阅读说明：本技术 一种水轮发电机轴镗孔定位方法及定位装置 (Boring positioning method and positioning device for shaft of water turbine generator ) 是由 吴瑞清 胡保涛 王建利 施代勇 贾栋林 陈忠敏 陈泰安 孟福强 李刚 张硕 李红 于 2021-07-20 设计创作，主要内容包括：本发明涉及水轮发电机轴镗孔定位方法及定位装置。水轮发电机轴镗孔定位方法首先通过调节镗孔机水平机箱水平,再通过固定螺钉、垫块及拉杆将镗孔机固定在待加工工件上,调心轴承套固镗杆,通过紧定螺钉调节调心轴承中心与工件孔中心重合。水轮发电机轴镗孔定位装置包括支撑板结构和调心轴承结构,所述支撑板结构顶部与调心轴承结构底部连接,支撑板结构顶部与镗孔机连接,支撑板底部与垫块连接,垫块再与拉杆连接,镗杆位于调心轴承机构的中心位置。本发明弥补了水轮发电机轴镗孔无法快速定位的空白,整个装置构造简单,适应性强,同时其定位调整精度可达0.01mm,镗孔精度质量高。(The invention relates to a method and a device for positioning a shaft boring hole of a water turbine generator. The method for positioning the shaft boring of the hydraulic generator comprises the steps of firstly adjusting the horizontal case of the boring machine to be horizontal, then fixing the boring machine on a workpiece to be processed through a fixing screw, a cushion block and a pull rod, fixing a boring rod on the self-aligning bearing sleeve, and adjusting the center of the self-aligning bearing to be superposed with the center of a workpiece hole through a fastening screw. The shaft boring positioning device for the hydraulic generator comprises a supporting plate structure and a self-aligning bearing structure, the top of the supporting plate structure is connected with the bottom of the self-aligning bearing structure, the top of the supporting plate structure is connected with a boring machine, the bottom of the supporting plate is connected with a cushion block, the cushion block is connected with a pull rod, and the boring rod is located at the center of the self-aligning bearing mechanism. The invention makes up the blank that the shaft boring of the water turbine generator cannot be positioned quickly, the whole device has simple structure and strong adaptability, and simultaneously the positioning and adjusting precision can reach 0.01mm, and the boring precision is high.)

1. A boring positioning method for a shaft of a water turbine generator comprises the following steps:

1) arranging a boring positioning device (1) of a water turbine generator shaft at the end of the connection part of the generator shaft (2) and the water turbine shaft (3);

2) measuring the distance between the boring bar (7) and the periphery of the hole wall by using a micrometer to determine the center of the boring bar;

3) erecting a dial indicator on the boring bar (7), and rotating the boring bar (7) to determine the perpendicularity of the boring bar (7) to a flange surface by taking the flange plane of the generator shaft (2) as a reference;

4) and in the center of the boring bar, after the verticality is determined, a positioning set screw (111) on the support plate structure (11) is twisted to finally fix and retest the center and the verticality of the boring bar.

2. A hydro-generator shaft boring positioning device for realizing the hydro-generator boring positioning method of claim 1, comprising: the device comprises a generator shaft (2), a water turbine shaft (3), a pull rod (4), a cushion block (5), a boring machine (6) and a boring rod (7), wherein the generator shaft (2) is connected with the water turbine shaft (3), and the device is characterized by further comprising a boring positioning device (1), wherein the boring positioning device (1) comprises a supporting plate structure (11) and a self-aligning bearing structure (12); the utility model discloses a boring bar, including bearing plate structure (11), backup pad structure (11) top and self-aligning bearing structure (12) bottom are with set screw (123) fastening connection, backup pad structure (11) top and for boring machine (6) set screw (123) pass the fixed screw hole of boring machine (113) fastening connection, backup pad structure (11) bottom and cushion (5) pass the fixed screw hole of cushion (114) fastening connection with set screw (123), cushion (5) pass through set screw (123) fastening connection with pull rod (4) again, central point that boring bar (7) are located self-aligning bearing mechanism (12) puts, and spherical bearing (121) and axle bed (122) in self-aligning bearing mechanism (12) are passed in boring bar (7).

3. A water turbine generator shaft boring positioning device as claimed in claim 2, wherein: the support plate structure (11) comprises: the device comprises a supporting plate (112) and positioning set screws (111), wherein a circular hole is formed in the center of the supporting plate (112), fixing screw holes are formed in the junction of the upper bottom edge and the lower bottom edge of the circular hole and the straight bottom edge of the circular hole, the positioning set screws (111) are arranged, and boring machine fixing screw holes (113) and cushion block fixing screw holes (114) are symmetrically distributed on two sides of the circular hole in the center of the supporting plate (112).

