JB/T 8519-1997 This standard is a revision of ZB D93 002-88 "Disc brakes for mine hoists and mine winches". This standard is a mandatory standard for the machinery industry. This standard specifies the basic parameters, technical requirements, test methods and marking, packaging, transportation and storage of disc brakes for mine hoists and mine hoist winches. This standard applies to disc brakes used in pairs for mine hoists and mine hoist winches. JB 8519-1997 Disc brakes for mine hoists and mine hoist winches JB8519-1997 Standard download decompression password: www.bzxz.net

JB8519-1997
This standard is a revision of ZBD9300288 "Disc brakes for mine hoists and mine winches".
This standard shall be implemented from October 1, 1997. From the date of entry into force, it shall replace ZBD93002. This standard is proposed and managed by the National Technical Committee for Standardization of Mining Machinery. The responsible drafting unit of this standard is Luoyang Mining Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Pei Yulan, Huang Liping, Zhang Jiliang, Guo Ming, and Yang Xianli.
This standard is entrusted to the National Technical Committee for Standardization of Mining Machinery for interpretation. 324
Machinery Industry Standard of the People's Republic of China
Mine Hoist and Mine Hoisting Winch
Disc Brake
JB8519--1997
Replaces ZBD93 002--88
This standard specifies the basic parameters, technical requirements, test methods and marking, packaging, transportation and storage of disc brakes for mine hoists and mine hoisting winches.
This standard applies to disc brakes used in pairs for mine hoists and mine hoisting winches. 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 will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards GB191-90 Packaging, storage and transportation pictorial signs
JB3721--84 Disc brake shoes for mine hoists JB3812--84 Disc springs for disc brakes for mine hoists and mine winches TJ231 (six)-78 Construction and acceptance specifications for mechanical equipment installation projects Coal mine safety regulations (1992 edition)
3 Basic parameters
The basic parameters of disc brakes should comply with the provisions of Table 1. Table 1 Basic parameters of disc brakes
Brake positive pressure
10.20.25,32.10,50.63.80
120,150
Design friction coefficient bZxz.net
The design friction coefficient refers to the friction coefficient when the brake shoe temperature is not higher than 250C. 1
When the design brake shoe pressure ratio is ≤1.2MPa, it is applicable to large DC-driven mine hoists. 4 Requirements
4.1--General requirements
Design brake shoe pressure ratio
4.1.1 Disc brakes shall comply with the requirements of this standard and be manufactured in accordance with the drawings and technical documents approved by the prescribed procedures. 4.1.2 Disc brakes shall comply with the provisions of the "Coal Mine Safety Regulations". 41.3 Accessories shall comply with the provisions of current standards or technical documents. 4.1.4 All general technical requirements such as casting, forging, welding, processing and assembly not specified in this standard shall comply with the relevant provisions of current national standards or industry standards.
4.2 Requirements for main components
Approved by the Ministry of Machinery Industry of the People's Republic of China on March 4, 1997 and implemented on October 1, 1997
JB8519
9—1997
4.2.1 The technical performance of disc springs shall comply with the provisions of Chapter 2 of JB372184. 4.2.2 The main technical parameters of disc springs such as the working limit load, deformation under the working limit load, calculated stress at 1 point and strong pressure treatment load shall comply with the provisions of 1.3 of JB3812-84, and the technical requirements shall comply with the provisions of Chapter 2 of JB3812-84. 4.2.3 The product shall be equipped with a venting device.
4.2.4 After the product is assembled, the piston and brake shoe shall act simultaneously under the design oil pressure, and there shall be no creeping or jamming. 4.2.5 Under no-load conditions, the minimum operating pressure of the disc brake piston shall not exceed 0.3MPa. 4.2.6 Under the design oil pressure, the difference between the stroke of the disc brake shoe and the design stroke shall not be greater than 10% of the design stroke. 4.2.7 After the product is assembled, it is kept at 1.25 times the design oil pressure for 10 minutes, and no oil marks are visible on the seals. 4.2.8 The service life of the disc brake cylinder seal shall not be less than 3 months or 4×101 lifts. 4.2.9 When the product is installed, adjusted and tested on site, it shall comply with the relevant provisions of TJ231 (VI). 4.2.10 After the disc brake is installed and adjusted on site, the difference in the clearance between the brake shoes on both sides of each pair of brakes shall not be greater than 0.1mm plus the actual maximum runout of the brake disc.
5 Test and Inspection
5.1 Factory Inspection
Each product shall be subject to the following factory inspection before leaving the factory: a) The performance test of the disc spring shall be carried out in accordance with the provisions of Chapter 3 of JB3812-84; b) The product performance shall meet the requirements of 4.2.5, 4.2.6 and 4.2.7; c) Under the design oil pressure, the disc brake shall reciprocate for more than five times in full stroke to check whether the product meets the requirements of 4.2.5. 5.2 Type Inspection
When the product is manufactured for the first time, the structure is changed, the material is modified, and the production is transferred to another factory, in addition to meeting the factory inspection requirements, the product shall also meet the following requirements:
a) The positive pressure of the disc brake shall meet the requirements of Table 1; b) The service life of the cylinder seal shall meet the requirements of 4.2.8 5.3 The product shall be installed, debugged and operated by the user at the site of use in accordance with the manufacturer's instruction manual, and shall meet the requirements of 4.2.9 and 4.2.10.
6 Marking, packaging, transportation, storage
6.1 When a product leaves the factory alone, a label should be fixed in a conspicuous position, and the content is as follows: a) Product name and model;
b) Main technical parameters;
c) Manufacturer name;
d) Manufacturing date.
6.2 After the product passes the test, all exposed oil ports should be sealed with plastic or metal oil plugs. Paper, cotton yarn, wooden plugs and other debris are prohibited. 6.3 The exposed processed surface of the product should be coated with anti-rust grease. 6.4 The technical documents shipped with the product should include: a) Instruction manual
b) Certificate of conformity;
c) General drawing.
6.5 The packaging should be moisture-proof and must be firm and reliable. 6.6 The markings on the outer wall of the packaging box should comply with the provisions of GB191. 326
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