This standard specifies the technical requirements, test methods, inspection rules, marking, packaging and storage of the inner and outer rotors of the JZS series powder metallurgy oil pumps. This standard applies to the inner and outer rotors of the JZS series powder metallurgy oil pumps. JB/T 7379-1994 Technical requirements for the rotors of the JZS series powder metallurgy oil pumps JB/T7379-1994 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T7379-94
JZS Series Powder Metallurgy Oil Pump Rotor
Technical Conditions
Published on 1994-07-26
Ministry of Machinery Industry of the People's Republic of China
Implementation on 1995-07-01
Mechanical Industry Standard of the People's Republic of China
JZS Series Powder Metallurgy Oil Pump Rotor
Technical Conditions
Subject Content and Scope of Application
JB/T 7379.-94
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging and storage of the inner and outer rotors of the JZS series powder metallurgy oil pump.
This standard applies to the inner and outer rotors of the JZS series powder metallurgy oil pump (hereinafter referred to as inner and outer rotors). 2 Reference standards
GB4136
GB5163
GB5957
GB6804
GB/T12767
JB2797
3 Technical requirements
Reduced iron powder for powder metallurgy
Determination of density of permeable sintered metal materialsSampling of sintered metal materials (excluding cemented carbide)Determination of radial crushing strength of sintered metal bushingsDetermination of surface hardness of sintered metal materials (excluding cemented carbide)
Surface roughness parameters and their values ​​of powder metallurgy productsPowder metallurgy iron-based structural materials
Part 1: Basic uniformity of cross-sectional hardness
The inner and outer rotors shall comply with the provisions of this standard and be manufactured according to the product drawings and technical documents approved through the prescribed procedures. 3.2The materials, chemical composition and mechanical properties of the inner and outer rotors shall comply with the requirements of Table 1, or other materials with equivalent performance shall be selected by agreement between the supplier and the buyer.
Inner rotor
Outer rotor
FTG60-20
FTG60-15
Chemical composition
C chemical composition
The surface roughness of the inner and outer rotors shall not be greater than that specified in Table 2. Table 2
Outer diameter surface of the outer rotor
Axis hole surface of the inner rotor
Both surfaces of the inner and outer rotors
3.4The tolerance grade of each main dimension of the inner and outer rotors shall not be lower than that specified in Table 3. Approved by the Ministry of Machinery Industry on July 26, 1994
Apparent hardness
Surface of inner and outer rotor gear sectors
Crushing strength between diameters
≥350
≥350
Other non-matching surfaces
Implemented on July 1, 1995
Tolerance grade
Or tolerance value
Inner rotor shaft hole diameter
Inner rotor major diameter
JB/T7379—94| |tt||Inner rotor short diameter
Outer rotor outer diameter
Outer rotor limit
Ring diameter
Outer rotor tooth type
Inscribed ring diameter
Rotor thickness
3.5 The meshing clearance of the inner and outer rotors before installation in the pump shall be within the following numerical range: when the inner rotor long diameter 2p<40mm, it shall be 0.2%~0.5% of its long diameter; when the inner rotor long diameter 2p≥40mm, it shall be 0.15%~0.4% of its long diameter. 3.6 The shape and position tolerances of the inner and outer rotors shall comply with the provisions of Table 4. Table 4
End face runout of the inner rotor at both ends to the center line of its shaft hole and the outer rotor at both ends to the center line of its tooth profile inscribed circle Parallelism of the inner rotor tooth Liao generatrix to the center line of its shaft hole Parallelism of the outer rotor tooth ratio generatrix to the center line of its outer circle Radial runout of the inner rotor top circle to the center line of its shaft hole and the outer rotor to the center line of its tooth profile inscribed circle 3.7 The inner and outer rotor surfaces are not allowed to have defects such as peeling, cracks, bruises, inclusions and oxidation. 3.8 The service life of the inner and outer rotors shall meet the user's requirements. 4 Test methods
4.1 The chemical composition of the material shall be determined in accordance with the relevant provisions of GB4136. 4.2 The density shall be determined in accordance with GB5163.
4.3 The apparent hardness shall be determined in accordance with GB9097.1 and the following provisions. Tolerance grade or tolerance value
≤1/2 of the tolerance of the major diameter
1/2 of the tolerance of the outer diameter
Punch 3 to 5 points in the middle of each curve on the end face of the outer rotor, and 3 to 4 points in the middle of each tooth on the end face of the inner rotor. The highest and lowest values ​​cannot differ by 15 Brinell hardness units. 4.4 The surface roughness shall be measured in accordance with GB/T12767, or determined by the sealed sample method. 4.5
The radial crushing strength shall be measured in accordance with GB6804 5 Inspection rules
5.1 The inner and outer rotors shall be inspected by the quality inspection department of the manufacturer and can only be shipped after passing the inspection. 5.2 When the inner and outer rotors are delivered and accepted in batches, the ordering unit can conduct random inspections of the rotor quality in accordance with the provisions of GB5957, and the qualified quality level AQL value shall be agreed upon by the supply and demand parties.
6 Marking, packaging, storage
The rotor must be cleaned and treated with rust prevention before packaging, and then wrapped with strong and impermeable neutral paper or plastic film and packed into the packaging box.
Each packaging box should be accompanied by a product certificate signed and stamped by the technical inspector of the quality inspection department of the manufacturer. 6.2
6.3The outside of the packaging box should be marked with:
Manufacturer name, registered trademark and address:
Product name, model and quantity:
Packing date.
6.4The boxed rotor must also be packed in a dry packaging box with moisture-proof measures, and ensure that it will not be damaged during normal transportation. The total weight of each box shall not exceed 20kg. Special packaging must be agreed upon by both the supplier and the buyer. 6.5 The outside of the packaging box should be marked with:
Manufacturer name and address;
Product name, model and quantity; wwW.bzxz.Net
Gross weight, kg;
Delivery location, name of receiving station;
Name and address of receiving unit;
Packaging box dimensions (length × width × height), cm; "Handle with care", "Moisture-proof", etc.; Packing date.
The packaged rotor should be stored in a ventilated, dry warehouse free of corrosive substances. Under normal storage conditions, the manufacturer should ensure that the rotor will not rust within 6 months from the date of leaving the factory. Additional remarks:
This standard was proposed and managed by Beijing Powder Metallurgy Research Institute. This standard was drafted by Luoyang Tractor Research Institute of the Ministry of Machinery Industry. The main drafter of this standard is Xie Keyan.
People's Republic of China
Mechanical Industry Standard
JZS Series Powder Metallurgy Oil Pump Rotor
Technical Specifications
JB/T7379-·94
Published by the Machinery Standardization Research Institute of the Ministry of Machinery Industry Printed by the Machinery Standardization Research Institute of the Ministry of Machinery Industry (PO Box 8144, Beijing 100081)
Copyright reserved
No reproduction allowed
Format 880×12301/16
6 Printing Sheets 1/2 Number of Words 6,000
First Edition May 1995 First Printing May 1995 Number of Prints 00.001--500
Price RMB 3.00
No. 94-157
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