SU816458A1

SU816458A1 - Triggering mechanism of thermal converter for artificial heart

Info

Publication number: SU816458A1
Application number: SU792756679A
Authority: SU
Inventors: Валерий Иванович Шумаков; Игорь Владимирович Ширко; Михаил Иванович Дмитрук; Борис Алексеевич Брехов
Original assignee: Научно-Исследовательский Институттранспланталогии И Искусственных Op-Ганов; Московский Физико-Технический Институт
Priority date: 1979-04-23
Filing date: 1979-04-23
Publication date: 1981-03-30

Description

Изобретение относится к медицинской технике, касается тепловых кон-ι вертеров и может найти применение в медицине в.системе искусственного кровообращения.The invention relates to medical equipment, relates to thermal converters and may find application in medicine in the system of cardiopulmonary bypass.

Известно спусковое устройство теплового конвертера для искусственного сердца, содержащее запорный механизм, взаимодействующий с подпружиненным рабочим штоком конвертера, снабженного установленной в корпусе с возможностью перемещения контрольной тягой, и управляемый по положению передаточного сильфона насоса крови [1] .Known trigger device for a thermal converter for an artificial heart, containing a locking mechanism that interacts with a spring-loaded operating rod of the converter, equipped with a control rod mounted for movement in the housing, and controlled by the position of the transmission bellows of the blood pump [1].

Недостатком известного спускового устройства является относительная сложность конструкции из-за наличия большого числа рычажных звеньев, шарниров и направляющих.A disadvantage of the known trigger device is the relative complexity of the design due to the presence of a large number of linkages, hinges and guides.

Цель изобретения — упрощение конструкции устройства.The purpose of the invention is to simplify the design of the device.

Цель достигается тем, что в устройстве запорный механизм выполнен в виде неподвижной относительно корпу-* са конвертора втулки с рядом радиальных отверстий, в которых расположены шарики, и установленной на ней с возможностью относительного перемещения подвижной втулки, имеющей внутреннюю 30 '816458 ной работы шток 3 снова движется влево и цикл повторяется.The goal is achieved by the fact that in the device the locking mechanism is made in the form of a sleeve fixed relative to the converter housing * with a series of radial holes in which the balls are located and mounted on it with the possibility of relative movement of the movable sleeve having an internal rod 30 '816458 moves left again and the cycle repeats.

Замена рычажной системы в известном спусковом устройстве двумя простыми по конфигурации втулками с шарикас ми и пружиной позволяет упростить конструкцию спускового устройства.Replacing the lever system in the known trigger device with two simple configuration bushings with balls and a spring makes it possible to simplify the design of the trigger device.

'3 снабжен наружной кольцевой канавкой 10 под шарики 6 и упором 11 для взаимодействия с контрольной тягой 2, а передаточный сильфон 12 насоса крови — соосной штоку 3 упорной втулкой 13, имеющей опорную площадку 14 для взаимодействия с рабочим штоком и опорный торец 15 для взаимодействия с подвижной втулкой 7, Подвижная втулка 7 поджата к упору 9 пружиной 16.'3 is provided with an outer annular groove 10 for balls 6 and a stop 11 for interacting with the control rod 2, and the transmission bellows 12 of the blood pump - for the coaxial rod 3 with a thrust sleeve 13 having a support pad 14 for interacting with the working rod and a supporting end 15 for interacting with the movable sleeve 7, the movable sleeve 7 is pressed against the stop 9 by the spring 16.

После совершения рабочего хода вправо рабочий шток 3 движется влево, при этом он вначале упором 11 воздействует на контрольную тягу 2 и перебрасывает ее в левое положение. При дальнейшем движении рабочего штока 3 канавки 10 под шарики 6 на нем совпадает с отверстиями 5 под шарики 6 в неподвижной втулке 4, после чего под воздействием пружины 16 и подвижной втулки 7 точку на получает до упора шток 3 зафиксирован от перемещения вдоль оси вправо, хотя сила пара в конвертере стремится дать ему ход в этом направлении.After completing the working stroke to the right, the working rod 3 moves to the left, while at first it focuses on the control rod 2 with an emphasis 11 and throws it to the left position. With the further movement of the working rod 3 of the grooves 10 under the balls 6 on it coincides with the holes 5 for the balls 6 in the fixed sleeve 4, after which, under the influence of the spring 16 and the movable sleeve 7, the point 3 gets to the stop the rod 3 is fixed from moving along the axis to the right, although the steam power in the converter tends to give it a move in this direction.

