CN220839988U - Device for pulling large-aperture thin-wall embedded shaft sleeve of bottom ring of water turbine - Google Patents

Abstract

The utility model discloses a large-aperture thin-wall embedded shaft sleeve pulling device of a bottom ring of a water turbine, which comprises a pulling mechanism and an expanding mechanism, wherein the pulling mechanism and the expanding mechanism are fixed, the expanding mechanism is placed in a shaft sleeve in the bottom ring, a pulling rod penetrates through a middle through hole of a supporting steel plate to be connected with the expanding mechanism, the pulling steel plate is rotated to enable the pulling rod to be in threaded connection with the expanding mechanism, meanwhile, a conical structure of the pulling rod starts to attack into a conical hole of the expanding sleeve until the outer circular surface of a claw starts to be close to the wall surface of a blind hole, the claw is attached to the wall surface of the shaft sleeve, the rotating lever drives the pulling rod to move upwards, the pulling steel plate is driven by the upward acting force of the pulling rod to drive the pulling rod and the expanding mechanism to move upwards in a straight line, and the embedded shaft sleeve is driven to move upwards in the upward process of the upward acting force of the claw until the shaft sleeve is pulled out.

Description

Device for pulling large-aperture thin-wall embedded shaft sleeve of bottom ring of water turbine

Technical Field

The utility model belongs to the field of water turbine design, and particularly relates to a pulling device for a large-aperture thin-wall embedded shaft sleeve of a bottom ring of a water turbine.

Background

In order to realize the control of the flow rate of the turbine in the running process of the hydroelectric generating set, movable guide vanes are required to be arranged on the water turbine, a bottom ring of the water turbine is usually arranged at the lower part of a flow passage of the water guide mechanism, large-diameter apertures with the same number as the movable guide vanes are arranged on the bottom ring, thin-wall shaft sleeves are arranged in the holes in an embedded manner, and the rotation of the movable guide vanes is facilitated while the lower shaft ends of the movable guide vanes are supported, so that the flow rate of the turbine is regulated. The thin-wall shaft sleeve part is used as the supporting reaction force of the movable guide vane, and the guide vane has large weight and needs to bear and transmit water thrust, so that the thin-wall shaft sleeve can be invalid when the running time of the water turbine unit is long, the thin-wall shaft sleeve is replaced in time, the occurrence of the situations of rotation blocking of the movable guide vane and the like is prevented, and the safe and stable running of the unit is seriously influenced.

The aperture of the embedded shaft sleeve and the aperture of the bottom ring are in interference fit, when the shaft sleeve needs to be replaced, the assembly relation between the shaft sleeve and the bottom ring cannot be damaged, otherwise, the bottom ring is directly damaged, and large economic loss is caused. When the existing embedded shaft sleeve fails and cannot work, a workpiece is usually required to be clamped on a lathe to be cut, but when the embedded shaft sleeve in the bottom ring of the hydraulic turbine is required to be overhauled, the method usually occurs in a hydropower station, and the problems of long time period, high transportation cost and the like exist, and the situations of complex site of the hydropower station, difficult equipment installation and the like exist; in addition, the manual impact and disassembly mode is a common disassembly mode of the embedded shaft sleeve, the embedded shaft sleeve is impacted in the opposite direction through the cooperation of the heavy hammer and the tool, so that the shaft sleeve and the workpiece are displaced to separate the embedded shaft sleeve, but the mode is suitable for the condition of a through hole, the bottom ring of the embedded shaft sleeve is a blind hole, the impact and disassembly mode has high manual control difficulty, the deformation of the aperture of the workpiece is easily caused in the impact process, the mechanical property of the workpiece is lost, and the labor intensity and the economic loss are caused; at present, a lining shaft sleeve is usually pulled out in a welding mode, certain round steel is welded on the embedded shaft sleeve, the shaft sleeve is pulled out in a manual drawing mode, but the shaft sleeve is suddenly broken in the method, the efficiency is still very low, the bottom ring shaft sleeve of the water turbine is very thin, the welding difficulty is high, sufficient rigidity is difficult to ensure, and importantly, the embedded shaft sleeve in the bottom ring of the water turbine is usually made of nonmetallic materials and is difficult to weld. The common disassembly tool is characterized in that a plurality of clamping jaws are adopted to clamp the shaft sleeve for pulling, and the hole diameter of the bottom ring of the water turbine is large, so that the shaft sleeve is thin.

