SU1716487A1 - Electromagnetic flow governor - Google Patents

Abstract

The invention relates to automatic pneumatic hydraulic systems and can be used to control the flow of liquid or gas in various industries. The purpose of the invention is to improve the accuracy of the electromagnetic flow regulator. The electromagnetic flow regulator includes a housing 1- with an output channel 2, an inlet channel 5, a regulating member comprising a hollow core 3 with a sleeve 4 and plates of equal thickness, mounted in the packages, mounted on the sleeve in which a longitudinal groove 6 is made, in each The plate, located in the zone of the longitudinal groove, has a narrow slit extending from the center to the periphery, and these plates are oriented in such a way that the slits do not coincide with each other. 3 Il. (Ls

Description

The invention relates to automatic pneumatic hydraulic systems and can be used to control the flow of liquid or gas in various industries.

A known electromagnetic flow regulator with a regulating member is moved by the magnetic field of the coil, in the case of which a rod is fixedly mounted to the coaxial magnetic coil, and the regulator is placed between the coil and the rod and is made of a ferromagnet; ногоP. :

The main disadvantages of the flow regulator are the narrow range and low control accuracy as well as the possibility of environmental pollution.

inside the particle regulator, resulting from the deformation of the spring.

The closest in technical essence and the achieved result JK proposed is a solenoid valve, comprising a housing with inlet and outlet channels, in which the electromagnet windings and a hollow core with a longitudinal slot 2 are placed.

The disadvantage of this solenoid valve for proportional flow control is the low accuracy of flow control due to the non-linear dependence of the flow rate of the working medium on the displacement of the regulator. The disadvantage is due to the fact that the expiration of the working environment

4 00

it is guided through a hole or groove with t a variable passage area. This causes changes in the outflow of gas or liquid, since the flow rate and other parameters change, which ultimately does not allow for high control accuracy. The aim of the invention is to improve the accuracy of the electromagnetic flow regulator.

The goal is achieved due to the fact that in an electromagnetic flow regulator comprising a housing with inlet and outlet channels, in which an electromagnet winding and a hollow core with a longitudinal slit are placed, this hollow core is made in the form of a sleeve, the open end of which is connected to the inlet channel, and plates of equal thickness, tightly folded into the bag, are mounted on the sleeve, the plates located in the zone of the longitudinal slit are provided with slots that communicate with the longitudinal slit, while the slits of the adjacent plates are offset one relative to another sleeve installed in the housing with the possibility of axial movement and communication of the slots with the output channel, and the electromagnet winding is made in the form of at least three coils.

The novelty of the claimed invention is due to the fact that the hollow core contains a sleeve in which a longitudinal slit is made and forcibly stretched packages of plates of equal thickness, mounted on the sleeve, and in each plate located in the zone of the longitudinal slit, narrow a slot extending from the center to the periphery, and the plates are oriented in such a way that the slots do not coincide with each other.

A hollow core containing a liner and forcibly removed packs of plates of equal thickness, mounted on the liner, is used to increase the speed of the engine by charging (a well-known feature) and for discrete control of the working medium microdistors.

Only a set of distinctive features is necessary and sufficient to achieve this goal.

Only the execution of plate packs (ferromagnetic and non-ferromagnetic)

from plates of equal thickness with the same rips, allows for discrete flow control during reciprocating movement of the hollow core. A sleeve with a longitudinal slit is a straightening plate, intended for their orientation and, thanks to its implementation, it is possible to feed the working medium into the cavity of the slits of the plates.

In each plate, located in the zone of the longitudinal slit, there is a narrow slit extending from its center to the periphery. It is necessary in order to obtain small equal areas of the cross-section of the capillaries, through each of which will pass the same (equal) gas or liquid flows with equal flow characteristics. This is due to the fact that the slits of the plates do not coincide with each other.

The presence in the hollow core of the liner and forcibly removed packages of plates of equal thickness, mounted on the sheath in which the longitudinal slot is made, and in each plate located in the zone of the longitudinal groove, a narrow slot is made, and the plates are oriented coincide with each other, allowing the implementation of the invention to improve the accuracy of the electromagnetic flow regulator.

