Impeller structure with sealing groove

Abstract

The utility model discloses an impeller structure with a sealing groove, which relates to the field of impellers and comprises an impeller, an impeller nut is arranged on the front side of the impeller, and a ratchet wheel is fixedly mounted on the outer wall of one end of the impeller nut. Through the arrangement of the impeller, the impeller nut, the sealing grooves and other components, when the impeller is designed, the diameters of the hubs are properly increased, the sealing grooves are formed in the hubs on the front side and the rear side of the impeller, and the corresponding O-shaped rings are assembled in the sealing grooves, so that when the hub on the front side of the impeller is connected with the impeller nut, and the hub on the rear side of the impeller is connected with a mechanical seal, the sealing effect is good; in addition, through the arrangement of a limiting assembly, direction rotation of the impeller nut can be locked, the situation that the threaded connection position between the impeller and the impeller nut is loosened, a medium enters the connection position between the impeller and the pump shaft, and if the medium is corrosive, the pump shaft is corroded is avoided, and the service life of the pump shaft is prolonged. And therefore, the impeller and the pump shaft are clamped together and are difficult to disassemble.

Description

Technical Field

[0001] The utility model relates to the field of impellers, in particular to an impeller structure with a self - contained sealing groove. Background Technique

[0002] The impeller is a component of a water pump, and its performance has a great influence on the entire water pump. In the traditional water pump structure, the impeller is fixed to one end of the pump shaft by an impeller nut.

[0003] At present, the front hub of the impeller commonly used in centrifugal pumps is directly connected to the impeller nut, and the rear hub is directly connected to the mechanical seal. This connection is a rigid connection.

[0004] During actual use, sudden power failure may occur, resulting in the backflow of the medium, causing the impeller to reverse. It is easy for the impeller nut to become loose, and the medium enters the connection between the impeller and the pump shaft. If the medium is corrosive, the pump shaft will be corroded, resulting in the impeller and the pump shaft being stuck together and difficult to disassemble. Therefore, only to a certain extent can the contact between the medium and the pump shaft be blocked, but there is still a phenomenon that the pump shaft will contact the medium, affecting the service life of the pump shaft. To avoid the pump shaft contacting the medium, a very high processing accuracy requirement for the impeller is required. Content of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide an impeller structure with a self - contained sealing groove to solve the technical problems mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An impeller structure with a self - contained sealing groove, including an impeller. An impeller nut is arranged on the front side of the impeller, and a ratchet is fixedly installed on the outer wall of one end of the impeller nut. A number of ratchet teeth are equidistantly arranged along the circumference on the outer wall of the ratchet. A limiting component is arranged on the front - side surface of the impeller, and one end of the limiting component cooperates with the ratchet teeth on the outer wall of the ratchet. An installation chamber is provided in the middle of the impeller. Sealing grooves are opened in the middle of the front and rear sides of the impeller, and O - ring seals are arranged on the front and rear sides of the impeller.

[0007] By adopting the above - mentioned technical solution, when designing the impeller, by appropriately increasing the hub diameter, opening sealing grooves at the front and rear hub positions of the impeller, and assembling corresponding O - rings in the sealing grooves, when the front hub of the impeller is connected to the impeller nut and the rear hub is connected to the mechanical seal, the sealing effect on the pump shaft can be achieved. In addition, through the setting of the limiting component, the rotational direction of the impeller nut can be locked, avoiding problems such as loosening of the threaded connection between the impeller and the impeller nut, the medium entering the connection between the impeller and the pump shaft, the pump shaft being corroded if the medium is corrosive, and the impeller and the pump shaft being stuck together and difficult to disassemble.

[0008] The present utility model is further configured such that an annular groove is formed in the side wall at the rear side of the impeller, a connecting ring is fixedly installed inside the annular groove, and six bolt holes are equidistantly formed in the circumferential direction on the surface of the connecting ring.

[0009] By adopting the above technical solution, the rear hub of the impeller is threadedly installed and connected and sealed with the mechanical equipment through a plurality of bolt holes on the surface of the connecting ring.

