Stirring shaft fixing mechanism and stirrer

Abstract

This invention relates to chemical machinery and process technology, and discloses a stirring shaft fixing mechanism, including a bushing and a connecting shaft connected to the stirring shaft. The bushing has a downward-facing receiving groove. One end of the connecting shaft is installed in the receiving groove, and the other end is connected to a base inside the stirrer body. The outer circumferential surface of the connecting shaft fits against the inner wall of the receiving groove. The stirring shaft and the connecting shaft are connected by the bushing, and the bushing opening faces downward to prevent impurities from entering, thus extending the service life of the stirring device. Additionally, this invention also provides a stirrer, including a stirrer body, a stirring shaft, and the stirring shaft fixing mechanism of this invention.

Description

Technical Field

[0001] This invention relates to chemical machinery and process technology, specifically to a stirring shaft fixing mechanism. It also relates to a stirrer. Background Technology

[0002] With increasingly stringent environmental protection requirements, more environmentally friendly white mud is being gradually adopted as a desulfurizing agent in industrial production processes. This measure not only helps reduce sulfur dioxide emissions but also enhances the environmental image and social responsibility of enterprises.

[0003] However, in actual operation, white mud inevitably contains a certain proportion of fine impurities, which have a certain impact on existing production equipment. For example, during the process of white mud desulfurization entering the limestone slurry tank, because the white mud contains a large number of fine particles (approximately 2-5 mm in diameter), these impurities are difficult to completely remove during filtration. As a result, they easily deposit in the gap between the connecting shaft and the agitator shaft after entering the limestone slurry tank. Over time, this deposit will accelerate the wear at the connection between the connecting shaft and the agitator shaft, shorten its service life, and may lead to the failure of the agitator. Frequent tank backup, slurry discharge, and maintenance not only increase maintenance costs but also affect the normal operation of the production line. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a stirring shaft fixing mechanism to prevent impurities from entering and to extend the service life of the stirring device.

[0005] The technical problem to be solved by the present invention also provides a stirrer that prevents impurities from entering and helps to extend the service life of the stirrer.

[0006] To achieve the above objectives, the present invention provides a stirring shaft fixing mechanism for connecting a stirring shaft and a stirrer body, including a bushing and a connecting shaft connected to the stirring shaft. The bushing has a downward-facing receiving groove. One end of the connecting shaft is installed in the receiving groove, and the other end is connected to a base inside the stirrer body. The outer peripheral surface of the connecting shaft is in contact with the inner wall of the receiving groove.

[0007] Preferably, the stirring shaft fixing mechanism further includes a liquid inlet unit for injecting lubricating medium into the accommodating tank.

[0008] Preferably, the liquid inlet unit includes a liquid inlet located on the side wall of the accommodating tank, a flow channel connected to the liquid inlet, and a lubricating medium supply device connected to the end of the flow channel away from the liquid inlet, wherein the flow channel is located inside the stirring shaft.

[0009] Preferably, a bearing is installed in the receiving groove, and the bearing is located between the receiving groove and the outer wall of the connecting shaft.

[0010] Preferably, the bushing is provided with an overflow protrusion, the overflow protrusion is arranged continuously in a ring along the inner wall of the receiving groove, the overflow protrusion is located on the outside of the bearing, and an overflow groove is formed on the outer wall of the connecting shaft to cooperate with the overflow protrusion.

[0011] Preferably, the overflow protrusion includes a first protrusion and a second protrusion, the first protrusion being located near the bearing, the second protrusion being located outside the first protrusion, and both the first protrusion and the second protrusion abutting against the overflow groove.

[0012] Preferably, the cross-sectional area of ​​the first protrusion is larger than that of the second protrusion, and the overflow groove is structured to be in contact with the entire end face of the first protrusion and the second protrusion.

[0013] Preferably, the connecting shaft includes a first shaft portion and a second shaft portion connected to the first shaft portion. The first shaft portion is installed in the receiving groove, and the second shaft portion is connected to the base. The cross-sectional area of ​​the first shaft portion is smaller than the cross-sectional area of ​​the second shaft portion.

