Steam turbine detection device

Abstract

The invention discloses a steam turbine detection device, which belongs to the technical field of steam turbines and comprises a base and a detection mechanism. Wherein the detection mechanism comprises a translation assembly, a first detection assembly and a second detection assembly; wherein the translation assembly comprises two side plates II; the bottoms of the two second side plates are detachably connected with the two first side plates respectively. The tops of the two second side plates are connected through two transverse rods. The inner side parts of the two side plates II are respectively provided with a second semicircular pipe, and the first semicircular pipe and the second semicircular pipes form a whole circular pipe; the first detection assembly and the second detection assembly are respectively connected with the translation assembly and are respectively used for detecting cracks on the surface of an impeller of the steam turbine and the balance degree of a blade in the vertical direction; by means of the design, impeller peripheral crack detection and balance degree detection of the blades in the vertical direction can be achieved at the same time, and the blades are cleaned in the detection process.

Description

Technical Field

[0001] The present invention belongs to the technical field of steam turbines, and in particular relates to a steam turbine detection device. Background Art

[0002] The turbine impeller is a key component of the turbine, and its health directly affects the safety and efficiency of the equipment. Currently, impeller inspection mainly relies on traditional methods such as ultrasonic and magnetic particle inspection, which have the following problems:

[0003] 1. Single function: It can only detect cracks on the impeller surface, but cannot detect the balance status between blades at the same time. Blade imbalance will cause large vibrations in the turbine rotor during operation, thus reducing the service life of the equipment.

[0004] 2. Limited detection accuracy: Impurities on the impeller surface affect the detection results, and the existing cleaning method often uses an independent cleaning mechanism, which is more complicated to operate;

[0005] In view of the deficiencies in the prior art, the present invention provides a steam turbine detection device, aiming to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a steam turbine detection device that can simultaneously detect cracks on the impeller periphery and the balance of the blades in the vertical direction, and clean the blades during the detection process.

[0007] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0008] A steam turbine detection device, comprising:

[0009] A base, wherein both sides of the base are vertically connected to side panels 1, and the inner sides of the two side panels 1 are respectively provided with first semicircular tubes; the top of the base is fixedly connected to two support brackets for placing steam turbines; the rotors on both sides of the steam turbine are movably connected to the two first semicircular tubes, and one of the rotors passes through the side panel 1 and is driven by a motor 1, and the motor 1 is provided on the outer side of the side panel 1;

[0010] The detection mechanism includes a translation component, a first detection component and a second detection component; wherein,

[0011] The translation assembly includes two side panels 2; the bottoms of the two side panels 2 are detachably connected to the two side panels 1 respectively; the tops of the two side panels 2 are connected by two cross bars; and the inner sides of the two side panels 2 are respectively provided with a second semicircular tube, and the first semicircular tube and the second semicircular tube form a full circular tube;

[0012] The first detection assembly and the second detection assembly are respectively connected to the translation assembly and are used to detect cracks on the surface of the turbine impeller and the balance of the blade in the vertical direction.

[0013] Preferably, the translation assembly comprises:

[0014] The two ends of the lead screw are connected to the two side plates through bearings respectively;

[0015] At least one guide rod, two ends of which are respectively connected to the two side plates;

[0016] a nut, threadedly connected to the lead screw;

[0017] a guide block connected to the outer periphery of the nut and movably connected to the guide rod;

[0018] Motor 2 is arranged on the outer side of one of the side plates 2, and its output end is connected to one end of the lead screw.

[0019] Preferably, the first detection component includes:

[0020] Cylinder 1, disposed on the top of the guide block, and having an output end passing through the guide block;

[0021] The electromagnetic induction sensor is arranged at the output end of the first cylinder.

[0022] Preferably, the second detection component includes:

[0023] A mounting bracket (∩) is connected to the output end of the cylinder 1 and is located above the electromagnetic induction sensor;

[0024] Two vibration sensors are respectively embedded in the two outer sides of the "∩" mounting frame; and the two vibration sensors are arranged at two sides below the electromagnetic induction sensor.

[0025] Preferably, it further comprises a cleaning mechanism, wherein two cleaning mechanisms are provided, each comprising:

[0026] Cylinder 2, disposed on the top of the guide block, with its output end passing through the guide block;

[0027] The movable plate is connected to the output end of the second cylinder; a plurality of cleaning brushes are evenly distributed around the movable plate.

[0028] Preferably, at least one positioning hole is respectively provided on the same vertical direction of the two side panels 1 and the two side panels 2.

[0029] Preferably, it further comprises a plurality of positioning rods, which are sequentially inserted into the positioning holes of the second side panel and the first side panel.

