CN209986268U

CN209986268U - Balance hole processing equipment of steam turbine rotor

Info

Publication number: CN209986268U
Application number: CN201920501033.2U
Authority: CN
Inventors: 赵贵虎
Original assignee: Lide Power Equipment (zhejiang) Co Ltd
Current assignee: Lide Power Equipment (zhejiang) Co Ltd
Priority date: 2019-04-13
Filing date: 2019-04-13
Publication date: 2020-01-24
Anticipated expiration: 2029-04-13

Abstract

The utility model discloses a balance hole processing equipment of steam turbine rotor belongs to steam turbine rotor processing equipment, and its technical scheme main points are: the positioning mechanism comprises two positioning wheels which are rotatably connected to the upper ends of the supporting frames, a gap is reserved between the two positioning wheels, and the axes of the four positioning wheels connected to the adjacent supporting frames are overlapped in pairs; the drilling machine is characterized in that a driving device is arranged on the ground, the driving device is connected with a drilling mechanism, the drilling mechanism comprises a plurality of extension bars, a plurality of connecting rods for connecting adjacent extension bars and a drill bit connected with the extension bars, and one end of each connecting rod can be connected with the driving device. The utility model discloses a rational in infrastructure utilizes supporting mechanism to fix a position the rotor, and later usable drilling mechanism directly carries out the processing in balancing hole.

Description

Balance hole processing equipment of steam turbine rotor

Technical Field

The utility model belongs to steam turbine rotor processing equipment, more specifically say, it relates to a balance hole processing equipment of steam turbine rotor.

Background

The steam turbine set rotor is a steam turbine core component, the rotor needs to bear high temperature, high pressure and high tensile stress, wherein the axial thrust of high-pressure steam to the rotor is very large, if the steam is blown to an impeller completely, one side is high pressure, and the other side is atmospheric pressure, so that the rotor is easy to generate axial displacement.

The rotor of steam turbine is at the operation in-process, and steam blows at the impeller rim plate, and the rotor can receive the backward thrust that steam was applyed, can make the thrust shaft bear great axial thrust this moment, and in order to reduce the axial thrust that the rotor received at the operation in-process, a plurality of balance holes can be seted up at its moving blade seat terminal surface circumference to the rotor in process of production, because the axial length of rotor is longer, uses ordinary drill bit to be difficult to directly process the balance hole.

Therefore, a new technical solution is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a not enough to prior art exists, the utility model aims to provide a balance hole processing equipment of steam turbine rotor can directly process the balance hole on the rotor.

In order to achieve the above purpose, the utility model provides a following technical scheme: the balance hole processing equipment for the steam turbine rotor comprises a plurality of supporting frames, wherein the supporting frames are connected with positioning mechanisms for positioning the rotor, each positioning mechanism comprises two positioning wheels which are rotatably connected to the upper ends of the supporting frames, a gap is reserved between the two positioning wheels, and the axes of the four positioning wheels connected to the adjacent supporting frames are overlapped in pairs; the drilling machine is characterized in that a driving device is arranged on the ground, the driving device is connected with a drilling mechanism, the drilling mechanism comprises a plurality of extension bars, a plurality of connecting rods for connecting adjacent extension bars and a drill bit connected with the extension bars, and one end of each connecting rod can be connected with the driving device.

Through adopting above-mentioned technical scheme, when driling the rotor, arrange adjacent locating wheel upper end in with the rotor, later connect connecting rod, extension bar and drill bit, utilize drive arrangement to drive drilling mechanism and rotate, can directly carry out the processing in balanced hole.

The utility model discloses further set up to: the equal fixedly connected with in connecting rod both ends is the extension rod of round platform shape, the extension rod is kept away from the diameter of connecting rod and is less than its diameter of being close to the connecting rod, the equal fixedly connected with connecting block of one end that the connecting rod was kept away from to the extension rod, extension rod both ends all seted up with extension rod complex extending groove, the diameter of extending groove opening part is greater than the diameter of its terminal surface, the spread groove has been seted up to the extending groove terminal surface, the extension rod outer wall can with extending groove inner wall butt, the connecting block can be arranged in the spread groove.

