Permanent magnet synchronous variable-frequency coal mining machine roller
By utilizing the variable frequency speed control function of the permanent magnet synchronous variable frequency coal mining machine drum, the problem of the existing coal mining machine drum being unable to protect the cutting teeth under power frequency conditions has been solved, achieving reduced speed and increased torque in hard rock formations and optimal energy-saving operation under different load conditions.
Patent Information
- Application Number
- CN202520773547.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-23
AI Technical Summary
The existing coal mining machine drum operates at a constant speed under power frequency conditions. It cannot reduce the speed and increase the torque when encountering hard rock strata, cannot protect the cutting teeth from damage, and cannot maintain the best energy-saving operation under different load conditions.
The permanent magnet synchronous variable frequency coal mining machine drum is adopted. The speed and torque are controlled by the variable frequency system. The rotor and stator are made of permanent magnet material to realize the variable frequency speed regulation function, protect the cutting teeth and maintain the best energy-saving state under different load conditions.
When encountering hard rock formations, it can reduce speed and increase torque, protect the cutting teeth from damage, and maintain optimal energy-saving operation under different load conditions, thus having good market development prospects.
Smart Images
Figure CN223854235U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to coal mine underground equipment technical field, concretely relates to a permanent magnet synchronous frequency conversion coal winning machine drum. BACKGROUND
[0002] The drum-type coal winning machine is a coal winning machine for breaking coal with a drum, and is the most widely used coal winning machine at present. The drum of the coal winning machine mainly comprises a cylinder, helical blades and picks. The helical blades are welded to the outside of the cylinder, and the picks cut coal, and the helical blades guide or load the cut coal. However, the existing coal winning machine drum has a constant rotating speed in a power frequency state, and cannot increase torque by reducing the rotating speed when hard rock layers are encountered, cannot protect the picks from being damaged by setting a torque limit, and cannot keep the best energy-saving state in different load conditions. SUMMARY
[0003] The utility model discloses a permanent magnet synchronous frequency conversion coal winning machine drum to solve the defects of the existing coal winning machine drum in a power frequency state.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a permanent magnet synchronous frequency conversion coal winning machine drum, comprising a coal winning machine body, a rocker arm, a rotating shaft, a cylinder, a fixed shaft, a stator, a magnetic pole coil, a rotor, a stator slot, a rotor slot, a coil tap and a frequency conversion system, characterized in that: the coal winning machine body is rotatably connected to one end of the rocker arm through the rotating shaft, the other end of the rocker arm is fixedly connected to one end of the stator, a stator slot is arranged at the other end of the stator, the magnetic pole coil is wound on the stator, the rotor is a semi-open type, one end face is in an open state, and the other end face is in a semi-closed state, a rotor slot is arranged at the center position of the semi-closed end face, the rotor is buckled outside the stator, and the rotor slot and the stator slot are rotatably connected, so that the inner surface of the rotor can rotate around the outer surface of the stator, and the magnetic pole coil is connected to the frequency conversion system through the coil tap.
[0005] Preferably, the rotor is made of permanent magnet material.
[0006] Preferably, the working principle of the frequency conversion system is consistent with that of the existing frequency converter.
[0007] Preferably, the working principles of the stator and the rotor are consistent with that of the existing three-phase asynchronous motor.
[0008] The utility model has the advantages that: the utility model has the frequency conversion speed regulation function, can increase torque by reducing the rotating speed when hard rock layers are encountered, can protect the picks from being damaged by setting a torque limit, can keep the best energy-saving state in different load conditions, and has a good market development prospect. BRIEF DESCRIPTION OF DRAWINGS
[0009] Figure 1 It is the coal winning machine body structure schematic view of the utility model;
[0010] Figure 2 It is the cylinder structure schematic view of the utility model;
[0011] Figure 3 It is the rotor structure schematic view of the utility model;
[0012] Figure 4 It is the relative position schematic view of the stator and the magnetic pole coil of the utility model;
[0013] Figure 5 It is the relative position schematic view of the stator and the stator slot of the utility model;
[0014] Figure 6 It is the stator structure schematic view of the utility model;
[0015] Figure 7 It is the magnetic pole coil structure schematic view of the utility model.
