CN219531917U - Horizontal-maintenance-free circle measuring device for generator stator of hydroelectric generating set - Google Patents

Abstract

The utility model discloses a horizontal circle measuring-free device for overhauling a generator stator of a hydroelectric generating set, which comprises a base, an upright post and a stator circle measuring assembly arranged on the upright post, wherein a plurality of horizontal coaxial adjusting mechanisms are arranged around the base, each horizontal coaxial adjusting mechanism comprises a bottom plate and a bracket arranged on the bottom plate, the base is connected with the bottom plate through a connecting piece, the upper end of the bracket extends out of the upper side of the base, a radial adjusting jackscrew arranged along the horizontal direction is arranged on the bracket, the inner side end surface of the radial adjusting jackscrew is contacted with the outer wall of the base for adjusting the coaxiality of the base, an axial adjusting jackscrew arranged along the vertical direction is arranged on the part of the bracket extending out of the upper side of the base, and the lower side end surface of the axial adjusting jackscrew is contacted with the top surface of the base for adjusting the levelness of the base. Compared with the traditional stator roundness measuring mode and tool, the stator levelness can be accurately adjusted without the stator level adjustment, and manpower, material resources and time required by maintenance can be saved.

Description

Horizontal-maintenance-free circle measuring device for generator stator of hydroelectric generating set

Technical Field

The utility model relates to the technical field of maintenance of hydraulic generators, in particular to a horizontal circle measuring-free device for maintenance of a hydraulic generator set generator stator.

Background

After the stator overhaul is completed in the hydropower plant, roundness measurement is required to be carried out on the stator body; traditional stator survey mode and instrument must carry out the accurate adjustment to the levelness of stator before measuring because the design reason, and because the stator body weight is big let survey circle frame and stator concentricity adjustment process loaded down with trivial details for maintenance efficiency is low.

Disclosure of Invention

The utility model aims to solve the technical problems: aiming at the problems in the prior art, the utility model provides a horizontal roundness measuring device for overhauling a stator of a hydroelectric generating set, which is suitable for carrying out stator roundness measurement on the stator after overhauling the hydroelectric generating set, and avoids uneven gaps between the stator and the rotor caused by irregular shapes of the stator, so that irregular magnetic pulling force is generated in the running process of the set, the running vibration of the set is increased, and the running working condition of the set is seriously influenced. The method is suitable for roundness measurement after stator overhaul of all hydropower plants. Compared with the traditional stator roundness measuring mode and tool, the stator levelness can be accurately adjusted without the stator level adjustment, and manpower, material resources and time required by maintenance can be saved.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a hydroelectric set generator stator overhauls and exempts from level survey circle device, includes base, stand and locates the stator survey circle subassembly of stand, be equipped with a plurality of level coaxial adjustment mechanism all around of base, level coaxial adjustment mechanism includes the bottom plate and locates the support on the bottom plate, the base passes through the connecting piece and is connected with the bottom plate, the upper end of support stretches out the upside of arranging in the base, the support be equipped with along the radial adjustment jackscrew that the horizontal direction was arranged, the inboard terminal surface and the base outer wall contact of radial adjustment jackscrew are in order to be used for adjusting the axiality of base, the support stretches out the part of arranging in the upside of base and is equipped with along the axial adjustment jackscrew that vertical direction was arranged, the downside terminal surface of axial adjustment jackscrew is in order to be used for adjusting the levelness of base with the top surface contact of base.

Optionally, the stator circle measuring assembly is sleeved on the upright post and can slide along the upright post, a fixed pulley is arranged at the top of the upright post, a hoisting mechanism is arranged on the base, and a cable is connected to the stator circle measuring assembly and is connected to the hoisting mechanism through the fixed pulley so as to be used for adjusting the height of the stator circle measuring assembly.

Optionally, the stand is hollow structure, and the inside take-up pulley that is equipped with of hollow structure, the hawser of stator survey circle subassembly is drawn forth from the opening part of stand bottom lateral wall behind fixed pulley, the hollow structure inner chamber of stand, take-up pulley and is connected on hoist mechanism.

