Some standard content:
JB/T 9007.2-1999
This standard is a revision of ZBJ80009
9-87 "Technical conditions for lifting pulleys". Compared with ZBJ80009-87, the main technical contents of this standard have the following changes: the content of wear test has been cancelled. This standard is part of the JB/T9007 "Lifting pulley" series of standards, which includes the following two parts: JB/T9007.1--1999 Lifting pulley models, basic parameters and dimensions JB/T9007.2-1999 Technical conditions for lifting pulleys This standard replaces ZBJ80009-87 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Lifting Machinery. The responsible drafting unit of this standard: Beijing Lifting and Conveying Machinery Research Institute. The main drafters of this standard: Wu Suoyun and Cui Zhenyuan. 132
1 Scope
Machinery Industry Standard of the People's Republic of China
Lifting Block
Technical Conditions
Specification for rope pulley blocksJB/T 9007.2--1999
Replaces ZBJ80009-87
This standard applies to manual and electric wire rope lifting blocks (hereinafter referred to as pulleys) with a rated lifting capacity of 0.32 to 320t, and its working level is M1 to M3 specified in GB/T 3811. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is released, 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. GB/T 197--1981
General technical rules for rolling bearings for tolerances and fits of common threads (diameter 1 to 355 mm)
GB/T 307.3-1996
GB/T 309-1984
GB/T 699--1988
GB/T 700-1988
GB/T 1176-1987
GB/T 1184--1996
GB/T 1801-1979
GB/T 3811-1983
GB/T 9439—1988
Rolling bearing needle roller
Technical conditions for high-quality carbon structural steel
Carbon structural steel
Technical conditions for cast copper alloys
Shape and position tolerances without tolerance values
Tolerances and fits to 500mm bore and shaft tolerance zones and fits Crane design specifications
Grey iron castings
GB/T 11352--1989
GB/T 13306--1991
GB/T 13384—1992
JB/T 4207.1—1999
3 Technical requirements
3.1 Material of main parts
- Carbon steel castings for general engineering
General technical conditions for packaging of electromechanical products
Hooks for manual lifting equipment
3.1.1 The mechanical properties of the hook and chain nut, center shaft, hanging shaft and hinge shaft shall not be lower than 45 steel in GB/T699. 3.1.2 The hook material shall comply with the provisions of JB/T4207.1. 3.1.3 The lifting ring and chain ring shall be 20 to 30 steel in GB/T699. 3.1.4 The mechanical properties of pulleys with a diameter less than or equal to 210mm should not be lower than HT200 in GB/T9439. The mechanical properties of pulleys with a diameter greater than or equal to 240mm should not be lower than ZG270-500 in GB/T11352. 3.1.5 The sliding bearing shall use ZCuAl10Fe3 aluminum bronze in GB/T1176. 3.1.6 When using powder metallurgy oil-containing bearings for sliding bearings, the following requirements shall be met: a) Surface hardness is 90~130HB;
b) Radial crush strength coefficient K is greater than 40; Approved by the State Bureau of Machinery Industry on 1999-06-28 and implemented on 2000-01-01
JB/T 9007.21999
c) Wear loss is less than 0.5mg/cm2 (wear loss when the bearing runs for 1km at a specific pressure of P=3000N/cm2, speed: =0.35m/s);
d) Oil content is greater than 15% (volume).
3.1.7 When using rolling bearings, the following requirements shall be met: a) Rolling bearings shall comply with the relevant provisions of G grade in GB/T307.3; b) Needle rollers shall comply with the provisions of GB/T309.
3.1.8 The partition, reinforcement plate and hinge plate shall adopt Q235A in GB/T700. 3.1.9 The raw materials entering the factory shall have a certificate of conformity. 3.2 Pulley
3.2.1 The machined surface of the pulley casting shall not have defects such as sand holes, pores, shrinkage holes, cracks and looseness, and the non-machined surface shall not have defects that affect the service life.