[0010] The present utility model is further configured such that the inner wall of the impeller nut has an internal thread, and the outer wall at the front side of the impeller has an external thread that matches the internal thread on the inner wall of the impeller nut.

[0011] By adopting the above technical solution, the impeller and the impeller nut are installed through threaded connection, which is convenient for disassembly and installation.

[0012] The present utility model is further configured such that the limiting assembly includes: a T-shaped rod, the T-shaped rod is fixedly installed on the surface at the front side of the impeller, a moving sleeve is movably installed on the surface of the T-shaped rod, and a limiting block is fixedly connected to the bottom of the moving sleeve. A return spring is sleeved on the surface of the T-shaped rod, and one end of the return spring is fixedly connected to the surface on one side of the moving sleeve, and the other end of the return spring is fixedly connected to the surface at the front side of the impeller.

[0013] By adopting the above technical solution, during the clockwise tightening and installation of the impeller nut towards the front side of the impeller, first, the limiting block is pushed towards the surface of the impeller, and then the impeller nut is threadedly installed on the hub at the front side of the impeller. After the installation is in place, the limiting block is released. At this time, under the elastic reset of the return spring, the limiting block at the bottom of the moving sleeve is pushed towards the position of the ratchet teeth, so that the limiting block is inserted between two adjacent ratchet teeth. The arc surface on one side of the limiting block is placed on the arc surface of the adjacent ratchet tooth, and the other side of the limiting block abuts against the plane of the adjacent ratchet tooth, thereby locking the rotation of the impeller nut, avoiding loosening at the threaded connection between the impeller and the impeller nut, and preventing the medium from entering the connection between the impeller and the pump shaft. If the medium is corrosive, the pump shaft will be corroded, resulting in problems such as the impeller and the pump shaft being stuck together and difficult to disassemble. This enables better blocking of the contact between the medium and the pump shaft and prolongs the service life of the pump shaft.

[0014] The present utility model is further configured such that a sliding groove is formed on the surface of the T-shaped rod, a sliding block is fixedly installed inside the moving sleeve, and the moving sleeve is slidably installed in the sliding groove on the surface of the T-shaped rod through the sliding block inside.

[0015] By adopting the above technical solution, the moving sleeve is slidably installed on the surface of the T-shaped rod, thereby restricting the degree of freedom of rotation of the moving sleeve, enabling the moving sleeve to only move horizontally on the surface of the T-shaped rod, and facilitating the limiting of the ratchet teeth by the limiting block at the bottom of the moving sleeve.

[0016] The present utility model is further configured such that one side of the limiting block is an arc surface, and the other side of the limiting block is a vertical plane.

[0017] By adopting the above technical solution, when the limiting block is inserted between two adjacent ratchet teeth, the arc surface on one side of the limiting block is placed on the arc surface of the adjacent ratchet teeth, and the other side of the limiting block abuts against the plane of the adjacent ratchet teeth, thereby locking the rotation of the impeller nut.

[0018] The present utility model is further configured such that the cross-section of the sealing groove is a V-shaped structure.

[0019] By adopting the above technical solution, after the O-ring is sleeved inside the sealing groove, when the impeller nut on the front side hub of the impeller and the rear side hub of the impeller are installed and sealed with the mechanical equipment in place, the O-ring is filled in the groove of the V-shaped structure by extrusion, which can increase the contact surface between the O-ring and the inner wall of the groove of the sealing groove, and further enhance the sealing effect.

[0020] The present utility model is further configured such that the O-ring is made of fluororubber.

[0021] By adopting the above technical solution, fluororubber has excellent heat resistance, antioxidant property, oil resistance, corrosion resistance and atmospheric aging resistance, which further enhances the sealing performance.

