CN107511634B - A kind of hydraulic turbine main shaft precision turnover mechanism - Google Patents
A kind of hydraulic turbine main shaft precision turnover mechanism Download PDFInfo
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- CN107511634B CN107511634B CN201710984204.7A CN201710984204A CN107511634B CN 107511634 B CN107511634 B CN 107511634B CN 201710984204 A CN201710984204 A CN 201710984204A CN 107511634 B CN107511634 B CN 107511634B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a kind of hydraulic turbine main shaft precision turnover mechanisms, including pedestal, oscilaltion portion, pars contractilis and clamping section, the pars contractilis includes shell, sleeve, screw component, connect block assembly, transmission component and driving assembly, the sleeve is arranged in the shell, internal screw thread is provided in the sleeve, one end of the screw component is embedded in the sleeve, and it is matched with the sleeve, the other end is connected with by transmission component with the driving component, one end of the connection block assembly is arranged outside the shell, another pass through is inserted into the shell, and it is arranged in the sleeve, the axis of the axis for connecting block assembly and the screw component is on the same line.In the present invention, mobile overturning is carried out to connection block assembly by screw component, realizes the overturning of main shaft.
Description
Technical field
The present invention relates to the technical field of hydraulic turbine making apparatus, it is specifically related to a kind of hydraulic turbine main shaft precision and turns over
Rotation mechanism.
Background technique
The hydraulic turbine is the dynamic power machine for the energy of water flow being converted to rotating mechanical energy, it belongs to the turbine in fluid machinery
It is mechanical.Before and after B.C. 100 years, there have been the blanks of the hydraulic turbine for China --- water wheels, for irrigating by lifting water to a higher level with a water pump, etc. and driving grain
Operated implement.The modern hydraulic turbine is then most of to be mounted in power station, is used to driven generator and is generated electricity.In power station, upstream
Water in reservoir guides the hydraulic turbine into through aqueduct, pushes rotary wheel of water turbine rotation, drives electrical power generators.The water for finishing function then leads to
Cross tail water pipeline row downstream.Head is higher, flow is bigger, and the output power of the hydraulic turbine is also bigger.
Therefore the volume of the hydraulic turbine is very huge, this makes hydraulic turbine internal part volume also become larger accordingly, wherein water
Turbine main shaft is the important component of the hydraulic turbine, and both ends are required to welded flange, since main shaft volume is larger therefore welds very
Both ends need successively to weld, therefore cause manufacturing process cumbersome, meanwhile, both ends substep welding then be easy to cause both ends welding uneven
Even situation.Therefore need one kind can be to the device that main shaft is overturn to solve the above problems.
The hydraulic turbine is the dynamic power machine for the energy of water flow being converted to rotating mechanical energy, it belongs to the turbine in fluid machinery
It is mechanical.Before and after B.C. 100 years, there have been the blanks of the hydraulic turbine for China --- water wheels, for irrigating by lifting water to a higher level with a water pump, etc. and driving grain
Operated implement.The modern hydraulic turbine is then most of to be mounted in power station, is used to driven generator and is generated electricity.In power station, upstream
Water in reservoir guides the hydraulic turbine into through aqueduct, pushes rotary wheel of water turbine rotation, drives electrical power generators.The water for finishing function then leads to
Cross tail water pipeline row downstream.Head is higher, flow is bigger, and the output power of the hydraulic turbine is also bigger.
Therefore the volume of the hydraulic turbine is very huge, this makes hydraulic turbine internal part volume also become larger accordingly, wherein water
Turbine main shaft is the important component of the hydraulic turbine, and both ends are required to welded flange, since main shaft volume is larger therefore welds very
Both ends need successively to weld, therefore cause manufacturing process cumbersome, meanwhile, both ends substep welding then be easy to cause both ends welding uneven
Even situation.Therefore need one kind can be to the device that main shaft is overturn to solve the above problems.Existing turnover bracket, it is right
The overturning of main shaft mainly passes through motor driven, but motor speed block, and main shaft volume is excessive, once revolving speed is too fast, is easy to make
The damage of forming apparatus.
