阅读说明：本技术 高频直动式力马达 (High-frequency direct-acting type power motor ) 是由 孟彬 刘备 王登 蒲涛 徐豪 黄煜 于 2019-04-23 设计创作，主要内容包括：一种高频直动式力马达,包括衔铁部件、轭铁部件、复位弹簧部件,第一衔铁长边的对角线上各凸出一个方向相反的90°的凸台,第一衔铁的两端各有一个长方形的凹槽,第一永磁体、第二永磁体均被径向充磁成N级和S极,第一衔铁两端长方形的凹槽内分别与第一永磁体、第二永磁体的N极面贴合,第一衔铁的一对凸台被磁化成N极端；第一衔铁、第二衔铁结构完全相同,反向相互扣合；第二衔铁的一对凸台被磁化成S极端；第一衔铁、第二衔铁夹紧推杆左端,推杆的右端连接复位弹簧部件和伺服比例阀的阀芯；第一控制线圈和第二控制线圈安装在轭铁架的环形槽内,衔铁部件安装在轭铁架内,第一衔铁的一对凸台、第二衔铁的一对凸台分别与轭铁架形成四个工作气隙。(A high-frequency direct-acting type force motor comprises an armature component, a yoke component and a return spring component, wherein 90-degree bosses with opposite directions protrude from diagonal lines of long sides of a first armature respectively, rectangular grooves are formed in two ends of the first armature respectively, a first permanent magnet and a second permanent magnet are magnetized radially to form an N-level pole and an S-level pole, the rectangular grooves in the two ends of the first armature are attached to N-level faces of the first permanent magnet and the second permanent magnet respectively, and a pair of bosses of the first armature are magnetized to form an N-level pole; the first armature and the second armature are completely the same in structure and are buckled with each other in a reverse direction; a pair of bosses of the second armature are magnetized to S-pole ends; the first armature and the second armature clamp the left end of the push rod, and the right end of the push rod is connected with a return spring component and a valve core of the servo proportional valve; the first control coil and the second control coil are installed in an annular groove of the yoke iron frame, the armature component is installed in the yoke iron frame, and a pair of bosses of the first armature and a pair of bosses of the second armature form four working air gaps with the yoke iron frame respectively.)

1. A high-frequency direct-acting type force motor is characterized in that: the magnetic field excitation type magnetic field excitation device comprises an armature component, a yoke component, a reset spring component, a front end cover, a first shell and a second shell, wherein the armature component comprises a first armature and a second armature, a push rod, a first permanent magnet and a second permanent magnet, 90-degree bosses in opposite directions protrude from diagonal lines of long edges of the first armature respectively, rectangular grooves are formed in two ends of the first armature respectively, the first permanent magnet and the second permanent magnet are radially magnetized into an N-level pole and an S-pole, the rectangular grooves in the two ends of the first armature are respectively attached to N-pole surfaces of the first permanent magnet and the second permanent magnet, and a pair of bosses of the first armature and the first armature are magnetized into an N-pole by the first permanent magnet and the second permanent magnet; the first armature and the second armature are completely identical in structure and are buckled with each other in a reverse direction; the rectangular grooves at two ends of the second armature are respectively attached to S pole surfaces of the first permanent magnet and the second permanent magnet, and a pair of bosses of the second armature are magnetized into S pole surfaces by the first permanent magnet and the second permanent magnet; the first armature and the second armature clamp the left end of the push rod, the middle part of the push rod is installed in a linear bearing on the second shell, the right end of the push rod is connected with a return spring component, and the part of the right end of the push rod exposed out of the front end cover is directly connected with a valve core of the servo proportional valve;

the yoke part comprises a yoke iron frame, a first control coil and a second control coil, two annular grooves are formed in the left end of the yoke iron frame, the first control coil and the second control coil are respectively installed in the annular grooves of the yoke iron frame, a pair of vertically symmetrical pole shoes protrudes from the inside of the middle part of the yoke iron frame, and a pair of vertically symmetrical pole shoes protrudes from the inside of the right end of the yoke iron frame; the armature component is arranged in an inner space formed by four pole shoes of the yoke iron frame, at the moment, a pair of bosses of the first armature respectively form a first working air gap and a third working air gap with an upper pole shoe at the middle part and a lower pole shoe at the right end part of the yoke iron frame, a pair of bosses of the second armature respectively form a second working air gap and a fourth working air gap with the lower pole shoe at the middle part and the upper pole shoe at the right end part of the yoke iron frame, and the first working air gap, the second working air gap, the third working air gap and the fourth working air gap are completely equal in size under the condition of not electrifying; the yoke iron frame is installed in a rectangular opening groove of the first shell.

