Refining mill with magnetic telescopic actuator
By introducing a magnetic telescopic actuator and axial drive assembly into the fine grinding mill, combined with a displacement sensor and a PLC controller, precise control of the gap between the moving and stationary grinding discs was achieved, solving the problem of insufficient gap control precision in existing fine grinding mills.
Patent Information
- Application Number
- CN202423178960.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Existing precision grinding mills have a problem where the accuracy of adjusting the gap between the moving and stationary grinding discs cannot reach the set accuracy.
It employs a magnetic telescopic actuator and an axial drive assembly, and uses a displacement sensor and a PLC controller to adjust the gap between the moving and stationary grinding discs in real time, achieving precise adjustment by utilizing the extension and retraction of the magnetostrictive rod.
It enables rapid coarse adjustment and precise adjustment of the gap between the moving grinding disc and the stationary grinding disc, achieving the set accuracy and improving the precision of gap control.
Smart Images
Figure CN223732863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fine grinding machine technology, specifically to a fine grinding machine containing a magnetic telescopic actuator. Background Technology
[0002] In the operation of a fine grinding mill, the moving grinding discs must first be brought close to the stationary grinding discs using a transmission structure, and the gap between the moving and stationary grinding discs must be adjusted to reach the set gap. Then, the moving grinding discs are started to rotate, and with the assistance of the stationary grinding discs, friction and kneading work is performed on the material within the gap, thereby achieving the target performance. Precise control of the gap between the moving and stationary grinding discs is crucial. However, existing fine grinding mills often fail to achieve the required precision in adjusting the gap between the moving and stationary grinding discs. This is because the transmission structure used in existing fine grinding mills has gaps between each stage of the transmission pair, resulting in idle travel when the moving grinding discs are brought close to the stationary grinding discs, thus causing the gap control precision between the moving and stationary grinding discs to fall short of the set precision.
[0003] In summary, there is a need to provide a precision grinding machine with a magnetic telescopic actuator to solve the problem that the gap control accuracy between the moving and stationary grinding discs in existing precision grinding machines cannot reach the set accuracy. Utility Model Content
[0004] The purpose of this utility model is to provide a fine grinding machine containing a magnetic telescopic actuator, and the specific technical solution is as follows:
[0005] A precision grinding mill containing a magnetic telescopic actuator includes a stationary grinding disc, a moving grinding disc, a spindle assembly, a rotary drive component, an axial drive assembly, a displacement sensor, and a magnetic telescopic actuator;
[0006] The moving grinding disc and the stationary grinding disc are arranged facing each other, and the gap between them is adjustable; the spindle assembly includes a spindle body; the spindle body is located on the side of the moving grinding disc away from the stationary grinding disc, one end of which is connected to the moving grinding disc, and the other end is connected to the output end of the rotary drive.
[0007] The axial drive component is mounted on the spindle assembly and is used to drive the spindle assembly in conjunction with the spindle body to move the moving grinding disc axially closer to or further away from the stationary grinding disc.
[0008] One end of the magnetic telescopic actuator is rotatably plugged into the axial drive assembly, while the other end is connected to the spindle assembly;
[0009] The displacement sensor is mounted on the spindle assembly.
[0010] Optionally, the axial drive assembly includes an axial drive component and a transmission component; the axial drive component is disposed on the spindle assembly, and its output end is connected to the transmission component;
[0011] The transmission component includes a worm gear, a worm, and a lead screw; the worm gear is sleeved on the lead screw, and an internal thread is provided on the inner wall surface of the worm gear in contact with the lead screw, and an external thread adapted to the internal thread is provided on the outer wall surface of the lead screw in contact with the worm gear; the worm is meshed with the outer wall surface of the worm gear; the output end of the axial drive component is connected to the worm; the lead screw is connected to the spindle assembly through the magnetic telescopic actuator.
[0012] Optionally, the axial drive assembly further includes a reduction gear set disposed between the axial drive member and the worm gear.
[0013] Optionally, the reduction gear set includes multiple gear drive units arranged sequentially; each gear drive unit includes a gear shaft and a gear unit; the gear unit is disposed on the gear shaft; adjacent gear drive units are driven by meshing of the gear units; the output end of the axial drive unit is connected to the gear shaft of the first gear drive unit; the worm gear meshes with the gear unit of the last gear drive unit.
