JB/T 50063-2000 This standard is a revision of JB/T 50063-95 "Reliability Assessment Method, Bench Test Method, Fault Analysis and Judgment Rules for Automatic Advance Device of Fuel Supply Angle of Diesel Engine Injection Pump". This standard specifies the reliability assessment method, bench test method, fault classification and judgment rules for automatic advance device of fuel supply angle of diesel engine injection pump. This standard is applicable to the reliability assessment and evaluation of advance device for diesel engine injection pump. This standard was first issued in 1989 and revised for the first time in 1995. JB/T 50063-2000 Reliability Assessment Method, Test Method, Fault Classification and Judgment Rules for Automatic Advance Device Assembly of Fuel Supply Angle of Diesel Engine Injection Pump JB/T50063-2000 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JBT50063—2000
Diesel Engine Fuel Injection Pump
Reliability Assessment Method and Test Method for Fuel Supply Angle Automatic Advance Device Assembly.
Fault Classification and Judgment Rules
(Internal Use)
Published on 2000-03-30
National Machinery Industry Bureau
Implemented on 2000-10-01
3—2000
This standard is a revision of JB/50063.-95 "Reliability Assessment and Assessment Method, Test Method, Fault Classification and Judgment Rules for Fuel Supply Angle Automatic Advance Device Assembly of Diesel Engine Fuel Injection Pump". The original standard was revised in a sequential manner, and the main technical content was not changed. This standard replaces JB/T50063—95 from the date of implementation. This standard was proposed and managed by the Fuel Pump Injection Standardization Technical Committee. The drafting unit of this standard: Wuxi Fuel Pump Injection Research Institute. The main drafters of the standard: Zhang Ximin, Zhuang Tianfen, Chen Guoqiang. This standard was first issued in 1989 and revised for the first time in 1995. Scope
Mechanical Industry Standard of the People's Republic of China
Diesel Engine Fuel Injection Pump
Loadability Assessment Method, Test Method,
Fault Classification and Judgment Rules for Automatic Advance Device Assembly of Fuel Supply Angle
(Internal Use)
JB/TKUD63-2000
Generation IB/50063:9:
This standard specifies the reliability assessment and evaluation method, bench test method, fault classification and judgment rules for the automatic advance device of the fuel supply angle of diesel engine injection pump (hereinafter referred to as advance device). The reliability assessment and evaluation of the advance device for diesel engine fuel pump is not marked. 2 Cited standards
The texts contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, all versions are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest version of the following standards. JB.7761.1—1995 Technical conditions for automatic advance device of fuel supply angle of diesel engine JB.7761.2—1995 Performance test of automatic advance device of fuel supply angle of diesel engine 3 Reliability
3.1 Reliability evaluation index Www.bzxZ.net
3.1.1 Mean fault interval time
refers to the average operating time between two faults. MTDF is calculated according to formula (1) or formula (2):
In the formula; MTB—mean fault interval time, n—reliability test sample; ||tt t||T—Reliability test cut-off time, J:
—The total number of failures (excluding failures that have been tested) that occur within the test time; the cumulative working time of the first sample, h. 3.1.2 Mean operating time to first failure
refers to the average operating time when the advancer first fails, calculated according to formula (3) or formula (4): MTTFF
Approved by China Waste Machinery Industry Corporation on March 30, 2000.
Implemented on October 1, 2000
JB/T50063—2000
Formula: MTTFF—operating time before first failure, h; +h -r. ]
Sugar test sample, sample water application of the first failure (except minor failure): 1-the first failure (except minor failure) of the first sample, the cumulative working time, h: [4i
, at the end of the feasibility test. Or the cumulative working time of the first failure (except minor failure) of the sample in the adjusted sample, h.
When -0, MTTFF-2
3.1.3B Limit life
The working time when the push-pull unit is used under the specified conditions of use until 50% of its products reach the limit state: when the actual use hours of the sample reach the limit state are ranked from small to large: I,rt+ ,t.