2. The high frequency direct acting force motor as claimed in claim 1, wherein: the reset spring part comprises a reset spring, a first spring base, a second spring base and a second spring base limiting ring, the first spring base is installed at the left end of the second shell, the second spring base is installed in an annular groove at the left end of the front end cover, the second spring base limiting ring is installed at the right end of the second spring base, the left end of the reset spring is installed at the first spring base, the right end of the reset spring is installed at the second spring base, the right end of the first shell is opened and is connected with the left end of the second shell in a sealing mode, and the left end of the front end cover is connected with the right end of the second shell in a sealing mode.

3. The high frequency direct acting force motor as claimed in claim 1, wherein: one surface of the first armature is provided with a first square groove and a second square groove, the first square groove and the second square groove are respectively attached to the N pole surfaces of the first permanent magnet and the second permanent magnet, and a pair of bosses of the first armature are magnetized into N pole ends by the first permanent magnet and the second permanent magnet; the structure of the second armature is the same as that of the first armature, one surface of the second armature, which is provided with a groove, is attached to S poles of the first permanent magnet and the second permanent magnet which are attached to the groove of the first armature, and a pair of bosses of the second armature and the second armature are magnetized into S pole ends by the first permanent magnet and the second permanent magnet; the first armature and the second armature are provided with the first permanent magnet and the second permanent magnet to form a through hole, and the through hole is used for mounting the push rod.

4. The high frequency direct acting force motor as claimed in claim 1, wherein: the front end cover, the push rod, the first spring base, the second spring base, the first shell and the second shell are all non-magnetizers made of non-magnetic materials; the yoke iron, the first armature iron and the second armature iron are all magnetizers made of soft magnetic materials.

Technical Field

The invention belongs to an electro-mechanical converter for a servo proportional valve in the field of fluid transmission and control, and particularly relates to a high-frequency direct-acting type power motor.

Technical Field

The valve electric-mechanical converter can be divided into a linear displacement type and an angular displacement type according to the form of a movable piece, and can be divided into a moving iron type and a moving coil type according to the structural form of the movable piece, and compared with the moving coil type torque motor, the moving iron type torque motor has the advantages of high working efficiency, small volume and light weight, so that the valve electric-mechanical converter is increasingly widely applied.

The traditional proportional electromagnet has the function of proportionally converting a current signal output by a control amplifier into force or displacement, but because the traditional proportional electromagnet has a large volume and can only provide unidirectional driving force for the servo proportional valve, the servo proportional valve needs to adopt two proportional electromagnets to realize reversing, the mass of the servo proportional valve is increased, the response speed is slow, and the proportional electromagnet is not suitable for use occasions requiring fast dynamic response.

Disclosure of Invention

In order to realize the output of the linear direction reciprocating force of the force motor for the servo proportional valve and enable the force motor to output the thrust and the pull, the invention provides the force motor with a high-frequency response and double-helix magnetic circuit topological structure.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a high frequency direct action type force motor, includes armature part, yoke part, reset spring part, front end housing, first shell and second shell, armature part includes first armature and second armature, push rod, first permanent magnet and second permanent magnet, respectively protrusion 90' S of opposite direction boss on the diagonal on first armature long limit, the both ends of first armature respectively have a rectangular recess, first permanent magnet, second permanent magnet are all radially magnetized into N level and S utmost point, laminate with the N utmost point face of first permanent magnet, second permanent magnet in the rectangular recess in first armature both ends respectively, a pair of boss of first armature and first armature is all magnetized into N extremely by first permanent magnet, second permanent magnet. The first armature and the second armature are completely identical in structure and are buckled with each other in a reverse direction. The rectangular grooves at two ends of the second armature are respectively attached to S pole faces of the first permanent magnet and the second permanent magnet, and a pair of bosses of the second armature are magnetized into S pole faces by the first permanent magnet and the second permanent magnet. The left end of the push rod is clamped by the first armature and the second armature, the middle part of the push rod is installed in a linear bearing on the second shell, the right end of the push rod is connected with a return spring component, and the part of the right end of the push rod exposed out of the front end cover is directly connected with a valve core of the servo proportional valve.

