JB/T 8846.2-2001 This standard is a revision of JB/T 8846.2-1999 "Technical conditions for dry steering clutches of crawler bulldozers". During the revision, test methods and inspection rules, mechanical performance parameters of parts were added; technical requirements for reliability and cleanliness were supplemented; the materials of some castings were changed. This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of dry steering clutches of crawler bulldozers. This standard is applicable to multi-plate dry spring-loaded mechanical separation steering clutches of crawler bulldozers above 74kW. This standard was first issued in June 1987 as ZB J85 007.2-87, and the standard number was adjusted to JB/T 8846.2-1999 in 1999. This is the first revision. JB/T 8846.2-2001 Technical Specifications for Dry Steering Clutch of Crawler Bulldozers JB/T8846.2-2001 Standard download decompression password: www.bzxz.net

IC553.100
Machinery Industry Standard of the People's Republic of China
JB/T8846.2-2001
Crawler type bulldozer--Dry type steering clutchtechnicalspecificatious
Published on April 3, 2001
Published by China Machinery Industry Federation
2001-10-01 Implementation
JB/T8846.2—2001
This standard is a revision of B/T8846.2—1999 (Technical Records of Steering Clutch, etc. for Crawler-type Pusher). Compared with JB/T8846.2—1999, the main technical contents of this standard have been changed as follows: two chapters on test methods and inspection specifications have been added; the technical requirements for clutch assembly maneuverability and cleanliness have been supplemented; the mechanical properties of various parts have been added to Table 1; in order to improve product quality, the cast iron materials of some parts have been changed to ductile iron castings. This standard will replace JB/T8846.2—1994 from the date of implementation. This standard is issued by Jicheng Industrial Engineering Machinery The Standardization Technical Committee of Vietnam will propose and coordinate. The drafting units of this standard are: Dajing Machinery Charging Institute, Yingkou Fenghua Industrial and Mining Equipment Factory, Yingkou Engineering Machinery Separator Factory, Guanjin 6443. The main drafters of this standard are Qi Chengzhen and Hu Niliang. This standard was first issued in June 198 as J8507.2-87, and the standard number was revised to JB/T8846.2-1999 in 1999. This is the first policy you
[Model of the People's Republic of China Machinery Industry Standard
Technical Conditions for Dry Steering Clutch of Crawler Bulldozers
typebullduzurDrytype steeringelutehtechnical epecifications
JB/T8846.2--2001
BIB/T8846.2—1999
This standard specifies the technical requirements, test methods, inspection markings, packaging, transportation and storage of the card-type steering clutch (hereinafter referred to as the card-type clutch) of the belt-type bulldozer. This standard is used for the multi-plate spring-loaded clutch of the belt-type bulldozer. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard is published, the versions shown are valid. All parts of the standard may be revised. The parties using this standard should consider the applicability of the latest version of the following standard: GR/T12.19.21989
GT2828—198?
GB.T 57641996
GB/T1Q095—19BB
JB/T 1666—1997
JB/TS937—1991
JB/T $938—1991
JB/I$935—1991| |tt||JBI59299
JS/T6031—1992
JB/T 71581993
3 Technical requirements
Technical conditions for cold-rolled compression springs Translation batch inspection counting sample holding procedure and sample table (applicable to inspection of ten consecutive batches) Automobile clutch facing
Material hardness determination method
New round gear seat
Belt-type push-pull machine type test method
.L. General technical conditions for machinery grey iron castings
General technical conditions for engineering machinery parts
General technical conditions for engineering machinery steel castings
General technical conditions for engineering machinery self-forgings General technical parts for engineering machinery steel forging General technical parts for engineering machinery quality determination method for engineering machinery parts 3.1 The components of the clutch shall comply with the provisions of this standard and be manufactured according to the product drawings and technical specifications approved through the prescribed procedures. 3.2 The mechanical properties of the following clutch components shall comply with the provisions of Table 1. 3.3 In addition to meeting the technical requirements of the drawings, castings and forgings shall also meet the requirements of H/T5938, JB/T5939, JB/T5942 and JB/T603.
