This standard specifies the type, category, grade, model, size and parameters of the inner and outer rotors of the JZS series powder metallurgy oil pump. This standard applies to powder metallurgy rotors for oil pumps for internal combustion engines below 196kW: the oil pump speed is 1000~4000r/min, and the flow range is 0.5~157L/min. Powder metallurgy rotors of medium-pressure rotor pumps for hydraulic systems and rotors of other materials can also refer to this standard. JB/T 5964-1991 JZS series powder metallurgy oil pump rotor type, size and parameters JB/T5964-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5964—91
JZS series powder metallurgy oil pump rotor
Type, size and parameters
Published on December 11, 1991
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Implementation on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
JZS series powder metallurgy oil pump rotor
Type, size and parameters
Subject content and scope of application
JB/T5964—91
This standard specifies the type, category, grade, model, size and parameters of the inner and outer rotors of the JZS series powder metallurgy oil pump. This standard applies to powder metallurgy rotors for oil pumps for internal combustion engines below 196kW: the oil pump speed is 10004000r/min, and the flow range is 0.5～157L/min. Powder metallurgy rotors and rotors of other materials for medium-pressure rotor pumps for hydraulic systems can also refer to this standard. 2 Terminology
2.1 Blades and knots
Blades refer to the convex parts of the inner rotor; knots refer to the concave valleys of the outer rotor. 2.2 Gear ratio (i)
The ratio of the number of blades Z of the inner rotor to the number of knots Z of the outer rotor. 2.3 Eccentricity (e)
The distance between the center of the inner rotor and the center of the outer rotor when the inner and outer rotors are in meshing state. 2.4 Containment area (A)
The area contained by the inner and outer rotors between two adjacent meshing points when the inner and outer rotors are in meshing state. 2.5 Maximum effective inclusion area (A.)
The difference between the maximum inclusion area A and the minimum inclusion area A between two adjacent meshing points of the inner and outer rotors. Figure 1 Structure diagram of the inner and outer rotor pairs
2.6 Item clearance (4)
When the inner and outer rotors are in the minimum inclusion area meshing position, the radial distance between the highest point of the inner rotor convex part and the lowest point of the outer rotor concave valley, as shown in Figure 1.
2.7 Creation radius (R)
The distance between the center of the outer rotor and the center of the outer rotor tooth profile circle, as shown in Figure 3. Approved by the Ministry of Machinery and Electronics Industry on December 11, 1991 and implemented on July 1, 1992
2.8 Meshing clearance (e)
JB/T5964—91
When the inner and outer rotors are in meshing state, the radial distance between the highest point of the inner rotor convex part and the highest point of the outer rotor convex part is shown in Figure 2. 3 Rotor types, grades and modelswwW.bzxz.Net
3.1 External rotor types
There are two types as shown in Figures 3 (a) and (b). Type (a) is composed of two sections of tooth profile circular arcs (radius r) and a small circular arc (radius r) connected tangently. Type (b) is composed of a limiting circular arc (radius L) intersecting with two sections of tooth profile circular arcs (radius r). The sharp corner of the intersection is marked with a small circular arc (radius r) tangent to the two circular arcs.
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