Rotor structure and rotating equipment with same

Abstract

The invention provides a rotor structure and rotating equipment with the rotor structure, the rotor structure comprises a rotating shaft and an inertia adjusting assembly, the inertia adjusting assembly comprises an inertia disc and an inertia block, the inertia disc sleeves the rotating shaft, a concave hole is formed in the peripheral surface of the inertia disc, the inertia block can be arranged in the concave hole in a sliding manner, and when the rotating shaft is in a rotating state, the inertia block is arranged in the concave hole in a sliding manner. The inertia block slides along the concave hole under the action of centrifugal force so as to adjust the rotational inertia of the rotor structure. According to the invention, when the rotor structure is impacted to change the rotating speed of the inertia disc, the inertia block slides along the concave hole under the action of centrifugal force to change the rotational inertia of the inertia adjusting assembly, so that the rotor structure can adaptively adjust the rotational inertia of the rotor structure according to the rotating speeds of different mechanical operation, and stable operation is realized. The rotor structure operates stably, mechanical vibration and noise are reduced, meanwhile, mutual abrasion between the rotating shaft, the bearing and other components is reduced, and the service life of the rotor structure is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of rotating equipment, and in particular relates to a rotor structure and a rotating equipment having the same. Background Art

[0002] In rotating equipment, especially motors and turbines, the stability and balance of the rotor structure are crucial to the operating efficiency and service life of the machine. However, when encountering a large impact, the traditional rotor structure cannot effectively suppress the unbalanced force and vibration caused by the impact, which will affect the mechanical performance and service life of the rotor structure. Summary of the invention

[0003] Therefore, the present invention provides a rotor structure that can solve the technical problem that the traditional rotor structure cannot effectively suppress the unbalanced force and vibration caused by the impact when encountering a large impact, thereby affecting the mechanical properties and service life of the rotor structure.

[0004] In order to solve the above problems, the present invention provides a rotor structure, including a rotating shaft and an inertia adjustment component, the inertia adjustment component including an inertia disk and an inertia block, the inertia disk is mounted on the rotating shaft, a concave hole extending radially along the rotating shaft is configured on the outer circumferential surface of the inertia disk, the inertia block can be slidably arranged in the concave hole, when the rotating shaft is in a rotating state, the inertia block slides along the concave hole under the action of centrifugal force to adjust the rotational inertia of the rotor structure.

[0005] In some embodiments, the inertia adjustment assembly further includes an elastic member, which is located between the bottom of the recessed hole and the inertia block, and one end of the elastic member is connected to the hole wall of the recessed hole, and the other end of the elastic member is connected to the inertia block.

[0006] In some embodiments, the elastic member is made of a magnetic material, the inertia disk is made of a magnetic conductive material, and the elastic member is magnetically connected to the inertia disk; and / or, the elastic member is made of a magnetic material, the inertia block is made of a magnetic conductive material, and the elastic member is magnetically connected to the inertia block.

[0007] In some embodiments, when the inertia block is in an initial state, an end of the inertia block facing away from the bottom of the recessed hole is flush with the opening of the recessed hole or exceeds the opening of the recessed hole.

[0008] In some embodiments, there are multiple recessed holes, each of which is evenly distributed along the circumference of the inertia disk, and there are multiple inertia blocks, each of which is respectively disposed in each of the recessed holes.

[0009] In some embodiments, a rotor and a front bearing are also mounted on the rotating shaft, and the inertia adjustment assembly is located between the rotor and the front bearing.

[0010] In some embodiments, the rotating shaft is further provided with a fan blade, and the rotor is located between the fan blade and the inertia adjustment component.

[0011] In some embodiments, a first stop boss is formed on the rotating shaft, and a groove is also constructed on the rotating shaft. The first stop boss is located between the groove and the rotor. A stop member is provided in the groove, and the fan blade is clamped between the stop member and the first stop boss.

[0012] In some embodiments, there are multiple grooves, and the grooves are spaced apart along the axial direction of the rotating shaft.

[0013] The present invention also provides a rotating device, comprising the above-mentioned rotor structure.

