Energy-saving electric roller

Abstract

The energy-saving electric roller is composed of a roller body, a magnetic isolation sleeve, rotor cores, stator cores, a fixing shaft, a left motor, a middle motor and a right motor, the inner diameters and the outer diameters of the rotor cores and the stator cores of the left motor, the middle motor and the right motor and coil grooves and small grooves are consistent, the number of winding turns of coils is the same, the winding direction is the same, and the rotating speed is the same. And the optimal energy-saving effect is achieved by adjusting the power-on operation combination of the motor at any time, and the motor is widely applied to departments such as mines, metallurgy, chemical engineering, coal, building materials, electric power, grain and transportation.

Description

Technical Field

[0001] The invention belongs to the transmission category and relates to the technical field of electric rollers, and specifically to an energy-saving electric roller. Background Art

[0002] Fixed and mobile belt conveyors replace traditional motors, and the reducer is a separate drive device outside the driving roller. The electric roller has many advantages such as compact structure, high transmission efficiency, low noise, good sealing, small space, easy installation, etc., and is suitable for working in various harsh environmental conditions. Generally, a power mechanism composed of an electric motor and a reducer is used. The motor is used as the original power, and the roller body is driven to rotate after being reduced by the reducer. Under this type of reduction transmission structure, the reducer needs lubricating oil to operate, but the lubricating oil is a test for the insulation performance of the motor, which increases the requirements for the safety protection level of the motor and increases safety hazards in practical applications; secondly, when the electric roller is actually running, the lubricating oil is on the inner wall of the roller under the action of centrifugal force, which makes it difficult to lubricate the reducer, and the oil leakage problem is also unavoidable, thus affecting the performance of the whole machine. In addition, due to different material transportation volumes, the output torque required by the electric roller is also different, but the required transmission speed remains unchanged. The torque output of the traditional electric roller at the same speed is the same, resulting in power loss under low load. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an energy-saving electric drum which can adjust the torque output according to different load states, and is composed of a drum body, a magnetic isolation sleeve, a rotor core, a stator core, a fixed shaft, a left motor, a middle motor, and a right motor. The characteristics are as follows: the drum body is a cylindrical structure, the middle motor is installed in the middle position inside, the left motor is installed on the left side inside, and the right motor is installed on the right side inside. The magnetic isolation sleeve is embedded between the left motor, the middle motor, the right motor and the drum body. Each motor is composed of a rotor core, a stator core, a fixed shaft and a stator coil. The rotor core is connected to the magnetic isolation sleeve on the outside, and is inside a stator core. The stator core is fixed on the fixed shaft, and a stator coil is also wound on the stator core. A uniform air gap is provided between the outer surface of the stator core and the inner surface of the rotor core. The stator core includes winding package slots and small slots, the winding package slots and the small slots have the same number of slots, the small slots are distributed in the middle position of the top of each tooth of the stator core, the ratio of the number of slots of the winding package slots to the number of poles of the rotor is (2p±1) / 3:2p, wherein p is the number of pole pairs of the motor, the number of pole pairs of the motor is 3 times the winding package slots±1, and the number of pole pairs of the motor is an even number; the number of the winding package slots is an odd multiple of 3, the groove shape of each winding package slot is consistent, and they are evenly distributed at equal distances, and the stator winding package is wound in the winding package slot; the groove shape of the small slot is an arc-shaped groove.

[0004] The inner surface of the rotor core is provided with a plurality of dovetail-shaped notches, and tile-shaped permanent magnets are embedded in the notches.

[0005] The fixed shaft is made of thick-walled seamless steel pipe, a stator core heat exchange tube is installed in the bottom of the stator core magnetic pole, a wire wrap slot heat exchange tube is provided at the bottom of the wire wrap slot, a cooling medium inlet ring tube is connected to the left end of all the stator core heat exchange tubes and the wire wrap slot heat exchange tubes, and a cooling medium outlet ring tube is connected to the right end of all the stator core heat exchange tubes and the wire wrap slot heat exchange tubes, the cooling medium inlet ring tube is connected to the cooling medium inlet mother pipe, the cooling medium outlet ring tube is connected to the cooling medium outlet mother pipe, the cooling medium inlet mother pipe and the cooling medium outlet mother pipe are installed in the inner cavity of the fixed shaft, and are respectively extended through both ends to connect to the cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a longitudinal cross-sectional view of the present invention; Figure 2 It is a transverse cross-sectional view of the present invention.

