Through-flow unit paddle displacement measuring device

Abstract

The utility model discloses a blade displacement measuring device for a through-flow unit, which relates to the technical field of hydroelectric generation and comprises a mounting component, a blade displacement measuring component, a blade displacement measuring component and a blade displacement measuring component. The dial indicator can be installed on the rotating wheel body; the first driving structure is arranged on one side of the mounting assembly, and one end of the first driving structure can make contact with the paddle shaft; the second driving assembly comprises a pair of second driving structures and a pair of connecting pieces, the pair of connecting pieces are arranged at the two ends of the other side of the mounting assembly in a matched mode, and the pair of second driving structures are arranged in cooperation with the pair of connecting pieces correspondingly and used for driving the connecting pieces; wherein the connecting piece comprises a connecting screw rod, a fixing disc and a locking nut, and the problems that the actual value of the blade displacement cannot be accurately reflected due to large deviation between the actual value and the actual value when the blade displacement is measured at present are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydropower generation, in particular to a device for measuring the movement of blades of a tubular unit. Background Art

[0002] The blades of a tubular turbine need to make real-time rotation adjustments according to load changes. Their rotation frequency is relatively high. After a long period of operation, the runner copper bushings are greatly worn, causing the blade movement to increase beyond the design value. Therefore, the blade movement measurement is a very important measurement step in the overhaul of the tubular turbine runner. Its measurement accuracy is of guiding significance for the replacement of the runner copper bushings.

[0003] Blade movement is the radial displacement of the blades, a parameter crucial for ensuring proper operation and performance. In tubular turbines, detecting and addressing blade movement is a crucial component of unit maintenance. The appropriateness of blade movement directly impacts turbine efficiency and safety.

[0004] The traditional measurement method involves using a jack to push the distance between the blade shaft and the rotor, then measuring with a feeler gauge. This method is difficult to use due to the limited measurement space and the inconsistent extension of the jack on both sides during extension. Furthermore, the resulting value can deviate significantly from the true value, failing to accurately reflect the actual blade movement. Therefore, a device for measuring the blade movement of a tubular turbine unit that can accurately measure the actual value of blade movement is urgently needed. Utility Model Content

[0005] Based on this, in response to the above problems, the present invention proposes a device for measuring the blade movement of a cross-flow unit. Through the use of the present invention, the measuring point is arranged outside the impeller, which solves the current problem that when measuring the blade movement, the measurement is difficult, there is a large deviation from the true value, and the actual value of the blade movement cannot be accurately reflected.

[0006] The technical solution of the utility model is:

[0007] A device for measuring the amount of blade movement of a tubular turbine unit, comprising:

[0008] An installation component, the installation component can be installed on the runner body;

[0009] Dial indicator: the dial indicator can be installed on the runner body and is used to measure the movement of the blade;

[0010] A first driving structure, the first driving structure is arranged on one side of the mounting assembly, one end of the first driving structure can contact the blade shaft, and is used to drive the blade shaft;

[0011] A second drive assembly includes a pair of second drive structures and a pair of connecting members, the pair of connecting members are cooperatively arranged at both ends of the other side of the mounting assembly, and the pair of second drive structures are respectively cooperatively arranged with the pair of connecting members for driving the connecting members;

[0012] Among them, the connecting part includes a connecting screw, a fixed plate and a locking nut. One end of the connecting screw is threadedly connected to the blade shaft, the fixed plate is sleeved on the connecting screw, and the locking nut is sleeved on the other end of the connecting screw and threadedly connected to the connecting screw. The locking nut is located on one side of the fixed plate and is used to limit the movement of the fixed plate. One end of the second drive structure is in contact with the mounting assembly, and the other end is in contact with the other side of the fixed plate.

[0013] Preferably, the first driving structure is an ultra-thin hydraulic jack, and the output end of the first driving structure can be in contact with the blade shaft to drive the blade shaft.

[0014] Preferably, the second driving structure is a hollow hydraulic jack, the second driving structure is sleeved on the connecting screw, the output end of the second driving structure can contact the mounting assembly, and the other end can contact the fixed disk.

[0015] Preferably, the mounting assembly includes a mounting plate and a plurality of fixing members, wherein the plurality of fixing members are cooperatively arranged on the outside of the mounting plate, one end of the plurality of fixing members is fixedly connected to the mounting plate, and the other end is detachably connected to the rotor body.