[0022] In summary, the present utility model mainly has the following beneficial effects:

[0023] 1. By setting components such as the impeller, impeller nut and sealing groove in the present utility model, when designing the impeller, by appropriately increasing the hub diameter, and by opening sealing grooves at the front and rear hubs of the impeller, and at the same time assembling corresponding O-rings in the sealing grooves, when the front side hub of the impeller is connected to the impeller nut and the rear side hub is connected to the mechanical seal, the sealing effect on the pump shaft can be achieved. In addition, through the setting of the limiting component, the rotational direction of the impeller nut can be locked, avoiding loosening at the threaded connection between the impeller and the impeller nut, and preventing the medium from entering the connection between the impeller and the pump shaft. If the medium is corrosive, the pump shaft will be corroded, resulting in problems such as the impeller and the pump shaft being stuck together and difficult to disassemble, so that the contact between the medium and the pump shaft can be better blocked, and the service life of the pump shaft can be extended;

[0024] 2. By setting components such as the impeller, sealing groove and O-ring in the present utility model, after the O-ring is sleeved inside the sealing groove, when the impeller nut on the front side hub of the impeller and the rear side hub of the impeller are installed and sealed with the mechanical equipment in place, the O-ring is filled in the groove of the V-shaped structure by extrusion, which can increase the contact surface between the O-ring and the inner wall of the groove of the sealing groove. In this way, neither the processing accuracy needs to be improved nor too much cost needs to be increased, and the sealing effect can be further enhanced. Brief Description of the Drawings

[0025] Figure 1 is the front view schematic diagram of the present utility model;

[0026] Figure 2 is the front sectional view schematic diagram of the present utility model;

[0027] Figure 3 is the left view schematic diagram of the present utility model;

[0028] Figure 4 of the present utility model Figure 3 is the enlarged schematic diagram of the structure at A;

[0029] Figure 5 is the right view schematic diagram of the present utility model.

[0030] In the figure: 1, impeller; 101, installation chamber; 102, annular groove; 2, impeller nut; 3, ratchet; 301, ratchet teeth; 4, limit assembly; 401, T-shaped rod; 402, moving sleeve; 403, limit block; 404, return spring; 5, sealing groove; 6, O-ring seal; 7, connecting ring; 701, bolt hole. Detailed Description of the Preferred Embodiment

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.

[0032] Next, the embodiments of the present utility model will be described according to the overall structure of the present utility model.

[0033] An impeller structure with a self-contained sealing groove, as shown in Figure 1 - Figure 5As shown in the figure, it includes an impeller 1. A impeller nut 2 is arranged on the front side of the impeller 1, and a ratchet 3 is fixedly installed on the outer wall of one end of the impeller nut 2. A number of ratchet teeth 301 are arranged equidistantly along the circumference on the outer wall of the ratchet 3. A limiting component 4 is arranged on the front side surface of the impeller 1, and one end of the limiting component 4 is matched with the ratchet teeth 301 on the outer wall of the ratchet 3. The middle part of the impeller 1 has an installation chamber 101, and one end of the pump shaft is fixedly installed in the installation chamber 101. Sealing grooves 5 are opened in the middle parts on both the front and rear sides of the impeller 1. When the sealing grooves 5 are processed, they are processed according to the matching dimensions of a standard O-ring 6, and O-rings 6 are arranged on both the front and rear sides of the impeller 1. When the impeller is designed, by appropriately increasing the hub diameter, by opening sealing grooves 5 at the hubs on both the front and rear sides of the impeller 1, and at the same time assembling corresponding O-rings in the sealing grooves 5, when the front hub of the impeller is connected to the impeller nut and the rear hub is connected to the mechanical seal, the sealing effect on the pump shaft can be achieved. In addition, through the setting of the limiting component 4, the rotational direction of the impeller nut 2 can be locked to prevent loosening at the threaded connection between the impeller 1 and the impeller nut 2. If the medium enters the connection between the impeller and the pump shaft and the medium is corrosive, the pump shaft will be corroded, resulting in problems such as the impeller and the pump shaft being stuck together and difficult to disassemble, so that the contact between the medium and the pump shaft can be better blocked and the service life of the pump shaft can be extended.

[0034] Please refer to Figure 1 、 Figure 2 and Figure 5 , a circular groove 102 is opened on the side wall at the rear of the impeller 1, and a connecting ring 7 is fixedly installed inside the circular groove 102, and six bolt holes 701 are opened equidistantly along the circumference on the surface of the connecting ring 7. The rear hub of the impeller 1 is threadedly installed and connected to the mechanical equipment through a plurality of bolt holes 701 on the surface of the connecting ring 7 for sealing.

