Impeller nut capable of preventing looseness

Abstract

The utility model discloses an impeller nut capable of preventing looseness, and particularly relates to the technical field of impeller nuts, the impeller nut comprises an impeller shaft body, a limiting lock nut and an impeller nut, the limiting lock nut is installed on the outer surface of a first-stage stud, and the impeller nut is installed on the outer surfaces of a second-stage stud and the limiting lock nut; through the bidirectional limiting structure of the impeller nut and the limiting lock nut, when the impeller nut is subjected to loosening force in the clockwise or anticlockwise direction, mutual restricting force is generated at all meshing positions by means of the characteristic of opposite thread directions, so that the loosening force is converted into the trend of enabling the limiting lock nut to be meshed with the first-stage stud more tightly, and the effect of loosening the impeller nut is achieved. The impeller nut has the advantages that loosening force is effectively counteracted, the nut can still be kept stable under the multi-dimensional stress situation by means of the synergistic effect of opposite threads, the loosening risk is greatly reduced, potential problems can be found in advance by monitoring the vibration condition of the impeller nut in real time, and maintenance personnel can take measures when the problems are still in the germination stage.

Description

TECHNICAL FIELD

[0001] The utility model relates to impeller nut technical field more specifically, the utility model relates to a kind of impeller nut that can prevent loosening. BACKGROUND

[0002] The rotating speed of impeller can be as high as hundreds of thousands of revolutions per minute, and the working environment temperature changes dramatically. Under such working conditions, in order to ensure that the equipment can run safely and efficiently under complex working conditions, a nut structure is used which can effectively prevent loosening and accurately control the connection position.

[0003] After searching, the existing patent (publication number: CN215634295U) discloses a self-locking impeller nut, which comprises a pump shaft, a pump impeller, a screw and an impeller nut. The pump impeller is installed on the pump shaft through key connection. The impeller nut is detachably installed on the end of the pump shaft in the axial direction of the pump shaft. The bottom of the impeller nut completely covers the fitting gap between the pump shaft and the pump impeller. The end face of the pump impeller is provided with four screw holes, which are distributed in a right-angled cross shape. The bottom edge of the impeller nut is provided with a plurality of notches, and the size of the notches is the same as that of the screw holes. The screw is installed in the screw hole through the notch. Through the cooperation of the screw and the notch, it is ensured that the impeller nut and the pump impeller will not rotate relative to each other, preventing the impeller nut from loosening. The inventor found that the existing technology has the following problems in the process of implementing the utility model:

[0004] The existing impeller nut will cause a small displacement of the short pin in the hole when subjected to axial tension or repeated vibration, resulting in loose connection. The contact area between the short pin and the hole is relatively small, and the local stress is easily concentrated when subjected to a large force, reducing the overall stability of the connection. Over time, this can cause the impeller nut to loosen. When the impeller nut and other connecting components loosen, the installation position of the impeller may shift slightly, causing the impeller to rotate eccentrically. Eccentricity can cause unbalanced forces during rotation of the impeller, leading to abnormal vibration. Once an abnormality occurs, due to the high-speed operation of the impeller, it is extremely easy to cause a safety accident.

[0005] Therefore, in view of the above problems, an impeller nut that can prevent loosening is proposed. Utility model content

[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides an impeller nut that can prevent loosening to solve the problems raised in the background art.

[0007] To achieve the above object, the utility model provides following technical scheme: a kind of impeller nut capable of preventing loosening, including impeller shaft body, limit lock nut and impeller nut, the right end of the impeller shaft body is provided with driving shaft, the left end of the impeller shaft body is provided with output shaft, the left end of the output shaft is provided with primary stud, the left end of the primary stud is provided with secondary stud, the limit lock nut is installed on the outer surface of the primary stud, the impeller nut is installed on the outer surface of the secondary stud and the limit lock nut;

[0008] The inner cavity of the impeller nut is provided with a primary thread groove, the left side of the primary thread groove is provided with a secondary thread groove, the inner cavity of the left side of the impeller nut is provided with a mounting groove, the inner cavity of the mounting groove is provided with a vibration sensor, and the left side of the mounting groove is provided with a closure cap.