[0016] Preferably, an arc-shaped mounting seat is provided on one side of the mounting plate, and the first driving structure can be mounted in the arc-shaped mounting seat.

[0017] Preferably, the number of fixing members is two or four. When the number of fixing members is two, the two fixing members are respectively located on both sides of the mounting plate. When the number of fixing members is four, the four fixing members are arranged on the mounting plate in a circular array around the circumference of the mounting plate.

[0018] Preferably, the fixing member includes an arc-shaped fixing block and a pair of connecting rods, one end of the pair of connecting rods is fixedly connected to the mounting plate, and the other end is fixedly connected to the arc-shaped fixing block, a clearance slot is provided between the pair of connecting rods, one end of the connecting screw can pass through the clearance slot and be threadedly connected to the blade shaft, the connecting screw and the clearance slot are clearance-matched, and the arc-shaped fixing block and the rotor body can be detachably connected by bolts.

[0019] Preferably, a pair of connecting rods are provided with a circular fixing block, and the circular fixing block is provided with a through hole, which is arranged in cooperation with the clearance slot. One end of the connecting screw can pass through the through hole and cooperate with the gap of the through hole. One end of the second driving structure contacts the circular fixing block, and the other end can contact the fixed disk.

[0020] Preferably, an arc-shaped placement platform cooperating with the second driving structure is provided on the circular fixing block, and the second driving structure can be placed on the arc-shaped placement platform.

[0021] Preferably, the dial indicator includes a dial body and a magnetic dial base for mounting the dial body, the dial body can be mounted on the magnetic dial base, and the magnetic dial base can be mounted on the rotor body.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] During use, the cross-flow unit blade movement measuring device described in the present invention is installed on the impeller body, and then the blade shaft is driven by the first drive structure to reset the blade shaft. At this time, the blade shaft is in the initial position, that is, the position where no movement occurs. Then the dial indicator is adjusted to zero. After zeroing, the first drive structure 30 is loosened (it should be noted that be careful not to touch the dial indicator during the loosening process). Then the connecting screw is screwed into the blade shaft, and then one end of the second drive structure is contacted with the mounting assembly. Then the fixed disk is moved so that it contacts the other end of the second drive structure, and is locked by the locking nut and contacts the blade shaft. Then the fixed disk is driven by the second drive structure to pull the connecting screw. The connecting screw and the blade shaft move simultaneously in the radial direction until the second drive structure can no longer continue to stretch and drive. At this time, the reading obtained by the dial indicator is the maximum movement of the blade. The utility model can quickly and accurately measure the blade movement, solving the problem that the current blade movement measurement is difficult, easily results in a large deviation from the true value, and cannot accurately reflect the actual value of the blade movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of a device for measuring the amount of blade movement of a tubular turbine unit according to an embodiment of the present utility model when it is installed on a runner body;

[0025] Figure 2 This is a schematic diagram of the structure of a device for measuring the amount of blade movement of a tubular turbine described in an embodiment of the present invention. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the structure of a device for measuring the amount of blade movement of a tubular turbine described in an embodiment of the present invention. Figure 2 ;

[0027] Figure 4 This is a partial structural diagram of a device for measuring blade movement of a tubular turbine described in an embodiment of the present utility model;

[0028] Description of reference numerals:

[0029] 1-rotor body, 2-blade shaft, 10-mounting assembly, 100-mounting plate, 101-fixing part, 102-arc-shaped mounting seat, 103-arc-shaped fixing block, 104-connecting rod, 105-allowance notch, 106-circular fixing block, 107-through hole, 108-arc-shaped placing table, 20-dial indicator, 200-meter body, 201-magnetic meter base, 30-first drive structure, 40-second drive assembly, 400-second drive structure, 401-connecting part, 402-connecting screw, 403-fixing plate, 404-locking nut. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0031] Example:

[0032] like Figures 1 to 3 As shown, in order to solve the above problems, this embodiment discloses a device for measuring the amount of blade movement of a tubular turbine, comprising:

[0033] An installation assembly 10, which can be installed on the runner body 1;

[0034] A dial indicator 20 can be mounted on the runner body 1 and is used to measure the amount of blade movement;

[0035] A first driving structure 30 is provided on one side of the mounting assembly 10 , and one end of the first driving structure 30 can contact the blade shaft 2 for driving the blade shaft 2 ;

[0036] The second drive assembly 40 includes a pair of second drive structures 400 and a pair of connectors 401. The pair of connectors 401 are provided at both ends of the other side of the mounting assembly 10. The pair of second drive structures 400 are respectively provided in cooperation with the pair of connectors 401 to drive the connectors 401.

