hydraulic cylinders play a central role in many technical systems. In this comprehensive overview, we not only offer the latest innovations in the industry but also basic knowledge. You will also receive practical tips Troubleshooting with defective hydraulic cylinders and exciting insights into them Applications of linear actuatore. Trust in the manufacturers’ in-depth expert knowledge and stay up to date.
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16.08.2024 | The synchronous movement of all lifting cylinders is crucial for the precise lifting and lowering of pallet changers in laser cutting systems. Hawe Hydraulics With the decentralized Liftax solution, we offer a highly precise and compact plug-and-play unit that is mounted at each lifting point of the pallet changer.
Thanks to the compact design of 415 x 338,5 mm, there is no need for complex piping between the units, which makes installation and commissioning much easier. Service case A unit can be replaced or repaired separately without having to dismantle the entire lifting table.
The low oil volume of only 0,7 l per unit reduces maintenance effort. When using 4 Liftax modules in a pallet changer, only a total volume of approx. 3 l of oil would be required. The classic solution with a standard hydraulic unit and central synchronous control block, on the other hand, would generally require between 20 and 50 l of oil, depending on the cylinder size.
Each unit consists of a tank with 1,75 kW Motor and externalgear pump. The required system pressure is measured at a pressure relief valve In addition, the integrated flow control valve ensures exact synchronization of the cylinder movements with a tolerance of less than ±5 percent. This ensures maximum precision and reliability in operation.
Sep 06.09.2023, XNUMX | The physical ones Advantages of hydraulics are compact design, high force density and wear resistance. When it comes to electro-hydraulic axles, they are easy to install, energy efficient and steering supplemented by software.
Electro-hydraulic Linear axes have been established by various manufacturers in recent years. However, due to their rated power, the electro-hydraulic compact axes on the market are mainly suitable for automation tasks or use in machine tools.
Hunger hydraulics is now expanding the range of applications with the Hunger Drive. This offers a nominal force of 2500 kN. True to the motto: #howbigdoyouwantit, significantly higher nominal loads can also be taken into account.
November 17.11.2022, XNUMX | Hydraulic cylinders are used to transmit power from one Motor or a hydraulic pump on other parts. These are from Construction to presses can be found in all areas. There are many reasons for hydraulic cylinder failure. Cycon tells you about the most common ones Damage and causes.
Since then 1970s Cycon repairs defective hydraulic cylinders. The company has decades of experience repairing hydraulic cylinders from numerous manufacturers and brands. All work from eliminating leaks to repairing massive damage is carried out in our own production facility.
July 16.07.2021, XNUMX | A huge hydraulic cylinder leaves the Hunger Factory halls in Lohr am Main and is transported to the end customer in Shanghai. Engineering, material procurement and manufacturing of this 200 t hydraulic cylinder presented a particular challenge. The hydraulic cylinder is used on an offshore platform, where it moves an approximately 140 m long, crane-like boom.
All materials were specially manufactured. The largest components such as the cylinder tube and piston rod had to be from several parts be welded together. The travel-sized hydraulic cylinder corresponds to the most modern standard in cylinder construction. The piston rod is equipped with a combined laserCeramicsCoating protects against corrosion and wear, low-friction seals ensure smooth running and the spherical bearings for attaching the cylinder are maintenance-free.
Thanks to hydraulic Security block The hydraulic cylinder can safely support the load under all circumstances, even if a hose line bursts or other malfunctions occur in the system. The hydraulic cylinder is one of the largest in the world with a 1400 mm piston diameter, 15.800 mm stroke, a total length of 23,5 m and a maximum pressure force of 3000 t.
Initially the 200 t cylinder was equipped with a Heavy-duty transporter transported from the Hunger factory premises to the inland waterway ship pier in Lohr am Main, 2 km away. The enormous weight of the cylinder was distributed over 22 individually controllable and height-adjustable axes. Two 500 t mobile cranes were available for loading onto an inland waterway vessel. It seemed to float effortlessly between the cranes and was finally lowered into the hull. When the hydraulic cylinder was lowered, the 750 t inland waterway vessel immediately increased its draft by 40 cm.
