CN117963769A - Hydraulic turbine lifting system and use method - Google Patents
Hydraulic turbine lifting system and use method Download PDFInfo
- Publication number
- CN117963769A CN117963769A CN202410391490.6A CN202410391490A CN117963769A CN 117963769 A CN117963769 A CN 117963769A CN 202410391490 A CN202410391490 A CN 202410391490A CN 117963769 A CN117963769 A CN 117963769A
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- hydraulic
- lifting
- lifting device
- water turbine
- turbine
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- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000009434 installation Methods 0.000 claims abstract description 20
- 230000001360 synchronised effect Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 230000036316 preload Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Hydraulic Turbines (AREA)
Abstract
The invention belongs to the technical field of water turbine installation, and particularly relates to a water turbine lifting system and a use method thereof, wherein the water turbine lifting system comprises a hydraulic control system and a plurality of hydraulic lifting devices; the hydraulic lifting device comprises a lifting supporting seat, a lifting driving cylinder arranged on the lifting supporting seat, a screw rod mounting shaft used for being lifted by the lifting driving cylinder, and a height sensor arranged at the edge of the lifting driving cylinder; the hydraulic control system comprises a parallel hydraulic pipeline with a plurality of output branches, an electrohydraulic proportional throttle valve arranged on the output branches, a hydraulic pump arranged at the input end of the hydraulic pipeline, and a controller electrically connected with the height sensor, the electrohydraulic proportional throttle valve and the hydraulic pump. The lifting height of the hydraulic lifting device is obtained in real time through the height sensor, and the controller adjusts the opening of the electro-hydraulic proportional throttle valve on the output branch of the corresponding hydraulic lifting device in real time according to the feedback data of the height sensor, so that the efficient synchronous lifting of the water turbine is realized.
Description
Technical Field
The invention belongs to the technical field of water turbine installation, and particularly relates to a water turbine lifting system and a use method thereof.
Background
After the water turbine overhauls, the reinstallation work for the water turbine is important. In the process of the water turbine returning, the synchronous lifting installation of the water turbine is used as the heavy weight. The conventional method is that a plurality of screw jacks are used for manual operation, synchronous lifting is difficult to achieve by the manual operation, and the screw jacks are easy to damage due to poor synchronism. There are also ways of performing lifting operations using a plurality of hydraulic stretchers. At present, in the lifting process, the method still needs to rely on manual monitoring, and whether the hydro-turbine unit is balanced in the lifting process is judged by comparing whether the stretching distances of the stretchers are equal. Such means of relying on human monitoring are still prone to poor lifting synchronicity. Further, the mounting efficiency is low, and thus, it is required to be solved.
Disclosure of Invention
The invention aims to provide a water turbine lifting system and a using method thereof, which are used for solving the technical problems of poor water turbine installation lifting synchronism and low installation efficiency.
The invention is realized by the following technical scheme:
In a first aspect, a hydraulic turbine lifting system is provided that includes a hydraulic control system and a plurality of hydraulic lifting devices;
the hydraulic lifting device comprises a lifting supporting seat, a lifting driving cylinder arranged on the lifting supporting seat, a screw rod mounting shaft used for being lifted by the lifting driving cylinder, and a height sensor arranged at the edge of the lifting driving cylinder;
The hydraulic control system comprises a parallel hydraulic pipeline with a plurality of output branches, an electrohydraulic proportional throttle valve arranged on the output branches, a hydraulic pump arranged at the input end of the hydraulic pipeline, and a controller electrically connected with the height sensor, the electrohydraulic proportional throttle valve and the hydraulic pump.
Furthermore, the lifting support seat is in a circular tube shape, a strip-shaped opening is formed in the tube body, and the length direction of the strip-shaped opening is parallel to the surface where the tube body port is located.
Further, the lifting driving cylinder comprises a lifting driving shell, a lifting driving ring and a hydraulic joint; the lifting drive shell and the lifting drive ring are annular, an annular groove is formed in one end face of the lifting drive shell, the lifting drive ring is matched with the annular groove and is arranged in the annular groove, sealing pieces are arranged on the inner annular face and the outer annular face of the lifting drive ring, and one face, close to the bottom of the annular groove, of the lifting drive ring is formed into a sealing cavity with the annular groove through the sealing pieces; the hydraulic joint is communicated with the sealing cavity through a pipeline.
Further, the lifting support seat and the other end face of the lifting driving shell, which is not provided with the annular groove, are integrally manufactured or clamped.
Further, the screw mounting shaft is in a circular tube shape, the outer diameter of the screw mounting shaft is smaller than the inner diameter of the lifting driving cylinder, threads are arranged in the tube, one end of the screw mounting shaft is provided with a flange plate, and when the screw mounting shaft is used, the flange plate is arranged on the lifting driving ring.
