JB/T 51179-2000 This standard is a revision of JB/T 51179-94 "Reliability Assessment and Evaluation Method, Bench Test Method, Fault Classification and Judgment Rules for Piston Oil Pump Assemblies". This standard specifies the reliability assessment and evaluation method, bench test method, fault classification and judgment rules for piston oil pump assemblies. This standard applies to the reliability measurement and assessment of piston oil pump assemblies. This standard was first issued in 1990 as JB/NQ 233-90, and the standard number was adjusted to JB/T 51179-94 in September 1994. JB/T 51179-2000 Reliability Assessment and Evaluation Method, Bench Test Method, Fault Classification and Judgment Rules for Piston Oil Pump Assemblies JB/T51179-2000 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T·51179—2000
Reliability Assessment and Evaluation Methods of Piston Oil Pump Assembly
Evaluation Methods, Bench Test Methods, Fault Classification and Judgment Rules
(Internal Use)
2000-03-30 Issued
National Machinery Industry Bureau
20-111-01 Implementation
K:T51179-2006
This standard is a revision of JB/5117994 "Reliability Assessment and Evaluation Methods of Piston Oil Pump Assembly, Bench Test Methods, Fault Classification and Judgment Rules". During the revision, the original standard was revised, and the main technical content was not changed. This standard replaces B/T51179-4 from the month of implementation, and this standard is withdrawn from the Technical Committee for Oil and Gas Standardization. The drafting unit of this standard: Guangji Oil and Gas Research Institute. The main drafters of this standard: Zhu Duanfen, Zhang Min, Chen Guoai. The standard number of this standard was adjusted to JB/T51179-94 in 1994. Scope
Machinery industry standard of the People's Republic of China
Applicable to reliability assessment of hydraulic oil pump assemblies
Evaluation method, self-test method,
Fault classification and judgment rules
(internal use)
JB/TS1179—200D0
JB/TS51179—94
In the standard, the reliability assessment method of non-standard hydraulic oil pump assemblies is verified, and the fault classification and judgment rules are reduced. This standard is applicable to reliability measurement and assessment of hydraulic oil pump assemblies. 2. Referenced standards
The provisions contained in the following standards are the provisions that are cited in the existing technical standards and constitute small standards. When the standard is not issued, the versions shown are all valid. All standards will be revised. The parties using the standard reduction should explore the possibility of using the following new versions of the standard flow rate. JD7T6295.1-1992 Technical parts of the active fuel delivery pump assembly JD/T31178-2000 Reliability assessment of synthetic fuel injection assembly through station method, bench test method, fault classification and judgment rules 3 Reliability assessment method
3.1 Reliability index
1.1 Flat gear failure interval time
Active The average working time between two failures of the pump assembly is calculated according to formula (1) or formula (2): MTBF
Wherein: MIBF-
-mean time between failures, H:
Number of samples in the feasibility test:
F-cut-off time of the feasibility test, T:
-the sum of the number of failures (excluding minor failures) occurring within the test cut-off time:
-the required cumulative working time of each sample. When -0, let MTBF-T
3.1.2 The average operating time before the first failure
refers to the average operating time when the product first fails, and it can be calculated by formula (3) or formula (4): MTFF
Approved by the National Machinery Industry Week on March 30, 2000, and implemented on October 1, 2000
JB/T51179-2000wwW.bzxz.Net
Where: MTFF is the average operating time before the first failure, I: the number of samples in the test sample that have the first failure [except for minor failures] The cumulative working time of the first fault (except for minor faults) of this product is h; 141
——The cumulative working time of the first sample of the product when the first fault (except for minor faults) occurs at the end of the feasibility test, or when the first fault (except for minor faults) of this product occurs, b,
When -0, MTTFF=2T.
3.1.R Limit life
refers to the working time and statistics of the product when 50% of the products in the batch reach the limit state under the hot use conditions, and is listed in the order of the actual use hours of the samples reaching the limit state from small to large: +t, .-I,
When half is an odd number. H..The life limit is! .…a is an even number, and the life limit is [-J2
The limit usually refers to the main parts of the piston oil pump assembly that have been damaged to the point of being unusable. 3.2 Reliability test method
3.2.1 After the test of the oil pump assembly or system is completed, the reliability index value is calculated in 3.1. If the reliability index value is greater than or equal to the standard value specified in the cold test, the manufacturer and the user agree that the reliability index value is greater than or equal to the standard value specified in the cold test. If a failure occurs, it is judged to be qualified: otherwise, it is unqualified.
3.2.2 The factory shall carry out user reliability verification based on this standard B: limit life and mean time to first failure (MTTFF).
4 Reliability test method
4.1 or verification Samples
4.1.1 The samples for feasibility test shall meet the requirements of product drawings and relevant technical documents, and shall be inspected and tested by the factory. 4.1.2 The samples shall be taken from the production line end of the production plant warehouse, and the sample size shall not be less than S0. The samples shall be taken from the market, and no limit shall be given. 4.1.3 Four random samples shall be taken.
4.2 Tests
4.1.1 The reliability test of the oil pump assembly shall be carried out in cold running on the indoor test bench. 4.1.2 The reliability test of the oil pump assembly shall be carried out in the form of a 1000h fixed-time test. 4.1.3 The reliability test of the oil pump assembly shall be carried out in the following conditions (maximum oil, speed 1 according to the requirements of its matching machine): 4.2.4 During the test, the price range test shall be carried out. The test time is: 0, 15, 30HF, 500, 750, 100h. a) During the general test. Check according to the provisions of 3.3.3 and 3.2 of JDT 6291.1-1992. If the performance exceeds the tolerance, adjust the static calculation according to the requirements of 4.2.3 and record it as a performance failure. b) If the pump is found to be damaged during the test or periodic measurement, it shall be replaced or repaired immediately and repaired according to the requirements of 4.2.3. It shall be recorded as a partial fault.
5 Fault Definition
.1 Fault Definition
JB/T51179-2000
Weak piston type All phenomena that the oil pump assembly and its parts cannot complete the specified functions or the performance indicators are reduced to outside the specified range. 5.1.1 Essential Fault
Under the intended use conditions, the fault is caused by the inherent defects of the piston type transmission pump assembly! 5.1.2 Faults caused by reasons other than the internal factors of the oil system or the previous fault, 5.2 Fault classification Faults that occur during reliability tests and actual use of the product are classified into categories, and their category codes, names and names are shown in the table. Table 1 Fault hazard categories Fatal Fault Sub-fault Fault Efficiency Modified Fault Mild 5.3 Fault occurrence time
Dangerous modification safety, assembly alarm or major loss rate
Fatal fault with a serious impact on the oil injection assembly point 1. The work or need to replace the heavy parts can only be repaired without personal danger, only to a certain extent to stop the impact of the spray type Pudong heart to complete the work and make your courage to teach the piano will not lead to the interruption of the year, do not need to replace the winter parts can be pointed out by the maintenance of the timely discovery of the fault, that is, record its exact time of occurrence. 5. 3. 1
5.3.2 Faults that cannot be discovered in time, according to formula (5) to determine the total occurrence time T is known. If there are , faults in the time interval [T,, then the time of the mth fault is calculated according to formula (3): = 5.4.4.5 ...
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