A method, system and device for evaluating the wear of a guide vane shaft sleeve of a hydraulic turbine

Abstract

The present application belongs to the field of hydroelectric power generation, and particularly relates to a guide vane and propeller vane shaft sleeve wear evaluation method, system and equipment. The method comprises the following steps: obtaining a guide vane opening interval and a propeller vane opening interval according to a power interval of each characteristic water head, a water turbine operation characteristic curve and a matching curve; calculating a guide vane angle and a propeller vane angle interval, and then calculating a guide vane tangential sliding distance and a propeller vane tangential sliding distance; then calculating a guide vane water pressure and a propeller vane water pressure according to the characteristic water head; and then calculating a guide vane shaft sleeve wear and a propeller vane shaft sleeve wear according to the guide vane water pressure, the propeller vane water pressure, a propeller vane shaft sleeve pressure and the propeller vane tangential sliding distance. The guide vane shaft sleeve wear and the propeller vane shaft sleeve wear under different guide vane and propeller vane action times are calculated, and the guide vane shaft sleeve wear and the propeller vane shaft sleeve wear under any action times at any water head are obtained. The guide vane and propeller vane shaft sleeve wear degree can be accurately evaluated in real time, and the safety of equipment operation is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of hydroelectric power generation, and particularly relates to a guide vane shaft sleeve wear evaluation method, system and equipment for a hydraulic turbine. BACKGROUND

[0002] The construction of a new power system poses a severe test for the safety and stability of a power grid, and new energy power generation has intermittency, randomness, volatility and anti-peaking, which makes system balance and safety problems more prominent. As the best conventional energy source in terms of regulation performance, the role of hydropower in the new power system will undergo profound changes, gradually changing from 'power generation oriented' to'regulation oriented and power generation supplemented', and will bear more tasks of peak regulation and frequency regulation.

[0003] The frequent participation of hydropower units in power grid regulation poses a severe test for the flexibility and reliability of the action of the guide vane mechanism of the hydraulic turbine. The guide vane of the hydraulic turbine is one of the important components of the unit, and the flow rate of the water entering the hydraulic turbine can be controlled by changing the opening of the guide vane, so as to achieve the purpose of regulating the active power of the unit. As a supporting component for the rotation of the guide vane, the shaft sleeve mainly functions to limit the radial swing of the guide vane, so that the guide vane can move smoothly. In the actual operation of the hydropower unit, due to the influence of factors such as unbalanced water pressure, unit vibration and uneven stress, the guide vane shaft sleeve is subject to a certain degree of wear, especially for units that frequently participate in regulation, the shaft sleeve wear is more serious, resulting in increased water leakage, eccentric wear and jamming, loose fasteners and serious equipment defects such as blade outflow.

[0004] In the related art, the wear of the guide vane shaft sleeve of the hydraulic turbine is mainly evaluated by regular maintenance, and the degree of wear of the shaft sleeve is estimated according to past experience, and then the shaft sleeve is replaced after shutdown.

[0005] In the above related art, in the actual use of the hydraulic turbine, the working condition is constantly changing, and the shaft sleeve may be replaced when the degree of wear does not reach the replacement requirement or the shaft sleeve may be seriously worn without shutdown for maintenance, which affects the safe operation of the equipment. SUMMARY

[0006] The technical problem to be solved by the present application is to provide a guide vane shaft sleeve wear evaluation method, system and equipment for a hydraulic turbine, which can accurately evaluate the wear degree of the guide vane shaft sleeve of the hydraulic turbine in real time and improve the safety of equipment operation.

[0007] A guide vane shaft sleeve wear evaluation method for a hydraulic turbine, comprising:

[0008] A guide vane and its shaft sleeve contact interaction mode are set on a guide vane shaft sleeve wear simulation analysis model, the guide vane comprising a guide vane and a paddle vane;

[0009] A water turbine guide vane shaft sleeve wear model is established, which includes a water turbine guide vane shaft sleeve wear model and a water turbine blade shaft sleeve wear model;

[0010] A preset guide vane action number is set;

[0011] Between the maximum water head and the minimum water head of the water turbine, a plurality of characteristic water heads are taken, to obtain a normal operation power interval corresponding to each characteristic water head of the water turbine guide vane under the action of the preset guide vane action number, according to the normal operation power interval and the water turbine operation characteristic curve, to obtain a guide vane opening corresponding to an endpoint value of the normal operation power interval under each characteristic water head, and according to the guide vane opening corresponding to the endpoint value of the normal operation power interval, a guide vane opening difference value is calculated, and according to the guide vane opening corresponding to the endpoint value of the normal operation power interval and the water turbine coordination curve, a blade opening interval is obtained by an interpolation method, and a blade opening difference value is obtained through the blade opening interval;

[0012] According to the guide vane opening difference value and a guide vane angle calculation formula, a guide vane angle corresponding to the guide vane opening is calculated;

[0013] According to the blade opening difference value and a blade angle calculation formula, a blade angle corresponding to the blade opening is calculated;

[0014] According to the guide vane angle and the blade angle, a guide vane tangential slip distance and a blade tangential slip distance are respectively calculated;

[0015] According to the characteristic water head, a guide vane water pressure acting on the guide vane and a blade water pressure acting on the blade are calculated;

[0016] According to the guide vane water pressure, the blade water pressure, and a shaft sleeve contact interaction mode, a guide vane shaft sleeve pressure and a blade shaft sleeve pressure are obtained;

[0017] According to the guide vane shaft sleeve pressure, the guide vane tangential slip distance, and the water turbine guide vane shaft sleeve wear model, a guide vane shaft sleeve wear amount corresponding to the characteristic water head is obtained, or / and according to the blade shaft sleeve pressure, the blade tangential slip distance, and the water turbine blade shaft sleeve wear model, a blade shaft sleeve wear amount corresponding to the characteristic water head is obtained;

[0018] According to the blade shaft sleeve wear amount corresponding to the characteristic water head, the guide vane shaft sleeve wear amount, and the guide vane action number, a guide vane shaft sleeve wear amount correlation matrix and a blade wear amount correlation matrix are established;

[0019] According to the characteristic water head, the guide vane action times, the guide vane shaft sleeve wear amount correlation matrix and the blade wear amount correlation matrix, a linear interpolation method is used to obtain the guide vane shaft sleeve wear amount and the blade shaft sleeve wear amount under any action times at any water head, and the guide vane shaft sleeve wear amount or / and the blade shaft sleeve wear amount is taken as an evaluation result.

[0020] Optionally, the guide vane shaft sleeve pressure and the blade shaft sleeve pressure are obtained according to the guide vane water pressure, the blade water pressure and the shaft sleeve contact interaction mode, and the guide vane shaft sleeve pressure and the blade shaft sleeve pressure are obtained according to the guide vane water pressure, the blade water pressure and the shaft sleeve contact interaction mode.

[0021] The shaft sleeve contact interaction mode is tangential friction, and the shaft sleeve includes a guide vane shaft sleeve and a blade shaft sleeve, wherein the guide vane shaft sleeve includes an upper shaft sleeve, a middle shaft sleeve and a lower shaft sleeve.

