Vibration detection apparatus for steam turbine blade

Abstract

A vibration detection apparatus for a steam turbine blade, said apparatus comprising: a detection mechanism (100), comprising a detection platform (101) and a closed housing (102) provided on the detection platform (101), circumferentially distributed blade tip timing sensors (103) being provided on both an inner wall of the detection platform (101) and an inner wall of the closed housing (102); a steam turbine rotor (200), provided on the detection platform (101) and arranged between the detection platform (101) and the closed housing (102); a locking mechanism (300), comprising a support base (301) fixedly arranged on an outer wall of the detection platform (101) and a support shaft (302) fixedly arranged at a top end of the support base (301), an outer wall of the support shaft (302) being rotatably connected to an engagement block (303), and further comprising a counterweight block (304) fixedly arranged on an outer wall of the engagement block (303), a support pad (305) being arranged on the support base (301); and a hoisting mechanism (400). The closed housing (102) can be automatically engaged with the detection platform (101) after hoisting is completed, and a disassembly operation is simple, facilitating removal of the steam turbine rotor.

Description

A vibration detection device for turbine blade TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration detection, in particular to a vibration detection device for turbine blade. BACKGROUND

[0002] The turbine is also called steam turbine engine, which is a kind of rotating machinery taking steam as power and converting the heat energy of steam into mechanical work. It has the advantages of large single machine power, high efficiency and long service life, and is the most widely used prime mover in modern thermal power plants, and is also used in metallurgical industry, chemical industry and ship power device. In the running process, the vibration of the turbine blade should be within a safe range. If it exceeds this range, the turbine blade may be broken due to high stress and fatigue, which may cause serious consequences. Even if it is not broken, abnormal blade vibration will accelerate the wear of the parts and produce excessive noise. Therefore, it is often necessary to detect the vibration of the turbine blade.

[0003] In order to judge the service life and performance of the turbine blade, the turbine rotor is generally tested by a vibration detection device before actual application. The turbine rotor needs to be placed on an experimental table, and the turbine rotor is driven to rotate at high speed by a driving device to simulate the use environment, detect the vibration state of the blade, and judge the service life and performance of the turbine blade.

[0004] During detection, the turbine rotor is placed on the experimental table, and a closed test space is formed by the closed structure and the experimental table. After the turbine rotor is hoisted on the experimental table, the closed structure is hoisted onto the experimental table and connected and fixed with the experimental table. After the experiment is completed, the turbine rotor is taken out, the blade is replaced or the turbine rotor is detected again. The connection between the closed structure and the experimental table is usually connected by bolts. The turbine rotor is taken out, the closed structure is disassembled and hoisted, which needs to consume a lot of time, causing the experimental period to be too long. Therefore, a vibration detection device for turbine blade is provided.

[0005] SUMMARY

[0006] In view of the above or the problem that the turbine rotor is taken out, the closed structure is disassembled and hoisted, which needs to consume a lot of time in the prior art, the present application is provided.

[0007] Therefore, the purpose of the present application is to provide a vibration detection device for turbine blade.

[0008] In order to solve the above technical problems, the present application provides the following technical scheme: a vibration detection device for steam turbine blade, comprising a detection mechanism, which comprises a detection table and a closed shell arranged on the detection table, the inner wall of the detection table and the inner wall of the closed shell are both provided with tip timing sensors which are circumferentially distributed; a steam turbine rotor arranged on the detection table and placed between the detection table and the closed shell; a locking mechanism comprising a support seat fixedly arranged on the outer wall of the detection table, a support shaft fixedly arranged on the top end of the support seat, the outer wall of the support shaft being rotationally connected with a clamping block, a counterweight block fixedly arranged on the outer wall of the clamping block, and a support pad arranged on the support seat; a hoisting mechanism comprising an extrusion piece fixedly arranged on the outer wall of the closed shell and a hoisting assembly fixedly arranged on the outer wall of the extrusion piece; during the process of lowering the closed shell to fit the detection table, the extrusion piece can push the clamping block to deflect, and when the closed shell fits the detection table, the counterweight block presses the clamping block to deflect, and the clamping block clamps and positions the extrusion piece.

[0009] As a preferred scheme of the vibration detection device for steam turbine blade, the top edge of the detection table is fixedly provided with a plurality of uniformly distributed guide columns, and the bottom edge of the closed shell is provided with a plurality of uniformly distributed abutting holes; the outer wall of the guide column is slidingly connected with the inner wall of the abutting hole.

