Sealing structure for matching position of impeller and shaft of anti-corrosion pump

Abstract

The utility model relates to the technical field of anti-corrosion pumps, and discloses an anti-corrosion pump impeller and shaft matching position sealing structure which comprises an impeller body and a composite transmission shaft, a composite T-shaped hole is formed in the middle of the impeller body, reinforcing shafts are fixed to the inner walls of the two ends of the composite T-shaped hole respectively, and internal threads are formed in the inner walls of the two ends of the composite T-shaped hole respectively. The composite transmission shaft comprises a main connecting shaft and an external thread hollow shaft, and one end of the main connecting shaft is provided with a connecting hole connected with the reinforcing shaft in a clamped mode. According to the utility model, a multi-layer sealing structure is formed by the first corrosion-resistant sealing ring, the second corrosion-resistant sealing ring and the third corrosion-resistant sealing ring; in the follow-up assembling process of the impeller body and the composite transmission shaft, the locking connection position of the impeller body and the external thread hollow shaft and the locking connection position of the main connecting shaft and the external thread hollow shaft can be sealed and filled in a jacking mode, and the sealing effect between face structures after the impeller body and the composite transmission shaft are assembled is fully guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of anti-corrosion pump technology, specifically a sealing structure at the junction of the impeller and shaft of an anti-corrosion pump. Background Technology

[0002] Corrosion-resistant pumps, as a type of pump with corrosion resistance, are mostly made of stainless steel and are suitable for pumping, circulating, and discharging all chemical liquids and sewage containing acidic or alkaline corrosive components. They are now widely used in industries such as electroplating, electronics, chemicals, leather, dyeing and finishing wastewater, and exhaust gas, and have a wide range of applications.

[0003] Currently, with the increasing application range of corrosion-resistant pumps and the diversification of their operating environments, the structural shortcomings of corrosion-resistant pumps are also being exposed. For example, in the existing technology, the connection between the impeller and the shaft inside the corrosion-resistant pump is mostly achieved by first threading and then sealing with sealant. Although this connection method can meet the basic sealing effect, with the extension of service time, the design of a single sealing structure is prone to sealing failure due to structural wear. Therefore, in order to address the above problems, the applicant will provide a sealing structure at the joint between the impeller and the shaft of the corrosion-resistant pump. Utility Model Content

[0004] This invention provides a sealing structure at the joint between the impeller and shaft of a corrosion-resistant pump, which solves the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a sealing structure at the mating point of a corrosion-resistant pump impeller and shaft, comprising an impeller body and a composite drive shaft. A composite T-shaped hole is provided in the middle of the impeller body. A reinforcing shaft and an internal thread are respectively fixed to the inner walls at both ends of the composite T-shaped hole. The composite drive shaft includes a main connecting shaft and an externally threaded hollow shaft. A connecting hole is provided at one end of the main connecting shaft to engage with the reinforcing shaft. The externally threaded hollow shaft is engaged with the outer side of the other end of the main connecting shaft and can be helically locked with the internal thread provided in the composite T-shaped hole after the main connecting shaft and the reinforcing shaft are spliced ​​and assembled.

[0006] A first damping ring is installed in the gap between one end of the main connecting shaft and the inner side of the composite T-hole. A first corrosion-resistant sealing ring is installed in the gap between the end of the external thread hollow shaft away from the impeller body and one side surface of the impeller body. A first threaded hole is opened on the stepped surface of the other end of the main connecting shaft. A first countersunk hole aligned with the first threaded hole is opened at the end of the external thread hollow shaft away from the impeller body. The main connecting shaft and the external thread hollow shaft can be detachably installed by screwing into the countersunk hole and then spirally engaging with the threaded hole.

[0007] Preferably, the number of reinforcing shafts and the number of connecting holes are the same and set to four. The four reinforcing shafts are equidistantly arranged on the inner wall of one end of the composite T-hole along the circumference of the composite T-hole, and the four connecting holes are equidistantly arranged on the end of one end of the main connecting shaft along the circumference of the main connecting shaft.

[0008] Preferably, a first annular groove is provided at one end of the main connecting shaft, and the first damping ring fills the annular space formed between the first annular groove and the inner wall of one end of the composite T-hole during the splicing process of the main connecting shaft through the connecting hole and the reinforcing shaft.

[0009] Preferably, a second annular groove is formed on the surface of the hollow shaft away from the impeller body. The first corrosion-resistant sealing ring is snapped into and filled in the second annular groove and tightly fitted to one side of the impeller body during the assembly of the hollow shaft and the impeller body.

[0010] Preferably, a second threaded hole is provided on one side of the impeller body, and a second countersunk hole aligned with the second threaded hole is provided at the end of the hollow shaft away from the impeller body, and a second assembly screw capable of threaded connection with the second threaded hole is fitted inside the second countersunk hole.

