RU2741183C1 - Volume-action pump of planetary roller-vane circuit for abrasive media - Google Patents

Abstract

FIELD: aviation.

SUBSTANCE: invention relates to aircraft engineering and can be used in development or modernization of lubrication and cooling systems of transmission of rotors and other units for rotorcraft of any scheme, as well as in other industries. Pump of volumetric action of planetary roller-bladed circuit includes housing (6) with rotor (1) installed in it with separating rollers (2) with flange (3). On each roller (2) there is a synchroniser consisting of epicycle (4) and satellites (5). Rollers (2) are equipped with cavities. Housing (6) is equipped with separating blades. In housing (6) there is a cavity with holes connected to the pipeline supplying the working liquid; also the housing contains a cavity with holes for discharge of working liquid and a locking cavity.

EFFECT: invention is aimed at obtaining reliable pump design, which allows providing high abrasive resistance of the unit at maximum specific power without loss of efficiency.

5 cl, 3 dwg

Description

Technology area

The present invention relates to aeronautical engineering and can be used in the development or modernization of lubrication and cooling systems for the transmission of rotors and other units for rotary-wing aircraft of any configuration, as well as in other industries.

State of the art

Known design of a positive displacement pump of an axial-plunger circuit patent RU 2109167 C1 "Axial-piston variable pump". In the known device, the fluid is supplied with the reciprocating movement of the plungers under the influence of the oblique washer.

The disadvantage of this scheme is the presence in it of elements that perform a reciprocating motion (plungers), and the associated wear effects, which reduce the resource of both the pump itself and the units adjacent to it. Wear phenomena are significantly enhanced when suspended particles enter between the friction surfaces. In this case, the repetitive reciprocating movements will lead to an increase in the number of defects (for example, scratches) formed in this case and their total area.

Known design of the pump of the volumetric action of the roller-blade circuit according to the patent RU 2205273 C2 "Roller-blade machine". In the known device, the working fluid is supplied during the synchronous rotation of the rotor with the roller blades mounted on it by displacing the working fluid with the blades.

The disadvantage of this scheme is the possibility of abrasive particles getting into the micro-gaps between the rotating elements (rotor and rollers) and the pump body parts. That is, it is possible for these particles to be drawn into the gap, for example, between the rotor blade and the housing, and the corresponding damage to their surfaces.

The closest technical solution is the design adopted as a prototype and described in patent RU 2205273 C2.

Disclosure of invention

The objective of the present invention is to eliminate the noted drawback of known designs and to create a reliable pump design that allows, at maximum power density without loss of efficiency, to provide high abrasion resistance of the unit.

The technical result consists in increasing the reliability and resource of the pump, when operating in abrasive environments, increasing safety during operation, increasing the pumping and overall efficiency.

The specified technical result is achieved by the fact that in a positive displacement pump of a planetary roller-vane scheme containing a housing with a rotor (1) installed in it with separating rollers (2) with a flange (3) and separating vanes (12), according to the invention, on each roller ( 2), a synchronizer is installed, consisting of an epicycle (4) and satellites (5), while the rollers (2) are equipped with depressions (11), and the body (6) is equipped with dividing blades (12), while a cavity is made in the body (6) (A) with holes (9), connected to the pipeline supplying the working fluid, the housing (6) also contains a cavity (B) with holes (10) for draining the working fluid and a locking cavity (C).

The locking cavity (B) is enclosed by rollers (2).

The synchronization drive, represented by an epicycle (4) and satellites (5), is complemented by a sun wheel (7).

The body (6) is prefabricated.

The ribs (3) and the rotor (1) are made as a single unit.

Since the surfaces D and rollers 2 of the pump during operation experience rolling friction and not sliding, as in the designs of patent RU 2109167 C1 and patent RU 2205273 C2, when an abrasive particle enters, depending on the ratio of strength and hardness of its material and materials of the body and roller, either destruction of the particle or its pressing into the housing or roller will occur, which will lead to significantly less damage than its pulling through the gap between the housing and the blade in the design of patent RU 2205273 C2.