[0010] As a preferred scheme of the vibration detection device for steam turbine blade, one side of the clamping block away from the counterweight block is provided with an arc surface, and the other side of the clamping block close to the support pad is provided with a fitting surface; the extrusion piece comprises an extrusion block fixedly arranged on the outer wall of the closed shell and an abutting arc surface arranged on the side of the extrusion block away from the closed shell.

[0011] As a preferred scheme of the vibration detection device for steam turbine blade, the hoisting assembly comprises a hoisting frame fixedly arranged on the outer wall of the extrusion block and a limiting sleeve fixedly arranged on the top of the hoisting frame, the inner wall of the limiting sleeve is slidingly connected with a buffer piece, and the top end of the buffer piece is fixedly installed with a hoisting head.

[0012] As a preferred scheme of the vibration detection device for steam turbine blade, the buffer piece comprises a sliding rod slidingly arranged on the inner wall of the limiting sleeve and an abutting sleeve fixedly arranged on the bottom end of the sliding rod, the bottom end of the abutting sleeve is fixedly installed with a push disc, and the outer wall of the abutting sleeve and the sliding rod is sleeved with a spring, and the bottom end of the push disc is fixedly installed with a plug rod.

[0013] As a preferred scheme of the vibration detection device for steam turbine blade, the extrusion piece further comprises a through hole arranged on the extrusion block; and the clamping block is provided with a slot.

[0014] As a preferred scheme of the vibration detection device of the steam turbine blade, the top of the support base is provided with a positioning hole.

[0015] As a preferred scheme of the vibration detection device of the steam turbine blade, the hoisting mechanism further comprises a pushing assembly fixed to the outer wall of the push disc, the pushing assembly comprises a connecting rod fixed to the outer wall of the push disc, and a pin member fixed to the end of the connecting rod.

[0016] As a preferred scheme of the vibration detection device of the steam turbine blade, the pin member comprises a receiving sleeve fixed to the bottom end of the connecting rod, and a second spring fixed to the receiving sleeve, the end of the second spring is fixedly installed with a sliding disc, and the end of the sliding disc is fixedly installed with an abutting block, and the outer wall of the abutting block is provided with a groove.

[0017] As a preferred scheme of the vibration detection device of the steam turbine blade, the inner wall of the groove is provided with a guide surface, and the end of the abutting block is provided with an inclined surface.

[0018] The vibration detection device of the steam turbine blade has the following advantages: the steam turbine rotor is placed on the detection table, the steam turbine rotor is connected with the driving device through the shaft coupling, the hoisting assembly is connected with the sling, the lifting of the closed shell is controlled by winding the sling through the crane or winch, the abutting block is deflected to a certain angle and loses the abutment with the extrusion member in the process of the descent of the closed shell, the abutting block is deflected and reset under the gravity of the counterweight, the abutting block is fixed between the closed shell and the detection table, the vibration of the blade of the steam turbine rotor is detected by the blade tip timing sensor when the steam turbine rotor is rotated at high speed by the driving device, the abutting block is rotated when the steam turbine rotor or the blade thereon is replaced, the closed shell is lifted by pulling the sling, the closed shell and the detection table are separated, the steam turbine rotor is taken out, and the closed shell is disassembled and hoisted. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0020] Fig. 1 is a whole schematic view of the vibration detection device of the steam turbine blade.

[0021] Fig. 2 is a schematic view of the connection structure between the detection table and the guide column of the vibration detection device of the steam turbine blade.

[0022] Fig. 3 is a schematic diagram of the closed shell and butt joint hole connection structure of the vibration detection device of the steam turbine blade.

[0023] Fig. 4 is a schematic diagram of the tip timing sensor distribution state structure of the vibration detection device of the steam turbine blade.

[0024] Fig. 5 is a schematic diagram of the sectional structure of the locking mechanism and hoisting mechanism of the vibration detection device of the steam turbine blade.

[0025] Fig. 6 is a schematic diagram of the hoisting mechanism structure of the vibration detection device of the steam turbine blade.

[0026] Fig. 7 is a schematic diagram of the support seat and positioning hole connection structure of the vibration detection device of the steam turbine blade.

[0027] Fig. 8 is a schematic diagram of the clamping block structure of the vibration detection device of the steam turbine blade.