[0014] The present invention provides a rotor structure and a rotating device having the same, which has the following beneficial effects: Since the inertia disc is mounted on the rotating shaft, the rotating shaft will drive the inertia disc to rotate synchronously under working conditions. When the rotor structure is impacted and the rotation speed of the inertia disc changes, the inertia block slides along the concave hole under the action of centrifugal force, causing the rotational inertia of the inertia adjustment component to change, so that the rotor structure can adaptively adjust its own rotational inertia according to the rotational speed of different mechanical operations, and then dynamically respond to solve the unbalanced working conditions encountered during operation, so that the rotor structure has a certain range of adaptive stability and impact resistance characteristics, and achieves smooth operation. The smooth operation of the rotor structure reduces mechanical vibration and noise, while reducing the mutual wear between the rotating shaft and bearings and other components, and extending the service life of the rotor structure. Furthermore, since the rotor structure can automatically adjust its own rotational inertia according to the rotational speed, it can also adapt to working conditions under different powers and speeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] Figure 1 is a schematic diagram of a rotor structure according to an embodiment of the present invention; Figure 2 is a schematic diagram of a rotating shaft of a rotor structure according to an embodiment of the present invention; Figure 3It is a schematic diagram of the inertia adjustment component of the rotor structure of an embodiment of the present invention when it is in a non-working state; Figure 4 It is a schematic diagram of the inertia adjustment component of the rotor structure of an embodiment of the present invention when it is in a working state; Figure 5 A side view of an inertia disk of an inertia adjustment assembly of a rotor structure according to an embodiment of the present invention; Figure 6 A cross-sectional view of a fan blade of a rotor structure according to an embodiment of the present invention; Figure 7 A front view of a fan blade of a rotor structure according to an embodiment of the present invention; Figure 8 A side view of a rotor of a rotor structure according to an embodiment of the present invention; Fig. 9 It is a front view of a rotor of a rotor structure according to an embodiment of the present invention.

[0017] The reference numerals are: 1. Rotating shaft; 2. Inertia adjustment assembly; 21. Inertia disk; 22. Inertia block; 23. Elastic member; 3. Concave hole; 4. Rotor; 5. Fan blade; 6. First stop boss; 7. Groove; 8. Stop member; 9. Fan blade inner key; 10. Second stop boss; 11. Nut; 12. Inertia disk keyway; 13. Rotor baffle; 14. Rotor inner key; 15. First keyway; 16. Second keyway; 17. Third keyway; 18. Fixed key. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0020] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0021] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0022] See also Figures 1 to 9 As shown, according to an embodiment of the present invention, a rotor structure is provided, comprising a rotating shaft 1 and an inertia adjustment assembly 2, wherein the inertia adjustment assembly 2 comprises an inertia disc 21 and an inertia block 22, wherein the inertia disc 21 is mounted on the rotating shaft 1, and a concave hole 3 extending radially along the rotating shaft 1 is configured on the outer circumferential surface of the inertia disc 21, and the inertia block 22 is slidably disposed in the concave hole 3. When the rotating shaft 1 is in a rotating state, the inertia block 22 slides along the concave hole 3 under the action of centrifugal force to adjust the rotational inertia of the rotor structure.

[0023] In this technical solution, since the inertia disc 21 is mounted on the rotating shaft 1, the rotating shaft 1 will drive the inertia disc 21 to rotate synchronously in the working state. When the rotor structure is impacted and the rotation speed of the inertia disc 21 changes, the inertia block 22 slides along the concave hole 3 under the action of centrifugal force to change the rotational inertia of the inertia adjustment component 2, so that the rotor structure can adaptively adjust its own rotational inertia according to the rotation speed of different mechanical operations, and then dynamically respond to solve the unbalanced working conditions encountered during operation, so that the rotor structure has a certain range of adaptive stability and impact resistance characteristics, and realizes stable operation. The stable operation of the rotor structure reduces mechanical vibration and noise, and at the same time reduces the mutual wear between the rotating shaft 1 and the bearing and other components, and prolongs the service life of the rotor structure. Furthermore, since the rotor structure can automatically adjust its own rotational inertia according to the rotation speed, it can also adapt to working conditions under different powers and speeds.

[0024] See also Figure 3As shown, the inertia adjustment assembly 2 also includes an elastic member 23 , which is located between the bottom of the recessed hole 3 and the inertia block 22 , and one end of the elastic member 23 is connected to the hole wall of the recessed hole 3 , and the other end of the elastic member 23 is connected to the inertia block 22 .

[0025] In this embodiment, when the rotor structure stops working, the shaft 1 will be in a stationary state, and the inertia disc 21 will also be in a stationary state synchronously, then the centrifugal force on the inertia block 22 disappears, and the inertia block 22 needs to be restored to its initial state. After the elastic member 23 is provided, the inertia block 22 can automatically reset after the centrifugal force disappears, so that the inertia block 22 can work normally when the rotor structure is started next time.

