{"id":962,"date":"2024-06-30T16:34:23","date_gmt":"2024-06-30T13:04:23","guid":{"rendered":"https:\/\/www.skad-lift.com\/%d8%a2%d8%b3%d8%a7%d9%86%d8%b3%d9%88%d8%b1-%d9%87%db%8c%d8%af%d8%b1%d9%88%d9%84%db%8c%da%a9%db%8c\/"},"modified":"2024-08-13T10:54:40","modified_gmt":"2024-08-13T07:24:40","slug":"hydraulic-elevator","status":"publish","type":"page","link":"http:\/\/www.skad-lift.com\/en\/hydraulic-elevator\/","title":{"rendered":"Hydraulic Elevator"},"content":{"rendered":"

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Hydraulic elevators are among the most common types of elevators worldwide. To understand the popularity and widespread use of this type of elevator, one only needs 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 indicate that the first elevators invented by humans utilized hydraulic systems.<\/p>\n

In this article, we aim to thoroughly and precisely examine various aspects of hydraulic elevators. We will explore the different types of hydraulic elevators, their advantages and disadvantages, structure and components, and all important factors related to these popular elevators. Stay with Skad Lift.<\/p>\n

<\/span>History of Hydraulic Elevators<\/strong><\/span><\/h2>\n

Today, with advancements in technology, experts have been able to use hydraulic systems in elevators instead of traction systems, which offer higher safety and are more cost-effective.<\/p>\n

About 60 years ago, hydraulic elevators gained popularity in the elevator industry. With the advent of machine-room-less (MRL) elevators at the dawn of the 21st century, this type of elevator faced new competition.<\/p>\n

Since the 19th century, cable and hydraulic elevators have been used for vertical transportation. In the 1950s, oil hydraulic elevators were introduced to the elevator industry almost simultaneously in Germany and the United States and quickly gained popularity.<\/p>\n

Initially, hydraulic elevators were primarily used for freight transport. However, with improved performance and for economic reasons, these elevators began to be used for passenger transport as well. Economic reasons include lower costs, reduced need for tools and labor for installation, which led to a better position for these elevators in public use. In the United States, companies built more hydraulic elevators than traction elevators in the 1970s, and by the 1980s, their production was more than twice that of traction elevators. By the year 2000, about 70% of elevators manufactured in the United States were hydraulic.<\/p>\n

The hydraulic elevator was first invented in the 19th century by Elisha Otis. In 1852, he designed a safety system for elevator shafts that used a safety mechanism and ring system to ensure safety. The invention of the first elevator marked the beginning of a new era in urban transportation. Easy access to higher floors in buildings significantly contributed to future advancements and the development of modern technologies<\/p>\n

<\/span>Go to the desired section<\/span><\/h4>\n

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Since then, hydraulic elevators have become essential tools for transporting people and materials within buildings. Compared to electric elevators, these elevators produce less noise and require simpler and less maintenance. The most important features of hydraulic elevators include high speed, high efficiency, and precise control in ascent and descent. Overall, these elevators are reliable and efficient.<\/p>\n

<\/span>How Does a Hydraulic Elevator Work?<\/strong><\/span><\/h2>\n

Hydraulic elevators are typically used in buildings with fewer than six floors. When the elevator rises, the motor in the power unit starts rotating and pumps oil from the reservoir into the cylinder. As the oil is pumped and the cylinder fills up, the pressure on the piston jack causes it to move, which is connected to the car sling. This makes the elevator cabin move upwards. To stop the cabin at each floor, the central system must send a signal to the motor to stop pumping the oil.<\/p>\n

After stopping the pumping, the elevator halts at the desired floor. To move the cabin downward, a signal must be sent to the control valves. This command opens the valve, allowing the oil to flow within the system. At this point, gravity and the weight of the cabin transfer the necessary force to the cylinder and jack, causing the cylinder to empty of oil.<\/p>\n

To bring the elevator to a complete stop, the central control system must issue a command to close the valve and stop the cabin.<\/p>\n

