A stirring assembly and a stirrer
By connecting the integrally molded stirring blades with fastening components, the problems of cumbersome installation and short service life of traditional welded structures are solved, enabling efficient, stable, and low-cost mass production of the stirrer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHEJIANG GREATWALL MIXERS CO LTD
- Filing Date
- 2026-02-02
- Publication Date
- 2026-06-16
AI Technical Summary
The welded structure of traditional turbine agitators results in cumbersome installation, short service life, high cost, poor blade angle consistency, and lack of versatility, making it difficult to meet the needs of large-scale production.
The agitator blades are connected to the fastening components in one piece. They are formed by cutting and pressing plates of equal thickness, which allows for detachable installation of the agitator blades, eliminates stress concentration, and adapts to different blade shape requirements.
It simplifies the installation process of the stirring blades, improves product reliability and service life, reduces inventory pressure and costs, and ensures the stability and efficiency of the stirring process.
Smart Images
Figure CN121607052B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mixing technology, and in particular to a mixing assembly and agitator. Background Technology
[0002] As a core piece of equipment in fluid mixing processes in industries such as chemical, pharmaceutical, food, and environmental protection, the structural design and manufacturing process of open-type turbine agitators directly affect production efficiency, product quality, and operation and maintenance costs. Traditional open-type turbine agitators generally adopt a welded structure of "blades + connecting plate + hub," which has several inherent drawbacks in long-term application:
[0003] (i) The multi-leaf welding process results in a larger overall diameter of the product. Due to the limitations of the container manhole size, the equipment installation, disassembly and maintenance process is complicated, which greatly increases the user's operation and maintenance costs.
[0004] (ii) The welding process is prone to defects such as porosity and cracks, which pose quality risks such as insufficient strength and short service life. In addition, manual welding operation leads to poor product dimensional accuracy and blade angle consistency, affecting the stability of the stirring process and the mixing effect. At the same time, the welding method will cause stress concentration at the connection position between the blade and the hub, and at the connection position between the hub and the agitator shaft. As a result, the blade may fail due to the turbulent disturbance it experiences during the actual operation of the agitator.
[0005] (iii) The production process is complicated, the blade angle depends on manual adjustment, the mounting holes are processed using traditional methods with low precision, and the overall production cycle is long, making it difficult to meet the needs of large-scale production and rapid delivery.
[0006] (iv) Different blade types, such as 2-blade and 4-blade products, have large differences in blade structure and cannot be used interchangeably. The development cycle of non-standard product spare parts is long and the inventory pressure is high, resulting in high spare parts costs for users. Summary of the Invention
[0007] One objective of this application is to provide a stirring assembly that can solve at least one of the defects in the aforementioned background art.
[0008] Another object of this application is to provide a stirrer that can solve at least one of the defects in the above-mentioned background art.
[0009] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a stirring assembly is disposed at a stirring station on a drive shaft; the stirring assembly includes at least one stirring blade and a fastening assembly; the stirring blade includes an integrally formed connecting seat and at least one blade, and multiple stirring blades are stacked and aligned axially through the connecting seat; the fastening assembly is adapted to detachably and fix the connecting seat of the stirring blade to the drive shaft; each stirring station requires at least two blades, and multiple blades are arranged at equal intervals along the circumferential direction of the drive shaft.
[0010] Preferably, the stirring blade is obtained by pressing the blade after cutting a plate of equal thickness.
[0011] Preferably, the number of blades integrally formed in a single stirring blade is less than or equal to four, and the interval angle between adjacent blades along the circumferential direction of the connecting seat is greater than or equal to 90°.
[0012] Preferably, the mixing station is equipped with a plurality of mixing blades, and each mixing blade is integrally formed with one blade.
[0013] Preferably, when the number of blades required for the mixing station is less than or equal to four, the mixing station is equipped with one mixing blade, and the mixing blade is integrally formed with all the blades required for the mixing station.
[0014] Preferably, when the number of blades required for the stirring station is odd and greater than four, the stirring station is equipped with multiple stirring blades, and the number of blades integrally formed for each stirring blade is not exactly the same.
[0015] Preferably, when the number of blades required for the stirring station is even, the number of stirring blades installed is at least one, and the number of blades integrally formed by the stirring blades is even.
[0016] Preferably, when the number of blades required for the stirring station is even, the number of integrally formed stirring blades used is two, and the two blades are arranged at 180° intervals around the connecting seat.
[0017] Preferably, for the multiple stirring blades installed at the stirring station, the distance from the blade to the connecting seat is different for each stirring blade, so that when the multiple stirring blades are installed, the height of the corresponding blades is consistent.
[0018] Preferably, the stirring blade is suitable for being obtained by casting.
[0019] Preferably, the stirring station is located at the end of the drive shaft, and the connecting seat is provided with a plurality of connecting holes arranged at equal intervals along the circumference; the fastening assembly includes a plurality of bolts, which pass through the connecting holes on the connecting seat and are threaded into threaded holes corresponding to the end face of the drive shaft.
[0020] Preferably, the stirring station is located at the end of the drive shaft, and the connecting seat has a through hole at its center, through which the connecting seat is fitted onto the drive shaft; the side of the connecting seat has a plurality of first connecting holes arranged at equal intervals along the circumferential direction; the fastening assembly includes a flange seat, a plurality of first bolts and a plurality of second bolts; the center of the flange seat has a plurality of fixing holes, through which the second bolts pass and threadedly engage with the threaded holes corresponding to the end face of the drive shaft; the outer side of the flange seat has a plurality of third connecting holes arranged at equal intervals along the circumferential direction, the third connecting holes being aligned with the first connecting holes, so that the first bolts pass through the corresponding first connecting holes and the third connecting holes for fastening; wherein, the number of fixing holes is less than the number of third connecting holes.
