Method and device for adjusting assembly backlash of speed reducer of wind generating set

Abstract

The invention discloses a wind generating set speed reducer assembly backlash adjusting method and device, a speed reducer center positioning tool and a gear ring measuring tool are configured, the periphery of the speed reducer center positioning tool is provided with a circular flange, and the size of the circular flange is consistent with that of a mounting flange of a speed reducer; the speed reducer center positioning tool is mounted on a speed reducer mounting hole, the gear ring measuring tool is mounted at the bottom of the yaw gear ring, the gear ring measuring ball is in tangent contact with two tooth surfaces of a green tooth groove of the yaw gear ring, and the center distance between the center measuring ball of the speed reducer center positioning tool and the gear ring measuring ball is utilized to measure the yaw gear ring. The position of a mounting bolt hole meeting the backlash requirement is calculated according to the center distance, and the speed reducer is directly assembled according to the position of the bolt hole, so that repeated dismounting and debugging are avoided, the labor intensity of workers is reduced, the production and assembly efficiency is improved, and the production period is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wind power yaw, pitch reducer assembly, in particular to a wind turbine reducer assembly side clearance adjustment method and device. BACKGROUND

[0002] Currently, the installation flange and driving gear of the yaw and pitch reducer of the wind turbine are designed to be eccentric, and the installation and adjustment of the side clearance is usually performed by initially assembling the reducer to the installation hole, then measuring the side clearance of the maximum green tooth position of the driving gear of the reducer jumping the gear (ring gear or bearing gear), if the requirement is not met, the fastening bolt is removed, the reducer is lifted and rotated to adjust the installation position of the eccentric mark of the reducer, and then the bolt is tightened and the side clearance is measured. This process needs to repeatedly disassemble and assemble the bolt, use the crane, and the adjustment of the side clearance has high work intensity, long occupation time of the lifting equipment, low efficiency of the whole assembly, and high cost. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art, and provides a wind turbine reducer assembly side clearance adjustment method, which measures the center distance before the installation of the reducer, calculates the installation bolt hole position meeting the side clearance requirement according to the measurement data, directly assembles the reducer, avoids repeated disassembly and adjustment, reduces the labor intensity of workers, and improves the production assembly efficiency and shortens the production cycle.

[0004] Another object of the present application is to provide a wind turbine reducer assembly side clearance adjustment device.

[0005] The object of the present application is achieved by the following technical solutions:

[0006] A wind turbine reducer assembly side clearance adjustment method, which is configured with a reducer center positioning tool, a ring gear measuring tool and an inside diameter micrometer, and the method comprises the steps of

[0007] S1, confirming the vertical line according to the reducer distribution circle radius line mark reserved on the reducer installation hole of the yaw base of the wind turbine, confirming the reference bolt hole according to the vertical line, and arranging a plurality of mark bolt holes in the clockwise direction and the counterclockwise direction of the reference bolt hole in sequence;

[0008] S2, marking the bolt hole of the maximum eccentric position of the reducer center positioning tool as a target bolt hole;

[0009] S3, aligning the reducer distribution circle radius line mark reserved on the reducer installation hole of the yaw base with the radius line mark of the maximum green tooth position of the ring gear jumping of the yaw ring gear of the wind turbine;

[0010] S4, install the reducer center positioning tool to the reducer mounting hole of the yaw base, make the target bolt hole of the reducer center positioning tool concentric with the reference bolt hole of the yaw base, and fix it by screw; install the gear ring measuring tool at the bottom of the yaw gear ring, and make the gear ring measuring ball tangent to the tooth surface of the green tooth gear groove of the yaw gear ring;

[0011] S5, measure the distance S between the center measuring ball and the gear ring measuring ball of the reducer center positioning tool by using the inside diameter micrometer;

[0012] S6, calculate the variation Δa of the center distance when the target bolt hole is installed in the reference bolt hole and different marked bolt holes of the yaw base according to the maximum eccentricity of the driving gear center of the reducer relative to the mounting flange center of the reducer i ;

[0013] S7, calculate the distance S1 between the center points of the center measuring ball and the gear ring measuring ball according to the distance S between the center measuring ball and the gear ring measuring ball, calculate the actual center distance L S between the center measuring ball and the gear ring measuring ball according to the distance S1 between the center points, then calculate the center distance a" between the reducer center positioning tool and the yaw gear ring after installation according to the difference ΔL between the actual center distance L S and the theoretical center distance L C between the center measuring ball and the gear ring measuring ball, calculate the center distance a i between the target bolt hole and different hole positions according to the center distance a" and the variation Δa i of the center distance when the target bolt hole is installed in different hole positions, further calculate the gear side clearance when the target bolt hole is installed in different hole positions according to the center distance a i , select the required side clearance value and the corresponding installation position according to the preset gear side clearance range, and finally install the reducer according to the side clearance value and the corresponding installation position.

[0014] Further, in step S6, the variation Δa i of the center distance when the target bolt hole is installed in the reference bolt hole and different marked bolt holes of the yaw base is calculated according to the maximum eccentricity of the driving gear center of the reducer relative to the mounting flange center of the reducer

[0015] Δa i = ΔECC × sin(360 ÷ n × n i )

[0016] Wherein, ΔECC is the maximum eccentricity of the driving gear center relative to the mounting flange center of the reducer, n is the total number of yaw driving installation bolt holes, n i is the position of the yaw base installation bolt hole, n i = 1, which means the first marked bolt hole in the clockwise direction of the reference bolt hole, n i= -5 indicates the fifth marked bolt hole in the counterclockwise direction of the reference bolt hole.

[0017] Furthermore, in step S7, the following operations are performed:

[0018] S7.1 Calculate the standard gear center distance a0 based on the number of teeth on the yaw gear ring and the number of teeth on the drive gear.

[0019]

[0020] Where m is the gear module, the module of the drive gear is m1, the module of the yaw gear is m2, m = m1 = m2, z1 is the number of teeth of the drive gear, and z2 is the number of teeth of the yaw gear.

[0021] S7.2 Calculate the meshing angle α' between the drive gear and the yaw gear ring according to the backlash-free meshing equation.

[0022]

[0023] Where x1 is the displacement coefficient of the drive gear, x2 is the displacement coefficient of the yaw gear, α is the pressure angle of the drive gear and the yaw gear, invα is the involute equation, invα=tanα-α;

[0024] The meshing angle α' is calculated by successively increasing the preset angle and successively decreasing the preset angle once, until the difference between the left and right sides of the equation is less than the preset difference. At this time, the meshing angle α' is the meshing angle between the drive gear and the yaw gear ring.

[0025] Next, based on the standard gear center distance a0 and the meshing angle α' between the drive gear and the yaw gear ring, the theoretical center distance a' of the reducer mounting holes, i.e., the backlash-free meshing center distance, is calculated.

