CN219426676U - Multistage pump flat key dismouting device - Google Patents
Multistage pump flat key dismouting device Download PDFInfo
- Publication number
- CN219426676U CN219426676U CN202223510242.4U CN202223510242U CN219426676U CN 219426676 U CN219426676 U CN 219426676U CN 202223510242 U CN202223510242 U CN 202223510242U CN 219426676 U CN219426676 U CN 219426676U
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- upper top
- top plate
- flat key
- plate
- pressing plate
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- 238000003825 pressing Methods 0.000 claims abstract description 57
- 230000002146 bilateral effect Effects 0.000 claims description 6
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000007689 inspection Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model belongs to the technical field of flat key dismounting tools, and particularly relates to a multi-stage pump flat key dismounting device, which comprises an upper top plate, a lower pressing plate and supporting bolts, wherein the upper top plate and the lower pressing plate are annular, the inner diameters of the upper top plate and the lower pressing plate are equal to the diameter of a pump shaft, the upper top plate and the lower pressing plate are coaxially and parallelly arranged outside the pump shaft, two groups of concave key grooves which are symmetrically distributed left and right are formed in the inner sides of the upper top plate and the lower pressing plate, and each group of concave key grooves comprises two concave key grooves which are symmetrically distributed up and down; the upper top plate is fixedly connected with the lower pressing plate through a supporting bolt and a limiting nut. The utility model can rapidly and effectively realize the disassembly and assembly of the flat keys of the multistage pump during the maintenance of the multistage pump, is convenient for maintenance personnel to operate, improves the disassembly and assembly efficiency of the multistage pump, realizes nondestructive disassembly and inspection, and avoids larger economic loss caused by damaging parts.
Description
Technical Field
The utility model belongs to the technical field of flat key dismounting tools, and particularly relates to a flat key dismounting device of a multistage pump.
Background
In chemical production, the multistage pump is widely applied to various devices due to the characteristics of high lift, large flow range, wide application range and the like, and the multistage pump is changed into a structure form with various materials, types, kinds and diversification according to the requirements of different production parameters such as the specificity, pressure, flow and the like of a flowing medium in the pump, so that the overhaul process of the multistage pump is different. In particular to a high-pressure liquid oxygen pump and a high-pressure liquid nitrogen pump used in an air separation device, because of the specificity of fluid media, parts such as an impeller, a mouth ring, a shaft sleeve and the like in the pump are all made of copper alloy and aluminum alloy, so that the positioning of the impellers in each stage in the pump body is facilitated, and a spring gasket and an adjusting gasket are designed in the pump. However, in the assembly process of the pump, because the number of stages of the impellers is large, spring gaskets of the impellers at all stages are not effectively compressed, so that the extension of spring pieces at all stages is large and the spring pieces interfere with the key grooves of the impellers, so that flat keys of the impellers at all stages cannot be installed, the reloading of parts in the pump body is influenced, because the special properties of fluid materials in the pump body, the impellers, the mouth rings, the shaft sleeves and the like are all made of copper alloy and aluminum alloy, the materials are softer and are high in price, the stress is small, and other installation modes such as pressing the impellers are easy to damage parts in the pump body, so that great economic loss is caused. Meanwhile, when the multistage pump is disassembled, the spring gasket is effectively compressed, so that compression force of each stage of impellers and parts of the pump body is large, and therefore the flat key is difficult to take, if the flat key is damaged easily by knocking, chiseling and other modes, the flat key and the shaft are damaged easily, and therefore, how to quickly disassemble and assemble the flat key of the impeller of the multistage pump is a key for overhauling the multistage pump.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a multi-stage pump flat key dismounting device, which can quickly and effectively realize the dismounting of the multi-stage pump flat key during the maintenance of the multi-stage pump, is convenient for maintenance personnel to operate, improves the dismounting efficiency of the multi-stage pump, realizes nondestructive dismounting and inspection, and avoids larger economic loss caused by damaging parts.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a flat key dismounting device of a multistage pump, which comprises a pump shaft, an impeller and a spring gasket, wherein the impeller is arranged on the pump shaft through a shaft sleeve and a flat key, the top end of the shaft sleeve is provided with the spring gasket sleeved on the pump shaft, the device comprises an upper top plate, a lower pressing plate and a supporting bolt, the upper top plate and the lower pressing plate are in a circular ring shape, the inner diameters of the upper top plate and the lower pressing plate are equal to the diameter of the pump shaft, the upper top plate and the lower pressing plate are coaxially and parallelly arranged outside the pump shaft, two groups of concave key grooves which are symmetrically distributed left and right are formed in the inner sides of the upper top plate and the lower pressing plate, and each group of concave key grooves comprises two concave key grooves which are symmetrically distributed up and down; the upper top plate is fixedly connected with the lower pressing plate through a supporting bolt and a limiting nut.
