Split type magnetic transmission long shaft stirrer

Abstract

The invention discloses a split type magnetic transmission long shaft stirrer, which belongs to the field of medium transmission, and comprises a power assembly, an inner transmission shaft assembly and a magnetic rotor assembly, the inner transmission shaft assembly comprises a fixed type driven transmission shaft system and a segmented combined type driving transmission shaft system, one end of the driving transmission shaft system is connected with the power assembly, and the other end of the driving transmission shaft system is connected with one end of the driven transmission shaft system through the magnetic rotor assembly; the driving transmission shaft system comprises at least two connected driving transmission parts. According to the long-shaft stirrer, high-precision transmission and leakage-free magnetic transmission of the multi-section combined detachable long shaft are achieved, the long-shaft stirrer can be suitable for different stirring depths, meanwhile, pollution of stirring media to the detachable upper transmission shaft assembly is eliminated, and the long-shaft stirrer has the advantages of being free of leakage, reliable in operation, safe to maintain, long in service life and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of medium stirring, and particularly relates to a split-type magnetic drive long-shaft stirrer. Background Art

[0002] At present, there are two forms of drive shaft sealing methods for fluid stirrers: magnetic sealing and mechanical sealing. Mechanical sealing is a dynamic seal, which seals the rotating shaft radially and axially through various forms of sealing rings. The sealing medium flows axially, but over time, leakage problems are likely to occur, causing pollution to the working environment and posing safety risks, and frequent maintenance is required. Magnetic sealing consists of a permanent magnet inner rotor, a permanent magnet outer rotor, and an isolation sleeve. The isolation sleeve seals the permanent magnet outer rotor and the medium outside the working cavity. The motor drives the permanent magnet inner rotor, and the permanent magnet inner rotor drives the permanent magnet outer rotor to rotate by using the magnetic coupling characteristic, achieving the purpose of torque transmission without contact and the static sealing effect. Magnetic sealing completely eliminates the leakage of the medium, overcomes the shortcomings of mechanical sealing, and in order to achieve leak-free sealing, it is necessary to adopt magnetic sealing. The magnetic drive stirrer solves the leakage problem of fluid stirring and is particularly suitable for the stirring of harmful and radioactive fluids. However, the current magnetic stirrers cannot achieve long-shaft stirring, and at the same time, it is also easy for the medium to enter the stirrer during the stirring process and damage the stirrer components.

[0003] For the stirring of harmful and radioactive media that require long-distance stirring, the current long-shaft drive stirrers adopt a segmented combined drive structure and a single-shaft drive form with mechanical sealing. This type of mechanical stirrer itself has leakage defects, making equipment maintenance and replacement have safety hazards, and leakage will pollute the surrounding environment. At the same time, there is also the problem that due to bearing wear, the long-shaft stirring shaft swings under harsh environments, reducing the operation reliability and service life of the equipment, and thus seriously affecting normal production. Summary of the Invention

[0004] The main purpose of the present invention is to provide a split-type magnetic drive long-shaft stirrer, which solves the problems of leakage risk and easy wear when the existing stirrer with mechanical sealing performs long-shaft stirring.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A split-type magnetic drive long-shaft stirrer includes a power assembly, an inner drive shaft assembly, and a magnetic rotor assembly;

[0006] The inner drive shaft assembly includes a fixed passive drive shaft system and a segmented combined active drive shaft system. One end of the active drive shaft system is connected to the power assembly, and the other end of the active drive shaft system and one end of the passive drive shaft system are connected through the magnetic rotor assembly;

[0007] The active drive shaft system includes at least two connected active drive components.

[0008] Further, the active transmission component includes a transmission shaft, the ends of two adjacent transmission shafts are connected, and the ends of the transmission shafts located at both ends of the active transmission shaft system are respectively connected to the power component and the magnetic rotor component.

[0009] Furthermore, the active transmission component further includes a support cylinder, the support cylinder is sleeved on the transmission shaft, and the support cylinder is used for limiting and protecting the transmission shaft.

[0010] Further, the active transmission shaft system further includes a support cylinder fixing seat, and the transmission shaft connected to the power component is installed in the support cylinder fixing seat and the support cylinder.

[0011] Furthermore, an alloy rolling bearing is installed in the support cylinder fixing seat, and the alloy rolling bearing is sleeved on the transmission shaft.

