KR20100129590A - Turbine bucket pulling up jig - Google Patents

Turbine bucket pulling up jig Download PDF

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Publication number
KR20100129590A
KR20100129590A KR1020090048233A KR20090048233A KR20100129590A KR 20100129590 A KR20100129590 A KR 20100129590A KR 1020090048233 A KR1020090048233 A KR 1020090048233A KR 20090048233 A KR20090048233 A KR 20090048233A KR 20100129590 A KR20100129590 A KR 20100129590A
Authority
KR
South Korea
Prior art keywords
bucket
lifting jig
turbine
blade
rotor
Prior art date
Application number
KR1020090048233A
Other languages
Korean (ko)
Inventor
백승학
Original Assignee
두산중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 두산중공업 주식회사 filed Critical 두산중공업 주식회사
Priority to KR1020090048233A priority Critical patent/KR20100129590A/en
Publication of KR20100129590A publication Critical patent/KR20100129590A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/44—Gripping members engaging only the external or internal surfaces of the articles and applying frictional forces

Abstract

The present invention relates to a lifting jig used when assembling a bucket to a rotor of a turbine, and more particularly, to assemble a bucket having a weight to the rotor of a turbine, while assembling a worker with a minimum of manpower and easy to assemble in a short time. In order to make it happen,

In the lifting jig used when assembling the bucket to the rotor of the turbine, the lifting jig has a suspension ring suspended by a crane band on the upper part, and the blades of the bucket are caught and released while being widened and narrowed at the lower sides of the suspension ring. The lifting jig for a turbine bucket, characterized in that the gripping means is provided.

Description

Lifting bucket for turbine buckets {Turbine bucket pulling up jig}

The present invention relates to a lifting jig used when assembling a bucket to a rotor of a turbine, and more particularly, to assemble a bucket having a weight to the rotor of a turbine, while assembling a worker with a minimum of manpower and easy to assemble in a short time. It relates to a lifting jig for a turbine bucket to be made.

In general, a turbine converts thermal energy of steam generated from a boiler or a reactor into mechanical energy to drive a generator to generate electric power, and includes a rotor that is a rotating body rotating at high speed by the flow of steam.

As described above, the rotor 100 of the turbine is installed to be orthogonal to the flow direction of steam as shown in FIG. 4 and has a blade 112 having a streamlined cross-sectional shape in a wheel formed on the outer circumferential surface of the rotor. The bucket 110 is assembled, and when the steam flows through the blade, the rotor rotates as the rotational force is generated by the pressure difference between the upper and lower sides of the blade, and the rotational force is a conventional generator (not shown). Is delivered to produce power.

On the other hand, the conventional rotor and the bucket assembling structure is typically formed in the form of a plurality of grooves and protrusions continuous dovetail (Dovetail) shape coupled to each other, that is, the finger formed according to the shape formed on the bottom of the bucket 110 Dovetail protrusions 114 of the type or fine tree type are formed, and a dovetail groove 104 having a shape corresponding to the dovetail protrusion is formed on the wheel formed on the outer circumferential surface of the rotor 100 so that the dovetail protrusion is doveed. By inserting the fixing pins inserted into the tail grooves and formed at the mutually corresponding portions, a series of assembly operations are completed.

However, the process of assembling the bucket to the rotor as in the prior art is usually a pair of three people, that is, when the lifting worker wraps up the bucket to be assembled to the band of the crane in the loading box with the bucket, etc. As soon as the assembling worker picks up the bucket directly and fits the dovetail protrusion of the bucket into the dovetail groove formed on the wheel of the rotor, the other troublesome worker assembles it as the fixing hole formed in the debtail groove and the dovetail protrusion with the fixing pin. To be completed, at this time, the bucket has a factor that poses a great risk for safety as the worker directly lifts and assembles during transport or assembly according to the load having a weight of about 20-40 kg, and continued work It also provides a cause for causing pain in the body of the worker.

In addition, the assembling work is manually performed by the assembling worker, that is, the assembling work is performed by manually inserting the dovetail protrusion into the dovetail groove formed on the wheel of the rotor while the bucket having the weight is directly heard, thereby providing a working time. This quite long problem also occurred.

