This standard specifies the structural type, basic parameters and main technical requirements of the fork chain and its scraper for buried scraper conveyor. It also specifies the tooth groove shape, basic parameters and main dimensions and tolerances of the fork chain sprocket. This standard applies to the fork chain, scraper and sprocket for buried scraper conveyor specified in GB/T 10596.1 (hereinafter referred to as chain scraper and sprocket respectively). JB/T 9154-1999 Fork chain, scraper and sprocket for buried scraper conveyor JB/T9154-1999 Standard download decompression password: www.bzxz.net

JB/T9154-1999
This standard is a revision of ZBJ18006--90 "Fork-type chain, scraper and sprocket for buried scraper conveyor". During the revision, only editorial changes were made to the original standard, and the main technical content remained unchanged. This standard replaces ZBJ18006-90 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by the National Chain Drive Standardization Technical Committee. The drafting unit of this standard: Chain Drive Research Institute of Jilin University of Technology. The main drafters of this standard: Yang Gang, Wang Yixing, Li Jiyu, Zhou Yisheng. 324
1 Scope
Machinery Industry Standard of the People's Republic of China
Forked chains, scrapers and sprockets for buried scraper conveyors
Drag chains ,types Y,drags and chain wheelsJB/T9154—1999
Replaces ZBJ18 006-90
This standard specifies the structural type, basic parameters and main technical requirements of forked chains and their scrapers for buried scraper conveyors. It also specifies the tooth groove shape, basic parameters and main dimensions and tolerances of forked chain sprockets. This standard applies to forked chains, scrapers and sprockets for buried scraper conveyors specified in GB/T10596.1 (hereinafter referred to as chains, scrapers and sprockets respectively).
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision and parties using this standard should investigate the possibility of using the most recent versions of the following standards. GB/T985-1988 Basic type dimensions of weld grooves for gas welding, manual arc welding and gas shielded welding GB/T1184—1996 Tolerances of shape and position without tolerance values ​​GB/T1800.31998 Basis of tolerances and fits Part 3: Numerical tables of standard tolerances and basic deviations GB/T18011979 Tolerances and fits Dimensions up to 500mm holes, shafts tolerance zones and fits GB/T1804-1992
General tolerances Unspecified tolerances for linear dimensions
GB/T 9785—1988
Terms for chains and sprockets
GB/T10596.1—1989 Scraper conveyor 3 Terms
Types and basic parameters
The terms of this standard are shown in Figure 1 and Tables 1 to 4, and at the same time conform to the provisions of GB/T9785. 4 Chain
4.1 Structural type
The chain is connected by scraper links or different combinations of scraper links and electric traction links. The scraper link is composed of chain rods, scrapers, pins, washers and locking parts. The traction link is the same as the scraper link except that it does not have a scraper. The structural type and components of the chain (taking the V-shaped scraper as an example) are shown in Figure 1, which does not fully reflect the actual shape of the parts. 4.2 Basic parameters and main dimensions
The specifications, basic parameters and main dimensions of the chain are specified in Table 1, and its parameter code is shown in Figure 2. Approved by the State Bureau of Machinery Industry on June 28, 1999 and implemented on January 1, 2000
MCL112
MCL160
MCL224
MCL315
MCL630
MCL900
JB/T9154-1999
Chain rod head
(nominal)
Locking piece
(nominal)||tt ||Chain cup Chain rod
Handle width Aperture groove depth
Chain number consists of letters and numbers. The letters are the Chinese phonetic symbols of the scraper fork chain. The numbers represent the minimum tensile load measured in dry Newton (kV).
Chain rod thickness S is for reference in designing sprockets
4.3 Marking
4.3.1 Marking method
The marking method of the chain is as follows:
4.3.2 Marking example
JB/T 9154 -- 1999
Standard number
Scraper type code and installation interval number (no suffix when the interval is zero)-Number of chain links
Chain pitch
Minimum tensile load of 160kN, pitch of 200mm, 250 sections, T-shaped scraper interval number of 2 for buried scraper conveyor: MCL.160X200-250T2JB/T9154—19994.4 Technical requirements
4.4.1 Minimum tensile load
Under the action of continuous and slow tensile load, the minimum tensile load of unused chain segments should meet the requirements of Table 1. The effective tension chain segment should have at least 3 chain links, and the connection between the two ends of the forging segment and the chuck of the testing machine It must be ensured that no additional stress is generated on the chain parts. During the test, if the chain link connected to the chuck is damaged, the test is invalid. The tested chain cannot be used again. 4.4.2 Chain length accuracy
The chain length accuracy should be measured according to the following requirements: a) The chain should be cleaned before measurement;
b) The measured chain should be placed horizontally and supported in the measuring chain segment; c) After applying the measuring load, measure the distance between the generatrix on the same side of the meshing part of the chain rod and the sprocket; d) The measured number of chain links, measuring load and actual chain length dimensions should comply with the provisions of Table 2. 327
Chain pitch p
4.4.3 Flexibility test
Measure the number of chain links
JB/T 9154-1999
Measurement loadwww.bzxz.net
1/50 of the minimum tensile load
The links of the chain should be flexible to rotate without interference or jamming. 5 Scrapers
Limited chain length dimensions
This standard specifies four basic scraper types suitable for fork chains: T-shaped, V-shaped, U-shaped and H-shaped. The scraper can be manufactured separately or made into one piece with the chain rod. Other types of scrapers are allowed without affecting normal meshing, and their outer dimensions should comply with the provisions of this standard.
