30-04-2012, 03:46 PM
FOOT PUMP HYDRAULIC LIFT TABLE
hydraulift pump.docx (Size: 802.78 KB / Downloads: 130)
INTRODUCTION
Machine element is a course that develops in us the understanding of the fundamental principles required for the selection of the individual elements of which a machine is composed. Basing on this understanding, we will carry out a study on a hydraulic lift pump.
A hydraulic lift pump is an elevator or lift operated using fluid technology. The hydraulic mechanism helps in the lifting or moving objects with the pressure generated on liquid in a piston and it is this pressure or force that does the lifting job. Hydraulic lift pumps are used in a number of industrial applications. They are mechanical devices used to lift heavy objects, automobiles, airplanes, cars, dirt and shipping containers; they are also used in the construction industry for moving and lifting heavy objects in the construction sites.
I-EQUIPMENTS
This part of the report will present a theoretical analysis of different parts of the lift. In addition, this will describe the role or function of each part and discuss the type of material suitable for making that part.
Properties and materials
This element is expected to endure failure resulting from static loading. To facilitate the operation conditions, the element should be made from light but hard material. For these reasons, we will choose aluminum alloys for the construction of this part.
Means of manufacturing
This is a prismatic shape, therefore it can be fabricated on a milling machine if the length or width is not too large, and otherwise it can be casted when dimensions are very large.
DESIGN PROCEDURE
The design of an object involves a mathematical study for its critical sections by taking into account many factors such as stress concentration, maximum loading, failure criteria, etc.
In this design section, we will conform to the theories of failure analysis and factor of safety in order to make our design safe.
CONCLUSION
The report has introduced a foot pump hydraulic lift by presenting its equipments, its design and the assembly of its parts. Furthermore, the report has stated the advantage and limitations of the apparatus.
As we see the report features only formulas, this is due to the unknown values of some parameters such as pressure P, density of the fluid, which we were not able to determine as they are determined experimentally or by using special devices. So, the formulas derived are general expressions which can be applied on any devices similar the hydraulic lift. In addition, despite some difficulties in finding information about the device, our study was a successful one since we have end up with the basic knowledge about the way hydraulic lift foot pump works and the steps involved for the design of its parts.