[0026]

[0027] S7.3 Calculate the pressure angle α of the circle containing the center of the measuring ball on the gear ring according to the pressure angle calculation equation. M ,

[0028]

[0029] Where, d p To measure the diameter of the ball in the gear ring;

[0030] Pressure angle α M The calculation is performed by sequentially increasing and decreasing the preset angle once, until the difference between the left and right sides of the pressure angle calculation equation is less than the preset difference, thus obtaining the final pressure angle α. M ;

[0031] Based on the pressure angle α M, the number of yaw gear teeth and the diameter of the gear measuring ball are calculated to obtain the across-bar distance M of the gear measuring ball at the green tooth, and when the number of yaw gear teeth is even, the across-bar distance M is calculated by using the even tooth formula, and when the number of yaw gear teeth is odd, the across-bar distance M is calculated by using the odd tooth formula,

[0032] Even tooth formula:

[0033] Odd tooth formula:

[0034] S7.4, the center radius r of the gear measuring ball is calculated according to the across-bar distance M C ,

[0035]

[0036] Further, the theoretical center distance L between the center measuring ball and the gear measuring ball is calculated according to the center radius r of the gear measuring ball C and the theoretical center distance a' of the reduction gear mounting hole C ,

[0037] L C = a' - r C ;

[0038] S7.5, the distance S1 between the center point of the center measuring ball and the center point of the gear measuring ball is calculated according to the distance S

[0039]

[0040] Wherein, φ1 is the diameter of the center measuring ball;

[0041] H3 is calculated according to H, H1 and H2,

[0042] H3 = H - H1 - H2

[0043] Wherein, H is the distance from the reduction gear mounting surface to the top of the yaw gear, H1 is the height of the center of the gear measuring ball from the reduction gear mounting surface, H2 is the height of the center of the gear measuring ball from the magnetic base surface of the gear measuring tooling, and H3 is the distance between the center of the gear measuring ball and the center of the center measuring ball of the reduction gear center positioning tooling in the vertical direction;

[0044] Further, the actual center distance L between the center measuring ball and the gear measuring ball is calculated according to the distance S1 and H3 S ,

[0045]

[0046] According to the actual center distance L S and the theoretical center distance L C between the center measuring ball and the gear measuring ball, the difference ΔL is calculated,

[0047] AL = L S - L C ;

[0048] S7.6, calculating the center distance a" of the reduction gear center positioning tool after installation and the yaw gear ring according to the difference value AL and the theoretical center distance a' of the reduction gear mounting hole,

[0049] a" = a' + AL;

[0050] S7.7, calculating the center distance a of the target bolt hole installation in different hole positions according to the center distance a" of the reduction gear center positioning tool after installation and the yaw gear ring and the change amount Da of the center distance when the target bolt hole is installed in different hole positions i , i

[0051] a i = a" + Da i

[0052] calculating the meshing angle a of the target bolt hole installation in different hole positions according to the center distance a of the target bolt hole installation in different hole positions i , i

[0053] a i ' = arccos(d b1 ' ÷ a i )

[0054] wherein d b1 ' is the base circle diameter of the yaw gear ring, d b1 ' = d1' × cos a, d1' is the pitch circle diameter of the yaw gear ring, calculating the pitch circle diameter of the yaw gear ring when the target bolt hole is installed in different hole positions according to the number of teeth of the yaw gear ring;

[0055] further calculating the side clearance j of the target bolt hole installation in different hole positions according to the meshing angle a of the target bolt hole installation in different hole positions i , n

[0056] j n = m(z1+z2) × cos a (inv a i ' - inv a) - 2m(x1+x2) sin a

[0057] summarizing the calculation results, selecting the side clearance value and the corresponding installation position that meet the requirements according to the preset gear side clearance range, and installing the reduction gear according to the side clearance value and the corresponding installation position.

[0058] ​​​Further, the center positioning tool of the speed reducer comprises a base plate, a circular flange, a center measuring ball and a fixing screw, the outer periphery of the base plate is provided with the circular flange which is consistent in size with the mounting flange of the speed reducer, the center measuring ball is installed on the base plate through the fixing screw, and the center of the center measuring ball has a deviation from the center of the base plate, the deviation value is consistent with the eccentricity between the center of the mounting flange of the speed reducer and the center of the driving gear, the flange side of the base plate is provided with a maximum eccentricity mark at the maximum eccentric position of the center of the center measuring ball relative to the center of the center measuring ball, and the target bolt hole is confirmed according to the maximum eccentricity mark.

[0059] Further, the base plate is provided with a tool stop on the base plate to facilitate installation, and the tool stop is matched with a reserved stop on the yaw base.

[0060] Further, the gear ring measuring tool comprises a magnetic base and a gear ring measuring ball arranged on the top of the magnetic base, the magnetic base is adsorbed on the yaw gear ring, and the gear ring measuring ball is arranged in the green gear tooth groove of the yaw gear ring and is in tangential contact with the two tooth surfaces of the green gear tooth groove.

[0061] Another object of the present application is achieved by the following technical scheme:

[0062] A speed reducer assembly side gap adjusting device for a wind turbine generator set is used to realize the wind turbine generator set speed reducer assembly side gap adjusting method, and comprises a speed reducer center positioning tool, a gear ring measuring tool, an inside diameter micrometer, a first calculation unit and a second calculation unit,

[0063] The speed reducer center positioning tool is installed on the speed reducer mounting hole, and the target bolt hole of the speed reducer center positioning tool is arranged concentrically with the reference bolt hole of the yaw base;

[0064] The gear ring measuring tool is installed at the bottom of the yaw gear ring, and the gear ring measuring ball is in tangential contact with the two tooth surfaces of the green gear tooth groove of the yaw gear ring;

[0065] The inside diameter micrometer is used to measure the distance S between the center measuring ball and the gear ring measuring ball;

[0066] The first calculation unit is used to calculate the variation amount Δa of the center distance when the target bolt hole is installed on the reference bolt hole and different mark bolt holes of the yaw base according to the maximum eccentricity between the center of the driving gear of the speed reducer and the center of the mounting flange of the speed reducer i ;

[0067] The second calculation unit is used to calculate the distance S1 between the two center points according to the distance S between the center measuring ball and the gear ring measuring ball, and calculate the actual center distance L between the center measuring ball and the gear ring measuring ball according to the distance S1 between the two center points S , and then calculate the actual center distance LS and the theoretical center distance L between the center measuring ball and the gear ring measuring ball C The difference ΔL between the center distance a of the center positioning tool after installation and the center distance a' of the drive gear i The center distance a of the target bolt hole after installation in different hole positions i The center distance a of the target bolt hole after installation in different hole positions i The gear side clearance when the target bolt hole is installed in different hole positions, and the required side clearance value and the corresponding installation position are selected according to the preset gear side clearance range, and finally the installation of the speed reducer is carried out according to the side clearance value and the corresponding installation position.

[0068] Further, the first calculation unit specifically performs the following operations,

[0069] The change amount Δa of the center distance when the target bolt hole is installed in the yaw base reference bolt hole and different mark bolt holes according to the maximum eccentricity of the center of the drive gear of the speed reducer relative to the center of the mounting flange of the speed reducer i ,

[0070] Δa i = ΔECC × sin(360 ÷ n × n i )

[0071] Where ΔECC is the maximum eccentricity of the center of the drive gear relative to the center of the mounting flange of the speed reducer, n is the total number of yaw drive installation bolt holes, n i is the position of the yaw base installation bolt hole, n i = 1, which means the first mark bolt hole clockwise from the reference bolt hole, n i = -5, which means the fifth mark bolt hole counterclockwise from the reference bolt hole.

