Anti-falling rotor fixing structure

Abstract

The utility model relates to the technical field of water pumps, in particular to an anti-falling rotor fixing structure, which is characterized in that a screw pair with the same rotating direction as an impeller is arranged at the upper part of a fixing shaft, so that the friction force generated when the impeller rotates continuously drives the screw pair to be fastened with the fixing shaft, the fixing shaft is further prevented from loosening, and the reliability and the safety are high; comprising a lower volute, an upper volute, an impeller and a fixing shaft, the upper volute is installed on the upper portion of the lower volute, a water inlet is formed in the upper portion of the upper volute, a water outlet is formed in the side portion of the upper volute, the impeller is rotatably installed on the upper portion of the fixing shaft, and the lower portion of the fixing shaft is fixedly installed on the lower volute; the centrifugal fan further comprises a threaded connection mechanism, the threaded connection mechanism is installed on the upper portion of the fixing shaft and the lower volute, threads are arranged on the threaded connection mechanism, the rotating direction of the threads is the same as the rotating direction of the impeller during working, and the threaded connection mechanism makes contact with the impeller.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of water pump especially is rotor fixed structure of preventing falling off. BACKGROUND

[0002] Centrifugal water pump is a kind of device for transporting liquid medium, it has wide application in the field of liquid transport.Centrifugal water pump when working, by the centrifugal of impeller rotation produced makes medium be thrown out in impeller, and then vacuum area is generated in the center of impeller, so that the medium of outside is constantly sucked into impeller, so continuous work, realize the continuous delivery of liquid.However, impeller is in the process of medium delivery, simultaneously also can be subjected to the pressure of medium fluctuation, and then the fixing shaft on impeller is subjected to fluctuation thrust, is easy to make impeller shaft fall off on the volute of water pump, and reliability and safety are poor, so a structure that can prevent impeller loosening is needed. SUMMARY

[0003] To solve the above technical problem, the utility model provides a kind of by setting the same spiral pair as impeller rotation direction on the upper portion of fixed shaft, so that the friction force generated when impeller rotates constantly drives spiral pair and fixed shaft fastening, and then prevent fixed shaft from loosening, and the rotor fixed structure of preventing falling off with high reliability and safety.

[0004] The rotor fixed structure of preventing falling off of the utility model, including lower volute, upper volute, impeller and fixed shaft, upper volute is installed on the upper portion of lower volute, the upper portion of upper volute is provided with water inlet, the side portion of upper volute is provided with drain, impeller is rotatably installed on the upper portion of fixed shaft, and the lower portion of fixed shaft is fixedly installed on lower volute;It also includes threaded connection mechanism, threaded connection mechanism is installed on the upper portion of fixed shaft and lower volute, threaded connection mechanism is provided with thread, the rotation direction of spiral is same as the direction of rotation when impeller works, and threaded connection mechanism contacts with impeller;The lower portion of fixed shaft is fixed as a whole with lower volute by injection molding, when impeller works counterclockwise, then the thread on threaded connection mechanism is designed as left-handed thread, then impeller drives threaded connection mechanism to constantly exert force in the direction of fastening when rotating, and then fixed shaft is constantly fastened with threaded connection mechanism, downward extrusion force is exerted to fixed shaft, and then prevent fixed shaft from loosening, and the rotor fixed structure of preventing falling off with high reliability and safety.

[0005] Preferably, the threaded connection mechanism comprises a nut fixedly installed on the lower volute, the upper portion of the fixed shaft is provided with external threads, the rotation direction of the external threads on the fixed shaft and the rotation direction of the threads on the nut are the same as the rotation direction of the impeller during operation, the lower portion of the nut is in contact with the impeller, and the nut is screwed with the upper portion of the fixed shaft; when the impeller rotates counterclockwise during operation, the rotation direction of the threads on the fixed shaft and the nut is designed as left-handed threads, when the impeller rotates counterclockwise, the impeller makes the nut have a tendency to rotate counterclockwise through friction, and then the nut moves in the direction of fastening on the fixed shaft, so as to press the fixed shaft and prevent the fixed shaft from loosening.

[0006] Preferably, the lower portion of the nut is provided with a ceramic gasket, and the lower end of the ceramic gasket is in contact with the impeller; through the above arrangement, friction is generated between the impeller and the ceramic gasket when the impeller rotates, and then the ceramic gasket applies counterclockwise force to the nut, so that the nut has a tendency to rotate counterclockwise, and then the nut is continuously fastened with the fixed shaft, so that the nut has a downward extrusion force on the fixed shaft, preventing the fixed shaft from loosening, and improving the reliability and practicality during use.

[0007] Preferably, the material of the ceramic gasket is ceramic.

[0008] Preferably, an O-shaped sealing ring is arranged between the lower volute and the upper volute; through the above arrangement, the sealing property between the lower volute and the upper volute is improved.

[0009] Compared with the prior art, the utility model has the beneficial effects that: through the arrangement of the same screw pair as the rotation direction of the impeller on the upper portion of the fixed shaft, the friction generated when the impeller rotates continuously drives the screw pair and the fixed shaft to be fastened, thereby preventing the fixed shaft from loosening, and the reliability and safety are high. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is the front view structural schematic diagram of the utility model;

[0011] Figure 2 is Figure 1 the sectional view structural schematic diagram of A-A in the figure;

[0012] Figure 3 is the structural schematic diagram of the fixed shaft and the nut;

[0013] Figure 4 is Figure 1 the structure schematic diagram of the local amplification of A in the figure.