This is due to the fact that alternately turning on the coils leads to a discrete displacement of the hollow core along the axis of the housing and the windings of the electromagnet. At the same time, the flow rate is equal to the sum of the micro expenditures of the medium passing through the slots (capillary plates of the hollow core (rotor)), which are located below the seal in the device case. The direction of movement of the core is determined by the appropriate order of switching on the coils. At the same time, the accuracy of the displacement of the core at each step is constant both in the position of the core, to which one plate is open, located below the seal and in the position with the maximum number of open plates.

The structure of the invention is described by the relations:

1) relations for a linear electromagnetic motor (see Afonin, A.A., Bilozor, P.P., Grebeni

V.V., Dyhnenko, Y.I., - Melchichuk, L.P. Electromagnetic drive of robot-technical systems, - Kiev: Naukova Dumka, 1986, p. 124)

gaz tz (ni - 1) Ј - x0 (t - 1)

(one)

Z (H C (U0

where t is the pole division of the stator phase;

x0 - the main engine pitch; go - the number of phases of the engine (coils); t .. is the length of the non-ferromagnetic plate set; t / c is the length of the ferromagnetic set

plates.

2) ratios for the flow of gas or liquid (see TN Bashta, Mechanical Engineering Hydraulics, M .: Mashinostroenie, 1971).

Q f (U- j (P, T, ...).

(2)

where Q is the flow of gas or liquid;

f. - cross-sectional area; № - consumption coefficient; i is a function depending on pressure, temperature, and viscosity of various media.

Due to the reciprocating movement of the core, in our case, the cross-sectional area f varies. It changes following dependencies.

n S; 0 p Ј N,

(3)

n is the number of open shtastin below the seal in the housing;

S is the cross-sectional area of one capillary (slotted) plate;

N is the maximum number of plates with slots (N "300);

S e b,

(four)

where a is the slot width of the plate;

b is the plate thickness. To ensure high accuracy of the device, it is also proposed to keep the dependencies

- ° - V, T)

(five)

where x0 - the main step of the engine;

P - the value of electronic crushing step.

Estimated values of a and b can be 0.1 mm.

It is also proposed to choose the length of each packet so that it does not exceed the distance between the poles of an open magnetic circuit.

The relationship between distinctive features, such as sets of plate packs (ferromagnetic and non-ferromagnetic), a sleeve, can be further clarified.

5 and the fact that they perform two functions: serve to obtain a reciprocating movement, a linear rotor: an engine, and also serve to regulate the flow rate of gas or liquid by means of equal micros.

In the well-known in science and technology, technical solutions of this set of features with the claimed connections were not found. Therefore you can do

conclusion on the compliance of the claimed solution with the criterion. Significant differences. FIG. 1 shows the proposed electromagnetic flow regulator in section; fig 2 - section aa on

0 fig. one; on fig.Z - section bb in figure 1.

The electromagnetic flow regulator (Fig. 1) comprises a housing 1 with an output channel 2. The housing may have an arbitrary cross section, for example, circular or rectangular. It also has a center hole with a diameter (or dimensions for a non-circular cross section) greater than or equal to the diameter (dimensions) of the hollow core 3. The hollow core 3 contains a sleeve 4, which in the upper part has an entrance channel 5, and below the middle part has a longitudinal slit 6 .The upper part of the slot

5 6 must not extend beyond the upper seals with the sleeve moving upwards as much as possible. Hollow core 3 also has a regular :. alternating packs of 7, 8 ferromagnetic and non-ferromagnetic plates. These are plates of two types: plates 9 - with a narrow slit 10 (Fig. 2) and plates 11 - without slits, Plates, 9 with a narrow slit 10 are interleaved alternately in such a way

5 so that the slots do not coincide with each other. These plates are mounted on the neck 4 in the zone of the longitudinal slit 6. In the upper part of the hollow core 3, above the slit 6 of the sleeve 4 and below it,

71716487

The plates 11 are not slotted. Packages of ferromagnetic plates 7 and non-ferromagnetic plates 8. On the sleeve 4, the stresses are clamped 12. The plates 9 with the slit 10 are mounted on the sleeve 4 in such a way that the entrance of the slits coincides with the longitudinal slit 6.

