CN209095432U - Confined space inner bolt fast assembling-disassembling component - Google Patents
Confined space inner bolt fast assembling-disassembling component Download PDFInfo
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- CN209095432U CN209095432U CN201821601185.1U CN201821601185U CN209095432U CN 209095432 U CN209095432 U CN 209095432U CN 201821601185 U CN201821601185 U CN 201821601185U CN 209095432 U CN209095432 U CN 209095432U
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Abstract
The utility model discloses a kind of confined space inner bolt fast assembling-disassembling component, including extension rod, one end of extension rod is equipped with electric wrench connector, the connection blind hole of polygon is offered on the end face of electric wrench connector, the bolt that the other end of extension rod is equipped with polygon connects, using the utility model has the beneficial effects that by extension rod extend the output end of electric wrench can operating space, extension rod is passed through the blade bolt peep hole rear bolt connector on axial fan hub to be inserted into the interior hexagonal disassembly blind hole of bolt end face to be removed, torn open using electric wrench, fill bolt, this device is manually torn open with traditional, specific efficiency of pretending improves 5-7 times.
Description
Technical field
The utility model relates to blower Bolt dismantling fields, and in particular to confined space inner bolt fast assembling-disassembling component.
Background technique
Wind energy is the renewable clear energy sources that current techniques are most mature, most have scale development condition.Wind power generation is behaved
It provides the foundation with natural harmony development.The wind-power electricity generation in China starts from later period the 1950s, from the eighties in last century
The wind turbine investment commercialized running that phase introduces 55kW capacitance grade starts, by the development in twenty or thirty year, the wind-powered electricity generation city in China
Field has been obtained for significant progress, and to the end of the year 2017, China's wind-powered electricity generation adds up grid-connected installed capacity and reaches 164,000,000 kW, occupies
The first in the world.According to " Wind Power Development " 13 " planning " target, the year two thousand twenty China wind-powered electricity generation adds up grid connection capacity and is up to 20500
Ten thousand kilowatts, next three years, China will also increase 41,320,000 kilowatts of wind capacity integrated into grid newly, and wind electricity large-scale development passes through every technology
Ji index further enhances.
Blower is mainly made of pylon, blade, generator, mechanical part and electric component, and wherein blade is to pass through bolt
It is fixed on axial fan hub.When replacing blade connection bolt, the blade bolt peep hole on wheel hub is needed to take out wait tear open
Unload bolt.Since the spacing between connection bolt and axial fan hub is excessively narrow, it is not available electric wrench demounting bolt, it can only
Using division of labor mode hand disassembly.And fan blade connection bolt is numerous, and only has a bolt energy face wheel hub by variable pitch
On blade bolt peep hole, according to manual mode by a demolition, installation bolt, time-consuming and laborious, working efficiency is extremely low.
Utility model content
In order to solve the above technical problems, the utility model provides a kind of confined space inner bolt fast assembling-disassembling component.
Technical solution is as follows: a kind of confined space inner bolt fast assembling-disassembling component, key are:, should including extension rod
One end of extension rod is equipped with electric wrench connector, and the connection that polygon is offered on the end face of the electric wrench connector is blind
Hole, the bolt that the other end of the extension rod is equipped with polygon connect.By adopting the above technical scheme, the electronic of this component is pulled
The output end of hand connector and electric wrench links together, and extends operating for the output end of electric wrench by extension rod
Extension rod is passed through the blade bolt peep hole rear bolt connector on axial fan hub and is inserted into demolition, installation bolt end face by space
Interior hexagonal disassembly blind hole in, i.e., using electric wrench demolition, installation bolt, this device efficiency compared with traditional artificial demolition, installation
Improve 5-7 times.
Preferably, spanner locking slot is offered on the hole wall of above-mentioned connection blind hole, the slot heart line of the spanner locking slot and institute
The hole heart line for stating connection blind hole is vertical.Using this structure, there is the electric wrench of locking steel ball class outstanding for output end, it will
After the output end insertion connection blind hole of electric wrench, the locking steel ball of electric wrench is caught in spanner locking slot, to make electronic
It connects between the output end of spanner and this component and more fastens, prevent from deviating from use process.