[0014] A second aspect of the present invention provides a stirrer, comprising a stirrer body, a stirring shaft installed within the stirrer body, and a stirring shaft fixing mechanism of the present invention.

[0015] Preferably, at least two stirring discs are mounted on the stirring shaft, and the stirring discs are arranged at intervals along the length of the stirring shaft. A drive shaft is provided at the end of the stirring shaft away from the bushing, and the drive shaft is connected to a drive component to drive the stirring shaft to rotate.

[0016] Through the above technical solution, the stirring shaft fixing mechanism provided by the present invention connects the stirring shaft and the stirring body through a downward-facing accommodating groove on the bushing and a connecting shaft. This effectively prevents particulate impurities from entering the gap between the accommodating groove and the connecting shaft, reduces wear, and helps extend the service life of the stirring device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the stirring shaft fixing mechanism of the present invention;

[0018] Figure 2 This is a schematic diagram of the bushing structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the bushing and the connecting shaft of the present invention;

[0020] Figure 4This is a schematic diagram of the overflow protrusion of the present invention.

[0021] Explanation of reference numerals in the attached figures

[0022] 1. Drive shaft; 2. Stirring shaft; 3. Shaft sleeve; 3-1. Receptacle; 3-2. Liquid inlet; 4. Connecting shaft; 4-1. First shaft part; 4-2. Second shaft part; 5. Stirring disc; 6. Flow channel; 7. Bearing; 8. Overflow protrusion; 8-1. First protrusion; 8-2. Second protrusion; 9. Base. Detailed Implementation

[0023] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of the present invention by way of example, but should not be used to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0024] These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0025] It should be noted that, in the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "inner," "outer," etc., indicating orientation or positional relationship are only for the convenience of describing this invention 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 therefore should not be construed as a limitation of this invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] Furthermore, the terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible range of error. "Parallel" is not strictly parallel, but within the permissible range of error. Terms such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after the word, and do not exclude the possibility of encompassing other elements as well.

[0027] It should also be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0028] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0030] See Figure 1 This invention discloses a stirring shaft fixing mechanism for connecting a stirring shaft 2 and a stirrer body. It includes a bushing 3 and a connecting shaft 4 connected to the stirring shaft 2. The bushing 3 has a downward-facing receiving groove 3-1. One end of the connecting shaft 4 is installed in the receiving groove 3-1, and the other end is connected to a base 9 inside the stirrer body. The outer circumferential surface of the connecting shaft 4 is in contact with the inner wall of the receiving groove 3-1. It should be noted that the downward-facing opening is towards the direction of gravity. By connecting the stirring shaft 2 and the connecting shaft 4 through the bushing 3, and with the bushing 3's opening facing downwards, impurities at the connection point are more likely to slide down under gravity. When the stirring shaft 2 rotates, impurities are less likely to enter the bushing 3. Preventing impurities from entering extends the service life of the bushing 3 and the connecting shaft 4, reduces the frequency of slurry discharge and maintenance of the device, and thus extends the service life of the stirring device.

[0031] In some embodiments, the stirring shaft fixing mechanism further includes a liquid inlet unit for injecting lubricating medium into the receiving tank 3-1. The lubricating medium can reduce friction between the connecting shaft 4 and the bushing 3, reduce wear, and also remove the heat generated by friction. At the same time, it cools the connecting shaft 4 and the bushing 3 to keep them at a suitable working temperature and prevents overheating from causing deformation of the connecting shaft 4 or the bushing 3. In addition, the medium fills between the connecting shaft 4 and the bushing 3, and a liquid barrier is formed by continuously supplying the lubricating medium to prevent impurities from entering the connection part. The lubricating medium can be continuously supplied to the receiving tank 3-1. The lubricating medium is, for example, mineral oil, lithium grease, silicone oil, etc.

