Dec 6, 2018

POCLAIN HYDRAULICS & COMPACTION: two inseparable partners

When Poclain Hydraulics became independent in 1985, its global production stood at 16,000 motors per year. The future was still uncertain. High speed motors fitted with a gearbox dominated mobile applications. The compactor market was the first to be won over by the benefits of radial piston and cam lobe technology, which is extremely compact and in direct drive with the compactor drum. The founder of BOMAG KarlHeinz Schwamborn was behind the Poclain Hydraulics growth plan, and expressed his confidence in the new technology. Since then, production levels have risen fifteen-fold, and over two hundred applications have taken the technology on board. However, of all markets, compaction has recorded the largest increase with an average two-digit growth over the past ten years, thanks to win-win partnerships with major Western manufacturers including Bomag, Hamm, Dynapac, Ammann, Volvo, JCB and Caterpillar.

Over ten years ago, Poclain Hydraulics entered the Asian compaction market. Boosted by a 95% market share in Europe for small tandem drum compactors, it is no surprise that Poclain Hydraulics would choose this particular market segment for its Chinese and Japanese launch with its MK04 and MS02/MS05 product ranges. Now linked to all Japanese manufacturers and over twenty Chinese manufacturers including leading companies XCMG, Sany, Liugong Wuxi Powerment, Lonking and Shandong Roadway Construction Machinery, the Asian compaction market now holds increasing growth potential for direct drive solutions on 8 to 14 tonne (8.8 to 15 US ton) machines.

What are the specific functional needs of these machines?

The compactor drum operates through vibration, which can be controlled to achieve the best quality compaction. In certain environments, oscillating movements can be applied, which increases the versatility of the machines. In both cases, the drum must comply with certain design rules to ensure that the machine delivers its best performance, as well as being both cost-efficient and robust. Poclain Hydraulics uses radial piston technology in its motors to meet these requirements.

In addition, manufacturers now need more space inside the drum to incorporate increasingly complex vibration systems. The compactness of Poclain’s direct drive motors frees up considerable space inside the drum.

Moreover, given the increased stress caused by vibrations and working conditions, solutions must be robust and able to withstand high acceleration levels.

Performance is also an ongoing concern for our customers, in an increasingly stringent regulatory framework to address pollution. It is essential to reduce energy loss as much as possible while boosting performance.

Finally, the Asian markets require good logistic responsiveness at a very competitive market price.

Boosted by its 50% European market share in midsized single- and tandem-drum rollers, Poclain Hydraulics has developed a very attractive solution for Asian markets over the past two years.

The MS18/MSE18 version developed especially for compaction not only fulfils these requirements, but is gaining the trust and satisfaction of our Asian customers, particularly in China.

The compact and reinforced bearing support enables the machine to withstand an acceleration of twenty g-force, while the direct drive improves efficiency, prevents backlash and provides greater flexibility for use at low speed than machines using high-speed motors and gearbox assemblies. Poclain Hydraulics motors came out on top in terms of performance in a series of comparative laboratory tests, due to the use of radial pistons and direct drive, which restricts the number of moving parts and therefore friction. In fact, the MS18/MSE18 starting performance is 15% greater than a high-speed motor and gearbox combination and 12% higher overall.

With a displacement range of 1 to 2.8 liters and a parking brake of up to 19,000 Nm, a wide range of 8 to 14 tonne (8.8 to 15 US tons) compactors are covered to enable seamless machine integration. In terms of machine architecture, silentbloc shock absorbers can be placed either between the drum and the motor, or between the motor and the chassis. This provides greater flexibility for the manufacturer’s architecture than high-speed motors, which require complete isolation from the drum.compaction-motor-exploded-view

Mass production of the MS18/MSE18 compaction motors is now fully underway in our Indian plant, which is achieving the highest quality standards within the Group. This cost-efficient operation also provides an optimal logistics and distribution solution, given the short distance between the facilities and their customers.