Further, the hydraulic connector is connected with the output branch to form a pressure liquid passage.
In a second aspect, a method of using a hydraulic turbine lifting system is provided, comprising the steps of:
A plurality of bolts penetrate through the water turbine and the mounting flange holes of the to-be-mounted surface from one side of the water turbine and are in threaded connection with a screw mounting shaft in the hydraulic lifting device on one side of the to-be-mounted surface;
Setting a first tension value required to be provided by the hydraulic lifting device based on the weight parameter of the water turbine;
The hydraulic system starts pumping pressure liquid to each output branch circuit based on the set first tension value;
Based on the height information fed back by the height sensor on each hydraulic lifting device, the opening of the corresponding electro-hydraulic proportional throttle valve is controlled by the controller to enable each hydraulic lifting device to synchronously lift, so that the synchronous lifting of the water turbine is realized.
Further, the method further comprises the following steps: after the water turbine is synchronously lifted to the installation position, a fixing bolt and a matched nut are installed at an installation flange hole where the hydraulic lifting device is not used;
and then, at the mounting flange hole of the hydraulic lifting device, a fixing bolt and a matched nut are mounted.
Further, the hydraulic lifting device is used for fastening the bolts based on the preset pretightening force.
Further, the hydraulic lifting device is used for fastening the bolt based on preset pretightening force, and specifically comprises the following steps:
The load loss parameter M is obtained by the following formula:
wherein a and b are coefficients, l n is the length from nut to nut in the bolt, and d is the diameter of the bolt rod;
Acquiring a second tension value based on the product of the preset pretightening force and the load loss parameter M;
the hydraulic lifting device stretches the bolt based on the second tension value and simultaneously tightens the nut.
The technical scheme of the invention has at least the following advantages and beneficial effects:
The lifting height of the hydraulic lifting device is obtained in real time by arranging the height sensor, and when the lifting speed of the hydraulic lifting device is too high or too low to cause inconsistent lifting height during working, the controller adjusts the opening of the electro-hydraulic proportional throttle valve on the output branch of the corresponding hydraulic lifting device in real time according to the feedback data of the height sensor, so that the lifting speed of each hydraulic lifting device is kept consistent, and synchronous lifting of the water turbine is realized; after the lifting is finished, the hydraulic turbine lifting system can also fasten bolts according to the target pretightening force; finally, the efficient installation of the water turbine is realized.
Drawings
FIG. 1 is a schematic view of a hydraulic lifting device according to the present invention;
FIG. 2 is a cross-sectional view of the hydraulic lifting device of the present invention;
Fig. 3 is a flow chart of the method of the present invention.
The device comprises a 1-lifting support seat, a 2-lifting driving shell, a 3-lifting driving ring, a 4-screw mounting shaft, a 5-hydraulic connector and a 6-height sensor.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
A hydraulic turbine lifting system comprising a hydraulic control system and a plurality of hydraulic lifting devices;
As shown in fig. 1 and 2, the hydraulic lifting device includes a lifting support base, a lifting driving cylinder disposed on the lifting support base, a screw mounting shaft for being lifted by the lifting driving cylinder, and a height sensor disposed at an edge of the lifting driving cylinder.
The lifting support seat is in a circular tube shape, a strip-shaped opening is formed in the tube body, and the length direction of the strip-shaped opening is parallel to the surface where the tube body port is located. When used as a tightening bolt, the strip opening is used for an insertion tool to tighten a nut on the bolt in the lifting support seat; specifically, the inner diameter of the lifting support seat is larger than the outer diameter of the screwing device sleeved on the nut, the screwing device is provided with an insertion hole, and the screwing lever is formed by inserting an insertion tool into the insertion hole, so that the screwing of the bolt and the nut can be realized.
The lifting driving cylinder comprises a lifting driving shell, a lifting driving ring and a hydraulic joint; the lifting drive shell and the lifting drive ring are annular, an annular groove is formed in one end face of the lifting drive shell, the lifting drive ring is matched with the annular groove and is arranged in the annular groove, sealing pieces are arranged on the inner annular face and the outer annular face of the lifting drive ring, and one face, close to the bottom of the annular groove, of the lifting drive ring is formed into a sealing cavity with the annular groove through the sealing pieces; the hydraulic joint is communicated with the sealing cavity through a pipeline.
The lifting support seat and the other end surface of the lifting drive shell, which is not provided with the annular groove, are integrally manufactured or clamped. When the lifting support seat and the lifting drive shell are arranged to be clamped in two parts, flexible disassembly is convenient to achieve fastening of nuts with different sizes.
