Method for constructing a hydraulic turbine installation

Abstract

The application provides a water turbine equipment construction method, comprising the following steps: S1, hoisting the water guide bearing and its auxiliary equipment into the foundation pit before hoisting the main shaft; S2, fixing and installing the main shaft support structure on the water guide bearing support; S3, carrying out the turning of the main shaft to determine the axis of the unit; S4, hoisting the cone cylinder and the cylinder, and fixing and connecting the main shaft with the cone cylinder; S5, hoisting and fixing and installing the nozzle and the water distribution ring; S6, fixing and connecting the runner with the cone cylinder and the cylinder, and then carrying out the turning of the runner, and after the turning is completed, the installation of the auxiliary equipment is carried out. The assembling mode of hoisting parts is adopted, the cone cylinder, the cylinder and the runner and other parts are installed on the main shaft after the hoisting of the main shaft, the installation and hoisting operation are carried out in the water turbine chamber, the hoisting weight is greatly reduced, the construction difficulty is greatly reduced, the operation is more convenient, the hoisting space of the water turbine chamber is reduced, the structural stability of the water turbine is enhanced, and the use safety of the hydropower station is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water turbine equipment installation, in particular to a water turbine equipment construction method. BACKGROUND

[0002] The installation of the water turbine equipment is composed of a runner, a main shaft, a water guide bearing, a nozzle and accessories. The runner is a bucket type runner, weighing about 40t, and there are 6 nozzles, each weighing about 10t.

[0003] The existing publication CN109484974B discloses an installation method of an axial flow propeller water turbine, which discloses a water turbine installation process of a "three-body lifting" mode of a runner, a support cover and a main shaft. The method uses a machine room bridge crane to hang a lifting shaft on the water turbine main shaft, and then lifts the runner, the water turbine main shaft and the support cover as a whole to the machine unit pit. Since the weight of each component of the water turbine is relatively heavy, the overall main shaft lifting construction is difficult, the technical requirements are high, the lifting operation is not convenient, and the lifting space required for lifting the columnar main shaft with thin upper part and thick lower part is larger. The structure stability is reduced, and especially for large structures such as hydropower stations, the determination of the machine unit axis is more troublesome. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application provides a water turbine equipment construction method, which solves the problems of large overall main shaft lifting construction difficulty, high technical requirements, poor lifting operation convenience, large lifting space required for lifting the columnar main shaft with thin upper part and thick lower part, and more troublesome determination of the machine unit axis in the prior art.

[0005] According to one technical scheme of the present application, the water turbine equipment construction method comprises the following steps:

[0006] S1, before lifting the main shaft, the water guide bearing and its accessory equipment are lifted into the pit, the water guide bearing is installed and its level and center are preliminarily adjusted, the water guide bearing bush is pre-installed, the turning is carried out, and after the turning is completed, the water guide bearing center and level are finally adjusted, all the water guide bearing bushes are installed, and the gap is adjusted;

[0007] S2, the main shaft support structure is fixedly installed on the water guide bearing support, which is used for guiding and limiting the main shaft;

[0008] S3, the main shaft is turned to determine the machine unit axis;

[0009] S4, the cone cylinder is lifted into the water turbine chamber from the lifting hole, the cone cylinder is placed on the lifting trolley and pulled under the main shaft, the cone cylinder is lifted, the cylinder is lifted into the water turbine chamber from the lifting hole, the cylinder is placed on the lifting trolley and transported to the lower part of the cone cylinder, the cone cylinder and the cylinder are combined together, the main shaft and the cone cylinder are fixedly connected;

[0010] S5, the nozzle is hoisted into the hole, the nozzle is supported and installed on the lifting trolley, the nozzle is dragged to the lower side of the water distribution ring pipe by the lifting trolley, the nozzle is hoisted and fixedly installed with the water distribution ring pipe;

[0011] S6, the runner is hoisted to the water turbine layer by the runner turning tool, and is turned to a horizontal position, the runner is placed on the lifting trolley and is dragged to the lower side of the main shaft, the runner is hoisted, the runner is fixedly connected with the cone cylinder and the cylinder, and then the runner is turned, after the turning is completed, the auxiliary equipment is installed.

