CN217950751U

CN217950751U - Centrifugal pump shaft convenient to impeller installation

Info

Publication number: CN217950751U
Application number: CN202221753137.0U
Authority: CN
Inventors: 张伯涛; 李易骁; 李伟
Original assignee: Wuxi Weima Machinery Co ltd
Current assignee: Wuxi Weima Machinery Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-12-02
Anticipated expiration: 2032-07-07

Abstract

The utility model discloses a centrifugal pump shaft convenient for impeller installation, which comprises a pump shaft body, wherein one end of the pump shaft body is provided with a shaft sleeve, one side of the pump shaft body is provided with an installation rod, an impeller bottom cover, an impeller body and an impeller top cover are sequentially arranged on the installation rod from left to right, and one end of the installation rod is in threaded connection with a cap-shaped nut; with the impeller bottom, the impeller body, the impeller top cap is established on the installation pole in proper order from a left side to the right side, and screw through first nut with the one end that first mounting hole was worn out to first screw rod, the one end that the second mounting hole was worn out to the second screw rod is screwed through the second nut, at last through screwing on the installation pole with the nut that covers shape, promote the impeller top cap, impeller body and impeller bottom closely laminate, and make the impeller bottom support the right side at the axle sleeve, thereby realize need not to carry out the trompil on the terminal surface of pump shaft, also can realize the quick installation operation to the impeller, be favorable to improving the rigidity of pump shaft, prolong its life.

Description

Centrifugal pump shaft convenient to impeller installation

Technical Field

The utility model relates to a centrifugal pump shaft technical field specifically is a centrifugal pump shaft convenient to impeller installation.

Background

When the existing centrifugal pump shaft is assembled with a centrifugal pump impeller, in order to reduce residual vibration generated when the centrifugal pump is used, the assembly error of the impeller and the pump shaft needs to be adjusted manually, and the technical requirements on assembly personnel are also overhigh.

For example, chinese patent No. CN209800348U discloses a centrifugal pump impeller mounting and fixing device, which includes a pump shaft, a positioning guide mechanism, a cushion pad and an impeller body; the pump shaft end face is provided with a plurality of guide holes and a plurality of clamping holes, the end face of the pump shaft is further fixed with a limiting column, a plurality of first mounting holes are distributed on the periphery of the limiting column, the positioning guide mechanism comprises a guide ring matched with the pump shaft, a plurality of guide columns penetrate through the inner side of the guide ring, one ends of the guide columns are fixed with connecting blocks, the connecting blocks are connected with limiting convex strips, and the other ends of the guide columns are matched with the guide holes; the impeller body comprises an impeller base, an impeller mounting plate and an impeller cover plate, the impeller base is matched with the end face of the pump shaft, a plurality of second sliding holes distributed along the circumference are formed in the inner side wall of the impeller base, the impeller mounting plate is fixedly mounted on the impeller base, a limiting hole matched with a limiting column is formed in the center of the impeller mounting plate, a plurality of second mounting holes are distributed in the periphery of the limiting hole, and fixing bolts sequentially penetrate through the second mounting holes and the first mounting holes to fix the impeller mounting plate.

However, the above scheme has the following disadvantages: the accuracy and the convenience of assembly between pump shaft and the impeller are improved to above-mentioned patent, but adopt the operation mode of directly carrying out the trompil at the terminal surface of pump shaft, can lead to the whole rigidity decline of pump shaft, cause the not enough problem of safety margin of pump shaft.

Therefore, a centrifugal pump shaft convenient for mounting an impeller is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centrifugal pump shaft convenient to impeller mounting to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a centrifugal pump shaft convenient for impeller installation comprises a pump shaft body, wherein one end of the pump shaft body is provided with a shaft sleeve, a step hole is formed in the shaft sleeve, the diameters of the two ends of the step hole are respectively matched with the diameters of the pump shaft body and an installation rod, one side of the pump shaft body is provided with the installation rod, an impeller bottom cover, the impeller body and an impeller top cover are sequentially arranged on the installation rod from left to right, one side of the impeller top cover is provided with a ring groove, a fixing ring is arranged in the ring groove, one side of the fixing ring is provided with a gasket, one side of the gasket is abutted against the impeller body, and one end of the installation rod is in threaded connection with a cap-shaped nut;

one side of the impeller bottom cover is provided with four first screw rods, the shaft sleeve is provided with four first mounting holes, the diameter of the impeller bottom cover is larger than that of the shaft sleeve, the shaft sleeve is of a convex sleeve structure, and one end, penetrating out of the first screw rods and corresponding to the first mounting holes, of each first screw rod is locked through a first nut;

one side of impeller body is provided with four second screw rods, impeller body's outer wall is provided with five blades, and is adjacent be equidistance evenly distributed between the blade, the impeller bottom is equipped with four second mounting holes, four the one end that the second mounting hole was worn out to the second screw rod is passed through the second nut and is locked.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses during the installation, with the impeller bottom, the impeller body, the impeller top cap is established in proper order on the installation pole from a left side to the right side, and screw through first nut with the one end that first mounting hole was worn out to first screw rod, the one end that the second mounting hole was worn out to the second screw rod is screwed through the second nut, at last through screwing on the installation pole with the nut that appears, promote the impeller top cap, impeller body and impeller bottom closely laminate, and make the impeller bottom support the right side at the axle sleeve, thereby realize need not to carry out the trompil on the terminal surface of pump shaft, also can realize the quick installation operation to the impeller, be favorable to improving the rigidity of pump shaft, prolong its life.

Drawings

FIG. 1 is a schematic view of the structure of the present invention;

fig. 2 is a front sectional view of fig. 1 of the present invention;

fig. 3 is an enlarged schematic view of fig. 2 at a point a according to the present invention;

fig. 4 is a left side view structure diagram of the present invention.

