Some standard content:
Machinery Industry Standard of the People's Republic of China
JB/T1666-1997
Crawler Bulldozer
Test Method
Published on 1997-06-20
Ministry of Machinery Industry of the People's Republic of China
Implemented on 1998-01-01
JB/T 1666-1997
2 Reference standards·
3 General
4 Positioning test
Bulldozer performance test
6 Driving performance test
Traction performance test·
Bulldozer operation test
Oil cleanliness test
Heat balance test·
Waterproof sealing test
Visual field test
Noise test
Driver seat vibration test
Industrial test
JB/T1666—1997
This standard adopts the Japanese Industrial Standard ISD6503-1982 "Performance test method for crawler tractors" in a non-equivalent manner, and revises JB1666-84 "Type test method for crawler bulldozers". The main changes between this standard and the original standard are as follows: a) Added Chapter 1 Scope and Chapter 2 Reference Standards. b) All dimensions are changed to S international measurement units, SI auxiliary units and derived units. The test site is changed from 2 categories in the original standard to 3 categories in the current standard, which is equivalent to the relevant content in the SO international standard. d) Measurement accuracy requirements, the accuracy of each parameter is listed from a single accuracy requirement to two accuracy requirements: absolute accuracy and relative accuracy, so that at least one of the accuracy requirements can be met, making it more reasonable and feasible. e) In Chapters 4 to 15, all existing national standards and mechanical industry standards that can be cited in the test methods are used to reduce the length of this standard.
) Added Chapter 9 Oil Cleanliness Test, because cleanliness has been included in the product quality classification items and has a great impact on the performance of bulldozers, it is added to make the content more substantial. g) Added Chapter 11 Waterproof Sealing Test, because the driver's cab, oil pan and other parts have requirements for water sealing during use, so it is added for this purpose. Its test items and contents can be carried out according to contract requirements. h) The original standard stipulates that the industrial test time is 2000h. The test cycle is too long and the site is not easy to select. Considering the actual situation, the current standard is changed to at least 1000h.
i) There are two appendices in the original standard. When this standard is revised, it has been taken into account in the main text, so no appendix is set. From the date of entry into force, this standard will replace JB1666-84 at the same time. This standard is proposed and managed by the Engineering Machinery Standardization Technical Committee of the Ministry of Machinery Industry. The drafting unit of this standard: Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. The main drafter of this standard: Li Mingxiang.
1 Scope
Machinery Industry Standard of the People's Republic of China
Crawler Bulldozer
, Test Method
This standard specifies the type test method for the finalization or identification of crawler bulldozers. JB/T1666—1997
Replaces JB1666—84
This standard applies to various tests before the new products, modified products, old products that have been transferred to another factory or significantly improved, of mechanical transmission type and hydraulic mechanical transmission type crawler bulldozers (hereinafter referred to as bulldozers) are put into mass production. Regular inspections of products can also be tested according to this standard.