Pin hole is offered on above-mentioned electric wrench connector, locking latch is inserted in the pin hole, the locking is inserted
The inner end of pin is plugged in the locking slot after passing through the connection blind hole.Using this structure, for some output ends by inserting
Fixed electric wrench is sold, after the output end insertion connection blind hole of electric wrench, locking latch is passed through on electric wrench
After jack in its inner end insertion spanner locking slot, more fastens, prevent to make to connect between the output end of electric wrench and this component
Only deviate from use process.
Above-mentioned electric wrench connector is cylindrical, and the banding of annular is offered on the cylinder of the electric wrench connector
Slot, cuff has clamp ring in the locking slot, and the clamp ring banding is on the outer end of the locking latch.Using this structure, lead to
End banding of the clamp ring by locking latch is crossed, prevents it from deviating from because of vibration.
Above-mentioned connection blind hole is square hole, and the quadrangle of the square hole is respectively equipped with the chamfering of arc-shaped.Using this knot
Structure, square hole is jumped out out of connection blind hole when can effectively prevent the output end rotation of electric wrench, and the chamfering of square hole quadrangle
On the one hand the stress that tapping can be effectively eliminated is concentrated, while also facilitating the connection of electric wrench Yu electric wrench connector.
The end face depression in centre of above-mentioned electric wrench connector forms interface, and the connection blind hole is located at the interface
Middle part, the end face of the electric wrench connector on the outside of the interface form the abutting face of annular.It is convenient using this structure
Electric wrench is aligned and pushes against with the connection of electric wrench connector.
The above-mentioned head that is bolted is hexagon.Using this structure, it is easier to demolition, installation bolt.
A kind of fan blade bolt disassembly method, key are using the above-mentioned fast quick-detach structure of confined space inner bolt
Part is dismounted, the specific steps are as follows:
(1) impeller location adjusts: by the impeller jiggering of bolt to be replaced to " Y " font position, tightening turbomachine lock, people
Member determines blade (30 ° of two blades obliquely) to be replaced after entering wheel hub, and pitch control cabinet opening is adjusted to " become manually
Paddle " state, and manual variable pitch is tested, by manual variable pitch after test, the bolt on blade to be removed is directed at host
Blade bolt peep hole on wheel hub；
(2) taking-up of bolt: laying down the nut of blade connection bolt end to be removed using hydraulic spanner, then will be electric
Wrench connector is plugged on the output end of electric wrench by the connection blind hole, thus by electric wrench and the confined space
Inner bolt fast assembling-disassembling component fits together, and the inner end of the extension rod is then passed through to the blade bolt on the wheel hub of blower
It is directed at blade connection bolt to be removed after peep hole, blade to be removed is inserted into the bolt connection on extension rod inner end and is connected
In interior hexagonal disassembly blind hole on connecting bolt end face, starting electric wrench splits out bolt；
(3) new bolt is installed: new bolt is inserted at replaced bolt, and utilizes electric wrench and limited sky again
Between inner bolt fast assembling-disassembling component new bolt is tightened, then new nut is tightened on the end of new bolt with hydraulic spanner,
When tightening new nut, 75% target torque is first made a call to the nut with hydraulic spanner, then makes a call to 100% target torque again, wherein
The calculation of target torque is as follows:
The moment of flexure that blade gravity generates blade root:
ω=mgA (1)
In formula: ω is moment of flexure；M is leaf quality；A is horizontal distance of the blade center of gravity to blade root.
Blade root is taken to analyze:
In formula: D is blade root diameter；F1、F2Respectively blade root upper and lower part stress.
It is single bolt strained are as follows:
In formula: n is that the blade on single blade connects bolt number, and the torque F that formula (3) obtains is that each nut needs
Want the size of increased target torque.
