Anti-loose sleeve structure of centrifugal pump impeller

Abstract

The utility model discloses an anti-loose sleeve structure for an impeller of a centrifugal pump. The anti-loose sleeve structure comprises the impeller, an anti-loose piece, a mounting shaft and a limiting piece. One end of the mounting shaft is connected with the driving piece, and the other end of the mounting shaft penetrates through the impeller and is connected with the limiting piece; an anti-loosening piece is arranged between the limiting piece and the impeller; and the anti-loosening piece is arranged on the outer side of the limiting piece in a sleeving mode and connected with the limiting piece in a clamped mode, one end of the anti-loosening piece abuts against the limiting piece, the other end of the anti-loosening piece abuts against the end face of the impeller, and the anti-loosening piece is configured to prevent the limiting piece from rotating. The technical problem that in the prior art, an impeller nut is prone to loosening under complex working conditions is solved, simple and reliable mechanical locking of the impeller nut is achieved, and meanwhile abrasion caused by rotation of an anti-loosening structure is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pumps, and particularly relates to a centrifugal pump impeller anti-loose sleeve structure. BACKGROUND

[0002] In the field of rotating machinery, such as pump, fan and other equipment, the impeller is usually installed on the driving shaft through a key structure and axially locked by using an impeller nut. The loosening of the impeller nut is a long-standing technical problem. In particular, in harsh working conditions such as chemical pumps, factors such as medium corrosion and vibration impact exacerbate the risk of loosening and falling off of the impeller nut. Once loosening occurs during high-speed operation, not only the axial movement of the impeller may be caused, affecting the performance and operation accuracy of the equipment, but also friction between the impeller and the pump body may be caused, resulting in mechanical failures such as shaft head damage, and even safety accidents.

[0003] At present, common anti-loose measures include using thread locking glue, adding locking washers or relying on high-precision pre-tightening force control, but there are still problems of short-term effect, great influence of operator experience and easy failure in long-term vibration and corrosion environment.

[0004] Therefore, there is an urgent need for a mechanical anti-loose structure with simple structure and reliable locking. CONTENT OF THE UTILITY MODEL

[0005] The centrifugal pump impeller anti-loose sleeve structure provided by the embodiment of the present application solves the technical problem of easy loosening of the impeller nut in the prior art under complex working conditions, and achieves simple and reliable mechanical locking of the impeller nut.

[0006] The embodiment of the utility model provides a centrifugal pump impeller anti-loose sleeve structure, including impeller, anti-loose piece, installation shaft and limiting piece, one end of installation shaft is connected with driving piece, the other end of installation shaft passes through impeller and is connected with limiting piece, limiting piece is connected with anti-loose piece between impeller, anti-loose piece is set on the outside of limiting piece and is connected with limiting piece, one end of anti-loose piece is connected with limiting piece, the other end of anti-loose piece is connected with the end surface of impeller, and anti-loose piece is configured to prevent the rotation of limiting piece.

[0007] In a possible implementation, the anti-loose piece includes a thin-walled portion, a connecting portion, and a mounting portion; one end of the thin-walled portion is connected to one end of the connecting portion, and the other end of the connecting portion is connected to the mounting portion; the thin-walled portion is sleeved on the outside of the limiting piece and is connected with the limiting piece; the end surface of the limiting piece is in abutment with one end of the connecting portion, and the other end of the connecting portion is in abutment with the end surface of the impeller; the thin-walled portion is configured to prevent the rotation of the limiting piece; and the mounting portion is arranged between the mounting shaft and the impeller.

[0008] In a possible implementation, the mounting portion is provided with a pin hole, the impeller is provided with a groove, one end of the pin is arranged in the pin hole, and the other end of the pin is arranged in the groove, so that the anti-loosening piece is prevented from rotating relative to the impeller.

[0009] In a possible implementation, the mounting shaft is connected with the impeller through a key.