[0072] Further, the second calculation unit specifically performs the following operations,

[0073] S7.1, calculate the standard gear center distance a0 according to the number of teeth of the yaw gear ring and the number of teeth of the drive gear,

[0074]

[0075] Where m is the gear modulus, the modulus of the drive gear is m1, the modulus of the yaw gear ring is m2, m = m1 = m2, z1 is the number of teeth of the drive gear, and z2 is the number of teeth of the yaw gear ring.

[0076] S7.2, calculate the meshing angle α' of the drive gear and the yaw gear ring according to the no-side-clearance meshing equation,

[0077]

[0078] Where x1 is the displacement coefficient of the drive gear, x2 is the displacement coefficient of the yaw gear, α is the pressure angle of the drive gear and the yaw gear, invα is the involute equation, invα=tanα-α;

[0079] The meshing angle α' is calculated by successively increasing the preset angle and successively decreasing the preset angle once, until the difference between the left and right sides of the equation is less than the preset difference. At this time, the meshing angle α' is the meshing angle between the drive gear and the yaw gear ring.

[0080] Next, based on the standard gear center distance a0 and the meshing angle α' between the drive gear and the yaw gear ring, the theoretical center distance a' of the reducer mounting holes, i.e., the backlash-free meshing center distance, is calculated.

[0081]

[0082] S7.3 Calculate the pressure angle α of the circle containing the center of the measuring ball on the gear ring according to the pressure angle calculation equation. M ,

[0083]

[0084] Where, d p To measure the diameter of the ball in the gear ring;

[0085] Pressure angle α M The calculation is performed by sequentially increasing and decreasing the preset angle once, until the difference between the left and right sides of the pressure angle calculation equation is less than the preset difference, thus obtaining the final pressure angle α. M ;

[0086] Based on the pressure angle α M The span distance M of the measuring ball at the green tooth is calculated using the number of teeth on the yaw gear ring and the diameter of the measuring ball on the gear ring. When the number of teeth on the yaw gear ring is even, the even-number formula is used to calculate the span distance M; otherwise, the odd-number formula is used.

[0087] Even-numbered tooth formula:

[0088] Odd number of teeth formula:

[0089] S7.4 Calculate the center radius r of the measuring ball of the gear ring based on the span distance M. C ,

[0090]

[0091] Then, the center radius r of the ball is measured based on the gear ring. C The theoretical center distance a' between the gearbox mounting holes and the theoretical center distance L between the center measuring ball and the gear ring measuring ball are calculated. C ,

[0092] L C =a'-r C ;

[0093] S7.5 Calculate the distance S1 between the center point of the center measuring ball and the center point of the gear ring measuring ball based on the distance S.

[0094]

[0095] Where φ1 is the diameter of the central measuring sphere;

[0096] Calculate H3 based on H, H1, and H2.

[0097] H3 = H - H1 - H2

[0098] Where H is the distance from the mounting surface of the reducer to the top of the yaw gear ring, H1 is the height of the center of the gear ring measuring ball from the mounting surface of the reducer, H2 is the height of the center of the gear ring measuring ball from the surface of the magnetic base of the gear ring measuring fixture, and H3 is the vertical distance between the center of the gear ring measuring ball and the center measuring ball of the reducer center positioning fixture.

[0099] Then, based on the spacings S1 and H3, the actual center distance L between the center measuring ball and the gear ring measuring ball is calculated. S ,

[0100]

[0101] Based on the actual center distance L S The theoretical center distance L between the center measuring ball and the gear ring measuring ball C Calculate the difference ΔL.

[0102] ΔL=L S -L C ;

[0103] S7.6. Calculate the center distance a” between the reducer center positioning fixture and the yaw gear ring after installation, based on the difference ΔL and the theoretical center distance a' of the reducer mounting holes.

[0104] a” = a' + ΔL;

[0105] S7.7, Based on the center distance 'a' between the reducer center positioning fixture and the yaw gear ring after installation, and the change in center distance Δa when the target bolt holes are installed at different positions. i Calculate the center distance 'a' of the target bolt holes installed at different hole positions. i ,

[0106] a i =a”+Δa i

[0107] Based on the center distance 'a' of the target bolt holes installed at different hole positions. i Calculate the engagement angle α of the target bolt hole installed in different hole positions. i ',

[0108] α i =arccos(d b1 '÷a i )

[0109] Where, d b1 ' is the base circle diameter of the yaw gear ring, d b1 '=d1'×cosα, where d1' is the pitch circle diameter of the yaw gear. Calculate the pitch circle diameter of the yaw gear when the target bolt hole is installed in different hole positions based on the number of teeth of the yaw gear;

[0110] Furthermore, based on the meshing angle α of the target bolt holes installed in different hole positions... i 'Calculate the side clearance j of the target bolt hole installed in different hole positions' n ,

[0111] j n =m(z1+z2)×cosα(invα) i '-invα)-2m(x1+x2)sinα

[0112] Summarize the calculation results, select the required backlash value and corresponding installation position according to the preset gear backlash range, and install the reducer according to the backlash value and corresponding installation position.

[0113] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0114] This invention utilizes a gear reducer center positioning fixture and a gear ring measuring fixture. The outer periphery of the gear reducer center positioning fixture has a circular flange, the size of which matches the mounting flange of the gear reducer. The gear reducer center positioning fixture is installed onto the gear reducer mounting hole. The two fixtures are used to measure the center distance before gear reducer installation. Based on the measurement data, the positions of the mounting bolt holes that meet the side clearance requirements are calculated, allowing direct assembly of the gear reducer. This avoids repeated disassembly and adjustment, reduces the labor intensity of workers, improves production assembly efficiency, and shortens the production cycle. Furthermore, the two fixtures have a simple structure and are lightweight, each weighing less than 4kg. No lifting equipment is required, and the operation can be completed by one person, saving resources and labor costs. Attached Figure Description

[0115] Figure 1 This is a schematic diagram of the installation of the reducer center positioning fixture and the gear ring measuring fixture in this invention.

[0116] Figure 2 for Figure 1 A-direction view.

[0117] Figure 3 is a sectional view of B in Figure 2

[0118] Figure 4 is a structural schematic view of a reducer center positioning tool in the present application.

[0119] Figure 5 is a sectional view of the reducer center positioning tool in the present application.

[0120] Figure 6 is a sectional view of B in Figure 5

[0121] Figure 7 is a structural schematic view of a gear ring measuring tool in the present application.

[0122] Figure 8 is a schematic view of a target bolt hole installation position in the present application.

