In the past two years, cars have gradually entered the homes of ordinary people. Before that, people's requirements for cars may be just a simple means of transportation. Nowadays, people are increasingly demanding safety, comfort and fuel economy. .
As the only part of a car that comes into contact with the ground, the quality of the tire will directly affect the safety of the vehicle. We can often see traffic accidents caused by punctures in the news.
There are many factors that cause puncture. When the tire pressure is too high, the pressure on the unit area of ​​the tire increases, the tread wears unevenly, and the sidewall will become thinner due to excessive air pressure. It is easy to have a puncture accident when it comes to bumps or potholes. When the tire pressure is too low, the tire will deform obviously. The shoulders touch the ground. This deformation makes the tires rotate unevenly, especially Friction between the wire and the cord layer inside the tire generates a large amount of heat, which accelerates the aging of the tire and causes a puncture. Another reason is the foreign body puncture. When the car is driving at high speed, it is puncture by the object, which causes the puncture to be common.
Maybe you will say: Turning a pneumatic tire into a solid tire will not cause a puncture. It is not afraid of nailing. You don’t have to worry about leaking, check the tire pressure. How good, It is safe and easy. Since there are so many advantages in solid tires, why do car manufacturers not use solid tires?
In fact, if the tires are made solid, it will not save trouble and is not safe. Today, Xiao Meng refers to the following points to talk to you about why the tires are not solid.
1, security
For a car that takes us to the "far", its safety is definitely the primary consideration, while solid tires are not as safe as pneumatic tires because solid tires are more prone to standing waves.
What is standing wave phenomenon?
We all know that the weight of the car will cause a slight deformation of the tire and the part that touches the ground, and when the vehicle is running, the deformed part will be restored to its original state without pressure. If you look at this point on the surface and the tire rotates for one week, this point will produce a process of deformation and recovery. Although the speed of deformation and recovery is very fast, it takes time. When the vehicle is driving at a high speed, the speed at which the tire rotates one week will be very fast. Generally, the tire of the car will rotate about 16 times per second at a speed of 120 km/h! If the speed of tire recovery cannot keep up with the tire speed, it will cause standing wave phenomenon of abnormal deformation.
The standing wave phenomenon will cause the tire to repeatedly and excessively deform, which will cause the tire to be heated rapidly by the intense friction. The abnormal high temperature and abnormal deformation will separate the structural layer of the tire from the rubber layer, which will eventually lead to a puncture accident. Due to some physical characteristics, solid tires are more prone to standing waves than pneumatic tires. At high speeds, solid tires can be broken due to this standing wave phenomenon, which is very dangerous.
2, handling
The controllability of a car is also an important factor that indirectly affects car safety. The solid tires will increase the unsprung mass of the car and greatly reduce the handling of the vehicle.
What does unsprung mass mean? Why does it affect the handling of the vehicle?
For a car, we can divide it into two parts: unsprung mass and sprung mass. The definition of unsprung mass refers to the mass not supported by the elastic elements in the suspension system, generally including wheels, springs, shock absorbers and other related components, and the sprung mass is naturally the quality of the rest of the vehicle, generally including the car. Rack, power system, transmission, occupants, etc.
We do not consider the suspension setting and other factors, from the perspective of the ratio of the sprung mass to the unsprung mass, the larger the ratio, the better the ride comfort and the smaller the spring. The lower mass also means that the suspension system has better dynamic response and vehicle handling. However, since solid tires are denser and heavier than pneumatic tires, the use of solid tires will inevitably increase the unsprung mass, which in turn will affect the overall handling of the vehicle.
3, comfort
The comfort is well understood. Hard rubber tires have almost no comfort. Even if it is filled with some soft rubber, it is not as effective as the bumping of the pneumatic tires. If you open a solid tire on a country road or a stone road, the feeling is absolutely "sour"!
4, high fuel consumption
As a domestic scooter, the fuel cost is almost the largest cost of car maintenance, and the solid tires are not only uncomfortable due to their greater quality, but they are also more expensive and naturally more expensive. It is.
Whether for safety reasons or comfort and economy, solid tires are not as good as pneumatic tires. But solid tires also have the advantage that at low speeds, its safety, durability and load index are higher than inflatable tires, so some industrial vehicles, military vehicles, construction machinery, trailers at port airports This kind of solid tire will be used.
Yesterday, my colleague took everyone to understand the future tire technology (there is a link in the lower part of the article), which is a more feasible concept tire, but when walking on some gravel roads, dirt roads and wading On the road surface, this structure will not cause normal deformation of the wheel due to the presence of some debris in the gap, and the safety and comfort cannot be guaranteed.
The Multiple Power Selection Column Loudspeaker Series which produce good clear sound and acoustical clarity for background music and paging,are suitable for indoor and outdoor applications such as stations, gardens, swimming pools,stadiums, and tennis courts, etc.
Even in extreme weather conditions, the all metal extruded aluminum alloy enclosure with cast aluminium top and bottom plates are fully dust and weatherproof
Column Speaker,Column Speakers,best column speakers,column speaker system,Aluminium Alloy Outdoor Column Speaker
Taixing Minsheng Electronic Co.,Ltd. , https://www.ms-speakers.com