2 Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB6375-—86
GB 841887
GB 8419—87
GB167101—1996
GB/T16710.3—1996
GB/T 16710.4—1996
GB/T16710.5—1996
JB3690—84
JB3873—85
JB/T 6033—92
JB/T 6036—92
JB/T 7157—93
JB/T 7158—93
JB/T 7160—93
JB/T 7306—94
JB/T51007—92
3 General
Earth-moving machinery
Earth-moving machinery
Earth-moving machinery
Earth-moving machinery
Earth-moving machinery
Engineering machinery
Engineering machinery
Engineering machinery
Engineering machinery
Engineering machinery
Engineering machinery
Engineering machinery
Traction force test method
Measuring method of whole machine size
Driver seat vibration test method and limit
Driving speed determination
Noise limit
Determination of external radiated noise under stationary test conditionsDetermination of noise at the driver's position under stationary test conditionsDetermination of external radiated noise under dynamic test conditionsDetermination of noise at the driver's position under dynamic test conditionsMass measurement method for the whole machine and its working devices and componentsMethod for determination of center of gravity position
Test method for thermal balance performance of crawler bulldozerTest method for water tightness of crawler bulldozer
Construction machinery| |tt||Construction machinery
Construction machinery
Method for determining the cleanliness of fuel tanks
Method for determining the cleanliness of parts
Method for testing driver’s field of vision
Technical conditions for crawler bulldozers
Reliability test methods, fault classification and evaluation of crawler bulldozers3.1 Number of bulldozers provided for testing
Generally, two bulldozers are provided for type testing. After completing various performance tests, at least one bulldozer is put into industrial testing3.2 Preparation before testing||tt| |3.2.1 Preparation of technical data
a) There should be the instruction manual and parts catalog of the bulldozer and engine; approved by the Ministry of Machinery Industry on June 20, 1997
implemented on January 1, 1998
JB/T1666-1997
b) There should be the technical conditions for factory acceptance of the bulldozer and the acceptance certificate; there should be the bench performance test report of the engine, torque converter, transmission and hydraulic pump of the test bulldozer; the actual size measurement record of the vulnerable parts of the main parts before assembly. 3.2.2 Preparation of measuring instruments
The instruments and equipment used must be calibrated and qualified before the test. 3.2.3 Preparation of the test site
3.2.3.1 The positioning test site should be a flat concrete surface or a solid plane where the spurs will not sink. The slope of the ground in all directions within the maximum external dimensions of the bulldozer should not be greater than 0.5%, and the flatness of the ground should not be greater than 3mm per square meter. 3.2.3.2 The driving test site should use mud-bound gravel or other special material road surface runway. The road surface should be flat and clean. The shortest length of the test section is 100m. The width of the test runway should not be less than 6m. There should be enough acceleration runway and can meet the requirements of machine braking, steering and reverse test during the test. The longitudinal slope of the runway shall not be greater than 0.4%, and the transverse slope shall not be greater than 2.5%. The wind speed in each direction during the test shall not be greater than 6m/s.
3 The traction test site should be a horizontal straight road surface with sufficient adhesion and small rolling resistance. The shortest length of the runway is 100m. There should be enough space at both ends of the runway as the turning area for the machine and the load vehicle. The longitudinal slope of the runway should not be greater than 0.5%, and the transverse slope should not be greater than 3%. The soil of the runway is clay soil, and the road surface should be compacted and leveled. 3.2.4 Running-in and initial acceptance
Before the bulldozer is put into test, it should be run-in for 50 hours according to the requirements of the product manual. After running-in, it should be maintained according to regulations and records should be kept. The bulldozer should be initially accepted by the designated unit responsible for the test according to the factory acceptance technical conditions or relevant technical documents, and fill in Table 1.
3.3 Measurement accuracy requirements
The measurement accuracy shall comply with the requirements of Table 2 (the absolute error and the relative error shall be the larger of the two). For various direct measurement parameters, unless otherwise specified, the average value of three measurements shall be taken. Table 1 Main performance parameters of bulldozers
Machine model:
Travel speed
Rated engine power
Maximum traction
Gradability
Overall dimensions
Crawler center distance
Track shoe width
Spur height
Crawler ground length
Factory number:
Measurement unit
Design value
Engine
Hydraulic operating device
Working device hydraulics
Bulldozer
Average ground pressure
Ground clearance
Bulldozer working quality
Number of cylinders-cylinder diameter×stroke|| tt||Rated speed
Fuel consumption rate
Starting mode
Rated pressure
Rated pressure
Maximum lifting height
Maximum cutting depth
Maximum tilt height (left and right)
Swing angle (left and right)
Cutting angle
Lifting speed
Measured parameters
Linear dimensions
Fuel consumption
JB/T1666—1997
Table 1 (end)
Measurement unit
g(aw·h)
Table 2 Measurement accuracy requirements
Absolute error
±1℃
±20 kPa
±5r/mn
±10N·m
±5g(KW .h)
Design value
Relative error
4 Positioning test
4.1 Measurement of main geometric parameters
4.1.1 Measurement conditions
JB/T1666—1997
The bulldozer state is as shown in Figure 1, and the positioning test site is as shown in 3.2.3.1. A
Figure 1 Bulldozer positioning measurement state
4.1.2 Instruments and equipment
Steel ruler, steel tape measure, angle meter, level, plumb line, straight rod, marking pen, theodolite. 4.1.3 Measurement method
Perform according to Chapter 6 of GB8418—87.