The yoke part comprises a yoke iron frame, a first control coil and a second control coil, two annular grooves are formed in the left end of the yoke iron frame, the first control coil and the second control coil are respectively installed in the annular grooves of the yoke iron frame, a pair of vertically symmetrical pole shoes protrudes from the inside of the middle part of the yoke iron frame, and a pair of vertically symmetrical pole shoes protrudes from the inside of the right end of the yoke iron frame. The armature component is arranged in an inner space formed by four pole shoes of the yoke iron frame, at the moment, a pair of bosses of the first armature respectively form a first working air gap and a third working air gap with an upper pole shoe at the middle part and a lower pole shoe at the right end part of the yoke iron frame, a pair of bosses of the second armature respectively form a second working air gap and a fourth working air gap with the lower pole shoe at the middle part and the upper pole shoe at the right end part of the yoke iron frame, and the first working air gap, the second working air gap, the third working air gap and the fourth working air gap are completely equal in size under the condition of no electrification. The yoke iron frame is installed in a rectangular opening groove of the first shell.

Further, the reset spring part includes reset spring, first spring holder, second spring holder and second spring holder spacing ring, first spring holder installs the left end at the second shell, second spring holder installs in the annular groove of front end housing left end, the right-hand member at second spring holder is installed to second spring holder spacing ring, reset spring's left end is installed at first spring holder, reset spring's right-hand member is installed at second spring holder, first shell right-hand member opening with second shell left end sealing connection, the left end of front end housing with the right-hand member sealing connection of second shell.

As a preferred scheme, one surface of the first armature is provided with a first square groove and a second square groove, the first square groove and the second square groove are respectively attached to the N pole surfaces of the first permanent magnet and the second permanent magnet, and a pair of bosses of the first armature are magnetized into N pole ends by the first permanent magnet and the second permanent magnet; the structure of the second armature is the same as that of the first armature, one surface of the second armature, provided with the groove, is attached to S poles of the first permanent magnet and the second permanent magnet which are attached to the first armature groove, and a pair of bosses of the second armature and the second armature are magnetized to S poles by the first permanent magnet and the second permanent magnet. The first armature and the second armature are provided with the first permanent magnet and the second permanent magnet to form a through hole, and the through hole is used for mounting the push rod.

Furthermore, the front end cover, the push rod, the first spring base, the second spring base, the first shell and the second shell are all non-magnetizers made of non-magnetic materials; the yoke iron, the first armature iron and the second armature iron are all magnetizers made of soft magnetic materials.

The invention has the following beneficial effects:

1. the high-frequency direct-acting force motor armature component is small in moving inertia, compact in structure, light in weight and large in horizontal output force.

2. The armature structural design is double-spiral structure, and two armature symmetries are laminated, and open on the surface has two square groove for the radial positioning of permanent magnet has realized the novel magnetic circuit design of double-spiral magnetic circuit topological structure, satisfies the required polarization magnetic flux of high frequency direct action formula force motor.

3. The push rod of the high-frequency direct-acting type power motor is directly connected with one side of the valve core of the servo proportional valve, so that the bidirectional linear control of the valve is realized, the dynamic performance is good, and the response speed is high.

Drawings

Fig. 1 is a schematic diagram of the structural principle of the present invention.

Fig. 2a is a schematic view of a first armature construction of the present invention.

Fig. 2b is a schematic view of the assembly of the first armature, the first permanent magnet and the second permanent magnet of the present invention.

Fig. 2c is a schematic view of the assembly of the first armature, the second armature, the first permanent magnet, and the second permanent magnet of the present invention.

Fig. 3 is a schematic view of the yoke structure of the present invention.

Fig. 4a (1), fig. 4b (1), fig. 4c (1), fig. 4d (1) are assembly diagrams of an armature component and a yoke component, in which:

FIG. 4a (2) is the first working air gap of FIG. 4a (1)₁Enlarging the picture;

FIG. 4b (2) is the second working air gap of FIG. 4b (1)₂Enlarging the picture;

FIG. 4c (2) is the third working air gap of FIG. 4c (1)₃Enlarging the picture;

FIG. 4d (2) is a fourth working air gap of FIG. 4d (1)₄Enlargement.