[0011] Preferably, the connection gap between the stepped surface of the main connecting shaft and the inner wall of the end of the hollow shaft away from the impeller body is filled with a second corrosion-resistant sealing ring and a third corrosion-resistant sealing ring, and the second corrosion-resistant sealing ring and the third corrosion-resistant sealing ring are arranged concentrically.

[0012] Preferably, the surface of the hollow shaft with external thread away from the impeller body is provided with a linkage ring groove and several arc-shaped through grooves. The several arc-shaped through grooves are arranged along the circumference of the hollow shaft with external thread and are all connected to the linkage ring groove. A buffer structure is provided in the linkage ring groove.

[0013] The buffer structure includes a second damping ring and several metal springs. The number of metal springs is the same as the number of arc-shaped through slots and they are nested one by one inside the arc-shaped through slots. The second damping ring is fitted into the linkage ring slot and can synchronously press against the several metal springs after the hollow shaft with external thread is assembled with the impeller body.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model, through the multi-layer sealing structure formed by the first, second, and third corrosion-resistant sealing rings, can seal and fill the locking connection between the impeller body and the externally threaded hollow shaft, and the locking connection between the main connecting shaft and the externally threaded hollow shaft, respectively, by pressing during the subsequent assembly of the impeller body and the composite drive shaft. This fully ensures the sealing effect between the surface structures of the impeller body and the composite drive shaft after assembly. Compared with traditional sealants, the multi-layer sealing structure not only further ensures the sealing connection strength, but also provides the convenience of subsequent disassembly and replacement, thereby meeting the continuous use requirements of the main structure of the overall device and reducing the cost of use.

[0016] 2. This utility model uses a first damping ring to passively dampen and absorb energy by linking the impeller body and the main connecting shaft. The second damping ring receives the vibration energy output from the composite transmission shaft and links the metal spring sheet for damping and structural deformation energy absorption. This provides multiple buffer protection for the overall device, maintaining the high-strength sealing effect of the first, second, and third corrosion-resistant sealing rings, and fully ensuring the continuous sealing effect between the structures of the overall device. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the impeller body of the present invention;

[0019] Figure 3 This is a right-side view of the impeller body of the present invention.

[0020] Figure 4 This is a three-dimensional schematic diagram of the composite transmission shaft of this utility model;

[0021] Figure 5 The structure of this utility model Figure 1 Enlarged view of point A in the middle;

[0022] Figure 6 This is a cross-sectional schematic diagram of the second damping ring of the present invention.

[0023] In the diagram: 1. Impeller body; 2. Composite drive shaft; 21. Main connecting shaft; 22. Externally threaded hollow shaft; 23. Connecting hole; 24. Second assembly screw; 3. Composite T-hole; 4. Reinforcing shaft; 5. First corrosion-resistant sealing ring; 6. Second corrosion-resistant sealing ring; 7. Third corrosion-resistant sealing ring; 8. First damping ring; 9. Second damping ring; 10. Metal spring; 11. Second assembly screw. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-5 A sealing structure for the mating of a corrosion-resistant pump impeller and shaft includes an impeller body 1 and a composite drive shaft 2. A composite T-shaped hole 3 is provided in the middle of the impeller body 1. A reinforcing shaft 4 and an internal thread are respectively fixed to the inner walls of both ends of the composite T-shaped hole 3. The composite drive shaft 2 includes a main connecting shaft 21 and an externally threaded hollow shaft 22. A connecting hole 23 is provided at one end of the main connecting shaft 21 to engage with the reinforcing shaft 4. The externally threaded hollow shaft 22 is engaged with the outer side of the other end of the main connecting shaft 21 and can be spirally locked with the internal thread provided in the composite T-shaped hole 3 after the main connecting shaft 21 and the reinforcing shaft 4 are spliced ​​and assembled.

[0026] The number of reinforcing shafts 4 and the number of connecting holes 23 are the same and set to four. The four reinforcing shafts 4 are equidistantly arranged on the inner wall of one end of the composite T-hole 3 along the circumference of the composite T-hole 3. The four connecting holes 23 are equidistantly arranged on one end of the main connecting shaft 21 along the circumference of the main connecting shaft 21. After the four reinforcing shafts 4 are assembled with the main connecting shaft 21 through the same number of connecting holes 23 as clearance space, it will provide favorable conditions for the axial load during the assembly and use of the composite transmission shaft 2 and the impeller body 1.