4.1.4 Measurement results
Record the measurement results in Table 3.
4.2 Measurement of mass
4.2.1 Measurement conditions
The bulldozer should be equipped with random tools. The water tank, hydraulic oil tank and other oil chambers should be filled to the specified working level, and the fuel tank should be full. 4.2.2 Instruments and equipment
Floor scale or dynamometer (sensor), triangular support, pad, level, jack, wire rope, secondary display recorder. 4.2.3 Measurement method
Perform according to Chapter 3 of JB3690-84. Direct measurement method should be preferred to indirect measurement method. The average ground contact pressure ratio is calculated according to the following formula:
=103gnG
W—track shoe width, mm;
track ground contact length, mm;
T1666—1997
&—free fall acceleration, 9.81m/s. 3 Main geometric parameters measurement table
Machine model:
Measurement location:
Measurement items
Main engine length
Bulldozer length
Cab height
Exhaust pipe height
Shipping height
Ground clearance
Spur height
Track shoe width
Track center distance
Track ground length
Track bracket swing amount
Bulldozer blade height
Bulldozer blade maximum lifting height
Bulldozer blade maximum cutting depth
Bulldozer blade width
Bulldozer blade maximum tilt height
Drawbar height
Angle blade width
Bulldozer blade pitch angle
Bulldozer blade rotation angle||t t||Cutting angle
Factory number:
Unit of measurement
Average of 3 measurements
Measurement date:
Tester:
Without bulldozer
Without ripper
Excluding spur height
Excluding spur height
For ease of shipment, the maximum height after removing the detachable parts does not include the spur height, which refers to the average value of the left and right sides of the minimum space height in the middle of the vehicle bottom
When the cutting angle is 55°
Excluding spur height
Excluding spur height
When the bulldozer has the maximum rotation angle
The swing amount of the track bracket refers to the difference in the distance from the center of the guide wheels on both sides to the ground when the guide wheel of the track on one side is lifted
and the track under the guide wheel on the other side is about to leave the ground.
4.2.4 Measurement results
Record the measurement results in Table 4.
3 Determination of the center of gravity
4.3.1 Determination conditions
a) The bulldozer should be equipped with random tools and placed in the specified position. b) The water tank, hydraulic oil tank and other oil chambers should be filled to the specified level, and the fuel tank should be filled. c) The bulldozer should be lowered as far as possible to a position slightly away from the horizontal reference plane. 5
JB/T1666—1997
① In the absence of a floor scale and a pressure dynamometer, a tension dynamometer is allowed. Table 4 Mass measurement data table
Machine model:
Measurement location:
Measurement items
Working mass
Track contact area
Average contact pressure
4.3.2 Instruments and equipment
Measurement unit
Factory number:
Ambient temperature:
Average measurement value
Measurement date:
Test personnel:
Design value
Mass center of gravity test equipment or dynamometer, lifting equipment, platform, triangular support, level, plumb line, square, marking plate, steel tape measure.
Measurement method
The measurement method of the horizontal ordinate X, horizontal abscissa Y and vertical coordinate h of the center of gravity shall be carried out in accordance with B3873. 4.3.4 Measurement results
Record the measurement results in Table 5.
5 Gravity center measurement data table
Machine model:
Measurement location:
Working mass
Left side mass
Right side mass
Total mass
Gravity center coordinates
Measurement items
Factory number:
Ambient temperature:
G=G+GR
Measurement of operating force and stroke of operating device
4.4.1 Measurement conditions
Measurement date:
Test personnel:
Measurement value
The engine is in the idle speed and rated speed operation state respectively, and the site is in accordance with 3.23.1.
2 Instruments and equipment
Dynamometer, steel tape measure, steel ruler.
