{"id":1035,"date":"2024-06-23T15:14:39","date_gmt":"2024-06-23T11:44:39","guid":{"rendered":"https:\/\/www.skad-lift.com\/%d8%a2%d8%b3%d8%a7%d9%86%d8%b3%d9%88%d8%b1%d9%87%d8%a7%db%8c-%d9%87%db%8c%d8%af%d8%b1%d9%88%d9%84%db%8c%da%a9\/"},"modified":"2024-08-13T10:59:12","modified_gmt":"2024-08-13T07:29:12","slug":"hydraulic-elevators","status":"publish","type":"page","link":"https:\/\/www.skad-lift.com\/en\/hydraulic-elevators\/","title":{"rendered":"Hydraulic elevators"},"content":{"rendered":"\t\t
\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\tHydraulic elevators are one of the most common types of elevators around the world. To understand the popularity and widespread use of this type of elevator, it is enough to look at the available statistics. In Europe, nearly 70% of installed elevators are hydraulic. This type of elevator has a long history and many sources show that the first elevators invented by mankind used the hydraulic system. Today, with the advancement of technology, professionals have been able to use hydraulic systems in elevators instead of traction systems, which have higher security and are more economical. About 60 years ago, hydraulic lifts became popular in the elevator industry. With the arrival of motorless elevators (MRL) on the eve of the 21st century, these types of elevators faced new competition.<\/p> Since the 19th century, cable and water hydraulic elevators were used for vertical movement. In the 1950s, oil-hydraulic elevators were introduced to the elevator industry in Germany and the United States almost simultaneously and immediately became popular.<\/p> At first, hydraulic elevators were mostly used to carry cargo. But with the improvement of performance and for economic reasons, these elevators were also used to move people. The economic reasons included lower cost, the need for tools and less work for installation, which made these types of elevators find a better place in public use.<\/p> In the United States, companies made more hydraulic elevators than traction types in the 1970s, and in the 1980s they produced more than twice as many traction elevators. By 2000, about 70% of elevators built in the United States were hydraulic.<\/p> The hydraulic elevator was first invented in the 19th century by Elisha Otis. In 1852, he designed a landing system for tower elevators that used a drawbar and looping to ensure safety. The invention of the first elevator marked the beginning of a new era in the history of urban transportation. Easy access to the upper floors of buildings significantly contributed to future developments and the development of new technologies.<\/p> Since then, the hydraulic lift has been recognized as an essential tool for transporting people and materials in buildings. Compared to electric elevators, these types of elevators produce less noise and require simpler and less maintenance. The most important features of the hydraulic elevator include high speed, high efficiency, and the ability to accurately control the ascent and descent. In general, these elevators are reliable and efficient.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t Hydraulic elevator is usually used in buildings below 6 floors. When the elevator goes up, the motor in the power unit starts to rotate and pumps the oil from the tank to the cylinder. As the oil is pumped and the cylinder is filled, the jack piston is pressurized and connected to the cross-sling. In this way, the elevator car moves upwards. To stop the cab at any floor, the central system must send a message to the engine to stop pumping oil. because of their special features and advantages, especially in low and medium buildings. Some of the important features of hydraulic elevators are:<\/p> Hydraulic elevators are usually very suitable for carrying heavy loads and can withstand high load capacity.<\/p> Installing these types of elevators is easier and takes up less space due to the lack of a machine room on top of the building.<\/p> The installation and maintenance cost of hydraulic elevators is usually lower than traction elevators, because they do not require complex structures and heavy equipment.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t Due to the existence of hydraulic systems, these elevators are less prone to free fall. The emergency braking system and their smooth operation are more safe.<\/p> The movement of hydraulic elevators is generally smooth and silent because hydraulic systems are used to transmit power.<\/p> These elevators can be made in various designs and with customized cabins and adapt well to different architectural needs.<\/p> These elevators do not require a car room at the top of the building, which is a big advantage for buildings with height restrictions.<\/p> These elevators do not use energy when moving down, which can help reduce energy costs. Hydraulic elevators, despite many advantages, also have disadvantages, some of which are as follows. Of course, if the rules and standards are observed during the installation of hydraulic elevators and this work is done carefully and correctly, the advantages of hydraulic elevators will be much more than traction elevators. Hydraulic elevators are classified based on several factors. Among these criteria, we can mention the type of jack, the type of power unit, the structure of the jack (number of stages), the number of jacks, the type of control valve, the method of starting the engine, the type of use, etc. The most common classification in the industry is based on the type and installation method of the hydraulic jack. In the following, we will describe the differences between direct and indirect elevators and introduce common types of hydraulic elevators.<\/p> In this type, the elevator jack is directly connected to the cabin (yoke or carsling). In this case, the wire rope or chain and the pulley or chain wheel are removed.<\/p> In this type of elevator, the jack is connected to the cabin through a cable. In this model, a patch is installed on the jack and the wires are connected to the fixed support on one side and to the carsling on the other side.