CN115524105A - Automatic centering installation device for large-mass cantilever rotor over-rotation test and working method - Google Patents
Automatic centering installation device for large-mass cantilever rotor over-rotation test and working method Download PDFInfo
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- CN115524105A CN115524105A CN202211059081.3A CN202211059081A CN115524105A CN 115524105 A CN115524105 A CN 115524105A CN 202211059081 A CN202211059081 A CN 202211059081A CN 115524105 A CN115524105 A CN 115524105A
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- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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Abstract
The invention discloses a large-mass cantilever rotor over-rotation test automatic centering mounting device, wherein a guide structure comprises a conical section and a cylindrical section, the cylindrical section is sleeved at the upper end of a rotating shaft, and the upper end of the rotating shaft is inserted into an inner hole of a gear box under the guide effect of the conical section; the rotor is fixed in the pivot lower extreme, and the tray upper surface is arranged in to the rotor, and the tray lower surface passes through ball and liftable mounting platform contact. The invention also discloses a working method of the device, which comprises the steps that the liftable mounting platform rises, the guide structure, the rotating shaft, the rotor and the tray rise integrally, and meanwhile, the tray is adjusted on the liftable mounting platform through the balls to enable the rotating shaft and the inner hole of the gear box to be concentric; the upper end of the rotating shaft is inserted into an inner hole of the gear box under the guiding action of the conical section. The invention can accurately position the concentricity of the rotating shaft and the inner hole of the gear box.
Description
Technical Field
The invention belongs to the technical field of rotor tests, and particularly relates to an automatic centering installation device for a high-mass cantilever rotor over-rotation test and a working method.
Background
The rotor over-rotation test generally uses a vertical over-rotation test bed, the rotor is connected with the test bed through a long and thin rotating shaft, in the test installation process, the rotor is firstly connected with the rotating shaft through a tool to form a rotor-rotating shaft combined piece, the rotating shaft is inserted into an inner hole of a gear box, and a motor drives the gear box, so that the purpose of increasing the speed of the rotor is achieved. To reduce vibration of the rotor system, the rotating shaft must be held concentric with the gearbox bore during installation. For the rotor with smaller mass, a manual installation mode can be adopted, the rotor-rotating shaft combined piece is held by two hands to be installed, the rotating shaft is manually adjusted to be matched with the inner hole of the gear box in place, but for the large-mass rotor (more than or equal to 30 kg) which is difficult to lift by manpower, the operation needs to be carried out by means of a lifting platform. When the rotor-rotating shaft assembly is placed on the lifting installation platform, the concentricity of the rotating shaft and the inner hole cannot be ensured at one time, and the large friction force between the large-mass rotor and the platform makes the rotor difficult to achieve the concentric purpose through translation.
Disclosure of Invention
The invention aims to overcome the defects and provides an automatic centering installation device for a high-mass cantilever rotor over-rotation test and a working method, and the technical problem that the high-mass cantilever rotor and a gearbox of an over-rotation test bed are difficult to communicate and position is solved. The invention can accurately position the concentricity of the rotating shaft and the inner hole of the gear box.
In order to achieve the above purpose, the invention provides the following technical scheme:
an automatic centering installation device for a high-mass cantilever rotor over-rotation test comprises a rotating shaft, a guide structure, a tray, a ball, a liftable installation platform and a locking nut;
the guide structure comprises a conical section and a cylindrical section connected with the conical section, the cylindrical section is of a hollow structure, the cylindrical section is sleeved at the upper end of the rotating shaft, and the upper end of the rotating shaft is inserted into an inner hole of the gear box under the guide effect of the conical section; the locking nut is used for locking the upper end of the rotating shaft and the inner hole of the gear box after the guide structure is removed;
the rotor is fixedly connected to the lower end of the rotating shaft, the rotor is arranged on the upper surface of the tray, and the lower surface of the tray is in contact with the liftable mounting platform through the balls;
the lifting of the lifting mounting platform drives the lifting of the tray.
Furthermore, the conical section of the guide structure is of a solid structure, and the cone angle of the conical section is 30-90 degrees.
Furthermore, the cylindrical section of the guide structure is connected with the upper end of the rotating shaft through threads, and the cylindrical section is in clearance fit with the inner hole of the gear box;
the length of the cylindrical section is 10 mm-15 mm.
Further, the roughness of the outer surface of the guide structure is less than 0.8Ra.
Furthermore, the lower surface of the tray is provided with a groove for mounting the ball, and the depth of the groove is 1/4-1/2 of the diameter of the ball.
Further, the distribution mode of the balls on the lower surface of the tray is as follows:
the center of the lower surface of the tray is provided with a ball, the rest balls are arranged into n circles of concentric circles taking the center of the lower surface of the tray as the center of a circle, n is larger than or equal to 3, and the distance between the outermost circle of concentric circles and the edge of the lower surface of the tray is larger than or equal to the diameter of the ball.
