Some standard content:
[CS 21. 14n
Machinery Industry Standard of the People's Republic of China
JB/T 87251998
Rotary pressure joints
1998-03-19 Issued
Ministry of Machinery Industry of the People's Republic of China
1998-07-01 Implementation
JB/T 87251998
This standard is issued and approved by the Machinery Industry Ministry's Mechanical Seal Standardization Technical Committee. The responsible drafting units of this standard are: Shandong Mezhou Yadong Adapter Manufacturing Factory, Hefei General Machinery Mold Research Institute of the Ministry of Machinery Industry, Shandong Lianzhou Yadong Energy Adapter Research Institute.
The main drafters of this standard: Zhang Jiaxin, H Kang, Ding Shimin, Liu Zongjun, Chen Shan, Jin Zhaoshan, Scope
Machinery Industry Standard of the People's Republic of China
Rotary joint
Rotary pressure JB/T8725-1998 This standard specifies the type, structure, identification mark, technical requirements, test and technical requirements of the mechanical seal structure of the flow joint (hereinafter referred to as the condensation joint), which is applicable to the one-way or two-way joint and its similar sealing seal, and is used for the equipment and joints of the machine for continuous non-leakage (or within the prescribed leakage range) to deliver the fluid. Its working parameters are: medium pressure 0~2MPu: temperature 0-20℃: speed not more than 1500r/min, nominal diameter of the rotating head is 15--80mm: mainly used for steam, superheated water, hot water, etc. 2 Reference standards The texts contained in the listed standards are all cited in the standards and become the texts of this standard. When the technical standards are published, the texts shown are valid. All standards will be reviewed, and parties using non-standard standards should consider the following possibilities to measure new versions: t8379
B/T 113:-I006
JL/T6374-92
JB/T7757.295
ZBJ2201789
ZR J32 022---SG
3.1 Single choice adapter
Screw effect collection, starting distance, back force, chamfer size, shape and other tolerances, the final tolerance requirements for machine sealing, silicone sealing ring, machine sealing, heart-shaped rubber cavity, mechanical sealing, alloy sealing ring, graphite sealing ring, mechanical sealing, filling material, ethylene and jujube, diene rubber field adapter, a family of adapters that only have the function of introducing or radiating the fluid medium, 3.2 Double choice adapter
A family of adapters that only have the function of introducing and discharging the fluid medium. 3.3 Two-way internal fixed adapter
Two-way energy adapter with rotating outer tube and rotating angular velocity + internal tube quality does not rotate 3.4 Two-way internal rotating rotary excavator
Energy adapter, the outer tube can rotate with the rotating body at two angular velocities, 3.5 Separation
Between dynamic and static, no need to remove the sealing ring of dynamic or static synchronization, 3.6 The nominal size of the rotary head
and the nominal length of the outer tube (for two-way adapter) of the rotating equipment or the hollow shaft (for one-way adapter). Approved by the Ministry of Machinery Industry 58310
1908-17-n1 Implementation
4 Structural type. Technical integer
4.1 Junction type
JB/Ta725199B
family adapter basic structural integral types include spherical sealing surface structure and plane replacement surface structure, respectively represented by Q and P. The structural type and code of the adapter are shown in Table 1. The junction type and code of the adapter are: sealing type
single sister return seal, side yellow return type junction
national research tube core type junction
spherical surface research, the elastic cost of this structure
plane pass, the elastic volume effect is affected by the combination of competitive The plane of the component structure is made of non-ferrous metal, and the body of the structure is made of elastic material. The single-in-one type is a commonly used structure and is no longer represented by the inch area. 4.2 According to the technical set, the connection, support, stop structure, hollow shaft, connecting building, rotation stop, support structure, hanging point, and pole control, rotation stop structure are modified. There are dynamic bearings (other railings) structure, double-tube internal control structure, 4.2.1 Q type: spherical sealing structure, typical single structure see 1. 2 and Figure 3 technical data see Table 2. Figure 110000000 heart type
Figure 220000HH0QG type
Pull technology and
(KIKIKIIXG type
JB/T8725
h)20 QIXP type
Two H drilling grids2600060Q1XG quantity
Table 2Q type aviation adapter technical parameters
Medium plate pressure
Main building size
Nominal size, 15=4mm
Nominal size, ~8mm
15.20, 25.32, 40, 53, 65, 50Steam company hot water. Hot water
4.2.2PB type : Surface density selection. Spring-yellow micro-texture price combined single-sex element structure, typical structure type is shown in Figure 4 and Figure 1, and the main parameters are shown in Table 3.
aUuUurPn
JB/T8735—1998
1000000 type
[Other materials are the same as Figure 1D00000FB type』
Figure 4 (first)
)200GDCDPB type
b)2000 PEF
「The rest of the structure is the same as the KOOOP type in the figure?
