A forward and reverse rotation mechanism

Abstract

The utility model discloses a kind of forward and reverse mechanism, comprising: driving motor, as power source;Driving bevel gear, with the output shaft of driving motor is connected, is rotated by driving motor;Reverse bevel gear, with driving bevel gear engages;Forward bevel gear, with driving bevel gear engages;Reverse shaft, with reverse bevel gear is connected, is rotated by reverse bevel gear;Forward shaft, with forward bevel gear is connected, is rotated by forward bevel gear, and forward shaft rotation is placed outside reverse shaft. With superior stirring effect, space utilization is reasonable, stable and reliable and the benefit of wide application range of operation.

Description

Technical Field

[0001] The utility model relates to the field of mixing equipment technology, and in particular to a forward and reverse rotation mechanism. Background Technology

[0002] In numerous industrial production fields such as chemical reactions, pharmaceuticals, and food processing, reaction vessels are common equipment. The thorough mixing of materials inside is crucial for the progress of the reaction and the assurance of product quality. Traditional reaction vessel stirring devices typically employ a unidirectional stirring method. This method often suffers from insufficient mixing and low stirring efficiency, making it difficult to meet the requirements of some complex chemical reactions regarding the degree of material mixing and flow field characteristics. Therefore, developing a mechanism capable of both forward and reverse stirring is of significant practical importance for improving the stirring effect within reaction vessels. Utility Model Content

[0003] To address the shortcomings of the aforementioned technologies, this utility model provides a forward and reverse rotation mechanism.

[0004] To solve the above technical problems, the technical solution adopted by this utility model is: a forward and reverse rotation mechanism, comprising:

[0005] The drive motor serves as the power source.

[0006] The drive bevel gear is connected to the output shaft of the drive motor and is driven to rotate by the drive motor.

[0007] The reverse bevel gear meshes with the drive bevel gear;

[0008] The forward-rotating bevel gear meshes with the driving bevel gear.

[0009] The reverse shaft is connected to the reverse bevel gear and is driven to rotate by the reverse bevel gear.

[0010] The forward rotating shaft is connected to the forward rotating bevel gear and is driven to rotate by the forward rotating bevel gear. The rotation of the forward rotating shaft is sleeved outside the reverse rotating shaft.

[0011] Furthermore, the forward shaft has a forward propeller, and the reverse shaft has a reverse propeller A and a reverse propeller B.

[0012] Furthermore, the forward rotating shaft has a through hole in its own axial direction, one end of the reverse rotating shaft is connected to the reverse bevel gear, and the other end passes through the through hole on the forward rotating shaft and extends to the outside of the forward rotating shaft. The two rotate independently of each other in the radial direction around their own axes.

[0013] Furthermore, the forward and reverse shafts are rotatably connected by bearings. Specifically, at least two bearing mounting positions are provided on the inner wall of the through hole of the forward shaft, and the inner ring of the bearing is interference-fitted with the outer wall of the reverse shaft to achieve relative rotation between the forward and reverse shafts.

[0014] Furthermore, the forward-rotating propeller is installed at the lower end of the forward-rotating shaft, and the reverse-rotating propellers A and B are symmetrically installed at the lower end of the reverse-rotating shaft, with the forward-rotating propeller surrounding the reverse-rotating propellers A and B.

[0015] This utility model provides a forward and reverse rotation mechanism, which has many significant advantages. Overall, it offers superior stirring effect, rational space utilization, stable and reliable operation, and wide applicability. Specifically:

[0016] Multi-directional stirring: By simultaneously operating forward and reverse-rotating impellers, stirring is achieved in both directions, creating a complex and interwoven stirring flow field within the reactor. This multi-directional stirring breaks up the static, layered distribution of materials, causing strong macroscopic convection and microscopic diffusion in different directions. This significantly improves the uniformity of mixing, preventing localized material agglomeration or incomplete mixing. It plays a crucial role in promoting efficient chemical reactions and ensuring the stability of product quality.

[0017] Enhanced mass and heat transfer: Thorough stirring helps increase the contact area between reactants, accelerates the collision frequency between molecules, thereby strengthening the mass transfer process and increasing the reaction rate. At the same time, good mixing also makes the heat distribution in the reactor more uniform, avoiding local overheating or overcooling, which is conducive to maintaining the stability of the reaction, especially suitable for some temperature-sensitive or heat transfer-critical chemical reactions.

[0018] The compact shaft system layout, with the forward rotating shaft sleeved outside the reverse rotating shaft, enables independent rotation and transmission of the two shafts within a limited space. This effectively improves space utilization and avoids increasing the size or floor space of the equipment. As a result, the mechanism can be better adapted to the internal structure of various reactors, demonstrating good applicability whether it is for the installation of new reactors or for the renovation and upgrading of existing reactors.

