JB/T 9014.9-1999 Determination of external friction coefficient of bulk materials in continuous conveying equipment

JB/T 9014.9-1999 JB/T 9014.9-1999 Determination of external friction coefficient of bulk materials in continuous conveying equipment JB/T9014.9-1999 Standard download decompression password: www.bzxz.net

JCS53.040.01
Machinery Industry Standard of the People's Republic of China
JR/T9014.1~9014.9-1999
Continuous bandling equipment
Loose bulk material-Perfortmianceand determination
Continuous bandling equipmentLoose bulk material-Perfortmianceand determination1999-06-28 Issued
State Machinery Industry Bureau
Implementation on January 1, 2000
JB/T9014.9--1999
Revision of determination of external friction coefficient of bulk materials. This standard is revised to 2BJ81006.9-88 (Continuous Conveying Equipment). The original standard has been edited and revised. The main technical contents have been changed. This standard is revised from July 18, 2006.9-88. This standard is proposed by Beijing Hoisting and Conveying Machinery Research Institute. The drafting unit of this standard is Beijing Hoisting and Conveying Machinery Research Institute Ningdu Freight Machinery Factory. 40
Machinery Industry Standard of the People's Republic of ChinaWww.bzxZ.net
Continuous Conveying Equipment
Determination of Friction Coefficient of Bulk Material
Cowtinuonshandigequipueut-LoosebulkmaterialDetermination of frletian coefficientof material sildmg "ontrough" scope
The new standard specifies the method for determining the external friction angle of granular materials. JBT9014.9—1999
Generation 228100.9--88
4 The standard is applicable to the determination of the external friction coefficient of bulk materials with a particle size of less than 251mm1 transported by reverse continuous conveying equipment: 2 Referenced standards
The clauses contained in the following standards are reduced to the clauses of this standard through reference in this standard: When this standard is published, the versions shown are valid. All standards will be revised. The possibility of using the new versions of the following standards should be explored. IRT9014.1—1999 Performance spectrum and classification of bulk materials in reverse continuous conveying equipment JR.D. 9014.2—1999 General specifications for test methods for physical properties of granular materials in reverse continuous conveying equipment 3 Determination of external friction 3.1 Key points of the method Reverse test, determination of the increase in the flat surface of the material under different solid fasteners, used to determine the external wear resistance of the material 3.2 External friction measurement (limited to 1) Supporting rotating frame Approved by Jiangsu Machinery Industry Corporation on June 2, 1999 000-01-1 Implementation
h Aggregate cabinet: lead products;
) Ruler;
JB9014.9-1 9
d) Test plate: specification 300mm×600mm×6mm, material is determined according to the test requirements: e) Steel ruler;
material or iron,
3.3 Test steps
Divide the prepared material group into two parts for standby. Put the test plate on the lifting rack with the specified height, and put the aggregate frame on the flat surface, put the sample into the sample, fill it with aggregate and scrape it flat, clean the material that falls from the frame, lift the aggregate cabinet slightly, make it have no connection with the test plate, and slowly raise one end of the half plate until the frame and the material start to slide together. When the plate starts to slide, the angle between the plate and the horizontal plane is 8. Repeat three times and take the maximum inclination angle as the fixed value. 3.4 Result calculation
The static external friction coefficient is calculated according to [] (rounded to the decimal point): x, = tang
Where: product: multi-friction coefficient of the material to be tested; external angle of the material, ()
3.5 Result evaluation
Take the arithmetic mean of the two test results as the report. If the error between the two results is less than 5%, repeat. 3.6 Test report
The test report shall be submitted in accordance with the requirements of 3.6 in [0142-12] 4 Determination of external friction coefficient
4.1 Method summary ||tt ||Through the test, the relative rate of the material in the test is measured, and the external friction coefficient of the material is calculated. 4.2 Instruments and tools for determining the external friction coefficient (Figure 2:
t) Two sets of standard bases: 1.2, 5kg
material and:
e) Steel ruler:
e) Test plate: 300mmx175mm×5mm. The material is determined according to the test requirements. 4.3 Test steps
Determination of external friction coefficient: only need to install the test plate into the sugar, connect the case to the channel. Add water to the tray, start to drive the sliding plate, add the cut-off cup and hydrated gravity P. in the tray: weigh 5 samples of the same weight, each weighing about 5, and keep them for use. Drag the sliding pole into the guide groove and fix it. The last sample is slowly and evenly poured into the material of the measuring instrument. And then loosen the sliding fixing pin, add water to the cup, and add water until the moving plate starts to slide. Record the combined weight P of the load plate and the water. Clean the slide plate and re-slide it. After half of the material is cleaned, add a weighing cover on the material and mark it with a number such as 1k. In the process of adding the sliding plate, weigh and record the combined weight P of the load plate and the water. Repeat the above process, and mark 2, 3, 5k on the material each time: the combined weight of the load plate and the water at the moment when the sliding plate starts to move, and record it. 5. Calculation of results: The external friction coefficient is calculated as (?) (accurate to two decimal places) H=
Where: The external friction coefficient of the material on the sliding plate: N
P: The combined force of the load cup and the loaded water in the first test, N: F: The combined force of the load cup and the loaded water in the empty load (wood plus material), Y: The combined weight of the material, the cover and the magnetic code in the material addition test, N: Test number:
6. The arithmetic mean of the results of the two tests is the dynamic external friction coefficient of the material. If the error of the test result is less than S%, the error is further increased.
Test report: Follow the test report 43 of 3.6 in JB9014.2-1999.
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