CN219840850U - Anti-loosening structure for impeller nut - Google Patents
Anti-loosening structure for impeller nut Download PDFInfo
- Publication number
- CN219840850U CN219840850U CN202320662894.5U CN202320662894U CN219840850U CN 219840850 U CN219840850 U CN 219840850U CN 202320662894 U CN202320662894 U CN 202320662894U CN 219840850 U CN219840850 U CN 219840850U
- Authority
- CN
- China
- Prior art keywords
- nut
- screw
- impeller
- hole
- radius
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Abstract
The utility model discloses an impeller nut anti-loosening structure which comprises a pump shaft and an impeller sleeved on the pump shaft, wherein the pump shaft comprises a shaft body and a tip arranged at one end of the shaft body; the end is connected with a nut, a steel wire thread sleeve is preset in a screw hole of the nut, an external thread matched with the steel wire thread sleeve is arranged on the end, the nut and the end are connected through threads, and in a nut screwing state, the nut is abutted against the impeller; the end deviates from the one end of axis body is equipped with the screw hole, the screw hole is connected with the screw, under the screw tightening state, the screw head of screw with the nut offsets. The impeller nut anti-loosening structure adopts a steel wire threaded sleeve design, is simple and reliable in anti-loosening, can be disassembled for many times without damaging screw teeth, and simultaneously adopts screws to axially fix the nut and the pump shaft, so that the looseness of the nut is further avoided; the two anti-loosening measures are combined, so that the anti-loosening effect is better.
Description
Technical Field
The utility model relates to the technical field of power pumps, in particular to an impeller nut anti-loosening structure.
Background
In the application process of the centrifugal pump, the impeller can be reversed due to the rotation drop or the liquid level drop when the pump is stopped; the pump can also cause impeller reversal during commissioning because the motor connections are reversed. The impeller is reversed to cause the loosening of the impeller nut, so that the impeller moves forwards to rub the pump body due to the loosening of the positioning nut, and the problems of impeller damage, shell friction, mechanical seal damage, pump shaft breakage and the like are caused.
At present, the measure of preventing the impeller screw cap from reversing loose in the industry generally adopts a double screw cap fixing mode under the condition of no sealing requirement, and the mode requires that the length of the pump shaft screw thread is twice longer than that of a single screw cap mode, thereby leading to the rise of corresponding costs of pump shaft raw materials, processing man-hour, screw cap number and the like. In addition, the principle is that the screw cap is tensioned by the pretightening force among the screw teeth, and the screw cap is loosened under extreme conditions such as axial impact vibration, so that the impeller is loosened and slipped, and even the impeller and the pump shaft are scrapped. Therefore, it is needed to design an impeller nut structure with a stronger anti-loosening capability.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides an impeller nut anti-loosening structure, which adopts two anti-loosening measures of axially fixing a nut and a pump shaft by adopting a screw and arranging a steel wire thread sleeve between the nut and the end socket, so that the anti-loosening effect is better, and the service life of the pump is prolonged.
In order to achieve the above purpose, the utility model adopts the following technical scheme: an impeller nut anti-loosening structure comprises a pump shaft and an impeller sleeved on the pump shaft, wherein the pump shaft comprises a shaft body and an end head arranged at one end of the shaft body;
the end is connected with a nut, a steel wire thread sleeve is preset in a screw hole of the nut, an external thread matched with the steel wire thread sleeve is arranged on the end, the nut and the end are connected through threads, and in a nut screwing state, the nut is abutted against the impeller;
the end deviates from the one end of axis body is equipped with the screw hole, the screw hole is connected with the screw, under the screw tightening state, the screw head of screw with the nut offsets.
Further, the radius of the end head is smaller than that of the shaft body, and the length of the end head is smaller than or equal to that of the internal thread part of the nut.
Further, the nut includes butt portion and screw thread portion, the screw thread portion inboard is equipped with the internal thread, the nut with after the end is connected, butt portion covers the end, butt portion with the screw hole department of opposition is equipped with step-like through-hole, step-like through-hole includes from outside-in first hole and second hole, the radius of first hole equals the radius of screw nut, the radius of second hole equals the radius of screw rod.
Furthermore, sealing sleeves are respectively arranged between the screw head of the screw and the nut, between the nut and the impeller, and between the impeller and the shaft body.
Further, at least one connecting key is arranged on one side, close to the shaft body, of the impeller, a connecting groove matched with the connecting key is formed in the shaft body, and the connecting key is inserted into the connecting groove to limit the impeller to rotate relative to the pump shaft.