[0009] Preferably, the diameter of the primary stud is greater than that of the secondary stud, and the primary stud and the secondary stud are arranged in a stepped manner from small to large.

[0010] Preferably, the diameter of the primary thread groove is greater than that of the secondary thread groove, and the primary thread groove and the secondary thread groove are arranged in a stepped manner.

[0011] Preferably, after the secondary stud and the limit lock nut are sequentially sleeved into the impeller nut, they are respectively connected with the secondary thread groove and the primary thread groove.

[0012] Preferably, the threads between the primary stud and the secondary stud are arranged in opposite directions, and the threads between the primary stud, the primary thread groove and the secondary thread groove are arranged in the same direction.

[0013] Preferably, the closure cap is connected with the mounting groove through the bolt, and the inner surface of the mounting groove and the outer surface of the vibration sensor are in abutment with each other.

[0014] The utility model discloses technical effects and advantages:

[0015] Compared with the prior art, the impeller nut capable of preventing loosening has a bidirectional limiting structure of the impeller nut and the limit lock nut, so that when the impeller nut is subjected to a loosening force in the clockwise or counterclockwise direction, a mutual restraining force is generated at each engagement point due to the opposite thread direction, the loosening force is converted into a tendency to make the limit lock nut and the primary stud engage more closely, the loosening force is effectively offset, and the nut can still maintain stability under a multi-dimensional stress situation due to the synergistic effect of the opposite threads, greatly reducing the loosening risk.

[0016] Compared with the prior art, the impeller nut capable of preventing loosening can detect potential problems in advance, and the vibration signal change can be detected when the problem is still in the embryonic stage, so that the maintenance personnel can take measures and perform preventive maintenance before the device appears serious failure, such as impeller nut loosening, impeller imbalance or wear. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of a sectional structure of the utility model.

[0018] Figure 2 It is a schematic view of a sectional structure of the utility model impeller nut.

[0019] Figure 3 It is a schematic view of a sectional structure of the utility model Figure 1 A place local amplification structure schematic view in.

[0020] Figure 4 It is a schematic view of a sectional structure of the utility model.

[0021] The figure sign is: 1, impeller shaft body;2, drive shaft;3, output shaft;4, primary stud;5, secondary stud;6, limit lock nut;7, impeller nut;71, primary thread groove;72, secondary thread groove;8, installation groove;9, vibration sensor;10, closure cover;11, bolt. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model. EMBODIMENT

[0023] As shown in the accompanying drawings Figures 1 to 4 A kind of impeller nut capable of preventing loosening, including impeller shaft body 1, limit lock nut 6 and impeller nut 7, the right end of impeller shaft body 1 is provided with drive shaft 2, the left end of impeller shaft body 1 is provided with output shaft 3, the left end of output shaft 3 is provided with primary stud 4, the left end of primary stud 4 is provided with secondary stud 5, limit lock nut 6 is installed on the outer surface of primary stud 4, impeller nut 7 is installed on the outer surface of secondary stud 5 and limit lock nut 6;

[0024] The inner cavity of the impeller nut 7 is provided with a primary thread groove 71, and the left side of the primary thread groove 71 is provided with a secondary thread groove 72. The left side of the inner cavity of the impeller nut 7 is provided with a mounting groove 8, and the inner cavity of the mounting groove 8 is provided with a vibration sensor 9. The left side of the mounting groove 8 is provided with a closure cover 10, and the four corners of the surface of the closure cover 10 are provided with bolts 11.

[0025] When the device is used, the driving shaft 2 serves as a power input end, and transmits power to the impeller shaft body 1, and then to the output shaft 3. The primary stud 4 and the secondary stud 5 on the left side of the output shaft 3 are used for connecting with other meshing components, preventing loosening. The impeller nut 7 and the limiting lock nut 6 are installed on the output shaft 3, which limits and fixes the position of the impeller on the impeller shaft body 1. The primary thread groove 71 and the secondary thread groove 72 on the impeller nut 7 are used to provide meshing space with the secondary stud 5 and the limiting lock nut 6. The vibration sensor 9 in the mounting groove 8 is used to monitor the vibration during the operation of the device. It can sense the vibration generated by the entire impeller mechanism during operation, and convert the vibration signal into an electrical signal. Through the analysis of these signals, the control terminal can prompt whether there is abnormal vibration caused by component loosening. The vibration sensor 9 in the mounting groove 8 is protected by the closure cover 10, and the connection between the closure cover 10 and the mounting groove 8 can be ensured by tightening the bolts 11. Embodiment