The Chinese patent publication No. CN200984726Y discloses a blind hole bushing puller, which comprises a shaft sleeve, a pull rod head and a handle, wherein one side of the shaft sleeve is a pull section, the outer diameter of the pull section is slightly smaller than the inner diameter of an inner bushing to be disassembled, the inner surface of the pull section is a conical surface, a plurality of strip-shaped through grooves with single end openings are formed in the pull section along the axial direction, one end of the pull rod is arranged in the shaft sleeve in a screw feeding mode, the corresponding part of the pull rod and the pull section of the shaft sleeve is a tapered push-pull section, the taper of the push-pull section is the same as that of the inner surface of the pull section, the pull rod head is fixed at the extending end of the pull rod, and the handle is arranged on the pull rod head. When the novel sleeve is used, the shaft sleeve drawing section stretches into the inner hole of the sleeve, the handle is rotated, the pull rod pushing section gradually expands the shaft sleeve to lock the shaft sleeve and the sleeve, and the handle is pulled outwards to pull out the sleeve.

This patent adopts direct outside pulling handle to pull out the bush when pulling out, however is interference fit between the embedded axle sleeve of big aperture thin wall of hydraulic turbine bottom ring and the bottom ring generally, and the two are connected comparatively closely, only relies on pulling handle to be difficult to pull out the axle sleeve, and this puller is applicable to the embedded bush of aperture only, is difficult to be suitable for to big aperture axle sleeve.

Therefore, in order to solve the above problems, it is highly desirable to provide a pulling device for a large-aperture thin-wall embedded shaft sleeve of a bottom ring of a water turbine, which is capable of solving the problems of the large diameter and the thin thickness of the shaft sleeve of the bottom ring of the water turbine without damaging the matching relationship between the bottom ring and the shaft sleeve.

Disclosure of utility model

The utility model aims to solve the problems of time consumption, labor consumption, high cost, economic loss, complex tool, low matching performance and the like of a shaft sleeve pulling device in the prior art, which are easy to cause the deformation of the aperture of a workpiece, so that the utility model provides the large-aperture thin-wall embedded shaft sleeve pulling device for the bottom ring of the water turbine, which has the advantages of simple structure, high flexibility and high reliability.

In order to achieve the above object, the present utility model has the following technical scheme:

The utility model provides a water turbine bottom ring large aperture thin wall embeds axle sleeve pulling device, includes pulling out mechanism and mechanism that rises, pulling out mechanism includes pull-out pole, pull-out steel sheet, supporting steel sheet, bracing piece and jack-up pole, pull-out pole bottom is the toper structure, the position that the pull-out pole is close to the toper structure is equipped with the screw thread, pull-out pole top and pull-out steel sheet fixed connection, supporting steel sheet intermediate position is equipped with the through-hole, and the pull-out pole passes the through-hole downwardly extending, the supporting steel sheet both sides are equipped with two screw holes respectively correspondingly, the bracing piece surface is equipped with the screw thread, cooperates with the supporting steel sheet through the screw hole of the nearly intermediate position department in supporting steel sheet both sides, jack-up pole bottom is provided with the thick stick handle, makes jack-up pole upward motion jack-up steel sheet through rotating the thick stick handle, pulls jack-up pole;

The top of the expansion mechanism is provided with a threaded hole matched with the thread of the pull-up rod, the bottom of the expansion mechanism is an expansion sleeve, the expansion sleeve is of a multi-petal structure, the inside of the multi-petal structure is a taper hole in interference fit with the taper structure of the pull-up rod, the bottom of the expansion sleeve is fixedly connected with a claw, and the claw is an annular multi-petal steel plate vertical to the expansion sleeve;

Further, the expansion sleeve and the clamping jaw are of a four-petal structure; the top of the expansion mechanism is of a hexagonal cylinder structure and is used for being fixed by a wrench during installation.

