CN201650914U

CN201650914U - Two-directional rotation-type high-speed switching electromagnet with high pressure resistance

Info

Publication number: CN201650914U
Application number: CN2010201465450U
Authority: CN
Inventors: 阮健; 孟彬; 李胜; 鲁立中
Original assignee: Zhejiang University of Technology ZJUT
Current assignee: Zhejiang University of Technology ZJUT
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2010-11-24
Anticipated expiration: 2020-03-31

Abstract

The utility model provides a two-directional rotation-type high-speed switching electromagnet with high pressure resistance, which comprises a front end cover and a rear end cover. The high-speed switching electromagnet further comprises a stator component and a rotor component, wherein the rotor component comprises a rotor and a rotor shaft; the rotor is mounted on the rotor shaft; and two ends of the rotor shaft are rotatably arranged on the front end cover and the rear end cover respectively; the stator component comprises a first yoke iron, a second yoke iron, a third yoke iron, a magnetic insulation ring, a coil and a permanent magnet; the first yoke iron is solid ring-shaped, and both the second yoke iron and the third yoke iron are half-opened; the first yoke iron, the second yoke iron and the third yoke iron are uniformly distributed on the outer ring of the rotor; the openings of the second yoke iron and the third yoke iron face to each other, so as to form a cavity; the magnetic insulation ring is positioned in the cavity and the coil is enwound on the magnetic insulation ring, so as to form a current excitation source; the permanent magnet is positioned between the first yoke iron and the second yoke iron and is axially magnetized to form a N pole and an S pole. The two-directional rotation-type high-speed switching electromagnet has the advantages of two-directional driving, good performance of high pressure resistance, adaptation to the working in a wet state, and high dynamic response.

Description

High-voltage resistant bidirectional rotary high-speed switch electromagnet

Technical field

The utility model belongs to the electromechanical switching mechanism that electricity (gas) liquid numeral selector valve is used in fluid transmission and the control field, relates in particular to a kind of high-voltage resistant bidirectional rotary high-speed switch electromagnet.

Background technique

Whether valve has fluid to enter can be divided into two kinds of dry type and wet types with electromechanical converter according to the armature active chamber, the latter compares with the former, can be immersed in the fluid when allowing armature work owing to its structural high pressure resistant property, thereby has good heat dissipation, it is little to rub, commutation and when resetting impact noise little, therefore the advantage that stable working and life-span are long is used increasingly extensive.

2D numeral selector valve is based on the principle of hydraulic servo spiral, rotatablely moving of spool is converted to straight line motion, thereby realizes the axial switching of valve port, with standard-sized sheet and two kinds of working staties of full cut-off of this corresponding selector valve.But the electromechanical converter of 2D numeral selector valve requires to be switch type rotary magnet bi-directional drive, high dynamic response, yet traditional rotary switch electromagnet often can only unidirectional drive, and there is no the sealed high-voltage resistant structure between its control coil and the working rotor chamber, in a single day fluid enter active chamber, thereby control coil will directly be immersed in the damage that causes electromagnet in the fluid, thereby can't work under the wet type state; In addition, the rotor of traditional rotary switch electromagnet is generally solid construction, and its rotary inertia is big, and speed of response is slower, thereby has limited the frequency range of valve and even whole electrohydraulic system, thereby for the selector valve that needs fast dynamic response, and inapplicable.

Summary of the invention

For overcome traditional rotary switch electromagnet can only unidirectional drive, no sealed high-voltage resistant structure, can't under the wet type state, work and deficiency that dynamic response is low, the utility model provide a kind of can bi-directional drive, have good high pressure resistant property, adapt to the wet type state high-voltage resistant bidirectional rotary high-speed switch electromagnet of work, high dynamic response down, it can directly be used for driving the spool of 2D numeral selector valve.

