CN103008973B - Method for adjusting spindle axis of hydraulic turbine generator set - Google Patents

Abstract

In order to solve problem that the grinding direction, the grinding area and the grinding quantity of each area are hard to determine in the method for adjusting a spindle axis of a hydraulic turbine generator set in the prior art, the invention provides a method for adjusting the spindle axis of the hydraulic turbine generator set. Whether a generator shaft of the set is bent and deformed or not by using absolute value of relative swing; a diameter direction represented by two turning points with maximum pure swing absolute values is used as the grinding direction; when the pure swing with maximum absolute value is a positive value, the grinding quantity is changed from small to large; and when the pure swing with maximum absolute value is a negative value, the grinding quantity is changed from large to small. The method has the advantages as follows: the grinding direction and the grinding quantity are determined through turning data and grinding a flange surface by using a regional step-by-step grinding method, the grinding quality is guaranteed and the axis is simply, conveniently and effectively adjusted.

Description

A kind of hydrogenerator set main shaft axis adjusting process

Technical field

The present invention relates to technical field of hydraulic generators, be specifically related to a kind of hydrogenerator set main shaft axis adjusting process.

Background technology

As everyone knows, hydrogenerator main shaft comprises generator shaft and turbine shaft, and both are connected with bolt by end flange.When installing hydrogenerator unit, being important step wherein to the inspection of unit axis and adjustment, if unit axis generation deviation, then can affecting the normal operation that hydrogenerator is later.

After generator shaft is connected with turbine shaft theoretically, the axis of the set main shaft formed should be the unit of straight line, overhung construction, and the axis of set main shaft should be also the straight line of a vertical.But due to the impact by manufacturing and fixing error, if generator shaft or turbine shaft end flange face are inclined-plane, then set main shaft axis may be caused to occur deviation at flange.Therefore, after hydrogenerator units' installation, need to adopt jiggering method to check set main shaft axis.So-called jiggering method refers to the even number test point along the circumferential direction dividing equally more than 6 or 6 at set main shaft cylindrical, i.e. so-called jiggering point, and at least dial gauge is set respectively in two terminations of generator shaft and turbine shaft the distance of jiggering point to dial gauge fixing point is detected; Slow circumvolve set main shaft, obtains the detection data of generator shaft and turbine shaft two terminations circumferentially each jiggering point respectively, then, analyzes above-mentioned Monitoring Data, can judge whether the set main shaft axis be detected occurs deviation.Under normal circumstances, the axis of generator shaft and turbine shaft itself is straight line, and the situation of deviation mainly appears at the flange connections of generator shaft and turbine shaft, and conventional way adopts the mode of cushioning or grinding flange face to solve.So-called cushioning arranges packing ring exactly between generator shaft and turbine shaft end flange, make up the gap of two flange faces, reach the problem solving unit axis deviation, but due to packing ring thinner, and generating unit speed is higher, packing ring is easily thrown out of under centrifugal action.The sloping portion of flange face namely grinds off by so-called grinding flange face, makes the flange face complanation of inclination, thus makes unit axis become straight line.But grinding flange face needs accurately to determine to grind the stock removal etc. in direction, abrasive areas and each region, and thus, the generator shaft after guarantee connects and the axis of turbine shaft are straight line.Obviously, prior art hydrogenerator set main shaft axis adjusting process also exists grinding direction, the stock removal in abrasive areas and each region is difficult to problems such as determining.

Summary of the invention

There is grinding direction for solving prior art hydrogenerator set main shaft axis adjusting process, the stock removal in abrasive areas and each region is difficult to problems such as determining, the invention provides a kind of hydrogenerator set main shaft axis adjusting process.

Hydrogenerator set main shaft axis adjusting process of the present invention, comprises the following steps:

S1: the plumbous perpendicularity of adjustment generator shaft

S11: set up horizontal reference below the shaft shoulder of generator shaft;

S12: arrange runner plate between horizontal reference and the shaft shoulder of generator shaft, to push away watt and support bolt, wherein, support bolt is fixed on horizontal reference, push away watt being arranged between runner plate and support bolt, runner plate contacts with the shaft shoulder;

S13: adjustable fixing bolt, makes runner plate level reach 0.02mm/m.