[0035] Please refer to Figure 1 - Figure 2 , the inner wall of the impeller nut 2 has internal threads, and the outer wall of the front side of the impeller 1 has external threads that are matched with the internal threads on the inner wall of the impeller nut 2. The impeller 1 and the impeller nut 2 are installed through threaded connection, which is convenient for disassembly and installation.

[0036] Please refer to Figure 2 - Figure 4, the limiting component 4 includes: a T-shaped rod 401, the T-shaped rod 401 is fixedly installed on the surface of the front side of the impeller 1, a moving sleeve 402 is movably installed on the surface of the T-shaped rod 401, and a limiting block 403 is fixedly connected to the bottom of the moving sleeve 402. A return spring 404 is sleeved on the surface of the T-shaped rod 401, and one end of the return spring 404 is fixedly connected to the surface of one side of the moving sleeve 402, and the other end of the return spring 404 is fixedly connected to the surface of the front side of the impeller 1. During the clockwise tightening and installation of the impeller nut 2 towards the front side of the impeller 1, first, the limiting block 403 is pushed towards the surface of the impeller 1, and then the impeller nut 2 is threadedly installed on the hub on the front side of the impeller 1. After the installation is in place, the limiting block 403 is released. At this time, under the elastic reset of the return spring 404, the limiting block 403 at the bottom of the moving sleeve 402 is pushed towards the position of the ratchet teeth 301, so that the limiting block 403 is inserted between two adjacent ratchet teeth 301. One arc surface of the limiting block 403 is placed on the arc surface of the adjacent ratchet teeth 301, and the other side of the limiting block 403 abuts against the flat surface of the adjacent ratchet teeth 301, thereby locking the rotation of the impeller nut 2 and preventing the threaded connection between the impeller 1 and the impeller nut 2 from becoming loose. If the medium enters the connection between the impeller and the pump shaft and the medium is corrosive, the pump shaft will be corroded, resulting in problems such as the impeller and the pump shaft being stuck together and difficult to disassemble.

[0037] Please refer to Figure 3 - Figure 4 , a chute is provided on the surface of the T-shaped rod 401, a slider is fixedly installed inside the moving sleeve 402, and the moving sleeve 402 is slidably installed in the chute on the surface of the T-shaped rod 401 through the slider inside. By sliding the moving sleeve 402 on the surface of the T-shaped rod 401, the degree of freedom of rotation of the moving sleeve 402 is restricted, so that the moving sleeve 402 can only move horizontally on the surface of the T-shaped rod 401, which is convenient for the limiting block 403 at the bottom of the moving sleeve 402 to limit the ratchet teeth 301.

[0038] Please refer to Figure 3 - Figure 4 , one side of the limiting block 403 is an arc surface, and the other side of the limiting block 403 is a vertical plane. When the limiting block 403 is inserted between two adjacent ratchet teeth 301, one arc surface of the limiting block 403 is placed on the arc surface of the adjacent ratchet teeth 301, and the other side of the limiting block 403 abuts against the flat surface of the adjacent ratchet teeth 301, thereby locking the rotation of the impeller nut 2.

[0039] Please refer to Figure 2, the cross-section of the sealing groove 5 is a V-shaped structure. After the O-ring 6 is sleeved inside the sealing groove 5, when the impeller nut on the front side hub of the impeller and the rear side hub of the impeller are installed and sealed with the mechanical equipment in place, the O-ring 6 is filled in the groove of the V-shaped structure by extrusion, which can increase the contact surface between the O-ring 6 and the inner wall of the groove of the sealing groove 5. In this way, it is neither necessary to improve the machining accuracy nor to increase too much cost, and the sealing effect can be further enhanced.

[0040] Please refer to Figure 1 - Figure 2 , the O-ring 6 is made of fluororubber. Fluororubber has excellent heat resistance, oxidation resistance, oil resistance, corrosion resistance and atmospheric aging resistance, which further enhances the sealing performance.