[0014] Optionally, the axial drive assembly further includes a coupling; the output end of the axial drive element is connected to the gear shaft via the coupling.
[0015] Optionally, the magnetic telescopic actuator includes a housing, an output rod, a preload spring, a magnetic core assembly, and a magnetostrictive rod; the magnetic core assembly is coaxially disposed within the housing, and includes a magnetic core cavity and an excitation coil disposed within the magnetic core cavity; the magnetostrictive rod is disposed within the magnetic core cavity, and the excitation coil is disposed on the outer periphery of the magnetostrictive rod, the excitation coil being connected to an AC power supply; one end of the output rod is disposed outside the housing and rotatably inserted into the lead screw, while the other end penetrates the housing and is connected to the magnetostrictive rod within the magnetic core cavity; the preload spring is sleeved on the output rod and is located between the inner wall of the housing and the outer wall of the magnetic core assembly.
[0016] Optionally, the magnetic core assembly includes an upper yoke, a lower yoke, a permanent magnet, a magnetic sleeve, and a coil frame; the magnetic sleeve is coaxially disposed within the housing; the upper yoke and the lower yoke are respectively disposed at both ends of the magnetic sleeve; the permanent magnet is disposed between the magnetic sleeve and the upper yoke, and between the magnetic sleeve and the lower yoke; the magnetic core cavity is formed by the magnetic sleeve, the upper yoke, the lower yoke, and the permanent magnet; the coil frame is disposed within the magnetic core cavity and coaxially disposed outside the magnetostrictive rod; the excitation coil is disposed on the coil frame.
[0017] Optionally, an anti-detachment plate is also provided on the output rod; the anti-detachment plate is located between the inner wall of the housing and the outer wall of the magnetic core assembly; the preload spring is disposed between the anti-detachment plate and the inner wall of the housing.
[0018] Optionally, the rotary drive component includes a motor; the axial drive component includes a motor.
[0019] Optionally, the precision grinding mill containing the magnetic telescopic actuator further includes a PLC controller; the PLC controller is connected to the rotary drive, the axial drive, the displacement sensor and the AC power supply.
[0020] The application of the technical solution of this utility model has at least the following beneficial effects:
[0021] This invention provides a precision grinding machine containing a magnetic telescopic actuator, which solves the problem in existing precision grinding machines where the gap adjustment accuracy between the moving and stationary grinding discs cannot reach the set precision. Specifically, before preparing for the precision grinding operation, this invention first uses the axial drive assembly to drive the spindle assembly in conjunction with the spindle body, causing the moving grinding disc to move axially closer to the stationary grinding disc, thereby achieving rapid coarse adjustment of the gap between the moving and stationary grinding discs. Secondly, the magnetic telescopic actuator drives the spindle assembly in conjunction with the spindle body to further move the moving grinding disc axially closer to the stationary grinding disc, achieving the set precision for the gap between the moving and stationary grinding discs.
[0022] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description
[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:
[0024] Figure 1 This is a schematic diagram of the structure of a fine grinding machine containing a magnetic telescopic actuator in one of the embodiments;
[0025] Figure 2 This is a schematic diagram of the transmission component in the embodiment;
[0026] Figure 3 This is a schematic diagram of the reduction gear set in the embodiment;
[0027] Figure 4 This is a cross-sectional structural diagram of the magnetic telescopic actuator in the embodiment;
[0028] Among them, 1. stationary grinding disc, 2. moving grinding disc, 3. spindle assembly, 3.1 spindle body, 4. rotary drive component, 5. axial drive assembly, 5.1 axial drive component, 5.2 transmission component, 5.2.1 worm gear, 5.2.2 lead screw, 5.3 reduction gear set, 5.3.1 gear shaft, 5.3.2 gear unit, 6. displacement sensor, 7. magnetic telescopic actuator, 7.1 housing, 7.2 output rod, 7.3 preload spring, 7.4 magnetostrictive rod, 7.5 upper yoke, 7.6 lower yoke, 7.7 permanent magnet, 7.8 magnetic sleeve, 7.9 coil frame, 7.10 excitation coil. Detailed Implementation
[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.
