A steam turbine blade fatigue test device

Abstract

The present invention discloses a turbine blade fatigue test device, which includes a detection component, including a pressure fan blade and a vibrator, wherein the pressure fan blade faces one end of the impeller, and the vibrator fits the impeller blade; and an assembly component, which is arranged on both sides of the impeller, including a bracket and a drive, wherein the drive is arranged at one end of the top of the bracket, and the impeller is arranged at the other end of the top of the bracket. The present invention can relatively comprehensively complete the detection of the fatigue of the impeller surface, quickly and stably assemble the turbine blade, and during the detection process, the corresponding position of the vibrator and the blade can be flexibly adjusted according to different time periods, and the detection is relatively comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine blade detection, in particular to a steam turbine blade fatigue test device. Background Art

[0002] Steam turbine is a kind of power mechanical equipment, which is used in some power plants, chemical industry or ship power plants. The quality of steam turbine blades directly affects the power transmission effect of steam turbine operation. During the production and processing of blades, fatigue test can be used to detect the quality of blades.

[0003] However, some existing turbine blade fatigue testing instruments are not convenient for quickly determining the position of the blades when in use. The turbine blades have a large structure and a large gravity, and their assembly stability with the testing instrument is limited. The assembly stability affects the axial power output test effect. In addition, existing fatigue testing instruments are not convenient for adjusting the corresponding position of the test structure and the blades when in use, and the test range is relatively limited.

[0004] Therefore, it is necessary to design a turbine blade fatigue testing instrument to address the above problems. Summary of the invention

[0005] In view of the above problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is how to stably and diversely test the fatigue of steam turbine blades.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a turbine blade fatigue testing device, which includes a detection component and an assembly component.

[0008] As a preferred solution of the turbine blade fatigue test device of the present invention, the detection component includes a pressure blade and a vibrator, the pressure blade is directly facing one end of the impeller, and the vibrator is in contact with the impeller blade;

[0009] The assembly components are arranged on both sides of the impeller, and include a bracket and a drive, wherein the drive is arranged at one end of the top of the bracket, and the impeller is arranged at the other end of the top of the bracket.

[0010] As a preferred solution of the turbine blade fatigue testing device described in the present invention, the assembly component also includes a transmission disc and a transmission shaft, the transmission disc is sleeved on the end of the top of the bracket away from the drive, and there are two transmission shafts, which are matched with the two ends of the impeller axis.

[0011] As a preferred solution of the turbine blade fatigue testing device of the present invention, the detection component further includes a gear ring and a flat gear, the gear ring is sleeved on the outside of the transmission plate, and the flat gear is arranged to mesh with the gear ring.

[0012] As a preferred solution of the turbine blade fatigue testing device described in the present invention, the detection component also includes a pressure wind shaft, the pressure wind blade and the plane gear are connected through the pressure wind shaft, and the pressure wind shaft is rotatably connected to the top of one side of the bracket.

[0013] As a preferred solution of the turbine blade fatigue testing device described in the present invention, the transmission shaft is provided with an embedded groove and a linear sliding hole, the embedded groove is arranged inside the transmission shaft and is coaxial with the transmission shaft, and the linear sliding hole is symmetrically arranged on both sides of the transmission shaft.

[0014] As a preferred solution of the turbine blade fatigue testing device described in the present invention, the transmission shaft also includes a telescopic rod and a gear plate, the telescopic rod is arranged inside the embedded groove, and the gear plate is arranged at one end of the telescopic rod close to the notch of the embedded groove and protrudes from the notch of the embedded groove.

[0015] As a preferred solution of the turbine blade fatigue testing device described in the present invention, wherein: tooth grooves are provided at both ends of the impeller axis, and the toothed disc cooperates with the impeller through the tooth grooves; the drive and transmission shafts cooperate, and the transmission disc cooperates with the transmission shaft; and the two ends of the impeller axis cooperate with the transmission shaft.

[0016] As a preferred solution of the turbine blade fatigue test device of the present invention, the detection assembly further comprises a guide rod and a fixing ring, wherein the guide rod is symmetrically arranged about the axis of the embedded groove, one end of the guide rod passes through the linear sliding hole and is fixedly connected to the fixing ring, and the other end is arranged in the embedded groove and is fixedly connected to the toothed disc;

[0017] The fixed ring includes an inner ring, a middle ring, an outer ring and a connecting ring shaft; the inner ring is fixedly connected to the guide rod, one end of the connecting ring shaft is fixedly connected to the outer wall of the inner ring, the middle part passes through and is fixedly connected to the middle ring, and the other end is fixedly connected to the inner wall of the outer ring.