Technical parameters
All capital pressure
Highway size
JB/T87251998
Left 3PB electric adapter technical parameters
Nominal size, 15~-40 yuan
Nominal size, >40--60mru
15--80
Oil, steam, water, air
4.2.3PY type: flat and sealing surface joint, usually made of metal material, typical structure type see Figure G and Figure 4. Technical parameters are shown in Table 4,
Figure 619000001
The structure of the case is the same as 4:1XIx.HB case
72C0C090PY
PY type energy conversion loss technical parameters
Exogenous force
Absent school partner
Nominal size
Water, oil and gas
Nominal size: 8~25mD:
Nominal size:>25-50tuln
Nominal size 50~
19, t5, 2G, 25, 32, 41.55, F5, 80 No. 154c
5 Identification mark
JR/T8725-1998bzxZ.net
The identification mark of the stirrer joint is expressed by type determination (position) and the table adopts the method to meet the following requirements: 000
5.2 Standard example
Structural type
Use Latin letters or digits plus Arabic numerals and half footnotes to indicate the table, see 4.1. If you are not satisfied, you can omit the inner tube meter:
Use Arabic numerals to indicate, when the teaching letter is less than three digits, use the outer alignment in the front reverse, and when there is no inner bone in the single space, all 0s are added
Outer tube (single digit for hollow shaft or tube\Nominal size is indicated by Arabic numerals. When the number is insufficient, the first digit is indicated by Arabic numerals. 1 indicates single digit, 2 indicates double digit, and the first digit 2 indicates the size of the outer tube in mm. The third, sixth and seventh digits are indicated by 02 indicating the nominal size of the inner tube in mm. The letter Q plus the footer indicates a single ball sealing surface spring built-in structure. It indicates a rotation-stop structure. 6 Technical requirements
6.1 Material requirements
6.1.1 Common materials for adapters are shown in Table 5. In addition to the materials listed in Table 5, other materials that can meet the requirements of use can be used. Table 5 Common Carbon Adapter Materials
Signature Training Materials
Light Station Type Quality Taiwan Enterprises
Design Review Gold Same Acceptance
Metal Surface Stress
Yanbei Code
Jia Aluminum
High Foundation Screening
Environment Filled with Four West Ethylene
Density Ratio Materials
Underworld Dilemma
Strong Component Materials
War Penetration Disease
Steel || tt||Station Jindao
Piece inspection materials
Female Haizhen
Can be omitted
Casting Xie alloy
JB/T8725—1998
.1.2 Cemented carbide. Fe chemical Korean. Magnetic name oxygen required irradiation ring shall comply with the relevant provisions of 2BJ22003, JB/T6274, 213J22017 respectively. 1.3 Rubber and polytetrafluoroethylene end seals shall comply with the provisions of JB/T7757.2 and 2BJ2222. There shall be no defects such as scratches, cracks, creases, etc. on the surface.
6.2 Requirements for key components
(21) Requirements for flatness and surface roughness of the sealing surface: a) When the sealing surface is a flat surface, its flatness shall comply with the requirements of Class 2 in GB/T118419S6 b) When the sealing surface is a sealing surface, the surface roughness shall be 0.4um c) When the sealing surface is a spherical surface, the surface roughness shall be RC. Room; d) When the sealing surface of the floating space is a coal surface, the surface roughness shall be R08um6.22 The sealing rings filled with polyethylene rings and paper-wrapped sealing rings shall be subjected to water pressure test. The acid pressure test shall be 3.25 times of the design pressure, and there shall be no static pressure for 1min.
6.23 The inner hole tolerance of the transmission seat is F9. The surface roughness is 3.2um1. ≤.2.4 The parts should not have any defects.
2.5 The angle should meet the requirements of GB3. 2.6 The shape and position tolerance of the parts should meet the requirements of GB/T111-199G Class C. 2.7 Before assembly, the surface of the parts should be cleaned of impurities such as sludge and debris. The radiated parts should be especially cleaned. It is strictly forbidden to enter the seal.
6.2.8 The appearance of the product should be smooth and flat, without concave and convex defects. The oil should be evenly and firmly applied. The surface should be treated with sludge. 6.3 Performance requirements
a) Static pressure test: The leakage should not exceed 1L/h; b) Operation test: The leakage should not exceed n./h. The special conditions of use in Chapter 1 are not subject to this restriction. 63.2 Wear, running 100h, the seal damage is not more than 0.02mm, 3.3 Life: The service life of the adapter is not less than 5 million, but the rotary joint must be reasonably selected and installed correctly. For special conditions beyond the scope of Chapter 1, this restriction is not included. 7 Test and inspection methods
［Test method
1, 1. 1 Pressure test
Use a pressure gauge to measure the pressure. The test pressure is 1.25 times of the highest working pressure and is maintained for 10 minutes. The test medium is water or rust-proof water. The test result shall comply with the provisions of 6.3.1.
T.1.2 Operation test
The test medium is demand or protection water. The test pressure is the design minimum speed and the speed is the design special speed. The operation test result shall comply with the requirements of 5.3. Operation time: type test 100h: conversion test run 5b.7.1.3 Use fixed value and variable value display to measure and check the workmanship and assembly quality by hand. The inspection result shall comply with the provisions of 6.2.T.2 Specification
2.I The transmission joint shall be accompanied by a certificate of conformity after inspection at the manufacturer. 7.2.2 When any of the following situations occurs, type test shall be carried out and shall be delayed as required by the standards: a) when new products or old products are produced in the factory for trial type identification; b) after normal production, when there are major changes in structure, materials, and processes, and the performance changes after one year of storage in the warehouse; ) when the quality control organization is requested to conduct quality control inspection. 7. 2.3 Inspection frequency JB/T 8725 1998 Take one batch of actual goods as a batch, and increase the inspection by 20% each time (but not more than two pieces), and double the inspection of items that do not meet the requirements of the wood standard.
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