S2: jiggering detects

S21: along the circumferential direction divide equally n point at set main shaft cylindrical, i.e. jiggering point; Wherein, n be greater than 4 even number;

S22: dial gauge A1, A2 and A3 are set respectively on the same vertical straight line in the outside of set main shaft top guide bearing, lower guide bearing and water pilot bearing, and using the jiggering point on top guide bearing as benchmark jiggering point;

S23: slowly rotate set main shaft, reads dial gauge A1, A2 and A3 at the reading of each jiggering point and record,

S3: data analysis and judgement

S31: calculate the full throw of each jiggering point, clean throw and relative throw,

Described full throw is the difference of the dial gauge reading of certain jiggering point jiggering point relative to diametric(al), clean throw is the full throw of certain jiggering point and the difference of the full throw of corresponding benchmark jiggering point, and relative throw is for clean throw is divided by the value of the axial line distance between two jiggering points corresponding to this clean throw;

S32: judge the absolute value of the relative throw of lower guide bearing place each jiggering point whether≤0.02mm/m, be considered as unit generation arbor and do not produce flexural deformation, proceed adjustment; Otherwise be considered as unit generation arbor and create flexural deformation, after need processing it, proceed adjustment again;

S33: judge the absolute value of the relative throw of water pilot bearing place each jiggering point whether≤0.02mm/m, be considered as main-shaft axis and deviation do not occur at flange, terminate adjustment; Otherwise be considered as set main shaft axis at flange generation deviation, proceed adjustment;

S34: the adpting flange taking generator shaft and turbine shaft apart, detects the faying face ratio whether >=75% of generator shaft flange and turbine shaft flange;

S35: be, proceeds adjustment, otherwise reconnects the flange of generator shaft and turbine shaft, repeated execution of steps S1, S2 and S3, until faying face ratio >=75% of motor shaft flange and turbine shaft flange;

S4: determine polishing direction and polishing amount

S41: the diametric(al) shown in two jiggering points of water pilot bearing place clean throw maximum absolute value value is polishing direction; The clean throw of maximum absolute value be on the occasion of, polishing amount is from small to large; Clean throw is negative value, and polishing amount from big to small;

S42: calculate polishing amount according to the following formula:

$h=\frac{r\×m}{l}$

In formula: h is polishing amount, r is turbine shaft flange radius, and m is water pilot bearing place clean throw maximum absolute value value, and l is that water pilot bearing place is to turbine shaft flange shaft linear distance;

S5: polishing flange face

S51: install elevating mechanism, unclamp the connecting bolt of generator shaft flange and turbine shaft flange, regulates elevating mechanism to make turbine shaft vertical subsidence at least 350mm;

S52: the diameter in the polishing direction determined with step S41 is benchmark, adopts the straight line perpendicular to datum diameter that the flange face of turbine shaft is divided into 10 regions; And polish from the region that maximum polishing is measured, its polishing amount is the determined polishing amount h of step S42, and to successively decrease successively polishing amount with h/10, until it is complete to polish;

S53: generator shaft and turbine shaft are linked together, repeats step S2, S3, S4 and S5, until set main shaft axis deviation does not occur at flange.

Further, the step S34 of hydrogenerator set main shaft axis adjusting process of the present invention detect generator shaft flange face and turbine shaft flange face in conjunction with ratio whether >=75%, comprising:

S341: the connecting bolt unclamping generator shaft and turbine shaft;

S342: spray red lead powder on the flange face of generator shaft and the flange face of turbine shaft, simultaneously clamping clearance gauge between two flange faces, adopt connecting bolt generator shaft and turbine shaft to be coupled together again;

S343: the connecting bolt again unclamping generator shaft and turbine shaft, takes off clearance gauge, judges ratio clearance gauge being pasted with red lead powder area and flange area.

Further, the step S52 of hydrogenerator set main shaft axis adjusting process of the present invention also comprises:

S521: adopt inside micrometer to measure the air line distance of each region to generator shaft flange face before polishing, and perform record;

S522: adopt inside micrometer to measure the air line distance of each region to generator shaft flange face after polishing, and with polish before the value that records compare, ensure that the polishing amount in each region meets the requirements;

S523: adopt polished silicon wafer to carry out polishing to transitional region adjacent between two after polishing.