[0030] Example:
[0031] See Figures 1-4 A precision grinding machine containing a magnetic telescopic actuator includes a stationary grinding disc 1, a moving grinding disc 2, a spindle assembly 3, a rotary drive component 4, an axial drive assembly 5, a displacement sensor 6, and a magnetic telescopic actuator 7.
[0032] The moving grinding disc 2 and the stationary grinding disc 1 are arranged facing each other, and the gap between them is adjustable; the spindle assembly 3 includes a spindle body 3.1; the spindle body 3.1 is arranged on the side of the moving grinding disc 2 away from the stationary grinding disc 1, one end of which is connected to the moving grinding disc 2, and the other end is connected to the output end of the rotary drive 4.
[0033] The axial drive component 5 is disposed on the spindle assembly 3 and is used to drive the spindle assembly 3 in conjunction with the spindle body 3.1 to drive the moving grinding disc 2 to move axially closer to or away from the stationary grinding disc 1.
[0034] One end of the magnetic telescopic actuator 7 is rotatably plugged into the axial drive assembly 5, while the other end is connected to the spindle assembly 3;
[0035] The displacement sensor 6 is mounted on the spindle assembly 3.
[0036] See Figures 1-2 The axial drive assembly 5 includes an axial drive component 5.1 and a transmission component 5.2; the axial drive component 5.1 is disposed on the spindle assembly 3, and its output end is connected to the transmission component 5.2;
[0037] The transmission component 5.2 includes a worm gear, a worm 5.2.1, and a lead screw 5.2.2; the worm gear is sleeved on the lead screw 5.2.2, and an internal thread is provided on the inner wall surface of the worm gear in contact with the lead screw 5.2.2, and an external thread adapted to the internal thread is provided on the outer wall surface of the lead screw 5.2.2 in contact with the worm gear; the worm 5.2.1 is meshed with the outer wall surface of the worm gear; the output end of the axial drive component 5.1 is connected to the worm 5.2.1; the lead screw 5.2.2 is connected to the main shaft assembly 3 through the magnetic telescopic actuator 7.
[0038] See Figure 1 The axial drive assembly 5 further includes a reduction gear set 5.3 disposed between the axial drive member 5.1 and the worm gear 5.2.1.
[0039] See Figure 1 and Figure 3 The reduction gear set 5.3 includes multiple gear drive units arranged sequentially; each gear drive unit includes a gear shaft 5.3.1 and a gear unit 5.3.2; the gear unit 5.3.2 is mounted on the gear shaft 5.3.1; adjacent gear drive units are driven by meshing with the gear unit 5.3.2; the output end of the axial drive unit 5.1 is connected to the gear shaft 5.3.1 in the first gear drive unit; the worm gear 5.2.1 meshes with the gear unit 5.3.2 in the last gear drive unit.
[0040] The axial drive assembly 5 also includes a coupling; the output end of the axial drive component 5.1 is connected to the gear shaft 5.3.1 via the coupling.
[0041] See Figure 1 and Figure 4The magnetic telescopic actuator 7 includes a housing 7.1, an output rod 7.2, a preload spring 7.3, a magnetic core assembly, and a magnetostrictive rod 7.4 (the material can be either a metallic magnetostrictive material or a ferrite magnetostrictive material, specifically a rare-earth-iron alloy); the magnetic core assembly is coaxially disposed within the housing 7.1, and includes a magnetic core cavity and an excitation coil 7.10 disposed within the magnetic core cavity; the magnetostrictive rod 7.4 is disposed within the magnetic core cavity, and the excitation coil 7.10 is disposed on the outer periphery of the magnetostrictive rod 7.4. The excitation coil 7.10 is connected to an AC power supply; one end of the output rod 7.2 is disposed outside the housing 7.1 and is rotatably inserted into the lead screw 5.2.2, while the other end passes through the housing 7.1 and is connected to the magnetostrictive rod 7.4 inside the magnetic core cavity; the preload spring 7.3 is sleeved on the output rod 7.2 and is located between the inner wall of the housing 7.1 and the outer wall of the magnetic core assembly. The preload spring 7.3 is used to eliminate the gap caused by the extension or shortening of the magnetostrictive rod 7.4.