Summary of the invention
For the above-mentioned problems in the prior art, it is desirable to provide a kind of to be carried out to the speed angle that main shaft is overturn
Accurate control, prevents from overturning the too fast hydraulic turbine main shaft precision turnover mechanism for leading to equipment damage.
Specific technical solution is as follows:
A kind of hydraulic turbine main shaft precision turnover mechanism, including pedestal, oscilaltion portion, pars contractilis and clamping section, it is described
Pars contractilis includes that shell, sleeve, screw component, connection block assembly, transmission component and driving assembly, the sleeve are arranged in institute
State in shell, internal screw thread be provided in the sleeve, one end of the screw component is embedded in the sleeve, and with the set
Cylinder matches, and the other end is connected with by transmission component with the driving component, and one end of the connection block assembly is arranged in institute
State outside shell, the other end is inserted into the shell, and be arranged in the sleeve, it is described connection block assembly axis with it is described
The axis of screw component is on the same line.
Preferably, the transmission component includes driving gear and the driven gear that is meshed with the driving gear, institute
State driving gear and connect the driving component, the driven gear is connected with the screw component, the driven gear perpendicular to
The upper and lower end faces of driving gear axial direction and diametrically extending formation positioning ring, the driving gear and the driven tooth
Wheel is meshed, and is located between two positioning rings.
Preferably, the screw component includes screw rod and the mandril that is movably arranged in the screw rod, the screw rod edge
The position of axis is provided with a through-hole for running through the screw rod, and the mandril activity is embedded in the through hole, the mandril court
Engaging recess is additionally provided on the end face of one end of the connection block assembly.
Preferably, the driving component includes handwheel and driving motor, the handwheel and the screw rod are backwards to the folder
The one end in tight portion is connected, the driving motor be movably fixed on the shell and with the mandril backwards to the clamping section one
End is connected.
Preferably, the mandril is arranged in backwards to one end of the connection block assembly, the driving tooth in the driven gear
Wheel is connected with the motor shaft of the driving motor.
Preferably, being provided with the first stop collar and the second stop collar in the through-hole, limit is provided on the mandril
Block, the limited block is between first stop collar and second stop collar.
Preferably, the connection block assembly includes link block, connecting rod and elastic component, the link block is cylindric knot
Structure, and the axis of its axis and the mandril is on the same line, one end of the link block towards the clamping section is provided with
Retention bead is provided on the end face of the other end and exists with the snap fit tabs for engaging recesses conjunction, the connecting rod setting
The link block and is connected towards one end of the clamping section with the clamping section, and described elastic component one end connects the shell,
The other end offsets with the retention bead.
Preferably, being provided with the accommodating hole to accommodate the sleeve and link block in the shell, and the accommodating
One end of hole towards the clamping section is provided with gear ring, a support platform is provided on the other end, the support platform is along institute
The axially extending of shell is stated, is provided with draw runner in the support platform.
Preferably, the driving motor is arranged in the support platform by support frame, and support frame as described above connects institute
The one end for stating support platform is provided with the sliding slot matched with the draw runner.
Preferably, the retention bead is ring structure, the retention bead and the accommodating hole clearance fit, the limit
The outer diameter of position protrusion is greater than the internal diameter of the sleeve and is less than the outer diameter of the sleeve.
The good effect of above-mentioned technical proposal is:
(1) in the present invention, mobile overturning is carried out to connection block assembly by screw component, realizes the overturning of main shaft.
(2) while the screw rod is mainly to push link block to move along a straight line, and the mandril is then to drive the screw rod
Rotation, such design can the position to link block accurately controlled, such design is so that the circumferential of link block is transported
It is dynamic and be axially moved non-interference, occur the displacement along screw rod axial direction in rotary course so as to avoid main shaft.
(3) design of first stop collar and the second stop collar is defined the axial displacement of mandril simultaneously, simultaneously
The mandril is driven to move axially together with the screw rod.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of hydraulic turbine main shaft precision turnover mechanism of the present invention；
Fig. 2 is the enlarged drawing in the portion A in Fig. 1；
Fig. 3 is the enlarged drawing in the portion B in Fig. 1；
Fig. 4 is the top view of hydraulic turbine main shaft precision turnover mechanism of the present invention；
Fig. 5 is the enlarged drawing in the portion C in Fig. 4.
