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Operating Group News - Industrial Group
Next-Generation Radial Piston Pumps: Quieter, More Durable
1 March 2006Moog has introduced a second-generation design for its Radial Piston Pump (RKP-II) that features significant improvements for the user. Available in sizes 63, 80 and 100 cc per revolution, the RKP-II is considerably quieter and has a longer lifetime due to a completely reengineered power train with an increased number of pistons and a sliding stroke ring. RKP-II models can also be equipped with a proportional valve with digital on-board control electronics for volume flow and pressure control.
“We were able to adapt the new RKP-II to meet market requirements more closely thanks to the experience gained with hundreds of thousands of Radial Piston Pumps in the field, combined with thorough evaluations during the development,“ says Dr. Sherif El-Henaoui, European Marketing Manager at Moog. “The RKP-II will be used in a wide range of machines such as injection molding and die casting machines and presses as well as in HPUs for general use that are often applied in the automobile industry.“
Significant Reduction in Noise Pressure Levels
Moog has implemented various design changes to greatly reduce the primary and secondary noise pressure levels produced by the RKP-II. Now the models of size 63 and 80 cc per revolution generally do not exceed the 70-decibel mark even in demanding operating conditions. Thus, the Moog RKP-II actively supports machine and equipment manufacturers in implementing the European Union’s noise emission guidelines (2003/10/EG).
The noise reduction improvement involved creating a new design that increased the number of pistons from 7 to 9. This enabled a reduction in the diameter of the working pistons, leading to a cutback in the dynamic transverse forces affecting the housing. The measure has simultaneously resulted in a noticeable reduction in volumetric flow and pressure pulsation on the high-pressure side.
Another improvement in the standard design of the RKP-II is an optimized large intake connection (SAE 2" standard series, 3000 psi) that reduces the cavitation inclination in the housing, control journal and drive. This results in a more robust suction behavior, optimum intake, and less pressure loss along the suction path.
Further improvements include the substitution of a rotating stroke ring by a flattened, sliding stroke ring with a square outer surface on which the ring sits inside the housing. This new design reduces the wear and tear on the entire actuator system and will increase machine stability and durability throughout the entire cycle.
About Moog Inc.
Moog’s Industrial Business Unit designs and manufacturers high performance motion control solutions combining electric, hydraulic, and hybrid technologies with expert consultative support in a range of applications including plastics, metal forming, textiles, power generation, and simulation. We help performance-driven companies design and develop their next-generation machines. Moog’s Industrial Business Unit, with 2005 sales of USD$315 million and 26 locations worldwide, is part of Moog Inc. (NYSE:MOG.A and MOG.B ). In 2005, Moog Inc.’s revenues exceeded 1 billion USD for the first time in its history.
