Conclusions
The pressure in the inter-tooth space of metering pumps can reach significant levels (greater than 5.5 MPa) and exert a large effect on the operational lifetime of pumps.
In designing metering pumps with the objective of reducing the pressure in the inter-tooth space, it is necessary to select as small a modulus of the gear wheels as possible and to reduce the frequency of rotation by increasing the pump delivery per rotation.
In metering highly viscous polymers, a low frequency of rotation and maximally allowable end gaps make it possible to reduce dissipative heating of the polymer in the gaps to a minimum.
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Literature cited
V. I. Stupa and Yu. A. Chernyshov, Khim. Volokna, No. 5, 47–48 (1982).
V. I. Stupa, Candidate's Dissertation, VNIIL TEKMASh, Moscow (1971).
T. M. Bashta, Engineering Hydraulics. A Handbook Aid [in Russian], 2nd edn., revised and supplemented, Mashinostroenie, Moscow (1971).
Yu. A. Chernyshov, Candidate's Dissertation, MTI, Moscow (1982).
Additional information
Translated from Khimicheskie Volokna, No. 2, pp. 53–55, March–April, 1984.
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Stupa, V.I. Analytical determination of the pressure in the inter-tooth space of a metering gear pump. Fibre Chem 16, 118–120 (1984). https://doi.org/10.1007/BF00555887
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DOI: https://doi.org/10.1007/BF00555887