[0123] Figure 9 is a schematic view of main measurement and calculation dimensions in the present application. DETAILED DESCRIPTION

[0124] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0125] Embodiment 1

[0126] As shown in Figures 1 to 9 , the present embodiment provides a wind turbine reducer assembly side gap adjustment method, which needs to be configured with a reducer center positioning tool 1, a gear ring measuring tool 2 and an inside diameter micrometer 4; the method comprises the steps of

[0127] S1, confirming a vertical line according to a reducer distribution circle radius line mark M1 reserved on a reducer mounting hole 301 of a yaw base 3 of the wind turbine, confirming a reference bolt hole according to the vertical line and a plurality of mark bolt holes arranged in a clockwise direction and an anticlockwise direction of the reference bolt hole in turn, the reference bolt hole being marked as a reference bolt hole B, and the remaining several being marked as mark bolt holes B-5, B-4, B-3, B-2, B-1, B+1, B+2, B+3, B+4 and B+5 respectively; ​​

[0128] S2, mark the bolt hole of the maximum eccentric position of the reducer 6 and the reducer center positioning tool 1 as the target bolt hole E;

[0129] S3, align the reducer distribution circle radius line mark M1 with the radius line mark M2 of the maximum green tooth 501 position of the tooth ring runout reserved on the yaw gear 5;

[0130] S4, install the reducer center positioning tool 1 to the reducer mounting hole 301, make the target bolt hole E of the reducer center positioning tool 1 concentric with the reference bolt hole B of the yaw base 3, and fix it with screws 7; install the tooth ring measuring tool 2 at the bottom of the yaw gear 5, and make the tooth ring measuring ball 201 tangent to the tooth surfaces of the two teeth of the green tooth 501 tooth groove of the yaw gear 5;

[0131] S5, measure the distance S between the center measuring ball 103 and the tooth ring measuring ball 201 of the reducer center positioning tool 1 by using the inside diameter micrometer 4, which is 150.135mm in this embodiment;

[0132] S6, calculate the center distance variation Δa when the target bolt hole is installed at the reference bolt hole and different marked bolt holes of the yaw base according to the maximum eccentricity of the driving gear center of the reducer relative to the center line of the mounting flange of the reducer i ,

[0133] Δa i = ΔECC × sin(360 ÷ n × n i )

[0134] Wherein, ΔECC is the maximum eccentricity of the driving gear center line 601 relative to the center line 3011 of the mounting flange of the reducer, ΔECC = 1.5mm in this embodiment, n is the total number of yaw driving mounting bolt holes, n = 20 in this embodiment, n i is the position of the yaw base mounting bolt hole, n i = 1, which means the first marked bolt hole clockwise from the reference bolt hole, n i = -5, which means the fifth marked bolt hole counterclockwise from the reference bolt hole.

[0135] When the target bolt hole E is installed at the reference bolt hole B and moved to B+1, B+2, B+3, B+4, B+5 bolt holes, the maximum eccentricity mark is closer and closer to the gear center, and the driving gear center of the reducer is farther and farther away from the gear center, that is, the center distance becomes larger, and similarly, when the target bolt hole E is installed at the reference bolt hole B and moved to B-1, B-2, B-3, B-4, B-5 bolt holes, the maximum eccentricity mark is farther and farther away from the gear center, and the driving gear center of the reducer is closer and closer to the gear center, that is, the center distance becomes smaller;

[0136] The number of bolt holes n = 20 in the embodiment, the included angle γ = 360° ÷ 20*n of each bolt hole with the reference bolt hole B i , combined with the above analysis of the center distance change, the center distance change amount Δa i = maximum eccentricity amount ΔECC × sin γ = ΔECC × sin (360 ÷ n × n i ), the center distance change amount at different positions is calculated and summarized as shown in Table 1:

[0137]

[0138]

[0139] Table 1 Center distance change amount at different positions

[0140] S7, calculate the distance S1 between the center points of the center measuring ball and the gear ring measuring ball according to the distance S between the two, and calculate the actual center distance L of the center measuring ball and the gear ring measuring ball according to the distance S1 between the two center points S , then calculate the center distance a” between the center positioning tool after installation and the yaw gear ring according to the difference ΔL between the actual center distance L S and the theoretical center distance L C of the center measuring ball and the gear ring measuring ball, calculate the center distance a of the target bolt hole installed at different hole positions according to the center distance a” and the center distance change amount Δa i of the target bolt hole installed at different hole positions i , and further calculate the gear side clearance when the target bolt hole is installed at different hole positions according to the center distance a i , select the required side clearance value and the corresponding installation position according to the preset gear side clearance range, and finally install the reduction machine according to the side clearance value and the corresponding installation position; the following operations are performed,

[0141] S7.1, calculate the standard gear center distance a0 according to the number of teeth of the yaw gear ring and the number of teeth of the drive gear,

[0142]

[0143] Wherein, m is the gear modulus, the modulus of the drive gear is m1, which is 16 in this embodiment, the modulus of the yaw gear ring is m2, which is 16 in this embodiment, m = m1 = m2, z1 is the number of teeth of the drive gear, which is 13 in this embodiment, z2 is the number of teeth of the yaw gear ring, which is 13 in this embodiment, according to the calculation result, a0 = 2104 mm in this embodiment;

[0144] S7.2, calculate the meshing angle α' of the drive gear and the yaw gear ring according to the no-side-clearance meshing equation,

[0145]

[0146] Wherein, x1 is the drive gear modification coefficient, x1 = +0.5, x2 is the yaw gear modification coefficient, x2 = +0.5, alpha is the pressure angle of the drive gear and the yaw gear, alpha = 20°, inv alpha is the involute equation, inv alpha = tan alpha - alpha;

[0147] The meshing angle alpha' is calculated once by increasing and decreasing the preset angle 0.00001° in turn, until the difference between the left and right sides of the equation is less than the preset difference 0.000001, at which time the meshing angle alpha' is the meshing angle of the drive gear and the yaw gear;

[0148] The meshing angle alpha' = 21.12644° is calculated by trial and iteration;

[0149] Then, the theoretical center distance a' of the reduction gear mounting hole, i.e., the backlash-free meshing center distance of the reduction gear and the yaw gear, is calculated according to the standard gear center distance a0 and the meshing angle alpha' of the drive gear and the yaw gear;

[0150]

[0151] The reduction gear mounting distribution circle radius is designed according to a';

[0152] S7.3, the pressure angle alpha of the circle in which the gear measuring ball center is located is calculated according to the pressure angle calculation equation M ,

[0153]

[0154] Wherein, d p is the diameter of the gear measuring ball;

[0155] The pressure angle alpha M is calculated once by increasing and decreasing the preset angle in turn, until the difference between the left and right sides of the pressure angle calculation equation is less than the preset difference, to obtain the final pressure angle alpha M In the embodiment, the pressure angle alpha M = 21.47256° is calculated by trial and iteration;

[0156] The across-bar distance M of the gear measuring ball at the green tooth is calculated according to the pressure angle alpha M , the number of yaw gear teeth, and the diameter of the gear measuring ball, and when the number of yaw gear teeth is even, the across-bar distance M is calculated using the even tooth formula, and vice versa;

[0157] Even tooth formula:

[0158] Odd tooth formula:

[0159] The number of teeth of the gear ring in this embodiment is even, and the span bar distance M = 4071.11328 is obtained by calculation;

[0160] S7.4, calculating the center radius r of the gear ring measuring ball according to the span bar distance M C ,

[0161]

[0162] Further, the theoretical center distance L between the center measuring ball and the gear ring measuring ball is calculated according to the center radius r of the gear ring measuring ball C and the theoretical center distance a' of the reduction gear mounting hole C ,

