RU2005208C1 - Double-acting piston solenoid pump - Google Patents

Abstract

Use: for pumping liquids and gases. SUMMARY OF THE INVENTION: On a pipe of non-magnetic non-conductive material, drive coils are mounted in a housing that is a magnetic shield. The piston is made of ferromagnetic material and mounted inside the pipe on the rolling bearings. In the case of the pipe being made and the piston coated with plastic on the surfaces adjacent to the rolling bearings, inserts of wear-resistant material 2i are made

Description

The invention relates to devices for pumping liquids and gases and can be used in various fields of national economy, including irrigation of garden plots.

A centrifugal submersible single-phase household pump with a BTsP-0.4-25 condenser motor with a power of 400 W, a voltage of 220 V, a capacitor capacity of 16 microfarads, a pressure of 25 m, and a capacity of 1.44 m3 / h is known.

In this and similar pumps, at an alternating current frequency of 50 Hz, the magnetic field rotates at 3,000 rpm (synchronous speed), which is reflected in the durability of the bearings, which must be replaced periodically, which is rather difficult under conditions of domestic shortage and high cost.

Known diaphragm vibration pumps with an elastic elastic diaphragm with a ferromagnetic core, periodically attracted by an alternating current electromagnet, for example, a BV-0.16-25 Geyser electric pump with a power of 170 ... 215 W, a voltage of 220 V, a consumed current of 3.5 A, a pressure of 25 M, with a productivity of 0.576 m3 / h; electric pump BV-02-40 Rodnichok-2, 300 W power, 220 V voltage, 4.0 L current consumption, 40 m head, 0.72 m3 / h capacity.

In these pumps, at a time when the current about the winding of the electromagnet is close to zero, the force of attraction of the core is also close to zero, and due to the elasticity of the diaphragm or spring, the core returns to its original state. To increase efficiency, these and similar devices operate near mechanical resonance. With a large number of cycles, at an alternating current frequency of 50 Hz, the core of the electromagnet is attracted 100 times per second, 6000 times per minute, 360,000 times per hour, which leads to the destruction of the elastic diaphragm or spring, which is a disadvantage of these devices. In addition, elastic elastic diaphragms made of rubber-like material age during storage, change their elasticity, resilience, and become cracked.

A reciprocating compressor of a rather complicated design with an electrodynamic drive is known, in which the permanent magnet is in place and the movable AC winding is connected to the piston and the rod. Alternating current is supplied to the movable winding by flexible conductors. An electrodynamic drive is used in this design. The reciprocating coil is connected to the piston and the rod and moves with them as a result of the interaction of the alternating magnetic field of the coil

with a magnetic field of a permanent magnet. Such a device is limited in power, in addition, the flexible current lead to the moving coil is subjected to a millionth cycle of bends during operation per day, which reduces the reliability of the device.

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

In FIG. 1 is a diagram of the proposed

5 pumps.

In the housing 1, which is also a magnetic screen, stationary coils (windings) 2 are placed, which are on a pipe 3 made of a non-conductive non-magnetic material. In the case of using plastic for the manufacture of the pipe and coating the ferromagnetic piston core, the guide inserts 4 are made of wear-resistant

5 of material into the plastic of the pipe and the piston coating, so that the rolling bearings move along the guide inserts 4. In the pipe 3 there are rolling bearings 5 (balls or rollers), separated from each other by a separator 6, which is connected neither to the pipe nor to piston-core 7. A piston-core 7 made of ferromagnetic material is supported on the rolling bearings 5 through the guide inserts 4. For an electromagnetically driven actuator, the piston-core is made of a magnet of soft material (tape, plates, wire); for an electrodynamic actuator, the piston-core is made of pre-magnetized magnetically hard material. Cuffs 8 are fixed at the ends of the piston core 7 to seal the gap between the piston and the pipe. At the ends of the pipe, suction 9 and pressure 10 valves are fixed.

5

Fig. 2 is a circuit diagram for connecting two coils to a single-phase AC mains voltage.

Each coil is connected in series with the semiconductor device 11 (a diode for an AC pump, a triode or a thyristor for a DC pump). To reduce the current consumption and increase the power factor 5, a capacitor 12 is turned on. When the pump is powered from a constant current source, coils 2 are connected in series with a thyristor or transistor, which are controlled from the control unit.

The pump operates as follows.

Assume that the piston is in the leftmost position and the coil is current flowing around the right, then the piston moves from the leftmost position to the rightmost one, doing the work of moving the liquid or gas. A vacuum forms behind the piston, and pressure increases in front of the piston. In this case, the suction 9 and discharge 10 valves open and the medium is pumped. At the next instant of time, the left coil flows around the current, while the right does not flow around the current and the piston moves from the rightmost position to the left one. Further process

Claims (1)

The claims DOUBLE-ACTION PISTON SOLENOID PUMP containing a pipe of non-magnetic non-conductive material, on which drive coils are mounted, enclosed in a casing - a magnetic screen, a piston from repeated. With any movement of the piston medium is pumping. Flexible material cuffs 8 seal the gap between the piston and the pipe, reducing leakage. The rolling bearings 5 reduce friction when moving the piston inside the pipe and increase the efficiency of the pump. By making a periodic reciprocating motion, the core piston moves the liquid or gas. (56) Copyright certificate of the USSR No. 1290011. cl. F 04 B 35/04, 1985. ferromagnetic material on rolling bearings fixed in the separator, and a valve system, characterized in that, with In order to increase reliability and durability, in the case of making a pipe and covering the piston from plastic, inserts made of wear-resistant material are made on surfaces adjacent to the rolling bearings. -ff 7 g FIG. Z