CN214686320U - Dismounting device for rotor impeller of turboexpander - Google Patents

Abstract

The utility model discloses a dismounting device for a rotor impeller of a turboexpander, which comprises a reaction column arranged corresponding to a main shaft of the impeller, wherein a drawing disc is coaxially sleeved on the reaction column in a sliding manner, and a plurality of groups of drawing devices driving the drawing disc to axially slide are uniformly arranged between one end of the reaction column, which is far away from the impeller, and the drawing disc along the circumferential direction; a plurality of pulling claws which slide in the radial direction are uniformly arranged on the pulling disc along the circumferential direction, claw hooks are arranged at one ends of the pulling claws, which are close to the impeller, and a rim limiting part is rotatably arranged on one side, which is far away from the impeller, of the pulling claws; a stable air cushion is arranged between the rim limiting piece and the claw hook; the utility model discloses have the steadiness of effectively guaranteeing that the impeller dismantles outer disc of in-process impeller, blade, effectively avoid the impeller to dismantle the in-process impaired.

Description

Dismounting device for rotor impeller of turboexpander

Technical Field

The utility model belongs to the technical field of impeller dismounting device, concretely relates to turboexpander rotor impeller dismounting device.

Background

The rotor assembly of the turboexpander generally comprises a main shaft, a bearing and a baffle disc which are sleeved on the main shaft, an impeller and the like which are sleeved at the shaft end of the main shaft. The impeller is usually mounted on the end of the main shaft by correspondingly providing key slots on the end of the main shaft and the inner wall of the central hole of the impeller, and then providing a connecting key in the key slots to mount the impeller on the end of the main shaft. Because the impeller needs to rotate at a high speed along with the main shaft, in order to ensure the stability of the impeller installation, the connection key and the key groove are matched very tightly, and therefore the impeller is usually disassembled from the shaft end of the main shaft in an axial drawing mode.

However, the conventional impeller dismounting device is only connected with the end face of the impeller through the hook claw or the connecting bolt, then the hook claw or the connecting bolt is pushed against the end part of the main shaft through the reaction column, and the impeller is pulled out and dismounted from the end part of the main shaft through the reaction force. In the traditional impeller dismounting process, because the impeller volume of the turboexpander is large, the traditional impeller dismounting device lacks effective fixed support for the excircle surface and the end surface of the impeller, and the impeller is easy to shake and damage in the dismounting process. Meanwhile, gaps among blades of the impeller of the turboexpander are large, the blades are relatively fragile, and the traditional impeller dismounting device is lack of fixed supports for the blades in the process of dismounting the impeller, so that the blades are extremely easy to damage in the dismounting process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a turbo expander rotor impeller dismounting device realizes stabilizing safe dismantlement to turbo expander's impeller.

The utility model discloses a following technical scheme realizes:

a device for dismounting a rotor impeller of a turboexpander comprises a reaction column arranged corresponding to a main shaft of an impeller, wherein a drawing disc is coaxially and slidably sleeved on the reaction column, and a plurality of groups of drawing devices for driving the drawing disc to axially slide are uniformly arranged between one end, far away from the impeller, of the reaction column and the drawing disc along the circumferential direction; a plurality of pulling claws which slide in the radial direction are uniformly arranged on the pulling disc along the circumferential direction, claw hooks are arranged at one ends of the pulling claws, which are close to the impeller, and a rim limiting part is rotatably arranged on one side, which is far away from the impeller, of the pulling claws; and a stable air cushion is arranged between the rim limiting part and the claw hook.

The impeller is sleeved on the main shaft, and the reaction column is coaxially arranged corresponding to the main shaft. The impeller is provided with two end faces, one is an outer end face close to the shaft end of the main shaft, the other is an inner end face far away from the shaft end of the main shaft, and the diameter of the outer end face of the impeller is smaller than that of the inner end face. The pulling claws on the pulling disc are arranged corresponding to the outer circle profile of the inner end face of the impeller, and each pulling claw can slide along the radial direction, so that the outer circle profiles of different diameters can be fixed compatibly. When the pulling claw slides to the outer circle profile of the inner end surface of the impeller in the radial direction, the claw hook at the end part of the pulling claw hooks the inner end surface of the impeller. Then the wheel rim limiting part positioned on one side of the claw hook can be rotated, so that the wheel rim limiting part is rotated to be attached to the cambered surface in front of the inner end surface and the outer end surface of the impeller, and the impeller is effectively fixed. Meanwhile, the stable air cushion arranged between the rim limiting part and the claw hook is in flexible contact with the edge of the impeller, so that the damage to the impeller caused by the process of drawing the impeller is avoided.