4.4.3 Measurement method
Measure the items listed in Table 6 and measure the engine speed at the same time. The brake operating force is the minimum operating force measured when the bulldozer is driving in the I gear and making the minimum turn. Measure the operating force at the center of the handle at a normal operating speed; the stroke refers to the displacement of the upper end of the handle. 4.4.4 Measurement results
Record the measurement results in Table 6.h)
Design value
Relative error
4 Positioning test
4.1 Measurement of main geometric parameters
4.1.1 Measurement conditions
JB/T1666—1997
The bulldozer state is as shown in Figure 1, and the positioning test site is as shown in 3.2.3.1. A
Figure 1 Bulldozer positioning measurement state
4.1.2 Instruments and equipment
Steel ruler, steel tape measure, angle meter, level, plumb bob, straight rod, stylus, theodolite. 4.1.3 Measurement method
Perform according to Chapter 6 of GB8418—87.
4.1.4 Measurement results
Record the measurement results in Table 3.
4.2 Measurement of mass
4.2.1 Measurement conditions
The bulldozer should be equipped with random tools, the water tank, hydraulic oil tank and other oil chambers should be filled to the specified working level, and the fuel tank should be full. 4.2.2 Instruments and equipmentbZxz.net
Floor scale or dynamometer (sensor), triangular support, pad, level, jack, wire rope, secondary display recorder. 4.2.3 Measurement method
Perform according to Chapter 3 of JB3690-84. Direct measurement method should be preferred to indirect measurement method. The average ground contact pressure ratio is calculated according to the following formula:
=103gnG
W—track shoe width, mm;
track ground contact length, mm;
T1666—1997
&—free fall acceleration, 9.81m/s. 3 Main geometric parameters measurement table
Machine model:
Measurement location:
Measurement items
Main engine length
Bulldozer length
Cab height
Exhaust pipe height
Shipping height
Ground clearance
Spur height
Track shoe width
Track center distance
Track ground length
Track bracket swing amount
Bulldozer blade height
Bulldozer blade maximum lifting height
Bulldozer blade maximum cutting depth
Bulldozer blade width
Bulldozer blade maximum tilt height
Drawbar height
Angle blade width
Bulldozer blade pitch angle
Bulldozer blade rotation angle||t t||Cutting angle
Factory number:
Unit of measurement
Average of 3 measurements
Measurement date:
Tester:
Without bulldozer
Without ripper
Excluding spur height
Excluding spur height
For ease of shipment, the maximum height after removing the detachable parts does not include the spur height, which refers to the average value of the left and right sides of the minimum space height in the middle of the vehicle bottom
When the cutting angle is 55°
Excluding spur height
Excluding spur height
When the bulldozer has the maximum rotation angle
The swing amount of the track bracket refers to the difference in the distance from the center of the guide wheels on both sides to the ground when the guide wheel of the track on one side is lifted
and the track under the guide wheel on the other side is about to leave the ground.
4.2.4 Measurement results
Record the measurement results in Table 4.
3 Determination of center of gravity
4.3.1 Determination conditions
a) The bulldozer should be equipped with random tools and placed in the specified position. b) The water tank, hydraulic oil tank and other oil chambers should be filled to the specified level, and the fuel tank should be filled. c) The bulldozer should be lowered as far as possible to a position slightly away from the horizontal reference plane. 5
JB/T1666—1997
① In the absence of a floor scale and a pressure dynamometer, a tension dynamometer is allowed. Table 4 Mass measurement data table
Machine model:
Measurement location:
Measurement items
Working mass
Track contact area
Average contact pressure
4.3.2 Instruments and equipment
Measurement unit
Factory number:
Ambient temperature:
Average measurement value
Measurement date:
Test personnel:
Design value
Mass center of gravity test equipment or dynamometer, lifting equipment, platform, triangular support, level, plumb line, square, marking plate, steel tape measure.
Measurement method
The measurement method of the horizontal ordinate X, horizontal abscissa Y and vertical coordinate h of the center of gravity shall be carried out in accordance with B3873. 4.3.4 Measurement results
Record the measurement results in Table 5.