By adopting the above technical scheme, when the labor intensity of operator can be effectively reduced, while the disassembly duration can be shortened
Between more than 2/3.
Preferably, the connection bolt of all blades on entire blade is dismounted using " right-angled intersection " method.
The utility model has the advantages that using the utility model has the beneficial effects that extending the output end of electric wrench by extension rod
Can operating space, by extension rod pass through axial fan hub on blade bolt peep hole rear bolt connector be inserted into bolt to be removed
In the Hexagon hole of end face, i.e., using electric wrench demounting bolt, this device improved efficiency compared with traditional mutual disassembly
5-7 times.
By replacing personnel using after the utility model, reducing single branch fan blade, sky that can be narrow in Wind turbine wheel hub
It is interior to carry out two blade exchangings simultaneously, greatly improve fan blade connection bolt replacement efficiency, reduction blower idle time.It is single
Fans (three blades) downtime compares the artificial replacement (being only capable of replacing single branch blade) generallyd use and reduces half.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the bottom view of Fig. 1；
Fig. 3 is the A-A ' cross-sectional view of Fig. 1；
Fig. 4 is the structural schematic diagram of the utility model after removing locking latch and clamp ring；
Fig. 5 is the B-B ' cross-sectional view of Fig. 4；
Fig. 6 is the blower partial structural diagram of bolt to be removed；
Fig. 7 vane stress situation analysis.
Wherein, 1, extension rod；2, electric wrench connector；3, it is bolted head；4, blind hole is connected；5, spanner locking slot；
6, pin hole；7, banding slot；8, face is pushed against；9, clamp ring；10, locking latch；11, interface；12, variable pitch gear wheel；13, leaf
Piece connects bolt；14, the interior hexagonal on blade connection bolt end face dismantles blind hole；15, wheel hub；16, blade bolt peep hole；
17, axial fan hub and pitch variable bearings part.
Specific embodiment
Below with reference to embodiment and attached drawing, the utility model is described in further detail.
Embodiment 1, as shown in Figs. 1-5, a kind of fast quick-detach component of confined space inner bolt, including extension rod 1, the extension
One end of bar 1 is equipped with electric wrench connector 2, and the connection that polygon is offered on the end face of the electric wrench connector 2 is blind
Hole 4, the other end of the extension rod 1 are equipped with the bolt connection 3 of polygon.
The end face depression in centre of the electric wrench connector 2 forms interface 11, and it is described right that the connection blind hole 4 is located at
The end face at 11 middle part of junction, the electric wrench connector 2 in 11 outside of interface forms the abutting face 8 of annular, described
Connection blind hole 4 is square hole, and the quadrangle of the square hole is respectively equipped with the chamfering of arc-shaped, and described to be bolted first 3 be six
It is angular, the electric wrench connector 2, extension rod 1 and be bolted it is first 3 be integrally formed, material be tool steel.
Spanner locking slot 5 is offered on the hole wall of the connection blind hole 4, the slot heart line of the spanner locking slot 5 and the company
The hole heart line for connecing blind hole 4 is vertical.
The electric wrench connector 2 is cylindrical, and the hoop of annular is offered on the cylinder of the electric wrench connector 2
Tight slot 7, the slot bottom of the banding slot 7 offer pin hole 6, and locking latch 10 is inserted in the pin hole 6, and the locking is inserted
The inner end of pin 10 is plugged in the locking slot 5 after passing through the connection blind hole 4, and cuff has clamp ring 9 in the banding slot 7,
For 9 banding of clamp ring on the outer end of the locking latch 10, the clamp ring 9 has elasticity so that it is convenient to pacify installation and dismantling
Unload clamp ring 9.
The diameter of extension rod 1 is φ 20, long 300mm, is bolted first 3 as hexagonal in metric system M10.
