JB/T 51175-2000 Fuel injection pump test bench product quality classification JB/T51175-2000 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T51175-2000
Fuel Injection Pump Test Bench
Product Quality Grading
(Internal Use)
Published on 2000-03-30
National Machinery Industry Bureau
Implemented on 2000-10-01
JB/T51175-2000
This standard is based on JB/T97 Based on GB/T14096-1999 "Technical Conditions for Fuel Injection Pump Test Bench" and GB/T14096-1993 "Test Methods for Fuel Injection Pump Test Bench", this standard amends JB/T51175.194 "Quality Indicators for Fuel Injection Pump Test Bench Product Quality Grading Standard", JB/T51175.2-94 "Test Methods for Fuel Injection Pump Test Bench Product Quality Grading Standard", and JB/T51175.3-94 "Inspection Rules for Fuel Injection Pump Test Bench Product Quality Grading Standard". During the revision, the contents that have been proven to be suitable for national conditions and objectively reflect the quality level of products have been retained, and the explanatory contents of sampling inspection and quality grade assessment have been added. In accordance with the provisions of relevant documents, the three separate standards have been merged into one standard and editorial modifications have been made.
Compared with JB/T51175.1~51175.394, the main technical content of this standard has been changed as follows: the two non-inspectable items of coupling stiffness and fuel injection pump installation stability have been cancelled. Because its influence on the test bench can be controlled by the detection of several other dynamic properties. For example, the stiffness of the coupling can be guaranteed by the detection of angular displacement; - the relative angular displacement requirements are added, and it is classified as Class C in Table 13; - the requirements for the neutrality of the fuel injection pump installation are modified to be consistent with JB/T9734: - the test bench repeatability requirements are added according to JB/T9734, and it is classified as Class A in Table 13; - the flow requirements and flow test methods of the standard fuel injector assembly on the test bench are added: - the load pump parameters in Table 9 are modified according to the provisions of JB/T9734 to be consistent with it. Appendix A of this standard is the appendix of the standard.
This standard replaces JB/T51175.1-51175.394 from the date of implementation. This standard is proposed and managed by the Technical Committee for Standardization of Fuel Pumps and Nozzles. The drafting unit of this standard: Wuxi Fuel Pump and Nozzle Research Institute. The main drafters of this standard: Zhu Xifen, Xu Nianbao, Chen Guoqiang. This standard was first issued in 1987, and the standard number was adjusted to JB/T51175.1~51175.394 in 1994.1
1Scope
Mechanical Industry Standard of the People's Republic of China
Fuel Injection Pump Test Bench
Product Quality Grading
(Internal Use)
JB/T51175-2000
Replaces JB/T51175.1-51175.3-94
This standard specifies the grading indicators, inspection methods, sampling inspection and grade assessment rules for the product quality of fuel injection pump test benches (hereinafter referred to as test benches).
This standard is applicable to the quality grade inspection and assessment of fuel injection pump test benches used for routine verification of fuel injection pump assemblies for medium and high-speed diesel engines.
2 Referenced Standards
The following standards contain provisions that 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 252-1994
GB/T28281987
GB/T3821—1983
GB/T8029——1987
GB/T140961993
JB/T7661—1995
JB/T8121—1999
JB/T9733—1999
JB/T97341999
JB/T97351999
3 Quality indicators
Light diesel oil
Batch inspection counting sampling procedures and sampling tables (applicable to continuous batch inspection) Methods for determination of cleanliness of small and medium-power internal combustion engines Diesel engine fuel injection pump calibration oil
Fuel injection pump test bench test method
Diesel engine fuel pump nozzle product cleanliness limit and determination method High-pressure oil pipe assembly for diesel engine fuel injection pump test bench Standard fuel injection pump technical conditions
Fuel injection pump test bench technical conditions
Standard fuel injector assembly for fuel injection pump test bench, technical conditions 3.1 The test bench shall be manufactured according to the product drawings and technical documents approved by the prescribed procedures, and shall comply with the requirements of JB/T9734 and this standard. The terms shall be in accordance with the provisions of JB/T9734.
3.2 Stable load speed fluctuation
Under the conditions of stable permissible load and stable power supply, the speed fluctuation rate of the drive shaft within 1min, or the speed fluctuation value △n, the quality classification index shall be as specified in Table 1. Table 1 Quality grading indicators of speed fluctuation under stable load Approved by the State Machinery Industry Bureau on March 30, 2000, and implemented on October 1, 2000
Drive shaft speed
3.3 Speed ​​fluctuation under cyclic load
JB/T51175—2000
Qualified products
W≤±025%
An,≤±2r/min
First-class products, superior products
≤±0.20%
An≤±1.5/min
Due to the cyclic torque generated by the tested injection pump, the instantaneous speed fluctuation of the mounting surface of the drive shaft coupling of the test bench within each revolution is caused. The quality grading indicators of its cyclic load speed fluctuation rate, or cyclic load speed fluctuation value △n, are as specified in Table 2. Table 2 Quality classification of periodic load speed fluctuations Drive shaft speed
Qualified products
An≤6r/minwwW.bzxz.Net
3.4 ​​Stable speed reduction (increase) value of test bench speed First-class products
, ≤1%
An≤5r/min
Superior products
An≤4r/min
When calibrating any injection pump within the working range allowed by the test bench, the speed reduction of the tested injection pump between no load and full load shall not exceed 12 of the speed reduction of the tested governor. The speed regulation size of the governor shall not exceed 5% for qualified products, and not exceed 3% for first-class and superior products. The test bench with speed gears shall be assessed separately according to the low speed gear and the high speed gear. 3.4.1 When the test bench speed n≤1200r/min, the stable speed reduction (increase) value of its low speed gear should satisfy the formula (1): An
Wherein: △ns is the stable speed reduction (increase) value of the test bench low speed gear, r/min; n is the test speed of the tested injection pump, r/min; 8 is the stable speed regulation rate of the tested injection pump, 8-5% for qualified products, 8=3% for first-class and superior products 3.4.2 When the test bench speed n>1200r/min, the stable speed reduction (increase) value of its high speed gear should satisfy the formula (2): An≤KAn
Wherein the value of K is: K=2.5 for qualified products and first-class products, and K=1 for superior products. (1)
3.4.3 When the test bench speed n≤1200r/min, the low gear transient speed reduction (increase) value △n4 is: qualified products, first-class products and superior products are not greater than 2 times the value specified in 3.4.1. 3.4.4 When the test bench speed is 1200
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