Three-phase permanent magnet synchronous electric roller suitable for thermal power plant conveying system

Abstract

The utility model discloses a three-phase permanent magnet synchronous electric roller suitable for a thermal power plant conveying system, and relates to the technical field of electric rollers, the three-phase permanent magnet synchronous electric roller comprises two fixing seats and a roller, a fixing box is installed in the roller, a motor is fixedly connected in the fixing box, the left side face of the fixing box is fixedly connected with a planetary reducer, and the planetary reducer is fixedly connected with a motor. An input shaft of the planetary reducer is fixedly connected with an output shaft of the motor, and the output end of the planetary reducer is fixedly connected with a rotating shaft. Through the arranged air cooling assembly, cold air can be blown into the roller through cooperation of an air suction fan and an air inlet hole to cool the interior of the roller, and then hot air obtained after heat exchange can be exhausted out of the roller through an exhaust fan and an exhaust hole; therefore, cold air can continuously enter the roller to effectively cool the motor and the planetary reducer, so that the motor and the planetary reducer are prevented from breaking down due to high temperature, and the heat resistance and the stability of the electric roller are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric roller technical field especially relates to a three -phase permanent magnet synchronous motor roller suitable for thermal power plant conveying system. BACKGROUND

[0002] In the operation process of thermal power plant, coal needs to be sent into the combustion furnace through the conveying system to provide energy for the generator, and the conveying system is generally a belt conveying device, which can quickly convey a large amount of coal into the combustion furnace.

[0003] In the existing belt conveying device, a motor + hydraulic coupler + speed reducer + shaft coupling steel roller is generally used to drive the belt for multi-device transmission. The driving system has the following status: (1) high energy consumption: three-phase asynchronous motor has low efficiency; multi-device transmission has large mechanical loss, and the operation and maintenance cost is high; (2) difficult to reduce consumption: the belt runs at a constant speed and cannot be adjusted to reduce consumption; multi-device transmission cannot avoid mechanical loss, and the maintenance amount is difficult to reduce under multi-device operation; (3) many maintenance points: only one belt drive requires regular maintenance of five different devices, which means more spare parts and different management schemes, and the maintenance cost cannot be reduced.

[0004] In order to reduce the operation and maintenance cost of the belt conveying device, some thermal power plants now use three-phase permanent magnet synchronous motor roller to replace the driving device of the motor + hydraulic coupler + speed reducer + shaft coupling steel roller for driving the belt. The motor and speed reducer are installed inside the roller, so that the structure of the motor roller is compact and has good sealing performance, which can effectively prevent the motor and speed reducer from being damaged due to exposure to the outside, thereby reducing the maintenance cost. The motor roller can effectively reduce the operating current required during operation, thereby reducing the energy consumption of coal conveying.

[0005] However, since the motor and speed reducer are built-in inside the roller, the heat generated during operation is not easy to dissipate, resulting in high temperature inside the roller, which easily causes overheating and damage to the motor inside the roller, seriously affecting the service life of the three-phase permanent magnet synchronous motor.

[0006] In order to solve the above problems, a three-phase permanent magnet synchronous motor roller suitable for thermal power plant conveying system is needed. Utility model content

[0007] The utility model aims to provide a three-phase permanent magnet synchronous motor roller suitable for thermal power plant conveying system, to solve the problem that the existing three-phase permanent magnet synchronous motor roller is prone to high temperature inside the roller during operation, which easily causes failure of the motor and speed reducer inside the roller.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: A three -phase permanent magnet synchronous motor roller suitable for power plant conveying system, including two fixed base and drum, the fixed box is installed in the drum, the fixed box is fixedly connected with motor, the left side surface of fixed box is fixedly connected with planetary reducer, the input shaft of planetary reducer is fixedly connected with the output shaft of motor, the output end of planetary reducer is fixedly connected with the shaft, the shaft is rotatably connected on the left side fixed base, the right side surface of fixed box is fixedly connected with fixed shaft, the fixed shaft is fixedly inserted in the right side fixed base, the outer periphery of shaft and fixed shaft is rotatably sleeved with end cover, the drum is fixedly sleeved on the outer periphery of two end covers, the fixed base on the right side is connected with the air -cooled assembly for cooling the inside of drum,

[0009] The air -cooled assembly includes the installation box fixedly connected on the right side surface of the right side fixed base, two filter screens are fixedly connected on the right side surface of the installation box in a symmetrical manner, an exhaust fan and a suction fan are fixedly connected in the installation box through a partition plate, and the exhaust fan is located on the upper side of the suction fan, the right end of the fixed shaft is fixedly inserted on the left side surface of the installation box and is communicated with the inner cavity of the installation box, the right end of the fixed shaft is provided with an exhaust hole and an air inlet hole, and the exhaust hole and the air inlet hole are located on the upper and lower sides of the partition plate, and the left ends of the exhaust hole and the air inlet hole respectively penetrate the top and the bottom of the fixed shaft.