Further, four bolt through holes are uniformly formed in the upper top plate and the lower pressing plate along the circumference, and every two adjacent bolt through holes are arranged at 90 degrees.
Further, the supporting bolts are full-thread stud bolts, and the supporting bolts sequentially penetrate through bolt through holes of the upper top plate and the lower pressing plate from top to bottom and are distributed on the upper top plate and the lower pressing plate in a bilateral symmetry mode.
Further, the limit nut comprises an upper top plate limit nut, the upper top plate limit nut is connected with the upper end of the supporting bolt through threads, and the upper top plate limit nut is symmetrically distributed on the upper top plate left and right and up and down and is used for adjusting and limiting the position of the upper top plate.
Further, the limit nut further comprises a lower pressure plate limit nut, the lower pressure plate limit nut is connected with the lower end of the supporting bolt through threads, and the lower pressure plate limit nut is symmetrically distributed on the lower pressure plate in a left-right and up-down mode and is used for adjusting and limiting the position of the lower pressure plate.
Further, the upper flat key is embedded in the concave key groove of the upper top plate, and the lower flat key is embedded in the concave key groove of the lower pressing plate.
Further, for the last stage impeller, a lock nut is mounted on the pump shaft.
Compared with the prior art, the utility model has the following advantages:
1. the dismounting device has the advantages of simple structure, convenient operation, low production cost and the like, can quickly and effectively realize the dismounting of the flat keys of the multistage pump during the maintenance of the multistage pump, is convenient for maintenance personnel to operate, improves the dismounting efficiency of the multistage pump, realizes nondestructive dismounting and avoids larger economic loss caused by damaging parts.
2. The upper top plate, the lower pressing plate and the supporting bolt are all detachable and replaceable, and can be replaced according to multistage pumps with different sizes and lengths to manufacture different upper top plates, lower pressing plates and supporting bolts, so that the flat key disassembly and assembly of the multistage pumps with different types are realized, and the application range is wide.
3. When the multistage pump is assembled back, the spring gaskets of each stage of impeller can be effectively compressed, the phenomenon that the spring gaskets interfere with the impeller key grooves due to large elongation caused by the fact that the spring gaskets of each stage are not effectively compressed is avoided, and the flat key installation process is simple and quick.
Drawings
Fig. 1 is a schematic structural diagram of a flat key dismounting device for a multistage pump according to a first embodiment of the present utility model;
fig. 2 is a front view of a flat key dismounting device of a multistage pump according to a first embodiment of the present utility model;
fig. 3 is a plan view of a flat key dismounting device for a multistage pump according to a first embodiment of the present utility model;
FIG. 4 is a front view of a flat key assembly and disassembly device for a multistage pump according to a first embodiment of the present utility model;
FIG. 5 is an isometric view of a multi-stage pump flat key assembly and disassembly device according to a first embodiment of the present utility model;
FIG. 6 is a front view of a flat key assembly and disassembly device for a multistage pump according to a second embodiment of the present utility model;
fig. 7 is an isometric view of a multistage pump flat key assembly and disassembly device according to a second embodiment of the present utility model.
The meaning represented by the numbers in the figures is:
1. the pump comprises a pump shaft, an impeller, a spring gasket, an upper top plate, a lower pressing plate, a supporting bolt, a concave key groove, a bolt through hole, an upper top plate limit nut, a lower pressing plate limit nut, a locking nut, a shaft sleeve, a lower flat key and an upper flat key, wherein the upper top plate is provided with the upper top plate limit nut, the lower pressing plate limit nut is provided with the lower pressing plate limit nut, the locking nut is provided with the lower pressing plate limit nut, the upper pressing plate limit nut is provided with the upper pressing plate limit nut, the lower pressing plate limit nut is provided with the upper pressing plate limit nut, the upper pressing plate is provided with the.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments.
As shown in fig. 1 to 3, the present embodiment provides a flat key dismounting device for a multistage pump, the multistage pump includes a pump shaft 1, an impeller 2 and a spring washer 3, the impeller 2 is arranged on the pump shaft 1 through a shaft sleeve 12 and a flat key, and the top end of the shaft sleeve 12 is provided with the spring washer 3 sleeved on the pump shaft 1. The device comprises an upper top plate 4, a lower pressing plate 5 and a supporting bolt 6, wherein the upper top plate 4 and the lower pressing plate 5 are annular, the inner diameters of the upper top plate 4 and the lower pressing plate 5 are equal to the diameter of the pump shaft 1, the upper top plate 4 and the lower pressing plate 5 are coaxially and parallelly arranged outside the pump shaft 1, and the upper top plate 4 and the lower pressing plate 5 can respectively coaxially rotate; two groups of concave key grooves 7 which are distributed in a bilateral symmetry mode are formed in the inner sides of the upper top plate 4 and the lower pressing plate 5, each group of concave key grooves 7 comprises two concave key grooves 7 which are distributed in a vertical symmetry mode, however, the upper concave key groove 7 and the lower concave key groove 7 do not penetrate, an upper flat key 14 is embedded in the concave key groove 7 of the upper top plate 4, and a lower flat key 13 is embedded in the concave key groove 7 of the lower pressing plate 5. The upper top plate 4 is fixedly connected with the lower pressing plate 5 through a supporting bolt 6 and a limiting nut.
