Mounts are small parts that have a big job. They isolate vibrations within equipment, extending the life of that equipment while improving safety and, when installed in human-operated machinery, enhancing operator comfort.
All machines with rotating parts will experience some vibration. Misalignment, imbalance or improper connections between parts—even to the extent allowed within manufacturing tolerances—all create vibration. Therefore, there are many types of vibration-isolation mounts on the market. Some mount technologies have been around a long time, while others are new innovations.
With the range of products available, which mount is right for your needs? You can begin to answer that question by understanding basic mount technologies.
Center-bonded mounts provide flexible suspension systems for mobile, transport-mounted or portable equipment. With rubber-to-metal construction, typical applications of center-bonded mounts include engines, cabs, fuel tanks, pumps, air conditioning units, compressors and industrial machinery. The mounts offer vibration isolation and shock protection in all directions; noise attenuation; easy, low-cost installation (because of their one-piece design); and a long service life. They are available in a full range of load capacities and able to withstand shock loads of 10 Gs. Their permanently bonded design offers consistent performance, extending the life of equipment and improving operator comfort.
Center-bonded mounts are often used to attach an engine to a frame. In addition to isolating vibration, engine mounts also support engine weight, counteract torque loads and accommodate engine motion during travel over rough terrain. Read our blog on the Six Degrees of Freedom.
Conical mounts, which are also rubber-to-metal construction, feature high load-bearing capabilities and a choice of radial stiffness characteristics. They are appropriate for both on- and off-road vehicles. Applications include cab mounts; engine and transmission mounts for trucks and buses; and construction and agricultural vehicles. Conical mounting systems are engineered to provide advanced control solutions for demanding noise and vibration conditions. The mounts are easily installed and have a long service life with consistent performance.
Because of their long and highly reliable service life, conical mounts are often used on agricultural equipment.
Fluidlastic cab mounts combine elastomeric and viscous fluid damping technology. The rubber mounts encapsulate the fluid, which flows through a variety of ports and orifices depending upon the dynamic characteristics needed. The mounts can be tuned to precisely match application requirements, resulting in lower noise, vibration and stresses in the cab. The technology performs as three mounts in one, depending upon the frequency and amplitude of the excitation. First, the mount is a spring providing basic load and motion capability to the system. Second, it’s a damper providing restricted motion at or near resonant conditions. And third, it’s a tuned absorber providing superior isolation at a specific frequency.
Measurably better than conventional mounts, Fluidlastic mounts reduce vibration and decrease noise levels 5 to 10 dB(A). They are effective in temperatures ranging from -40ºC to +80ºC (or -40ºF to 176ºF). They reduce reaction loads on the cab, lowering cab stress by as much as 50 percent. Furthermore, the mounts are cost-effective: they decrease costs associated with extra reinforcing materials and welding points on the cab while eliminating cabin breakage incidence caused by rough terrain.
Fluidlastic or viscous mounts can be used to dramatically increase operator comfort levels by reducing noise, vibration and other stresses in vehicle cabs. Read our blog on Today’s Industrial Equipment Offers More Comfort for Operators
Evaluate Your Wants Versus Needs
Since vibration isolation problems often require a system engineering analysis, Parker LORD can assist you with the mount selection process. Our engineers use specialized computer programs to analyze engine/transmission combinations along with cabs to provide an output that can be used to guide decisions.
Our internally developed software allows for analysis of multibody systems and their response at resonant frequencies. This shows the movement of a two-body system (e.g., an engine radiator combination).
So… Which Mount is Right for Your Application?
When considering mounting systems don’t forget that beyond up-front costs, the right mount can increase productivity by improving operator comfort, reducing operating costs and increasing uptime. Parker LORD mounts not only improve equipment across a variety of industries, but, when the right system is employed, can lower the total costs for OEMs over the life of a platform.
Our knowledge and experience in solving problems can help you select the right mount for your needs.