By the technical scheme, the utility model has the following beneficial effects:
1. according to the utility model, the steel wire thread sleeve is arranged between the nut internal thread and the end external thread, so that the bearing capacity and fatigue resistance of threaded connection are enhanced;
2. according to the utility model, the screw is arranged at the end head to axially fix the nut and the pump shaft, so that the anti-loosening capability is enhanced.
The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an overall schematic view of a blade wheel nut anti-loosening structure in accordance with an embodiment of the present utility model;
FIG. 2 is an enlarged view at A in FIG. 1;
fig. 3 is an enlarged view at B in fig. 2.
Reference numerals of the above drawings: 1. a pump shaft; 11. a shaft body; 12. an end head; 123. an external thread; 2. an impeller; 21. a connecting key; 3. a screw cap; 31. an abutting portion; 32. a threaded portion; 33. a first hole; 34. a second hole; 35. an internal thread; 4. a steel wire thread sleeve; 5. a screw; 51. a screw head; 52. and (3) a screw.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that, in the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
Examples: as shown in connection with FIGS. 1-3, in this embodiment, disclosed
The utility model provides an impeller nut locking structure, includes pump shaft 1, cup joint in impeller 2 on pump shaft 1, pump shaft 1 includes axis body 11 and locates end 12 of axis body one end.
In this embodiment, two symmetrical connection keys 21 are provided on the impeller 2, and a connection groove matched with the connection key 21 is provided on the shaft body 11, and the connection key 21 is inserted into the connection groove to limit the rotation of the impeller 2 relative to the pump shaft 1.
In another possible embodiment, the impeller 2 and the pump shaft 1 are also connected by threads, and the rotation and loose preventing capability of the technical scheme is stronger, but the processing technology is more troublesome.
The end 12 is connected with a nut 3, a steel wire thread sleeve 4 is preset in a screw hole of the nut 3, an external thread 123 matched with the steel wire thread sleeve 4 is arranged on the end 12, the nut 3 and the end 12 are connected through threads, and the nut 3 and the impeller 2 are propped against each other in a screwing state of the nut 3. The technical scheme increases the bearing capacity and fatigue strength of the threaded connection and ensures that the threaded structure has the advantages of wear resistance, heat resistance, corrosion resistance and the like by arranging the steel wire thread sleeve 4 between the nut 3 and the end head 12.
In this embodiment, the radius of the end 12 is smaller than the radius of the shaft 11, and the length of the end 12 is smaller than or equal to the length of the internal thread of the nut 3.
Through above-mentioned technical scheme for the internal thread 35 portion of nut 3 and the axle sleeve of impeller 2 are not on same axis, have promoted locking ability.
A threaded hole is formed in one end, away from the shaft body 11, of the end head 12, a screw 5 is connected to the threaded hole, and the length of a screw rod 52 of the screw 5 is slightly smaller than that of the threaded hole; in the tightened state of the screw 5, the screw head 51 of the screw 5 abuts against the nut 3. The screw cap 3 and the pump shaft 1 are axially fixed through the screw 5, so that the anti-loosening capability is greatly enhanced.
As shown in fig. 2, the nut 3 includes an abutment portion 31 and a threaded portion 32, the internal thread 35 is provided on the inner side of the threaded portion 32, after the nut 3 is connected with the head 12, the abutment portion 31 covers the head 12, a stepped through hole is provided at a position opposite to the threaded hole and the abutment portion 31, the stepped through hole includes a first hole 33 and a second hole 34 from the outside to the inside, a radius of the first hole 33 is equal to a radius of the screw head 51, and a radius of the second hole 34 is equal to a radius of the screw 52. When in installation, the screw 5 sequentially passes through the first hole 33 and the second hole 34 and then is connected with the threaded hole on the end head 12. Through above-mentioned technical scheme for the volume of screw 5 reduces as far as possible, screw 5 and nut 3 contact more closely, and the connection is more firm.
In order to protect the screw thread in the threaded connection, sealing sleeves are respectively arranged between the nut 51 of the screw 5 and the nut 3, between the nut 3 and the impeller 2 and between the impeller 2 and the shaft body 11, so that fluid contact and corrosion of the screw thread when the pump conveys corrosive media are avoided, and the fastening capability is lost if the screw thread is corroded.
The installation process of this embodiment is as follows:
firstly, a sealing ring is padded at the joint of the end head 12 and the shaft body 11, the impeller 2 is sleeved on the pump shaft 1, the connecting key 21 is inserted into the connecting groove, then the sealing ring is padded at the outer side of the impeller 2, the nut 3 is tightened to prop against the impeller, finally, the sealing ring is padded on the screw head 51 of the screw 5, and the screw 5 is screwed into the threaded hole of the end head 12 to prop against the nut 3 by the screw head 51.