Optionally, a plurality of lugs are arranged around the stator circle measuring assembly, the number of the fixed pulleys at the top of the upright post is in one-to-one correspondence with the lugs, each lug is connected to a connecting hook inside the upright post through a cable after passing through the corresponding fixed pulley, and the connecting hook is connected to a hoisting mechanism through a public cable after passing through a tensioning wheel.

Optionally, the stator circle measuring assembly comprises a central body, the central body is sleeved and installed on the upright post, and the central body is provided with counterweight arms symmetrically arranged around the axis of the central body and measuring arms for installing a circle measuring instrument.

Optionally, the end of the measuring arm is provided with a telescopic rod which can be telescopic along the horizontal direction to adjust the measuring radius of the circle measuring instrument in the horizontal direction.

Optionally, the end of the telescopic rod is provided with a meter frame for installing a circle measuring instrument.

Optionally, the table frame includes pivot, table connecting seat and intermediate junction body, link to each other through the intermediate junction body between pivot and the table connecting seat, pivot movable mounting just can rotate relative telescopic link in the through-hole of telescopic link's tip.

Optionally, a diagonal bracket is connected between the center body and both the counterweight arm and the measuring arm.

Optionally, the cable-stayed bracket is of a hollowed right triangle structure, one right-angle side is fixedly connected with the central body, and the other right-angle side is fixedly connected with the counterweight arm or the measuring arm.

Compared with the prior art, the utility model has the following advantages: the horizontal coaxial adjusting mechanism comprises a bottom plate and a bracket arranged on the bottom plate, wherein the base is connected with the bottom plate through a connecting piece, the upper end of the bracket extends out of the upper side of the base, a radial adjusting jackscrew which is arranged along the horizontal direction is arranged on the bracket, the inner side end surface of the radial adjusting jackscrew is contacted with the outer wall of the base for adjusting the coaxiality of the base, an axial adjusting jackscrew which is arranged along the vertical direction is arranged on the part of the bracket which extends out of the upper side of the base, and the lower side end surface of the axial adjusting jackscrew is contacted with the top surface of the base for adjusting the levelness of the base; the higher the roundness of the stator is, the more uniform the air gap between the stator and the rotor is, which is more beneficial to ensuring the long-term stable operation of the generator and improving the economic benefit of the power plant.

Drawings

Fig. 1 is a schematic diagram of a device structure according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a partial enlarged structure of a region a in fig. 1.

Fig. 3 is an enlarged schematic view of the structure of the form in the embodiment of the present utility model.

Fig. 4 is a schematic structural diagram of an operation state of the device according to an embodiment of the present utility model.

Legend description: 1. a base; 2. a column; 21. a fixed pulley; 22. a tensioning wheel; 23. a connecting hook; 3. a stator rounding assembly; 30. lifting lugs; 31. a central body; 32. a counterweight arm; 33. a measuring arm; 34. a telescopic rod; 35. a watch stand; 351. a rotating shaft; 352. a watch connecting seat; 353. an intermediate connector; 36. a cable-stayed bracket; 4. a horizontal coaxial adjustment mechanism; 41. a bottom plate; 42. a bracket; 43. radially adjusting the jackscrews; 44. axially adjusting the jackscrews; 5. and a hoisting mechanism.

Detailed Description

As shown in fig. 1 and 2, this embodiment provides a hydroelectric generating set generator stator overhauls and exempts from horizontal survey circle device, including base 1, stand 2 and locate the stator survey circle subassembly 3 of stand 2, be equipped with a plurality of horizontal coaxial adjustment mechanism 4 around the base 1, horizontal coaxial adjustment mechanism 4 includes bottom plate 41 and locates the support 42 on the bottom plate 41, base 1 passes through the connecting piece and is connected with bottom plate 41, the upper end of support 42 stretches out and arranges in the upside of base 1, be equipped with radial adjustment jackscrew 43 that arrange along the horizontal direction of support 42, radial adjustment jackscrew 43's inboard terminal surface and base 1 outer wall contact are in order to be used for adjusting the axiality of base 1, the support 42 stretches out the portion of arranging in the upside of base 1 and is equipped with along the axial adjustment jackscrew 44 that vertical direction arranged, the downside terminal surface of axial adjustment jackscrew 44 and the top surface contact of base 1 are in order to be used for adjusting the levelness of base 1.