[0163] L C =a'-r C =100.01902

[0164] S7.5, calculating the distance S1 between the center point of the center measuring ball and the center point of the gear ring measuring ball according to the distance S, φ1=32mm, d p =32mm,

[0165]

[0166] Wherein, φ1 is the diameter of the center measuring ball;

[0167] H3 is calculated according to H, H1 and H2,

[0168] H3=H-H1-H2

[0169] Wherein, H is the distance from the reduction gear mounting surface to the top of the yaw gear ring, H=210.5mm, H1 is the height of the center of the gear ring measuring ball from the reduction gear mounting surface, H1=28mm, H2 is the height of the center of the gear ring measuring ball from the magnetic base surface of the gear ring measuring tool, and H3 is the distance between the center of the gear ring measuring ball and the center of the center measuring ball of the reduction gear center positioning tool in the vertical direction;

[0170] Further, the actual center distance L between the center measuring ball and the gear ring measuring ball is calculated according to the distance S1 and H3 S ,

[0171]

[0172] According to the actual center distance L S and the theoretical center distance L between the center measuring ball and the gear ring measuring ball C , the difference ΔL is calculated,

[0173] ΔL=L S -L C= -0.4353, indicating that the center distance is too small;

[0174] S7.6, calculating the center distance a" between the reducer center positioning tool after installation and the yaw gear ring according to the difference value AL and the theoretical center distance a' of the reducer mounting hole,

[0175] a" = a' + AL = 2119.1043;

[0176] S7.7, calculating the center distance a" between the reducer center positioning tool after installation and the yaw gear ring according to the center distance a" between the reducer center positioning tool after installation and the yaw gear ring and the change value Da of the center distance when the target bolt hole is installed in different hole positions i Calculate the center distance a of the target bolt hole installed in different hole positions i ,

[0177] a i = a" + Da i

[0178] According to the center distance a of the target bolt hole installed in different hole positions i Calculate the meshing angle a' of the target bolt hole installed in different hole positions i ',

[0179] a i ' = arccos(d b1 ' ÷ a i )

[0180] Where d b1 ' is the base circle diameter of the yaw gear ring, d b1 ' = d1' x cos a, d1' is the pitch circle diameter of the yaw gear ring, According to the number of teeth of the yaw gear ring, calculate the pitch circle diameter of the yaw gear ring when the target bolt hole is installed in different hole positions;

[0181] Further, according to the meshing angle a' of the target bolt hole installed in different hole positions i ' Calculate the side clearance j of the target bolt hole installed in different hole positions n ,

[0182] j n = m(z1+z2) x cos a(inv a i '-inv a) - 2m(x1+x2) sin a

[0183] The calculation results are summarized in Table 2 below. According to the preset gear side clearance range, select the side clearance value and the corresponding installation position that meets the requirements. In this embodiment, the preset gear side clearance range is 0.64-0.96mm. According to the side clearance value and the corresponding installation position, the reducer is installed.

[0184]

[0185]

[0186] Table 2 Summary of the calculation of the backlash

[0187] The center positioning tool 1 of the reduction gear includes a base plate 101, a circular flange 102, a center measuring ball 103 and a fixing screw 104, the outer periphery of the base plate 101 is provided with the circular flange 102 which is consistent with the size of the mounting flange of the reduction gear, the center measuring ball 103 is installed on the base plate 101 by the fixing screw 104, and the center line of the center measuring ball 103 has a deviation 107 from the center line of the base plate 101, the deviation value is consistent with the eccentric amount of the center of the mounting flange of the reduction gear and the center of the driving gear, the flange side of the maximum eccentricity mark 105 is provided on the base plate 101 at the maximum eccentric position of the center line 1011 of the base plate 101 relative to the center line 1031 of the center measuring ball 103, and the target bolt hole is confirmed according to the maximum eccentricity mark.

[0188] The tool stop 106 is provided on the base plate 101 for easy installation, and the tool stop cooperates with the reserved stop on the yaw base 3.

[0189] The gear ring measuring tool 2 includes a magnetic base 202 and a gear ring measuring ball 201 provided on the top of the magnetic base 202, the magnetic base 202 is adsorbed on the yaw gear ring 5, and the gear ring measuring ball 201 is provided in the tooth groove of the green tooth 501 of the yaw gear ring 5 and is in tangential contact with the two tooth surfaces of the tooth groove of the green tooth 501.

[0190] Example 2:

[0191] The embodiment provides a wind turbine generator set reduction gear assembly backlash adjusting device for realizing the wind turbine generator set reduction gear assembly backlash adjusting method in example 1, which comprises a reduction gear center positioning tool, a gear ring measuring tool, an inside diameter micrometer, a first calculation unit and a second calculation unit,

[0192] The reduction gear center positioning tool is installed on the reduction gear mounting hole, and the target bolt hole of the reduction gear center positioning tool is arranged concentrically with the reference bolt hole of the yaw base;

[0193] The gear ring measuring tool is installed at the bottom of the yaw gear ring, and the gear ring measuring ball is in tangential contact with the two tooth surfaces of the tooth groove of the green tooth of the yaw gear ring;

[0194] The inside diameter micrometer is used for measuring the distance S between the center measuring ball and the gear ring measuring ball;

[0195] The first calculation unit is used for calculating the change amount Da of the center distance when the target bolt hole is installed on the reference bolt hole of the yaw base and different mark bolt holes according to the maximum eccentric amount of the center of the driving gear of the reduction gear relative to the center of the mounting flange of the reduction gear.i ; specifically, the following operations are performed,

[0196] According to the maximum eccentricity of the drive gear center of the speed reducer relative to the center of the mounting flange of the speed reducer, the change amount Δa of the center distance when the target bolt hole is installed in the yaw base reference bolt hole and different marked bolt holes is calculated i ,

[0197] Δa i = ΔECC × sin(360 ÷ n × n i )

[0198] Wherein, ΔECC is the maximum eccentricity of the drive gear center relative to the center of the mounting flange of the speed reducer, n is the total number of yaw drive mounting bolt holes, n i is the position of the yaw base mounting bolt hole, n i = 1, that is, the first marked bolt hole in the clockwise direction of the reference bolt hole, n i = -5, that is, the fifth marked bolt hole in the counterclockwise direction of the reference bolt hole;

[0199] The second calculation unit is used to calculate the distance S1 between the center points of the center measuring ball and the gear ring measuring ball according to the distance S between the center measuring ball and the gear ring measuring ball, and to calculate the actual center distance L S of the center measuring ball and the gear ring measuring ball according to the distance S1 between the center points, and then to calculate the center distance a” of the speed reducer center positioning tool after installation and the yaw gear ring according to the difference ΔL between the actual center distance L S and the theoretical center distance L C of the center measuring ball and the gear ring measuring ball, to calculate the center distance a i of the target bolt hole installed in different hole positions according to the center distance a” and the change amount Δa of the center distance when the target bolt hole is installed in different hole positions i , and further to calculate the gear backlash when the target bolt hole is installed in different hole positions according to the center distance a i , to select the required backlash value and the corresponding installation position according to the preset gear backlash range, and finally to install the speed reducer according to the backlash value and the corresponding installation position; specifically, the following operations are performed,

[0200] S7.1, calculate the standard gear center distance a0 according to the number of teeth of the yaw gear ring and the number of teeth of the drive gear,

[0201]

[0202] Wherein, m is the gear modulus, the modulus of the drive gear is m1, the modulus of the yaw gear ring is m2, m = m1 = m2, z1 is the number of teeth of the drive gear, and z2 is the number of teeth of the yaw gear ring;

[0203] S7.2 Calculate the meshing angle α' between the drive gear and the yaw gear ring according to the backlash-free meshing equation.