The present invention has been made to solve the above-mentioned conventional problems, its main purpose is to assemble the bucket having a weight in the rotor of the turbine, the safety of the operator when the assembly is made easily in a short time with a minimum of manpower To provide a lifting jig for a turbine bucket.

Another object of the present invention is to minimize the increase in gripping force and slip with respect to the weight of the bucket.

It is still another object of the present invention to minimize damage to the bucket during gripping.

Still another object of the present invention is to make the annealing more smoothly.

The present invention for solving the technical problem as described above, in the lifting jig used when assembling the bucket to the rotor of the turbine, the lifting jig is formed a suspension ring suspended by a crane band at the top, Both sides of the lower portion is characterized in that the holding means is provided that can hold and release the blade of the bucket while opening and narrowing.

The holding means is freely mounted on the lower portion of the suspension ring rotatably, the lower portion is formed in contact with the blades of the bucket, the middle is provided with a holding member each of which is provided with an operating part to be widened and narrowed, characterized in that do.

The contact portion of the gripping member is characterized in that the inclined surface is inclined downward from the upward.

Surfaces corresponding to each other of the inclined surface is characterized in that the contact block of the synthetic resin material having elasticity is mounted.

The actuating part has a spiral hole formed in one gripping member, and a ratchet gear part in both directions is formed in the other gripping member, and one side is fixed to the ratchet gear part, and the other side is screwed to the spiral hole and rotates. Characterized in that consists of.

The outer side of the operating shaft between the spiral hole and the ratchet gear portion is characterized in that the spring is further provided for supporting each inner surface of the holding member.

When assembling a bucket having a weight on the rotor rotor of the turbine by the lifting jig-in gripping means of the present invention, assembling work can be easily performed in a short time with a minimum of manpower and excellent safety of the worker, thereby assembling the worker safely and in a short time As the work is made easier, it is possible to shorten the manufacturing period of the turbine and improve productivity.

In addition, the contact area is maximized by the inclined surface formed in the portion that is fixed to the bucket, as well as to increase the gripping force and the sliding to the weight of the bucket, thereby minimizing the assembly operation of the bucket can be made in a safer state. It is to have an effect.

In addition, by minimizing the damage when the bucket is gripped by the contact block having elasticity on the surface in contact with the bucket, the reliability of the assembled bucket also has the effect of increasing as much as possible.

In addition, when the release means to open the holding means to be released more smoothly by the spring, it has the effect of providing the operator with more convenient work requirements.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail with reference to the same technical configuration of the prior art Figure 4 described below.

1 is a perspective view schematically illustrating a main part of the present invention, and FIGS. 2A and 2B are schematic side and front views according to FIG. 1.

In the lifting jig used when assembling the bucket 110 to the rotor 100 of the turbine as shown,

The present invention, in order to assemble a bucket having a weight of about 20 ~ 40kg in the rotor of the turbine to facilitate the assembly work within a short time with a minimum of manpower, while excellent safety of the operator,

The lifting jig 1 is connected to the band provided on the crane which is a conventional lifting means, the suspension ring 12 is formed on the upper side, and the lower side of both sides of the suspension ring 12 to assemble while being widened It is shown that the holding means 10 that can hold and release the blade 112 of the bucket 110 is provided.

The gripping means 10, the upper portion of the suspension ring 12 is coupled to the upper by a conventional pin coupling method is rotatably mounted, the lower portion of the contact portion in direct contact with the blade 112 of the bucket 110 ( It is preferable that 22) is formed, and each of which the operating part 25 is provided is comprised by the holding member 20 so that it may be opened and narrowed in the middle.

The contact portion 22 of the gripping member 20 has a wide contact area when holding a blade of a heavy bucket to increase the gripping force while contacting in an oblique manner in the form of crossing the vertical direction of the braid to minimize slipping with respect to the weight. Preferably, the inclined surface 23 is inclined upwardly downward.

In addition, the contact surfaces 24 of the synthetic resin material having elasticity such as urethane or rubber in a block form are mounted on the surfaces corresponding to each other of the inclined surface 23 so as to prevent the surface of the blade from being damaged when contacting the blade of the bucket. desirable.