[0021] Preferably, the stirring station is located at the shaft segment of the drive shaft, and the connecting seat has a through hole at its center, through which the connecting seat is sleeved and installed on the drive shaft; the side of the connecting seat has a plurality of first connecting holes arranged at equal intervals along the circumferential direction; the fastening assembly includes a detachable flange assembly and a plurality of bolts; the flange assembly is installed on the side of the stirring station along the axial direction of the drive shaft, and the flange assembly and the drive shaft are relatively fixed and limit-fitted; the side of the flange assembly has a second connecting hole aligned with the first connecting hole; the bolts are adapted to pass through the corresponding first connecting hole and second connecting hole and be fastened.
[0022] Preferably, two flange assemblies are provided, and the two flange assemblies are respectively installed on both sides of the mixing station along the axial direction of the drive shaft, and each flange assembly is relatively fixed and limited to the drive shaft.
[0023] Preferably, the drive shaft is provided with a plurality of limiting grooves at equal intervals in the circumferential direction; the flange assembly includes a plurality of flange blocks, each flange block is provided with a limiting block on its radial inner side, and each flange block is provided with at least one second connecting hole on its end face; the flange blocks are circumferentially and axially limited and engaged with the corresponding limiting grooves through the limiting blocks, and all the flange blocks are arranged at equal intervals along the circumferential direction of the drive shaft.
[0024] Preferably, the drive shaft is provided with an annular groove on the side of the mixing station; the inner side of the flange block is arc-shaped to correspond to the groove, so that the flange block and the groove are axially limited and engaged.
[0025] Preferably, there are two flange blocks, both of which are semi-circular in structure; each flange block has a plurality of second connecting holes on its end face, and a limiting block is provided in the middle of the inner side of each flange block.
[0026] A stirrer includes a drive shaft and the aforementioned stirring assembly, wherein a stirring station is provided on the drive shaft and the stirring assembly is installed at the stirring station.
[0027] Preferably, the drive shaft is provided with a plurality of stirring stations along the axial direction, and each stirring station is equipped with a stirring assembly; the number of blades corresponding to the stirring assembly installed at each stirring station may be the same or not completely the same.
[0028] Compared with the prior art, the beneficial effects of this application are as follows:
[0029] (1) This application changes the installation method of the stirring blade from welding to fastening connection, so that the installation process of the stirring blade can be carried out inside the reactor, thereby avoiding the problem of complicated installation of the stirring blade caused by the limitation of the manhole size of the container.
[0030] (2) The stirring blades are manufactured using an integrated molding process to avoid defects such as porosity, cracks, and deformation caused by welding; ensuring the strength consistency and dimensional accuracy of each stirring blade, fundamentally improving the reliability and service life of the product.
[0031] (3) The connection between the stirring blade and the drive shaft is achieved by a mechanical fastening assembly, which can eliminate the stress concentration problem inherent in the connection of the traditional welding method and greatly improve the fatigue resistance of the component under alternating load.
[0032] (4) The mechanical connection between the integrally formed stirring blade and the drive shaft makes it possible to install the stirring blade without relying on manual angle adjustment and welding, which can significantly shorten the production cycle and ensure the stability of product quality.
[0033] (5) Based on the combination of different numbers of stirring blades, different scenarios with different blade number requirements can be realized; compared with the traditional method, the stirring blade structure under different blade types can be universal, thereby reducing inventory pressure and cost. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the stirring assembly installed on the drive shaft in this application.
[0035] Figure 2 For this application Figure 1 A schematic diagram showing the disassembled state of the mixing components corresponding to a single mixing station.
[0036] Figure 3 This is a schematic diagram of one example of an integrally formed double-blade stirring blade in this application.
[0037] Figure 4 This is a schematic diagram of the structure of the integrally formed single-blade stirring blade in this application.
[0038] Figure 5 This is a schematic diagram of the structure of the one-piece molded three-blade stirring blade in this application.
[0039] Figure 6 This is a schematic diagram of another example of the integrally formed double-blade stirring blade in this application.
[0040] Figure 7 This is a schematic diagram of the structure of the five-blade stirring assembly in this application.
[0041] Figure 8 This is a schematic diagram of the six-blade stirring assembly in this application.
[0042] Figure 9 This is a schematic diagram showing the state of the blank after cutting, which is ready for pressing in this application.
[0043] Figure 10 This is a schematic diagram showing the state in which the blank is pressed into a blade by a pressing die in this application.
[0044] Figure 11 This is a schematic diagram of one example of the flange assembly in this application.
[0045] Figure 12 This is a structural schematic diagram of another example of the flange assembly in this application.
[0046] Figure 13 This is a partial structural schematic diagram of one example of the drive shaft in this application.
[0047] Figure 14 This is a partial structural schematic diagram of another example of the drive shaft in this application.
[0048] Figure 15 This is a schematic diagram of the cross-sectional structure of the drive shaft on the mixing station side in this application.
[0049] Figure 16 This is a schematic diagram of the installation structure of one example of the stirring assembly installed at the end of the drive shaft in this application.
[0050] Figure 17This is an exploded view of another example of the stirring assembly installed at the end of the drive shaft in this application.
[0051] In the figure: blank 01, first part 011, second part 012, upper mold 02, upper pressing cavity 021, lower mold 03, lower pressing cavity 031, stirring assembly 1, stirring blade 11, blade 111, connecting seat 112, first connecting hole 1120, through hole 1121, flange assembly 12, second connecting hole 120, flange block 121, limiting block 122, bolt 13, first bolt 131, second bolt 132, flange seat 14, third connecting hole 140, fixing hole 141, drive shaft 2, stirring station 21, slot 22, limiting groove 23. Detailed Implementation
[0052] The present application will now be further described in conjunction with specific embodiments. It should be noted that, in the description of this specification, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.