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<\/span>Advantages of Hydraulic Elevators<\/strong><\/span><\/h2>\n

Hydraulic elevators are used, particularly in low to medium-rise buildings, due to their unique features and advantages. Some key features of hydraulic elevators include:<\/p>\n

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<\/span>High Power and Efficiency:<\/strong><\/span><\/h3>\n

Hydraulic elevators are generally well-suited for carrying heavy loads and can support high load capacities.<\/p>\n

<\/span>Easier Installation:<\/strong><\/span><\/h3>\n

These elevators are simpler to install because they do not require a machine room at the top of the building, thus occupying less space.<\/p>\n

<\/span>Lower Cost:<\/strong><\/span><\/h3>\n

The installation and maintenance costs of hydraulic elevators are usually lower compared to traction elevators, as they do not require complex structures or heavy equipment.<\/p>\n

<\/span>Increased Safety:<\/strong><\/span><\/h3>\n

Due to the hydraulic systems, these elevators are less likely to experience free fall. Their emergency braking system and smooth operation contribute to greater safety.<\/p>\n

<\/span>Smooth and Quiet Operation:<\/strong><\/span><\/h3>\n

The movement of hydraulic elevators is generally smooth and quiet, as they use hydraulic systems for power transmission.<\/p>\n

<\/span>Design Flexibility:<\/strong><\/span><\/h3>\n

These elevators can be designed in various styles and with custom cabins, making them well-suited to different architectural needs.<\/p>\n

<\/span>No Need for Top Space:<\/strong><\/span><\/h3>\n

Hydraulic elevators do not require a machine room at the top of the building, which is a significant advantage for buildings with height restrictions.<\/p>\n

<\/span>Lower Energy Consumption in Some Cases:<\/strong><\/span><\/h3>\n

These elevators do not consume energy when moving downward, which can help reduce energy costs.<\/p>\n

However, there are some drawbacks, including slower speeds compared to traction elevators and the need for ongoing maintenance of the hydraulic system.<\/p>\n

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<\/span>Types of Hydraulic Elevators<\/strong><\/span><\/h2>\n

Hydraulic elevators are categorized based on several factors. These criteria include the type of jack, type of power unit, jack structure (number of stages), number of jacks, type of control valve, motor startup method, and usage type, among others. The most common classification in the industry is based on the type and method of hydraulic jack installation. Below, we will describe the differences between direct and indirect hydraulic elevators and introduce the common types of hydraulic elevators.<\/p>\n

<\/span>Direct Hydraulic Jack Elevator<\/strong><\/span><\/h3>\n

In this type, the elevator jack is directly connected to the cabin (yoke or car sling). In this setup, the wire rope or chain and pulley or chain wheel are eliminated.<\/p>\n

<\/span>Indirect Hydraulic Jack Elevator<\/strong><\/span><\/h3>\n

In this type of elevator, the jack is connected to the cabin via a wire rope. In this model, a pulley is installed on the jack, and the wire ropes are connected from one side to a fixed support and from the other side to the car sling.<\/p>\n

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<\/span>Underground Hydraulic Jack Elevator<\/strong><\/span><\/h3>\n

This type is a direct jack elevator where the jack is installed beneath the cabin. Installing this system requires a pit for the jack beneath the elevator shaft, which must be well-insulated against water ingress and corrosive materials.<\/p>\n

<\/span>Side Hydraulic Jack Elevator (Indirect)<\/strong><\/span><\/h3>\n

This type of elevator, also known as a side jack elevator, can be installed either directly or indirectly. The most common type is the indirect side jack with a 1:2 movement ratio, and it is frequently used in passenger, home, and small freight elevators. This model uses a jack with a stroke length that is half the length of the travel path.<\/p>\n

<\/span>Telescopic Hydraulic Jack Elevator<\/strong><\/span><\/h3>\n

When there is a limitation in providing a pit for the jack, telescopic jacks are used. These can be either two-stage or three-stage and have a shorter cylinder length relative to the travel length.<\/p>\n