Brief Description of Drawings

FIG. 1 shows a longitudinal section of the pump;

FIG. 2 shows a cross section of the pump;

FIG. 3 shows a longitudinal section of a pump with a synchronization drive used as a gearbox.

Implementation of the invention

The pump is shown in FIG. 1 and FIG. 2 and contains a housing 6 with dividing blades 12 and with a rotor 1 installed in it. In this case, the housing 6 can be made whole or assembled.

The housing 6 contains a rotor 1 with separating rollers 2 installed on it with a flange 3 (protruding ridge). In this case, the flange 3 can represent a single whole with the rotor 1. Each roller 2 has an epicycle 4 (large central gear) and satellites 5 (gears).

The synchronizer, represented by epicycle 4 and satellites 5, can be supplemented with a sun wheel (central planetary gear wheel) 7, which will allow it to be used as an integrated gearbox and thereby increase the rotational speed of the drive shaft while maintaining the rotational speed of the rotor 1 and rollers 2.

A cavity A is made on the body 6, to which the pipeline for supplying the working fluid to the holes 9 fits.

Also on the body 6 there is a drain cavity of the working fluid B with holes 10, as well as a locking cavity C, which is bounded by rollers 2 and is designed to separate the pressure and drain cavities.

The rollers 2 are provided with depressions 11, which engage in the blades 12.

To counter the deformations of the case and internal contact loads arising during operation, compensating devices and elements of one design or another (not shown in the figures) can be used.

The pump works as follows:

The working fluid through the pressure pipeline (not shown in the figures) enters the cavities A, located symmetrically relative to the longitudinal axis of the shaft.

Under the influence of the torque on the rotor shaft 1, the working fluid is entrained by the side surfaces of the rollers 2.

The working fluid is displaced by the rollers in the cavity B with holes 10 until these rollers, with their depressions, fall on the blades 12 made on the body 6.

In this state, the blades of the housing 6 pass the rollers and, with further rotation of the rotor, separate cavities B and C, as well as A and B, from each other with their surface.

Cavity B is limited by rollers 2 and is locking, designed for reliable separation of pressure and drain cavities.

The working stroke of the rollers occurs only during the period of their movement along the surface D, and when the roller leaves this surface or when it opens, the next one comes into play. The angular extent of the surface D is selected in such a way that when the roller in contact with the surface D is opened, the adjacent roller will be closed. The minimization of the frictional forces arising between the contacting surfaces of the rotor 1 and the rollers 2 can be ensured by creating an oppositely directed force in one way or another.

The number of rollers 2, cavities A, B, C and surfaces D can be any, in accordance with design requirements. In the example presented, 2 cavities A, B, C are used.

Claims (5)

1. A positive displacement pump of a planetary roller-blade scheme, containing a housing (6) with a rotor (1) installed in it with separating rollers (2) with a flange (3) and separating vanes (12), characterized in that on each roller (2) a synchronizer is installed, consisting of an epicycle (4) and satellites (5), while the rollers (2) are equipped with depressions (11), and the body (6) is equipped with dividing blades (12), while in the body (6) a cavity (A ) with holes (9), connected to the pipeline supplying the working fluid, the body (6) also contains a cavity (B) with holes (10) for draining the working fluid and a locking cavity (C). 2. A pump according to claim 1, characterized in that the closing cavity (B) is enclosed by rollers (2). 3. The pump according to claim 1, characterized in that the synchronization drive, represented by the epicycle (4) and the satellites (5), is supplemented with a sun wheel (7). 4. The pump according to claim 1 or 2, characterized in that the housing (6) is made prefabricated. 5. A pump according to claim 1 or 2, or 3, or 4, characterized in that the flange (3) and the rotor (1) are made as a single unit.

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