[0010] In a possible implementation, the mounting portion is provided with a pin hole, the impeller is provided with a groove, one end of the pin is arranged in the pin hole, and the other end of the pin is arranged in the groove, so that the anti-loosening piece is prevented from rotating relative to the impeller.

[0011] In a possible implementation, the thin-wall portion has a thickness of 0.5 mm to 2 mm.

[0012] In a possible implementation, the limiting piece includes a nut, one end of the mounting shaft is connected with a driving piece, the other end of the mounting shaft passes through the impeller and is threadedly connected with the nut, the thin-wall portion is arranged on the outer side of the nut and is clamped with the nut, and the end face of the nut is abutted with the connecting portion.

[0013] The one or more technical solutions provided in the application have at least the following technical effects:

[0014] The centrifugal pump impeller anti-loosening sleeve structure provided in the application embodiment includes an impeller, an anti-loosening piece, a mounting shaft and a limiting piece, the anti-loosening piece is arranged between the limiting piece and the impeller, the anti-loosening piece is further arranged on the outer side of the limiting piece and can be clamped with the limiting piece, so that the problem that the impeller nut is prone to loosening in a vibration and corrosion environment is effectively solved, direct and reliable mechanical locking of the impeller nut is achieved, the durability and vibration resistance of locking are greatly improved, and meanwhile, through cooperation of the anti-loosening piece and the impeller, rotation friction of the anti-loosening piece itself in the circumferential direction is avoided, so that the overall service life is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the application, the following will briefly introduce the drawings needed to be used in the description of the application embodiments. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 FIG. 1 is a schematic view of a centrifugal pump impeller anti-loosening sleeve structure provided in the application embodiment;

[0017] Figure 2 FIG. 2 is a schematic view of an impeller provided in the application embodiment;

[0018] Figure 3 A schematic view of a groove provided for an embodiment of the present application;

[0019] Figure 4 A schematic view of an anti-loosening piece provided for an embodiment of the present application;

[0020] Figure 5 A schematic view of an anti-loosening piece after adding a pin provided for an embodiment of the present application.

[0021] Icon: 1-impeller; 11-groove; 2-anti-loosening piece; 21-thin wall part; 22-connection part; 221-sealing ring groove; 23-mounting part; 231-pin hole; 3-mounting shaft; 4-limiting piece; 5-pin. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium; can be the communication between two elements inside. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0024] The embodiments of the present application provide a centrifugal pump impeller anti-loosening sleeve structure, like Figures 1-4As shown, the device comprises an impeller 1, a locking piece 2, a mounting shaft 3 and a limiting piece 4; one end of the mounting shaft 3 is connected with a driving piece, the other end of the mounting shaft 3 passes through the impeller 1 and is connected with the limiting piece 4; the locking piece 2 is arranged between the limiting piece 4 and the impeller 1; the locking piece 2 is sleeved on the outside of the limiting piece 4 and is clamped with the limiting piece 4; one end of the locking piece 2 abuts against the limiting piece 4, and the other end of the locking piece 2 abuts against the end face of the impeller 1; the locking piece 2 is configured to prevent the limiting piece 4 from rotating.

[0025] As shown in the embodiment of the present application, Figures 1-4 the locking piece 2 comprises a thin-walled part 21, a connecting part 22 and a mounting part 23; one end of the thin-walled part 21 is connected with one end of the connecting part 22, and the other end of the connecting part 22 is connected with the mounting part 23; the thin-walled part 21 is sleeved on the outside of the limiting piece 4 and is clamped with the limiting piece 4; the end face of the limiting piece 4 abuts against one end of the connecting part 22, and the other end of the connecting part 22 abuts against the end face of the impeller 1; the thin-walled part 21 is configured to prevent the limiting piece 4 from rotating; and the mounting part 23 is arranged between the mounting shaft 3 and the impeller 1.

