SU724711A2

SU724711A2 - Percussive-action pneumo-hydraulic device

Info

Publication number: SU724711A2
Application number: SU782612086A
Authority: SU
Inventors: Дмитрий Никитович Ешуткин; Анатолий Яковлевич Чжен; Канат Кенжегалиевич Мендикенов; Абдуакас Абдуллович Каржаспаев; Алексей Павлович Рындин; Иван Николаевич Безмен
Original assignee: Карагандинский Ордена Трудового Красного Знамени Политехнический Институт
Priority date: 1978-05-04
Filing date: 1978-05-04
Publication date: 1980-03-30

Description

Изобретение относитс к ударным механизмам и может быть использовано в машинах ударного типа, примен емых в различных отрасл х народного хоз йства, например в горной промышленности или строительно-дорожной технике.The invention relates to impact mechanisms and can be used in impact type machines used in various industries of the national economy, for example, in the mining industry or road building machinery.

По основному авт. св. № 630411 известно гидропневматическое устройство ударного действи , содержащее корпус, шток, боек, орган управлени , состо ш,ий из распределительного золотника и золотника-пилота, рабочие камеры, напорные и сливные магистрали .According to the main author. St. No. 630411, a hydropneumatic percussion device is known, comprising a housing, a stem, a striker, a control, consisting of a distribution spool and pilot spool, working chambers, pressure and drain lines.

Недостатком этого устройства вл етс неустойчивость переключени распределительного золотника, обусловленна наличием замкнутого объема между распределительным золотником и крышкой корпуса. В процессе работы в этот объём поступает рабоча жидкость и ее давление повышаетс . При этом под действием жидкости на распределительный золотник со стороны замкнутого объема происходит преждевременное переключение органа управлени без реализации энергии бойка.A disadvantage of this device is the instability of switching the distribution spool due to the presence of a closed volume between the distribution spool and the housing cover. During operation, the working fluid enters this volume and its pressure rises. In this case, under the action of a fluid on the distribution valve from the side of a closed volume, a premature switching of the control organ occurs without the realization of energy of the striker.

Целью изобретени вл етс повышение устойчивости функционировани устройства ударного действи .The aim of the invention is to increase the stability of the functioning of the percussion device.

Дл этого в предлагаемом гидропневматическом устройстве ударного действи орган управлени дополнительно содержит подпружиненный плунжер, имеющий проточку на наружной поверхности, а в штокг устройства выполнена полость, в которойFor this, in the proposed hydropneumatic percussion device, the control body further comprises a spring-loaded plunger having a groove on the outer surface, and a cavity in which the

размешен указанный плунжер, дел щий ее на две чдсти, при этом верхн по отношению к бойку часть полости периодически сообщена с взвод щей полостью устройства .The specified plunger is placed, which divides it into two parts, while the upper part of the cavity relative to the striker is periodically communicated with the cocking device cavity.

На чертеже схематично изображено гидропневматическое устройство ударного действи .The drawing schematically shows a hydropneumatic percussion device.

Устройство содержит боек 1, имеющий возможность осевого возвратно-поступательного перемещени в корпусе 2 под действием энергии расшир юшегос газа пневмоаккумул тора 3 и энергии рабочей жидкости взвод щей полости 4. Устройство имеет орган управлени , состо щий из золотника-пилота 5, который подает сигнал на переключение распределительного золотника 6, и плунжера 7.The device contains a striker 1 having the possibility of axial reciprocating movement in the housing 2 under the action of the energy of the expanding gas of the pneumatic accumulator 3 and the energy of the working fluid of the charging cavity 4. The device has a control element consisting of a pilot pilot 5, which supplies a signal to switching distribution valve 6, and the plunger 7.

Золотник-пилот 5 подпружинен пружиной 8, а плунжер 7. - пружиной 9. Золотники 5The pilot spool 5 is spring-loaded spring 8, and the plunger 7. - spring 9. The spools 5

и 6 и плунжер 7 имеют возможность возвратно-поступательного перемещени . Пружины 8 и 9 предназначены дл возвращени золотника 5 и плунжера 7 в исходное положение.and 6 and plunger 7 are capable of reciprocating movement. The springs 8 and 9 are designed to return the spool 5 and the plunger 7 to its original position.

Claims

The device has an auxiliary chamber 10. An additional chamber 11, a controlled chamber 12 of the distribution spool 6 and a low pressure chamber 13. The striker 1 moves along the rod 14, in which a cavity 15 is made to accommodate the plunger 7. Plunger 7 divides this cavity into two parts 16 and 17 In this case, the upper part 17 of the cavity 15 is upper with respect to the striker 1 (with the working stroke of the striker 1) communicating with the charging cavity 4. The stem 14 is fixed in the housing 1. The device is closed by a lid 18. The device elements have channels 19-26 dl so communicating with the pressure line and to drain the working fluid - channels 27 and 28, respectively. The plunger 7 has a groove 29 on the outer surface, and the pilot spool 5 has a groove 30. The electro-pneumatic percussion device works as follows. The device is turned on by pressing striker 1 against the obstacle. The working fluid from the pump through the channel 27 enters the additional chamber I. Next, through the groove 30 of the pilot spool 5, channel 26, the groove 29 of the plunger 7 and channel 25, the working fluid enters the controlled chamber 12, and through the channels 21 of the distribution spool 6 - into the charging cavity 4. This is the charging of the striker 1. During this period, the distributor valve 6 is in the leftmost (according to the drawing) position, since the pressure in the additional chamber 11 and the controlled chamber 12 is the same, and the area of the distributor spool 6 is from pack Aulus emoy chamber 12 larger. The pilot spool 5 is in the leftmost (according to the drawing) initial position, and the plunger 7 is in the rightmost (according to the drawing) position under the action of the springs 8 and 9. At the end of the platoon, the firing pin 1 pushes the spool pilot 5, which cuts off the pressure channel 27 from the controlled chamber 12 and connects this chamber 12 to the auxiliary chamber 10 through the channel 20. The balance of forces acting on the distribution spool 6 is disrupted and under the action of the constant pressure of the working fluid in the additional chamber 11 moves to the extreme right (according to the drawing) floor coming to life In this case, the low alenia 13 chamber communicates with the erecting cavity 4 through channels 21 and 19. The distribution valve 6 cuts off the discharge line from the charging cavity 4 and communicates it with the auxiliary chamber 10. Under the action of the expanding gas of the pneumatic accumulator 3, the working stroke of the striker 1 The fluid entering the low pressure chamber 13 acts through the channel 24 on the end of the plunger 7, moving it to the far left position and holding it there. This ensures the stable functioning of the control body during the transition period (switching period of the striker 1 from platoon to the working stroke and to the initial period of the working stroke). The full stroke of the striker 1 occurs. At the end of the stroke, under the action of the restoring forces of the springs 8 and 9, pilot pilot 5 and plunger 7 return to their original positions, communicating the additional constant pressure chamber 11 with the controlled chamber 12. Thereafter, the control spool 6 returns in the original position. Then the cycle repeats. Claims of invention Hydropneumatic percussion device for aut. St. No. 630411, characterized in that, in order to increase the stability of the operation of the device, its governing body further comprises a spring-loaded plunger having a groove on the outer surface, and a cavity in which the plunger is placed dividing it into two parts is provided in the stem of the device; This upper part of the cavity with respect to the striker is periodically communicated with the cocking cavity of the device. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 630411, cl. E 21C 3/20, 07.04.77.

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