CN116274901A - Vibration unit based on electromagnetic drive and leaf spring guide - Google Patents

Abstract

The invention belongs to the technical field of metallurgical continuous casting equipment, and discloses a vibrating unit based on electromagnetic driving and leaf spring guiding, which comprises a fixed table, a vibrating table, a guide leaf spring device, a displacement sensor and a control system, wherein the displacement sensor is used for detecting the relative position between the fixed table and the vibrating table, the fixed table is of a box frame structure, the vibrating table is of a T-shaped frame structure, the fixed table is connected with the vibrating table through four groups of guide leaf spring devices, a stator is arranged on the fixed table, a rotor is arranged on the vibrating table, the displacement sensor is connected with the control system, and the control system adjusts exciting current according to the feedback result of the displacement sensor to realize vibration control of the vibrating table. The invention combines electromagnetic force drive and leaf spring guide, thoroughly solves the abrasion problem of a plurality of vibration units in the current mainstream in the use process, has no maintenance, long service life, no need of other energy media and matched pipelines, no pollution, simple wiring and adaptability to complex environments such as high temperature, high humidity and the like in the production operation.

Description

Vibration unit based on electromagnetic drive and leaf spring guide

Technical Field

The invention belongs to the technical field of metallurgical continuous casting equipment, and particularly relates to a vibration unit based on electromagnetic driving and leaf spring guiding.

Background

The vibration unit is applied to the continuous casting field, and has the function of enabling the crystallizer to precisely vibrate according to set waveforms, amplitudes and vibration frequencies, and the purpose of demolding the inner wall of the copper plate of the crystallizer and the newly generated casting blank shell is achieved. The existing vibration units are mainly divided into three modes of hydraulic cylinder driving, electric cylinder driving and cam driving according to driving modes: the hydraulic cylinder is driven by the hydraulic cylinder to generate vibration, and is characterized by bearing large load and small abrasion, and the vibration frequency and amplitude can be adjusted at any time; the electric cylinder drive is driven by an electric cylinder to generate vibration, the interior of the electric cylinder is composed of a drive motor and a screw rod system, the reciprocating rotation of the motor is converted into the reciprocating motion of the screw rod, the vibration frequency amplitude can be adjusted at any time, and the abrasion is larger; the cam drive drives the driven mechanism to do reciprocating motion through the rotation of the cam, and is characterized by simple structure, low cost, easy abrasion and on-line adjustment of amplitude. The vibration unit is mainly provided with a guide wheel guide and a plate spring guide according to a guide mode, and the guide wheel guide limits the deflection of vibration in the horizontal direction through at least four groups of guide wheels and guide plate pairs, and has the defect that the guide wheels and the guide plates are easy to wear and lose guide precision; the plate spring guide is fixedly connected with the vibrating table through a plurality of groups of spring plates, and the vibrating table is limited to vibrate in the direction perpendicular to the guide plate. Currently, the most mainstream application is a split hydraulic cylinder driven leaf spring guided vibration unit.

Compared with the driving of an electric cylinder and an eccentric wheel, the driving energy of the hydraulic cylinder bears larger load and has small abrasion, but due to the matching relation between the piston rod and the inner wall of the cylinder body, a small amount of abrasion still exists when the piston rod reciprocates relative to the inner wall of the cylinder body. In continuous casting production, the vibration unit always vibrates according to a set vibration curve, the vibration frequency is generally set to 120-300 times/min, the abrasion of the hydraulic cylinder can be gradually accumulated under the uninterrupted high-frequency vibration, and finally the hydraulic cylinder cannot be normally used due to serious abrasion, so that the normal production rhythm is influenced. The hydraulic cylinder is required to be provided with an independent hydraulic station and is connected with a hydraulic pipeline, and the hydraulic station is provided with a valve, an energy accumulator and the like to form a whole hydraulic system, so that the construction and maintenance cost is high.

