CN115638073A - Sealing method of water pump turbine - Google Patents
Sealing method of water pump turbine Download PDFInfo
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- CN115638073A CN115638073A CN202211565502.XA CN202211565502A CN115638073A CN 115638073 A CN115638073 A CN 115638073A CN 202211565502 A CN202211565502 A CN 202211565502A CN 115638073 A CN115638073 A CN 115638073A
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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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Abstract
A sealing method of a pump turbine comprises the following steps: a. installing a sealing bearing formed by sleeving a sealing bearing inner ring and a sealing bearing outer ring on a main shaft of the water turbine; b. turning an annular groove on a main shaft of the water turbine, fixing a horn-shaped sealing cover in the annular groove, enabling the opening end of the horn-shaped sealing cover to be upward, fixedly installing a baffle ring on an inner ring of a sealing bearing, fixedly connecting the horn-shaped sealing cover with the bottom of the baffle ring, and fixedly installing an inner ring comb-shaped sealing ring on the inner ring of the sealing bearing; c. a bearing seat is fixedly arranged on the outer ring of the sealing bearing, an outer ring comb-shaped sealing ring corresponding to the inner ring comb-shaped sealing ring is arranged in the middle of the bearing seat, and the inner ring comb-shaped sealing ring and the outer ring comb-shaped sealing ring are connected in a clamping manner, so that a clip-shaped sealing structure is formed, and the sealing purpose is achieved; d. the bearing seat bottom is L type return water ring, and the edge of keeping off the ring is intervene in L type return water ring, offers the wash port in the bearing seat bottom, and the height of wash port is less than the top of L type return water ring.
Description
Technical Field
The invention belongs to the technical field of hydraulic turbine sealing in hydraulic engineering, and particularly relates to a sealing method of a main shaft of a hydraulic turbine.
Background
The hydraulic turbine is a power machine for converting the energy of water flow into rotary mechanical energy, and belongs to the turbine machinery in fluid machinery. As early as 100 years before the Yuan, china has developed a rudiment of a water turbine, namely a water wheel, which is used for pumping irrigation and driving grain processing equipment. Modern water turbines are mostly installed in hydropower stations and are used for driving generators to generate electricity. In a hydropower station, water in an upstream reservoir is guided to a water turbine through a water guide pipe to push a water turbine runner to rotate so as to drive a generator to generate electricity. The water after doing work is discharged to the downstream through the tail water pipeline. The higher the water head is, the larger the flow rate is, and the larger the output power of the water turbine is.
One end of a main shaft of a rotating wheel of the water turbine is a near water end, the other end of the main shaft is a far water end, and a generator is installed at the far water end. The main shaft of the turbine runner generates a small amount of water leakage, and the water leakage enters a generator pit along a gap between the main shaft and the shell to prevent the normal operation of generator equipment, so that a sealing device must be installed on the main shaft.
Therefore, it is important to obtain a superior sealing effect of the main shaft of the turbine. The sealing device of the existing water turbine main shaft generally seals by using a packing, but the sealing effect is poor after the sealing device is used for a long time, and water can leak to the far water end of the water turbine main shaft and then enter a generator system to influence the operation of the whole unit.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a sealing method of a pump turbine, which can mount multiple sealing structures among a main shaft, a sealing bearing inner ring and a sealing bearing outer ring.
In order to achieve the purpose, the sealing method of the pump turbine adopts the following technical scheme:
a sealing method of a pump turbine comprises the following steps:
a. installing a sealing bearing on a main shaft of the water turbine, wherein the sealing bearing is formed by sleeving a sealing bearing inner ring and a sealing bearing outer ring outside the sealing bearing inner ring;
b. the rotating part of the water turbine main shaft comprises a water turbine main shaft and a sealing bearing inner ring, processing is carried out on the rotating part of the water turbine main shaft, specifically, an annular groove is turned on the water turbine main shaft, a horn-shaped sealing cover is fixed in the annular groove, the opening end of the horn-shaped sealing cover is upward, a baffle ring is fixedly arranged on the sealing bearing inner ring, the horn-shaped sealing cover is fixedly connected with the bottom of the baffle ring, and an inner ring comb-shaped sealing ring is fixedly arranged on the sealing bearing inner ring at the top of the baffle ring;
c. a bearing seat is fixedly arranged outside the outer ring of the sealed bearing, a mounting hole for mounting a bolt is arranged on the bearing seat, an outer ring comb-shaped sealing ring corresponding to the inner ring comb-shaped sealing ring is arranged in the middle of the bearing seat, and the inner ring comb-shaped sealing ring and the outer ring comb-shaped sealing ring are mutually connected in a clamping manner, so that a clip-shaped sealing structure is formed, and the purpose of sealing is achieved;
d. the bearing seat bottom is L type return water ring, and the edge of keeping off the ring is intervene in L type return water ring, offers the wash port in the bearing seat bottom, and the height of wash port is less than the top of L type return water ring.