[0053] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.
[0054] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0055] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0056] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0057] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.
[0058] One aspect of this application provides a stirring assembly, such as Figure 1 and Figure 2 As shown, the stirring assembly 1 is disposed at a stirring station 21 on the drive shaft 2. A preferred embodiment of the stirring assembly 1 includes at least one stirring blade 11 and a fastening assembly. The stirring blade 11 includes an integrally formed connecting seat 112 and at least one blade 111. Depending on the number of blades 111, a single stirring station 21 may require only one stirring blade 11 or may require multiple stirring blades 11. When multiple stirring blades 11 need to be installed in a single stirring station 21, the multiple stirring blades 11 are stacked and axially aligned via the connecting seat 112. The fastening assembly can detachably and securely connect the connecting seat 112 of the stirring blade 11 to the drive shaft 2, allowing the blades 111 of the stirring blade 11 to stir the fluid in the reactor under the rotational drive of the drive shaft 2. It should be noted that to ensure the stability of the stirring, at least two blades 111 are required for each stirring station 21, and the multiple blades 111 are arranged at equal intervals along the circumferential direction of the drive shaft 2.
[0059] Understandably, the traditional method of installing the stirring assembly 1, especially in large reactor scenarios, often involves first welding the stirring blades 11 to the drive shaft 2 on the ground according to the angle, spacing, and direction specified in the drawings. Then, a lifting device is used to hoist the welded and assembled stirring assembly 1 to a vertical position. Maintaining the vertical position of the stirring assembly 1 requires careful lowering through the manhole or dedicated lifting opening at the top of the reactor. Since the unfolded dimensions of the stirring blades 11 are approximately the same as the diameter of the manhole, personnel may need to be stationed inside the reactor to guide them during this process to avoid collisions between the stirring blades 11 and internal components. If the unfolded dimensions of the stirring blades 11 are larger than the diameter of the manhole, personnel must be stationed inside the reactor to weld the stirring blades 11 to the drive shaft 2. Due to the limited space inside the reactor, this welding work is labor-intensive and inconvenient. Based on the above, it is clear that the traditional welding-based installation process for the stirring assembly 1 is quite complex.
[0060] In the technical solution of this application, the installation method of the stirring blade 11 is changed from welding to a fastening connection. Therefore, when installing the stirring assembly 1, the stirring blade 11 only needs to be placed into the reactor beforehand, making the placement process of a single stirring blade 11 relatively easy and simple. Then, the operator only needs to detachably fix the stirring blade 11 to the drive shaft 2 inside the reactor using the fastening assembly. Based on the fastening assembly connection method, the installation space requirements are not large, ensuring that the operator can easily complete the installation of the stirring blade 11, avoiding the problem of complicated installation caused by the size limitation of the container manhole. Furthermore, the connection between the stirring blade 11 and the drive shaft 2 is achieved through a mechanical fastening assembly, which eliminates the stress concentration problem inherent in traditional welding methods at the connection point, greatly improving the fatigue resistance of the component under alternating loads.
[0061] Meanwhile, in the technical solution of this application, the stirring blade 11 is manufactured using an integral molding process, which avoids defects such as porosity, cracks, and deformation caused by traditional welding methods; it ensures the consistency of strength and dimensional accuracy of each stirring blade 11, fundamentally improving the reliability and service life of the product. Furthermore, the mechanical connection between the integrally molded stirring blade 11 and the drive shaft 2 eliminates the need for manual angle adjustment and welding during the installation of the stirring blade 11, significantly shortening the production cycle while ensuring stable product quality.
[0062] Meanwhile, the blade shape of the stirring component 1 varies depending on the application scenario, meaning the number of blades 111 required for the stirring component 1 differs. For example, the two-blade and four-blade types require two and four blades 111 respectively. Traditional methods, based on the different numbers of blades 111, result in significant structural differences between the two blade shapes, making universality impossible. However, in the technical solution of this application, the stirring blades 11, based on a standardized modular design, only require adjustment of the number of stirring blades 11 to meet different blade shape requirements.
[0063] In this embodiment, there are several methods for integrally molding the stirring blade 11, such as casting and pressing. For casting, it is only necessary to design a mold cavity that meets the structural requirements, and then inject molten metal into the mold cavity for cooling and molding. The specific molding principle is well-known to those skilled in the art, and therefore will not be described in detail here. For pressing, such as... Figure 9 and Figure 10 As shown, the blank 01 of the stirring blade 11 can be cut from a sheet of equal thickness by wire cutting or punching. The blank 01 includes a first part 011 corresponding to the connecting seat 112 and a second part 012 corresponding to the blade 111. Then, the obtained blank 01 is placed in a special pressing device and the second part 012 is pressed by a pressing mold. The pressing mold of the special pressing device mainly includes an upper pressing mold 02 and a lower pressing mold 03; an upper pressing cavity 021 is provided on one side of the upper pressing mold 02, and a lower pressing cavity 031 is provided on one side of the lower pressing mold 03; the upper pressing cavity 021 and the lower pressing cavity 031 can cooperate to form an inclined or vertical pressing cavity. When pressing the blade 111, as follows... Figure 9 As shown, the upper die 02 and the lower die 03 are in a separated state. At this time, the second part 012 of the blank 01 can be placed between the upper die 02 and the lower die 03; then as shown... Figure 10 As shown, by closing the upper mold 02 and the lower mold 03, the second part 012 of the blank 01 is tilted to the corresponding angle of the required blade 111, and finally the required stirring blade 11 is obtained.