[0204]

[0205] Where x1 is the displacement coefficient of the drive gear, x2 is the displacement coefficient of the yaw gear, α is the pressure angle of the drive gear and the yaw gear, invα is the involute equation, invα=tanα-α;

[0206] The meshing angle α' is calculated by successively increasing the preset angle and successively decreasing the preset angle once, until the difference between the left and right sides of the equation is less than the preset difference. At this time, the meshing angle α' is the meshing angle between the drive gear and the yaw gear ring.

[0207] Next, based on the standard gear center distance a0 and the meshing angle α' between the drive gear and the yaw gear ring, the theoretical center distance a' of the reducer mounting holes, i.e., the backlash-free meshing center distance, is calculated.

[0208]

[0209] S7.3 Calculate the pressure angle α of the circle containing the center of the measuring ball on the gear ring according to the pressure angle calculation equation. M ,

[0210]

[0211] Where, d p Measure the diameter of the ball for the gear ring;

[0212] Pressure angle α M The calculation is performed by sequentially increasing and decreasing the preset angle once, until the difference between the left and right sides of the pressure angle calculation equation is less than the preset difference, thus obtaining the final pressure angle α. M ;

[0213] Based on the pressure angle α M The span distance M of the measuring ball at the green tooth is calculated using the number of teeth on the yaw gear ring and the diameter of the measuring ball on the gear ring. When the number of teeth on the yaw gear ring is even, the even-number formula is used to calculate the span distance M; otherwise, the odd-number formula is used.

[0214] Even-numbered tooth formula:

[0215] Odd number of teeth formula:

[0216] S7.4 Calculate the center radius r of the measuring ball of the gear ring based on the span distance M. C ,

[0217]

[0218] Further, the center distance L between the center measuring ball and the gear ring measuring ball is calculated according to the center radius r of the gear ring measuring ball C and the theoretical center distance a' of the reducer mounting hole C ,

[0219] L C = a' - r C ;

[0220] S7.5, the center distance S1 between the center point of the center measuring ball and the center point of the gear ring measuring ball is calculated according to the center distance S,

[0221]

[0222] wherein φ1 is the diameter of the center measuring ball;

[0223] H3 is calculated according to H, H1 and H2,

[0224] H3 = H - H1 - H2

[0225] wherein H is the distance from the reducer mounting surface to the top of the yaw gear ring, H1 is the height from the center of the gear ring measuring ball to the reducer mounting surface, H2 is the height from the center of the gear ring measuring ball to the magnetic base surface of the gear ring measuring tool, and H3 is the vertical distance between the center of the gear ring measuring ball and the center of the center measuring ball of the reducer center positioning tool;

[0226] Further, the actual center distance L between the center measuring ball and the gear ring measuring ball is calculated according to the center distance S1 and H3 S ,

[0227]

[0228] According to the actual center distance L S and the theoretical center distance L C between the center measuring ball and the gear ring measuring ball,

[0229] ΔL = L S - L C ;

[0230] S7.6, the center distance a" between the reducer center positioning tool after installation and the yaw gear ring is calculated according to the difference ΔL and the theoretical center distance a' of the reducer mounting hole

[0231] a" = a' + ΔL;

[0232] S7.7, the center distance a of the target bolt hole installed in different hole positions is calculated according to the center distance a" between the reducer center positioning tool after installation and the yaw gear ring and the change amount Δa of the center distance when the target bolt hole is installed in different hole positions i , i ​

[0233] a i = a" + Δa i

[0234] According to the center distance a of the target bolt hole installed in different hole positions i Calculate the meshing angle a of the target bolt hole installed in different hole positions i

[0235] a i '= arccos (d b1 ' ÷ a i )

[0236] Wherein, d b1 ' is the base circle diameter of the yaw gear, d b1 ' = d1' × cos a, d1' is the pitch circle diameter of the yaw gear, According to the number of teeth of the yaw gear, the pitch circle diameter of the yaw gear when the target bolt hole is installed in different hole positions is calculated;

[0237] Further, according to the meshing angle a of the target bolt hole installed in different hole positions i ' Calculate the side clearance j of the target bolt hole installed in different hole positions n

[0238] j n = m (z1+z2) × cos a (inv a i '-inv a) -2m (x1+x2) sin a

[0239] Summarize the calculation results, select the side clearance value and the corresponding installation position according to the preset gear side clearance range, and install the speed reducer according to the side clearance value and the corresponding installation position.

[0240] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the scope disclosed by the present application, which belongs to the protection scope of the present application.​​

Claims

1. A wind turbine gearbox assembly lash adjustment method, characterized by, The method comprises the steps of, S1, confirming the vertical line according to the radius line mark of the reducer distribution circle reserved on the reducer mounting hole of the yaw base of the wind turbine generator set, confirming the reference bolt hole according to the vertical line, and sequentially arranging a plurality of mark bolt holes in the clockwise direction and the counterclockwise direction of the reference bolt hole; S2, marking the bolt hole of the maximum eccentric position of the reducer center positioning tool as a target bolt hole; S3, aligning the radius line mark of the reducer distribution circle reserved on the reducer mounting hole of the yaw base with the radius line mark of the maximum green tooth position of the gear ring runout reserved on the yaw gear ring of the wind turbine generator set; S4, mounting the reducer center positioning tool to the reducer mounting hole of the yaw base, arranging the target bolt hole of the reducer center positioning tool concentrically with the reference bolt hole of the yaw base, and fixing by screws; mounting the gear ring measuring tool at the bottom of the yaw gear ring, and making the gear ring measuring ball tangentially contact with the tooth surfaces of the green tooth gear groove of the yaw gear ring; S5, measuring the distance S between the center measuring ball of the reducer center positioning tool and the gear ring measuring ball by using the inside diameter micrometer; S6. Calculate the change in center distance Δa when the target bolt hole is installed on the reference bolt hole on the yaw base and when different marked bolt holes are used, based on the maximum eccentricity of the drive gear center of the reducer relative to the mounting flange center of the reducer. i ; S7, calculate the distance S1 between the two center points according to the distance S between the center measuring ball and the gear ring measuring ball, and calculate the actual center distance L between the center measuring ball and the gear ring measuring ball according to the distance S1 between the two center points S , then calculate the center distance a" between the center measuring ball and the yaw gear ring after the installation of the reduction machine center positioning tool according to the difference ΔL between the actual center distance L S and the theoretical center distance L C between the center measuring ball and the gear ring measuring ball, calculate the center distance a i of the target bolt hole installed in different hole positions according to the center distance a" and the change amount Δa i of the center distance of the target bolt hole installed in different hole positions, and further calculate the gear side clearance when the target bolt hole is installed in different hole positions according to the center distance a i , select the required side clearance value and the corresponding installation position according to the preset gear side clearance range, and finally install the reduction machine according to the side clearance value and the corresponding installation position.