[0042] See Figure 4 The magnetic core assembly includes an upper yoke 7.5, a lower yoke 7.6, a permanent magnet 7.7, a magnetic sleeve 7.8, and a coil frame 7.9. The magnetic sleeve 7.8 is coaxially disposed within the housing 7.1. The upper yoke 7.5 and the lower yoke 7.6 are respectively disposed at both ends of the magnetic sleeve 7.8. The permanent magnet 7.7 is disposed between the magnetic sleeve 7.8 and the upper yoke 7.5, and between the magnetic sleeve 7.8 and the lower yoke 7.6. The magnetic core cavity is formed by the magnetic sleeve 7.8, the upper yoke 7.5, the lower yoke 7.6, and the permanent magnet 7.7. The magnetic core cavity can enhance the magnetic field strength generated by the excitation coil 7.10 and prevent the magnetic field from diffusing to the outside, thereby reducing magnetic energy loss. The coil frame 7.9 is disposed within the magnetic core cavity and coaxially disposed outside the magnetostrictive rod 7.4. The excitation coil 7.10 is disposed on the coil frame 7.9.
[0043] An anti-detachment plate is also provided on the output rod 7.2; the anti-detachment plate is located between the inner wall of the housing 7.1 and the outer wall of the magnetic core assembly to prevent the output rod 7.2 from detaching from the housing 7.1; the preload spring 7.3 is disposed between the anti-detachment plate and the inner wall of the housing 7.1.
[0044] The rotary drive component 4 is a motor; the axial drive component 5.1 is a servo motor.
[0045] The precision grinding machine containing a magnetic telescopic actuator also includes a PLC controller (not shown in the figure); the PLC controller is connected to the rotary drive 4, the axial drive 5.1, the displacement sensor 6 and the AC power supply.
[0046] The aforementioned fine grinding machine with a magnetic telescopic actuator can solve the problem of insufficient adjustment accuracy of the gap between the moving grinding disc 2 and the stationary grinding disc 1 in existing fine grinding machines. Specifically, before preparing for the fine grinding operation, the axial drive assembly 5 first drives the spindle assembly 3 in conjunction with the spindle body 3.1 to move the moving grinding disc 2 axially closer to the stationary grinding disc 1, achieving rapid coarse adjustment (≥0.3mm) of the gap between the moving grinding disc 2 and the stationary grinding disc 1; secondly, the magnetic telescopic actuator 7 drives the spindle assembly 3 in conjunction with the spindle body 3.1 to further move the moving grinding disc 2 axially closer to the stationary grinding disc 1, achieving the set accuracy (<0.3mm) of the gap between the moving grinding disc 2 and the stationary grinding disc 1.
[0047] The operating principle of the magnetic telescopic actuator 7 is as follows:
[0048] The displacement sensor 6 monitors and acquires the displacement data of the spindle assembly 3 in real time and transmits it to the PLC controller. The PLC controller adjusts the magnitude of the alternating current supplied to the excitation coil 7.10 according to the acquired displacement data, thereby generating a changing alternating magnetic field in the magnetic core cavity. The alternating magnetic field controls the extension and retraction length of the magnetostrictive rod 7.4, thereby driving the spindle assembly 3 to move the moving grinding plate 2 axially toward the stationary grinding plate 1 to a set gap, so as to achieve the set accuracy of the gap between the moving grinding plate 2 and the stationary grinding plate 1.
[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A refiner containing a magnetostrictive actuator, characterized in that, The static grinding piece (1), the dynamic grinding piece (2), the main shaft assembly (3), the rotary driving part (4), the axial driving assembly (5), the displacement sensor (6) and the magnetic telescopic actuator (7) are included. The dynamic grinding piece (2) is arranged opposite to the static grinding piece (1), and the gap between the two is adjustable. The axial driving assembly (5) is arranged on the main shaft assembly (3) and is used for driving the main shaft assembly (3) to drive the main shaft body (3.1) to drive the dynamic grinding piece (2) to axially approach or move away from the static grinding piece (1). One end of the magnetic telescopic actuator (7) is rotatably inserted into the axial driving assembly (5), and the other end is connected with the main shaft assembly (3). The displacement sensor (6) is arranged on the main shaft assembly (3).
