RU2015119320A

RU2015119320A - PISTON HYBRID MACHINE

Info

Publication number: RU2015119320A
Application number: RU2015119320A
Authority: RU
Inventors: Александр Павлович Болштянский; Виктор Евгеньевич Щерба; Алексей Юрьевич Кондюрин; Евгений Алексеевич Лысенко
Priority date: 2015-05-21
Filing date: 2015-05-21
Publication date: 2016-12-10
Also published as: RU2605492C2

Abstract

1. Поршневая гибридная машина, содержащая цилиндр и размещенный в нем с радиальным зазором поршень с образованием компрессорной и насосной полости, причем на цилиндрической поверхности поршня имеется, как минимум, одна канавка, выполненная в виде углубления в теле поршня и разделяющая его поверхность вдоль цилиндрической образующей на две части, отличающийся тем, что боковые поверхности канавки расположены под острым углом к оси поршня и цилиндра в направлении к компрессорной полости, причем объем канавки определяется выражением:где V объем канавки, D - диаметр поршня, δ - радиальный зазор между поршнем и цилиндром,- средний перепад давления на поршне в процессе сжатия-нагнетания газа, L - длина цилиндрической части поршня, заключенная между нижним выступом канавки и нижним торцом поршня, µ - динамическая вязкость жидкости, τ - время, за которое поршень перемещается из нижней мертвой точки в верхнюю мертвую точку и наоборот,- средняя скорость поршня, с которой он перемещается из нижней мертвой точки в верхнюю мертвую точку и наоборот.2. Поршневая гибридная машина по п. 1, отличающаяся тем, что канавка, разделяющая поверхность поршня вдоль его цилиндрической поверхности на две части, соединена с насосной полостью каналом с дросселем и обратным самодействующим клапаном, направленным в сторону канавки, причем диаметр дросселя d определяется уравнением:гдегде Q - объемный расход жидкости через радиальный зазор δ из насосной полости в канавку при ходе поршня из верхней мертвой точки в нижнюю мертвую точку, d - диаметр дросселя, ρ - плотность жидкости, α - коэффициент расхода жидкости через дроссель.1. A piston hybrid machine containing a cylinder and a piston placed therein with a radial clearance to form a compressor and pump cavity, and on the cylindrical surface of the piston there is at least one groove made in the form of a recess in the piston body and separating its surface along the cylindrical generatrix in two parts, characterized in that the side surfaces of the grooves are at an acute angle to the axis of the piston and cylinder in the direction of the compressor cavity, and the volume of the groove is determined by the expression: where V about groove volume, D is the piston diameter, δ is the radial clearance between the piston and cylinder, is the average pressure drop across the piston during gas compression-injection, L is the length of the cylindrical part of the piston enclosed between the lower protrusion of the groove and the lower end of the piston, μ is the dynamic fluid viscosity, τ is the time during which the piston moves from bottom dead center to top dead center and vice versa is the average speed of the piston with which it moves from bottom dead center to upper dead center and vice versa. 2. A piston hybrid machine according to claim 1, characterized in that the groove dividing the piston surface along its cylindrical surface into two parts is connected to the pump cavity by a channel with a throttle and a self-acting check valve directed towards the groove, and the throttle diameter d is determined by the equation: where Q is the volumetric flow rate of the fluid through the radial clearance δ from the pump cavity to the groove during the piston stroke from the top dead center to the bottom dead center, d is the diameter of the throttle, ρ is the density of the fluid, α is the flow rate of the fluid STI through the throttle.

Claims

1. A piston hybrid machine containing a cylinder and a piston placed therein with a radial clearance to form a compressor and pump cavity, and on the cylindrical surface of the piston there is at least one groove made in the form of a recess in the piston body and separating its surface along the cylindrical generatrix into two parts, characterized in that the side surfaces of the grooves are located at an acute angle to the axis of the piston and cylinder in the direction of the compressor cavity, the volume of the groove being determined by the expression:

where V is the volume of the groove, D is the diameter of the piston, δ is the radial clearance between the piston and the cylinder,

is the average pressure drop across the piston during gas compression-injection, L is the length of the cylindrical part of the piston enclosed between the lower protrusion of the groove and the lower end of the piston, μ is the dynamic viscosity of the fluid, τ is the time during which the piston moves from the bottom dead center to the top dead center and vice versa

- the average speed of the piston with which it moves from bottom dead center to top dead center and vice versa.

2. The piston hybrid machine according to claim 1, characterized in that the groove dividing the piston surface along its cylindrical surface into two parts is connected to the pump cavity by a channel with a throttle and a self-acting check valve directed towards the groove, and the throttle diameter d is determined by the equation :

Where

where Q is the volumetric flow rate of the fluid through the radial clearance δ from the pump cavity into the groove during the piston stroke from the top dead center to the bottom dead center, d is the diameter of the throttle, ρ is the density of the fluid, α is the coefficient of flow of the fluid through the throttle.