In attached drawing, 1, pars contractilis；11, shell；111, support platform；112, draw runner；113, gear ring；12, sleeve；13,
Screw rod；131, the first stop collar；132, the second stop collar；14, mandril；141, engaging recess；142, limited block；143, driven tooth
Wheel；144, positioning ring；15, link block；151, retention bead；152, snap fit tabs；16, elastic component；17, connecting rod；18, hand
Wheel；19, driving motor；191, support frame；192, motor shaft；193, driving gear；2, oscilaltion portion；3, pedestal；4, it clamps
Portion.
Specific embodiment
It is real below in order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention
Example combination attached drawing is applied to be specifically addressed to provided by the invention.
Fig. 1 is the structural schematic diagram of hydraulic turbine main shaft precision turnover mechanism of the present invention；Fig. 2 is the enlarged drawing in the portion A in Fig. 1；
Fig. 3 is the enlarged drawing in the portion B in Fig. 1；Fig. 4 is the top view of hydraulic turbine main shaft precision turnover mechanism of the present invention；Fig. 5 is the portion C in Fig. 4
Enlarged drawing, please refer to shown in Fig. 1 to Fig. 5.Show a kind of preferable hydraulic turbine main shaft precision turnover mechanism, including pedestal 3,
Oscilaltion portion 2, pars contractilis 1 and clamping section 4, wherein oscilaltion portion 2 be arranged on the pedestal 3, and with the pedestal
3 is vertical, and goes up and down along the direction perpendicular to the pedestal 3, and the setting of pars contractilis 1 is being in oscilaltion portion 2, and with it is described
Pedestal 3 parallel and perpendicular to the oscilaltion portion 2, along the oscilaltion portion 2 operation and move, while the pars contractilis
1 is flexible along the direction perpendicular to the oscilaltion portion 2 lifting, and the clamping section 4 is arranged on the pars contractilis 1, the folder
Tight portion 4 is moved synchronously to be clamped to the main shaft, and with the flexible of the pars contractilis 1.
In the utility model, the setting in the oscilaltion portion 2 can be controlled the position on 4 vertical direction of clamping section
System, so that clamping section 4 can be carried out clamping to the center of the main shaft of different height, meanwhile, the setting of the pars contractilis 1
It is flexible towards the direction perpendicular to the main-shaft axis that clamping section 4 can not only be driven, while clamping section 4 can be driven to rotate,
Main shaft is overturn.
Hereinafter, being illustrated with a kind of specific embodiment, it should be pointed out that described in following implementation it
Structure, technique, selection are only to illustrate the feasibility of embodiment, the intention of there is no restriction the scope of the present invention.
Wherein, the pars contractilis 1 includes shell 11, sleeve 12, screw component, connection block assembly, transmission component and drive
Dynamic component, wherein the sleeve 12 is arranged in the shell 11, and internal screw thread, the screw rod group are provided in the sleeve 12
One end of part is embedded in the sleeve 12, and is matched with the sleeve 12, the other end with pass through transmission component and the drive
Dynamic component is connected, and the revolving speed of the output of the driving component is adjusted in the transmission component, and is transferred to the screw rod group
Part.One end of the connection block assembly is arranged outside the shell 11, and the other end is inserted into the shell 11, and is arranged in institute
It states in sleeve 12, the axis of the axis for connecting block assembly and the screw component is on the same line.
Wherein, the transmission component includes driving gear 193 and the driven gear that is meshed with the driving gear 193
143, wherein the driving gear 193 connects the driving component, and the driven gear 143 is connected with the screw component,
In, the driven gear 143 perpendicular to axial upper and lower end faces of the driving gear 193 and diametrically extending, into
And 143 two sides extension of driven gear is made to be provided with positioning ring 144, the driving gear 193 and the driven gear 143
It is meshed, and is located between two positioning rings 144.