After the impeller is fixed, the drawing disc can be driven by the drawing device to move along the direction of the reaction column away from the main shaft, and the claw hook can extract the impeller from the end part of the main shaft to detach the impeller due to the fact that the end part of the reaction column is abutted to the end part of the main shaft.

For better realization the utility model discloses, furtherly, still evenly be provided with a plurality of towards radial gliding terminal surface rim locating piece along circumference on the terminal surface that the drawing dish is close to impeller one side, the terminal surface rim locating piece corresponds the outer end off-plate excircle profile setting of impeller, and the excircle profile that can compatible different diameters is fixed through the terminal surface rim locating piece that slides.

In order to better realize the utility model discloses, further, one side that terminal surface rim locating piece is close to the impeller is provided with flexible liner.

For better realization the utility model discloses, furtherly, drawing device is including drawing the screw rod, the outside thread bush of drawing the screw rod is equipped with draws the nut seat, be provided with the mounting hole on the drawing dish, rotate in the mounting hole and be equipped with and draw the nut seat, the one end that the impeller was kept away from to the reaction column is provided with the supporting disk, be provided with the screw hole that supplies to draw screw rod thread installation on the supporting disk.

It should be noted that, the above-mentioned pulling nut seat and mounting hole rotation clamping means that the pulling nut seat is clamped with the mounting hole along the axial direction, so that the pulling nut seat and the mounting hole move axially in synchronization, and the pulling nut seat can rotate relatively with the mounting hole along the circumferential direction.

In order to better realize the utility model discloses, furtherly, the supporting disk with draw still to be provided with the guide post parallel with the counter-force post between the dish, the guide post pass the supporting disk and with supporting disk sliding connection.

In order to better realize the utility model discloses, furtherly, the clearance between the blade that corresponds the impeller along circumference on the terminal surface that the drawing dish is close to impeller one side is provided with a plurality of support airbags, be provided with the gas cell on the terminal surface that the impeller one side was kept away from to the drawing dish, be connected through the gas tube between gas cell and the support airbag.

The support gasbag with the shriveling is placed in the clearance between the blade to aerify to the support gasbag through dashing the gasbag and make the support gasbag bloated, and then fill the clearance between the blade, realize carrying out the flexible support to the blade.

It should be noted that the pressure inside the supporting airbag is far less than the limit force when the blade is damaged, that is, the supporting airbag does not burst to damage the blade when being inflated, and only flexibly supports the blade.

In order to better realize the utility model discloses, furtherly, the one end that the impeller was kept away from to the gas tube is provided with the gasbag and connects, be provided with the stop valve on the gas tube.

In order to better realize the utility model discloses, furtherly, the one end outside that the reaction column is close to the impeller is rotated the cover and is equipped with support bearing, the coaxial counter-force dish that is provided with of tip that the reaction column is close to the one end of impeller.

In order to better realize the utility model discloses, furtherly, the rim setting element includes rim locating piece, location screw thread axle, positioning nut, the setting of location screw thread axle is on the pulling claw, the epaxial cover that rotates of location screw thread is equipped with the rim locating piece, the epaxial screw thread cover that still goes back of location screw thread is equipped with positioning nut, positioning nut's a side end face is tight with rim locating piece side end face top.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

(1) the utility model discloses a setting up the counter-force post with the axle head butt of main shaft to slip suit drawing disk on the counter-force post, and evenly set up the pulling claw along circumference on drawing disk, collude the terminal surface of impeller through the claw of pulling claw tip, carry out the fixed support to the outside cambered surface of impeller through setting up the rim locating part that colludes one side at the claw simultaneously, and then realize the firm support of the outer disc of impeller and fix, effectively guarantee the steadiness and the security of impeller in the dismantlement process, effectively avoid the impeller impaired when dismantling; meanwhile, the distance between the pulling claws is adjusted by radially sliding the pulling claws, so that the impellers with different excircle sizes are compatible for fixed support;

