RU2567744C1 - Valve driving electromagnet of direct-current voltage - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: valve driving electromagnet comprises L-shaped bracket, whereat ferromagnetic cylindrical core is mounted with winding and circular pole tip. Hinged armature is coupled to the actuated mechanism. Symmetry axes of the pole tip and core coincide and are removed from inner parallel axis in a wall of L-shaped bracket to distance c. The armature is manufactured to move at actuation of the electromagnet to distance equal to value of air gap from working end surface of the pole tip along its symmetry axis. The core diameter is selected depending on the preset design counteraction effort of the driven actuated mechanism while height of the winding is selected depending on the preset design multiplicity for maximum voltage of the power supply in regard to actuation voltage of the electromagnet.

EFFECT: reduced consumed power.

2 dwg, 1 tbl

Description

The invention relates to direct current electromagnetic drives of automation devices, control devices, switching devices, for example relays and contactors.

Known valve actuating solenoid DC voltage, operating in continuous mode [1] (Fig. 1), containing a ferromagnetic cylindrical core 1 with a diameter d _c , L-shaped bracket 2 with a width b _c = 3d _c and a thickness a _c = 0.25 d _c , rotary anchor 4 with a width of b _yk equal to b _ck and a a thickness of a _yk equal to (0.8 ÷ 1) a _ck and articulated with a mechanism 5 driven, as well as a coil 6 with an insulated copper wire wound including a winding 7 thick A _o = 0.625 d _c and a height H _o = (1 ÷ 6.4) d _c . The coil 6 is mounted on the core 1, which is mounted on the L-shaped bracket 2 by one of the known methods. Moreover, the wall 8 of the coil frame is made of a thickness Δ _k = 0,1d _c ; the armature 4 before actuation of the valve actuating electromagnet is located at a distance of the working air gap δ from the working end surface 1.1 of the core 1.

Valve actuating electromagnets are effective [2] with relatively small working air gaps δ. In relation to the drive electromagnets of the relay, contactors, it is in the range of 2 mm ≤ δ ≤ 12 mm.

It is also known that with the indicated range δ, the magnetomotive response force can be reduced by using a pole piece with a diameter d _p , and hence the power consumption. Therefore, the electromagnet in question consumes increased power in the long and repeated short-term modes.

[2, с. 353] и толщиной a _п=0,2d_c, поворотный якорь 4 шириной b_як=b_ск и толщиной a _як=(0,8÷1)a _ск [2 с. 353], сочлененный с механизмом 5, приводимым в движение, а также катушку 6 с намотанной изолированным медным проводом включающей обмоткой 7. Катушка 6 насажена на сердечник 1, который закреплен на Г-образной скобе 2. При этом полюсный наконечник выполняют диаметром в соответствии с выражениемThe closest in technical essence to the inventive valve actuator solenoid DC voltage, operating in intermittent mode, is a valve actuator solenoid DC voltage (Fig. 2), containing [2] a ferromagnetic cylindrical core 1 with a diameter d _c , L-shaped bracket with a width b _ck = 3d _c and thickness a _ck = 0.25d _c [2, p. 353], round pole piece 3 with a diameter $$d_P=2d_c^{\ast }$$

[2, p. 353] and a thickness a _p = 0.2 d _c , a rotary anchor 4 of width b _yak = b _ck and a thickness a _yk = (0.8 ÷ 1) a _ck [2 p. 353], articulated with a mechanism 5, driven, as well as a coil 6 with an insulated copper wire wound including a coil 7. The coil 6 is mounted on the core 1, which is mounted on an L-shaped bracket 2. In this case, the pole piece is made with a diameter in accordance with expression

where P _mx - counteracting the operation of the electromagnet force developed by the mechanism 5;

µ _about = 4π10 ^-7 G / m is the magnetic constant of the vacuum;

.B _δ is the average value of the magnetic induction in the working air gap, selected by the graphical dependence [2] on the value of the design factor

.

Moreover, the thickness and height of the winding of the including winding 7 are respectively made by the value of A _o = 0.306 d _c and H _o = (4 ÷ 7) d _c ; [2, p. 351] the axis of symmetry of the core 1 and the pole piece 3 match; the armature 4 when the valve actuator solenoid is activated is located at a distance of the working air gap δ from the working end surface 3.1 of the pole piece 3 along its axis of symmetry.

