Turbine blade capable of preventing metal fatigue

Abstract

The utility model discloses a turbine blade capable of preventing metal fatigue, which comprises a blade, the bottom of one side of the blade is fixedly connected with a connecting seat, one side of the connecting seat is fixedly connected with a fixed seat, the front side and the rear side of the fixed seat are rotatably connected with pinch plates through rotating shafts, one side of each pinch plate is provided with a first fixing bolt, and the other side of each pinch plate is provided with a second fixing bolt. A mounting plate is mounted on one side of the fixing seat, one side of the mounting plate is fixedly connected with one side of a buckle plate through two first fixing bolts, a damper is mounted on the other side of the fixing seat, a connecting plate is fixedly connected to the other end of the damper, and a gear is arranged at one end of the damper. The turbine blade capable of preventing metal fatigue is provided with the damper, the damper can utilize centrifugal force and friction force to consume vibration energy generated when the turbine blade is used, the reliability of the blade can be improved, and the problem of metal fatigue of the blade is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbine blades, in particular to a turbine blade that is resistant to metal fatigue. Background Art

[0002] Patent application publication number CN217558391U describes a turbine blade assembly comprising a central disk and multiple blades arranged in an axial array around the disk's periphery. The central portions of both sides of the central disk each feature a protruding shaft integrally formed with the disk. This integral formation of the central disk and the protruding shaft addresses the issues of conventional turbine blade-shaft connections, such as low strength, metal fatigue-induced shaft wear and breakage, poor precision, and poor strength.

[0003] In the prior art including the above-mentioned patents, the blades are subject to resonance, surge and flutter caused by forced vibration or self-excited vibration at a specific rotational speed. This continuous vibration and scouring will cause fatigue of the metal structure. There is a lack of shock-absorbing protection for the blades, and the shock-absorbing effect is not ideal, which may cause the blades to break or be damaged. At the same time, if the integrated turbine blades are damaged after long-term use, the damaged parts cannot be replaced separately, and the entire blade needs to be replaced, which has a high maintenance cost. Utility Model Content

[0004] The purpose of the utility model is to provide a turbine blade that is resistant to metal fatigue, so as to solve the problem of unsatisfactory vibration reduction effect of the turbine blade proposed in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a turbine blade that is resistant to metal fatigue, comprising a blade, the bottom of one side of the blade is fixedly connected to a connecting seat, one side of the connecting seat is fixedly connected to a fixing seat, the front and rear sides of the fixing seat are rotatably connected to a pinch plate via a rotating shaft, one side of the two pinch plates is provided with a first fixing bolt, one side of the fixing seat is installed with a mounting plate, one side of the mounting plate is fixedly connected to one side of the pinch plate by two first fixing bolts respectively, a damper is installed on the other side of the fixing seat, the other end of the damper is fixedly connected to the connecting plate, one end of the damper is provided with a gear, and a spring is sleeved on the outer wall of the damper, and the damper is used to consume the vibration energy of the blade.

[0006] Furthermore, the bottom end of the blade is fixedly connected to a base, the lower end of the base is fixedly connected to a tenon, and the lower end of the base is provided with a wheel disc.

[0007] Furthermore, a plurality of tenons are equidistantly provided on the outer wall of the wheel disc, the tenons are matched with the tenons, and the blades are fixed to the periphery of the wheel disc through the cooperation between the tenons and the tenons.

[0008] Furthermore, the front and back sides of the wheel disc are both provided with fixing plates adapted to the mortise and tenon grooves, and one side of the fixing plate is plugged and fixed to one side of the wheel disc through the mortise and tenon grooves.

[0009] Furthermore, the fixing plate is provided with a plurality of second fixing bolts, and the fixing plate is fixedly mounted on the front and back sides of the wheel disc using the second fixing bolts.

