Centrifugal pump provided with impeller nut anti-loosening structure

Abstract

The utility model discloses a centrifugal pump equipped with an impeller nut locking structure, which belongs to the field of centrifugal pumps and comprises an impeller body and a pump shaft, the impeller body is sleeved at one end of the impeller body through a shaft hole arranged on the side wall, and the impeller body is fixedly connected with the impeller body through a nut body. An anti-loosening mechanism is arranged on the side wall of the nut body, the anti-loosening mechanism comprises a fixing column, a movable plate, a fixing rod, a spring, a pressing plate and a limiting block, the arranged anti-loosening mechanism can further form mechanical limiting on the nut body, the nut body is prevented from rotating, the impeller nut is effectively prevented from loosening and falling off, and the service life of the impeller nut is prolonged. Compared with a traditional lock washer anti-loosing structure, the anti-loosing structure has the advantages that the anti-loosing capability is higher, the problem of anti-loosing failure caused by large torque generated by reverse rotation of the impeller body is solved, and the service life of the impeller body is prolonged. It is ensured that the impeller body can be stably fixed to the pump shaft through the nut body under any working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal pump field especially a centrifugal pump with impeller nut anti-loose structure. BACKGROUND

[0002] Centrifugal pump is a kind of mechanical equipment using the centrifugal force generated by impeller rotation to transport liquid, belongs to one kind of vane pump. Its working principle is based on centrifugal force: when driving device (such as motor) drives impeller high-speed rotation, liquid enters the impeller center from the pump inlet axis, obtains radial velocity under the impeller blade push and is thrown to the impeller outer edge, forms high-pressure liquid and is discharged through the flow passage of pump shell. This process is similar to throwing water out with rotating umbrella, realizes continuous transportation by constantly sucking and discharging liquid. Centrifugal pump has the characteristics such as large flow, simple structure, stable operation, is widely used in industrial circulating water system, farmland irrigation, city water supply, chemical process and other fields.

[0003] In prior art, in the actual operation process of centrifugal pump, the looseness of impeller nut has been one of the key factors affecting the stability and reliability of equipment. At present, in order to prevent the loosening of impeller nut, the common technical means is to install a stop washer between the impeller nut and the impeller. The stop washer is clamped in the specific position of the nut and the impeller through the special structure deformation, such as bending, to prevent the nut from rotating, so as to achieve the purpose of anti-loose.

[0004] However, when facing the impeller with very heavy weight, if the impeller appears reverse rotation, due to the huge inertia of the impeller, a considerable torque will be generated on the nut. This torque directly acts on the stop washer, and once it exceeds the strength range that the stop washer can bear, the stop washer is easily cut off. Once the stop washer is cut off, it cannot continue to perform the function of preventing the nut from rotating, and further leads to the failure of the impeller nut anti-loose. The looseness or even the falling off of the impeller nut will make the impeller lose stable fixation during rotation, not only will cause the serious situation of the loosening and falling off of the impeller, but also will cause very serious influence on the normal operation of mechanical equipment, and cause mechanical equipment failure. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a centrifugal pump with impeller nut anti-loose structure, which can effectively solve the problems in the background art.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is:

[0007] The utility model provides a centrifugal pump with impeller nut anti-loose structure, including impeller body and pump shaft, the impeller body is sleeved in one end of impeller body through the shaft hole of the side wall, and the impeller body is also fixedly connected together with the impeller body through the nut body, the side wall of nut body is equipped with anti-loose mechanism, and the anti-loose mechanism includes fixed column, movable plate, fixed link, spring, presser plate and limit block, the fixed column is fixedly connected on the side wall of nut body, and the movable plate is movably connected in the fixed column through the slider of both ends, the fixed link is fixedly connected in the side wall of movable plate, and the outside of fixed link is equipped with a group of symmetrical springs, and the opposite end of symmetrical spring is fixedly connected with presser plate respectively, and the outer side wall of presser plate is fixedly connected with limit block.

[0008] As a further improvement of the utility model, one end of the pump shaft is fixedly installed with a threaded connecting rod, and the threaded connecting rod is threadedly connected with the nut body, a vertical slot is formed in the right end wall of the threaded connecting rod, and limit slots are formed in the top surface and the bottom surface of the slot of the vertical slot.

[0009] As a further improvement of the utility model, the fixed column is fixedly installed on the right end wall of the nut body, and a vertical through opening is formed in the side wall of the fixed column, and sliding grooves are formed in the inner top surface and the bottom surface of the vertical through opening.

[0010] As a further improvement of the utility model, sliders are fixedly installed at the top end and the bottom end of the movable plate, and the sliders are movably installed in the sliding grooves, and a vertical strip-shaped opening is formed in the side wall of the movable plate.