[0012] Further, the passive transmission shaft system includes a pump impeller shaft connected to the magnetic rotor component, and a pump impeller is arranged on the pump shaft.

[0013] Further, mounting seats are arranged at both ends of the pump impeller shaft, and an alloy sliding bearing assembly is arranged in the mounting seats, and the alloy sliding bearing assembly sleevedly supports the pump impeller shaft.

[0014] Further, the magnetic rotor component includes a separation sleeve and a magnetically coupled permanent magnet inner rotor and permanent magnet outer rotor, the separation sleeve covers the permanent magnet inner rotor, the permanent magnet inner rotor is connected to the active transmission shaft system, and the permanent magnet outer rotor is connected to the passive transmission shaft system.

[0015] Further, the long-shaft stirrer further includes an outer sleeve assembly, and the inner transmission component and the magnetic rotor component are arranged in the outer sleeve assembly.

[0016] Furthermore, the outer sleeve assembly includes an expansion joint, and the expansion joint is sleeved on the passive transmission shaft system.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The split-type magnetic drive long-shaft stirrer of the present invention realizes multi-section combined detachable long-shaft high-precision transmission and leak-free magnetic drive, solves the problems of radiation resistance and dry friction characteristics of bearings in harsh environments, and at the same time eliminates the pollution of the stirring medium to the detachable upper transmission shaft assembly. The long-shaft stirrer of the present invention has the advantages of leak-free, reliable operation, safe maintenance and long service life, is suitable for the working environment of stirring harmful and radioactive media, and can be applied in industries such as petroleum, chemical industry, pharmaceutical and environmental protection. Description of the Drawings

[0019] Figure 1 This is a schematic structural view of the split magnetic drive long shaft agitator of the present invention;

[0020] Figure 2 This is a schematic structural view of the magnetic rotor assembly of the split magnetic drive long shaft agitator of the present invention;

[0021] Figure 3 This is a schematic structural view of the inner drive shaft assembly of the split magnetic drive long shaft agitator of the present invention;

[0022] Figure 4 This is a schematic structural view of the active drive shaft system of the split magnetic drive long shaft agitator of the present invention;

[0023] Figure 5 This is a schematic structural view of the passive drive shaft system of the split magnetic drive long shaft agitator of the present invention;

[0024] Figure 6 This is a schematic structural view of the outer sleeve assembly of the split magnetic drive long shaft agitator of the present invention.

[0025] In the figure: 1. Motor, 2. Motor bracket, 3. Upper coupling, 4. Upper pressure plate, 5. Base, 6. Support cylinder fixing seat, 7. Sleeve fixing seat, 8. Upper drive shaft, 9. Upper support cylinder, 10. Upper sleeve, 11. Middle coupling, 12. Middle drive shaft, 13. Middle support cylinder, 14. Middle sleeve, 15. Lower coupling, 16. Lower drive shaft, 17. Lower support cylinder, 18. Positioning sleeve, 19. Lower pressure plate, 20. Permanent magnet inner rotor, 21. Isolation sleeve, 22. Permanent magnet outer rotor, 23. Lower sleeve, 24. Upper seat plate, 25. Upper bearing seat, 26. Upper alloy sliding bearing assembly, 27. Pump impeller shaft, 28. Expansion joint, 29. Lower bearing seat, 30. Lower alloy sliding bearing assembly, 31. Lower seat plate, 32. Cover plate, 33. Pump impeller, 34. Tank body. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Referring to the figure, the present application discloses a split magnetic drive long shaft agitator, including a power assembly, an inner drive shaft assembly, and a magnetic rotor assembly;

[0028] The inner transmission shaft assembly includes a fixed passive transmission shaft system and a segmented combined active transmission shaft system. One end of the active transmission shaft system is connected to the power assembly, and the other end of the active transmission shaft system and one end of the passive transmission shaft system are connected through the magnetic rotor assembly;

[0029] The active transmission shaft system includes at least two connected active transmission components.

[0030] In this application, the transmission system of the agitator is set as a split magnetic drive device combining a fixed passive transmission shaft system and a segmented combined active transmission shaft system, which is used for transmitting power, stirring the medium and sealing. The number of active transmission components of the active transmission shaft system can be adjusted according to actual needs for assembly, so as to adjust the length of the transmission system according to actual needs.