[0026] As a specific implementation manner, the elastic member 23 is made of a magnetic material, the inertia disk 21 is made of a magnetic conductive material, and the elastic member 23 is magnetically connected to the inertia disk 21; and / or, the elastic member 23 is made of a magnetic material, the inertia block 22 is made of a magnetic conductive material, and the elastic member 23 is magnetically connected to the inertia block 22.

[0027] In this technical solution, when the elastic member 23 is made of magnetic material, and the inertia disc 21 and the inertia block 22 are both made of magnetic conductive material, one end of the elastic member 23 only needs to contact the hole wall of the recessed hole 3, and the other end of the elastic member 23 only needs to contact the inertia block 22, and the two ends of the elastic member 23 can be connected to the inertia disc 21 and the inertia block 22 respectively by magnetic attraction. The use of such magnetic attraction contact connection makes the connection between the inertia disc 21, the elastic member 23, and the inertia block 22 simpler, and also facilitates disassembly and assembly. It can be understood that by reasonably selecting and designing the inertia block 22 and the elastic member 23, the magnetic attraction between the inertia block 22 and the elastic member 23 is greater than the centrifugal force on the inertia block 22 at the maximum speed, so that the inertia block 22 can be prevented from detaching from the elastic member 23 during operation. It should be noted that the elastic member 23 can be a spring made of magnetic material, and the inertia disc 21 and the inertia block 22 can be made of metal magnetic conductive material.

[0028] See also Figure 3 As shown, when the inertia block 22 is in the initial state, the end of the inertia block 22 away from the bottom of the concave hole 3 is flush with the opening of the concave hole 3 or exceeds the opening of the concave hole 3. This is equivalent to the inertia block 22 blocking the opening of the concave hole 3 in the initial state, thereby preventing solid particles and other impurities from entering the concave hole 3 during actual installation and affecting the normal extension of the inertia block 22 under the action of centrifugal force. Among them, the inertia block 22 can be either a cylindrical structure or a rectangular parallelepiped structure, and the shape of the concave hole 3 matches the shape of the inertia block 22. Among them, the initial state of the inertia block 22 is also the non-working state of the inertia block 22.

[0029] See also Figure 3 and Figure 4As shown, there are multiple recessed holes 3 , each recessed hole 3 is evenly distributed along the circumference of the inertia disc 21 , and there are multiple inertia blocks 22 , each inertia block 22 is respectively disposed in each recessed hole 3 .

[0030] In this embodiment, the uniform distribution of the concave holes 3 along the circumference of the inertia disc 21 is equivalent to the uniform distribution of the inertia blocks 22 arranged in the concave holes 3 on the inertia disc 21, which makes the inertia adjustment component 2 composed of the inertia disc 21 and the inertia blocks 22 a structure with uniform texture as a whole, and the inertia adjustment component 2 will not affect the stable and balanced operation of the rotor structure. At the same time, when the rotor structure is impacted in the working state, the rotational inertia of the inertia adjustment component 2 also changes uniformly, which enables the rotor structure to achieve more stable operation.

[0031] The principle of changing the moment of inertia of the inertia adjustment component 2 is as follows: the inertia disc 21 has a uniform texture and a weight of M. The speed of the inertia disc 21 in the working state is N. The inertia blocks 22 have a uniform texture and a mass of m. The number of blocks is n. The diameter of the circular surface formed by the position of the center of mass relative to the center of the inertia disc 21 is D. t ; The spring constant of the elastic member 23 is k; The friction force between the surface of the inertia block 22 and the inner surface of the inertia disk 21 is f (when the inertia block is separated from the inertia disk, the friction force is 0 N). Therefore, the total inertia of the inertia disk system is: … <1> , the force equation of the inertia block is: … <2> ,Depend on <1> <2> It can be seen from the formula that when the speed of the inertia disc 21 changes, the inertia block 22 can change its own rotation radius to adapt to different rotational inertia, and the speed of the inertia disc 21 is consistent with the speed of the rotating shaft 1. Therefore, the inertia disc 21 can provide reasonable corresponding rotational inertia at different speeds, so that the rotor structure can have a certain range of adaptive stability and impact resistance when encountering unbalanced conditions during operation, so that the equipment can operate safely, reliably, and stably in dynamic balance.