Through adopting above-mentioned technical scheme, can be directly insert the extension rod in the extension bar when connecting rod and extension rod, utilize the cooperation between extension bar and the extension rod to make extension rod and connecting rod connect this moment, utilize the cooperation of connecting block and spread groove to make and can not take place relative rotation between extension bar and the connecting rod, no longer need use other instrument when connecting to it is more convenient to make the use of drilling mechanism.

The utility model discloses further set up to: the connecting rod lateral wall runs through there is the exhaust hole, exhaust hole and spread groove intercommunication.

Through adopting above-mentioned technical scheme, utilize the air escape of exhaust hole in with the extension bar, when connecting extension bar and connecting rod, the air in the extension bar can not exert the power towards extension bar opening direction because of the compression to the extension bar to the use that makes extension bar and connecting rod is more stable.

The utility model discloses further set up to: the rotor is connected with a plurality of guiding mechanism that lead to drilling mechanism, guiding mechanism includes the guide block of two amalgamations, with the fixed fastening bolt of guide block and fastening nut, two the guide block can be jointly with the rotor centre gripping, fastening bolt passes two guide blocks simultaneously and with fastening nut threaded connection, the equal circumference of guide block terminal surface runs through there are a plurality of guiding holes, drilling mechanism can follow the guiding hole and pass.

By adopting the technical scheme, the axis of the drilling mechanism is limited by the guide mechanism, so that the axis of the drilling mechanism coincides with the axis of the rotor when the drilling mechanism drills, and the precision of the machined balance hole can be ensured.

The utility model discloses further set up to: the positioning mechanism further comprises a positioning block, two positioning rods are fixedly connected to the upper end of the support frame and are respectively located on two sides of the positioning wheel, the positioning rods can penetrate through the positioning block, and the lower end of the positioning block can be abutted to the upper end of the rotor.

By adopting the technical scheme, the positioning block is utilized to apply downward pressure to the drill, so that the friction force between the rotor and the positioning block is increased, the rotor is not easy to rotate, and the machining process of the balance hole is kept stable.

The utility model discloses further set up to: two equal threaded connection of locating lever has set nut, set nut lower extreme can with locating piece upper end butt.

By adopting the technical scheme, the positioning blocks are utilized to apply downward pressure to the rotor, so that the friction force between the rotor and the positioning blocks is increased, the rotor is not easy to rotate, and the processing process of the balance hole is kept stable.

The utility model discloses further set up to: the upper end of the positioning frame farthest from the driving device is connected with an index plate, and the index plate is connected with the rotor.

Through adopting above-mentioned technical scheme, utilize set nut to exert decurrent pressure to the fastening block to increased the pressure of locating piece and rotor, increased the frictional force between rotor and the locating piece, made the difficult emergence rotation of rotor in the course of working.

The utility model discloses further set up to: and guide sleeves are arranged in the guide holes.

Through adopting above-mentioned technical scheme, utilize the uide bushing to reduce the frictional force between guiding hole, extension bar and the connecting rod, reduced the wearing and tearing of connecting rod and extension bar, make guiding mechanism and drilling mechanism's use remain stable.

To sum up, the utility model discloses following beneficial effect has:

1. the utility model utilizes the positioning mechanism to limit the position of the rotor, and then the drilling mechanism can be directly utilized to process the balance hole;

2. the extension bar is connected with the connecting rod through the matching between the extensible grooves of the extension block, and other tools are not needed when the extension bar is connected with the connecting rod, so that the drilling mechanism is more convenient to use;

3. the axis position of the drilling mechanism is limited by arranging the guide mechanism, so that the axis of the drilling mechanism can be kept parallel to the axis of the rotating shaft, and the precision of the processed balance hole can be kept accurate.

Drawings

FIG. 1 is a perspective view of the present embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic view of the present embodiment showing a drilling mechanism;

fig. 4 is an enlarged view of a portion B of fig. 1.