Disclosure of Invention

In view of the foregoing drawbacks of the prior art, an object of the present invention is to provide a vibration unit based on electromagnetic driving and leaf spring guiding.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a vibrating unit based on electromagnetic drive and leaf spring direction, includes fixed station, shaking table, direction leaf spring device, is used for detecting the displacement sensor and the control system of the relative position between fixed station and the shaking table, the fixed station is box frame structure, and four angle departments of frame structure upper portion and lower part respectively have four direction leaf spring device installation faces, the shaking table is T frame structure, and the lower half of T frame structure is in the inner chamber of fixed station box, and two sets of direction leaf spring devices are respectively installed to upper portion and the lower part of fixed station, and the installation direction of direction leaf spring device is parallel to the horizontal part of T frame structure, and two direction leaf spring device installation faces all outwards extend the upper portion of the vertical part of T frame structure and the both sides of lower part are connected with four sets of direction leaf spring device middle part respectively, the stator is installed to the fixed station, the shaking table installs the active cell, displacement sensor connects control system, and control system adjusts exciting current according to the result that displacement sensor fed back for the shaking table can vibrate for the fixed station according to the waveform that sets for shaking table is vibrated.

Further, a limiting device is arranged between the fixed table and the vibrating table and comprises an upper base plate, a lower base plate and an adjusting gasket, the upper base plate is connected with the vibrating table, the adjusting gasket is connected with the fixed table, the upper base plate is opposite to and parallel to the surface of the lower base plate, and the adjusting gasket is arranged between the lower base plate and the fixed table.

Further, the stator is arranged at the bottom center of the inner cavity of the fixed table, and the rotor is arranged at the bottom center of the vibrating table.

Further, the four upper guide plate spring device mounting surfaces of the box-shaped frame structure are horizontal and coplanar, the four lower guide plate spring device mounting surfaces of the box-shaped frame structure are horizontal and coplanar, each mounting surface is provided with a pin hole and a bolt hole, and the mounting surfaces and the pin holes corresponding to the upper part and the lower part are completely overlapped in the vertical direction.

Further, two mounting surfaces of the upper part of the vertical part of the T-shaped frame structure are horizontal and coplanar, two mounting surfaces of the lower part of the vertical part of the T-shaped frame structure are horizontal and coplanar, a pin hole and a bolt hole are designed on each mounting surface, and the mounting surfaces and the pin holes corresponding to the upper part and the lower part of the vertical part of the T-shaped frame structure are completely overlapped in the vertical direction.

Further, a water pipe and an expansion joint for supplying water to the crystallizer are arranged in the fixed table; the two ends of the horizontal part of the vibrating table are provided with movable joint bolts for installing the crystallizer, and the middle part of the vibrating table is provided with a water pipe which penetrates through the movable joint bolts for supplying water to the crystallizer.

Further, the guide plate spring device comprises one or more than two superimposed strip-shaped spring steel plates, and pressing plates are arranged at the middle part and the two ends of each spring steel plate.

Further, pin holes and bolt holes are designed at the two ends and the middle part of the spring steel plate, and pin holes and bolt holes are designed at the same positions of the pressing plates arranged at the middle part and the two ends of the spring steel plate.

Further, the motor also comprises a power supply for providing power for the stator, the rotor, the control system and the displacement sensor.

Furthermore, when the vibration unit based on electromagnetic driving and leaf spring guiding is used, a vibration displacement set value is input to the control system, the control system is in feedback superposition with a displacement signal measured by the displacement sensor according to the set value to serve as input of closed loop control, then required exciting current is calculated according to the control system, the exciting current is output to exciting coils in the stator and the rotor, and electromagnetic force between the stator and the rotor enables the vibration table to generate motion and displacement, so that vibration control of the vibration table is realized.

Compared with the prior art, the invention has the following beneficial effects: the invention combines electromagnetic force drive and leaf spring guide, thoroughly solves the abrasion problem of a plurality of vibration units in the current mainstream in the use process, has no maintenance, long service life, no need of other energy media and matched pipelines, no pollution, simple wiring and adaptability to complex environments such as high temperature, high humidity and the like in the production operation.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, given with reference to the accompanying drawings in which:

FIG. 1 is a diagram of a vibration region arrangement;

FIG. 2 is a view of vibration area A;

fig. 3 is a schematic diagram of a structure of a vibration unit based on electromagnetic force driving and leaf spring guiding;

fig. 4 is a cross-sectional view of a vibration unit based on electromagnetic force driving and leaf spring guiding;

FIG. 5 is a schematic view of a structure of a stationary table;

FIG. 6 is a schematic diagram of a vibrating table structure;

FIG. 7 is a schematic view of a guide leaf spring assembly;

FIG. 8 is a schematic diagram of a stator and mover structure;

FIG. 9 is a schematic structural view of a fixing pin;

FIG. 10 is a schematic diagram of a positioning device;

FIG. 11 is a schematic diagram of a displacement sensor;

fig. 12 is a control schematic.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications could be made by those skilled in the art without departing from the inventive concept. These are all within the scope of the present invention.

