CN212748273U - Tool for impeller overspeed test - Google Patents
Tool for impeller overspeed test Download PDFInfo
- Publication number
- CN212748273U CN212748273U CN202021240866.7U CN202021240866U CN212748273U CN 212748273 U CN212748273 U CN 212748273U CN 202021240866 U CN202021240866 U CN 202021240866U CN 212748273 U CN212748273 U CN 212748273U
- Authority
- CN
- China
- Prior art keywords
- impeller
- overspeed
- mandrel
- positioning
- bolt
- 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
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a tool for impeller overspeed test, which comprises an impeller bolt, a locking nut, a positioning pin and an overspeed mandrel, wherein one end of the overspeed mandrel is provided with a positioning hole, both ends of the impeller bolt are provided with external threads, one end of the impeller bolt is arranged in the positioning hole of the overspeed mandrel in a threaded connection mode, and the other end of the impeller bolt is connected with the locking nut in a threaded connection mode; the positioning pin is arranged in the positioning hole and used for circumferentially positioning the impeller and the overspeed mandrel; when an overspeed test is carried out, the impeller is sleeved on the impeller bolt, and the boss on the lower end surface of the impeller is extended into the positioning hole of the overspeed mandrel; the positioning hole is matched with the locking nut to axially position the impeller. The tool has the advantages of simple and fine structure, long service life, stable fixing mode, accurate positioning, convenience in assembly and disassembly, difficulty in abrasion of the impeller and the overspeed mandrel, and safety and reliability.
Description
Technical Field
The utility model relates to a machinery frock clamp field, specifically say, relate to a frock for impeller overspeed test.
Background
The impeller, which is the most important aerodynamic component of a centrifugal compressor, is usually composed of a hub and blades. Considering the ultrahigh rotating speed of the impeller during working, the impeller needs to be subjected to an overspeed test, and the overspeed test is a scientific load which uses a strong centrifugal force generated by high-speed rotation to preload a high-speed rotating workpiece at a test rotating speed one time or 1.25 times of the working rotating speed of an overspeed test piece so as to check whether the workpiece is safe and reliable. Therefore, when the impeller is subjected to overspeed test, a corresponding tool is required.
Most of existing impeller overspeed test tools are clamped by tool fixtures, and have the defects of insecure fixation, inaccurate positioning, low coaxiality, overlarge impeller excircle runout, unbalanced quantity superposition, troublesome assembly and disassembly and the like, which can cause overlarge overspeed test vibration and failure.
Therefore, there is a need for an improved and optimized impeller overspeed test tool.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design reasonable, simple, can guarantee its installation axiality and hang down straightness precision high, can reduce the work piece beat to the frock that is used for the impeller over-speed test of the influence of unbalance amount, this frock can not lead to vibrating too greatly because of the disequilibrium and make experimental failure.
The utility model provides a technical scheme that above-mentioned problem adopted is: the utility model provides a frock for impeller overspeed test, the lower terminal surface of impeller has a boss, its characterized in that: the test tool comprises an impeller bolt, a locking nut, a positioning pin and an overspeed mandrel, wherein one end of the overspeed mandrel is provided with a positioning hole, external threads are arranged at two ends of the impeller bolt, one end of the impeller bolt is installed in the positioning hole of the overspeed mandrel in a threaded connection mode, and the other end of the impeller bolt is connected with the locking nut in a threaded connection mode; the positioning pin is arranged in the positioning hole and used for circumferentially positioning the impeller and the overspeed mandrel; when an overspeed test is carried out, the impeller is sleeved on the impeller bolt, and the boss on the lower end face of the impeller extends into the positioning hole of the overspeed mandrel; the positioning hole is matched with the locking nut to axially position the impeller.
Preferably, the positioning hole is a stepped blind hole with a large-aperture section at the upper part and a small-aperture section at the lower part, wherein the small-aperture section is provided with internal threads, and the size of the large-aperture section is matched with the size of a boss on the lower end face of the impeller.
