This standard specifies the types, basic parameters and dimensions of electromagnetic block brakes. This standard applies to normally closed block brakes with brake electromagnets as driving devices. JB/T 7685.1-1995 Types, basic parameters and dimensions of electromagnetic block brakes JB/T7685.1-1995 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Electromagnetic block brake
Type, basic parameters and dimensions
1 Subject content and scope of application
JB/T 7685.1-
This standard specifies the type, basic parameters and dimensions of electromagnetic block brakes (hereinafter referred to as brakes). This standard applies to normally closed block brakes with brake electromagnets (hereinafter referred to as electromagnets) as driving devices. 2 Reference standards
JB/T7021.1 Block brake connection dimensions Block brake
JB/T 7021.2
Brake shoe
JB/T 7021.3
Block brake brake pad
3 Types, basic parameters and dimensions
3.1 Types
3.1.1 Brakes are divided into AC and DC types according to their power supply. 3.1.2 Brakes are divided into ordinary and metallurgical types according to the different environmental conditions of their application sites. The electromagnet of the brake is generally installed on the upper part of the brake (see Figure 1); it can also be installed in the middle (see Figure 2). 3.1.3
3.1.4 Model indication method
3.1.5 Marking example
Environmental condition code; ordinary type is omitted, metallurgical type is YBraking torque, N·m
Brake wheel diameter, mm
Power supply type: AC code is omitted, DC code is Z-Product code
a. Brake wheel diameter is 400mm, rated braking torque is 1250N·m, power supply is AC ordinary brake It should be marked as:
Brake MW400-1250JB/T7685.1--95; b. The metallurgical brake with a brake wheel diameter of 400mm, a rated braking torque of 1250N·m, and a DC power supply should be marked as: Brake MWZ400-1250YJB/T7685.1--953.2 Basic parameters and dimensions
3.2.1 The basic parameters and dimensions of the brake shall comply with the provisions of Figure 1, Figure 2 and Table 1. 3.2.2 The dimensions of the brake shoe shall comply with the provisions of JB/T7021.2. 3.2.3 The dimensions of the brake pad shall comply with the provisions of JB/T7021.3. Approved by the Ministry of Machinery Industry of the People's Republic of China on June 16, 1995 186
Implemented on July 1, 1996
JB/T7685.1—1995
3.2.4 The basic parameters of the electromagnet shall comply with the provisions of Table 2. K
Under the reference working mode
Brake
Rated backlash of each side shoe
Rated braking torque Rated operating rate
Brake
JB/T 7685.1bzxz.net
Continued Table 1
Note: ①) The brake structure may not be consistent with the diagram, but is only required to comply with the given dimensions. 1995
② The rated backlash is generally the minimum backlash, and the maximum allowable backlash is determined by the manufacturer, but there should be clear regulations. The reference working mode is: continuous and intermittent cycle working mode, and the load factor in the intermittent cycle working mode is 40%. Table 2
Brake specifications
Rated suction
Rated working
Working range
When installed at
upper part
When installed at
middle part
When installed at
upper part
When installed at
middle part
Note: () Rated holding force is the holding force in the reference working mode. 315
20 000
② Rated working stroke refers to the minimum stroke, and the maximum allowable stroke is determined by the manufacturer. Additional Notes:
This standard was proposed and managed by the Beijing Hoisting and Conveying Machinery Research Institute of the Ministry of Machinery Industry 2.24
1:410
16 0001 20 000
This standard was drafted by Dalian Hoisting Machinery Factory, and Tianshui Great Wall Control Electric Factory, Beijing Hoisting and Conveying Machinery Research Institute, Jiaozuo Brake Factory, Shenyang Hoisting Electric Factory, etc. participated in the drafting. The main drafters of this standard are Nie Chunhua, Liu Wusheng, Wang Zhendong, Cong Huari, Yin Jingli, and Ma Yuqi. From the date of implementation of this standard, GB6334-86 "DC Electromagnetic Block Brake" will be invalid. 188
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