29.06.2021 | Bosch Rexroth is expanding its offering in the area of electrically controlled, servo-hydraulic systems by adopting an extensive technology package compact axes. The technology now adopted from EH-D and Onovum expands the portfolio into the range below 10 kW.
05.10.2017 | AHP Merkle presents its newly developed linear damping for hydraulic cylinders such as tie rod cylinders or block cylinders. The damping process is significantly faster and yet gentler to use. The designer can also easily calculate them and therefore design them better than is the case with solutions currently on the market.
In the new Tie rod cylinder ZHZ 160, the linear cushioning is already available as standard. As with all products from AHP Merkle, this hydraulic cylinder is also equipped with hardened and hard-chrome-plated piston rods as standard. The tie rod cylinder is designed according to DIN / ISO 6020/2.
Hawe Hydraulik merges production plants in China
The new Block cylinder with inductive Switches BZP 501 is more compact and cheaper than previous hydraulic cylinders with inductive switches. The block cylinder has a switching point that can be adjusted in the end position by at least 8 mm. In addition, this hydraulic cylinder including switches will also be available as a high-temperature version with up to 140 °C.
Last but not least, the hydraulics specialist is also providing a first catalog Locking cylinder in front. Two dimensions are already available as catalog items, and larger locking cylinders will also be available from October.
12.08.2010/XNUMX/XNUMX | That Unterereichen hydroelectric power station is currently being modernized. Six new machines, each consisting of a generator and a Francis single-chamber two-wheel turbine, will be put into operation over the course of two years. During the renovation, two of the three machines are running and one is shut down. The machines are delivered and installed by Andritz Hydro, which in turn are equipped with hydraulic cylinders from Hydropneu equipped.
While this water turbine was originally designed for relatively low head heights, very different head heights can now be used with this type of turbine. The Impeller surrounds a guide device that regulates the water flow by adjusting the rotating blades of the guide device. This guide is controlled by two double-acting hydraulic cylinders. These cylinders with mechanical locking of the piston rod are custom-made by Hydropneu.
In addition to a very high Locking force The working cylinders have various other important functions that are required for this application. The mechanical locking of this cylinder positively blocks the piston rod. With the new development, the locking segments still move into the locking position even if the hydraulic supply fails.
Servohydraulics | Calculator and new developments
The position of the Piston rod is continuously integrated via an transducer recorded. Together with a corresponding proportional valve control, it can be used to display a complete position and speed control. The locking itself is also monitored by a pressure-proof proximity switch. The hydraulic damping in the cylinder enables a soft, low-vibration approach to the end position.
Untere Iller Aktiengesellschaft (UIAG) operates and generates three power plants since 1932 Electricity from hydropower on the Iller Canal between Altenstadt and Illertissen. The UIAG hydroelectric power plants in Altenstadt, Untereichen and Au supply 100 million kWh of electrical energy from renewable sources every year. This means that around 30.000 households can be supplied with environmentally friendly electricity all year round.
Small hydropower is not only an economical and environmentally friendly source of energy, but also has positive effects on the habitat of people and animals. The turbines of the small hydroelectric power plants whirl oxygen into the water. This favors the Preservation of fish stocks. In addition, power plants and power plant rooms can contribute to flood protection.
The structure of a hydraulic cylinder essentially consists of five main components: The cylinder tube serves as a housing in which the piston moves up and down, thereby transmitting the hydraulic force generated. The piston rod transmits the movement and force of the piston to the outside. Piston seal, rod seal and housing seal ensure that the hydraulic oil stays in the system and no foreign objects enter. End caps close the cylinder at both ends and are usually provided with the connections for the hydraulic fluid. How a hydraulic cylinder works: When hydraulic oil is fed into the cylinder under pressure, it moves the piston, which in turn moves the piston rod and thus performs mechanical work.
The most common designs of hydraulic cylinders are:
Hydraulic cylinders are in demand in many industries and applications due to their ability to convert high forces into linear movement. The versatility of hydraulic cylinders enables their use in almost every area, where precise and powerful linear movements are required. The most common areas of application include:
Source: This article is based on information from the following companies: AHP Merkle, Bosch Rexroth, Cycon, Hawe, Hunger Hydraulik, Hydropneu.
Angela Struck is editor-in-chief of the development scout and freelance journalist as well as managing director of Presse Service Büro GbR in Ried.