BG112190A - Modified planetary reduction gear - Google Patents

Abstract

The invention is intended for application in the production of propellers, propulsion vessels, air propellers, propulsion aircraft and wind turbines, as through it the diameter of the propellers can be changed in varying loads and speed. It is estimated that by increasing the screw speed, the reducing of its diameter by 5% gives the motor savings of up to 25% and increases the efficiency quotient of the screw. The reduction gear comprises of a carrier (1) which is designed as a cylinder, a central gearwheel (2) made as a shaft which is in kinematic connection with straight slits inside the carrier (1) and external to the central gearwheel (2). When rotating the carrier (1), the central gearwheel (2) is rotated with it, which is axially displaceable relative to the carrier (1) along the longitudinal axis of the reduction gear, under the influence of a module (4) that regulates the axial displacement of the gearwheel (2). A single turn of the carrier (1) around its longitudinal axis results in a rotation of the central gearwheel (2) also by one turn. At the other end of the central gearwheel (2) which is not in kinematic connection with the carrier (1) longitudinal spiral slits are made and by which the central gearwheel (2) is in kinematic connection with an intermediate gear (5.). In its axial displacement along the longitudinal axis of the reduction gear, the central gearwheel (2) forces the intermediate gear (5) to rotate around its own axis, which coincides with the axis of rotation of the gear, which rotation can be both clockwise and counter clockwise. In turn, the intermediate gear (5) is meshed with satellite gears (3) freely rotatable on axles mounted on the carrier (1). 12 claims, 3 figures

Description

(54) MODIFIED PLANETARY REDUCER (57) The invention is intended to be used in the manufacture of propellers, craft propellers, air propellers, aircraft propellers and wind turbines, which can be used to change the diameter of the propeller rotation. them. It is calculated that by increasing the speed of the screw, reducing its diameter by 5% saves the engine up to 25% and increases the efficiency of the screw. The gearbox consists of a guide (1), which is made as a cylinder, a central gear (2) made as a shaft, which are kinematically connected by means of straight slots, internal for the guide (1) and external for the central gear (2). When turning the guide (1), the central shaft (2) rotates together with it, which has the possibility of axial movement with respect to the guide (1) along the longitudinal axis of the gearbox, under the influence of module (4), setting the law of axial moving the shaft (2). One revolution of the guide (1) around its longitudinal axis causes the central shaft (2) to rotate also by one revolution. At the other end of the central shaft (2), which is not in kinematic connection with the guide (1), longitudinal helical slots are made, through which the central shaft (2) is in kinematic connection with an intermediate gear (5.). moving along the longitudinal axis of the gearbox, the central shaft (2) forces the intermediate gear (5) to rotate around its own axis, which coincides with the axis of rotation of the gearbox, and this rotation can be as clockwise arrow and in the opposite direction. In turn, the intermediate gear (5) is engaged with satellite gears (3), freely rotating on axles mounted on the guide (1).

claims,) figures

A declaration for license readiness has been submitted in accordance with Article 30 of the Law on Public Procurement

MODIFIED PLANETARY REDUCER

FIELD OF THE INVENTION

The invention relates to mechanical engineering, is intended to be used in the production of propellers, propellers, aircraft propellers, propellers and wind turbines in wind energy and through it can be changed the diameter of the propellers when changing the load and speed. Various designs of planetary gearboxes are known to be used to change speeds and / or torques when driving machines and equipment.

BACKGROUND OF THE INVENTION

The structural elements of the classic planetary gear are: guide (epicyclic) gear A, central (solar) gear B, satellite gears B and crown D. Guide A is kinematically connected to the solar gear B and the crown D by means of satellite gears B , which rotate freely around axes, which in turn are mounted on the guide A. By holding the movement of one of the elements of the planetary mechanism, a reduction of torques is achieved, and also there is a possibility to reverse the direction of rotation of the input -output shaft. In principle, the gear wheel A is considered to be the input shaft, and the central gear wheel B is considered to be the output shaft.

TECHNICAL ESSENCE

The object of the invention is to provide a mechanism in which the satellite gears are guaranteed to have a simultaneous and synchronous angular deviation around their axes of rotation and at the same time their reliable fixation when reaching the desired position while at the same time they rotate together with the guide 1. For this purpose, the main structural elements of the classical planetary gearbox are preserved, but the output currents of torques and kinematic connections in the planetary gearbox are changed and new functions are acquired, the crown D is removed and module 4 setting the law for axial displacement of the central gear is added. 2 with respect to the guide 1. The guide 1 is made as a cylinder, the central gear 2 is made as a shaft, which is why we will hereinafter call it a central shaft 2 and the two elements are kinematically connected by straight slots. When the guide 1 is rotated, the central shaft 2 rotates together with it, while the central shaft 2 has the possibility of axial movement with respect to the guide 1, along the longitudinal axis of the Modified Planetary Gearbox under the influence of the module 4 At the bottom of the guide 1 (bottom of the cylinder) 1.1 there is an opening in which internal slots are made. External slots are made along the length of the central shaft 2, and at this end, where it kinematically connects to the guide 1, they are straight, with a number and modulus identical to the inner slots made on the bottom 1.1 closing the cylinder of the guide 1, so that when the central shaft 2 is placed in the hole made in the bottom 1.1 of the guide 1, the central shaft 2 can move axially with respect to the guide 1 along the longitudinal axis of the Modified Planetary Gearbox. One