The working position of the vibration unit is shown in fig. 1-2, and the online equipment of the slab continuous casting machine is mainly divided into a platform area, a vibration area, a main machine area and a blank ejection area, wherein the vibration area consists of a crystallizer (a), a crystallizer cover (b), a vibration unit (c), a supporting guide section (d) and the like. The main function of the crystallizer (a) is to provide a cooling cavity for newly injected molten steel, so that the molten steel is primarily solidified to generate a blank shell with a certain thickness. The support crystallizer (a) is a vibrating unit (c), two vibrating units (c) are arranged below each crystallizer, the vibrating units (c) are vibration generating devices, each vibrating unit can independently generate vibration in the vertical direction, and when the continuous casting machine works, the two vibrating units (c) under the same crystallizer (a) vibrate synchronously, so that the crystallizer (a) vibrates stably up and down according to a set vibration model, the demolding of the inner cavity of the crystallizer (a) and the primary blank shell is smoothly completed, and continuous casting is realized.

The vibration unit based on electromagnetic driving and leaf spring guiding comprises a fixed table and a vibration table, wherein the fixed table is relatively fixed and connected with a foundation, the vibration table is connected with the fixed table through a guide leaf spring device, and the guide leaf spring device enables the vibration table and the fixed table to relatively move in a straight line in a fixed direction and plays a role in guiding the vibration table; the stator and the rotor are used in a matched mode, the stator and the rotor are respectively fixed on the fixed table and the vibrating table, exciting coils are arranged in the stator and the rotor, electromagnetic force is generated between the stator and the rotor through exciting current, and the vibrating table is forced to vibrate. The relative position between the fixed table and the vibrating table is detected by a displacement sensor, and the control system adjusts exciting current according to the feedback detection result, so that the vibrating table can vibrate relative to the fixed table according to set waveforms, amplitudes and vibration frequencies.

Specifically, referring to fig. 3 to 4, the vibration unit based on electromagnetic driving and leaf spring guiding includes the following main components: the vibration table comprises a fixed table 1, a vibration table 2, a guide plate spring device 3, a stator 4, a rotor 5, a fixed pin 6, a limiting device 7, a displacement sensor 8, a control system 9, a power supply 10 and a cable 11.

As shown in fig. 5, the fixing table is a box-shaped frame structure formed by welding steel plates, four mounting surfaces of the guide plate spring device 3 are arranged at four corners of the upper part of the frame, the four mounting surfaces are horizontal and coplanar, and each mounting surface is provided with a pin hole and a bolt hole; the lower part of the frame is provided with four identical installation surfaces of the guide plate spring device 3, and each installation surface is provided with a pin hole and a bolt hole; the mounting surfaces of the upper part and the lower part and the pin holes are completely overlapped in the vertical direction; the center of the bottom of the inner cavity of the fixed table is provided with a stator 3 installation position, and the inside of the fixed table 1 is provided with a water pipe and an expansion joint for supplying water to the crystallizer.

As shown in fig. 6, the vibration table is a T-shaped frame structure formed by welding steel plates, two mounting surfaces of the guide plate spring device 3 extend outwards from the middle of the upper part of the frame, the two mounting surfaces are horizontal and coplanar, and each mounting surface is provided with a pin hole and a bolt hole; the lower part of the frame is provided with two identical installation surfaces of the guide plate spring device 3, and each installation surface is provided with a pin hole and a bolt hole; the mounting surfaces and the pin holes of the upper part and the lower part are completely overlapped in the vertical direction; the center of the bottom of the vibrating table 2 is provided with a rotor 5 installation position; the two ends of the top of the vibrating table 2 are provided with movable joint bolts for installing the crystallizer, and the middle is provided with a water pipe which penetrates through the movable joint bolts for supplying water to the crystallizer. The lower half part of the T-shaped structure of the vibrating table 2 is positioned in the inner cavity of the box body of the fixed table 1.

