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BDC Focus on Industrial Damping Technology. BDC is a premier supplier of engineered Mechanical Shock Absorbers, Deceleration Devices and products for Hydraulic/Pneumatic Actuation and Motion Control applications......
BD Adjustable Hydraulic Shock Absorbers Series is the standard industrial Hydraulic Shock Absorbers. You only need rotate the adjustment knob changing the damping force to get the best energy absorption in different working conditions (weight, impact velocity, driving force etc.) and also provide best convenient model selection and application flexibility for customers because single model can meet wide ranges of operation conditions. End users also can adjust the knob to recover the best energy absorption if working condition changes. BC Hydraulic Shock Absorbers Self-Compensating Series The design of BC self-compensating Hydraulic Shock Absorbers is compact and with high performance, it can get higher energy absorption in same size comparing with adjustable series. It is mostly used in standard location with stable working condition (weight, impact velocity and driving force etc.). BHD Air-bag-like heay-duty Hydraulic Buffers, use the world advanced air bag restoration design. Enlarge the energy absorption performance and working stroke (energy absorption to 900KJ/C, stroke to 1500mm). Use new bladder design instead of traditional spring to restore, it shortened the total length of Hydraulic Buffers and the compression ratio when bladder completely pressed. It makes sure BHD products have lower peak damping force and lower restoration characteristic. BHD Shock Absorbers bladder designed heavy duty buffers is the global leading technology, provide the complete models and specifications. It is general used in all heavy industrial area, especially leading solutions for stacking machine in automatic warehousing industry BHDA Hydraulic Damper Shock Absorbers, Shock Absorber,Hydraulic Buffer the adjustable air-bag-like heavy-duty Hydraulic Damper with inside air bag design, it increased adjustable components on the basis of BHD Hydraulic Damper products stroke less than 300mm. To rotate the adjustment knob-changing the damping force to get the best energy absorption in different working conditions, provide best convenient model selection and application flexibility for customers since single model can meet kinds of different work stations, end users also can adjust the knob to recover the best energy absorption if some station changes. BHS Spring-type Heavy-Duty Hydraulic Buffer, the piston rod restored by outside spring, the specialty of this Hydraulic Buffer is the stroke length is shorten than cylinder diameter, application in low acceleration requirements devices when in deceleration and in braking devices.Shock Absorbers, Shock Absorber,Hydraulic Buffer. BHI Hydraulic-Pneumatic Heavy-Duty Hydraulic Shock Absorbers, this global advanced damping technology initially used in undercarriage of plane in aerospace, hydraulic oil and nitrogen gas work together to absorb the impact energy. With small volume and high energy’s specialty, wide range used in emergency case of heavy duty safety protection device, especially leading solutions for harbor machinery, hydraulic stop buffers of railway industry. BDC is the world Sales and Support Distributor of the BDC range of industrial shock absorber deceleration & damping components for industrial and heavy duty engineering applications. The company provides high quality adjustable, self compensating linear and progressive industrial shock absorber buffers that are precision engineered at its modern factory site in Germany offering increased efficiency and cost savings. BDC can supply bespoke customer specified heavy duty hydraulic industrial shock absorbers in a quick delivery time for use in applications such as overhead crane shock absorbers, automated stacker warehouse industrial shock absorbers for high-rack facilities, port harbour cranes shock absorbers, industrial shock absorbers for military use, test rigs shock absorbers, as well as elasto fluid buffer stops for railway trains, shock absorbers for cable cars, swing bridges or emergency use industrial shock absorbers throughout heavy engineering steelworks and mining industries. The range of heavy duty industrial shock absorbers are used in many different industrial, marine and military areas to protect machines, equipment and goods from heavy impacts. Supported by BDC the product range covers the acclaimed BDC Mega-Line? range of industrial shock absorbers as well as heavy-duty shock absorber buffers. Deceleration speed damping cylinders, door dampers, rotary dampers, speed rate controls and gas spring struts both standard and lockable as well as a wide range of air springs, rolling lobes, metal cushions, steel spring isolators and elastomer springs for vibration control isolation. Feed escapements and grippers for parts handling, pallet stoppers and positioning stopper cylinders for conveyor transfer systems complete the product portfolio. With over 10 years experience in the development and manufacture of industrial shock absorber deceleration components and having established an excellent reputation for offering a quick delivery time to providing both standard and special versions