[0012] Further, in S2, the main shaft support structure comprises three support frames and a support ring plate, the three support frames are distributed in three equal parts with the main shaft as the center, and the support frames are arranged upwardly and obliquely, two of the three support frames are fixedly installed on the water guide bearing support, the main shaft is hoisted, the main shaft is suspended above the support frames, the third support frame is installed, the support ring plate matched with the main shaft is fixedly installed on the three support frames, the support ring plate is adjusted to be horizontal and coaxial with the main shaft, and then the main shaft is placed on the water guide bearing, and the elevation, center and levelness of the main shaft are adjusted.

[0013] Further, in S3, manual turning is adopted for turning, initial readings of all dial gauges are set, the rotor is rotated to the positions of the measuring points, readings of the dial gauges are recorded, swing data and zero return data of the measuring points are measured in sequence, the water turbine main shaft is adjusted to the center position of the unit with the water guide bearing support as the reference, and finally the main shaft is taken as the reference datum for turning.

[0014] Further, in S4, the cone cylinder is hoisted by a hand-operated hoist, and is suspended at a position about 1.7 meters from the ground, so that the safety and stability of the cone cylinder are ensured.

[0015] Further, in S5, before the nozzle is installed, a special calibration device is installed on the main shaft flange, the machining amount of the adjusting flange of each nozzle is measured and calculated, the adjusting flange is machined, and the nozzle is fixedly connected with the water distribution ring pipe flange by the adjusting flange.

[0016] Further, in S6, after the runner is turned, the runner is disassembled, and is reassembled after the nozzle is installed.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The present application adopts an assembly mode of hoisting and assembling parts, the cone cylinder, the cylinder and the runner are installed on the main shaft after the main shaft is hoisted, the installation and hoisting operations are all carried out in the water turbine chamber, the hoisting weight is greatly reduced, the construction difficulty is greatly reduced, the operation is more convenient, the hoisting space of the water turbine chamber is reduced, the structural stability of the water turbine is enhanced, and the use safety of the hydropower station is ensured.

[0019] 2、The application calibrates the unit axis of the main shaft through the water guide bearing, and then adjusts the installation position of each component based on the main shaft axis, so as to ensure the accuracy of the whole water turbine axis, reduce errors, ensure the normal operation of the unit, and make the use more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0020] The application will be further described below in combination with the drawings and embodiments:

[0021] Figure 1 It is a schematic diagram of the main shaft support structure of the embodiment of the application;

[0022] Figure 2 It is a schematic diagram of the assembly cut structure of the main shaft of the embodiment of the application.

[0023] In the above drawings, the main shaft 1, the water guide bearing 2, the support frame 3, the support ring plate 4, the cone cylinder 5, the cylinder 6, the water distribution ring pipe 7, the lifting trolley 8, and the water turbine chamber 9. DETAILED DESCRIPTION

[0024] The technical solutions in the application will be further described below in combination with the drawings and embodiments.

[0025] In order for the personnel in the technical field to better understand the technical solutions in the application, the technical solutions in the embodiments of the application will be clearly and completely described below in combination with the drawings of the embodiments of the application.

[0026] The embodiment of the application proposes a water turbine equipment construction method, as shown in the figure, which comprises the following steps: Figures 1-2

[0027] S1, before lifting the main shaft 1, the water guide bearing 2 and its auxiliary equipment are lifted into the foundation pit, the water guide bearing 2 is installed and its level and center are preliminarily adjusted, the water guide bearing bush is pre-installed, the turning is carried out, after the turning is completed, the center and level of the water guide bearing 2 are finally adjusted, all the water guide bearing bushes are installed, and the gap is adjusted;

[0028] S2, the main shaft 1 support structure is fixedly installed on the water guide bearing 2 support, which is used for guiding and limiting the main shaft 1;

[0029] S3, the main shaft 1 is turned to determine the unit axis;

[0030] S4, the cone cylinder 5 is lifted into the water turbine chamber 9 from the lifting hole, the cone cylinder 5 is placed on the lifting trolley 8 and pulled below the main shaft 1, then the cone cylinder 5 is lifted, the cylinder 6 is lifted into the water turbine chamber 9 from the lifting hole, the cylinder 6 is placed on the lifting trolley 8 and transported below the cone cylinder 5, the cone cylinder 5 is lowered, the cone cylinder 5 and the cylinder 6 are combined together, the main shaft 1 and the cone cylinder 5 are fixedly connected, and the lifting trolley 8 can move horizontally and is also provided with a lifting ring to lift the main shaft 1;

[0031] ​S5. Lift the nozzle through the lifting hole, support the nozzle on the lifting trolley 8, use the lifting trolley 8 to drag the nozzle to the bottom of the water distribution ring pipe 7, lift the nozzle and fix it to the water distribution ring pipe 7.

[0032] S6. Use a turbine turner tool to hoist the turbine runner to the turbine room 9 and turn it to a horizontal position. Place the runner on the hoisting trolley 8 and drag it below the main shaft 1. Hoist the runner and fix it to the cone 5 and cylinder 6. Then rotate the runner. After the rotation is completed, install the auxiliary equipment.

[0033] The assembly method employs component-by-component hoisting. After hoisting the main shaft 1, components such as the cone 5, cylinder 6, and impeller are installed on the main shaft 1. Both installation and hoisting operations are carried out inside the turbine room 9, significantly reducing the hoisting weight, greatly simplifying construction, and making operation more convenient. The reduced hoisting space in the turbine room 9 enhances the structural stability of the turbine and ensures the safety of the hydropower station. The turbine axis of the main shaft 1 is calibrated by the water guide bearing 2, and the installation position of each component is adjusted based on the axis of the main shaft 1, thereby ensuring the accuracy of the entire turbine axis, reducing errors, ensuring the normal operation of the unit, and making it more convenient to use.

[0034] like Figure 1 As shown in Figure S2, the main shaft 1 support structure includes three support frames 3 and a support ring plate 4. The three support frames 3 are distributed in three equal parts around the main shaft 1, and are inclined upwards. Two of the three support frames 3 are first fixedly installed on the water guide bearing 2 bracket. The main shaft 1 is then hoisted in, suspending the main shaft 1 above the support frames 3. The third support frame 3 is then installed, and the support ring plate 4, which cooperates with the main shaft 1, is fixedly installed on the three support frames 3. After adjusting the support ring plate 4 to be horizontal and coaxial with the main shaft 1, the main shaft 1 is placed on the water guide bearing 2, and the elevation, center, and level of the main shaft 1 are adjusted. The three support frames 3 provide stable positioning and support for the main shaft 1, preventing it from tilting and facilitating the rotation of the main shaft 1 to determine its unit axis.

[0035] In S3, manual turning is used. All dial gauges are set to initial readings, the rotor is rotated to each measuring point, and the dial gauge readings are recorded. The runout and zeroing data at each measuring point are measured sequentially. Using the water guide bearing 2 bracket as a reference, the turbine main shaft 1 is adjusted to the center position of the unit. Finally, the main shaft 1 is used as the reference for turning. This improves the accuracy of determining the unit's axis and facilitates the installation of other components.

[0036] like Figure 2 As shown, in step S4, a hand-operated hoist is used to lift the cone 5, suspending it approximately 1.7 meters above the ground to ensure its safety and stability. This facilitates the subsequent installation of the cylinder 6, and the use of a lifting trolley 8 to transport various components, reducing the risks of hoisting and improving safety.

[0037] In S5, before installing the nozzles, a special calibration device is installed on the main shaft 1 flange, the machining amount of each nozzle adjustment flange is measured and calculated, the adjustment flange is post-processed, and the nozzle is fixedly connected with the distribution ring pipe 7 flange by the adjustment flange. The nozzle angle and direction are adjusted by taking the main shaft 1 as a reference, the nozzle and the runner are more reasonably matched, and the design requirements are met.