[0028] Fig. 9 is a schematic diagram of the clamping pin structure of the vibration detection device of the steam turbine blade.

[0029] In the drawings: 100, detection mechanism; 101, detection table; 102, closed shell; 103, tip timing sensor; 101a, guide column; 102a, butt joint hole; 200, steam turbine rotor; 300, locking mechanism; 301, support seat; 302, support shaft; 303, clamping block; 304, counterweight; 305, support pad; 301a, positioning hole; 303a, arc surface; 303b, fitting surface; 303c, insertion slot; 303d, recess; 303e, guide surface; 400, hoisting mechanism; 401, extrusion piece; 402, hoisting assembly; 403, actuating assembly; 401a, extrusion block; 401b, through hole; 401c, abutting arc surface; 402a, hoisting frame; 402b, limiting sleeve; 402c, buffer piece; 402d, hoisting head; 402c-1, sliding rod; 402c-2, abutting sleeve; 402c-3, push disc; 402c-4, first spring; 402c-5, insertion rod; 403a, connecting rod; 403b, clamping pin; 403b-1, containing sleeve; 403b-2, second spring; 403b-3, sliding disc; 403b-4, abutting block; 403b-5, inclined surface. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0031] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details set forth in this description. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as not to unnecessarily obscure aspects of the present application.

[0032] It should also be noted that, as used herein, "the embodiment" and "embodiments" refers to any one of the implementations of the present application, including interpretations of the present application that are not explicitly described in the following description and / or illustrations. Additionally, "the embodiment" and "embodiments" as used herein does not necessarily have to refer to the same embodiments, and / or can include priority-preserving combinations of the different embodiments unless otherwise stated and / or unless explicitly stated to the contrary.

[0033] Embodiment 1, referring to FIG. 1 to FIG. 4, is the first embodiment of the present application, which provides a vibration detection device for steam turbine blades, comprising a detection mechanism 100, which includes a detection table 101, and a closed shell 102 arranged on the detection table 101, the inner wall of the detection table 101 and the inner wall of the closed shell 102 are both provided with tip timing sensors 103 arranged in a circle; in this embodiment, the tip timing sensors 103 can obtain the arrival time of the blades, and then calculate the vibration displacement of the blades in combination with the rotational speed and the rotor diameter, so as to facilitate the detection of the vibration of the steam turbine blades.

[0034] A steam turbine rotor 200 is arranged on the detection table 101 and is located between the detection table 101 and the closed shell 102; in this embodiment, the steam turbine rotor 200 is hoisted on the detection table 101, and after hoisting is completed, the closed shell 102 is buckled on the detection table 101, and the detection table 101 and the closed shell 102 form a closed space to limit the steam turbine rotor 200, and the steam turbine rotor 200 can be connected to an external driving device through a shaft coupling, and the steam turbine rotor 200 is driven to rotate at high speed by the driving device to simulate the state of the steam turbine rotor 200 during operation.

[0035] A locking mechanism 300 is provided, which includes a support seat 301 fixedly arranged on the outer wall of the detection table 101, and a support shaft 302 fixedly arranged at the top end of the support seat 301, the outer wall of the support shaft 302 is rotatably connected with a clamping block 303, and the outer wall of the clamping block 303 is fixedly arranged with a counterweight 304, and the support seat 301 is provided with a support pad 305; in this embodiment, the locking mechanism 300 is provided with four, and is arranged at the four corners of the outer wall of the detection table 101, the clamping block 303 can rotate on the outer wall of the support shaft 302, and under the action of the gravity of the counterweight 304, the bottom of the clamping block 303 can be attached to the top of the support pad 305.

[0036] The lifting mechanism 400 includes an extrusion piece 401 fixed on the outer wall of the closed shell 102, and a lifting assembly 402 fixed on the outer wall of the extrusion piece 401; in the embodiment, four lifting mechanisms 400 are provided, and each lifting mechanism 400 is provided in one-to-one correspondence with the locking mechanism 300, the extrusion piece 401 is used for extruding the one end of the clamping block 303 close to the detection table 101, the lifting assembly 402 is connected with the sling, and the lifting of the closed shell 102 can be controlled by winding the sling through the crane or the winch.