Further, the inner wall of the opening of the expansion sleeve is provided with an anti-cracking arc, and the inner wall of the opening is rounded to realize smooth arc transition, so that the structure is reinforced, the concentrated stress is reduced, and the anti-cracking sleeve is effectively used for preventing cracking.

Further, the clamping jaw is connected with the bottom of the expansion sleeve through welding;

Furthermore, nuts are respectively arranged on the upper side and the lower side of the supporting steel plate to fix the supporting steel plate and the supporting rods;

further, the top of the pulling-up rod is connected with the pulling-up steel plate through welding;

further, a through hole is horizontally formed in the bottom of the jacking rod (3), the lever handle (7) is movably inserted into the through hole, and the position of the lever handle can be adjusted to continue rotating when the lever handle rotates to meet the obstruction.

The utility model has the beneficial effects that:

1. The utility model has simple structure, convenient manufacture, high extraction efficiency and low use cost, the expansion sleeve adopts a multi-petal structure to reduce the rigidity of the expansion sleeve, is favorable for expanding when the extraction rod is tapped, reduces the tapping difficulty, and the multi-petal claw is simultaneously clamped on the wall surface of the inner sleeve of the bottom ring, so that the acting force is applied more uniformly, the deformation of the bottom ring caused by uneven force applied by the expansion sleeve on the wall surface of the shaft sleeve is prevented, the larger economic loss is generated, the rigidity and the strength for connecting and fixing the expansion sleeve and the expansion sleeve can be increased, and the claw is prevented from falling off when the shaft sleeve is extracted.

2. According to the utility model, the bottom of the expansion sleeve is fixedly connected with the claw, the claw is an annular multi-petal steel plate vertical to the expansion sleeve, the diameter of the outer circle of the claw is large, the large-diameter thin-wall shaft sleeve can be pulled out, and the expansion sleeve and the claw can be used for adjusting the expansion size according to the attack of the conical structure of the pull-up rod, so that the expansion sleeve has the advantage of wide application range.

3. According to the utility model, the lifting rod is enabled to move upwards to lift the lifting steel plate by rotating the lever, the lifting steel plate drives the lifting rod and the expansion sleeve to do linear motion to pull the shaft sleeve out of the bottom ring, the method is simple in structure, convenient to operate and low in use cost, labor can be effectively saved when the shaft sleeve is pulled out, and the shaft sleeve can be quickly and efficiently pulled out when the shaft sleeve is clamped and locked in the bottom ring.

4. According to the utility model, the conical structure with the large bottom and the small top is tapped into the interior of the expansion sleeve, and the elastic contraction force of the expansion sleeve is relied on, so that interference fit self-locking is formed between the conical structure surface and the conical hole of the expansion sleeve, the upper part of the expansion sleeve is fixedly connected with the pulling rod through threads, a main connecting rod for pulling out the shaft sleeve is formed, and the rigidity and strength for connecting and fixing the two are increased.

Drawings

FIG. 1 is a cross-sectional view of the structure of the present utility model;

FIG. 2 is a schematic view of the pulling mechanism of the present utility model;

FIG. 3 is a schematic diagram showing the combination of the pulling-up lever and the expanding mechanism of the present utility model;

FIG. 4 is a schematic view of the structure of the supporting steel plate according to the present utility model;

FIG. 5 is a schematic view of an expansion mechanism according to the present utility model;

FIG. 6 is a cross-sectional view of the expansion mechanism of the present utility model;

Wherein, 1, the rod is pulled up; 2. pulling up the steel plate; 3. jacking up the rod; 4. a support rod; 5. an anti-cracking arc; 6. supporting a steel plate; 7. a lever handle; 8. an expanding mechanism; 9. a bottom ring; 10. a shaft sleeve is embedded; 11. and (3) clamping jaws.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting.

