JB/T 51123-1999 Internal Combustion Engine Centrifugal Oil Filter Product Quality Classification JB/T51123-1999 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T51123-1999
Internal Combustion Engine Centrifugal Oil Filter
Product Quality Classification
(Internal Use)
Published on 1999-12-30
National Machinery Industry Bureau
Implemented on 2000-06-01
JB/T51123-1999
This standard is a revision of JB/T51123.1~51123.3-94 "Internal Combustion Engine Centrifugal Oil Filter Product Quality Classification". During the revision, editorial changes were made to the original standard, and the main technical content remained unchanged. This standard replaces JB/T51123.1~51123.3-94 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Internal Combustion Engines. The drafting unit of this standard is Shanghai Internal Combustion Engine Research Institute. The main drafters of this standard are Meng Shizhong and Yuan Dexian. This standard was first issued in 1991.
1 Scope
Mechanical Industry Standard of the People's Republic of China
Internal Combustion Engine Centrifugal Oil Filter
Product Quality Grading
(Internal Use)
JB/T51123—1999
Replaces JB/T51123.1-51123.3—94
This standard specifies the quality indicators, test methods and inspection rules for the three grades of qualified products, first-class products and superior products of hydraulically driven centrifugal oil filters for 22~735kW internal combustion engines. This standard applies to the inspection and evaluation of the quality of internal combustion engine centrifugal oil filters. 2 Reference Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2828——1987
GB/T3821—1983
JB/T5099—1991
JB/T6019—1992
JB/T8124—1999
3 Quality indicators
Technical requirements
Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) Small and medium-power internal combustion engines: cleanliness determination method Internal combustion engine paper filter element oil filter assembly test method
Technical conditions for split flow centrifugal oil filters Internal combustion engine centrifugal oil filter test method 3.1.1 Centrifugal oil filters (hereinafter referred to as filters) shall be manufactured in accordance with product drawings and technical documents approved through prescribed procedures. 3.1.2 Filter products are classified into three grades according to their different quality indicators: qualified products, first-class products and superior products. 3.1.3 Requirements for filter product quality classification indicators 3.1.3.1 Test medium The filter shall be tested for performance according to the provisions of 6.6.3 in JB/T5099-1991. Under the pressure specified in Table 1, its performance indicators shall meet the following requirements:
a) The speed shall meet the requirements in Table 1.
Oil inlet pressure iPa
Approved by the State Machinery Industry Bureau on December 30, 1999 Output pressure kPa
Qualified products
≥5500
≥5000
≥5500
First-class products
≥5750
≥5250
≥5 250
≥5750
Superior product
≥6000
≥6000
≥5500
≥6000
2000-06-01 implementation
JB/T51123-1999
b) Under the pressure specified in Table 1, the driving volume flow rate shall comply with the provisions of Table 2. Table 2
Qualified product
≤155
≤135
Superior product
c) Under the pressure specified in Table 1, the output volume flow rate of full-flow centrifugal oil filter OL115 shall be greater than or equal to 20L/min for qualified products, greater than or equal to 21L/min for first-class products, and greater than or equal to 22L/min for superior products. 3.1.3.2 Use clean mineral oil with a kinematic viscosity of 19±1 mm/s as the test medium. For split-flow centrifugal oil filters, apply an oil inlet pressure twice that specified in Table 1 for 5 minutes; for full-flow centrifugal oil filters, apply an oil inlet pressure of 800 kPa and an output pressure of 300 kPa for 5 minutes. The filter shall not leak. The inside of the filter shall be clean, and its cleanliness shall comply with the requirements of Table 3.3.1.3.3
3.1. 3.11
Qualified products
Superior products
Apply pressure according to the provisions of 3.1.3.2, and the filter shall operate for 10 minutes. The rotor assembly shall not break and all parts shall not be damaged. The opening pressure of the pressure limiting valve is 150-200 kPa. The opening pressure of the safety valve shall be as specified in the product drawing. The opening pressure of the pressure regulating valve shall be as specified in the product drawing. When the filter is tilted 30 degrees to the left and right, the speed drop shall not exceed 10% of the value specified in 3.1.3.1a). Steel parts shall be treated with rust prevention, and the galvanized layer of exposed parts shall not peel and the paint layer shall not fall off. There shall be no obvious appearance quality defects such as bruises, scratches, burrs, etc. The surface quality of die castings shall be in accordance with the product drawings. The packaging quality shall comply with the provisions of JB/T6019. According to the principle of equal or close working volume, the product quality classification of special type filters shall refer to the quality indicators of the corresponding type filters of this standard.
4 Test method
4.1 General
4.1.1 Product quality indicators shall be in accordance with the provisions of Chapter 3. 2
JB/T51123-1999
4.1.2 Product quality inspection contents include bench performance test, cleanliness test, assembly sealing, pressure resistance, opening pressure, appearance and packaging quality.
