CN218953633U - Anti-loose structure of impeller nut of centrifugal pump - Google Patents

Abstract

The utility model discloses a centrifugal pump impeller nut locking structure which comprises a pump shaft, wherein an impeller, an inner nut and an outer nut are sequentially arranged on the pump shaft, the inner nut and the outer nut are in opposite rotation directions and are in threaded connection with the pump shaft, a first sealing ring is arranged between the inner nut and the impeller, the inner nut and the impeller are in sliding connection with two positioning columns together, one side end face of the outer nut, which faces the impeller, abuts against the positioning columns, and a second sealing ring is arranged between the inner nut and the outer nut.

Description

Anti-loose structure of impeller nut of centrifugal pump

Technical Field

The utility model relates to the technical field of nuts, in particular to a centrifugal pump impeller nut anti-loosening structure.

Background

The impeller nut has the function of firmly locking the impeller on the pump shaft, and ensuring that the impeller cannot fall off from the pump shaft in the high-speed rotation process, thereby ensuring the safe operation of the impeller and being very widely used in the fields of centrifugal pumps and centrifugal fans.

At present, centrifugal pump impeller nut locking mechanism on the market uses double nut structure to increase screw connection between internal nut and impeller and prevent to rotate, reduced the impeller and rotated the possibility that causes the nut to drop, but increased the screw and increased the installation degree of difficulty, and the screw exposes easy corrosion damage in the liquid and cause the connection inefficacy, finally leads to impeller nut to drop.

Disclosure of Invention

Aiming at the defects existing in the prior art, the utility model aims to provide a centrifugal pump impeller nut anti-loosening structure which is convenient to install and is not easy to rust and damage.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a centrifugal pump impeller nut locking structure, includes the pump shaft, install impeller, interior nut and outer nut on the pump shaft in proper order, interior nut and outer nut revolve to opposite, and all with pump shaft threaded connection, be provided with first sealing washer between interior nut and the impeller, interior nut and the common sliding connection of impeller have two reference columns, outer nut one side terminal surface towards the impeller supports tightly the reference column, be provided with the second sealing washer between interior nut and the outer nut.

The utility model is further provided with: two locating holes are symmetrically formed in the inner nut, two blind holes are formed in the corresponding positions of the impeller mounting surface, and the locating columns are correspondingly connected with the locating holes and the blind holes in a sliding mode.

The utility model is further provided with: the locating hole is offered on the screw thread post along the axial link up, be provided with on the screw thread post deviates from the one side terminal surface of impeller and support the clamping ring, support the inner contraction of outer lane of clamping ring, support the clamping ring and go up along a plurality of shrink grooves of evenly having offered of axial.

The utility model is further provided with: the shrink ring and the mounting groove are arranged on one side of the outer nut, which faces the inner nut, the shrink ring is in a horn shape with an opening facing the inner nut and is movably connected with the pressing ring, and the second sealing ring is arranged in the mounting groove.

The utility model is further provided with: the maximum linear distance between the two positioning holes is smaller than the minimum diameters of the first sealing ring and the second sealing ring.

The utility model has the advantages that the impeller and the inner nut are connected with the positioning column in a sliding way, the outer nut is abutted against the positioning column after being installed, the displacement of the positioning column is limited, the positioning column is enabled to stably limit the relative rotation between the impeller and the inner nut, other installation tools are not needed, and the installation is simple and convenient; the locating column does not need to leave extra installation space, so that the locating column can be arranged in the sealing ring without reducing friction force between two nut contact surfaces, and the locating column is not easy to rust and damage when the double nuts are ensured to be locked stably, so that the service life is prolonged.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of the internal nut structure of the present utility model;

FIG. 3 is a front view of the device shown in FIG. 2;

FIG. 4 is a schematic view of the outer nut of the present utility model;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

in the figure: 1. a pump shaft; 2. an impeller; 3. an inner nut; 301. a threaded column; 302. positioning holes; 303. a pressing ring; 304. a shrink tank; 4. an outer nut; 401. a shrink ring; 402. a mounting groove; 5. positioning columns; 6. a first seal ring; 7. and a second sealing ring.

Detailed Description

It should be noted that, without conflict, the embodiments and features of the embodiments in the present application may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.

In the present utility model, unless otherwise indicated, the terms "upper" and "lower" are used generally with respect to the directions shown in the drawings, or with respect to the vertical, vertical or gravitational directions; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present utility model.