Claims

The invention relates to medical technology, relates to heat treatment of werters, and can be used in medicine in the artificial blood circulation system. A thermal converter descender for an artificial heart is known, which contains a locking mechanism that interacts with a spring-loaded working converter shaft equipped with a control rod mounted in the housing for movement and controlled by the position of the transfer bellows of the blood pump SP. A disadvantage of the known trigger device is the relative complexity of the design due to the presence of a large number of link links, hinges and guides. The purpose of the invention is to simplify the design of the device. The goal is achieved by the fact that in the device the locking mechanism is made in the form of a sleeve stationary relative to the housing with a series of radial holes in which the balls are located, and mounted on it with the possibility of relative movement of the movable sleeve, and the internal annular passage under the balls, and spring-loaded the side of the stop made on the fixed sleeve, and the working stem is provided with an outer annular groove under the balls and an emphasis for interaction with the control rod, and the transfer gear of the sylphs is coaxial a rod with a stop sleeve having a support pad for engaging with the working rod and a bearing end for engaging with a movable sleeve. FIG. 1 shows the trigger in the locked state; Fig 2, in the position after actuation. The heat converter (not shown in the drawing) has a controllable pull 2 installed in the housing 1, as well as a working rod 3 equipped with a locking mechanism designed as a sleeve 4 fixed relative to the housing 1 with a series of bores 5, in which the balls 6 are located and the movable sleeve 7 is mounted on it with the possibility of relative movement, the inner ring groove 8 has an inner groove 8 under the balls 6 and is spring loaded in the direction of the stop 9 which is made on the non-removable sleeve 9. The working rod 3 is provided with an outer an annular groove 10 under the balls 6 and an emphasis 11 for engagement with the control rod 2, and the transfer bellows 12 of the blood pump 12 is a thrust sleeve 13 coaxially with the rod 3, having a bearing pad 14 for interacting with the working rod and a supporting end 15 for interacting with the movable sleeve 7, the sliding 7 is compressed to the stop 9 by the spring 16. After the working stroke is made to the right, the working rod -3 moves to the left, at the same time it first by the stop 11 acts on the control rod 2 and moves it to the left position. In the further movement of the working stem 3, the grooves 10 for the balls 6 on it coincide with the holes 5 for the balls 6 in the fixed sleeve 4, then under the influence of the spring 16 and the movable sleeve 7, the balls 6 are pressed into the groove on the working rod 3 and the sleeve 7 gets the opportunity to move to the right until it stops 9. In this position, the working rod 3 is fixed from moving along the axis to the right, although the force of the steam in the converter tends to give it a stroke in this direction. Under pressure from the blood entering the pump (not shown), the stop sleeve 13 moves to the left. At the end of this movement, the bearing pad 14 of the sleeve 13 comes into contact. with the movable sleeve 7 and moves it to the left position, in which the groove 8 under the balls 6 in it coincides with the holes 5 in the fixed sleeve 4. Under the influence of the working rod 3, which is ready to make a working stroke, the balls 6 are pressed into the groove in the sleeve 7 and the working rod 3 gets the opportunity to start moving to the right by acting on the supporting end 15 of the stop sleeve 13, while compressing the transfer bellows 12 and relocating the control rod 2 to the right, completing the field of operation of the rod 3 again moving left and the cycle repeats. Replacing the lever system in the known release device with two simple configurations with bushings with a ball and a spring allows to simplify the design of the release device. Claims of the invention A descender device for a heat converter for an artificial heart, which contains a locking mechanism, interacts with a spring-loaded working converter shaft, fitted with a control rod mounted in the housing for movement and controlled by the position of the transfer bellows of the blood pump, characterized in that, in order to simplify construction, locking mechanism rypolnen in the form of a sleeve stationary relative to the housing of the converter with a series of diagonal holes in which the balls are located, and mouth a movable sleeve with an inner annular groove under the balls and a spring-loaded stop mounted on the fixed sleeve, the working rod is provided with an outer annular groove under the balls and an emphasis for interaction with the control rod, and the transfer bellows - coaxially rod a thrust bushing having a bearing pad for interacting with the working stem and a supporting end for interacting with the MOBILE bushing. Sources of information taken into account during ex ertize 1. Final Report April 1971, through November 1971 prepared by Westing house Aatronuclear laboratory, WANL-3043, National Technical Information Serwise, Spring field, verginia, 2215.

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