Preferably, an axial positioning pin mounting hole is formed in a step surface at the transition joint of the large-aperture section and the small-aperture section, a spigot is formed in the bottom surface of the boss on the lower end face of the impeller, and the positioning pin is inserted into the positioning pin mounting hole through one end and inserted into the spigot through the other end to complete circumferential positioning of the impeller and the overspeed mandrel; the positioning function of the positioning pin in the tool can not cause the matching part of the impeller and the overspeed mandrel to be seriously abraded, and the impeller can not cause the failure of the overspeed test due to the increase of unbalance caused by overlarge offset when rotating at high speed.
Preferably, the height of the large-aperture section is slightly higher than that of a boss on the lower end face of the impeller, so that the boss extends into the positioning hole to ensure that the lower end face of the impeller is attached to the end face of the overspeed mandrel.
Preferably, the other end of the overspeed mandrel is provided with a limiting boss and a plurality of bolt holes, wherein the limiting boss is used for positioning when the overspeed mandrel is connected to the impeller overspeed testing machine.
Preferably, the impeller bolt is divided into three sections: the interlude with connect the tip section at interlude both ends, tip section all are provided with fine tooth external screw thread, and the diameter of tip section is greater than the diameter of interlude. The clearance of impeller bolt interlude rather than adopting the diameter design the same with the tip section for simple to operate, and get rid of the deviation of machining precision deviation to the impeller location. In addition, the fine thread connection can better position and prevent looseness caused by vibration.
Compared with the prior art, the utility model, have following advantage and effect:
1. the tool has the advantages of simple and fine structure, long service life, stable fixing mode, accurate positioning, convenient assembly and disassembly, difficult abrasion of the impeller and the overspeed mandrel, and safe and reliable effect;
2. the tool can meet the higher requirement of an overspeed test on the unbalance of the rotor, and can ensure the smooth running of the overspeed test on the bidirectional positioning of the impeller workpiece and the installation mode of the tool;
3. the impeller is in interference fit with the overspeed mandrel and in clearance fit with the impeller bolt, so that the head and the tail of the impeller are positioned, and the impeller bolt is in threaded connection with the overspeed mandrel, so that the coaxiality of the impeller bolt, the overspeed mandrel and the impeller bolt can meet higher requirements, and the connection is reliable;
4. the locking nut can lock the impeller and the tool through threads to ensure the parallelism and the verticality of the end surfaces of the impeller and the tool, and the locking nut is in clearance fit with the impeller screw rod, so that the verticality of the impeller screw rod to the overspeed mandrel can be corrected;
5. the tools are all designed as cylinders, so that the dynamic balance correction of the tools is more convenient, and the overspeed test can be more conveniently implemented;
6. the tool is simple in structure, safe and convenient to assemble and disassemble, and cannot lead to the fact that the impeller workpiece reaches the tool is abraded and even collided when the impeller workpiece is disassembled.
Drawings
In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a tool according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of an overspeed mandrel in an embodiment of the present invention.
Description of reference numerals: impeller bolt 1, lock nut 2, impeller 3, locating pin 4, hypervelocity dabber 5, locating hole 51, spacing boss 52, bolt hole 53.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
See fig. 1-2.
The embodiment of the invention discloses a tool for an impeller overspeed test, which comprises an impeller bolt 1, a locking nut 2, a positioning pin 4 and an overspeed mandrel 5.
In this embodiment, impeller 3's lower terminal surface has a boss, locating hole 51 has been seted up to overspeed dabber 5's one end, locating hole 51 is that upper portion is big aperture section, the lower part is the ladder blind hole of small aperture section, wherein small aperture section has the internal thread, the boss size cooperation of terminal surface under the size of big aperture section and impeller 3, when specifically designing, with the height of the boss of terminal surface under the high a little higher than impeller 3 of big aperture section, make the boss stretch into and ensure the terminal surface laminating of terminal surface under impeller 3 and overspeed dabber 5 behind locating hole 51. The other end of the over speed spindle 5 is provided with a limit boss 52 for positioning when the over speed spindle 5 is connected to the impeller over speed tester and four bolt holes 53.