Referring to fig. 1-5, the present utility model provides the following technical solutions:

the utility model provides a centrifugal pump impeller nut locking structure, including pump shaft 1, install impeller 2 on the pump shaft 1 in proper order, interior nut 3 and outer nut 4, interior nut 3 interval sets up on the right side of impeller 2, and with pump shaft 1 left-hand threaded connection, set up first sealing washer 6 between interior nut 3 and the impeller 2, interior nut 3 includes screw thread post 301, two through-holes have been seted up along axial symmetry on the screw thread post 301, locating hole 302 promptly, sliding connection has locating post 5 in the locating hole 302, two blind holes have been seted up on the right-hand member face of impeller 2, and correspond swing joint with two locating posts 5, the terminal surface that outer nut 4 and interior nut 3 meet supports tightly locating post 5 when the installation is accomplished, screw outer nut 4 even make locating post 5 chucking interior nut 3 and impeller 2, do not need extra instrument, it is convenient to install.

The right end face of the inner nut 3 is provided with a pressing ring 303, the outer ring of the pressing ring 303 is inwards contracted, the small diameter end faces the outer nut 4, four contraction grooves 304 are uniformly formed in the pressing ring 303, the left end of the outer nut 4 is provided with a contraction ring 401, the contraction ring 401 is in a horn shape, the small diameter end is rightward corresponding to the pressing ring 303, the diameter of the small diameter end of the contraction ring 401 is slightly smaller than that of the small diameter end of the pressing ring 303, the contraction ring 401 inwards extrudes the pressing ring 303 when the outer nut 4 is screwed, friction force between the inner nut 3 and the outer nut 4 is increased, and the two nuts are mutually locked with each other; the mounting groove 402 has been seted up to the left end face of outer nut 4, has set up second sealing washer 7 in the mounting groove 402, and the biggest straight line distance between two locating holes 302 is less than the minimum diameter of first sealing washer 6 and second sealing washer 7, therefore first sealing washer 6 and second sealing washer 7 make the installed part that includes reference column 5 on the pump shaft 1 all be in sealed environment, avoid the erosion of liquid, prolonged life.

Specifically, the impeller 2 and the inner nut 3 are connected with the positioning column 5 in a sliding manner, the outer nut 4 abuts against the positioning column 5 after being installed, the displacement of the positioning column 5 is limited, the positioning column 5 stably limits the relative rotation between the impeller 2 and the inner nut 3, other installation tools are not needed, and the installation is simple and convenient; the positioning column 5 does not need to leave extra installation space, so that the friction force between the contact surfaces of the two nuts is not reduced by arranging the positioning column in the first sealing ring 6 and the second sealing ring 7, the stable locking of the double nuts is ensured, the positioning column 5 is not easy to rust and damage, and the service life is prolonged.

It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or described herein.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (5)

1. Centrifugal pump impeller nut locking structure, including pump shaft (1), install impeller (2), interior nut (3) and outer nut (4) on pump shaft (1) in proper order, its characterized in that: the inner nut (3) and the outer nut (4) are oppositely rotated and are in threaded connection with the pump shaft (1), a first sealing ring (6) is arranged between the inner nut (3) and the impeller (2), the inner nut (3) and the impeller (2) are connected with two positioning columns (5) in a sliding mode, the outer nut (4) abuts against one side end face of the impeller (2) towards the positioning columns (5), and a second sealing ring (7) is arranged between the inner nut (3) and the outer nut (4).

2. The centrifugal pump impeller nut locking structure according to claim 1, characterized in that: two locating holes (302) are symmetrically formed in the inner nut (3), two blind holes are formed in corresponding positions of the installation surface of the impeller (2), and the locating column (5) is correspondingly connected with the locating holes (302) and the blind holes in a sliding mode.

3. The centrifugal pump impeller nut locking structure according to claim 2, characterized in that: the positioning hole (302) is formed in the threaded column (301) in a penetrating mode along the axial direction, a pressing ring (303) is arranged on the end face of one side, away from the impeller (2), of the threaded column (301), the outer ring of the pressing ring (303) is shrunk inwards, and a plurality of shrinkage grooves (304) are uniformly formed in the pressing ring (303) along the axial direction.

4. A centrifugal pump impeller nut lock structure according to claim 3, characterized in that: shrink ring (401) and mounting groove (402) have been seted up to one side of outer nut (4) towards interior nut (3), shrink ring (401) are the loudspeaker form of opening towards interior nut (3) to with support clamping ring (303) swing joint, second sealing washer (7) set up in mounting groove (402).

5. The centrifugal pump impeller nut locking structure according to claim 4, characterized in that: the maximum linear distance between the two positioning holes (302) is smaller than the minimum diameter of the first sealing ring (6) and the second sealing ring (7).

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