Rotor system bending excitation structure based on cam structure

Abstract

The utility model relates to a rotor system excitation structure, in particular to a rotor system bending excitation structure based on a cam structure. The rotor system bending excitation structure based on the cam structure is composed of a rubber pad, a set screw, a push rod, a support, a spring, a clamp spring and a cam shaft. The push rod is installed in a hole in the upper end face of an inner cavity of the support, the snap spring is installed in an annular groove in the lower end of the push rod, the spring is installed on the push rod, the upper end of the spring makes contact with the top of the inner cavity of the support, and the position of the lower end of the spring is limited through the snap spring; the cam part of the camshaft contacts with the lower end of the push rod. According to the bending excitation structure of the rotor system, the continuous rotating motion of the cam shaft is converted into the reciprocating linear motion of the push rod, and meanwhile, under the combined action of the spring, the shaft system arranged on the rubber pad generates periodically changing vibration.

Description

Technical Field

[0001] The utility model relates to the technical field of excitation of rotor systems, in particular to a bending excitation structure of a rotor system based on a cam structure. Background Art

[0002] The rotor system is an important part of rotating machinery and is widely used in various mechanical equipment in production and life. Due to the influence of load fluctuations, clearances between parts and some other external factors, there is a bending vibration phenomenon in the rotor system during operation. When the external excitation frequency is close to or the same as the natural frequency of the rotor system, the rotor system may generate severe bending resonance, which can easily lead to damage and failure of components in the rotor system. Therefore, it is necessary to conduct a bending vibration test on the rotor system.

[0003] When conducting a bending vibration test on the rotor system, an external excitation structure needs to be installed. For this purpose, a bending excitation structure of the rotor system is designed. This bending excitation structure of the rotor system can convert continuous rotational motion into reciprocating linear motion. Under the combined action of the rotation of the cam and the rapid reset of the spring, the reciprocating motion of the push rod can enable the parts excited on the rotor system to obtain periodic bending vibrations of a certain form and magnitude. Summary of the Invention

[0004] This utility model improves the structure and designs a bending excitation structure of a rotor system based on a cam structure, including: a rubber pad, a set screw, a push rod, a bracket, a spring, a circlip and a camshaft. The camshaft should be installed in the through hole on the side of the bracket, and the camshaft is fixed through the keyway and shaft shoulder provided on the camshaft. The push rod is installed in the through hole on the upper end surface of the bracket, and the spherical ball at the lower end of the push rod contacts the cam in the camshaft. The lower end of the spring is installed in the annular groove provided at the lower end of the push rod, and the upper end of the spring contacts the top of the inner cavity of the bracket. The circlip is placed at the lower end of the spring and fixes it. The rubber pad is placed in the U-shaped groove above the push rod, and the set screw fastens the rubber pad in the U-shaped groove above the push rod. Four through holes are evenly arranged at the bottom of the bracket for connecting with related rotor system parts. A cavity is dug in the center of the bracket. There is a through hole on the upper end surface and the side surface of the cavity respectively, which can be used to install the push rod and the camshaft. The rubber pad is U-shaped, and two through holes are evenly arranged on the rubber pad for connecting with the U-shaped groove at the upper end of the push rod through the set screw. The uppermost end of the push rod is a U-shaped groove, and two threaded holes are evenly arranged on the U-shaped groove. The lowermost end of the push rod is hemispherical, and there is an annular groove below the push rod. The push rod is installed in the through hole on the upper end surface of the inner cavity of the bracket, and the lowermost end of the push rod contacts the cam part of the camshaft. There are 2 set screws for fixing the rubber pad and the push rod. The camshaft is designed with a keyway and a shaft shoulder structure, and the cam part of the camshaft is placed in the inner cavity of the bracket through the through hole on the side of the bracket. The shaft of the camshaft is installed in the hole on the side of the bracket. The circlip is installed in the annular groove of the push rod. The spring is sleeved on the push rod, and the spring is placed between the inner cavity of the bracket and the circlip, and the spring is fixed with the circlip.

[0005] The bending excitation structure of the rotor system of this utility model converts the continuous rotational motion into the reciprocating linear motion of the push rod by using a cam. Under the combined action of the rotation of the cam and the rapid reset of the spring, the shafting placed on the rubber pad generates periodic bending vibration, which has the advantages of simple structure, easy installation and disassembly, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is the overall two-dimensional drawing of this utility model.

[0007] Figure 2 It is the overall three-dimensional drawing of this utility model.

[0008] Figure 3 It is the overall three-dimensional exploded view of this utility model.

[0009] Figure 4 It is the three-dimensional drawing of the rubber pad adopted in this utility model. DETAILED DESCRIPTION OF THE INVENTION

[0010] To more clearly illustrate the technical solutions implemented by the present utility model, the concept and specific structure of the present utility model will be specifically described below in conjunction with the accompanying drawings.