[0007] In the figure: 1. drum body, 2. magnetic isolation sleeve, 3. rotor core, 4. stator core, 5. fixed shaft, 6. air gap, 7. left end motor, 8. middle motor, 9. right end motor, 102. end cover, 103. bearing, 104. rotor cover, 105. stator cover, 201. motor pin, 202. roller pin, 301. permanent magnet, 401. wire package groove, 402. small groove, 501. cooling medium inlet main pipe, 502. cooling medium outlet main pipe, 503. cooling medium inlet flange, 504. cooling medium outlet flange, 505. stator core heat exchange tube, 506. wire package groove heat exchange tube, 507. cooling medium inlet ring pipe, 508. cooling medium outlet ring pipe. DETAILED DESCRIPTION

[0008] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0009] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0010] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0011] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0012] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0013] It should be further understood that the term "and / or" used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0014] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0015] An energy-saving electric drum, comprising a drum body 1, a magnetic isolation sleeve 2, a rotor core 3, a stator core 4, a fixed shaft 5, a left motor 7, a middle motor 8, and a right motor 9, characterized in that: the drum body 1 is a cylindrical structure, the middle motor 8 is installed in the middle position inside, the left motor 7 is installed on the left side inside, and the right motor 9 is installed on the right side inside, the magnetic isolation sleeve 2 is embedded between the left motor 7, the middle motor 8, the right motor 9 and the drum body 1, each motor is composed of a rotor core 3, a stator core 4, a fixed shaft 5 and a stator coil, the rotor core 3 is connected to the magnetic isolation sleeve 2 on the outside, the rotor core 3 is inside the stator core 4, the stator core 4 is fixed on the fixed shaft 5, the stator coil is also wound on the stator core 4, and a uniform air gap 6 is provided between the outer surface of the stator core 4 and the inner surface of the rotor core 3; The stator core 4 includes a winding package slot 401 and a small slot 402. The winding package slot 401 and the small slot 402 have the same number of slots. The small slot 402 is distributed at the top middle position of each tooth of the stator core 4. The ratio of the number of slots of the winding package slot 401 to the number of poles of the rotor is (2p±1) / 3:2p, wherein p is the number of motor pole pairs, the number of motor pole pairs is 3 times the number of winding package slots 401±1, the number of motor pole pairs is an even number, the number of winding package slots 401 is an odd multiple of 3, the groove shape of each winding package slot 401 is consistent, and is evenly distributed at equal distances, and the stator winding package is wound in the winding package slot 401; the groove shape of the small slot 402 is an arc groove.

[0016] The inner surface of the rotor core 3 is provided with a plurality of dovetail-shaped notches, in which tile-shaped permanent magnets 301 are embedded.

[0017] The fixed shaft 5 is made of thick-walled seamless steel pipe, a stator core heat exchange tube 505 is installed in the bottom of the stator core 3 magnetic pole, a wire wrap slot heat exchange tube 506 is provided at the bottom of the wire wrap slot 401, a cooling medium inlet ring tube 507 is connected to the left end of all the stator core heat exchange tubes 505 and the wire wrap slot heat exchange tubes 506, and a cooling medium outlet ring tube 508 is connected to the right end of all the stator core heat exchange tubes 505 and the wire wrap slot heat exchange tubes 506, the cooling medium inlet ring tube 507 is connected to the cooling medium inlet mother pipe 501, the cooling medium outlet ring tube 508 is connected to the cooling medium outlet mother pipe 502, the cooling medium inlet mother pipe 501 and the cooling medium outlet mother pipe 502 are installed in the cavity of the fixed shaft 5, and are respectively connected to the cooling system through the two ends; the motor power line and signal line are also passed through the cavity of the fixed shaft 5.

[0018] The stator core heat exchange tube 505, the coil slot heat exchange tube 506, the cooling medium inlet ring tube 507 and the cooling medium outlet ring tube 508 are made of non-magnetic materials.