The screw component includes screw rod 13 and the mandril 14 that is movably arranged in the screw rod 13, wherein the silk
Bar 13 is provided with a through-hole for running through the screw rod 13 along the position of axis.The mandril 14 is embedded in the through hole, and can
Moved along the through-hole, and the mandril 14 towards it is described connection block assembly one end end face on be additionally provided with engaging recess
141, and then be connected with the connection block assembly, and the length of the mandril 14 is longer than the screw rod 13.
The driving component includes handwheel 18 and driving motor 19, and the handwheel 18 connects the another of the screw rod 13
End, by driving the movement of screw rod 13 so that connection block assembly moves along a straight line, 19 activity of driving motor is fixed
It is connected on the shell 11 and with the other end of the mandril 14, is rotated by driving mandril 14, drive the link block group
Part rotation, and then the clamping section 4 is driven to rotate.
The mandril 14 is arranged in backwards to one end of the connection block assembly, the driving gear in the driven gear 143
193 are connected with the motor shaft 192 of the driving motor 19.
More specifically, the first stop collar 131 and the second stop collar 132 are provided in the through-hole, on the mandril 14
Be provided with the limited block 142 matched with the stop collar, the limited block 142 be located at first stop collar 131 with it is described
Between second stop collar 132, and then 14 synchronizing moving of mandril is driven when the screw rod 13 moves along a straight line.
The connection block assembly includes link block 15, connecting rod 17 and elastic component 16, wherein the link block 15 is circle
Column structure, and the axis of its axis and the mandril 14 is on the same line, the link block 15 is towards the clamping section 4
One end is provided with retention bead 151, and the snap fit tabs matched with the engaging recess 141 are provided on the end face of the other end
152, therefore when the link block 15 fastens with the mandril 14, the mandril 14 drives the link block 15 to rotate.This
Outside, the one end of the link block 15 towards the clamping section 4 is arranged in the connecting rod 17, and is connected with the clamping section 4, into
And clamping section 4 is moved with the movement of the link block 15.Described 16 one end of elastic component connects the shell 11, the other end
It offsets with the retention bead 151, the reset to the link block 15.
More specifically, the accommodating hole to accommodate the sleeve 12 and link block 15 is provided in the shell 11, and
One end of the accommodating hole towards the clamping section 4 is provided with gear ring 113, one end of the elastic component 16 and the gear ring
113 are connected, and the other end is connected with the retention bead 151, the reset to the link block 15.On the shell 11 with setting
A support platform 111 is provided on the opposite end for having blocking material ring one end, the support platform 111 is prolonged along the axial direction of the shell 11
It stretches, is provided with draw runner 112 in the support platform 111.The driving motor 19 is arranged flat in the support by support frame 191
On platform 111, and support frame as described above 191 connects one end of the support platform 111 and is provided with the cunning matched with the draw runner 112
Slot, and then driving motor 19 can be not only supported, meanwhile, but also driving motor 19 can be moved along draw runner 112.
Further, the retention bead 151 is ring structure, the retention bead 151 and the accommodating interporal lacuna
Cooperation.The outer diameter of the retention bead 151 is greater than the internal diameter of the sleeve 12 and is less than the outer diameter of the sleeve 12 simultaneously, in this way
Setting the displacement of the link block 15 is limited.
The elastic component 16 is in compressive state always, between first stop collar 131 and second stop collar 132
Gap be greater than end and the screw rod 13 that the mandril 14 is provided with 141 one end of engaging recess towards 15 one end end of link block
Axial distance between portion.