[0064] It is understandable that, considering the need for mold design and secondary processing of the casting after mold opening, the production efficiency of the stirring blade 11 is lower compared to that of compression molding. Therefore, in this embodiment, compression molding is preferred for the integral molding of the stirring blade 11. The tilt angle of the blade 111 obtained by compression molding can meet the requirements of 0~90°. That is, the blade 111 obtained by compression molding can not only meet the requirements of the inclined blade structure, but also the requirements of the straight blade structure; the specific structural requirements of the blade 111 can be selected by those skilled in the art according to their actual needs.
[0065] In this embodiment, for different application scenarios of different blade types, the number of blades 111 integrally formed by the stirring blade 11 of the stirring assembly 1 varies, resulting in multiple installation methods; for ease of understanding, two specific examples will be used to describe this in detail below.
[0066] Example 1: For scenarios where the required number of blades 111 for the mixing station 21 is odd, the number of blades 111 integrally formed by the mixing blades 111 can be odd.
[0067] Specifically, common scenarios where the number of blades 111 required for a mixing station 21 is odd include three-blade and five-blade configurations. For example... Figure 4 As shown, for a three-blade scenario, the number of integrally formed blades 111 of the stirring blade 11 can be one, in which case the entire stirring assembly 1 requires three stirring blades 11 stacked together. For a five-blade scenario, the number of integrally formed blades 111 of the stirring blade 11 can also be one, in which case the entire stirring assembly 1 requires five stirring blades 11 stacked together.
[0068] It is important to note that since each stirring blade 11 is manufactured using the same molding process, the tilt angle and axial height of each blade 111 are consistent. Therefore, when multiple stirring blades 11 are stacked axially, there will be a height difference between adjacent blades 111 in the axial direction. This height difference is specifically the thickness of the stirring blade 11. In scenarios where multiple stirring blades 11 are stacked, this height difference between adjacent blades 111 may cause slight disturbances and imbalances. Therefore, to improve the operational stability of the stirring assembly 1, for scenarios where a large number of blades 111 are required for the stirring station 21, such as a five-blade configuration, the stacking of single blades 111 of multiple stirring blades 111 can only be used when the tilt angle of the blades 111 is required to be large. This ensures that the overlapping area of the projected region of all blades 111 in the circumferential direction is at least 50% of the projected area of a single blade 111 in the circumferential direction.
[0069] In this embodiment, in order to further suppress the disturbance imbalance that may be caused by the height difference between adjacent blades 111, the forming method of the stirring blade 11 can be improved. For ease of understanding, two specific solutions will be described in detail below.
[0070] Option 1: When the stirring blade 11 is formed into a single blade 111 by pressing, the blades 111 of different stirring blades 11 are raised to different degrees. Taking a three-blade scenario as an example, the height between the blade 111 of one stirring blade 11 and the connecting seat 112 is used as a reference. When pressing the blades 111 of the other two stirring blades 11, the height is raised by one and two times the thickness, respectively. Thus, when the stirring blades 11 are stacked and installed based on the connecting seat 112, they are sequentially nested according to the different heights of the blades 111, so that the final heights of the three blades 111 corresponding to the three stirring blades 11 are consistent.
[0071] Option 2: All the blades 111 required for the mixing station 21 are integrally formed using a single mixing blade 11. Taking a three-blade configuration as an example... Figure 5 As shown, three blades 111 can be directly formed on one stirring blade 11, meaning that the blade shape requirements can be met with just a single stirring blade 11.
[0072] It should be noted that Schemes 1 and 2 are well-suited for scenarios where the number of blades 111 required for the mixing station 21 is small. However, for scenarios requiring a large number of blades 111, such as a five-blade configuration, Scheme 1 results in a height difference of up to four times the thickness between the pressed blades 111 of two of the mixing blades. This could lead to excessively different structural deformations at the transition connection between the two mixing blades 111 and the connecting seat 112, thus affecting the balance of the mixing performance of the two mixing blades 111. In Scheme 2, to ensure no interference between adjacent blades 111 during the pressing process, the interval angle between adjacent blades 111 along the circumferential direction of the connecting seat 112 must be no less than 90°. Therefore, when using one mixing blade 11 to directly form five blades 111, the interval angle between adjacent blades 111 is 72°, which may cause interference during the pressing process.
[0073] Therefore, for scenarios where the number of blades 111 required for the mixing station 21 is relatively large, a combination of Scheme 1 and Scheme 2 can be adopted; taking a five-blade scenario as an example, such as Figure 6 As shown, a stirring blade 11 with two integrally formed blades 111 can be obtained first using method two; this is referred to as the first stirring blade. It should be noted that the circumferential spacing angle between the two blades 111 in the first stirring blade is 144°. Then, as... Figure 7As shown, the first stirring blade and three integrally formed second stirring blades with one blade 111 are stacked together. The height of the first stirring blade 111 relative to the connecting seat 112 and the height of the second stirring blade 111 relative to the connecting seat 112 can be raised in one way. For example, based on the height of the first stirring blade 111 relative to the connecting seat 112, the height of the second stirring blade 111 relative to the connecting seat 112 is raised by one thickness. Thus, when the first stirring blade and the second stirring blade are stacked, it can be ensured that the installation height of the first stirring blade and the second stirring blade 111 is consistent.
[0074] Example 2: When the number of blades 111 required for the mixing station 21 is even, the number of blades 111 integrally formed by the mixing blades 111 is even.