5 Gravity center measurement data table
Machine model:
Measurement location:
Working mass
Left side mass
Right side mass
Total mass
Gravity center coordinates
Measurement items
Factory number:
Ambient temperature:
G=G+GR
Operating force and stroke measurement of operating device
4.4.1 Measurement conditions
Measurement date:
Test personnel:
Measurement value
The engine is in the idle speed and rated speed operation state respectively, and the site is in accordance with 3.23.1.
2 Instruments and equipment
Dynamometer, steel tape measure, steel ruler.
4.4.3 Measurement method
Measure the items listed in Table 6 and measure the engine speed at the same time. The brake operating force is the minimum operating force measured when the bulldozer is driving in the I gear and making the minimum turn. Measure the operating force at the center of the handle at a normal operating speed; the stroke refers to the displacement of the upper end of the handle. 4.4.4 Measurement results
Record the measurement results in Table 6.h)
Design value
Relative error
4 Positioning test
4.1 Measurement of main geometric parameters
4.1.1 Measurement conditions
JB/T1666—1997
The bulldozer state is as shown in Figure 1, and the positioning test site is as shown in 3.2.3.1. A
Figure 1 Bulldozer positioning measurement state
4.1.2 Instruments and equipment
Steel ruler, steel tape measure, angle meter, level, plumb bob, straight rod, stylus, theodolite. 4.1.3 Measurement method
Perform according to Chapter 6 of GB8418—87.
4.1.4 Measurement results
Record the measurement results in Table 3.
4.2 Measurement of mass
4.2.1 Measurement conditions
The bulldozer should be equipped with random tools, the water tank, hydraulic oil tank and other oil chambers should be filled to the specified working level, and the fuel tank should be full. 4.2.2 Instruments and equipment
Floor scale or dynamometer (sensor), triangular support, pad, level, jack, wire rope, secondary display recorder. 4.2.3 Measurement method
Perform according to Chapter 3 of JB3690-84. Direct measurement method should be preferred to indirect measurement method. The average ground contact pressure ratio is calculated according to the following formula:
=103gnG
W—track shoe width, mm;
track ground contact length, mm;
T1666—1997
&—free fall acceleration, 9.81m/s. 3 Main geometric parameters measurement table
Machine model:
Measurement location:
Measurement items
Main engine length
Bulldozer length
Cab height
Exhaust pipe height
Shipping height
Ground clearance
Spur height
Track shoe width
Track center distance
Track ground length
Track bracket swing amount
Bulldozer blade height
Bulldozer blade maximum lifting height
Bulldozer blade maximum cutting depth
Bulldozer blade width
Bulldozer blade maximum tilt height
Drawbar height
Angle blade width
Bulldozer blade pitch angle
Bulldozer blade swing angle||t t||Cutting angle
Factory number:
Unit of measurement
Average value of 3 times
Measurement date:
Tester:
Without bulldozer
Without ripper
Excluding spur height
Excluding spur height
For ease of shipment, the maximum height after removing the detachable parts does not include the spur height, which refers to the average value of the left and right sides of the minimum space height in the middle of the vehicle bottom
When the cutting angle is 55°
Excluding spur height
Excluding spur height
When the bulldozer has the maximum rotation angle
The swing amount of the track bracket refers to the difference in the distance from the center of the guide wheels on both sides to the ground when the guide wheel of the track on one side is lifted
and the track under the guide wheel on the other side is about to leave the ground.
4.2.4 Measurement results
Record the measurement results in Table 4.
3 Determination of the center of gravity
4.3.1 Determination conditions
a) The bulldozer should be equipped with random tools and placed in the specified position. b) The water tank, hydraulic oil tank and other oil chambers should be filled to the specified level, and the fuel tank should be filled. c) The bulldozer should be lowered as far as possible to a position slightly away from the horizontal reference plane. 5
JB/T1666—1997
① In the absence of a floor scale and a pressure dynamometer, a tension dynamometer is allowed. Table 4 Mass measurement data table
Machine model:
Measurement location:
Measurement items
Working mass
Track contact area
Average contact pressure
4.3.2 Instruments and equipment
Measurement unit
Factory number:
Ambient temperature:
Average measurement value
Measurement date:
Test personnel:
Design value
Mass center of gravity test equipment or dynamometer, lifting equipment, platform, triangular support, level, plumb line, square, marking plate, steel tape measure.