[0011] As a further improvement of the utility model, the fixed link is fixedly installed in the strip-shaped opening, a group of upper and lower symmetrical springs are sleeved on the rod body of the fixed link, the outer side end of the spring is fixedly installed with the inner end wall of the strip-shaped opening, a presser plate is fixedly installed on the inner side end of the spring, a connecting hole is formed in the top surface of the presser plate, the presser plate is movably installed with the fixed link through the connecting hole, and a limit block corresponding to the limit slot is also fixedly installed on the left side of the top surface of the presser plate.

[0012] As a further improvement of the utility model, a guide rod is fixedly installed on the right side of the inner part of the vertical through opening, a horizontal guide opening is also formed in the top surface of the presser plate and located on the right side of the connecting hole, and the presser plate is movably installed with the guide rod through the horizontal guide opening.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model discloses a locking mechanism is provided, and the impeller body is sleeved on the pump shaft through the shaft hole, and after the nut body is fixed on the pump shaft with the threaded connecting rod, the protruding pressing plate on the right side of the fixed column can be pressed to the opposite direction, the pressing plate moves along the fixed rod through the connecting hole, and the spring is forced to stretch, the pressing force on the pressing plate is kept unchanged and the pressing plate is pushed to the left side, the pressing plate moves along the guide rod through the transverse guide opening, and the movable plate moves to the left side in the vertical through -opening through the sliding block, until the left side of the pressing plate enters the vertical slot of the threaded connecting rod, the pressing on the pressing plate is released, the spring is restored to the elastic shrinkage operation, the pressing plate is moved to the outside direction, and the limiting block enters the limiting slot, thereby further forming the mechanical limiting of the nut body, preventing the nut body from rotating, effectively preventing the impeller nut from loosening and falling off, avoiding the collision, falling off and other safety hazards caused by loosening during the rotation of the impeller body, compared with the traditional stop washer locking structure, the locking capacity is stronger, the problem of locking failure caused by large torque generated by the reverse rotation of the impeller body is avoided, and the impeller body can be stably fixed on the pump shaft through the nut body under any working condition, guaranteeing the normal operation of the centrifugal pump. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the overall structure schematic diagram of the utility model;

[0016] Figure 2 It is the overall structure split schematic diagram of the utility model;

[0017] Figure 3 It is the overall structure plane cut schematic diagram of the utility model;

[0018] Figure 4 It is the cut schematic diagram of the threaded connecting rod of the utility model;

[0019] Figure 5 It is the overall structure schematic diagram of the fixed column of the utility model;

[0020] Figure 6 It is the structure split schematic diagram of the locking mechanism of the utility model.

[0021] In the drawing: 1, impeller body;2, shaft hole;3, pump shaft;4, nut body;5, threaded connecting rod;6, locking mechanism;7, vertical slot;8, limiting slot;9, fixed column;10, vertical through -opening;11, sliding groove;12, guide rod;13, movable plate;14, sliding block;15, strip -shaped mouth;16, fixed rod;17, spring;18, pressing plate;19, connecting hole;20, transverse guide opening;21, limiting block. PREFERRED EMBODIMENT

[0022] Clearly and completely describe the technical scheme in the embodiments of the utility model with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments only are a part of embodiments of the utility model, and not all embodiments.

[0023] As shown in Figure 1 - Figure 6 A centrifugal pump with impeller nut anti-loosening structure, including impeller body 1 and pump shaft 3, impeller body 1 is sleeved in one end of impeller body 1 through the shaft hole 2 formed on the side wall, and impeller body 1 is also fixedly connected together with impeller body 1 through nut body 4, the side wall of nut body 4 is provided with anti-loosening mechanism 6, and the anti-loosening mechanism 6 includes fixed column 9, movable plate 13, fixed rod 16, spring 17, pressing plate 18 and limit block 21, the fixed column 9 is fixedly connected on the side wall of nut body 4, and the movable plate 13 is movably connected in the fixed column 9 through the slider 14 at both ends, the fixed rod 16 is fixedly connected in the side wall of movable plate 13, and a group of symmetrical springs 17 is sleeved outside the fixed rod 16, the opposite ends of symmetrical springs 17 are respectively fixedly connected with pressing plate 18, and the outer side wall of pressing plate 18 is fixedly connected with limit block 21.