Description of the drawings: 1. a support frame; 11. a drive device; 12. an index plate; 13. a three-jaw chuck; 2. a positioning mechanism; 21. positioning wheels; 22. positioning blocks; 23. positioning a rod; 24. positioning a nut; 3. a drilling mechanism; 31. lengthening a rod; 311. an extension groove; 312. connecting grooves; 313. an exhaust hole; 32. a connecting rod; 321. an extension rod; 322. connecting blocks; 33. a drill bit; 4. a guide mechanism; 41. a guide block; 411. a guide hole; 42. fastening a bolt; 43. fastening a nut; 44. and a guide sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

The utility model provides a balance hole processing equipment of steam turbine rotor, as shown in figure 1, including three support frame 1, three support frame 1 is a sharp interval and sets up, two support frame 1 upper ends in the middle of being located all are provided with the positioning mechanism 2 (see figure 2) of going on fixing a position the rotor, positioning mechanism 2 includes two locating wheels 21 of being connected with support frame 1 rotation, leave the clearance between two locating wheels 21, and two liang of coincidences of the axis of four locating wheels 21 on the adjacent support frame 1, the rotor can be arranged in on two locating wheels 21, the rotor lateral wall can be simultaneously with be located two locating wheel 21 lateral walls butt on same support frame 1. A driving device 11 is arranged on the ground, and the driving device 11 is a power head connected with the universal milling machine. The driving device 11 is connected with a drilling mechanism 3 (see fig. 3), the drilling mechanism 3 includes a plurality of extension bars 31, a plurality of connecting rods 32 connecting adjacent extension bars 31, and a drill 33 connected with the extension bars 31, one end of the connecting rod 32 can be connected with the driving device 11, and the diameters of the extension bars 31 and the connecting rods 32 are equal. When the rotor is drilled, the drill is placed at the upper end of the adjacent positioning wheel 21, then the connecting rod 32, the extension rod 31 and the drill bit 33 are connected, the driving device 11 is used for driving the drilling mechanism 3 to rotate, and the machining of the balance hole can be directly carried out.

In order to facilitate the connection between the connecting rod 32 and the extension rod 31, no other tool is required for the connection. As shown in fig. 3, the extending rod 321 in a truncated cone shape is coaxially welded at both ends of the connecting rod 32, the diameter of one end of the extending rod 321 far away from the connecting rod 32 is smaller than that of the end face close to the connecting rod 32, and the end face of the extending rod 321 far away from the connecting rod 32 is welded with the rectangular connecting block 322. Extension bar 31 is connected and is all seted up and be the extending groove 311 of round platform shape with extending rod 321 complex, and the diameter of extending groove 311 opening part is greater than the diameter of its terminal surface, and its terminal surface is seted up and is rectangular spread groove 312. The extension rod 321 can be inserted into the extension slot 311, the connection block 322 is disposed in the connection slot 312, and at this time, the side wall of the extension rod 321 abuts against the inner wall of the extension slot 311. Can directly insert extension rod 321 in the extension slot 311 when connecting rod 32 and extension rod 31, utilize the cooperation between extension slot 311 and the extension rod 321 to make extension rod 31 and connecting rod 32 connect this moment, utilize the cooperation of connecting block 322 and connecting groove 312 to make and can not take place relative rotation between extension rod 31 and the connecting rod 32, no longer need use other instrument when connecting to it is more convenient to make drilling mechanism 3's use.

As shown in fig. 3, when the extension bar 31 and the connecting rod 32 are connected, the extension bar 321 is inserted into the extension slot 311, and the extension bar 321 is tightly attached to the inner wall of the extension slot 311, so that air cannot flow away from the gap between the extension bar 321 and the extension slot 311, and the air in the extension slot 311 is compressed, and the compressed air exerts a force on the extension bar 321 in the direction of the opening of the extension slot 311, so that the connection between the extension bar 31 and the connecting rod 32 is not stable enough. Therefore, the side wall of the extension bar 31 is provided with two rectangular exhaust holes 313, and the exhaust holes 313 are respectively communicated with the connecting groove 312. Air in the extension slot 311 is discharged through the air discharge hole 313, and when the extension bar 31 and the connection rod 32 are connected, the air in the extension slot 311 does not apply a force to the extension bar 321 in the opening direction of the extension slot 311 due to compression, so that the extension bar 31 and the connection rod 32 are more stably used.