Embodiment 2, as shown in fig. 6, axial fan hub and pitch variable bearings part 17, wherein have very on variable pitch gear wheel 12
Blade mostly to be removed connects bolt 13, these blades connection 13 length of bolt is longer, and axial fan hub and pitch variable bearings part
Gap between 17 wheel hub 15 and variable pitch gear wheel 12 is very narrow can not to accommodate lower electric wrench, traditional disassembly mode it
First is that Large-scale Hoisting equipment is hung to ground after removing blade from Wind turbines, manually the bolt on blade is bit by bit twisted
Blade bolt peep hole 16 after out through opening up in advance on wheel hub 15 splits out, replaces, and is then again arrived blade assembling with hanging device
On blower.There are the following problems for this processing mode:
(1) a large amount of human and material resources and financial resources are consumed；
(2) (it is required that wind speed has to be lower than 6 meter per seconds) is influenced by weather；
(3) time-consuming for engineering, influences unit availability；
(4) profession lifting team is needed, process is complicated and there are more security risks, and lifting expense is up to 200,000 yuan.
Another vertical replacing options are then that will need replacing the blade jiggering of blade connection bolt 13 to perpendicular to level
Direction position after having replaced a blade, then will need replacing the another blade jiggering of bolt to same position.This method
The shortcomings that be that personnel labor intensity is big, it is necessary to configure more personnel, and narrow space in wheel hub, can only a group of people grasp simultaneously
Make, jiggering can only once change the bolt of a blade, need to pass in and out wheel hub repeatedly, and engineering takes a long time.
Thus the utility model provides a kind of fan blade bolt disassembly method, and steps are as follows for specific dismounting:
(1) impeller location adjusts: by the impeller jiggering of bolt to be replaced to " Y " font position (i.e. two of them blade court
On, a blade is vertically downward), tighten turbomachine lock, personnel enter after wheel hub determine 30 ° obliquely of two blades be to
Blade is replaced, pitch control cabinet opening is adjusted to " manual variable pitch " state, and test manual variable pitch, by manual after test
Variable pitch, by the blade bolt peep hole on the bolt alignment host wheel hub on blade to be removed；
(2) dismantling device is assembled: for the domestic specific assembling steps of electric wrench for herding field 6905H type are as follows:
Clamp ring 9 is removed, locking latch 10 is taken out, electric wrench connector 2 is plugged in electricity by the connection blind hole 4
On the output end of wrench, locking latch 10 is inserted into pin hole 6 and passes through locking on electric wrench output end after pin hole
The inner end of bolt 10 is plugged in spanner locking slot 5, so that electric wrench and confined space inner bolt fast assembling-disassembling component is tight
It is close to link together, then by 9 banding of clamp ring in banding slot 7 so that the outer end of locking latch 10 be waled, be completed；
(3) taking-up of bolt: all blades connection bolt on the blade of bolt to be replaced is numbered, dynamic to combine
For power UP2000-115 type 2MW unit, a blade shares 64 blade connection bolts, after finishing serial number according to 1-64, first
The old nut on the blade connection bolt of 1-5 serial number is removed with hydraulic spanner, recycles assembled dismantling device by 1-5 sequence
Number blade connection bolt 13 remove, specific demolishing process are as follows:
It is treated after the inner end of the extension rod 1 of assembled dismantling device is passed through the blade bolt peep hole 16 on wheel hub 15
The blade of disassembly connects bolt 13, and the blade to be removed of 3 insertion of bolt connection on 1 inner end of extension rod is connected 13 end of bolt
In interior hexagonal disassembly blind hole 14 on face, starting electric wrench back-outs blade connection bolt 13.
(4) new bolt is installed: new bolt is inserted at replaced bolt, and utilizes electric wrench and limited sky again
Between inner bolt fast assembling-disassembling component new bolt is tightened, then new nut is tightened on the end of new bolt with hydraulic spanner,
It is operated in two times when tightening new nut, first makes a call to 75% target torque for the first time, then make a call to 100% target torque, wherein target
Torque arithmetic mode is as follows:
As shown in fig. 7, blade obliquely is with vertical vane stress difference when impeller is in positive " Y " font:
The moment of flexure that blade root obliquely is generated by blade gravity need to increase a part of torque in original defined torque to offset
Moment of flexure, so that it may guarantee that the pretightning force of bolt reaches requirement.
