This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of small and medium power internal combustion engine oil tanks. This standard is applicable to small and medium power internal combustion engine oil tanks. JB/T 5079-1991 Technical requirements for small and medium power internal combustion engine oil tanks JB/T5079-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5079—91
Technical Conditions for Oil Tanks of Small and Medium Power Internal Combustion Engines
Published on July 1, 1991
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Implemented on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Technical Conditions for Oil Tanks of Small and Medium Power Internal Combustion Engines
Subject Content and Scope of Application
JB/T5079—91
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and fixed storage of oil tanks of small and medium power internal combustion engines. This standard applies to oil tanks of small and medium power internal combustion engines (hereinafter referred to as oil tanks). Cited standards
GB1922
GB2828
GB3821
GB6004
GB9286
JB4129
3 Technical requirements
High-quality carbon cable structural steel plates and strips
Solvent oil
Counting sampling procedures and sampling tables for batch inspection (applicable to inspection of continuous batches) Cleanliness determination method for small and medium-power internal combustion engines Test sieves Wire woven square hole sieves
Scratch test for paint and varnish films
Burr height of stamping parts
3.1 The fuel tank shall comply with the requirements of this standard and be manufactured according to the product circle samples and technical documents approved through the prescribed procedures. 3.2 The material of the fuel tank body and the fuel filler port shall be high-quality carbon cable structural steel thin plates and shall comply with the provisions of GB710. 3.3 The stamping parts of the fuel tank should be flat, and no defects such as cracks and wrinkles are allowed. The burr height should comply with the provisions of JB4129. 3.4 The connection between the oil outlet socket and the lower body of the fuel tank should be firm and reliable: it should be able to withstand a torque greater than or equal to 19N·m when connected externally; it is not allowed to be loose when connected internally.
3.5 The weld of the filter box should be firmly scraped and smooth, and no defects such as cracks, melt-through, pores, and clamping are allowed. Welding slag and spatter should be removed after welding. 3.6 Before painting, the inner and outer surfaces of the fuel tank must be treated with rust prevention. 3.7
The quality of the lacquer coating on the outer surface of the fuel tank should comply with (regulations, Table 1
External gram of the film
Thickness of the film
Adhesion of the film
Smooth and flat, uniform in color, and without obvious paint defects.>25 um
Not less than level 2
3.8 The transition layer of zinc and chrome-plated parts of the fuel tank should be evenly hooked and firm, and no defects such as residue and bubbles are allowed. 3.9 The inside of the fuel tank should be clean, and its cleanliness should comply with the provisions of Table 2. Table 2
Capacity of fuel tank
Approved by the Ministry of Machinery and Electronics Industry on July 1, 1991
Cleanliness limit mg/L
Implemented on July 1, 1992
310 The fuel tank should be tested for sealing, and no leakage is allowed, JB/T 507991
3.11 After the vibration durability test, the oil tank should be subjected to a sealing test. No leakage is allowed, and its parts are not allowed to be damaged. 3.12 The outer surface of the oil tank should be flat and smooth, and no obvious pits, dents, scratches or other defects are allowed. 4 Test method
4.1 Sealing test
The oil tank with the filling port and other parts sealed is completely immersed in water, and compressed air with a pressure of 50kPa is introduced for 1 minute. No leakage is allowed.
4.2 Vibration durability testwww.bzxz.net
Fill the oil tank with two-thirds of its volume with water, fix it on the vibration test bench, and test it according to Table 3 The specified test specifications shall be followed for dynamic endurance test. After the test, the fuel tank shall be tested for sealing, and no leakage is allowed. The parts shall also be checked, and no damage is allowed. Table 3
Dynamic acceleration
5 Inspection rules
5.1 Inspection classification
5.1.1 Factory inspection;
5.1.2 Type inspection.
5.2 Inspection items
5.2.1 Factory inspection
Sealing test:
Assembly dimensions:
Quality of the outer surface of the fuel tank:
Packaging quality,
5.2 .2 Type inspection
Includes factory inspection and the following items:
Fingering frequency
Firmness of connection between the oil outlet connector and the oil tank body; Oil tank internal cleanliness:
Appearance quality of paint film:
Paint film thickness:
Motion film pulling force:
Vibration endurance test,
5.3 Inspection method
5.3.1 Sealing test and vibration endurance test shall be in accordance with 4.1 and 4.2. F
5.3.2 The firmness of connection between the oil outlet connector and the oil tank body shall be inspected with a force measuring wrench, 5.3.3 Inspection method for oil tank cleanliness According to the provisions of Appendix A (supplement). 5.3.4 The assembly dimensions shall be inspected by comprehensive inspection tools. 5.3.5 The inspection methods for paint film thickness and adhesion shall be in accordance with the provisions of GB9286. 5.3.6 The external surface quality, quick film appearance quality and packaging quality of the fuel tank shall be visually inspected. 5.4 Acceptance rules
5.4.1 Each fuel tank shall be inspected by the inspection department according to the factory inspection items and shall be shipped only after passing the inspection. 2
Test time h
JB/T507991
5.4.2 The fuel tanks shall be delivered in batches for acceptance. When the ordering unit samples the product quality, it shall be carried out in accordance with the provisions of GB2828, or agreed upon by the supply and demand parties. 6 Marking, packaging, transportation and storage
6.1 Marking
The outer surface of each fuel tank should be marked with:
Manufacturer name or factory mark:
Product name and model; the outer surface of the packaging box should be marked with:
Manufacturer name:
Product name and model. 1
Total weight and quantity:
Dimensions: t×bXh.mm;
Delivery address Tax and shipping unit:
"Handle with care", "Moisture-proof", "Pressure-proof" and other words or signs, year and month of manufacture
6.2 Packaging
6.2.1 Each inquiry box should be accompanied by the manufacturer's inspection certificate when it is packed into the packaging box. 6.2.2 The oil tank should be cushioned with protective material when it is packed into the packaging box. The packaging box should be fastened with packaging tape. 6.3 Transportation
The total weight of each packaging box should not exceed 50kg, and it should be ensured that it will not be damaged during normal transportation. 6.4 Some oil tanks stored in the packaging box should be stored in a ventilated and dry warehouse. Under normal storage conditions, the oil tank should be kept in a safe place. The device will not rust within 12 months from the date of export.
