CN202255765U - Three-fulcrum weighing-type static balancing device for turbine runner - Google Patents
Three-fulcrum weighing-type static balancing device for turbine runner Download PDFInfo
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- CN202255765U CN202255765U CN2011203333802U CN201120333380U CN202255765U CN 202255765 U CN202255765 U CN 202255765U CN 2011203333802 U CN2011203333802 U CN 2011203333802U CN 201120333380 U CN201120333380 U CN 201120333380U CN 202255765 U CN202255765 U CN 202255765U
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Abstract
The utility model provides a three-fulcrum weighing-type static balancing device for a turbine runner, which comprises three pressure sensors, wherein the three pressure sensors are evenly arranged on the bottom of a rotating wheel, and positioned on the same evenly distributed pitch circle; the included angle between every two adjacent pressure sensors is 120 degrees; the center of the evenly distributed pitch circle of the three pressure sensors is positioned on the central line of the rotating wheel; the three pressure sensors are supported on a balance seat; the balance seat is supported on a ground platform by an adjusting sizing block; and the ground platform is provided with a synchronous lifting mechanism. The utility model has the advantages of simple structure and high universality, and is convenient for mounting.
Description
Technical field
The utility model relates to a kind of rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus, belongs to electromechanical integration detection technique field.
Background technology
For large high-speed rotary body parts such as rotary wheel of water turbine; In its processing and manufacturing process, must carry out static equilibrium technology according to correlation standard; To eliminate or to reduce within amount of unbalance to the correlation standard that occurs in the manufacture process; Thereby the assurance product quality guarantees that the hydraulic turbine moves safely and steadly.
Like application number is that 200810045371.6 one Chinese patent application " hydroelectric generating set runner steel ball glass plate type static balancing apparatus and balance method " is said; " steel ball-runner plate formula " static balancing apparatus and method that traditional static balance of rotary wheel of water turbine technology mainly adopts; The maximum weak point of this device and method is that precision is not high, poor repeatability.And for large-scale unit runner, because steel ball and runner plate belong to a way of contact, overweight runner deadweight causes carrying steel ball and runner plate produces deformation; Directly influence the mensuration and the trim of amount of unbalance, therefore this conventional apparatus and method have significant limitation, and shortcoming is following: (1) this static balancing apparatus is pure mechanical structures; Complicated in mechanical structure; The fabrication and processing cycle is slow, and poor for various runner versatilities, cost is higher; (2) installation and inconvenient operation, computing method are complicated; (3) only be applicable to the runner of less tonnage, limitation is bigger; (4) equilibration period is longer.
The utility model content
The technical matters that the utility model will solve is to provide a kind of simple in structure, easy for installation, rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus that precision is high.
In order to solve the problems of the technologies described above; The rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus that the utility model provides; Comprise three pressure transducers that evenly are located at the runner bottom, said three pressure transducers are positioned at same being uniformly distributed with on the pitch circle, and said angle between adjacent two pressure transducers arbitrarily is 120 degree; The pitch circle center of circle that is uniformly distributed with of said three pressure transducers is positioned on the center line of runner; Said three pressure transducers are supported on the balance seat, and said balance seat is supported on the ground surface platform through the adjustment parallels, also is provided with the synchronization of jacking up mechanism that runner is risen on the said ground surface platform.
Preferably, said synchronization of jacking up mechanism comprises displacement transducer and hydraulic jack, is equipped with said displacement transducer and hydraulic jack on four supporting seats that equidistantly distribute around the balance seat, and said four supporting seats all are located on the ground surface platform.
Preferably, be equipped with contour pad iron between said each pressure transducer and the balance seat.
Preferably, said runner is a francis turbine runner, and said runner crown central hole is fixed with discoid balance plate, and said balance plate is through arm-tie and bolt, and said three pressure transducers are located at said balance plate bottom.
Further, also be provided with a plurality of runner bed hedgehopping pieces between said balance plate and the balance seat.
Preferably, said runner is the movable propeller turbine runner, and said three pressure transducers all are located on the runner base plane.
The rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus physical constructions of the utility model are simple, versatility is high, easy for installation.
Description of drawings
Fig. 1 is the structural representation that the francis turbine runner three fulcrum Weighing type static balancing apparatus of the utility model cooperate with runner.
Fig. 2 is the partial enlarged drawing at D place among Fig. 1.
Fig. 3 is the partial enlarged drawing at E place among Fig. 1.
Fig. 4 is the perspective view of the francis turbine runner three fulcrum Weighing type static balancing apparatus of the utility model.