[0024] As shown in Figure 2 and Figure 4 One end of pump shaft 3 is fixedly installed with threaded connecting rod 5, and nut body 4 is threadedly connected together with threaded connecting rod 5, pump shaft 3 and threaded connecting rod 5 are formed into a whole through fixed installation, which provides basic support for the installation of impeller body 1, the helical line structure of thread between nut body 4 and threaded connecting rod 5 is used, nut body 4 is axially moved along the thread of threaded connecting rod 5 by rotating, the connection and fastening of the two are realized, vertical slot 7 is formed on the right end wall of threaded connecting rod 5, vertical slot 7 can ensure that pressing plate 18 at one end of limit block 21 is moved up and down in it, and limit groove 8 is formed on the top surface and bottom surface in the slot of vertical slot 7 respectively, the limit groove 8 is set based on the mechanical limiting principle, which is used for cooperating with limit block 21 in anti-loosening mechanism to limit the rotation of nut body 4;

[0025] As shown in Figure 5 Fixed column 9 is fixedly installed on the right end wall of nut body 4, and through hole 10 is formed on the side wall of fixed column 9, vertical through hole 10 can make pressing plate 18 realize up and down movement operation, sliding groove 11 is formed on the inner top surface and bottom surface of vertical through hole 10 respectively, sliding groove 11 can cooperate with slider 14 to make movable plate 13 realize horizontal movement operation in vertical through hole 10;

[0026] As shown in Figure 6As shown, the top end and bottom end of the movable plate 13 are fixedly installed with sliding blocks 14, and the sliding blocks 14 are movably installed in the sliding groove 11, and a vertical strip-shaped opening 15 is formed in the side wall of the movable plate 13, the movable plate 13 moves horizontally in the vertical through opening 10 through the sliding blocks 14, and the strip-shaped opening 15 provides a moving space for the up-down movement of the pressing plate 18;

[0027] As shown in the figure, Figure 6 The fixed rod 16 is fixedly installed inside the strip-shaped opening 15, and a group of upper and lower symmetrical springs 17 are sleeved on the rod body of the fixed rod 16, the outer side end of the spring 17 is fixedly installed with the inner end wall of the strip-shaped opening 15, and the inner side end of the spring 17 is fixedly installed with the pressing plate 18, the top surface of the pressing plate 18 is provided with a connecting hole 19, and the pressing plate 18 is movably installed with the fixed rod 16 through the connecting hole 19, and the top surface of the pressing plate 18 is further fixedly installed with a limiting block 21 corresponding to the limiting groove 8, and the symmetrical pressing plates 18 will move along the fixed rod 16 through the connecting hole 19 after being pressed, and force the spring 17 to stretch, and ensure that the pressing plate 18 with the limiting block 21 enters the vertical groove 7, and after the pressing plate 18 loses the pressing force, the spring 17 will perform elastic contraction operation, and drive the pressing plate 18 to reset so that the limiting block 21 enters the limiting groove 8, to form mechanical limiting for the nut body 4, limit the rotation of the nut body 4, and prevent it from loosening;

[0028] As shown in the figure, Figure 6 The right side of the inside of the vertical through opening 10 is fixedly installed with a guide rod 12, and the top surface of the pressing plate 18 and located right side of the connecting hole 19 is further provided with a horizontal guide opening 20, and the pressing plate 18 is movably installed with the guide rod 12 through the horizontal guide opening 20, and the pressing plate 18 moves along the guide rod 12 through the horizontal guide opening 20, which can provide a push for the movable plate 13, and ensure that the pressing plate 18 with the limiting block 21 enters the vertical groove 7.

[0029] The specific use principle of the anti-loose mechanism 6 cooperating with the upper nut body 4 is as follows:

[0030] After the impeller body 1 is sleeved on the pump shaft 3 through the shaft hole 2 formed in the side wall, and the nut body 4 is threadedly connected with the threaded connecting rod 5 at one end of the pump shaft 3, the installation and fixation of the impeller body 1 on the pump shaft 3 are completed, at this time, the vertical through hole 10 formed in the right side wall fixed column 9 of the nut body 4 is aligned with the vertical groove 7 formed in the right end wall of the pump shaft 3, at this time, the upper and lower symmetrical pressing plates 18 protruding to the right side of the fixed column 9 are pressed in the opposite direction by hand, the pressing plates 18 will move relatively in the strip-shaped hole 15 formed in the side wall of the movable plate 13 along the fixed rod 16 and the guide rod 12 through the connecting hole 19 and the horizontal guide hole 20 formed in the top surface after being pressed, and the pressing plates 18 will force the spring 17 sleeved with the fixed rod 16 to stretch until the pressing plates 18 cannot be pressed any more, the pressing force on the pressing plates 18 is kept unchanged, and the pressing plates 18 are pushed to the left side, the pressing plates 18 will move in the vertical through hole 10 formed in the side wall of the fixed column 9 along the guide rod 12 through the horizontal guide hole 20, at the same time, since the pressing plates 18 are movably installed with the fixed rod 16 through the connecting hole 19, the pressing plates 18 will push the movable plate 13 to move to the left side in the vertical through hole 10 synchronously, and the sliders 14 installed at the upper and lower ends of the movable plate 13 will slide in the sliding grooves 11 formed in the inner top surface and bottom surface of the vertical through hole 10, until the pressing plates 18 cannot be pushed any more, one end of the pressing plate 18 installed with the limiting block 21 will be inserted into the vertical groove 7 formed in the right end wall of the threaded connecting rod 5, finally, the pressing force on the pressing plates 18 is released, the spring 17 performs elastic recovery and contraction, drives the pressing plates 18 to move to the outside, and makes the limiting block 21 enter the corresponding limiting groove 8 formed in the vertical groove 7, so that the nut body 4 can be further mechanically limited, since the limiting block 21 is clamped in the limiting groove 8, when the nut body 4 rotates, the nut body 4 can be prevented from rotating, and when the nut body 4 moves in the axial direction, the nut body 4 can be prevented from being displaced, effectively preventing the impeller nut from loosening and falling off, avoiding the safety hazards such as collision and falling off caused by loosening of the impeller body 1 during rotation, compared with the traditional locking washer anti-loosening structure, the anti-loosening ability is stronger, the problem of anti-loosening failure caused by large torque generated by reverse rotation of the impeller body 1 is avoided, and it is ensured that the impeller body 1 can be stably fixed on the pump shaft 3 through the nut body 4 under any working condition, so as to ensure the normal operation of the centrifugal pump, when the impeller body 1 is disassembled subsequently, the pressing plates 18 are pressed and pulled to the right side, and after the pressing force on the pressing plates 18 is released, the nut body 4 is rotated downward from the threaded connecting rod 5, so that the impeller body 1 can be disassembled from the pump shaft 3.

