A permanent magnet variable speed energy-saving pulper

Abstract

The present invention discloses a permanent magnet variable speed energy-saving pulper, comprising a tank body, a good pulp chamber part, a rotor part and a driving part, wherein the driving part is a permanent magnet driving device, and the permanent magnet driving device comprises a casing, a stator assembly, a rotor assembly, an output, a bearing assembly and a water retaining ring, and one end of the output shaft is installed with a water retaining ring located outside the casing; a spoiler is provided on one side of the tank body, and the rotor part comprises an impeller, and the impeller comprises a blade and a flying wing, and the flying wing is installed obliquely on one side of the blade. The present invention replaces the driving part of the traditional pulper, and the permanent magnet driving device directly drives the rotor part to rotate, which is directly connected to the pulper, reducing the installation requirements, and the output shaft and the casing are connected by an upper bearing and a lower bearing group, which can withstand certain radial force and axial force, so that the device can withstand the impact of materials on the rotor part, and improve the stability of the use of the device.

Description

Technical Field

[0001] The invention relates to the technical field of pulping equipment, in particular to a permanent magnet variable speed energy-saving pulper. Background Art

[0002] The main structure of the traditional hydraulic pulper includes a tank body, a pulp chamber, a rotor, and a drive part, wherein the drive part includes a motor A, a reducer B, and a transmission part C. Since the rotor speed of the pulper is low, ordinary motors of a certain power cannot meet the requirements of low speed and high torque, and the main shaft cannot withstand large axial loads. Therefore, the conventional pulper transmission system must be driven by a motor to drive the reducer to output a large torque, and the working conditions of the pulper limit the reducer from being directly connected to the rotor assembly, so the reducer must transmit torque through a separate transmission assembly.

[0003] Conventional drive assembly has many modules, complex structure, high installation requirements, and cannot achieve energy saving by changing the speed of ordinary asynchronous motors. In addition, conventional hydraulic pulpers use high-voltage and high-power motors, which have large starting currents and always operate at the highest speed during normal operation. The crushing force and energy consumption cannot be in an energy balance state, resulting in energy loss and no crushing force. Summary of the invention

[0004] The present invention aims at the above-mentioned deficiencies in the prior art and provides a permanent magnet variable speed energy-saving pulper, which, on the basis of reducing the installation requirements, can also meet the use requirements of low speed and high torque of hydraulic pulping and is more reliable to use.

[0005] To achieve the above purpose, the invention provides the following technical solutions:

[0006] A permanent magnet variable speed energy-saving pulper comprises a trough body, a good pulp chamber part, a rotor part and a driving part, characterized in that the driving part is a permanent magnet driving device, the permanent magnet driving device comprises a casing, a stator assembly, a rotor assembly, an output, a bearing assembly and a water retaining ring, one end of the output shaft is installed with a water retaining ring located outside the casing; a spoiler is provided on one side of the trough body, the rotor part comprises an impeller, the impeller comprises a blade and a wing, and the wing is installed obliquely on one side of the blade.

[0007] Preferably, the cross-section of the spoiler is a triangle, and the upper edge and the lower edge thereof approach to the same vertex from the outside to the inside.

[0008] Preferably, the proportion of the upper edge portion of the spoiler to the entire spoiler is smaller than the proportion of the lower edge portion of the spoiler to the entire spoiler.

[0009] Preferably, the lower edge of the blade includes a wavy portion and a straight portion, and the length of the wavy portion is greater than the length of the straight portion.

[0010] Preferably, the wave portion includes three arc-shaped portions with arc directions opposite to each other.

[0011] Preferably, the upper edge of the blade includes an arc portion and a straight portion, and a wing is mounted on the straight portion.

[0012] Preferably, a control module is further included, a liquid level module and a concentration module are arranged in the tank body, and the liquid level module, the concentration module and the permanent magnet drive device are respectively connected to the control module.

[0013] Preferably, a slurry outlet pipe is provided on one side of the good pulp chamber, and one side of the slurry outlet pipe is connected to a slurry pump.

[0014] Compared with the prior art, the invention has the following beneficial effects:

[0015] 1. The present invention replaces the driving part of the traditional pulper, and the permanent magnet driving device directly drives the rotor part to rotate. The permanent magnet driving device is directly connected to the pulper, which reduces the installation requirements. The output shaft and the casing are connected by an upper bearing and a lower bearing group, which can withstand a certain radial force and axial force, so that the device can withstand the impact of the material on the rotor part, and the stability of the use of the device is improved.