(2) the utility model discloses a little end outside of the end profile that corresponds the impeller on the terminal surface of drawing the dish sets up a plurality of terminal surface rim locating pieces along circumference, fixes a position the little end outside of the end profile of impeller through terminal surface rim locating piece, further promotes the steadiness of impeller in the dismantlement process, effectively avoids the impeller to dismantle the time impaired;

(3) the utility model discloses a clearance setting between the blade on corresponding the impeller on drawing the terminal surface of dish supports the gasbag, aerifys to supporting the gasbag through the gas cell for support the gasbag after bloated with the clearance packing between the blade, and then realize effectively fixing the blade, effectively avoid the blade impaired at the dismantlement in-process.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a connection structure of a rim stopper and a claw;

FIG. 3 is a view taken along line A of FIG. 2;

FIG. 4 is a schematic view of the mounting structure of the claw;

FIG. 5 is a schematic structural view of a drawing apparatus;

fig. 6 is a schematic view showing a connection structure between the airbag and the support airbag.

Wherein: 1-a reaction column; 2-drawing the disc; 3-claw pulling; 4-claw hook; 5-a rim stop; 6-stabilizing the air cushion; 7-supporting the airbag; 8-inflating bag; 9-end face rim positioning block; 51-a rim locating block; 52-positioning the threaded shaft; 53-a positioning nut; 01-support bearings; 02-counterforce disk; 03-a support disk; 04-a guide post; 111-a sliding groove; 222-a slider; 333-adjusting screw; 444-stop valve; 001-drawing screw; 002-drawing the nut seat.

Detailed Description

Example 1:

as shown in fig. 1 and 2, the device for detaching a rotor impeller of a turboexpander in the present embodiment includes a reaction column 1 disposed corresponding to a main shaft of an impeller, a drawing disc 2 is coaxially and slidably sleeved on the reaction column 1, and a plurality of groups of drawing devices driving the drawing disc 2 to axially slide are uniformly disposed between one end of the reaction column 1, which is far away from the impeller, and the drawing disc 2 along a circumferential direction; a plurality of pulling claws 3 which slide in the radial direction are uniformly arranged on the pulling disc 2 along the circumferential direction, claw hooks 4 are arranged at one ends of the pulling claws 3 close to the impeller, and a wheel rim limiting part 5 is rotatably arranged on one side of the pulling claws 3, which is far away from the impeller, of the claw hooks 4; and a stable air cushion 6 is arranged between the rim limiting piece 5 and the claw hook 4.

The impeller is sleeved on the end portion of the main shaft, one end, close to the end portion of the main shaft, of the impeller is an outer end face, and one end, far away from the end portion of the main shaft, of the impeller is an inner end face. As shown in fig. 4, at least two sliding grooves 111 are uniformly arranged on the drawing plate 2 along the axial direction, and the direction of the sliding grooves 111 is arranged along the radial direction of the drawing plate 2. One end of the claw 3 is slidably disposed in the slide groove 111 via a slider 222. The inside of the sliding groove 111 is further provided with an adjusting screw 333 along the length direction of the sliding groove 111 in a threaded manner, the slider 222 is provided with a threaded hole for mounting the adjusting screw 333 in a threaded manner, and by rotating the adjusting screw 333, the slider 222 is driven to slide along the sliding groove 111, so that the radial position of the pulling claw 3 on the pulling disc 2 is adjusted. Meanwhile, after the adjusting screw 333 stops rotating, the position of the claw 3 is correspondingly fixed due to the self-locking of the screw thread between the adjusting screw 333 and the threaded hole on the slider 222. Through the radial position of adjusting the pulling claw 3, and then make the pulling claw 3 correspond different excircle diameters and carry out the centre gripping to the outer circular profile of inner terminal surface of impeller, when the outer circular profile laminating of pulling claw 3 and the inner terminal surface of impeller, the claw of 3 tip of pulling claw 4 this moment catches on the inner terminal surface of impeller.