[0026] Based on the embodiment 1, the scheme in embodiment 1 is further refined and introduced in detail in combination with the specific working mode as follows: Figures 1 to 4 as shown in the following description:

[0027] As a preferred embodiment, the diameter of the primary stud 4 is greater than that of the secondary stud 5, and the primary stud 4 and the secondary stud 5 are arranged in a stepped manner from small to large. The outer surface of the primary stud 4 is meshed and connected with the inner surface of the limiting lock nut 6. Further, the stepped design of the primary stud 4 with a larger diameter than the secondary stud 5 provides a more stable installation basis for the limiting lock nut 6, which facilitates the limiting lock nut 6 to pass through the primary stud 4 without being blocked by the threads.

[0028] As a preferred embodiment, the diameter of the primary thread groove 71 is greater than that of the secondary thread groove 72, and the primary thread groove 71 and the secondary thread groove 72 are arranged in a stepped manner. Further, the primary thread groove 71 with a larger diameter than the secondary thread groove 72 can accommodate the limiting lock nut 6, so that the outer surface of the limiting lock nut 6 can be smoothly meshed with the inner cavity of the secondary thread groove 72. The stepped design does not affect the meshing of the threads.

[0029] As a preferred embodiment, the secondary screw post 5 and the limiting lock nut 6 are sequentially sleeved into the impeller nut 7 and are connected with the secondary thread groove 72 and the primary thread groove 71 respectively; further, when the secondary screw post 5 and the secondary thread groove 72 and the limiting lock nut 6 and the primary thread groove 71 are connected respectively, a multi-level close connection structure is formed, and the connection mode makes the components intermesh and tightly fit and be constrained, thereby greatly enhancing the close connection.

[0030] As a preferred embodiment, the threads between the primary screw post 4 and the secondary screw post 5 are arranged in opposite directions, and the threads between the primary screw post 4, the primary thread groove 71 and the secondary thread groove 72 are arranged in the same direction; further, the bidirectional thread structure of the intermeshing components effectively prevents the nut from loosening and generates a counterforce, thereby greatly improving the stability of the connection and reducing the risk of equipment failure caused by nut loosening.

[0031] As a preferred embodiment, the closure cover 10 is connected with the mounting groove 8 through the bolt 11, and the inner surface of the mounting groove 8 and the outer surface of the vibration sensor 9 abut each other; further, the closure cover 10 is firmly connected with the mounting groove 8 through the bolt 11, and the mounting groove 8 forms a relatively closed space to wrap the vibration sensor 9.

[0032] The working process of the utility model is as follows: firstly, the outer surface of the primary screw post 4 is provided with threads, and the inner surface of the limiting lock nut 6 is also provided with matching threads, and the output shaft 3 side of the impeller shaft body 1 is combined, the driving shaft 2 transmits the output power of the transmission system to the impeller shaft body 1, because the diameter of the primary screw post 4 is larger than that of the secondary screw post 5 and is distributed in a stepped manner, and the limiting lock nut 6 is specially installed on the outer surface of the primary screw post 4, during installation, the limiting lock nut 6 is moved and rotated along the axial direction of the primary screw post 4, so that the inner threads of the limiting lock nut 6 and the outer threads of the primary screw post 4 gradually intermesh and are screwed, with the rotation operation, the limiting lock nut 6 will gradually move to the appropriate position along the threads of the primary screw post 4, and finally realize the close intermeshing connection, the outer surface of the secondary screw post 5 is provided with threads, and the hole diameter of the secondary thread groove 72 is matched with the size of the secondary screw post 5, when installing, the impeller nut 7 is sleeved from one end of the secondary screw post 5, so that the secondary screw post 5 gradually enters the inner cavity of the impeller nut 7, with the movement of the impeller nut 7, the outer threads of the secondary screw post 5 will contact and intermesh with the secondary thread groove 72 of the impeller nut 7, by rotating the impeller nut 7, the secondary screw post 5 will gradually screw and penetrate along the threads of the secondary thread groove 72, until the installation position required by the design is reached, thereby realizing the close intermeshing connection of the two;