The screw rod installation shaft is in a circular tube shape, the outer diameter of the screw rod installation shaft is smaller than the inner diameter of the lifting driving cylinder, threads are arranged in the tube, one end of the screw rod installation shaft is provided with a flange plate, and when the screw rod installation shaft is used, the flange plate is arranged on the lifting driving ring. Specifically, the threads in the pipe are used for being in threaded connection with the bolts, and lifting and fastening of the mounting bolts, which can be used for the hydraulic turbine, are performed.
The hydraulic joint is connected with the output branch to form a pressure liquid passage; the hydraulic control system controls pressure liquid to enter and exit the sealing cavity through the output branch and the hydraulic connector in sequence, so that the lifting driving ring is driven.
The hydraulic control system comprises a parallel hydraulic pipeline with a plurality of output branches, an electrohydraulic proportional throttle valve arranged on the output branches, a hydraulic pump arranged at the input end of the hydraulic pipeline, and a controller electrically connected with the height sensor, the electrohydraulic proportional throttle valve and the hydraulic pump.
The lifting height of the hydraulic lifting device is obtained in real time by arranging the height sensor, and when the lifting speed of the hydraulic lifting device is too high or too low to cause inconsistent lifting height during working, the controller adjusts the opening of the electro-hydraulic proportional throttle valve on the output branch of the corresponding hydraulic lifting device in real time according to the feedback data of the height sensor, so that the lifting speed of each hydraulic lifting device is kept consistent, and synchronous lifting of the water turbine is realized; after the lifting is finished, the hydraulic turbine lifting system can also fasten bolts according to the target pretightening force; finally, the efficient installation of the water turbine is realized.
In a second aspect, a method of using a hydraulic turbine lifting system is provided, as shown in fig. 3, comprising the steps of:
S1, a plurality of bolts penetrate through the water turbine and mounting flange holes on the to-be-mounted surface from one side of the water turbine and are in threaded connection with screw mounting shafts in the hydraulic lifting device on one side of the to-be-mounted surface.
In general, the mounting flange of the water turbine is provided with a plurality of mounting flange holes, at least three sets of hydraulic lifting devices are needed for maintaining the balance during lifting, and at least three mounting flange holes are needed to be occupied; taking setting three groups of hydraulic lifting devices as an example, the number of mounting flange holes among each group of hydraulic lifting devices is consistent; and further, the lifting balance can be ensured.
S2, setting a first tension value required to be provided by the hydraulic lifting device based on the weight parameter of the water turbine.
In general, the weight of the hydraulic turbine needs to be equally distributed to each hydraulic lifting device, so that each hydraulic lifting device adopts a first tension value to perform lifting operation.
And S3, the hydraulic system starts pumping pressure liquid to each output branch based on the set first tension value.
S4, based on height information fed back by the height sensors on the hydraulic lifting devices, the opening of the corresponding electro-hydraulic proportional throttle valve is controlled by the controller to enable the hydraulic lifting devices to synchronously lift, and the synchronous lifting of the water turbine is achieved.
After the hydraulic turbine is lifted to the installation position efficiently and stably through the hydraulic control system, bolt fastening is needed.
And therefore also comprises: s5, after the water turbine is synchronously lifted to the installation position, fixing bolts and matched nuts are installed at the installation flange holes where the hydraulic lifting device is not used. Mounting flange holes without hydraulic lifting devices, i.e. mounting flange holes between hydraulic lifting devices; after the fixing bolts and the matched nuts are installed, the water turbine realizes preliminary fixation; the hydraulic lifting device can be recovered at this time.
S6, after the hydraulic lifting device is recovered, fixing bolts and matched nuts are installed at the positions of the installation flange holes of the hydraulic lifting device.
Because the large-scale apparatus of the water turbine has larger weight and severe working environment, higher stability is required; therefore, the bolts need to be pre-tightened, and the bolts are prevented from loosening during working.
And S7, fastening the bolts by adopting a hydraulic lifting device based on a preset pretightening force.
Wherein, S7 specifically comprises:
s71, acquiring a load loss parameter M, wherein the load loss parameter M is acquired by the following formula:
Wherein a and b are coefficients, l n is the length from nut to nut in the bolt, and d is the diameter of the bolt rod; in a specific implementation, a may be assigned a value of 1.15 and b may be assigned a value of 2, depending on the practice.
S72, obtaining a second tension value based on the product of the preset pretightening force and the load loss parameter M.
S73, the hydraulic lifting device stretches the bolt based on the second tension value and simultaneously tightens the nut; thereby achieving the pretension of multiple bolts and guaranteeing the long-term stable operation of the water turbine.