Measurement method
The measurement method of the horizontal ordinate X, horizontal abscissa Y and vertical coordinate h of the center of gravity shall be carried out in accordance with B3873. 4.3.4 Measurement results
Record the measurement results in Table 5.
5 Gravity center measurement data table
Machine model:
Measurement location:
Working mass
Left side mass
Right side mass
Total mass
Gravity center coordinates
Measurement items
Factory number:
Ambient temperature:
G=G+GR
Measurement of operating force and stroke of operating device
4.4.1 Measurement conditions
Measurement date:
Test personnel:
Measurement value
The engine is in the idle speed and rated speed operation state respectively, and the site is in accordance with 3.23.1.
2 Instruments and equipment
Dynamometer, steel tape measure, steel ruler.
4.4.3 Measurement method
Measure the items listed in Table 6 and measure the engine speed at the same time. The brake operating force is the minimum operating force measured when the bulldozer is driving in the I gear and making the minimum turn. Measure the operating force at the center of the handle at a normal operating speed; the stroke refers to the displacement of the upper end of the handle. 4.4.4 Measurement results
Record the measurement results in Table 6.81m/s. 3 Main geometric parameters measurement table
Machine model:
Measurement location:
Measurement items
Main engine length
Bulldozer length
Cab height
Exhaust pipe height
Shipping height
Ground clearance
Spur height
Track shoe width
Track center distance
Track ground length
Track bracket swing amount
Bulldozer blade height
Bulldozer blade maximum lifting height
Bulldozer blade maximum cutting depth
Bulldozer blade width
Bulldozer blade maximum tilt height
Drawbar height
Angle blade width
Bulldozer blade pitch angle
Bulldozer blade rotation angle||t t||Cutting angle
Factory number:
Unit of measurement
Average of 3 measurements
Measurement date:
Tester:
Without bulldozer
Without ripper
Excluding spur height
Excluding spur height
For ease of shipment, the maximum height after removing the detachable parts does not include the spur height, which refers to the average value of the left and right sides of the minimum space height in the middle of the vehicle bottom
When the cutting angle is 55°
Excluding spur height
Excluding spur height
When the bulldozer has the maximum rotation angle
The swing amount of the track bracket refers to the difference in the distance from the center of the guide wheels on both sides to the ground when the guide wheel of the track on one side is lifted
and the track under the guide wheel on the other side is about to leave the ground.
4.2.4 Measurement results
Record the measurement results in Table 4.
3 Determination of center of gravity
4.3.1 Determination conditions
a) The bulldozer should be equipped with random tools and placed in the specified position. b) The water tank, hydraulic oil tank and other oil chambers should be filled to the specified level, and the fuel tank should be filled. c) The bulldozer should be lowered as far as possible to a position slightly away from the horizontal reference plane. 5
JB/T1666—1997
① In the absence of a floor scale and a pressure dynamometer, a tension dynamometer is allowed. Table 4 Mass measurement data table
Machine model:
Measurement location:
Measurement items
Working mass
Track contact area
Average contact pressure
4.3.2 Instruments and equipment
Measurement unit
Factory number:
Ambient temperature:
Average measurement value
Measurement date:
Test personnel:
Design value
Mass center of gravity test equipment or dynamometer, lifting equipment, platform, triangular support, level, plumb line, square, marking plate, steel tape measure.
Measurement method
The measurement method of the horizontal ordinate X, horizontal abscissa Y and vertical coordinate h of the center of gravity shall be carried out in accordance with B3873. 4.3.4 Measurement results
Record the measurement results in Table 5.