[0032] In some embodiments, the liquid inlet unit includes a liquid inlet 3-2 located on the side wall of the receiving tank 3-1, a flow channel 6 connected to the liquid inlet 3-2, and a lubricating medium supply device connected to the end of the flow channel 6 away from the liquid inlet 3-2. The flow channel 6 is located inside the stirring shaft 2 and is disposed on the stirring shaft 2. The flow channel 6 flows from the end of the stirring shaft 2 away from the bushing 3 to the liquid inlet 3-2, which can save external space, making the whole device more compact, while reducing the loss of lubricating medium during the transmission process, ensuring that the lubricating medium can accurately reach the predetermined position, and improving lubrication efficiency.

[0033] In some embodiments, a bearing 7 is installed in the receiving groove 3-1. The bearing 7 is located between the receiving groove 3-1 and the outer wall of the connecting shaft 4. The bearing 7 can prevent direct contact between the connecting shaft 4 and the bushing 3, thereby avoiding friction and wear. As a friction-reducing element, the bearing 7 effectively reduces the friction and wear between the connecting shaft 4 and the bushing 3 during operation, which is beneficial to extending the service life of the equipment. At the same time, the bearing 7 can make the stirring shaft 2 rotate more smoothly, reduce energy loss, and improve rotation efficiency.

[0034] In some embodiments, the bushing 3 is provided with an overflow protrusion 8, which is arranged continuously in a ring along the inner wall of the receiving groove 3-1. The overflow protrusion 8 is located on the outside of the bearing 7, with the outside being the side closest to the opening of the bushing 3. An overflow groove is formed on the outer wall of the connecting shaft 4 to cooperate with the overflow protrusion 8. The overflow protrusion 8, located on the outside of the bearing 7, can limit the bearing 7, prevent the bearing 7 from moving outward, ensure that the bearing 7 is always in the correct position, and avoid excessive wear or other mechanical failures caused by the bearing 7 shifting. The cooperation between the overflow protrusion 8 and the overflow groove makes the connection between the connecting shaft 4 and the stirring shaft 2 tighter, which can reduce vibration and noise caused by loosening and improve the stability of the entire mechanism. In addition, the overflow protrusion 8 can optimize the flow path of the lubricating medium, which helps to avoid leakage of the lubricating medium. After the lubricating medium enters the receiving groove 3-1, it is evenly distributed along the outer surface of the connecting shaft 4. The overflow protrusion 8 can slow down the flow of the lubricating medium out of the bushing 3, ensuring that the bearing 7 is adequately lubricated.

[0035] In some embodiments, the overflow protrusion 8 includes a first protrusion 8-1 and a second protrusion 8-2. The first protrusion 8-1 is located near the bearing 7, and the second protrusion 8-2 is located outside the first protrusion 8-1. Both the first protrusion 8-1 and the second protrusion 8-2 abut against the overflow groove. The first protrusion 8-1, located near the bearing 7, can effectively limit the bearing axially and prevent the bearing from moving axially downward. The cooperation between the first protrusion 8-1 and the second protrusion 8-2 and the overflow groove forms a multi-seal structure, which effectively prevents impurities from entering the bearing and helps to avoid leakage of lubricating medium.

[0036] In some embodiments, the cross-sectional area of ​​the first protrusion 8-1 is larger than that of the second protrusion 8-2. The overflow groove is structured to be suitable for contacting the entire end face of the first protrusion 8-1 and the second protrusion 8-2. Regarding the cross-sectional area of ​​the protrusions, it should be noted that the first protrusion 8-1 and the second protrusion 8-2 are arranged along the circumferential direction of the bushing 3. When a cross-section perpendicular to the radial direction of the bushing 3 is taken, the cross-sectional shape of each protrusion can be seen, and the area of ​​this cross-section is the cross-sectional area.

