ESTABLISHING FORMULAS FOR DESIGN OF ROOTS PUMP GEOMETRICAL PARAMETERS WITH GIVEN SPECIFIC FLOW RATE
Keywords:Roots pump, lobe pump, hypocycloid, epicycloid
Roots pumps are quite common in industry as well as in modern life. They can be applied in the lubrication system of the diesel engines, or in the automatic production lines etc. One of the most important specifications of the pump is flow rate, but this parameter itself depends on the speed and the volume of the pump chambers. The speed can be changed through transmission units, and the volume of the pump chambers depends on the profile form of the impellers. Finally, the profile form of the impeller depends on the geometrical parameters. That means in order to calculate the geometrical parameters of the pump, we must establish the relationship between the geometrical parameters of the impeller profile and the specific flow rate. Based on the theoretical results, the authors carried out programming software module to calculate the geometrical parameters to form profiles of the impellers, as well as the specific flow rate. The module is built by embedding AutoLISP language into AutoCad environment, in order to automatically design this type of pumps.
Authors who publish with Vietnam Journal of Science and Technology agree with the following terms:
- The manuscript is not under consideration for publication elsewhere. When a manuscript is accepted for publication, the author agrees to automatic transfer of the copyright to the editorial office.
- The manuscript should not be published elsewhere in any language without the consent of the copyright holders. Authors have the right to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal’s published version of their work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are encouraged to post their work online (e.g., in institutional repositories or on their websites) prior to or during the submission process, as it can lead to productive exchanges or/and greater number of citation to the to-be-published work (See The Effect of Open Access).