<\/span>Side Hydraulic Jack Elevator (Indirect)<\/strong><\/span><\/h3>\n

This type of elevator, also known as a side jack elevator, can be installed either directly or indirectly. The most common type is the indirect side jack with a 1:2 movement ratio and is primarily used in passenger, home, and small freight elevators. This model uses a jack with a stroke length that is half the length of the travel path.<\/p>\n

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<\/span>Indirect Side Hydraulic Jack Elevator with Two Jacks<\/strong><\/span><\/h3>\n

This system is suitable for heavy-duty elevators with a long travel height, such as car elevators with 3 to 4 stops. It is also used where drilling a pit for the jack is not feasible.<\/p>\n

<\/span>Direct Side Hydraulic Jack Elevator<\/strong><\/span><\/h3>\n

This system is suitable for installing low-rise elevators, such as a hydraulic home elevator with two working stations.<\/p>\n

<\/span>Direct Telescopic Side Hydraulic Jack Elevator<\/strong><\/span><\/h3>\n

This system is used when a long jack length relative to the height of the elevator shaft is problematic. Telescopic jacks, either two or three-stage, are positioned beside the cabin.<\/p>\n

<\/span>Direct Side Hydraulic Elevator with Two Jacks<\/strong><\/span><\/h3>\n

This model is used for elevators with heavy load capacities and where drilling a jack pit is not possible. Some car elevators, industrial elevators, and heavy-duty models use this configuration. For high elevations, sufficient space must be available above the shaft for the jacks.<\/p>\n

<\/span>Telescopic Double Hydraulic Jack Elevator<\/strong><\/span><\/h3>\n

To address the height issue of jacks in double jack hydraulic elevator models, telescopic jacks are used. These jacks occupy less vertical space and can be installed as two or three-stage systems.<\/p>\n

<\/span>Suitable Spaces for Hydraulic Elevators<\/strong><\/span><\/h2>\n

Hydraulic elevators are well-suited for various spaces and applications due to their specific features and capabilities. Here\u2019s a breakdown of the types of spaces and applications where hydraulic elevators are appropriate:<\/p>\n

<\/span> Short and Mid-Rise Buildings:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 Hydraulic elevators are particularly suitable for buildings with a low to mid-rise number of floors (typically up to 6 floors). The hydraulic system, due to its height limitations, is not ideal for tall buildings.<\/p>\n

<\/span> Small Residential and Commercial Buildings:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 Hydraulic elevators, due to their lower installation and maintenance costs, are appropriate for small residential and commercial buildings. They efficiently meet the vertical transportation needs in these structures.<\/p>\n

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<\/span> Industrial Buildings:<\/strong><\/span><\/h3>\n

\u00a0 \u00a0In industrial buildings where heavy loads and equipment need to be moved, twin post hydraulic elevators are highly suitable. These elevators handle heavy loads effectively and offer high stability.<\/p>\n

<\/span> Multi-Story Parking Lots:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 Hydraulic car elevators are especially suitable for multi-story parking lots. These elevators can safely and efficiently move vehicles between floors.<\/p>\n

<\/span> Historic Buildings:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 For historic buildings where structural changes need to be minimized and installation space is limited, hole-less hydraulic elevators are ideal. These systems do not require deep pits and can be installed with minimal disruption.<\/p>\n

<\/span> Auto Repair Shops<\/strong>:<\/span><\/h3>\n

\u00a0\u00a0 Hydraulic car elevators are also used in auto repair shops and mechanical workshops. They facilitate the movement of vehicles to various heights and assist in vehicle maintenance and repairs.<\/p>\n

<\/span> Spaces with Limited Installation Area:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 Hydraulic elevators with indirect jacks and telescopic systems are suitable for areas with restricted installation space. These systems require less space for jack installation and perform well in spaces with spatial constraints.<\/p>\n

<\/span> Small to Medium Office Buildings:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 For small to medium office buildings where there is a need for vertical transportation between a few floors, hydraulic elevators can be a good choice. These systems usually offer suitable performance and easy maintenance.<\/p>\n