[0027] A first damping ring 8 is installed to fill the gap between one end of the main connecting shaft 21 and the inner side of the composite T-hole 3. A first corrosion-resistant sealing ring 5 is installed to fill the gap between the end of the external thread hollow shaft 22 away from the impeller body 1 and one side surface of the impeller body 1. A second annular groove is opened on the surface of the end of the external thread hollow shaft 22 away from the impeller body 1. The first corrosion-resistant sealing ring 5 is snapped into the second annular groove and tightly fitted to one side of the impeller body 1 during the assembly of the external thread hollow shaft 22 and the impeller body 1 to ensure a sealing connection effect. A first screw hole is opened on the stepped surface of the other end of the main connecting shaft 21. A first countersunk hole aligned with the first screw hole is opened at the end of the external thread hollow shaft 22 away from the impeller body 1. The main connecting shaft 21 and the external thread hollow shaft 22 can be detachably installed by screwing and countersunk hole fitting and then spirally engaging with screw hole.

[0028] A second threaded hole is provided on one side of the impeller body 1. A second countersunk hole aligned with the second threaded hole is provided at the end of the externally threaded hollow shaft 22 away from the impeller body 1. A second assembly screw 11 that can be threadedly connected to the second threaded hole is fitted inside the second countersunk hole. This improves the assembly strength of the composite drive shaft 2 and the impeller body 1, and further enhances the axial load performance during the combined use of the composite drive shaft 2 and the impeller body 1.

[0029] The gap between the stepped surface of the main connecting shaft 21 and the inner wall of the external thread hollow shaft 22 away from the impeller body 1 is filled with a second corrosion-resistant sealing ring 6 and a third corrosion-resistant sealing ring 7. The second corrosion-resistant sealing ring 6 and the third corrosion-resistant sealing ring 7 are arranged concentrically, thereby sealing and protecting the locking structure between the main connecting shaft 21 and the external thread hollow shaft 22.

[0030] In use, for the impeller body 1 and composite drive shaft 2 after assembly, a multi-layer sealing structure formed by the first corrosion-resistant sealing ring 5, the second corrosion-resistant sealing ring 6, and the third corrosion-resistant sealing ring 7 is used to seal and fill the locking connection between the impeller body 1 and the external thread hollow shaft 22 and the locking connection between the main connecting shaft 21 and the external thread hollow shaft 22 by being pressed. This fully ensures the sealing effect between the surface structures of the impeller body 1 and the composite drive shaft 2 after assembly. Compared with traditional sealant, in addition to further ensuring the sealing connection strength, it also has the convenience of subsequent disassembly and replacement, thereby meeting the continuous use requirements of the main structure of the overall device and reducing the cost of use.

[0031] Secondly, after the impeller body 1 and the composite drive shaft 2 are combined, the assembly of the four reinforcing shafts 4 and the main connecting shaft 21 can fully ensure that the circumferential load of the impeller body 1 and the composite drive shaft 2 assembly during rotation can fully meet the usage requirements.

[0032] Please see Figures 1-6 The main connecting shaft 21 has a first annular groove at one end. The first damping ring 8 fills the annular space formed between the first annular groove and the inner wall of one end of the composite T-hole 3 during the splicing process of the main connecting shaft 21 through the connecting hole 23 and the reinforcing shaft 4.

[0033] The surface of the hollow shaft 22 with external thread away from the impeller body 1 is provided with a linkage ring groove and several arc-shaped through grooves. The several arc-shaped through grooves are arranged along the circumference of the hollow shaft 22 with external thread and are all connected to the linkage ring groove. A buffer structure is provided in the linkage ring groove. The buffer structure includes a second damping ring 9 and several metal spring pieces 10. The number of metal spring pieces 10 is the same as the number of arc-shaped through grooves and they are nested one by one inside the arc-shaped through grooves. The second damping ring 9 is fitted in the linkage ring groove and can synchronously press against the several metal spring pieces 10 after the hollow shaft 22 with external thread is assembled with the impeller body 1.

[0034] When in use, considering that the sealing effect of the first corrosion-resistant sealing ring 5, the second corrosion-resistant sealing ring 6, and the third corrosion-resistant sealing ring 7 may decrease due to vibration during continuous use, the second damping ring 9, the metal spring 10, and the first damping ring 8 are used for multiple buffering. The specific principle is as follows.