[0022] According to the tangential friction and the pressure calculation formula, the contact pressure is obtained, and the contact pressure includes the guide vane shaft sleeve pressure and the blade shaft sleeve pressure, and the guide vane shaft sleeve pressure includes the upper shaft sleeve pressure, the middle shaft sleeve pressure and the lower shaft sleeve pressure.

[0023] When the guide vane shaft sleeve is the upper shaft sleeve, the pressure calculation formula is:

[0024]

[0025] When the guide vane shaft sleeve is the middle shaft sleeve, the pressure calculation formula is:

[0026]

[0027] When the guide vane shaft sleeve is the lower shaft sleeve, the pressure calculation formula is:

[0028] R a =P s a4-P p a6+R c a5;

[0029] Wherein, P s is the water pressure of the water body acting on the guide vane, P p is the force transmitted by the connecting rod to the guide vane arm, a1, a2, a3, a4, a5 and a6 are length coefficients, which are related to the size of the guide vane, y c , y c2 and y c3 are the degrees of the guide vane, A1 and A2 are the inertia ratio of the guide vane, and K is the degree coefficient of the guide vane.

[0030] When it is the blade shaft sleeve, the pressure calculation formula is:

[0031]

[0032] Wherein, P kPwater is the water pressure of water body acting on the blade, l is the length of the shaft sleeve, z is the number of blade pins, d3 is the distance between the center of the blade pin and the center of the runner, d4 is the diameter of the blade pin, and L4 is the minimum length of the pressure surface. p Pwater is the water pressure of water body acting on the blade, l is the length of the shaft sleeve, z is the number of blade pins, d3 is the distance between the center of the blade pin and the center of the runner, d4 is the diameter of the blade pin, and L4 is the minimum length of the pressure surface.

[0033] Optionally, the method for establishing the wear model of the guide vane shaft sleeve of the guide vane of the hydraulic turbine comprises the following steps:

[0034] Obtaining the tangential slip distance of the guide vane relative to the shaft sleeve;

[0035] Obtaining the contact pressure of the guide vane relative to the shaft sleeve;

[0036] According to the tangential slip distance, the contact pressure and the shaft sleeve wear formula, the wear model of the guide vane shaft sleeve of the guide vane of the hydraulic turbine is established.

[0037] The shaft sleeve wear formula is as follows:

[0038]

[0039] Wherein, V is the wear volume, P is the normal pressure of the contact surface between the component and the material, L is the tangential slip distance between the components, H is the mold hardness, and K is the wear factor.

[0040] Optionally, the method for establishing the wear model of the guide vane shaft sleeve of the guide vane of the hydraulic turbine comprises the following steps:

[0041] According to the normal operation power interval corresponding to each characteristic water head, the two end point values of the normal operation power interval are obtained as a first end point value and a second end point value, and the first end point value is smaller than the second end point value.

[0042] Matching the first end point value and the second end point value with the hydraulic turbine operation characteristic curve to obtain a first guide vane opening degree corresponding to the first end point value and a second guide vane opening degree corresponding to the second end point value.

[0043] Calculating the difference between the second guide vane opening degree and the first guide vane opening degree to obtain the opening difference value.

[0044] According to the second guide vane opening degree, the first guide vane opening degree and the water turbine coordination curve, a first blade opening degree and a second blade opening degree are obtained by using an interpolation method, the first blade opening degree and the second blade opening degree form the blade opening degree interval, and the first blade opening degree and the second blade opening degree are end point values of the blade opening degree interval.

[0045] Optionally, the guide vane sleeve wear amount and the blade sleeve wear amount under the arbitrary action frequency at the arbitrary water head are obtained by using a linear interpolation method according to the feature water head, the guide vane action frequency, the guide vane sleeve wear amount correlation matrix and the blade sleeve wear amount correlation matrix, and the linear interpolation method includes the following steps:

[0046] Obtaining a feature water head interval in which the arbitrary water head is located and a guide vane-blade action frequency interval in which the arbitrary action frequency is located;

[0047] Obtaining end point wear values according to the feature water head interval and the guide vane-blade action frequency interval;

[0048] Obtaining the guide vane sleeve wear amount and the blade sleeve wear amount under the arbitrary action frequency at the arbitrary water head according to the end point wear values and an interpolation formula of the linear interpolation method.

[0049] Optionally, the interpolation formula is as follows:

[0050]

[0051] Wherein, h j,ga is the guide vane sleeve wear amount or the blade sleeve wear amount under the arbitrary action frequency at the arbitrary water head, h j,k-1 and h j,k are wear amounts corresponding to different action frequencies, H k and H k-1 are different water heads, H ga is the current water head, h j-1,ga is the calculated guide vane sleeve wear amount or blade sleeve wear amount, K is the number of feature water heads, and j is the action frequency.

[0052] A water turbine guide vane-blade sleeve wear evaluation system, comprising:

[0053] A setting module configured to set a guide vane-blade contact interaction mode on a water turbine guide vane-blade sleeve wear simulation analysis model, the guide vane-blade including a guide vane and a blade;

[0054] A building module configured to build a water turbine guide vane-blade sleeve wear model, the water turbine guide vane-blade sleeve wear model including a water turbine guide vane sleeve wear model and a water turbine blade sleeve wear model;

[0055] A preset module configured to preset a guide vane-blade action frequency;

[0056] The first calculation module is configured to obtain a normal operation power interval corresponding to each characteristic water head of the guide vane of the water turbine under the preset guide vane action times, by taking a plurality of characteristic water heads between the maximum water head and the minimum water head of the water turbine, and obtain an end point value of the normal operation power interval corresponding to the guide vane opening degree under each characteristic water head according to the normal operation power interval and the water turbine operation characteristic curve, and obtain a guide vane opening degree difference value according to the guide vane opening degree corresponding to the end point value of the normal operation power interval, and obtain a paddle opening interval by an interpolation method according to the guide vane opening degree corresponding to the end point value of the normal operation power interval and the water turbine coordination curve, and obtain a paddle opening degree difference value through the paddle opening interval;

[0057] The second calculation module is configured to calculate the guide vane opening degree corresponding to the guide vane angle according to the guide vane opening degree difference value and a guide vane angle calculation formula.

[0058] The third calculation module is configured to calculate the paddle opening degree corresponding to the paddle angle by the paddle opening degree difference value and a paddle angle calculation formula.

[0059] The fourth calculation module is configured to calculate a guide vane tangential sliding distance and a paddle tangential sliding distance according to the guide vane angle and the paddle angle, respectively.

[0060] The fifth calculation module is configured to calculate a guide vane water pressure acting on the guide vane and a paddle water pressure acting on the paddle according to the characteristic water head.

[0061] The sixth calculation module is configured to obtain a guide vane shaft sleeve pressure and a paddle shaft sleeve pressure according to the guide vane water pressure, the paddle water pressure, and a shaft sleeve contact interaction mode.

[0062] The seventh calculation module is configured to obtain the guide vane shaft sleeve wear amount corresponding to the characteristic water head according to the guide vane shaft sleeve pressure, the guide vane tangential sliding distance, and a water turbine guide vane shaft sleeve wear model, or / and obtain the paddle shaft sleeve wear amount corresponding to the characteristic water head according to the paddle shaft sleeve pressure, the paddle tangential sliding distance, and a water turbine paddle shaft sleeve wear model.