[0018] As a preferred solution of the turbine blade fatigue testing device described in the present invention, wherein: the detection component also includes a sliding rod, which is arranged between the middle ring and the outer ring, the sliding rod includes a control support rod, a sliding ball and a square sliding sleeve, the fixed ring also includes an arc surface sliding groove, the arc surface sliding groove is arranged on the outer wall of the middle ring, the sliding ball is arranged at one end of the control support rod and slidably cooperates with the arc surface sliding groove, and the square sliding sleeve is arranged at the other end of the control support rod and is sleeved on the outer ring.

[0019] As a preferred solution of the turbine blade fatigue testing device of the present invention, the detection component also includes a smooth sleeve, which is sleeved on the outside of the control support rod and cooperates with the vibrator, and the vibrator is facing the impeller.

[0020] The beneficial effects of the present invention are: it can complete the fatigue detection of the impeller surface more comprehensively, quickly and stably assemble the turbine blades, and during the detection process, the corresponding positions of the vibrator and the blades can be flexibly adjusted according to different time periods, so that the detection is more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0022] Figure 1 This is the main structural diagram of the turbine blade fatigue test device.

[0023] Figure 2 This is the overall structure diagram of the turbine blade fatigue test device.

[0024] Figure 3 This is the structural diagram of the drive disc end of the turbine blade fatigue test device.

[0025] Figure 4 This is the impeller end structure diagram of the turbine blade fatigue test device.

[0026] Figure 5 This is a cross-sectional structural diagram of the transmission shaft of the turbine blade fatigue testing device.

[0027] Figure 6 This is a structural diagram of the detection components of the turbine blade fatigue test device.

[0028] Figure 7 This is the structural diagram of the sliding rod of the turbine blade fatigue test device. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides a turbine blade fatigue testing device, and the turbine blade fatigue testing device includes.

[0033] Specifically, the detection assembly 100 includes a pressure fan blade 101 and a vibrator 102, wherein the pressure fan blade 101 is directly opposite to one end of the impeller Y, and the vibrator 102 is attached to the blade of the impeller Y;

[0034] The pressure fan blade 101 generates wind pressure to act on the surface of the impeller Y to assist in testing the fatigue of the impeller Y. At the same time, the vibrator 102 also acts on the impeller surface to assist in testing the fatigue of the blades through vibration.

[0035] The assembly component 200 is arranged on both sides of the impeller Y, and includes a bracket 201 and a driver 202. The driver 202 is arranged at one end of the top of the bracket 201, and the impeller Y is arranged at the other end of the top of the bracket 201.

[0036] Specifically, the assembly component 200 also includes a transmission disc 203 and a transmission shaft 204. The transmission disc 203 is sleeved on one end of the top of the bracket 201 away from the driver 202. There are two transmission shafts 204, which are matched with both ends of the impeller Y axis.

[0037] The top of the bracket 201 is divided into three parts, with an impeller Y placed in the middle. One end of the impeller Y is connected to the driver 202 via a transmission shaft 204 , and the other end of the impeller Y is connected to the transmission plate 203 via a transmission shaft 204 .

[0038] When in use, the drive 202 outputs rotation, driving the impeller Y and the transmission disk 203 to rotate through the transmission shaft 204. The rotation of the impeller Y is used to assist in testing the fatigue of the blades, and the rotation of the transmission disk 203 is used to drive the pressure fan blade 101 to also assist in testing the fatigue of the blades.

[0039] Example 2, reference Figures 1 to 4 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0040] Specifically, the detection assembly 100 further includes a gear ring 103 and a flat gear 104 . The gear ring 103 is sleeved on the outside of the transmission plate 203 , and the flat gear 104 is meshed with the gear ring 103 .

[0041] The drive 202 outputs rotation, driving the impeller Y and the transmission disc 203 to rotate through the transmission shaft 204 , and the gear ring 103 rotates along with the transmission disc 203 , driving the plane gear 104 to rotate.

[0042] Specifically, the detection component 100 further includes a pressure wind shaft 105 , the pressure wind blade 101 and the plane gear 104 are connected via the pressure wind shaft 105 , and the pressure wind shaft 105 is rotatably connected to the top of one side of the bracket 201 .

