Design World

  • Home
  • Technologies
    • 3D CAD
    • Electronics • electrical
    • Fastening & Joining
    • Factory automation
    • Linear Motion
    • Motion Control
    • Test & Measurement
    • Sensors
    • Fluid power
  • Learn
    • Ebooks / Tech Tips
    • Engineering Week
    • Future of Design Engineering
    • MC² Motion Control Classrooms
    • Podcasts
    • Videos
    • Webinars
  • LEAP AWARDS
  • Leadership
    • 2022 Voting
    • 2021 Winners
  • Design Guide Library
  • Resources
    • 3D Cad Models
      • PARTsolutions
      • TraceParts
    • Digital Issues
      • Design World
      • EE World
    • Women in Engineering
  • Supplier Listings

Microdrives help gear pumps deliver precise doses

By Editor | August 13, 2013

Share

Modern electronics and high-precision mechanics allow many everyday and industrial items to be miniaturized. The smaller a device can be built, the easier it is to transport, install or integrate into existing systems. One example is micro annular gear pumps for fluid delivery. Their simple, no-valve design allows them to come in a compact size with a virtually non-pulsating, easily adjustable flow.

Microdrives

Micro annular gear pumps with DC microdrives deliver precise volume dosing over long periods.

German manufacturer HNP Mikrosysteme GmbH makes compact, hermetically sealed micro annular gear pumps for continuous dosing. The pump is even able to handle corrosive media.

To achieve a drive compatible with the pump, with dimensions and output tailored to the pump delivery characteristics, HNP worked with Schönaich-based drive expert FAULHABER. The result was a compact pump/drive delivery unit suitable for a number of applications, including the more exotic.

Electronically commutated dc microdrives, which are particularly suitable for driving the micro annular gear pumps, are small in size, and offer high power density and a large speed range with excellent dynamics, enabling high-precision control of flow rates from the smallest volumes to a constant maximum throughput.

Pump operates virtually free of pulsations.

Pump operates virtually free of pulsations.

The hermetically sealed pump head is driven by means of a powerful rare earth magnetic coupling, which prevents leaks on the drive end. In combination with the materials available, such as nickel-based carbides, stainless steels, ceramics based on aluminum, zirconium oxide or silicon carbide, and plastics such as PTFE, PEEK and FKM, the pumps can be adapted to various media, including corrosive substances.

The pump, 22 mm in diameter and 69 mm long, and weighing around 100 g, is for 24 V operating voltage and can transfer 4.8 to 72 ml/min at up to 5 bar delivery pressure.

Thanks to the annular gear design, the pumpable viscosity range is between 0.3 and 100 mPas, with a pulsation of around 6% and a differential pressure range of 0 to 5 bar. The no-valve annular gear principle guarantees minimal shear forces during pumping.

A closer look at the structure and function of gearmotor pumps; no valves and only two movable parts.

A closer look at the structure and function of gearmotor pumps; no valves and only two movable parts.

The pump is driven by an electronically commutated dc motor with integrated speed controller. The brushless design enhances the service life and reliability of the drive. Motor-adapted variable-speed control is guaranteed by a controller that has the same diameter as the motor and is mounted on the rear of the motor. This means that the user can easily adjust the speed through an analog input with 0 – 10 V.

A digital input determines the direction of rotation. For additional monitoring functions, the digital frequency output provides a 15-mA output signal with six pulses per revolution.

The drive supply voltage is 12 or 24 Vdc, while the 22-mm motors achieve around 9 W and feature a torque of up to 59.9 Nm. Supply voltage to the speed controller is 5 to 28 Vdc through a separate flat ribbon cable. The motor efficiency of around 68%, as well as the more than 95% efficiency of the control electronics, allow for long operating times even in battery backed mobile devices.

The rugged stainless steel enclosure and wide temperature range of –40°C to +85°C enable the device to also be used outdoors. The short-term overload capability of the microdrives supports such applications, as this allows increased pump breakaway torques, for example, after overnight temperature drops, and the resulting higher fluid viscosity, to be mastered with ease.

Micromo
www.micromo.com


Filed Under: Design World articles, Gears • gearheads • speed reducers, Pumps
Tagged With: MICROMO
 

Tell Us What You Think!

Related Articles Read More >

Drone-mounted inspection breaks barriers for F-35
TriStar, a misunderstood failure of design
More on engineering and science
Dan Arvizu: Embracing the soft skills

DESIGN GUIDE LIBRARY

“motion

Enews Sign Up

Motion Control Classroom

Design World Digital Edition

cover

Browse the most current issue of Design World and back issues in an easy to use high quality format. Clip, share and download with the leading design engineering magazine today.

EDABoard the Forum for Electronics

Top global problem solving EE forum covering Microcontrollers, DSP, Networking, Analog and Digital Design, RF, Power Electronics, PCB Routing and much more

EDABoard: Forum for electronics

Sponsored Content

  • Global supply needs drive increased manufacturing footprint development
  • How to Increase Rotational Capacity for a Retaining Ring
  • Cordis high resolution electronic proportional pressure controls
  • WAGO’s custom designed interface wiring system making industrial applications easier
  • 10 Reasons to Specify Valve Manifolds
  • Case study: How a 3D-printed tool saved thousands of hours and dollars

Design World Podcasts

May 17, 2022
Another view on additive and the aerospace industry
See More >
Engineering Exchange

The Engineering Exchange is a global educational networking community for engineers.

Connect, share, and learn today »

Design World
  • Advertising
  • About us
  • Contact
  • Manage your Design World Subscription
  • Subscribe
  • Design World Digital Network
  • Engineering White Papers
  • LEAP AWARDS

Copyright © 2022 WTWH Media LLC. All Rights Reserved. The material on this site may not be reproduced, distributed, transmitted, cached or otherwise used, except with the prior written permission of WTWH Media
Privacy Policy | Advertising | About Us

Search Design World

  • Home
  • Technologies
    • 3D CAD
    • Electronics • electrical
    • Fastening & Joining
    • Factory automation
    • Linear Motion
    • Motion Control
    • Test & Measurement
    • Sensors
    • Fluid power
  • Learn
    • Ebooks / Tech Tips
    • Engineering Week
    • Future of Design Engineering
    • MC² Motion Control Classrooms
    • Podcasts
    • Videos
    • Webinars
  • LEAP AWARDS
  • Leadership
    • 2022 Voting
    • 2021 Winners
  • Design Guide Library
  • Resources
    • 3D Cad Models
      • PARTsolutions
      • TraceParts
    • Digital Issues
      • Design World
      • EE World
    • Women in Engineering
  • Supplier Listings