[0037] It should be noted that during the process that the closed shell 102 is lowered to be attached to the detection table 101, the extrusion piece 401 can push the clamping block 303 to deflect, the clamping block 303 loses the resistance with the extrusion piece 401 after deflecting to a certain angle, at this time, the closed shell 102 and the detection table 101 are just in the attached state, the counterweight 304 presses down the clamping block 303 to make the clamping block 303 deflect, under the action of the gravity of the counterweight 304, the clamping block 303 is reset to make the attachment surface 303b and the top of the support pad 305 attached, under the mutual cooperation of the four clamping blocks 303 and the four extrusion pieces 401, the clamping block 303 clamps and positions the extrusion piece 401, and the locking of the closed shell 102 and the detection table 101 is completed.

[0038] Specifically, the top edge of the detection table 101 is fixed with a plurality of uniformly distributed guide columns 101a, and the bottom edge of the closed shell 102 is provided with a plurality of uniformly distributed butt joints 102a; in the embodiment, the outer wall of the guide column 101a and the inner wall of the butt joint 102a are in sliding connection, and the plurality of guide columns 101a and the plurality of butt joints 102a cooperate to facilitate the alignment of the closed shell 102 with the detection table 101 during the lowering of the closed shell 102, and the top end of the guide column 101a is treated with an inverted bevel or an inverted round corner to facilitate the alignment and insertion of the guide column 101a and the butt joint 102a.

[0039] Further, one side of the clamping block 303 away from the counterweight 304 is provided with an arc surface 303a, and the other side of the clamping block 303 close to the support pad 305 is provided with an attachment surface 303b; in the embodiment, the axis of the arc surface 303a coincides with the axis of the support shaft 302, and the clamping block 303 can keep a compact state between the clamping block 303 and other structures after rotating and resetting, thereby improving the strength of the structure, and the attachment surface 303b is used to attach the top of the support pad 305.

[0040] Preferably, the extrusion piece 401 includes an extrusion block 401a fixed on the outer wall of the closed shell 102, and a resistance arc surface 401c provided on the side of the extrusion block 401a away from the closed shell 102; in the embodiment, the resistance arc surface 401c can facilitate the smooth deflection of the clamping block 303 when the extrusion block 401a extrudes the clamping block 303.

[0041] In use, first, the steam turbine rotor 200 is placed on the detection table 101, the steam turbine rotor 200 is connected with the driving device through the shaft coupling, the hoisting assembly 402 is connected with the sling, the lifting of the closed shell 102 can be controlled by winding the sling through the crane or winch, the closed shell 102 is hoisted on the detection table 101, in the process of lowering the closed shell 102, the surface of the extrusion block 401a will first touch the clamping block 303, with the deflection of the clamping block 303 and the lowering of the extrusion block 401a, the abutting arc surface 401c will touch the surface of the clamping block 303, so that the clamping block 303 is deflected outside the supporting shaft 302, the clamping block 303 is deflected to a certain angle and loses the abutting with the abutting arc surface 401c, at this time, the closed shell 102 and the detection table 101 are just in the state of adhesion, under the action of the gravity of the counterweight 304, the clamping block 303 is deflected to reset, so that the adhesion surface 303b and the top of the supporting pad 305 are adhered, at this time, the arc surface 303a and the abutting arc surface 401c are in the tangential state, the tangential state of the arc surface 303a and the abutting arc surface 401c is maintained, and the adhesion surface 303b and the supporting pad 305 are maintained in the adhesion state, so that the movement of the extrusion block 401a is limited, the extrusion block 401a is prohibited from rising, the closed shell 102 is limited by the guide column 101a and the butt joint hole 102a, the connection between the closed shell 102 and the detection table 101 is completed, at the same time of hoisting, the clamping and fixing between the closed shell 102 and the detection table 101 is formed, when the driving device drives the steam turbine rotor 200 to rotate at high speed, the vibration detection of the blade of the steam turbine rotor 200 is performed through the blade tip timing sensor 103.

[0042] When the steam turbine rotor 200 or the blade thereon is replaced, the closed shell 102 in the adhesion state with the detection table 101 needs to be opened and separated, when opening, the clamping block 303 is manually rotated, the arc surface 303a rotates around the supporting shaft 302 and gradually moves away from the abutting arc surface 401c, when the upper part of the abutting arc surface 401c loses the limitation of the arc surface 303a, the upward pulling of the sling can make the closed shell 102 rise, and the separation of the closed shell 102 and the detection table 101 is completed.

