JB/T 9767-1999 This standard is a revision of ZB J92 010-89 "Technical Conditions for Steel Belt Combined Oil Rings for Internal Combustion Engines". During the revision, only editorial changes were made in accordance with relevant regulations, and the main technical content remained unchanged. This standard specifies the terms, symbols, codes, technical requirements, inspection methods, inspection rules and marking, packaging, transportation and storage of steel belt combined oil rings for internal combustion engines. This standard is applicable to steel belt combined oil rings for reciprocating internal combustion engines with a cylinder diameter of less than or equal to 200mm. This standard was first issued in 1989. JB/T 9767-1999 Technical Conditions for Steel Belt Combined Oil Rings for Internal Combustion Engines JB/T9767-1999 Standard download decompression password: www.bzxz.net

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Machinery Industry Standard of the People's Republic of China
JB/T 9767—1999
Internal combustion engines
Expander/segmentQil control steel ringsSpecifications1999-09-17 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
TB/T9767—1999
This standard is an editorial revision of ZBJ92010—B9 Internal tower crane steel belt combined oil ring according to technical conditions 3. The main technical content has not changed. This standard replaces 2BJ92010—89 from the date of implementation. This standard is proposed and approved by the National Technical Committee for Standardization of Internal Combustion Engines. The drafting unit of this standard: Shanghai Internal Combustion Engine Research Institute. The main drafter of this standard: Su Qinghua.
This standard was first issued on May 13, 1989. Scope
Machinery Industry Standard of the People's Republic of China
Internal combustion engine steel belt combination oil ring
Technical conditions
Internal combustion engine steel belt combination oil ringSpecificationsJB/I9767—1999
This standard specifies the specifications, symbols, codes, technical requirements, inspection methods, inspection rules and marking packaging, freight rate and storage of internal combustion engine steel belt combination oil rings.
This standard is mainly applicable to reciprocating inner end machine steel belt combination oil rings (hereinafter referred to as rings) with a cylinder diameter of less than or equal to 300m. 2. Referenced standards
The texts contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all in effect. All standards are subject to revision. Parties using this standard should explore the possibility of adopting the latest versions of the following standards: GB/T 224—1987
GB/T699--1999
GB:T 1[49.1—1994
GB/T 1[49.2—[994
GB1149.4—1994
GA/T11496—1994
G/T1149.7—1994
GH/T1220—1992
GD/T 1222--1984
GD/T 1298--1986
GB/T 2828—19B7
GB/T 434—1984
GH/4342—1991
3. Terms, symbols and codes
Method for determining the decarburization depth of steel
High-quality carbon structural steel
General planning for piston rings of internal combustion engines
Terminology for piston rings of internal combustion engines
Technical requirements for piston rings of internal combustion engines
Inspection methods for piston rings of internal combustion engines
Stainless steel
Tan Zan Zhao
Carbon inspection, tool steel technical spare parts
Remote batch inspection counting sample sequence and sampling table (applicable to reverse batch inspection) Jinwang Vickers hardness test method
Jinzhan micro Vickers hardness test method
1 Names of various parts of the ring, see use! .
Guohao Machinery Industry Bureau approved on September 17, 1999, implemented on January 1, 2000
3.2 Ring gauge
JBT9767-
Ring gauge with
Ring gauge with inner diameter equal to the basic diameter of cylinder (). 3.3 Base surface
The plane on which the bearing is placed during measurement, except for special provisions. 3.4 Definition and code of performance terms
3. 4. 1 Tangential elastic force F,
red and combined with
ring
control swing cover
thick seat,
combined with
steel belt or iron clad ring, tangential force at the open end to tighten the ring to keep the ring closed, the flat end of the ring should be perturbed
3.4.2 Specific pressure shop
slowly lost the outer surface of the ring and the cylinder wall are completely in contact, the average pressure acting on the cylinder per unit pole is calculated by formula (1): 2F
where: Po-
P average pressure, MPa
tangential elastic force, N;
T. The contact height between the outer surface of the ring and the cylinder wall is equal to the product of the number of scrapers and the height of the scrapers, mm: d,—ring diameter. mm.
3.4.3 Thermal stability
After the ring is installed in a ring gauge and kept at a specified temperature for a certain period of time, its elastic force disappearance rate, 3.4.4 Light tightness
When the ring is installed in a ring gauge and irradiated with light with specific requirements, the degree of tightness of the outer surface of the ring and the inner surface of the ring gauge to light: 3.4.5 Unannotated symbols and codes
The terms, symbols and codes not specified in this standard shall comply with the provisions of GB/T1149.1, GB/T1149.2, GB/T1149.4 and GB/T1149.6.
4 Technical requirements
The products shall be manufactured according to the product drawings and technical specifications approved by the prescribed procedures. 4.1 Materials
JR/T9767-1999
The materials shall be 65, 70, 75, 65Mn70Mm steels specified in GB/T699-1999, TA, T8MnA, T9A steels specified in GB/T1298-1986, elastic steel specified in GB/T1222 and stainless steel specified in 0B/T1220. 4.2 Metallographic structure
4.7.1 The annealed and tempered ring shall be finely annealed martensite or tempered troostite, and a small amount of troostite and troostite carbides shall be allowed.
4.2.2 There should be no complete decarburization layer on the ring surface. The elasticity of the partial decarburization layer should be less than or equal to 0.025mm or as specified in the product drawing. 4.3 Hardness
4.3.1 After annealing, the hardness of the rings treated with the same annealing is 400-530HV. The hardness difference on the same ring should be less than or equal to 4DHV units: 4.3.2 The hardness of the cold-rolled material ring is greater than or equal to 367HV, or as specified in the product drawing. 4.3.3 Stainless steel rings shall be as specified in the product drawings.