[0037] In some embodiments, the connecting shaft 4 includes a first shaft portion 4-1 and a second shaft portion 4-2 connected to the first shaft portion 4-1. The first shaft portion 4-1 is installed in the receiving groove 3-1, and the second shaft portion 4-2 is connected to the base 9. The cross-sectional area of ​​the first shaft portion 4-1 is smaller than that of the second shaft portion 4-2. The first shaft portion 4-1 cooperates with the bearing 7 in the receiving groove 3-1, which can reduce the contact area between the first shaft portion 4-1 and the bushing 3, thereby reducing the friction between the first shaft portion 4-1 and the bushing 3, reducing the resistance of the stirring shaft 2 during rotation, and improving the transmission efficiency. The second shaft portion 4-2 is connected to the base 9. The larger cross-sectional area can improve the stability of the connection between the connecting shaft 4 and the stirring shaft 2 during operation, reduce vibration and sway, and make the stirring device operate more smoothly. It should be noted that the cross-sectional area is the area of ​​the cross-section formed by cutting each shaft portion through a horizontal plane perpendicular to the axis of the connecting shaft 4.

[0038] The present invention also provides a stirrer, including a stirrer body, a stirring shaft 2 installed in the stirrer body, and the stirring shaft fixing mechanism provided above. The stirring shaft 2 of the stirrer is connected to the connecting shaft 4 through a bushing 3, and the opening of the bushing 3 faces downward, which improves the sealing of the connection between the stirring shaft 2 and the connecting shaft 4, prevents impurities from entering, and helps to extend the service life of the stirrer.

[0039] In some embodiments, at least two mixing discs 5 are mounted on the stirring shaft 2, and the mixing discs 5 are arranged at intervals along the length of the stirring shaft 2. A drive shaft 1 is provided at the end of the stirring shaft 2 away from the bushing 3. The drive shaft 1 is connected to a drive component to drive the stirring shaft 2 to rotate. The end of the stirring shaft 2 away from the drive shaft 1 is connected to the bushing 3. The arrangement of multiple mixing discs 5 ensures that the material is mixed more uniformly in the container. Each mixing disc 5 generates shear force at a different height, which helps to break up clumps and promotes the uniform distribution of liquid or solid particles. The mixing discs 5 at different heights produce different mixing effects, forming a three-dimensional mixing flow field, so that the material can be fully mixed in both vertical and horizontal directions.

[0040] To better understand the technical content of this invention, the following description is provided in conjunction with relatively preferred technical features.

[0041] refer to Figures 1 to 4This invention provides a stirring shaft fixing mechanism for connecting a stirring shaft 2 and a stirrer body. It includes a bushing 3 connected to the stirring shaft 2 and a connecting shaft 4. The bushing 3 has a downward-facing receiving groove 3-1. One end of the connecting shaft 4 is installed inside the receiving groove 3-1, and the other end is connected to a base 9 inside the stirrer body. The outer circumferential surface of the connecting shaft 4 is in contact with the inner wall of the receiving groove 3-1. The receiving groove 3-1 has an inlet 3-2 on its side wall, a flow channel 6 connected to the inlet 3-2, and a lubricating medium supply device connected to the end of the flow channel 6 away from the inlet 3-2. The flow channel 6 is located inside the stirring shaft 2. A bearing 7 is installed inside the receiving groove 3-1, located between the inner wall of the receiving groove 3-1 and the outer wall of the connecting shaft 4. The bushing 3 has overflow protrusions 8, which are continuously arranged in a ring along the inner wall of the receiving groove 3-1. The protrusion 8 is located on the outside of the bearing 7. An overflow groove is formed on the outer wall of the connecting shaft 4 to cooperate with the overflow protrusion 8. The overflow protrusion 8 includes a first protrusion 8-1 and a second protrusion 8-2. The first protrusion 8-1 is located on the side close to the bearing 7, and the second protrusion 8-2 is located on the outside of the first protrusion 8-1. The first protrusion 8-1 and the second protrusion 8-2 abut against the overflow groove. The cross-sectional area of ​​the first protrusion 8-1 is larger than the cross-sectional area of ​​the second protrusion 8-2. The overflow groove is structured to be suitable for contacting the entire end face of the first protrusion 8-1 and the second protrusion 8-2. The connecting shaft 4 includes a first shaft portion 4-1 and a second shaft portion 4-2 connected to the first shaft portion 4-1. The first shaft portion 4-1 is connected to the receiving groove 3-1, and the second shaft portion 4-2 is connected to the base 9. The cross-sectional area of ​​the first shaft portion 4-1 is smaller than the cross-sectional area of ​​the second shaft portion 4-2.