of industrial shock absorbers BDC can offer you the right deceleration control buffer solution. The high quality specification of the industrial shock absorber product range is confirmed by the award of DIN ISO9001:2008. With the help of a calculation software sizing tool for industrial shock absorbers, heavy duty shock absorber buffers, rotary dampers, metal cushions, crane bumpers, elastomer springs, air springs and gas springs the best deceleration solution can easily be found. CAD drawing packages are available to download in 2D & 3D formats. BDC is the world Sales and Support Distributor of the BDC range of industrial shock absorber deceleration & damping components for industrial and heavy duty engineering applications. The company provides high quality adjustable, self compensating linear and progressive industrial shock absorber buffers that are precision engineered at its modern factory site in Germany offering increased efficiency and cost savings. BDC can supply bespoke customer specified heavy duty hydraulic industrial shock absorbers in a quick delivery time for use in applications such as overhead crane shock absorbers, automated stacker warehouse industrial shock absorbers for high-rack facilities, port harbour cranes shock absorbers, industrial shock absorbers for military use, test rigs shock absorbers, as well as elasto fluid buffer stops for railway trains, shock absorbers for cable cars, swing bridges or emergency use industrial shock absorbers throughout heavy engineering steelworks and mining industries. The range of heavy duty industrial shock absorbers are used in many different industrial, marine and military areas to protect machines, equipment and goods from heavy impacts. Supported by BDC the product range covers the acclaimed BDC Mega-Line? range of industrial shock absorbers as well as heavy-duty shock absorber buffers. Deceleration speed damping cylinders, door dampers, rotary dampers, speed rate controls and gas spring struts both standard and lockable as well as a wide range of air springs, rolling lobes, metal cushions, steel spring isolators and elastomer springs for vibration control isolation. Feed escapements and grippers for parts handling, pallet stoppers and positioning stopper cylinders for conveyor transfer systems complete the product portfolio. With over 10 years experience in the development and manufacture of industrial shock absorber deceleration components and having established an excellent reputation for offering a quick delivery time to providing both standard and special versions of industrial shock absorbers BDC can offer you the right deceleration control buffer solution. The high quality specification of the industrial shock absorber product range is confirmed by the award of DIN ISO9001:2008. With the help of a calculation software sizing tool for industrial shock absorbers, heavy duty shock absorber buffers, rotary dampers, metal cushions, crane bumpers, elastomer springs, air springs and gas springs the best deceleration solution can easily be found. CAD drawing packages are available to download in 2D & 3D formats. BDC Co., Ltd. has released a comprehensive range of industrial shock absorbers, designed to help improve product handling in manufacturing applications and in automated package handling. The shock absorbers are designed to smoothly and gradually stop their movement without causing bounce-back or other unwanted effects, self-compensating for varying loads. In principle an industrial shock absorber is a small, spring loaded hydraulic cylinder that absorbs the kinetic energy of moving objects, bringing them smoothly to a standstill. By pumping oil from one chamber to another at a flow rate that varies according to the load applied, the action absorbs smoothly. In contrast, a simple buffer or spring stop tends to cause the moving part to bounce back and forth before stopping which could cause damage in the process. Because industrial shock absorbers keep moving objects under full control, the operational speed of machines and plant can be increased; while also providing smoother operation and less operator fatigue. Their smooth deceleration of moving parts leading to reduced wear, lower noise and extended equipment life, which reduces vibration, noise and shock loads, leading to reduced maintenance needs and a better working environment. BDC industrial shock absorbers are maintenance free and sealed for life, so are fit- and-forget items that can make a significant difference to overall productivity. They are available in two variations, adjustable and self-compensating and come in a range of sizes and capacities. Adjustable shock absorbers have a single variable orifice connected to an adjusting wheel with a graduated scale. A few strokes after initial installation the unit can be tuned to match the needs of the application. Once the absorber is set, the adjusting wheel can be locked using a removable key, while the scale allows simple, fine adjustment. BDC’s adjustable shock absorbers are made to a robust steel design with rubber end caps and can working in a temperature range from -10°C to 80°C. BDC’s self compensating shock absorbers are of a slightly more complex design, using a double tube configuration to create the oil chamber. In use, hydraulic oil is forced though