Short rotor auxiliary starting device

Abstract

The present invention discloses a short rotor auxiliary starting device, comprising: a centering chassis, a through hole for positioning an auxiliary support rod is formed in the middle, a connecting boss is formed in the middle of the top, a threaded hole with the same diameter and axis as the through hole and in communication is formed in the middle of the connecting boss; an auxiliary support rod passes through the through hole and the threaded hole of the centering chassis, and an external thread is formed on the outside of the upper end thereof to match the threaded hole; a support head is arranged at the bottom end of the auxiliary support rod. The use of the present invention completes the auxiliary starting of a single pin-type lower support-constrained short rotor, shortens the test preparation time, reduces the difficulty of operation, improves the safety of the test of this type of rotor, and can adapt to single pin-type lower support-constrained short rotor systems of various sizes.

Description

Technical Field

[0001] The invention belongs to the field of rotor dynamics test devices, and in particular relates to a short rotor auxiliary starting device. Background Art

[0002] In rotor dynamics tests, a type of short rotor constrained by only a single pin-type lower support is widely used as a test object for component strength testing and reliability verification. This type of rotor will tip over and cannot remain upright when stationary; when the spin reaches a certain speed, it can automatically maintain an upright and stable rotation due to the gyroscopic effect. During the process of starting and speeding up from a stationary state, an auxiliary device is required to straighten the rotor until the rotor reaches a stable state of self-spin. Usually, this type of short rotor is mainly started by manual straightening or by rubbing the outer edge of the test rotor against the test bench. Manual operation mainly depends on the operator's experience, is difficult, and the test piece is easy to pop out, which is dangerous to the operator. The method of rubbing the outer edge of the rotor has a large impact force on the rotor and is easy to damage the structure of the rotor. At present, there is no device that can complete the auxiliary starting of a short rotor constrained by a single pin-type lower support, so a high-safety and highly operable auxiliary starting device suitable for this type of rotor is needed. Summary of the invention

[0003] The present invention is proposed to overcome the shortcomings in the prior art, and its purpose is to provide a short rotor auxiliary starting device.

[0004] The present invention is achieved through the following technical solutions:

[0005] A short rotor auxiliary starting device, comprising:

[0006] A through hole for positioning the auxiliary support rod is formed in the center of the center chassis, a connecting boss is formed in the middle of the top, and a threaded hole with the same diameter and coaxiality as the through hole and in communication with the connecting boss is formed in the middle of the connecting boss.

[0007] An auxiliary support rod, which passes through the through hole and the threaded hole of the centering chassis, and an external thread matching the threaded hole is formed on the outer portion of the upper end thereof;

[0008] The supporting head is arranged at the bottom end of the auxiliary supporting rod.

[0009] The above technical solution also includes a positioning nut which is arranged above the connecting boss and is threadedly connected to the auxiliary supporting rod.

[0010] In the above technical solution, it also includes at least one operating handle arranged on the centering chassis.

[0011] In the above technical solution, the auxiliary support rod is an aluminum cylindrical long rod, and a screw hole for connecting the support head is formed on the bottom surface of the auxiliary support rod.

[0012] In the above technical solution, the upper outer wall of the support head forms an external thread connected to the screw hole at the bottom of the auxiliary support rod, and the lower outer wall is a smooth surface.

[0013] In the above technical solution, the lower portion of the support head contacts the hole on the short rotor test piece.

[0014] In the above technical solution, the centering chassis is in the shape of a cylindrical flange, and a positioning boss is formed on its bottom surface for cooperating with the inner edge of the outer sleeve of the test bench.

[0015] In the above technical solution, the centering chassis forms a plurality of mounting holes evenly distributed along the circumference for assembling the operating handle.

[0016] In the above technical solution, the centering chassis forms a plurality of connection holes evenly distributed along the circumference for fixing to the outer sleeve of the test bench.

[0017] In the above technical solution, the connection holes are distributed outside the mounting hole.

[0018] The beneficial effects of the present invention are:

[0019] The present invention provides an auxiliary starting device suitable for a single needle-type lower support constrained short rotor system of various sizes. By using the device, the auxiliary starting of the single needle-type lower support constrained short rotor is completed, the test preparation time is shortened, the operation difficulty is reduced, and the safety of the test on this type of rotor is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the short rotor auxiliary starting device of the present invention;

[0021] Figure 2 It is a schematic diagram of the working principle of the short rotor auxiliary starting device of the present invention.

[0022] in:

[0023] 1 Centering chassis

[0024] 11 Positioning boss 12 Connecting boss

[0025] 13 Mounting hole 14 Connection hole

[0026] 2 Auxiliary support rod

[0027] 3 Support head

[0028] 4 Locating nut

[0029] 5 Operating handle.

[0030] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the short rotor auxiliary starting device of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0032] like Figure 1 As shown, a short rotor auxiliary starting device comprises:

[0033] The chassis 1 is centered, a through hole is formed in the middle thereof for positioning the auxiliary support rod 2, a connecting boss 12 is formed in the middle of the top, and a threaded hole is formed in the middle of the connecting boss 12 that is coaxial with the through hole and communicates with the through hole;

[0034] Auxiliary support rod 2, which passes through the through hole and threaded hole of the centering chassis 1;

[0035] A support head 3, which is arranged at the bottom end of the auxiliary support rod 2;

[0036] The positioning nut 4 is a cylindrical nut with a screw hole in the middle, which is arranged above the connecting boss 12 and is threadedly connected to the auxiliary support rod 2. The axial positioning of the auxiliary support rod can be achieved by rotating the nut and locking it;

[0037] An operating handle 5 is arranged on the centering chassis 1 .