Fig. 5 is the partial enlarged drawing at F place among Fig. 4.
Fig. 6 is the position distribution synoptic diagram of pressure transducer A, pressure transducer B, pressure transducer C.
Fig. 7 is the perspective view of the movable propeller turbine runner three fulcrum static balancing apparatus of the utility model.
Embodiment
Further specify below in conjunction with the scheme of accompanying drawing the utility model.
As depicted in figs. 1 and 2; Francis turbine runner three fulcrum Weighing type static balancing apparatus; Comprise the discoid balance plate 2 that is fixed on runner crown 11 central hole through arm-tie 13 and bolt 14, evenly be provided with three pressure transducer A, B, C along balance plate 2 bottom circumferencial directions, three pressure transducer A, B, C all are positioned on the balance plate 2 through register pin 15; Three pressure transducer A, B, C are positioned at same being uniformly distributed with on the pitch circle; Angle between adjacent two pressure transducers 3 is 120 degree arbitrarily, and three pressure transducer A, B, C are uniformly distributed with the pitch circle center of circle and are positioned on the center line of runner 1, and three pressure transducer A, B, C are supported on the balance seat 4; Balance seat 4 is supported on the ground surface platform 6 through adjustment parallels 5, also is provided with the synchronization of jacking up mechanism that runner is risen on the ground surface platform 6.
As shown in Figure 1; Synchronization of jacking up mechanism comprises displacement transducer and hydraulic jack 8; Be equipped with displacement transducer on four supporting seats 9 that equidistantly distribute around the balance seat 4 and 8, four supporting seats 9 of hydraulic jack all are located on the ground surface platform 6, synchronization of jacking up mechanism also comprises solenoid valve, controller, computer, Control Software and rat tail; Hydraulic jack 8 is used to control the rise and fall of runner, is convenient to measure; Displacement transducer is used to feed back the synchronous rise and fall distance of four hydraulic jack, is convenient to computer control; Control the hydraulic pressure oil mass that gets into or flow out hydraulic jack through the switching of solenoid valve, thus operating hydraulically operated lifting jack; Controller is transferred to computer with the signal of displacement transducer, opens and closes through contrast calculation control solenoid valve; Rising, the decline of four hydraulic jack of Control Software may command; Rat tail is used for the electrical connection of controller, computer etc.
Be equipped with contour pad iron 10 (see figure 2)s between each pressure transducer A, B, C and the balance seat 4, also be provided with a plurality of runner bed hedgehopping pieces 12 (seeing Fig. 3 and shown in Figure 5) between balance plate 2 and the balance seat 4, when not detecting, can be used for runner 1 load-bearing.
Fig. 1 extremely rotary wheel of water turbine shown in Figure 5 is francis turbine runner; The device of the utility model also can be used for movable propeller turbine runner shown in Figure 7; Because of such runner bottom has enough big plane voltage supply force transducer to place; Therefore do not need balance plate, pressure transducer A, B, C directly are located on the runner base plane.
The technology of utilizing the utility model rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus to carry out the static equilibrium detection may further comprise the steps:
(1) the rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus of installation the utility model, it comprises:
1) lays balance seat 4 on ground surface platform 6; And, synchronization of jacking up mechanism is installed on ground surface platform 6 through adjustment parallels 5 level-ofves, make runner 1 weight can be evenly distributed in the synchronization of jacking up mechanism; Synchronization of jacking up mechanism comprises hydraulic jack 8 and displacement transducer; Around 9, four supporting seats 9 of four supporting seats of installation on the ground surface platform 6 equidistantly are distributed in balance seat 4, be equipped with above-mentioned hydraulic jack 8 and displacement transducer on each supporting seat 9;
2) balance plate 2 is installed in runner crown 11 central hole, and fixed;
3) boatswain chair 3 places lift runner 1 on balance seat 4 in Fig. 1, and with synchronization of jacking up mechanism runner are risen, and make the complete load-bearing of runner in synchronization of jacking up mechanism;
4) setting pressure sensors A, pressure transducer B, pressure transducer C on balance plate 2 bottom circumference, be positioned at same being uniformly distributed with on the pitch circle; And being uniformly distributed with the pitch circle center of circle is arranged in the center line of runner 1 (Fig. 1 O place refers to that lines are the center line of runner; Be how much rotation centerlines of runner) on; Pressure transducer A is contained on the Y direction, between pressure transducer A, pressure transducer B, the pressure transducer C in twos angle be 120 °; Each pressure transducer is connected with the data presentation instrument and puts in place;
5) between pressure transducer A and balance seat, pressure transducer B and balance seat, pressure transducer C and balance seat, contour pad iron 10 is set respectively, and a plurality of runner bed hedgehopping pieces 12 are set between balance plate and balance seat.After end is installed, guarantee that all electromechanical instruments are in place, all functions are all debugged normally.
