SU995893A1

SU995893A1 - Pneumatic vibration exciter

Info

Publication number: SU995893A1
Application number: SU813327853A
Authority: SU
Inventors: Мартин Емельянович Ершов; Эдуард Ольгердович Веретынский; Юрий Александрович Петренко
Original assignee: Николаевский Филиал Одесского Инженерно-Строительного Института
Priority date: 1981-07-06
Filing date: 1981-07-06
Publication date: 1983-02-15

Description

(54) ПНЕВМАТИЧЕСКИЙ ВИБРОВОЗБУДИТЕЛЬ(54) PNEUMATIC VIBRATOR

1one

Изобретение относитс к устройствам дл возбуждени колебаний, используемым в промышленности строительных материалов , а также в других отрасл х народного хоз йства.The invention relates to oscillation devices used in the building materials industry, as well as in other branches of the national economy.

Известен пневматический вибровозбудитель , содержащий две шайбы, соединенные винтом. Б уступы которых помещены кольца радиального шарикового подшипника , образующие беговую дорожку дл шарика. Через штуцер внутрь беговой дорожки подаетс сжатый воздух 1.Known pneumatic vibration exciter containing two washers connected by a screw. B ledges which are placed rings radial ball bearing, forming a treadmill for the ball. Through the fitting, compressed air 1 is supplied to the inside of the treadmill.

Однако известный вибровозбудитель не обеспечивает получени двухчастотных колебаний.However, the known vibration exciter does not provide for obtaining two-frequency oscillations.

Наиболее близким к изобретению по технической сущности и достигаемому эффекту вл етс пневматический вибровозбудитель , содержащий корпус с кольцевой полостью, размешенный в ней дебаланс и штуцер, закрепленный с наружной стороны корпуса. Штуцер представл ет собой цилиндрический патрубок 2.Closest to the invention in technical essence and the achieved effect is a pneumatic vibration exciter, comprising a housing with an annular cavity, an imbalance mixed in it and a fitting secured on the outside of the housing. The fitting is a cylindrical nozzle 2.

В этом вибровозбудителе скорость и энерги воздуха, вход щего в кольцевую, полость через штуцер, незначительны.In this exciter, the speed and energy of the air entering the annular cavity through the nozzle are insignificant.

Цель изобретени - увеличение удельной мощности устройства.The purpose of the invention is to increase the power density of the device.

Поставленна цель достигаетс тем, что в пневматическом вибровозбудителе, содержащем корпус с кольцевой полостью, раз мещенный в ней дебаланс и штуцер,. закрепленный с наружной стороны корпуса, штуйер выполнен в виде сопла Лавал , ось которого размещена по касательной к оси кольцевой полости и рассто ние отThe goal is achieved by the fact that in a pneumatic vibration exciter, comprising a housing with an annular cavity, debalance located in it and a choke ,. mounted on the outside of the housing, the plunger is made in the form of a Lawal nozzle, the axis of which is placed tangentially to the axis of the annular cavity and the distance from

О оси последней до среза сопла равно 4,7 диаметра критического сечени сопла.About the axis of the latter to the nozzle section is equal to 4.7 of the diameter of the critical section of the nozzle.

На чертеже представлена схема вибровозбудител .The drawing shows a diagram of the vibration exciter.

Пневматический вибровозбудитель со„ держит корпус 1, который вместе с крыщкой 2 образует кольцевую полость 3 с квадратным радиальным сечением. Цилиндрический дебаланс 4, установленный в кольцевой полости 3, имеет в теле отверстие 5, смещенное эксцентрично относительно соб20 ственной оси вращени .Pneumatic vibration exciter with „holds the housing 1, which together with the lid 2 forms an annular cavity 3 with a square radial section. The cylindrical unbalance 4, installed in the annular cavity 3, has an orifice 5 in the body, which is eccentrically shifted relative to its own axis of rotation.

Claims

For supplying compressed air into the annular cavity 3, the housing is provided with a fitting 6, which is a Lavap nozzle, oriented so that the distance from the nozzle section to the axis of the annular cavity 3 along the directions; The discharge of air is 4.7 times the diameter of the nozzle throat. In the cover 2 there are holes 7 for exhausting air. Pneumatic vibration exciter works as follows. Compressed air through the nozzle 6 enters the cavity 3 and reports the movement to the unbalance 4 to the openings 7. Next, the unbalance 4 moves under the action of the inertia acquired by it. In cavity 3, unbalance 4 moves along a circular (elliptical) trajectory, which leads to the emergence of centrifugal force, which imparts oscillation to body 1 with a frequency equal to the number of unbalance revolutions 4 c. cavities 3. At the same time, unbalance 4 makes the ramp around its own axis, and since it is made in the form of a cylinder unbalanced by hole 5, an additional centrifugal force arises, changing with a frequency equal to the number of unbalance revolutions communicates to housing 1 additional vibrations at a higher frequency. The invention increases the power density of the device by 16%. Pneumatic vibration exciter, comprising a housing with an annular cavity, debalance located therein and a fitting secured on the outer side of the housing, characterized in that in order to increase the specific power of the vibration exciter, the nozzle is arranged tangentially to the axis the annular cavity, and the distance from the axis of the latter to the nozzle cut is 4.7 times the diameter of the nozzle throat. Sources of information taken into account during the examination 1. USSR author's certificate No. 381417, cl. B 06 B 1/18, 1971.

2. USSR author's certificate number 349417, cl. B 06 B 1/18, 1970 (prototype.