Then, the rim limiting part 5 on one side of the claw hook 4 can be rotated, so that the rim limiting part 5 is contacted with the outer arc surface of the impeller, then the rim limiting part 5 can be fixed, and the inner end of the impeller is fixed by the matching of the rim limiting part 5 and the claw hook 4. Meanwhile, the outer side surface of the impeller is flexibly buffered through the stable air cushion 6 arranged between the rim limiting part 5 and the claw hook 4, and the damage to the impeller caused in the process of disassembling the impeller is avoided.

After the impeller is fixed, the drawing disc 2 can be driven to slide along the direction of keeping away from the main shaft along the direction of the reaction column 1 through the drawing device, and then the claw hook 3 at the end part of the drawing claw 2 is driven to extract the impeller from the main shaft, so that the impeller is convenient and stable to disassemble, and meanwhile damage to the impeller is effectively avoided.

Example 2:

this embodiment is further optimized on embodiment 1's basis, as shown in fig. 1 and 4, drawing dish 2 is close to and still evenly is provided with a plurality of terminal surface rim locating piece 9 along circumference on the terminal surface of impeller one side, and terminal surface rim locating piece 9 corresponds the excircle profile setting of the outer terminal surface of impeller, carries out spacing fixed through terminal surface rim locating piece 9 to the outer terminal surface excircle profile of impeller, further promotes steadiness and security in the impeller dismantlement process, avoids the damage to the impeller more effectively.

Furthermore, one side of the end face rim positioning block 9, which is close to the impeller, is provided with a flexible gasket, the flexible gasket is prepared from flexible materials such as rubber and foam, and flexible contact between the end face rim positioning block and the outer end face outer circular contour of the impeller is realized by arranging the flexible gasket, so that damage to the impeller is avoided.

Other parts of this embodiment are the same as embodiment 1, and thus are not described again.

Example 3:

this embodiment is further optimized on the basis of above-mentioned embodiment 1 or 2, as shown in fig. 5, the drawing device is including drawing screw 001, the outside thread bush that draws screw 001 is equipped with draws nut seat 002, be provided with the mounting hole on drawing dish 2, rotate the chucking in the mounting hole and draw nut seat 002, the one end that the impeller was kept away from to reaction post 1 is provided with supporting disk 03, be provided with the screw hole that supplies to draw screw 001 thread installation on the supporting disk 03.

Draw screw rod 001 through rotating, and then drive and draw nut seat 002 and carry out linear movement along the axial of keeping away from the main shaft axle head, and then drive the direction removal of drawing dish 2 orientation keeping away from the main shaft axle head.

Further, the outer contour of the drawing nut seat 002 is a stepped cylinder, the outer side surface of the small-diameter cylinder of the drawing nut seat 002 is in running fit with the inner hole surface of the mounting hole in the drawing disc 2, and the end surface of the large-diameter cylinder of the drawing nut seat 002 is in axial limit contact with the end surface of the drawing disc 2. Further, the drawing nut seat 002 and the mounting hole can rotate relatively and simultaneously drive the drawing disc 2 to move linearly in the axial direction.

The other parts of this embodiment are the same as those of embodiments 1 to 3, and thus are not described again.

Example 4:

this embodiment is further optimized on the basis of any of the above embodiments 1 to 3, as shown in fig. 5, a guiding column 04 parallel to the reaction column 1 is further disposed between the supporting disc 03 and the drawing disc 2, and the guiding column 04 penetrates through the supporting disc 03 and is slidably connected with the supporting disc 03.

The supporting disc 03 is provided with a guide hole, one end of the guide column 04 penetrates through the guide hole, the outer circular surface of the guide column 04 is in sliding contact with the inner hole surface of the guide hole, and the other end of the guide column 04 is fixedly connected with the end surface of the drawing disc 2. Through the sliding fit of guide post 04 and guiding hole, and then realize the axial sliding direction to drawing dish 2 for the slip of drawing dish 2 is more steady.

The other parts of this embodiment are the same as those of embodiments 1 to 3, and thus are not described again.