4. A water turbine generator shaft boring positioning device as claimed in claim 2, wherein: the self-aligning bearing structure (12) comprises a spherical bearing (121) and a shaft seat (122), the spherical bearing (121) and the shaft seat (122) are integrated, a circular hole is formed in the center of the spherical bearing and the shaft seat, and the circular hole is matched with the boring rod (7).

Technical Field

The invention belongs to the technical field of water conservancy and hydropower engineering, and particularly relates to a method for positioning a shaft boring hole of a water turbine generator.

The invention also relates to a hydraulic generator shaft boring positioning device for realizing the hydraulic generator shaft boring positioning method.

Background

The shaft line quality of the hydroelectric generating set in the hydropower station directly influences the safety and quality of the hydropower station in subsequent operation, so that the turning inspection and the shaft line adjustment are needed after the installation of the hydraulic generator is finished, and the hydraulic generator shaft and the generator shaft need to be readjusted in the process, so that the swing degree of the unit is reduced, and the operation safety of the unit is improved. After the water generator coupling is adjusted, the coupling needs to be bored, and a pin bolt is installed for positioning so as to ensure the coupling quality. However, due to the narrow space, the traditional boring equipment is difficult to arrange, the boring shaft is difficult to position, and the boring quality of the water generator coupling shaft is difficult to ensure.

Disclosure of Invention

Aiming at the prior art, the invention aims to provide a method and a device for boring a shaft of a hydraulic generator, which are simple, reliable, strong in adaptability, high in precision and high in working efficiency when the shaft of the hydraulic generator is bored.

In order to accurately position the boring hole, the boring hole positioning method for the shaft of the water turbine generator comprises the following steps of: firstly, arranging a boring positioning device of a water turbine generator shaft at the end of the shaft connection part of the generator shaft and the water turbine; then, measuring the distance between the boring bar and the periphery of the hole wall by using a micrometer to determine the center of the boring bar; erecting a dial indicator on the boring bar, and rotating the boring bar to determine the perpendicularity of the boring bar to a flange surface by taking the plane of a flange of the generator shaft as a reference; and finally fixing the center of the boring bar by twisting a positioning set screw on the support plate structure after the verticality is determined, and retesting the center of the boring bar and the verticality.

In order to accurately position the boring hole, the boring hole positioning device for the shaft of the water turbine generator comprises: generator shaft, water turbine shaft, pull rod, cushion, boring machine, boring bar, the generator shaft is connected with the water turbine shaft, still includes bore hole positioner, bore hole positioner includes: a supporting plate structure and a self-aligning bearing structure; the top of the supporting plate structure is tightly connected with the bottom of the self-aligning bearing structure through fixing screws, the top of the supporting plate structure and the bottom of the boring machine are tightly connected through fixing screws of a boring machine, the bottom of the supporting plate and the cushion block penetrate through fixing screws of the cushion block and are tightly connected, the cushion block is tightly connected with the pull rod through fixing screws, the boring rod is located at the center of the self-aligning bearing mechanism, and the boring rod penetrates through a spherical bearing and a shaft seat in the self-aligning bearing mechanism.

Further, the support plate structure includes: the device comprises a supporting plate and positioning set screws, wherein a circular hole is formed in the center of the supporting plate, fixing screw holes are formed in the junction of the upper bottom edge and the lower bottom edge of the circular hole and the straight bottom edge of the circular hole, the positioning set screws are arranged in the junction, and hole boring machine fixing screw holes and cushion block fixing screw holes are symmetrically distributed in the two sides of the circular hole in the center of the supporting plate.

Furthermore, the self-aligning bearing structure comprises a spherical bearing and a shaft seat, the spherical bearing and the shaft seat are integrated, a circular hole is formed in the center of the spherical bearing and the shaft seat, and the circular hole is matched with the boring rod.

The invention has the beneficial effects that:

four positioning set screws are uniformly distributed in the middle of the supporting plate structure in four directions and are used for fine adjustment of the self-aligning bearing structure, and compared with the traditional method, the positioning precision is improved; the upper part of the centering shaft process is tightly sleeved with the boring rod of the boring machine, the boring rod is prevented from swinging, the precision in working is improved, and the lower part of the centering bearing is fixed with the supporting plate, so that the stability of the whole boring equipment in working is ensured; when the boring equipment is installed, the center of the boring rod of the boring machine is roughly fixed through the supporting plate, and the boring machine is fixed on a workpiece through the fixing screw and the cushion block, so that the boring equipment is quick, simple and convenient in mode and firm in fixation.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a shaft boring positioning device of a water turbine generator.

Fig. 2 is a schematic structural diagram of a support plate structure of a boring positioning device for a shaft of a water turbine generator.

