JB/T 51182-2000 Reliability assessment method, bench test method and failure judgment of injection pump plunger valve components

JB/T 51182-2000 This standard is a revision of JB/T 51182-94 "Reliability Assessment Method, Bench Test Method and Failure Judgment Rules for Fuel Injection Pump Plunger Pair". This standard specifies the reliability assessment method, bench test method and failure judgment rules for fuel injection pump plunger pair. This standard applies to the reliability determination and assessment of fuel injection pump plunger pair. This standard was first issued in 1990 as JB/NQ 236-90, and the standard number was adjusted to JB/T 51182-94 in 1994. JB/T 51182-2000 Reliability Assessment Method, Bench Test Method and Failure Judgment of Fuel Injection Pump Plunger Valve Pair JB/T51182-2000 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JBIT51182-2000
Reliability Assessment of Fuel Injection Pump Plunger Couple
Evaluation Method, Bench Test Method and Failure Judgment (Internal Use)
Published on 2000-03-30
National Bureau of Machinery Industry
Implementation on 2000-10-01
JB/T51182—2000
This standard is a revision of the old B/TS118294 "Reliability Assessment of Fuel Injection Pump Plunger Couple, Bench Test Method and Failure Judgment Rules". The original standard was revised and unified. The main technical content has not changed. The standard replaces JB/T51182-94 from now on. This standard is proposed by the Oil Pump and Nozzle Standardization Technical Committee. The original standard is issued by the Oil Pump and Nozzle Standardization Technical Committee. The main contributors of this standard are Zhang Linen, Zhu Duanfen, and Chen Kunqiang. The standard was first issued in 1990. In 1994, the standard number was adjusted to JB715:182-94. Scope
Machinery Industry Standard of the People's Republic of China
Reliability Assessment of Injection Pump Plunger Pairs
Evaluation Method, Bench Test Method and Failure Judgment (Internal Use)
JK/T 51182-2000
This standard specifies the reliability assessment method of injection system components, and the failure judgment rules based on bench test. This standard is used for reliability determination and assessment of oil system plunger components. 2 Introduction! Standards used
The clauses contained in the following standards shall be used or used in this standard to constitute the clauses of this standard: When this standard is published, the clauses shown in the accompanying text are valid. All standards will be revised and the parties using this standard shall use the latest versions of the following standards. B 7173.1 1993 Technical conditions for plunger components of diesel engine injection system JB/78-2060
Synthetic oil assembly performance evaluation method, bench test force method, classification and judgment rules 3 Reliability evaluation wwW.bzxz.Net
3.1 Reliability evaluation index
MTTF refers to the half-mean working time before the tip failure of the oil-like plunger component, calculated according to formula (1), MTTH
In the formula: MTIF-average working time before the tip failure, h, the number of samples that will fail at the end of the test; T test time, n:
t, the first! Time for component failure: h:-hours, including MTTF-2T.
3.2 Reliability evaluation method
When MTT is equal to or greater than the target value (target value provided by the manufacturer and the user), it is considered as qualified; if it is shorter, it is considered as unqualified.
4 Reliability test method
4.1 Sample
4.1.1 The components selected for reliability test shall comply with the provisions of product drawings and relevant technical documents: 1. And qualified by the factory inspection department: 4.1.2 Sampling in the factory warehouse or at the end of the production line. The sample shall be no less than 90 pairs: 4.1.3 Randomly select no less than 6 pairs per unit for reliability test. 4.2 Test and operation
Approved by the State Administration of Machinery Industry on March 30, 2000, implemented on October 1, 2000
JB/T51182-2000
. The reliability test of the adjustment parts is to install the pump in the fixed spray system reliability test bench 1 and carry out the drag operation. 4.2.2 The time reliability test of the column parts is carried out in the 750h timed test room. 4.2.3 The reliability test conditions of the frequency adjustment parts are the same as those of the equipped spray system, and the supply pipe and its bias are adjusted according to the requirements of JB/T51182.
.2.4 If the column case is damaged during the test, it is judged as a failure and the test of the failed sample is stopped. 4.2.5 When the 750h test is completed, the diameter of the screen should be checked according to the provisions of 773.1. If the sealing value is lower than the sealing value F limit (gap increase) of similar products for more than 3s, it is judged as a failure. 5 Time of failure occurrence
5. For failures that can be discovered in time, the exact time of failure is recorded. 5.2 For failures that cannot be discovered in time, the time of occurrence is determined by formula (2). If n failures occur within a time interval of [,], the minimum time of the first failure is: T
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