[0042] The above technical solution has the following advantages: the stirring shaft 2 and the connecting shaft 4 are connected by the bushing 3, and the opening of the bushing 3 faces downward. Impurities at the connection point are more likely to slide down under the action of gravity. When the stirring shaft 2 rotates, impurities are less likely to enter the bushing 3. This can extend the service life of the bushing 3 and the connecting shaft 4, reduce the frequency of slurry discharge and maintenance of the device, and thus extend the service life of the stirring device.

[0043] The various embodiments of the present invention have now been described in detail. To avoid obscuring the concept of the invention, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0044] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A stirring shaft fixing mechanism for connecting a stirring shaft (2) and a stirrer body, characterized in that, The device includes a bushing (3) connected to the stirring shaft (2) and a connecting shaft (4). The bushing (3) has a downward-facing receiving groove (3-1). One end of the connecting shaft (4) is installed in the receiving groove (3-1), and the other end is connected to the base (9) inside the stirrer body. The outer circumferential surface of the connecting shaft (4) is in contact with the inner wall of the receiving groove (3-1). The stirring shaft fixing mechanism also includes a liquid inlet unit for injecting lubricating medium into the receiving groove (3-1). The liquid inlet unit includes a liquid inlet (3-2) located on the side wall of the receiving groove (3-1), a flow channel (6) connected to the liquid inlet (3-2), and a flow channel (6) connected to the receiving groove (3-1). The flow channel (6) is connected to a lubricating medium supply device at one end away from the liquid inlet (3-2). The flow channel (6) is located inside the stirring shaft (2). A bearing (7) is installed in the accommodating groove (3-1). The bearing (7) is located between the inner wall of the accommodating groove (3-1) and the outer wall of the connecting shaft (4). An overflow protrusion (8) is provided on the bushing (3). The overflow protrusion (8) is arranged continuously in a ring along the inner wall of the accommodating groove (3-1). The overflow protrusion (8) is located on the side close to the opening of the bushing (3). An overflow groove is formed on the outer wall of the connecting shaft (4) to cooperate with the overflow protrusion (8).

2. The stirring shaft fixing mechanism according to claim 1, characterized in that, The overflow protrusion (8) includes a first protrusion (8-1) and a second protrusion (8-2). The first protrusion (8-1) is located on the side close to the bearing (7), and the second protrusion (8-2) is located outside the first protrusion (8-1). Both the first protrusion (8-1) and the second protrusion (8-2) abut against the overflow groove.

3. The stirring shaft fixing mechanism according to claim 2, characterized in that, The cross-sectional area of ​​the first protrusion (8-1) is larger than that of the second protrusion (8-2), and the overflow groove is structured to be in contact with the entire end face of the first protrusion (8-1) and the second protrusion (8-2).

4. The stirring shaft fixing mechanism according to claim 1, characterized in that, The connecting shaft (4) includes a first shaft portion (4-1) and a second shaft portion (4-2) connected to the first shaft portion (4-1). The first shaft portion (4-1) is installed in the receiving groove (3-1), and the second shaft portion (4-2) is connected to the base (9). The cross-sectional area of ​​the first shaft portion (4-1) is smaller than the cross-sectional area of ​​the second shaft portion (4-2).

5. A stirrer, characterized in that, It includes a stirrer body, a stirring shaft (2) installed in the stirrer body, and a stirring shaft fixing mechanism as described in any one of claims 1 to 4.

6. The stirrer according to claim 5, characterized in that, At least two stirring discs (5) are installed on the stirring shaft (2), and the stirring discs (5) are arranged at intervals along the length direction of the stirring shaft (2). A drive shaft (1) is provided at one end of the stirring shaft (2) away from the bushing (3), and the drive shaft (1) is connected to a drive component to drive the stirring shaft (2) to rotate.

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