Example 1

As shown in fig. 1-6, the pulling device for the large-aperture thin-wall embedded shaft sleeve of the bottom ring of the water turbine comprises a pulling mechanism and an expanding mechanism 8, wherein the pulling mechanism comprises a pulling rod 1, a pulling steel plate 2, a supporting steel plate 6, a supporting rod 4 and a jacking rod 3, the bottom of the pulling rod 1 is of a conical structure, threads are arranged at the position, close to the conical structure, of the pulling rod 1, the top of the pulling rod 1 is welded with the pulling steel plate 2, a through hole is arranged in the middle of the supporting steel plate 6, the pulling rod 1 penetrates through the through hole to extend downwards, and two threaded holes are correspondingly arranged at two sides of the supporting steel plate 6 respectively; the surface of the supporting rod 4 is provided with threads, and the threads are matched with the supporting steel plate 6 through threaded holes at the positions of the near ends at the two sides of the supporting steel plate 6; the surface of the jacking rod 3 is provided with threads, the jacking rod 3 is matched with the supporting steel plate 6 through threaded holes at the positions, close to the middle, of the two sides of the supporting steel plate 6, and the bottom of the jacking rod 3 is provided with a lever handle 7;

The top of the expansion mechanism 8 is provided with a threaded hole matched with the thread of the pull-up rod 1, the bottom of the expansion mechanism 8 is an expansion sleeve, the expansion sleeve is of a four-petal structure, the inside of the multi-petal structure is a taper hole which forms interference fit with the taper structure of the pull-up rod 1, the bottom of the expansion sleeve is fixedly connected with a claw 11, and the claw 11 is an annular four-petal steel plate vertical to the expansion sleeve.

In the embodiment, the supporting rod 4 is contacted with the wall surface of the bottom ring 9, the supporting steel plate 6 and the supporting rod 4 are fixed to a certain height through threads, the fixing of the pulling mechanism is completed, the pulling-up mechanism 8 is put into the inner shaft sleeve of the bottom ring 9, the pulling-up rod 1 passes through the middle through hole of the supporting steel plate 6 to be connected with the pulling-up mechanism 8, the pulling-up steel plate 2 is rotated to enable the pulling-up rod 1 to be in threaded connection with the pulling-up mechanism 8, meanwhile, the conical structure of the pulling-up rod 1 starts to be tapped into the conical hole of the pulling-up sleeve until the outer circular surface of the clamping jaw 11 starts to be close to the wall surface of the blind hole, the clamping jaw 11 stops rotating when being attached to the wall surface of the shaft sleeve, and the pulling-up mechanism 8 is contained in the conical structure part of the pulling-up rod 1 due to elastic shrinkage to form interference fit self-locking and threaded fixing, so that the fixing of the whole pulling-up device is completed; the rotating lever handle 7 drives the jacking rod 3 to move upwards, the pulling-up steel plate 2 is driven to do linear motion upwards by the upward acting force from the jacking rod 3, the claw 11 drives the embedded shaft sleeve 10 to move upwards in the upward moving process of the claw 11 until the shaft sleeve is pulled out, and the generated reverse acting force is transmitted to the bottom ring 9 through the supporting rod 4 and the supporting steel plate 6.

Example 2

Compared with the embodiment 1, the difference is that the expanding sleeve and the claw 11 are of a five-petal structure; the top of the expanding mechanism 8 is of a hexagonal cylinder structure; an anti-cracking arc 5 is processed on the inner wall of the expansion opening of the expansion sleeve; the bottom of the jacking rod 3 is horizontally provided with a through hole, and the lever handle 7 is movably inserted into the through hole; other structures are the same as in embodiment 1.