As shown in fig. 4, the drilling mechanism 3 is long, and it is difficult to ensure that the axis of the balance hole and the axis of the rotor are parallel to each other when machining the balance hole. The rotor is thus connected with several guide means 4 for guiding the drilling means 3, the guide means 4 comprising two splittable guide blocks 41, fastening bolts 42 and fastening nuts 43 for fixing the guide blocks 41. The two guide blocks 41 clamp the rotor together, and the fastening bolt 42 simultaneously penetrates through the two guide blocks 41 and is in threaded connection with the fastening nut. The equal circumference of guide block 41 terminal surface runs through has a plurality of guiding holes 411, and extension bar 31, connecting rod 32 and pivot all can pass in guiding hole 411, and connecting rod 32 and extension bar 31 all can with the inner wall butt of guiding hole 411. The guide mechanism 4 is used for limiting the axis of the drilling mechanism 3, so that the axis of the drilling mechanism 3 is superposed with the axis of the drill when drilling, and the precision of the processed balance hole can be ensured.

As shown in fig. 4, when the extension bar 31 and the connecting bar 32 are placed in the guide hole 411 and rotate, they will continuously rub against the guide hole 411 to cause wear, which will affect the limiting effect of the guide mechanism 4 on the axis of the drilling mechanism 3. Therefore, the guide holes 411 are all adhered with the guide sleeves 44, and the guide sleeves 44 are made of nylon. The guide sleeve 44 is utilized to reduce the friction force among the guide groove, the extension bar 31 and the connecting rod 32, reduce the abrasion of the connecting rod 32 and the extension bar 31 and ensure that the use process of the guide mechanism 4 and the drilling mechanism 3 is kept stable.

As shown in fig. 2, when drilling is performed, the rotation of the rotor along the axis of the rotor is not limited, and at this time, a slight rotation occurs, so that the opening accuracy of the balance holes is affected, and the distance between adjacent balance holes is changed, so that the rotation of the rotor is affected. Therefore, the positioning mechanism 2 further comprises a positioning block 22, two positioning rods 23 are welded at the upper end of the positioning frame connected with the positioning wheel 21, the positioning rods 23 are respectively located at two sides of the positioning wheel 21, the positioning rods 23 can penetrate through the positioning block 22, and the lower end of the positioning block 22 can be abutted against the side wall of the rotor. The positioning block 22 is used for applying downward pressure to the drill, so that the friction force between the rotor and the positioning block 22 is increased, the rotor is not easy to rotate, and the machining process of the balance hole is kept stable.

In order to further increase the friction between the positioning block 22 and the rotor, the rotor will not rotate during the machining process. As shown in fig. 2, positioning nuts 24 are screwed to both the two positioning rods 23, and the lower ends of the positioning nuts 24 can abut against the upper ends of the positioning blocks 22. Utilize set nut 24 to exert decurrent pressure to the fastening block to increased the pressure of locating piece 22 and rotor, increased the frictional force between rotor and the locating piece 22, make the difficult emergence of rotor in the course of working rotate.

As shown in fig. 1, since it is difficult to directly determine the rotation angle of the rotor when the balance holes are machined, the distance between the machined balance holes may be changed, which may affect the use of the rotor. Therefore, the upper end of the support frame 1 which is not connected with the positioning mechanism 2 is connected with the index plate 12, the end surface of the rotating shaft of the index plate 12 close to the support mechanism is connected with the three-jaw chuck 13 by using bolts, and the rotating shaft is clamped by the three-jaw chuck 13. The rotating angle of the rotor during the processing of the balance holes is adjusted by the index plate 12, so that the distance between the adjacent balance holes is equal, and the dynamic balance of the rotor in the moving process is not influenced.