In the figure: 1. a pump shaft body; 2. a shaft sleeve; 201. a stepped bore; 3. mounting a rod; 4. an impeller bottom cover; 5. an impeller body; 51. a blade; 6. an impeller head cover; 7. a cap nut; 8. a first screw; 9. a first mounting hole; 10. a first nut; 11. a second screw; 12. a second mounting hole; 13. a second nut; 14. an annular groove; 15. a stationary ring; 16. a gasket.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1-4, the present invention provides a technical solution: the utility model provides a centrifugal pump shaft convenient to impeller installation, including pump shaft body 1, the one end interference cover of pump shaft body 1 is equipped with axle sleeve 2, be equipped with step hole 201 in the axle sleeve 2, the both ends diameter size of step hole 201 respectively with pump shaft body 1 and the diameter size adaptation of installation pole 3, the right side of pump shaft body 1 is provided with installation pole 3, pump shaft body 1 and installation pole 3 are CNC integrative, the cover is equipped with impeller bottom 4 from a left side to the right side in proper order on the installation pole 3, impeller body 5 and impeller top cap 6, the outer wall welding of impeller body 5 has five blades 51, and be equidistance evenly distributed between the adjacent blade 51, the one end threaded connection of installation pole 3 has lid shape nut 7, the direction of screwing of lid shape nut 7 is square the same with the rotation of pump shaft body 1, through with lid shape nut 7 on installation pole 3, promote impeller top cap 6, impeller body 5 and impeller bottom 4 closely laminate, and make impeller bottom 4 support the right side at axle sleeve 2, accomplish the installation to the impeller.

The left side of the impeller bottom cover 4 is welded with four first screw rods 8, four first mounting holes 9 are formed in the positions, corresponding to the first screw rods 8, on the shaft sleeve 2, one ends, penetrating out of the first screw rods 8 and corresponding to the first mounting holes 9, are locked through first nuts 10, the diameter of the impeller bottom cover 4 is larger than that of the shaft sleeve 2, the shaft sleeve 2 is made of polyether-ether-ketone materials, the shaft sleeve 2 is of a convex sleeve structure, and one end, with the larger outer diameter, of the shaft sleeve 2 is in contact with the impeller bottom cover 4;

four second screw rods 11 are fixedly mounted on the left side of the impeller body 5 through bolts, four second mounting holes 12 are formed in the positions, corresponding to the second screw rods 11, of the impeller bottom cover 4, and one ends, penetrating out of the second mounting holes 12, of the four second screw rods 11 are locked through second nuts 13.

An annular groove 14 is formed in the left side of the impeller top cover 6, a fixing ring 15 is embedded into the annular groove 14, a gasket 16 is arranged on the left side of the fixing ring 15, the fixing ring 15 and the gasket 16 are an injection molding integrated piece and made of soft silica gel, and the left side of the gasket 16 abuts against the impeller body 5.

The working principle of the embodiment is as follows: during the installation, with impeller bottom 4, impeller body 5, impeller top cap 6 is established in proper order on installation pole 3 from a left side to the right side, and screw first screw rod 8 one end of wearing out first mounting hole 9 through first nut 10, the one end that second screw rod 11 wore out second mounting hole 12 is screwed through second nut 13, screw at last through covering shape nut 7 on installation pole 3, promote impeller top cap 6, impeller body 5 and impeller bottom 4 closely laminate, and make impeller bottom 4 support the right side at axle sleeve 2, thereby the realization need not to carry out the trompil on the terminal surface of pump shaft, also can realize the quick installation operation to the impeller, be favorable to improving the rigidity of pump shaft, prolong its life.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a centrifugal pump shaft convenient to impeller installation, includes pump shaft body (1), its characterized in that: a shaft sleeve (2) is arranged at one end of the pump shaft body (1), an installation rod (3) is arranged on one side of the pump shaft body (1), an impeller bottom cover (4), an impeller body (5) and an impeller top cover (6) are sequentially arranged on the installation rod (3) from left to right, and a cover-shaped nut (7) is connected to one end of the installation rod (3) in a threaded manner;

one side of the impeller bottom cover (4) is provided with four first screw rods (8), the shaft sleeve (2) is provided with four first mounting holes (9), and one end of each first screw rod (8) penetrating through the corresponding first mounting hole (9) is locked through a first nut (10);

one side of the impeller body (5) is provided with four second screw rods (11), the impeller bottom cover (4) is provided with four second mounting holes (12), and the four ends, penetrating out of the second mounting holes (12), of the second screw rods (11) are locked through second nuts (13).

2. A centrifugal pump shaft for facilitating impeller mounting according to claim 1, wherein: an annular groove (14) is formed in one side of the impeller top cover (6), a fixing ring (15) is arranged in the annular groove (14), a gasket (16) is arranged on one side of the fixing ring (15), and one side of the gasket (16) abuts against the impeller body (5).

3. A centrifugal pump shaft for facilitating impeller mounting according to claim 1, wherein: the pump shaft is characterized in that a step hole (201) is formed in the shaft sleeve (2), and the diameters of the two ends of the step hole (201) are matched with the diameters of the pump shaft body (1) and the mounting rod (3) respectively.

4. A centrifugal pump shaft for facilitating impeller mounting according to claim 1, wherein: the diameter of the impeller bottom cover (4) is larger than that of the shaft sleeve (2), and the shaft sleeve (2) is of a convex sleeve structure.

5. A centrifugal pump shaft for facilitating impeller mounting according to claim 1, wherein: the outer wall of impeller body (5) is provided with five blades (51), and is adjacent be equidistance evenly distributed between blade (51).