The moment of flexure that blade gravity generates blade root:
ω=mgA (1)
In formula: ω is moment of flexure；M is leaf quality；A is horizontal distance of the blade center of gravity to blade root.
Blade root is taken to analyze:
In formula: D is blade root diameter；F1、F2Respectively blade root upper and lower part stress.
It is single bolt strained are as follows:
In formula: n is that the blade on single blade connects bolt number, and the torque F that formula (3) obtains is each nut needs
The size of increased target torque.It should be noted that considering that increased target torque must be verified when increasing target torque
Will not make bolt is more than Static Strength Design value, and bolt otherwise can be seriously damaged in longtime running.
Its No. 33-37 diagonal blade is connected with same method again after the blade connection bolt replacement of 1-5 serial number
Disassembling bolts simultaneously more renew bolt, and according to " right-angled intersection " method principle, the blade of 17-21 serial number, 49-53 serial number is connected bolt
Diagonal to remove, installation bolt method is same as above, and so on.
During bulk replacement bolt, most blades connection bolts are not broken, if use with
Past manual type is taken out, it will takes a long time.Taking out an intact blade connection bolt using pipe wrench or spanner needs
10-20 minutes (when encountering the fracture of screw rod O-ring or more sealant, the time is longer) are wanted, and after using this method, it is every average
Blade connection bolt only needs 3 minutes, and it is more than 2/3 that shortening time duration is dismantled while saving personnel's physical strength.
Embodiment 3, a kind of fan blade bolt disassembly method, the present embodiment and embodiment 2 the difference is that, for
The U.S. produces assembling dismantling device in the electric wrench step (2) of Milwaukee type, and detailed process is as follows:
Firstly, removing clamp ring 9, locking latch 10 is taken out, electric wrench connector 2 is inserted by the connection blind hole 4
It is located on the output end of electric wrench, the locking steel ball on electric wrench output end is clamped in locking slot 5, to pull electronic
Hand is closely joined together with confined space inner bolt fast assembling-disassembling component.
Crane replacement is vertically manually replaced and (merely using manually replacing, can only once replace a blade), vertically
Electric wrench replacement (confined space inner bolt fast assembling-disassembling component cooperation electric wrench replacement provided using the utility model, once
A blade can only be replaced) and the utility model provide " Y " font replacement (using the utility model provide confined space inner bolt it is quick
Component cooperation electric wrench replacement is dismounted, two blades can be once replaced), (2MW Wind turbines, day are negative for the benefit of four kinds of methods
Lotus rate 20%, 0.61 yuan/kilowatt hour (containing tax)) comparison is as shown in table 1.
1 four kinds of scheme Efficiency Comparisons of table
In addition, using " Y " font provided by the utility model replacement, it can be achieved that three groups of people (totally 12 people), while going into operation 3
Blower is i.e.: wherein 2 blades of 2 group of 8 people one day 1 Fans of replacement, replacement 2 in another 1 group of 4 people one day each blade, the
It exchanges again i.e. within two days and can reach two days 3 Fans of replacement, by forked working face, realize 4 blades of replacement in 1 day, and use electricity
Wrench is able to maintain long time continuous working, is rested using strong wind weather, and uses artificial replacement, the time of having a rest and
The frequency must greatly increase.
As it can be seen that compared with traditional two schemes, especially compared with renewal cost is up to 200,000 crane replacement, " Y "
Font Replacing Scheme expands working face, reduces crew numbers, cooperate the use of electric wrench reduce labor intensity,
It improves work efficiency, reduces downtime, unit availability is greatly improved.Even occur one in implementation process
The case where 3 blades of Fans are completed on the day of group (8 people).During high-volume is replaced, this programme bring benefit is
Considerable.