[0016] The permanent magnet drive device has the characteristics of constant power, constant torque, high efficiency, etc. It has a high power density and a no-load current of 1 / 20 of that of an ordinary asynchronous motor. The transmission efficiency of the permanent magnet drive device is 1.1 times that of the traditional pulper drive part.

[0017] 2. The present invention can also detect the operation status of the equipment and feed back the detected information to the control module. The control module automatically changes the rotation speed of the rotor, thereby achieving an energy balance between the crushing force and energy consumption, and ultimately achieving the purpose of energy saving.

[0018] 3. The impeller in the present invention mainly plays the role of stirring the slurry and cleaning the screen plate, so that the slurry reaches a reasonable vortex state and prevents the screen plate from being blocked. The structure and layout of the impeller blades and impeller wings in this device are improved, the purpose is to improve the impeller stirring the slurry fluid under a certain speed, thereby reducing energy consumption.

[0019] A special spoiler structure is added to the tank body, which can enhance the vortex without increasing the rotation speed, thereby improving the crushing efficiency. When used with the improved impeller, it also plays a role in reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the background technology;

[0021] Figure 2 The structure of the present invention is schematically shown in FIG. Figure 1 ;

[0022] Figure 3 It is a schematic diagram of the structure of a conventional rotor;

[0023] Figure 4 It is a schematic diagram of the structure of the rotor in the device;

[0024] Figure 5 It is a structural diagram of the driving part;

[0025] Figure 6 It is a schematic diagram of the structure of the water retaining ring;

[0026] Figure 7 This is a schematic diagram of the water cooling system.

[0027] Figure 8 It is a schematic diagram of the structure of the heat dissipation cavity;

[0028] Fig. 9 This is the structure diagram of the spoiler Figure 1 ;

[0029] Fig.10 This is the structure diagram of the spoiler Figure 2 ;

[0030] Fig.11 The structure of the present invention is schematically shown in FIG. Figure 2 .

[0031] In the figure: 1-tank body, 2-good pulp chamber part, 3-rotor part, 31-blade, 32-wing, straight part a1, arc part b1, straight part a2, arc part b2, 4-driving part, 41-casing, 42-output shaft, 43-stator assembly, 44-rotor assembly, 451-upper bearing, 452-lower bearing group, 46-water retaining ring, 461-upper ring body, 462-lower ring body, 463-sealing ring, 464-upper oil seal, 465-oil filling port, 466-lower oil seal group, 467-labyrinth oil groove, 471-heat dissipation cavity, 4711-main water channel, 4712-branch water channel, 472-water inlet interface, 473-water outlet interface, 474-radiator, 475-water pump, 5-spoiler, 6-slurry outlet pipe, 7-slurry pump. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention 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 of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Example

[0034] A permanent magnet variable speed energy-saving pulper comprises a tank body 1, a good pulp chamber part 2, a rotor part 3 and a driving part, wherein the good pulp chamber part 2 is installed at the bottom of the tank body 1, the driving part is a permanent magnet driving device, the rotor part 3 is installed at the end of the output shaft 42 of the permanent magnet driving device, the rotor part 3 is located above the good pulp chamber at the bottom of the tank body 1, and the output shaft 42 of the permanent magnet driving device passes through the good pulp chamber and is located at the bottom of the good pulp chamber. A pulp outlet pipe 6 is provided at one side of the good pulp chamber, and one side of the pulp outlet pipe 6 is connected to a pulp pump 7.

[0035] The device is installed on the base of the hydraulic pulper, the base is fixed on the foundation, and the rotor part 3 of the hydraulic pulper is directly installed on the output shaft 42. The permanent magnet drive device of the hydraulic pulper has the characteristics of constant power, constant torque, high efficiency, high power density, and no-load current is 1 / 20 of that of ordinary asynchronous motors. The transmission efficiency of the permanent magnet drive device is 1.1 times that of the traditional pulper drive part.

[0036] The permanent magnet drive device includes a housing 41, an output shaft 42, a stator assembly 43, a bearing assembly and a rotor assembly 44. The stator assembly 43 includes a stator winding group and a stator core. The rotor assembly 44 includes a magnetic steel, a rotor core and a rotor pressing ring. The rotor core is mounted on the output shaft 42. The output shaft 42 forms a torque output through the magnetic field formed by the interaction between the magnetic steel on the rotor core and the stator winding group. The output shaft 42 is directly connected to the rotor part 3 of the hydraulic pulper. The shaft end of the output shaft 42 is designed according to the installation size of the rotor part 3, generally a conical fit, which is convenient for disassembly.

