Some standard content:
TCS65.160.20
Machinery Industry Standard of the People's Republic of China
JB/T 10266.2—2001
Mini tillers
Testing method
Testing method for handheld tillers2001-06-04 Issued
China Machinery Industry Federation
2001-10-01 Implementation
JB/10266.2—2001
This standard is proposed and approved by the National Machinery Industry Standardization Technical Committee. The main drafting unit of this standard is China Agricultural Mechanization Research Institute. The participating drafting units of this standard are Chongqing Hesheng Machinery Co., Ltd., Donghuaxing Group Agricultural Machinery Co., Ltd., and Shandong Zhucheng High Strength Fastener Co., Ltd. Agricultural Machinery Factory. The main drafters of this standard are Zheng Qingshan, Liu Na, Han Zhu, and Shanxiu. This standard was first issued in June 2001.
Machinery Industry Standard of the People's Republic of China
Mini tillers: Test Methods
Telmg method faz bapdbek tillers This standard specifies the test method for mini tillers JB/T10266.1-2001
This standard is applicable to motorized mini tillers (or micro tillers, ... GB/T11052--1987
GB/T 5667-1985
GB/T5668.3—1995
GB/T14365—1993
3 General Principles
3.1 General Requirements
Internal Combustion Engine Performance Test Method
Agricultural Machinery Production Test Method
Tillage Machinery Test Method
Acoustics, Motor Vehicle Stationary Noise Measurement Method 3.1. Before the test, the manufacturer shall provide the necessary technical documentation. 3.1.2 Each assembly or component, accessory and auxiliary device of the tiller shall be in accordance with the specifications of the instruction manual and adjusted to the specified conditions of the technical documents of the machine. 3.1.3 The fuel and lubricating oil used during the test shall be selected according to the instruction manual and the quality shall meet the requirements of the relevant petroleum product standards. 3.1.4 During the entire test period, except for use and technical maintenance in accordance with the instructions, it shall not be adjusted or replaced at will. If necessary, it shall be approved by the test organization and carried out under its supervision, and then the relevant items shall be retested. All abnormal phenomena during the test shall be recorded in detail.
3.2 Test measurement accuracy
Except for special provisions, the measurement accuracy of various parameters shall meet the requirements of Table 1 (the larger value of the absolute set error and the relative error shall be taken
Approved by China Machinery Industry Federation on June 4, 2001 and implemented on October 1, 2001
Name of the number
Spider size
4 Acceptance and running-in
4.1 Acceptance
3B10266.2—2001
Table 1 Measurement plate accuracy requirements
Circumference measurement accuracy requirements| |tt||Error
.*2.0mm
±1.tht/mins
Error
4.1.1 The microcomputer to be tested shall be inspected and modified by the test responsible unit according to the technical regulations of the micro-tillage machine and the requirements of relevant documents. 4.1.2 Register the manufacturer's name, product model, product number and factory date of the product certificate. 4.1.3 Check the integrity of each assembly, component, accessory, auxiliary tray and random tools of the micro-tillage machine, the tightness of the fasteners in key parts, and the leakage and tightness of each assembly lubricating oil and lubrication point. 4.2 Before the running-in test, the engine and transmission box should be connected and disassembled according to the running-in specifications specified in the random technical documents or instruction manual, and attention should be paid to checking the tightness of the parts and the working state. Detailed records should be made for the problems found and the solutions. After the test, technical maintenance should be carried out according to the regulations. 5
Determination of machine parameters
5.1 Purpose
Check whether the machine parameters of the tested micro-tillage machine meet the requirements of the random technical documents, and provide the necessary data for analyzing the relevant test results.
5.1 Determination conditions and requirements
5.1.1 The measurement site should be a flat ground with good light and hard texture, 3m below the ground. The slope of the ground within the measurement area should not exceed 1%. 5.2.2 The tiller is measured in the factory stand-alone state (with engine). 5.2.3 The tiller is parked on the measurement site 1., in a straight-line driving state, and the engine is ignited. The whole machine is in rotary tillage working state, and the grounding point of the rotary tiller and the grounding point of the power device (or equivalent) are in the same plane. 5.3 Measurement method
5.3.1 Geometric figures
Main external dimensions and measurement parameters of the tiller.