[0010] Preferably, the air -cooled assembly further includes an air flow limiting mechanism connected to the inner side wall of the drum, the air flow limiting mechanism is located on the right side of the fixed box, the air flow limiting mechanism makes the air flow flowing to the left only flow through the lower half of the drum, the air flow limiting mechanism makes the existing air flow only flow through the upper half of the drum, the advantage of such arrangement is that the cold air sucked by the suction fan can flow into the drum in an orderly manner, and the hot air after heat exchange can be discharged by the exhaust fan in an orderly manner, so that the air -cooled cooling work can be carried out smoothly and orderly, the motor and the planetary reducer in the drum can be prevented from malfunctioning due to high temperature, and the heat resistance and stability of the motorized drum are improved.

[0011] Preferably, the airflow limiting mechanism comprises a plurality of circular rods fixedly connected to the inner side wall of the drum in an annular equiangular manner, and further comprises a plurality of baffles distributed in an annular equiangular manner, a plurality of circular holes are annularly and equiangularly formed in the side faces of the plurality of baffles away from each other, one end of each of the plurality of circular rods is rotatably connected to the inner bottom wall of each of the plurality of circular holes, a fixing ring is fixedly sleeved on the outer circumferential surface of each of the plurality of circular rods, an elastic member is fixedly connected between the fixing ring and the inner bottom wall of each of the adjacent circular holes, the plurality of baffles located in the upper half of the drum can only rotate towards the right end of the drum at a maximum rotation angle of ninety degrees, and the plurality of baffles located in the lower half of the drum can only rotate towards the left end of the drum at a maximum rotation angle of ninety degrees, so that the cold air can flow into and out of the drum along a fixed track, and the air cooling work can be smoothly and reliably completed.

[0012] Preferably, the air cooling assembly further comprises an air inlet pipe communicated with the left end of the air inlet hole, and an air inlet cover communicated with the end of the air inlet pipe away from the air inlet hole, the air inlet cover is semicircular and the air outlet end of the air inlet cover is close to the baffles in the lower half of the drum, so that the cold air sucked into the drum by the air suction fan can be concentrated and blown to the plurality of baffles in the lower half, and the cold air can smoothly pass through the plurality of baffles in the lower half and be blown to the fixed box and the planetary reducer, thereby improving the cooling effect on the motor and the planetary reducer and further reducing the possibility of failure of the motor and the planetary reducer due to high temperature.

[0013] Preferably, the number of the baffles is not more than sixteen, so that the baffles have sufficient wind receiving area, the cold air and the hot air can be smoothly blown away from the plurality of baffles in the lower half and the plurality of baffles in the upper half respectively, and the air can flow at the fastest speed, thereby improving the air cooling effect.

[0014] Preferably, the air inlet hole and the air outlet hole have the same hole diameter, and the vertical cross-sectional area of the air inlet hole is between one-eighth and one-sixth of the vertical cross-sectional area of the fixed shaft, so that the ventilation volume is improved without seriously affecting the rigidity and strength of the fixed shaft, and the air cooling effect is effectively improved.

[0015] In summary, the technical effects and advantages of the present application are as follows:

[0016] 1. The air-cooled assembly is set up, and cold air can be blown into the drum through the air inlet hole and the air inlet fan to cool the inside of the drum, then the hot air after heat exchange can be discharged from the drum through the exhaust fan and the exhaust hole, so that the cold air can continuously enter the inside of the drum to effectively cool the motor and the planetary reducer, thereby avoiding the motor and the planetary reducer from malfunctioning due to high temperature, and improving the heat resistance and stability of the electric drum.