Example 5:

the embodiment is further optimized on the basis of any one of the embodiments 1 to 4, as shown in fig. 1 and 6, a plurality of supporting airbags 7 are arranged on the end surface of the drawing plate 2 close to one side of the impeller along the gaps between the blades of the impeller corresponding to the circumferential direction, an inflating bag 8 is arranged on the end surface of the drawing plate 2 far away from one side of the impeller, and the inflating bag 8 is connected with the supporting airbags 7 through an inflating pipe.

Support gasbag 7 is the shrivelled state at ordinary times, and after the excircle profile of impeller is fixed through pulling claw 3 and claw hook 5, can put into the clearance between the blade with the support gasbag 7 of shriveling, then aerify to support gasbag 7 through gas cell 8 for support gasbag 7 expands gradually, is full of the clearance between the blade until support gasbag 7, and then realizes fixed the support of blade, effectively avoids the impeller to dismantle the in-process and causes the damage to the blade.

Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.

Example 6:

this embodiment is further optimized on the basis of any one of the above embodiments 1 to 5, as shown in fig. 6, an air bag connector is disposed at an end of the inflation tube away from the impeller, and a stop valve 444 is disposed on the inflation tube.

The quick connection between the end of the inflation tube and the inflation port of the inflation bag 8 can be realized by arranging the air bag connector, and meanwhile, the manual stop valve 444 is arranged on the inflation tube, so that the inflation tube is closed or opened through the stop valve 444. When the supporting airbag 7 needs to be inflated, the stop valve 444 can be operated to open the inflation tube for inflation, and the inflation tube is closed through the stop valve 444 after inflation is completed, so that the gas inside the supporting airbag 7 is prevented from overflowing.

Other parts of this embodiment are the same as any of embodiments 1 to 5, and thus are not described again.

Example 7:

the present embodiment is further optimized based on any of the embodiments 1 to 6, as shown in fig. 5, a support bearing 01 is rotatably sleeved outside one end of the reaction column 1 close to the impeller, and a reaction disc 02 is coaxially disposed at an end of the reaction column 1 close to one end of the impeller.

The outside that the one end of reaction post 1 is close to the main shaft is provided with the location shaft shoulder, and location shaft shoulder department rotates and installs support bearing 01, and support bearing 01's outer disc and the downthehole facial features contact of the centre bore of impeller support reaction post 1 through support bearing 01, and the direct and shaft end face butt of main shaft of reaction plate 02 that the tip that reaction post 1 is close to the one end of impeller set up.

Furthermore, a guide groove is formed in one side, close to the shaft end of the main shaft, of the reaction disc 02, and the reaction disc 02 is more easily contacted with the shaft end of the main shaft through the guide groove.

Other parts of this embodiment are the same as any of embodiments 1 to 6, and thus are not described again.

Example 8:

this embodiment is further optimized on the basis of any one of above-mentioned embodiments 1-7, as shown in fig. 2 and fig. 3, rim positioning piece 5 includes rim positioning block 51, location threaded shaft 52, positioning nut 53, location threaded shaft 52 sets up on pulling claw 3, it is equipped with rim positioning block 51 to rotate the cover on location threaded shaft 52, it is equipped with positioning nut 53 to go back threaded cover on location threaded shaft 52, one side terminal surface of positioning nut 53 is with rim positioning block 51 side terminal surface top tight.

Be provided with the screw hole on the claw 3, location threaded shaft 52 screw thread is installed in the screw hole, and the both ends of location threaded shaft 52 all extend to the screw hole outside. The two sides of one end of the rim positioning block 51 close to the positioning threaded shaft 51 are respectively provided with a connecting support lug corresponding to the two ends of the positioning threaded shaft 52, the connecting support lugs are provided with through holes for the end part of the positioning threaded shaft 52 to pass through, and the threaded section of the end part of the positioning threaded shaft 52 is further provided with a positioning nut 53 in a threaded sleeve mode.