[0016] In the figure, 101-coal winning machine body, 102-rocker arm, 103-travel gear, 104-wiring cavity, 105-rotating shaft, 201-cylinder, 202-fixed shaft, 203-stator, 204-magnetic pole coil, 205-rotor, 206-cutting part, 207-cutter pick, 208-stator slot, 209-rotor slot, 210-coil tap, 301-control system, 302-variable frequency system. DETAILED DESCRIPTION
[0017] The embodiments of the present patent are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present patent, and cannot be understood as a limitation of the present patent.
[0018] Please refer to Figure 1 , which is the coal winning machine body structure schematic view of the utility model, similar to the structure of the existing fully mechanized coal mining face coal winning machine, the difference lies in the control system, the original power frequency drive is replaced by variable frequency drive.
[0019] Please refer to Figures 2-7The drawing is the key component structure enlarged view of the utility model, can clearly see the relative position and working principle of each component, including coal winning machine body 101, rocker arm 102, pivot 105, barrel 201, fixed shaft 202, stator 203, magnetic pole coil 204, rotor 205, stator slot 208, rotor slot 209, coil tap 210, frequency conversion system 302, its characterized in that: coal winning machine body 101 is connected with one end of rocker arm 102 through pivot 105, the other end of rocker arm 102 is fixedly connected with one end of stator 203, stator slot 208 is arranged at the other end of stator 203, magnetic pole coil 204 is wound on stator 203, rotor 205 is half open type, one end face is open state, and the other end face is half closed state, rotor slot 209 is formed in the center position of the half closed state end face, rotor 205 is buckled on the outside of stator 203, and is rotatably connected through stator slot 208 and rotor slot 209, so that the inner surface of rotor 205 can rotate around the outer surface of stator 203, magnetic pole coil 204 is connected with frequency conversion system 302 through coil tap 210, and the rotor is made of permanent magnetic material.
[0020] The working principle of frequency conversion system 302 is consistent with that of the existing frequency converter, and the working principle of barrel 201 is consistent with that of the existing three-phase asynchronous motor.
[0021] When in use, the rotational speed and torque of barrel 201 can be controlled by setting frequency conversion system 302 to achieve the best working state.
[0022] In the description of the patent, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the patent.
[0023] In the description of the patent, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set. For ordinary skilled in the art, the specific meaning of the above terms in the patent can be understood according to the specific circumstances.
Claims
1. A permanent magnet synchronous variable frequency coal mining machine drum, comprising a coal mining machine body (101), a rocker arm (102), a rotating shaft (105), a drum body (201), a fixed shaft (202), a stator (203), a magnetic pole coil (204), a rotor (205), a stator slot (208), a rotor slot (209), a coil tap (210), and a variable frequency system (302), characterized in that: The coal mining machine body (101) is rotatably connected with one end of the rocker arm (102) through the rotating shaft (105), the other end of the rocker arm (102) is fixedly connected with one end of the stator (203), the stator slot (208) is arranged at the other end of the stator (203), the magnetic pole coil (204) is wound on the stator (203), the rotor (205) is a semi-open type, one end face is in an open state, and the other end face is in a semi-closed state, the rotor slot (209) is arranged at the center position of the semi-closed end face, the rotor (205) is buckled outside the stator (203), and the rotating connection of the stator slot (208) and the rotor slot (209) can realize that the inner surface of the rotor (205) rotates around the outer surface of the stator (203), and the magnetic pole coil (204) is connected with the frequency conversion system (302) through the coil tap (210).
2. A permanent magnet synchronous variable frequency shearer drum as claimed in claim 1, characterized in that: The rotor (205) is made of a permanent magnetic material.