In the embodiment, when the pulling-up steel plate 2 is rotated to enable the pulling-up rod 1 to be in threaded connection with the expanding mechanism 8, and meanwhile, the conical structure of the pulling-up rod 1 starts to attack into the conical hole of the expanding mechanism 8, the expanding mechanism 8 is fixed on the hexagonal cylinder structure at the top of the expanding mechanism 8 through a wrench sleeve, and the expanding sleeve is prevented from rotating during attack; an anti-cracking arc 5 is processed on the inner wall of the opening of the expansion sleeve, and the inner wall of the opening is rounded to realize smooth arc transition so as to realize the reinforcement of the structure, reduce concentrated stress and effectively stop and prevent cracking; through-holes are horizontally formed in the bottom of the jacking rod 3, the lever handle 7 penetrates into the through-holes to rotate when needed, so that the jacking rod 3 moves upwards, the lever handle 7 can move in the through-holes, and the position of the lever handle 7 can be adjusted to continue to rotate when the lever handle 7 rotates to meet the obstruction.

It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (8)

1. The utility model provides a water turbine bottom ring large aperture thin wall embeds axle sleeve pulling device, includes pulling up mechanism and opening mechanism (8), its characterized in that: the lifting mechanism comprises a lifting rod (1), a lifting steel plate (2), a supporting steel plate (6), a supporting rod (4) and a jacking rod (3), wherein the bottom of the lifting rod (1) is of a conical structure, threads are arranged at the position, close to the conical structure, of the lifting rod (1), the top of the lifting rod (1) is fixedly connected with the lifting steel plate (2), a through hole is formed in the middle of the supporting steel plate (6), the lifting rod (1) penetrates through the through hole and extends downwards, and two threaded holes are correspondingly formed in two sides of the supporting steel plate (6) respectively; the surface of the supporting rod (4) is provided with threads, and the threads are matched with the supporting steel plate (6) through threaded holes at the positions of the near ends at the two sides of the supporting steel plate (6); the surface of the jacking rod (3) is provided with threads, the jacking rod is matched with the supporting steel plate (6) through threaded holes at the positions, close to the middle, of the two sides of the supporting steel plate (6), and the bottom of the jacking rod (3) is provided with a lever handle (7);

The utility model discloses a pull-out device, including opening mechanism (8), jack catch (11) and annular multi-petal steel sheet, opening mechanism (8) top is provided with the screw thread with pull-out pole (1) matched with, and opening mechanism (8) bottom is the cover that opens, and the cover that opens is multi-petal structure, and the inside of multi-petal structure is for forming interference fit's taper hole with pull-out pole (1) toper structure, opens cover bottom fixedly connected with jack catch (11), jack catch (11) are with opening cover vertically annular multi-petal steel sheet.

2. The extraction device of claim 1, wherein: the expansion sleeve and the clamping jaw (11) are of a four-petal structure.

3. The extraction device of claim 1, wherein: the top of the expansion mechanism (8) is of a hexagonal cylinder structure.

4. The extraction device of claim 1, wherein: an anti-cracking arc (5) is machined on the inner wall of the opening of the expansion sleeve, and the inner wall of the opening is rounded to realize smooth arc transition.

5. The extraction device of claim 1, wherein: the two support rods (4) are respectively provided with a nut at the upper side and the lower side of the support steel plate (6) to fix the support steel plate (6) and the support rods (4).

6. The extraction device of claim 1, wherein: the clamping claw (11) is connected with the bottom of the expansion sleeve through welding.

7. The extraction device of claim 1, wherein: the top of the pulling-up rod (1) is connected with the pulling-up steel plate (2) through welding.

8. The extraction device of claim 1, wherein: the bottom of the jacking rod (3) is horizontally provided with a through hole, and the lever handle (7) is movably inserted into the through hole.