[0075] Specifically, common scenarios where the number of blades 111 required for a mixing station 21 is even include two-blade, four-blade, and six-blade scenarios. For example... Figure 3 As shown, for a two-blade scenario, the number of integrally formed blades 111 of the stirring blade 11 can be two, and the two blades 111 are arranged at 180° intervals around the connecting seat 112; then the entire stirring assembly 1 only needs one stirring blade 11 to meet the requirements. For a four-blade scenario, the number of integrally formed blades 111 of the stirring blade 11 can also be two, then the entire stirring assembly 1 needs two stirring blades 11 stacked together. For a six-blade scenario, as... Figure 8 As shown, the number of blades 111 integrally formed by the stirring blade 11 can also be two, in which case the entire stirring assembly 1 requires three stirring blades 11 stacked together.
[0076] It should be noted that for two-blade scenarios, two integrally formed stirring blades 11, each with one blade 111, can be stacked together. Furthermore, the height of the blades 111 formed by these two stirring blades 11 relative to the corresponding connecting seat 112 can be adaptively raised. For four-blade and six-blade scenarios, a corresponding number of integrally formed stirring blades 11, each with one blade 111, can also be stacked together.
[0077] However, as the analysis above shows, in scenarios where multiple stirring blades 11 are stacked, the height difference between adjacent blades 111 may cause slight disturbance and imbalance. Therefore, for a four-blade scenario, it is preferable to stack two integrally formed stirring blades 111 with two blades each; or, an integrally formed stirring blade 11 with four blades 111 can be used directly. For a six-blade scenario, if one stirring blade 11 is used to directly form six blades 111, interference may occur during the pressing and forming of the blades 111 due to the small interval angle between adjacent blades 111 (less than 90°). Therefore, for a six-blade scenario, it is preferable to stack three integrally formed stirring blades 111 with two blades each, or to stack two integrally formed stirring blades 111 with three blades each.
[0078] It should be noted that when multiple integrally formed stirring blades 111 are stacked, the circumferentially spaced blades 111 of each stirring blade 11 allow each stirring blade 11 to achieve balance during rotation. Therefore, the disturbance imbalance caused by the height difference between adjacent stirring blades 11 can be effectively suppressed. Alternatively, the solution in Example 1 can be used to raise the blades 111 of different stirring blades 11 installed at the stirring station 21 to different degrees during pressing, ensuring that the blades 111 maintain a consistent height after installation.
[0079] In this embodiment, the specific method by which the stirring blade 11 is connected to the drive shaft 2 via the fastening assembly varies depending on the location of the stirring station 21. Specifically, since the thickness of the connecting seat 112 on the stirring blade 11 is the same as the thickness of the blade 111, the connecting seat 112 and the drive shaft 2 can only be fixed axially, and cannot or is difficult to fix radially. Regarding the axial fixing of the connecting seat 112 and the drive shaft 2, if the stirring station 21 is located at any segment of the drive shaft 2, the stirring blade 11 needs to be sleeved with the drive shaft 2 via the connecting seat 112. This makes it impossible for the drive shaft 2 itself to have the conditions for axial connection with the connecting seat 112. Therefore, the connection with the drive shaft 2 via the fastening assembly is required to provide the conditions for axial connection with the stirring blade 11. If the stirring station 21 is located at the end of the drive shaft 2, since the end face of the drive shaft 2 can provide the conditions for axial connection with the stirring blade 11, the fastening assembly only needs to provide a fastening connection. For ease of understanding, the specific structures for connecting the stirring blade 11 and the drive shaft 2 via fastening components in the two scenarios will be described in detail below.
[0080] 1. For scenarios where the mixing station 21 is located at any position on the drive shaft 2.
[0081] In this embodiment, as Figures 3 to 5 As shown, the connecting seat 112 has a through hole 1121 at its center, so that when installing the stirring blade 11, the connecting seat 112 of the stirring blade 11 can be sleeved and installed on the drive shaft 2 through the through hole 1121; the side of the connecting seat 112 has a plurality of first connecting holes 1120 arranged at equal intervals along the circumferential direction. Figure 2 , Figure 11 and Figure 12 As shown, the fastening assembly includes a flange assembly 12 and multiple bolts 13. The flange assembly 12 has a detachable structure, so when installing the mixing assembly 1, the mixing blade 11 can be first fitted onto the corresponding mixing position 21 of the drive shaft 2 through the through hole 1121 on the connecting seat 112. Then, the flange assembly 12 can be disassembled and installed on the side of the corresponding mixing position 21 on the drive shaft 2. At this time, the flange assembly 12 can be circumferentially and axially limited with the drive shaft 2. At the same time, the second connecting bolt on the flange assembly 12... The connecting hole 120 can be aligned with the first connecting hole 1120 on the connecting seat 112. Then, each bolt 13 is passed through the corresponding first connecting hole 1120 and second connecting hole 120 and tightened. This restricts the separability of the flange assembly 12 in the radial direction by the connecting seat 112. At the same time, the flange assembly 12 and the drive shaft 2 are matched in the circumferential and axial directions to ensure that the stirring blade 11 can be relatively fixed with the drive shaft 2. This allows the stirring blade 11 to rotate synchronously with the drive shaft 2 to stir the fluid.
[0082] For the fastening connection of bolt 13 to flange assembly 12 and connecting seat 112, the first connecting hole 1120 and the second connecting hole 120 can be threaded holes, and bolt 13 can be threaded and tightened simultaneously as it passes through the first connecting hole 1120 and the second connecting hole 120. Alternatively, the first connecting hole 1120 and the second connecting hole 120 can be through holes, and bolt 13 can be tightened by screwing in a nut after passing through the first connecting hole 1120 and the second connecting hole 120.