5 Gravity center measurement data table
Machine model:
Measurement location:
Working mass
Left side mass
Right side mass
Total mass
Gravity center coordinates
Measurement items
Factory number:
Ambient temperature:
G=G+GR
Operating force and stroke measurement of operating device
4.4.1 Measurement conditions
Measurement date:
Test personnel:
Measurement value
The engine is in the idle speed and rated speed operation state respectively, and the site is in accordance with 3.23.1.
2 Instruments and equipment
Dynamometer, steel tape measure, steel ruler.
4.4.3 Measurement method
Measure the items listed in Table 6 and measure the engine speed at the same time. The brake operating force is the minimum operating force measured when the bulldozer is driving in the I gear and making the minimum turn. Measure the operating force at the center of the handle at a normal operating speed; the stroke refers to the displacement of the upper end of the handle. 4.4.4 Measurement results
Record the measurement results in Table 6.81m/s. 3 Main geometric parameters measurement table
Machine model:
Measurement location:
Measurement items
Main engine length
Bulldozer length
Cab height
Exhaust pipe height
Shipping height
Ground clearance
Spur height
Track shoe width
Track center distance
Track ground contact length
Track bracket swing amount
Bulldozer blade height
Bulldozer blade maximum lifting height
Bulldozer blade maximum cutting depth
Bulldozer blade width
Bulldozer blade maximum tilt height
Drawbar height
Angle blade blade width
Bulldozer blade pitch angle
Bulldozer blade rotation angle||t t||Cutting angle
Factory number:
Unit of measurement
Average value of 3 times
Measurement date:
Tester:
Without bulldozer
Without ripper
Excluding spur height
Excluding spur height
For ease of shipment, the maximum height after removing the detachable parts does not include the spur height, which refers to the average value of the left and right sides of the minimum space height in the middle of the vehicle bottom
When the cutting angle is 55°
Excluding spur height
Excluding spur height
When the bulldozer has the maximum rotation angle
The swing amount of the track bracket refers to the difference in the distance from the center of the guide wheels on both sides to the ground when the guide wheel of the track on one side is lifted
and the track under the guide wheel on the other side is about to leave the ground.
4.2.4 Measurement results
Record the measurement results in Table 4.
3 Determination of the center of gravity
4.3.1 Determination conditions
a) The bulldozer should be equipped with random tools and placed in the specified position. b) The water tank, hydraulic oil tank and other oil chambers should be filled to the specified level, and the fuel tank should be filled. c) The bulldozer should be lowered as far as possible to a position slightly away from the horizontal reference plane. 5
JB/T1666—1997
① In the absence of a floor scale and a pressure dynamometer, a tension dynamometer is allowed. Table 4 Mass measurement data table
Machine model:
Measurement location:
Measurement items
Working mass
Track contact area
Average contact pressure
4.3.2 Instruments and equipment
Measurement unit
Factory number:
Ambient temperature:
Average measurement value
Measurement date:
Test personnel:
Design value
Mass center of gravity test equipment or dynamometer, lifting equipment, platform, triangular support, level, plumb line, square, marking plate, steel tape measure.
Measurement method
The measurement method of the horizontal ordinate X, horizontal abscissa Y and vertical coordinate h of the center of gravity shall be carried out in accordance with B3873. 4.3.4 Measurement results
Record the measurement results in Table 5.
5 Gravity center measurement data table
Machine model:
Measurement location:
Working mass
Left side mass
Right side mass
Total mass
Gravity center coordinates
Measurement items
Factory number:
Ambient temperature:
G=G+GR
Measurement of operating force and stroke of operating device
4.4.1 Measurement conditions
Measurement date:
Test personnel:
Measurement value
The engine is in the idle speed and rated speed operation state respectively, and the site is in accordance with 3.23.1.
2 Instruments and equipment
Dynamometer, steel tape measure, steel ruler.
4.4.3 Measurement method
Measure the items listed in Table 6 and measure the engine speed at the same time. The brake operating force is the minimum operating force measured when the bulldozer is driving in the I gear and making the minimum turn. Measure the operating force at the center of the handle at a normal operating speed; the stroke refers to the displacement of the upper end of the handle. 4.4.4 Measurement results
Record the measurement results in Table 6.
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