4.1.3 Sample extraction method and quantity shall be in accordance with the provisions of Chapter 5. 4.1.4 Sample test results shall be evaluated in accordance with Chapter 5. 4.2 Inspection method
4.2.1 The five performance quality indicators of the filter, namely, hydraulic characteristics and speed characteristics, opening pressure of the pressure limiting valve, speed characteristics under tilted state, assembly sealing and rotor assembly pressure resistance, shall be inspected in accordance with the provisions of JB/T8124. 4.2.2 The inspection method of the opening pressure of the filter safety valve and pressure regulating valve shall be in accordance with the provisions of JB/T5099. 4.2.3 The inspection method of the internal cleanliness of the filter shall be in accordance with the provisions of GB/T3821. 4.2.4 The packaging quality of the filter shall comply with the provisions of JB/T6019. 4.2.5 The surface quality of the filter die casting shall be inspected according to the technical requirements of the product drawings. 4.2.6
The paint quality, bump damage and anti-rust quality of the filter anti-rust parts shall be inspected by self-test. 5 Inspection rules
Quality grading index
The grading index of product quality shall comply with the provisions of Chapter 3. 5.2 Test method
The test method shall comply with the provisions of Chapter 4.
5.3 Sampling inspection rules and sampling plan
Sampling inspection rules and sampling plan shall comply with the provisions of GB/T2828. 5.3.1 Unqualified classification
The quality characteristics of the inspected products that do not meet the standards and product drawings are called unqualified. According to the degree of influence of each type of unqualified on the use of the product, it is divided into Class A unqualified, Class B unqualified and Class C unqualified. The classification of unqualified centrifugal oil filter products is shown in Table 4. 5.3.2 Qualified quality level AQL
Centrifugal oil filter products are divided into three levels of AQL values ​​according to qualified products, first-class products and superior products, see Table 5 and Table 6. 5.3.3 Inspection batch
The inspection batch N is specified to be 2650. The inspection batch shall not be less than the lower limit of the specified batch range. If it is greater than the upper limit of the specified batch range, the products shall be divided into several batches of 26 to 50, and one batch shall be randomly selected for sampling inspection. 5.3.4 Inspection level
For Class A unqualified products, the general inspection level I is adopted, and its sample size code is C, and n is 5. For Class B unqualified products and Class C unqualified products, the general inspection level II is adopted, and its sample size code is D, and n is 8. 5.3.5 Sampling method
A normal inspection sampling plan is adopted.
5.3.6 Sampling plan
The sampling plan for centrifugal oil filter products is shown in Table 5 and Table 6. 5.4 Implementation of the sampling plan
JB/T51123-1999
The inspection samples should be drawn from the user unit or commercial department, and are not subject to the lower limit of the batch range. If there is no stock at the above location, with the consent of the relevant departments, samples can be drawn from the production line of the production plant or from the products that have been put into storage recently (within half a year). At this time, 5.3.3. The batch range specified in the regulations. When sampling, the randomness of sample selection should be ensured. Table 4 Quality characteristics of centrifugal oil filter products Unqualified classification Unqualified classification
Quality characteristics
Drive volume flow
Output volume flow
Filter assembly sealing
Filter assembly internal cleanliness
Rotor assembly pressure resistance
Safety valve opening pressure
Pressure limiting valve opening pressure
Pressure regulating valve opening pressure
Speed ​​when the filter is tilted at 30°
Rust prevention quality
Paint quality
Packaging quality
Exposed die casting surface quality
Sulfur bruises
Note: Those with symbols are items to be tested
Table 5 Sampling judgment plan for split flow centrifugal oil filter products Unqualified classification
Inspection level
Sample size code
Number of samples n
Qualified products
First-class products
Superior products
Ac, Re
Batch N26~50
JB/T51123—1999
Table 6 Sampling judgment plan for full-flow centrifugal oil filter products Unqualified classification
Inspection levelwwW.bzxz.Net
Sample size Code
Number of samples
Qualified products
Ac, Re
First-class products
Superior products
5.5 Product quality grade assessment
5.5.1 Sample inspection
Batch N26-50
Samples should be inspected according to the unqualified classification specified in Table 4 and the sampling plan specified in Table 5 and Table 6, and in accordance with the provisions of Chapter 3 and Chapter 4.
5.5.2 Determination of batches
After all samples are inspected, if the number of unqualified products in a certain category is less than or equal to the Ac value, the category is judged as qualified. When the number of unqualified products in a certain category is greater than or equal to the Re value, the category is judged as unqualified. When all categories are judged as qualified, the entire batch of products can be finally judged as qualified. 5.5.3 Quality Grade Assessment
5.5.3.1 After all samples have been inspected, when the number of unqualified products of each category in the sample is less than or equal to the Ac value of the superior product, the inspected product shall be assessed as a superior product: if the number of unqualified products of each category in the sample is less than or equal to the Ac value of the first-class product, the inspected product shall be assessed as a first-class product; if the number of unqualified products of each category in the sample is less than or equal to the Ac value of the qualified product, the inspected product shall be assessed as a qualified product. If the number of unqualified products of one or more categories in the sample is greater than or equal to the Re value of the qualified product, the inspected product shall be assessed as an unqualified product. 5.5.3.2 If a product is assessed as an unqualified product, it is allowed to be re-inspected once after half a year. If the re-inspection is qualified, it can still be assessed as a qualified product, but it shall not be assessed as a first-class product or a superior product.
Mechanical Industry Standard
Internal Combustion Engine Centrifugal Oil Filter
Product Quality Classification
(Internal Use)
JB/T51123-1999
Published and Distributed by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing, Postal Code 100044)*
Format 880X 1230
1/16 Printing sheet 1/2
2 Word count 12000
First edition in February 2000
Print run 1-500
First printing in February 2000
Price 1000 yuan
99-1243
Mechanical Industry Standard Service Network: http/kvwwJB.ac.cn6661 /
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