[0083] It should be noted that for each mixing station 21, only one flange assembly 12 needs to be installed along the axial direction of the drive shaft 2 on one side of the mixing station 21 for limiting and fitting. However, considering the alternating loads experienced by the mixing blades 11 during actual operation, in this embodiment, it is preferable to install flange assemblies 12 on both sides of each mixing station 21. That is, as follows Figure 1 and Figure 2As shown, there are two flange assemblies 12 corresponding to the fastening components. The two flange assemblies 12 are respectively installed on both sides of the mixing station 21 along the axial direction of the drive shaft 2, and are respectively fixed and limited to the drive shaft 2. The bolt 13 can be inserted through the second connection hole 120 of one flange assembly 12, and after passing through the first connection hole 1120 of each mixing blade 11, it can be exited through the second connection hole 120 of the other flange assembly 12.
[0084] It should be understood that, since the flange assembly 12 needs to radially engage with the drive shaft 2 to achieve a relatively fixed limiting fit, if the flange assembly 12 adopts an integral structure, the installation of the integrated flange assembly 12 may interfere with the installation based on the sleeve installation of the stirring blade 11. Therefore, in this embodiment, the flange assembly 12 needs to be designed to be detachable, so that each individual flange assembly 12 can independently limit the fit with the drive shaft 2 radially. There are various specific ways for the flange assembly 12 and the drive shaft 2 to limit the fit. For ease of understanding, a specific example will be used to describe this in detail below.
[0085] Specifically, such as Figure 2 , Figures 11 to 15 As shown, the drive shaft 2 has multiple limiting grooves 23 evenly spaced along its circumference. The flange assembly 12 includes multiple flange blocks 121, each flange block 121 having a limiting block 122 on its radially inner side, and each flange block 121 having at least one second connecting hole 120 on its end face. When installing the flange assembly 12, the flange blocks 121 can be limited and engaged with the corresponding limiting grooves 23 along the radial direction of the drive shaft 2 by the limiting blocks 122, thus restricting the freedom of the flange blocks 121 in both the circumferential and axial directions of the drive shaft 2. All the flange blocks 121 are arranged at equal intervals along the circumferential direction of the drive shaft 2.
[0086] It is understandable that, to ensure smooth installation of the flange block 121, the extension directions of the limiting block 122 and the limiting groove 23 are both along the radial direction of the drive shaft 2. The specific number of flange blocks 121 included in the flange assembly 12 can be determined by those skilled in the art based on their actual needs. For example, if the number of second connecting holes 120 is set to eight, then... Figure 11 As shown, the flange assembly 12 can include two flange blocks 121, each flange block 121 having four corresponding second connection holes 120. A limiting block 122 is provided at the inner center of each flange block 121, extending radially along the drive shaft 2; it can also be as follows... Figure 15 As shown, the flange assembly 12 includes four flange blocks 121, each flange block 121 having two corresponding second connection holes 120, and a limiting block 122 being provided in the inner center of a single flange block 121.
[0087] It should be understood that the more flange blocks 121 there are, the less load a single flange block 121 needs to bear, thus allowing the structural dimensions of the limiting block 122 to be designed to be smaller; however, considering that the more flange blocks 121 there are, the more limiting blocks 122 need to be processed, and the more limiting grooves 23 are provided on the outside of the drive shaft 2, the more processing steps the drive shaft 2 needs to perform when processing the limiting grooves 23; this will ultimately lead to a reduction in the processing efficiency of the entire stirring assembly 1. Therefore, in this embodiment, the flange assembly 12 preferably adopts two symmetrical flange blocks 121.
[0088] It should be noted that the specific structural dimensions of the limiting block 122 and the limiting groove 23 can be designed according to the actual working conditions of the stirring blade 11. It is only necessary to ensure that the limiting fit of the limiting block 122 and the limiting groove 23 can meet the structural strength of the transmission shaft 2 and the load requirements of the stirring blade 11. The specific design process is a well-known technology to those skilled in the art, so it will not be described in detail here.
[0089] In this embodiment, according to the knowledge of mechanics of materials, if the limiting block 122 and the limiting groove 23 are used to limit the load on the stirring blade 11 in the axial and circumferential directions, the limiting block 122 and the limiting groove 23 need to have sufficient width in the circumferential direction and sufficient length in the radial direction. In order to ensure that the structural strength of the transmission shaft 2 meets the requirements, it may be necessary to appropriately increase the diameter of the transmission shaft 2, which will inevitably increase the cost and weight of the transmission shaft 2.
[0090] Therefore, in the technical solution of this application, such as Figure 15 As shown, the drive shaft 2 has an annular groove 22 on the side of the mixing station 21, and a limiting groove 23 is provided in a local area of the groove 22; the inner side of the flange block 121 is arc-shaped and corresponds to the groove 22. Therefore, during the installation of the flange assembly 12, the flange block 121 can be fitted with the groove 22 through its inner arc-shaped surface, and limited by the limiting block 122 and the limiting groove 23. At this time, the axial load of the mixing blade 11 can be resisted by the axial limitation of the flange block 121 and the groove 22, and the circumferential load of the mixing blade 11 can be resisted by the circumferential limitation of the limiting block 122 and the limiting groove 23. Therefore, in the structural design of the limiting block 122 and the limiting groove 23, the radial extension length of the limiting block 122 and the limiting groove 23 can be effectively shortened, as well as the circumferential extension length of the limiting block 122 and the limiting groove 23; this reduces the increase in the diameter of the drive shaft 2.