The longitudinal dimension and transverse dimension are measured in the direction parallel to the longitudinal center of the lower tiller and the axial load direction of the drive shaft respectively. The height scale 2
is the height of the vertical tillage mantle,
JB/T 10266.2--2001
In addition to direct measurement of the horizontal and height dimensions, the weight chain, height gauge, level ruler, right-angle ruler and auxiliary measuring frame can be used for direct measurement:
In addition to direct measurement of angle parameters, the positions of each characteristic point can be determined by graphical or calculation methods. 5.3.2 Volumetric parameters
The maximum amount of liquid that must be added to each part of the tiller when the tiller is working. When measuring, the ambient temperature should be 20±15, and the container should receive the liquid in each measuring part and its pipeline. 5.3.3 The measured parameters
The quality parameters are all directly measured by the wall weighing device. 5.3.4 Center of mass
The center of mass of the rotary tiller is expressed by α, e, and when measuring, the symmetrical ends of the drive shaft should be supported by a center (or equivalent) device. The grounding point of the toe device (or equivalent) should be close to the center and made to be at the same level as the grounding point of the rotary tiller. 5.3.4.1 The axial coordinates of the center of mass
are the approximate distance between the center of mass and the drive axis, and the center is behind the limit axis. The horizontal coordinate of the center of mass is positive, otherwise it is negative: calculate according to formula [1]:
In the formula:
The horizontal coordinate of the center of mass of the micro-tiller, mm:
The mass of the micro-tiller in use, kg:
Gravity, m/s:
I—— The ground support reaction force of the resistance device when the micro-tiller is in rotary tillage state, N: The longitudinal distance between the ground support point of the resistance device of the micro-tiller and the axis of the drive shaft, mm5.3.4.2 The horizontal abscissa of the center of mass e
The horizontal horizontal coordinate of the center of mass is the distance from the center to the longitudinal center plane of the drive wheel. When looking forward to the micro-tiller, when the center is on the left side of the design plane, it is set to be positive, otherwise it is negative. Calculate by formula (2): e (rr,)
Where: e—horizontal coordinate of the center of mass of the micro-tillage machine, mm; L—the half-distance between the two symmetrical support points of the drive shaft, m; 1—the support reaction force of the left support point of the drive shaft, N; 2—the support reaction force of the right support point of the drive shaft, N. 5.3.4.3 Center of mass height coordinate sheet
Center of mass height coordinate is the distance from the center of mass to the rigid support plane. The value is specified. The center of mass height coordinate is determined by mechanical methods. 6 Performance test
6.1 The test is to assess whether the performance and relevant technical and economic indicators of the micro-tillage machine meet the relevant requirements. 2
6.2 Test conditions and requirements
JB/T10266.1—2001
2.1 The test area should be selected according to the adaptability of the test sample and a field with a certain degree of decay. The test strips at each location of the field should be small and their area should meet the requirements of the test items. 6.2.2 The test unit should be kept in good technical condition. The prototype should not be replaced during the test. 6.3 Operation test
The operating force of the operating mechanism is directly measured by a dynamometer or force measuring element. When the micro-tiller is in a static state, measure the maximum operating force when each operating mechanism is moved to the upper working position. The force point is the midpoint of the driver's regular operating position. 6.4 Green market measurement
6.4. Static environment operation sound measurement
6.4.1.Test conditions
Within the radius of 25m around the center of the measuring station, there shall be no noise reflectors such as buildings, calendars, rocks and machinery and equipment.
The measurement shall be carried out in good air, 1.2m above the ground, with a wind speed of no more than 3m/s. To avoid the influence of wind noise, a wind shield may be used, but it shall not affect the measurement height. The difference between the actual noise value and the noise level value should be no less than 10B (A. There should be no people or other obstacles between the output group of the sound level meter and the micro-tiller under test, and there should be no obstacles affecting the sound field near the microphone. People should be in a place that does not affect the measurement of the sound level meter. The micro-tiller is preheated to make all parts reach the normal working temperature before the test begins. 6.4.1.2 Test method
The micro-tiller under test is parked in the center of the test site. The sound level meter is placed on the driving extension line of the micro-tiller under test, 7.5m away from the vertical plane of the longitudinal center of the micro-tiller under test and 1.2m above the ground. The "A" meter is used for measurement in the "fast" gear. The micro-tiller under test is in neutral gear. After the engine is preheated to the normal operating temperature, it runs at the maximum speed specified by the speedometer. The maximum value of the sound level meter at this time is recorded: the left and right sides are measured three times respectively. The difference between the two measured values on the same side should not be greater than 2 days (A). Take the half mean of the measured value at one time, and take the larger of the average values on the left and right sides as the static environmental noise of the micro-tiller under test. 6.4.2 Noise measurement at the driver's operating position 6.4.2.1 Test conditions
Within a radius of 25m around the center of the test site, there shall be no large sound reflectors, such as buildings, enclosures, rocks, machinery and equipment. Www.bzxZ.net
The measurement shall be carried out when the weather is good and the wind speed is not higher than 3m/s. In order to avoid the influence of wind noise, the wind speed may be used, but it shall not affect the measurement.