[0038] In S6, after the runner is disassembled and installed, the runner is reassembled and the coupling bolts are tightened. The runner is first installed on the main shaft 1 and is rotated to determine the final installation position of the runner, the runner is then disassembled, the nozzles are installed according to the design requirements, the nozzles are provided with a larger operation space for installation, the positions of the nozzles and the runner are calibrated, the nozzles and the runner are more reasonably matched, and the rotation of the main shaft 1 is ensured.

[0039] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A method of constructing a hydraulic turbine installation, characterized in that The method comprises the following steps: S1, before lifting the main shaft, the water guide bearing and its auxiliary equipment are lifted into the foundation pit, the water guide bearing is installed and its level and center are preliminarily adjusted, the water guide bearing bush is pre-installed, the turning is carried out, after the turning is completed, the center and level of the water guide bearing are finally adjusted, all the water guide bearing bushes are installed, and the gap is adjusted; S2, the main shaft support structure is fixedly installed on the water guide bearing support, and is used for guiding and limiting the main shaft; S3, the main shaft is turned, and the unit axis is determined; S4, the cone cylinder is lifted into the water turbine chamber through the lifting hole, the cone cylinder is placed on the lifting trolley and pulled below the main shaft, the cone cylinder is lifted, the cylinder is lifted into the water turbine chamber through the lifting hole, the cylinder is placed on the lifting trolley and transported below the cone cylinder, the cone cylinder and the cylinder are combined together, the main shaft and the cone cylinder are fixedly connected; S5, the nozzle is lifted into the water turbine chamber through the lifting hole, the nozzle is supported and installed on the lifting trolley, the nozzle is pulled below the water distribution ring pipe by the lifting trolley, the nozzle and the water distribution ring pipe are fixedly installed; S6, the runner is lifted to the water turbine layer by the runner turning tool, and the runner is turned to the horizontal position, the runner is placed on the lifting trolley, the runner is pulled below the main shaft, the runner is lifted, the runner, the cone cylinder and the cylinder are fixedly connected, then the runner is turned, after the turning is completed, the auxiliary equipment is installed.

2. The method of constructing a hydraulic turbine apparatus according to claim 1, wherein In S2, the main shaft support structure comprises three support frames and a support ring plate, the three support frames are equally divided around the main shaft, and the support frames are arranged upwardly and obliquely; two of the three support frames are fixedly installed on the water guide bearing support, the main shaft is hung above the support frames, the third support frame is installed, the support ring plate matched with the main shaft is fixedly installed on the three support frames, the support ring plate is adjusted to be horizontal and coaxial with the main shaft, then the main shaft is placed on the water guide bearing, and the elevation, center and level of the main shaft are adjusted.

3. The method of constructing a hydraulic turbine apparatus according to claim 1, wherein In S3, manual turning is adopted, initial readings of all the dial gauges are set, the rotor is rotated to the positions of the measuring points, readings of the dial gauges are recorded, swing data and zero return data of the measuring points are measured in sequence, the water turbine main shaft is adjusted to the center position of the unit with the water guide bearing support as a reference, and finally the main shaft is taken as a turning reference datum.

4. The method of constructing a hydraulic turbine apparatus according to claim 1, wherein In S4, the cone cylinder is lifted by the chain hoist, and is hung at a position about 1.7 meters from the ground, so that the safety and stability of the cone cylinder are ensured.

5. The method of constructing a hydraulic turbine apparatus according to claim 1, wherein In S5, before the nozzle is installed, a special calibration device is installed on the flange of the main shaft, the machining amount of the adjusting flange of each nozzle is measured and calculated, the adjusting flange is machined, and the nozzle and the water distribution ring pipe flange are fixedly connected by the adjusting flange.

6. The method of constructing a hydraulic turbine apparatus according to claim 1, wherein In S6, after the runner is turned, the runner is disassembled, and is reassembled after the nozzle is installed.

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