[0091] In layman's terms, the diameter of a traditional drive shaft 2 can be denoted as D. However, in the technical solution of this application, if the axial and circumferential loads on the stirring blade 11 are directly resisted through the limiting fit of the limiting block 122 and the limiting groove 23, then, based on the structural design of the limiting block 122 and the limiting groove 23, the diameter of the drive shaft 2 may need to be increased from D to 1.2D to meet its own structural requirements. When the axial load resistance of the stirring blade 11 is achieved by setting the axial limiting fit between the slot 22 and the flange block 121, based on the structural design of the limiting block 122 and the limiting groove 23, the diameter of the drive shaft 2 may need to be increased from D to 1.05D~1.1D to meet its own structural requirements. Compared to increasing by 1.2D, this can appropriately reduce the cost increase caused by the change in the structural dimensions of the drive shaft 2.
[0092] It should be understood that the outer contour shape of the flange assembly 12 can be rectangular or circular; in this embodiment, a circular outer contour is preferred. Therefore, in this embodiment, the flange assembly 12 preferably includes two flange blocks 121, both of which are semi-circular in structure; the end face of a single flange block 121 is provided with a plurality of second connecting holes 120, and a limiting block 122 is provided in the middle of the inner side of a single flange block 121.
[0093] It should be noted that, regarding the setting of the limiting grooves 23 on both sides of the single stirring station 21 on the drive shaft 2, in order to improve the structural strength of the drive shaft 2, the two limiting grooves 23 need to be staggered in the circumferential direction; for example... Figure 13 and Figure 14 As shown, since the flange assembly 12 includes two flange blocks 121, the limiting grooves 23 on both sides of the mixing station 21 need to be offset by 90° in the circumferential direction.
[0094] Meanwhile, the slot 22 on the side of the single mixing station 21 can be set as follows: Figure 14 As shown, slots 22 are provided on both sides of the mixing station 21, which provides stronger axial limiting capability for the mixing blade 11. However, due to the structure of the two slots 22, the axial distance between the two slots 22 is fixed. During the production of the mixing blade 11, the thickness accuracy of the connecting seat 112 is not very precise. This may result in a gap between the mixing blade 11 installed between the two slots 22. Consequently, when the mixing blade 11 is tightened using bolts 13 and flange assembly 12, the axial gap in the mixing blade 11 can easily cause it to wobble. Therefore, in this embodiment, as... Figure 13As shown, a slot 22 and a limiting groove 23 can be provided on one side of the mixing station 21 of the drive shaft 2, while only a limiting groove 23 is provided on the other side. The axial length of the limiting groove 23 needs to be greater than the axial height of the limiting block 122 provided on the flange block 121. Considering that the drive shaft 2 is generally installed vertically, it is preferable to provide the slot 22 and the limiting groove 23 on the upper side of the mixing station 21, and only the limiting groove 23 on the lower side of the mixing station 21. Based on the different structural configurations on both sides of the mixing station 21, the flange assemblies 12 installed on both sides are also different, such as... Figure 2 As shown, the flange assembly 12 on the upper side of the mixing station 21 can be defined as the upper flange assembly 12a, and the flange assembly 12 on the lower side of the mixing station 21 can be defined as the lower flange assembly 12b. The inner equivalent circle diameter of the flange block 121 corresponding to the upper flange assembly 12a is equal to or slightly larger than the diameter of the groove 22, and the inner equivalent circle diameter of the flange block 121 corresponding to the lower flange assembly 12b is equal to or slightly larger than the diameter of the drive shaft 2.
[0095] II. For the scenario where the mixing station 21 is located at the end of the drive shaft 2.
[0096] In this embodiment, as Figure 16 As shown, the connecting seat 112 is provided with a plurality of connecting holes arranged at equal intervals along the circumference, namely the first connecting hole 1120. The fastening assembly includes a plurality of bolts 13, which pass through the connecting holes on the connecting seat 112 and are threaded into the threaded holes corresponding to the end face of the drive shaft 2.
[0097] It should be noted that the method of directly connecting the drive shaft 2 to the connecting seat 112 by creating threaded holes on its end face is generally only suitable for drive shafts 2 with larger diameters. If the diameter of the drive shaft 2 is small, the threaded holes will be more concentrated, which may lead to insufficient structural strength. Therefore, in this embodiment, for drive shafts 2 with smaller diameters, such as... Figure 17 As shown, a flange seat 14 can be installed on the end face of the drive shaft 2. Multiple third connecting holes 140 are provided circumferentially on the outer side of the flange seat 14, and these third connecting holes 140 can be aligned with the first connecting holes 1120 provided on the connecting seat 112. Simultaneously, a relatively small number of fixing holes 141 are provided at the center of the flange seat 14. That is, the fastening assembly includes the flange seat 14, multiple first bolts 131, and multiple second bolts 132. When installing the stirring blade 11, the stirring blade 11 can first be fitted onto the end wall of the drive shaft 2 through the through hole 1121 in the center of the connecting seat 112. Then, the flange seat 14 is screwed and tightened through the second bolts 132 through the fixing holes 141 and the threaded holes provided on the end face of the drive shaft 2. Finally, the first bolts 131 are passed through the first connecting holes 1120 on the connecting seat 112 and the third connecting holes 140 on the flange seat 14, and then tightened with nuts.
[0098] Another aspect of this application provides a stirrer, such as Figure 1 and Figure 2 As shown, one preferred embodiment includes a drive shaft 2 and the aforementioned stirring assembly 1. The drive shaft 2 is provided with a stirring station 21, and the stirring assembly 1 is installed at the stirring station 21.
[0099] It is understood that the drive shaft 2 can be provided with multiple mixing stations 21 along the axial direction, and each mixing station 21 is equipped with a mixing component 1; the number of blades 111 corresponding to the mixing component 1 installed in each mixing station 21 can be the same, or completely different, or some mixing stations 21 can have the same number of blades 111, while the remaining mixing stations 21 have different numbers of blades 111. Those skilled in the art can select the specific number of blades 111 required for each mixing station 21 according to the specific application scenario.