Specifically, four bolt through holes 8 are uniformly formed in the upper top plate 4 and the lower pressing plate 5 along the circumference, and every two adjacent bolt through holes 8 are arranged at 90 degrees. The supporting bolts 6 are full-thread stud bolts, the supporting bolts 6 sequentially penetrate through bolt through holes 8 of the upper top plate 4 and the lower pressing plate 5 from top to bottom, and the supporting bolts 6 are two in number and are distributed on the upper top plate 4 and the lower pressing plate 5 in bilateral symmetry.
The limiting nuts comprise an upper top plate limiting nut 9 and a lower pressure plate limiting nut 10, the upper top plate limiting nut 9 is connected with the upper end of the supporting bolt 6 through threads, and the upper top plate limiting nuts 9 are symmetrically distributed on the upper top plate 4 left and right and up and down and are used for adjusting and limiting the position of the upper top plate 4; the lower pressure plate limiting nuts 10 are in threaded connection with the lower ends of the supporting bolts 6, and the lower pressure plate limiting nuts 10 are symmetrically distributed on the lower pressure plate 5 in a left-right and up-down mode and used for adjusting and limiting the position of the lower pressure plate 5.
The working principle is as follows:
as shown in fig. 4 and 5, when in use, parts such as the lower impeller 2, the shaft sleeve 12, the spring washer 3 and the like are firstly assembled back, then the lower pressing plate 5 and the upper pressing plate 4 are sleeved on the pump shaft 1 in sequence, the lower pressing plate 5 is rotated to enable the concave key groove 7 on the inner side of the lower pressing plate 5 to correspond to the key groove hole of the flat key 13 on the lower side of the pump shaft 1, the upper pressing plate 4 is rotated to enable the concave key groove 7 on the inner side of the upper pressing plate 4 to correspond to the key groove hole of the flat key 14 on the upper side of the pump shaft 1, the upper pressing plate 4 and the lower pressing plate 5 are sequentially penetrated through bilateral symmetry by using two supporting bolts 6, the upper pressing plate limiting nuts 9 are installed on the supporting bolts 6 from the upper side and the lower side of the lower pressing plate 5, and the lower pressing plate limiting nuts 10 are installed on the supporting bolts 6.
Two upper top plate limit nuts 9 on the upper side of the upper top plate 4 are adjusted to limit the top, two upper side flat keys 14 are symmetrically arranged in key slot holes of the upper side flat keys 14 of the pump shaft 1, the upper top plate 4 is adjusted to be in an up-down position, the upper side flat keys 14 are embedded into concave key slots 7 of the upper top plate 4 to limit the upper top plate 4, and the two upper top plate limit nuts 9 on the lower side of the upper top plate 4 are fastened simultaneously, so that the level and uniform stress of the upper top plate 4 are ensured.
The two lower platen limit nuts 10 at the lower side of the lower platen 5 are adjusted to limit the bottoms, the two lower platen limit nuts 13 are symmetrically arranged in key slots of the lower side flat keys 13 of the pump shaft 1, because the height of the spring gasket 3 interferes with key slot holes of the lower side flat keys 13 of the pump shaft 1, the lower side flat keys 13 cannot be completely embedded in the key slot holes of the lower side flat keys 13 of the pump shaft 1, the bottoms of the lower side flat keys 13 are propped against the spring gasket 3, the upper and lower positions of the lower platen 5 are adjusted to enable the lower side flat keys 13 to be embedded in the concave key slots 7 of the lower platen 5 to locate the lower platen 5, the two lower platen limit nuts 10 at the upper side of the lower platen 5 are fastened at the same time, the spring gasket 3 is compressed along the key slot hole direction after the lower side flat keys 13 are stressed, the spring gasket 3 cannot interfere with the key slot holes of the lower side flat keys 13 of the pump shaft 1 after being effectively compressed, the key slots of the lower side flat keys 13 of the pump shaft 1 are completely exposed, and then the lower side flat keys 13 are gently knocked into the key slots of the lower side flat keys 13 of the pump shaft 1 by using a wrench, and the lower side flat keys 13 can be installed. When the lower flat key 13 is removed, the method is also carried out, so that the single-side stress of the lower flat key 13 is reduced, the lower flat key 13 is conveniently taken out, and the phenomenon that the compression force of each stage of impeller 2 and parts of the pump body is large due to the compression of the spring gasket 3 is avoided, so that the phenomenon that the flat key is difficult to take out is avoided; the flat key is replaced in the taking-out mode, the modes of knocking, chiseling and the like are not adopted any more, and damage to the flat key and the pump shaft 1 is avoided.
