Vibration Isolator System for Rotary Wing Aircraft Seats

Abstract

The invention is a vibration isolator (10) system that improves comfort and health by reducing vibrations experienced by pilots of rotary-wing aircraft. Based on the Quasi-zero Stiffness principle, the system has a honeycomb structure (20) consisting of hexagonal cells (30). Each cell (30) contains an internal damping element (31), a cage structure (32) and damping caps (33). Supported by layers of wool (41), sponge (42) and plate (43) that evenly distribute the pilot's weight, this design ensures effective isolation of low-frequency vibrations. It aims to improve flight safety and comfort by reducing the physical discomfort experienced by pilots during long flights. Figure 1

Description

1 TARIFF Vibration Isolator System for Rotary Wing Aircraft Seats TECHNICAL AREA 5 The invention provides a vibration solution for pilots of rotary-wing aircraft, especially helicopters. It relates to an improved vibration isolator system designed to provide isolation. The invention, in particular, can be easily integrated into a helicopter pilot's seat, reducing vibration and shock. It relates to an improved vibration isolator system designed to provide isolation. PREVIOUS TECHNIQUE The current cushions used in helicopters to ensure pilot comfort are 15. It is usually made of polyurethane, foam, or similar materials. However, this Systems alone do not provide effective isolation of vibrations. This also Long flights can lead to back pain, muscle injuries, and other health problems. This can lead to significant damage to the pilots' spine and muscular systems due to vibrations. High-frequency vibrations, especially those experienced along the Z-axis, can cause serious health problems. This leads to... In the previous technique, polyurethane or used for helicopter pilots... Cushions made of foam are not sufficient to reduce vibrations. As a result of the patent search conducted in the literature, patent number US10206512B2 was found. It has been determined. The patent aims to increase comfort by reducing pressure on the body. 25 The text describes a seat cushion design with a honeycomb structure. The aim is to increase building comfort, but not for vibration or shock damping purposes. It does not involve a special structure. Furthermore, it is not exposed to low-frequency vibrations like a helicopter. It is not designed for use in the remaining vehicle seats. KR101948506B1 Patent number 30 describes a honeycomb structure to support the body of the person sitting in it. It refers to a cushion design that has a certain vibration resistance. It does not have shock absorption properties. Shuai G., et al. (2023), A quasi-zero- stiffness elastic metamaterial for energy absorption and shock attenuation, In studies cited in Engineering Structures, a semi-zero hardness 4 is also mentioned. 2 A scientific study on a surface prismatic cellular vibration isolator. They have done so. However, the study they conducted, like this study, involved six gene-shaped structures. It is not honeycomb-shaped, multilayered, or composite in structure. In conclusion, the problems mentioned above, which cannot be solved with current technology, are related to the 5 issues. This has made it necessary to make an innovation in the technical field. A BRIEF DESCRIPTION OF THE INVENTION The present invention aims to eliminate the aforementioned disadvantages and the related technical 10 a design developed for rotary-wing aircraft to bring new advantages to the field It is related to vibration isolator systems. The main purpose of the invention is to transmit low-frequency (4-8) signals to helicopter pilots via the seat. An effective 15-inch tube against high vibration levels, especially vibrations of the specified frequency (Hz). to provide isolation and thus reduce the risk of health problems for pilots by making them comfortable The goal is to offer a flight experience. Another aim of the invention is to minimize vibrations transmitted to the spine, thereby reducing back pain. The risk of developing health problems such as back injuries and disc degeneration is 20 to reduce. Another aim of the invention is to achieve up to 56% reduction in vibrations in high-vibration directions such as the Z-axis. to achieve a reduction and also to lower vibration levels by 32% in the X and Y axes. to reduce. 25 Another aim of the invention is to reduce the pilot's physical fatigue and the vibrations he is exposed to. by reducing related disturbances, preventing loss of concentration during flight and flight The goal is to increase security. Another aim of the invention is to create a structure that can be easily integrated into helicopter pilot seats. The goal is to create a mattress with vibration isolators. 3 All the purposes mentioned above and those that will emerge from the detailed explanation below. The present invention aims to create a pilot for rotary-wing aircraft. It features a vibration isolator that can be integrated into the seat and utilizes Semi-Zero Stiffness technology. It has a honeycomb structure made up of multiple hexagonal cells. It is characterized by 5. The best way to utilize the advantages of the existing invention, together with its structure and additional elements. For understanding, it should be evaluated together with the figures explained below. is necessary. BRIEF DESCRIPTION OF THE FIGURES 10 Figure 1 shows a perspective view of the honeycomb structure of the vibration isolator, which is the subject of the invention. It is the appearance. Figure 2 shows the detail of the cell structure within the vibration isolator, which is the subject of the invention. It includes their appearances. 15 Figure 3 shows the disassembly of the cell structure inside the vibration isolator, which is the subject of the invention. It is the appearance. Figure 4 shows a representation of the cushion structure containing the vibration isolator, which is the subject of the invention. It is the appearance. REFERENCE NUMBERS Vibration isolator Honeycomb Structure Cell 25 31 Damping Elements 32 Lattice Structure 33 Damper Top Header 34 Damping Subheading 40 Cushions 30 41 Wool 42 Sponges License Plate 43 4 DETAILED DESCRIPTION OF THE INVENTION This detailed explanation aims to provide a better understanding of the innovation in the invention. This is explained with examples that will not create any limiting effect. This invention is a honeycomb structure (20) 5 that can be integrated into the helicopter pilot seat. It offers a vibration isolator (10). As seen in Figure 1, the honeycomb structure (20), It consists of multiple layers made up of hexagonal cells (30) and each The cell (30) is specifically designed to isolate vibrations. The main invention The technology is based on the Quasi-zero Stiffness principle for vibration. It is insulation. The Semi-Zero Hardness insulation system increases the load-bearing capacity and 10 to improve deformation resistance, and Linear technology with low dynamic stiffness characteristics that can reduce the natural frequency of the system. It is a non-vibration isolation structure. This structure is produced using a 3D printer. Vibration The main material used in the construction of the insulator (10) is thermoplastic polyurethane (TPU). It has been preferred as follows: 15 As seen in Figure 1 and Figure 2, the basic building block of the vibration isolator (10) is The honeycomb structure (20) consists of hexagonal shaped cells (30). These cells (30), This allows the vibrations to be damped in different directions along each axis, and the helicopter It effectively dissipates and reduces vibrations encountered during flight. The geometric structure of the hexagonal cells (30) affects the energy density of the vibrations of the cells 20 (30) allows for homogeneous distribution among the honeycomb. Each cell (30) in its structure (20) has an internal damper with vibration absorption capacity. It is equipped with elements (31). The mentioned damping elements (31) are the cells (30) It absorbs the vibrational energy within it, preventing the vibrations from spreading. Damping elements (31) reduce low frequency vibrations (especially in the 4-8 Hz range) 25 They are specially selected to ensure absorption. Damping elements (31), To ensure that the vibrations are distributed effectively between the cells (30) It is surrounded by a lattice structure (32). The lattice structure (32) has a hexagonal form. the connection of the cells (30) to each other and the isolation of vibrations in each cell (30) It guarantees that the internal damping elements (31) lattice structure (32) 30 a damping top cap (33) and a There is a damping subheading (34). As shown in Figure 4, the vibration isolators (10) are attached to the seat cushion (40) integration of wool (41), polyurethane foam (42) and plate (43) layers respectively This is achieved by placing the plate (43) and polyurethane foam (42) on it. It forms the support structure of the vibration isolator (10) and supports the entire weight of the pilot. It ensures that the wool spreads evenly into the cells (30). The resulting cushion (40) is made of wool 5 (41) part on top and vibration isolator (10) in contact with the seat surface Wool (41) is used as a natural vibration damper and It increases the pilot's comfort during long-haul flights. Wool (41) material, both effective reduction of vibrations and provision of ventilation It is helpful. 10 Vibration isolator (10) to both increase comfort and protect pilot health It has been designed. The insulator (10) has high static stiffness and low dynamic stiffness properties. Thanks to this, it effectively isolates vibrations and prevents them from reaching the pilot's spine. It minimizes vibrations. In experimental tests, a 15-degree rotation in the Z-axis... Measurements showed a 56% reduction in vibrations, and a 32% reduction in the X and Y axes. A decrease in the rate has been observed.

Claims

6 REQUESTS 1. A vibration system that can be integrated into a pilot's seat for rotary-wing aircraft. Its feature is that it is an insulator (10); it is a multi-hexagonal 5 produced with Semi-Zero Hardness technology. It has a honeycomb structure (20) consisting of (30) cells.

2. A vibration isolator (10) conforming to Claim 1, whose characteristic is that the mentioned cells (30) a damper that absorbs vibration energy and prevents the propagation of vibrations element (31) surrounds the aforementioned damping element (31) and reduces vibrations by 10 a lattice structure (32) that enables the cells (30) to distribute effectively among themselves and the most that enables the damping elements (31) to be fixed to the lattice structure (32) It contains a small damping head (33, 34).

3. A vibration isolator (10) that meets any of the above requirements and has the characteristic of 15 It is made of thermoplastic polyurethane material.

4. A vibration isolator (10) that meets any of the above requirements and has the following characteristics: It is produced using a 3D printer.

5. A vibration isolator (10) that meets any of the above requirements and has the following characteristics: Its purpose is to provide low-frequency (4-8 Hz) vibration isolation.

6. A vibration isolator (10) that meets any of the above requirements pilot seat cushion (40). 25 7. A pilot seat cushion (40) conforming to claim 6, whose feature is wool (41), respectively. It includes polyurethane foam (42), plate (43) and vibration isolator (10).