[0043] Embodiment 2, referring to FIGS. 1-8, the second embodiment of the application is different from the previous embodiment in that the hoisting assembly 402 includes a hoisting frame 402a fixedly arranged on the outer wall of the extrusion block 401a, and a limiting sleeve 402b fixedly arranged on the top of the hoisting frame 402a, the inner wall of the limiting sleeve 402b is slidably connected with a buffer 402c, and the top end of the buffer 402c is fixedly installed with a hoisting head 402d, in this embodiment, the hoisting head 402d is used to be connected with the sling.

[0044] Specifically, the buffer 402c includes a sliding rod 402c-1 slidingly arranged in the inner wall of the limiting sleeve 402b, and a contact sleeve 402c-2 fixedly arranged at the bottom end of the sliding rod 402c-1, the bottom end of the contact sleeve 402c-2 is fixedly installed with a push disc 402c-3, the outer wall of the contact sleeve 402c-2 and the sliding rod 402c-1 is sleeved with a first spring 402c-4, and the buffer 402c further includes an insertion rod 402c-5 fixedly arranged at the bottom end of the push disc 402c-3.

[0045] Further, the extrusion piece 401 further includes a through hole 401b arranged on the extrusion block 401a; the clamping block 303 is provided with an insertion slot 303c; the top of the supporting seat 301 is provided with a positioning hole 301a, and in this embodiment, the shaft centers of the through hole 401b, the insertion slot 303c and the positioning hole 301a coincide with each other.

[0046] The remaining structures are the same as those in Embodiment 1.

[0047] When the closed shell 102 is controlled to be lowered to be attached to the detection table 101, due to the gravity of the closed shell 102 itself, the first spring 402c-4 is in a compressed state, the contact sleeve 402c-2 and the limiting sleeve 402b are in a contact state, and the insertion rod 402c-5 is pulled out from the inside of the through hole 401b, when the closed shell 102 just contacts the surface of the detection table 101, the first spring 402c-4 is still in a compressed state, in the process of lowering the closed shell 102, the surface of the extrusion block 401a will first contact the clamping block 303, with the deflection of the clamping block 303 and the lowering of the extrusion block 401a, the contact arc surface 401c will contact the surface of the clamping block 303, so that the clamping block 303 is deflected outside the supporting shaft 302, and the clamping block 303 is deflected to a certain angle and loses contact with the contact arc surface 401c, at this time, the closed shell 102 and the detection table 101 are just in an attached state, under the gravity of the counterweight 304, the clamping block 303 is deflected to reset, so that the attached surface 303b and the top of the supporting pad 305 are attached, at this time, the arc surface 303a and the contact arc surface 401c are in a tangent state, the tangent state of the arc surface 303a and the contact arc surface 401c is maintained, and the attached surface 303b and the supporting pad 305 are maintained in an attached state, which can limit the movement of the extrusion block 401a and prohibit the extrusion block 401a from rising, then the lifting cable is continuously lowered, the push disc 402c-3 is pushed by the elastic force of the first spring 402c-4, the insertion rod 402c-5 is inserted into the insertion slot 303c and the through hole 401b, and is inserted into the inside of the positioning hole 301a, the insertion of the insertion rod 402c-5 can lock the clamping block 303, increase the stability after the closed shell 102 and the detection table 101 are connected, and avoid the phenomenon of loosening and falling off, because the inner wall of the insertion slot 303c contacts the outer wall of the insertion rod 402c-5, the clamping block 303 cannot be deflected and shaken.

[0048] When the steam turbine rotor 200 or the blade thereon is replaced, the closed shell 102 needs to be opened and separated from the detection table 101. When opening, the lifting head 402d is pulled up by the sling. When pulling up, the first spring 402c-4 is first compressed, the insertion rod 402c-5 is pulled out of the positioning hole 301a, the through hole 401b and the insertion slot 303c, until the abutting sleeve 402c-2 and the limiting sleeve 402b abut. At this time, the clamping block 303 is manually rotated, the arc surface 303a rotates around the support shaft 302 as the axis, and gradually moves away from the abutting arc surface 401c. When the upper part of the abutting arc surface 401c loses the limitation of the arc surface 303a, the closed shell 102 can be lifted by continuing to pull up the sling, and the separation of the closed shell 102 and the detection table 101 is completed.

[0049] Embodiment 3, referring to FIGS. 1-9, is the third embodiment of the application. Different from the previous embodiment, the lifting mechanism 400 further comprises a pushing assembly 403 fixedly arranged on the outer wall of the pushing disc 402c-3. In this embodiment, the outer wall of each pushing disc 402c-3 is provided with two symmetrically arranged pushing assemblies 403.

