Hydraulic pump suits noise-sensitive applications
A
Moog product story
Edited by the Engineeringtalk editorial team
Jan 9, 2007
Second-generation radial piston pump provides OEMs and end users with a number of important benefits.
Described as the ultimate in drive technology for stationary hydraulics applications, the new RKP-II second-generation radial piston pump from Moog provides OEMs and end users with a number of important benefits.
Of particular interest are those related to noise, durability, efficiency and service life.
An increased number of pistons, modified suction porting and redesigned stroke ring enhances fluid delivery, decreases flow pulsation, increases life and significantly lowers noise levels.
Initially available in 63, 80 and 100cm3 per revolution variants, its radial design offers many advantages compared with axial piston pumps such as low output pressure pulsation.
In most model sizes, an increase in the number of pistons from seven to nine reduces the piston diameter lowering the affect of dynamic transverse forces on the housing.
This means the RKP-II runs virtually stress free and is less subject to piston wear and detaching slipper pads.
Volume, flow and pressure pulsations on the high-pressure side are also noticeably lower.
The RKP-II with its completely re-engineered power train is ideally suited for integration into a wide variety of machines and installations.
According to Moog, these include those involved with tool production, plastic and metal forming, injection and pressure casting, rubber processing, test-bench construction and mining.
It is the pump's design that makes it the number one choice for these noise-sensitive stationary hydraulics applications the noise intensity for sizes 63 and 80 is less than 70dB at any working point allowing the RKP-II to support the implementation of the EU noise guideline 2003/10/EC.
It is designed to be highly resistant to wear and, as a result, is more tolerant of negative suction pressure.
This is due to all the parts associated with fluid flow dynamics being hardened eliminating pitting caused by cavitation.
Approved for a variety of operating fluids, the RKP-II has a number of control options to guarantee optimum flexibility no matter what the application.
It has significantly reduced maintenance requirements and its virtually unlimited storage life addresses many issues related to stocking spares especially important for manufacturing environments that are operating using modern lean principals.
The introduction of a larger suction port (SAE 2in - 207bar) together with an improved flow path in the housing and new porting in the journal means the RKP-II can offer extremely robust suction behaviour with optimum intake, less pressure loss along the suction path, lower flow noise and reduced risk of cavitation.
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