(2) carry out the runner coarse balance:
1) Control Software is assigned instruction, and control synchronization of jacking up mechanism makes whole runner decline load-bearing on pressure transducer A, pressure transducer B, pressure transducer C;
2) inspection and adjustment runner level, runner rises then, makes pressure transducer A, pressure transducer B, the pressure transducer C position of making zero;
3) runner descends load-bearing once more on pressure transducer A, pressure transducer B, pressure transducer C, and record pressure transducer A, pressure transducer B, pressure transducer C reading are respectively F
A, F
B, F
C, as first group of data;
4) repeating step 2 successively respectively), 3) secondary, write down two groups of data again, write down three groups of data altogether;
5) with three pressure transducer A, B, C position around the balance plate center Rotate 180 °, repeating step 2), 3) and 4), write down three groups of data again;
(3) size and the position of runner counterweight and the angle a of X axle of calculating runner counterweight forces F;
Computing method are following: as shown in Figure 6; Suppose to lay particular stress on some E place in the position; Then counterweight is located at and symmetric points D place, center, runner center O place; After then having added counterweight, then the counterweight forces F at D place and pressure transducer A, B, the C place power of bearing is with respect to the equalising torque of X axle, Y axle, so obtain following formula by equalising torque:
Respectively point out equalising torque by A, B, C, D, can get with respect to the X axle
F×Lsina＝F
A×R-(F
B×Rsin30°+F
C×Rsin30°) (1)
By A, B, C, D each point equalising torque, can get with respect to the Y axle
F×Lcosa＝F
B×Rcos30°-F
C×Rcos30°(2)
By (1)
2+ (2)
2Can get
Can get by (1) ÷ (2)
More than various in:
F
AThe reading of-pressure transducer A;
F
BThe reading of-pressure transducer B;
F
CThe reading of-pressure transducer C;
The determined radius that is uniformly distributed with pitch circle of three pressure transducers of R-;
The position of L-runner counterweight is apart from the distance of runner center line;
F-runner counterweight forces;
The position of a-runner counterweight and the angle of X axle.
General, L and R have following relation:
L＝αR (5)
In formula (5) substitution formula (3), can get
When α=1, the runner counterweight just in time is added on the circumference that is uniformly distributed with pitch circle, can set the value of alpha certainly according to the correct position of the runner of preparing to add counterweight.
(4) utilize the result of calculation that draws in the step (three), carry out the off-centre of runner and join the car counterweight or add balancing weight counterweight 7 (as shown in Figure 1);
(5) carry out the runner fine balance with check counterweight effect and confirm remaining amount of unbalance whether in claimed range, runner coarse balance in the same step of method (two).
In above technology; Pressure transducer specification commonly used comprises 2.5 tons, 22 tons, 68 tons, 100 tons, 150 tons, 220 tons etc.; Can supply the Different Weight runner to select for use; The pressure transducer precision all reaches 2/10000ths metering levels, and for reaching the optimum detection precision, the rule that the sensor specification is selected is that the specified load-bearing of single-sensor is 1/2 of a runner weight.
And in the synchronization of jacking up mechanism of the utility model, four hydraulic jack are through Control Software control, and synchronization accuracy can reach 0.03mm, can guarantee well that the level of runner promotes and decline.
The rotary wheel of water turbine three fulcrum Weighing type static equilibrium technologies of the utility model also are applicable to the movable propeller turbine runner, and the same francis turbine runner of method repeats no more here.
The rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus of the utility model are a kind of traditional brand-new static balancing apparatus different from the past fully, and its principle and operation detection method are also different with classic method.It has abandoned complex mechanical construction; Through a series of sophisticated sensor and the accurate control gear that promotes synchronously, make the detection of amount of unbalance and calculating become accurate more and easy, its advantage is following: 1) physical construction is simple; Most of parts can be general, and fabrication cycle is short; 2) install and operation is simple and reliable, computing method are simple, and data are accurate; 3) applicable to several tons to all kinds of runners between the hundreds of ton, versatility is high.
