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    Hydraulic Power



    Hydraulic Power
    Hydraulic Power
    Hydraulic Power
    Hydraulic Power
    p I H p I H p I H

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    Hydraulic power is generated through a combination of oil flow and pressure. Oil flow and pressure is created from a hydraulic pump and transmitted through hoses or tubes, via control valves, to the hydraulic motor or cylinder that will do the work.

    One of the key advantages of hydraulic systems is to be able to transmit large amounts of power from a remote power source (electric motor or internal combustion engine) to a compact actuator.

    This type of power transmission is clearly demonstrated on excavators where the hydraulic cylinders are attached to the boom and the diesel engine and
    pumps are mounted behind the cab. All functions are controllable by the operator in the cab.

    Hydraulic Power Density

    Hydraulic pumps, motors and cylinders are very power dense. This means that the amount of power they can absorb and transmit from a compact envelope give designers of machines the flexibility to locate the pumps and actuators in the most advantageous position.

    As shown to the right, if you compare the size and weight of a diesel engine, electric motor and hydraulic motor each capable of delivering 100kW of power, the hydraulic motor is the most compact. It is also the most robust, suitable for hazardous environments and sealed against water and dust ingress.

    Hydraulic Power Calculations

    Theoretical hydraulic power is calculated as :

    Hydraulic Power (Watts) = Pressure (Pa) x Flow (m3/s)

    In order to calculate hydraulic power in the units we normally use in hydraulics, this formula is modified to:

    Hydraulic Power (kW) = Pressure (Bar) x Flow (l/min) / 600

    Because transmitting hydraulic power is not 100% efficient, the inefficiencies of the system have to be taken into account. Depending on the hydraulic circuit design and components used the amount of usable power at the actuator can be 50-80% of the input power.

    Hydraulic Power Control

    In order to control the transmission of hydraulic power from the pump to the actuators a range of control valves are used. The speed of a motor or cylinder and the torque or force that can be generated is infinitely controllable using directional, flow and pressure control valves.

    Even though hydraulic systems have power losses which result in heat generation, the ability to smoothly transmit large amounts of power from a prime mover to multiple actuators means hydraulics are found in almost every industry and predominant in mobile equipment.

    For more information on hydraulic power talk with one of our sales engineers by calling +61 8 8984 4939 or drop us an email

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    Winnellie Group
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    Jutta Tillery
    Jutta Tillery
    14:34 02 Apr 22
    Excellent customer service, kept us updated throughout the delivery process really looking forward to doing business with Waltan Tools again soon
    Daniel and Scott
    Daniel and Scott
    12:02 29 Jun 21
    We have done business with Winnellie Hydraulics on numerous occasions and find them to always be nothing but professional, honest and reliable.Their customer service is excellent and they are always a pleasure to work with. We would highly recommend Winnellie Hydraulics and we look forward to continuing business with Max and the team in the up and coming future.
    Damien Pedersen
    Damien Pedersen
    06:23 15 Feb 21
    Winnellie Hydraulics are up most professional and I am always impressed with the service offered and provided. The team at Winnellie Hydraulics are highly skilled, innovative and ever reliable. They continue to be the Territory’s leading service specialists within the fields of the hydraulic and pneumatic services and solutions. The team have a broad range of knowledge in hydraulic, pneumatic, hose management and products across a extensive range of divisions. The team at Winnellie Hydraulics are easy to work with and really appreciate their customers and strive for continuous business improvement.
    Rob North
    Rob North
    07:53 10 Feb 21
    Efficient, professional and dedicated. The team at Winnellie Hydraulics are a pleasure to work with and are customer service specialists.Max and the team have taken on many challenges to assist with emergent scopes at our onshore facility in Darwin. They go above and beyond to meet the timeline required without missing a beat on quality.I highly recommend dealing with them and look forward to future business.Thanks guys
    Sonia Harvey
    Sonia Harvey
    05:25 08 Feb 21
    The team at Winnellie Hydraulics are customer service specialists! They certainly go above and beyond to meet the needs of customers and are a great local service and supply business. I highly recommend dealing with them.
    Darren Steele
    Darren Steele
    02:59 07 Feb 21
    For all your Hydraulic & Pneumatic needs, Winnellie Hydraulics has you covered.Max and the team run a great operation that supports the Oil & Gas and Mining industries.With great brands supporting them, they are truly the one stop shop for all your engineering needs.
    Dipak Nand
    Dipak Nand
    23:06 04 Feb 21
    The team at Winnellie hydraulics, is great to work with, they understand our priority and service delivery to our Defence clients, No job too small or big and delivering of high quality products and service. Also really easy to deal with in regards to faults/ warranty and SME service . Highly recommended to use.
    Ben Tilbrook
    Ben Tilbrook
    07:35 04 Feb 21
    Outstanding commitment to their customers, in my experience there isn’t anything that is too hard for this mob. Always prepared to find solutions to their customers now matter how big or small the request. A great family business who take pride in providing product and service.
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