In order to achieve circle measurement of the height positions of the stators of the generators of different hydro-generator sets, as shown in fig. 1, the stator circle measurement assembly 3 of the embodiment is sleeved on the upright post 2 and can slide along the upright post 2, a fixed pulley 21 is arranged at the top of the upright post 2, a hoisting mechanism 5 is arranged on the base 1, a cable is connected to the stator circle measurement assembly 3, and the cable is connected to the hoisting mechanism 5 through the fixed pulley 21 so as to be used for adjusting the height of the stator circle measurement assembly 3. The winding mechanism 5 mainly includes a winding drum and a winding motor that drives the winding drum.

As shown in fig. 1, the upright post 2 of the embodiment is of a hollow structure, the tensioning wheel 22 is arranged in the hollow structure, and the cable of the stator circle measuring assembly 3 is led out from the opening of the side wall of the bottom of the upright post 2 through the fixed pulley 21, the hollow structure inner cavity of the upright post 2 and the tensioning wheel 22 and then is connected to the hoisting mechanism 5, so that the cable of the stator circle measuring assembly 3 can be effectively protected through the structure, the reliability of the device is more reliable, and the device is safer and more reliable.

As shown in fig. 1, a plurality of lifting lugs 30 are arranged around the stator circle measuring assembly 3 in this embodiment, the number of fixed pulleys 21 at the top of the upright post 2 is in one-to-one correspondence with the lifting lugs 30, each lifting lug 30 is connected to a connecting hook 23 inside the upright post 2 after passing through the corresponding fixed pulley 21 through a cable, the connecting hooks 23 are connected to the hoisting mechanism 5 after passing through the tensioning wheel 22 through a public cable, and the mode that the plurality of lifting lugs 30 are connected to the connecting hooks 23 together can enable the stator circle measuring assembly 3 to suspend stress uniformly and reliably and prevent the stator circle measuring assembly 3 from being inclined unevenly so as to influence detection accuracy.

As shown in fig. 1, the stator circle measuring assembly 3 of this embodiment includes a central body 31, the central body 31 is sleeved and mounted on the upright post 2, the central body 31 is provided with counterweight arms 32 symmetrically arranged around the axis of the central body 31 and measuring arms 33 for mounting a circle measuring instrument, by the above structure, the left and right sides are balanced in gravity, and the stator circle measuring assembly 3 is prevented from being inclined due to uneven stress so as to affect the detection accuracy.

As shown in fig. 1, the end of the measuring arm 33 of the present embodiment is provided with a telescopic rod 34 that can be extended and retracted in the horizontal direction to adjust the measuring radius of the round measuring instrument in the horizontal direction, the telescopic rod 34 includes an outer tube and an inner tube inserted into the outer tube, the outer tube is fixed to the measuring arm 33, and the inner tube is used for installing the round measuring instrument. Furthermore, a fastening screw or other locking structure may be mounted on the outer tube as needed, so that the outer tube may be locked after the telescoping formation is adjusted to prevent the telescoping rod 34 from changing travel to affect measurement accuracy.

As shown in fig. 1, the end of the telescopic link 34 of the present embodiment is provided with a gauge stand 35 for mounting a circle measuring instrument, so that the circle measuring instrument (in this embodiment, a dial indicator) can be easily detached.

As shown in fig. 3, the table frame 35 in this embodiment includes a rotating shaft 351, a table connecting seat 352 and an intermediate connector 353, the rotating shaft 351 and the table connecting seat 352 are connected by the intermediate connector 353, the rotating shaft 351 is movably mounted in a through hole at an end of the telescopic rod 34 and can rotate relative to the telescopic rod 34, and by the above convenience, the angle of the rotating shaft 351 can be conveniently adjusted, so that the circle measuring instrument has a certain adjusting space (taking the table connecting seat 352 as a radius).