[0043] The plane gear 104 rotates through the pressure wind shaft 105 to drive the pressure wind blade 101 to rotate, generating wind pressure on the impeller Y to assist in testing fatigue.

[0044] Specifically, the transmission shaft 204 is provided with an embedded groove 204 a and a linear sliding hole 204 b . The embedded groove 204 a is arranged inside the transmission shaft 204 and is coaxial with the transmission shaft 204 . The linear sliding holes 204 b are symmetrically arranged on both sides of the transmission shaft 204 .

[0045] The embedded groove 204a is used to install the telescopic rod 204c.

[0046] Specifically, the transmission shaft 204 further includes a telescopic rod 204c and a toothed disc 204d. The telescopic rod 204c is disposed inside the embedded groove 204a. The toothed disc 204d is disposed at one end of the telescopic rod 204c close to the notch of the embedded groove 204a and protrudes from the notch of the embedded groove 204a.

[0047] Specifically, tooth grooves Y1 are provided at both ends of the impeller Y axis, and the toothed disc 204d cooperates with the impeller Y through the tooth grooves Y1; the drive 202 cooperates with the transmission shaft 204, and the transmission disc 203 cooperates with the transmission shaft 204; and the two ends of the impeller Y axis cooperate with the transmission shaft 204.

[0048] The toothed disc 204d is engaged with the left and right sides of the impeller Y through the tooth groove Y1. The left and right engaging structures can quickly control the impeller Y to be stably assembled on the side of the transmission shaft 204, thereby improving the efficiency of the fatigue test of the impeller Y.

[0049] When in use, the two ends of the impeller Y are fixed by the toothed disc 204d and the tooth groove Y1, thereby ensuring the stability of the device and improving the efficiency of the impeller Y fatigue test.

[0050] Example 3, reference Figures 1 to 7 , which is the third embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0051] Specifically, the detection assembly 100 further includes a guide rod 106 and a fixing ring 107. The guide rod 106 is symmetrically arranged about the axis of the embedded groove 204a. One end of the guide rod 106 passes through the linear sliding hole 204b and is fixedly connected to the fixing ring 107, and the other end is arranged in the embedded groove 204a and is fixedly connected to the toothed disc 204d.

[0052] The fixed ring 107 includes an inner ring 107a, a middle ring 107b, an outer ring 107c and a connecting ring shaft 107d; the inner ring 107a is fixedly connected to the guide rod 106, one end of the connecting ring shaft 107d is fixedly connected to the outer wall of the inner ring 107a, the middle part passes through and is fixedly connected to the middle ring 107b, and the other end is fixedly connected to the inner wall of the outer ring 107c.

[0053] The guide rod 106 cooperates with the linear sliding hole 204 b to allow the fixing ring 107 to move along the transmission shaft 204 , making it convenient for the vibrator 102 to fit the blades of the impeller Y, thereby testing the blade surfaces of the impeller Y at different depths through the vibrator 102 .

[0054] Specifically, the detection component 100 also includes a sliding rod 108, which is arranged between the middle circle 107b and the outer circle 107c. The sliding rod 108 includes a control support rod 108a, a sliding ball 108b and a square sliding sleeve 108c. The fixed ring 107 also includes an arcuate sliding groove 107e. The arcuate sliding groove 107e is arranged on the outer wall of the middle circle 107b. The sliding ball 108b is arranged at one end of the control support rod 108a and slides with the arcuate sliding groove 107e. The square sliding sleeve 108c is arranged at the other end of the control support rod 108a and is sleeved on the outer circle 107c.

[0055] The sliding rod 108 can slide between the middle ring 107b and the outer ring 107c to facilitate side viewing of different blades.

[0056] Specifically, the detection assembly 100 also includes a smooth sleeve 109, which is sleeved on the outside of the control support rod 108a and cooperates with the vibrator 102, and the vibrator 102 is facing the impeller Y.

[0057] The smooth sleeve 109 can change the position of the vibrator 102 on the guide rod 106 and move along the radial direction of the impeller Y.

[0058] When in use, the cooperation of the guide rod 106, the fixing ring 107, the sliding rod 108 and the smooth sleeve 109 allows the vibrator 102 to move in three directions, ensuring that the vibrator 102 can fit various positions on the blades of the impeller Y, making it convenient to detect blade fatigue.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A steam turbine blade fatigue test device, characterized in that: include, The detection assembly (100) comprises a pressure fan blade (101) and a vibrator (102), wherein the pressure fan blade (101) is directly opposite to one end of the impeller (Y), and the vibrator (102) is in contact with the blade of the impeller (Y); The assembly component (200) is arranged on both sides of the impeller (Y), and comprises a bracket (201) and a drive (202), wherein the drive (202) is arranged at one end of the top of the bracket (201), and the impeller (Y) is arranged at the other end of the top of the bracket (201).

