Application

• Marine Applications
  LO-REZ stands for low stiffness, low-resonance, low-transmissibility, low noise transmission. Lo-Rez curbs vibration, shock and noise by supplying a family of very high-quality integrated coupling and isolator products which are synergistically oriented to each other so as to enhance inherent performance significantly. Consider our range of vibration control systems for marine propulsion applications:
  
  
  
• Industrial Applications
  Controlling the transmission of linear vibration from a machine to its environs (isolation) can effectively be managed by the use of vibration isolators. A cardinal requirement in such isolation is the ratio of the disturbing frequency / natural frequency, which ratio should be at least 2/1 and preferably 4 or 5/1. The natural frequency of the machine on its isolators is directly tied to the isolator stiffness, which in turn is inversely proportional to the isolator static deflection; the larger this static deflection, the lower the stiffness and the lower the natural frequency.
  
  (Readers who are not familiar with isolation theory may wish to receive literature from Lo-Rez on this subject. Simply request it.)
  
  Since helical (coil) steel springs in compression are capable of much higher static deflection than rubber, and are still stable under high compressive loads, they are extremely useful in vibration isolators. Lo-Rez steel-spring housed foot-mounted isolators are available with up to 3" static deflection, for which the natural (vertical) frequency is 108 cycles per minute; for 2", it is 133 cpm; for 1", it is 188 cpm.
  
  The actual, real vertical natural frequency of a machine / housed-isolator assembly is somewhat higher (larger) than the theoretical frequency, due to the damping in the rubber stabilizing mouldings located in both ends of the isolators. For this reason, as well as the influence of the other five natural frequencies (see Fig. 3 and 4 of vibration isolator catalog), the effective isolation efficiency is never as high as simple theory indicates. (This effect is much more pronounced with rubber isolators). At Lo-Rez we use a 1.2 - 1.3 multiplier for the increase in natural frequency, for use in isolation efficiency calculations for most machines.