Heavy Duty Shock Absorbers

Applications: • Amusement ride emergency stops • Transportation safety stops • Ladle transfer cars • Coil upenders/downenders • Rolling mill chock separators • Furnace slab bumpers • Hot strip mill down-coiler • Re-heat furnace entry end shock absorber • Gantry

Table of Contents Product Selection HDN/HDA Series (Heavy Duty Shock Absorbers) Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-14 Adjustment Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13-14 HD Series (Heavy Duty Shock Absorbers) Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Company Overview ITT Enidine Incorporated Overview Company Overview ITT is a diversified leading manufacturer of highly engineered critical components and customized technology solutions for growing industrial end-markets in energy infrastructure, electronics, aerospace and transportation. Building on its heritage of innovation, ITT partners with its customers to deliver enduring solutions to the key industries that underpin our modern way of life. Founded in 1920, ITT is headquartered in White Plains, NY, with employees in more than fifteen countries and sales in more than 125 countries. The...

New Technologies and Enhancements Research and Development New Products and Services ITT Enidine Inc. engineers continue to monitor and influence trends in the motion control industry, allowing us to remain at the forefront of new energy absorption and vibration isolation product development. Our experienced engineering team has designed custom solutions for a wide variety of challenging applications, including automated warehousing systems and shock absorbers for hostile industrial environments such as glass manufacturing, among others. These custom application solutions have proven to be critical...

Theory of Energy Absorption ITT Enidine Incorporated Theory of Energy Absorption Overview As companies strive to increase productivity by operating machinery at higher speeds, often the results are increased noise, damage to machinery/products, and excessive vibration. At the same time, safety and machine reliability are decreased. A variety of products are commonly used to solve these problems. However, they vary greatly in effectiveness and operation. Typical products used include rubber bumpers, springs, cylinder cushions and shock absorbers. The following illustrations compare how the most...

Shock Absorber Sizing Examples Typical Shock Absorber and Stacker Crane Application Shock Absorber Sizing Examples Calculation Example Stacker Cranes Please note that this example shows how to calculate the maximum impact weight on the upper and lower shock absorbers for a stacker crane. Distance Between Buffers: Distance to C of G1 - Upper: Distance to C of G1 - Lower: Distance to C of G2 - Upper: Distance to C of G1 - Lower: Total Weight: Given Values Calculation for Lower Shock Absorbers Calculation for Upper Shock Absorbers Using the value for Wmax obtained above, the kinetic energy can be...

Shock Absorber Sizing Examples Typical Shock Absorber and Crane Applications Shock Absorber Sizing Examples Overview Calculations assume worst case scenario of 90% trolley weight over one rail. Front View Weight of Trolley Bridge Weight Plan Views Application 1_ Crane A against Solid Stop Velocity: V = V *r a Impact weight per buffer: Wd= Wa + (1.8) Wta Total Number of Shocks Please note: Unless instructed otherwise, ITT Enidine Inc. will always calculate with: • 100% velocity v, and • 100% propelling force FD Crane A against Crane B Velocity: Vr = Va + Vb Impact weight per buffer: W1 = Wa...

Overview Calculation Please note that this example is not based on any particular standard. The slung load Example for can swing freely, and is therefore not taken into account in the calculation. Harbor Cranes Bridge Weight: Weight of Trolley: Crane Velocity: Required Stroke: Trolley Velocity: Required Stroke: Given Values Shock Absorber Sizing Examples WWa + (1.8) Wta Total Number of Shocks W 837,750 + (1.8)(99,200) Determination of the Maximum Impact Weight Wd per Buffer 772 EK = 2,369,635 in-lbs. Selecting for required 24-inch stroke: HD 5.0 x 24, maximum shock force ca. 116,159 lbs...

Heavy Duty Shock Absorbers HDN, HDA Series Overview Heavy Duty Series ITT Enidine Inc. Heavy Duty Series large-bore hydraulic shock absorbers protect equipment from large impacts in applications such as automated storage and retrieval systems, as well as overhead bridge and trolley cranes. They are available in a wide variety of stroke lengths and damping characteristics to increase equipment life and meet stringent deceleration requirements. HDN Series Custom-orificed design accommodates specified damping requirements. Computer generated output performance simulation is used to optimize the...

Notes: 1. HDN shock absorbers will function satisfactorily at 5% of their maximum rated energy per cycle. If less than these values, a smaller model should be spea'fied. 2. It is recommended that the customer consult ITT Enidine Inc. for safety-related overhead crane applications. 3. The energy data listed is for ideal linear impacts only. If side load conditions exist in the application, contact ITT Enidine Inc. for sizing assistance. 4. Rear flange mounting of 12 inch (300 mm) strokes and longer not recommended. Front and rear flange or foot mount configurations are recommended. 5. Maximum...

Technical Data Heavy Duty Series Catalog No./ Model Notes: 1. HDN shock absorbers will function satisfactorily at 5% of their maximum rated energy per cycle. If less than these values, a smaller model should be specified. 2. It is recommended that the customer consult ITT Enidine Inc. for safety-related overhead crane applications. 3. The energy data listed is for ideal linear impacts only. If side load conditions exist in the application, contact ITT Enidine Inc. for sizing assistance. 4. Rear flange mounting of 12 inch (300 mm) strokes and longer not recommended. Front and rear flange or foot...