When the positioning nut 53 is not screwed down, the connecting lug on the rim positioning block 51 is not pressed, and at the moment, the rim positioning block 51 can rotate around the shaft end of the positioning threaded shaft 52, so that the inclination angle of the rim positioning block 51 is adjusted until the rim positioning block 51 is in contact with the cambered surface of the outer side of the impeller in a fitting manner. Then, the positioning nut 53 can be screwed down, so that the positioning nut 53 presses the connecting lug on the rim positioning block 51, and at the moment, the rim positioning block 51 cannot rotate continuously, and the pose of the rim positioning block 51 is fixed.

Other parts of this embodiment are the same as any of embodiments 1 to 7, and thus are not described again.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.

Claims (9)

1. A rotor impeller dismounting device of a turboexpander comprises a reaction column (1) arranged corresponding to a main shaft of an impeller, and is characterized in that a drawing disc (2) is coaxially sleeved on the reaction column (1) in a sliding mode, and a plurality of groups of drawing devices driving the drawing disc (2) to axially slide are uniformly arranged between one end, far away from the impeller, of the reaction column (1) and the drawing disc (2) along the circumferential direction; a plurality of pulling claws (3) which slide in the radial direction are uniformly arranged on the pulling disc (2) along the circumferential direction, claw hooks (4) are arranged at one ends of the pulling claws (3) close to the impeller, and wheel rim limiting parts (5) are rotatably arranged on one sides of the claw hooks (4) far away from the impeller on the pulling claws (3); and a stable air cushion (6) is arranged between the rim limiting piece (5) and the claw hook (4).

2. The device for disassembling the rotor wheel of the turboexpander according to claim 1, wherein the end face of the drawing disc (2) close to the side of the rotor wheel is further provided with a plurality of end face rim positioning blocks (9) uniformly along the circumferential direction.

3. A turbo-expander rotor wheel disassembly apparatus as claimed in claim 2, wherein said end rim locating block (9) is provided with a flexible liner on the side adjacent to the wheel.

4. A turbo expander rotor impeller dismounting device according to any one of claims 1-3, characterized in that the drawing device comprises a drawing screw (001), the outer threaded sleeve of the drawing screw (001) is provided with a drawing nut seat (002), the drawing disc (2) is provided with a mounting hole, the drawing nut seat (002) is rotatably clamped in the mounting hole, one end of the reaction column (1) far away from the impeller is provided with a supporting disc (03), and the supporting disc (03) is provided with a threaded hole for the threaded mounting of the drawing screw (001).

5. The expander rotor wheel dismounting device according to claim 4, characterized in that a guide column (04) parallel to the reaction column (1) is further arranged between the support disc (03) and the drawing disc (2), and the guide column (04) penetrates through the support disc (03) and is in sliding connection with the support disc (03).

6. A rotor wheel dismounting device for a turbo-expander according to any one of claims 1-3, wherein a plurality of supporting air bags (7) are arranged on the end surface of the drawing disc (2) close to the side of the impeller along the circumferential direction corresponding to the gaps between the blades of the impeller, an air inflation bag (8) is arranged on the end surface of the drawing disc (2) far away from the side of the impeller, and the air inflation bag (8) is connected with the supporting air bags (7) through an air inflation pipe.

7. The device for detaching the rotor wheel of the turboexpander according to claim 6, wherein an end of the inflation tube, which is far away from the rotor wheel, is provided with an air bag connector, and the inflation tube is provided with a stop valve (444).

8. A device for detaching a rotor wheel of a turboexpander according to any one of claims 1-3, wherein a support bearing (01) is rotatably sleeved outside one end of the reaction column (1) close to the impeller, and a reaction disc (02) is coaxially arranged at one end of the reaction column (1) close to the impeller.

9. The device for disassembling the rotor impeller of the turboexpander according to any one of claims 1 to 3, wherein the rim limiting member (5) includes a rim positioning block (51), a positioning threaded shaft (52), and a positioning nut (53), the positioning threaded shaft (52) is disposed on the pulling claw (3), the rim positioning block (51) is rotatably sleeved on the positioning threaded shaft (52), the positioning nut (53) is further threadedly sleeved on the positioning threaded shaft (52), and one side end face of the positioning nut (53) abuts against one side end face of the rim positioning block (51).

Images