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Machinery Industry Standard of the People's Republic of ChinawwW.bzxz.Net
JR/T8293.1-1999
Floating seal
1999-08-06 Issued
National Machinery Industry Bureau
2000-01-01 Implementation
JB8293.1—1999
This standard is a revision of 2B18300488. Compared with 18300488, the main technical contents of this standard are as follows: Table 1 (main dimensions of oil seal ring and O-shaped seal) and Table 2 (main dimensions of floating seal seat) in the original standard are merged to form a unified series table! And the 32 specifications in the series are expanded into 5B specifications. Special simplified parts: the original standard floating seal bad technical requirements No. plus static sealing performance test, requirements to maintain! 0m no leakage: the original standard 0-shaped circle technical requirements in the small tear strength from 1372N/am to not less than 10MPa: the minimum breaking piece, length 350% monitoring to not less than 250%:
the original standard floating seal seat technical requirements in the radial drying hand 0.tmm to coaxiality 0.12mm to add floating oil seal assembly technical requirements, a total of 6 items; "the original standard Section 5 and test, changed to Chapter 6 inspection category, divided into two categories: inspection, packaging, transportation, storage, root help rubber product characteristics, independent or clause: this standard from the date of reading the travel to replace 2B [8300488 non-standard towel process machinery standardization technical committee proposed and returned. The drafting units of this standard are: Tianjing Engineering Machinery Research Institute, Nanjing Metallurgical Machinery Research Institute, Hebei Jinhuayi Machinery Factory, Jiangsu People's Machinery Factory, Xuzhou Huatong Floating Oil Seal Factory, Ministry of Railways Powder Metallurgy Factory, Shanghai Pengpu Machinery Seal Factory, and Xuzhou Machinery Factory of the Ministry of Railways. The main drafters of this standard are: Li Mingxiang, Yu Jiang, Xue Huaao, Zhao Xiaoqin, Xie Zengjun, Huang Buling, Zhou Liuguan, and Zhang Xuhe. It was first published in March 1985.
1 Scope
Machinery Industry Standard of the People's Republic of China
Floating seal
Floating seal
JB/T 8293.1—1999
B183004-88
This standard defines the requirements, shape and size series of main parts, requirements, inspection categories, packaging, transportation and shipping of floating seals for engineering machinery.
This standard is applicable to floating seals with dynamic sealing function on the traveling parts and speed reduction parts of engineering machinery with a diameter of 1-608mm, and can be used in other parts of machinery. 2 Referenced standards
The provisions contained in the following standards become the provisions of this standard through reference in foreign standards. When this standard is published, the versions shown are all effective. All standards will be revised. Departments using these standards should explore the possibility of using the latest versions of the following standards: B/572—1993
JB/T5947—1991
IB/TS293.2999
3 Definitions
The following definitions are adopted in this standard:
Special provisions for marking, packaging, transportation and storage of rubber sealing tapes General technical conditions for packaging of engineering machine boards
Floating liquid seal test force 3.1 Net dynamic seal ring, scal
The axial cross section is in the shape of a horse, and the floating effect type increased surface seal ring (hereinafter referred to as the detailed seal ring) is made of iron alloy material. The floating seal ring hits the skin against the book, one rotates with the rotating part, and the other is relatively stationary. The two floating seal rings and the ends that are attached to each other are called seals, also known as belts, see!.
Approved by the State Machinery Industry Bureau on August 6, 1999
2000-01-01 Implementation
3.20 O-ring
JB8293.1-1999
refers to the axial filter surface is a mesh-shaped filter ring with a relatively large diameter. It is used with the floating ring. After being clamped in the axial direction, it is deformed and stores elastic energy, which promotes the sealing of the two floating rings and produces dust pressure. 3.3 Floating seal seat colaT
refers to the seat cavity containing the inner female surface, which supports the O-shaped net and the floating seal ring and keeps the two in a certain position. It is divided into two parts at different positions, and the axial assembly size is used to ensure that the floating seal does not generate pressure on the surface. 3.4 Floating seal ftloating scaz
refers to the combination of the floating seal ring and the O-ring after they are matched, also known as the floating seal brush. 4 Basic shapes and size series of main parts 4.1 Small shapes of floating seal ring, O-ring and floating seat The assembly structure of floating ring, O-ring and floating seal seat is shown in Figure 1, and the basic shapes are shown in Figures 2, 3 and 4: 4.2 Floating seal ring, O-ring and floating seal size series The main sizes and series of floating seal ring, O-ring and floating seat are shown in Table 1, Figure 3 Floating seal ring
Floating seal seat
Figure 3 Floating seal
51×38×10
58 × 47 × 12 5
60: 46 × 12 | 14
42 U8-72.616
03×*74.6:4.3
93.3×74.6-14.5
100×20×15
10992-
110-91-16
117×04×10.3
119-103×16
120*96*16
137115-16
38×116×16
140-[21×14
141×[24×[
151MM Lh | |tt | 00>173×20
..68..
JB/T8293.1-1999||t t||Floating oil seal seven size series
Floating (position
210.5x162-19
216×190×22
21k[8?19
227-2I155
24021715
24G*220-18
251.5-223-19
26U-228×14
280253-39||tt| |300-272-20
329-300-20.4
3.30300×2.5
337×319×24)
348*32-20
368×340.20.4
370×340×20
394× 366-19
400370×21
403×38120.4
450 x420x×21
454×424×21
457429-18
5(00×170-25
548-507-3(
608>58021.8
Floating seal ring, heart-shaped mark
Clean ring mark:
JB/T8293.1-1999
丨(End)
O-shaped diagram
Student average seat (exam value!
