SU844815A1 - Diaphragm pump - Google Patents

Description

one

The invention relates to pump engineering, diaphragm pumps mainly for pumping blood and can be used in the artificial blood circulation system.

Known diaphragm pump containing at least one working chamber formed by a flexible tubular. About a diaphragm fixed at one end in the housing, the other on the central part of the piston, interacting with its end surface with the diaphragm and equipped with an axial check valve 15 and an electromagnetic actuator Til -

A disadvantage of the known pump is the relatively low efficiency due to 20 hydraulic losses due to the flow turbulization in the interaction of the piston face with the diaphragm, as well as the injury to the blood caused by the turbulization during pumping. 25

The aim of the invention is to increase the efficiency and reduce blood injuries.

For this, the end surface of the .piston interacting with the diaphragm is made conical.30

FIG. 1 shows the single-chamber proposed diaphragm pump; in fig. 2- two-chamber pump.

In the housing 1 of the pump, one or two working chambers 2 and 3 are formed, formed by flexible tubular diaphragms 4 and 5 having a spindle shape. 1c) hell diaphragm 4 (5) is fixed at one end in housing 1, and the other to the central part of piston 6, which interacts with its ends E113 surfaces 7 and 8 with diaphragms 4 and 5. Each end surfaces 7 (.8) are made conical specimen in the form of an exponent. Axis piston 6, as well as in case 1, check valves 9, 10 and 11 are installed. The pump is equipped with suction 12 and discharge 13 nozzles, moreover, nozzle 12 in a single-chamber pump is installed with relative displacement in the building. The 1st one is connected with portion 6. The piston 6 is mounted in the housing 1 on a spring

14 and is equipped with an electromagnetic drive, which is used as an induction-dynamic transducer with short-circuits

Claims (1)

15 and an excitation winding 16 enclosed by a magnetic actuator 17. Aperture 4 and 5 are made of a thin non-expanding film. When a high-quality voltage modulated by the heart rate is applied to the winding 16, an electromagnetic field is created which induces eddy currents in the short-circuited core 15. The interaction of a periodic electromagnetic field with eddy currents in the core 15 leads to reciprocating axial displacement of the latter together with the piston b mounted on the spring 14. The thrust 6 is affected by the end surfaces 7 and 8 with diaphragms 4 and 5 and the volume of the working chambers 2 and 3 is periodically changed. The pumped blood is supplied t under some overpressure created in the cardiopulmonary bypass system into chambers 2 and 3 at an increase in volume and displaced from them in patra side 13 through valve 11 with decreasing chambers 2 and 3. Conical shape of end surfaces, 7 and 8 pistons with the exponential generatrix, when the diaphragms 4 and 5 interact with the pores of it 6, a gradual change in the rate of inlet and outlet of the blood from valve 10 and, thus, irrotational flow of blood with minimal hydraulic resistance and a small degree of injury. Formula of the Invention The diaphragm pump is primarily for pumping blood containing at least one working chamber formed by a flexible tubular diaphragm fixed at one end in the housing and the other on the central part of the piston interacting with its end surface with the diaphragm and equipped with an axial check valve and An electromagnetic actuator, characterized in that, in order to increase efficiency and reduce blood injuries, the end surface of the piston interacting with the diaphragm is made conical. Sources of information taken into account during the examination 1. Accepted for Japan No. 48-31564, cl. 63 (3) C 41, publ. 1973. P  f7, y /at / 7 / J