On the other hand, the contact block 24 is mounted and fixed to the inclined surface by a conventional fixing method such as bolts or screws, and in particular fastened and fixed in a state in which the head of the bolt or screw is embedded without being protruded into the surface of the contact block It is desirable to prevent the bucket surface of the bucket from being damaged.

The actuating part 25 has a spiral hole 26 formed in one gripping member 20, and the ratchet gear part in both normal directions in which forward and reverse rotation is freely performed by an external force applied to the other gripping member 20. (28) is formed, it is preferable that one side is fixed to the ratchet gear unit 28 and the other side is composed of a working shaft 29 is screwed and rotated to the spiral hole 26. At this time, both ends of the working shaft is formed to protrude outward from the spiral hole and the ratchet gear portion.

Accordingly, the holding member is widened and narrowed as the screwed portion of the spiral hole is rotated by rotating the operating shaft of the portion where the ratchet gear portion is formed by using a conventional wrench or a tool of a type that can be rotated by holding the operating shaft. If necessary, a dedicated lever may be attached to the operating shaft to rotate the operating shaft.

The outer side of the operating shaft 29 between the spiral hole 26 and the ratchet gear portion 28 is provided with a spring (S) for supporting each inner surface of the holding member 20, thereby rotating the operating shaft to hold the holding member It is desirable to make it open with less force when opening. In other words, when the spring is pushed to the holding member to open the holding member by rotating the operating shaft, the assembly can be smoothly opened with less force.

As described above, the present invention is as shown in Figures 3a to 3c, first connecting the band of the crane (not shown) that is the lifting means to the suspension ring 12, then assembled the contact portion 22 of the gripping member 20 After being positioned at the end of the blade 112 of the bucket 110 to be rotated, the operating shaft 29 of the operating portion 25 provided in the gripping member to make the contact portion 22 narrower than the thickness of the bucket blade is inserted In the case of wide open, the operating shaft is rotated to narrow the contact part so as to be in close contact with both sides of the blade of the bucket so as to be closely fixed.

In other words, the operating shaft 29 is screwed to the spiral hole 26 of the one holding member 20 and fixed to the ratchet gear portion 28 in both directions to the other holding member 20, The blade 112 of the bucket can be fixed in close contact as it is opened and narrowed in the direction in which the holding member on the screwed side is rotated by the rotation of the operating shaft.

Thus, when the contact portion 22 of the gripping member 20 is tightly fixed to the end of the blade 112 of the bucket 110 of the dovetail groove 104 formed in the wheel of the rotor 100 to be lifted and assembled by a crane After positioning the bucket 110 in position by the operator to match the dovetail protrusion 114 formed in the bucket 110 to secure the fixing pin, a series of assembly operations can be made safely and simply within a short time.

In addition, the contact portion 22 of the gripping member 20 which is tightly fixed to both sides of the blade of the bucket has a wide contact area with the blade surface while the inclined surface 23 in diagonal contact with the cross section of the vertical direction of the blade. Since it is formed as, the gripping force when fixing the contact with the blade as well as having a condition that can minimize the slip.

In addition, a contact block 24 of a synthetic resin material having elasticity such as urethane or rubber in a block form is formed on a surface of the inclined surface 23 that is in contact with the blade, which is a corresponding surface of the inclined surface 23, in order to prevent the surface of the blade from being damaged when the blade is in contact with the bucket. Is equipped with, it will have a condition that can minimize damage to the blade surface due to contact fixing.

When the bucket is lifted by the gripping means and the assembly is completed on the rotor, the operator rotates the operating shaft of the operating part so that the contact portion of the gripping member fixed to the both sides of the blade of the bucket is separated from the spiral hole and the ratchet gear. The spring is provided on the outer side of the operating shaft between the parts to support the inner surface of the gripping member to have a condition that the operator can easily open the gripping member with less force.

Therefore, when assembling the bucket to the rotor of the turbine, not only can the number of workers be reduced by the gripping means of the present invention, but also the safety and excellent work time can be significantly reduced by minimizing the operator's direct lifting or contact during assembly. In addition to having a condition in which the contact fixed part is not damaged, it will have a highly reliable condition.

