SU943388A2

SU943388A2 - Screw-type motor

Info

Publication number: SU943388A2
Application number: SU762410787A
Authority: SU
Inventors: Самуил Соломонович Никомаров; Анатолий Михайлович Кочнев; Юрий Васильевич Захаров
Priority date: 1976-10-11
Filing date: 1976-10-11
Publication date: 1982-07-15

Description

(5«) ВИНТОВОЙ ДВИГАТЕЛЬ(5 ") SCREW MOTOR

Изобретение относитс к буровой технике, а именно к гидравлическим забойным двигател м.The invention relates to a drilling technique, namely to a hydraulic downhole motor.

По основному авт.св. W kOЦS известен винтовой двигатель, включающий корпус, статор с эластичной обкладкой и ротор, снабженный цилиндрическими катками l.According to the main auth. W kОЦS known screw motor, comprising a housing, a stator with an elastic lining and a rotor equipped with cylindrical rollers l.

Однако в этом винтовом двигателе задача гашени перекашивающего момента решена лишь частично, поскольку усилие, прижимакхцее верхний конец ротора к обкладке статора в зоне наиболее полного контакта их зубьев, воспринимаетс верхним катком, и усилие , отжимающее нижнюю часть ротора от обкладки статора в этой зоне, нижним катком восприн то быть не может. В результате перекос ротора полностью не устран етс и это снижает долговечность и перегрузочную способность двигател .However, in this screw engine, the skewing torque is only partially solved, since the force, pressing the upper end of the rotor to the stator plate in the zone of the fullest contact of their teeth, is perceived by the upper roller, and the force pressing the lower part of the rotor from the stator plate in this lower zone rink perceived can not be. As a result, the rotor skew is not completely eliminated and this reduces the durability and overload capacity of the engine.

Цель изобретени - повышение долговечности и нагрузочной способности двигател .The purpose of the invention is to increase the durability and load capacity of the engine.

Указанна цель достигаетс тем, что ротор снабжен маховиком, жестко св занным с его нижним концом.This goal is achieved in that the rotor is equipped with a flywheel rigidly connected to its lower end.

На чертеже изображен винтовой двигатель, продольный; разрез.The drawing shows a screw motor, longitudinal; incision.

Винтовой двигатель содержит кор10 пус t, в расточке которого установлен статен 2 с эластичной обкладкой, внутри обкладки статора эксцентрично размещен ротор 3 винтовые зубь которого взаимодействуют с зубь ми статора. По концам ротор снабжен цилиндрическими катками и 5, которые обкатываютс по внутренним цилиндрическим поверхност м корпуса, выполненным соосно по отношению The screw motor contains a core10 tus t, in the bore of which a statin 2 with an elastic lining is installed, inside the stator lining an eccentric rotor 3 is placed, the helical teeth of which interact with the stator teeth. At the ends, the rotor is provided with cylindrical rollers and 5, which run around the inner cylindrical surfaces of the housing, made coaxially with respect to

Claims

20 to the stator facing. A flywheel 6 is located in the lower part of the rotor. The transfer of the torque MOieHTa from the rotor 3 to the output shaft 7 of the engine is realized. is by means of a double-joint cardan shaft 8. When the engine is idling, when the differential pressure on the DR engine and the twisting moment Mpgp are minimal, and the centrifugal force from the portable movement of the rotor and flywheel has a maximum value, the rollers 4 and 5 transfer the radial load to the supporting surfaces made in the case. The magnitude of the skipping moment is determined by the relationship: Mn. P UrcM), ДРРсрТст пер 4-ir where Д Р- pressure drop in workers / bodies, kg / cm; - average rotor diameter, cm - stator helix pitch As the engine is loaded, the pressure drop and skew moment on the rotor increase, while the load on the roller increases and on the roller 5 decreases. The mass tn of the flywheel 6 and the shoulder of its center of mass relative to the upper roller are selected in such a way that, in the maximum power mode of the engine, which is the boundary of its steady-state operation, the centrifugal force on the flywheel creates a moment opposing the turning point and exceeding it in magnitude. This requirement is expressed by the following relationship: l, "ggguPDcpTcT fK .rot) where 0 and e are, respectively, of the scientific research institute's diameter and eccentricity of the rotor, cm; the number of teeth of the rotor; pitch of the stator helix, cm; the distance between the center of the flywheel and the upper roller, cm; accordingly, the MFC is the pressure drop (kg / cm) and the engine rotational speed (rpm) in the maximum power mode. Execution of the flywheel with mass according to the above expression provides compensation for the tipping point in the entire operating range of the engine operating modes - from idling to maximum power mode. The use of the invention allows to increase the durability of a downhole motor, as well as to increase its load capacity in the working area of the engine characteristics (from idle to maximum power mode) by eliminating rotor distortions from hydraulic forces. The invention of the screw engine auth.St. , it is also distinguished by the fact that, in order to increase the durability and load capacity of the engine, the rotor is equipped with a four-wheel drive, rigidly connected with its lower endon. Sources of information taken into account in the examination 1. USSR author's certificate tf OifjSSt to. E 21 B 3/12, 1972.