[0033] The inner cavity of the impeller nut 7 is provided with a primary thread groove 71, which has a larger hole diameter than the secondary thread groove 72 and is distributed in a stepped manner. On the basis of having been engaged with the primary stud 4, the outer surface of the limiting lock nut 6 gradually contacts the inner surface of the primary thread groove 71 of the impeller nut 7 during the operation of sleeving the impeller nut 7 into the secondary stud 5 and the limiting lock nut 6. Since the primary thread groove 71 and the secondary thread groove 72 are distributed in a stepped manner, and the hole diameter of the primary thread groove 71 is larger, the outer surface of the limiting lock nut 6 can be accommodated. Similarly, by rotating the impeller nut 7, the outer surface thread of the limiting lock nut 6 is engaged and screwed with the inner thread of the primary thread groove 71 of the impeller nut 7, and finally the engagement and connection of the two are realized. The bidirectional thread structure generates a counteracting force, so that the impeller nut 7, the limiting lock nut 6 and the secondary stud 5 form a whole that is mutually restricted and tightly fitted, and the impeller is limited on one side of the output shaft 3. When the impeller nut 7 is working normally, the vibration of the components is within a certain range, which is determined by pre-test or design parameters of the equipment. The vibration sensor 9 monitors the frequency and amplitude of the vibration signal in real time in the inner cavity of the mounting groove 8. The closed cover 10 is fixed to one side of the mounting groove 8 by four bolts 11, and the vibration sensor 9 is packaged. When the impeller nut 7 and other parts have abnormal conditions such as loosening, imbalance, wear, etc., the frequency and amplitude of the vibration will change. After the vibration sensor 9 detects abnormal vibration, it will send the signal to the control terminal through wireless communication. The above is the working principle of the impeller nut that can prevent loosening.

Claims

1. A loose-proof impeller nut, comprising an impeller shaft body (1), a limiting lock nut (6) and an impeller nut (7), characterized in that: The right end of the impeller shaft body (1) is provided with a driving shaft (2), the left end of the impeller shaft body (1) is provided with an output shaft (3), the left end of the output shaft (3) is provided with a primary stud (4), the left end of the primary stud (4) is provided with a secondary stud (5), the limiting lock nut (6) is installed on the outer surface of the primary stud (4), and the impeller nut (7) is installed on the outer surface of the secondary stud (5) and the limiting lock nut (6). The inner cavity of the impeller nut (7) is provided with a primary thread groove (71), the left side of the primary thread groove (71) is provided with a secondary thread groove (72), the inner cavity of the left side of the impeller nut (7) is provided with a mounting groove (8), the inner cavity of the mounting groove (8) is provided with a vibration sensor (9), and the left side of the mounting groove (8) is provided with a closure cover (10). The surface of the closure cover (10) is provided with a bolt (11).

2. A loose-tight impeller nut according to claim 1, wherein: The diameter of the primary stud (4) is greater than that of the secondary stud (5), the primary stud (4) and the secondary stud (5) are arranged in a stepped manner from small to large, and the outer surface of the primary stud (4) is engaged with the inner surface of the limiting lock nut (6).

3. A loose-tight impeller nut according to claim 1, wherein: The hole diameter of the primary thread groove (71) is greater than that of the secondary thread groove (72), and the primary thread groove (71) and the secondary thread groove (72) are arranged in a stepped manner.

4. The anti-loose impeller nut according to claim 2, wherein: After the secondary stud (5) and the limiting lock nut (6) are sequentially sleeved into the impeller nut (7), they are respectively engaged with the secondary thread groove (72) and the primary thread groove (71).

5. A loose-tight impeller nut according to claim 3, wherein: The threads between the primary stud (4) and the secondary stud (5) are arranged in opposite directions, and the threads between the primary stud (4), the primary thread groove (71) and the secondary thread groove (72) are arranged in the same direction.

6. A loose-tight impeller nut according to claim 1, wherein: The closure cover (10) is connected with the mounting groove (8) through the bolt (11), and the inner surface of the mounting groove (8) and the outer surface of the vibration sensor (9) are in abutment with each other.

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