In the present invention, the specific work process of the pars contractilis 1 are as follows: in initial position, at this point, the retention bead
151 offset with the end of the sleeve 12, and the mandril 14 is inserted into the through-hole of the screw rod 13, limited block 142 and first
Stop collar 131 offsets, and the mandril 14 is located in the screw rod 13 towards one end of the link block 15 at this time.Subsequent handwheel 18
Rotation driving screw rod 13 rotates, and the screw rod 13 is mobile towards 15 direction of link block while rotating, and then pushes
14 synchronizing moving of mandril, since driven gear 143 is matched with the driving gear 193 on mandril 14, positioning ring 144 thereon
Setting, so that driven gear 143 drives 19 synchronizing moving of driving motor, driving motor 19 and then also edge by driving gear 193
Draw runner 112 in the support platform 111 slides, and the screw rod 13 pushes link block 15 to move in the same direction, the elastic component 16 into
The compression of one step.Until moving to predeterminated position, 13 stop motion of screw rod, user pushes away 15 direction of link block described in 14 phase of mandril
Dynamic, so that the engaging recess 141 on mandril 14 and the snap fit tabs 152 on link block 15 match, subsequent driving motor 19 revolves
Turn, and then drives 15 synchronous rotary of link block.The handwheel 18 reversely rotates when reset, and screw rod 13 is driven to rotate, and anti-
To movement, and link block 15 is mobile towards screw rod 13 under the action of elastic component 16 at this time, and mandril 14 is pushed to move synchronously,
It realizes and resets.
In the present invention, the setting of transmission component is preferably adjusted the revolving speed of driving motor 19, avoids revolving speed mistake
Fast damage equipment.The setting of this external gear can not only also increase simultaneously according to the revolving speed of the parameter regulation mandril 14 of gear
Running accuracy.And the setting of positioning ring 144 then makes mandril 14 is synchronous with driving motor 19 to be axially moved.Screw rod 13 mainly to
Link block 15 is pushed to move along a straight line, and the mandril 14 is then that the screw rod 13 is driven to rotate, such design can be to connection
The position of block 15 is accurately controlled, it is such design so that link block 15 circumferential movement and be axially moved it is non-interference,
Occur the displacement axial along screw rod 13 in rotary course so as to avoid main shaft.First stop collar 131 and second simultaneously
The design of stop collar 132 is defined the axial displacement of mandril 14, while driving the mandril 14 and the screw rod 13 together
Axial movement.
The above is only preferred embodiments of the present invention, are not intended to limit the implementation manners and the protection scope of the present invention, right
For those skilled in the art, it should can appreciate that and all replace with being equal made by description of the invention and diagramatic content
It changes and obviously changes obtained scheme, should all be included within the scope of the present invention.
Claims (8)
1. a kind of hydraulic turbine main shaft precision turnover mechanism, including pedestal (3), oscilaltion portion (2), pars contractilis (1) and clamping
Portion (4), which is characterized in that the pars contractilis (1) includes shell (11), sleeve (12), screw component, connection block assembly, transmission
Component and driving assembly, sleeve (12) setting are provided with internal screw thread in the sleeve (12) in the shell (11),
One end of the screw component is embedded in the sleeve (12), and is matched with the sleeve (12), and the other end passes through transmission
Component is connected with the driving component, it is described connection block assembly one end setting the shell (11) outside, the other end is inserted into
In the shell (11), and it is arranged in the sleeve (12), the axis of the connection block assembly and the axis of the screw component
Line is on the same line；The screw component includes screw rod (13) and the mandril that is movably arranged in the screw rod (13)
(14), the screw rod (13) is provided with a through-hole for running through the screw rod (13), mandril (14) activity along the position of axis
Be embedded in the through hole, the mandril (14) towards it is described connection block assembly one end end face on be additionally provided with engaging recess
(141)；It is provided with the first stop collar (131) and the second stop collar (132) in the through-hole, is provided on the mandril (14)
Limited block (142), the limited block (142) is between first stop collar (131) and second stop collar (132).
2. hydraulic turbine main shaft precision turnover mechanism according to claim 1, which is characterized in that the transmission component includes master
Moving gear (193) and the driven gear (143) being meshed with the driving gear (193), driving gear (193) connection
The driving component, the driven gear (143) are connected with the screw component, and the driven gear (143) is perpendicular to actively
The diametrically extending formation positioning ring (144) of the upper and lower end faces of gear (193) axial direction, the driving gear (193) with
The driven gear (143) is meshed, and is located between two positioning rings (144).
3. hydraulic turbine main shaft precision turnover mechanism according to claim 2, which is characterized in that the driving component includes hand
(18) and driving motor (19) are taken turns, the handwheel (18) is connected with the screw rod (13) backwards to the one end of the clamping section (4),
The driving motor (19) be movably fixed on the shell (11) and with the mandril (14) backwards to the clamping section (4) one
End is connected.