Furthermore, the diameter of the ball is 10-20mm.
Furthermore, the tray is circular, and the radius of the tray is larger than the radius of the rotor and is less than or equal to 1.5 times of the radius of the rotor;
liftable mounting platform upper surface is equipped with ring baffle, and the tray is located in the ring baffle, ring baffle is higher than the tray lower surface and is less than the tray upper surface.
Further, when the rotor is arranged on the upper surface of the tray, the gravity center of the rotor is located in the range of the innermost circle of balls on the lower surface of the tray.
A working method of an automatic centering installation device for a large-mass cantilever rotor over-rotation test comprises the following steps:
sleeving the guide structure on the upper end of the rotating shaft;
fixedly connecting the rotor to the lower end of the rotating shaft, and placing the rotor on the upper surface of the tray;
the tray is arranged on the lifting mounting platform through the balls;
the liftable mounting platform rises, the guide structure, the rotating shaft, the rotor and the tray rise integrally, and meanwhile, the position of the tray on the liftable mounting platform is adjusted through the balls, so that the rotating shaft and the inner hole of the gear box are concentric;
the upper end of the rotating shaft is inserted into the inner hole of the gear box under the guiding action of the conical section, and the guiding structure penetrates out of the inner hole of the gear box;
removing the guide structure;
and a locking nut is arranged on the part of the rotating shaft after the guide structure is removed.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention creatively provides an automatic centering method combining conical surface guiding and rolling micro-friction, the position of a rotor can be adjusted randomly in the horizontal direction, and the concentricity of a rotating shaft and an inner hole of a gear box can be accurately positioned in the process of mounting the rotor from bottom to top through conical surface guiding, so that the labor is greatly saved, and the test efficiency and the safety are improved;
(2) According to the invention, by optimally designing the taper angle of the conical section and the outer diameter size of the cylindrical section, the guiding precision and the positioning precision can be improved, and the impact force on the conical surface in the automatic centering process and the friction force between the cylindrical section and the inner hole during vertical lifting are reduced;
(3) The tray and the balls can freely move in the horizontal direction, and the balls are directly contacted with the lifting mounting platform, so that only a small rolling friction force is generated in the translation process, and the efficient positioning of the rotating shaft and the inner hole of the gear box is facilitated;
(4) The invention designs the distribution mode of the balls, provides a foundation for the omnibearing movement of the rotor and ensures that the device is safer and more reliable in the working process.
Drawings
FIG. 1 is a schematic view of the connection of a rotor of the present invention to a gearbox of an over-rotation test stand;
FIG. 2 is a schematic view of the rotor of the present invention after the connection with the gearbox of the over-rotation test stand is completed;
FIG. 3 is a schematic view of a conical guide structure according to the present invention;
fig. 4 is a side view of the tray of the present invention.
FIG. 5 is a plan view of the ball position of the present invention;
in the drawings, 1-the axis of rotation; 2-a guide structure; 3-a bolt; 4-a rotor; 5-a tray; 6-rolling balls; 7-lifting the mounting platform; 8-a conical section; 9-a cylindrical section; 10-external thread; 11-a gearbox; 12-locking nut.
Detailed Description
The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The invention provides a self-centering mounting device for a high-mass cantilever rotor over-rotation test, which utilizes the principles of conical surface automatic centering and small friction force of balls to design a rotating shaft conical guide structure and a ball tray structure, can adjust the position of a rotor in all directions by lightly touching the rotor in the horizontal direction with hands, and can accurately position the concentricity in the lifting process by utilizing conical surface guide, thereby greatly saving manpower and improving the test efficiency and safety.
Specifically, the self-centering mounting device for the high-mass cantilever rotor over-rotation test comprises a guide structure and a ball tray; wherein guide structure includes cone section and cylinder section, and the ball tray includes tray and the ball as the tray base.
Optionally, the tray is circular.
Optionally, the conical section is of a solid structure and plays a role in guiding, and the optimal guiding cone angle range is 30-90 degrees.
Optionally, the cylindrical section is of a hollow structure and plays a role in positioning, the inner diameter of the cylindrical section is a thread and is connected with the external thread at the end of the rotating shaft, the matching precision of the outer diameter of the cylindrical section and the inner hole of the gear box is small clearance fit, and the optimal range of the length of the cylindrical section is 10mm to 15mm;
optionally, the surface roughness of the conical surface and the cylindrical surface is required to be less than 0.8.
Optionally, the upper surface of the ball tray is a plane, the lower surface of the ball tray is a groove surface, the groove is used for placing balls, and the depth of the groove is 1/3 of the diameter of the balls.