[0063] The correlation module is configured to establish a guide vane shaft sleeve wear amount correlation matrix and a paddle wear amount correlation matrix according to the paddle shaft sleeve wear amount corresponding to the characteristic water head, the guide vane shaft sleeve wear amount, and the guide vane action times.

[0064] The evaluation module is configured to obtain the guide vane shaft sleeve wear amount and the paddle shaft sleeve wear amount under any action times at any water head by using a linear interpolation method according to the characteristic water head, the guide vane action times, the guide vane shaft sleeve wear amount correlation matrix, and the paddle wear amount correlation matrix, and take the guide vane shaft sleeve wear amount or / and the paddle shaft sleeve wear amount as an evaluation result.

[0065] Optionally, the first calculation module comprises:

[0066] a corresponding unit, configured to obtain two endpoint values of the normal operation power interval as a first endpoint value and a second endpoint value according to the normal operation power interval corresponding to each characteristic water head, the first endpoint value being smaller than the second endpoint value;

[0067] a matching unit, configured to match the first endpoint value and the second endpoint value with the water turbine operation characteristic curve to obtain a first guide vane opening degree corresponding to the first endpoint value and a second guide vane opening degree corresponding to the second endpoint value;

[0068] a first calculation unit, configured to calculate a difference value of the second guide vane opening degree and the first guide vane opening degree to obtain a guide vane opening degree difference value;

[0069] a second calculation unit, configured to obtain a first paddle opening degree and a second paddle opening degree according to the second guide vane opening degree, the first guide vane opening degree and the water turbine matching curve by using an interpolation method, the first paddle opening degree and the second paddle opening degree forming the paddle opening degree interval, the first paddle opening degree and the second paddle opening degree being endpoint values of the paddle opening degree interval.

[0070] A terminal device comprises a memory and a processor, the memory stores a computer program capable of running on the processor, and the processor loads and executes the computer program to adopt a water turbine guide paddle shaft sleeve wear evaluation method.

[0071] A computer readable storage medium stores a computer program, and the computer program is loaded and executed by a processor to adopt a water turbine guide paddle shaft sleeve wear evaluation method.

[0072] The present application has the following beneficial effects:

[0073] 1、The application obtains the normal power operation interval under different characteristic water heads, obtains the guide vane opening interval and the paddle opening interval corresponding to the normal power operation interval, then calculates the guide vane opening difference and the guide paddle opening difference according to the guide vane opening interval and the paddle opening interval respectively, then obtains the guide vane angle and the paddle angle, calculates the guide vane tangential sliding distance and the paddle tangential sliding distance according to the guide vane angle and the paddle angle respectively, calculates the guide vane water pressure and the paddle water pressure according to the characteristic water head, then obtains the guide vane shaft sleeve pressure and the paddle shaft sleeve pressure according to the guide vane water pressure, the paddle water pressure and the shaft sleeve contact interaction mode, inputs the guide vane shaft sleeve pressure, the guide vane tangential sliding distance, the paddle tangential sliding distance and the paddle shaft sleeve pressure into the water turbine guide paddle shaft sleeve wear model to obtain the guide paddle shaft sleeve wear amount and the guide vane shaft sleeve wear amount, establishes the guide vane shaft sleeve wear amount correlation matrix and the paddle wear amount correlation matrix related to the characteristic water head and the guide paddle action times, so that the guide vane shaft sleeve wear amount and the paddle shaft sleeve wear amount under any action times under any water head can be obtained according to the interpolation method. Compared with regular maintenance, the guide vane shaft sleeve wear amount and the paddle shaft sleeve wear amount can be accurately obtained according to the action times and the water head, avoiding the situation that the shaft sleeve is excessively worn under different working conditions, causing safety hazards of equipment or increasing the shutdown times due to early replacement.

[0074] 2、Since the guide vane shaft sleeve wear amount and the paddle shaft sleeve wear amount under any action times under any water head can be obtained, the correlation relationship curve of the water head, the guide vane action times and the guide vane shaft sleeve wear amount or the correlation relationship curve of the water head, the paddle action times and the paddle shaft sleeve wear amount can be established, the future wear of the shaft sleeve is speculated according to the actual operation condition, and the replacement is arranged in advance, reducing safety hazards. BRIEF DESCRIPTION OF DRAWINGS

[0075] Figure 1 It is a water turbine guide paddle shaft sleeve wear evaluation method flowchart of the application;

[0076] Figure 2 It is a structure schematic diagram of the water turbine guide vane simulation model of the application;

[0077] Figure 3 It is a structure schematic diagram of another view of the water turbine guide vane simulation model of the application;

[0078] Figure 4 It is a structure schematic diagram of the water turbine paddle simulation model of the application;

[0079] Figure 5 It is a structure schematic diagram of another view of the water turbine paddle simulation model of the application;

[0080] Figure 6The present application is a water turbine guide vane and propeller vane coupling curve under different water heads;

[0081] Figure 7 The present application is an interpolation calculation process schematic diagram.

[0082] The figure mark explanation: 1, movable guide vane; 2, guide vane upper shaft sleeve; 3, guide vane middle shaft sleeve; 4, guide vane lower shaft sleeve; 5, sleeve; 6, guide vane crank arm; 7, guide vane connecting rod; 8, control ring; 9, propeller vane blade; 10, propeller vane crank arm; 11, propeller vane shaft sleeve; 12, propeller vane connecting rod. DETAILED DESCRIPTION

[0083] A water turbine guide vane and propeller vane shaft sleeve wear evaluation method, as shown in the figure, comprises: Figure 1

[0084] S1, setting the guide vane and propeller vane and its shaft sleeve contact interaction mode on the water turbine guide vane and propeller vane shaft sleeve wear simulation analysis model, the guide vane and propeller vane comprising a guide vane and a propeller vane.

[0085] Specifically, as shown in the figures, Figure 2 and Figure 3 The water turbine guide vane simulation model comprises a movable guide vane 1, guide vane shaft sleeves (guide vane upper shaft sleeve 2, guide vane middle shaft sleeve 3 and guide vane lower shaft sleeve 4), sleeve 5, guide vane crank arm 6, guide vane connecting rod 7 and control ring 8. As shown in the figures, Figure 4 and Figure 5 The propeller vane simulation model comprises propeller vane blade 9, propeller vane crank arm 10, propeller vane shaft sleeve 11 and propeller vane connecting rod 12. For the assembly of the guide vane operating mechanism, first fix the control ring 8, then connect and fix the control ring 8 and guide vane crank arm 6 according to the drawn guide vane connecting rod 7, fix the relevant shaft sleeves and sleeve 5 to the corresponding parts of the guide vane, and finally constrain the movable guide vane 1 and the guide vane crank arm 6 to complete the assembly. For the assembly of the propeller vane operating mechanism, first fix the propeller vane crank arm 10, connect the propeller vane crank arm 10 and the relay guide bush control drive through the propeller vane connecting rod 12, then fix the relevant shaft sleeves to the corresponding positions, and finally constrain the propeller vane and the propeller vane crank arm 10 to complete the assembly. In order to ensure the smooth progress of subsequent mesh division and other work, reasonable simplification is performed on each component, such as ignoring small pin holes and other details. The propeller vane simulation model and the guide vane simulation model constitute the water turbine guide vane and propeller vane shaft sleeve 11 wear simulation analysis model.

