The development of this lateral CCD is based on the technical specifications for the hanging air trains. This document describes the main technical parameters of the lateral CCD, structure design , key points, and attentions etc., makes the design calculations on the dynamic part---spring, thus deducing...

To analyse the effect of outflow modes during making micro-dimples using the modified through-mask electrochemical machining with filled inter-electrode gap, some investigations were carried out numerically and experimentally. The studies showed that, the reflux discharging mode (RDM), which allows most...

In PBGA package, solder joint provides not only mechanical support, electrical conduction and thermal conduction effect, but also withstands frequent thermal, mechanical, electrical loads in the high temperature operation of the electronic device. Thus, solder joint quality is directly related to PGBA...

Slewing bearings generally consist of the rotational connection between two substructures for combined load at very low speeds. Although there are a large number of traditional or modern techniques widely used in slewing bearing, they may not be able to meet the requirements of bearing industry precisely...

The grouted clamps will strengthen the offshore platform jackets which have fragile nodes and the damaged structure underwater. Theoretical analysis of buckling on the jacket was done with buckling theory under uniform axial compression and the method of finite element analysis under the condition of...

It is obvious that mechanical stripping is unable to meet the requirements for the stripping of extremely thin wires. Laser stripping has been widely used for its easy integration with electromechanical equipment and high controllability. Currently most laser stripping devices have to utilize double...

Transmission efficiency is a key characteristic for gear box, a test system is set up for gear box's measurement. But in the test process, there may have some wrong test results by using ideal mathematic formula which is based on the law of conservation of energy. By checking the mechanical structure...

Aiming at the dynamic question of the belt conveyor, based on the Kelvin-Voigt viscoelastic constitutive law the longitudinal dynamic governing equation of the viscoelastic conveyor belt was established. The generalized coordinate method was adopted to solve dynamic displacement and dynamic tension of...

An idea of controlling or restricting axial movement of the rotor system using magnetic force was proposed in this paper. A device named Magnetic Balancing Disc(MBD) was developed which could play a role better than general fluid balance disc in certain compressor. Basis principle of magnetic balancing...

There is high market demand for new energy vehicles. And the driving system of new energy bus gets improved day by day. Within the performance studies on core components such as electric machinery, controller, battery and gearbox and within the vehicle system performance matching and conformity, it is...

Stiffness and damping properties of the magnetic bearings are mainly determined bythe parameters of system controller, both of which are the function of rotor frequency. In the system of magneticsuspensionflywheel (MSFW), the rotor applied has a large moment of inertia ratio, resulting in a strong gyroscopic...

In this paper, the development of tunnel section cutting equipment is studied in combination with the actual production. The paper introduces the basic functions, research ideas and design of the new grooving machine. The working process of drilling and grooving work of the working mechanism and the...

Considering their particular geometric structures, the stator and rotor cans in canned motor reactor coolant pump are assumed to be elastic coaxial cylindrical shells in this paper. An ideal, incompressible, swirling fluid flows the annulus between the inner shell (can) and the outer shell (can). Thin...

The flow field characteristics of self balanced multi-stage centrifugal pump were analyzed based on FLUENT. Reynolds-averaged Navier Stokes equations and standardÿk- ÿmodel areÿadoptedÿto calculateÿthe pressure and velocity distribution of the flow field in the impeller and the guide vane under three...

The paper studied the influence of processing parameters on the foam structure based on numerical simulation of tensile spline. Using CO2 and N2, single factor experiment method was employed to perform the experiments. In the study, volume filled at start of foaming, initial bubble radius, volume filled...

In the work, the universal driving joint with the traditional series composite mechanical structure has the friction and wear, which make the moving parts hot, and then causes the static and dynamic performance of the joint worse. So based on the Integration of multi technology domains, such as motors,...

In recent years, with the development of construction machinery technology, the controlling requirement for its hydraulic system has become more and more strict. The bad working environments did harm for the hydraulic system, so people payed more attention on preventing hydraulic system from invalid...

The paper developed a new type of 4-DOF mechanism design for reflectors in vacuum, which had the ability of assembling the reflector stably and realizing 4-DOF movement (one-translation and three-rotation) of the reflector in vacuum by adjustments outside the vacuum. Then the equations of kinematic analysis...

When the -Re_ transition model is used to calculate the aerodynamic performance of the wind turbine airfoils, the SIMPLE algorithm is usually applied to solve the equation of speed and pressure for airfoil surface. Consequently the precision of the results by using SIMPLE algorithm is comparatively low....

In order to guarantee structural safety of stereo garage and control its cost of construction, the key components, such as supporting frame and cylinder, were optimized by the ANSYS. Based on the static analysis of ANSYS, the results show that the maximum deformation of supporting frame is mainly distributed...

The throwing motion of materials in the rotary dryer is the key step to dry off. An estimation model of solid material transport was established. The motion rule about the lifted materials was studied. The numerical model was proposed according to the space motion of materials and mathematical calculation....

In this paper, a new type of wire-driven lumbar parallel rehabilitation device is designed based on the wire-driven parallel robot to realize the purpose of rehabilitation training the lumbar of the patient. On the basis of designing the mechanical structure, the kinematics of the device is analysed...

The research presents a data generation method for layer slice in FDM additive manufacturing, which solves the intersection between surface STL file and slicing plane and gets the slicing counter surface data. In the research it designs the layer slicing algorithm and tests it in a FDM machine to fabricate...

In this paper, the criterions of module division are established, and the calculation formula of the number of modules partitioning schemes under two conditions is given, and the logic relation between modules is analyzed. On the basis of the research, a product structure attribute mapping method applied...

As one of new generation equipment in China, the main task of one type infantry fighting vehicle is to complete the breakthrough in the battle accompanying the main tank. It has not only the stronger firepower but equipped with auto-loader that is able to raise the fire rate and shrink the outer shape...

The composite packaging bag is widespreadÿused in packagingÿindustry. In the past, the production of it is mostly done by manual, so manufacturer want to use automated machinery to improve efficiency and reduce intensityÿofÿlabor. The pneumatic and vacuum system as a important part of this product need...

2K-H planetary gear is a commonly seen gear structure, but it has proven troublesome to match its tooth numbers through hand computation. This paper introduces a calculation method for the 2K-H planetary gear and develops a software written with the use of computer software technology for matching gear...

Aiming at the problem that the study of vehicle door lightweight is mostly the single-objective optimization, and do not take unconcern factors into consideration, the vehicle door lightweight research of multi-objective optimization and robustness analysis is conducted. Firstly, the sensitivity analysis...

The frontal impact waveform is of great significance for occupant protection and automobile safety. According to the structure of the front engine room of the vehicle, a SUV frontal crash waveform is simplified by the simulation. The sensitivity analysis of the waveform characteristic parameters was...

This paper analyses the influence of air pressure regarding the precise mass measuring process. The stability of air pressure to the mass determination process is discussed experimentally using the new M-one mass comparator. Due to the change of air pressure, air flow and vibration with regard to the...

Full scale aircraft drop test was an effective method to assess dynamic loads and response in indoor environment. Wing lift simulation with drop testing machine is to impose a dynamic load equaling the landing weight on the aircraft, so as to completely simulate the landing condition. The choice of loading...