[0010] Furthermore, a shaft body for auxiliary fixation is provided at the axis of the fixing plate and the wheel disc.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the turbine blade that prevents metal fatigue is reasonable and has the following advantages:

[0012] The utility model provides a damper between the edge plate and the deep root of the blade. The damper can use centrifugal force and friction to consume the vibration energy generated by the turbine blade during use. Turbine blades usually operate in extreme environments of high temperature and high pressure. The blades are subject to resonance, surge and flutter caused by forced vibration or self-excited vibration at a specific speed, thereby subjecting the blades to the effects of alternating vibration loads. This continuous vibration and scouring can cause fatigue of the metal structure and eventually lead to fracture or damage. Metal fatigue of the blades is the main cause of engine failure. Strong vibration or resonance may cause metal fatigue. The utility model can increase the reliability of the blades and reduce the occurrence of metal fatigue problems of the blades.

[0013] The utility model is provided with a tenon and a tenon groove, and the blade is installed on the wheel disc through the cooperation of the tenon and the tenon groove, and is doubly fixed by using a fixing plate and a first fixing bolt, so as to maintain the stability of the blade during use, and to facilitate the replacement and disassembly of the blade damaged after long-term use. When damaged, there is no need to replace the entire blade, thereby reducing the cost of use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the connecting seat of the utility model;

[0016] Figure 3 This is a schematic diagram of the installation of the gusset plate structure of the utility model;

[0017] Figure 4 This is a front view schematic diagram of the damper structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the base structure of the utility model;

[0019] Figure 6 This is an exploded schematic diagram of the wheel structure of the utility model.

[0020] In the figure: 1. fixing plate; 2. blade; 3. wheel disc; 4. connecting seat; 5. buckle plate; 6. mounting plate; 7. connecting plate; 8. fixing seat; 9. gear; 10. first fixing bolt; 11. spring; 12. damper; 13. base; 14. tenon; 15. shaft; 16. mortise and tenon; 17. second fixing bolt. DETAILED DESCRIPTION

[0021] 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-6 , a technical solution provided by the utility model:

[0023] Example 1:

[0024] In this embodiment, a turbine blade for preventing metal fatigue includes a blade 2, the bottom of one side of the blade 2 is fixedly connected to a connecting seat 4, one side of the connecting seat 4 is fixedly connected to a fixing seat 8, the front and rear sides of the fixing seat 8 are rotatably connected to a pinch plate 5 through a rotating shaft, one side of the two pinch plates 5 is provided with a first fixing bolt 10, one side of the fixing seat 8 is installed with a mounting plate 6, one side of the mounting plate 6 and one side of the pinch plate 5 are respectively fixedly connected by two first fixing bolts 10, a damper 12 is installed on the other side of the fixing seat 8, the other end of the damper 12 is fixedly connected to the connecting plate 7, one end of the damper 12 is provided with a gear 9, and a spring 11 is sleeved on the outer wall of the damper 12, and the damper 12 is used to consume the vibration energy of the blade 2. The damper 12 is installed between the edge plate and the deep root of the blade 2, and can use centrifugal force and friction to consume the vibration energy generated by the blade 2 during use, thereby slowing down the problem of metal fatigue of the blade.

[0025] When in use, first install the damper 12 on the base 13 on one side of the blade 2. During installation, align the mounting plate 6 at one end of the damper 12 with the fixing seat 8, then rotate the front and rear side buckle plates 5 so that the inner side of the buckle plates 5 are tightly attached to one side of the fixing seat 8. After aligning the position, use the first fixing bolt 10 to fix the buckle plates 5 and the fixing seat 8.

[0026] Example 2:

[0027] In this embodiment, the bottom end of the blade 2 is fixedly connected to a base 13 , the lower end of the base 13 is fixedly connected to a tenon 14 , and the lower end of the base 13 is provided with a wheel disc 3 .

[0028] In this embodiment, a plurality of tenons 16 are equidistantly provided on the outer wall of the wheel disc 3 , the tenons 14 are matched with the tenons 16 , and the blades 2 are fixed to the periphery of the wheel disc 3 by the cooperation of the tenons 14 and the tenons 16 .

[0029] In this embodiment, the front and back sides of the wheel disc 3 are both provided with fixing plates 1 adapted to the tongue and groove 16 , and one side of the fixing plate 1 is plugged and fixed to one side of the wheel disc 3 through the tongue and groove 16 .

