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17
Rotor Clearance
Rotor clearance must be precisely maintained to provide maximum pumping efficiency, yet prevent
contact between rotors, rotor case, and front cover during operation.
If pumping efficiency is lower than expected or if parts contact has occurred during operation (Within
rated differential pressure), check the rotor clearances and adjust, if incorrect.
Standard Rotor Clearances (mm)
Material
Clearance \ Model No.
ZP015
ZP030
ZP060
ZP130
Illium8
Back Face
0.05
0.05
0.10
0.10
Rotor to Body
0.05
0.05
0.13
0.13
Front Face
0.13
0.13
0.20
0.20
SUS316L
Back Face
0.15
0.15
0.25
0.25
Rotor to Body
0.15
0.15
0.28
0.28
Front Face
0.23
0.23
0.35
0.35
There are two areas of rotor clearances as illustrated following:
-
Rotor tip clearance; not adjustable set by manufacturer
-
Front and back face clearance; adjustable by shim
Rotor thickness and body depth are fixed at manufacturer. Therefore, with the correct rotor size
selected, the only maintenance adjustment that can be made is the proportion of front and rear
clearance. Measure the front clearance as follows:
1.
The rotor to rotor housing back face clearance is maintained by the shim(s) (45).
2.
Check that the rotor case is tight to the gearbox (1A). And check the rotor bolts (35) are tight.
3.
Measure the clearance between the back face of the rotor case and the back of the rotor with
a feeler gauge with reference of the above recommended back face clearance.
4.
If incorrect, adjust by adding or removing shim(s) (45) from behind the rotor case.
5.
Check each rotor and adjust as necessary.
Fig. 33
Содержание JEC JRZP Series
Страница 1: ...Operating Maintenance Manual J JE EC C J JR RZ ZP P S Se er ri ie es s Circumferential Piston Pumps ...
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Страница 35: ...34 EXPLODED VIEW ZP030 ZP060 ZP130 ...
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