JB/T 9729-1999 JB/T 9729-1999 Specification for the sample of the diameter sealing value of the plunger assembly, the oil delivery valve assembly and the oil injection nozzle assembly of the diesel engine JB/T9729-1999 Standard download decompression password: www.bzxz.net

1CS43.060.40
Machinery Industry Standard of the People's Republic of China
JB/T9729-1999
Technical specifications for the samples of tightnesstests for plunger delivery valve of diesel fuelinjection pump and nozzle of diese injector1999-09-17Published
State Bureau of Machinery Industry
2000-01-01 Implementation
JB/T9729-1999
This standard is in accordance with the revision of 7.B/T194D27-90 "Technical conditions for the sealing value of the plunger of the diesel engine injection pump, the oil outlet, and the injection nozzle parts". During the revision, the original standard was edited and revised, and the main technical content was changed. This standard replaces 2B J94027 from the date of implementation. This standard is proposed and managed by the Fuel Injection Standardization Technical Committee. The unit of this standard: Fuel Pump Research Institute. The person in charge of this standard: Ji Xifen, Zhang Lidan. This standard was first issued in June 1990.
Standard of the Machinery Industry of the People's Republic of China
Samples of Diameter Sealing Values ​​for Plug Pump Column, Delivery Valve and Injection Nozzle of Diesel Engine
Technical Conditions
Technical specifications for the samples of 1lghtuesslests for pluger dehivery valve of diesel fueliajectia ponip nnd nozzle of diese injeelor ​​Scope
JB9729—[999
Preferential ZFTJ94(27--90
This standard specifies the technical conditions and test methods for the diameter sealing samples of the spray rod plug parts, oil outlet valve parts and oil pump parts of diesel engine.
This standard is applicable to the selection of diameter sealing samples of diesel engine start-up parts, oil outlet parts and fuel injection nozzle parts. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard was published, the version indicated All standard parts will be revised. All parties using this standard should explore the possibility of using the following new versions [B/T7[73.1-1W3 Dyeing tank pump parts technical conditions 3/T7174.11993
JB/T7296-1994
3 Technical requirements
Diesel fuel injection system oil outlet valve parts thermal specifications Diesel fuel injection nozzle parts technical conditions
3.1 The parts and parts of the sample shall be manufactured according to the production and technical documents approved by the prescribed procedures. The addition of T The degree should comply with the requirements of JB/T7173.1, B/T7174.1 and ID/T72. 3.2 The outer (inner) roundness of the sample parts shall meet the requirements of ±0.01mm. 3.3 Dynamics of sample parts
3.3.1 The sliding performance of the plug parts shall meet the requirements of JB/T7173.1, 3.3.2 The dynamic performance of the oil outlet valve parts shall meet the requirements of JB/T7174.1, 3.3.3 The dynamic performance of the injection parts shall meet the requirements of JB/T7296, 3,4 The upper and lower limit values ​​of the parts shall be determined by the departmental case 1.4.! The deviation between the calibration value of the lower limit sample and the lower limit sample of the diameter sealing value specified in the product technical documents is 0.2-+0.5s, and the difference between the maximum and minimum values ​​of all data tested daily is not greater than 0.78. The deviation between the calibration value of the upper limit sample of the diameter sealing value specified in the product technical documents is 0.5-+1.0s, and the difference between the maximum and minimum values ​​of all data tested monthly is not greater than 1.5s. Approved by the State Machinery Industry Bureau on September 17, 1999, 20(H-01-01 Implementationbzxz.net
JD/T 9719—1999
3.4.7 Determination of the lower limit sample of the oil outlet mesh seal diameter [The difference between the calibration value of the lower limit sample and the clearance value specified in the product technical specifications is +00U5m3.4.3 Determination of the lower limit sample of the oil outlet mesh seal diameter [The difference between the calibration value of the lower limit sample and the clearance value specified in the product technical specifications is +25m3.4.3 Determination of the lower limit sample of the oil outlet mesh seal diameter [The difference between the calibration value of the lower limit sample and the clearance value specified in the product technical specifications is +25m3. The difference between the maximum and minimum values ​​in the data is less than 0.4s. The deviation between the calibration value of the upper limit sample of the diameter sealing value of the nozzle coupling and the upper limit diameter sealing value specified in the product technical documents is ±5:H. The difference between the maximum and minimum values ​​of all the data tested is less than 1.0%. Test method and test equipment