[0017] 2. The air flow limiting mechanism is set up, the multiple baffles in the upper half part can only rotate towards the direction close to the right end of the drum with a maximum rotation angle of ninety degrees, and the multiple baffles in the lower half part of the drum can only rotate towards the direction close to the left end of the drum with a maximum rotation angle of ninety degrees, so that the air inlet hole, the air inlet fan, the exhaust hole and the exhaust fan can ensure that the cold air flows into and out of the drum along the fixed track, and ensure that the air-cooled cooling work is smoothly and reliably completed. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 It is the first structural schematic view of the present application;

[0020] Figure 2 It is the second structural schematic view of the present application;

[0021] Figure 3 It is the front view of the present application;

[0022] Figure 4 It is the left view of the present application;

[0023] Figure 5 It is the enlarged schematic view of A in the present application Figure 3

[0024] Figure 6 It is the enlarged schematic view of B in the present application Figure 3

[0025] ​​In the figure: 1, fixed seat; 2, roller; 3, fixed box; 4, planetary reducer; 5, rotating shaft; 6, fixed shaft; 7, end cover; 8, air cooling assembly; 81, mounting box; 82, filter screen; 83, exhaust fan; 84, air suction fan; 85, exhaust hole; 86, air inlet hole; 87, air flow limiting mechanism; 871, round rod; 872, baffle; 873, round hole; 874, fixed ring; 875, elastic piece; 88, air inlet pipe; 89, air inlet cover. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Please refer to Figures 1-6 The three-phase permanent magnet synchronous motor roller suitable for the power plant conveying system shown in the figure, including two fixed seats 1 and a roller 2, the roller 2 is internally provided with a fixed box 3, the fixed box 3 is fixedly connected with a motor, the left side surface of the fixed box 3 is fixedly connected with a planetary reducer 4, the input shaft of the planetary reducer 4 is fixedly connected with the output shaft of the motor, the output end of the planetary reducer 4 is fixedly connected with a rotating shaft 5, the rotating shaft 5 is rotatably connected to the left fixed seat 1, the right side surface of the fixed box 3 is fixedly connected with a fixed shaft 6, the fixed shaft 6 is fixedly inserted into the right fixed seat 1, the outer circumferential surface of the rotating shaft 5 and the fixed shaft 6 is rotatably sleeved with an end cover 7, the roller 2 is fixedly sleeved on the outer circumferential surface of the two end covers 7, the right fixed seat 1 is connected with an air cooling assembly 8 for cooling the inside of the roller 2;

[0028] The air cooling assembly 8 includes a mounting box 81 fixedly connected to the right side surface of the right fixed seat 1, the right side surface of the mounting box 81 is fixedly connected with two filter screens 82 in a symmetrical manner, the mounting box 81 is fixedly connected with an exhaust fan 83 and an air suction fan 84 in the mounting box 81 through a partition plate, the exhaust fan 83 is located on the upper side of the air suction fan 84, the right end of the fixed shaft 6 is fixedly inserted into the left side surface of the mounting box 81 and is connected with the inner cavity of the mounting box 81, the right end of the fixed shaft 6 is provided with an exhaust hole 85 and an air inlet hole 86, the exhaust hole 85 and the air inlet hole 86 are located on the upper and lower sides of the partition plate, the left end of the exhaust hole 85 and the air inlet hole 86 respectively penetrates the top and the bottom of the fixed shaft 6;

[0029] The filter screen 82 located on the lower side can be connected with the air outlet pipe of the air conditioner, so that the cold air can be sucked into the inside of the roller 2 by the air suction fan 84 through the air inlet hole 86.

[0030] Reference Figures 3-5, the air-cooling assembly 8 further comprises a gas flow limiting mechanism 87 connected to the inner side wall of the drum 2, the gas flow limiting mechanism 87 is located at the right side of the fixed box 3, and the gas flow limiting mechanism 87 enables the gas flow flowing to the left to only flow through the lower half of the drum 2 and enables the existing gas flow to only flow through the upper half of the drum 2.

[0031] Specifically, the cold air sucked by the suction fan 84 can flow into the drum 2 in an orderly manner, and the hot air after heat exchange can be discharged by the exhaust fan 83 in an orderly manner, so that the air-cooling operation can be carried out smoothly and orderly, the motor and the planetary reducer 4 in the drum 2 can be prevented from malfunctioning due to high temperature, and the heat resistance and stability of the electric drum are improved.