[0035] The first damping ring 8, in conjunction with the impeller body 1 and the main connecting shaft 21, passively dampes and absorbs energy. At the same time, the second damping ring 9 receives the vibration energy output from the composite drive shaft 2 and, in conjunction with the metal spring 10, dampes and absorbs energy through structural deformation. This achieves multiple buffer protection for the assembly formed by the impeller body 1 and the composite drive shaft 2, thereby maintaining the high-strength sealing effect of the first corrosion-resistant sealing ring 5, the second corrosion-resistant sealing ring 6, and the third corrosion-resistant sealing ring 7.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Additionally, in the accompanying drawings of this utility model, the fill patterns are merely for distinguishing layers and do not constitute any other limitation.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anticorrosion seal structure for the joint between a pump impeller and a shaft, comprising an impeller body (1) and a composite transmission shaft (2), characterized in that: The middle part of the impeller body (1) is provided with a composite T-shaped hole (3), the inner wall of both ends of the composite T-shaped hole (3) is respectively fixed with a reinforcing shaft (4) and is provided with an internal thread, the composite transmission shaft (2) comprises a main connecting shaft (21) and an external thread hollow shaft (22), one end of the main connecting shaft (21) is provided with a connecting hole (23) which is connected with the reinforcing shaft (4), the external thread hollow shaft (22) is connected with the outer side of the other end of the main connecting shaft (21) and can be screw-locked with the internal thread arranged in the composite T-shaped hole (3) after the main connecting shaft (21) and the reinforcing shaft (4) are spliced and assembled. The first damping ring (8) is filled and installed in the gap between the one end of the main connecting shaft (21) and the inside of the composite T-shaped hole (3), the first corrosion-resistant sealing ring (5) is filled and installed in the connecting gap between the one end of the external thread hollow shaft (22) away from the impeller body (1) and the surface of one side of the impeller body (1), the first screw hole is arranged on the stepped surface of the other end of the main connecting shaft (21), the first countersunk hole is arranged on the end of the one end of the external thread hollow shaft (22) away from the impeller body (1), and the main connecting shaft (21) and the external thread hollow shaft (22) can be detachably installed by screwing the screw hole and the countersunk hole.

2. The anti-corrosion seal structure for the joint between the pump impeller and the shaft according to claim 1, characterized in that: The number of the reinforcing shafts (4) and the connecting holes (23) is four, and the four reinforcing shafts (4) are equidistantly arranged and installed on the inner wall of one end of the composite T-shaped hole (3) along the circumference of the composite T-shaped hole (3), and the four connecting holes (23) are equidistantly arranged on the end of one end of the main connecting shaft (21) along the circumference of the main connecting shaft (21).

3. The anti-corrosion seal structure for the junction of the pump impeller and the shaft according to claim 1, characterized in that: The first annular groove is arranged on the end of one end of the main connecting shaft (21), and the first damping ring (8) fills and installs the annular space between the first annular groove and the inner wall of one end of the composite T-shaped hole (3) during the splicing process of the main connecting shaft (21) and the reinforcing shaft (4) through the connecting hole (23).

4. The anti-corrosion pump impeller and shaft joint sealing structure according to claim 1, characterized in that: The second annular groove is arranged on the surface of the one end of the external thread hollow shaft (22) away from the impeller body (1), and the first corrosion-resistant sealing ring (5) is connected and filled in the second annular groove during the splicing process of the external thread hollow shaft (22) and the impeller body (1) and tightly abuts against one side of the impeller body (1).

5. The anti-corrosion pump impeller and shaft joint sealing structure according to claim 1, characterized in that: The second screw hole is arranged on one side of the impeller body (1), the second countersunk hole is arranged on the one end of the external thread hollow shaft (22) away from the impeller body (1) and is aligned with the second screw hole, and the second assembly screw (11) which can be threadedly connected with the second screw hole is sleeved in the second countersunk hole.

6. The anti-corrosion pump impeller and shaft joint sealing structure according to claim 1, characterized in that: The second corrosion-resistant sealing ring (6) and the third corrosion-resistant sealing ring (7) are filled in the connecting gap between the stepped surface of the main connecting shaft (21) and the inner wall of the one end of the external thread hollow shaft (22) away from the impeller body (1), and the second corrosion-resistant sealing ring (6) and the third corrosion-resistant sealing ring (7) are arranged with the same center.

7. The anti-corrosion pump impeller and shaft joint sealing structure according to claim 1, characterized in that: The outer thread hollow shaft (22) is provided with a linkage ring groove and a plurality of arc-shaped through grooves on the end surface away from the impeller body (1), the plurality of arc-shaped through grooves are arranged along the circumference of the outer thread hollow shaft (22) and are all communicated with the linkage ring groove, and a buffering structure is arranged in the linkage ring groove; The buffering structure comprises a second damping ring (9) and a plurality of metal elastic sheets (10), the plurality of metal elastic sheets (10) are the same in number as the plurality of arc-shaped through grooves and are nested in the plurality of arc-shaped through grooves one by one, and the second damping ring (9) is sleeved in the linkage ring groove and can synchronously press the plurality of metal elastic sheets (10) after the outer thread hollow shaft (22) is assembled with the impeller body (1).

Images