The working principle is as follows:

the rotor is placed on the positioning wheel 21, the positioning block 22 is placed on the upper end of the rotor, the positioning nut 24 is rotated to make the lower end of the positioning nut abut against the upper end of the positioning block 22, and then the three-jaw chuck 13 is used for clamping one end of the rotor. Connect drive arrangement 11 with omnipotent milling machine, be connected extension bar 31's one end with drive arrangement 11, later connect connecting rod 32 and extension bar 31, make the turn round insert arrange extension bar 31 in keep away from drive arrangement 11's extending groove 311 in, and make drilling mechanism 3 pass guiding hole 411, start omnipotent milling machine and carry out drilling to a balance hole earlier, after the balance hole processing of accomplishing an impeller area, change the position with guiding mechanism 4 and make it install before another impeller that needs processing, continue to process next impeller. After the first balance hole is machined, the position of the dividing disc 12 at the moment is marked as a zero point, the drilling mechanism 3 is disconnected from the guide mechanism 4, the dividing disc 12 is rotated to enable the rotor to rotate for a certain angle, and the drill 33 is continuously utilized to machine the balance hole.

The specific embodiments are only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. The utility model provides a balance hole processing equipment of steam turbine rotor, includes a plurality of support frames (1), its characterized in that: the supporting frames (1) are connected with positioning mechanisms (2) for positioning the rotor, each positioning mechanism (2) comprises two positioning wheels (21) which are rotatably connected to the upper end of each supporting frame (1), a gap is reserved between the two positioning wheels (21), and the axes of the four positioning wheels (21) connected to the adjacent supporting frames (1) are overlapped in pairs; be provided with drive arrangement (11) on the ground, drive arrangement (11) are connected with drilling mechanism (3), drilling mechanism (3) include a plurality of extension bars (31), a plurality of connecting rods (32) of connecting adjacent extension bar (31) and drill bit (33) of being connected with extension bar (31), the one end of connecting rod (32) can be connected with drive arrangement (11).

2. The balance hole machining apparatus of a steam turbine rotor according to claim 1, wherein: the equal fixedly connected with in connecting rod (32) both ends is extension rod (321) of round platform shape, the diameter that connecting rod (32) were kept away from in extension rod (321) is less than its diameter that is close to connecting rod (32), the equal fixedly connected with connecting block (322) of one end that connecting rod (32) were kept away from in extension rod (321), extension rod (31) both ends are all seted up with extension rod (321) complex extension groove (311), the diameter of extension groove (311) opening part is greater than the diameter of its terminal surface, spread groove (312) have been seted up to extension groove (311) terminal surface, extension rod (321) outer wall can with extension groove (311) inner wall butt, spread groove (312) can be arranged in to connecting block (322).

3. The balance hole machining apparatus of a steam turbine rotor according to claim 2, wherein: the side wall of the connecting rod (32) is provided with an exhaust hole (313) in a penetrating manner, and the exhaust hole (313) is communicated with the connecting groove (312).

4. The balance hole machining apparatus of a steam turbine rotor according to claim 1, wherein: the rotor is connected with a plurality of guiding mechanism (4) that lead to drilling mechanism (3), guiding mechanism (4) include guide block (41) of two amalgamations, with fastening bolt (42) and fastening nut (43) that guide block (41) are fixed, two guide block (41) can be jointly with the rotor centre gripping, fastening bolt (42) pass two guide block (41) simultaneously and with fastening nut (43) threaded connection, the equal circumference of guide block (41) terminal surface has run through a plurality of guiding holes (411), drilling mechanism (3) can be followed and interior the passing of guiding hole (411).

5. The balance hole machining apparatus of a steam turbine rotor according to claim 1, wherein: positioning mechanism (2) still include locating piece (22), two locating levers (23) of equal fixedly connected with in support frame (1) upper end, locating lever (23) are located locating wheel (21) both sides respectively, locating piece (22) can be passed in locating lever (23), locating piece (22) lower extreme can with rotor upper end butt.

6. The balance hole machining apparatus of a steam turbine rotor according to claim 5, wherein: two equal threaded connection of locating lever (23) has set nut (24), set nut (24) lower extreme can with locating piece (22) upper end butt.

7. The balance hole machining apparatus of a steam turbine rotor according to claim 1, wherein: the upper end of the positioning frame farthest away from the driving device (11) is connected with an index plate (12), and the index plate (12) is connected with the rotor.

8. The balance hole machining apparatus of a steam turbine rotor according to claim 4, wherein: and guide sleeves (44) are arranged in the guide holes (411).