The difference between the measured noise value and the background noise value shall not be less than 108 (A) 6.4.2.2 Test method
Use the "A" weighting network and "slow" gear of the sound level meter for measurement. Install the microphone of the sound level meter on the side with larger noise on the helmet frame of the driver, and make the microphone forward, at the same height as the eyebrows, and 250 degrees from the center plane of the helmet frame. nm±20rmm, in the reverse test, the tiller is in the maximum designed tillage depth and in the first gear, the engine throttle is fully opened, and after it stabilizes, the maximum noise value is sent and the forward speed is measured. Finally, the micro-tillage machine engine throttle is fully opened, and the idle speed is 4-6km/h.
JB/T10266.2—10Q1
6.5 Traction test (this test is carried out on a tiller with traction function) 6.5.1 Test conditions and requirements
6.5.1.1 The test should be carried out on flat, dry and hard ground. The length of the measurement area should be not less than 20m. The unit should have at least 10 minutes of stability before entering the test area. 6.5.1.2 The test corresponds to the configuration and overall mass of the micro-tiller being the same as those of the typical micro-tiller in the operating state. In order to ensure the overall stability of the micro-tiller, the test machine should be connected to a special traction device, which consists of a traction frame, a tail wheel and a counterweight. The traction device is directly connected to the traction point of the micro-tiller, and the tail wheel is fixed to the rear of the traction frame, and the tail wheel shaft is located completely below the micro-tiller's hand end. The center plane of the traction frame and the tail wheel is located in the radial plane of the micro-tiller. A counterweight is placed on the traction frame, and the counterweight is moved forward and backward to make the static weight of the tail wheel 2%-3% of the total mass of the micro-tiller. 6.5.2 Test method
6.5.2.1 Install a dynamometer (pulling sensor) between the micro-tiller and the load. The traction point position shall remain unchanged during the test. A line shall be applied in the longitudinal center plane of the micro-tiller, parallel to the ground with an invisible slope. During the test, the microcomputer is in the test working gear, the engine throttle reaches full throttle and remains stable, and the microcomputer load is realized by utilizing the speed difference between the dynamometer of the tiller and the load vehicle. During the full test, the load is gradually increased from small to large. Each time the dynamometer reaches a stable working condition, the machine passes through the test area. The measuring well records the traction, oil consumption, driving wheel rotation number and time passing through the test area. The test is carried out until the maximum traction rate or the driving wheel slip rate reaches 15% (whichever is reached first). The number of loading levels is generally not less than eight. 6.5.2.2 Determine the ultimate traction before the driving wheel slips seriously. 6.5.21.3 Determine the air flow when the micro-feeder is towed The traction force meter pulls the test micro-tillage machine in the neutral position through the test area at a minimum speed of 4 km/h, and records the traction force and time of passing through the test area. 6.5.3 Test results
6.5.3.1 The test results are calculated using the following formula: a) Line speed
Tillage machine speed, knh:
Where: K
S Test vehicle section length: m:
Time for micro-tillage machine to pass through the test area, 5.
b) Traction power
Where: N—micro-tillage traction power, kw:
P. Micro-tillage machine traction force, N,
Core fuel consumption plate
Where: G—micro-tillage machine fuel consumption, kerhAG micro-tillage machine fuel consumption plate through the test area, B traction specific fuel consumption
Where: Shu
FB/T0266.2—2001
1000Gt
Micro-tillage machine traction specific fuel consumption, expressed as [k·h
d) Arc wheel slip rate
Formula In: ... limited wheel rotation rate
n·The number of driving wheel revolutions of the micro-tillage machine through the measuring area during the idle stroke; n,
The number of driving wheel revolutions of the micro-tillage machine through the measuring area during the working trip, 1x100%
Traction force PT, traction assistance rate, speed V, fuel consumption G: specific fuel consumption & 6.5.3.2 The following measured data and their results and rotation rate are made into a micro-tillage machine traction characteristic oil curve including five groups of curves including V-PT, NMF-PT, G-PT, gT-P, and SP, and the maximum traction power point and maximum traction force point of each gear are obtained according to the curve. 6.6 Rotary tillage performance test
6.6. [Test field coordination measurement Measure five points as shown in Figure 1. The investigation and measurement content is: Figure 1
Soil roller type.
b) Vegetation before tillage: Use a 1m×1m frame to cut the stubble in the frame flush with the ground and weigh it immediately. The process can be obtained by weighing or counting the rice stubble in the data. At this time, the diagonal of the frame should be consistent with the direction of the row of stubbles and calculate the average value. e) Determination of ten-fill moisture content shall be carried out in accordance with GB5668.3. 6.5.2 Determination items:
a) Determination of the depth of cultivation and its stability: carried out in accordance with GB/T5668.3, b) Determination of tillage width: carried out in accordance with GB/T5668.3. c) Determination of soil coverage: take all samples within B××50cm, and measure the mass of ten pieces not exceeding 5cm and the total (where B is the width, is the tillage depth, unit; mJ.