In this embodiment, external threads are provided at both ends of the impeller bolt 1, one end of the impeller bolt 1 is installed in the positioning hole 51 of the overspeed mandrel 5 by means of threaded connection, and the other end of the impeller bolt 1 is connected to the lock nut 2 by means of threaded connection. Specifically, the impeller bolt 1 is divided into three sections: the interlude with connect the tip section at the interlude both ends, the tip section all is provided with fine tooth external screw thread, the diameter of tip section is greater than the diameter of interlude. The clearance of impeller bolt interlude rather than adopting the diameter design the same with the tip section for simple to operate, and get rid of the deviation of machining precision deviation to the impeller location. In addition, the fine thread connection can better position and prevent looseness caused by vibration.
In this embodiment, the positioning pin 4 is installed in the positioning hole 51, and is used for circumferentially positioning the impeller 3 and the overspeed mandrel 5; when an overspeed test is carried out, the impeller 3 is sleeved on the impeller bolt 1, and a boss on the lower end face of the impeller extends into a positioning hole 51 of the overspeed mandrel 5; the positioning hole 51 is matched with the locking nut 2 to axially position the impeller 3. Specifically, an axial positioning pin mounting hole is formed in a step surface at the transition joint of the large-aperture section and the small-aperture section of the positioning hole 51, a spigot is formed in the bottom surface of a boss on the lower end face of the impeller 3, and the positioning pin 4 is inserted into the positioning pin mounting hole through one end and inserted into the spigot through the other end to complete circumferential positioning of the impeller 3 and the overspeed mandrel 5; the positioning function of the positioning pin 4 in the tool can not cause the matching part of the impeller 3 and the overspeed mandrel 5 to be seriously worn, and the impeller 3 can not cause the overspeed test failure due to the unbalance increase caused by overlarge offset when rotating at high speed.
When the tool is used, firstly, the surface precision between the contact surfaces of the tool is determined, no collision burr exists, the length of the positioning pin 4 is determined to be not more than the sum of the depth of the positioning pin mounting hole and the seam allowance height of the impeller 3, then the positioning pin 4 is mounted in the positioning pin mounting hole, one end of the impeller bolt 1 is mounted in the positioning hole 51 of the overspeed mandrel 5, two nuts can be used for screwing until the positioning pin is not loosened, then the impeller 3 is sleeved on the impeller bolt 1, the seam allowance direction of the impeller 3 is aligned with the direction of the positioning pin 4, the boss at the lower end of the impeller 3 is mounted in the positioning hole 51 of the overspeed mandrel 5, the end surface of the impeller 3 is tightly attached to the mounting surface at the top end of the overspeed tool 5, the matching between the position of the top end hole of the impeller 3 and the large diameter position of the upper end of the impeller.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the patent idea of the utility model are included in the protection scope of the patent of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (4)
1. The utility model provides a frock for impeller overspeed test, the lower terminal surface of impeller (3) has a boss, its characterized in that: the test tool comprises an impeller bolt (1), a locking nut (2), a positioning pin (4) and an overspeed mandrel (5), wherein one end of the overspeed mandrel (5) is provided with a positioning hole (51), external threads are arranged at two ends of the impeller bolt (1), one end of the impeller bolt (1) is installed in the positioning hole (51) of the overspeed mandrel (5) in a threaded connection mode, and the other end of the impeller bolt (1) is connected with the locking nut (2) in a threaded connection mode; the positioning pin (4) is arranged in the positioning hole (51) and used for circumferentially positioning the impeller (3) and the overspeed mandrel (5); when an overspeed test is carried out, the impeller (3) is sleeved on the impeller bolt (1), and a boss on the lower end face of the impeller extends into a positioning hole (51) of the overspeed mandrel (5); the positioning hole (51) is matched with the locking nut (2) to axially position the impeller (3); the positioning hole (51) is a stepped blind hole with a large-aperture section at the upper part and a small-aperture section at the lower part, wherein the small-aperture section is provided with internal threads, and the size of the large-aperture section is matched with that of a boss on the lower end face of the impeller (3); the impeller is characterized in that an axial positioning pin mounting hole is formed in the step face of the transition joint of the large-aperture section and the small-aperture section, a spigot is formed in the bottom face of a boss of the lower end face of the impeller (3), the positioning pin (4) is inserted into the positioning pin mounting hole through one end, and the other end of the positioning pin is inserted into the spigot to complete circumferential positioning of the impeller (3) and the overspeed mandrel (5).