[0032] Figure 3 The figure shows a schematic diagram of the inertia adjustment component of the rotor structure of the embodiment of the present invention when it is in a non-working state. Figure 3 It can be seen that the inner diameter of the inertia disc 21 is d, the outer diameter of the inertia disc 21 is D, and when the inertia disc 21 is in a stationary state, the bottom of the inertia block 22 is on a circular surface with a diameter of D1. Figure 4 The figure shows a schematic diagram of the inertia adjustment component of the rotor structure of the embodiment of the present invention when it is in working state. Figure 4It can be seen that in the working state, the elastic member 23 is in a stretched state, the bottom of the inertia block 22 is on a circular surface with a diameter of D2, and the top of the inertia block 22 is on a circular surface with a diameter of D3, wherein D3>D2>D1, thus also proving through experiments that the inertia block 22 adjusts the rotational inertia of the rotor structure by changing its own rotation radius.

[0033] See also Figure 1 As shown, the rotating shaft 1 is also provided with a rotor 4 and a front bearing (not shown in the figure), and the inertia adjustment assembly 2 is located between the rotor 4 and the front bearing.

[0034] In this technical solution, when the inertia adjustment component 2 is arranged between the rotor 4 and the front bearing, it is beneficial to reduce the deflection of the shaft 1 and improve the stability of the shaft 1. At the same time, when the rotor structure is impacted, the impact force will be transmitted from the front end of the shaft 1 to the rear. When the inertia adjustment component 2 is arranged between the rotor 4 and the front bearing, it is also beneficial for the inertia adjustment component 2 to respond quickly to inertia adjustment.

[0035] See also Figure 1 As shown, the rotating shaft 1 is also provided with a fan blade 5 , and the rotor 4 is located between the fan blade 5 and the inertia adjustment component 2 .

[0036] In this embodiment, when the rotor structure is working, the rotating shaft 1 drives the fan blades 5 to rotate synchronously, so that the fan blades 5 drive the airflow to cool the rotor 4.

[0037] See also Figure 1 and Figure 2 As shown, a first stop boss 6 is formed on the rotating shaft 1 , and a groove 7 is also constructed on the rotating shaft 1 . The first stop boss 6 is located between the groove 7 and the rotor 4 . A stop member 8 is arranged in the groove 7 , and the fan blade 5 is clamped between the stop member 8 and the first stop boss 6 .

[0038] In this technical solution, a blade inner key 9 is provided on the radial inner side of the fan blade 5, and a first keyway 15 is constructed on the rotating shaft 1. The blade inner key 9 is inserted along the first keyway 15 so that the blade inner key 9 and the first keyway 15 form a keyway match, thereby circumferentially fixing the fan blade 5 on the rotating shaft 1. After the fan blade 5 abuts against the first stop boss 6, a stopper 8 is provided in the groove 7, so that the stopper 8 and the first stop boss 6 clamp the fan blade 5 from both sides, thereby axially fixing the fan blade 5 on the rotating shaft 1, and finally fixing the fan blade 5 on the rotating shaft 1. Among them, the side of the first stop boss 6 that contacts the fan blade 5 is rounded, and its function is to eliminate stress, reduce wear during assembly, and prevent the increase of additional bearing capacity. Preferably, the groove 7 is an annular groove surrounding the rotating shaft 1, and the stopper 8 is an elastic retaining ring, which is inserted into the annular groove to form a stop for the fan blade 5.

[0039] See also Figure 1 and Figure 2 As shown, there are multiple grooves 7 , and the grooves 7 are distributed at intervals along the axial direction of the rotating shaft 1 .

[0040] In this embodiment, when a plurality of grooves 7 located at different positions are constructed on the rotating shaft 1, the elastic retaining ring can be selectively inserted into different grooves 7. Since the thickness of different types of fan blades 5 is different, the elastic retaining ring inserted into different grooves 7 can form a stop for different types of fan blades 5, so that different types of fan blades 5 can be fixedly assembled on the rotating shaft 1, and then the rotor structure can adapt to a variety of fan blades 5 according to the heat dissipation requirements, which expands its application range and is of great significance for improving equipment performance and adapting to various working conditions. The grooves 7 on the rotating shaft 1 are all standardized universal designs. The standardized groove 7 design simplifies the installation and replacement process of the fan blades 5, reduces maintenance costs and time, and makes the fan blades 5 easy to install and maintain.