A1 Preparation
JB/T5079—91
Appendix A
Method for determination of cleanliness of fuel tanks for small and medium-power internal combustion engines (supplement)
A1.1 The inspectors should master this method for determination of cleanliness. A1.2 The inspectors should wear clean long-fiber work clothes and a cold-weather work coat made of long-fiber fabrics. The hair should not be exposed outside the clothes. The inspectors should wash their hands.
A1.3 All surfaces of the fuel tank in contact with the fuel should be selected as the sampling surface for determination of cleanliness as specified. A1.4 Place the fuel tank on the workbench and wipe the outer surface. A1.5 The cleanliness determination work should be carried out in a clean, well-ventilated room with safety measures. A2 Cleaning
A2.1 The operation should be consistent during the cleaning process so that the results have good repeatability. A2.2 Instruments, equipment and cleaning fluid
A2.2.1 White nylon drawing brushes and facial pens of various sizes. A2.2.2 Syringes or spray bottles.
A2.2.3 White porcelain and white porcelain shop with lids.
A2.2.4 Stainless steel jars with flat ends and no teeth A2.2.5 Analytical instruments with a sensitivity of one ten-thousandth of a gram. A2.2.6 Vacuum pump (vacuum degree less than 399.99Pa) and membrane filtration device, which should comply with the provisions of GB3821. A2.2.7 Oven, drying dish, and weighing bottle. A2.2.8 The sliding liquid is NY-120 solvent oil, according to GB192 2. The amount should be enough to wash all the sample surfaces. The clean steam zone is filtered through a 5um microporous filter membrane.
A2.3 Cleaning method
A2.3.1 Add enough cleaning liquid to the fuel tank, install the fuel tank cap, and seal the other holes of the fuel tank. The rain machine should use manual methods to clean all the sampling surfaces and clean them at least twice. A2.3.2 Use clean cleaning liquid to clean various brushes and the inner wall of the container. A2.3.3 Use the cleaning liquid specified in A2.2.8 to clean the fuel tank, and collect the turbid liquid after cleaning in a container with a lid. The container should be numbered.
A2.3.4 Filter
A2.3.4.1 The filter is a 38um steel wire or copper wire filter. According to GB6004. A2.3.4.2 Place the filter flat in a container filled with cleaning liquid, move it up and down to clean both sides, remove the filter after cleaning, wait for the liquid to pass through, and put it in a 105±5°C oven to dry. After 60 mm, take out the filter, place it in a dry dish and cool for 3 minutes. Take it out and weigh it. The above drying, cooling and weighing process should be repeated until the difference between the weights of the filter twice in a row is less than or equal to 0.1g. The last filter should be numbered, its weight recorded, and reserved.
A2.3.4.3 Put the spare filter into the membrane filtration device. Start the vacuum pump to make the turbid liquid evenly and continuously enter the filter for filtration. After the filter is completed, gently use a fork to take out the filter with impurities from the membrane device, and then put it into a numbered weighing bottle with a lid. A3 Drying and weighing
A3.1 Place the weighing bottle with the filter in a drying oven at 105±5°C, open the bottle slightly and dry it for 60 minutes. A3.2 Cover the weighing bottle and cool it in a drying chamber for 30 minutes4
JB/T5079—91
A3.3 Take out the filter from the weighing bottle and weigh it with an analytical balance with a sensitivity of one ten-thousandth of a gram, accurate to 0.1 mg: record the weight, A3.4 Calculate the impurity mass according to formula (A1):
Where: m-impurity weight mgi
mt-weight of the filter before filtration, mg:
m——weight of the filter after filtration, mg.
Additional remarks:
This standard is proposed and managed by the Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by the Shanghai Internal Combustion Engine Research Institute of the Ministry of Machinery and Electronics Industry. The main drafters of this standard are Meng Shizhong and Zhu Xinsen. (A1)
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