4.1 Test equipment
4.1.1 When selecting the diameter sealing value samples of the nozzle coupling, the nozzle coupling/test bench with an accuracy that meets the requirements of the relevant technical documents shall be used. 4.1.2 When selecting the diameter sensing value samples of the nozzle coupling, the projection meter and the value comparator with an accuracy of 0.5 shall be used. 4.1.3 When selecting the diameter sealing value samples of the nozzle coupling, the oil drop test bench with an accuracy that meets the requirements of the relevant technical documents shall be used. 4.2 Test conditions
4.2. The ambient temperature during the test is 20℃±0.5℃, the test oil temperature is 20℃±0.54℃, 4.2.2 The test oil is a non-microfilm-resistant oil and a mechanical seal or special seal, and its kinematic viscosity is 10.3-106mmts at 20℃,
4.1.3 The mating parts must be placed in the test environment for 4 hours before testing. 4.2.4 The surface flatness tolerance of the mating parts and the end face of the mating parts is 0.000mm. 4.5 When testing the mating parts, the verticality tolerance of the mounting hole of the mounting sleeve on the mounting surface of the mounting plug and the mounting plane of the plunger sleeve is 0.05mm, and the verticality tolerance of the mounting plane of the mounting plug is 0.02mm. The required straightness tolerance of the guide hole of the test bench is 0.05mm
4.2.6 The diameter deviation of the positioning pin of the case sleeve is -0.02--0.01mm. 4.2.7 When the plug is tested, the pressure in the pressure chamber of the column seal is 19.6M±0.3MPa. 4.2.8 The required effective stroke is 3nm±0.05mm. 4.3 Test method
4.3.! Before the test, the mating parts should be cleaned thoroughly, and the mating parts should have good sliding properties. 4.2 Test method for the selection of the diameter of the column seal value sample During the test, two tests should be carried out, and the formal test and record should be carried out after the value is basically stable. Each pair of dummy parts must be clamped in reverse once when it is formally measured, and it is carried out in a discontinuous time. Each time it is clamped, 5 teaching broadcasts are measured, and 4 data are connected. A total of 12 data can be obtained for each measurement. The average value of these numbers is the calibration value of the diameter sealing value sample of the pair. 4.3.3 The diameter of the oil outlet valve pair is directly measured on the projection optical meter with an accuracy of 0.5m and the line value comparison position. 4.3.4 The diameter sealing value sample of the fuel injection nozzle pair is selected for testing. 4.3.4.1 When testing the diameter of the fuel injection nozzle pair, the oil pressure should be raised to 22~23MPa first, and the timing starts when the pressure drops to 19.6MPa, and the timing ends when the pressure drops to 17.7MPa.
4.3.4.2 During the inspection, the pre-test should be carried out. After the value is basically stable, the test should be carried out and recorded. Each part must be tested six times in total. Three data are measured in each direction. The last two data are taken. In this way, a total of 12 data are obtained. The average value of them is the calibration value of the diameter sealing value sample of the part.
JBrr 9729-1999
5 Use and validity period of the upper and lower limit samples of the diameter sealing value of the part 5.1 Parts that meet the above requirements shall be used as the diameter sealing value samples of the part. The samples shall be numbered and registered in a certain procedure, and the sample selection unit shall issue a certificate before use. .2 The validity period of the diameter sealing value samples of the part is 1 year. After the expiration of the validity period, they shall be reviewed in time. If the review is qualified, they can still be used. Those that exceed the validity period or pass the review shall not be used.
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