[0050] Further, the pushing assembly 403 comprises a connecting rod 403a fixedly arranged on the outer wall of the pushing disc 402c-3, and a clamping pin 403b fixedly arranged on the end of the connecting rod 403a. In this embodiment, the connecting rod 403a has an L-shaped structure.

[0051] Specifically, the clamping pin 403b comprises a containing sleeve 403b-1 fixedly arranged on the bottom end of the connecting rod 403a, and a second spring 403b-2 fixedly arranged in the containing sleeve 403b-1. The end of the second spring 403b-2 is fixedly installed with a sliding disc 403b-3, and the end of the sliding disc 403b-3 is fixedly installed with an abutting block 403b-4. In this embodiment, the sliding disc 403b-3 can slide on the inner wall of the containing sleeve 403b-1, and one end of the abutting block 403b-4 penetrates the containing sleeve 403b-1.

[0052] It should be noted that the outer wall of the clamping block 303 is provided with a groove 303d, which is designed to facilitate the extension of the abutting block 403b-4.

[0053] Further, the inner wall of the groove 303d is provided with a guide surface 303e. In this embodiment, the guide surface 303e is designed to facilitate the deflection of the clamping block 303 when the abutting block 403b-4 is lifted after being clamped in the groove 303d.

[0054] Preferably, the end of the abutting block 403b-4 is provided with a slope 403b-5, in the embodiment, the slope 403b-5 is configured to guide the abutting block 403b-4 to slide into the accommodating sleeve 403b-1 when the abutting block 403b-4 is lowered to be close to the clamping block 303.

[0055] The rest of the structure is the same as that of the embodiment 2.

[0056] When the closed shell 102 and the detection platform 101 are attached, the clamping block 303 and the extrusion block 401a are clamped, the control sling is lowered, the push disc 402c-3 is lowered under the elastic force of the first spring 402c-4, the abutting block 403b-4 firstly contacts the surface of the clamping block 303 protruding from the groove 303d, the second spring 403b-2 is compressed under the guidance of the slope 403b-5, and then the abutting block 403b-4 slides into the accommodating sleeve 403b-1, when the abutting block 403b-4 enters the area where the groove 303d is located, the abutting block 403b-4 is pushed out by the elastic force of the second spring 403b-2, and the insertion rod 402c-5 is inserted into the positioning hole 301a.

[0057] When the sling hoists the lifting head 402d, the first spring 402c-4 is compressed, the insertion rod 402c-5 is just pulled out from the insertion slot 303c, the abutting block 403b-4 just contacts the guide surface 303e due to the upward movement, the abutting block 403b-4 continues to move upward to push the guide surface 303e, the clamping block 303 is deflected, when the abutting sleeve 402c-2 and the limiting sleeve 402b are in contact, the abutting block 403b-4 is still in contact with the guide surface 303e, and at this time, the arc surface 303a rotates about the support shaft 302 to be away from the abutting arc surface 401c, therefore, the abutting arc surface 401c is no longer limited by the arc surface 303a, and with the continuous upward movement of the sling, the extrusion block 401a is lifted, after the extrusion block 401a is lifted to a certain height, the abutting block 403b-4 is separated from the groove 303d, the closed shell 102 can continue to be lifted, the clamping block 303 is deflected to be reset under the gravity of the counterweight 304, and the closed shell 102 and the detection platform 101 are disassembled, that is, the closed shell 102 and the detection platform 101 are connected and fixed by hoisting.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A vibration detection device for a turbine blade, characterized by: The utility model relates to a detection mechanism (100) and a locking mechanism (300) and a hoisting mechanism (400), and the detection mechanism (100) comprises a detection table (101) and a closed shell (102) arranged on the detection table (101), and the inner wall of the detection table (101) and the inner wall of the closed shell (102) are both provided with tip timing sensors (103) in circumferential distribution. A steam turbine rotor (200) is arranged on the detection table (101) and is placed between the detection table (101) and the closed shell (102). The locking mechanism (300) comprises a support seat (301) fixedly arranged on the outer wall of the detection table (101), a support shaft (302) fixedly arranged at the top end of the support seat (301), a clamping block (303) rotationally connected to the outer wall of the support shaft (302), a counterweight block (304) fixedly arranged on the outer wall of the clamping block (303), and a support pad (305) arranged on the support seat (301). One side of the clamping block (303) away from the counterweight block (304) is provided with an arc surface (303a), and the other side of the clamping block (303) close to the support pad (305) is provided with a matching surface (303b). The hoisting mechanism (400) comprises an extrusion piece (401) fixedly arranged on the outer wall of the closed shell (102) and a hoisting assembly (402) fixedly arranged on the outer wall of the extrusion piece (401). During the process of lowering the closed shell (102) to match the detection table (101), the extrusion piece (401) can push the clamping block (303) to deflect, the clamping block (303) loses the resistance of the extrusion piece (401) after deflecting to a certain angle, under the action of the gravity of the counterweight block (304), the counterweight block (304) presses down the clamping block (303) to make the clamping block (303) deflect and reset, so that the matching surface (303b) matches the top of the support pad (305), under the mutual action of the clamping block (303) and the extrusion piece (401), the clamping block (303) clamps and positions the extrusion piece (401), and the locking of the closed shell (102) and the detection table (101) is completed. The top edge of the detection table (101) is fixedly provided with a plurality of uniformly distributed guide columns (101a), and the bottom edge of the closed shell (102) is provided with a plurality of uniformly distributed butt joints (102a).

