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This section provides an overview for oil dampers as well as their applications and principles. Also, please take a look at the list of 13 oil damper manufacturers and their company rankings. Here are the top-ranked oil damper companies as of December, 2024: 1.Dongguan Longji Plastic Electronic Co.,Ltd, 2.Xiamen Jingzhong Mold Co., Ltd., 3.Suzhou Texun Precision Machinery Co., Ltd..
Table of Contents
An oil damper is a device that uses the viscosity of oil to absorb vibration and shock. An oil damper contains oil and a piston. The piston has a small valve, and when the piston moves due to vibration, the oil moves through this valve.
The viscous resistance through the valve converts the vibration energy into thermal energy, thereby suppressing vibration. Oil dampers are used for vibration isolation and control in buildings, and for vibration and shock absorption in automobiles and other vehicles.
Oil dampers are used for earthquake resistance in buildings and for general vibration and shock control. The most common architectural application is earthquake protection for high-rise buildings and general buildings. Oil dampers are used in seismic isolation structures, which separate the building from the ground to prevent seismic shaking from being transmitted to the building, and in vibration control structures, which absorb shaking in the event of an earthquake.
In high-rise buildings, swaying of the upper floors, especially due to long-period vibrations, can affect the human body and cause objects in the interior to fall or break. For this reason, seismic isolation and vibration control structures are used. Small vibration dampers are also used in buildings such as houses and offices at the connections between components.
Oil dampers are also used in seismic devices for piping and boilers in power plants and plants. Nuclear power plants, in particular, require a high level of safety, and the latest damper devices are used.
In automobiles and other vehicles, oil dampers are incorporated into the suspension system. They are also called shock absorbers. It is an important component that determines driving stability and ride comfort. Most are installed in the center of a coil spring, and the damper dampens and converges the vibration of the spring.
An oil damper consists of a cylinder containing a piston, rod, and oil. The piston has a small-diameter valve, and vibration causes the oil on both sides of the piston to move repeatedly through the valve.
As the viscous oil moves back and forth through the valves, the kinetic energy of the vibration is converted into thermal energy, thereby reducing vibration. There are many types of oil dampers, including bi-flow and uniflow types for construction and industrial applications, and automotive applications.
This is a system in which the direction of oil flow in the cylinder changes when the oil damper is extended or retracted. Two check valves are used for the piston valves, and the piston rods are attached to both sides of the piston in order to equalize the volume on both sides of the piston. This type has no restrictions on the mounting angle and is used in dampers.
This is a method in which the direction of oil flow in the cylinder does not change when the oil damper is extended or retracted, making the configuration a little more complicated. The cylinder is doubled and combined with both sides of the piston to form three chambers.
Each chamber is connected by a one-way valve, and oil flows in only one direction. The piston rod only needs to be in one direction, thus reducing the overall size. Since the outer chamber has an air layer, it must be used horizontally and is used for seismic isolation of buildings.
Automotive oil dampers are also available in mono-tube and twin-tube types, and can be used in the vertical direction. When the back side of the piston is under negative pressure, the oil foams, so nitrogen gas is filled to increase the pressure. The mono-tube type has the advantage of a larger piston diameter, but has the disadvantage of a longer overall length due to the coaxial arrangement of the gas chamber. The twin-tube type is the mainstream for general automobile suspensions.
Seismic isolation structure separates the building from the ground so that seismic shaking is not transmitted to the building. Uniflow type oil dampers are installed horizontally between the ground and the building. In addition to the oil damper, isolators such as high-damping laminated rubber are used to support the building.
When an earthquake occurs, the seismic energy input to the building is absorbed by the oil damper, reducing the shaking of the building. Compared to vibration control structures, the intensity of shaking is greatly reduced, which not only prevents damage to the building but also allows the building to maintain its functionality after an earthquake.
A vibration control structure is a device designed to absorb the shaking caused by an earthquake. Bi-flow oil dampers for vibration control are attached directly to walls and columns to absorb the energy of seismic shaking. In high-rise buildings and condominiums, they are installed on each floor to reduce the swaying of high-rise floors that are prone to swaying. Often installed diagonally like a brace, they are designed to handle vertical as well as horizontal shaking.
Because it is a compact device, this method requires only a few missing points in the insulation material and has a small effect on insulation performance. For this reason, installation in ordinary houses, such as wooden houses, is also being promoted.
*Including some distributors, etc.
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Fuji Latex was founded in 1949 and is a manufacturer of latex products based in Chiyoda, Tokyo, Japan. The company is split into two division, the Motion Control Technology and Healthcare products. Motion Control Technology division produces shock absorbers, rotary dampers, and vane dampers. These products are used in various applications such as industrial systems, automotive interiors, and healthcare. Healthcare division manufactures various latex products such as condoms, probe covers, and lotion. The company has obtained the vertifivcation of ISO 9001, ISO 14001, and ISO 13485.