[0038] The centering chassis 1 is in the shape of a cylindrical flange, and a positioning boss 11 is formed on its bottom surface for cooperating with the inner edge of the outer sleeve of the test bench; a plurality of mounting holes 13 for assembling the operating handle 5 are formed on the centering chassis 1 and are evenly distributed along the circumference; a plurality of connecting holes 14 for connecting to the outer sleeve of the test bench are formed on the centering chassis 1 and are evenly distributed along the circumference; the connecting holes 14 are distributed on the outside of the mounting holes 13.

[0039] The through hole of the centering chassis 1 and the threaded hole of the connecting boss 12 realize the installation and positioning of the auxiliary support rod 2.

[0040] The auxiliary support rod 2 is an aluminum cylindrical long rod, and a screw hole for connecting support heads 3 of different sizes is formed on the bottom surface of the auxiliary support rod 2.

[0041] The support head 3 is a short cylindrical rod made of polytetrafluoroethylene plastic, the upper outer wall forms an external thread connected to the screw hole at the bottom of the auxiliary support rod 2, and the lower outer wall is a smooth surface to minimize friction.

[0042] The lower part of the support head 3 contacts the hole on the short rotor test piece, which plays a role in straightening the rotor and assisting in starting.

[0043] Working principle of the present invention:

[0044] like Figure 2As shown, the working principle of the auxiliary starting device of the present invention is to limit the inclination angle of the test rotor by using the friction force between the support head and the center hole of the lower end cover of the short rotor, thereby preventing the lower end cover of the rotor from rubbing against the surface of the motor during the test and achieving auxiliary starting.

[0045] By adjusting the upper and lower positions of the auxiliary support rod and replacing different support heads, the auxiliary starting requirements of rotors of different sizes can be met.

[0046] Working process of the present invention:

[0047] First, install the centering chassis on the test sleeve, select a support head of appropriate size, rotate and insert it, adjust it to the appropriate height, so that the support head is inserted into the center hole of the lower end cover of the test rotor, and then tighten the positioning nut; then, start the motor rotor to start rotating, the friction of the support head will gradually become more intense as the speed increases, and then the rotor amplitude will decrease and lose contact with the support head; at the end of the test, remove the positioning nut, then unscrew the auxiliary support rod, and finally remove the centering chassis to complete the auxiliary starting operation.

[0048] The present invention provides an auxiliary starting device suitable for a single needle-type lower support constrained short rotor system of various sizes. By using the device, the auxiliary starting of the single needle-type lower support constrained short rotor is completed, the test preparation time is shortened, the operation difficulty is reduced, and the safety of the test on this type of rotor is improved.

[0049] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0052] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A short rotor auxiliary starting device, characterized in that: include: A through hole for positioning the auxiliary support rod (2) is formed in the center of the center chassis (1), a connecting boss (12) is formed in the center of the top, and a threaded hole with the same diameter and coaxiality as the through hole and in communication with the connecting boss (12) is formed in the center. An auxiliary support rod (2), which passes through the through hole and the threaded hole of the centering chassis (1), and the outer portion of the upper end of the auxiliary support rod (2) is formed with an external thread that matches the threaded hole; A support head (3) is arranged at the bottom end of the auxiliary support rod (2); the auxiliary support rod (2) is a cylindrical long rod, the bottom surface of which is formed with a screw hole for connecting the support head (3); the upper outer wall of the support head (3) is formed with an external thread connected to the screw hole at the bottom of the auxiliary support rod (2); and the lower outer wall is a smooth surface.

2. The short rotor auxiliary starting device according to claim 1, characterized in that: It also includes a positioning nut (4) which is arranged above the connecting boss (12) and is threadedly connected to the auxiliary supporting rod (2).

3. The short rotor auxiliary starting device according to claim 1, characterized in that: It also includes at least one operating handle (5) arranged on the centering chassis (1).

4. The short rotor auxiliary starting device according to claim 1, characterized in that: The lower part of the support head (3) contacts the hole on the short rotor test piece.

5. The short rotor auxiliary starting device according to claim 1, characterized in that: The centering chassis (1) is in the shape of a cylindrical flange, and its bottom surface forms a positioning boss (11) for cooperating with the inner edge of the outer sleeve of the test bench.

6. The short rotor auxiliary starting device according to claim 1, characterized in that: The centering chassis (1) forms a plurality of mounting holes (13) evenly distributed along the circumference for mounting the operating handle (5).

7. The short rotor auxiliary starting device according to claim 1, characterized in that: The centering chassis (1) is formed with a plurality of connection holes (14) evenly distributed along the circumference and used for fixing to the outer sleeve of the test bench.

8. The short rotor auxiliary starting device according to claim 7, characterized in that: The connection holes (14) are distributed outside the mounting holes (13).

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