[0030] Preferably, the motor 1 can also be detachably connected to the outer side of the side panel 2.

[0031] Preferably, it further includes a controller, which is connected to the second motor, the first cylinder and the second cylinder.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention is designed to connect the first detection component and the second detection component with the guide block in the translation component. When the guide block moves, it can detect whether there are cracks on the surface of the turbine impeller while also detecting the balance of the blade in the vertical direction, thereby promptly discovering the imbalance problem of the blade and increasing the service life of the equipment.

[0034] 2. The present invention introduces a cleaning mechanism and links it with the detection mechanism, which can clean the blades while detecting, remove impurities such as dust and oil on the blades, and improve detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of the present invention.

[0036] Figure 2 It is a partial enlarged view A of the present invention.

[0037] Figure 3 It is a partial enlarged view B of the present invention.

[0038] Figure 4 It is a partial enlarged view C of the present invention.

[0039] Figure 5 It is a front view of the present invention.

[0040] Figure 6 It is a partial enlarged view D of the present invention.

[0041] Figure 7 It is a structural schematic diagram of the cleaning mechanism of the present invention.

[0042] Figure 8 It is a partial enlarged view E of the present invention.

[0043] Figure 9 It is a partial enlarged view F of the present invention.

[0044] in:

[0045] 1. Base; 11. Support frame; 12. Side panel 1; 121. Positioning hole; 13. First semicircular tube; 2. Steam turbine; 21. Impeller; 22. Blades; 23. Rotor; 3. Motor 1; 4. Detection mechanism; 41. Side panel 2; 411. Second semicircular tube; 42. Cross bar; 43. Positioning rod; 44. Translation assembly; 441. Lead screw; 442. Guide rod; 443. Nut; 444. Guide block; 445. Motor 2; 45. First detection assembly; 451. Cylinder 1; 452. Electromagnetic induction sensor; 46. Second detection assembly; 461. “∩” mounting bracket; 462. Vibration sensor; 5. Cleaning mechanism; 51. Cylinder 2; 52. Moving plate; 53. Cleaning brush. DETAILED DESCRIPTION

[0046] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0047] In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0048] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] Example 1

[0050] refer to Figures 1-9 This embodiment provides a steam turbine detection device, including:

[0051] A base 1, with side panels 12 vertically connected to both sides of the base 1, and first semicircular tubes 13 provided on the inner sides of the two side panels 12; two support brackets 11 for placing the steam turbine 2 are fixedly connected to the top of the base 1; rotors 23 on both sides of the steam turbine 2 are movably connected to the two first semicircular tubes 13, one of the rotors 23 passes through the side panel 12 and is driven by a motor 3, which is provided on the outer side of the side panel 12;

[0052] The detection mechanism 4 includes a translation component 44, a first detection component 45 and a second detection component 46; wherein,

[0053] The translation assembly 44 includes two side panels 41; the bottoms of the two side panels 41 are detachably connected to the two side panels 12; the tops of the two side panels 41 are connected by two cross bars 42; and the inner sides of the two side panels 41 are respectively provided with second semicircular tubes 411, and the first semicircular tube 13 and the second semicircular tube 411 form a full circular tube;

[0054] The first detection assembly 45 and the second detection assembly 46 are respectively connected to the translation assembly 44 and are used to detect cracks on the surface of the impeller 21 of the steam turbine 2 and the balance of the blade 22 in the vertical direction.

[0055] In order to increase the stability and precision of the device, in this embodiment, at least one positioning hole 121 is respectively provided on the same vertical direction of the two side panels 12 and the two side panels 2 41 .

[0056] Furthermore, the present invention also includes a plurality of positioning rods 43 , which are sequentially inserted into the positioning holes 121 of the second side panel 41 and the first side panel 12 .

[0057] In order to comply with the detachable connection of the detection mechanism 4 , in this embodiment, the motor 1 3 can also be detachably connected to the outer side of the side panel 2 41 .

[0058] Preferably, when in use, the detection mechanism 4 is first disassembled, and then the main shaft of the turbine 2 is placed on two support brackets 11, and then the two side plates 2 41 of the detection mechanism 4 are aligned with the two side plates 1 12, so that the first semicircular tube 13 and the second semicircular tube 411 are closed and fixed by a number of positioning rods 43; the motor 1 3 is respectively connected to the side plate 12 and the side plate 2 41; the rotors 23 on both sides of the turbine 2 are movably connected in the two first semicircular tubes 13, and the motor 1 3 is started to drive the rotor 23 of the turbine 2 to rotate, providing the necessary rotation conditions for subsequent detection.