[0019] A roller pin 202 is further provided between the drum body 1 and the magnetic isolation sleeve 2 ; a motor pin 201 is further provided between the rotor core 3 and the magnetic isolation sleeve 2 .

[0020] The inner and outer diameters of the rotor core 3 and the stator core 4 of the left motor 7, the middle motor 8, and the right motor 9, as well as the winding groove 401 and the small groove 402 are all consistent, the winding turns and the winding direction of the winding are the same, the rotation speed is the same, but the power and torque are different. The power-on combination of the three motors is adjusted according to the operating load conditions. When fully loaded, the three motors are powered on and run at the same time. When running without load, only the motor with the smallest power is powered on and run. When lightly loaded, a small power motor and a medium power motor are operated. When relatively lightly loaded, a high power motor is operated. When medium and heavy, a high power motor and a small power motor are operated. When heavily loaded, a high power motor and a medium power motor are operated. The best energy-saving effect can be achieved by adjusting the motor power-on operation combination at any time. The motor is widely used in mining, metallurgy, chemical industry, coal, building materials, electricity, food, transportation and other departments.

Claims

1. An energy-saving electric drum, comprising a drum body (1), a magnetic isolation sleeve (2), a rotor core (3), a stator core (4), a fixed shaft (5), a left motor (7), a middle motor (8), and a right motor (9), characterized in that: The drum body (1) is a cylindrical structure, wherein a middle motor (8) is installed in the middle position inside the drum body, a left motor (7) is installed on the left side inside the drum body, and a right motor (9) is installed on the right side inside the drum body. A magnetic isolation sleeve (2) is embedded between the left motor (7), the middle motor (8), the right motor (9) and the drum body (1). Each motor is composed of a rotor core (3), a stator core (4), a fixed shaft (5) and a stator coil. The outside of the rotor core (3) is connected to the magnetic isolation sleeve (2), the inside of the rotor core (3) is the stator core (4), the stator core (4) is fixed on the fixed shaft (5), and the stator coil is also wound on the stator core (4). A uniform air gap (6) is provided between the outer surface of the stator core (4) and the inner surface of the rotor core (3). The stator core (4) comprises a coil slot (401) and a small slot (402), the coil slot (401) and the small slot (402) having the same number of slots, the small slot (402) being distributed at the middle position of the top of each tooth of the stator core (4), the ratio of the number of slots of the coil slot (401) to the number of poles of the rotor being (2p±1) / 3:2p, wherein p is the number of motor pole pairs, the number of motor pole pairs is 3 times the number of coil slots (401)±1, the number of motor pole pairs is an even number, the number of coil slots (401) is an odd multiple of 3, the groove shape of each coil slot (401) is consistent, and they are evenly distributed at equal distances, and the stator coil is wound in the coil slot (401); the groove shape of the small slot (402) is an arc-shaped groove.

2. The inner surface of the rotor core (3) is provided with a plurality of dovetail-shaped notches, and tile-shaped permanent magnets (301) are embedded in the notches.

3. The fixed shaft (5) is made of a thick-walled seamless steel pipe. A stator core heat exchange tube (505) is installed in the bottom of the magnetic pole of the stator core (3). A wire wrap slot heat exchange tube (506) is provided at the bottom of the wire wrap slot (401). A cooling medium inlet ring tube (507) is connected to the left ends of all the stator core heat exchange tubes (505) and the wire wrap slot heat exchange tubes (506). A cooling medium outlet ring tube (508) is connected to the right ends of all the stator core heat exchange tubes (505) and the wire wrap slot heat exchange tubes (506). The cooling medium inlet ring tube (507) is connected to the cooling medium inlet mother tube (501). The cooling medium outlet ring tube (508) is connected to the cooling medium outlet mother tube (502). The cooling medium inlet mother tube (501) and the cooling medium outlet mother tube (502) are installed in the cavity of the fixed shaft (5), and are respectively connected to the cooling system through two ends extending out.

4. The inner diameter and outer diameter of the rotor core (3) and the stator core (4) of the left motor (7), the middle motor (8) and the right motor (9) are consistent, as are the winding grooves (401) and the small grooves (402), the number of turns of the windings and the winding direction, the rotation speed are the same, but the power and torque are different, and the best energy saving effect can be achieved by adjusting the motor power-on operation combination at any time.

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