[0041] The working principle of the present utility model is as follows: During installation, it is necessary to install the impeller nut 2 at the end of the pump shaft with the impeller 1. When the impeller nut 2 is screwed clockwise towards the front side of the impeller 1 for installation, first, the O-ring 6 is assembled inside the sealing groove 5, then the limiting block 403 is pushed towards the surface of the impeller 1, and the impeller nut 2 is threadedly installed on the hub on the front side of the impeller 1. After the installation is in place, the limiting block 403 is released. At this time, under the elastic reset of the return spring 404, the limiting block 403 at the bottom of the moving sleeve 402 is pushed towards the position of the ratchet teeth 301, so that the limiting block 403 is inserted between two adjacent ratchet teeth 301. The arc surface on one side of the limiting block 403 is placed on the arc surface of the adjacent ratchet teeth 301, and the other side of the limiting block 403 abuts against the flat surface of the adjacent ratchet teeth 301, thereby locking the rotation of the impeller nut 2. Then, the rear side hub of the impeller 1 is threadedly installed and connected to the mechanical equipment through the multiple bolt holes 701 on the surface of the connecting ring 7 for sealing. And when the impeller nut on the front side hub of the impeller and the rear side hub of the impeller are installed and sealed with the mechanical equipment in place, the O-ring 6 in the sealing groove 5 is filled in the groove of the V-shaped structure by extrusion, completing the sealing on both the front and rear sides of the impeller.

[0042] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model, and they are not limitations of the utility model. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations that do not contribute creatively to the embodiments according to needs, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. An impeller structure with a self - contained sealing groove, comprising an impeller (1), characterized in that: A impeller nut (2) is provided on the front side of the impeller (1), and a ratchet wheel (3) is fixedly installed on the outer wall of one end of the impeller nut (2). A plurality of ratchet teeth (301) are equidistantly arranged along the circumference on the outer wall of the ratchet wheel (3). A limiting component (4) is arranged on the front surface of the impeller (1), and one end of the limiting component (4) is matched with the ratchet teeth (301) on the outer wall of the ratchet wheel (3). An installation chamber (101) is formed in the middle of the impeller (1). Sealing grooves (5) are formed in the middle of the front and rear sides of the impeller (1). O-ring seals (6) are arranged on the front and rear sides of the impeller (1).

2. The impeller structure with a self - contained sealing groove according to claim 1, characterized in that: A circular groove (102) is formed in the side wall of the rear side of the impeller (1), and a connecting ring (7) is fixedly installed in the circular groove (102). Six bolt holes (701) are equidistantly formed along the circumference on the surface of the connecting ring (7).

3. The impeller structure with a self - contained sealing groove according to claim 1, characterized in that: The inner wall of the impeller nut (2) has internal threads, and the outer wall of the front side of the impeller (1) has external threads that match the internal threads on the inner wall of the impeller nut (2).

4. A impeller structure with a built-in sealing groove according to claim 1, characterized in that: The limiting component (4) includes: a T-shaped rod (401), the T-shaped rod (401) is fixedly installed on the front surface of the impeller (1), a moving sleeve (402) is movably installed on the surface of the T-shaped rod (401), and a limiting block (403) is fixedly connected to the bottom of the moving sleeve (402). A return spring (404) is sleeved on the surface of the T-shaped rod (401), and one end of the return spring (404) is fixedly connected to the surface of one side of the moving sleeve (402), and the other end of the return spring (404) is fixedly connected to the front surface of the impeller (1).

5. A structure of an impeller with a self - contained sealing groove according to claim 4, characterized in that: A sliding groove is formed on the surface of the T-shaped rod (401), a sliding block is fixedly installed inside the moving sleeve (402), and the moving sleeve (402) is slidably installed in the sliding groove on the surface of the T-shaped rod (401) through the sliding block inside.

6. The impeller structure with a self - contained sealing groove according to claim 4, characterized in that: One side of the limiting block (403) is an arc surface, and the other side of the limiting block (403) is a vertical plane.

7. A impeller structure with a built-in sealing groove according to claim 1, characterized in that: The cross section of the sealing groove (5) is a V-shaped structure.

8. A impeller structure with a self - contained sealing groove according to claim 1, characterized in that: The O-ring seal (6) is made of fluororubber material.

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