[0026] For example, the locking piece 2 is an integral structure, the mounting part 23 is matched with the hub end face of the impeller 1 by a stopper, so as to ensure that the locking piece 2 is coaxial with the impeller 1 and is in close contact with the impeller 1. The thin-walled part 21 is a cylinder structure extending outwards, and the inner diameter of the thin-walled part 21 is slightly larger than the diameter of the limiting piece 4, so as to facilitate the sleeving. During assembly, the limiting piece 4 is first screwed to be in close contact with the end face of the connecting part 22, and then a tool is used to knock the thin-walled part 21 along the radial direction, so that the thin-walled part 21 is deformed and pressed tightly to the side face of the limiting piece 4, that is, the thin-walled part 21 is plastically deformed and tightly attached to the side face of the limiting piece 4, a direct mechanical locking is formed, and thus the limiting piece 4 is prevented from rotating in the reverse direction and loosening.

[0027] For example, the connecting part 22 is a force-bearing structure and a sealing structure, and the end faces thereof are in close contact with the end faces of the limiting piece 4 and the impeller 1 respectively, so as to transmit the axial compression force and form a sealing basis. When the mounting part 23 is axially inserted into the hub end of the impeller 1, the connecting part 22 can provide axial positioning.

[0028] As shown in the embodiment of the present application, Figures 1-5 the device further comprises a pin 5; a pin hole 231 is arranged on the mounting part 23; a groove 11 is arranged on the impeller 1; one end of the pin 5 is arranged in the pin hole 231, and the other end of the pin 5 is arranged in the groove 11, so that the pin 5 can prevent the locking piece 2 from rotating relative to the impeller 1.

[0029] The pin 5 is pre-welded or interference-fitted into the pin hole 231 of the anti-loosening piece 2. During assembly, the pin 5 is aligned with the axial groove 11 on the hub of the impeller 1, and the pin 5 is inserted into the groove 11. This cooperation can effectively limit the circumferential rotation of the anti-loosening piece 2 along with the mounting shaft 3 or the limiting piece 4 during operation, thereby avoiding friction between the end face of the connecting portion 22 and the end face of the impeller 1, and ensuring the long-term reliability of the anti-loosening effect of the anti-loosening piece 2.

[0030] During assembly, the pin 5 is aligned with the groove 11 on the hub of the impeller 1, the mounting portion 23 is pushed into the hub of the impeller 1, and then the limiting piece 4 is sleeved onto the end portion of the mounting shaft 3 and tightened until the limiting piece 4 is in contact with the end face of the connecting portion 22. The pin 5 is clamped into the groove 11 on the hub of the impeller 1, which can limit the anti-loosening piece 2 in the circumferential direction, thereby preventing the anti-loosening piece 2 from rotating.

[0031] In the embodiment of the present application, as shown in Figures 1-4 The mounting shaft 3 is connected to the impeller 1 by a key.

[0032] In the embodiment of the present application, as shown in Figures 1-4 The end face of the connecting portion 22 is provided with a sealing ring groove 221, and the sealing member is arranged in the sealing ring groove 221.

[0033] The sealing member is an O-shaped sealing ring, which is arranged in the sealing ring groove 221 on the end face of the connecting portion 22. When the anti-loosening piece 2 is pressed against the end face of the impeller 1, the O-shaped ring can form a sealing barrier between the anti-loosening piece 2 and the impeller 1, thereby effectively preventing the medium from penetrating and corroding the threads of the shaft head, and improving the sealing reliability and corrosion resistance of the entire assembly.

[0034] In the embodiment of the present application, as shown in Figures 1-4 The thickness of the thin-walled portion 21 is 0.5mm-2mm.

[0035] The thickness of the thin-walled portion 21 is preferably designed to be in the range of 0.5mm to 2mm. The metal material in this thickness range has good plastic deformation capability, can be firmly attached to the side surface of the limiting piece 4 by appropriate knocking force, thereby forming reliable locking; and at the same time, the metal material in this thickness range has sufficient strength and will not easily break due to accidental collision or vibration.