The nominal size of the floating seal ring is 93mm, the inner diameter is 74.mm, and the thickness is 14.5mm, which is called: floating seal 93×71.6×15823.1—1999
0 Retrieval mark Example:
0 The nominal inner diameter of the ring is nm, and the cut diameter is 9mm, which is marked as: 80×9[R.T8291-1999
5.1 Requirements for net rings
JB/T8293.1—1999
5.1.! The floating seal ring shall be manufactured according to the same and technical documents approved by the prescribed procedures, and shall meet the requirements of the small standard. 5.1.2 The material of the floating seal ring must meet the use requirements of the floating oil station. 5.1.3 The hardness of the end face of the floating seal ring shall be 60~72HRC.5.1.4 The outer and inner surfaces of the floating seal ring shall not be defective, scratched or dented. 5.1.5 The milling surface of the floating ring shall be smooth and polished, without any particles adhering or obvious protrusions. The coaxiality of the cone surface to the reference axis shall not be greater than 0.3mm:
5.[.6 The static sealing performance test of the sealing rings in pairs shall be maintained within 1 meter without leakage. 5.2 Requirements
5.2.! The profile shall be replaced according to the drawings and technical documents approved by the prescribed procedures and meet the requirements of this standard. 5.2.2 The profile shall be made of industrial rubber material. 5.2.3 The service temperature is -60-+120%
5.2.4 The temperature under normal resistance is 55~70 (degrees A) 5.2.5 The minimum tear strength under normal temperature shall not be less than MPa. 5.2.6 The minimum batch elongation rate at room temperature shall not be less than 250%. 5.2.7 The hardness change shall not exceed +8°C after air aging test at 120°C × 70h. 5.2.8 The shrinkage permanent deformation rate shall not exceed 35%. 5.2.9 The elasticity change value shall not exceed +5 (A). 5.3 Requirements for the seat
5.3.! The float seat shall be made according to the approved sample and technical documents, and shall not meet the requirements of this standard. 5.3.2 The zinc metallurgy and the surface of the float seat shall not have burrs, sharp angles and obvious concave and convex joints, and the transition shall be smooth. 5.3.3 The tolerance of the same degree of the phase line of the domestic sales face is 0.12mm. 5.4 Dynamic seal assembly requirements || tt || 5.4.1 The difference between the two outer diameters of the dynamic seal rings assembled in pairs should be less than 0.5mm. Pay attention to the centering during assembly. 5.42 Carbon matching is not allowed to be twisted and the contact surface between the 0-shaped ring and the floating seal ring must not be resistant to lubricating oil. 5.4.3 When the outer diameter of the floating seal ring is less than 330mm, the assembly gap between the two floating seal seats is 3mm: when the outer diameter of the floating seal ring is less than or equal to 350mm, the assembly gap between the two dynamic seals is 4mm (reference value). 5.4.4 After assembly, the dynamic seal assembly is not allowed to be uneven or leaking. 5.4.5 The service life of the floating seal assembly should not be less than 5000h 6 Inspection categories
The inspection of floating parts is divided into factory inspection and type inspection. The inspection is in accordance with the provisions of 1B/T8293.2. The inspection of floating parts is to check the color of the oil and the door ring. Before delivery, the factory inspection department shall conduct inspections according to this standard and the requirements of the drawings. After passing the inspection, the parts are allowed to leave the factory and a certificate of conformity is issued: the inspection items are determined by the manufacturer. The inspection method is in accordance with Chapter 3 of 3R 8291.2-1999: Inspection and inspection:
8) Appearance:
b) Surface treatment:
) Dimensions:
d) Geometric accuracy:
e) Physical properties:
Sealing performance.
6.2 Type inspection
JB/T8293.1-1999
New products shall be tested, old products shall be tested, or re-produced after one year of suspension of production. Type inspection shall be conducted by 10 professional and technical personnel and other units in the industry. In addition to the entire type inspection, it also includes: 1) Dynamic sealing performance test;
Reliability life test,
Among them, dynamic sealing performance test and reliability life test shall be conducted on the floating sealing test bench of the industry testing center, and the method shall be in accordance with Chapter 4 and Chapter 5 of IR/T8293.2-1999,? Packaging, transportation and storage
After the floating sealing ring is strictly inspected, the products must be cleaned and wiped with dirt and oil before packaging: the inner packaging material is natural material and paper box, the outer packaging is wooden box or thick cardboard, and the product is accompanied by a certificate of conformity issued by the quality inspection department. The packaging method shall comply with the requirements of Chapter 5, Chapter 6 and Chapter 7 of GB 5947.1999. 7.2 When the product is shipped in its entirety, under normal transportation conditions, the product must not be damaged. The outer surface of the packaging box shall be marked with the following: a) Product name and specifications:
h) Number of items and gross weight:
) Address and Ministry of Industry and Information Code;
name or mark of manufacturer;
e) Factory date and factory number:
"Preserve against moisture", "Handle with care" words or symbols. 7.3 The floating seal of the packaged product shall be kept in a warehouse free of humidities and shall not produce any corrosive substances within one year. 7.40 The marking, packaging, transportation and storage shall comply with the regulations of GB 572-993 Part 2, Part 3, Chapter 4 and Part 5.40. The name, packaging, transportation and storage of the product shall comply with the regulations of GB 572-993 Part 2, Part 3, Chapter 4, Part 5.40. The name, packaging, transportation and storage of the product shall conform to the regulations of GB 572-993 Part 2, Part 3, Chapter 4, Part 5.
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