SU910998A1 - Radial bearing of hole-bottom engine - Google Patents

Description

(5) RADIAL SUPPORT OF BOTTOM ENGINE

; ,one.

The invention relates to hydraulic downhole motors, namely to radial bearings of downhole motors.

A known radial bearing of a turbo-drill with interchangeable elastic elements in the form of rings mounted in a detachable support body.

The known support is held against displacement in the axial and radial directions by frictional forces that occur between the ends of the parts during axial compression of the entire system in the housing. In the event that the body parts system is not compressed in the downhole motor (-, 5 is an example of a turbo-drill with floating stators), such supports are not possible.

Also known is a radial bearing jg of a downhole motor, comprising a bearing element with a metal frame and flushing channels on the inner surface and clamps for

interaction with the keyway. engine housing 2.

However, when installing such a support in a cylindrical body, it is necessary to create an axial force to prevent rotation, i.e. This method of fastening the support causes the complexity of its design and increases rigidity in the axial direction.

The purpose of the invention is to simplify the design and ensure the reliability of the support without fixing it in the engine block with axial forces.

Claims (2)

The goal is achieved by the fact that the frame of the elastic element is made in the form of a ring, the latches are in the form of ribs, the elastic element has protrusions on the outer surface in which the ribs are located, with the outer diameter of the elastic element along the protrusions larger than the inner diameter of the engine body, and from the edge to the ring does not exceed the half-difference between the outer diameter 391 of the elastic element along the protrusions and the inner diameter of the engine body. The drawing shows schematically a pre-assembled support. Radial. consists of an elastic element with a metal frame in the form of a ring 1. On the inner surface of the elastic element 2 are located flushing channels 3 for the passage of lubricating fluid. On the outer surface of the elastic element 2, protrusions k are located, which form between the element 2 and the body (; Not shown) of the motor channels for passage of flushing fluid, with the outer diameter of the elastic element 2 along the projections A larger than the internal diameter of the body . To increase the rigidity of the support, in order to more reliably fix it in the housing in the projections C in the radial direction, clamps in the form of metal ribs 5 are installed, which interact with the keyway on the internal surface of the engine. The ribs 5 are installed so that between the edge and the outer surface of the metal ring 1 there is a gap filled with an elastic material, the magnitude of which is greater than the radial deformation of the protrusions 4 arising when the support is installed in the housing. The tension with which the support is installed in the KOp start is ensured by the action of the elastic forces of the elastic material located between the edge 5 and the outer surface of the metal ring 1. During operation (under the action of the powerful transverse oscillations of the shaft), the support is turned in the engine casing until one of the protrusions k will not oppose the keyway. At this moment, under the action of the elastic forces of the elastic material, the protrusion will fall into the keyway and fix the support from further turning. The proposed constructive solution allows to increase the reliability of the support in operation, when it is exposed to significant dynamic loads in the environment of abrasive fluid. Claims Radial support of a downhole motor, comprising an elastic element with a metal frame and flushing channels on the inner surface and clamps for engaging with the keyway groove of the motor housing, characterized in that, in order to simplify the design and ensure the reliability of the bearing without fixing it in the motor housing axial forces, the frame of the elastic element is made in the form of a ring, the retainers are in the form of ribs, the elastic element has protrusions on the outer surface, in which the ribs are placed and, the outer diameter of the elastic element along the protrusions is larger than the inner diameter of the engine body, and the distance from the rib to the ring is half the difference between the outer diameter of the elastic element along the protrusions and the inner diameter of the engine body. Sources of information taken into account in the examination 1. The author's certificate of the USSR And 156502, cl. E 21 3/12., I960. 2. Authors certificate of the USSR N 237067, cl. Е 21 В 3/12, 19б5 (prototype).