This standard specifies the series, marking type, basic dimensions, technical requirements, test methods and inspection rules of piston-type mechanical brakes (hereinafter referred to as brakes) for vertical hydro-turbine generators. The brakes specified in this standard have two functions: braking and lifting. This standard is applicable to vertical hydro-turbine generators with requirements for braking and lifting rotating parts. For bulb-type hydro-turbine generators that do not require lifting functions and do not have locking mechanisms, but have requirements for forced braking and shutdown, this standard can be used as a reference. All matters not specified in this standard shall comply with the relevant provisions of GB/T 7894. JB/T 3334.1-2000 Brakes for hydro-turbine generators Part 1: Brakes for vertical hydro-turbine generators JB/T3334.1-2000 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T3334.1
2000-04-24
Wa Xianji Dong
2000-10-01
JB/T3334.12000
This standard is a revision of JB 3334-83 Brakes for Hydro-turbine Generators. The standard for brakes for hydro-turbine generators is divided into two parts: Part 1: Brakes for vertical hydro-turbine generators: Part 2: Brakes for horizontal hydro-turbine generators.
This standard is Part 1: Brakes for vertical hydro-turbine generators. The main contents are as follows:
1 Compiled according to GB/1 requirements.
2 The basic size series of brakes in the original standard is added, and the content related to brake structure is cancelled. 3 The meaning of the model is different from the original standard
4 The jacking oil pressure is increased from 12.5 MPa to 16 MPa. 5 Chapter 2 of the original standard is modified. 6 The test method and inspection rules of Chapter 3 of the original standard are modified. 7 Chapter 4 of the original standard is modified.
8 The material requirements, friction coefficient and wear coefficient in Appendix A of the original standard are modified. This standard replaces JB3334-83 from the date of implementation. Appendix A of this standard is the appendix of the standard.
This standard is proposed and managed by Harbin Taiji Electric Machinery Research Institute. The drafting units of this standard are Tianjin Alstom Hydropower Equipment Co., Ltd., Shanghai Lingsheng Technology Co., Ltd., Harbin Electric Machinery Co., Ltd., Dongfang Electric Machinery Co., Ltd., and Tianjin Power Generation Equipment General Factory. The main drafters of this standard are Li Liansheng, Chen Yanghui, Han Linsheng, Ye Fan, Ma Enjun, and Liu Jingcai. This standard was first issued on July 27, 1983 and revised for the first time in December 1999. Harbin Electric Machinery Research Institute is responsible for the interpretation of this standard. I
JB/T3334.12000
JB33341983
This standard specifies the series, marking type, basic dimensions, technical requirements, test methods and inspection rules of piston-type mechanical brakes (hereinafter referred to as brakes) for vertical hydro-turbine generators. The brakes specified in this standard have two functions: braking and lifting. This standard is applicable to vertical hydro-turbine generators with requirements for braking and lifting the rotating parts. For bulb-type hydro-turbine generators without lifting function requirements and locking mechanisms, but with forced braking and stopping requirements, this standard can be used as a reference. All matters not specified in this standard shall comply with the relevant provisions in GB/T7894. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the 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 version of the following standards. GB/T7894—2000 Basic technical conditions for hydro turbine generators 3 Structural types and models
3.1 This standard divides the brake into two types according to the way its piston is reset after braking or pre-starting operation, one is forced reset by compressed air, and the other is reset by other methods. The specific structural type of the brake is not specified in this standard. 3.2 Brake model
The model specified in this standard consists of five parts, whose arrangement and meaning are as follows: Symbol area for manufacturer's own use, which can indicate structural features; content; Piston reset method symbol, air pressure reset is Q, other method points are F; Brake case diameter, mm
The first letter of the Chinese pinyin of "vertical"; The first letter of the Chinese pinyin of "brake"; Model marking example: The brake piston diameter is 200mm, reset by compressed air, and its model is: ZL200-Q. WA 2000-04-24
2000-10-01
Basic parameters and basic dimensions
4.1 Basic parameters
a) Rated braking and reset air pressure: 0.7MPa: b) Rated starting oil pressure: 16Pa;