[0086] Global meshing is performed on the shaft sleeve, then the mesh control attribute is set as global hexahedral mesh, and the unit attribute is set as enhanced hourglass control. Adaptive meshing technology is used to eliminate the worn material and maintain high-quality mesh based on the high-efficiency simulation calculation method of the extrapolation method, the adaptive meshing redraw area is set as all the internal nodes of the contact, and a certain redraw frequency is set to ensure the calculation accuracy.

[0087] ​S2, a water turbine guide vane shaft sleeve wear model is established, the water turbine guide vane shaft sleeve wear model comprises a water turbine guide vane shaft sleeve wear model and a water turbine blade shaft sleeve wear model.

[0088] Specifically, the water turbine guide vane shaft sleeve wear model is used to calculate the guide vane shaft sleeve wear amount, the water turbine blade shaft sleeve wear model is used to calculate the blade shaft sleeve wear amount, and the water turbine guide blade shaft sleeve wear model is established by comprising:

[0089] S20, a tangential slip distance of the guide blade relative to the shaft sleeve is obtained.

[0090] Specifically, the tangential slip distance refers to the relative displacement or slip between two contact surfaces in the tangential direction (i.e., the parallel direction of the contact surface). The tangential slip distance is obtained by multiplying the guide vane angle by the guide vane radius or multiplying the blade angle by the blade radius.

[0091] S21, a contact pressure of the guide blade relative to the shaft sleeve is obtained.

[0092] Specifically, the contact pressure of the guide blade relative to the shaft sleeve is the contact pressure of the guide vane relative to the shaft sleeve or the contact pressure of the blade relative to the shaft sleeve, and the contact pressure can be calculated by the guide vane water pressure or the blade water pressure.

[0093] S22, a water turbine guide blade shaft sleeve wear model is established according to the tangential slip distance, the contact pressure and the shaft sleeve wear formula.

[0094] The shaft sleeve wear formula is:

[0095]

[0096] Wherein, V is the wear volume, P is the normal pressure of the contact surface of the component and the material, L is the tangential slip distance between the components, H is the mold hardness, K is the wear factor, the component is the guide vane or the blade, dV, dP and dL are derivatives.

[0097] The wear formulas of the water turbine guide vane shaft sleeve wear model and the water turbine blade shaft sleeve wear model are the same, and the difference lies in the input contact pressure. The guide vane shaft sleeve model inputs the contact pressure of the guide vane relative to the shaft sleeve, and the blade shaft sleeve wear model inputs the contact pressure of the blade relative to the shaft sleeve.

[0098] S3, presetting the number of guide blade actions.

[0099] Specifically, when simulating, the number of guide blade actions can be set by oneself to obtain the wear amount of the shaft sleeve under different guide blade action numbers.

[0100] S4, between the maximum water head and the minimum water head of the hydraulic turbine, a plurality of characteristic water heads are taken to obtain a normal operation power interval corresponding to each characteristic water head of the guide vane of the hydraulic turbine under the preset guide vane action times, according to the normal operation power interval and the operation characteristic curve of the hydraulic turbine, the guide vane opening corresponding to the end point value of the normal operation power interval under each characteristic water head is obtained, and the guide vane opening difference value is calculated according to the guide vane opening corresponding to the end point value of the normal operation power interval, and according to the guide vane opening corresponding to the end point value of the normal operation power interval and the coordinated curve of the hydraulic turbine, the paddle opening interval is obtained by the interpolation method, and the paddle opening difference value is obtained through the paddle opening interval.

[0101] The plurality of characteristic water heads are taken between the maximum water head and the minimum water head of the hydraulic turbine to obtain a normal operation power interval corresponding to each characteristic water head of the guide vane of the hydraulic turbine under the preset guide vane action times, according to the normal operation power interval and the operation characteristic curve of the hydraulic turbine, the guide vane opening corresponding to the end point value of the normal operation power interval under each characteristic water head is obtained, and the guide vane opening difference value is calculated according to the guide vane opening corresponding to the end point value of the normal operation power interval, and according to the guide vane opening corresponding to the end point value of the normal operation power interval and the coordinated curve of the hydraulic turbine, the paddle opening interval is obtained by the interpolation method, and the paddle opening difference value is obtained through the paddle opening interval.

[0102] S40, according to the normal operation power interval corresponding to each characteristic water head, the two end point values of the normal operation power interval are obtained as a first end point value and a second end point value, and the first end point value is smaller than the second end point value.

[0103] Specifically, between the maximum water head H max and the minimum water head H min of the hydraulic turbine, five characteristic water heads are selected, H1=H max , H5=H min , H1>H2>H3>H4>H, according to the field test of the vibration zone of the hydroelectric generating set, the normal operation power interval corresponding to the five characteristic water heads is [P 11 , P 12 ], [P 21 , P 22 ], [P 31 , P 32 ], [P 41 , P 42 ], and [P 51 , P 52 ], the first end point value is the minimum value of the power normal operation power interval, for example, P 11 and P 21 , and the second end point value is the maximum value of the power normal operation power interval, for example, P 12 and P 22.

[0104] S41. Match the first endpoint value and the second endpoint value with the turbine operating characteristic curve to obtain the first guide vane opening corresponding to the first endpoint value and the second guide vane opening corresponding to the second endpoint value.

[0105] Specifically, the turbine operating characteristic curve describes the turbine head, active power, guide vane opening, and flow rate. By obtaining the turbine head and active power along different guide vane opening lines, and ensuring that the turbine head values ​​are consistent on each guide vane opening line, a turbine active power matrix is ​​constructed.

[0106] S42. Calculate the difference between the opening of the second guide vane and the opening of the first guide vane to obtain the guide vane opening difference.

[0107] S43. Based on the second guide vane opening, the first guide vane opening, and the turbine coordination curve, the first blade opening and the second blade opening are obtained by interpolation. The first blade opening and the second blade opening form the blade opening interval, and the first blade opening and the second blade opening are used as the endpoint values ​​of the blade opening interval.

[0108] S44. Obtain the blade opening difference based on the endpoint values ​​of the blade opening interval.

[0109] Specifically, assume there are n guide vane equal opening lines on the turbine's operating characteristic curve, and the guide vane opening on each equal opening line is {Y1, Y2, ..., Y...} n}, obtain m turbine heads H, and get {H1,H2,…,H} m}, then the constructed active power P parameter matrix of the water turbine can be expressed as:

[0110]

[0111] Based on the turbine head H and the turbine active power P, the corresponding guide vane opening Y can be obtained using linear interpolation. This allows us to obtain [P...] 11 ,P 12 ]、[P 21 ,P 22 ]、[P 31 ,P 32 ]、[P 41 ,P 42 ]、[P 51 ,P 52 The corresponding guide vane opening [Y] 11 ,Y 12 ]、[Y 21 ,Y 22 ]、[Y 31 ,Y 32 ]、[Y 41 ,Y 42 ]、[Y51 ,Y 52 ].