Optionally, a ball is placed at the center of the tray with the diameter of 10-20mm, the rest balls are radially distributed outwards with the center of the tray as the center of a circle, the included angle between the two adjacent balls and the connecting line of the center of the circle is 30 degrees, each diameter direction consists of 7 balls, namely, 3 circles of balls, and the center of the outermost circle of balls is 30mm away from the edge of the tray.
In the process of mounting the rotor from bottom to top, the rotating shaft is inserted into the inner hole of the gear box by means of the conical surface, then the guiding is carried out through the conical surface, the position of the rotor in the horizontal direction is automatically adjusted by using the ball bearing tray in the guiding process, finally the rotating shaft and the inner hole of the gear box are concentric, and finally the cylindrical surface and the inner hole of the rotating shaft are matched and positioned to finish the mounting of the rotating shaft.
The embodiment is as follows:
this embodiment will be described in detail with reference to fig. 1 to 5.
Fig. 1 is a self-centering mounting device for a large-mass cantilever rotor over-rotation test of this embodiment, and includes a rotating shaft 1, a guide structure 2, a tray 5, a ball 6, a liftable mounting platform 7 and a lock nut 12. Wherein a rotor 4 to be tested is connected to the rotating shaft 1 by bolts 3. In the experiment, with guide structure 2 through the inside threaded connection of cylinder section 9 on the outside screw thread 10 of pivot 1, accomplish rotor 4 and pivot 1's being connected afterwards, and the whole is laid on tray 5, can realize rotor 4's all-round free movement through ball 6 between tray 5 and the liftable mounting platform 7, the design has the loop configuration around the liftable mounting platform 7 in order to prevent that tray 5 from droing, this loop configuration height is in order to be greater than tray 5 lower surface and not to exceed tray 5 upper surface and be suitable. The height and the plane position of the rotor 4 are adjusted to complete the installation of the rotating shaft 1 to the gear box 11, and when the rotating shaft 1, the conical guide structure 2, the rotor 4 and the tray 5 are moved into a whole. After the centering installation is completed, the guide structure 2 is detached and replaced by the lock nut 12, and the assembly work of the large-mass cantilever rotor over-rotation test is completed, as shown in fig. 2.
Fig. 3 is a partial schematic view of the conical guide structure 2 of fig. 1. Wherein, the conical section 8 is a solid structure and plays a role in guiding, and the optimal guiding cone angle range is 30-90 degrees; the cylindrical section 9 is of a hollow structure and plays a role in positioning, the inner diameter of the cylindrical section is a thread and is connected with the end of the rotating shaft 1 through the thread, the thickness of the locking nut 12 in the final assembly is 8mm, the gasket factor is considered, the structural redundancy is avoided, and the optimal range of the length of the cylindrical section 9 is 10 mm-15 mm; meanwhile, as the gear box 11 is in small clearance fit with the cylindrical surface of the rotating shaft 1, the surface roughness of the conical section 8 and the cylindrical section 9 is less than 0.8 for smooth assembly.
Fig. 4 and 5 are partial schematic views of the positions of the tray 5 and the balls 6 in fig. 1, wherein the upper surface of the tray 5 is a plane, and the radius of the upper surface of the tray is larger than that of the rotor 4 but not more than 1.5 times of the radius of the rotor 4, so that the rotor 4 can be completely arranged on the tray 5 and the position of the gravity center is not deviated from the position of the first circle of balls. The lower surface of the tray 5 is a groove surface, the groove is used for placing the ball 6, and the depth of the groove is 1/3 of the diameter of the ball 6 so as to prevent the ball from falling off. The diameter of the balls 6 is 10-20mm, and the specific size is selected according to the diameter of the tray 5, so that the balls in the first circle are ensured not to interfere with each other. A ball 6 is placed at tray 5 center, and other balls 6 use tray 5 center as the centre of a circle, outwards are radial distribution, and the contained angle of two adjacent balls and centre of a circle line is 30 degrees, and every diametric (al) comprises 7 balls 6, 3 circles of balls 6 altogether promptly, and 6 central distances of outer peripheral round ball should exceed a ball diameter from tray 5 edge.
The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the invention. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (10)
1. An automatic centering installation device for a large-mass cantilever rotor over-rotation test is characterized by comprising a rotating shaft (1), a guide structure (2), a tray (5), balls (6), a liftable installation platform (7) and a locking nut (12);
the guide structure (2) comprises a conical section and a cylindrical section connected with the conical section, the cylindrical section is of a hollow structure, the cylindrical section is sleeved at the upper end of the rotating shaft (1), and the upper end of the rotating shaft (1) is inserted into an inner hole of the gear box under the guide effect of the conical section; the locking nut (12) is used for locking the upper end of the rotating shaft (1) and the inner hole of the gear box after the guide structure (2) is removed;
the rotor (4) is fixedly connected to the lower end of the rotating shaft (1), the rotor (4) is arranged on the upper surface of the tray (5), and the lower surface of the tray (5) is in contact with the liftable mounting platform (7) through the balls (6);
the lifting of the lifting mounting platform (7) drives the lifting of the tray (5).