As shown in fig. 7, the guide leaf spring device comprises one or more than two superimposed strip-shaped spring steel plates, a middle pressing plate and two end pressing plates, wherein the middle pressing plate is combined with the middle part of the spring steel plates, the two end pressing plates are combined with the two ends of the spring steel plates, pin holes and bolt holes are designed at the two ends and the middle part of the spring steel plates, and the pin holes and the bolt holes are designed at the same positions as the middle pressing plate and the two end pressing plates which are combined with the middle pressing plate. Four sets of guide leaf spring devices 3 are arranged on both sides of the vibrating unit, two sets up and down. The fixed table 1 is connected with both ends of the four sets of guide leaf spring devices 3 through fixing pins 6, and is combined on eight mounting surfaces of the fixed table 1 through bolts, and the vibrating table 2 is connected with the middle parts of the four sets of guide leaf spring devices 3 through the fixing pins 6 and is combined on four mounting surfaces of the fixed table through bolts. The fixed table 1 and the vibrating table 2 are connected through four groups of guide plate spring devices.

As shown in fig. 8, the stator 4 and the mover 5 are each composed of an exciting coil, a magnetic core and a protective shell, and a set exciting current is input to generate a corresponding acting force between the stator and the mover. The stator 4 is fixedly connected to the center of the bottom of the inner cavity of the fixed table 1, and the rotor 5 is fixedly connected to the center of the bottom of the vibrating table 2. The stator 4 and the rotor 5 are opposite, and the acting surface keeps a certain distance, and the distance is larger than the distance between the upper backing plate and the lower backing plate of the limiting device, so that the rotor and the stator are prevented from collision during vibration.

As shown in fig. 9, the securing pin is a cylindrical pin or a spring pin, standard purchase or non-standard customization.

As shown in fig. 10, a limiting device 7 is installed between the fixed table and the vibrating table, the limiting device comprises an upper base plate 12, a lower base plate 13 and an adjusting gasket 14, the upper base plate is connected with the vibrating table 2, the adjusting gasket is connected with the fixed table 1, the upper base plate is opposite to and parallel to the surface of the lower base plate, and the adjusting gasket is arranged between the lower base plate and the fixed table. The distance between the upper base plate and the lower base plate is adjusted to 9-15 mm through the adjusting gasket, and in the whole stroke of the vibrating table, when the upper base plate and the lower base plate are in surface contact, the vibrating table is limited downwards, namely the vibrating table falls to the lowest position.

As shown in fig. 11, the displacement sensor 8 is paired with a magnetic ring and a sensor probe. The magnetic ring is connected with the vibrating table 2, and the probe part is connected with the fixed table 1.

The power supply 10 provides power for the stator 4, the rotor 5, the control system 9, the displacement sensor 8 and the like.

The cable 11 includes a signal cable and a power cable.

The working principle of the invention is as follows: as shown in fig. 3 to 4. The fixed stage of the vibration unit is mounted on the support base and is a support fixing portion of the vibration unit. The stator is fixedly connected with the center of the bottom of the inner cavity of the fixed table, and the rotor is fixedly connected with the center of the bottom of the vibrating table. The stator and the rotor are matched for use, exciting coils are arranged in the stator and are electrified with set current, electromagnetic force is generated between the rotor and the stator, the rotor and the vibrating table are driven to vibrate, and the vibrating table is a movable part of the vibrating unit. The electromagnetic force generated by the cooperation of the stator and the mover is the driving force for the vibration of the vibration unit.

The guide leaf spring means is an elastic element which can be elastically bent and deformed within a certain range. The fixed table is connected with the vibrating table through four groups of guide plate spring devices, so that the vibrating table is limited to move in the vertical direction and not to swing in the horizontal direction. The guiding leaf spring device plays a guiding role.

The limiting device is arranged between the fixed table and the vibrating table, plays a role of mechanical limiting, and prevents equipment from being damaged due to overlarge amplitude. The maximum distance between the upper and lower base plates of the limiting device is the maximum amplitude that can be achieved by the vibration unit.