[0112] For propeller turbines, the turbine coordination curves corresponding to guide vane opening Y and blade opening Z at different heads are shown in the attached figure. Figure 6 As shown, the turbine head H and guide vane opening [Y] can be determined based on the turbine head H and guide vane opening [Y]. 11 ,Y 12 ]、[Y 21 ,Y 22 ]、[Y 31 ,Y 32 ]、[Y 41 ,Y 42 ]、[Y 51 ,Y 52 Interpolation yields the blade opening [Z]. 11 Z 12 ]、[Z 21 Z 22 ]、[Z 31 Z 32 ]、[Z 41 Z 42 ]、[Z 51 Z 52 ].

[0113] The turbine coordination curve describes the turbine power curve under different guide vane opening, blade opening, and head conditions.

[0114] Calculate the guide vane actuation amplitude ΔY1 = Y under five characteristic heads. 12 -Y 11 ΔY2=Y 22 -Y 21 ΔY3=Y 32 -Y 31 ΔY4=Y 42 -Y 41 ΔY5=Y 52 -Y 51 ; ΔZ1=Z 12 -Z 11 ΔZ2=Z 22 -Z 21 ΔZ3=Z 32 -Z 31 ΔZ4=Z 42 -Z 41 ΔZ5=Z 52 -Z 51。

[0115] S5. Calculate the guide vane angle corresponding to the guide vane opening based on the guide vane opening difference and the guide vane angle calculation formula.

[0116] S6, calculate the blade angle corresponding to the blade opening through the blade opening difference value and the blade angle calculation formula.

[0117] Specifically, the guide vane angle calculation formula is:

[0118]

[0119] The blade angle calculation formula is:

[0120]

[0121] Y max is the maximum displacement of the guide vane servomotor, Y is the actual displacement of the guide vane servomotor, α max is the maximum angle corresponding to the guide vane opening, Z max is the maximum displacement of the blade servomotor, Z is the actual displacement of the blade servomotor, β max is the maximum angle corresponding to the blade opening.

[0122] In the calculation, ΔY is used instead of Y, and ΔZ is used instead of Z to calculate the guide vane angle and the blade angle.

[0123] S7, calculate the guide vane tangential slip distance and the blade tangential slip distance according to the guide vane angle and the blade angle respectively.

[0124] Specifically, the guide vane tangential slip distance is equal to the guide vane radius multiplied by the guide vane angle, and the blade tangential slip distance is equal to the blade radius multiplied by the blade angle.

[0125] S8, calculate the guide vane water pressure acting on the guide vane and the blade water pressure acting on the blade according to the characteristic water head.

[0126] Specifically, first, substitute the water heads H1, H2, H3, H4 and H5 into the guide vane water pressure calculation formula and the blade water pressure calculation formula, and replace H to calculate the guide vane water pressure P s acting on the guide vane and the blade water pressure P k acting on the blade.

[0127] The guide vane water pressure calculation formula is:

[0128]

[0129] In the formula, D0 is the diameter of the guide vane distribution circle, b0 is the guide vane height, and Z0 is the number of guide vanes.

[0130] The blade water pressure calculation formula is:

[0131]

[0132] In the formula, K is the water turbine water thrust coefficient, and D1 is the water turbine runner diameter

[0133] S9, obtaining the guide vane shaft sleeve pressure and the blade shaft sleeve pressure according to the guide vane water pressure, the blade water pressure and the shaft sleeve contact interaction mode.

[0134] Obtaining the guide vane shaft sleeve pressure and the blade shaft sleeve pressure according to the guide vane water pressure, the blade water pressure and the shaft sleeve contact interaction mode includes:

[0135] S90, the shaft sleeve contact interaction mode is tangential friction, and the shaft sleeve includes a guide vane shaft sleeve and a blade shaft sleeve, wherein the guide vane shaft sleeve includes an upper shaft sleeve, a middle shaft sleeve and a lower shaft sleeve.

[0136] Specifically, the surface contact between the shaft and the shaft sleeve is set, the inside of the shaft sleeve that occurs wear is the main surface, the movable shaft that does not occur wear is the from surface, and the contact attribute is set as tangential friction.

[0137] S91, obtaining the contact pressure according to the tangential friction and the pressure calculation formula, the contact pressure includes the guide vane shaft sleeve pressure and the blade shaft sleeve pressure, and the guide vane shaft sleeve pressure includes the upper shaft sleeve pressure, the middle shaft sleeve pressure and the lower shaft sleeve pressure.

[0138] When the guide vane shaft sleeve is the upper shaft sleeve, the pressure calculation formula is:

[0139]

[0140] When the guide vane shaft sleeve is the middle shaft sleeve, the pressure calculation formula is:

[0141]

[0142] When the guide vane shaft sleeve is the lower shaft sleeve, the pressure calculation formula is:

[0143] R a =P s a4-P p a6+R c a5;

[0144] Wherein, P s is the water pressure of the water acting on the guide vane, P p is the force transmitted to the guide vane arm, a1, a2, a3, a4, a5, a6 and a7 are length coefficients, which are related to the size of the guide vane, y c , y c2 and y c3 are the perturbations of the guide vane, A1 and A2 are the moment of inertia ratios of the guide vane, K is the perturbation coefficient of the guide vane, y c is the total perturbation of P s , P p and R c on the guide vane upper shaft sleeve, y c2 is the total perturbation of P pThe disturbance generated by the upper shaft sleeve of the guide vane, y c3 A1 is the ratio of the moment of inertia of the guide vane center shaft to the moment of inertia of the shaft neck at the lower sleeve, and A2 is the ratio of the moment of inertia of the guide vane center shaft to the moment of inertia of the shaft neck at the middle sleeve.

[0145] The length coefficient relationship is as follows:

[0146]

[0147] a3=a1+a2

[0148]

[0149] Wherein, L is the distance from the lower sleeve of the guide vane to the middle sleeve, l1 is the distance from the lower sleeve to the bottom of the guide vane blade, l2 is the length of the guide vane flow part, l3 is the distance from the middle sleeve of the guide vane to the top of the guide vane blade, l4 is the distance from the middle sleeve of the guide vane to the bottom of the guide vane shaft, and l5 is the distance from the middle sleeve of the guide vane to the bottom of the guide vane shaft.

[0150] When it is a paddle sleeve, the pressure calculation formula is:

[0151]

[0152] Wherein, P k is the water pressure of the water body acting on the paddle, l p is the length of the sleeve, z is the number of blade pins, d3 is the distance of the center of the blade pin relative to the center of the runner, d4 is the diameter of the blade pin, and L4 is the minimum length of the pressure surface.

[0153] The blade pin is mainly used for fixing and connecting the moving blade and the rotating shaft or other parts. Through precise installation and design, the blade pin ensures that the blade can effectively rotate on the shaft and reduces wear.

[0154] S10, according to the guide vane sleeve pressure, the guide vane tangential slip distance and the water turbine guide vane sleeve wear model, the guide vane sleeve wear amount corresponding to the characteristic water head is obtained, or / and according to the paddle sleeve pressure, the paddle tangential slip distance and the water turbine paddle sleeve wear model, the paddle sleeve wear amount corresponding to the characteristic water head is obtained.

