Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 9 views

    HYDRAULIC LIFTS in EME

    Uploaded by

    nikhathafeera.154
    Elements of mechanical engineering

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    HYDRAULIC LIFTS in EME

    Uploaded by

    nikhathafeera.154
    9 views13 pages
    Elements of mechanical engineering

    Copyright

    © © All Rights Reserved

    Available Formats

    DOCX, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    Elements of mechanical engineering

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    9 views13 pages

    HYDRAULIC LIFTS in EME

    Uploaded by

    nikhathafeera.154
    Elements of mechanical engineering

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 13

    B.M.

    S COLLEGE OF ENGINEERING
    (Autonomous college under VTU, Belgaum)
    Bull temple road, Basavanagudi, Bengaluru-56009
    2023-24

    Elements of mechanical engineering


    Experiential Learning
    By
    Bhavana Kota
    USN: 1BM23IM010

    Submitted to
    Dr. Vardhaman S.M
    Professor
    Mechanical Department
    What is a Hydraulic Lift?
    A hydraulic lift is a device for moving objects using
    force created by pressure on a liquid inside a cylinder
    that moves a piston upward. Incompressible oil is
    pumped into the cylinder, which forces the piston
    upward. When a valve opens to release the oil, the
    piston lowers by gravitational force.

    The principle for hydraulic lifts is based on Pascal‘s


    law for generating force or motion, which states that
    pressure change on an incompressible liquid in a
    confined space is passed equally throughout the
    liquid in all directions.

    The concept of Pascal‘s law and its application to


    hydraulics can be seen in the example below, where a
    small amount of force is applied to an incompressible
    liquid on the left to create a large amount of force on
    the right.
    Hydraulic systems are used for precision control of
    large force applications, are economical, and make
    excellent use of energy resources.

    How do Hydraulic Lifts Work?


    A hydraulic system works by applying force at one
    point to an incompressible liquid, which sends force
    to a second point. The process involves two pistons
    that are connected by an oil filled pipe.

    The image below is a representation of the two


    pistons and how they are connected by a pipe.
    The diagram below represents a simple version of the
    working mechanism of a hydraulic device. The handle
    on the right moves the incompressible oil, under
    pressure, from the reservoir to the high pressure
    chamber in the middle of the diagram. The ram
    moves up as the oil is pumped in.

    Force Generated
    The force generated in a hydraulic system depends
    on the size of the pistons. If the smaller of the two
    pistons is two inches and the larger piston is six
    inches, or three times as large, the amount of force
    created will be nine times greater than the amount of
    force from the smaller piston. One hundred pounds
    of force by a small piston will be able to lift 900
    pounds.

    In this diagram, the piston on the left has a one


    pound load and an area of one inch. When it moves
    down ten inches, it is able to move the ten pound
    load on the piston on the right.

    Parts of a Hydraulic System

    The purposes of hydraulic systems widely vary, but


    the principles of how hydraulic systems work and
    their components remain the same for all
    applications. The most significant part of a hydraulic
    system is the fluid or liquid. The laws of physics
    dictate that the pressure on the fluid will remain
    unchanged as it is transmitted across a hydraulic
    system. Below is an explanation of each part of a
    hydraulic system.

    Hydraulic Circuits
    Hydraulic Circuits control the flow and pressure of
    the liquid in the system. The image below shows all
    of the different parts of a hydraulic circuit.

    Hydraulic Pump
    Hydraulic Pump converts mechanical power into
    hydraulic energy. Hydraulic pumps create a vacuum
    at the pump inlet, which forces liquid from the
    reservoir into the inlet line and out to the outlet to
    the hydraulic system.

    Hydraulic Motor
    Hydraulic Motor is an actuator to convert hydraulic
    pressure into torque and rotation. It takes the
    pressure and flow of the hydraulic energy and
    changes it into rotational mechanical energy, similar
    to a linear actuator. The pump sends hydraulic
    energy into the system, where it pushes the hydraulic
    motor.
    Hydraulic Cylinder

    Hydraulic Cylinder converts the energy in the

    hydraulic fluid into force and initiates the pressure in


    the fluid that is controlled by the hydraulic motor.
    Hydraulic Pistons
    Hydraulic Pistons are moved linearly by fluid
    pressure. Axial designs have a number of pistons
    arranged in a circular pattern in a rotating housing.

    Hydraulic Fluids
    Hydraulic Fluids transfer power in a hydraulic system.
    Most hydraulic fluids are mineral oil or water. The first
    hydraulic fluid was water before mineral oil was
    introduced in the twentieth century. Glycol ether,
    organophosphate ester, polyalphaolefin, propylene
    glycol, and silicone oil are used for high temperature
    applications and fire resistance.

    You might also like