[0030] In this embodiment, the fixing plate 1 is provided with a plurality of second fixing bolts 17, and the fixing plate 1 is fixedly mounted on the front and back sides of the wheel disc 3 using the second fixing bolts 17. The blades 2 are mounted on the wheel disc 3 through the cooperation of the tenon 14 and the tenon groove 16, and the fixing plate 1 and the first fixing bolts 10 are used for double fixation to maintain the stability of the blades 2 during use.

[0031] In this embodiment, a shaft 15 for auxiliary fixation is provided at the axis of the fixing plate 1 and the wheel disc 3 .

[0032] After the damper 12 is fixed, multiple blades 2 are fixed on the wheel disc 3 for use. When fixing the blade 2, first align the tenon 14 at the bottom end of the blade 2 with the tenon 16 on the outer wall of the wheel disc 3. After alignment, insert the tenon 14 into the tenon 16. After insertion, align the two fixing plates 1 with the front and rear tenon 16 on the wheel disc 3 respectively and plug them in. After plugging in, use multiple second fixing bolts 17 to fix and install the fixing plates 1 and the wheel disc 3. After all the blades 2 are fixed in turn, they can be put into use.

[0033] Working principle: When in use, first install the damper 12 on the base 13 on one side of the blade 2. During installation, align the mounting plate 6 at one end of the damper 12 with the fixing seat 8, and then rotate the front and rear side gussets 5 so that the inner side of the gusset plates 5 are close to one side of the fixing seat 8. After aligning the position, use the first fixing bolt 10 to fix the gusset plates 5 and the fixing seat 8. After the damper 12 is fixed, multiple blades 2 are fixed on the wheel disc 3 for use. When fixing the blade 2, first align the tenon 14 at the bottom end of the blade 2 with the tenon 16 on the outer wall of the wheel disc 3. After alignment, insert the tenon 14 into the tenon 16. After insertion, align the two fixing plates 1 with the front and rear side tenons 16 on the wheel disc 3 and plug them in. After plugging in, use multiple second fixing bolts 17 to fix the fixing plate 1 and the wheel disc 3. After all the blades 2 are fixed in turn, you can start using it.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A turbine blade for preventing metal fatigue, comprising a blade (2), characterized in that: The bottom of one side of the blade (2) is fixedly connected to a connecting seat (4), one side of the connecting seat (4) is fixedly connected to a fixing seat (8), the front and rear sides of the fixing seat (8) are rotatably connected to a pinch plate (5) through a rotating shaft, one side of the two pinch plates (5) is provided with a first fixing bolt (10), one side of the fixing seat (8) is installed with a mounting plate (6), one side of the mounting plate (6) and one side of the pinch plate (5) are fixedly connected by two first fixing bolts (10), a damper (12) is installed on the other side of the fixing seat (8), the other end of the damper (12) is fixedly connected to the connecting plate (7), one end of the damper (12) is provided with a gear (9), the outer wall of the damper (12) is provided with a spring (11), and the damper (12) is used to consume the vibration energy of the blade (2).

2. The metal fatigue-resistant turbine blade according to claim 1, characterized in that: The bottom end of the blade (2) is fixedly connected to a base (13), the lower end of the base (13) is fixedly connected to a tenon (14), and the lower end of the base (13) is provided with a wheel disc (3).

3. The metal fatigue-resistant turbine blade according to claim 2, characterized in that: A plurality of mortises (16) are equidistantly provided on the outer wall of the wheel disc (3), the tenons (14) are matched with the mortises (16), and the blades (2) are fixed around the wheel disc (3) through the matching of the tenons (14) and the mortises (16).

4. The metal fatigue-resistant turbine blade according to claim 3, characterized in that: The front and back sides of the wheel disc (3) are both provided with fixing plates (1) adapted to the tongue and groove (16), and one side of the fixing plate (1) is plugged and fixed to one side of the wheel disc (3) through the tongue and groove (16).

5. The metal fatigue-resistant turbine blade according to claim 4, characterized in that: The fixing plate (1) is provided with a plurality of second fixing bolts (17), and the fixing plate (1) is fixedly mounted on the front and back sides of the wheel disc (3) using the second fixing bolts (17).

6. The metal fatigue-resistant turbine blade according to claim 5, characterized in that: A shaft body (15) for auxiliary fixing is provided at the axis center of the fixing plate (1) and the wheel disc (3).

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