[0155] Specifically, in the water turbine guide paddle sleeve wear model, P in the sleeve wear formula is the paddle sleeve pressure or the guide vane sleeve pressure, and L is the guide vane tangential slip distance or the paddle tangential slip distance. When calculating the guide vane sleeve wear, the guide vane tangential slip distance and the guide vane sleeve pressure are used, and when calculating the paddle sleeve wear, the paddle sleeve pressure and the paddle tangential slip distance are used.

[0156] S11, establish a guide vane bushing wear amount correlation matrix and a paddle wear amount correlation matrix according to the paddle bushing wear amount, the guide vane bushing wear amount and the guide paddle action frequency corresponding to the characteristic water head.

[0157] Specifically, through the bushing wear simulation under the guide paddle action of the water turbine, the correlation matrix of H, the reciprocating action frequency N and the wear amount h under different water heads is obtained, as shown in the following formula:

[0158] {H1, H2,..., H5}

[0159] {n1, n2,..., nm}

[0160]

[0161] S12, obtain the guide vane bushing wear amount and the paddle bushing wear amount under any action frequency at any water head by using the linear interpolation method according to the characteristic water head, the guide paddle action frequency, the guide vane bushing wear amount correlation matrix and the paddle wear amount correlation matrix, and take the guide vane bushing wear amount or / and the paddle bushing wear amount as the evaluation result.

[0162] According to the characteristic water head, the guide paddle action frequency, the guide vane bushing wear amount correlation matrix and the paddle wear amount correlation matrix, the linear interpolation method is used to obtain the guide vane bushing wear amount and the paddle bushing wear amount under any action frequency at any water head, including:

[0163] S120, obtain the characteristic water head interval in which any water head is located and the guide paddle action frequency interval in which any action frequency is located.

[0164] Specifically, the wear amount h ga under any water head H ga and any action frequency n ga is calculated by using the linear interpolation method, first find the interval in which the water head H ga is located in H1~H2, that is, H k-1 <H ga <H k ,(2≤k≤5) find the interval in which the action frequency n ga is located in n1~n m , n j-1 <n ga <n j ,(2≤j≤m), wherein m is the maximum action frequency and K is the number of selected characteristic water heads.

[0165] S121, obtain the end wear value according to the characteristic water head interval and the guide paddle action frequency interval.

[0166] Specifically, the endpoint wear value is a wear value corresponding to an endpoint of a characteristic head and an endpoint wear value corresponding to an endpoint of a guide vane action frequency, as shown in the following table. Figure 7

[0167] S122, according to the endpoint wear value and the interpolation formula of the linear interpolation method, the guide vane bushing wear and the paddle bushing wear under any action frequency at any head are obtained.

[0168] Specifically, the interpolation formula is as follows:

[0169]

[0170] wherein, h j,ga is the guide vane bushing wear or the paddle bushing wear under any action frequency at any head, h j,k-1 and h j,k are wear values corresponding to different action frequencies, H k and H k-1 are different heads, H ga is the current head, h j-1,ga is the calculated guide vane bushing wear or paddle bushing wear, K is the number of characteristic heads, and j is the action frequency.

[0171] At this time, the correlation between the guide vane bushing wear and the paddle bushing wear under any action frequency at any head can be known.

[0172] A water turbine guide paddle bushing wear evaluation system comprises:

[0173] A setting module is configured to set a guide paddle blade and its bushing contact interaction mode on a water turbine guide paddle bushing wear simulation analysis model, wherein the guide paddle blade comprises a guide vane and a paddle blade.

[0174] A building module is configured to build a water turbine guide paddle bushing wear model, wherein the water turbine guide paddle bushing wear model comprises a water turbine guide vane bushing wear model and a water turbine paddle bushing wear model.

[0175] A preset module is configured to preset a guide paddle blade action frequency.

[0176] ​The first calculation module is configured to obtain a normal operation power interval corresponding to each characteristic water head of the guide vane of the water turbine under the preset guide vane action times, obtain an end point value of the normal operation power interval corresponding to each characteristic water head according to the normal operation power interval and a water turbine operation characteristic curve, and obtain a guide vane opening difference according to the guide vane opening corresponding to the end point value of the normal operation power interval, and obtain a paddle opening interval by an interpolation method according to the guide vane opening corresponding to the end point value of the normal operation power interval and a water turbine coordination curve, and obtain a paddle opening difference through the paddle opening interval.

[0177] The second calculation module is configured to calculate a guide vane angle corresponding to the guide vane opening according to the guide vane opening difference and a guide vane angle calculation formula.

[0178] The third calculation module is configured to calculate a paddle angle corresponding to the paddle opening according to the paddle opening difference and a paddle angle calculation formula.

[0179] The fourth calculation module is configured to calculate a guide vane tangential sliding distance and a paddle tangential sliding distance according to the guide vane angle and the paddle angle, respectively.

[0180] The fifth calculation module is configured to calculate a guide vane water pressure acting on the guide vane and a paddle water pressure acting on the paddle according to the characteristic water head.

[0181] The sixth calculation module is configured to obtain a guide vane shaft sleeve pressure and a paddle shaft sleeve pressure according to the guide vane water pressure, the paddle water pressure and a shaft sleeve contact interaction mode.

[0182] The seventh calculation module is configured to obtain a guide vane shaft sleeve wear amount corresponding to the characteristic water head according to the guide vane shaft sleeve pressure, the guide vane tangential sliding distance and a water turbine guide vane shaft sleeve wear model, or / and obtain a paddle shaft sleeve wear amount corresponding to the characteristic water head according to the paddle shaft sleeve pressure, the paddle tangential sliding distance and a water turbine paddle shaft sleeve wear model.

[0183] The correlation module is configured to establish a guide vane shaft sleeve wear amount correlation matrix and a paddle wear amount correlation matrix according to the paddle shaft sleeve wear amount corresponding to the characteristic water head, the guide vane shaft sleeve wear amount and the guide vane action times.

[0184] The evaluation module is configured to obtain a guide vane shaft sleeve wear amount and a paddle shaft sleeve wear amount under any action times at any water head by a linear interpolation method according to the characteristic water head, the guide vane action times, the guide vane shaft sleeve wear amount correlation matrix and the paddle wear amount correlation matrix, and take the guide vane shaft sleeve wear amount or / and the paddle shaft sleeve wear amount as an evaluation result.

[0185] The first calculation module comprises:

[0186] A corresponding unit is configured to obtain two endpoint values of the normal operation power interval as a first endpoint value and a second endpoint value according to each characteristic water head corresponding normal operation power interval, wherein the first endpoint value is smaller than the second endpoint value.

[0187] A matching unit is configured to match the first endpoint value and the second endpoint value with the water turbine operation characteristic curve to obtain a first guide vane opening degree corresponding to the first endpoint value and a second guide vane opening degree corresponding to the second endpoint value.

[0188] A first calculation unit is configured to calculate a difference value of the second guide vane opening degree and the first guide vane opening degree to obtain a guide vane opening degree difference value.