According to the technical scheme, synchronous and stable lifting of the water turbine can be realized, and the device can be used for further realizing pre-tightening of the mounting bolts so as to ensure the reliability of mounting, and one set of device solves two difficulties in mounting; the installation efficiency of the hydraulic turbine is greatly improved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The hydraulic turbine lifting system is characterized by comprising a hydraulic control system and a plurality of hydraulic lifting devices;
the hydraulic lifting device comprises a lifting supporting seat, a lifting driving cylinder arranged on the lifting supporting seat, a screw rod mounting shaft used for being lifted by the lifting driving cylinder, and a height sensor arranged at the edge of the lifting driving cylinder;
The hydraulic control system comprises a parallel hydraulic pipeline with a plurality of output branches, an electrohydraulic proportional throttle valve arranged on the output branches, a hydraulic pump arranged at the input end of the hydraulic pipeline, and a controller electrically connected with the height sensor, the electrohydraulic proportional throttle valve and the hydraulic pump.
2. The hydraulic turbine lifting system as recited in claim 1, wherein the lifting support is tubular, and the tubular body is provided with a strip-shaped opening, and the length direction of the strip-shaped opening is parallel to the surface of the tubular body at which the port is located.
3. The hydraulic turbine lifting system of claim 1, wherein the lift drive cylinder comprises a lift drive housing, a lift drive ring, and a hydraulic joint; the lifting drive shell and the lifting drive ring are annular, an annular groove is formed in one end face of the lifting drive shell, the lifting drive ring is matched with the annular groove and is arranged in the annular groove, sealing pieces are arranged on the inner annular face and the outer annular face of the lifting drive ring, and one face, close to the bottom of the annular groove, of the lifting drive ring is formed into a sealing cavity with the annular groove through the sealing pieces; the hydraulic joint is communicated with the sealing cavity through a pipeline.
4. A hydraulic turbine lifting system as claimed in claim 3 wherein the lifting support is integrally formed with or snap-fitted to the other end face of the lifting drive housing which is not provided with an annular groove.
5. A hydraulic turbine lifting system as claimed in claim 3 wherein the screw mounting shaft is tubular and has an outer diameter less than the inner diameter of the lifting drive cylinder, the tube being internally threaded and having a flange at one end thereof which, in use, is disposed on the lifting drive ring.
6. A hydraulic turbine lifting system as claimed in claim 3 wherein the hydraulic fitting is connected to the output branch to form a pressure fluid passageway.
7. The application method of the hydraulic turbine lifting system is characterized by comprising the following steps of:
A plurality of bolts penetrate through the water turbine and the mounting flange holes of the to-be-mounted surface from one side of the water turbine and are in threaded connection with a screw mounting shaft in the hydraulic lifting device on one side of the to-be-mounted surface;
Setting a first tension value required to be provided by the hydraulic lifting device based on the weight parameter of the water turbine;
The hydraulic system starts pumping pressure liquid to each output branch circuit based on the set first tension value;
Based on the height information fed back by the height sensor on each hydraulic lifting device, the opening of the corresponding electro-hydraulic proportional throttle valve is controlled by the controller to enable each hydraulic lifting device to synchronously lift, so that the synchronous lifting of the water turbine is realized.
8. The method of using a hydraulic turbine lifting system as recited in claim 7, further comprising: after the water turbine is synchronously lifted to the installation position, a fixing bolt and a matched nut are installed at an installation flange hole where the hydraulic lifting device is not used;
and then, at the mounting flange hole of the hydraulic lifting device, a fixing bolt and a matched nut are mounted.
9. The method of claim 8, further comprising tightening the bolts with a hydraulic lifting device based on a predetermined preload.
10. The method for using the hydraulic turbine lifting system according to claim 9, wherein the bolts are fastened by using a hydraulic lifting device based on a preset pretightening force, specifically:
The load loss parameter M is obtained by the following formula:
wherein a and b are coefficients, l n is the length from nut to nut in the bolt, and d is the diameter of the bolt rod;
Acquiring a second tension value based on the product of the preset pretightening force and the load loss parameter M;
the hydraulic lifting device stretches the bolt based on the second tension value and simultaneously tightens the nut.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410391490.6A CN117963769B (en) | 2024-04-02 | 2024-04-02 | Hydraulic turbine lifting system and use method |
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| CN202410391490.6A CN117963769B (en) | 2024-04-02 | 2024-04-02 | Hydraulic turbine lifting system and use method |
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| CN117963769B CN117963769B (en) | 2024-06-21 |
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| CN117963769B (en) | 2024-06-21 |
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