JB/T 7173.1-1993 Technical Specifications for Diesel Engine Fuel Injection Pump Plunger Assemblies JB/T7173.1-1993 Standard Download Decompression Password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7173.1-1993
Diesel Engine Fuel Injection Pump Plunger Pair
Technical Conditions
Published on November 21, 1993
Ministry of Machinery Industry of the People's Republic of China
Implementation on March 1, 1994
Mechanical Industry Standard of the People's Republic of China
Diesel Engine Fuel Injection Pump Plunger Pair
Technical Conditions
1 Subject Content and Scope of Application
JB/T 7173.11993
This standard specifies the technical requirements, inspection rules, marking, packaging, transportation and storage of medium and small power diesel engine fuel injection pump plunger pairs (hereinafter referred to as plunger pairs).
This standard applies to medium and small power diesel engine fuel injection pump plunger pairs. 2 Reference standards
GB1031
GB1299
GB2828
GB2829wwW.bzxz.Net
ZBJ94005
ZBJ94019
ZB/TJ94021
3 Technical requirements
Light diesel oil
Surface roughness parameters and their values
Technical conditions for alloy tool steel
Batch inspection counting sampling procedures and Sampling table (applicable to the inspection of continuous batches) Periodic inspection counting sampling procedures and sampling tables (applicable to the inspection of the stability of the production process) Technical conditions for chromium bearing steel
Diesel engine fuel injection nozzle pair, fuel injection pump plunger pair, fuel injection pump oil delivery valve pair Metallographic inspection of fuel injection nozzle pair, plunger pair, oil delivery valve pair Magnetic particle inspection method Diesel engine fuel injection pump plunger pair delivery acceptance technical conditions 3.1 Plunger pairs shall be manufactured according to product drawings and technical documents approved by the prescribed procedures, and shall comply with the requirements of this standard. 3.2 Plunger and plunger sleeve shall be made of GCr15 ball bearing steel in accordance with the provisions of YB9, or CrWMn alloy tool steel in accordance with the provisions of GB1299.
With technical basis and user consent, plunger and plunger sleeve are allowed to be made of other grades of steel. 3.3 Plunger and plunger sleeve shall be heat treated, and the metallographic structure shall comply with the provisions of ZBJ94005. If the materials used for the plunger and plunger sleeve do not conform to ZBJ94005, their metallographic structures shall comply with the provisions of the relevant technical documents. 3.4 The hardness of the plunger and plunger sleeve shall be 60~64HRC, and no burns are allowed on the surface. 3.5 The plunger and plunger sleeve shall be subjected to magnetic particle inspection in accordance with the provisions of ZBJ94019. 3.6 The edges on the surface of the plunger pair that play the role of oil distribution (the working end face of the plunger, the inclined groove and the oil distribution hole of the plunger sleeve, etc.) shall maintain sharp edges, and no protrusions, depressions, chamfers, peeling and burrs are allowed. 3.7 The inner and outer cylindrical working surfaces of the plunger and plunger sleeve are not allowed to have scratches. 3.8 The shape and position tolerances of the plunger and plunger sleeve shall comply with the provisions of Figures 1, 2, 3 and Table 1. Approved by the Ministry of Machinery Industry on November 21, 1993
Implemented on March 1, 1994
Part Name
Plunger Sleeve
JB/T 7173.11993
Roundness of the cylindrical working surface that matches the plunger sleeve (i.e. the cylindrical working surface between the oil pressure end face and the upper end of the inclined groove)
Straightness of the axis of the cylindrical working surface that matches the plunger sleeveParallelism with the element line of the cylindrical working surface that matches the plunger sleeve (the large end is only allowed at the oil pressure end)
Circular runout of the end face that plays the role of oil distribution to the axis of the cylindrical working surfaceInclination of the edge line of the plunger inclined groove (or spiral groove) that plays the role of oil distributionRoundness of the inner cylindrical working surface that matches the plunger (the cylindrical working surface between the sealing end face and the oil inlet hole)
Straightness of the axis of the inner cylindrical working surface that matches the plungermm
20:0.0006
Part name
JB/T 7173.11993
Continued Table 1
Parallelism of the element line of the inner cylindrical working surface matching with the plunger (the small end is only allowed at the oil pressure end, and the bell mouth caused by grinding is allowed within 2mm from the large end face and 3mm from the small end face)
d≤20
Flatness of the sealing end face of the plunger sleeve
Circular run-out of the supporting end face to the axis of the inner cylindrical working surfaceParallelism of the sealing end face to the supporting end face
Radial circular run-out of the outer circular surface matching with the pump body to the axis of the inner cylindrical working surface
20:0.0006
Note: The roundness measurement adopts a roundness meter with an accuracy value of not less than 0.1μm, and the filter gear: 1~50Upr is used for fine grinding, 1~15Upr is used for matching grinding, and the probe radius is not less than 0.025mm.