[0014] Markings in the drawings: 1, lower volute; 2, upper volute; 3, impeller; 4, fixed shaft; 5, nut; 6, ceramic gasket; 7, O-shaped sealing ring. DETAILED DESCRIPTION

[0015] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings. The utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0016] Embodiments

[0017] As Figures 1 to 4 , the anti-falling rotor fixing structure comprises a lower volute 1, an upper volute 2, an impeller 3, a fixed shaft 4 and a threaded connection mechanism, the upper volute 2 is installed on the upper portion of the lower volute 1, the upper portion of the upper volute 2 is provided with a water inlet, the side portion of the upper volute 2 is provided with a water outlet, the impeller 3 is rotatably installed on the upper portion of the fixed shaft 4, the lower portion of the fixed shaft 4 is fixedly installed on the lower volute 1, the threaded connection mechanism is installed on the upper portion of the fixed shaft 4 and the lower volute 1, the threaded connection mechanism is provided with threads, the rotation direction of the threads is the same as the rotation direction of the impeller 3 during work, and the threaded connection mechanism is in contact with the impeller 3; the lower portion of the fixed shaft 4 is integrally fixed with the lower volute 1 in a mode of injection molding, when the impeller 3 rotates counterclockwise during work, the threads on the threaded connection mechanism are designed as left-handed threads, the impeller 3 drives the threaded connection mechanism to continuously exert force in the tightening direction during rotation, thereby continuously tightening the fixed shaft 4 and the threaded connection mechanism, downward extrusion force is exerted on the fixed shaft 4, and then the fixed shaft 4 is prevented from loosening, and the reliability and safety are high.

[0018] As Figure 1 , the threaded connection mechanism comprises a nut 5, the nut 5 is fixedly installed on the lower volute 1, the upper portion of the fixed shaft 4 is provided with external threads, the rotation direction of the external threads on the fixed shaft 4 is the same as the rotation direction of the threads on the nut 5 during work of the impeller 3, the lower portion of the nut 5 is in contact with the impeller 3, and the nut 5 is screwed with the upper portion of the fixed shaft 4; when the impeller 3 rotates counterclockwise during work, the rotation direction of the threads on the fixed shaft 4 and the nut 5 is designed as left-handed threads, when the impeller 3 rotates counterclockwise, the impeller 3 makes the nut 5 have a counterclockwise rotation trend through friction force, thereby making the nut 5 move on the fixed shaft 4 in the tightening direction, thereby pressing the fixed shaft 4 tightly and preventing the fixed shaft 4 from loosening.

[0019] As Figure 1 and Figure 4 , the lower portion of the nut 5 is provided with a ceramic gasket 6, and the lower end of the ceramic gasket 6 is in contact with the impeller 3; when the above-mentioned arrangement is made, friction force is generated between the impeller 3 and the ceramic gasket 6 during rotation, thereby exerting counterclockwise force on the nut 5 through the ceramic gasket 6, making the nut 5 have a counterclockwise rotation trend, thereby continuously tightening the nut 5 and the fixed shaft 4, making the nut 5 have downward extrusion force on the fixed shaft 4, preventing the fixed shaft 4 from loosening, and improving the reliability and practicality during use.

[0020] The material of the ceramic gasket 6 is ceramic.

[0021] As Figure 2 An O-shaped sealing ring 7 is arranged between the lower spiral case 1 and the upper spiral case 2, so that the sealing between the lower spiral case 1 and the upper spiral case 2 is improved.

[0022] The nut 5, the ceramic gasket 6 and the O-shaped sealing ring 7 of the anti-falling rotor fixing structure are all purchased on the market, and the technical personnel in the industry only needs to install and operate according to the attached instruction manual, without the technical personnel in the field paying creative labor.

[0023] The above is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, without departing from the technical principle of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection range of the utility model.

Claims

1. A rotor fixing structure for preventing falling off, comprising a lower volute (1), an upper volute (2), an impeller (3) and a fixed shaft (4), wherein the upper volute (2) is mounted on the upper portion of the lower volute (1), a water inlet is provided on the upper portion of the upper volute (2), a drain outlet is provided on the side portion of the upper volute (2), the impeller (3) is rotatably mounted on the upper portion of the fixed shaft (4), and the lower portion of the fixed shaft (4) is fixedly mounted on the lower volute (1); characterized in that: The invention also includes a threaded connection mechanism, which is installed on the upper part of the fixed shaft (4) and the lower volute (1). The threaded connection mechanism is provided with a thread, the direction of the spiral is the same as the direction of rotation of the impeller (3) when working, and the threaded connection mechanism is in contact with the impeller (3).

2. The anti-falling rotor fixing structure according to claim 1, characterized in that: The threaded connection mechanism comprises a nut (5), the nut (5) being fixedly mounted on the lower volute (1), the upper portion of the fixed shaft (4) being provided with an external thread, the rotation direction of the external thread on the fixed shaft (4) and the rotation direction of the thread on the nut (5) being the same as the direction of rotation of the impeller (3) during operation, the lower portion of the nut (5) being in contact with the impeller (3), and the nut (5) being threadedly mounted on the upper portion of the fixed shaft (4).

3. The anti-falling rotor fixing structure according to claim 2, characterized in that: A ceramic gasket (6) is provided at the lower portion of the nut (5), and the lower end of the ceramic gasket (6) is in contact with the impeller (3).

4. The anti-falling rotor fixing structure according to claim 3, characterized in that: The material of the ceramic gasket (6) is ceramic.

5. The anti-falling rotor fixing structure according to claim 1, characterized in that: An O-type sealing ring (7) is provided between the lower volute (1) and the upper volute (2).

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