CN213748245U

CN213748245U - Servo valve torque motor armature magnetic conduction surface detection device

Info

Publication number: CN213748245U
Application number: CN202023240541.1U
Authority: CN
Inventors: 陈曦
Original assignee: Chongqing Wentong Electromechanical Co ltd
Current assignee: Chongqing Wentong Electromechanical Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-07-20
Anticipated expiration: 2030-12-29

Abstract

In order to solve the problem that the detection mode of the armature magnetic conduction surface of the servo valve torque motor in the prior art cannot detect whether two magnetic conduction surfaces are on the same horizontal plane or not, the utility model provides a detection device of the armature magnetic conduction surface of the servo valve torque motor, which comprises a base plate, a supporting table, a dial gauge seat and a dial gauge; the substrate is of a rectangular plate structure, and a support table is arranged in the middle of the substrate; the supporting platform is of a stepped cylindrical structure, a bottom column, a supporting column, a large-hole fixing column and a small-hole fixing column are sequentially arranged from bottom to top, and the diameters of the supporting platform and the supporting column are sequentially reduced; the diameters of the large hole fixing column and the small hole fixing column are respectively matched with the large hole and the small hole of the central through hole of the armature; the dial gauge seats are two and are respectively arranged on two sides of the supporting platform; the dial indicator is fixed on the dial indicator seat, and the detection probes of the dial indicator are all pointed to the supporting table. The beneficial technical effects of the utility model are that can detect at same horizontal plane and error to the magnetic conduction face of two ends of armature.

Description

Servo valve torque motor armature magnetic conduction surface detection device

Technical Field

The utility model relates to high accuracy servo valve torque motor armature production technology, in particular to servo valve torque motor armature magnetic conduction face detection device.

Background

The servo valve is a key component for converting an electrical signal into a proportional hydraulic signal, and the torque motor is a key component for converting an electrical signal into a proportional rotary motion in the servo valve. The torque motor comprises a permanent magnet, a lower pole shoe, an upper pole shoe, an armature, a coil and other parts (see figure 1). The permanent magnet is a cuboid, U-shaped grooves for accommodating fastening bolts are formed in two side faces in the length direction along the height direction, and the permanent magnet is magnetized in the height direction; the lower pole shoe and the upper pole shoe are rectangles with four cut corners, and two opposite sides in the length direction are provided with pole heads extending inwards; the armature is a geometrically symmetric long strip-shaped structure, the middle section of the armature is a step with a rectangular cross section, a central through hole is arranged in the center of the rectangular step perpendicular to the direction of the long strip axis, two ends of the armature are cylindrical rods, and the ends of the cylindrical rods are flat heads with rectangular cross sections; the coil is sleeved on the cylindrical rods at the two ends of the armature. When the permanent magnet is installed, the two permanent magnets are arranged between the upper pole shoe and the lower pole shoe, so that a uniform magnetic field is formed between the pole heads at the two ends of the upper pole shoe and the lower pole shoe; the armature is arranged on a thin-wall spring tube and is rigidly and fixedly connected with the baffle plate and the feedback rod, and rectangular flat heads at two ends of the armature are positioned in a pole shoe magnetic field. When current is passed through the coil, the magnetic field generated by the coil interacts with the pole piece magnetic field, causing the armature to deflect relative to the axis of the central bore. The deflection of the armature drives the baffle and the feedback rod which are rigidly and fixedly connected with the armature to move, and the opening degree and the opening direction of the nozzle and the slide valve which are related to the baffle and the feedback rod are changed, so that the liquid flow which is related to the baffle and the feedback rod is changed, and the effect of converting the electric signal into the hydraulic signal which is in direct proportion to the electric signal is realized.

In the case of high-precision and high-reliability control, the moment motor is required to have higher sensitivity, precision and reliability between the received electric signal and the generated deflection motion. To meet the requirement, the stability and reliability of the electromagnetic performance of the torque motor must be ensured. In particular for armatures, high dimensional accuracy is required (typically within three thousandths of a millimeter of dimensional tolerance) in addition to material properties that must meet the relevant requirements. Especially, the magnetic conduction surfaces of the two ends of the armature are respectively positioned in two magnetic fields formed by pole head surfaces of the pole shoes, and if the magnetic conduction surfaces of the two ends of the armature are not on the same horizontal plane, the sensitivity and the reliability of the torque motor are seriously influenced. Whether the magnetic conduction surfaces of the two ends of the armature are on the same horizontal plane or not means whether the magnetic conduction surfaces of the two ends of the armature are on the same horizontal plane or not when the axis of the central hole of the armature is vertical to the horizontal plane. In the prior art, when the armature magnetic conduction surface is detected, a high-precision vernier caliper or a micrometer is adopted to measure the distance between the two magnetic conduction surfaces, so that whether the magnetic conduction surfaces of two ends of the armature are on the same horizontal plane or not and the error of the magnetic conduction surfaces can not be detected.