[0189] A second calculation unit is configured to obtain a first paddle opening degree and a second paddle opening degree by using an interpolation method according to the second guide vane opening degree, the first guide vane opening degree and a water turbine matching curve, wherein the first paddle opening degree and the second paddle opening degree form the paddle opening degree interval, and the first paddle opening degree and the second paddle opening degree are used as endpoint values of the paddle opening degree interval.

[0190] The embodiment of the application further discloses a terminal device comprising a memory and a processor, the memory stores a computer program capable of running on the processor, and when the processor loads and executes the computer program, a water turbine guide paddle shaft sleeve wear evaluation method is adopted.

[0191] The terminal device can adopt a desktop computer, a notebook computer or a cloud server computer device, and the terminal device comprises but is not limited to a processor and a memory, for example, the terminal device can further comprise an input and output device, a network access device and a bus, etc.

[0192] The processor can adopt a central processing unit (CPU), of course, according to the actual use condition, other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), ready-to-program gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. can also be adopted, the general-purpose processor can adopt a microprocessor or any conventional processor, etc., and the application does not make any limitation thereto.

[0193] The memory can be an internal storage unit of the terminal device, for example, a hard disk or a memory of the terminal device, or an external storage device of the terminal device, for example, a plug-in hard disk, a smart memory card (SMC), a secure digital card (SD), or a flash card (FC) equipped on the terminal device, or a combination of the internal storage unit and the external storage device of the terminal device. The memory is used to store a computer program and other programs and data required by the terminal device, and can also be used to temporarily store data that has been output or will be output. The present application does not limit this.

[0194] The terminal device stores the water turbine guide vane shaft sleeve wear evaluation method in the memory of the terminal device, and loads and executes the method on the processor of the terminal device, thereby facilitating use.

[0195] The present application also discloses a computer readable storage medium, and the computer readable storage medium stores a computer program. When the computer program is executed by a processor, the water turbine guide vane shaft sleeve wear evaluation method is used.

[0196] The computer program can be stored in a computer readable medium, and the computer program includes computer program code. The computer program code can be in the form of source code, object code, an executable file, or some middleware form. The computer readable medium includes any entity or device, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. that can carry computer program code. It should be noted that the computer readable medium includes but is not limited to the above-mentioned components.

[0197] The computer readable storage medium stores the water turbine guide vane shaft sleeve wear evaluation method in the computer readable storage medium, and loads and executes the method on the processor, thereby facilitating storage and application of the method.

[0198] It should be understood by those skilled in the art that the above discussion of any embodiment is only exemplary and is not intended to limit the scope of protection of the present application to these examples; the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes to the different aspects of one or more embodiments of the present application as described above. In order to be brief, they are not provided in detail.

[0199] It is intended that the embodiments of the application herein disclosed meet all the written requirements of the patent statutes and come within the judicial doctrines of equivalents and will not be construed to be limited to the embodiments shown and described and by the keeping within the spirit and scope of the embodiments of the application.

Claims

1. A method for evaluating the wear of a turbine guide vane bushing, characterized in that, include: In the simulation analysis model of wear of guide blade bushing of water turbine, the contact interaction mode of guide blade and its bushing is set. Guide blade includes guide blade and blade. A wear model for the guide vane bushing of a water turbine is established, which includes a wear model for the guide vane bushing and a wear model for the blade bushing of the water turbine. Preset the number of guide vane movements; Between the maximum and minimum head of the turbine, several characteristic heads are taken to obtain the normal operating power range corresponding to each characteristic head under the preset number of times the turbine guide vanes are operated. Based on the normal operating power range and the turbine operating characteristic curve, the guide vane opening corresponding to the endpoint value of the normal operating power range under each characteristic head is obtained. The guide vane opening difference is calculated based on the guide vane opening corresponding to the endpoint value of the normal operating power range. Based on the guide vane opening corresponding to the endpoint value of the normal operating power range and the turbine coordination curve, the blade opening range is obtained by interpolation. The blade opening difference is obtained through the blade opening range. Based on the guide vane opening difference and the guide vane angle calculation formula, the guide vane angle corresponding to the guide vane opening is calculated. The blade angle corresponding to the blade opening is calculated by using the blade opening difference and the blade angle calculation formula. The tangential slip distance of the guide vane and the tangential slip distance of the propeller blade are calculated based on the guide vane angle and the propeller blade angle, respectively. The guide vane water pressure and the blade water pressure acting on the blade are calculated based on the characteristic head. Based on the guide vane water pressure, the blade water pressure, and the bushing contact interaction mode, the guide vane bushing pressure and the blade bushing pressure are obtained. The wear amount of the guide vane bushing corresponding to the characteristic head is obtained based on the guide vane bushing pressure, the guide vane tangential sliding distance, and the turbine guide vane bushing wear model; or / and the wear amount of the blade bushing corresponding to the characteristic head is obtained based on the blade bushing pressure, the blade tangential sliding distance, and the turbine blade bushing wear model. Based on the wear amount of the blade bushing corresponding to the characteristic head, the wear amount of the guide blade bushing, and the number of guide blade movements, establish a correlation matrix for the wear amount of the guide blade bushing and a correlation matrix for the wear amount of the blade. Based on the correlation matrix of characteristic head, number of guide vane actions, guide vane bushing wear, and blade wear, linear interpolation is used to obtain the guide vane bushing wear and blade bushing wear under any head and any number of actions. The guide vane bushing wear and / or the blade bushing wear are used as the evaluation results.

2. The method for evaluating the wear of the turbine guide vane bushing as described in claim 1, characterized in that, The process of obtaining the guide vane bushing pressure and the propeller bushing pressure based on the guide vane water pressure, the propeller blade water pressure, and the bushing contact interaction mode includes: The bushings interact through tangential friction. The bushings include guide vane bushings and blade bushings, wherein the guide vane bushings include an upper bushing, a middle bushing, and a lower bushing. Based on the tangential friction and pressure calculation formula, the contact pressure is obtained. The contact pressure includes the guide vane bushing pressure and the blade bushing pressure. The guide vane bushing pressure includes the upper bushing pressure, the middle bushing pressure and the lower bushing pressure. When the guide vane bushing is the upper bushing, the pressure calculation formula is: ； When the guide vane bushing is a central bushing, the pressure calculation formula is: ； When the guide vane bushing is the lower bushing, the pressure calculation formula is: ； Among them, P s P is the water pressure exerted on the guide vane by the water body. p For the force transmitted to the guide vane arm, a1, a2, a3, a4, a5, a6, and a7 are length coefficients, related to the size of the guide vane, and y c y c2 and y c3 Let A1 and A2 be the deflection of the guide vane, A1 and A2 be the ratio of the moments of inertia of the guide vane, and K be the deflection coefficient of the guide vane. When it is a blade bushing, the pressure calculation formula is: ； in, P k The water pressure exerted on the blades by the water body. l p The length of the bushing z This refers to the number of blade pins. d 3 represents the distance between the center of the blade pin and the center of the runner. d 4. Blade pin diameter, L 4 represents the minimum length of the pressure surface.