In the sealing method of the pump turbine, in the step b, the top of the horn-shaped sealing cover is integrally connected with the vertical pipe, and the top of the vertical pipe is fixedly connected with the baffle ring.
In the step b, a water blocking groove is arranged on the outer surface of the horn-shaped sealing cover, the water blocking groove is spirally arranged, and the spiral direction of the water blocking groove is opposite to the rotating direction of the water turbine.
By adopting the technical scheme, the invention has the following beneficial effects:
the invention relates to a sealing method of a pump turbine, which comprises the steps that firstly, a horn-shaped sealing cover on a main shaft is matched with L-shaped backwater at the lower part of a bearing seat, leaked water is guided out of a drain hole to carry out primary sealing, and secondly, a comb-shaped sealing ring between an outer ring of a sealing bearing and an inner ring of the sealing bearing is mutually clamped to form a clip-shaped sealing structure to achieve secondary sealing. Through two sealings, improve the sealing performance of hydraulic turbine main shaft by a wide margin, ensure the stability of generating set operation.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is a view of the flared seal housing of fig. 1 in the direction of direction a.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
A sealing method of a pump turbine comprises the following steps: as shown in figures 1 and 2 of the drawings,
a. installing a sealing bearing on a main shaft 10 of the water turbine, wherein the sealing bearing is formed by sleeving a sealing bearing inner ring 2 outside a sealing bearing outer ring 1;
b. the rotating part of the water turbine main shaft comprises a water turbine main shaft and a sealing bearing inner ring, and is processed on the rotating part of the water turbine main shaft, specifically, an annular groove is turned on the water turbine main shaft, a horn-shaped sealing cover 11 is fixed in the annular groove, the open end of the horn-shaped sealing cover faces upwards, a baffle ring 6 is fixedly installed on the sealing bearing inner ring, the horn-shaped sealing cover is fixedly connected with the bottom of the baffle ring, and an inner ring comb-shaped sealing ring 4 is fixedly installed on the sealing bearing inner ring at the top of the baffle ring; the rotating water flows on a guide vane of a main shaft of the water turbine, wherein part of the water seeps to the horn-shaped sealing cover, and most of the water automatically flows downwards to the guide vane along the horn-shaped sealing cover under the action of the gravity of the water flow because an upper opening of the horn-shaped sealing cover is larger than a lower opening of the horn-shaped sealing cover;
c. the sealing structure is characterized in that a bearing seat 3 is fixedly installed outside the outer ring 1 of the sealing bearing, a mounting hole for mounting a bolt is formed in the bearing seat, an outer ring comb-shaped sealing ring 5 corresponding to the inner ring comb-shaped sealing ring is installed in the middle of the bearing seat, and the inner ring comb-shaped sealing ring and the outer ring comb-shaped sealing ring are connected in a clamping manner, so that a clip-shaped sealing structure is formed, and the sealing purpose is achieved;
d. the bearing seat is provided with an L-shaped backwater ring 8 at the bottom, the edge of the baffle ring is inserted into the L-shaped backwater ring, the bottom of the bearing seat is provided with a drain hole 12, the height of the drain hole is lower than the top of the L-shaped backwater ring, after the step a, the rotating water flows on a guide vane of a main shaft of the water turbine, part of the rotating water flows onto the horn-shaped sealing cover in a seepage manner, and because the upper opening of the horn-shaped sealing cover is larger than the lower opening, most of the rotating water flows downwards along the horn-shaped sealing cover automatically under the action of the gravity of the water flow, and less of the rotating water flows upwards through the baffle ring and then reaches the L-shaped backwater ring, and then the water is discharged through the drain pipe.
In the sealing method of the water pump turbine, in the step b, the top of the horn-shaped sealing cover is integrally connected with the vertical pipe 7, and the top of the vertical pipe is fixedly connected with the baffle ring.
In the step b, the outer surface of the horn-shaped sealing cover is provided with the water blocking groove 11 which is spirally arranged, and the spiral direction of the water blocking groove is opposite to the rotating direction of the water turbine, so that when the leakage water with vortex flows through the spiral water tank with the opposite direction, the water is blocked from continuously flowing upwards.
The working principle of the invention is as follows:
the upper opening of the horn-shaped sealing cover is larger than the lower opening of the horn-shaped sealing cover, so that the rotating water flows through the guide blade of the main shaft of the water turbine, part of the water flows onto the horn-shaped sealing cover in a seepage manner, and most of the water automatically flows downwards onto the guide blade along the horn-shaped sealing cover under the action of the gravity of the water flow; part of the water flows upwards through the retaining ring, then reaches the L-shaped water return ring, and is discharged by a drain pipe; few parts of the sealing ring reach the square-shaped sealing structure formed by the inner ring comb-shaped sealing ring and the outer ring comb-shaped sealing ring through a gap between the baffle ring and the outer ring comb-shaped sealing ring, and the sealing performance is improved.
The invention relates to a sealing method of a pump turbine, which comprises the steps that firstly, a horn-shaped sealing cover on a main shaft is matched with L-shaped backwater at the lower part of a bearing seat, leaked water is guided out of a drain hole to carry out primary sealing, and secondly, a comb-shaped sealing ring between an outer ring of a sealing bearing and an inner ring of the sealing bearing is mutually clamped to form a clip-shaped sealing structure to achieve secondary sealing. Through two-stage sealing, the sealing performance of the main shaft of the water turbine is greatly improved, and the running stability of the generator set is guaranteed.
Although embodiments of the present invention have been shown and described, what has been described above is merely a preferred embodiment of the present invention, and it should be noted that changes and modifications can be made by those skilled in the art without departing from the overall concept of the present invention, and these should also be considered as the protection scope of the present invention.
Claims (3)
1. A sealing method of a pump turbine is characterized by comprising the following steps:
a. installing a sealing bearing on a main shaft (10) of the water turbine, wherein the sealing bearing is formed by sleeving a sealing bearing inner ring (2) with a sealing bearing outer ring (1);
b. the rotating part of the water turbine main shaft comprises the water turbine main shaft and a sealing bearing inner ring, processing is carried out on the rotating part of the water turbine main shaft, specifically, an annular groove is turned on the water turbine main shaft, a horn-shaped sealing cover (11) is fixed in the annular groove, the open end of the horn-shaped sealing cover is upward, a baffle ring (6) is fixedly arranged on the sealing bearing inner ring, the horn-shaped sealing cover is fixedly connected with the bottom of the baffle ring, and an inner ring comb-shaped sealing ring (4) is fixedly arranged on the sealing bearing inner ring at the top of the baffle ring;
c. a bearing seat (3) is fixedly arranged outside the outer ring (1) of the sealed bearing, a mounting hole for mounting a bolt is formed in the bearing seat, an outer ring comb-shaped sealing ring (5) corresponding to the inner ring comb-shaped sealing ring is arranged in the middle of the bearing seat, and the inner ring comb-shaped sealing ring and the outer ring comb-shaped sealing ring are connected in a clamping manner, so that a clip-shaped sealing structure is formed, and the purpose of sealing is achieved;
d. the bearing pedestal is provided with an L-shaped water return ring (8) at the bottom, the edge of the baffle ring is inserted into the L-shaped water return ring, and the bottom of the bearing pedestal is provided with a drain hole (12) which is lower than the top of the L-shaped water return ring.
2. The method for sealing a pump turbine as claimed in claim 1, wherein a vertical pipe (7) is integrally connected to the top of the bell jar in step b, and the top of the vertical pipe is fixedly connected to the baffle ring.
3. A method for sealing a pump turbine as claimed in claim 1, wherein the water stopping groove (11) is formed on the outer surface of the bell-shaped sealing cover in the step b, and the water stopping groove is spirally formed, and the spiral direction of the water stopping groove is opposite to the rotation direction of the turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211565502.XA CN115638073A (en) | 2022-12-07 | 2022-12-07 | Sealing method of water pump turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211565502.XA CN115638073A (en) | 2022-12-07 | 2022-12-07 | Sealing method of water pump turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115638073A true CN115638073A (en) | 2023-01-24 |
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ID=84948679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211565502.XA Pending CN115638073A (en) | 2022-12-07 | 2022-12-07 | Sealing method of water pump turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115638073A (en) |
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2022
- 2022-12-07 CN CN202211565502.XA patent/CN115638073A/en active Pending
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