The technological scheme that its technical problem that solves the utility model adopts is:

A kind of high-voltage resistant bidirectional rotary high-speed switch electromagnet, comprise front cover and rear end cover, described high-speed switch electromagnet also comprises stator component and rotor part, described rotor part comprises rotor and rotor shaft, rotor is installed on the rotor shaft, the two ends of described rotor shaft are installed in rotation on respectively on front cover and the rear end cover, and described stator component comprises first yoke, second yoke, the 3rd yoke, magnetism resistent ring, coil and permanent magnet; Described first yoke is the filled circles ring-type; Described second yoke and the 3rd yoke all are the HALF OPENING shape, described first yoke, second yoke, the 3rd yoke are arranged in described rotor outer ring, the opening of described second yoke and the 3rd yoke is relative and form cavity, described magnetism resistent ring is positioned at described cavity, and described coil encircling is formed the current excitation source on magnetism resistent ring; Described permanent magnet changes into the N utmost point and the S utmost point between described first yoke and second yoke and by axial magnetic; Described first yoke is fixedlyed connected with front cover, and described the 3rd yoke is fixedlyed connected with rear end cover.

Further, described rotor is the thin-walled hollow rotor.

Further again, the inner peripheral surface of described first yoke, second yoke, the 3rd yoke all has identical and equally distributed two canine tooths of shape; 1/2 facewidth of the tooth of leading along clockwise direction first yoke of the tooth of described second yoke, the tooth of described the 3rd yoke falls behind 1/2 facewidth of tooth of first yoke along clockwise direction, and the outer surface of described rotor has two and equally distributed rotor tooths identical with the big odontoid of yoke.

Further, described magnetism resistent ring and described second yoke, the 3rd yoke all are tightly connected; The sidewall of described first yoke and described front cover are tightly connected, and the sidewall of described the 3rd yoke and described rear end cover are tightly connected.

The beneficial effects of the utility model mainly show: 1, adopted simple and reliable high pressure resistant structure, made electromagnet possess the ability of working under the wet type state; 2, rotor moment of inertia is little, the frequency response height, and speed of response is fast, and dynamic performance is good; But 3, electromagnet bi-directional drive; 4, because fluid can enter the working rotor chamber, electromagnet commutation and impact with noise when resetting little, working stability; 5, because electromagnet can be in the wet type working state, its control coil temperature rise is low, long service life; 6, the friction of motion component is little, and greasy property is good, helps keeping for a long time precision.

Description of drawings

Fig. 1 is a structural principle schematic representation of the present utility model.

Fig. 2 is a thin-walled hollow rotor structure schematic representation of the present utility model.

Fig. 3 a, 3b and 3c be the A-A of Fig. 1 to, B-B to, C-C to sectional view,

Fig. 4 a, 4b and 4c are working principle schematic representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

With reference to Fig. 1～Fig. 4 c, a kind of high-voltage resistant bidirectional rotary high-speed switch electromagnet, comprise stator component, rotor part, front cover 1 and rear end cover 11, described stator component is positioned at the outside of rotor part, described rotor part comprises rotor 13 and rotor shaft 3, rotor 13 is installed on the rotor shaft 3, the two ends of described rotor shaft 3 are installed in respectively on front cover 1 and the rear end cover 11, and described stator component comprises first yoke 5, second yoke 8, the 3rd yoke 9, magnetism resistent ring 14, coil 15 and permanent magnet 18; Described first yoke 5 is the filled circles ring-type; Described second yoke 8 and the 3rd yoke 9 all are the HALF OPENING shape, described first yoke 5, second yoke 8, the 3rd yoke 9 are arranged in described rotor 13 outer rings, the opening of described second yoke 8 and the 3rd yoke 9 is relative and form cavity, described magnetism resistent ring 14 usefulness non-magnet materials are made, be positioned at described cavity, described coil 15 is looped around forms the current excitation source on the magnetism resistent ring 14; Described permanent magnet 18 changes into the N utmost point and the S utmost point between described first yoke 5 and second yoke 8 and by axial magnetic; Described first yoke 5 is fixedlyed connected with front cover 1, and described the 3rd yoke 9 is fixedlyed connected with rear end cover 11.

The inner peripheral surface of described first yoke 5, second yoke 8, the 3rd yoke 9 all has identical and equally distributed two canine tooths of shape; 1/2 facewidth of the tooth of leading along clockwise direction first yoke 5 of the tooth of described second yoke 8, the tooth of described the 3rd yoke 9 fall behind 1/2 facewidth of tooth of first yoke 5 along clockwise direction.