[0031] It is apparent for a person skilled in the art that the present application is not restricted to the details of the above exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary only, and not limiting, the scope of the present application being defined by the appended claims rather than the above description, and all changes coming within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

Claims

1. A centrifugal pump equipped with an impeller nut anti-loosening structure, comprising an impeller body (1) and a pump shaft (3), wherein the impeller body (1) is fitted onto one end of the impeller body (1) through a shaft hole (2) opened on the side wall, and the impeller body (1) is also fixedly connected to the impeller body (1) by a nut body (4), characterized in that: The nut body (4) is provided with an anti-loosening mechanism (6) on its side wall. The anti-loosening mechanism (6) includes a fixed column (9), a movable plate (13), a fixed rod (16), a spring (17), a pressing plate (18), and a limiting block (21). The fixed column (9) is fixedly connected to the side wall of the nut body (4). The movable plate (13) is movably connected to the fixed column (9) through sliders (14) at both ends. The fixed rod (16) is fixedly connected to the side wall of the movable plate (13). A set of symmetrical springs (17) is sleeved on the outside of the fixed rod (16). The opposite ends of the symmetrical springs (17) are respectively fixedly connected to the pressing plate (18). The limiting block (21) is fixedly connected to the outer side wall of the pressing plate (18).

2. A centrifugal pump equipped with an impeller nut anti-loosening structure according to claim 1, characterized in that: One end of the pump shaft (3) is fixedly installed with a threaded connecting rod (5), and the nut body (4) is threadedly connected to the threaded connecting rod (5). A vertical groove (7) is provided on the right end wall of the threaded connecting rod (5), and a limit groove (8) is provided on the top and bottom surfaces of the vertical groove (7).

3. A centrifugal pump equipped with an impeller nut anti-loosening structure according to claim 2, characterized in that: The fixing post (9) is fixedly installed on the right end wall of the nut body (4), and a through vertical opening (10) is provided on the side wall of the fixing post (9). The top and bottom surfaces of the vertical opening (10) are respectively provided with sliding grooves (11).

4. A centrifugal pump equipped with an impeller nut anti-loosening structure according to claim 3, characterized in that: The top and bottom ends of the movable plate (13) are respectively fixedly installed with sliders (14), and the sliders (14) are movably installed in the sliding groove (11). A vertical strip opening (15) is provided on the side wall of the movable plate (13).

5. A centrifugal pump equipped with an impeller nut anti-loosening structure according to claim 4, characterized in that: The fixing rod (16) is fixedly installed inside the strip opening (15), and a set of symmetrical springs (17) are fitted on the rod body of the fixing rod (16). The outer end of the spring (17) is fixedly installed together with the inner end wall of the strip opening (15), and a pressing plate (18) is fixedly installed on the inner end of the spring (17). The top surface of the pressing plate (18) is provided with a connecting hole (19), and the pressing plate (18) is movably installed together with the fixing rod (16) through the connecting hole (19). The left side of the top surface of the pressing plate (18) is also fixedly installed with a limiting block (21) corresponding to the limiting groove (8).

6. A centrifugal pump equipped with an impeller nut anti-loosening structure according to claim 5, characterized in that: A guide rod (12) is fixedly installed on the right side inside the vertical opening (10). A horizontal guide opening (20) is also provided on the top surface of the pressing plate (18) and on the right side of the connecting hole (19). The pressing plate (18) is movably installed together with the guide rod (12) through the horizontal guide opening (20).

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