an array of small orifices in one tube as the piston retracts. The spacing and design of the orifices maintains a constant pressure on the piston throughout the full stroke so that deceleration is linear. Again of a robust design, and with a good tolerance to variations in operating temperature, the self-compensating units have either a rubber or nylon end cap. BDC is a leading chinese manufacturer of standard parts, machine accessories and workholding components and supplies these to users around the world. Its goal is to provide high quality, superior performance components, unrivalled choice and excellent value for money. Its 24 hour on-line ordering is complimented with free 2D and 3D CAD model downloads. ACE Magnum Group shock absorbers, which include adjustable and selfcompensating models, offer up to 3.9 times the effective weight capacity of standard models without increasing size or cost. Adjustable shock absorbers are widely used because they provide an economical way to decelerate loads, prevent impact damage, dampen noise, and increase equipment speeds. They're also simple to apply. One need only approximate the correct size shock from a few different models and then tune it on the machine for best performance. But ever since William J. Chorkey patented the first adjustable industrial shock absorber in 1963, there have been relatively few major innovations. One was the introduction of self-compensating shock absorbers in the 1970s. These devices operate across a relatively wide range of input conditions without the need for adjustment. Compared with adjustable shocks, however, self-compensating units have slightly lower energy ratings and require more models to cover a given range. Other styles were introduced over the years to accommodate specific markets, including crane bumpers, stacker-crane shocks, and soft-contact and heavy-duty units. Nonetheless, adjustable versions remain the "bread-and-butter" shocks of industrial automation. This increasingly presents a problem for today's users. Competitive pressures demand machines that run faster and maximize throughput which, in turn, requires shocks with higher cycle rates and wider operating ranges. At the same time, there is a trend toward smaller, lighter equipment and lower costs. So simply specifying a larger shock is often not an option. Despite the fact that shock-absorber manufacturers have continuously refined their products, the nearly 40-yr-old design has nonetheless been pushed to its practical limits. Ace Controls Inc., Farmington Hills, Mich., addressed this problem by fundamentally redesigning the basic industrial shock absorber. The resulting range of products, called the Magnum Group, features 50% more energy capacity without increasing size or cost. At the same time, Ace managed to maintain interchangeability with existing models and build in user-friendly features such as a fully threaded body, an integral stop pad, and adjustability from either end. Designing a shock with higher energy ratings is straightforward, but it also presents sizable challenges because of a limited number of options available to increase energy-absorption capacity. In a shock, energy capacity, E, is determined by E = FS, where F = force and S = stroke. To ensure interchangeability, the stroke of each shock had to match an existing model, so designers could only manipulate force. In the case of a shock absorber, F = PA, where P = pressure and A = area. Because existing shocks already operate at 8,000 to 12,000 psi, the best approach was to increase the piston diameter and area, rather than pushing operating pressures beyond recommended limits. Not surprisingly, a larger piston, inner tube, and metering tube consumed valuable space inside the shock absorber. Additional volume was lost as a direct result of the goal to create a fully threaded body, which eliminated an oversized midsection that housed the closed-cell foam accumulator. Accumulators are a key element in shockabsorber performance. When the piston strokes, the foam accumulator collapses to accommodate the displaced oil. Typically, foam compression should be on the order of 20 to 25%. The most expedient method to recover the lost volume was to hollow out other internal parts of the system and fill them with foam. Unfortunately, the best results with this method compressed the foam from 40 to 45%. These prototypes failed under test due to deterioration of the closed-cell foam. Another option was to use a less-dense foam, but past experience had shown that thinner cell walls combined with high compression caused premature failures. Changing from foam to a small bladder accumulator solved the problem. While foam averages 46% solid material by volume, the bladder design, in comparison, averages only 13%. The bladder accumulator made better use of the available volume, solving the dilemma of fitting a larger piston in the same-size housing. Energy ratings for Magnum Group shock absorbers range from 1,350 to 54,000 lb-in./cycle. This extensive range lets design engineers specify shock absorbers with higher safety factors within the same package. In some cases designers can specify smaller sizes at a lower cost. Applications include packaging machinery, conveyors, robots, and bottling equipment, or anywhere motion control is necessary.