2. The wind turbine gearbox assembly lash adjustment method of claim 1, wherein, In step S6, the variation amount Da of the center distance when the target bolt hole is installed in the yaw base reference bolt hole and the different mark bolt hole is calculated according to the maximum eccentric amount of the driving gear center of the speed reducer relative to the center of the mounting flange of the speed reducer i , Δa i = ΔECC x sin(360 ÷ n x n i ) Wherein, the maximum eccentricity of the center of the ECC driving gear relative to the center of the mounting flange of the speed reducer, n is the total number of yaw driving mounting bolt holes, n i is the position of the yaw base mounting bolt hole, n i = 1, that is, the first marked bolt hole in the clockwise direction of the reference bolt hole, n i = -5, that is, the fifth marked bolt hole in the counterclockwise direction of the reference bolt hole.

3. The wind turbine gearbox assembly lash adjustment method of claim 1, wherein, In step S7, the following operations are specifically performed, S7.1, calculating the standard gear center distance a0 according to the number of teeth of the yaw gear ring and the number of teeth of the driving gear, Wherein, m is the gear modulus, the modulus of the driving gear is m1, the modulus of the yaw gear ring is m2, m=m1=m2, z1 is the number of teeth of the driving gear, and z2 is the number of teeth of the yaw gear ring; S7.2, calculating the meshing angle α' of the driving gear and the yaw gear ring according to the no-backlash meshing equation, Wherein, x1 is the displacement coefficient of the driving gear, x2 is the displacement coefficient of the yaw gear ring, α is the pressure angle of the driving gear and the yaw gear ring, invα is the involute equation, and invα=tanα-α; Once, the meshing angle α' is increased and decreased by a preset angle respectively until the difference between the left and right sides of the equation is less than a preset difference, and the meshing angle α' at this time is the meshing angle of the driving gear and the yaw gear ring; Then, the theoretical center distance a' of the reducer mounting hole, i.e., the no-backlash meshing center distance, is calculated according to the standard gear center distance a0 and the meshing angle α' of the driving gear and the yaw gear ring; S7.

3. Calculate the pressure angle a of the circle in which the center of the gear ring measuring ball is located according to the pressure angle calculation equation M , wherein d p is the diameter of the gear ring measuring ball; The pressure angle a is calculated by the following equation: M The preset angle is sequentially increased and the preset angle is sequentially decreased to calculate once until the difference between the left and right sides of the pressure angle calculation equation is less than the preset difference value, and the final pressure angle a is obtained M ; According to the pressure angle α M The number of the yaw gear teeth and the measured ball diameter of the yaw gear are used to calculate the span bar distance M of the measured ball of the yaw gear at the green teeth. When the number of the yaw gear teeth is even, the even tooth formula is used to calculate the span bar distance M, otherwise the odd tooth formula is used to calculate the span bar distance M. Even-tooth formula: Odd tooth formula: S7.

4. Calculate the center radius r of the gear ring measuring ball according to the cross-bar distance M C , Further, the center distance L between the center measuring ball and the gear ring measuring ball is calculated according to the center radius r of the gear ring measuring ball C and the theoretical center distance a' of the reduction gear mounting hole C , L C = a' - r C ; S7.5, calculating the distance S1 between the center point of the center measuring ball and the center point of the gear ring measuring ball according to the distance S, Wherein, φ1 is the diameter of the center measuring ball; H3 is calculated according to H, H1 and H2, H3=H-H1-H2 Wherein, H is the distance from the reducer mounting surface to the top of the yaw gear ring, H1 is the height from the center of the gear ring measuring ball to the reducer mounting surface, H2 is the height from the center of the gear ring measuring ball to the magnetic base surface of the gear ring measuring tool, and H3 is the distance between the center of the gear ring measuring ball and the center of the center measuring ball of the reducer center positioning tool in the vertical direction; Further, the actual center distance L of the center measuring ball and the gear ring measuring ball is calculated according to the distance S1 and H3 S , According to the actual center distance L S and the theoretical center distance L of the center measuring ball and the gear ring measuring ball C Calculate the difference AL, ΔL = L S - L C ; S7.6, calculating the center distance a'' of the reducer center positioning tool and the yaw gear ring after installation according to the difference ΔL and the theoretical center distance a' of the reducer mounting hole, a''=a'+ΔL; S7.7, the center distance a" between the reducer center positioning tool after installation and the yaw gear ring, and the change amount Δa of the center distance when the target bolt hole is installed in different hole positions i Calculate the center distance a of the target bolt hole installed in different hole positions i , a i = a" + Δa i According to the center distance a of the target bolt hole installation in different hole positions i Calculate the engagement angle a of the target bolt hole installation in different hole positions i ', alpha i = arccos(d b1 / a i ) wherein d b1 is the base circle diameter of the yaw gear ring, d b1 is the base circle diameter of the yaw gear ring, d According to the number of teeth of the yaw gear ring, the pitch circle diameter of the yaw gear ring when the target bolt hole is installed at different hole positions is calculated. Further, the engagement angle a of the target bolt hole installed in different hole positions i The side clearance j of the target bolt hole installed in different hole positions n , j n = m(z1+z2) x cos a(inv a i - inv a) - 2m(x1+x2) sin a The calculation results are summarized, a required backlash value and a corresponding installation position are selected according to a preset gear backlash range, and the installation of the speed reducer is performed according to the backlash value and the corresponding installation position.

4. The wind turbine gearbox assembly lash adjustment method of claim 1, wherein, The center positioning tool of the speed reducer comprises a base plate, a circular flange, a center measuring ball and a fixing screw, the outer periphery of the base plate is provided with the circular flange, the circular flange is consistent in size with the mounting flange of the speed reducer, the center measuring ball is installed on the base plate through the fixing screw, and the center of the center measuring ball has a deviation from the center of the base plate, the deviation value of the center of the center measuring ball from the center of the base plate is consistent with the eccentricity of the center of the mounting flange of the speed reducer and the center of the driving gear, and the flange side edge of the base plate at the maximum eccentric position relative to the center of the center measuring ball is provided with a maximum eccentricity mark, and the target bolt hole is confirmed according to the maximum eccentricity mark.

5. The wind turbine gearbox assembly lash adjustment method of claim 4, wherein, A tool stop is arranged on the base plate to facilitate installation, and the tool stop is matched with a reserved stop on the yaw base.

6. The wind turbine gearbox assembly lash adjustment method of claim 1, wherein, The gear ring measuring tool comprises a magnetic base and a gear ring measuring ball arranged on the top of the magnetic base, the magnetic base is adsorbed on the yaw gear ring, and the gear ring measuring ball is arranged in the green tooth gear slot of the yaw gear ring and is tangent to the tooth surfaces of the green tooth gear slot.