3.2.2 The radial and end face circular runout of the pulley shall not exceed 1.5/1000 of the bottom diameter of the pulley rope groove. 3.3 Hooks, chain links, lifting rings, hangers and beams 3.3.1 The surface of the forging shall be smooth and shall not have burrs, cracks, overlaps, overheating, overburning and other local defects that reduce strength, and defects are not allowed to be welded. The forged parts must be heat treated. 3.3.2 The center line of the hook handle is only allowed to deviate to the inside of the hook cavity center line, and the deviation shall not exceed 3% of the hook cavity diameter. 3.3.3 The symmetry of the center line of the ring handle to the center line of the chain ring cavity shall not exceed 3% of the cavity width. The thread accuracy (including the nut) shall not be less than 6H/6g in GB/T197. 3.3.4
The symmetry of the span of the ring and the center line of the cavity shall comply with the provisions of Table 1. 3.3.5
Symmetry between the span of the lifting ring
and the centerline of the ring cavity
>80>120
～120～180
≥180||250
～400
≤2.53.0≤3.5—≤4.0≤4.6—≤5.2≤5.7
～1000
7.0— 8.0—9.0
The parallelism between the contact surface of the beam and the nut to the two journals shall not exceed Grade 10 in GB/T1184. 3.3.7 The verticality between the centerline of the hole of the hanger and the beam and the contact surface of the nut shall not exceed Grade 8 in GB/T1184. 3.3.8 The coaxiality of the two journals of the crossbeam shall not exceed Grade 10 in GB/T1184. 3.3.9 The verticality of the two holes of the hanger to the center hole shall not exceed Grade 8 in GB/T1184. 3.4 Central axis, hanging axis, hinge axis
3.4.1 No cracks or defects that affect quality are allowed. 3.4.2 The central axis with sliding bearing pulley must be quenched and tempered, and its surface hardness is 26~32HRC. 3.5 Assembly
3.5.1 All parts and assemblies must be inspected and qualified, and purchased parts and outsourced parts must have a certificate of qualification before they can be assembled. 3.5.2 After the pulley is assembled, it should rotate flexibly without blocking or rubbing against the wheel rim. After the bearing is installed in the pulley, the radial and end face circular runout of the pulley shall not be greater than 2.25/1000 of the bottom diameter of the pulley rope groove. 3.5.3 There should be no blocking within the 90° range of the hinge opening and closing. 3.5.4 After assembly, the hook and chain ring should be able to rotate 360° flexibly. The pin of the nut should be riveted. 3.5.5 The clearance between the sleeve and the shaft after being pressed into the pulley should comply with the provisions of D11 in GB/T1801. 3.6 Paint
The exposed processed surface of the product should be coated with anti-rust oil, and it is not allowed to be stained or painted. The surface of the pulley groove should be coated with varnish, and the non-processed surface should be coated with primer and topcoat. Puttying is strictly prohibited. The machine parts need to be cleaned before painting. The paint should be evenly coated with bright color, and there should be no defects such as paint leakage, stains, marks, bubbles, shrinkage and shedding.
Test methods and inspection rules
4.1 Factory inspection
JB/T 9007.2-1999
4.1.1 Each pulley leaving the factory must be inspected and qualified by the inspection department of the manufacturer in accordance with the relevant provisions of this standard before leaving the factory. The products leaving the factory must have a certificate of conformity.
4.1.2 No-load inspection
Each pulley should be under no-load condition, and when the pulley, hook, opening and closing hinges and other rotating parts are rotated by hand, they must be flexible and free of obstruction.
4.1.3 Static load test
Pulleys produced in stable batches (materials, processes, etc. remain unchanged) shall be sampled according to the provisions of Table 2, and the test load shall be applied according to the provisions of Table 3, and unloaded after standing for 10 minutes. When checking the main parts, no cracks or permanent deformation shall be found, otherwise, double sampling shall be conducted. If there are still unqualified parts after double sampling, they shall be tested and accepted one by one.
4.1.4 Dynamic load test
Pulleys produced in stable batches (materials, processes, etc. remain unchanged) shall be sampled according to the provisions of Table 2, and the test load shall be slowly and steadily loaded according to the provisions of Table 4. Within the specified lifting height (generally not less than 2m), after the pulley rises and falls 15 times, each component shall not have permanent deformation, and the connection shall not be loose or damaged.
Rated lifting weight G.
16～50
80~160
200~320
Rated lifting weight G.
80~160
200～320
Rated lifting weight Gn
80~160
200-320
Number of random inspections
Test load
(3.2-~100) ×1.6
(160~500)×1.4
(800~1600)×1.3
(2 000~~3 200)×1. 25
Minimum number of units less than the number of random inspections
(equivalent to)
Test load
(equivalent to)
4.2 Type inspection
JB/T 9007.2-1999
The first batch of products must be subjected to type inspection. In order to assess the stability of design, process and quality during batch production, the products must be subjected to type inspection at least once a year. Whenever there is a change in the design, process and materials used for a product, a type inspection should also be conducted. The inspection items should include:
4.2.1 No-load inspection
The no-load inspection shall comply with the provisions of 4.1.2. 4.2.2 Static load test
The static load test shall comply with the provisions of 4.1.3. 4.2.3 Dynamic load test
The dynamic load test shall comply with the provisions of 4.1.4. 4.2.4 Test of main parts
4.2.4.1 Hook
Test and inspect according to the relevant provisions of JB/T4207.1. 4.2.4.2 Lifting ring
a) Before the test, drill holes at the blue points of the lifting ring A, B, and C as the measurement reference. The positions of points A, B, and C are shown in Figure 1. Point B is on the center line of the ring cavity and is located at the midpoint of the dangerous section; points A and C are on the center lines of the two ring handles and are located at the midpoint of the section at H/4. b) First add the rated lifting weight, and after eliminating the initial water-borne deformation, measure the reference values bi, b:, b3c) Load continuously in sequence according to the values specified in Table 5 to the maximum test load. After unloading, the permanent deformation values of .bl, b and b shall not exceed 1.75%, otherwise the lifting ring shall be judged as scrap.