[0036] In the embodiment of the present application, as shown in Figures 1-4 The limiting piece 4 includes a nut; one end of the mounting shaft 3 is connected to a driving member, the other end of the mounting shaft 3 passes through the impeller 1 and is threadedly connected to the nut; the thin-walled portion 21 is sleeved on the outside of the nut and is clamped with the nut; and the end face of the nut is in abutment with the connecting portion 22.

[0037] Preferably, the limiting member 4 is a hexagonal nut. The thin-walled portion 21 is sleeved on the outside of the hexagonal nut, and after being struck and deformed, can be tightly engaged with several sides of the nut. By using the edge effect of the polygon of the nut, the rotation of the anti-loosening member 2 can be more effectively prevented.

[0038] The various embodiments in the specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the difference from other embodiments.

[0039] The above examples are only used to illustrate the technical solutions of the present application, and are not limited to the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present application.

Claims

1. A centrifugal pump impeller anti-loosening sleeve structure, characterized in that, It includes an impeller (1), an anti-loosening component (2), a mounting shaft (3), and a limiting component (4); One end of the mounting shaft (3) is connected to the drive component, and the other end of the mounting shaft (3) passes through the impeller (1) and is connected to the limiting component (4); The anti-loosening component (2) is provided between the limiting component (4) and the impeller (1); The anti-loosening component (2) is sleeved on the outside of the limiting component (4) and engaged with the limiting component (4). One end of the anti-loosening component (2) abuts against the limiting component (4), and the other end of the anti-loosening component (2) abuts against the end face of the impeller (1). The anti-loosening component (2) is configured to prevent the limiting component (4) from rotating.

2. The anti-looseness sleeve structure of the centrifugal pump impeller according to claim 1, characterized in that, The anti-loosening component (2) includes a thin-walled part (21), a connecting part (22), and a mounting part (23). One end of the thin-walled portion (21) is connected to one end of the connecting portion (22), and the other end of the connecting portion (22) is connected to the mounting portion (23); The thin-walled portion (21) is sleeved on the outside of the limiting member (4) and is engaged with the limiting member (4); The end face of the limiting member (4) abuts against one end of the connecting part (22), and the other end of the connecting part (22) abuts against the end face of the impeller (1). The thin-walled part (21) is configured to prevent the limiting member (4) from rotating. The mounting part (23) is disposed between the mounting shaft (3) and the impeller (1).

3. The anti-looseness cover structure of the centrifugal pump impeller according to claim 2, characterized in that, It also includes pins (5); The mounting part (23) is provided with a pin hole (231); The impeller (1) has grooves (11); One end of the pin (5) is located in the pin hole (231), and the other end of the pin (5) is located in the groove (11). The pin (5) can prevent the anti-loosening component (2) from rotating relative to the impeller (1).

4. The anti-looseness cover structure of the centrifugal pump impeller according to claim 1, characterized in that, The mounting shaft (3) is connected to the impeller (1) by a key.

5. The anti-looseness cover structure of the centrifugal pump impeller according to claim 2, characterized in that, It also includes seals; A sealing ring groove (221) is provided on the end face of the connecting part (22), and the sealing element is disposed in the sealing ring groove (221).

6. The anti-looseness cover structure of the centrifugal pump impeller according to claim 2, characterized in that, The thickness of the thin-walled portion (21) is 0.5 mm to 2 mm.

7. The anti-looseness cover structure of the centrifugal pump impeller according to claim 2, characterized in that, The limiting component (4) includes a nut; One end of the mounting shaft (3) is connected to the drive component, and the other end of the mounting shaft (3) passes through the impeller (1) and is threadedly connected to the nut; The thin-walled portion (21) is sleeved on the outside of the nut and engages with the nut; The end face of the nut abuts against the connecting part (22).

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