[0032] Reference Figures 3-6 , the gas flow limiting mechanism 87 comprises a plurality of circular rods 871 fixedly connected to the inner side wall of the drum 2 in a ring shape, the gas flow limiting mechanism 87 further comprises a plurality of baffles 872 distributed in a ring shape, a plurality of circular holes 873 are formed in the side surfaces of the plurality of baffles 872 away from each other in a ring shape, one end of each of the plurality of circular rods 871 is rotatably connected to the inner bottom wall of each of the plurality of circular holes 873, a fixing ring 874 is fixedly sleeved on the outer circumferential surface of each of the plurality of circular rods 871, and an elastic element 875 is fixedly connected between the fixing ring 874 and the inner bottom wall of each adjacent circular hole 873, the plurality of baffles 872 located in the upper half of the drum 2 can only rotate toward the right end of the drum 2 at a maximum rotation angle of ninety degrees, and the plurality of baffles 872 located in the lower half of the drum 2 can only rotate toward the left end of the drum 2 at a maximum rotation angle of ninety degrees.

[0033] Specifically, the plurality of baffles 872 located in the upper half of the drum 2 can only rotate toward the right end of the drum 2 at a maximum rotation angle of ninety degrees, and the plurality of baffles 872 located in the lower half of the drum 2 can only rotate toward the left end of the drum 2 at a maximum rotation angle of ninety degrees, so that the cold air can flow into and out of the drum 2 along a fixed track in cooperation with the air inlet hole 86, the suction fan 84, the air outlet hole 85 and the exhaust fan 83, and the air-cooling operation can be completed smoothly and reliably.

[0034] Reference Figure 3 and Figure 5 , the air-cooling assembly 8 further comprises an air inlet pipe 88 communicated with the left end of the air inlet hole 86, the air inlet pipe 88 is communicated with an air inlet cover 89 away from the air inlet hole 86, and the air inlet cover 89 is a semicircular ring and the air outlet end thereof is close to the baffles 872 in the lower half of the drum 2.

[0035] Specifically, the cold air sucked into the drum 2 by the air suction fan 84 can be blown to the multiple baffles 872 of the lower half, so that the cold air can pass through the multiple baffles 872 of the lower half and be blown to the fixed box 3 and the planetary reducer 4, thereby improving the cooling effect on the motor and the planetary reducer 4 and further reducing the possibility of failure of the motor and the planetary reducer 4 due to high temperature.

[0036] With reference to Figure 4 The number of baffles 872 is not more than sixteen.

[0037] Specifically, the baffles 872 have sufficient wind receiving area, so that the cold air and the hot air can be smoothly blown away from the multiple baffles 872 of the lower half and the multiple baffles 872 of the upper half, respectively, to ensure that the air can flow at the fastest speed and improve the effect of air cooling.

[0038] With reference to Figure 3 The hole diameters of the air inlet hole 86 and the air outlet hole 85 are the same, and the vertical sectional area of the air inlet hole 86 is between one-eighth and one-sixth of the vertical sectional area of the fixed shaft 6.

[0039] Specifically, the ventilation volume is improved without seriously affecting the stiffness and strength of the fixed shaft 6, thereby effectively improving the effect of air cooling.

[0040] Working principle: Start the air suction fan 84 to suck the external cold air into the drum 2 through the air inlet hole 86, the air inlet pipe 88 and the air inlet cover 89, and then the wind power of the cold air will overcome the elastic force of the elastic member 875 to push the lower baffles 872 to rotate towards the left end of the drum 2, so that the cold air will flow through the lower baffles 872 towards the fixed box 3 and the planetary reducer 4, thereby cooling the motor and the planetary reducer 4.

[0041] Then the cold air is heated to become hot air and rises to the upper side of the drum 2. As the cold air continuously enters, the air pressure on the left side of the baffle 872 will overcome the elastic force of the elastic member 875 on the upper side of the baffle 872 and push the upper side of the baffle 872 to rotate towards the right side of the drum 2, so that the hot air will flow to the right side of the baffle 872. Then start the air exhaust fan 83 to suck the hot air out of the drum 2 through the air outlet hole 85, so that the cold air can continuously flow into the inside of the drum 2, thereby effectively and continuously cooling the motor and the planetary reducer 4 by air cooling, and avoiding failure of the motor and the planetary reducer 4 due to high temperature.