FIG. 5 is a schematic diagram of the operating principle of the present invention, showing the magnetic flux conditions inside the invention when the control coil is not energized:

fig. 6(1), 6(2) show the magnetic flux state inside the present invention when the control coil is in two current-carrying directions, respectively.

Detailed Description

The present invention will now be described specifically by way of examples.

Referring to fig. 1 to 6(2), a high-frequency direct-acting type force motor comprises an armature component, a yoke component, a return spring component, a front end cover 8, a first shell 1 and a second shell 9, the armature component comprises a first armature 11 and a second armature 12, a push rod 7, a first permanent magnet 15 and a second permanent magnet 16, each of the first armature 11 has a boss projecting 90 deg. in opposite direction on the diagonal of the long side, two rectangular grooves are respectively arranged at two ends of the first armature 11, the first permanent magnet 15 and the second permanent magnet 16 are radially magnetized into N-level and S-level poles, rectangular groove wall surfaces at two ends of the first armature 11 are respectively attached to N pole surfaces of the first permanent magnet 15 and the second permanent magnet 16, a pair of bosses of the first armature 11 are magnetized to N pole ends by a first permanent magnet 15 and a second permanent magnet 16, and an arc-shaped groove is formed in the middle of the first armature 11. The first armature 11 and the second armature 12 have the same structure and are buckled with each other in opposite directions. Rectangular groove wall surfaces at two ends of the second armature 12 are respectively attached to S pole surfaces of the first permanent magnet 15 and the second permanent magnet 16, and a pair of bosses of the second armature 12 are magnetized into S pole ends by the first permanent magnet 15 and the second permanent magnet 16. After the rectangular grooves of the first armature 11 and the second armature 12 are respectively attached with the first permanent magnet 15 and the second permanent magnet 16, an arc-shaped groove in the middle of the first armature 11 and an arc-shaped groove in the middle of the second armature 12 form an incomplete round hole, the left end of the push rod 7 is clamped in the incomplete round hole, two shaft shoulders of the left end of the push rod 7 are respectively clamped at the left end and the right end of the armature component, the middle part of the push rod 7 is installed in a linear bearing 10 in interference fit with the second housing 8, the first spring base 3 and the second spring base 5 are installed at the right end of the push rod 7, and the right end of the push rod 7 is directly connected with a valve core of the servo proportional valve from the protruding part of the right end of the second spring base limiting ring 6.

The yoke part comprises a yoke iron frame 2, a first control coil 13 and a second control coil 14, two annular grooves are formed in the left end portion of the yoke iron frame 2, the first control coil 13 and the second control coil 14 are wound in the annular grooves of the yoke iron frame 2 respectively, a pair of vertically symmetrical pole shoes protrudes from the inside of the middle portion of the yoke iron frame 2, and a pair of vertically symmetrical pole shoes protrudes from the inside of the right end portion of the yoke iron frame 2. The armature member is installed in an inner space formed by four pole shoes of the yoke frame 2, and at this time, a pair of bosses of the first armature 11 respectively form a first working air gap with an upper pole shoe at the middle part and a lower pole shoe at the right end part of the yoke frame 2₁A third working air gap₃A pair of bosses of the second armature 12 are respectively connected with the lower pole shoe of the middle part and the upper pole shoe of the right end part of the yoke frame 2Form a second working air gap₂A fourth working air gap₄Said first working air gap₁A second working air gap₂A third working air gap₄A fourth working air gap₄In the case of no power, the magnitudes are exactly equal. The yoke iron frame 2 is installed in a rectangular opening groove of the first housing 1.

The reset spring component comprises a reset spring 4, a first spring base 3, a second spring base 5 and a second spring base limiting ring 6. First spring holder 3 installs the left end at second shell 9, second spring holder 5 installs in the annular groove of the 8 left ends of front end housing, second spring holder spacing ring 6 installs the right-hand member at second spring holder 5, reset spring 4's left end is installed at first spring holder 3, reset spring 4's right-hand member is installed at second spring holder 5, 1 right-hand member opening of first shell with 9 left ends of second shell sealing connection, front end housing 8's left end with the right-hand member sealing connection of second shell 9.