7. A wind turbine gearbox assembly side play adjustment device, characterized by, The method for adjusting the assembly backlash of the speed reducer of the wind generating set according to any one of claims 1 to 6 comprises a center positioning tool of the speed reducer, a gear ring measuring tool, an inside diameter micrometer, a first calculation unit and a second calculation unit, The center positioning tool of the speed reducer is installed on the mounting hole of the speed reducer, and the target bolt hole of the center positioning tool of the speed reducer is arranged concentrically with the reference bolt hole of the yaw base; The gear ring measuring tool is installed at the bottom of the yaw gear ring, and the gear ring measuring ball is tangent to the two tooth surfaces of the green tooth gear slot of the yaw gear ring; The inside diameter micrometer is used to measure the distance S between the center measuring ball and the gear ring measuring ball; The first calculation unit is configured to calculate a variation amount Da of the center distance when the target bolt hole is installed in the reference bolt hole and the different mark bolt hole according to the maximum eccentricity of the center of the driving gear of the speed reducer relative to the center of the mounting flange of the speed reducer i ; The second calculation unit is used to calculate the distance S1 between the center points of the center measuring ball and the gear ring measuring ball based on the distance S between their center measuring balls, and to calculate the actual center distance L between the center measuring ball and the gear ring measuring ball based on the distance S1 between their center points. S Then, based on the actual center distance L S The theoretical center distance L between the center measuring ball and the gear ring measuring ball C The difference ΔL is calculated based on the center distance a” between the reducer center positioning fixture and the yaw gear ring after installation, according to the center distance a” and the change Δa of the center distance between the target bolt holes installed at different hole positions. i Calculate the center distance 'a' of the target bolt holes installed at different hole positions. i Furthermore, based on the center distance a i Calculate the gear backlash when the target bolt holes are installed in different positions. Select the required backlash value and corresponding installation position according to the preset gear backlash range. Finally, install the reducer according to the backlash value and corresponding installation position.

8. The wind turbine gearbox assembly lash adjustment device of claim 7, wherein, The first calculation unit specifically performs the following operations, According to the maximum eccentricity of the driving gear center of the speed reducer relative to the center of the mounting flange of the speed reducer, the variation amount Δa of the center distance when the target bolt hole is installed in the yaw base reference bolt hole and different mark bolt holes is calculated i , Δa i = ΔECC x sin(360 ÷ n x n i ) Wherein, the maximum eccentricity of the center of the ECC driving gear relative to the center of the mounting flange of the speed reducer, n is the total number of yaw driving mounting bolt holes, n i is the position of the yaw base mounting bolt hole, n i = 1, that is, the first marked bolt hole in the clockwise direction of the reference bolt hole, n i = -5, that is, the fifth marked bolt hole in the counterclockwise direction of the reference bolt hole.

9. The wind turbine generator set gearbox assembly lash adjustment device of claim 7, wherein, The second calculation unit specifically performs the following operations, S7.1, calculating the standard gear center distance a0 according to the number of teeth of the yaw gear ring and the number of teeth of the driving gear, wherein m is the gear modulus, the modulus of the driving gear is m1, the modulus of the yaw gear ring is m2, m=m1=m2, z1 is the number of teeth of the driving gear, and z2 is the number of teeth of the yaw gear ring; S7.2, calculating the meshing angle a' of the driving gear and the yaw gear ring according to the no-backlash meshing equation, wherein x1 is the displacement coefficient of the driving gear, x2 is the displacement coefficient of the yaw gear ring, a is the pressure angle of the driving gear and the yaw gear ring, inv a is the involute equation, and inv a=tan a-a; The meshing angle a' is calculated once by increasing and decreasing a preset angle in sequence until the difference between the left and right sides of the equation is less than a preset difference, and the meshing angle a' at this time is the meshing angle of the driving gear and the yaw gear ring; Then, the theoretical center distance a' of the mounting hole of the speed reducer, i.e., the no-backlash meshing center distance, is calculated according to the standard gear center distance a0 and the meshing angle a' of the driving gear and the yaw gear ring. S7.

3. Calculate the pressure angle a of the circle in which the center of the gear ring measuring ball is located according to the pressure angle calculation equation M , wherein d p is the diameter of the gear ring measuring ball; The pressure angle a is calculated by the following equation: M The preset angle is sequentially increased and the preset angle is sequentially decreased to calculate once until the difference between the left and right sides of the pressure angle calculation equation is less than the preset difference value, and the final pressure angle a is obtained M ; According to the pressure angle α M The number of the yaw gear teeth and the measured ball diameter of the yaw gear are used to calculate the span bar distance M of the measured ball of the yaw gear at the green teeth. When the number of the yaw gear teeth is even, the even tooth formula is used to calculate the span bar distance M, otherwise the odd tooth formula is used to calculate the span bar distance M. Even-tooth formula: Odd tooth formula: S7.

4. Calculate the center radius r of the gear ring measuring ball according to the cross-bar distance M C , Further, the center distance L between the center measuring ball and the gear ring measuring ball is calculated according to the center radius r of the gear ring measuring ball C and the theoretical center distance a' of the speed reducer mounting hole C , L C = a' - r C ; S7.5, calculating the distance S1 between the center point of the center measuring ball and the center point of the gear ring measuring ball according to the distance S, wherein φ1 is the diameter of the center measuring ball. According to H, H1 and H2, H3 is calculated, H3=H-H1-H2 Wherein, H is the distance from the reducer mounting surface to the top of the yaw gear ring, H1 is the height from the center of the gear ring measuring ball to the reducer mounting surface, H2 is the height from the center of the gear ring measuring ball to the magnetic base surface of the gear ring measuring tool, and H3 is the distance between the center of the gear ring measuring ball and the center of the reducer center positioning tool in the vertical direction. Further, the actual center distance L of the center measuring ball and the gear ring measuring ball is calculated according to the distance S1 and H3 S , According to the actual center distance L S and the theoretical center distance L of the center measuring ball and the gear ring measuring ball C Calculate the difference AL, ΔL = L S - L C ; S7.6, according to the difference ΔL and the theoretical center distance a' of the reducer mounting hole, the center distance a" of the reducer center positioning tool after installation and the yaw gear ring is calculated, a"=a'+ΔL; S7.7, the center distance a" between the reducer center positioning tool after installation and the yaw gear ring, and the change amount Δa of the center distance when the target bolt hole is installed in different hole positions i Calculate the center distance a of the target bolt hole installed in different hole positions i , a i = a" + Δa i According to the center distance a of the target bolt hole installation in different hole positions i Calculate the engagement angle a of the target bolt hole installation in different hole positions i , a i ' = arccos(d b1 ' ÷ a i ) wherein d b1 is the base circle diameter of the yaw gear ring, d b1 is the base circle diameter of the yaw gear ring, d According to the number of teeth of the yaw gear ring, the pitch circle diameter of the yaw gear ring when the target bolt hole is installed at different hole positions is calculated. Further, the engagement angle a of the target bolt hole installed in different hole positions i The side clearance j of the target bolt hole installed in different hole positions n , j n = m(z1+z2) x cos a(inv a i - inv a) - 2m(x1+x2) sin a The calculation results are summarized, the required backlash value and the corresponding installation position are selected according to the preset gear backlash range, and the reducer is installed according to the backlash value and the corresponding installation position.

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