[0100] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.
Claims
1. A stirring assembly, disposed at a stirring station on a drive shaft; characterized in that, include: At least one stirring blade; the stirring blade includes an integrally formed connecting seat and at least one blade, and multiple stirring blades are stacked and aligned axially through the connecting seat; The stirring blade is suitable for being obtained by pressing the blade after cutting it from a plate of equal thickness; The lifting heights of the blades corresponding to the multiple stirring blades located at a single stirring station are different, so that when the multiple stirring blades are installed, the heights of the blades corresponding to each blade are consistent. as well as Fastening components; The fastening assembly is adapted to detachably and securely connect the connecting seat of the stirring blade to the drive shaft. Each mixing station requires at least two blades, and multiple blades are arranged at equal intervals along the circumferential direction of the drive shaft.
2. The stirring assembly as described in claim 1, characterized in that, The number of blades integrally formed by a single stirring blade is less than or equal to four, and the interval angle between adjacent blades along the circumferential direction of the connecting seat is greater than or equal to 90°.
3. The stirring assembly as described in claim 2, characterized in that, The mixing station is equipped with multiple mixing blades, and each mixing blade is integrally formed with one blade.
4. The stirring assembly as described in claim 2, characterized in that, When the number of blades required for the mixing station is less than or equal to four, the mixing station is equipped with one mixing blade, and the mixing blade is integrally formed with all the blades required for the mixing station.
5. The stirring assembly as described in claim 2, characterized in that, When the number of blades required for the stirring station is odd and greater than four, the stirring station is equipped with multiple stirring blades, and the number of blades integrally formed for each stirring blade is not exactly the same.
6. The stirring assembly as described in claim 2, characterized in that, When the required number of blades for the mixing station is even, the number of the mixing blades installed is at least one, and the number of blades integrally formed by the mixing blades is even.
7. The stirring assembly as described in claim 6, characterized in that, When the number of blades required for the stirring station is even, the number of integrally formed stirring blades used is two, and the two blades are arranged at 180° intervals around the connecting seat.
8. The stirring assembly according to any one of claims 1-7, characterized in that, The stirring station is located at the end of the drive shaft, and the connecting seat is provided with a plurality of connecting holes arranged at equal intervals along the circumferential direction. The fastening assembly includes a plurality of bolts, which pass through the connecting holes on the connecting seat and are threaded into threaded holes corresponding to the end face of the drive shaft.
9. The stirring assembly according to any one of claims 1-7, characterized in that, The stirring station is located at the end of the drive shaft. A through hole is provided at the center of the connecting seat, and the connecting seat is sleeved onto the drive shaft through the through hole. The side of the connecting seat has a plurality of first connecting holes arranged at equal intervals along the circumference. The fastening assembly includes: A flange seat; the flange seat has a plurality of fixing holes at its center, and a plurality of third connecting holes aligned with the first connecting holes are provided at equal intervals along the circumferential direction on the outer side of the flange seat; wherein the number of fixing holes is less than the number of third connecting holes; Multiple second bolts; the flange seat is threadedly engaged with the threaded holes corresponding to the end face of the drive shaft by the second bolts passing through the fixing holes; and Multiple first bolts; the first bolts pass through the corresponding first connecting hole and the third connecting hole and are fastened together.
10. The stirring assembly according to any one of claims 1-7, characterized in that, The stirring station is located on the shaft section of the drive shaft. The center of the connecting seat is provided with a through hole, and the connecting seat is sleeved and installed on the drive shaft through the through hole. The side of the connecting seat is provided with a plurality of first connecting holes arranged at equal intervals along the circumferential direction. The fastening assembly includes: A detachable flange assembly; the flange assembly is mounted axially along the drive shaft to the side of the mixing station, and the flange assembly and the drive shaft are in a relatively fixed limiting fit; the side of the flange assembly is provided with a second connecting hole aligned with the first connecting hole; and Multiple bolts; the bolts are adapted to pass through the corresponding first connecting hole and second connecting hole and to fasten the connection.
11. The stirring assembly as described in claim 10, characterized in that, Two flange assemblies are provided, and the two flange assemblies are respectively installed on both sides of the mixing station along the axial direction of the drive shaft, and each flange assembly is relatively fixed and limited to the drive shaft.
12. The stirring assembly as described in claim 10, characterized in that, The drive shaft is provided with multiple limiting grooves at equal intervals in the circumferential direction; The flange assembly includes a plurality of flange blocks, each flange block having a limit block disposed on its radially inner side, and each flange block having at least one second connection hole disposed on its end face. The flange blocks are engaged circumferentially and axially with the corresponding limiting grooves via the limiting blocks, and all the flange blocks are arranged at equal intervals along the circumferential direction of the drive shaft.
13. The stirring assembly as described in claim 12, characterized in that, The drive shaft is provided with an annular groove on the side of the mixing station; the inner side of the flange block is arc-shaped to correspond to the groove, so that the flange block and the groove are axially limited and engaged.
14. The stirring assembly as described in claim 13, characterized in that, The flange blocks are in the form of two, and both flange blocks are semi-circular in structure; each flange block has multiple second connecting holes on its end face, and a limiting block is provided in the middle of the inner side of each flange block.
15. A stirrer, characterized in that, It includes a drive shaft and a stirring assembly as described in any one of claims 1-14, wherein a stirring station is provided on the drive shaft, and the stirring assembly is installed at the stirring station.
16. The stirrer as claimed in claim 15, characterized in that, The drive shaft is provided with a plurality of stirring stations along the axial direction, and each stirring station is equipped with the stirring assembly. The number of blades corresponding to the stirring components installed at each of the stirring stations may be the same or not exactly the same.