[0041] It should be noted that, for fixing the inertia disc 21 on the rotating shaft 1, an inertia disc keyway 12 is constructed on the radial inner side of the inertia disc 21, a second keyway 16 is also constructed on the rotating shaft 1, and a second stop boss 10 is also formed on the rotating shaft 1. When the inertia disc 21 is sleeved on the rotating shaft 1, the fixing key 18 is simultaneously in the inertia disc keyway 12 and the second keyway 16 to form a keyway match to fix the inertia disc 21 circumferentially on the rotating shaft 1. At the same time, the inertia disc 21 abuts against the second stop boss 10, and the nut 11 is threadedly connected on the rotating shaft 1, so that the nut 11 and the second stop boss 10 clamp the inertia disc 21 from both sides to axially fix the inertia disc 21 on the rotating shaft 1, and finally fix the inertia disc 21 on the rotating shaft 1. In order to prevent the nut 11 from wearing the inertia disc 21, a stop washer is also arranged between the nut 11 and the inertia disc 21. The side of the second stop boss 10 in contact with the inertia disc 21 is rounded to eliminate stress, reduce wear during assembly, and prevent additional load. Further, the inertia disc 21 and the rotating shaft 1 can also be permanently fixed by spot welding.

[0042] It should also be noted that the rotor core is locked and fixed to form a rotor 4 by riveting and pressing process and using the rotor baffles 13 on both sides. For the fixation of the rotor 4 on the rotating shaft 1, a rotor inner key 14 is provided on the radial inner side of the rotor core, and a third keyway 17 is configured on the rotating shaft 1. The rotor inner key 14 on the rotor core is inserted into the third keyway 17 on the rotating shaft 1 to form a keyway fit, so as to achieve circumferential fixation of the rotor 4. The rotor core and the rotating shaft 1 are interference fit, so as to achieve axial fixation of the rotor 4, and finally the rotor 4 is fixed on the rotating shaft 1.

[0043] The present invention also provides a rotating device, comprising the aforementioned rotor structure, and the rotating device may be a motor, a turbine, etc.

[0044] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A rotor structure, characterized in that: The invention comprises a rotating shaft (1) and an inertia adjustment component (2), wherein the inertia adjustment component (2) comprises an inertia disc (21) and an inertia block (22), wherein the inertia disc (21) is mounted on the rotating shaft (1), wherein a concave hole (3) extending radially of the rotating shaft (1) is formed on the outer peripheral surface of the inertia disc (21), and wherein the inertia block (22) is slidably arranged in the concave hole (3), and when the rotating shaft (1) is in a rotating state, the inertia block (22) slides along the concave hole (3) under the action of centrifugal force to adjust the rotational inertia of the rotor structure.

2. The rotor structure according to claim 1, characterized in that: The inertia adjustment component (2) further comprises an elastic member (23), the elastic member (23) being located between the bottom of the recessed hole (3) and the inertia block (22), one end of the elastic member (23) being connected to the hole wall of the recessed hole (3), and the other end of the elastic member (23) being connected to the inertia block (22).

3. The rotor structure according to claim 2, characterized in that: The elastic member (23) is made of a magnetic material, the inertia disk (21) is made of a magnetic conductive material, and the elastic member (23) is magnetically connected to the inertia disk (21); and / or the elastic member (23) is made of a magnetic material, the inertia block (22) is made of a magnetic conductive material, and the elastic member (23) is magnetically connected to the inertia block (22).

4. The rotor structure according to any one of claims 1 to 3, characterized in that: When the inertia block (22) is in an initial state, an end of the inertia block (22) facing away from the bottom of the recessed hole (3) is flush with the opening of the recessed hole (3) or exceeds the opening of the recessed hole (3).

5. The rotor structure according to claim 1, characterized in that: The number of the concave holes (3) is multiple, and the concave holes (3) are evenly distributed along the circumference of the inertia disk (21). The number of the inertia blocks (22) is also multiple, and the inertia blocks (22) are respectively arranged in the concave holes (3).

6. The rotor structure according to claim 1, characterized in that: The rotating shaft (1) is also provided with a rotor (4) and a front bearing, and the inertia adjustment component (2) is located between the rotor (4) and the front bearing.

7. The rotor structure according to claim 6, characterized in that: The rotating shaft (1) is also provided with a fan blade (5), and the rotor (4) is located between the fan blade (5) and the inertia adjustment component (2).

8. The rotor structure according to claim 7, characterized in that: A first stop boss (6) is formed on the rotating shaft (1), and a groove (7) is also formed on the rotating shaft (1); the first stop boss (6) is located between the groove (7) and the rotor (4); a stop member (8) is provided in the groove (7); and the fan blade (5) is clamped between the stop member (8) and the first stop boss (6).

9. The rotor structure according to claim 8, characterized in that: The number of the grooves (7) is plural, and the grooves (7) are distributed at intervals along the axial direction of the rotating shaft (1).

10. A rotating device, characterized in that: A rotor structure comprising any one of claims 1 to 9.

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