Mathematical model defining volumetric losses of hydraulic oil compres-sion in a variable capacity displacement pump

• Autorzy: Paszota Z.
• Języki publikacji: EN

Abstrakty

EN

The objective of the work is to develop the capability of evaluating the volumetric losses of hydraulic oil compression in the working chambers of high pressure variable capacity displacement pump. Volumetric losses of oil compression must be determined as functions of the same parameters, which the volumetric losses due to leakage, resulting from the quality of design solution of the pump, are evaluated as dependent on and also as function of the oil aeration coefficient ε. A mathematical model has been developed describing the hydraulic oil compressibility coefficient as a relation to the ratio ΔpPi/pn of indicated increase ΔpPi of pressure in the working chambers and the nominal pressure pn, to the pump capacity coefficient bP, to the oil aeration coefficient ε and to the ratio ν/νn of oil viscosity ν and reference viscosity νn. A mathematical model is presented of volumetric losses of hydraulic oil compression in the pump working chambers in the form allowing to use it in the model of power of losses and energy efficiency.

Słowa kluczowe

EN

hydrostatic drive; variable capacity displacement pump; volumetric losses of oil compression; mathematical model

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2014
• Tom: nr 4
• Strony: 90--99
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Paszota Z.

• Faculty of Ocean Engineering and Ship Technology , Gdansk University of Technology, Narutowicza 11/12, 80 – 233 Gdansk, POLAND

Bibliografia

• 1. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part I Energy losses in a drive system, volumetric losses in a pump. //International Scientific-Technical Conference Hydraulics and Pneumatics, Wrocław, 16 – 18 maja 2012 / Ośrodek Doskonalenia Kadr SIMP - Wrocław : ODK SIMP we Wrocławiu, 2012,
• 2. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part II Mechanical losses in a pump //International Scientific-Technical Conference Hydraulics and Pneumatics, Wrocław, 16 – 18 maja 2012 / Ośrodek Doskonalenia Kadr SIMP - Wrocław : ODK SIMP we Wrocławiu, 2012,
• 3. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part I Energy losses in a drive system, volumetric losses in a pump. // Polish Maritime Research 2/2012, Vol. 19
• 4. Paszota Z.: Effect of the working liquid compressibility on the picture of volumetric and mechanical losses in a high pressure displacement pump used in a hydrostatic drive. Part II Mechanical losses in a pump // Polish Maritime Research 3/2012, Vol.19
• 5. Paszota Z.: Theoretical and mathematical models of the torque of mechanical losses in the pump used in a hydrostatic drive (in Polish). Chapter in the monograph: „Research, design, production and operation of hydraulic systems” (in Polish) Adam Klich, Antoni Kozieł and Edward Palczak editors. „Cylinder” Library. „Komag” Mining Mechanisation Centre, Gliwice 2011
• 6. Paszota Z.: Theoretical and mathematical models of the torque of mechanical losses in the pump used in a hydrostatic drive (in Polish). „Napędy i sterowanie”, scientific monthly 10/2011
• 7. Paszota Z.: Theoretical models of the torque of mechanical losses in the pump used in a hydrostatic drive. Polish Maritime Research 4 / 2011, Vol. 18
• 8. Koralewski J.: Effect of the liquid viscosity on the energy characteristics of variable capacity piston pump (in Polish). Doctor dissertation (continued). Gdańsk University of Technology, Faculty of Ocean Engineering and Ship Technology
• 9. Koralewski J.: Effect of oil viscosity and compressibility on determination of volumetric losses in a variable capacity piston pump (in Polish). Paper submitted to the „Cylinder” 2013 Conference. Centrum Mechanizacji Górnictwa „Komag”, Gliwice 2013
• 10. Guillon M.: Theory and calculation of hydraulic systems (in Polish). Wydawnictwa Naukowo-Techniczne Warszawa 1967
• 11. Paszota Z.: Method of determining the degree of liquid aeration in a variable capacity displacement pump. Polish Maritime Research 3 / 2013, Vol. 20
• 12. Paszota Z.: Method of determining the degree of liquid aeration in a variable capacity displacement pump (in Polish). „Napędy i Sterowanie”, 11/2013
• 13. Koralewski J.: Influence of viscosity and compressibility of aerated oil on determination of volumetric losses in a variable capacity piston pump (in Polish). „Napędy i Sterowanie”, 11/2013
• 14. Koralewski J.: Influence of viscosity and compressibility of aerated oil on determination of volumetric losses in a variable capacity piston pump Polish Maritime Research 4 / 2013, Vol. 20.