[0031] In this embodiment, the active transmission components are set to three, forming a three-stage transmission structure. Of course, it can be understood that the transmission components can be set to two, four or even more according to needs, and only need to be connected one by one for assembly.

[0032] In this embodiment, the power assembly includes a motor 1 and a motor bracket 2 for installing and fixing the motor 1. Of course, the power assembly is used to provide the initial power for transmission, and it can also be other power structures that can do work externally.

[0033] See Figure 2 , further, the magnetic rotor assembly of this application includes an isolation sleeve 21 and a magnetically coupled permanent magnet inner rotor 20 and permanent magnet outer rotor 22. The isolation sleeve 21 covers the permanent magnet inner rotor 21, the permanent magnet inner rotor 21 is connected to the active transmission shaft system, and the permanent magnet outer rotor 22 is connected to the passive transmission shaft system. Specifically, the permanent magnet inner rotor 20 and the permanent magnet outer rotor 22 are permanent magnet structures, and their outer surfaces are encapsulated with stainless steel outer coatings, avoiding contact between the permanent magnet outer rotor 22 and the external medium. The isolation sleeve 21 is a non-rotating part, and the isolation sleeve 21 completely isolates the permanent magnet inner rotor 20 from the permanent magnet outer rotor 22 and the external medium, realizing shaftless seal power transmission, changing dynamic seal into static seal to meet the requirement of leak-free transmission. The permanent magnet inner rotor 20 drives the permanent magnet outer rotor 22 to rotate through magnetic coupling characteristics, completing non-contact torque transmission. The low-heat-generating isolation sleeve 21 ensures the stable operation of the system magnetic force, achieving zero leakage of the external medium while improving the transmission efficiency.

[0034] See Figure 3 and Figure 4, Further, the three active transmission components of the active transmission shaft system in this embodiment are specifically the upper, middle, and lower transmission components. The three active transmission components include an upper transmission shaft 8, a middle transmission shaft 12, and a lower transmission shaft 16 that are connected in sequence. The axes of the three transmission shafts coincide and are connected as a whole to form a rotating component. The three transmission shafts are connected by a middle coupling 11 and a lower coupling 15. The upper transmission shaft 8 and the motor 1 are connected by an upper coupling 3. The permanent magnet inner rotor 20 is installed on the lower transmission shaft 16 by using a key and a nut. In this embodiment, the upper coupling 3 is a diaphragm coupling, and the middle coupling 11 and the lower coupling 15 are universal couplings. These couplings all have the function of compensating for the relative offset of the two shafts, thus ensuring the transmission accuracy and meeting the use requirements.

[0035] Correspondingly, the active transmission components further include an upper support cylinder 9, a middle support cylinder 13, and a lower support cylinder 17. The three support cylinders are correspondingly sleeved on the three transmission shafts. The support cylinder 9, the middle support cylinder 13, and the lower support cylinder 17 are connected as a whole to form a static support component, which is used to fix the three-stage transmission shaft and seal to prevent external media from entering the cavity of the support component.

[0036] Further, the active transmission shaft system further includes a support cylinder fixing seat 6. The support cylinder fixing seat 6 is fixedly connected to the motor bracket 2. The upper transmission shaft 8 is installed in the support cylinder fixing seat 6 and the upper support cylinder 9 by using alloy rolling bearings and snap rings. The middle transmission shaft 12 is installed in the middle support cylinder 13 by using alloy rolling bearings and snap rings. The lower transmission shaft 16 is installed in the lower support cylinder 17 by using alloy rolling bearings and snap rings. Further, the upper pressure plate 4 and the lower pressure plate 19 are respectively installed on the support cylinder fixing seat 6 and the lower support cylinder 17 by using screw connections to fix the alloy rolling bearings. The alloy rolling bearings supporting the three-stage transmission shaft in this embodiment have the characteristics of radiation resistance and dry friction. The active transmission shaft system is a detachable independent transmission unit, which is convenient for maintenance and replacement of the drive components.

