PROCESS EQUIPMENT UPDATE
chemicals, ensuring that repeated washdowns do not adversely affect the reliability or hygienic qualities of the geared motor. Further, when stainless steel is scratched, it does not compromise the corrosion or contamination resistance of the geared motor. Stainless steel geared motors – such as
the HiflexDrive from Bauer Gear Motor – are designed so that a fan and cooling ribs are not required, thereby allowing for a completely smooth outer casing with a non-drive end which is sealed. Tis allows the motor to be offered with up to IP69k rating – which protects against high-pressured washers and steam cleaning. Te elimination of venting elements creates a smooth outer surface, which provides a higher cleanability of the motor casing and prevents re-infection of the local environment caused by air movement from a cooling fan. Te product range is available in
Geared motors are ideal for driving stirrers and agitators
three sizes, ranging from 80 to 330Nm in standard, aseptic and stainless steel designs with power ratings up to 6.3kW, depending on the size selected. A two- stage gearbox design allows ratios of up to 109:1, depending on gear type, and allows a wide range of applications to be covered. Performance and efficiency gains
HACCP system in place, a further risk assessment may identify that the coatings on aseptic drives are prone to damage. Tis would expose the motor’s surface to corrosive chemicals and risk the food product being contaminated with paint fragments even when the coating is FDA approved. Terefore, many in the industry are now specifying stainless steel solutions. Stainless steel geared motors meet all
of the regulations set out by organisations such as the FDA and NSF without the need for specialist coatings. As a base material, stainless steel is inherently resistant to corrosion and
are also attained with the inclusion of IE4 (IE5 ready) permanent magnet synchronous motor (PMSM) technology. PMSMs offer considerably improved efficiency when compared to induction motors, with up to 30% energy saving. Te benefit is particularly apparent under partial load conditions, the technology having the added benefit of maintaining constant speed, independent of the load. Tis means that the motor speed does not vary – despite load variations or cases
of voltage drop – as long as the mains frequency is kept constant.
STAINLESS STEEL ADVANTAGE FOR RÜCKER For Rücker, one of Europe’s leading dairy producers, reducing HACCP risk factors is a key approach for all developments along its production lines. Using this system, it has progressed from standard geared motor technology, through aseptic solutions and now has the newest evolution stage of stainless steel. At each stage of development, the new solutions offered distinct benefits to the incumbent technology: improving efficiency, reducing maintenance and reducing risk. A 60m-long coagulator, used for cheese
curd processing, features several stirrers that keep the milk moving as the whey is removed from the curd. Each stirrer moves along a section of the lane; once it reaches the end of its section, the stirrer is lifted out of the curd and moves back to the starting position. Rücker first approached Bauer when its engineers identified that integrating the brakes into the housing of the geared motor would increase cleanability in the system and therefore reduce risk. Shortly after, Rücker began upgrading its geared motors to aseptic drives to take advantage of the improved hygiene ratings. Now the first of the aseptic drives have been replaced with stainless steel units from Bauer. Te stainless steel drives still offer the same integrated brake feature from the original unit, but now with the added hygiene performance and mechanical resilience of a stainless steel housing. Mr Krause, head of Maintenance at
Rücker, explains: “We follow a philosophy of continuous improvement for all of our production processes. Each update in geared motor technology has represented a real-world improvement, but we are always looking further ahead for what we can do next. “We already had very positive experiences with Bauer’s products and were aware of their quality. When it came to specifying a further upgrade to stainless steel, it was not surprising that the only supplier that offered a stainless option with built-in brakes was Bauer.”
Stainless steel motors don’t need fans or cooling ribs
Yasar Yüce is with Bauer Gear Motor.
www.bauergears.com
www.engineerlive.com 21
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68