The Advantageous Effects of hydrogenerator set main shaft axis adjusting process of the present invention determines polishing direction and polishing amount by jiggering data, and the mode adopting subregion to polish step by step is polished to flange face, ensure that polishing quality, make its axis adjustment easy, effective.

Accompanying drawing explanation

Fig. 1 is the structural representation of hydrogenerator set main shaft;

Fig. 2 is hydrogenerator set main shaft axis adjusting process jiggering point of the present invention and flange face subregion schematic diagram.

Below in conjunction with the drawings and specific embodiments, hydrogenerator set main shaft axis adjusting process of the present invention is described in further detail.

Detailed description of the invention

Fig. 1 is the structural representation of hydrogenerator set main shaft, Fig. 2 is hydrogenerator set main shaft axis adjusting process jiggering point of the present invention and flange face subregion schematic diagram, and in figure, 1 is generator shaft, 2 is turbine shaft, 101 is the generator shaft shoulder, and 102 is top guide bearing, and 103 is lower guide bearing, 104 is generator shaft flange, 201 turbine shaft flanges, 202 is water pilot bearing, and A1, A2 and A3 are dial gauge.As seen from the figure, hydrogenerator set main shaft axis adjusting process of the present invention comprises the following steps:

S1: the plumbous perpendicularity of adjustment generator shaft

S11: set up horizontal reference below the shaft shoulder of generator shaft;

S12: arrange runner plate between horizontal reference and the shaft shoulder of generator shaft, to push away watt and support bolt, wherein, support bolt is fixed on horizontal reference, push away watt being arranged between runner plate and support bolt, runner plate contacts with the shaft shoulder;

S13: adjustable fixing bolt, utilizes the level of runner plate that the shaft shoulder of generator shaft is adjusted to level;

S2: jiggering detects

S21: along the circumferential direction divide equally n point at set main shaft cylindrical, i.e. jiggering point; Wherein, n be greater than 4 even number; In this city example, the value of n is 8, namely along the circumferential direction divides equally 8 jiggering points at set main shaft cylindrical;

S22: dial gauge A1, A2 and A3 are set respectively on the same vertical straight line in the outside of set main shaft top guide bearing, lower guide bearing and water pilot bearing, and using the jiggering point on top guide bearing as benchmark jiggering point;

S23: slowly rotate set main shaft, reads dial gauge A1, A2 and A3 at the reading of each jiggering point and record; The detection record of the present embodiment is as shown in table 1 below;

Table 1: jiggering detection record unit is 0.01mm

S3: data analysis and judgement

S31: calculate the full throw of each jiggering point, clean throw and relative throw,

Described full throw is the difference of the dial gauge reading of certain jiggering point jiggering point relative to diametric(al), clean throw is the full throw of certain jiggering point and the difference of the full throw of corresponding benchmark jiggering point, and relative throw is for clean throw is divided by the value of the axial line distance between two jiggering points corresponding to this clean throw; The full throw of the present embodiment, clean throw are as shown in table 1 with the calculated value of relative throw;

S32: judge the absolute value of the relative throw of lower guide bearing place each jiggering point whether≤0.02mm/m, be considered as unit generation arbor and do not produce flexural deformation, proceed adjustment; Otherwise be considered as unit generation arbor and create flexural deformation, after need processing it, proceed adjustment again; The absolute value of the relative throw of the present embodiment lower guide bearing place each jiggering point all≤0.02mm/m, illustrate that generator shaft does not produce flexural deformation;

S33: judge the absolute value of the relative throw of water pilot bearing place each jiggering point whether≤0.02mm/m, be considered as main-shaft axis and deviation do not occur at flange, terminate adjustment; Otherwise be considered as set main shaft axis at flange generation deviation, proceed adjustment; The present embodiment water pilot bearing place jiggering point 2 is 0.047mm/m with the absolute value of the relative throw of 6, has exceeded 0.02mm/m, illustrates that set main shaft axis is at flange generation deviation, needs to carry out adjustment;

S34: the adpting flange taking generator shaft and turbine shaft apart, detects the faying face ratio whether >=75% of generator shaft flange and turbine shaft flange; Comprise:

S341: the connecting bolt unclamping generator shaft and turbine shaft;