The disadvantages of the electromagnet of FIG. 2 is that in the manufacture of its working elements in accordance with the above expressions, the conditionally useful operation of the device is 0.6 kgf · m and only with a long mode of operation [2, p. 353]. If it is necessary to obtain another value of the conditionally useful operation of the device, the values of the sizes of the working elements are not defined. This does not allow the selection of dimensional data under other operating conditions of the electromagnet.

This leads to the fact that the magnetomotive actuation force is not always optimal, and therefore [2] the power consumption is not always optimal either. The same uncertainty arises when choosing the winding height H _o from a wide range of (4 ÷ 7) d _c .

Thus, the disadvantages of such a valve actuating electromagnet are:

1) with the absence of guarantees that the selected proportions ensure the minimum power consumption of the electromagnet winding 7 in the intermittent mode of operation, due to the wide range of changes in the ratio H _o / d _c , which is not related to such initial design data as the multiplicity K _max the maximum voltage of the power source relative to the response voltage of the electromagnet and the power factor n _p overload;

2) the question of choosing other relationships of design parameters that determine the proportionalities of the magnetic system of the electromagnet such as δ / d _c , c / d _c remains open.

The technical result of the invention is the provision of a minimum sufficient power consumption by a valve actuating electromagnet of constant voltage, operating in intermittent mode under the appropriate specified design conditions for its operation, namely, the multiplicity of the maximum voltage of the power supply relative to the operating voltage of the electromagnet K _max within 1.35≤K _max ≤1,75, overload capacity coefficient n _p within 1≤n _p ≤4, overcomes the force p electromagnet _mh within about 5 N to 25 N; with a working air gap of δ within 2 mm ≤ δ ≤ 12 mm.

The above ranges of initial design data are characteristic for valve actuating electromagnets of relays, contactors, as well as other automation and control equipment.

This technical result is achieved by the fact that in the valve actuator solenoid DC voltage containing a ferromagnetic cylindrical core, a L-shaped bracket on which the core is mounted, a round pole tip, a rotary armature connected to the mechanism driven, and also a frame coil wound insulated copper wire including a winding, mounted on the core, and the axis of symmetry of the pole tip and the axis of the core coincide and are removed from the internal parallel to the axis of the walls and T-shaped bracket by a distance s, and the anchor is movable during actuation of the electromagnet by a distance equal to the value of the working air gap of the operating end surface of the pole piece along the axis of symmetry, a core diameter is made in accordance with the expression:

,

,

where δ is the magnitude of the working air gap of the electromagnet, and δ is selected within 2 mm ≤ δ ≤ 12 mm in accordance with the design assignment; z ₁ = 0.319δ-2.236; and z ₂ = 0.1595P _mx -2.392; where P _mx is the predetermined design counteraction force of the mechanism, which is set in motion, selected within 5 N ≤ P _mx ≤ 25 N in accordance with the project;

the electromagnet winding is made with a height corresponding to the expression:

H _o = d _s (1.127 + 0.016z _s -0.014z ₄ ) ⁶ ,

where z ₃ = 8K _max -12.4, where K _max is the specified design factor of the maximum voltage of the power supply relative to the operating voltage of the electromagnet, which in accordance with the project is set within 1.35≤K _max ≤1.75, and z ₄ = 1,064n _p -2,66, where n _p - specified in the range 1≤n _p ≤4 in accordance with the project power overload coefficient,

and thickness in accordance with the expression:

A _o = 0.656d _c ,

while the pole piece is made in diameter in accordance with the expression:

d _p = 1.84 d _c ,

and the axis of symmetry of the pole tip and the axis of the core coincide and are located at a distance c from parallel to the axes of the inner wall of the L-shaped bracket, in accordance with the expression:

c = 1.85d _c .

The inventive valve actuator electromagnet is manufactured taking into account predefined design parameters, namely, the multiplicity of the maximum voltage of the power supply relative to the response voltage of the electromagnet K _max in the range of 1.35≤K _max ≤1.75, power overload factor n _p within 1≤n _p ≤4, overcome by an electromagnet force P _mx in the range from 5 N to 25 N; with a working air gap of δ within 2 mm ≤ δ ≤ 12 mm.