Fig. 3 is a schematic structural view of a self-aligning bearing structure of a shaft boring positioning device of a water turbine generator.

Fig. 4 is a schematic view of the working state of the boring positioning device for the shaft of the water turbine generator.

In the figure: the method comprises the following steps of 1, boring positioning device, 2, a generator shaft, 3, a water turbine shaft, 4, a pull rod, 5, a cushion block, 6, a boring machine, 7, a boring rod, 11, a support plate structure, 12, a self-aligning bearing structure, 111, a positioning set screw, 112, a support plate, 113, a boring machine fixing screw hole, 114, a cushion block fixing screw hole, 121, a spherical bearing, 122, a shaft seat and 123, wherein the boring positioning device is arranged on the support plate.

Detailed Description

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The method for positioning the shaft boring of the hydro-generator comprises the steps of adjusting the mounting verticality of a boring machine 6, measuring the distance between a boring rod 7 and the periphery of a hole wall by using a micrometer to determine the center of the boring rod, and finally fixing and retesting the center and the verticality of the boring rod by twisting a positioning set screw 111 on a supporting plate structure 11 after the center and the verticality of the boring rod are calibrated to be qualified. Specifically, the boring positioning method for the shaft of the water turbine generator comprises the following steps:

(1) arranging a boring positioning device 1 of a water turbine generator shaft at the end of the connection part of a generator shaft 2 and a water turbine shaft 3;

(2) measuring the distance between the boring bar 7 and the periphery of the hole wall by using a micrometer to determine the center of the boring bar;

(3) erecting a dial indicator on the boring bar 7, and rotating the boring bar 7 to determine the perpendicularity of the boring bar 7 to a flange surface by taking the flange plane of the generator shaft 2 as a reference;

(4) and after the perpendicularity of the center of the boring bar is determined, the positioning set screw 111 on the support plate structure 11 is twisted to carry out final fixing and retest on the center of the boring bar and the perpendicularity.

The hole boring positioning device for the water turbine generator shaft for realizing the hole boring positioning method of the water turbine generator shaft is shown in figures 1-4, and comprises a generator shaft 2, a water turbine shaft 3, a pull rod 4, a cushion block 5, a hole boring machine 6 and a boring rod 7, wherein the generator shaft 2 is connected with the water turbine shaft 3; further comprising: a support plate structure 11 and a self-aligning bearing structure 12; the utility model discloses a boring bar, including backup pad 11, bearing structure 12, backup pad 11, bearing structure 11, boring machine, cushion 5, bearing structure 11, boring machine, bearing structure 12, backup pad 11, bearing structure 7, boring bar 7, spherical bearing 121 and axle bed 122 in the bearing structure 12 are fixed screw 123 fastening connection for the bottom, backup pad 11 top and boring machine 6 pass 113 fastening connections of boring machine fixed screw holes with set screw 123, backup pad 11 bottom and cushion 5 pass 114 fastening connections with set screw 123, cushion 5 again passes through set screw 123 fastening connection with pull rod 4, boring bar 7 is located the central point of bearing structure 12 and puts, and boring bar 7 passes spherical bearing 121 and axle bed 122 in the bearing structure 12.

The support plate structure 11 includes: the device comprises a supporting plate 112 and a positioning and fastening screw 111, wherein a circular hole is formed in the center of the supporting plate 112, a fixing screw hole is formed in the junction of the upper bottom edge and the lower bottom edge of the circular hole and the straight bottom edge of the circular hole, the positioning and fastening screw 111 is arranged, and a boring machine fixing screw hole 113 and a cushion block fixing screw hole 114 are symmetrically distributed on two sides of the circular hole in the center of the supporting plate 112.

The self-aligning bearing structure 12 comprises a spherical bearing 121 and a shaft seat 122, the spherical bearing 121 and the shaft seat 122 are integrated, a circular hole is formed in the center of the spherical bearing 121 and the shaft seat 122, and the circular hole is matched with the boring bar 7.

Before the boring positioning device is used, the boring machine 6 is fixed on the supporting plate structure 11 through the fixing screw 123, the mounting verticality of the boring machine 6 is adjusted, and then the whole boring positioning device 1 for the water turbine generator shaft is fixed at the end of the connection position of the generator shaft 2 and the water turbine shaft 3 through the fixing screw 123, the cushion block 5 and the pull rod 4.

When the boring positioning device is used, the center of the bearing of the shaft adjusting stroke 12 structure is coincided with the center of a hole of a workpiece (the generator shaft 2 and the water turbine shaft 3 are connected into a whole) by adjusting the positioning set screw 111, so that the center of the boring rod 7 is coincided with the center of the hole of the workpiece, and boring positioning is completed.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made thereto within the knowledge of those skilled in the art.