MCH Hydraulics Ltd

07795 387231

info@mchhydraulics.co.uk

  • Home
  • About Us
  • Hydraulic Services
    • Bespoke Power Packs
    • On Site Data Testing Services
    • Bespoke Systems and Hydraulic Flushing Rigs
    • Service And Maintenance
    • Hose And Fittings
    • Pipe Work Installations
    • Hydraulic Components, System Design & Building
  • News
  • Contact Us
You are here: Home / Maintenance / Types of Hydraulic Pumps

April 12, 2022 by Mark

Types of Hydraulic Pumps

This concise guide briefly outlines some of the main types of hydraulic pumps and their various uses across different industries and applications. It includes whether the hydraulic pump is fixed or variable displacement and other helpful infomation such as expected noise levels, ease of maintenance and other features.

Gear Hydraulic pump

This is the most common type of hydraulic pump and one of the easiest to service and cheapest to replace. These fixed displacement hydraulic pumps and are usually used in open centre hydraulic systems. Gear pumps come in two varieties; internal and external and subvarieties include straight cut and helical spur gears which are commonly used where noise reduction is necessary. If increased pressure is required (these are usually around the 250bar mark) then cast iron can increase up to around 320bar.

Gerotor/Internal Hydraulic Pump

These quiet hydraulic pumps are often used in the automotive industry. They have one external gear rotor and one internal gear which is sealed to the off-centre rotor making the volume change constantly. This is not a hydraulic pump for high pressure applications.

Screw Hydraulic Pumps

Another quiet type of hydraulic pump, the screw pump, consists of 2 helical screws one of which drives at one end. They share common housing in which the fluid passes through only one way. It is therefore a fixed displacement output hydraulic pump. A reliable although low-efficiency pump when used with a high viscosity fluid.

Bent Axis Hydraulic Pump

Commonly found in mobile applications such as plant machinery. Bent axis pumps can be fixed or variable displacement hydraulic pumps thanks to the thrust plate which has a variable angle. This makes the pistons that are attached to the rotating cylinder variable as well and therefore can vary the amount of fluid that is moved during each turn.

Axial Piston Pumps

Similar to the bent axis pump but more compact the axial piston hydraulic pump is highly efficient and economical to produce and therefore maintain. There are a wide variety of options when it comes to the ability to have control over the power, pressure and flow making it suitable for a huge variety of machines and applications.

Radial Piston Pumps

Commonly used in high-pressure hydraulic systems radial piston pumps can be either fixed or variable displacement pumps. When it is variable this is often achieved with adjustment screws or a piston which alters the eccentricity of the ring. The distance between the eccentric ring and the centre line of the shaft changes as the central shaft rotates therefore the radial pistons, of which there is an odd number, are taken through a cycle of pressure and suction.

Vane Pumps

Another hydraulic pump uses an eccentric ring but this time instead of pistons sliding vanes are arranged around the central rotating shaft. The vanes then create the seal required. Often used in hydraulic tools which don’t require much pressure (140bar maximum) they are both reliable and quiet.

If you need more information about the different types of hydraulic pumps that we offer and service please contact us at MCH Hydraulics and our team of friendly and experienced hydraulic engineers will be happy to offer their expert advice or book you in for a service.

Filed Under: Maintenance Tagged With: Systems

Give us a call now for details on all our services and for your FREE Quote. 07795 387231
Give us a call now for details on all our services and for your FREE Quote. 07795 387231

EMAIL NEWSLETTER

Sign up to receive email updates and to hear what's going on with us!

Facebook

Company Profile

MCH Hydraulics are a leading provider of hydraulic systems, components, repairs and maintenance in Derby. We pride ourselves on our extensive knowledge and bespoke service, enabling you to get the system you need, tailored specifically to your requirements.

Read more about us here.

Opening Times

Unit 2, Bankfields Farm, Derby Road, Draycott, Derby, Derbyshire, DE72 3NX

Tel: 07795 387231
Email: info@mchhydraulics.co.uk

Mon – Fri: 7am – 7pm
Sat – Sun: Closed

Follow me on Twitter

My Tweets

Based in Derby, MCH work across Derbyshire, Nottingham and Leicester.

  • About Us
  • Cookie Policy
  • Privacy Policy
  • Contact Us
© 2016-2020 MCH Hydraulics Ltd
Website design by: Orkis Media