RU2549782C1 - Mechanical power amplifier - Google Patents

Abstract

FIELD: power industry.

SUBSTANCE: invention relates to mechanical power amplifiers and can be used in power plants. The power amplifier contains a base, a cranked shaft connected by means of a rod with knee levers and a sliding bar. The sliding bar has a possibility to back and forth motion and is connected from the one side with one knee lever. The movement conversion mechanism is kinematically interfaced with the sliding bar from its another side. The named mechanism has an output shaft. Another knee lever is kinematically interfaced to the platform placed on the base with a possibility of movement parallel to or along an axis of the sliding bar movement.

EFFECT: transmission of increased power generated on the sliding bar for its transmission to another mechanism is provided.

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Description

The invention relates to mechanical engineering, energy, namely, to enhance the power of sources of mechanical energy.

Known mechanical power amplifier according to the patent of the Russian Federation No. 2407638.

The known and claimed invention has the following matching features, such as a base, a crankshaft that is connected via a connecting rod to the knee levers, a slider that can reciprocate and is connected on one side with one knee lever and with the other on the mechanism conversion of motion with the output shaft.

A disadvantage of the known mechanical power amplifier is that it has a low gain.

This drawback is due to the fact that one of the knee levers of the known mechanism is kinematically connected to the base.

The objective of the invention is the creation of such a design of a mechanical amplifier, which would allow you to have a gain several times greater than the gain of the known invention.

To achieve this goal, the claimed invention "Mechanical power amplifier" contains a base, a crankshaft that is connected via a connecting rod to the knee levers, a slider that can reciprocate and connected on one side with one knee lever, as well as a conversion mechanism having an output shaft the movement of the slider kinematically coupled with it from its other side. The mechanical power amplifier, in addition, is equipped with a platform kinematically coupled to another knee lever, located on the base and configured to move in it parallel to or along the axis of movement of the slider.

In relation to the known mechanism, the claimed invention has distinctive features, namely, that the mechanical power amplifier is equipped with a platform kinematically coupled to another knee lever, placed on the base and configured to move in parallel or along the axis of movement of the slider.

Between the distinguishing features and the object of the invention, there is the following causal relationship. In the claimed invention, in order to increase its gain, the knee lever of the mechanism kinematically connected to the base in a known mechanism is kinematically connected to a platform, which is placed on the base with the possibility of moving in it along the direction of movement of the slider. This allows, on the one hand, to perceive the action of the amplification object on the slider, and on the other hand, to perceive the pressure of an external force acting on the platform, and transmit this action using the knee-lever mechanism of the amplifier to the slider, which moves at a given speed. The product of the magnitude of the force allocated on the slider and its speed corresponds to a several-fold increase in the power at the output link of the amplifier. The value of the power gain is determined from the ratio of the average value of power allocated on the slider to the average value of power allocated by the amplification object. The action of the amplification object during the operation of the amplifier will be aimed at overcoming the friction forces at the points of kinematic connections of its links. By selecting the parameters of the knee-lever mechanism, choosing the type of friction at the points of kinematic connections, as well as the design of the slider and its guides, it is possible to achieve a certain value of the gain of the proposed mechanical power amplifier.

The invention is illustrated by graphic materials, which depict:

figure 1 - diagram of a mechanical power amplifier;

figure 2 - the effect of forces on the links of the amplifier;

figure 3 - figure to calculate the gain of the amplifier.

The mechanical power amplifier consists (see Fig. 1) of base 1, platform 2, crankshaft 3, connecting rod 4, knee levers 5 and 6, slider 7 and movement conversion mechanism 8 with output shaft 9. The amplification object 10 is also shown in the drawing. .

To describe the operation of a mechanical power amplifier, we consider the forces acting on the links of the amplifier. Turn to figure 2. The external force F _in exerts constant pressure on the platform 2, while during the operation of the amplifier on the slider 7 under the load F _{c the} force F _n will be released, which is part of the external force F _c . In this case, the force F _n will be equal to

F _n = F _in1 cos ² α,

where F _in1 - part of the external force F _in ;

α is the angle of inclination of the knee levers with equal lengths.