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<\/span>Features of Hydraulic Elevators<\/strong><\/span><\/h2>\n

The Skad Lift hydraulic elevator has consistently met customer satisfaction due to its unique features. Some of these features include:<\/p>\n

– Easier Installation and Maintenance:<\/strong> The installation and maintenance of hydraulic elevators are generally simpler and less costly compared to traction elevators.<\/p>\n

– Safety<\/strong>: These elevators typically come with good safety systems that reduce the risk of free-fall accidents.<\/p>\n

– Less Space Required:<\/strong> In some cases, hydraulic elevators require less space for installation.<\/p>\n

Overall, the choice of a hydraulic elevator depends on the specific needs of the building and spatial constraints!<\/p>\n

<\/span>Main Components of Hydraulic Elevators<\/strong><\/span><\/h2>\n

Hydraulic elevators, with their various and complex components, each playing a specific role in the proper functioning of the system, are a popular choice in buildings and various environments. Understanding these components and how they work can help in better comprehension and maintenance of these systems. Below, we introduce and explain the main components of a hydraulic elevator:<\/p>\n

<\/span> Hydraulic Pump:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 The hydraulic pump is responsible for pumping hydraulic oil into the cylinder. These pumps are usually electric and convert electrical energy into mechanical energy to pressurize the oil.<\/p>\n

<\/span> Hydraulic Oil Tank:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 The hydraulic oil tank is the storage place for hydraulic oil. It must be large enough to accommodate the required volume of oil. The tank is also equipped with filters to prevent contaminants from entering the hydraulic system.<\/p>\n

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<\/span> Cylinder and Piston:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 The cylinder and piston are the primary components responsible for moving the elevator cabin. Hydraulic oil is pumped into the cylinder, causing the piston to move upward. The piston is directly connected to the elevator cabin, facilitating its movement.<\/p>\n

<\/span> Hydraulic Control Valve:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 The control valve regulates the flow of oil to the cylinder and manages the elevator’s movement. These valves can operate manually or automatically and control the direction of oil flow to the cylinder or back to the tank by opening and closing.<\/p>\n

<\/span> Elevator Cabin:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 The cabin is the enclosure where passengers or cargo are placed and transported between different floors. It is attached to the piston and moves up or down as the piston moves.<\/p>\n

<\/span> Guide Rails:<\/strong><\/span><\/h3>\n

\u00a0\u00a0 Guide rails define the path of the cabin’s movement and prevent it from deviating from its course. These rails are typically made of steel and are installed along the elevator shaft.<\/p>\n

<\/span> Emergency Brake System: <\/strong><\/span><\/h3>\n

\u00a0\u00a0 The emergency brake system enhances safety in hydraulic elevators. It stops the elevator cabin in case of any issues or sudden power cuts, preventing falls or harm to passengers.<\/p>\n

<\/span> Control Unit (Controller):<\/strong><\/span><\/h3>\n

\u00a0\u00a0 The control unit is the “brain” of the hydraulic elevator, managing all operations and functions of the system. It includes electrical circuits and control software responsible for coordinating the various components of the elevator.<\/p>\n

<\/span> Safety Valves<\/strong>:<\/span><\/h3>\n

\u00a0\u00a0 Safety valves prevent excessive pressure in the hydraulic system. They activate in the event of pressure fluctuations, redirecting excess pressure back to the tank.<\/p>\n

<\/span> Ventilation System:<\/strong><\/span><\/h3>\n

\u00a0\u00a0\u00a0 The ventilation system maintains the proper temperature of the hydraulic oil and prevents overheating. It includes fans and radiators to help cool the oil.<\/p>\n

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<\/span>Dimensions of Hydraulic Elevators<\/strong><\/span><\/h2>\n

The standard dimensions of hydraulic elevators vary depending on the type of building and its application. However, there are some general standard dimensions and specifications for hydraulic elevators, which are outlined below:<\/p>\n