4. 4 Thermal stability
After the rings are installed in the ring gauge and kept at 220±0℃ for 5 days, the elastic force disappearance rate is: heat-resistant key ring: 15%;
non-heat-resistant steel ring: 30%
4.5 Surface coating and surface treatment
4.5.1 The outer cylindrical surface of the scraper shall be chrome-plated, and the chrome thickness shall be as specified in the product drawings; the hardness of the chrome layer shall be greater than or equal to: 800HVal; the chrome plating layer shall be firmly bonded to the substrate.
4.5.2 The stainless steel surface of the ring shall be oxidized or crushed, and the total thickness of the two surface layers shall be 0.002~0.006mm, with uniform color, dark blue or black.
4.5.3 The surface of the steel ring should be smooth. 4.5.4 Other surface coatings or surface treatments should comply with the specifications of the product drawings. 4.6 Elastic modulus
The elastic modulus E of the mold is 200GPa
4.7 Tangential elastic force tolerance
The tolerance of the tangential force is ±20% of the original elastic force. 4.8 Axial length tolerance
4.8.1 The tolerance of the scraper height is 0.04mm. When the outer surface is chrome plated, it is allowed to increase by 0.04mm, and the inner surface is allowed to increase by 0.015mm. When the inner surface is chrome forged, it should comply with the product drawing requirements. 4.8.2 The tolerance of the radial contact and radial contact is 0.20mm. 4.8.3 The axial wave height of the base support and auxiliary ring is 0.10mm, and it is allowed that less than 10% of the wave peaks are lower than the lower limit of 0.05mm. 4.9 Radial thickness tolerance 4.9.1 The tolerance of the radial thickness of the scraper is 0.06mm: the radial thickness difference on the same piece ring is less than or equal to 0.06mm. 4.9.2 The steel thickness tolerance of the radial support is 0.04mm. 4.9.3 The limit deviation of the radial size of the composite bearing and axial bushing is ±0.10mm. 4.9.4 The tolerance of the combined radial thickness gauge is 0.50mm. 4.10 Closing gap limit
JB/T9767—1999
4.10.1 The tolerance of the scraper closing gap S is 0.5mL24.10.2 When the multi-angle radial mixing machine is installed on the mandrel with the same outer diameter as the bottom diameter of the ring and the same inner diameter as the average inner diameter of the scraper, the total gap should comply with the product drawing. 4. Surface shape tolerance
4.11.1 The circumferential flatness and radial flatness of the scraper are 0.05mm4. 11. 2 The warpage of the scraper is 3 mm
4.11.3 The circumferential flatness and radial flatness of the double-lift boss and the axial sealing ring are 0.05mm. Special requirements are specified in the product sample 4.12 Light sealing
After the non-oxygenated oil ring is known, the outer mesh surface of the scraper and the inner valve surface of the ring gauge should be sealed and no light leakage is allowed. Special requirements are negotiated and agreed by both supply and demand.
d.13 Final surface processing
4.13, 1 The processing of the chrome-plated surface of the scraper outer surface meets the requirements of the product drawing. 4.13.2 Other rolled surfaces can be processed without cutting and T. 4.13.3 The surface roughness shall meet the requirements of product sample cutting. 4.14 Scraper chamfer
The outer mesh surface of the scraper opening shall have a chamfer of 0.2×45°-0.4×45° or a chamfer of 0.2×45° or a chamfer of 0.4×45°. 4.15 Fastening
4.15.1 The surface shall not have cracks, roughness, rust, damage, indentation or scratches. 4.15.2 The grinding surface shall be smooth and shall not have visible bubbles, debonding, chrome particles, dents, cracks or scratches. Pinholes with a diameter of 0.2mm and a minimum spacing of 2.5mm are allowed on the surface. When the ring diameter is less than or equal to 100mm, 4 pinholes are allowed on the outer surface and edges respectively. When the ring diameter is greater than 100mm, 6 pinholes are allowed on each side. 4.16 Rings shall not have residual magnetism.
4.17 Special requirements
Special requirements shall be implemented in accordance with the regulations of the competent department. 4.1 Warranty period
The warranty period of the sealing ring shall be implemented in accordance with the regulations of the competent department. Under normal use by the user, if the sealing ring is damaged due to manufacturing quality during the warranty period, the manufacturer shall be responsible for replacement.
5 Magnetic inspection method
5.1 The radial flatness and circumferential flatness of the side of each supporting convex and axial sealing ring shall be installed according to the method shown in Figure 2 and inspected according to the method specified in 3.2.18 of GB149.6[994. However, the load value at each point is taken as 1N. 5.2 Test of bonding strength between the chromium layer and the substrate. Clamp the two ends of the scraper with a round end with a radius of 3. Bend the scraper 90° at the offset, and then bend it 180° in the opposite direction. Check whether there is any shedding between the chromium layer and the substrate at the bending. Separation only at the interface between the chromium layer and the substrate is considered shedding. Separation without separation at the interface should not be considered shedding. 5.3 Inspection methods not mentioned in this standard shall be inspected in accordance with the provisions of GB/T1149.1, GB/T1149.4, GB/T1149.6, GB/T224, GB/T4340 and GB/T4342.
Inspection regulations
JB/T9767-1999
When the ordering unit inspects the production station, it shall be carried out in accordance with the provisions of GBT282. The qualified quality level AQ1 value and sampling plan shall be determined by the competent department or agreed upon by the exporting party.
7 Marking, packaging, transportation and storage
7.1 The oil ring with key combination should be packaged together with the gas ring of the same model, specification and group, unless there are special requirements. 7.2 The inner ring mentioned at the end of this chapter shall comply with the provisions of GB1149.1.
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