S342: spray red lead powder on the flange face of generator shaft and the flange face of turbine shaft, simultaneously clamping clearance gauge between two flange faces, adopt connecting bolt generator shaft and turbine shaft to be coupled together again;

S343: the connecting bolt again unclamping generator shaft and turbine shaft, takes off clearance gauge, judges ratio clearance gauge being pasted with red lead powder area and flange area;

S35: be, proceeds adjustment, otherwise reconnects the flange of generator shaft and turbine shaft, repeated execution of steps S1, S2 and S3, until faying face ratio >=75% of motor shaft flange and turbine shaft flange;

S4: determine polishing direction and polishing amount

S41: the diametric(al) shown in two jiggering points of water pilot bearing place clean throw maximum absolute value value is polishing direction, two jiggering points of the present embodiment clean throw maximum absolute value value are 2 and 6, therefore, polishing direction should be the diametric(al) shown in jiggering point 2 and 6; Further, the clean throw of the present embodiment water pilot bearing place maximum absolute value is negative value, and polishing amount from big to small;

S42: calculate polishing amount according to the following formula:

$h=\frac{r\×m}{l}$

In formula: h is polishing amount, r is turbine shaft flange radius, and m is water pilot bearing place clean throw maximum absolute value value, and l is that water pilot bearing place is to turbine shaft flange shaft linear distance;

The present embodiment turbine shaft flange radius r is 420mm, and water pilot bearing place clean throw maximum absolute value value m is 0.35mm, and water pilot bearing place is 7.5m to turbine shaft flange shaft linear distance l, and substituting into above formula has:

$h=\frac{420\×0.35}{7500}=0.0196\mathrm{mm}$

Namely the maximum polishing amount of the present embodiment is 0.0196mm;

S5: polishing flange face

S51: install elevating mechanism, unclamp the connecting bolt of generator shaft flange and turbine shaft flange, regulates elevating mechanism to make turbine shaft vertical subsidence at least 350mm;

S52: the diameter in the polishing direction determined with step S41 is benchmark, adopts the straight line perpendicular to datum diameter that the flange face of turbine shaft is divided into 10 regions (as shown in Figure 2); And polish from the region that maximum polishing is measured, its polishing amount is the determined polishing amount h of step S42, and to successively decrease successively polishing amount with h/10, until it is complete to polish;

The polishing direction of the present embodiment is the diametric(al) shown in jiggering point 2 and 6, therefore, with this diameter for benchmark, flange face is divided into 10 regions, the calculating polishing amount according to step S42 is 0.0196mm, then polish from the region that maximum polishing is measured, and to successively decrease successively polishing amount with h/10, namely the first polishing region polishing amount is 0.0196mm, and the polishing amount in the second polishing region is 0.01764mm, and successively decrease 0.00196mm; The rest may be inferred, until it is complete to polish; For ensureing polishing quality, adopting inside micrometer to detect polishing amount, comprising:

S521: adopt inside micrometer to measure the air line distance of each region to generator shaft flange face before polishing, and perform record;

S522: adopt inside micrometer to measure the air line distance of each region to generator shaft flange face after polishing, and with polish before the value that records compare, ensure that the polishing amount in each region meets the requirements;

S523: adopt polished silicon wafer to carry out polishing to transitional region adjacent between two after polishing.

S53: generator shaft and turbine shaft are linked together, repeats step S2, S3, S4 and S5, until set main shaft axis deviation does not occur at flange.

The Advantageous Effects of hydrogenerator set main shaft axis adjusting process of the present invention determines polishing direction and polishing amount by jiggering data, and the mode adopting subregion to polish step by step is polished to flange face, ensure that polishing quality, make its axis adjustment easy, effective.

Claims (3)

1. a hydrogenerator set main shaft axis adjusting process, it is characterized in that, the method comprises the following steps:

S1: the plumbous perpendicularity of adjustment generator shaft

S11: set up horizontal reference below the shaft shoulder of generator shaft;

S12: arrange runner plate between horizontal reference and the shaft shoulder of generator shaft, to push away watt and support bolt, wherein, support bolt is fixed on horizontal reference, push away watt being arranged between runner plate and support bolt, runner plate contacts with the shaft shoulder;

S13: adjustable fixing bolt, makes runner plate level reach 0.02mm/m.

