This standard specifies the types and basic parameters of caliper disc brakes. This standard applies to wheel loaders with a machine weight of 3.5~38t, and also to wheeled vehicles such as scrapers and graders. JB/T 7156-1993 Types and basic parameters of caliper disc brakes JB/T7156-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Caliper disc brake
Type and basic parameters
Subject content and scope of application
This standard specifies the type and basic parameters of caliper disc brake. JB/T 7156
This standard applies to tire loaders with a machine weight of 3.5~～38t, and also to tire vehicles such as scrapers and graders. 2 Types and basic parameters
2.1 Type
The type of caliper disc brake is a fixed-caliper double-space opposed type. According to the number of pistons, it is divided into the following three types: a.
Single-piston two-way opposed type;
Double-piston two-way opposed type;
Three-piston two-way opposed type.
2.2 Basic parameters
2.2.1 The diameter of the brake disc shall comply with the provisions of Table 1. Table 1
(410)
Note: The dimensions in brackets are non-preferred dimensions
The diameter of the hydraulic cylinder and the outer diameter of the brake shall comply with the provisions of Table 2. Table 2
Hydraulic cylinder diameter and piston outer diameter d
Dimension series and basic parameters should comply with the provisions of Table 3 Dimension series
(brake disc diameter and hydraulic cylinder diameter)
$360450
$400×50
($410X$50)
Effective braking
Single piston
Double-way opposed type
Approved by the Ministry of Machinery Industry of the People's Republic of China on November 21, 1993 298
Braking force, Nm
Hydraulic pressure, MP
Double piston
Double-way opposed type
Double-way opposed type
Implemented on March 1, 1994
Dimension series
(brake disc diameter × hydraulic cylinder diameter)
$450 50
$360×$63
$400X$63bzxZ.net
$450$63
$450 0×5
$560#75
1560580
$630X380
$700480
Effective braking
JB/T7156
Continued Table 3
Single-acting piston
Double-acting piston
Braking torque.N·m
Hydraulic cylinder oil pressure, MPa
Double-acting piston
Double-acting piston
21 750
Note: ①The braking torque in the table is the recommended value, which is calculated by taking the friction coefficient μ: 0.35. The calculation formula is shown in Appendix A (reference part). Piston
Double-acting piston
Double-acting piston
(②)The size series in brackets are non-preferred ones. ③ Any dimension in the brake disc diameter D in Table 1 and any dimension in the hydraulic cylinder diameter in Table 2 can be combined to form a derived series (brake disc diameter × hydraulic cylinder diameter), which is not preferred. 299
Calculation of braking torque
The calculation of braking torque is in accordance with formula (A1):
JB/T 7156-·93
Appendix A
Calculation of braking torque
(reference)
Where: M—braking torque of a caliper disc brake. N·m; p
hydraulic cylinder pressure, MPa;
hydraulic cylinder area, mm2,
effective braking radius, m;
number of hydraulic cylinders.
Calculation of effective braking radius
The effective braking radius R is the distance from the center of the hydraulic cylinder to the center of the brake disc. The calculation is based on formula (A2): R
Additional instructions:
This standard was proposed and managed by the Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Tianjin Engineering Machinery Research Institute and Xuzhou Engineering Machinery Bridge Box. The main drafters of this standard are Yang Xiuwen and Wang Zhongru. 300
(A1)
(A2))
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