Obviously, the detection method for the magnetic conduction surfaces of the armature of the torque motor of the servo valve in the prior art has the problems that whether the magnetic conduction surfaces of two ends of the armature are on the same horizontal plane, the error of the magnetic conduction surfaces cannot be detected and the like.

Disclosure of Invention

Whether two magnetic surfaces of leading of unable detection that exist for solving prior art servo valve torque motor armature magnetic surface detection mode are on same horizontal plane scheduling problem, the utility model provides a servo valve torque motor armature magnetic surface detection device.

The utility model discloses servo valve torque motor armature magnetic conduction surface detection device, include, base plate, brace table, amesdial seat and amesdial; the substrate is of a rectangular plate structure, and a support table is arranged in the middle of the substrate; the supporting platform is of a stepped cylindrical structure, a bottom column, a supporting column, a large-hole fixing column and a small-hole fixing column are sequentially arranged from bottom to top, and the diameters of the supporting platform and the supporting column are sequentially reduced; the diameters of the large hole fixing column and the small hole fixing column are respectively matched with the large hole and the small hole of the central through hole of the armature; the dial gauge seats are two and are respectively arranged on two sides of the supporting platform; the dial indicator is fixed on the dial indicator seat, and the detection probes of the dial indicator are all pointed to the supporting table.

Furthermore, the cylindrical surfaces of the large-hole fixing columns and the small-hole fixing columns of the supporting platform are provided with angles which incline outwards from top to bottom to the axis, and the inclination angle is 0.1-0.3 degrees.

Furthermore, a rotating bearing is arranged between the bottom column of the supporting table and the supporting column, and the supporting column can rotate around the bottom column of the supporting table.

Furthermore, the end of the support column of the support table is provided with four steps for positioning the rectangular body in the middle section of the armature, and the four positioning steps are distributed at four corners on the circular end surface of the support column; the distance between the left step and the right step is matched with the axial length of the rectangular body in the middle section of the armature; the distance between the front step and the rear step is matched with the diameter of the armature cylindrical rod.

The utility model discloses servo valve torque motor armature magnetic conduction face detection device's beneficial technological effect is whether can detect at same horizontal plane and error to the magnetic conduction face of two ends of armature.

Drawings

FIG. 1 is a schematic diagram of a servo valve torque motor;

FIG. 2 is a schematic diagram of a servo valve torque motor armature;

FIG. 3 is a schematic cross-sectional view of a servo valve torque motor armature;

FIG. 4 is a schematic structural diagram of the detection device for the armature magnetic conduction surface of the torque motor of the servo valve of the present invention;

fig. 5 is a schematic structural diagram of the supporting pillar end of the servo valve torque motor armature magnetic conductive surface detection device of the present invention.

The following describes the armature magnetic conductive surface detection device of the torque motor of the servo valve according to the present invention with reference to the accompanying drawings and embodiments.

Detailed Description

Fig. 1 is a schematic structural diagram of a servo valve torque motor, in which 1 is a permanent magnet, 2 is a lower pole shoe, 3 is an upper pole shoe, 4 is an armature, and 5 is a coil. FIG. 2 is a schematic structural diagram of a pole shoe of a torque motor of a servo valve, wherein A is a magnetic conduction surface of two ends of an armature; fig. 3 is a schematic cross-sectional view of a servo valve torque motor armature, from which it can be seen that the armature central bore is a combination of large and small bores.

