 50 to 100 m in a straight line on a road or field covered with dust or sand, and then measures the maximum width that it can continuously clean. Measure three locations, take the average value, and record the result in Table A15. 6.2 Cleaning efficiency test
The cleaning vehicle cleans at its rated cleaning speed on a flat road surface with an average pollution amount of 40 g/m* (the pollutant is fine sand). The sampling distance is 5 m, and the width is the cleaning width. Measure the amount of garbage remaining on the ground before and after cleaning, and calculate the cleaning efficiency according to formula (28). Test three times, take the average value, and record the test results and calculation results in Table A16. W. -W×100
W——the amount of garbage on the ground before the first sweep·g/m;
W——the amount of garbage remaining on the ground after sweeping·g/m6.3 Measurement of sweeping speed
6.3.1 Measurement of maximum sweeping speed
（28）
A self-propelled road sweeper sweeps on a flat road with an average pollution amount of 40g/m (pollutants are fine sand particles) at its sweeping width and the maximum speed when the sweeping efficiency specified in JB/T7303 is achieved. The time required to sweep 100m is measured and the measurement results are recorded in Table A17. The sweeping efficiency should be sampled at three locations, with a sampling distance of 2m and a sampling width equal to the sweeping width. The maximum sweeping speed is calculated according to formula (29), and the calculation results are recorded in Table A17V3.6
Where: V..——maximum sweeping speed, km/h; L—sweeping distance + m;
T—sweeping time, s,
6.3.2 Measurement of minimum sweeping speed
When measuring the minimum sweeping speed, the sweeper sweeps at the minimum speed and sweeping width that can be used for sweeping work on a flat road surface with an average pollution amount of 40/m (pollutants are fine sand particles). Its cleaning efficiency should be higher than that specified in B/T7303. The sampling method for measuring the cleaning efficiency is opposite to that in Article 6.3.1. Measure the time required to sweep 100m and record the measurement results in Table A18. The minimum sweeping speed is calculated according to formula (30), and the calculation results are recorded in Table A18. Vm=3.6small
（30)
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