Described rotor is made the hollow thin-wall structure, has two and equally distributed rotor tooths identical with the big odontoid of yoke on its outer surface; Described magnetism resistent ring 14 all is tightly connected with described second yoke 8, the 3rd yoke 9; The sidewall of described first yoke 5 and described front cover 1 are tightly connected, and the sidewall of described the 3rd yoke 9 and described rear end cover 11 are tightly connected.

Present embodiment is an example with the structure of two canine tooths that evenly distribute on each yoke of electromagnet and the rotor, and the utility model is described in further detail in conjunction with the accompanying drawings.

As depicted in figs. 1 and 2, the utility model comprises first yoke 5, second yoke 8, the 3rd yoke 9, magnetism resistent ring 14, coil 15, permanent magnet 18, thin-walled hollow rotor 13, rotor shaft 3, front cover 1, rear end cover 11 and seal ring 4,6,7,10,16,17; First yoke 5 is the filled circles ring-type, the opening of second yoke 8 and the 3rd yoke 9 is relative and form cavity, built-in magnetism resistent ring 14, coil 15 are looped around forms the current excitation source on the magnetism resistent ring 14, permanent magnet 18 is placed on the centre of first yoke 5 and second yoke 8 and is changed into the N utmost point and S level by axial magnetic.

When fluid enters the working rotor chamber, one side of first yoke 5 and second yoke 8 respectively has a circular groove and is used for placing seal ring 6,7, the inboard of front cover 1 and rear end cover 11 respectively has a circular groove and is used for placing seal ring 4,10, leaks out the matching gap of fluid between the electromagnet component preventing; The internal surface of magnetism resistent ring 14 has the uniform circular groove in a pair of left and right sides, is used for placing seal ring 16,17, makes coil 15 isolated with the working rotor chamber that is full of fluid; Above-mentioned is high pressure resistant simple and reliable for structure, realizes easily, thereby makes electromagnet have the ability of working under the wet type state.

The inner peripheral surface of first yoke 5, second yoke 8, the 3rd yoke 9 all has identical and equally distributed two canine tooths of shape; For reducing the rotary inertia of rotor, having designed thin-walled hollow rotor 13 matches with rotor shaft 3, have two and equally distributed rotor tooths identical on its outer surface with the big odontoid of yoke, whole rotor part is supported in front cover 1 and the rear end cover 11 by bearing 2,12, can rotate around central axis.

For satisfying the requirement of permanent magnetism polar flux and Current Control magnetic flux, front cover 1, rear end cover 11, magnetism resistent ring 14 and rotor shaft 3 are the non-magnetizer that non-magnet material is made, and first yoke 5, second yoke 8, the 3rd yoke 9 and thin-walled hollow rotor 13 are the good magnet case that the high magnetic permeability soft magnetic material is made; For strengthening heat radiation, reduce the temperature rise of coil 15, the material of magnetism resistent ring 14 also should have good heat-conducting.

Shown in Fig. 3 a, 3b and 3c, for realizing the bi-directional drive of high-voltage resistant bidirectional rotary high-speed switch electromagnet, the tooth of described second yoke 8 should leading along clockwise direction first yoke 5 1/2 facewidth of tooth, the tooth of described the 3rd yoke 9 should fall behind 1/2 facewidth of tooth of first yoke 5 along clockwise direction.