[0037] The bearing assembly includes an upper bearing 451 and a lower bearing group 452. The upper bearing 451 is provided on the upper side of the housing 41, and the lower bearing group 452 is provided on the lower side. The lower bearing group 452 includes two bearings, which bear radial load impact and axial load impact respectively. In addition, the upper bearing 451 also bears a part of the radial force and axial force, so that the device can withstand the impact of the material on the rotor part 3, and improve the stability of the use of the device.

[0038] A water retaining ring 46 is provided at one end of the output shaft 42, and the water retaining ring 46 is located outside the casing 41. Because the liquid in the tank body 1 will penetrate into the casing 41 along the output shaft 42 when the pulper is running, the water retaining ring 46 is provided with a sealing structure, which can prevent the leaked liquid from continuing to leak and discharge the leaked liquid to the outside, thereby protecting the components inside the casing 41 and ensuring the reliable use of the device.

[0039] The water retaining ring 46 comprises an upper ring body 461 and a lower ring body 462 matched with the upper ring body 461. The lower ring body 462 is installed on the housing 41. The upper ring body 461 is sleeved on the output shaft 42. When the output shaft 42 rotates, the upper ring body 461 is driven to rotate. A sealing ring 463, a labyrinth oil groove 467 and an upper oil seal 464 are arranged from top to bottom between the upper ring body 461 and the output shaft 42. An oil filling port 465 is arranged on one side of the upper oil seal 464. A lower oil seal group 466 is arranged between the lower ring body 462 and the output shaft 42. The sealing structure can prevent the leaked liquid from continuing to leak and discharge the leaked liquid to the outside. As the output shaft 42 rotates, the upper ring body 461 rotates. When the upper ring body 461 rotates, the liquid dripping on its surface is thrown out by centrifugal force, thereby realizing the function of discharging the leaked liquid to the outside.

[0040] Since the device will generate a large amount of heat after working for a long time, causing the internal temperature to rise and posing a risk of burns, a water cooling system for cooling is also provided. The water cooling system includes a heat dissipation chamber 471, cold water and a radiator 474. The water cooling system displaces and discharges the heat generated inside the casing 41 through water flow, thereby achieving a cooling effect.

[0041] The housing 41 is provided with a heat dissipation cavity 471 for cold water circulation. The heat dissipation cavity 471 is arranged in an annular shape, and the main water channel 4711 at the water inlet interface 472 is V-shaped. The main water channel 4711 evenly supplies cold water to the annular branch water channels 4712, and the cold water is discharged from the opposite water outlet interface 473. This arrangement makes the flow of cold water uniform, ensuring the same cooling effect from top to bottom.

[0042] A water inlet interface 472 and a water outlet interface 473 are provided on one side of the housing 41, and a radiator 474 and a water pump 475 are provided on one side of the water outlet interface 473. The radiator cavity 471 is used in conjunction with cold water and the radiator 474. The cooling water enters the radiator cavity 471 through the water inlet interface 472 on the outside of the housing 41 and is discharged from the water outlet interface 473. After being discharged, the water is cooled by the external radiator 474 and is recycled.

[0043] When the permanent magnet drive device is running, the stator winding group is energized to form a rotating magnetic field. The rotating magnetic field interacts with the magnetic field of the magnetic steel to form a torque. The magnetic steel is acted upon by the electromagnetic force to form a torque. The torque forms an electromagnetic torque on the output shaft 42, so that the output shaft 42 rotates along the rotating magnetic field.

[0044] A spoiler 5 is provided on one side of the trough body 1. The spoiler 5 has a special structure. The cross-section of the spoiler 5 is triangular, and its upper edge and lower edge approach the same vertex from the outside to the inside, that is, from the bottom cone surface and the top cone surface, they are radially inward and the size gradually increases.

[0045] The proportion of the upper edge of the spoiler 5 to the whole spoiler 5 is smaller than the proportion of the lower edge of the spoiler 5 to the whole spoiler 5. The spoiler 5 can enhance the vortex without increasing the rotation speed, thereby improving the crushing efficiency. The spoiler 5 can be designed with different structures, quantities and positions according to different pulper structures and different sizes.

