Gear Pump - an overview | ScienceDirect Topics
2012年3月3日 · The pump has to be heated to prevent polymer from solidifying in the gear pump during a process upset and process start-up. In normal operation, shear heat is generated by the rotating gears, minimizing the heat required. Unlike an extruder, the gear pump has no external air or water cooling to remove excess heat.
External gear pumps operating with non-Newtonian fluids: …
2018年6月1日 · The pump used as reference in this study is 30 cc/rev external gear pump with 22 teeth on each gear (of radius 25 mm) produced by Zenith. This particular model (Zenith 9000 series) is chosen since it is expressly indicated as suitable for operation with various non-Newtonian fluids like plastics, polymers, paints etc. and industries indeed use ...
Non-stationary CFD Simulation of a Gear Pump - ScienceDirect
2017年1月1日 · The discharge part is ideally sealed. In the model we created individual zones for each material used and named the surfaces respective thereof. The figure shows the surface mesh. Fig. 2. a) Suction side of the pump (volumes with gear tolerance against the housing are marked ) b) Pump pressure side (ideally sealed gear against the housing).
Design and Manufacture of Miniature Hydraulic Gear Pump for Bio …
2018年1月1日 · Gear Pump A basic gear pump consists of a set of meshed gears, a case or housing to enclose the gears, and two cover plates that covers the ends of the gears. Each gear is mounted on shaft which is supported on bearings in the end covers. The drive shaft is coupled to the drive motor. The inlet and delivery ports are provided.
Elastodynamic analysis of a gear pump. Part I: Pressure distribution ...
2010年10月1日 · This section presents some simulation results about the gear SEP, the pressure distribution and the pressure forces and torques, concerning a pump with twin gears of 12 teeth, module of 1.15 mm, pressure angle in working condition of 27.727° and relief groove dimension of 2.9 mm; other pump parameters are reported in Table 1.
Modelling dynamic behaviour and noise generation in gear pumps ...
2014年3月1日 · The paper presents a methodology for noise and vibration analysis of gear pumps and its application to an external gear pump for automotive applications. The methodology addresses the use of a combined numerical model and experimental analyses. The combined model includes a lumped-parameter model, a finite-element model and a boundary-element ...
The advantages of magnetically driven gear pumps - ScienceDirect
2004年11月1日 · The gear pump provides flow by first sealing off a gear mesh. As the gears rotate and the gear teeth open up, they create an expanding volume and a low pressure area. The low pressure area induces the fluid to enter the pump inlet where it is trapped between the gear teeth and cavity wall.
A numerical study of an external gear pump operating under …
2022年12月12日 · To anticipate pump performance, a three-dimensional CFD approach was devised and deployed in terms of pressure field, velocity vectors, and the flow pattern to understand pump flow. The primary goal of this research is to examine how the number of teeth affects how a gear pump operates and to show the pressure profile in each intermittent teeth ...
Retrofitting high-pressure polymer gear pumps for a cost-effective ...
2004年8月1日 · The new Maag Pump Systems' MR-series polymer pumps, (Figure 9), can be used to replace Maag's older polymer high-pressure gear pump models. Even larger vacorex gear pump sizes VX-140 up to VX-280 can be retrofitted with new technology options. Maag Pump Systems can also change-out an existing vacorex gear pump to accommodate the new …
Wear in external gear pumps: A simplified model - ScienceDirect
1994年3月1日 · The alloy tool steel gear pump was designed to replace an existing pump made of grey cast iron to increase the service life to 7–8 years from 4–5 years. However, the new pump, used for dispensing hot adhesive polymer at 170 °C and 8 bar pressure, was damaged due to pitting corrosion within one year of service.