CS243995B1 - Viskohydraulický generátor - Google Patents

Abstract

The generator of direct current or alternating current of liquid consists of a stator in which a rotor is rotatably mounted, on the circumference of which at least two pockets are formed; the sum of their partial geometric volumes is equal to the geometric volume of the generator. The generator is intended mainly as a supplementary generator for circuits of direct current hydraulic mechanisms and mechanisms with alternating current of liquid.

Description

BACKGROUND OF THE INVENTION The present invention relates to a visohydraulic DC or AC liquid generator for hydrostatic mechanisms.

The DC or AC fluid hydraulic generators hitherto used are essentially of two kinds in terms of the type of energy transferred from the solids to the liquid column. Volumetric generators are known in which they transfer from rigid portions to a column of pressure / potential / energy liquid. The second group consists of centrifugal generators. In them, kinetic energy is transferred from the vanes to the liquid column. Both groups of generators have some of the following disadvantages. Volumetric generators are characterized by a complex kinematic structure. They are noisy and the magnitude of their current can be controlled by changing the size of the geometric volume, further increasing the kinematic complexity. Another method of controlling the amount of current is to branch the current between two or more hydraulic resistors. This second method of controlling the fluid flow is energy-disadvantageous because part of the generator power is converted to heat. Centrifugal generators have a much simpler structure than volumetric generators. However, they operate with lower efficiency and have a softer tp - Q characteristic, expressing the dependence of pressure increase on the liquid flow. Kinematic simplicity also reduces noise. Liquid flow control is primarily possible by branching, ie at the cost of energy loss.

243 995

The viscohydraulic DC or AC fluid generator of the present invention primarily removes structural complexity and noise. Its essence consists of a stator in which a rotor is rotatably mounted, on the circumference of which at least two pockets oriented in the same direction are formed, which form liquid wedges allowing pressure to be generated.

According to a further feature of the invention, a suction channel is formed in the stator in which an electric heater is installed, the heat output of which is controlled by a potentiometer.

Finally, it is possible for the pair of pockets to be formed counter-rotating and phase shifted by 180 °.

The basic advantage of the solution according to the invention lies in the structural and technological simplicity, high lifetime, the possibility of continuous regulation of the fluid flow size at a constant rotor rotation speed and at a constant geometric volume of the visohydraulic generator. The variable parameter determining the magnitude of a liquid stream is its viscosity, which is dependent on the temperature of the liquid. Another advantage of the solution is quiet operation.

An example of a possible arrangement is in Figs. 1 and 2, where is a stator and 2 is a generator rotor · An electric heater 4 is built in the suction channel 4. The potentiometer% allows to control the electric current intensity. The discharge channel is indicated by 6. In FIG. 2, the electric heater 4 ^{and the} potentiometer 5 are not shown, since the visco-hydraulic generator does not. it should find use with two counter-rotating pockets • in alternating-fluid hydraulic mechanisms where liquid-flow control is not used.

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The visco-hydraulic generator of Figures 1 and 2 operates as follows. The rotor 2 is driven, for example, by an electric motor, which is not shown in FIGS. 1 and 2. Rotation of the rotor 2 results in internal friction in the liquid and as a result the liquid is carried to the discharge channel 6. The magnitude of the liquid flow depends on the peripheral speed of the rotor 2, the dimensions, in particular the pockets depth. liquid viscosity. By varying the viscosity of the liquid, for example by increasing its temperature, it is possible to influence the liquid flow supplied by the generator at a given rotational speed of the rotor 2. For this purpose, an electric heater 4, whose power <can be controlled by changing the value of the resistance potentiometer 5, is included in the suction channel J ·

The viscohydraulic generators achieve sufficiently high pressures, of the order of MPa, to be used in low power hydraulic mechanisms of the order of 10 W. When used in branching flow control mechanisms, they do not require an overflow valve. The viscohydraulic generator may be an alternating fluid source in conjunction with the engine, Fig. 2, in which case the rotor 2 of the generator has only two pockets 18,8 which are phase shifted by 180 °.

Claims (3)

1. A visco-hydraulic generator of a direct or alternating current of liquid, characterized by the fact that it consists of a stator (1) in which it is? a rotor (2) is rotatably mounted on the periphery of which at least two pockets (7, 8) are formed, the sum of their partial geometric volumes being equal to the geometric volume of the visohydraulic generator. 2. A viscohydraulic generator according to claim 1, characterized in that a suction channel (3) is provided in the stator (1), in which an electric heater (4) controlled by a potentiometer (5) is built. Viscohydraulic generator according to Claims 1 and 2, characterized in that the pair of pockets (7.8) is phase shifted by 180 °.