This standard specifies the series, marking type, basic parameters, basic dimensions, technical requirements, test methods and inspection rules of brakes for horizontal hydro-generators. Any matters not specified in this standard shall comply with the relevant provisions of GB/T 7894 and GB/T 15468. JB/T 3334.2-2000 Brakes for hydro-generators Part 2: Brakes for horizontal hydro-generators JB/T3334.2-2000 Standard download decompression password: www.bzxz.net

JB/T3334.2--2000
This standard is divided into two parts. Part 1: Brakes for vertical hydro-turbine generators; Part 2: Brakes for horizontal hydro-turbine generators. This standard is formulated to meet the development of my country's hydropower construction and to achieve the standardization, serialization and generalization requirements of brakes for horizontal hydro-turbine generator sets.
This standard is Part 2 and is formulated for the first time.
Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by Harbin Large Electric Motor Research Institute. The drafting units of this standard are: Fujian Jiuzhou Nanping Electric Motor Factory and Kvaerner (Hangzhou) Power Generation Equipment Co., Ltd. The main drafters of this standard are: Yue Zhaozhi, Jin Zhende, Liu Xilou and Li Daihu. Harbin Large Electric Motor Research Institute is responsible for the interpretation of this standard. 180
1 Scope
Machinery Industry Standard of the People's Republic of China
Brake for hydraulic generator
Part 2: Brake for horizontal shaft turbine-generator unitJB/T3334.22000
This standard specifies the series, marking type, basic parameters, basic dimensions, technical requirements, test methods and inspection rules for brakes for horizontal shaft turbine-generator unit.
All matters not specified in this standard shall comply with the relevant provisions in GB/T7894 and GB/T15468. 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 published, 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/T7894—2000 Basic technical conditions for hydro-turbine generators GB/T11120--1989 L--TSA steam turbine oil (neqISO 8068:1987) GB/T15468—1995 Basic technical conditions for turbines JB/T3334.12000 Brakes for hydro-turbine generators Part 1: Brakes for vertical hydro-turbine generators 3 Structural type and model
3.1 The brake type specified in this standard is a piston brake with air (oil) pressure braking and reset. 3.2 Brake model
The manufacturer can use the symbol area to indicate the structural features, etc. Working medium: Q for air, Y for steam turbine oil-brake piston diameter, mm
The first letter of the Chinese pinyin for "horizontal" and the first letter of the Chinese pinyin for "brake" Model marking example: brake piston diameter 100mm, working medium air, its model is: zw100-Q. 4 Basic parameters and basic dimensions
4.1 Basic parameters
4.1.1 When the working medium is air, the rated working pressure is 0.7MPa. 4.1.2 When the working medium is turbine oil, the rated working pressure is 2.5MPa Approved by the State Bureau of Machinery Industry on April 24, 2000, implemented on October 1, 2000
4.2 Basic dimensions
The basic dimensions are shown in Figure 1 and Table 1.
ZW80-Q
ZW100-Q
ZW125-Q
ZW160-Q
ZW200-Qbzxz.net
ZW50-Y
ZW63-Y
ZW80-Y
ZW100-Y
5Technical requirements
Piston diameter
Overall dimensions
155×220X70
170X240×70
200X270X 90
JB/T3334.2--2000
Basic dimensions of brake
Foot fixing dimensions
L ×B,-
60×170±18
60×180—$22
75X195$26
250X320X110
320×400X130
170×240×70
200X 270X 90
250X320X110
320×400×130
100X220—$32
125X 26038
60×180-$22
75×195$26
100X220—$32
125 × 260 -$38
Bottom plate length
The technical requirements of the brake shall comply with the relevant provisions of JB/T3334.1. 6 Test methods and inspection rules
6.1 Each brake shall be tested and inspected before leaving the factory. 6.2 Test methods and inspection rules According to the provisions of Table 2, 182
Brake block size
$80×25
$80×25
$100X28
$125×30
$160×35
$80× 25
$100X28
$125×30
p160×35
Except for special requirements of users,
brake stroke is
30mm, inlet and exhaust screw holes
are Re1/2
Test and inspection items
Pressure test
Leakage test
Stroke test
Reciprocating performance test
Air sealing test
(not for hydraulic brake)
JB/T 3334.2—2000
Table 2 Test methods and inspection rules
Test and inspection methods
Use oil as the test medium to push the piston to the full-stroke braking position, and then conduct a pressure test in accordance with the relevant provisions of GB/T15468
During the pressure test, observe the leakage of the brake outer surface, pipe joints, handle surfaces and movable mating surfaces
Measure the full stroke length
Use 15% of the rated working force to fully push the piston Stroke reciprocating motion three times
Pass 0.7MPa air pressure at full stroke brake position to maintain pressure for 2min
The pressure gauge reading should not drop by more than 3% of the test oil pressure
No leakage
Conform to design requirements
All can move smoothly and flexibly
The air pressure drop should not exceed 0.05MPa
6.3 Appearance inspection: The outer surface of the brake should be flat and smooth, painted beautifully, and should not have defects such as bruises. Packaging, transportation and purchase and storage
The packaging, transportation and storage of brakes should comply with the relevant provisions of GB/T7894. 183
JB/T 3334.2—2000
(Appendix of the standard)
Brake pads
Brake pad materials should preferably use asbestos-free brake pad materials: A1
Surface roughness should not be less than Ra12.5.
The mechanical strength of the brake pad should meet the following conditions: A3.1 The compressive strength is greater than or equal to 20MPa. A3.2 The impact strength is greater than or equal to 0.4MPa. A3.3 The Brinell hardness is 25~~40HBS.
The brake pad shall not have burns, cracks or permanent deformation after being kept warm for 30min at 300C. A4
The brake pad shall be continuously braked at an air pressure of 0.7MPa, a linear speed of 20m/s and a temperature of 300C to ensure: A5
A5.1 The friction coefficient is greater than or equal to 0.35~0.4. A5.2 The friction coefficient is less than or equal to 0.4mm/h. A6 The water absorption rate of the brake pad is less than or equal to 2%, and the oil absorption rate is less than or equal to 1%. A7 The brake pad should be accompanied by a product certificate. 184
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.