In order to improve the structural strength between the center body 31 and both the weight arm 32 and the measuring arm 33, as shown in fig. 1, a diagonal bracket 36 is connected between the center body 31 and both the weight arm 32 and the measuring arm 33 of the present embodiment.

As shown in fig. 1, the diagonal bracket 36 of the present embodiment is a hollow right triangle structure, and one right-angle side is fixedly connected with the central body 31, and the other right-angle side is fixedly connected with the counterweight arm 32 or the measuring arm 33.

Referring to fig. 4, the method for using the horizontal circle measuring device for overhauling the generator stator of the hydro-generator set in this embodiment is as follows: (1) centering of the device: measuring the distance between the finished surface at the lower end of the hydroelectric generator stator (indicated by a two-dot chain line in fig. 4) and the axial center of the horizontal circle measuring device for overhauling the hydroelectric generator stator of the embodiment, and when the distances between the lower directions and the axial center are equal, indicating that the horizontal circle measuring device for overhauling the hydroelectric generator stator of the embodiment is concentric with the stator body, fixing the radial adjusting jackscrew 43. (2) device coaxiality adjustment: measuring the distance between the finish machining surface at the upper end of the stator and the center of the shaft of the horizontal circle measuring device for overhauling the stator of the hydro-generator set of the embodiment, adjusting the coaxiality of the circle measuring device through an axial adjusting jackscrew 44, and when the distances between the shaft and the upper end of the stator are equal, proving that the horizontal circle measuring device for overhauling the stator of the hydro-generator set of the embodiment is coaxial with the center of the stator, and fixing the axial adjusting jackscrew 44; and (3) coaxiality rechecking: and checking the distances between the upper and lower finishing surfaces of the stator and the shaft center of the horizontal circle measuring device for overhauling the stator of the hydroelectric generating set, and if the distances are equal, proving that the horizontal circle measuring device for overhauling the stator of the hydroelectric generating set is completely coaxial with the stator. (4) stator roundness measurement: setting a dial indicator (circle measuring instrument) on the meter connecting seat 352, aligning the finish machining surface at the lower end of the stator to zero after the counterweight step is finished, winding the finish machining surface at the lower end of the stator for one circle, recording data, and checking whether the change of the dial indicator is in a required range; after the lower end measurement is completed, the stator rounding assembly 3 is slowly lifted up through the winding mechanism 5, for example, the stator rounding assembly is lifted up from a dotted line position shown in fig. 4 to a position shown by a solid line, the measuring arm 33 is aligned to the finish machining surface of the upper end of the stator and then winds the finish machining surface of the upper end of the stator for one circle, data are recorded, and whether the change of the dial indicator is within a reasonable range is checked; and if the data of the upper and lower end dial indicators meet the requirements, the roundness of the stator meets the operational level.

In conclusion, the method does not need to accurately adjust the levelness of the stator when measuring the roundness, and can rapidly realize the coaxial adjustment with the stator through the self-contained coaxial adjusting mechanism; and the measurement of the upper measuring point and the lower measuring point of the measuring arm is driven by a motor, so that the quick adjustment of the measuring point can be realized, and the time required by manually adjusting the measuring point is saved. The utility model can ensure that the roundness of the stator after maintenance can meet the design requirement, and avoid the problems that unbalanced magnetic tension is generated in the running process of the generator and the running vibration of the unit is increased due to unbalanced air gap between the stator and the rotor of the generator caused by the fact that the roundness of the stator does not reach the standard.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims (10)