[0046] Because under the premise of the same pulper structure, the higher the rotor speed, the larger the pulping vortex generated, the higher the pulping efficiency, but the higher the energy consumption, that is, the speed is proportional to the power. Therefore, the special spoiler 5 structure changes the conventional pulper vortex state, so that the vortex can be enhanced without increasing the speed, thereby improving the pulping efficiency.

[0047] The rotor part 3 includes an impeller, which mainly plays the role of stirring the slurry and cleaning the screen plate, so that the slurry reaches a reasonable vortex state and prevents the screen plate from being blocked.

[0048] The impeller includes a blade 31 and a wing 32, and the wing 32 is installed obliquely on one side of the blade 31. The lower edge of the blade 31 includes a wave portion and a straight portion a2, and the length of the wave portion is greater than the length of the straight portion a2. The wave portion includes three arc portions b2 with arc directions opposite to each other. The upper edge of the blade 31 includes an arc portion b1 and a straight portion a1, and the wing 32 is installed on the straight portion a1.

[0049] The blade 31 structure and the wing 32 structure of the impeller are key factors affecting the crushing efficiency and energy consumption. The present application has modified and optimized the structure of the impeller blade 31 and the wing 32 structure, with the aim of improving the impeller's stirring fluid of the slurry under the premise of a certain rotation speed, thereby reducing energy consumption.

[0050] The device also includes a control module, which is a DCS control system. A liquid level module and a concentration module are arranged in the tank body 1, and the liquid level module, the concentration module and the permanent magnet drive device are respectively connected to the control module.

[0051] When pulping, first inject a certain amount of water into the tank body 1, then power on the driving part, the driving part starts to start, the rotor part 3 rotates and starts stirring, and water continues to be injected into the tank body 1. After a certain liquid level, waste paper raw materials are added. After reaching the required crushing concentration, the pulp pump 7 is turned on to extract the crushed pulp. The pulp passes through the screen plate above the good pulp chamber and enters the pulp outlet pipe 6 of the good pulp chamber. The pulp outlet pipe 6 is connected to the suction port of the pulp pump 7.

[0052] The entire process is operated through the DCS control system. The DCS control system connects the current data of the permanent magnet drive device and the liquid level signal and concentration signal configured in the tank body 1, and performs programming calculations, ultimately allowing the permanent magnet drive device to change speed according to the set liquid level changes and concentration changes.

[0053] At startup, the DCS control system first detects through signal feedback that the permanent magnet drive device is in a normal state and starts to energize. At the same time, after receiving the data signal of the liquid level and concentration of tank 1, the permanent magnet drive device outputs the corresponding speed. As the liquid level and concentration in tank 1 continue to change, the permanent magnet drive device will change speed accordingly. As a result, the crushing force and energy consumption of the entire pulping process are always in an energy balance state, and the best energy-saving state is achieved.

[0054] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A permanent magnet variable speed energy-saving pulper, comprising a tank body, a good pulp chamber part, a rotor part and a driving part, characterized in that: The driving part is a permanent magnet driving device, which includes a casing, a stator assembly, a rotor assembly, an output shaft, a bearing assembly and a water retaining ring. One end of the output shaft is installed with a water retaining ring located outside the casing; the rotor part is installed at the output shaft end of the permanent magnet driving device, and the rotor part is located above the good pulp chamber at the bottom of the tank body. The output shaft of the permanent magnet driving device passes through the good pulp chamber and is located at the bottom of the good pulp chamber; A spoiler is provided on one side of the tank body, the rotor part includes an impeller, the impeller includes a blade and a wing, and the wing is obliquely installed on one side of the blade; The cross section of the spoiler is a triangle, and the upper edge and the lower edge thereof approach the same vertex from the outside to the inside; The size of the cone gradually increases from the bottom cone surface and the top cone surface in radial direction inwards. The proportion of the upper edge portion of the spoiler to the entire spoiler is smaller than the proportion of the lower edge portion of the spoiler to the entire spoiler; The lower edge of the blade includes a wave portion and a straight portion, and the length of the wave portion is greater than the length of the straight portion; The wave portion includes three arc-shaped portions with arc directions opposite to each other; The upper edge of the blade includes an arc portion and a straight portion, and the straight portion is provided with a flying wing; It also includes a control module. A liquid level module and a concentration module are arranged in the tank body. The liquid level module, the concentration module and the permanent magnet drive device are respectively connected to the control module.

2. A permanent magnet variable speed energy-saving pulper as claimed in claim 1, characterized in that: A pulp outlet pipe is provided on one side of the good pulp chamber, and one side of the pulp outlet pipe is connected to a pulp pump.

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