Howa Machinery Ltd, established in 1907 and based in Aichi, Japan, is a manufacturer of machine tools and other equipment. The company engages in the manufacturing and sale of equipment for diverse markets, with a primary emphasis on machine tools. This product line includes transfer machines, flexible transfer lines (FTL), and flexible manufacturing systems (FMS). The company also offers pneumatic and hydraulic equipment, electronic machines tailored for the IT sector, and firearms. The company's Type 64 rifle and Type 89 rifle have been adopted as the official equipment by the Japan Defense Agency (Ministry of Defense).
Sanwa Tekki Corporation, founded in 1907 and headquartered in Tokyo, Japan, is a manufacturer specializing in metal fittings and devices for various applications. Its product range includes railroad wires (catenary), high-voltage power lines, and power plant piping systems. Key products include catenary equipment, high-voltage power line fittings, power plant piping support systems for managing thermal expansion and seismic events, dampers for thermal power generation, and equipment for Shinkansen (bullet trains). The company holds ASME certification and serves the railway and electric power industries. Its products play crucial roles in supporting infrastructure and transportation systems.
Ideal Gas Springs PVT. LTD, established in 2004, is a manufacturer, supplier, and exporter of gas springs and dampers for Indian and overseas automobiles, industrial equipment, hospital furniture, passenger seats, and chair industries. The company is situated in Satara, Maharashtra, India, and is also a designer of customized gas springs tuned to the specific application. They manufacture two types of gas springs: non-lockable and lockable. The company was recognized by the Government of Maharashtra District Level Second Prize for the Small scale Industries in the year 2013.
Dongguan City Zhili Gas Spring Co., Ltd, established in 2008, is a manufacturer of support rods, pulling force, damper, and controllable gas spring series used in automobiles, furniture, industry, food, and marine. The company is based in Guangdong, China, and is a cooperative partner with enterprises such as Huawei, LG, Kyocera, Sharp, and Changhong. They manufacture gas springs, including gas lifts, traction, self-locking, and adjustable gas springs. They also have an oil damper product line, including plastic and metal dampers ideal for use in nuclear power, steel, petrochemical, and other fields.
DICTATOR Technik GmbH, established in 1932 and based in Augsburg, Germany, is a manufacturer of metal products. The company produces products such as lift equipment, door-closing solutions, interlock systems, drives, and gas springs worldwide; with a base in 22 countries and production facilities in Germany, Spain, England, and the Netherlands. Besides this, the company offers door control solutions, hydraulic dampers, and gas springs. At the production site of the company, various tests, such as stress tests and endurance tests are conducted on every product made.
Senqcia Corporation, founded in 1972 and headquartered in Tokyo, Japan, is a manufacturer and distributor specializing in building structural components. Its product portfolio includes pioneering raised floor systems, developed with advanced technology since the 1960s, providing free-access flooring solutions. It also offers structural products like HIBASE and HIRING, along with dampers, crucial devices for mitigating oscillatory or vibratory motions. The company's solutions play an essential role in ensuring safety and security in building structures, whether in underground foundations, steel frames, or under floorings.
Copperfield Chimney Supply, established in 1991, is a supplier of chimney and hearth products headquartered in Scranton, Pennsylvania and with additional locations in Bridgeport, NJ, Cleveland, OH, and Reno, NV. The company’s product portfolio comprises caps & dampers, chimneys & stovepipes, relining & venting supplies, and hearth appliances & accessories used in residential and commercial settings. They also offer various servicing supplies such as silicone, sealant caulk, chimney cleaning rods, dryer wall vents, and soot suits. They supply products from companies such as Modern Flames, Ventis, Napoleon, DuraVent, and Selkirk.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Dongguan Longji Plastic Electronic Co.,Ltd |
13.6%
|
| 2 | Xiamen Jingzhong Mold Co., Ltd. |
13.6%
|
| 3 | Suzhou Texun Precision Machinery Co., Ltd. |
9.1%
|
| 4 | DICTATOR Technik GmbH |
9.1%
|
| 5 | IDEAL GAS SPRINGS PVT. LTD. |
9.1%
|
| 6 | Copperfield Chimney Supply |
9.1%
|
| 7 | Sanwa Tekki Corporation |
9.1%
|
| 8 | SENQCIA CORP. |
9.1%
|
| 9 | Howa Machinery, Ltd |
9.1%
|
| 10 | Dongguan City Zhili Gas Spring Co., Ltd. |
4.5%
|
Derivation Method
The ranking is calculated based on the click share within the oil damper page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
6 | 50.0% |
|
China
|
4 | 33.3% |
|
India
|
1 | 8.3% |
|
Germany
|
1 | 8.3% |
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