Finally, it should be noted that foregoing description is only the preferred embodiment of the utility model, the common skill of this field
Art personnel are under the enlightenment of the utility model, under the premise of without prejudice to the utility model aims and claim, can make
Multiple similar expressions, such transformation are each fallen within the protection scope of the utility model.
Claims (7)
1. a kind of confined space inner bolt fast assembling-disassembling component, it is characterised in that: including extension rod (1), the one of the extension rod (1)
End is equipped with electric wrench connector (2), and the connection blind hole of polygon is offered on the end face of the electric wrench connector (2)
(4), the bolt that the other end of the extension rod (1) is equipped with polygon connects (3).
2. confined space inner bolt fast assembling-disassembling component according to claim 1, it is characterised in that: the connection blind hole
(4) spanner locking slot (5) are offered on hole wall, the hole heart of the slot heart line of the spanner locking slot (5) and connection blind hole (4)
Line is vertical.
3. confined space inner bolt fast assembling-disassembling component according to claim 2, it is characterised in that: the electric wrench connects
Offer pin hole (6) on connector (2), be inserted with locking latch (10) in the pin hole (6), the locking latch (10) it is interior
End is plugged in the spanner locking slot (5) after the connection blind hole (4).
4. confined space inner bolt fast assembling-disassembling component according to claim 3, it is characterised in that: the electric wrench connects
Connector (2) is cylindrical, and the banding slot (7) of annular, the banding slot are offered on the cylinder of the electric wrench connector (2)
(7) interior cuff has clamp ring (9), and clamp ring (9) banding is on the outer end of the locking latch (10).
5. confined space inner bolt fast assembling-disassembling component according to claim 1-4, it is characterised in that: the company
It connects blind hole (4) and is square hole, the quadrangle of the square hole is respectively equipped with the chamfering of arc-shaped.
6. confined space inner bolt fast assembling-disassembling component according to claim 5, it is characterised in that: the electric wrench connects
The end face depression in centre of connector (2) forms interface (11), and the connection blind hole (4) is located in the middle part of the interface (11), institute
The end face for stating the electric wrench connector (2) on the outside of interface (11) forms the abutting face (8) of annular.
7. confined space inner bolt fast assembling-disassembling component according to claim 1, it is characterised in that: described to be bolted head
It (3) is hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601185.1U CN209095432U (en) | 2018-09-29 | 2018-09-29 | Confined space inner bolt fast assembling-disassembling component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821601185.1U CN209095432U (en) | 2018-09-29 | 2018-09-29 | Confined space inner bolt fast assembling-disassembling component |
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| Publication Number | Publication Date |
|---|---|
| CN209095432U true CN209095432U (en) | 2019-07-12 |
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ID=67154052
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821601185.1U Active CN209095432U (en) | 2018-09-29 | 2018-09-29 | Confined space inner bolt fast assembling-disassembling component |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202797A (en) * | 2018-09-29 | 2019-01-15 | 国电重庆风电开发有限公司 | Confined space inner bolt fast assembling-disassembling component and fan blade bolt disassembly method |
-
2018
- 2018-09-29 CN CN201821601185.1U patent/CN209095432U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109202797A (en) * | 2018-09-29 | 2019-01-15 | 国电重庆风电开发有限公司 | Confined space inner bolt fast assembling-disassembling component and fan blade bolt disassembly method |
| CN109202797B (en) * | 2018-09-29 | 2024-01-02 | 国电重庆风电开发有限公司 | Quick bolt dismounting component in limited space and fan blade bolt dismounting method |
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Address after: 409109 Miaoba Formation, Wolong Village, Shazi Town, Shizhu Tujia Autonomous County, Chongqing Patentee after: Guoneng Chongqing Wind Power Development Co.,Ltd. Address before: 409109 Miaoba Formation, Wolong Village, Shazi Town, Shizhu Tujia Autonomous County, Chongqing Patentee before: GUODIAN CHONGQING WIND POWER DEVELOPMENT Co.,Ltd. |