[0011] As Figures 1-4 shown, a bending excitation structure of a rotor system designed by the present utility model includes: a rubber pad 1, a set screw 2, a push rod 3, a bracket 4, a spring 5, a snap ring 6, and a camshaft 7.

[0012] The bracket 4 is evenly provided with four through holes for connecting with relevant rotor system parts. A cavity is designed in the center of the bracket 4, and a through hole is respectively provided on the upper end face and the side surface of the cavity for installing the camshaft 7 and the push rod 3.

[0013] The rubber pad 1 is U-shaped, and two through holes are evenly arranged on the rubber pad 1.

[0014] The uppermost end of the push rod 3 is a U-shaped groove, and the lowermost end is hemispherical. Two threaded holes are evenly arranged on the U-shaped groove. An annular groove is arranged at the lower end of the push rod 3. The push rod 3 is vertically installed in the hole on the upper end face of the inner cavity of the bracket 4.

[0015] There are 2 set screws 2 for fixing the rubber pad 1 and the push rod 3.

[0016] The snap ring 6 is installed in the annular groove of the push rod 3. The spring 5 is sleeved on the push rod 3 and is placed between the inner cavity of the bracket 4 and the snap ring 6. The camshaft 7 is provided with a keyway and a shaft shoulder structure, and the cam part of the camshaft 7 is placed in the inner cavity of the bracket 4, and the rod of the camshaft 7 is installed in the hole on the side surface of the bracket 4.

[0017] In the specific implementation process, the push rod 3 is vertically installed in the hole on the upper end of the inner cavity of the bracket 4. The rubber pad 1 is fixed on the U-shaped groove at the upper end of the push rod 3 by the set screw 2. The snap ring 6 is installed in the annular groove at the lower end of the push rod 3. The spring 5 is installed on the push rod 3. The upper end of the spring 5 contacts the top of the inner cavity of the bracket 4, and the lower end of the spring 5 contacts the snap ring 6 to fix the spring 5 on the push rod 3. The shaft of the camshaft 7 is installed in the hole on the side surface of the inner cavity of the bracket 4, and the cam part of the camshaft 7 contacts the lowermost end of the push rod 3.

Claims

1. Based on the cam structure rotor system bending excitation structure, it is characterized by: The structure comprises a rubber pad (1), a set screw (2), a push rod (3), a bracket (4), a spring (5), a retaining ring (6) and a camshaft (7). The camshaft (7) should be installed in a through hole on the side of the bracket (4) and fixed to the shaft shoulder through a keyway provided on the camshaft (7). The push rod (3) should be installed in a through hole on the upper end surface of the bracket (4). The ball at the lower end of the push rod (3) is placed in contact with a cam in the camshaft (7). The lower end of the spring (5) is installed in an annular groove provided at the lower end of the push rod (3). The upper end of the spring (5) is in contact with the top of the inner cavity of the bracket (4). The retaining ring (6) is placed at the lower end of the spring (5) and fixes it. The rubber pad (1) is placed in a U-shaped groove above the push rod (3). The set screw (2) fastens the rubber pad (1) to the U-shaped groove above the push rod (3).

2. The cam structure rotor system bending excitation structure according to claim 1 is characterized in that: Four through holes are evenly arranged at the bottom of the bracket (4) for connection with related rotor system parts. The center of the bracket (4) is designed with an inner cavity, and the upper end surface and side surface of the inner cavity are respectively provided with a through hole for installing the push rod (3) and the camshaft (7).

3. The cam structure rotor system bending excitation structure according to claim 1 is characterized in that: The rubber pad (1) is U-shaped, and two through holes are evenly arranged on the rubber pad (1).

4. The cam structure rotor system bending excitation structure according to claim 1, characterized in that: The uppermost end of the push rod (3) is a U-shaped groove, and two threaded holes are evenly arranged on the U-shaped groove. The lowermost end of the push rod (3) is hemispherical, and there is an annular groove below the push rod (3). The push rod (3) is installed in the through hole on the upper end surface of the inner cavity of the bracket (4), and the lowermost end of the push rod (3) contacts the cam part of the camshaft (7).

5. The cam structure-based rotor system bending excitation structure according to claim 1, characterized in that: There are two set screws (2) for fixing the rubber pad (1) and the push rod (3).

6. The cam structure-based rotor system bending excitation structure according to claim 1, characterized in that: The clamping ring (6) is installed in the annular groove of the push rod (3).

7. The cam structure rotor system bending excitation structure according to claim 1 is characterized in that: The spring (5) is sleeved on the push rod (3), and the spring (5) is placed between the inner cavity of the bracket (4) and the clamping spring (6).

8. The cam structure rotor system bending excitation structure according to claim 1, characterized in that: The camshaft (7) is designed with a keyway and a shaft shoulder structure, and the cam portion of the camshaft (7) is placed in the inner cavity of the bracket (4), and the shaft of the camshaft (7) is installed in a hole on the side of the bracket (4).

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