The working principle is as follows: in fig. 4a (1), fig. 4b (1), fig. 4c (1), fig. 4d (1), the first armature 11, the second armature 12 and the yoke 2 form a four-stage working air gap₁、₂、₃、₄When the first control coil 13 and the second control coil 14 are not supplied with current, the working air gap₁、₂、₃And₄the sizes are completely equal. The distribution of the polarized magnetic fluxes generated by the first and second permanent magnets 15 and 16 in the yoke and armature members is shown by the dashed line in fig. 5, in which the dotted line represents the magnetic flux distribution of the polarized magnetic flux in the second armature 12, and the distribution patterns 6(1) of the control magnetic fluxes generated by the first and second control coils 13 and 14 in the yoke and armature members, and the solid line in fig. 6(2), in which the dotted line represents the magnetic field distribution of the control magnetic flux in the second armature 12. When the first control coil 13 and the second control coil 14 are not electrified, the working air gap₁、₂、₃、₄In the interior, only the polarized magnetic flux produced by first permanent magnet 15 and second permanent magnet 16, the armature component is in the middle position of space formed by four pole shoes in yoke 2, because of polarized magnetic fluxAt the working air gap₁、₂、₃、₄The internal distribution amount is the same, so the magnetic attraction force borne by the first armature 11 and the second armature 12 is the same, and at the moment, the armature part of the high-frequency direct-acting type force motor is in a middle position and outputs no force; when the armature member shown in fig. 5 is positioned at the initial position, and the first control coil 13 and the second control coil 14 are energized in the current direction as shown in fig. 6(1), the current control magnetic flux and the permanent magnet polarized magnetic flux are in the working air gap₁、₂、₃、₄Mutually overlapping, wherein in the working air gap₁、₂The direction of the internal current control magnetic flux is opposite to that of the permanent magnet polarized magnetic flux, the intensity of the magnetic flux is weakened, and the magnetic flux is in the working air gap₃、₄The direction of the internal current control magnetic flux is the same as that of the permanent magnet polarized magnetic flux, and the magnetic flux strength is enhanced; the armature part is then subjected to a downward thrust, the resultant of this thrust and the spring force of the return spring 4 gradually decreasing to zero, the armature part reaches a new position equilibrium, the return spring 4 is in a compressed state, in which the working air gap is present₁、₂Are all increased to'₁、’₂Working air gap₃、₄Are reduced to'₃、’₄With the armature member in the position shown in fig. 6 (1); when the first and second control coils 13 and 14 are powered off, an air gap is operated at this time'₁、’₂、’₃、’₄The current control magnetic flux in the current control magnetic circuit disappears, the thrust borne by the armature component disappears, and the armature component returns to the original initial position and the working air gap 'under the action of the upward elastic force of the return spring 4'₁、’₂、’₃、’₄Is restored to₁、₂、₃、₄(ii) a When the first control coil 13 and the second control coil 14 are energized with current in the directions shown in fig. 6(2), the current control magnetic flux and the permanent magnet polarized magnetic flux are in the working air gap₁、₂、₃、₄The inner sides are superposed with each other. Wherein in the working air gap₁、₂The direction of the internal current control magnetic flux is the same as that of the permanent magnet polarized magnetic flux, the intensity of the magnetic flux is enhanced, and the magnetic flux is arranged in a working air gap₃、₄The direction of the internal current control magnetic flux is opposite to that of the permanent magnet polarized magnetic flux, and the intensity of the magnetic flux is weakened; the armature part is subjected to an upward thrust, the resultant of the thrust and the spring force of the return spring 4 is gradually reduced to zero, the armature part reaches a new position equilibrium again, the return spring 4 is in a compressed state, the working air gap therein₁、₂Are the same, all reduce to "₁、”₂Working air gap₃、₄Are the same, all increase to "₃、”₄With the armature member in the position shown in fig. 6 (2); when the first control coil 13 and the second control coil 14 are powered off, the working air gap is formed at the moment "₁、”₂、”₃、”₄The current in the armature control magnetic flux disappears, the thrust borne by the armature component disappears, and under the action of the downward elastic force of the return spring 4, the armature component returns to the original initial position again, namely a working air gap "₁、”₃、”₂、”₄Is restored to₁、₂、₃、₄. It can be seen that under the differential superposition of the current control magnetic flux and the permanent magnet polarized magnetic flux, the armature component can complete one reciprocating motion after two changes of the electrifying mode. By repeating the above-described energization, the armature member continues to reciprocate in a linear direction.

The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.