The surface roughness of the plunger pair of the fuel injection pump shall comply with the provisions of GB1031. 3.9.1
The roughness R of the inner and outer cylindrical working surfaces of the plunger sleeve and the plunger are both 0.05μm, and the surface roughness R of individual parts of the guide surface of the part is allowed to be 0.10μm. The surface roughness R of the cylindrical working surface of the plunger using the matching grinding process is 0.10μm. 3.9.2
The roughness R of the sealing end surface of the plunger sleeve is 0.20um. There should be a certain radial clearance between the inner and outer cylindrical working surfaces of the plunger sleeve and the plunger, which is expressed by the diameter sealing value of the oil pressure test. 3.10.1
The diameter of the oil inlet and return holes on the plunger sleeve is 2.5~3mm. The diameter sealing value of the plunger pair on the same center line shall comply with the provisions of Table 2.
Plug diameter
When the effective stroke of the plunger geometry is 3mm, its diameter sealing value s
When the plunger pair has an oil drain hole, oil drain groove or the structural parameters do not meet the requirements of Article 3.10.1, its diameter sealing value shall be in accordance with the provisions of the technical documents approved by a certain procedure.
The plunger should have good sliding properties in the plunger sleeve. 3.11
Reliability of plunger pair
The reliability index value of the plunger pair is agreed upon by the supply and demand parties, and the reliability index value of the plunger pair is calculated as follows. MTTF=↓(Zt, +(nr)T)
Where: MTTF
Average working time before failure, h;
Number of samples that fail within the test deadline; Time when the i-th plunger pair fails, h; t
n—Number of reliability test samples;
T. Test truncation time, h.
When r=0, let MTTF=2nTa.
JB/T7173.1-1993
3.13 If the user complies with the instruction manual, the warranty period of the plunger pair is 1 year from the date of leaving the factory, and the cumulative use time shall not exceed 1200h. If it is damaged or cannot be used normally due to the manufacturer's responsibility, the manufacturer shall replace it. 4 Inspection rules
4.1 The plunger pair must be inspected by the manufacturer's quality inspection department in accordance with this standard and can only leave the factory after passing the inspection. 4.2 The factory inspection items are generally Articles 3.10 and 3.11. 4.3 The sampling rules for factory inspection and the judgment of whether it is qualified or not shall be in accordance with the relevant provisions of GB2828. The sampling rules for type inspection and the judgment of whether it is qualified or not shall be in accordance with the relevant provisions of GB2829. 4.4 The acceptance of the distributor and supporting units shall comply with the relevant provisions of ZB/TJ94021. 5 Marking, packaging, transportation and storage
5.1 Each pair of plunger parts shall be clearly marked with the factory logo or trademark of the manufacturer. 5.2 Each pair of plunger parts shall be treated with corrosion protection and packaged. 5.3 The plunger parts that have been treated with corrosion protection and packaged shall be packed into a moisture-proof packaging box together with the product certificate signed by the inspector and relevant factory documents, and the outer surface of the packaging box shall be marked with: a. Product name;
b. Product model;
c. Production license number;
d. Standard number;
e. Quantity in the box;
f. Factory logo or trademark of the manufacturer;
g. Manufacturer's name;
h. Packing date (year, month);
i. Transportation protection mark.
The weight of each packaging box shall not exceed 30kg.
5.4 During transportation, plunger pairs should be protected from mechanical damage, chemical corrosion and adverse effects of external climate change. 5.5 Plunger pairs should be stored in a dry warehouse and should not be stored together with acids, alkalis and other chemicals that can cause corrosion. Under normal storage conditions, the manufacturer should ensure that the product will not rust within 12 months from the date of leaving the factory. Additional notes:
This standard was proposed and coordinated by the Wuxi Oil Pump and Nozzle Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Wuxi Oil Pump and Nozzle Research Institute, Shanghai Internal Combustion Engine Research Institute and other units. The main drafters of this standard are Zheng Peina and Xu Guanming.
Mechanical Industry Standard of the People's Republic of China
Technical Articles for Diesel Engine Injection Pump Plunger Pairs
JB/T7173.11993
Published by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2, Shouti South Road, Beijing
Postal Code: 100044)
Print Sheet 1/2
Format 880×1230
Word Count 8,000
First Edition in January 1994
First Printing in January 1994
Print Quantity 1-500
Price 3.00 Yuan
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_I /
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