1. The utility model provides a hydroelectric set generator stator overhauls and exempts from level survey circle device, its characterized in that, including base (1), stand (2) and locate stator survey circle subassembly (3) of stand (2), be equipped with a plurality of level coaxial adjustment mechanism (4) around base (1), level coaxial adjustment mechanism (4) include bottom plate (41) and locate support (42) on bottom plate (41), base (1) are connected with bottom plate (41) through the connecting piece, the upper end of support (42) stretches out and arranges in the upside of base (1), be equipped with radial adjustment jackscrew (43) of arranging along the horizontal direction of support (42), the inboard terminal surface of radial adjustment jackscrew (43) is in order to be used for adjusting the axiality of base (1) with base (1) outer wall contact, the part that support (42) stretches out and arrange in the upside of base (1) is equipped with along the axial adjustment jackscrew (44) of vertical direction arrangement, the downside terminal surface of axial adjustment jackscrew (44) is in order to be used for adjusting the levelness of base (1) with the top surface contact of base (1).

2. The horizontal rounding device for overhauling stator of generator set according to claim 1, wherein the stator rounding assembly (3) is sleeved on the upright post (2) and can slide along the upright post (2), a fixed pulley (21) is arranged at the top of the upright post (2), a hoisting mechanism (5) is arranged on the base (1), a cable is connected to the stator rounding assembly (3) and is connected to the hoisting mechanism (5) through the fixed pulley (21) for adjusting the height of the stator rounding assembly (3).

3. The horizontal testing-free device for overhauling the generator stator of the hydroelectric generating set according to claim 2 is characterized in that the upright post (2) is of a hollow structure, a tensioning wheel (22) is arranged in the hollow structure, and a cable of the stator testing-round assembly (3) is led out from an opening of the side wall at the bottom of the upright post (2) through a fixed pulley (21), an inner cavity of the hollow structure of the upright post (2) and the tensioning wheel (22) and then is connected to a hoisting mechanism (5).

4. The horizontal rounding device is free of maintenance for the generator stator of the hydroelectric generating set according to claim 3, wherein a plurality of lifting lugs (30) are arranged around the stator rounding assembly (3), the number of the fixed pulleys (21) at the top of the upright post (2) corresponds to that of the lifting lugs (30) one by one, each lifting lug (30) is connected to a connecting hook (23) inside the upright post (2) through a cable after passing through the corresponding fixed pulley (21), and the connecting hook (23) is connected to a hoisting mechanism (5) through a public cable after passing through a tensioning wheel (22).

5. The maintenance-free horizontal roundness measuring device for the generator stator of the hydroelectric generating set according to any one of claims 1 to 4, wherein the stator roundness measuring assembly (3) comprises a central body (31), the central body (31) is sleeved and installed on the upright post (2), and the central body (31) is provided with counterweight arms (32) symmetrically arranged around the axis of the central body (31) and measuring arms (33) for installing a roundness measuring instrument.

6. The maintenance-free horizontal rounding device for the generator stator of the hydro-generator set according to claim 5, wherein the end part of the measuring arm (33) is provided with a telescopic rod (34) which can be telescopic along the horizontal direction to adjust the radius of the rounding instrument measured along the horizontal direction.

7. The maintenance-free horizontal roundness measuring device for the generator stator of the hydro-generator set according to claim 6, wherein the end part of the telescopic rod (34) is provided with a meter frame (35) for installing a roundness measuring meter.

8. The hydroelectric set generator stator overhauling horizontal rounding device according to claim 7, wherein the meter frame (35) comprises a rotating shaft (351), a meter connecting seat (352) and an intermediate connector (353), the rotating shaft (351) and the meter connecting seat (352) are connected through the intermediate connector (353), and the rotating shaft (351) is movably arranged in a through hole at the end part of the telescopic rod (34) and can rotate relative to the telescopic rod (34).

9. The hydroelectric generating set generator stator overhaul horizontal-free roundness measuring device according to claim 8, wherein a diagonal bracket (36) is connected between the counterweight arm (32) and the measuring arm (33) and the central body (31).

10. The horizontal roundness measuring device for overhauling of a generator stator of a hydroelectric generating set according to claim 9, wherein the inclined-pull bracket (36) is of a hollowed right triangle structure, one right-angle side is fixedly connected with the central body (31), and the other right-angle side is fixedly connected with the counterweight arm (32) or the measuring arm (33).