Ovoid spur-planetary gearbox for swimming pool filtration valves

When Van Erp International b.v. required a cost-effective and highly reliable motorised valve for its new water recycling treatment filtration system, they turned to Rotalink for an ovoid spur-planetary gearbox.

The manufacturer's Blue Lagoon and XClear brand of water treatment equipment sells into the consumer swimming pool, pond and spa markets where competitive pricing, dependability and operational simplicity are key selling factors. The new Tri-Matic water recycling system includes automatic backwash as well as exposing the rinse water to a powerful bacteria eradicating UV-C lamp. The innovative design has very low filtration resistance, allowing low-pressure and low-energy consumption pumps to be used.

Van Erp International had looked at various industrial valve and process control suppliers for the actuators but found that cost and complexity were barriers for the newly planned range. As a key supplier for other Blue Lagoon and XClear products including geared motors for peristaltic dosing pumps, Rotalink worked closely on the new valves with engineers at Van Erp International - closely following the pool equipment innovators philosophy of involving its suppliers in novel design and large scale production techniques.

The automatic backwash system comprises 2- and 3-way motorised automatic actuator valves arranged around the pool filter system that are controlled via a dedicated touchscreen computer. The user simply programs the backwash cycle frequency and the valves are sequenced - reversing the water direction as required for the filtration, backwash and rinse phases of the process. In operation, an open loop control using limit switches combines with the Rotalink reversible AC synchronous motor and high ratio ovoid gearbox, where the fixed speed at the output shaft is timed through the opening or closing phases of the valve. Should the valve be restricted by any sort of blockage, resulting in a timeout, an alarm and backup process is called into action and executed by the program.

The choice of the Rotalink Type 230 ovoid gearbox has special significance for the application: the 230 is a part of a wide range that combines both spur and planetary gear trains in a very compact pressed steel gearbox case with 4-point mounting. This technology facilitates a much higher torque-to-size factor than conventional ovoid gearboxes with spur gears and 2-point mounting, and also allows a significantly higher gear ratio to be used. The benefits of this elevated gearbox performance for the Blue Lagoon Tri-Matic backwash application include the advantage of a very compact PVC moulded valve housing that suits the restricted areas available in typical pool pump cabinets. In addition, the output torque available (up to 5Nm at low speeds) combined with the rigidity of the 4-point mounting increases the valves' ability to clear debris by pushing solid material through the valve more effectively. Also derived from the 230's torque output, the resulting torque reserve - being much higher than required for simply positioning the valve - provides the basis for high levels of reliability and long working life.

Concurrent product development process

As with past projects, Van Erp International and Rotalink worked closely as partners from the initial design brief through to volume production. Various motor-gearbox combinations were evaluated in a concurrent product development process that saw Rotalink test complete valves at its UK manufacturing plant. This process helped Van Erp International to reduce overall development timescales and achieve the fast time-to-market it requires to maintain a leading position in a very competitive business to consumer marketplace.

The Type 230 ovoid gearbox is part of a wide range of in-house designed and manufactured miniature gearboxes that include spur, combined spur-planetary and planetary gear systems in a choice of steel, polymer and ultra-polymer gear materials. Additional design options include nylon or ball-type bearings with standard and customised shafts, mechanical mountings and electrical connections. To learn more about motors and gearboxes from Rotalink, please visit www.rotalink.com.

Rotalink Ltd

Cropmead
Crewkerne
TA18 7HQ
UNITED KINGDOM

+44 (0)1460 72000

www.rotalink.com

More from Rotalink Ltd

Rare earth motors offer more power in a compact package

Posted 3 years ago

Innovative gear motors help to make fresh coffee less of a grind

Posted 4 years ago

High-speed polymer gearboxes deliver material gains

Posted 4 years ago

Absolute encoder offers new options for controlling DC motors

Posted 4 years ago

Incremental encoder suitable for low-speed applications

Posted 4 years ago

Miniature power transmission range has space-saving options

Posted 6 years ago

Rotalink motor gearboxes chosen for hairdressers' machine

Posted 7 years ago

New catalogue and site for miniature motors, power transmission

Posted 8 years ago

Three new high-performance models in spur ovoid gearbox range

Posted 8 years ago

AC synchronous geared motors supplied for peristaltic pumps

Posted 8 years ago

Customised gearboxes and actuators for OEMs

Posted 8 years ago

Low-cost speed-and-direction controller for DC motors

Posted 9 years ago

Heavy Case motors deliver smooth motion at a competitive cost

Posted 9 years ago

Miniature ovoid gearboxes in a choice of specifications

Posted 9 years ago

New catalogue: miniature power transmission systems and controls

Posted 10 years ago

Rare-earth brushed DC motors deliver twice as much power

Posted 10 years ago

New brushless Red Drive servo motor driver and controller

Posted 10 years ago

Ovoid style gearboxes now available with absolute encoder

Posted 10 years ago

Miniature brushless motors available with choice of options

Posted 10 years ago

Capabilities in miniature motors, transmission and control

Posted 11 years ago

3D CAD files for motors, gearboxes and transmissions

Posted 13 years ago

More applications
20 hours ago
High-quality UK made ABS power supply cases
13A Plug-in and In-line styles from BCL Enclosures includes flame-retardant ABS models
1 day ago
Variohm Group buys Phoenix America
Based in Fort Wayne, Indiana ,Phoenix offers a range of absolute and incremental encoders, together with speed and proximity sensors, custom moulded magnets and more
1 day ago
New chain configurator aids machine builders
Tsubaki's recently unveiled configurator can make specifying chain a whole lot quicker and easier
1 day ago
Counterfeit bearings – NSK continues the fight against the fakes
The scale of the fake bearings problem has been highlighted with the discovery of around 23,000 counterfeit NSK packages and labels at a plant in Hebei Province, China
1 day ago
Parker launches new hydraulic fluid particle contamination monitor
The company’s icount LaserCM30 Particle Contamination Monitor is now available and can provide test results in 90 seconds
2 days ago
Last few places on Machinery Safety Course
Just a handful of places remain available on the last Pilz City & Guilds accredited Machinery Safety Course in 2020. Diary date is December 14th to 17th
2 days ago
Camozzi Automation launches new quick exhaust safety valves
Designed to provide a plug and play solution for OEMs that need to be compliant with Machinery Directive 2006/42/EC, Camozzi Automation says that its new quick exhaust 2-way safety valve range also complies with ISO 13849-1 covering the safe design of control systems which perform safety functions
2 days ago
SICK’s Open Service for IO-Link function blocks
A new open software service for control systems has been introduced by SICK
5 days ago
Automatic bearing lubrication brings ore inspiring results in mining
By installing automatic lubricators for bearings on its conveyor drive motors and belt pulleys, an opencast mine in Hungary has seen a range of benefits, including the prevention of unplanned downtime, longer bearing life and reduced repair work
5 days ago
Kinoulton company conveys COVID-combating masks
Here's a great example of the germ of an idea resulting in the combating of COVID