1 is a perspective view of main parts schematically showing the present invention.

2a and 2b show schematic side and front views according to FIG. 1;

3a to 3c is a main part showing a state of use of the present invention,

Fig. 3A is a main view showing before holding the blade of the bucket.

Figure 3b is a main view showing a state of holding the blade of the bucket.

3C is a principal view of a state in which a bucket is lifted and assembled;

Figure 4 is a main part showing a state of assembling the bucket to the conventional rotor.

Explanation of symbols for the main parts of the drawings

1: lifting jig 10: holding means

12: suspension ring 20: gripping member

22 contact portion 23 inclined surface

24: contact block 25: operating part

26: spiral 28: ratchet gear unit

29: working shaft 100: rotor

104: Dovetail Home 110: Bucket

112: blade 114: dovetail protrusion

S: Spring

Claims (6)

In the lifting jig used when assembling the bucket to the rotor of the turbine, The lifting jig (1) is formed with a suspension ring (12) suspended by a crane band in the upper portion, holding the blade of the bucket while holding the blade blades on both sides of the suspension ring is provided with a gripping means (10) Lifting jig for a turbine bucket, characterized in that the. According to claim 1, wherein the holding means 10, the upper portion is rotatably mounted on the lower portion of the suspension ring, the lower portion is formed with a contact portion 22 in contact with the blade of the bucket, the operating portion so as to be widened in the middle Lifting jig for a turbine bucket, characterized in that each provided with (25) is composed of a holding member (20). The lifting jig for a turbine bucket according to claim 2, wherein the contact portion (22) of the gripping member (20) is formed as an inclined surface (23) inclined upwardly downward. 4. The lifting jig for a turbine bucket according to claim 3, wherein contact surfaces (24) of synthetic resin material having elasticity are mounted on surfaces corresponding to each other of the inclined surfaces (23). According to any one of claims 2 to 4, wherein the operating portion 25, the spiral hole 26 is formed in one gripper member 20, the ratchet gear in both directions in the other holding member (20). Part 28 is formed, the lifting jig for a turbine bucket, characterized in that the one side is fixed to the ratchet gear portion and the other side is composed of an operating shaft 29 is screwed and rotated to the spiral hole. The method according to claim 5, wherein the outer side of the operating shaft 29 between the spiral hole 26 and the ratchet gear portion 28 is further provided with a spring (S) for supporting each inner surface of the holding member. Lifting jig for turbine bucket.
KR1020090048233A 2009-06-01 2009-06-01 Turbine bucket pulling up jig KR20100129590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090048233A KR20100129590A (en) 2009-06-01 2009-06-01 Turbine bucket pulling up jig

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090048233A KR20100129590A (en) 2009-06-01 2009-06-01 Turbine bucket pulling up jig

Publications (1)

Publication Number Publication Date
KR20100129590A true KR20100129590A (en) 2010-12-09

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KR1020090048233A KR20100129590A (en) 2009-06-01 2009-06-01 Turbine bucket pulling up jig

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160074064A (en) 2014-12-18 2016-06-28 한전케이피에스 주식회사 Generator rotor poll extraction and pull up apparatus
KR20160087302A (en) 2015-01-13 2016-07-21 두산중공업 주식회사 Jig for handling work piece
CN107364789A (en) * 2017-08-29 2017-11-21 天津经纬正能电气设备有限公司 Large-scale reactor star suspender
KR102476503B1 (en) 2022-08-29 2022-12-09 심성구 Water meter protector structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160074064A (en) 2014-12-18 2016-06-28 한전케이피에스 주식회사 Generator rotor poll extraction and pull up apparatus
KR20160087302A (en) 2015-01-13 2016-07-21 두산중공업 주식회사 Jig for handling work piece
CN107364789A (en) * 2017-08-29 2017-11-21 天津经纬正能电气设备有限公司 Large-scale reactor star suspender
KR102476503B1 (en) 2022-08-29 2022-12-09 심성구 Water meter protector structure

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