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What are the characteristics of a rotary damper? What is the function?

Release time:

2022-11-11 13:57

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In fact, rotary dampers are often seen in our daily life and work. It is suitable for all kinds of mechanical movements that need to be buffered, reducing the friction between equipment and prolonging the service life of products. The rotary damper enables the product to obtain smooth mechanical movement, with one-way buffer and two-way buffer. Generally used for computer optical drive, CD player in and out of the library, notebook computer opening and closing, seat adjustment, mobile phone flip cover, cassette cassette, etc.

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1. Characteristics of the rotary damper

Speed: According to the change of the speed of the rotary damper, the torque also changes. Its change law is: when the speed increases, the torque will increase accordingly. When the speed slows down, the torque also decreases. We should understand that the starting torque is different from the standard torque.

Temperature: The torque of the rotary damper also changes with the air temperature in use. The change law is: the ambient temperature increases, the torque decreases accordingly, the ambient temperature decreases, the torque increases. This is because when the ambient temperature changes, the viscosity of the viscous oil in the damper also changes. However, when the ambient temperature returns to normal temperature, the torque also returns to the original value.

2. The working principle of the rotary damper

uses the viscous oil to brake the rotating parts (resistance). The viscous oil sealed in the body forms a damping force on the movement of the moving parts, and the torque formed is determined by the viscosity of the viscous oil and the contact area of the oil.

3. The role of the rotary damper

One of the advantages of the rotary damper is that the powder formed by the friction between the friction plate and the brake disc will be quickly thrown out, and the heat will be more quickly released by the brake disc Heat dissipation, so as to obtain better braking performance. Drum brakes are obviously relatively weak in this regard. Due to the fast response of disc brakes and high-frequency braking actions, many models use disc brakes to match ABS, VSC, TCS and other systems to meet the needs of such systems. Because of this, many cars are equipped with four-wheel brakes in order to obtain greater braking capacity. Some models will install shock absorbers at the brake caliper, which can effectively control the noise during braking. This noise mainly comes from the vibration generated by the friction between the brake pads and the brake disc, and the increased rotary damper can resolve this part of the vibration. The rotary damper has a closed cavity with an irregular circumferential cross-section, and the cavity is filled with damping grease. When the outer shell or inner core rotates circumferentially, the viscous damping grease is driven to move, forming a circumferential shear force. The application of rotary dampers in automobiles is mainly to use the brake transmission mechanism to make the brake shoes press on the inner brake friction plates, thereby forming braking force, and decelerate the wheels or stop for a short distance as needed to ensure driving and parking. Safe and reliable, not automatically sliding. The rotating element of the drum brake is the brake drum and the stationary element is the brake shoe. Its low cost, in line with the traditional design.

What role does the damper play in the car? What precautions are used?

Some common sense of the damper, rotary damper manufacturers for you