[0037] See Figure 5 , Further, the passive transmission shaft system is a shaft system structure supported by two-point alloy sliding bearing components, which is a fixed passive transmission shaft assembly and a fixed independent transmission working unit. It specifically includes a pump wheel shaft 27 connected to the permanent magnet outer rotor 22, and a pump wheel 33 is arranged on the pump wheel shaft 27. When the permanent magnet inner rotor 20 drives the permanent magnet outer rotor 22 to rotate, the permanent magnet outer rotor drives the pump wheel shaft 27 and the pump wheel 33 on the pump wheel shaft 27 to rotate, thereby realizing the transmission of the medium.

[0038] Further, mounting seats are provided at both ends of the pump impeller shaft. Specifically, the mounting seats in this embodiment include an upper seat plate 24 and an upper bearing seat 25 that cooperate with each other, as well as a lower bearing seat 29 and a lower seat plate 31. Upper alloy sliding bearing assemblies 26 and lower alloy sliding bearing assemblies 30 are correspondingly arranged in the two mounting seats. The alloy sliding bearing assemblies are composed of radial alloy sliding bearings and axial alloy thrust bearings, and the alloy sliding bearing assemblies are sleeved to support the pump impeller shaft 27. In this embodiment, the upper seat plate 24 and the lower seat plate 31 are fixed to the upper part of the pump impeller shaft 27 by key connection, the upper bearing seat 25 and the lower bearing seat 29 are fixed to the lower part of the pump impeller shaft 27 by alloy sliding bearing connection, and the permanent magnet outer rotor 22, the pump impeller 33 and the upper and lower alloy sliding bearing assemblies are fixed to the pump impeller shaft 27 by nut and key connection. The pump impeller 33 is a turbine-type impeller and has a detachable structure with the pump impeller shaft 27. The shafting supported by the two-point alloy sliding bearing assemblies of this application can withstand the axial force and radial force generated by the irregular movement of the medium, ensure the balance of the axial force under various working conditions, greatly eliminate the influence of the working load on the shafting, extend the working life of the shafting, and ensure the transmission accuracy of the pump impeller shaft 27 and the stability and safety of the system operation.

[0039] See Figure 6 , further, the long-shaft agitator of this application further includes an outer sleeve assembly, and the inner transmission assembly and the magnetic rotor assembly are arranged in this outer sleeve assembly. The outer sleeve assembly is an outer protection and support component, which has the functions of fixing the passive transmission shafting, positioning the active transmission shafting, and sealing the external medium.

[0040] Specifically, the outer sleeve assembly in this embodiment includes a sleeve fixing seat 7, a positioning sleeve 18, and upper sleeves 10, middle sleeves 14, and lower sleeves 23 corresponding to the upper, middle, and lower transmission components. In this embodiment, the sleeve fixing seat 7 and the upper sleeve 10 are integrally connected by screw and seal ring connection, the upper sleeve 10 and the middle sleeve 14 are integrally connected by screw and seal ring connection, the positioning sleeve 18 and the middle sleeve 14 are integrally connected by screw connection, and the positioning sleeve 18 radially positions the lower support cylinder 17 to ensure the accurate radial position of the lower end of the active transmission shafting, greatly reducing the influence of vibration on the magnetic rotor assembly; the middle sleeve 14 and the lower sleeve 23 are integrally connected by screw and seal ring connection, and the sleeve fixing seat 7, the upper sleeve 10, the middle sleeve 14, and the lower sleeve 23 together form a radially sealed cylindrical component to prevent harmful radial media from entering the cavity of the outer sleeve assembly and polluting the inner transmission shaft assembly and the magnetic rotor assembly.

[0041] Furthermore, the outer sleeve assembly includes an expansion joint 28, and the expansion joint 28 is sleeved and fixed on the lower sleeve 23. The expansion joint 28 has a floating support function to buffer the axial force and radial force generated by the irregular movement of the medium, avoid vibration of the outer sleeve assembly caused thereby, effectively protect the stability of the long-shaft transmission, and seal the tank body 34 to prevent internal medium from leaking.

[0042] This application also includes a base 5, on which the long-axis agitator is fixedly arranged. The base 5 provides an installation base for the agitator of this application to ensure its stable operation.

[0043] Specifically, in this embodiment, screws are used to connect the support cylinder fixing seat 6 and the sleeve fixing seat 7, as well as the isolation sleeve 21 and the lower sleeve 23 respectively, so that the inner transmission shaft assembly and the outer sleeve assembly are installed as a whole to form a split-type magnetic drive long-axis agitator. The sleeve fixing seat 7 and the base 5 are connected into one body by screws to achieve the function of fixing the upper end, and the lower end of the expansion joint 28 and the tank body 34 are connected into one body by sealed welding to achieve the function of fixing the lower end, and at the same time prevent the medium from leaking outside the tank body 34. Its connection with the base 5 and the tank body 34 determines the working position.

