Center tube positioning device for rotating rotor

Abstract

The present invention discloses a central tube positioning device for a rotating rotor, comprising a cover plate, the top of which is formed with an upper convex ring and an inner convex platform from the outside to the inside, and the bottom of which is formed with a lower convex ring; a stepped through hole is formed in the middle of the inner convex platform, and a plurality of through holes are formed on the cover plate. The present invention can limit the axial and radial displacement of the central tube, so that the rotor does not touch the central tube during the suspended micro-rotation torsion pendulum, and effectively assists in the measurement of the rotational inertia of the rotor with the central tube.

Description

Technical Field

[0001] The invention belongs to the technical field of rotary machinery, and in particular relates to a central tube positioning device for a rotary rotor. Background Art

[0002] In rotating machinery, the rotor is one of the core components. The rotor runs under high-speed loads, and its moment of inertia plays an important role in the study of rotational dynamics and the measurement of friction power consumption. However, the rotor is assembled from dozens of parts, with a relatively complex geometry and uneven internal mass distribution. It is difficult to accurately calculate the rotor's moment of inertia in theory, and experimental methods are often required to measure it. One of the commonly used methods for testing the rotor's moment of inertia is the micro-torsional vibration method, which requires the rotor to be suspended vertically and excited to make a micro-rotational torsion pendulum under the action of gravity. Then, parameters such as the rotation period and swing radius are measured to obtain the rotor's moment of inertia.

[0003] However, for the rotor structure containing a center tube inside, the center tube is pre-installed in the rotor and is a non-rotating component. The movable space in the axial and radial range inside the rotor is very small. Therefore, how to suspend the center tube in the axial and radial directions so that the rotor does not hit the center tube during a slight rotation and torsional swing, and ensure the effective measurement of the rotational inertia of the rotor with the center tube, is a key technology that needs to be solved. Summary of the invention

[0004] The present invention is proposed to overcome the shortcomings in the prior art, and its purpose is to provide a central tube positioning device for a rotating rotor.

[0005] The present invention is achieved through the following technical solutions:

[0006] A central tube positioning device for a rotating rotor comprises a cover plate, the top of which is formed with an upper convex ring and an inner convex platform in sequence from the outside to the inside, and the bottom of which is formed with a lower convex ring; a stepped through hole is formed in the middle of the inner convex platform, and a plurality of through holes are formed on the cover plate.

[0007] In the above technical solution, the plurality of through holes are evenly distributed along the circumference.

[0008] In the above technical solution, the through hole is an oblong hole and is formed on the cover plate between the upper convex ring and the lower convex ring.

[0009] In the above technical solution, the cover plate is arranged on the rotor test bench.

[0010] In the above technical solution, the lower convex ring matches the inner diameter of the rotor test bench.

[0011] In the above technical solution, a support tube is sleeved on the outside of the upper convex ring, and the two are interference fit.

[0012] In the above technical solution, the stepped through hole has an upper diameter larger than a lower diameter, and both the upper and lower diameters match the central tube.

[0013] In the above technical solution, the outer wall of the upper end of the upper convex ring forms a conical surface.

[0014] The beneficial effects of the present invention are:

[0015] The invention provides a central tube positioning device for a rotating rotor, which can solve the problem that the moment of inertia of a rotor with a central tube cannot be detected by fixing the central tube of the rotor axially and radially. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 2 is a schematic structural diagram of a central tube positioning device for a rotating rotor of the present invention;

[0017] Figure 2 It is a top view of the central tube positioning device of the rotating rotor of the present invention.

[0018] in:

[0019] 1 Upper convex ring 2 Inner convex platform

[0020] 3 Center tube 4 Stepped through hole

[0021] 5 Support tube 6 Cover plate

[0022] 7 Lower convex ring 8 Test bench

[0023] 9 Through holes.

[0024] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the central tube positioning device for a rotating rotor of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

[0026] like Figure 1 , 2 As shown, a central tube positioning device for a rotating rotor includes a cover plate 6, on the top of which an upper convex ring 1 and an inner boss 2 are formed in sequence from the outside to the inside, and a lower convex ring 7 is formed at the bottom; a stepped through hole 4 is formed in the middle of the inner boss 2, and a plurality of oblong through holes 9 evenly distributed along the circumference are formed on the cover plate 6.

[0027] The upper convex ring 1 is sleeved with the support tube 5, and the two are interference fit, and the outer wall of the upper end of the upper convex ring 1 forms a conical surface, which is convenient for the assembly of the support tube 5. The upper convex ring 1 realizes the positioning of the support tube 5 of the suspension rope.

[0028] The stepped through hole 4 has an upper diameter larger than a lower diameter, and the upper and lower diameters and the height of the inner boss 2 are made to match the central tube 3, so as to limit and fix the central tube 3 axially and radially.

[0029] The cover plate 6 is arranged on the rotor test bench 8 to support the hanging rope suspension device and the material pipe device.

[0030] The through hole 9 is formed on the cover plate 6 between the upper convex ring 1 and the lower convex ring 7 to provide a rotation space for the suspension rope.

[0031] The lower convex ring 7 matches with the inner diameter of the rotor test bench 8 to position the positioning device in the radial direction of the rotor test bench.

[0032] Working process of the present invention:

[0033] When testing the moment of inertia of the rotor, the rotor is first suspended and placed in the rotor test bench 8, and then the central tube positioning device is radially positioned by the lower convex ring 7 of the central tube positioning device to install it on the top of the rotor test bench 8. The support tube 5 is assembled outside the upper convex ring 1, and the suspension rope on the support tube 5 is connected to the rotor through three evenly distributed through holes 9 of the positioning device to suspend the rotor.

[0034] Lift the central tube 3 in the middle of the rotor, position the central tube 3 on the stepped through hole 4, and lock it with a nut. Since the size of the stepped through hole 4 is made according to the size of the central tube 3, the central tube 3 can be suspended and fixed in the axial and radial directions.

[0035] The central tube positioning device for a rotating rotor provided by the present invention can limit the axial and radial displacements of the central tube, so that the rotor does not hit the central tube during a suspended micro-rotational torsional swing, thereby effectively assisting in the measurement of the rotational inertia of the rotor with the central tube.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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 central tube positioning device for a rotating rotor, characterized in that: It comprises a cover plate (6), the top of which is formed with an upper convex ring (1) and an inner convex platform (2) from the outside to the inside, and the bottom of which is formed with a lower convex ring (7); a stepped through hole (4) is formed in the middle of the inner convex platform (2), and a plurality of through holes (9) are formed on the cover plate (6); The plurality of through holes (9) are evenly distributed along the circumference; The through hole (9) is an oblong hole and is formed on the cover plate (6) between the upper convex ring (1) and the lower convex ring (7); The cover plate (6) is arranged on a rotor test bench (8); The lower convex ring (7) matches the inner diameter of the rotor test bench (8); The upper convex ring (1) is sleeved with a support tube (5) on the outside, and the two are interference fit; The stepped through hole (4) has an upper end diameter that is larger than a lower end diameter, and both the upper and lower end diameters match the central tube (3).

2. The central tube positioning device for a rotating rotor according to claim 1, characterized in that: The outer wall of the upper end of the upper convex ring (1) forms a conical surface.

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