d) Determination of the coverage rate after tillage: carried out in accordance with GB/T5668.3. e) Determination of surface flatness after rotary tillage: Conducted in accordance with GB/T5668.3. 7.1 The purpose of the production test is to assess the economical use, reliability, performance stability, adaptability to environmental requirements and natural conditions, convenience of maintenance, usability of main parts and easy-to-lock parts, and labor safety of the micro-tillage machine under normal cropping conditions. 7.2 Test conditions and requirements B/102662—2001 7.2.1 The test case should be representative and suitable for the applicable range of the machine. 7.2.2 The agricultural implements used with the micro-tillage machine are the matching implements specified in the manual of the machine model, and their technical status is good. 2.3 Full-time test personnel shall be equipped, and operators shall be equipped in accordance with the provisions of the machine manual. The cumulative operation time under load in the production test shall be no less than 300 hours, of which the rotary tillage operation time shall be no less than 200 hours. 7.2.4
Operation time under load includes load performance test time and tillage, field turning, and vehicle arrival time, but does not include engine idling and block transfer time.
7.2.5 The operation quality of the micro-machine must gradually meet local agronomic requirements and be calculated according to the total average hourly fuel consumption during the test period. 7.3 Test period
7.3.1 Production assessment
3.1.1 Realistic records should be kept throughout the production assessment process. Each shift must frequently record the workload, fuel and lubricant consumption, and various time consumptions, with the time accurate to the minute, and then summarize and calculate its operating hour productivity and shift productivity. 3.12 Record the deformation and damage of the prototype parts in detail. 7.1.1.3 Observe or measure the convenience of the maintenance, disassembly and assembly of each part of the prototype. 7.3.1.4 Observe or measure the convenience of operation of the prototype, as well as the operating conditions and safety, such as the operating noise, lifting, and the impact on the personal safety of the operator.
7.3.2 Dust inspection
7.3.2.1. The production test should be no less than three consecutive shifts. The working time of each tested shift shall not be less than 6 hours, and the time shall be accurate to seconds. 7.3.2.2 The time consumption, workload, fuel and lubricant consumption of each tested shift shall be summarized and sorted out, and the pure working hourly productivity and fuel and lubricant mixed oil consumption rate shall be calculated. 4. Classification of production test time
The production test time shall be classified according to Table 2.
Table 2 Classification of production test time
Working time
Working time
Shift time
Non-working time
Non-shift time
7.5 Calculation of technical and economic indicators
7.5. Pure working hourly productivity:
Single-head turning idle time
Technical service time
Maintenance time
Warning and maintenance time
Main 1km idle travel or transfer time
Change of travel or transfer time greater than 1km
Stop due to self-conditions Machine time
Organizational operation time
Other reasons lead to final machine time
Where: F-pure working hour productivity, hm\h: JB/T10266.2-2001
Q-shift operation volume during production inspection, hm
T: pure working time during production inspection, h7.5.2 Operation hour productivity
Where: F-operation hour productivity, hmh; E
2-shift operation volume during production inspection, hm; T-
-shift operation time during production inspection, h. 7.5.3 Progress hour productivity!
Where: E-shift hourly productivity, hm/h-"shift time during production number, h, 7.5.4 Unit fuel consumption type
Where:. Unit operation fuel consumption, g, unG
Production of a certain number of main oil consumption, k. 7.5.5 Unit lubricating oil detackification:
Where: G-unit operation lubricating oil consumption, kg/hmMo
G.-Each replacement and replacement in the specified cycle The amount of lubricating oil, kg! The shift operation record during the standard cycle, hm
7.5.6 Usability
Where: K—Usability:
-Fault elimination time per shift during the production test, h. F
7.5.7 Mean time between failures:
Where: MTRF--Failure interval time, hT--Accumulated working time, h;
F--Total number of failures during the test period. 7. 5. Daily adjustment and maintenance convenience;
ET,+ETh
（14）
/10266.2-1001
Wherein: - Adjustment and maintenance convenience during production assessment period; - Each adjustment and maintenance time during production assessment period, h. Test report
After the test, the determination, calculation and observation results shall be summarized, analyzed and written into a test report. The contents of the test report are as follows:
a) Test date;
b) Introduction to the structure and technical characteristics of the test prototype: Agronomic requirements and test conditions of the test area: d) Test results and analysis:
e Existing problems and improvement suggestions:
Conclusion.
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