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t This is a type of direct jack lift where the jack is installed under the cabin. The installation of this system requires a jack hole under the elevator well, which must be well insulated against the penetration of water and corrosive substances.<\/p> If there is a limitation in the supply of the jack hole, telescopic jacks are used, which can be two-stage or three-stage and have a shorter cylinder length compared to the displacement length.<\/p> Hydraulic lift with indirect side jack This system is suitable for heavy lifts with long displacement height, such as car lift with 3 to 4 stops. This method is also used where it is not possible to dig a jack well.<\/p> Hydraulic lift with straight side jack This system is used for cases where the long length of the jack is problematic compared to the height of the elevator shaft. Two or three-stage telescopic jacks are placed next to the cabin.<\/p> This model is used for elevators with heavy load capacity and without the possibility of providing a jack hole. Some car, industrial and heavy elevators use this model. At high altitudes, there should be enough space at the top of the well to place the jack.<\/p> Telescopic jacks are used to solve the jack height problem in the double jack hydraulic elevator model. These jacks occupy less space in height and can be installed in two or three steps.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t Hydraulic elevators are suitable for different spaces and applications due to their special features and capabilities. In the following, I will explain in what spaces and for what applications hydraulic elevators are suitable:<\/p> \u00a0<\/p> Hydraulic elevators are especially suitable for buildings with low to medium height (usually up to 6 floors). The hydraulic system is not suitable for tall buildings due to the limitations of movement at high altitudes.<\/p> \u00a0<\/p> Hydraulic elevators are suitable for residential and small commercial buildings due to their lower installation and maintenance costs. These types of elevators can meet the needs of moving people in these buildings well.<\/p> Hydraulic car elevators are especially suitable for multi-storey parking lots. These elevators can move cars easily and safely between floors.<\/p>
In this article, we intend to comprehensively and accurately examine the various aspects of hydraulic elevators. In this regard, we will examine the types of hydraulic elevators, their advantages and disadvantages, construction and parts, and all the important things related to these popular types of elevators. Stay with Scud Lift.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/span>History of hydraulic lift<\/span><\/h2>
<\/span>How does a hydraulic lift work?<\/span><\/h2>
After stopping the pumping, the elevator stops at the desired floor. To move the cab down, a message must be sent to the control valves. This command causes the valve to open and oil to flow in the system. In this case, gravity and the weight of the cabin transfer the necessary force to the cylinder and the jack, which causes the cylinder to empty of oil.
To stop the elevator completely, the central control system must issue a command that closes the valve and stops the car.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/span>\u0645\u0632\u0627\u06cc\u0627\u06cc \u0622\u0633\u0627\u0646\u0633\u0648\u0631 \u0647\u06cc\u062f\u0631\u0648\u0644\u06cc\u06a9<\/span><\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
<\/span>Hydraulic elevators are used<\/span><\/h2>
<\/span>1. High power and efficiency:<\/span><\/h3>
<\/span>2. Easier installation:<\/span><\/h3>
<\/span>3. Lower cost:<\/span><\/h3>
\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/span>4. More security:<\/span><\/h3>
<\/span>5. Smooth and quiet operation:<\/span><\/h3>
<\/span>6. Flexibility in design:<\/span><\/h3>
<\/span>7. No need for upper space:<\/span><\/h3>
<\/span>8. Less energy consumption in some cases:<\/span><\/h3>
However, there are also some disadvantages, including lower speed compared to traction elevators and the need for constant maintenance of the hydraulic system.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/span>Disadvantages of hydraulic lift<\/span><\/h2>
\u2022 Lower speed than other elevators
Suitable for low-rise buildings (up to 5 floors)
\u2022 Increase in oil temperature during frequent use, especially when lowering
\u2022 Erosion of parts in contact with the soil
\u2022 Limitation in the number of starters compared to traction elevators
\u2022 Possibility of oil leakage in the elevator well<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/span>Types of hydraulic elevators<\/span><\/h2>
<\/span>Straight jack hydraulic lift<\/span><\/h2>
<\/span>Indirect jack hydraulic elevator<\/span><\/h2>
\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/span>Hydraulic jack lift from below<\/span><\/h2>
<\/span>Hydraulic jack lift from under telescopic<\/span><\/h2>
This type of elevator, which is also known as a side jack elevator, can be installed directly or indirectly. The most common type is the indirect side jack with a movement ratio of 1:2 and it is mostly used in passenger, household and small cargo elevators. This model uses a jack with a movement course of half the length of the track.<\/p><\/span>Hydraulic lift with two indirect side jacks<\/span><\/h2>
This system is suitable for installing low-rise elevators, for example, a hydraulic home elevator with two workstations.<\/p><\/span>Hydraulic jack lift on the side of the telescopic straight<\/span><\/h2>
<\/span>Hydraulic lift with two straight side jacks<\/span><\/h2>
<\/span>Hydraulic lift with two telescopic jacks<\/span><\/h2>
\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/span>What spaces are hydraulic elevators suitable for?<\/span><\/h2>
<\/span>1. Short and medium buildings:<\/span><\/h3>
<\/span>2. Small residential and commercial buildings:<\/span><\/h3>
<\/span>3. multi-story parking lots:<\/span><\/h3>
<\/span>4. Historical buildings:<\/span><\/h3>