In this embodiment, different upper top plates 4, lower pressing plates 5 and supporting bolts 6 can be manufactured according to multi-stage pumps with different sizes and lengths.
In the maintenance of the multistage pump, the spring gaskets 3 of the impellers 2 of each stage are effectively compressed by using the upper top plate 4, the lower pressure plate 5, the supporting bolts 6 and the limit nuts, so that the quick assembly and disassembly of the flat keys of the multistage pump are realized; the installation mode that the impeller 2, the shaft sleeve 12 and the like are pressed down to easily generate larger stress on parts in the pump is not adopted any more, so that the damage of the parts of the multistage pump made of special materials, such as parts with expensive equivalent grids made of aluminum alloy and copper alloy, is avoided, and the economic loss is effectively avoided.
Example two
The scheme of this embodiment is basically the same as that of the first embodiment, and the details are not repeated, except that, as shown in fig. 6 and 7, when the upper side of the impeller 2 of the last stage is not positioned by the upper side flat key 14, the upper top plate 4 cannot be positioned and stressed, at this time, the lock nut 11 is installed on the pump shaft 1, and the lock nut 11 is positioned and stressed as the upper side flat key 14, thereby realizing the flat key installation of the last stage.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The use of the terms "a" or "an" and the like in the description and in the claims does not necessarily imply a limitation on the amount. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (7)
1. The utility model provides a multistage pump flat key dismouting device, multistage pump includes pump shaft, impeller and spring washer, the impeller passes through axle sleeve, flat key setting on the pump shaft, the top of axle sleeve is provided with the spring washer of suit on the pump shaft, its characterized in that, this device includes roof, holding down plate and supporting bolt, roof and holding down plate are the ring shape, the internal diameter of roof and holding down plate equals with the diameter of pump shaft, roof and holding down plate coaxial parallel arrangement is outside the pump shaft, two sets of concave type keyway that are bilateral symmetry and distribute are seted up to the inboard of roof and holding down plate, and every set of concave type keyway is including two concave type keyways that are upper and lower symmetry and distribute; the upper top plate is fixedly connected with the lower pressing plate through a supporting bolt and a limiting nut.
2. The flat key dismounting device of the multistage pump according to claim 1, wherein four bolt through holes are uniformly formed in the upper top plate and the lower pressing plate along the circumference, and every two adjacent bolt through holes are arranged at 90 degrees.
3. The flat key dismounting device of the multistage pump according to claim 2, wherein the supporting bolts are full-thread stud bolts, and the supporting bolts sequentially pass through bolt through holes of the upper top plate and the lower pressing plate from top to bottom and are distributed on the upper top plate and the lower pressing plate in a bilateral symmetry manner.
4. The flat key dismounting device of the multistage pump according to claim 3, wherein the limit nut comprises an upper top plate limit nut, the upper top plate limit nut is connected with the upper end of the supporting bolt through threads, and the upper top plate limit nut is symmetrically distributed on the upper top plate in a left-right and up-down manner and is used for adjusting and limiting the position of the upper top plate.
5. The flat key dismounting device of the multistage pump according to claim 3 or 4, wherein the limit nut further comprises a lower pressure plate limit nut, the lower pressure plate limit nut is connected with the lower end of the supporting bolt through threads, and the lower pressure plate limit nut is symmetrically distributed on the lower pressure plate in a left-right and up-down mode and is used for adjusting and limiting the position of the lower pressure plate.
6. The multistage pump flat key assembling and disassembling device according to claim 1, wherein the concave key groove of the upper top plate is internally embedded with an upper flat key, and the concave key groove of the lower pressing plate is internally embedded with a lower flat key.
7. The flat key disassembly and assembly apparatus of a multistage pump according to claim 1, wherein a lock nut is mounted on the pump shaft for the last stage impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223510242.4U CN219426676U (en) | 2022-12-28 | 2022-12-28 | Multistage pump flat key dismouting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223510242.4U CN219426676U (en) | 2022-12-28 | 2022-12-28 | Multistage pump flat key dismouting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219426676U true CN219426676U (en) | 2023-07-28 |
Family
ID=87343471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223510242.4U Active CN219426676U (en) | 2022-12-28 | 2022-12-28 | Multistage pump flat key dismouting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219426676U (en) |
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2022
- 2022-12-28 CN CN202223510242.4U patent/CN219426676U/en active Active
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