[0044] During operation, the upper end of the long-axis agitator of this application is connected to the base 5 of the equipment room, and the lower end is sealed and welded to the tank body 34 to complete the working positioning of the equipment. The motor 1 is started, and the three-stage transmission shaft of the active transmission shaft system is driven to rotate by the motor 1 through the upper coupling 3, so as to drive the permanent magnet inner rotor 20 to rotate at a high speed. Since there is a magnetic field between the permanent magnet inner rotor 20 and the permanent magnet outer rotor 22, the permanent magnet inner rotor 20 drives the permanent magnet outer rotor 22 outside the isolation sleeve 21 to rotate synchronously through the magnetic coupling characteristic, and then drives the pump impeller shaft 27 of the lower transmission shaft assembly to rotate, so as to transmit the torque of the motor 1 to the pump impeller 33 without contact. The pump impeller 33 rotates to do work on the medium, sucking the medium axially and discharging it radially. The sealing rings of the support components and the sealing function of the isolation sleeve 21 can prevent external media from entering the cavity of the active transmission shaft system, ensuring the safety, reliability and no leakage during the disassembly and assembly of the active transmission shaft system. When overloaded, the permanent magnet inner rotor 20 and the permanent magnet outer rotor 22 slip relative to each other, playing a protective role for the motor 1.

[0045] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A split magnetic drive long shaft agitator, characterized in that, It includes a power component, an inner transmission shaft component, and a magnetic rotor component; The inner transmission shaft component includes a fixed passive transmission shaft system and a segmented combined active transmission shaft system. One end of the active transmission shaft system is connected to the power component, and the other end of the active transmission shaft system and one end of the passive transmission shaft system are connected through the magnetic rotor component; The active transmission shaft system includes at least two connected active transmission components.

2. The split magnetic drive long shaft agitator according to claim 1, characterized in that, The active transmission component includes a transmission shaft. The ends of two adjacent transmission shafts are connected. The ends of the transmission shafts at both ends of the active transmission shaft system are respectively connected to the power component and the magnetic rotor component.

3. The split magnetic drive long shaft agitator according to claim 2, wherein, The active transmission component further includes a support cylinder. The support cylinder is sleeved on the transmission shaft, and the support cylinder is used for limiting and protecting the transmission shaft.

4. The split magnetic drive long shaft agitator according to claim 3, characterized in that, The active transmission shaft system further includes a support cylinder fixing seat. The transmission shaft connected to the power component is installed in the support cylinder fixing seat and the support cylinder.

5. The split magnetic drive long shaft agitator according to claim 4, wherein, An alloy rolling bearing is installed in the support cylinder fixing seat, and the alloy rolling bearing is sleeved on the transmission shaft.

6. The split magnetic drive long shaft agitator according to claim 1, wherein, The passive transmission shaft system includes a pump impeller shaft connected to the magnetic rotor component, and a pump impeller is arranged on the pump shaft.

7. The split magnetic drive long shaft agitator according to claim 6, characterized in that, Mounting seats are arranged at both ends of the pump impeller shaft, and an alloy sliding bearing assembly is arranged in the mounting seats. The alloy sliding bearing assembly sleevedly supports the pump impeller shaft.

8. The split magnetic drive long shaft agitator according to claim 1, characterized in that, The magnetic rotor component includes an isolation sleeve and a magnetically coupled permanent magnet inner rotor and permanent magnet outer rotor. The isolation sleeve covers the permanent magnet inner rotor. The permanent magnet inner rotor is connected to the active transmission shaft system, and the permanent magnet outer rotor is connected to the passive transmission shaft system.

9. The split magnetic drive long shaft agitator according to claim 1, wherein The long-shaft agitator further includes an outer sleeve component, and the inner transmission component and the magnetic rotor component are arranged in the outer sleeve component.

10. The split magnetic drive long shaft agitator according to claim 9, wherein, The outer sleeve component includes an expansion joint, and the expansion joint is sleeved on the passive transmission shaft system.

Images