Some standard content:
IC8 53.100
Machinery Industry Standard of the People's Republic of China
JB/T8293.2—1999
Floating seal
Test methods
Test methods for tloating seals1999-08-06Aibu
National Bureau of Machinery Industry
2000-01-01Implementation
JBrT8293.2—1999
This standard is a revision of "Test methods for floating seals" in B/29-5. Compared with B823-5, the main differences are as follows: Factory test is added, namely Chapter 3 content; Non-key contents in sealing performance and reliability test are simplified: Static sealing test is included During the factory test, the feasibility test time is shortened from 1500 to 10006. The date of implementation is 829395.
This standard was proposed and coordinated by the Engineering Machinery Standardization Technical Committee. The drafting parties of this standard are: Dajin Engineering Machinery Research Institute, Nanjing Machinery Research Institute, Hebei Chonghua Machinery Parts Factory, Jiangsu Damin Machinery Factory, Xuzhou Huajiuyang Dynamic Oil Seal, Xinguan Fuel Metallurgical Factory, Shanghai Pengpu Machinery Seal Parts Factory, and Xuzhou Machinery of the Ministry of Railway Construction. The drafters of this standard are: Li Mingyang, Zi, Hui, Xue Hua, Zhao Xiaoqin, Deng Zengjun, Huang Jieling, Zhou Yiguan, Zhang Jihe. This standard was first issued in January 1989 as GB10914-R9, and the standard number was adjusted to [B/T82-95 in April 1996. ■Scope
Machinery Industry Standard of the People's Republic of China
Floating oil seal
Test method
Testmethodsfarfoatingttal
JH/T:8293.21999bZxz.net
This standard specifies the contents of factory test, dynamic sealing performance test and life test of floating oil seal for process machinery, and the requirements of the Ministry of Industry and Information Technology. and test report,
This standard is used for dynamic seals with dynamic sealing function on the end face of shafts in light machines and other machine drums. 2 Reference standards
The following standards contain clauses: The clauses of this standard are constituted by the use of the same in this standard. When this standard is published, the versions shown are valid. All standards will be revised. The parties using this standard should discuss the possibility of using the following standard for the latest version: (1BT1690—1992
GB:T 1BIB-[994
GBT[95B—19BO
GB/T 4342 .-[991
GB/T 5720-1993
GB/T 6003.1—1997
R#2931—1999
3 Factory test
3.1 The most important requirements for the test
Standardized liquid resistance test method
Metal bottom surface path element avoidance test force method
Shape head and mutual tolerance detection regulations
Metal microscopic hardness test method
Shape rubber seal test method
Wire mesh test box
Floating flow seal
All equipment, instruments, meters and instruments used in the factory test should meet the requirements of measurement accuracy, and have valid inspection certificates. During the test, the equipment and instruments used in the test should be calibrated. The factory test items are static sealing of floating rings, hard gasket sealing surface, appearance and shape, inner diameter and cutting surface, and other Other items are determined by the factory. 3.2 Test items and detection methods
3.2.1 Static tightness test
“Other items: 0-grade card table (or half glass plate), ring, rubber straw, kerosene: yellow, white tissue paper (or chalk shop: wipe the sealing surface of the bucket with a clean cotton cloth, align the bright belt and press it, wipe a circle of butter at the bottom of the small end, as shown in Figure 1, pour in 20 grams of kerosene, observe for 10m, During the test, the ring sealing surface shall not be full of oil or blocked. At least 4 pairs shall be tested each time. It is allowed to add rings during the test. This can be used as a rubber block. See Table 1 for the quality of the mother of the pressure return. Table [Ring quality registration table
Foreign ring outside. mm
National Machinery and Carbon Industry Bureau 1999-08-06 approved>100-200
>200-400
2000-01-91 implementation
JE/T 8293.21999
1-bad: 2-floating seal ring: 3-full call: 4 rubber number potential: 51 draw a platform diagram!
3.2 Inspection tools for sealing surface, quenching surface and appearance: 10-meter mirror
square, use daily measurement to check the cover, no damage, fuzz or scratches: the cover surface shall not have air holes, shrinkage, sinking feeling or point effect pattern; the appearance shall not have right wrinkles, dirt or other obvious defects, 3.2.3 Outer diameter D, inner diameter D, small end diameter D, valley diameter D, middle diameter D, dimension measuring station L. Its: dial indicator or vernier ruler with a graduation value of 0.02mm: method: as shown in Figure 2, evenly measure 3 times, take the limit value, 3.2.4 Total height, convex edge height, dimensional surface height H, middle diameter height R dimension measurement T. Tools: height gauge and vernier ruler with a graduation value of 0.02mm; as shown in Figure 2, measure 3 times, take the limit value, the middle diameter height is generally half of the total height H or connect the sample. 3.2.5 Inspection of torsion and belt flatness
Tools: roughness meter (or rough sample), 500x interference microscope. Method: Use visual comparison to evaluate the roughness values of the relevant parts of the test piece. Use a 500x dry sand microscope to measure the flatness of the belt
3.2.6 Measurement of pin angle and spherical angle 8
1. Tools: 0-level platform, inclinometer, height gauge with a resolution of 0.2mm and vernier ruler. Method: As shown in Figure 3, measure the height L and the corresponding width of 3 points on the 0-level platform, calculate the angle according to formula (1), and take the limit value.
ra la-
Where: L—measurement radius, mm
L—measurement disk width, that is, the difference between the upper and lower radii, mm. Similarly, by applying formula (1), the nut can be measured and the spherical angle value can be calculated, and the limit value can be taken. 3.2.7 Coaxiality 8 Measurement
T Tool: Coaxiality special inspection tool.