[0019] The blade arrangement is optimized; the forward-rotating blade is located between the reverse-rotating blades A and B. This arrangement allows each blade to form a highly efficient and coordinated stirring mode in the reactor, fully covering the material area in the reactor and achieving an all-round stirring effect, further improving the stirring efficiency. There is no need to add other auxiliary stirring devices, reducing the complexity and cost of the equipment.

[0020] Stable support structure; In Embodiment 1, both the reverse and forward shafts are supported by the reactor, which provides stable support for the shaft system, ensuring the stability of the entire mechanism during operation. In Embodiment 2, the forward shaft is supported by the reactor, while the reverse shaft is supported by bearings inside the forward shaft. This design cleverly utilizes the internal space of the forward shaft and the low friction characteristics of the bearings, enabling the reverse shaft to rotate smoothly and steadily, reducing frictional loss and vibration between moving parts, effectively reducing the equipment failure rate and extending its service life.

[0021] Precise power transmission; relying on the precise meshing between bevel gears, accurate power transmission and steering conversion are achieved. Bevel gear transmission has the advantages of high transmission efficiency, accurate transmission ratio, and strong load-bearing capacity. It can ensure that the forward and reverse shafts operate stably according to the set speed and direction. Even under long-term, high-intensity stirring conditions, it can maintain good transmission performance, providing a strong guarantee for the continuous and stable production of the reactor.

[0022] Applications in multiple fields: This forward and reverse rotation mechanism can be widely used in many industrial fields involving reaction vessel stirring processes, such as chemical, pharmaceutical, food, printing and dyeing, and papermaking. It provides efficient and reliable stirring solutions for various chemical reactions and material mixing processes, which helps to improve production efficiency, product quality, and reduce production costs. It is of positive significance for promoting technological progress and industrial upgrading in related industries.

[0023] It is adaptable to a variety of materials; whether the materials are low or high viscosity, or have different rheological properties, by reasonably adjusting the structural parameters of the stirring paddle, the speed of the drive motor, and the ratio of forward and reverse stirring time, this mechanism can adapt well and achieve effective stirring and mixing, demonstrating wide material adaptability and good versatility. Attached Figure Description

[0024] Figure 1 A structural disassembly diagram for implementation one.

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure for implementation two.

[0026] In the diagram: 1. Drive bevel gear; 2. Reverse bevel gear; 3. Forward bevel gear; 4. Reverse shaft; 5. Forward shaft; 6. Forward propeller; 7. Reverse propeller A; 8. Reverse propeller B; 9. Drive motor; 10. Bearing. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] Example 1

[0029] like Figure 1 As shown, on the reactor, both the reverse rotation shaft 4 and the forward rotation shaft 5 are rotated and supported by the reactor's own support structure. This installation method makes full use of the reactor's existing support system, eliminating the need for additional complex support components, and is characterized by its simple structure and ease of implementation.

[0030] The forward and reverse mechanisms include:

[0031] The drive motor 9, as the power source for the entire forward and reverse rotation mechanism, is installed outside the reactor. Its output shaft is connected to the drive bevel gear 1 to provide power for the operation of the mechanism.

[0032] The active bevel gear 1 is firmly connected to the output shaft of the drive motor 9. When the drive motor 9 starts, the active bevel gear 1 rotates accordingly, and it is a key starting component for power transmission.

[0033] The reverse bevel gear 2 meshes with the drive bevel gear 1; after receiving power from the drive bevel gear 1, the reverse bevel gear 2 drives the reverse shaft 4 to rotate; the forward bevel gear 3 meshes with the drive bevel gear 1; the forward bevel gear 3, driven by the drive bevel gear 1, drives the forward shaft 5 to rotate. The forward shaft 5 is rotatably sleeved outside the reverse shaft 4, and the forward shaft 5 has a through hole in its own axial direction. One end of the reverse shaft 4 is connected to the reverse bevel gear 2, and the other end passes through the through hole on the forward shaft 5 and extends to the outside of the forward shaft 5. Both rotate independently in the radial direction around their own axes. This layout is compact and reasonable, effectively utilizing space.

[0034] The forward rotating shaft 5 is connected to the forward rotating bevel gear 3 and is driven to rotate by the forward rotating bevel gear 3. The forward rotating shaft 5 has a forward rotating propeller 6, which is installed at the lower end of the forward rotating shaft 5. The reverse rotating shaft 4 is connected to the reverse rotating bevel gear 2 and is driven to rotate by the reverse rotating bevel gear 2. The reverse rotating shaft 4 is equipped with a reverse rotating propeller A7 and a reverse rotating propeller B8, which are symmetrically installed at the lower end of the reverse rotating shaft 4. The forward rotating propeller 6 surrounds the reverse rotating propeller A7 and the reverse rotating propeller B8.