The displacement sensor is arranged between the fixed table and the vibrating table, and can measure the relative displacement of the fixed table and the vibrating table in real time. As shown in fig. 12, a vibration displacement set value is input to the control system, the control system is in feedback superposition with a displacement signal measured by the displacement sensor according to the set value, the vibration displacement set value is used as input of closed loop control, then required exciting current is calculated according to the controller, the exciting current is output to the exciting coil, and electromagnetic force between the stator and the rotor enables the vibration table to generate motion and displacement, so that vibration control of the vibration table is realized.

The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.

Claims (10)

1. The utility model provides a vibrating unit based on electromagnetic drive and leaf spring direction, its characterized in that includes fixed station, shaking table, direction leaf spring device, is used for detecting the displacement sensor and the control system of the relative position between fixed station and the shaking table, the fixed station is box frame structure, and four angle departments of frame structure upper portion and lower part respectively have four direction leaf spring device installation faces, the shaking table is T type frame structure, and the lower half of T type frame structure is in the inner chamber of fixed station box, and two sets of direction leaf spring devices are respectively installed to upper portion and the lower part of fixed station, and the installation direction of direction leaf spring device is parallel to the horizontal part of T type frame structure, and two direction leaf spring device installation faces are all outwards extended to the both sides of the vertical part of T type frame structure are connected with four sets of direction leaf spring device middle part respectively, the stator is installed to the fixed station, the shaking table is installed the active cell, displacement sensor connection control system, control system adjusts excitation current according to the result of displacement sensor feedback, realizes the control to shaking table vibration.

2. The vibration unit based on electromagnetic driving and leaf spring guiding according to claim 1, wherein a limiting device is installed between the fixed table and the vibration table, the limiting device comprises an upper base plate, a lower base plate and an adjusting gasket, the upper base plate is connected with the vibration table, the adjusting gasket is connected with the fixed table, the upper base plate is opposite to and parallel to the lower base plate, and the adjusting gasket is arranged between the lower base plate and the fixed table.

3. The vibration unit based on electromagnetic driving and leaf spring guiding according to claim 1, wherein the stator is arranged at the bottom center of the cavity of the fixed table, and the mover is arranged at the bottom center of the vibration table.

4. The vibration unit based on electromagnetic driving and plate spring guiding according to claim 1, wherein the upper four guide plate spring device mounting surfaces of the box-shaped frame structure are horizontal and coplanar, the lower four guide plate spring device mounting surfaces are horizontal and coplanar, each mounting surface is provided with a pin hole and a bolt hole, and the mounting surfaces and the pin holes corresponding to the upper and lower parts are completely overlapped in the vertical direction.

5. The vibration unit based on electromagnetic driving and leaf spring guiding according to claim 1, wherein the two mounting surfaces of the upper part of the vertical part of the T-shaped frame structure are horizontal and coplanar, the two mounting surfaces of the lower part are horizontal and coplanar, each mounting surface is designed with a pin hole and a bolt hole, and the corresponding mounting surfaces and pin holes of the upper part and the lower part of the vertical part of the T-shaped frame structure are completely overlapped in the vertical direction.

6. The vibration unit based on electromagnetic driving and leaf spring guiding according to claim 1, wherein a water pipe and an expansion joint for supplying water to the crystallizer are arranged inside the fixed table; the two ends of the horizontal part of the vibrating table are provided with movable joint bolts for installing the crystallizer, and the middle part of the vibrating table is provided with a water pipe which penetrates through the movable joint bolts for supplying water to the crystallizer.

7. The vibration unit based on electromagnetic driving and leaf spring guiding according to claim 1, wherein the guiding leaf spring means comprises one or more superimposed elongated spring steel plates, the spring steel plates being provided with pressure plates in the middle and at both ends.

8. The vibration unit according to claim 7, wherein pin holes and bolt holes are formed at both ends and the middle of the spring steel plate, and pin holes and bolt holes are formed at the same positions of the pressing plates provided at the middle and both ends of the spring steel plate.

9. The vibration unit according to claim 1, further comprising a power source for providing power to the stator and mover, the control system and the displacement sensor.

10. The vibration unit according to any one of claims 1 to 9, wherein a vibration displacement set value is input to the control system in use, the control system is superimposed with a displacement signal feedback measured by the displacement sensor according to the set value, and the control system calculates a required exciting current according to the control system, and outputs the exciting current to exciting coils in the stator and the mover, and electromagnetic force between the stator and the mover causes the vibration table to move and displace, thereby realizing vibration control of the vibration table.

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