When it is an odd number,. The limit life is
When it is an even number,, the limit life is [(+] The limit state usually refers to the state of free compensation for the main zero damage ring flip. 3.2 Reliability assessment method
3.1.1 After the reliability test of the advance device is completed, the MTBF and MTTFF two average reliability assessment index values ​​are calculated according to the formula in 3. If the two reliability assessment index values ​​are greater than or equal to the target values ​​specified in the normal test bench, and no fatal failure occurs, it is judged as qualified: otherwise it is judged as unqualified 3.2.2 The factory shall carry out H. limit life and MTTFF user tuning according to this standard, and the sample shall be no less than 1D sets. 4. Test method 4.1 Test sample 4.1.1 The components of the advancer to be tested shall comply with the provisions of the relevant technical documents of the product drawings, and the non-final inspection department shall conduct joint inspection 4.1.2 Sampling in the warehouse of the production plant or the production site, the sample shall be no less than 50: sampling in the user or the market, no limit on the sample speed, 4.1.3 Randomly throw 4 sets. 4.2 Test method 4.2. The reliability test of the advancer shall be installed on the fuel injection pump equipped with the fuel injection or the fuel injection pump with similar performance, and cold drag operation shall be carried out in the indoor bamboo dyeing. 4.2.2 The reliability test of the advancer shall be carried out in the 750h timed cut-off test mode. 0-650h is constant speed condition, 65-750h is variable speed condition
a) Constant condition: the condition of the load at the calibration point and the speed at the calibration point; b) Variable speed condition: the load at the calibration point and the speed change. 1 said, the speed changes from the advancer to the calibration speed, and then from the calibration speed to the advancer. The cycle is 20s. 4.2.3 During the test, the advance stage is tested. The time scales are: 0, 150, 300, 630, 750h, 1) During the stage inspection, check according to JB/17761.1. If the performance is out of tolerance, the advance angle deviation exceeds ±0.8°, and the compensation error exceeds 0.5°, JB/17761.1 requires adjustment and modification, and record it as a performance fault: b) During the test period or stage inspection, if any part is found to be damaged, it shall be replaced immediately and replaced according to 1/1776! The parts shall be submitted for new testing and the parts shall be corrected.
5 Fault determination
5.1 Fault definition
JB/T 50063Z000
A phenomenon in which the advancer group and batch parts cannot complete the specified functions or the performance indicators deteriorate to a level outside the specified range. 5.1.1 Essential fault
A fault caused by the internal factors (defects) of the advancer itself under the specified use case. 5.1.2 Secondary fault
A fault caused by reasons other than the internal factors of the advancer itself or induced by the previous fault. 5.2 Fault classification
Faults that occur in advancer products during reliability tests and actual use are divided into four categories according to the degree of harm. The category codes, names and meanings are shown in the table.
Inflammation type
Fatal fault
Serious fault
Excessive fault
Minor fault
5.3 Time of fault occurrence
Full point safety, alarm or greater economic significance
Except for complete failure, any minor repairable fault that may affect the normal operation of the device or require replacement of essential parts, which may cause major harm, and only qualitatively affect the device and stop in advance. 1. The fault that is easy to handle will not temporarily cause work interruption, does not require replacement of essential parts or the fault that can be easily eliminated in daily maintenance. 5.3.1 Faults that can be detected in time and their exact time of occurrence should be recorded immediately. 5.3.2 For the faults that cannot be changed and discovered, their occurrence time can be determined according to formula (5). It is known that there are , faults occurring within the time interval [ ], then the time of occurrence of the mth fault is: Th = t,
5.4 Change the time measurement
5,4! When calculating the reliability index, only the essential faults are counted, and the dependent faults are not counted repeatedly, but they should be recorded in the fault statistics table. 5.4.2 The essential faults should be evaluated and classified based on the serious consequences. A fault can only be judged as one of the four types of faults. 5.4.3 The faults and categories of the advancer should be judged according to Table 2. If a fault not listed in Table 2 is found, its category can be determined according to the classification principle of Table 1 and the examples in Table 2.
JB/T 500632000
Battle type
Total response
Decision compensation
National dynamic
Loose nut
Loose pin
Performance is poor
Possible immersion
Irreparable
External type
Explanation
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