Working principle: shown in Fig. 4 a, first yoke 5, second yoke 8, the 3rd yoke 9 and thin-walled hollow rotor 13 form the working gas gap δ of three sections annulars respectively ₃, δ ₂And δ ₁In the time of coil 15 obstructed electric currents, the polarizing magnetic field that each extremely descends to have only in the working gas gap permanent magnet to produce, because whole permanent magnetic circuit is also asymmetric, its total magnetic conductance is relevant with rotor-position, electromagnet will rest on the position of the total magnetic conductance maximum of magnetic circuit automatically, it is initial rest position, this moment, the canine tooth of first yoke 5 overlapped with the canine tooth of rotor 13 outer surfaces, and the canine tooth of second yoke 8 and the 3rd yoke 9 respectively with the canine tooth of the rotor 13 outer surfaces facewidth that staggers half, electromagnet stays in initial rest position; When coil 15 feeds shown in Fig. 4 b During the electric current of direction (inwards) along paper, because the permanent magnet magnetic resistance is bigger, Current Control magnetic field and the permanent-magnet pole magnetizing field working gas gap δ of each self-forming of canine tooth on canine tooth, the 3rd yoke 9 and rotor 13 on second yoke 8 and the rotor 13 just then ₂And δ ₁Middle mutual superposition, wherein working gas gap δ ₂Following controlling magnetic field is identical with permanent-magnet pole magnetizing field direction, magnetic intensity mutual superposition and strengthening; Working gas gap δ ₁Following current field is opposite with permanent-magnet pole magnetizing field direction, and magnetic intensity is cancelled out each other and weakened, and the electric current [strength of suitable control coil 15 can be so that working gas gap δ ₁Under air-gap field approach zero, then this moment rotor 13 be subjected to the effect of electromagnetic torque and clockwise direction to rotate until itself suffered resultant moment of force be zero, this moment, rotor was in the energising equilibrium position; Similarly, when coil 15 feeds the electric current of ⊙ direction (outside along paper) shown in Fig. 4 c, working gas gap δ ₂Following controlling magnetic field is opposite with permanent-magnet pole magnetizing field direction, and magnetic intensity is cancelled out each other and weakened, as the electric current [strength of suitable control coil 15, and can be so that working gas gap δ ₂Air-gap field approach zero; Working gas gap δ ₁Following current field is identical with permanent-magnet pole magnetizing field direction, magnetic intensity mutual superposition and strengthening, then this moment rotor 13 to be subjected to the effect of electromagnetic torque and counterclockwise to rotate until itself suffered resultant moment of force be zero, this moment, rotor was in another energising equilibrium position; When coil 15 outages, electromagnet is got back to the initial rest position shown in Fig. 4 a under the effect of permanent magnet pole magnetizing field.Can see,, can control the size of rotor 13 work corners as long as the current switching of control coil 15 just can be controlled the two-way of electromagnet and come back rotation fast, and suitably adjust the structural parameter of electromagnet itself.

Above-mentioned embodiment is used for explaining the utility model; rather than the utility model limited; in the protection domain of spirit of the present utility model and claim, any modification and change to the utility model is made all fall into protection domain of the present utility model.

Claims

1. high-voltage resistant bidirectional rotary high-speed switch electromagnet, comprise front cover and rear end cover, it is characterized in that: described high-speed switch electromagnet also comprises stator component and rotor part, described rotor part comprises rotor and rotor shaft, rotor is installed on the rotor shaft, the two ends of described rotor shaft are installed in rotation on respectively on front cover and the rear end cover, and described stator component comprises first yoke, second yoke, the 3rd yoke, magnetism resistent ring, coil and permanent magnet; Described first yoke is the filled circles ring-type; Described second yoke and the 3rd yoke all are the HALF OPENING shape, described first yoke, second yoke, the 3rd yoke are arranged in described rotor outer ring, the opening of described second yoke and the 3rd yoke is relative and form cavity, described magnetism resistent ring is positioned at described cavity, and described coil encircling is formed the current excitation source on magnetism resistent ring; Described permanent magnet changes into the N utmost point and the S utmost point between described first yoke and second yoke and by axial magnetic; Described first yoke is fixedlyed connected with front cover, and described the 3rd yoke is fixedlyed connected with rear end cover.

2. high-voltage resistant bidirectional rotary high-speed switch electromagnet as claimed in claim 1 is characterized in that: described rotor is the thin-walled hollow rotor.

3. high-voltage resistant bidirectional rotary high-speed switch electromagnet as claimed in claim 1 or 2 is characterized in that: the inner peripheral surface of described first yoke, second yoke, the 3rd yoke all has identical and equally distributed two canine tooths of shape; 1/2 facewidth of the tooth of leading along clockwise direction first yoke of the tooth of described second yoke, the tooth of described the 3rd yoke falls behind 1/2 facewidth of tooth of first yoke along clockwise direction, and the outer surface of described rotor has two and equally distributed rotor tooths identical with the big odontoid of yoke.

4. high-voltage resistant bidirectional rotary high-speed switch electromagnet as claimed in claim 1 or 2 is characterized in that: described magnetism resistent ring and described second yoke, the 3rd yoke all are tightly connected; The sidewall of described first yoke and described front cover are tightly connected, and the sidewall of described the 3rd yoke and described rear end cover are tightly connected.