2. A refiner containing a magnetostrictive actuator according to claim 1, characterized in that, The axial driving assembly (5) includes an axial driving part (5.1) and a transmission member (5.2). The transmission member (5.2) includes a worm wheel, a worm (5.2.1) and a screw rod (5.2.2).
3. A refiner containing a magnetostrictive actuator according to claim 2, characterized in that, The axial driving assembly (5) further includes a speed reduction gear set (5.3) arranged between the axial driving part (5.1) and the worm (5.2.1).
4. A refiner containing a magnetostrictive actuator according to claim 3, characterized in that, The speed reduction gear set (5.3) includes a plurality of gear driving units arranged in sequence.
5. A refiner containing a magnetostrictive actuator according to claim 4, characterized in that, The axial driving part (5.1) is connected with the gear shaft (5.3.1) in the first gear driving unit. The worm (5.2.1) is engaged with the gear body (5.3.2) in the last gear driving unit. The axial driving assembly (5) further includes a coupling. The output end of the axial driving part (5.1) is connected with the gear shaft (5.3.1) through the coupling.
6. A refiner containing a magnetostrictive actuator according to any one of claims 2-5, characterized in that, The magnetic retraction actuator (7) comprises a shell (7.1), an output rod (7.2), a pre-tightening spring (7.3), a magnetic core assembly and a magnetostrictive rod (7.4); the magnetic core assembly is coaxially arranged in the shell (7.1) and comprises a magnetic core cavity and an excitation coil (7.10) arranged in the magnetic core cavity; the magnetostrictive rod (7.4) is arranged in the magnetic core cavity, the excitation coil (7.10) is arranged on the outer periphery of the magnetostrictive rod (7.4), and the excitation coil (7.10) is connected with an alternating current power supply; one end of the output rod (7.2) is arranged outside the shell (7.1) and rotatably inserted with the screw rod (5.2.2), and the other end penetrates through the shell (7.1) and is connected with the magnetostrictive rod (7.4) in the magnetic core cavity; the pre-tightening spring (7.3) is sleeved on the output rod (7.2) and located between the inner wall of the shell (7.1) and the outer wall of the magnetic core assembly.
7. A refiner containing a magnetostrictive actuator according to claim 6, characterized in that, The magnetic core assembly comprises an upper magnetic yoke (7.5), a lower magnetic yoke (7.6), a permanent magnet (7.7), a magnetic conducting sleeve (7.8) and a coil former (7.9); the magnetic conducting sleeve (7.8) is coaxially arranged in the shell (7.1); the upper magnetic yoke (7.5) and the lower magnetic yoke (7.6) are respectively arranged at two ends of the magnetic conducting sleeve (7.8); the permanent magnet (7.7) is arranged between the magnetic conducting sleeve (7.8) and the upper magnetic yoke (7.5) and between the magnetic conducting sleeve (7.8) and the lower magnetic yoke (7.6); the magnetic core cavity is formed by the magnetic conducting sleeve (7.8), the upper magnetic yoke (7.5), the lower magnetic yoke (7.6) and the permanent magnet (7.7); the coil former (7.9) is arranged in the magnetic core cavity and coaxially arranged outside the magnetostrictive rod (7.4); the excitation coil (7.10) is arranged on the coil former (7.9).
8. The refiner containing a magnetostrictive actuator according to claim 6, characterized in that, An anti-disengagement plate is further arranged on the output rod (7.2); the anti-disengagement plate is located between the inner wall of the shell (7.1) and the outer wall of the magnetic core assembly; the pre-tightening spring (7.3) is arranged between the anti-disengagement plate and the inner wall of the shell (7.1).
9. The refiner containing magnetostrictive actuator according to claim 6, characterized in that, The rotary driving member (4) comprises an electric motor; the axial driving member (5.1) comprises an electric motor.
10. The refiner containing magnetostrictive actuator according to claim 6, characterized in that, A PLC controller is further included; the PLC controller is connected with the rotary driving member (4), the axial driving member (5.1), the displacement sensor (6) and the alternating current power supply.