[0035] When the drive motor 9 starts, its output shaft drives the drive bevel gear 1 to rotate. Since the drive bevel gear 1 meshes with both the reverse bevel gear 2 and the forward bevel gear 3, the power is transmitted in two separate paths. The drive bevel gear 1 drives the reverse bevel gear 2 to rotate; due to the meshing characteristics of bevel gears, the reverse bevel gear 2 rotates in the opposite direction to the drive bevel gear 1. The rotation of the reverse bevel gear 2 drives the reverse shaft 4 to rotate, which in turn causes the reverse propellers A7 and B8, mounted at the lower end of the reverse shaft 4, to rotate, thus reversing the direction of stirring the material in the reactor. Because the reverse propellers A7 and B8 are symmetrically distributed, they generate a balanced stirring force, causing the material to flow in an orderly reverse direction within the reactor.

[0036] Simultaneously, the active bevel gear 1 drives the forward-rotating bevel gear 3 to rotate, with the rotation direction of the forward-rotating bevel gear 3 opposite to that of the reverse-rotating bevel gear 2. The rotation of the forward-rotating bevel gear 3 drives the forward-rotating shaft 5 to rotate, and the forward-rotating paddle 6 rotates accordingly, stirring the material in the forward direction. The forward-rotating paddle 6 surrounds the reverse-rotating paddles A7 and B8, and its forward stirring action cooperates with the reverse stirring action of the reverse paddles to form a stirring flow field in different directions, breaking the laminar flow state of the material, promoting full mixing and diffusion of the material, and improving reaction efficiency and quality.

[0037] Throughout the stirring process, both the reverse-rotating shaft 4 and the forward-rotating shaft 5 rotate stably thanks to the support structure of the reactor, ensuring smooth stirring. By controlling the speed, start / stop parameters of the drive motor 9, the speeds of the forward-rotating propeller 6 and the reverse-rotating propellers A7 and B8 can be flexibly adjusted to meet the stirring requirements of different reaction stages of the materials.

[0038] It should be noted that in the reactor, the method of achieving rotational support for the reverse and forward axes mainly relies on the reactor's own support structure.

[0039] Regarding the support method for the reverse shaft: A rotating support base is installed at the top of the reactor. The upper end of the reverse shaft connects to the reverse bevel gear, and the lower end passes through the bearing hole on the top support base and extends into the reactor. The reverse shaft mates with the inner ring of the bearing, while the outer ring of the bearing is fixed inside the support base, ensuring stability and reducing friction during rotation. Another support base is installed at the bottom of the reactor. The lower end of the reverse shaft passes through the reactor and mates with the bearing on the bottom support base, with the bearing arrangement similar to that of the top support.

[0040] Regarding the support method of the forward rotation shaft: After the upper end of the forward rotation shaft is connected to the forward bevel gear, it passes through the independent support base at the top of the reactor. The shaft mates with the inner ring of the bearing, and the outer ring of the bearing is fixed on the support base. The lower end of the forward rotation shaft also passes through the inside of the reactor and mates with the bearing on the bottom support base, forming a stable support system together with the bottom support of the reverse rotation shaft.

[0041] In some reactor designs, the support structures for the reverse and forward rotation shafts can be combined, with top and bottom supports working together. The arrangement of the support bases and bearings must ensure the concentricity of the shaft system with the reactor body to avoid vibration and wear caused by eccentricity. Through these support methods, the reactor can provide stable rotational support for the reverse and forward rotation shafts, ensuring the smoothness and reliability of the shaft system during operation, thereby guaranteeing the normal operation of the forward and reverse rotation mechanism. However, this is not limited to the above methods; theoretically, ensuring the stability and concentricity of the shaft system in the vertical direction is acceptable.

[0042] Example 2

[0043] like Figure 2As shown, another installation method on the reactor involves the forward rotating shaft 5 being supported by the reactor's support structure, while the reverse rotating shaft 4 is supported and rotated by the bearing 10 inside the forward rotating shaft 5. This installation method cleverly utilizes the internal space of the forward rotating shaft 5, improving the overall compactness of the mechanism while ensuring the stability of the reverse rotating shaft 4's rotation.

[0044] In the forward and reverse rotation mechanism, the connection relationship of the drive motor 9, the active bevel gear 1, the reverse bevel gear 2, and the forward bevel gear 3 is the same as in Embodiment 1. The drive motor 9 drives the active bevel gear 1 to rotate, and the active bevel gear 1 drives the reverse bevel gear 2 and the forward bevel gear 3 to rotate, thereby realizing the branching transmission of power.