Taking into account the specified design parameters, the valve actuating DC electromagnet contains (Fig. 2) ferromagnetic

a cylindrical core 1 made with a diameter of d _c in accordance with the expression:

,

,

where δ is the design value of the non-magnetic working gap of the electromagnet, z ₁ = 0.319δ-2.236; and z ₂ = 0.1595P _mx -2.392; where P _mx is the specified design reaction force of the mechanism driven, selected, as described above, within 5 N ≤ P _mx ≤ 25 N,

L-shaped bracket 2 with width b _ck and thickness a _ck with a core installed on it;

round pole tip 3, made with a diameter of d _p in accordance with the expression:

d _p = 1.84 d _c ,

a rotary armature 4 connected to the mechanism 5, driven by movement, which counteracts the actuation force P _mx , as well as the frame coil 6 with a winding 7 wound with an insulated copper wire. Coil 6 is mounted on core 1.

The thickness A _o and the height H _{o of the} winding of the winding 7 correspond to the expressions:

A _o = 0.656d _c

H _o = d _s (1,127 + 0,016z ₃ -0,014z ₄ ) ⁶ ,

where z ₃ = 8K _max -12.4, where K _max is the specified design multiplicity of the maximum voltage of the power supply relative to the operating voltage of the electromagnet, and z ₄ = 1.064n _p -2.66, where n _p is the power overload coefficient.

The armature 4 when the valve actuator electromagnet is triggered is at a predetermined distance equal to the working air gap 8 from the working end surface 3.1 of the round pole piece 3 to the armature surface facing it along the axis of symmetry of the pole piece. Moreover, the axis of symmetry of the pole tip and core coincide and are removed from the inner wall of the L-shaped bracket, parallel to the axes, at a distance c = 1.85 d _c .

The need to perform a valve electromagnet with elements made in accordance with the presented expressions is confirmed by experimental data reflecting its electromagnetic characteristics. Table 1 shows the results of the received power consumption by the electromagnet winding for various design data options.

From table 1 it is obvious that the use of the proposed technical solution minimizes the consumed winding of the valve drive solenoid DC power voltage in the intermittent mode of operation.

Information sources

1. Lyubchik M.A. Power electromagnets of apparatuses and devices for DC automation (Calculation and design elements) / M.A. Lyubchik. - M .: Energy, 1968. - 158 p.

2. Gordon A.V. Electromagnets of a direct current / A.V. Gordon, A.G. Slivinskaya. - M. - L .: Gosenergoizdat, 1960 .-- 447 p.

Claims (1)

A valve actuating DC electromagnet containing a ferromagnetic L-shaped bracket with a cylindrical core mounted on it, a round pole tip, a rotary armature connected to the mechanism driven, and also a frame coil with an insulated copper wire wound around the core and wound around it, moreover, the axis of symmetry of the pole tip and the axis of the core coincide and are removed from the inner wall of the L-shaped bracket parallel to the axis by a distance c, and the anchor is made with the possibility the displacement during the operation of the electromagnet at a distance equal to the value of the working air gap from the working end surface of the pole tip along its axis of symmetry, characterized in that the diameter of the core is made in accordance with the expression

,
where δ is the magnitude of the working air gap of the electromagnet, and δ is selected within 2 mm≤δ≤12 mm in accordance with the project, z ₁ = 0.319δ-2.236, and z ₂ = 0.1595P _mx -2.392, where P _mx is the design predetermined counteraction force of the mechanism, set in motion, selected within 5 Newton ≤P _mx ≤25 Newton in accordance with the project; the winding of the electromagnet is made with a height corresponding to the expression
H _o = d _s (1.127 + 0.016 z _s -0.014 z ₄ ) ⁶ ,
where z _z = 8K _max -12.4, where K _max is the specified design factor of the maximum voltage of the power supply relative to the operating voltage of the electromagnet, which in accordance with the project is set within 1.35≤K _max ≤1.75, az ₄ = 1,064 n _p -2.66, where n _p is the specified overload power factor, specified in the range 1≤n _p ≤4,
and thickness in accordance with the expression
A _o = 0.656 d _c ,
wherein the pole piece is made in diameter in accordance with the expression
d _p = 1.84 d _c ,
and the distance c from the inner wall of the L-shaped bracket parallel to the axes of the pole piece and the core to the axes is selected in accordance with the expression
c = 1.85 d _c .

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