SU969962A1 - Electromagnetic pump - Google Patents

Description

The invention relates to pump engineering, relates to volumetric electromagnetic pumps, and can be used in various industries of the national economy for pumping fluids.

Known electromagnetic pump containing covered by the coils of the solenoids and placed in the housing of the piston, between each end of which. and the end walls of the housing form working cavities, and a control unit connected to the solenoid coils, which has magnetically controlled piston position sensors flj.

A disadvantage of the known pump is the complexity of the structures due to the presence of a system of magnetic action on the sensors in the extreme positions of the piston. In addition, it is possible that the magnetic field on the sensors, which can lead to a malfunction in their work. This reduces the reliability of us.

The purpose of the invention is to simplify the design and increase reliability.

To achieve this goal, the end walls of the housing are provided with cups protruding into the working cavities, the magnetic piston position sensors are placed in these cups, and at the ends of the piston there are recesses coaxial with the cups, equipped with a magnetic shielding coating

10 wherein the depth and cross section of the grooves are larger, respectively, the length and cross section of the glasses.

FIG. 1 shows a pump, a longitudinal section in FIG. 2, a section A-A

15 in FIG. one.

Claims (1)

The electromagnetic pump contains piston jg 3 enclosed in solenoid coils 1 and placed in housing 2. Working cavities 6 are formed between each end C of piston 3 and end walls 5 of housing 2. A control unit (not shown) with magnetically controlled sensors 7 is connected to solenoid coils 1 Positions of the piston 3 o The sensors 7 are made in the form of magneto-controlled hermetic contacts 8 connected in the circuit of the solenoids 1. The end walls 5 of the housing 2 are equipped with cups 9 projecting into the working cavities 9. Magnetic-controlled sensors 7 The sleeves 3 are placed in these cups 9, and at the ends k of the piston 3, the grooves 1Q are made coaxial to the cups 9 and are equipped with a magnetically shielded coating 11. The depth and cross section of the grooves 10 are larger, respectively, than the length and cross section of the cups 9. pressure valves 12 and 13, respectively. Under the action of the electromagnetic field generated by the solenoid coils 1, the piston 3 performs reciprocating movements, in which there is a periodic change in the volume of the working cavities 6, the pumped medium is sucked through the suction valves 12 and is forced to the consumer through the discharge solenoid coils 13c 1 are kept in the switched on state by magnetically controlled hermetic contacts 8 located in the zone of action of the magnetic field of the corresponding solenoid 1 o. The sealed contact 8 is kept in the on state by the magnetic field of this solenoid. When the piston 3 is moved to each side at the end of its stroke, the corresponding notch 10 closes the cup 9 and the magnetic shielding coating interrupts the magnetic flux to the sensor 7. The contact 8 opens and de-energizes the coil of the solenoid 1 located in the same side of housing 2. Simultaneously, the control unit supplies power to the opposite solenoid 1, the magnetic field of which closes the corresponding magnetic-controlled contact 8 "This contact 8 b locks the control unit and keeps the coil of the solenoid 1 in the on state until the end of the reverse of the piston 3 when the notch 10 in the end C of the latter closes the cup 9 with the sensor 7. The energized coil of the solenoid 1 de-energizes and the opposite solenoid 1 turns on. Then the cycle repeats. Due to the fact that the magnetically controlled contacts 8 are held in a closed state by the magnetic field of the same solenoid 1, in whose circuit the contact 8 is connected, the design of the pump is simplified. In this case, the actuation of the contacts 8 occurs due to interruption of the magnetic flux of the coil of the solenoid 1 and therefore pickups of external magnetic fields do not interfere with the pump, which increases its reliability. - Invention Formula Electromagnetic pump containing a piston enclosed by solenoids and a piston housed in the housing, between each end of which and the end walls of the housing are working cavities and a control unit connected to the solenoids solenoids having a Magnetically controlled piston position sensors, characterized in that simplifying the design and improving reliability; the end walls of the housing are equipped with cups protruding into the working cavities; magnetic sensors of the piston position are placed in these cups x, a piston carried at the ends of coaxial recesses glasses provided with magnitoekraniruyuschim coated, with the depth and cross-section of the recesses is greater, respectively length and cross-sectional cup. Sources of information taken into account during the examination 1. USSR Author's Certificate No., cl. F O B 35/0, 1971. // // 1Z 9 // fig ff