4. hydraulic turbine main shaft precision turnover mechanism according to claim 3, which is characterized in that the driven gear (143)
It is arranged in the mandril (14) backwards to one end of the connection block assembly, the driving gear (193) and the driving motor
(19) motor shaft (192) is connected.
5. hydraulic turbine main shaft precision turnover mechanism according to claim 1, which is characterized in that the connection block assembly includes
Link block (15), connecting rod (17) and elastic component (16), the link block (15) be cylindrical-shaped structure, and its axis with it is described
On the same line, one end of link block (15) towards the clamping section (4) is provided with limit convex to the axis of mandril (14)
It rises (151), the snap fit tabs (152) matched with the engaging recess (141), the connection is provided on the end face of the other end
Bar (17) setting is connected in the link block (15) towards one end of the clamping section (4), and with the clamping section (4), described
Elastic component (16) one end connects the shell (11), and the other end offsets with the retention bead (151).
6. hydraulic turbine main shaft precision turnover mechanism according to claim 5, which is characterized in that setting in the shell (11)
There is an accommodating hole to accommodate the sleeve (12) and link block (15), and the accommodating hole is towards the clamping section (4)
One end is provided with gear ring (113), is provided on the other end support platform (111), and the support platform (111) is along described outer
Shell (11) it is axially extending, be provided with draw runner (112) on the support platform (111).
7. hydraulic turbine main shaft precision turnover mechanism according to claim 6, which is characterized in that the driving motor (19) is logical
It crosses support frame (191) to be arranged on the support platform (111), and support frame as described above (191) connects the support platform (111)
One end be provided with the sliding slot matched with the draw runner (112).
8. hydraulic turbine main shaft precision turnover mechanism according to claim 6, which is characterized in that the retention bead (151)
For ring structure, the retention bead (151) and the accommodating hole clearance fit, the outer diameter of the retention bead (151) are greater than
The internal diameter of the sleeve (12) and the outer diameter for being less than the sleeve (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984204.7A CN107511634B (en) | 2017-10-20 | 2017-10-20 | A kind of hydraulic turbine main shaft precision turnover mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710984204.7A CN107511634B (en) | 2017-10-20 | 2017-10-20 | A kind of hydraulic turbine main shaft precision turnover mechanism |
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| Publication Number | Publication Date |
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| CN107511634A CN107511634A (en) | 2017-12-26 |
| CN107511634B true CN107511634B (en) | 2019-03-26 |
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| CN201710984204.7A Active CN107511634B (en) | 2017-10-20 | 2017-10-20 | A kind of hydraulic turbine main shaft precision turnover mechanism |
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| CN111975735B (en) * | 2020-08-22 | 2022-01-14 | 刘洋 | Foldable auto repair slide |
| CN112894436B (en) * | 2021-03-03 | 2022-07-22 | 重庆前卫科技集团有限公司 | Fixed tool and machine tool for machining circumferential surface of waist wheel |
| CN113021024B (en) * | 2021-03-03 | 2022-08-05 | 重庆前卫科技集团有限公司 | Fixing tool for processing circumferential surface of waist wheel, processing system and processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5112293B2 (en) * | 1972-05-31 | 1976-04-17 | ||
| JPH11101707A (en) * | 1997-09-29 | 1999-04-13 | Nikko Co Ltd | Piping material air pressure inspection device |
| CN104057233A (en) * | 2014-06-30 | 2014-09-24 | 洛阳天信重工机械有限公司 | Overturning, welding and tightening device |
| CN105856439B (en) * | 2016-06-01 | 2018-01-23 | 泉州市海恩德机电科技发展有限公司 | A kind of horizontal saw cutting device of sandstone machine |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A precision turning mechanism for main shaft of hydraulic turbine Effective date of registration: 20201015 Granted publication date: 20190326 Pledgee: Jiangxi Lianhua rural commercial bank Limited by Share Ltd. Pledgor: JIANGXI LIANHUA WATER TURBINE FACTORY Co.,Ltd. Registration number: Y2020980006828 |
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