2. The automatic centering mounting device for the over-rotation test of the large-mass cantilever rotor according to claim 1, wherein the conical section of the guide structure (2) is a solid structure, and the cone angle of the conical section is 30-90 degrees.
3. The automatic centering mounting device for the over-rotation test of the large-mass cantilever rotor according to claim 1, wherein the cylindrical section of the guide structure (2) is in threaded connection with the upper end of the rotating shaft (1), and the cylindrical section is in clearance fit with an inner hole of the gear box;
the length of the cylindrical section is 10 mm-15 mm.
4. The automatic centering mounting device for the over-rotation test of the large-mass cantilever rotor according to claim 1, wherein the roughness of the outer surface of the guide structure (2) is less than 0.8Ra.
5. The automatic centering mounting device for the over-rotation test of the large-mass cantilever rotor according to claim 1, wherein the lower surface of the tray (5) is provided with a groove for mounting the ball (6), and the depth of the groove is 1/4-1/2 of the diameter of the ball (6).
6. The automatic centering installation device for the over-rotation test of the large-mass cantilever rotor according to claim 1, wherein the balls (6) are distributed on the lower surface of the tray (5) in a way that:
the center of the lower surface of the tray (5) is provided with a ball (6), the rest balls (6) are arranged into n circles of concentric circles taking the center of the lower surface of the tray (5) as the center of a circle, n is larger than or equal to 3, and the distance between the outermost circle of concentric circles and the edge of the lower surface of the tray (5) is larger than or equal to the diameter of the ball (6).
7. A high mass cantilever rotor over-rotation test self-centering mounting device according to claim 6, wherein the diameter of the ball (6) is 10-20mm.
8. The automatic centering mounting device for the over-rotation test of the large-mass cantilever rotor according to claim 1, wherein the tray (5) is circular, and the radius of the tray (5) is larger than that of the rotor (4) and is less than or equal to 1.5 times of that of the rotor (4);
liftable mounting platform (7) upper surface is equipped with annular baffle, and tray (5) are located in the annular baffle, annular baffle is higher than tray (5) lower surface and is less than tray (5) upper surface.
9. The automatic centering mounting device for the over-rotation test of the high-mass cantilever rotor according to claim 6, wherein when the rotor (4) is placed on the upper surface of the tray (5), the gravity center of the rotor (4) is within the range of the innermost circle of balls (6) on the lower surface of the tray (5).
10. The working method of the automatic centering mounting device for the high-mass cantilever rotor over-rotation test according to any one of claims 1 to 9, is characterized by comprising the following steps:
sleeving the guide structure (2) on the upper end of the rotating shaft (1);
fixedly connecting the rotor (4) to the lower end of the rotating shaft (1), and placing the rotor (4) on the upper surface of the tray (5);
the tray (5) is arranged on the lifting mounting platform (7) through the balls (6);
the lifting mounting platform (7) rises, the guide structure (2), the rotating shaft (1), the rotor (4) and the tray (5) rise integrally, and meanwhile, the position of the tray (5) on the lifting mounting platform (7) is adjusted through the balls (6), so that the rotating shaft (1) and the inner hole of the gear box are concentric;
the upper end of the rotating shaft (1) is inserted into the inner hole of the gear box under the guiding action of the conical section, and the guiding structure (2) penetrates out of the inner hole of the gear box;
dismantling the guide structure (2);
and a locking nut (12) is arranged at the part of the rotating shaft (1) after the guide structure (2) is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211059081.3A CN115524105A (en) | 2022-08-31 | 2022-08-31 | Automatic centering installation device for large-mass cantilever rotor over-rotation test and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211059081.3A CN115524105A (en) | 2022-08-31 | 2022-08-31 | Automatic centering installation device for large-mass cantilever rotor over-rotation test and working method |
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| Publication Number | Publication Date |
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| CN115524105A true CN115524105A (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211059081.3A Pending CN115524105A (en) | 2022-08-31 | 2022-08-31 | Automatic centering installation device for large-mass cantilever rotor over-rotation test and working method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115876454A (en) * | 2023-03-03 | 2023-03-31 | 西安航天动力研究所 | Over-rotation test method and over-rotation test stand |
-
2022
- 2022-08-31 CN CN202211059081.3A patent/CN115524105A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115876454A (en) * | 2023-03-03 | 2023-03-31 | 西安航天动力研究所 | Over-rotation test method and over-rotation test stand |
| CN115876454B (en) * | 2023-03-03 | 2023-07-14 | 西安航天动力研究所 | Overrun test method and overrun test stand |
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