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  1. Residential and Small Commercial Elevators:<\/strong><\/li>\n<\/ol>\n

    \u00a0\u00a0 – Cabin Dimensions<\/strong>:<\/strong> For a standard residential elevator, the cabin dimensions are usually 1 meter wide and 1.25 meters deep. These dimensions can be adjusted based on the specific needs of the building.<\/p>\n

    \u00a0\u00a0 – Capacity:<\/strong> The capacity of these elevators typically ranges from 320 to 630 kilograms, which accommodates 4 to 8 people.<\/p>\n

    \u00a0\u00a0 – Door Height:<\/strong> The standard door height is usually 2 meters.<\/p>\n

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    1. Car Elevators:<\/strong><\/li>\n<\/ol>\n

      \u00a0\u00a0 – Cabin Dimensions:<\/strong> Car elevators require larger cabins to provide adequate space for vehicle transport. Typically, cabin dimensions are 2.5 meters wide and 5.5 meters deep.<\/p>\n

      \u00a0\u00a0 – Capacity:<\/strong> The capacity of car elevators can be up to 3000 kilograms or more, depending on the type and size of vehicles being transported.<\/p>\n

      \u00a0\u00a0 – Door Height:<\/strong> The door height for car elevators is usually between 2.1 and 2.5 meters to allow easy entry and exit of vehicles.<\/p>\n

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      1. Hospital Elevators:<\/strong><\/li>\n<\/ol>\n

        \u00a0\u00a0 – Cabin Dimensions<\/strong>: Hospital elevators are designed to accommodate hospital beds, with cabin dimensions typically 1.4 meters wide and 2.4 meters deep.<\/p>\n

        \u00a0\u00a0 – Capacity:<\/strong> The capacity of these elevators ranges between 1600 and 2000 kilograms.<\/p>\n

        \u00a0\u00a0 – Door Height:<\/strong> The door height for hospital elevators is generally 2.1 meters.<\/p>\n

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        1. Freight Elevators:<\/strong><\/li>\n<\/ol>\n

          \u00a0\u00a0 – Cabin Dimensions:<\/strong> Cabin dimensions for freight elevators can vary widely based on the type of cargo and available space. For smaller freight elevators, common dimensions are 1.5 meters wide and 2 meters deep.<\/p>\n

          \u00a0\u00a0 – Capacity:<\/strong> The capacity of freight elevators can range from 1000 to 5000 kilograms or more.<\/p>\n

          \u00a0\u00a0 – Door Height:<\/strong> The door height for freight elevators is usually between 2 and 2.5 meters.<\/p>\n

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          1. Telescopic Hydraulic Elevators:<\/strong><\/li>\n<\/ol>\n

            \u00a0\u00a0 – Cabin Dimensions:<\/strong> The dimensions for telescopic hydraulic elevators depend on their specific type and application and can be similar to those of residential or freight elevators.<\/p>\n

            \u00a0\u00a0 – Capacity:<\/strong> The capacity can also vary based on the specific application and needs.<\/p>\n

            <\/span>Important Points in Determining Hydraulic Elevator Dimensions<\/strong><\/span><\/h2>\n
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            • Local Standards:<\/strong> Local and national standards such as EN81-20\/50 in Europe or ASME A17.1 in the United States must be adhered to.<\/li>\n
            • Specific Building Requirements:<\/strong> Depending on the building’s use, the cabin dimensions and elevator capacity may need to be adjusted.<\/li>\n
            • Space Constraints:<\/strong> The space allocated for the elevator installation must be accurately measured to ensure it matches the elevator’s dimensions.<\/li>\n
            • Accessibility:<\/strong> In buildings that require accessibility for people with disabilities, the cabin dimensions should comply with accessibility laws and regulations.<\/li>\n<\/ul>\n

              Ultimately, choosing the right dimensions for a hydraulic elevator requires consultation with experts and specialized engineers to ensure all building needs and constraints are properly considered.<\/p>\n

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              <\/span>Key Applications of Hydraulic Elevators<\/strong><\/span><\/h2>\n