[0059] In this embodiment, the present invention is designed to connect the first detection component 45 and the second detection component 46 with the guide block 444 in the translation component 44. When the guide block 444 moves, it can detect whether there are cracks on the surface of the impeller 21 of the turbine 2 while also detecting the balance of the blade 22 in the vertical direction, thereby promptly discovering the imbalance problem of the blade 22 and increasing the service life of the equipment.

[0060] Specifically, the translation assembly 44 includes:

[0061] The ends of the lead screw 441 are connected to the two side plates 41 through bearings;

[0062] At least one guide rod 442, with its two ends respectively connected to the two side plates 41;

[0063] A nut 443 is threadedly connected to the lead screw 441;

[0064] a guide block 444 connected to the outer periphery of the nut 443 and movably connected to the guide rod 442;

[0065] The second motor 445 is disposed on the outer side of one of the second side plates 41 , and its output end is connected to one end of the lead screw 441 .

[0066] Working principle:

[0067] According to the needs of the detection position, start motor 2 445, and the output end of motor 2 445 drives the screw 441 to rotate; when the screw 441 rotates, the nut 443 moves along the screw 441, and the guide block 444 translates horizontally under the guidance of the guide rod 442; the translation assembly 44 drives the first detection assembly 45 and the second detection assembly 46 to move to the specified position, ready for detection.

[0068] In this embodiment, the present invention realizes the precise translation of the first detection component 45 and the second detection component 46 through the combination of the screw 441, the guide rod 442, the nut 443 and the guide block 444, and can adjust the detection position as needed to cover various parts of the impeller 21 of the turbine 2.

[0069] Specifically, the first detection component 45 includes:

[0070] Cylinder 1 451 is disposed on the top of the guide block 444, and its output end passes through the guide block 444;

[0071] Electromagnetic induction sensor 452, located at the output end of cylinder 1 451, identifies cracks by detecting changes in the electromagnetic field on the surface of impeller 21. When electromagnetic induction sensor 452 is close to the surface of impeller 21, if there is a crack on the surface of impeller 21, the electromagnetic field will change. Electromagnetic induction sensor 452 can capture this change and output a signal.

[0072] Working principle:

[0073] The translation assembly 44 moves the first detection assembly 45 to a preset detection position on the surface of the impeller 21; the controller controls the cylinder 1 451 to start, pushing the electromagnetic induction sensor 452 close to the surface of the impeller 21; the electromagnetic induction sensor 452 starts working, detecting whether there are cracks on the surface of the impeller 21, and transmitting the detection signal to the controller.

[0074] In this embodiment, the present invention can detect cracks on the surface and near the surface of the impeller 21 with high precision through the electromagnetic induction sensor 452, is suitable for non-destructive testing of metal materials, and the detection results are reliable.

[0075] Specifically, the second detection component 46 includes:

[0076] The mounting bracket 461 is connected to the output end of the cylinder 1 451 and is located above the electromagnetic induction sensor 452;

[0077] Two vibration sensors 462 are embedded in the outer sides of the "∩" mounting bracket 461 and located below and on either side of the electromagnetic induction sensor 452. They are used to detect vibration signals during operation of the steam turbine 2. When the blades 22 are vertically unbalanced, the steam turbine 2 generates vibrations of a specific frequency. The vibration sensors 462 capture these vibration signals and determine the balance state of the blades 22 by analyzing their frequency and amplitude.

[0078] Working principle:

[0079] While the translation component 44 drives the first detection component 45 to move, it also drives the second detection component 46 to move to the preset detection position on the surface of the impeller 21; at this time, the vibration sensors 462 on both sides of the "∩"-shaped mounting frame are set in the gap between the blades 22; the vibration sensors 462 start to work, detect the vibration signal of the turbine 2 during operation, and transmit the signal to the controller; the controller analyzes the vibration signal and determines the balance state of the blade 22 in the vertical direction.

[0080] Example 2

[0081] refer to Figure 1 、 Figure 7-Figure 9 Based on the first embodiment, the present invention also has the following design.

[0082] Furthermore, the present invention also includes a cleaning mechanism 5, wherein two cleaning mechanisms 5 are provided, each comprising:

[0083] Cylinder 2 51 is provided on the top of the guide block 444, and its output end passes through the guide block 444;

[0084] The movable plate 52 is connected to the output end of the second cylinder 51 ; a plurality of cleaning brushes 53 are evenly distributed around the movable plate 52 .