It is that tested runner is lain in a horizontal plane in the supporting plane that three pressure transducers form that this device detects principle, and be distributed in these three the pressure transducer centres on the same circumference.According to the plane force system synthetic method in the theoretical mechanics, the voltage signal that utilizes three high-precision pressure sensors to spread out of becomes measured workpiece runner weight through analog to digital conversion, need increase the weight of or go heavy weight and position through calculating again.In addition, this method can also be measured the runner actual weight.
The three fulcrum Weighing type static balancing apparatus of the utility model are widely used in a plurality of projects; Comprise various francis turbine runners: runner is crossed in Three Gorges runner, imperial beach runner, voe runner, La Xiwa runner, small stream Lip river, glutinous bundle crosses runner, peace section runner etc., and the axial-flow rotary propeller type runner: careless street runner, flat class runner, Fuchunjiang River runner etc.Quick, convenient, reliable, the characteristic of accurate of this cover method in a large amount of practical applications, have been verified.
More than just the utility model has been carried out exemplary explanation, the concrete implementation of the utility model is not limited thereto.The insubstantial modifications that design of any employing the utility model and technical scheme are carried out is all within the protection domain of the utility model.
Claims (6)
1. rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus; It is characterized in that: comprise three pressure transducers (A, B, C) that evenly are located at runner (1) bottom; Said three pressure transducers (A, B, C) are positioned at same being uniformly distributed with on the pitch circle; Said angle between adjacent two pressure transducers (A, B, C) arbitrarily is 120 degree, and the pitch circle center of circle that is uniformly distributed with of said three pressure transducers (A, B, C) is positioned on the center line of runner (1), and said three pressure transducers (3) are supported on the balance seat (4); Said balance seat (4) is supported on the ground surface platform (6) through adjustment parallels (5), also is provided with the synchronization of jacking up mechanism that runner is risen on the said ground surface platform (6).
2. rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus according to claim 1; It is characterized in that: said synchronization of jacking up mechanism comprises displacement transducer and hydraulic jack (8); Equidistantly be equipped with said displacement transducer and hydraulic jack (8) on four supporting seats (9) of distribution all around along balance seat (4), said four supporting seats (9) all are located on the ground surface platform (6).
3. rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus according to claim 1 is characterized in that: be equipped with contour pad iron (10) between said each pressure transducer (A, B, C) and the balance seat (4).
4. rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus according to claim 1; It is characterized in that: said runner is a francis turbine runner; Said runner crown (11) central hole is fixed with discoid balance plate (2); Said balance plate (2) is fixing through arm-tie (13) and bolt (14), and said three pressure transducers (A, B, C) are located at said balance plate (2) bottom.
5. rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus according to claim 4 is characterized in that: also be provided with a plurality of runner bed hedgehopping pieces (12) between said balance plate (2) and the balance seat (4).
6. rotary wheel of water turbine three fulcrum Weighing type static balancing apparatus according to claim 1, it is characterized in that: said runner is the movable propeller turbine runner, said three pressure transducers (A, B, C) all are located on the runner base plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203333802U CN202255765U (en) | 2011-09-06 | 2011-09-06 | Three-fulcrum weighing-type static balancing device for turbine runner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203333802U CN202255765U (en) | 2011-09-06 | 2011-09-06 | Three-fulcrum weighing-type static balancing device for turbine runner |
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| Publication Number | Publication Date |
|---|---|
| CN202255765U true CN202255765U (en) | 2012-05-30 |
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| CN2011203333802U Expired - Fee Related CN202255765U (en) | 2011-09-06 | 2011-09-06 | Three-fulcrum weighing-type static balancing device for turbine runner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359848A (en) * | 2011-09-06 | 2012-02-22 | 上海福伊特水电设备有限公司 | Water turbine rotating wheel three-fulcrum weighing static balance device and static balance technology thereof |
| CN103148984A (en) * | 2013-02-25 | 2013-06-12 | 北京科技大学 | Three-wire torsional pendulum method rigid body dynamic parameter test console |
-
2011
- 2011-09-06 CN CN2011203333802U patent/CN202255765U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359848A (en) * | 2011-09-06 | 2012-02-22 | 上海福伊特水电设备有限公司 | Water turbine rotating wheel three-fulcrum weighing static balance device and static balance technology thereof |
| CN103148984A (en) * | 2013-02-25 | 2013-06-12 | 北京科技大学 | Three-wire torsional pendulum method rigid body dynamic parameter test console |
| CN103148984B (en) * | 2013-02-25 | 2015-04-01 | 北京科技大学 | Three-wire torsional pendulum method rigid body dynamic parameter test console |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130906 |