[0045] The forward rotating shaft 5 is stably installed via the support structure of the reactor, and a through hole is formed inside it along the axial direction. One end of the reverse rotating shaft 4 is connected to the reverse bevel gear 2, and the other end passes through the through hole of the forward rotating shaft 5 and extends to the outside of the forward rotating shaft 5. The forward rotating shaft 5 and the reverse rotating shaft 4 are rotatably connected by at least two bearings. Specifically, bearing mounting positions are provided on the inner wall of the through hole of the forward rotating shaft 5, and the inner ring of the bearing is interference-fitted with the outer wall of the reverse rotating shaft 4, thereby realizing the relative rotation between the forward rotating shaft 5 and the reverse rotating shaft 4. This bearing connection method not only ensures the stable rotation of the reverse rotating shaft 4 inside the forward rotating shaft 5, but also effectively reduces frictional loss between the two, extending the service life of the mechanism.

[0046] Similar to the installation position in Embodiment 1, the forward propeller 6 is installed at the lower end of the forward shaft 5, and the reverse propellers A7 and B8 are symmetrically installed at the lower end of the reverse shaft 4, with the forward propeller 6 located outside the reverse propellers A7 and B8.

[0047] In this embodiment, the forward rotating shaft 5 is supported by the reactor, providing a stable foundation for the entire mechanism; the reverse rotating shaft 4 is supported by bearings within the forward rotating shaft 5, making its rotation smoother and more stable. By rationally controlling the operating parameters of the drive motor 9, the rotation speeds of the forward rotating propeller 6 and the reverse rotating propellers A7 and B8 can be flexibly adjusted to meet the requirements of different chemical reactions on stirring intensity and flow field characteristics, thereby achieving efficient material mixing and reaction process control.

[0048] The two embodiments above illustrate the forward and reverse rotation mechanism from different installation and support methods. Whether both the reverse and forward rotation shafts rely on the reactor for support and rotation, or the forward rotation shaft relies on the reactor for support and the reverse rotation shaft relies on the bearing inside the forward rotation shaft for support and rotation, the forward and reverse rotation mechanism can operate well and meet the stirring requirements of the materials in the reactor. Moreover, the components cooperate closely with each other, which fully demonstrates the practicality and reliability of the forward and reverse rotation mechanism of this utility model, and can provide strong support for reactor stirring operations under different working conditions.

[0049] The above embodiments are not intended to limit the present invention. Unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The present invention is not limited to the examples above. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the technical solution of the present invention are also within the protection scope of the present invention. Furthermore, the technical features involved in the different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

Claims

1. A forward and reverse rotation mechanism, characterized in that, include: Drive motor (9) serves as the power source; The active bevel gear (1) is connected to the output shaft of the drive motor (9) and is driven to rotate by the drive motor (9); The reverse bevel gear (2) meshes with the drive bevel gear (1); The forward bevel gear (3) meshes with the drive bevel gear (1); The reverse shaft (4) is connected to the reverse bevel gear (2) and is driven to rotate by the reverse bevel gear (2); the forward shaft (5) is connected to the forward bevel gear (3) and is driven to rotate by the forward bevel gear (3), and the forward shaft (5) is rotated outside the reverse shaft (4).

2. The forward and reverse rotation mechanism according to claim 1, characterized in that: The forward shaft (5) has a forward propeller (6), and the reverse shaft (4) is equipped with a reverse propeller A (7) and a reverse propeller B (8).

3. The forward and reverse rotation mechanism according to claim 2, characterized in that: The forward rotating shaft (5) has a through hole in its own axial direction. One end of the reverse rotating shaft (4) is connected to the reverse bevel gear (2), and the other end passes through the through hole on the forward rotating shaft (5) and extends to the outside of the forward rotating shaft (5). The two rotate independently of each other in the radial direction with their own axes as the center.

4. The forward and reverse rotation mechanism according to claim 2, characterized in that: The forward rotating shaft (5) and the reverse rotating shaft (4) are rotatably connected by a bearing (10). Specifically, at least two bearing mounting positions are provided on the inner wall of the through hole of the forward rotating shaft (5). The inner ring of the bearing is interference-fitted with the outer wall of the reverse rotating shaft (4) to achieve relative rotation between the forward rotating shaft (5) and the reverse rotating shaft (4).

5. The forward and reverse rotation mechanism according to claim 3 or 4, characterized in that: The forward-rotating propeller (6) is installed at the lower end of the forward-rotating shaft (5), and the reverse-rotating propellers A (7) and B (8) are symmetrically installed at the lower end of the reverse-rotating shaft (4). The forward-rotating propeller (6) surrounds the reverse-rotating propellers A (7) and B (8).

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