4.2.4.3 Chain link
The test method of the chain link is the same as that of the lifting ring, and the measurement reference is shown in Figure 2. 4.2.4.4 Central axis and suspension axis
Load continuously in sequence according to the values specified in Table 5. The deflection value f after unloading (as shown in Figure 3) shall not exceed 1/500 of the span. 4.2.4.5 Partition plate and reinforcement plate
a) First add the rated lifting weight, and measure the reference value b after eliminating the initial permanent deformation; b) Load continuously in sequence according to the values specified in Table 5. After unloading, the difference in the b value of each plate should be less than H11 in GB/T1801 (measure the distance between the two holes on the outside, as shown in Figure 4).
4.2.4.6 Hinge
a) Before the test, drill holes at points A and B of the hinge as the measurement reference. Points A and B are located on the symmetrical center line of the hinge and are symmetrical to the center line of the hinge axis (as shown in Figure 5). The b value is the hook size plus 2 times the R value. b) When the load is 2 times the rated lifting weight, the change in b value shall not exceed 0.25%: When the load is the static strength test load, it should be able to support the load. When measuring the value after unloading, the wire rope shall not be loose. 4.2.5 Static Strength Test
Carry out random inspection according to the minimum number of units specified in Table 2, and load in sequence according to the test load specified in Table 5. When the load reaches the test load, it must be maintained for 5 minutes. The pulley is required to reliably support the load. Figure 1
Rated lifting capacity Gh
0.32～10
80~160
200～320
5 Marking and packaging
5.1 Marking
Static strength test load
JB/T9007.2—1999
Load values applied in sequence
First timebzxZ.net
Second time
Third time
Fourth time
5.1.1 Each pulley should have a product label. Product labels shall comply with the provisions of GB/T13306. The labels shall generally indicate: a) product name; b) product model; c) rated lifting capacity; d) applicable wire rope diameter; e) product trademark; f) manufacturing date and manufacturer name. 5.1.2 Permanent marks shall be placed on the obvious parts of hooks, chain links and lifting rings, with the rated lifting capacity marked on one side and the trademark or factory mark on the other side. 5.2 Packaging The packaging of products shall comply with the provisions of GB/T13384 when they are shipped out. 1376 Hinges
a) Before the test, drill holes at points A and B on the hinge as the measurement reference. Points A and B are located on the symmetrical center line of the hinge and are symmetrical to the center line of the hinge axis (as shown in Figure 5). The b value is the hook size plus twice the R value. b) When the load is 2 times the rated lifting weight, the change in the b value shall not exceed 0.25%: When the load is the static strength test load, it should be able to support the load. When measuring the value after unloading, the wire rope shall not be loose. 4.2.5 Static Strength Test
Carry out random inspection according to the minimum number specified in Table 2, and load in sequence according to the test load specified in Table 5. When the load reaches the test load, it must be maintained for 5 minutes. The pulley is required to reliably support the load. Figure 1
Rated lifting capacity Gh
0.32～10
80~160
200～320
5 Marking and packaging
5.1 Marking
Static strength test load
JB/T9007.2—1999
Load values applied in sequence
First time
Second time
Third time
Fourth time
5.1.1 Each pulley should have a product label. Product labels shall comply with the provisions of GB/T13306. The labels shall generally indicate: a) product name; b) product model; c) rated lifting capacity; d) applicable wire rope diameter; e) product trademark; f) manufacturing date and manufacturer name. 5.1.2 Permanent marks shall be placed on the obvious parts of hooks, chain links and lifting rings, with the rated lifting capacity marked on one side and the trademark or factory mark on the other side. 5.2 Packaging The packaging of products shall comply with the provisions of GB/T13384 when they are shipped out. 1376 Hinges
a) Before the test, drill holes at points A and B on the hinge as the measurement reference. Points A and B are located on the symmetrical center line of the hinge and are symmetrical to the center line of the hinge axis (as shown in Figure 5). The b value is the hook size plus twice the R value. b) When the load is 2 times the rated lifting weight, the change in the b value shall not exceed 0.25%: When the load is the static strength test load, it should be able to support the load. When measuring the value after unloading, the wire rope shall not be loose. 4.2.5 Static Strength Test
Carry out random inspection according to the minimum number specified in Table 2, and load in sequence according to the test load specified in Table 5. When the load reaches the test load, it must be maintained for 5 minutes. The pulley is required to reliably support the load. Figure 1
Rated lifting capacity Gh
0.32～10
80~160
200～320
5 Marking and packaging
5.1 Marking
Static strength test load
JB/T9007.2—1999
Load values applied in sequence
First time
Second time
Third time
Fourth time
5.1.1 Each pulley should have a product label. Product labels shall comply with the provisions of GB/T13306. The labels shall generally indicate: a) product name; b) product model; c) rated lifting capacity; d) applicable wire rope diameter; e) product trademark; f) manufacturing date and manufacturer name. 5.1.2 Permanent marks shall be placed on the obvious parts of hooks, chain links and lifting rings, with the rated lifting capacity marked on one side and the trademark or factory mark on the other side. 5.2 Packaging The packaging of products shall comply with the provisions of GB/T13384 when they are shipped out. 137
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