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The paper presents an analysis and validation method for a CAD model of a spur gear pumps series using FEM simulations. The analyzed pump is a new improved variant chosen among several constructive solutions created by parametric aided design in a range of gear pumps. Using mathematical computations and a calculus methodology there were identified the pressure values and forces generated in the pump assembly. The proposed study is especially applied to the gearing area and to the outlet chamber, where values and their variations are higher. FEM simulations are performed in these areas in order to identify and to present in a summary table the values of maximum stress, deformations and the percentages of calculation errors. The pump modelled and optimized by successive simulations led to the creation of an innovative gear pump series depending on the requirements imposed by the beneficiary.

This work presents the results of the researches with application in production to achieve innovative low-noise gear pumps using the embedded engineering. It presents the research findings on the pump operating parameters in order to reduce by 70% the pressure pulsations resulting low frequency noise of gear pumps. Innovative design feature is given by the use of gears with inclined teeth at 15º-20º with small play of gears and integration of innovative clearing pieces. The embedded engineering of the low-noise pumps leads to a progressive -continuous pumping system resulting a minimum pulsation of the discharge pressure. The research results lead to increased market competitiveness of the pumps made, which have a noise level of 55 dB at pressures up to 250 bar and 1000.....4000 rev/min, depending on the geometric volume, in the same time accompanying with a very low pulsation of the pressure.

This paper present the results of the researches regarding innovative and adaptive design of gear pumps for engineering of polymeric products with application in production of injection molding machine. It shows the description of gear pump with innovative design and double gear pump – innovative design, highlighting innovative design feature through constructive adaptation depending on requirements, having (30 – 40) % smaller at the axial size, compared to the classic pumps. They highlight the competitive advantages of innovative pumps with superior technological parameters. The paper also shows numerical simulation of technological parameters for pumps in innovative and adaptive variant proving the correctness and the advantages of new variants. Using the innovative variant allows the development a family of gear pumps, single and double, extremely compact, robust, reliable and with low manufacturing costs.