At the same time, the force of the amplification (drive) object F _ave . Will be applied to the hinge connecting the levers 5 and 6. Since, according to the condition of the problem, the operation of the drive is designed to counter the friction forces at the points of kinematic connections of the amplifier links, the force F _CR , given that the knee arms are equal in length, will be

F _ave = F _TP + _w 2 · tgα · F _{TP n,}

where F _{TP W} - the total friction force in the joints of the knee-lever mechanism of the amplifier;

F _{Tr n} - the friction force in the guides of the slider 7.

Opening the values of the friction forces in the last equation, we have the magnitude of the force F _p in the following form

_Prosp F = 3 · f _w · F _c1 · cosα + _c1 · F 2 _{· f n · tgα · sinα ·} ( 1 + 2 · k _n / l _n),

where f _W - coefficient of friction in the joints of levers 5 and 6;

f _n - coefficient of friction in the guides of the slider 7;

k _n - the departure of the slider 7;

l _n - the distance between the supports of the guides of the slider 7.

To calculate the gain k _{y of a} mechanical power amplifier, we turn to figure 3. The distance h corresponds to the stroke t _{px of the} slider 7, to which the force F _n is applied. The distance s corresponds to the path covered in one working stroke of the slider of the point of application of force F _pp . In accordance with the accepted notation, the value of the gain in general will be equal to

. $$k_y=\frac{F_n\cdot h\cdot t_{px}}{F_{PR}\cdot s\cdot t_{px}}$$

.

Expressing the last formula in terms of the parameters of the amplifier mechanisms, we obtain the formula for calculating the gain k _{y of a} mechanical power amplifier in the form

, $$k_y=\frac{2\cdot {\cos }^2\alpha \cdot (\mathrm{one}-\cos {\alpha }_{\max })}{\left[3\cdot f_w\cdot \cos \alpha +2\cdot f_n\cdot tg\alpha \cdot \sin \alpha \cdot (\mathrm{one}+2\cdot k_n/l_n)\right]\cdot \sin {\alpha }_{\max }}$$

,

where α _max is the maximum angle of deviation of the levers.

An analysis of the formula for determining the gain k _y shows that its value varies depending on the choice of the type of friction in the hinges and guides of the slider 7, as well as the design of the slider 7 and its guides, and lies in the range k _y = 3.6-42.

When comparing the values of the gain of the known and proposed mechanical power amplifier, we see that the gain of the proposed mechanical power amplifier can be more than 15 times higher than the gain of the known mechanical power amplifier.

The operation of a mechanical power amplifier is as follows.

Platform 2 is acted upon by an external force, the nature of which may be different. The pressure of this force through the platform 2, which can move parallel or along the axis of movement of the slider 7, through the levers 5 and 6 extends to the slider 7. In this case, the movement of the platform 2 towards the slider 7 is limited by the base 1, the amplification Object 10, while being the drive of a mechanical amplifier power, rotates the crankshaft 3, which through the connecting rod 4 and the knee arms 5 and 6 informs the slider 7 reciprocating motion, with working and idling. The working stroke of the slider 7 is associated with the straightening of the knee levers 5 and 6, in which the slider 7 acquires strength and speed. Kinematically coupled to the slider 7, the movement conversion mechanism 8 converts the reciprocating movement of the slider 7 into the rotational movement of the output shaft 9, from which the amplified power is removed for the operation of other mechanisms.

The claimed "Mechanical power amplifier" is of considerable interest, since it allows, without resorting to traditional energy sources, to amplify the power of a mechanical energy source, such as an engine.

The claimed invention is environmentally friendly to nature and humans.

Claims (1)

 A mechanical power amplifier comprising a base, a crankshaft connected by a connecting rod with knee levers, a slider having the possibility of reciprocating motion and connected on one side with one knee lever, and on the other hand, with a motion conversion mechanism having an output shaft, characterized in that it is equipped with a kinematically coupled to another knee lever platform located on said base and configured to move the slider in parallel or along the axis of movement but.

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