[0042] It should be explained finally: above only is the preferred embodiment of the utility model and is not used for limiting the utility model, although the utility model has been explained in detail with reference to foregoing embodiment, for the skilled person in the art, it still can modify the technical scheme recorded in foregoing each embodiment or make equivalent replacement to part technical features, any modification, equivalent replacement, improvement etc. that is done within the spirit and principle of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A three-phase permanent magnet synchronous motorized roller suitable for use in a conveyor system of a thermal power plant, comprising two fixed seats (1) and a roller (2), characterized in that: The fixed box (3) is internally fixedly connected with a motor, the left side surface of the fixed box (3) is fixedly connected with a planetary reducer (4), the input shaft of the planetary reducer (4) is fixedly connected with the output shaft of the motor, the output end of the planetary reducer (4) is fixedly connected with a rotating shaft (5), the rotating shaft (5) is rotatably connected to the left fixed seat (1), the right side surface of the fixed box (3) is fixedly connected with a fixed shaft (6), the fixed shaft (6) is fixedly inserted into the right fixed seat (1), the outer circumferential surfaces of the rotating shaft (5) and the fixed shaft (6) are rotatably sleeved with end covers (7), the drum (2) is fixedly sleeved on the outer circumferential surfaces of the two end covers (7), and the right fixed seat (1) is connected with an air cooling assembly (8) for cooling the inside of the drum (2). The air cooling assembly (8) comprises a mounting box (81) fixedly connected to the right side surface of the right fixed seat (1), two filter screens (82) are fixedly connected to the right side surface of the mounting box (81) in a symmetrical manner, an exhaust fan (83) and an air suction fan (84) are fixedly connected in the mounting box (81) by a partition plate, the exhaust fan (83) is located on the upper side of the air suction fan (84), the right end of the fixed shaft (6) is fixedly inserted into the left side surface of the mounting box (81) and is in communication with the inner cavity of the mounting box (81), the right end of the fixed shaft (6) is provided with an exhaust hole (85) and an air inlet hole (86), and the exhaust hole (85) and the air inlet hole (86) are located on the upper and lower sides of the partition plate, respectively, and the left ends of the exhaust hole (85) and the air inlet hole (86) respectively penetrate the top and the bottom of the fixed shaft (6).

2. A three-phase permanent magnet synchronous motorized roller for use in a conveyor system of a thermal power plant as claimed in claim 1, wherein: The air cooling assembly (8) further comprises an airflow limiting mechanism (87) connected to the inner side wall of the drum (2), the airflow limiting mechanism (87) is located on the right side of the fixed box (3), and the airflow limiting mechanism (87) allows the airflow flowing to the left to flow only through the lower half of the drum (2), and the airflow limiting mechanism (87) allows the existing airflow to flow only through the upper half of the drum (2).

3. A three phase permanent magnet synchronous motorized roller for use in a conveyor system for a thermal power plant as claimed in claim 2, wherein: The airflow limiting mechanism (87) comprises a plurality of circular rods (871) fixedly connected to the inner side wall of the drum (2) in a ring shape and at equal angles, and a plurality of baffle plates (872) distributed in a ring shape and at equal angles, a plurality of circular holes (873) are formed in the side surfaces of the plurality of baffle plates (872) in a ring shape and at equal angles, one end of each of the plurality of circular rods (871) is rotatably connected to the inner bottom wall of each of the plurality of circular holes (873), a fixing ring (874) is fixedly sleeved on the outer circumferential surface of each of the plurality of circular rods (871), an elastic member (875) is fixedly connected between the fixing ring (874) and the inner bottom wall of each adjacent circular hole (873), the plurality of baffle plates (872) located in the upper half of the drum (2) can only rotate towards the direction close to the right end of the drum (2) and the maximum rotation angle is ninety degrees, and the plurality of baffle plates (872) located in the lower half of the drum (2) can only rotate towards the direction close to the left end of the drum (2) and the maximum rotation angle is ninety degrees.

4. A three phase permanent magnet synchronous motorized roller for use in a conveyor system for a thermal power plant as claimed in claim 3, wherein: The air-cooling assembly (8) further comprises an air inlet pipe (88) communicated with the left end of the air inlet hole (86), and an air inlet cover (89) communicated with the end of the air inlet pipe (88) away from the air inlet hole (86), wherein the air inlet cover (89) is a semi-circular ring, and the air outlet end of the air inlet cover (89) is close to the baffle (872) of the lower half of the drum (2).

5. A three phase permanent magnet synchronous motorized roller for use in a conveyor system for a thermal power plant as claimed in claim 4, wherein: The number of the baffles (872) is not more than sixteen.

6. A three phase permanent magnet synchronous motorized roller suitable for use in a conveyor system for a thermal power plant as claimed in claim 5, wherein: The air inlet hole (86) and the air outlet hole (85) have the same hole diameter, and the vertical sectional area of the air inlet hole (86) is between one-eighth and one-sixth of the vertical sectional area of the fixed shaft (6).

Images