2. The steam turbine blade fatigue testing device according to claim 1, characterized in that: The assembly component (200) further comprises a transmission disc (203) and a transmission shaft (204); the transmission disc (203) is sleeved on an end of the top of the bracket (201) away from the drive (202); and there are two transmission shafts (204) which are matched with the two ends of the axis of the impeller (Y).

3. The steam turbine blade fatigue testing device according to claim 2, characterized in that: The detection assembly (100) further comprises a gear ring (103) and a flat gear (104); the gear ring (103) is sleeved on the outside of the transmission plate (203), and the flat gear (104) is arranged to mesh with the gear ring (103).

4. The steam turbine blade fatigue testing device according to claim 3, characterized in that: The detection assembly (100) further comprises a pressure wind shaft (105), the pressure wind blade (101) and the plane gear (104) are connected via the pressure wind shaft (105), and the pressure wind shaft (105) is rotatably connected to the top of one side of the bracket (201).

5. The steam turbine blade fatigue testing device according to claim 4, characterized in that: The transmission shaft (204) is provided with an embedded groove (204a) and a linear sliding hole (204b); the embedded groove (204a) is arranged inside the transmission shaft (204) and is coaxial with the transmission shaft (204); and the linear sliding hole (204b) is symmetrically arranged on both sides of the transmission shaft (204).

6. The steam turbine blade fatigue testing device according to claim 5, characterized in that: The transmission shaft (204) further comprises a telescopic rod (204c) and a toothed disc (204d), wherein the telescopic rod (204c) is arranged inside the embedded groove (204a), and the toothed disc (204d) is arranged at one end of the telescopic rod (204c) close to the notch of the embedded groove (204a) and protrudes from the notch of the embedded groove (204a).

7. The steam turbine blade fatigue testing device according to claim 6, characterized in that: Tooth grooves (Y1) are provided at both ends of the impeller (Y) axis, and the toothed disc (204d) cooperates with the impeller (Y) through the toothed grooves (Y1); the drive (202) cooperates with the transmission shaft (204), and the transmission disc (203) cooperates with the transmission shaft (204); and both ends of the impeller (Y) axis cooperate with the transmission shaft (204).

8. The steam turbine blade fatigue testing device according to claim 7, characterized in that: The detection assembly (100) further comprises a guide rod (106) and a fixing ring (107), wherein the guide rod (106) is symmetrically arranged about the axis of the embedded groove (204a), one end of the guide rod (106) passes through the linear sliding hole (204b) and is fixedly connected to the fixing ring (107), and the other end is arranged in the embedded groove (204a) and is fixedly connected to the toothed disc (204d); The fixed ring (107) comprises an inner ring (107a), a middle ring (107b), an outer ring (107c) and a connecting ring shaft (107d); the inner ring (107a) and the guide rod (106) are fixedly connected, one end of the connecting ring shaft (107d) is fixedly connected to the outer wall of the inner ring (107a), the middle part passes through and is fixedly connected to the middle ring (107b), and the other end is fixedly connected to the inner wall of the outer ring (107c).

9. The steam turbine blade fatigue testing device according to claim 8, characterized in that: The detection component (100) also includes a sliding rod (108), which is arranged between the middle ring (107b) and the outer ring (107c). The sliding rod (108) includes a control support rod (108a), a sliding ball (108b) and a square sliding sleeve (108c). The fixed ring (107) also includes an arcuate sliding groove (107e). The arcuate sliding groove (107e) is arranged on the outer wall of the middle ring (107b). The sliding ball (108b) is arranged at one end of the control support rod (108a) and slidably cooperates with the arcuate sliding groove (107e). The square sliding sleeve (108c) is arranged at the other end of the control support rod (108a) and is sleeved on the outer ring (107c).

10. The steam turbine blade fatigue testing device according to claim 9, characterized in that: The detection assembly (100) further comprises a smooth sleeve (109) which is sleeved on the outside of the control support rod (108a) and cooperates with the vibrator (102), and the vibrator (102) faces the impeller (Y).

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