[0037] Among them, the connecting member 401 includes a connecting screw 402, a fixed plate 403 and a locking nut 404. One end of the connecting screw 402 is threadedly connected to the blade shaft 2, the fixed plate 403 is sleeved on the connecting screw 402, and the locking nut 404 is sleeved on the other end of the connecting screw 402 and is threadedly connected to the connecting screw 402. The locking nut 404 is located on one side of the fixed plate 403 and is used to limit the movement of the fixed plate 403. One end of the second drive structure 400 is in contact with the mounting assembly 10, and the other end is in contact with the other side of the fixed plate 403.

[0038] During use, the device for measuring the amount of blade movement of a cross-flow unit described in the present invention is installed on the impeller body 1, and then the blade shaft 2 is driven by the first drive structure 30 to reset the blade shaft 2. At this time, the blade shaft 2 is in the initial position, that is, the position where no movement occurs. Then the dial indicator 20 is adjusted to zero. After zeroing, the first drive structure 30 is loosened (it should be noted that be careful not to touch the dial indicator during the loosening process). Then the connecting screw 402 is screwed into the blade shaft 2, and then one end of the second drive structure 400 is contacted with the mounting assembly 10. Then the fixed plate 403 is moved so that it contacts the other end of the second drive structure 400 and is locked by the locking nut 404 and contacts the blade shaft 2. Then the fixed plate 403 is driven by the second drive structure 400 to pull the connecting screw 402, and then pull the blade shaft 2 to move it back to the position after the movement occurs. At this time, the reading obtained by the dial indicator 20 is the amount of blade movement. The utility model can quickly and accurately measure the blade movement, solving the problem that the current blade movement measurement is difficult, easily results in a large deviation from the true value, and cannot accurately reflect the actual value of the blade movement.

[0039] It should be noted that the propeller shaft 2 itself has several internally threaded holes, and the connecting screw 402 is arranged in conjunction with the internally threaded holes, and one end of the connecting screw 402 can be threadedly connected to the internally threaded holes. Using the internally threaded holes of the propeller shaft 2 for connection can effectively avoid adding structure to the propeller shaft 2, thereby ensuring that the present invention will not affect the propeller shaft 2 after use.

[0040] The first driving structure 30 is an ultra-thin hydraulic jack, and the output end of the first driving structure 30 can contact the blade shaft 2 to drive the blade shaft 2. The ultra-thin hydraulic jack can be an ultra-thin hydraulic jack in the prior art that can achieve the functions of the utility model, that is, a type of hydraulic jack.

[0041] The second drive structure 400 is a hollow hydraulic jack, which is sleeved on the connecting screw 402. The output end of the second drive structure 400 can contact the mounting assembly 10, and the other end can contact the fixed plate 403. The hollow hydraulic jack can be a hollow hydraulic jack in the prior art that can achieve the functions of the present utility model, that is, a type of hydraulic jack.

[0042] Among them, as a further preferred embodiment, the hollow hydraulic jacks use the same hydraulic oil pump station, and a pair of hollow hydraulic jacks are simultaneously controlled by a three-way valve. Using the same hydraulic oil pump station can effectively control the pair of hollow hydraulic jacks to extend simultaneously and to the same extension amount, thereby avoiding deviations in measured values ​​due to different extension amounts.

[0043] like Figure 2As shown, in order to facilitate the installation of the first drive structure 30, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the installation component 10 includes a mounting plate 100 and a plurality of fixing members 101, and the plurality of fixing members 101 are cooperatively arranged on the outside of the mounting plate 100. One end of the plurality of fixing members 101 is fixedly connected to the mounting plate 100, and the other end can be detachably connected to the wheel body 1.

[0044] A curved mounting seat 102 is provided on one side of the mounting plate 100 , and the first driving structure 30 can be installed in the curved mounting seat 102 .

[0045] During use, the first driving structure 30 can be installed in the arc-shaped mounting seat 102 . Meanwhile, during use, the mounting plate 100 can also support the first driving structure 30 .

