This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage rules for industrial variable speed wide V-belts (hereinafter referred to as "belts"). This standard is mainly applicable to wide V-belts used for transmission in the speed change device of general industrial machinery, and is not applicable to V-belts used in motor vehicles and agricultural machinery. GB/T 15327-1994 Industrial variable speed wide V-belts GB/T15327-1994 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Variable-speed-changers wide V-belts for industry
Variable-speed-changers wide V-belts for industry1Subject content and scope of application
GB/T15327-94
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage rules of industrial variable-speed wide V-belts (hereinafter referred to as "belts").
This standard is mainly applicable to wide V-belts used for transmission in the speed change device of general industrial machinery, and is not applicable to V-belts used on motor vehicles and agricultural machinery.
2 Reference standards
GB3686 Test method for tensile properties of full cross-section of V-belts GB3688 Test method for bonding strength between V-belt cords and rubber GB/T12733 Dimensions of wide speed-changing V-belts for industrial use GB/T12735 Fatigue test method for V-belts for agricultural machinery 3 Product classification
3.1 Structural form
The structure of wide speed-changing V-belts for industrial use is divided into two types: cloth-wrapped type and cutting type. It is composed of cloth-wrapped, top rubber, tensile body, bottom rubber and other components (as shown in Figure 1).
Tensile body
Cloth-wrapped type
Figure 1 Structure
3.2 Specification series
The model size and reference length series of the belt shall be implemented in accordance with the provisions of GB/T12733. 3.3 Marking
Marking example:
Approved by the State Bureau of Technical Supervision on December 22, 1994
Cutting standard
“Tensile body
Implementation on October 1, 1995
4 Technical requirements
GB/T15327—94
Angle,.
Benchmark length, mm
-Height, mm
Section width model| |tt||The reference length and exposed height of the belt shall comply with the provisions of GB/T12733. 4.1
The appearance quality of the belt shall comply with the provisions of Table 1.
Defect name
Depression and bulge on the top and bottom surfaces
Longitudinal seam of the wrapping cloth detached
Cut of the wrapping cloth at the corner of the belt
4.3The physical and mechanical properties of the belt shall comply with the provisions of Table 2. Type
Tensile strength
The depth and height shall not exceed 1 mm, and the cumulative area shall not exceed 6% of the total area of ​​the top and bottom surfacesWww.bzxZ.net
The width shall not exceed 5 mm; the length shall not exceed 40 mm; the number of places shall not exceed 2 places. The cumulative length of each side of the outer wrapping cloth shall not exceed 30% of the belt length, and the inner wrapping cloth is not allowed to have
Not allowed to have
The side (working surface) of the belt is not allowed to have wrinkles, cracks, longitudinal seams and other defects. The width of the single-sided flash edge on the top surface of the belt shall not exceed 0.5 mmTable 2
Reference force elongation
4.4W50 type belt should also be subjected to fatigue life and outer circumference change rate tests, and the requirements are: a.
The fatigue life of the cutting belt shall not be less than 200h, the fatigue life of the cloth wrapping belt shall not be less than 100h, the rubber and cord bonding strength
≥, kN/m
GB/T15327--94
When the specified life is reached, the elongation of the belt shall not be greater than 2%; b.
cThe test results are expressed as the average value of the test values ​​of 2 specimens. 5 Test method
5.1 The dimension measurement of the belt shall be carried out in accordance with GB/T12733. 5.2 The full-section tensile strength and reference force elongation tests of the belt shall be carried out in accordance with GB/T3686. The reference force shall be as specified in Table 3. Table 3
Reference force
5.3 The cord and The rubber bonding strength test is carried out in accordance with GB/T3688. 5.4 The fatigue life and outer circumference change rate test of the belt is carried out in accordance with GB/T12735. 5.4.1
The belt fatigue life test and outer circumference change rate test pulley shall be in accordance with Table 4 and Figure 2. W63
The tension in the belt fatigue life and outer circumference change rate test shall be 1176±12N, the driving wheel speed is 2500±50r/min, and there is no torque.
Basic dimensions
Limit deviation
W50148.000
6 Inspection rules
Basic dimensions
Limit deviation
6.1 The belt shall be inspected and accepted by the quality inspection department of the manufacturer. ±0.25
Figure 2 Test pulley
6.2 The belt shall be inspected for size and appearance quality one by one. d
Basic dimensions
Limit deviation
Basic dimensions
Limit deviation
6.3 The same type and material of belts shall be batched with no more than 2000 pieces. In each batch of products, a specified number of samples shall be taken for physical and mechanical property inspection, but not less than once a month. 6.4 The fatigue life and outer circumference change rate tests for W50 type belts of the same material shall be conducted once every six months. 275
GB/T 15327-94
6.5 If two of the test items such as physical and mechanical properties and fatigue tests are unqualified, double samples shall be taken from the batch of products for retesting the unqualified items. If one of the two retest results still does not meet the requirements, the batch or the products of the period shall be unqualified. 7 Marking, packaging, transportation, storage
7.1 Each belt shall have obvious marks that cannot be washed off, including the following: a. b. Manufacturer name or trademark,
c. Product grade,
d. Year and month of manufacture.
7.2 The belts shall be bundled and packed according to the model and specification. 7.3 During transportation and storage, the belts shall be kept away from direct sunlight or rain and snow, kept clean, and prevented from contact with substances that affect the quality of the belts, such as acids, alkalis, oils and organic solvents, and mechanical damage and kept 1m away from the heating device. 7.4 During storage, the warehouse temperature should be kept between -18 and +40℃, and the relative humidity should be kept between 50% and 80%. During storage, the belts should be prevented from being deformed by excessive weight. It is best to hang the belts on a crescent-shaped rack or place them flat on the shelf. Additional remarks:
This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Qingdao Rubber Industry Research Institute. This standard is drafted by Shanghai Adhesive Tape Co., Ltd. The main drafters of this standard are Lu Rongyao, Wang Liping, Wu Linrong, Li Yufeng and Yu Bing.
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