2. The vibration detecting device for a turbine blade according to claim 1, characterized by: The outer wall of the guide column (101a) and the inner wall of the butt joint (102a) are in sliding connection. The extrusion piece (401) comprises an extrusion block (401a) fixedly arranged on the outer wall of the closed shell (102) and a resistance arc surface (401c) arranged on the side of the extrusion block (401a) away from the closed shell (102).

3. A vibration detection device for a turbine blade as claimed in claim 1 or 2, characterised in that: ​ 4. The vibration detecting apparatus for a turbine blade according to claim 3, wherein: The lifting assembly (402) comprises a lifting frame (402a) fixedly arranged on the outer wall of the extrusion block (401a), and a limiting sleeve (402b) fixedly arranged on the top of the lifting frame (402a), and the inner wall of the limiting sleeve (402b) is slidably connected with a buffer (402c), and the top end of the buffer (402c) is fixedly connected with a lifting head (402d).

5. A turbine blade vibration detection apparatus as claimed in claim 4, wherein: The buffer (402c) comprises a sliding rod (402c-1) slidably arranged on the inner wall of the limiting sleeve (402b), and a contact sleeve (402c-2) fixedly arranged on the bottom end of the sliding rod (402c-1), and the bottom end of the contact sleeve (402c-2) is fixedly connected with a push disc (402c-3), and the outer wall of the contact sleeve (402c-2) and the sliding rod (402c-1) is sleeved with a spring (402c-4), and further comprising an insertion rod (402c-5) fixedly arranged on the bottom end of the push disc (402c-3).

6. A turbine blade vibration detection apparatus as claimed in claim 5, wherein: The extrusion piece (401) further comprises a through hole (401b) arranged on the extrusion block (401a). The clamping block (303) is provided with an insertion slot (303c).

7. A turbine blade vibration detection apparatus as claimed in claim 6, wherein: The top of the supporting seat (301) is provided with a positioning hole (301a).

8. A turbine blade vibration detection apparatus as claimed in claim 7, wherein: The lifting mechanism (400) further comprises a pushing assembly (403) fixedly arranged on the outer wall of the push disc (402c-3). The pushing assembly (403) comprises a connecting rod (403a) fixedly arranged on the outer wall of the push disc (402c-3), and a clamping pin (403b) fixedly arranged on the end of the connecting rod (403a).

9. A turbine blade vibration detection apparatus as claimed in claim 8, wherein: The clamping pin (403b) comprises a containing sleeve (403b-1) fixedly arranged on the bottom end of the connecting rod (403a), and a second spring (403b-2) fixedly arranged in the containing sleeve (403b-1), and the end of the second spring (403b-2) is fixedly connected with a sliding disc (403b-3), and the end of the sliding disc (403b-3) is fixedly connected with a contact block (403b-4). The outer wall of the clamping block (303) is provided with a groove (303d).

10. A turbine blade vibration detection apparatus as claimed in claim 9, wherein: The inner wall of the groove (303d) is provided with a guide surface (303e). The end of the contact block (403b-4) is provided with an inclined surface (403b-5).

Images