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    Brisbane / PNG

    Hydraulic Pump



    Hydraulic Pump
    Hydraulic Pump –
    Gear category
    Hydraulic Pump –
    Vane category
    Hydraulic Pump –
    Piston category

    Hydraulic Pump – Gear category

    Looking to buy a hydraulic pump or spare parts? Browse our range of pumps here or give us a
    call now on +61 8 8984 4939.

    Consist essentially of two intermeshing toothed gears enclosed in a common housing. A shaft, the drive shaft, extends beyond the housing. This shaft is attached to one of the gears which, when it is turned by the shaft, drives the second gear. The hydraulic fluid is trapped in the gaps between the gear teeth and propelled along the inside of the housing from the suction inlet port to the pressure outlet port. The vacuum required in the suction chamber for drawing in the fluid is generated by the increase in volume which results when one of the gear teeth and its mating tooth space go out of mesh. In the pressure chamber, the teeth and their mating spaces come into mesh again and force the fluid out through the outlet port. The delivery flow is subject to pulsation effects which is one of the reason gear hydraulic pump are noisier than their vane and piston counterparts.

    Hydraulic Pump – Vane category

    Looking to buy a hydraulic pump or spare parts? Browse our range of pumps here or give us a
    call now on +61 8 8984 4939.

    Fixed displacement: In this type of hydraulic pump, vanes are fitted in radial slots around the periphery of the driven hydraulic pump rotor. When the rotor turns, these vanes are forced outwards against the surface of the cam ring due to centrifugal force and also due to the fact that they are subject to pressure from within. The cam ring is in the form of an ellipse, with the result that two inlet (suction) chambers are formed and two outlet (pressure) chambers. The suction chambers are diametrically opposite to each other as are the pressure chambers. This means that the radial bearing forces of the rotor are compensated for. The separation of suction and pressure chambers (better known as “kidneys”) is by means of control slots in the port plates fitted on the end faces of the rotor. From these plates, passages lead in the housing to the pressure and suction ports.

    Hydraulic Pump – Piston category

    Axial piston pumps are displacement machines in which the pistons are arranged in parallel to the axis of rotation of a cylinder barrel. The conversion of the rotating drive motion into a backwards and forwards movement of the pistons takes place in accordance with 3 main principles. These are described in the following: All versions are suitable for both pump and motor operation.

    Swash-Plate Hydraulic Pump:
    In this version, the cylinder barrel is driven and, as a result, the pistons which are located and guided in the barrel rotate with it. In the axial direction, the movement of the pistons is determined by the swash-plate which is attached to the pump housing. This swash-plate can be pivoted with reference to the vertical axis passing through the drive shaft. The hydraulic pump displacement volume is determined by the angle at which the swash-plate is inclined from the vertical. This principle makes it possible for the hydraulic pump to be reversible. In the case of constant-capacity hydraulic pump and motors, the swash-plate angle is not variable. During the suction phase, the pistons move out of the barrel and are forced against the swash plate by a special retaining plate. During the pressure phase, the swash plate forces the pistons back into the barrel. The rotating pistons move in an elliptical orbit against the stationary swash plate. Friction is held to an absolute minimum by slipper pads or axial bearings. A form of slot control is used to ensure that the delivery flow from the individual pistons is in the same direction, and that the piston ports are connected to the pressure or suction connection at the right moment. The slot control is located in a stationary control plate against which the cylinder barrel rotates with its piston port face.

    Bent Axis Hydraulic Pump:
    With this type of hydraulic pump, the cylinder barrel is driven by the pistons which in turn are themselves driven by the drive flange. The cylinder barrel is located and guided at its periphery by either a centre pin or a needle bearing, and is pivoted with reference to the shaft horizontal axis. The displacement volume changes in accordance with this pivot angle. Reversible hydraulic pump can be realised using this principle.

    The pistons and the drive flange are connected by means of a ball·joint connection. This pulls out the pistons during the suction phase and forces them back into the piston bores in the cylinder during the pressure phase. A further knuckle joint is necessary between the actual pistons themselves and the ball-joint connection. (Compensation of the elliptical orbit and the circular orbit.) The separation of the suction and pressure sides is by means of a slot control as in the bent-axis hydraulic pump. The control plate, which can be either flat or spherical depending upon the particular design, pivots together with the cylinder barrel. In other words, the pressure connection must be routed through the swivel bearing. Oil is drawn in during the suction phase directly from the hydraulic pump chamber (this applies for versions with only one direction of delivery).

    Wobble-Plate Hydraulic Pump:
    With this type of hydraulic pump, a so-called wobble plate is driven by the input or drive shaft. This plate transfers its axial movement to the non·rotating pistons. Springs force the pistons against the wobble plate. A thrust bearing transfers the pressure forces between the pistons and the wobble plate which are moving against each other. Valves can be used to ensure that the delivery flow from the individual pistons is in the same direction. A slot-type control at the individual pistons can also be used for this purpose. The angle of tilt of the wobble plate cannot be varied in this pump. This means that the displacement is constant.

    Winnellie Group
    Based on 23 reviews
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    Jutta TilleryJutta 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 ScottDaniel 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 PedersenDamien 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 NorthRob 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 HarveySonia 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 SteeleDarren 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 NandDipak 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.
    Darren UptonDarren Upton
    22:54 04 Feb 21
    Winnellie Hydraulics are a Parker PPD for the NT which means they have full access to all Parkers Hannifin products & our local Engineering team in Australia who can work with Winnellie on any projects where clients needs are meet using Parkers products & their insulation experience
    Ben TilbrookBen 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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