CN2142149Y - Helicoidal pump type mainshaft seal for water turbine - Google Patents
Helicoidal pump type mainshaft seal for water turbine Download PDFInfo
- Publication number
- CN2142149Y CN2142149Y CN92221822U CN92221822U CN2142149Y CN 2142149 Y CN2142149 Y CN 2142149Y CN 92221822 U CN92221822 U CN 92221822U CN 92221822 U CN92221822 U CN 92221822U CN 2142149 Y CN2142149 Y CN 2142149Y
- Authority
- CN
- China
- Prior art keywords
- main shaft
- volute pump
- spiral
- pump
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides a spiral type main shaft sealing for a water turbine, in particular to a spiral type main shaft sealing for preventing leakage of the main shaft. A power element is a spiral pump which is arranged on the main shaft. A fixing spiral pump which is corresponding to the spiral pump is arranged on a top cover. And spiral grooves which are arranged in an opposite spiral direction are arranged on the corresponding surfaces of the spiral pump and the fixing spiral pump, and a certain gap is arranged between the spiral grooves which are arranged in an opposite spiral direction. When leaked water flows into the gap between the corresponding spiral grooves, due to the action of the power element, eddy loss can be generated, pressure equilibrium can be established, gapped pressure sealing can be formed, and the purpose of preventing a water flow from leakage can be achieved. The utility model has the advantages of novel design, reliable sealing, high durability, long service life, and strong anti-interference ability.
Description
The utility model is to belong to the sealing that prevents that main shaft from leaking, particularly a kind of volute pump formula hydraulic turbine main shaft sealing.
Hydraulic turbine main shaft sealing commonly used is mainly the contact seal of no gap, as end face seal, packing_seal and dull and stereotyped sealing etc.With regard to its structure, constituted by the end face ring or the lining that are contained in the nonmetallic composite sealing block on the static part and be contained on the rotating spindle.The major defect of this sealing is: wear and tear greatly the fragile inefficacy of Sealing because of directly contacting 1.; 2. when in the big current of sand content, using, continual clean water supply must be arranged, otherwise the Sealing damage is faster; 3. be subject to the influence of other factors such as pipeline blockage, the increase of top cover pressure etc., cause sealing effect undesirable.
It is 91107267.5 wearless and leakproof sealing element for main shaft of hydraulic turbine that the Chinese invention patent communique provides a kind of application number, be to utilize the pump impeller that is contained on the main shaft to realize sealing with being contained in the choked flow impeller serial work on the top cover, its working principle and structure and the utility model are all inequality.
The purpose of this utility model is by being contained in the rotation volute pump on the hydraulic turbine main shaft, corresponding with it fixedly volute pump is contained on the top cover, and on its corresponding surface, be provided with have an opposite spiral chute of certain interval rotation direction, do not contact, do not have substantially the effect of wearing and tearing, good seal performance to reach, overcome the common existing shortcoming of direct contact type hydraulic turbine main shaft sealing.
The technical solution of the utility model is: tighten the rotation volute pump that is connected with the coaxial synchronous rotation of main shaft at hydraulic turbine main shaft, the fixedly volute pump of corresponding cooperation tightens up and is connected on the top cover with it.Rotate on the corresponding surface of volute pump and fixing volute pump and have the opposite spiral chute of rotation direction, and do not contact mutually between the opposite spiral chute of rotation direction; Certain interval is arranged.
Be fastenedly connected with the bolt safety cover between hydraulic turbine main shaft and the rotation volute pump.By the water (flow) direction of leaking, the water channel place before rotating volute pump is provided with the vane pump that is fastenedly connected by bolt safety cover and main shaft.
Top cover and fixedly be fastenedly connected with sealing seat between the volute pump, and in fixing volute pump, be equipped with rotation direction opposite helical groove between the cleaning water pipe that is communicated with of gap.
The above-mentioned rotation volute pump and the fixedly volute pump of corresponding matching with it, and vane pump can be single-stage or multistage.
The utility model is compared with existing direct contact type hydraulic turbine main shaft sealing, has sealing reliably, good endurance, and seal durability is long, and antijamming capability is strong, and the advantage that can not lose efficacy because of the pressure change of sealed water.
Accompanying drawing drawing of the present utility model is described as follows:
Fig. 1: topology view of the present utility model.
The utility model is described in further detail below in conjunction with embodiment:
As shown in Figure 1, the runner connecting shaft bolt 2 on the hydraulic turbine main shaft 1 is connected with bolt safety cover 15 on being fastened on main shaft 1 through attachment screw 3.Rotating volute pump 9 realizes tightening up being connected with main shaft 1 by bolt safety cover 15 with the vane pump 10 that is contained in its front (outside).Having sealing seat 7, the asbestos washer 13 of the fixedly volute pump 6 of gusset 5 by sheet with rib 12 tightens up with top cover 14 and is connected.Fixedly have opposite left hand screw groove 4 of rotation direction and right-hand screw groove 11 on the corresponding surface of volute pump 6 and rotation volute pump 9 with matching, and between left and right sides spiral chute 4 and 11, certain clearance is arranged.The cleaning water pipe 8 that is contained in the fixing volute pump 6 is communicated with gap between spiral chute 4 and 11.
Working procedure of the present utility model and principle thereof are:
Current with certain pressure enter the runner epicoele between water-turbine top cover and runner.The water that flows out from epicoele has three flow directions, and one of them flow direction (promptly leaking) enters vane pump along sealing seat, and under the effect of vane pump, making leaks has consumed portion of energy.Leaking enters the b chamber by vane pump, moves on to flow in the gap between the opposite spiral chute of rotation direction.At this moment, rotate under the volute pump spiral fluted effect opposite, produce constant pressure head, the elimination water flow pressure of leaking with rotation direction on the fixing volute pump at dynamical element.That is to say in the gap of current between the opposite spiral chute of rotation direction that leak and produce eddy current loss, consume its energy, set up pressure balance, leaking can not readvance flows into a chamber, this has just formed gapped wiper seal, thereby reaches the purpose that stops current to leak.
Claims (3)
1, a kind of volute pump formula hydraulic turbine main shaft sealing, include hydraulic turbine main shaft and top cover, it is characterized in that tightening and be connected with the rotation volute pump at hydraulic turbine main shaft, the fixedly volute pump of corresponding setting tightens up and is connected on the top cover with it, rotate on the corresponding surface of volute pump and fixing volute pump and have the opposite spiral chute of rotation direction, do not contact mutually between the opposite spiral chute of rotation direction, have certain interval.
2, volute pump formula hydraulic turbine main shaft sealing according to claim 1 is characterized in that at main shaft and rotates between the volute pump being fastenedly connected with the bolt safety cover, and the water channel place before rotating volute pump also is provided with vane pump.
3, volute pump formula hydraulic turbine main shaft sealing according to claim 1 and 2 is characterized in that at top cover and fixedly is fastenedly connected with sealing seat between the volute pump, in fixing volute pump, also be provided with corresponding spiral chute between the cleaning water pipe that is communicated with of gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92221822U CN2142149Y (en) | 1992-12-03 | 1992-12-03 | Helicoidal pump type mainshaft seal for water turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92221822U CN2142149Y (en) | 1992-12-03 | 1992-12-03 | Helicoidal pump type mainshaft seal for water turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2142149Y true CN2142149Y (en) | 1993-09-15 |
Family
ID=33768541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92221822U Expired - Lifetime CN2142149Y (en) | 1992-12-03 | 1992-12-03 | Helicoidal pump type mainshaft seal for water turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2142149Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451329C (en) * | 2007-07-24 | 2009-01-14 | 天津市天发重型水电设备制造有限公司 | Seal of principal axis of water turbine in type of stay column |
| CN101825179A (en) * | 2010-04-30 | 2010-09-08 | 天津市天发重型水电设备制造有限公司 | Spindle-combined sealing device of mixed-flow water turbine |
| CN101910619B (en) * | 2007-12-28 | 2012-11-14 | 阿尔斯通水电设备法国公司 | Hydraulic machine, energy conversion plant comprising such a machine and method of adjusting such a machine |
| CN105065673A (en) * | 2015-07-16 | 2015-11-18 | 江苏航天水力设备有限公司 | Double-thread sealing device of water pump turbine |
| CN111981133A (en) * | 2020-09-04 | 2020-11-24 | 重庆水轮机厂有限责任公司 | Water turbine with main shaft sealing structure |
| CN113700587A (en) * | 2021-08-23 | 2021-11-26 | 湖南云箭集团有限公司 | Detachable pump plate structure of water turbine runner |
-
1992
- 1992-12-03 CN CN92221822U patent/CN2142149Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451329C (en) * | 2007-07-24 | 2009-01-14 | 天津市天发重型水电设备制造有限公司 | Seal of principal axis of water turbine in type of stay column |
| CN101910619B (en) * | 2007-12-28 | 2012-11-14 | 阿尔斯通水电设备法国公司 | Hydraulic machine, energy conversion plant comprising such a machine and method of adjusting such a machine |
| CN101825179A (en) * | 2010-04-30 | 2010-09-08 | 天津市天发重型水电设备制造有限公司 | Spindle-combined sealing device of mixed-flow water turbine |
| CN105065673A (en) * | 2015-07-16 | 2015-11-18 | 江苏航天水力设备有限公司 | Double-thread sealing device of water pump turbine |
| CN111981133A (en) * | 2020-09-04 | 2020-11-24 | 重庆水轮机厂有限责任公司 | Water turbine with main shaft sealing structure |
| CN113700587A (en) * | 2021-08-23 | 2021-11-26 | 湖南云箭集团有限公司 | Detachable pump plate structure of water turbine runner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |