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    Discussion: Spur Gear & Helical Gears: Cutaway Model

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    Ranu Games
    The document discusses and compares different types of gear systems, including spur gears, helical gears, worm gears, planetary gears, and continuously variable transmissions (CVTs). Spur gears transmit power between parallel shafts but have limitations on center distance and produce noise. Helical gears can transmit power between non-parallel shafts and operate more quietly than spur gears. Worm gears can achieve high speed reductions but have low efficiency. Planetary gears can achieve high gear ratios in a compact space but are complex and expensive. CVTs provide stepless acceleration and improved fuel efficiency over traditional automatic transmissions.

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    Discussion: Spur Gear & Helical Gears: Cutaway Model

    Uploaded by

    Ranu Games
    40 views6 pages
    The document discusses and compares different types of gear systems, including spur gears, helical gears, worm gears, planetary gears, and continuously variable transmissions (CVTs). Spur gears transmit power between parallel shafts but have limitations on center distance and produce noise. Helical gears can transmit power between non-parallel shafts and operate more quietly than spur gears. Worm gears can achieve high speed reductions but have low efficiency. Planetary gears can achieve high gear ratios in a compact space but are complex and expensive. CVTs provide stepless acceleration and improved fuel efficiency over traditional automatic transmissions.

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    The document discusses and compares different types of gear systems, including spur gears, helical gears, worm gears, planetary gears, and continuously variable transmissions (CVTs). Spur gears transmit power between parallel shafts but have limitations on center distance and produce noise. Helical gears can transmit power between non-parallel shafts and operate more quietly than spur gears. Worm gears can achieve high speed reductions but have low efficiency. Planetary gears can achieve high gear ratios in a compact space but are complex and expensive. CVTs provide stepless acceleration and improved fuel efficiency over traditional automatic transmissions.

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    40 views6 pages

    Discussion: Spur Gear & Helical Gears: Cutaway Model

    Uploaded by

    Ranu Games
    The document discusses and compares different types of gear systems, including spur gears, helical gears, worm gears, planetary gears, and continuously variable transmissions (CVTs). Spur gears transmit power between parallel shafts but have limitations on center distance and produce noise. Helical gears can transmit power between non-parallel shafts and operate more quietly than spur gears. Worm gears can achieve high speed reductions but have low efficiency. Planetary gears can achieve high gear ratios in a compact space but are complex and expensive. CVTs provide stepless acceleration and improved fuel efficiency over traditional automatic transmissions.

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    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 6

    DISCUSSION

    Spur gear & Helical gears: Cutaway model

    Spur gear:
    This gear system I the easiest and visualize gear system to transmit power to
    parallel shafts. Also this is the common gear system which used in many
    mechanical devices. This gear system commonly used in high torque low speed
    drivers.

    Advantages
     Transmission efficiency is high than other gear system.
     Straightforward design.
     It has constant velocity ratio.
     Reliability
     Easy to assemble.

    Disadvantages
     Limited center distance
     Noise is high
     Spur gears take significant stress.
    Applications
     Used in vehicle engines.
     Used in aircraft engine
     Used in railway trains.

    Helical gears
    Helical Is most common used gear system in transmission. They also generate
    large amount of thrust and use bearing to help support the thrust and use
    bearing to help support the thrust load. Helical gears can be used to adjust the
    rotating angle by 90deg. When mounted perpendicular shafts.

    Advantages
     Silent operation.
     Non parallel shaft can handle.
     Strength is higher than the spur gear.
    Disadvantages
     There Is a greater degree of friction between the teeth.
     The helical gear efficiency is lower than the other gear systems.
     Higher manufacturing cost than the spur gear.
     Thrust which results along the gear axis.
    Application
     Vehicle gear box.
     Machine tools.
     Used in fertilizer industries and printing industries.
     Used in steel rolling mills.
     used in textile industries ,plastic industries, elevators, blowers and
    compressor etc.

    Worm gear model


    This gear system consists of two elements those are worm screw and worm
    wheel. A worm drive can reduce rotational speed or transmit higher torque.
    This gear system can transfer motion in 90 degrees. Also this gear system can
    rotate only one direction gear will lock for other direction motions.

    Advantages
     Higher speed reduction
     Worm and worm gear operate silently
     It has self locking it will restrict the reverse movement.
    Disadvantages
     Manufacturing cost Is high
     Cost of raw material to manufacture the worm gear is high.
     Efficiency is low.
     It has heavy power losses.
    How cans worm gear is reversible
    To get reversible rotating motion it Is necessary to connect ac motor to the
    worm of the worm and worm gear system.

    Planetary gear model


    The planetary gear system consists of mainly three components:
     The sun gear
     The planet gear and the planet gear’s carrier
     The ring gear
    Each of these three components can be the input, the output or can be held
    stationery. Choosing which piece plays which role determines the gear ratio for
    the greatest.
    Advantages
     This gear system is used to get higher gear ratio in compact space.
     Planetary gear has light weight as compared to traditional gear systems.
     Power transmission efficiency will be quiet good.
     It has higher torque transmission capability and will have a lower inertia.
     Driven and driver equipment can arrange in same gear system.
     It has higher stability.
    Disadvantages
     Cost of planetary gear system is higher than the normal gear system.
     Designing and manufacturing is very complex.
     Determination of efficiency Is very difficult.
     Gearing should be accurate.
     Some of these gearing system make noise.
     To avoid any additional gearing, driver and driven members must be
    concentric.

    Application
     Used in clocks.
     Lunar calendar
     Car mirrors
     toys
    Continues variable transmission (CVT) model

    A continuous variable transmission, or CVT, is a type of automatic


    transmission that provides more useable power, better fuel economy and a
    smoother driving experience than a traditional automatic transmission.
    Advantages
     Compact design.
     Stepless acceleration.
     Fuel efficiency.
    Disadvantages
     Cost and maintains is hard
     Different driving experience.
    Applications
     A high power/density belt.
     A set of Cone pulleys.
     Hydraulic Actuator.
     Mechanical torque sensor.
     Microprocessor.
     Torque Converter or Multi-layered clutch (replacing conventional
    clutches).

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