S2: jiggering detects

S21: along the circumferential direction divide equally n point at set main shaft cylindrical, i.e. jiggering point; Wherein, n be greater than 4 even number;

S22: dial gauge A1, A2 and A3 are set respectively on the same vertical straight line in the outside of set main shaft top guide bearing, lower guide bearing and water pilot bearing, and using the jiggering point on top guide bearing as benchmark jiggering point;

S23: slowly rotate set main shaft, reads dial gauge A1, A2 and A3 at the reading of each jiggering point and record,

S3: data analysis and judgement

S31: calculate the full throw of each jiggering point, clean throw and relative throw,

Described full throw is the difference of the dial gauge reading of certain jiggering point jiggering point relative to diametric(al), clean throw is the full throw of certain jiggering point and the difference of the full throw of corresponding benchmark jiggering point, and relative throw is for clean throw is divided by the value of the axial line distance between two jiggering points corresponding to this clean throw;

S32: judge the absolute value of the relative throw of lower guide bearing place each jiggering point whether≤0.02mm/m, be considered as unit generation arbor and do not produce flexural deformation, proceed adjustment; Otherwise be considered as unit generation arbor and create flexural deformation, after need processing it, proceed adjustment again;

S33: judge the absolute value of the relative throw of water pilot bearing place each jiggering point whether≤0.02mm/m, be considered as main-shaft axis and deviation do not occur at flange, terminate adjustment; Otherwise be considered as set main shaft axis at flange generation deviation, proceed adjustment;

S34: the adpting flange taking generator shaft and turbine shaft apart, detects the faying face ratio whether >=75% of generator shaft flange and turbine shaft flange;

S35: be, proceeds adjustment, otherwise reconnects the flange of generator shaft and turbine shaft, repeated execution of steps S1, S2 and S3, until faying face ratio >=75% of generator shaft flange and turbine shaft flange;

S4: determine polishing direction and polishing amount

S41: the diametric(al) shown in two jiggering points of water pilot bearing place clean throw maximum absolute value value is polishing direction; The clean throw of maximum absolute value be on the occasion of, polishing amount is from small to large; Clean throw is negative value, and polishing amount from big to small;

S42: calculate polishing amount according to the following formula:

$h=\frac{r\×m}{l}$

In formula: h is polishing amount, r is turbine shaft flange radius, and m is water pilot bearing place clean throw maximum absolute value value, and l is that water pilot bearing place is to turbine shaft flange shaft linear distance;

S5: polishing flange face

S51: install elevating mechanism, unclamp the connecting bolt of generator shaft flange and turbine shaft flange, regulates elevating mechanism to make turbine shaft vertical subsidence at least 350mm;

S52: the diameter in the polishing direction determined with step S41 is benchmark, adopts the straight line perpendicular to datum diameter that the flange face of turbine shaft is divided into 10 regions; And polish from the region that maximum polishing is measured, its polishing amount is the determined polishing amount h of step S42, and to successively decrease successively polishing amount with h/10, until it is complete to polish;

S53: generator shaft and turbine shaft are linked together, repeats step S2, S3, S4 and S5, until set main shaft axis deviation does not occur at flange.

2. hydrogenerator set main shaft axis adjusting process according to claim 1, is characterized in that, step S34 detect generator shaft flange face and turbine shaft flange face in conjunction with ratio whether >=75%, comprising:

S341: the connecting bolt unclamping generator shaft and turbine shaft;

S342: spray red lead powder on the flange face of generator shaft and the flange face of turbine shaft, simultaneously clamping clearance gauge between two flange faces, adopt connecting bolt generator shaft and turbine shaft to be coupled together again;

S343: the connecting bolt again unclamping generator shaft and turbine shaft, takes off clearance gauge, judges ratio clearance gauge being pasted with red lead powder area and flange area.

3. hydrogenerator set main shaft axis adjusting process according to claim 1, it is characterized in that, step S52 also comprises:

S521: adopt inside micrometer to measure the air line distance of each region to generator shaft flange face before polishing, and perform record;

S522: adopt inside micrometer to measure the air line distance of each region to generator shaft flange face after polishing, and with polish before the value that records compare, ensure that the polishing amount in each region meets the requirements;

S523: adopt polished silicon wafer to carry out polishing to transitional region adjacent between two after polishing.