rotation of the guide 1 about its longitudinal axis causes the central shaft 2 to rotate also by one turn. Longitudinal, helical slots are made at the other end of the central shaft 2, which is not in kinematic connection with the guide 1. Through these helical slots, the central shaft 2 is in kinematic connection with the intermediate gear 5 in the center, on which are made internal helical slots with a number and module identical to the number and modulus of the outer slots made on the central shaft 2. On the periphery of the intermediate gear wheel 5 are made of teeth by means of which it is connected kinematically with the satellite gears 3. The satellite gears 3 rotate freely around their axes, which are mounted on the front of the guide 2. The satellite gears 3 can be N number, depends on each specific case of implementation, in turn they can be modified as satellite working modules, on which there are cut external teeth with a step and a module identical to the step and the module of teeth made on the periphery of the intermediate gear 5 and they are in kinematic connection with it. Those parts of the satellite working modules 3, on which straight teeth are not cut and which do not come into contact with the intermediate gear 5, are made, for example, as an element of an air propeller of airplanes, helicopters or a propeller for propulsion of vessels. The module 4, which sets the law of movement of the central shaft 2, can be made as a cam mechanism, the profile of the cam defining the law of axial movement of the central shaft 2 with respect to the guide 1 or, for example, to be made in another variant as pneumatic or hydraulic cylinder, through which the axial movement of the central shaft 1 along the longitudinal axis of the Modified Planetary Gearbox is performed. In the axial movement of the central shaft 2 with respect to the guide 1, the intermediate wheel 5 engaged thereby rotates about its axis to the left or to the right, as a result of which they rotate about their axes to the left or to the right, respectively.

DRAWINGS AND DIAGRAMS

FIG. 1 - classic planetary gearbox.

FIG. 2 - general view of a modified planetary gearbox.

a / with a small propeller diameter.

b / with a large diameter of the propeller.

FIG. 3 - satellite modules.

a / satellite module made as a propeller shovel.

b / satellite module made as part of an air propeller.

EXAMPLES OF IMPLEMENTATION

The planetary gearbox and its structural elements can be made of metals, plastics or composite materials. The drive of the mechanism 4 defining the law of axial movement of the central shaft 2 can be combined with the mechanism for changing the angle of attack of an air propeller or a propeller, respectively.

Claims (12)

1. Planetary Gearbox, characterized by the removal of the element "crown", a structural part in a standard planetary gearbox. Planetary Gear according to Claim 1, characterized in that a guide element is formed in a cylindrical body closed on one side as in the closed bottom by a working hole with internal slots cut in it. Planetary Gearbox according to Claims 1 and 2, characterized by a central shaft along the length of which straight external slots are cut, in that part of which the shaft is in kinematic connection with the guide. Planetary Gear according to Claims 1, 2 and 3, characterized by a central shaft with helical teeth cut along its length in that part which is in kinematic connection with the intermediate gear. Planetary Gearbox according to Claims 1, 2, 3 and 4, characterized by a kinematic connection between the guide and the central shaft by means of a splined connection. Planetary Gear according to Claims 1, 2, 3, 4 and 5, characterized by the presence of an intermediate gear in kinematic connection with the central shaft and the satellite gears. Planetary Gear according to claims 1,2,3,4,5 and 6, characterized by the presence of satellite gears, modified as satellite working modules, freely rotating on axes mounted to the guide. Planetary Gear according to Claims 1, 2, 3, 4, 5, 6 and 7, characterized by a central shaft which has the ability to move axially (axially) along the longitudinal axis of rotation with respect to the guide. Planetary Gearbox according to claims 1,2,3,4,5,6,7 and 8, characterized by the presence of a mechanism determining the law of axial / axial / displacement of the central shaft along the longitudinal axis of rotation with respect to the driver. Planetary Reducer according to claims 1,2,3,4,5,6,7,8 and 9, characterized by simultaneous rotation of the kinematically connected guide and central shaft. Planetary Gearbox according to claims 1,2,3,4,5,6,7,8,9 and 10, characterized by satellite working modules rotating about their own axes under the influence of the central shaft during its axial movement with respect to on the guide. Planetary Reducer according to claims 1,2,3,4,5,6,7,8,9,10 and 11, characterized by safe, precise, simultaneous rotation of the satellite operating modules about their axes of rotation and their subsequent reliable fixing in a specific position.