A combine one object with another by lifting force to offset its weight.
Example: hydrogen balloons hold up billboards.
B. The object interacts with the medium (preferably aerodynamic force and hydraulic pressure) to counteract its weight.
For example, "A brake centrifugal regulator for regulating the number of revolutions of a rotor wind turbine is installed on the vertical shaft of the rotor. It is characterized in that in order to control the rotor speed in a small range of revolutions when the wind force increases, the centrifugal blades of the regulator are made into blades to ensure pneumatic braking "(Soviet invention certificate 167784).
Interestingly, the contradiction overcome by the invention is clearly reflected in the invention formula. Under the condition of given wind force and given centrifugal mass, a certain number of revolutions can be obtained. In order to reduce the number of revolutions (when the wind force increases), it is necessary to increase the mass of centrifugal thin plates. But the centrifuge is spinning and it is difficult to get close. So the contradiction is eliminated, and the centrifugal blade has the shape of qigong braking, that is, the centrifugal blade is made into a wing with negative angle of attack.
TRIZ theory solution principle:
Principle is the general law that should be followed to obtain conflict resolution. TRIZ mainly studies technical conflicts and physical conflicts. Technical conflict refers to the compromise in traditional design, that is, due to the influence of a certain part of the system itself, it cannot reach the required state. Physical conflict means that an object has opposite needs.
TRIZ guides designers to choose principles that can solve specific conflicts, and its premise is to determine conflicts according to standard engineering parameters. There are 39 standard conflicts and 40 principles that can be applied.
The general idea is obvious: if the mass of a rotating object needs to be changed, but its mass cannot be changed according to certain requirements, then the object should be wing-shaped, and the additional force in the required direction can be obtained by changing the inclination angle of the wing movement direction.