Fig. 4 is the utility model discloses servo valve torque motor armature leads magnetic surface detection device's structural schematic, and fig. 5 is the utility model discloses servo valve torque motor armature leads magnetic surface detection device support column end's structural schematic, and in the figure, 6 are the base plate, and 7 are a supporting bench, and 7-1 is the foundation column, and 7-2 is the support column, and 73 is the macropore fixed column, and 7-4 is the location step, and 7-5 is the aperture fixed column, and 8 are the amesdial seat, and 9 is the amesdial. The graph shows that the armature magnetic conduction surface detection device of the torque motor of the servo valve comprises a base plate 6, a supporting table 7, a dial indicator seat 8 and a dial indicator 9; the substrate 6 is of a rectangular plate structure, and a support table 7 is arranged in the middle of the substrate; the supporting platform 7 is of a stepped cylindrical structure, is sequentially provided with a bottom column 7-1, a supporting column 7-2, a large-hole fixing column 7-3 and a small-hole fixing column 7-5 from bottom to top, and the diameters of the supporting platform and the small-hole fixing column are sequentially reduced; wherein, the diameters of the big hole fixing column 7-3 and the small hole fixing column 7-5 are respectively matched with the big hole and the small hole of the central through hole of the armature; the number of the dial indicator seats 8 is two, and the dial indicator seats are respectively arranged on two sides of the supporting platform 7; the dial indicator 9 is fixed on the dial indicator seat 8, and the detection probes of the dial indicator are all directed to the supporting table. During detection of the tool, the armature central hole is downwards sleeved on the large hole fixing column of the supporting table, and at the moment, the armature central hole small hole is also sleeved on the small hole fixing column of the supporting table. The armature is rotated around the axis of the support table, the magnetic conduction surfaces of the two ends of the armature contact the dial indicator detection probe, and the armature is slid by the distance of the width of the magnetic conduction surface under the dial indicator detection probe. And by observing the change condition of the pointer indication value of the dial indicator, whether the magnetic conduction surfaces of the two ends of the armature are on the same horizontal plane or not and the error of the magnetic conduction surfaces can be detected. After the magnetic conduction surface on one side of the small hole of the central hole of the armature is detected, the armature is taken down, the small hole of the central hole of the armature is downwards sleeved on the small hole fixing column of the supporting table, and the magnetic conduction surface on one side of the large hole of the central hole of the armature is detected. Of course, before detection, the standard module is needed to calibrate the detection position of the dial indicator detection probe and the indicated value of the dial indicator pointer, so that the detection data can be obtained more accurately and intuitively.

In order to more stably and accurately fix the armature on the supporting platform, the cylindrical surfaces of the large-hole fixing column and the small-hole fixing column of the supporting platform are provided with angles which incline outwards from top to bottom towards the axis, and the inclination angle is 0.1-0.3 degrees. Therefore, when the large hole or the small hole of the armature central hole is sleeved on the large hole fixing column or the small hole fixing column of the support table, the armature central hole can be positioned better along the taper, and the axis of the armature central hole is ensured to be coaxial with the axis of the support table and to be vertical to the plane of the substrate.

In order to reduce detection errors caused by manually rotating the armature around the axis of the support table, a rotating bearing is arranged between the bottom column and the support column of the support table, and the support column can rotate around the bottom column of the support table. Therefore, after the armature is fixed on the support table, the support column is manually rotated instead of the armature, and detection errors caused by manually rotating the armature around the axis of the support table are avoided.

In order to prevent the armature from sliding circumferentially relative to the support column when the support column rotates around the support table bottom column; the end of the support pillar of the support platform is provided with four positioning steps for positioning the rectangular body in the middle section of the armature, and the four positioning steps are distributed at four corners on the circular end surface of the support pillar; the distance between the left step and the right step is matched with the axial length of the rectangular body in the middle section of the armature; the distance between the front step and the rear step is matched with the diameter of the armature cylindrical rod. Like this when armature suit back on the support column, the location step blocks armature middle section cuboid for when the support column rotated around a supporting bench foundation, armature can not produce the circumference for the support column and slide.

Obviously, the utility model discloses servo valve torque motor armature magnetic conduction face detection device's beneficial technological effect is whether can detect at same horizontal plane and error to the magnetic conduction face of two ends of armature.

Claims

1. A detection device for a magnetic conduction surface of an armature of a torque motor of a servo valve is characterized by comprising a substrate, a supporting table, a dial gauge seat and a dial gauge; the substrate is of a rectangular plate structure, and a support table is arranged in the middle of the substrate; the supporting platform is of a stepped cylindrical structure, a bottom column, a supporting column, a large-hole fixing column and a small-hole fixing column are sequentially arranged from bottom to top, and the diameters of the supporting platform and the supporting column are sequentially reduced; the diameters of the large hole fixing column and the small hole fixing column are respectively matched with the large hole and the small hole of the central through hole of the armature; the dial gauge seats are two and are respectively arranged on two sides of the supporting platform; the dial indicator is fixed on the dial indicator seat, and the detection probes of the dial indicator are all pointed to the supporting table.

2. The servo valve torque motor armature magnetic conduction surface detection device as claimed in claim 1, wherein the cylindrical surfaces of the support platform large hole fixed column and the small hole fixed column are provided with angles inclining outwards from top to bottom towards the axis, and the inclination angle is 0.1-0.3 °.

3. The servo valve torque motor armature magnetically conducting surface detection device according to claim 1, wherein a rotation bearing is arranged between the bottom pillar and the support pillar of the support platform, and the support pillar can rotate around the bottom pillar of the support platform.

4. The servo valve torque motor armature magnetic conduction surface detection device according to claim 3, wherein the end of the support column of the support table is provided with four steps for positioning a rectangular body in the middle section of the armature, and the four positioning steps are distributed at four corners on the circular end surface of the support column; the distance between the left step and the right step is matched with the axial length of the rectangular body in the middle section of the armature; the distance between the front step and the rear step is matched with the diameter of the armature cylindrical rod.