Meshing Force Analysis Of The Reciprocating Pump Drived By TOP Worm Drive

Based on a certain type of marine reciprocating bilge pump,this paper make a study of low vibration and noise designing. This type of bilge pump powers by three-phase asynchronous motor, drives by the crank connecting rod mechanism, reduces the speed with TOP worm drive, and takes the form of two-cylinder double-acting hydraulic. Low vibration and noise designing is very complicated for complex transmission system. The main content of this paper include:Dynamics analysis model of shafting is established, and the power transfer process in the shafting is analyzed based on the hydraulic cylinder pressure. According to the statics analysis method, the force of the crankshaft bearing and worm bearing are calculated, decomposed in two perpendicular direction, and two decomposing force are calculated respectively on the relationship between along with hydraulic cylinder pressure. The relationship between resistance moment in TOP worm drive and the hydraulic cylinder pressure is also analyzed.Using the three-dimensional modeling software UG, TOP worm drive of 3-D model is established. TOP worm drive is short for planar double-enveloping toroid worm drive,and its tooth surface is the space complex surface. In this paper, the accurate 3-d model of worm is established based on the existing the worm tooth surface equation, and the 3-d model of worm gear is established by the method of virtual machining, and the virtual assembly of worm gear and worm is completed.In Adams/View, the virtual prototype model of TOP worm drive is established, and the dynamic meshing force of worm gear and worm drive is calculated by the impact function method (Impact), and the frequency domain analysis is carried on, getting the amplitude of meshing force in the meshing frequency and multiplication frequency. The influence of the installation error and dynamic resistance moment on the meshing force is analyzed.The finite element model of pumps is established,and the modal analysis is carried on.The boundary conditions of the finite element are revised according to the modal experiment of the pump to ensure the correctness of the finite element model. The meshing force in the correct installation state apply on the finite element model to calculate the acceleration responses of the pump foot, and the acceleration response test of pump foot is carried on.