5.1 Structural type
T-shaped scraper see Figure 3a);
V-shaped scraper see Figure 3b);
U-shaped scraper see Figure 3c);
H-shaped scraper see Figure 3d).
5.2 Basic parameters and main dimensions
The cross-section of the scraper can be square or circular. Its basic parameters and main dimensions are specified in Table 3, and the parameter codes are shown in Figure 3. 5.3 Technical requirements
5.3.1 Where the scraper and the chain rod are welded, the weld is not allowed to have defects such as cracks, slag inclusions, incomplete fusion, and incomplete penetration; the weld groove shall comply with the provisions of GB/T985.
5.3.2 When the scraper and the chain rod are integrally cast, cracks, sand holes and loose holes are not allowed, and the casting fillet must be guaranteed. 5.3.3 For unused scraper chain links, the breaking strength of the connection between the scraper and the chain rod shall comply with the provisions of Table 3. 328
JB/T 9154—1999
a)T-shaped
b)V-shaped
c)U-shaped
d)H-shaped
80|100125160200250315
JB/T 9154.--- 1999
U-shaped, V-shaped, H-shaped
Scraper height
Note: The height H of T-shaped scraper is equal to the height of chain rod 6 Sprocket
6.1 Tooth groove shape
2901330
Diameter or side width of U-shaped, V-shaped, H-shaped scraper section
12~-18
16~-20
! Plate and
U-shaped, V-shaped, H-shaped
T-shaped scraper
Connection between scraper and chain) Connection between chain rod
Plate thickness
Breaking load
Breaking load
The tooth groove shape and parameters of sprocket are shown in Figure 4 and Table 4 and Table 5. Other sprocket tooth groove shapes that have been shown to have good meshing performance in actual use are allowed.
Calculated pitch of sprocket
Number of sprocket teeth
Calculated pitch circle diameter
Meshing circle diameter
Auxiliary circle diameter
Tooth tip circle diameter
Tooth groove diameter
Tooth profile arc radius
Tooth root circle radius
Tooth tip length
Tooth groove width
Tooth top arc radius
Tooth bottom arc radius
Tooth groove fillet radius
Chain rod head radius
Chain rod thickness
JB/T 9154—1999
Calculation formula or explanation
The common number of teeth ranges from 8 to 12. The minimum number of teeth shall not be less than 6in(180°/z)
d'=d.-o.2p.
d.--d.+o.5d.+(0~6)mm
(de75)
da=d+0.25d. +(0~10)mm(do≥>75)dg md.cos 180°_ do
r. =p—ri, the center of the circle should be on the circumference of the auxiliary circle ri=0.505d
E=(0.6~0.8)d
bg--(1.5~2)S| |tt||bt-(4-4.5)S
rx=(2～3)mm
r;=: (8~10)mm
r,=(2 ～3)mm
coefficient, between 1.4 and 2.0, see Appendix A (Standard Appendix): The maximum original deviation of the sprocket basic pitch is between (0.00250.008), see Appendix A. AK
Axial tooth profile
110°～105°
Axial tooth profile see Figure 5 and Table 4.
6.3 Sprocket tolerance
JB/T 9154--1999
Table 5 Recommended values ​​of angle/2, Φ
13°30
6.3 .1 After the sprocket is processed, use the template shown in Figure 6 (other parameters see Figure 4) to check the manufacturing accuracy of the gear teeth. During measurement, the template is in contact with the gear tooth circle and straight teeth, and there should be no interference between the template and other parts of the gear teeth. , and the gap should not be greater than 0.5mm. The dimensional accuracy and geometric accuracy of the sample are manufactured according to the 8th grade of tolerance specified in GB/T1800.3 and GB/T1184 respectively. The dimensional tolerance and geometric tolerance of the sample are independent of each other. Sample The nominal values ​​of the dimensions are shown in Table 4 and Table 5. The tolerance is allowed to deviate from the outside. 1
6.3.2 The circular runout of the sprocket hub end face shall comply with the provisions of Table 6. Table 6
Item name
Hub end face runout
GB/T 1184- 1996
6.3.3 Tooth defect tolerance
Sprocket tooth defect tolerance The regulations are shown in Table 7.
Tooth tip diameter
6.4 Mark
JB/T9154—1999
Tolerance zone
GB/T 1801--1979
GB/T 1804—1992
GB/T 1804-1992
A mark should be made at an appropriate position on the side of the sprocket. The content of the mark includes: the chain matching the sprocket The chain number, pitch, number of teeth and rotation direction of the sprocket should be marked in a visible position during installation. The symbol indicating the direction of rotation should be the actual direction of rotation of the sprocket. When the sprocket tooth profile is different from the tooth profile specified in this standard, add an "×" after the mark. The outer surface of the chain rod should be marked There are chain numbers, arrows indicating the direction of chain movement, and manufacturer trademarks or factory names. 333
A1 sprocket calculation pitch P. The values ​​are shown in Table A1. Chain pitch force
JB/T9154| |tt||Appendix A
(Standard Appendix)
Calculation table of sprocket pitch P.
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