3.4 ​​The geometric tolerances, surface roughness and dimensional tolerances of the main parts of the dry clutch shall meet the requirements of the drawings, and the gear precision shall be GB/1009 grade 10 or above
China Machinery Industry Federation 2001-04-03 approved 2D01-10-01 implementation
Jin 6.2-2001
3.5 In addition to meeting the technical requirements of the drawings, the internal spring and the external spring shall also meet the relevant provisions of B/1239.2. The friction performance of the dry clutch shall meet the requirements of GB5764. 3.6
Parts name
Active drum
Driven drum
Release inspection enclosure
Storage replacement piece
Inner spring 4
External spring 3.5
Niuka shaft
Material number
QT500-7
ZG310570
Asbestos grade
Embedded spring yellow
40CrMnM
Note: The material brand is used as teaching test.
1520~1760
1470~t710
170~243
170-23(1
3. All main parts of the dry clutch should be cleaned and the cleanliness of the clutch assembly should not be higher than 8mgmT. Confirm coefficient
(12034)
3.8 The non-durable surface shall not have cracks, oil leakage, sand jumping and rust. . The parts should be painted, and the joints should be connected in grooves, without peeling, missing paint, etc.
3.9 The surfaces of the internal gears, springs, shaving blades, bolts, etc. should be rust-proof. 31 The adjusted clutch should be able to separate completely and engage smoothly. When fully engaged, it should be able to transmit the torque of the main engine when turning. When the clutch is separated and the driven drum brake is applied, the bulldozer can turn smoothly. 3.11 The half-mean trouble-free working time (MTRF) shall not be less than 50 0h3.12 The service life of the clutch plate shall not be less than 1200h, and the service life of the assembly shall not be less than 2000h. 4 Test methods
4.1 The inspection of the cleanliness of the clutch castings, gear steel parts and forgings shall be carried out in accordance with the provisions of [BT59373/T5938, B/T5939: JB/T5942 and JB/T6031].
4.2 The inspection of the cleanliness of the clutch assembly shall be carried out in accordance with the provisions of [BT59373/T5938, B/T5939: JB/T5942 and JB/T6031]. 4.3 The test of the clutch plate's contact performance shall be carried out in accordance with the provisions of GB 5764: 4.4 The steering performance and reliability of the dry clutch shall be tested with the host machine in 1 place, and the plate shall be carried out in accordance with the relevant provisions of 1BT1666. 5 Inspection rules
5.1 Each set of the following clutch must be inspected by the inspection department of the manufacturer before it can leave the factory. The inspection includes appearance quality, size and assembly quality.
5. Type inspection The type inspection items of the clutch are as specified in Table 2. Sampling inspection shall be carried out in accordance with the provisions of GDT282B, using a normal sampling plan. Class A products shall be inspected at S-3; Class A and Class C products shall be inspected at Level II. Generally, the control range is N-16-25, and the qualified quality level (AQL) shall be determined in accordance with the provisions of Table 2 or by negotiation between the supply and demand parties. During the inspection, if the number of unqualified items for each item is equal to or less than the corresponding qualified judgment number (Ac), the batch of products shall be accepted. Class A products shall not be accepted, and Class B products shall not be accepted. Class A products shall not be accepted, and Class B products shall not be accepted. Reliability inspection
Fitting performance
Main seasonal parts mechanical properties
Final shape
Cleanliness
Main parts size
Parts position
Assembly quality record
Description
Appearance quality
Main parts surface connection
6 Marking, packaging, transportation and storagewwW.bzxz.Net
6.1 Each set of clutches shall be marked with the manufacturer's name or factory logo, and the specifications of the clutches shall be indicated. Check the water semi-circular
(2 Each set of clutches shall be rust-proofed before packaging, and shall be wrapped with strong and impermeable neutral paper or plastic film before being packed in the packaging box.
(.3 The packaging box shall be accompanied by the product certificate and packing list.6.4. The packaging box should indicate:
the manufacturer's name, location and department number;
b) product name, model and specification;
weight and total mass;
"Be careful", "Don't get wet" and other signs; c) date of manufacture.
6.5. The packed dry clutch should be placed in a ventilated, dry warehouse. Under the proper storage conditions, the manufacturer should ensure that the clutch is corrosion-free for 12 months from the date of manufacture.
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