The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present utility model, the present description should not be construed as limiting the present utility model in view of the above.
Claims (5)
1. The impeller nut anti-loosening structure comprises a pump shaft and an impeller sleeved on the pump shaft, and is characterized in that the pump shaft comprises a shaft body and a tip arranged at one end of the shaft body;
the end is connected with a nut, a steel wire thread sleeve is preset in a screw hole of the nut, an external thread matched with the steel wire thread sleeve is arranged on the end, the nut and the end are connected through threads, and in a nut screwing state, the nut is abutted against the impeller;
the end deviates from the one end of axis body is equipped with the screw hole, the screw hole is connected with the screw, under the screw tightening state, the screw head of screw with the nut offsets.
2. The impeller nut lock structure according to claim 1, characterized in that the radius of the tip is smaller than the radius of the shaft body, and the length of the tip is smaller than or equal to the length of the nut internal thread portion.
3. The impeller nut locking structure according to claim 2, characterized in that the nut includes an abutment portion and a threaded portion, an internal thread is provided on the inner side of the threaded portion, the abutment portion covers the tip after the nut and the tip are connected, a stepped through hole is provided at the opposite position of the abutment portion and the threaded hole, the stepped through hole includes a first hole and a second hole from the outside to the inside, the radius of the first hole is equal to the radius of the screw nut, and the radius of the second hole is equal to the radius of the screw rod.
4. The impeller nut locking structure of claim 1, wherein sealing sleeves are respectively arranged between the screw head of the screw and the nut, between the nut and the impeller, and between the impeller and the shaft body.
5. The impeller nut locking structure of claim 1, wherein one side of the impeller, which is close to the shaft body, is provided with at least one connecting key, and the shaft body is provided with a connecting groove matched with the connecting key; and during installation, the connecting key is inserted into the connecting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320662894.5U CN219840850U (en) | 2023-03-30 | 2023-03-30 | Anti-loosening structure for impeller nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320662894.5U CN219840850U (en) | 2023-03-30 | 2023-03-30 | Anti-loosening structure for impeller nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219840850U true CN219840850U (en) | 2023-10-17 |
Family
ID=88303461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320662894.5U Active CN219840850U (en) | 2023-03-30 | 2023-03-30 | Anti-loosening structure for impeller nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219840850U (en) |
-
2023
- 2023-03-30 CN CN202320662894.5U patent/CN219840850U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1854530B (en) | A sealing arrangement for the attachment of a side plate of a centrifugal pump and an attachment screw used therewith | |
| JP2009530169A (en) | Bolt joint | |
| CN219840850U (en) | Anti-loosening structure for impeller nut | |
| US10920830B2 (en) | Mixer comprising a clamping sleeve assembly | |
| KR20090025143A (en) | Device for connecting a cylinder head to a crank housing of a reciprocating piston internal combustion engine | |
| CN211202400U (en) | Anti-loose sealing device for impeller nut | |
| CN216577654U (en) | Bush press-fitting tool | |
| CN109630548A (en) | A kind of copper sheathing structure of block set one | |
| CN219754875U (en) | Structure for preventing impeller nut from loosening during reverse rotation of MMZ chemical pump | |
| CN208503100U (en) | The connection structure of impeller and motor shaft | |
| JP2006226280A (en) | Uniaxial eccentric screw-pump | |
| US20190170184A1 (en) | Connection type between a power source and a progressing cavity pump for submersible application | |
| CN212079226U (en) | Anticorrosion sucker rod | |
| CN211501067U (en) | Anti-loosening impeller structure of cantilever pump | |
| CN215510705U (en) | Conical head anti-loosening structure of hydraulic pipe fitting machining tool | |
| CN218207520U (en) | Prevent stealthily dirty pump bolster bearing housing rotating-structure | |
| CN205605491U (en) | Impeller locking device of lime pump | |
| CN212297009U (en) | Engine cooling water pump assembly | |
| CN205446051U (en) | Horizontal centrifugal pump structure of single -stage | |
| CN217976697U (en) | Thrust bearing assembly for magnetic pump | |
| CN107366637A (en) | A kind of impeller locking device of lime pump | |
| CN218844663U (en) | High-strength water pump capable of preventing impeller from falling off | |
| CN210839217U (en) | Generator with belt wheel connected through threads | |
| CN215172165U (en) | Piston and piston rod matching structure | |
| CN216866599U (en) | Movable joint for butt joint of polished rod and sucker rod |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |