CN109779813A - Floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units - Google Patents
Floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units Download PDFInfo
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- CN109779813A CN109779813A CN201910081503.9A CN201910081503A CN109779813A CN 109779813 A CN109779813 A CN 109779813A CN 201910081503 A CN201910081503 A CN 201910081503A CN 109779813 A CN109779813 A CN 109779813A
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Abstract
The invention discloses floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units, comprising the following steps: when a, unit maintenance phase or shutdown, peep hole is arranged on lower oil collecting pot；B, observation platform is set up in unit collector ring room；C, after compressor emergency shutdown, oil stain situation under being observed on observation platform by peep hole on floating-bush underlying item is come floating-bush oil leak amount size under assessing.Observation method of the method based on fluid seals technology in the present invention; sensor and its related software hardware device are not installed additionally; reduce the secondary injury to unit; and inspection and evaluation is carried out in compressor emergency shutdown; injury of the rotary part to staff is avoided, while compensating for the technological gap that the lower floating-bush inside axial-flow rotary propeller type turbine-generator units oil head is unable to monitor in non-turn(a)round.
Description
Technical field
The present invention relates to Hydropower Plant fault diagnosis technology field, in particular to a kind of axis circulation based on sealing technique
Floating-bush method for diagnosing faults under paddle turbine-generator units.
Background technique
Axial-flow rotary propeller type turbine-generator units are a kind of common units of hydropower industry.Movable propeller turbine refers to water flow
Flow energy is converted to the reaction turbine of mechanical energy, guide vane along its blade from axial outflow into people's runner by axial direction
It is in combination relationship with blade, so that the hydraulic turbine be made to keep high-efficiency operation.The output power of turbine-generator units is mainly by work
Make head, cross machine flow, turbine efficiency decision.Working head is mainly high-rise by hydraulic turbine installation and upstream water level determines,
Installation high level can not be changed after determining, and upstream water level changes with upland water situation, is mainly determined by natural cause, Wu Fashi
When adjust.Turbine efficiency is determined in Design of Hydraulic Turbine, is also difficult to change in later period operation.Movable propeller turbine
Cross machine flow and can adjust guide vane opening by speed-regulating system to adjusting machine flow, while adjusting blade aperture to protect
Hold optimum efficiency.
In order to keep optimum efficiency, movable propeller turbine group critical component more than Francis turbine ---
Blade.The blade of axial-flow rotary propeller type turbine-generator units can be with the rotation together of the big axis of the hydraulic turbine, additionally it is possible to guide vane joint
Cooperation opens or closes corresponding aperture, and therefore, the adjusting oil system of blade is an extremely complex system, when it adjusts oil
The rotating part of system is more difficult to find when something goes wrong.The adjusting oil system of unit blade is provided with oil head, operation oil
The components such as pipe, blade operating mechanism.Floating-bush inside oil head is transmitting pressure oil between fixation member and rotatable parts
Pressure oil in static pipeline is introduced into the operating oil line road rotated in big axis and guarantees that pressure oil will not largely be let out by critical component
Leakage, to efficiently adjust blade.In order to guarantee that pressure oil will not be leaked largely, oil head must have good sealing performance anti-
Only pressure oil leaks, and entire oil head is a sealing device and rotates big axis cooperation with the hydraulic turbine, therefore runs in unit
When be difficult to monitor oil head and the wherein health status of floating-bush.
Lower floating-bush serious wear or tile kilning phenomenon all once occurred for the power station of many Kaplan turbines, finally led
Cause can not normal regulating blade accident.Since lower floating-bush is mounted on inside oil head, directly it can not observe and monitor, only
Oil head is decomposed in unit maintenance phase ability chance and to lower floating-bush detailed inspection.Some power station initial stages install on operating oil line
Throw sensor, but the shaking of actual moving process medium processing oil pipe is bigger, and especially unit is in startup-shutdown process medium processing oil
Pipe shaking is bigger, often breaks sensor, therefore monitor oil head effect by the method for installation throw sensor and pay no attention to
Think.
Summary of the invention
Present invention aims at: for the lower floating-bush inside axial-flow rotary propeller type turbine-generator units oil head in non-maintenance
The problem that phase can not be monitored provides floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units, uses
Observation method based on fluid seals technology is existed with making up the lower floating-bush inside axial-flow rotary propeller type turbine-generator units oil head
The technological gap that non-turn(a)round is unable to monitor.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
Floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units, comprising the following steps:
A, unit maintenance phase or when shutting down, observation of the setting for floating-bush oil leak situation under observing on lower oil collecting pot
Hole；
B, the observation platform for observation is set up in unit collector ring room；
C, after compressor emergency shutdown, floating-bush underlying item under operator station is observed on observation platform by peep hole
On oil stain situation assess lower floating-bush oil leak amount size.
The present invention on lower oil collecting pot by unit maintenance phase or shutdown, being arranged peep hole and in unit current collection
The observation platform for observation is set up in ring casing, after compressor emergency shutdown, operator station on observation platform by peep hole into
Row observes the oil stain situation on lower floating-bush underlying item to assess lower floating-bush oil leak amount size；This method is based on Fluid Sealing
The observation method of technology not install sensor and its related software hardware device additionally, reduce the secondary injury to unit,
And inspection and evaluation is carried out in compressor emergency shutdown, injury of the rotary part to staff is avoided, while compensating for axis stream
The technological gap that lower floating-bush inside rotary propeller type turbine-generator units oil head is unable to monitor in non-turn(a)round.
As a preferred solution of the present invention, in the step a, the peep hole is to be drilled with circular hole on lower oil collecting pot and pacify
It fills transparent and antivibration glass to be formed, has not only been convenient for that glass is drilled and installed on existing lower oil collecting pot, but also meet and penetrate peep hole
It carries out observing lower floating-bush oil leak situation.
As a preferred solution of the present invention, in the step b, the observation platform ride upon current collection ring casing mandoor with by
Under oily device between oil collecting pot, the observation platform be both convenient for operator station on observation platform by peep hole carry out observation float downward
Dynamic watt, and advantageously ensure that personnel safety.
As a preferred solution of the present invention, in the step c, under assessment when floating-bush oil leak amount size, by unit
Gap is reduced to gap between two concentric cylinders between operating oil line and lower floating-bush, and oil leak amount can be according to cylindrical gap
Oil leak formula calculates:
Wherein, Q is oil leak amount, and L is lower floating-bush height, and β is dielectric property parameter, and D is operating oil line diameter, and p is pressure
Pressure and normobaric difference in power tank, the gap between operating oil line and floating-bush h.
As a preferred solution of the present invention, it is assumed that in formula (1)For definite valueThen formula (1) can be rewritten as:
Wherein, between operating oil line and floating-bush gap h design value between 0.1~0.15mm.
Due to the height L of floating-bush lower in actual moving process, dielectric property parameter beta, operating oil line diameter D, pressure
Pressure in tank will not change substantially with normobaric difference p, by after above-mentioned hypothesis convenient for research operating oil line with
The direct relation in gap and oil leak amount, simplifies research process between floating-bush.
As a preferred solution of the present invention, by between operating oil line and floating-bush gap h distinguish value 0.1mm, 0.15mm,
0.2mm, 0.3mm, 0.4mm, 0.5mm are substituted into formula (2), on the basis of the resulting oil leak amount of benchmark event h=0.1mm calculating
Oil leak amount calculates resulting oil leak amount with other gaps and measures multiple N divided by basic oil leak, finally obtains oil leak amount and gap
Relationship is as follows:
Can learn from upper table: its oil leak amount is fast after gap h is more than design gaps between operating oil line and floating-bush
Speed increases, and the bigger oil leak amount in gap is more；When gap, h takes 0.4mm, although gap h is 4 times of benchmark event 0.1mm,
But its oil leak amount is 64 times of benchmark oil leak amount, and therefore, the variation of gap h is to its oil leak amount between operating oil line and floating-bush
Influence is very big, conversely, its gap is also centainly changed after operating oil line changes with floating-bush oil leak amount.
As a preferred solution of the present invention, in the step c, if the oil stain on lower floating-bush underlying item is in dotted drop
Terminal, and adjacent drop terminal spacing is wider, then shows that operating oil line and lower floating-bush gap are normal；If oil stain is in wire shaped,
Show that operating oil line and lower floating-bush gap may be abnormal or abnormal, and it is linear it is thicker, adjacent linear spacing is closeer, operating oil line
It is bigger with lower floating-bush gap.
As a preferred solution of the present invention, when operating oil line and lower floating-bush gap it is normal when, oil stream flow velocity be 0.06~
Between 0.14ml/s；When operating oil line and lower floating-bush gap may be abnormal, oil stream flow velocity is between 0.17~0.4ml/s；
When operating oil line and lower floating-bush gap exception, oil stream flow velocity is greater than 0.7ml/s.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
The present invention on lower oil collecting pot by unit maintenance phase or shutdown, being arranged peep hole and in unit current collection
The observation platform for observation is set up in ring casing, after compressor emergency shutdown, operator station on observation platform by peep hole into
Row observes the oil stain situation on lower floating-bush underlying item to assess lower floating-bush oil leak amount size；This method is based on Fluid Sealing
The observation method of technology not install sensor and its related software hardware device additionally, reduce the secondary injury to unit,
And inspection and evaluation is carried out in compressor emergency shutdown, injury of the rotary part to staff is avoided, while compensating for axis stream
The technological gap that lower floating-bush inside rotary propeller type turbine-generator units oil head is unable to monitor in non-turn(a)round.
Detailed description of the invention
Fig. 1 is the peep hole top view in the present invention on lower oil collecting pot.
Fig. 2 is that observation platform sets up place and lower floating-bush oil leak point of observation in the present invention.
Fig. 3 is lower floating-bush oil leak oil line morphology and gap health corresponding relationship in the present invention.
Fig. 4 is the method flow diagram in the present invention.
Marked in the figure: floating-bush under 1-, oil collecting pot under 2-, 3- peep hole, the big axis of 4-, 5- operating oil line, 6- observation platform
Position is set up, 7- oil stain observes position.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
Embodiment
The present embodiment provides floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units；
As Figure 1-Figure 4, floating-bush method for diagnosing faults under the axial-flow rotary propeller type turbine-generator units in the present embodiment,
The following steps are included:
A, during unit maintenance or when shutting down, setting is for 1 oil leak feelings of floating-bush under observing on lower oil collecting pot 2
The peep hole 3 of condition；
B, the observation platform for observation is set up in unit collector ring room；
C, after compressor emergency shutdown, floating-bush underlying item under operator station is observed on observation platform by peep hole
On oil stain situation assess lower floating-bush oil leak amount size.
The present invention on lower oil collecting pot by unit maintenance phase or shutdown, being arranged peep hole and in unit current collection
The observation platform for observation is set up in ring casing, after compressor emergency shutdown, operator station on observation platform by peep hole into
Row observes the oil stain situation on lower floating-bush underlying item to assess lower floating-bush oil leak amount size；This method is based on Fluid Sealing
The observation method of technology not install sensor and its related software hardware device additionally, reduce the secondary injury to unit,
And inspection and evaluation is carried out in compressor emergency shutdown, injury of the rotary part to staff is avoided, while compensating for axis stream
The technological gap that lower floating-bush inside rotary propeller type turbine-generator units oil head is unable to monitor in non-turn(a)round.
In the present embodiment, in the step a, the peep hole is the next part below movable propeller turbine oil head
It is drilled with the circular hole that diameter is 150mm on oil tray and installs that transparency is good and the glass of antivibration is formed, as shown in Figure 1, being both convenient for
It drills on existing lower oil collecting pot and glass is installed, and meet and carry out observing lower floating-bush oil leak situation through peep hole.Adding
Safety measure is carried out when the work peep hole, it is ensured that work circumstances safe.Lower floating-bush inside oil head is fixation member and turns
Pressure oil in static pipeline, is introduced into the operating oil line road rotated in big axis 4 by the critical component that pressure oil is transmitted between dynamic component
And guarantee that pressure oil will not be leaked largely, to efficiently adjust blade.
In the present embodiment, in the step b, the observation platform rides upon oil-collecting under current collection ring casing mandoor and oil head
Between basin, observation platform should be built on upper spider and keep safe distance and the measure that properly protects with rotary part, and observation is flat
Platform sets up position 6 as shown in Figure 2, which was both convenient for operator station to see on observation platform by peep hole
Lower floating-bush is examined, and advantageously ensures that personnel safety.
In the present embodiment, in the step c, under assessment when floating-bush oil leak amount size, by the operating oil line 5 of unit with
Gap is reduced to gap between two concentric cylinders between lower floating-bush 1, and oil leak amount can be according to cylindrical gap oil leak formula
It calculates:
Wherein, Q is oil leak amount, and L is lower floating-bush height, and β is dielectric property parameter, and D is operating oil line diameter, and p is pressure
Pressure and normobaric difference in power tank, the gap between operating oil line and floating-bush h.
Due to the height L of floating-bush lower in actual moving process, dielectric property parameter beta, operating oil line diameter D, pressure
Pressure in tank will not change substantially with normobaric difference p, and gap h often exists between operating oil line and floating-bush
Between 0.1~0.15mm of design gaps, gap h is macroscopically very small.The operating oil line of unit is inevitable in the process of running
It can swing, since unit loads onto technique difference in installation, manufacture group, each unit throw degree is different, grinds to lower floating-bush
Damage degree is also different, between operating oil line and floating-bush gap influence it is also different, therefore, between operating oil line and floating-bush between
A possibility that gap value changes in actual operation is maximum.
In the present embodiment, it is assumed that in formula (1)For definite valueThen formula (1) can be rewritten as:
Wherein, between operating oil line and floating-bush gap h design value between 0.1~0.15mm.
By, convenient for the direct relation in gap and oil leak amount between research operating oil line and floating-bush, simplifying after above-mentioned hypothesis
Research process.
In the present embodiment, by between operating oil line and floating-bush gap h distinguish value 0.1mm, 0.15mm, 0.2mm,
0.3mm, 0.4mm, 0.5mm are substituted into formula (2), calculate resulting oil leak amount as benchmark oil leak using benchmark event h=0.1mm
Amount calculates resulting oil leak amount with other gaps and measures multiple N divided by basic oil leak, finally obtains oil leak amount and gap relationships
It is as follows:
Can learn from upper table: its oil leak amount is fast after gap h is more than design gaps between operating oil line and floating-bush
Speed increases, and the bigger oil leak amount in gap is more；When gap, h takes 0.4mm, although gap h is 4 times of benchmark event 0.1mm,
But its oil leak amount is 64 times of benchmark oil leak amount, and therefore, the variation of gap h is to its oil leak amount between operating oil line and floating-bush
Influence is very big, conversely, its gap is also centainly changed after operating oil line changes with floating-bush oil leak amount.
Since there are two important function for lower floating-bush, one is that the pressure oil of stationary parts is transmitted to rotary part, one
A is sealing function, prevents from pressure oil being transmitted to a large amount of leakages of generation in rotary part.It is not exhausted for sealing in lower floating-bush
Pair sealing, it is lower that design gaps must be kept between floating-bush and operating oil line due to the requirement of mounting process, so appropriate
Oil leak is inevitable.But becomes larger when operating oil line will lead to its gap with the generation friction of lower floating-bush in operation, leak
Oil mass increases.Therefore, the variation of oil leak amount situation can reflect operating oil line and lower floating-bush abrasion condition indirectly.In compressor emergency shutdown
In the case of, standing under being observed on security platform by peep hole, oil leak situation, oil stain observe position 7 such as institute in Fig. 2 in oil accumulation basin
Show.
In the present embodiment, in the step c, as shown in figure 3, if the oil stain on lower floating-bush underlying item is in dotted drop
Terminal, and adjacent drop terminal spacing is wider, then shows that pressure oil is drop by drop dripped from operating oil line and lower floating-bush gap
Get off, i.e. operating oil line and lower floating-bush gap is normal, and oil stream flow velocity is between 0.06~0.14ml/s.If oil stain is in linear
Shape then shows that pressure oil is flowed out from operating oil line and lower floating-bush gap in wire shaped, i.e. operating oil line and lower floating-bush
Gap may be abnormal or abnormal, and it is linear it is thicker, adjacent linear spacing is closeer, illustrate that operating oil line is got over lower floating-bush gap
Greatly, abrasion condition is more serious, wherein oil stream flow velocity is 0.17~0.4ml/ when operating oil line and lower floating-bush gap may be abnormal
Between s；Oil stream flow velocity is greater than 0.7ml/s when operating oil line and lower floating-bush gap exception.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in original of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within reason.
Claims (8)
1. floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units, which comprises the following steps:
A, unit maintenance phase or when shutting down, peep hole of the setting for floating-bush oil leak situation under observing on lower oil collecting pot；
B, the observation platform for observation is set up in unit collector ring room；
C, after compressor emergency shutdown, under operator station is observed on observation platform by peep hole on floating-bush underlying item
Oil stain situation assesses lower floating-bush oil leak amount size.
2. floating-bush method for diagnosing faults under axial-flow rotary propeller type turbine-generator units according to claim 1, feature exist
In in the step a, the peep hole is to be drilled with circular hole on lower oil collecting pot and install transparent and antivibration glass to be formed.
3. floating-bush method for diagnosing faults under axial-flow rotary propeller type turbine-generator units according to claim 1, feature exist
In in the step b, the observation platform is ridden upon under current collection ring casing mandoor and oil head between oil collecting pot.
4. floating-bush method for diagnosing faults under axial-flow rotary propeller type turbine-generator units according to claim 1, feature exist
In in the step c, under assessment when floating-bush oil leak amount size, by gap between the operating oil line of unit and lower floating-bush
It is reduced to gap between two concentric cylinders, oil leak amount can be calculated according to cylindrical gap oil leak formula:
Wherein, Q is oil leak amount, and L is lower floating-bush height, and β is dielectric property parameter, and D is operating oil line diameter, and p is pressurized tank
In pressure and normobaric difference, the gap between operating oil line and floating-bush h.
5. floating-bush method for diagnosing faults under axial-flow rotary propeller type turbine-generator units according to claim 4, feature exist
In, it is assumed that in formula (1)For definite valueThen formula (1) can be rewritten as:
Wherein, between operating oil line and floating-bush gap h design value between 0.1~0.15mm.
6. floating-bush method for diagnosing faults under axial-flow rotary propeller type turbine-generator units according to claim 5, feature exist
In by gap h difference value 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm generation between operating oil line and floating-bush
Enter in formula (2), resulting oil leak amount is calculated as benchmark oil leak amount using benchmark event h=0.1mm, calculates gained with other gaps
Oil leak amount measure multiple N divided by basic oil leak, it is as follows with gap relationships to finally obtain oil leak amount:
。
7. floating-bush method for diagnosing faults under axial-flow rotary propeller type turbine-generator units according to claim 1, feature exist
In, in the step c, if the oil stain on lower floating-bush underlying item is in dotted drop terminal, and adjacent drop terminal spacing is wider,
Then show that operating oil line and lower floating-bush gap are normal；If oil stain is in wire shaped, show operating oil line and lower floating-bush gap
May be abnormal or abnormal, and it is linear it is thicker, adjacent linear spacing is closeer, operating oil line and lower floating-bush gap are bigger.
8. floating-bush method for diagnosing faults under axial-flow rotary propeller type turbine-generator units according to claim 7, feature exist
In when operating oil line and lower floating-bush gap are normal, oil stream flow velocity is between 0.06~0.14ml/s；When operating oil line is under
When floating-bush gap may be abnormal, oil stream flow velocity is between 0.17~0.4ml/s；When operating oil line and lower floating-bush gap are abnormal
When, oil stream flow velocity is greater than 0.7ml/s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081503.9A CN109779813A (en) | 2019-01-28 | 2019-01-28 | Floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910081503.9A CN109779813A (en) | 2019-01-28 | 2019-01-28 | Floating-bush method for diagnosing faults under a kind of axial-flow rotary propeller type turbine-generator units |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576064A (en) * | 2022-03-11 | 2022-06-03 | 雅砻江流域水电开发有限公司 | Method for diagnosing blade adjustment response abnormity of axial flow propeller type unit |
| CN116519281A (en) * | 2023-04-28 | 2023-08-01 | 华能澜沧江水电股份有限公司 | Oil receiver floating tile abrasion diagnosis system and method based on industrial Internet |
-
2019
- 2019-01-28 CN CN201910081503.9A patent/CN109779813A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576064A (en) * | 2022-03-11 | 2022-06-03 | 雅砻江流域水电开发有限公司 | Method for diagnosing blade adjustment response abnormity of axial flow propeller type unit |
| CN114576064B (en) * | 2022-03-11 | 2023-12-22 | 雅砻江流域水电开发有限公司 | Method for diagnosing abnormal adjustment response of blades of axial-flow rotating-blade type unit |
| CN116519281A (en) * | 2023-04-28 | 2023-08-01 | 华能澜沧江水电股份有限公司 | Oil receiver floating tile abrasion diagnosis system and method based on industrial Internet |
| CN116519281B (en) * | 2023-04-28 | 2024-06-11 | 华能澜沧江水电股份有限公司 | Oil receiver floating tile abrasion diagnosis system and method based on industrial Internet |
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Application publication date: 20190521 |