[0046] like Figures 2 to 4 As shown in the figure, only four fixing members 101 are taken as an example. In order to facilitate the connection between the mounting assembly 10 and the rotor body 1, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the number of fixing members 101 is two or four. When the number of fixing members 101 is two, the two fixing members 101 are respectively located on both sides of the mounting plate 100. When the number of fixing members 101 is four, the four fixing members 101 are arranged on the mounting plate 100 in a circular array around the circumference of the mounting plate 100.

[0047] The fixing member 101 includes an arc-shaped fixing block 103 and a pair of connecting rods 104. One end of the pair of connecting rods 104 is fixedly connected to the mounting plate 100, and the other end is fixedly connected to the arc-shaped fixing block 103. There is a clearance slot 105 between the pair of connecting rods 104. One end of the connecting screw 402 can pass through the clearance slot 105 and be threadedly connected to the blade shaft 2. The connecting screw 402 and the clearance slot 105 are loosely matched. The arc-shaped fixing block 103 and the rotor body 1 can be detachably connected by bolts.

[0048] like Figure 1 As shown, it should be noted that the wheel body 1 itself has several internal threaded holes. It is only necessary to set internal threaded holes that match the internal threaded holes on the wheel body 1 on the arc-shaped fixing block 103, and then connect the two with bolts to complete the connection between the installation component 10 and the wheel body 1.

[0049] During use, the number of the fixing members 101 can be set according to actual needs, and two or four fixing members 101 can be connected to the wheel body 1.

[0050] like Figure 4As shown, in order to facilitate the installation of the second drive structure 400 and the positioning of the connecting screw 402, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that a pair of connecting rods 104 are provided with a circular fixing block 106, and the circular fixing block 106 is fixedly connected to the pair of connecting rods 104. A through hole 107 is provided on the circular fixing block 106, and the through hole 107 is matched with the clearance slot 105. One end of the connecting screw 402 can pass through the through hole 107 and is gap-matched with the through hole 107. One end of the second drive structure 400 is in contact with the circular fixing block 106, and the other end can be in contact with the fixed disk 403.

[0051] An arc-shaped placement platform 108 that cooperates with the second driving structure 400 is provided on the circular fixing block 106 , and the second driving structure 400 can be placed on the arc-shaped placement platform 108 .

[0052] It should be noted that the through hole 107 is arranged in conjunction with the internal threaded hole on the blade shaft 2 to facilitate the positioning of the connecting screw 402. At the same time, the setting of the circular fixing block 106 and the arc-shaped placement platform 108 can facilitate the installation and use of the second drive structure 400.

[0053] like Figure 4 As shown, in order to facilitate the installation and use of the dial indicator 20, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the dial indicator 20 includes a dial body 200 and a magnetic dial base 201 for mounting the dial body 200. The dial body 200 can be mounted on the magnetic dial base 201, and the magnetic dial base 201 can be mounted on the rotor body 1.

[0054] Among them, the dial indicator 20 can adopt the combined structure of the meter body 200 and the magnetic meter base 201 in the prior art. One end of the measuring rod on the meter body 200 can contact the blade shaft 2. The installation and adjustment of the meter body 200 can be quickly completed through the magnetic meter base 201, thereby facilitating the measurement of the displacement distance of the blade shaft 2, thereby obtaining the blade movement amount.

[0055] Working principle of this utility model:

[0056] During use, the device for measuring the amount of blade movement of a cross-flow unit described in the present invention is installed on the impeller body 1, and then the blade shaft 2 is driven by the first drive structure 30 to reset the blade shaft 2. At this time, the blade shaft 2 is in the initial position, that is, the position where no movement occurs. Then the dial indicator 20 is adjusted to zero. After zeroing, the first drive structure 30 is loosened (it should be noted that be careful not to touch the dial indicator during the loosening process). Then the connecting screw 402 is screwed into the blade shaft 2, and then one end of the second drive structure 400 is contacted with the mounting assembly 10. Then the fixed plate 403 is moved so that it contacts the other end of the second drive structure 400 and is locked by the locking nut 404 and contacts the blade shaft 2. Then the fixed plate 403 is driven by the second drive structure 400 to pull the connecting screw 402, and then pull the blade shaft 2 to move it back to the position after the movement occurs. At this time, the reading obtained by the dial indicator 20 is the amount of blade movement.

[0057] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A device for measuring the amount of blade movement of a tubular turbine, characterized in that: include: A mounting assembly (10), the mounting assembly (10) being mountable on the rotor body (1); A dial indicator (20) can be mounted on the runner body (1) and is used to measure the amount of blade movement; A first driving structure (30), the first driving structure (30) is arranged on one side of the mounting assembly (10), one end of the first driving structure (30) can contact the blade shaft (2) and is used to drive the blade shaft (2); A second drive assembly (40), the second drive assembly (40) comprising a pair of second drive structures (400) and a pair of connecting members (401), the pair of connecting members (401) being cooperatively arranged at two ends of the other side of the mounting assembly (10), the pair of second drive structures (400) being respectively cooperatively arranged with the pair of connecting members (401) for driving the connecting members (401); The connecting member (401) includes a connecting screw (402), a fixing plate (403) and a locking nut (404); one end of the connecting screw (402) is threadedly connected to the blade shaft (2); the fixing plate (403) is sleeved on the connecting screw (402); the locking nut (404) is sleeved on the other end of the connecting screw (402) and is threadedly connected to the connecting screw (402); the locking nut (404) is located on one side of the fixing plate (403) and is used to limit the movement of the fixing plate (403); one end of the second driving structure (400) contacts the mounting assembly (10), and the other end contacts the other side of the fixing plate (403).

2. The device for measuring blade movement of a tubular turbine according to claim 1, characterized in that: The first driving structure (30) is an ultra-thin hydraulic jack, and the output end of the first driving structure (30) can be in contact with the blade shaft (2) to drive the blade shaft (2).

3. The device for measuring blade movement of a tubular turbine according to claim 2, characterized in that: The second driving structure (400) is a hollow hydraulic jack. The second driving structure (400) is sleeved on the connecting screw (402). The output end of the second driving structure (400) can contact the mounting assembly (10), and the other end can contact the fixed disk (403).

4. The device for measuring blade movement of a tubular turbine according to claim 3, characterized in that: The mounting assembly (10) comprises a mounting plate (100) and a plurality of fixing members (101). The plurality of fixing members (101) are cooperatively arranged on the outside of the mounting plate (100). One end of the plurality of fixing members (101) is fixedly connected to the mounting plate (100), and the other end is detachably connected to the rotating wheel body (1).

5. The device for measuring the amount of blade movement of a tubular turbine according to claim 4, characterized in that: An arc-shaped mounting seat (102) is provided on one side of the mounting plate (100), and the first driving structure (30) can be mounted in the arc-shaped mounting seat (102).

6. The device for measuring the amount of blade movement of a tubular turbine according to claim 5, characterized in that: The number of the fixing members (101) is two or four. When the number of the fixing members (101) is two, the two fixing members (101) are respectively located on both sides of the mounting plate (100). When the number of the fixing members (101) is four, the four fixing members (101) are arranged on the mounting plate (100) in a circular array along the circumference of the mounting plate (100).

7. The device for measuring the amount of blade movement of a tubular turbine according to claim 6, characterized in that: The fixing member (101) comprises an arc-shaped fixing block (103) and a pair of connecting rods (104). One end of the pair of connecting rods (104) is fixedly connected to the mounting plate (100), and the other end is fixedly connected to the arc-shaped fixing block (103). A clearance notch (105) is provided between the pair of connecting rods (104). One end of the connecting screw (402) can pass through the clearance notch (105) and be threadedly connected to the blade shaft (2). The connecting screw (402) and the clearance notch (105) are clearance-matched. The arc-shaped fixing block (103) and the rotor body (1) can be detachably connected by bolts.

8. The device for measuring the amount of blade movement of a tubular turbine according to claim 7, characterized in that: A circular fixing block (106) is provided on a pair of connecting rods (104), and a through hole (107) is provided on the circular fixing block (106). The through hole (107) is matched with the clearance notch (105). One end of the connecting screw (402) can pass through the through hole (107) and is clearance-matched with the through hole (107). One end of the second driving structure (400) contacts the circular fixing block (106), and the other end can contact the fixed disk (403).

9. The device for measuring blade movement of a tubular turbine according to claim 8, characterized in that: An arc-shaped placement platform (108) coordinated with the second driving structure (400) is provided on the circular fixed block (106), and the second driving structure (400) can be placed on the arc-shaped placement platform (108).

10. The device for measuring blade movement of a tubular turbine according to claim 9, characterized in that: The dial indicator (20) comprises a dial body (200) and a magnetic dial base (201) for mounting the dial body (200). The dial body (200) can be mounted on the magnetic dial base (201), and the magnetic dial base (201) can be mounted on the rotating wheel body (1).

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