For this orientation, a collar can be made on the plates, and a groove on the sleeve. Coaxially with a hollow core 3 on the housing 1 in the magnetic cores 13, open from the side of the hollow core, at least three coils 14 are placed.

For compaction. bare core 3 serve seals 15.

As a material of ferromagnetic plates, j electrical steel can be used. It can not be used as a material of the magnetic circuit. Brass, copper, 25 aluminum can be used as a material for non-ferromagnetic plates. The distance Ј between the poles of each magnetic core 13 is recommended to choose with the provision of conditions

15

20

on ve

chi i n in n

p h pr 10 ry you sa

s (n 1. k e h s s g

Јfet,

.

L (Uo. P. The following relationship is also recommended:

A - / .-fi-jt- С

(m-1); (

; When the cartridges 14 are connected in series, these relations create conditions for the longitudinal movement of the hollow core (rotor) 3, since the ferromagnetic plate package closest to the coil currently turned on tends to undergo a magnetic equilibrium between the poles of the open magnetic field. water this coil.

If coil II is turned on in the position of the hollow core (see FIG. 1), the hollow core is fixed and fixed in the indicated position, since its corresponding ferromagnetic package is in the position of magnetic equilibrium between the poles of the open magnetic circuit.

Tsy II.,

If you turn on the coil (at the same time turning off coil II), the regulator will shift to

eight

the direction of the housing 1, since the ferromagnetic plate package corresponding to the coil I is shifted relative to the poles of the open magnetic circuit of the coil I.

If you continue to turn on the coils alternately in the sequence ill-II-I-III-II-I -... or in reverse, the regulator will perform a reciprocating movement.

The device works as follows. The adjustable medium is fed through the inlet channel 5 of the sleeve 4 of the hollow core 3, and then through the longitudinal slit 6 into the slot 10 of the plates 9 and from those that are below the seal 15 flows into the outlet channel 2 of the housing 1 "

five

0

five

0 5

0

five

Alternately turning on the coils 14 in the sequences specified above leads to a slight, due to the electronic division of the pitch, raising or lowering the hollow core 3, and consequently, to a change in the number of involved (4) (open) slots (capillaries). 1.0 plates 9 which are located in the housing below the seal 15. This naturally decreases or increases the total area of the flow areas of the capillaries 10 of the plates 9 of the hollow core 3. This achieves a controlled change in the flow rate of the controlled medium.

The implementation of the device according to the invention makes it possible to increase the accuracy of the electromagnetic flow regulator in comparison with the prototype. Although in the proposed device and s prototype; the area of the passage section varies, but in the proposed device it varies linearly with respect to the movement of the regulator and in the proposed device the mode of outflow of gas or liquid in the whole range will be the same, very quickly - errors due to different speeds of working medium outflow will be excluded . Use a capillary ditch of small sections. (S Ј 0.01 mm2) shtastin of small thickness with a relatively large maximum course of the floor;

hmaks r20 30 mm

It will allow to obtain high precision flow control, increase reliability and reduce overall dimensions and weight.

Claims (1)

Invention Formula Electromagnetic flow control, comprising a housing with input and JQ output channels, in which the electromagnet winding and a hollow core with a longitudinal slot are placed, in order to increase the accuracy of the electromagnetic flow control regulator, the hollow core made in the form of a sleeve, the open end of which is connected to the inlet channel, and plates of equal thickness, fitted into the package, are mounted on the sleeve, and the plates located in the zone of the longitudinal slit are provided with slots that are connected to the longitudinal breech, and the slots adjacent plates are displaced relative to each other, the sleeve is installed in the housing with the possibility of axial movement and connection of the slots to the output channel, and the electromagnet winding is made in the form of at least three coils. i. 1 Aa 1 shz tf