3. The method for evaluating the wear of the turbine guide vane bushing as described in claim 1, characterized in that, The establishment of the turbine guide vane bushing wear model includes: Obtain the tangential sliding distance of the guide blade relative to the bushing; Obtain the contact pressure of the guide vane relative to the bushing; Based on the tangential sliding distance, the contact pressure, and the bushing wear formula, a wear model for the turbine guide vane bushing is established. The formula for bushing wear is: ； Where V is the wear volume, P is the normal pressure of the contact surface between the component and the material, L is the tangential sliding distance between the components, H is the mold hardness, and M is the wear factor.

4. The method for evaluating the wear of the turbine guide vane bushing as described in claim 1, characterized in that, The process involves taking several characteristic heads between the maximum and minimum head of the turbine to obtain the normal operating power range corresponding to each characteristic head for each of the turbine guide vanes under the preset number of guide vane actions. Based on the normal operating power range and the turbine operating characteristic curve, the guide vane opening corresponding to the endpoint value of the normal operating power range under each characteristic head is obtained. The guide vane opening difference is calculated based on the guide vane opening corresponding to the endpoint value of the normal operating power range. Furthermore, based on the guide vane opening corresponding to the endpoint value of the normal operating power range and the turbine coordination curve, the blade opening range is obtained through interpolation. The blade opening difference obtained through the blade opening range includes: Based on the normal operating power range corresponding to each characteristic head, two endpoint values ​​of the normal operating power range are obtained as the first endpoint value and the second endpoint value, wherein the first endpoint value is less than the second endpoint value. By matching the first endpoint value and the second endpoint value with the turbine operating characteristic curve, the first guide vane opening corresponding to the first endpoint value and the second guide vane opening corresponding to the second endpoint value are obtained. Calculate the difference between the second guide vane opening and the first guide vane opening to obtain the guide vane opening difference; Based on the second guide vane opening, the first guide vane opening, and the turbine coherence curve, the first blade opening and the second blade opening are obtained by interpolation. The first blade opening and the second blade opening constitute the blade opening interval, and the first blade opening and the second blade opening serve as the endpoint values ​​of the blade opening interval. The blade opening difference is obtained based on the endpoint values ​​of the blade opening range.

5. The method for evaluating the wear of the turbine guide vane bushing as described in claim 1, characterized in that, The step of obtaining the wear of the guide vane bushing and the blade bushing under any head and any number of operations using linear interpolation based on the characteristic head, the number of guide vane operations, the guide vane bushing wear correlation matrix, and the blade wear correlation matrix includes: Obtain the characteristic head interval where any head is located and the guide vane action number interval where any number of actions is located; The endpoint wear value is obtained based on the characteristic head range and the range of guide vane actuation frequency. Based on the end wear value and the interpolation formula of the linear interpolation method, the wear amount of the guide vane bushing and the wear amount of the propeller bushing under any head and any number of actions are obtained.

6. The method for evaluating the wear of the turbine guide vane bushing as described in claim 5, characterized in that, The interpolation formula is: ； ； ； in, This refers to the wear amount of the guide vane bushing or the blade bushing under any head and any number of actuations. as well as The wear amount corresponds to different numbers of actions. as well as For different water heads, For the current water head, The calculated wear amount of the guide vane bushing or impeller bushing is represented by O, where O is the characteristic head and j is the number of actuations. This refers to the amount of wear. The number of actions is arbitrary.

7. A system for assessing wear of guide vane bushings in hydraulic turbines, characterized in that, include: The setting module is used to set the contact interaction mode of the guide blade and its bushing on the simulation analysis model of the wear of the guide blade bushing of the water turbine. The guide blade includes the guide blade and the blade. A module is established to create a wear model of the turbine guide vane bushing, which includes a wear model of the turbine guide vane bushing and a wear model of the turbine blade bushing. The preset module is used to preset the number of guide vane movements; The first calculation module is used to take several characteristic heads between the maximum and minimum head of the turbine to obtain the normal operating power range corresponding to each characteristic head of the turbine guide vane under the preset number of guide vane actions. Based on the normal operating power range and the turbine operating characteristic curve, the module obtains the guide vane opening corresponding to the endpoint value of the normal operating power range under each characteristic head. Based on the guide vane opening corresponding to the endpoint value of the normal operating power range, the module calculates the guide vane opening difference. Based on the guide vane opening corresponding to the endpoint value of the normal operating power range and the turbine coherence curve, the module obtains the blade opening range by interpolation. Based on the blade opening range, the module obtains the blade opening difference. The second calculation module is used to calculate the guide vane angle corresponding to the guide vane opening based on the guide vane opening difference and the guide vane angle calculation formula. The third calculation module is used to calculate the blade angle corresponding to the blade opening using the blade opening difference and the blade angle calculation formula. The fourth calculation module is used to calculate the tangential slip distance of the guide vane and the tangential slip distance of the blade based on the guide vane angle and the blade angle, respectively. The fifth calculation module is used to calculate the guide vane water pressure and the blade water pressure acting on the blade based on the characteristic head. The sixth calculation module is used to obtain the guide vane bushing pressure and the blade bushing pressure based on the guide vane water pressure, the blade water pressure, and the bushing contact interaction mode. The seventh calculation module is used to obtain the wear amount of the guide vane bushing corresponding to the characteristic head based on the guide vane bushing pressure, the guide vane tangential sliding distance, and the turbine guide vane bushing wear model, or / and obtain the wear amount of the blade bushing corresponding to the characteristic head based on the blade bushing pressure, the blade tangential sliding distance, and the turbine blade bushing wear model. The correlation module is used to establish a correlation matrix for guide vane bushing wear and a correlation matrix for blade wear based on the wear amount of the blade bushing corresponding to the characteristic head, the wear amount of the guide vane bushing, and the number of guide vane movements. The evaluation module is used to obtain the wear amount of the guide vane bushing and the blade bushing under any head and any number of operations based on the characteristic head, the number of guide vane actions, the guide vane bushing wear correlation matrix, and the blade wear correlation matrix, using linear interpolation, and taking the wear amount of the guide vane bushing and / or the blade bushing as the evaluation result.

8. The turbine guide vane bushing wear assessment system as described in claim 7, characterized in that, The first computing module includes: The corresponding unit is used to obtain two endpoint values ​​of the normal operating power range according to the normal operating power range corresponding to each characteristic head, as the first endpoint value and the second endpoint value, wherein the first endpoint value is less than the second endpoint value; The matching unit is used to match the first endpoint value and the second endpoint value with the turbine operating characteristic curve to obtain the first guide vane opening corresponding to the first endpoint value and the second guide vane opening corresponding to the second endpoint value. The first calculation unit is used to calculate the difference between the second guide vane opening and the first guide vane opening to obtain the guide vane opening difference. The second calculation unit is used to obtain the first blade opening and the second blade opening by interpolation based on the second guide vane opening, the first guide vane opening, and the turbine coordination curve. The first blade opening and the second blade opening form the blade opening interval, and the first blade opening and the second blade opening serve as the endpoint values ​​of the blade opening interval.

9. A terminal device, comprising a memory and a processor, characterized in that, The memory stores a computer program that can run on a processor, and when the processor loads and executes the computer program, it employs the method described in any one of claims 1 to 6.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is loaded and executed by the processor, it employs the method described in any one of claims 1 to 6.

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