Hall: The measurement of the coaxiality value should be carried out according to QB/T1958, measured 3 times, and the limit value is reached. The coaxiality of the floating seal seat is difficult to measure during processing with a special inspection tool.
3.2.81 Surface hardness test
JB/T8293.2—1999
1. Tool: Rockwell gage or gold exhibition micro-Vickers gage. Figure 3
Force method: Divide the lower surface into 1.3 equal parts, measure 3 places, measure 1 point at each place, and take the average value. In order to avoid damaging the surface, it is allowed to use the small end to the surface instead. The beam construction method shall be carried out according to Chapter 3 of GB/1818-1994 or GT4342. 3.2.9 Measurement of the hard layer depth of the surface
T Others: 20 times with 1 micrometer, microhardness tester, grinder: Force method: Cut the test work into slices, grind and etch, and then use a microscope to measure the hard layer depth. 3.2.10 Heart-shaped hardness test mother
1. Others: A flat rubber hardness tester
Upper method: Evenly distribute, test 3 places, and take the average. 3.2.110 Shadow ring inner diameter 0, measuring base
T Others: 5M
Da: As shown in Figure 4, measure the specimen 3 times and take the average value. 3.2.12 Diameter of the ring
1 Information, a vernier ruler with a scale of 0.02mm is provided.
Fa: As shown in Figure 4, measure the specimen 3 times and take the average value: 3.2.130 Mold misalignment measuring plate
1 Tool: This or a microscope,
Fa: As shown in Figure 3, use the specimen to scratch the plate vertically, and measure the average value of the cross-section a at the scratch point, and take the average value, 3. 1. 140 Shape shrinkage test
Others: shrinkage, box, thickness, square: according to GB/T5720-1993 Chapter 9. 3.1.150 Shape oil resistance test
1 Others: constant box, no balance
and reach: according to GB/T1690-1992 Chapter 4. 4 Dynamic sealing performance test
4. 1 Test day
JB/T8293.2-1999
Old nuclear science dynamic oil seal type to specific energy. After the test piece is installed in the test machine, it will run continuously for 100h, the floating ring temperature is not set to 20-30 degrees, and oil leakage and oil seepage are not allowed
4.2 Small source of reason
Dynamic separation sealing performance test and reliability life test are carried out on type 1 or type test bench 1. This test simulates the actual conditions of the track rollers of a crawler type thruster. The load is loaded with code to ensure the sticking force of the sliding sealing surface of the floating seal. The strengthening method adopts the addition of strengthening materials, and the speed of the test piece is raised. The operation is equal to 24 hours. The strengthening ratio is 4-5 times of the actual working conditions. 4.3. Sample requirements
The samples for formal inspection shall comply with the requirements of B23.1-999, and have their own specifications. The factory inspection table shall be correct. Samples shall be randomly taken from the finished products, and at least 20 pairs of corresponding parts shall be guaranteed. Use in pairs, and do not allow for arbitrary replacement: When the outer diameter of the specimen is less than 10mm, the number of specimens for each test shall not be less than 4 pairs; When the outer diameter of the specimen is greater than or equal to 0 inches, the number of specimens for each test shall not be less than 2 pairs. 4.4 Test equipment
or inspection equipment is a type 1 test bench (see Figure 6) and a type Ⅱ or inspection piece (see Figure 7). The type Ⅱ test bench consists of 4 test machines: 4 pairs of test blocks within 2mm can be counted at a time, and the test piece speed is 260-300r/min; : Type Ⅱ test bench consists of 2 types of verification machines, which can simultaneously test 200-aamm specimens, and the test piece speed is -1T/mi4.5T tools and materials
workers provide: flat diameter, rotary table, semiconductor point thermometer, screwdriver, alarm hand, etc. Materials: coal sleeves, engine oil, etc.
1.6 Test flow
The sample is loaded into the test machine according to the requirements of the floating package, and the pressure of the cover is guaranteed to be between 390-690kPa for 100h, and the record is recorded in Table 2, JBT82933-1999
1-.-Real machine: 2-Rotating shaft:
3-Drive shaft: 4-V belt: 5 Test machine, center. Loading code 6
4-V belt: 5 Drive shaft: 6-Test machine:
1-Drive: 3-link cat me, reverse machine;
Sample number,
Book factory
Feasibility life test
5. 1 Test purpose
JB/T8293.2—1999
Table 2 Dynamic reliability and life test span of floating seal Test code:
Test location:
Test height
Test oil flow
Test seat
Civil source
Additional quantity
Test standard:
Test person:
Change speed
Test time
During continuous 1UU6 operation, no paint leakage is allowed, so as to assess the serviceability of the floating seal in the reinforcement part, control its internal movement speed, and estimate its service life. 5.2 Principle of the method Same as 4.2, 5.3 Test requirements 5.4 Test equipment 5.5 1. Other materials Same as 4.5. Samples: coal pool, engine oil, sand, clay and water in accordance with B6003.1+W0500.100-SSW0.12S.050 (10120) specification. 5.6 Test method After the dynamic sealing performance test of the sample, add 60% of sand and 40% of clay mixed with water into the test machine and run for nearly 1000 hours before disassembly. Check the sealing surface and shape of the floating seal and the tensile strength, and summarize the data in Table 2. The test report shall include the following contents: a) product name and specification; b) manufacturing and publication date; e) name and number of the standard on which the test is based; d) test location and test group members; e) test environment temperature; d) test date; 3) test results and conclusions; 4) necessary comments; JB/T8293.2—1999
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