[0085] Working principle:

[0086] While the translation component 44 drives the first detection component 45 and the second moving component to move, it also drives the cleaning mechanism 5 to move into the gap between the blades 22; the controller controls the cylinder 2 51 to start, pushing the movable plate 52 between the blades 22; the cleaning brush 53 contacts the surface of the blade 22 and begins to clean the dust and impurities on the surface of the blade 22; after the cleaning is completed, the cylinder 2 51 is retracted, and the movable plate 52 and the cleaning brush 53 leave the surface of the impeller 21.

[0087] In this embodiment, the present invention introduces a cleaning mechanism 5 and links it with the detection mechanism 4, which can clean the blades 22 while detecting, remove impurities such as dust and oil on the blades 22, and improve detection accuracy.

[0088] In order to realize automatic control of the device, in this embodiment, a controller is further included, and the controller is connected to the motor 2 445 , the cylinder 1 451 and the cylinder 2 51 .

[0089] In summary, through the working principles and work processes of the above mechanisms, the steam turbine 2 detection device of the present invention can efficiently and accurately complete the crack detection, balance detection and cleaning of the impeller 21, improve the detection efficiency and accuracy, and ensure the safe operation of the steam turbine 2.

[0090] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A steam turbine detection device, characterized in that: include: A base (1), wherein both sides of the base (1) are vertically connected to side panels (12), and the inner sides of the two side panels (12) are respectively provided with first semicircular tubes (13); the top of the base (1) is fixedly connected to two support brackets (11) for placing the steam turbine (2); the rotors (23) on both sides of the steam turbine (2) are movably connected to the two first semicircular tubes (13), and one of the rotors (23) passes through the side panel (12) and is driven by a motor (3), and the motor (3) is provided on the outer side of the side panel (12); The detection mechanism (4) includes a translation component (44), a first detection component (45) and a second detection component (46); wherein, The translation assembly (44) includes two side panels (41); the bottoms of the two side panels (41) are detachably connected to the two side panels (12); the tops of the two side panels (41) are connected by two cross bars (42); and the inner sides of the two side panels (41) are respectively provided with a second semicircular tube (411), and the first semicircular tube (13) and the second semicircular tube (411) form a full-circular tube; The first detection assembly (45) and the second detection assembly (46) are respectively connected to the translation assembly (44) and are used to detect cracks on the surface of the impeller (21) of the steam turbine (2) and the balance of the blade (22) in the vertical direction.

2. The steam turbine detection device according to claim 1, characterized in that: The translation assembly (44) includes: The two ends of the lead screw (441) are connected to the two side plates (41) through bearings respectively; At least one guide rod (442), both ends of which are connected to the two side panels (41) respectively; a nut (443) threadedly connected to the lead screw (441); A guide block (444) is connected to the outer periphery of the nut (443) and is movably connected to the guide rod (442); The second motor (445) is arranged on the outer side of one of the second side plates (41), and its output end is connected to one end of the lead screw (441).

3. The steam turbine detection device according to claim 2, characterized in that: The first detection component (45) comprises: Cylinder 1 (451), disposed on the top of the guide block (444), and having an output end passing through the guide block (444); The electromagnetic induction sensor (452) is provided at the output end of the cylinder 1 (451).

4. The steam turbine detection device according to claim 3, characterized in that: The second detection component (46) includes: A mounting bracket (461) is connected to the output end of the cylinder 1 (451) and is located above the electromagnetic induction sensor (452); Two vibration sensors (462) are respectively embedded in the two outer sides of the "∩" mounting frame (461); and the two vibration sensors (462) are arranged at two sides below the electromagnetic induction sensor (452).

5. The steam turbine detection device according to claim 2, characterized in that: It also includes a cleaning mechanism (5), wherein two cleaning mechanisms (5) are provided, each comprising: Cylinder 2 (51), disposed on the top of the guide block (444), and having an output end passing through the guide block (444); The movable plate (52) is connected to the output end of the second cylinder (51); a plurality of cleaning brushes (53) are evenly distributed around the movable plate (52).

6. The steam turbine detection device according to claim 1, characterized in that: At least one positioning hole (121) is respectively provided on the same vertical direction of the two side panels (12) and the two side panels (41).

7. The steam turbine detection device according to claim 1, characterized in that: It also includes a plurality of positioning rods (43), which are sequentially inserted into the positioning holes (121) of the second side plate (41) and the first side plate (12).

8. The steam turbine detection device according to claim 1, characterized in that: The motor 1 (3) can also be detachably connected to the outer side of the side plate 2 (41).

9. The steam turbine detection device according to claim 4 or 5, characterized in that: It also includes a controller, which is connected to the motor 2 (445), the cylinder 1 (451) and the cylinder 2 (51).

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