c) Brake pad friction coefficient: 0.35~0.4; d) Brake pad wear coefficient: ≤0.4mm/ha4.2 Basic dimensions
Basic dimensions as shown in 1 and Table 1 and Table 2 As shown, d-
Piston diameter
Live case diameter
5 Technical requirements
Live case stroke
Piston stroke
JB/T3334.1
Table 1 Basic dimensions of brakes
Brake block size
160×100×30
200×125×35
250×160×38
315×200×38
400250×40
500×315×40
630X400X40
Overall height of brake
Table 2 Basic dimensions of brakes
Brake resolution
150× 105× 35
230×160×3
300×220×35
400×280X35
460×360×35
Overall height of brake
Bottom hole distribution size
150X110—18
180×140-Φ18
220X170—D26
285×210-Medium 26
340×260—Φ34
420×320—@34
540×410—Φ40
Bottom hole distribution size
150×100-Φ18
200×120Φ26
2X180-Medium 26
380×20 0 in 34
420×28040
Base size
180×140
210×170
260×210
335X260
400×320
500x400
630×500
Base size
12X
180X130
210×250
320X260
440×280
500×360
5.1 The brake system should be able to ensure the requirements of non-continuous braking to shutdown of the turbine generator set during the shutdown process under the condition that its system meets the requirements of brake air pressure. The conditions should comply with the relevant provisions of 6B/T 894. 2
JB/T3334.12000
5.2 The structural design of the brake should be safe and reliable, and easy to inspect and maintain. 5.3 During the braking and lifting process, the piston should be able to move flexibly and reset quickly. 5.4 The brake pad should be installed firmly and easy to replace. 5.5 The performance of the brake pad should meet the requirements of Appendix A. 5.6 The brake should be equipped with a reset signal device. 5.7 The brake should be equipped with a mechanical locking mechanism. 5.8 The brake should be able to prevent debris and dust from entering the brake cylinder. 5.9 The seals used in the brake should comply with the relevant national standards. 5.1 For brakes with spring reset, the spring should comply with the relevant national standards. 5.11 The protective paint film on the outer surface of the brake should be firm and durable, have a good gloss, uniform color, no missing paint, no sag, adhesion of foreign matter and other defects.
6 Test methods and inspection rules
6.1 Each brake can only leave the factory after passing the test and inspection. 6.2 The test methods and inspection rules shall be in accordance with the provisions of Table 3. Table 3 Test methods and inspection rules
Test and inspection items
Stroke test
Reciprocating performance test
Air seal test
Pressure leakage test wwW.bzxz.Net
Test and inspection methods
Brake inflation causes piston to rise
Use compressed air to make the piston reciprocate three times throughout the stroke. Inflate the brake to raise the piston to the highest point and press it to the rated brake air pressure for a duration of 2 in
Brake oil is filled to raise the piston to the highest point of the stroke, and then it is required that the piston can rise to the maximum stroke and meet the design requirements. Each time it should be reset flexibly
The air pressure drop should not exceed 0.05MPE
The oil pressure drop should not exceed 3% of the test oil pressure. There should be no leakage on the cylinder body and no reset on the cylinder surface. After repeated two times, fill the oil to 125 times the rated oil pressure at the highest point of the stroke, and keep the oil overflowing for 30min
6.3 Appearance inspection: The outer surface of the brake should be flat and smooth, with beautiful paint and no bruises. Packaging, transportation and storage
The packaging, transportation and storage of the brake should comply with the relevant provisions of GB/T7894. JB/T3334.1
Brake pad
A1 The material of the brake pad shall preferably be asbestos-free. 2 The surface roughness of the brake pad shall be Ra12.5.
A3 The mechanical strength performance of the brake pad shall meet the following conditions: A3.1 The compressive strength shall be greater than or equal to 20MPa. A3.2 The impact strength shall be greater than or equal to 0.4MPa. A3.3 The Brinell hardness shall be 25~～40 HBS.
A4 After the brake pad is kept at 300℃ for 30min, there shall be no burns, cracks and permanent deformation. 5 The brake pad shall be continuously braked at an air pressure of 0.7MPa, with a linear speed of 20m/s and a temperature of 300C. A5
A5.1 The friction coefficient shall be 0.35~0.4.
A5.2 The friction coefficient shall be less than or equal to 0.4mm/h. The water absorption rate of the brake pad shall be less than or equal to 2%, and the oil absorption rate shall be less than or equal to 1%. A6
Brake pads should be accompanied by a product certificate
880b1230
19XX nest XX cabin
100044
Dai section x/X
Rectangle XXX.XXX
19XX nest XX ridge
Purchase XXX.XX guest
Pengxian pole key sticker
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