2. The tool for the impeller overspeed test according to claim 1, characterized in that: the height of the large-aperture section is slightly higher than that of a boss on the lower end face of the impeller (3), so that the boss extends into the positioning hole (51) to ensure that the lower end face of the impeller (3) is attached to the end face of the overspeed mandrel (5).
3. The tool for the impeller overspeed test according to claim 1, characterized in that: the other end of the overspeed mandrel (5) is provided with a limiting boss (52) and a plurality of bolt holes (53) for positioning when the overspeed mandrel (5) is connected to an impeller overspeed testing machine.
4. The tool for the impeller overspeed test according to claim 1, characterized in that: the impeller bolt (1) is divided into three sections: the interlude with connect the tip section at interlude both ends, tip section all are provided with fine tooth external screw thread, and the diameter of tip section is greater than the diameter of interlude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021240866.7U CN212748273U (en) | 2020-06-30 | 2020-06-30 | Tool for impeller overspeed test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021240866.7U CN212748273U (en) | 2020-06-30 | 2020-06-30 | Tool for impeller overspeed test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212748273U true CN212748273U (en) | 2021-03-19 |
Family
ID=75011726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021240866.7U Active CN212748273U (en) | 2020-06-30 | 2020-06-30 | Tool for impeller overspeed test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212748273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280000A (en) * | 2021-06-22 | 2021-08-20 | 中国科学院工程热物理研究所 | End face tooth connecting structure with positioning function between impeller and main shaft |
-
2020
- 2020-06-30 CN CN202021240866.7U patent/CN212748273U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113280000A (en) * | 2021-06-22 | 2021-08-20 | 中国科学院工程热物理研究所 | End face tooth connecting structure with positioning function between impeller and main shaft |
| CN113280000B (en) * | 2021-06-22 | 2022-09-16 | 中国科学院工程热物理研究所 | End face tooth connecting structure with positioning function between impeller and main shaft |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212748273U (en) | Tool for impeller overspeed test | |
| CN100577350C (en) | Anti-loose mechanism for locking knife tool used in cutting machine | |
| CN101396745B (en) | Yarn-spinning spindle supporting hole processing method and special clamp thereof | |
| CN208099846U (en) | A kind of processing unit (plant) of tilting pad eccentric inner hole | |
| CN113530878A (en) | Main shaft connecting structure of turbocharger | |
| CN218624735U (en) | Compressor rotor structure | |
| US20220034292A1 (en) | Rotor for a wind turbine, and method | |
| SE524112C2 (en) | Device for pivotal suspension of a vehicle wheel | |
| CN105092125A (en) | Torque sensor mounting structure | |
| CN209959682U (en) | Anti-loosening shaft sleeve nut | |
| CN212822836U (en) | Eccentric boring fixture for crankshaft of single-cylinder engine | |
| CN111975287B (en) | Mounting process for hub cap of impeller of nuclear main pump | |
| CN112012966B (en) | Balancing assembly, rotor system, gas turbine and balancing method | |
| AU2017100872A4 (en) | Easily-operated shaft extension length detection device | |
| CN211505661U (en) | Supporting and fixing device for split exciter rotor of generator | |
| CN219337380U (en) | Grinding wheel positioning fixture with shock attenuation decreases and decreases structure | |
| CN110043551B (en) | Anti-loose shaft sleeve nut | |
| CN111604734A (en) | Aeroengine compressor rotor grinding apex location aligning device | |
| CN205927204U (en) | Dysmorphism pinhole precision finishing boring bar | |
| CN210996554U (en) | Centrifugal compressor air inlet chamber ring groove machining tool and device thereof | |
| CN210188720U (en) | High-efficient combination formula chamfer cutter | |
| US10415629B2 (en) | Crankshaft for a reciprocating piston engine | |
| CN117906924A (en) | Combined shafting tool for disc part rotation test | |
| CN214768674U (en) | Punch convenient to install | |
| CN220454698U (en) | Device for detecting vibration of main shaft of machining center |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |