阅读说明：本技术 大型水轮发电机组测速探头可调节固定装置 (Adjustable fixing device for speed measuring probe of large hydroelectric generating set ) 是由 高菘 付恩狄 杨虎 姚明亮 张龙浩 张勇 梁宇柔 彭伟军 王毅 黄果芳 于 2019-11-19 设计创作，主要内容包括：本发明公开了一种大型水轮发电机组测速探头可调节固定装置,包括底座和四个安装支架；所述底座呈L形,其包括第一水平板和第一竖直板；所述第一水平板远离第一竖直板的一侧为圆弧面,并在第一水平板远离第一竖直板一侧的边缘上均匀开设有四对螺纹孔；所述第一竖直板的下边缘上开设有若干螺丝孔；所述安装支架呈L形,其包括第二水平板和第二竖直板；所述第二水平板上开设有两个腰型孔；所述第二竖直板上开设有测速探头安装孔；所述安装支架通过两个腰型孔、一对螺纹孔用螺丝固定在一起。本发明具有固定牢靠,安装便捷、快速、可调节等优点,确保了机组控制核心信号的可靠稳定。(The invention discloses an adjustable fixing device for a speed measuring probe of a large hydroelectric generating set, which comprises a base and four mounting brackets, wherein the base is provided with a plurality of mounting brackets; the base is L-shaped and comprises a first horizontal plate and a first vertical plate; one side of the first horizontal plate, which is far away from the first vertical plate, is an arc surface, and four pairs of threaded holes are uniformly formed in the edge of one side of the first horizontal plate, which is far away from the first vertical plate; a plurality of screw holes are formed in the lower edge of the first vertical plate; the mounting bracket is L-shaped and comprises a second horizontal plate and a second vertical plate; two waist-shaped holes are formed in the second horizontal plate; the second vertical plate is provided with a speed measuring probe mounting hole; the mounting bracket is fixed together by screws through two waist-shaped holes and a pair of threaded holes. The invention has the advantages of firm fixation, convenient and fast installation, adjustability and the like, and ensures the reliability and stability of the core signal of the unit control.)

1. The utility model provides an adjustable fixing device of large-scale hydroelectric set speed probe which characterized in that: comprises a base (1) and four mounting brackets (2);

the base (1) is L-shaped and comprises a first horizontal plate (1 a) and a first vertical plate (1 b); one side of the first horizontal plate (1 a), which is far away from the first vertical plate (1 b), is an arc surface, and the edge of one side of the first horizontal plate (1 a), which is far away from the first vertical plate (1 b), is provided with four pairs of threaded holes (1 c); a plurality of screw holes (1 d) are formed in the lower edge of the first vertical plate (1 b);

the mounting bracket (2) is L-shaped and comprises a second horizontal plate (2 a) and a second vertical plate (2 b); two waist-shaped holes (2 c) are formed in the second horizontal plate (2 a); a speed measuring probe mounting hole (2 d) is formed in the second vertical plate (2 b);

the mounting bracket (2) is fixed together by screws (3) through two waist-shaped holes (2 c) and a pair of threaded holes (1 c).

2. The adjustable fixing device of a speed measuring probe of a large hydroelectric generating set according to claim 1, characterized in that: the radius of the arc surface is consistent with the radius of a large shaft (4) of the water turbine.

3. The adjustable fixing device of a speed measuring probe of a large hydroelectric generating set according to claim 1 or 2, characterized in that: the diameter of the speed measuring probe mounting hole (2 d) is consistent with that of the speed measuring probe (6) mounting part.

Technical Field

The invention belongs to the technical field of fixing devices of speed measuring probes of large-scale hydroelectric generating sets, and particularly relates to an adjustable fixing device of a speed measuring probe of a large-scale hydroelectric generating set.

Background

The speed measuring system of the Tiandi power plant unit detects the rotating speed of the unit by adopting the proximity travel switch, the reliable measuring distance of the proximity travel switch is 2.592-5.184 mm, the specified mounting distance of the speed measuring probe and the fluted disc is 4mm, and the positive and negative deviation is 1mm, so that the speed measuring probe cannot normally acquire the rotating speed of the unit. In the use process, the speed measuring system of our factory appears for many times, because the distance between the speed measuring probe and the fluted disc can not meet the requirement, the probe is damaged, the teeth are lost and the like, and the unit operation is abnormal. Therefore, the requirement on the installation process of the speed measuring probe is quite high; meanwhile, the original speed measuring probe support is very simple and easy, the speed measuring probe is very difficult to install and adjust, especially after the speed regulator is transformed, 4 sets of speed measuring devices are needed by the speed regulator and the LCU control system of the unit, and the original mounting support cannot meet the requirements at all.

Therefore, it is necessary to develop an adjustable fixing device for a speed measuring probe of a large-sized hydroelectric generating set.

Disclosure of Invention

The invention aims to provide an adjustable fixing device for a speed measuring probe of a large hydroelectric generating set, and aims to solve the problems that an existing support is unstable, large in vibration, difficult to install and adjust the speed measuring probe and low in working efficiency.

The adjustable fixing device for the speed measuring probe of the large hydroelectric generating set comprises a base and four mounting brackets;

the base is L-shaped and comprises a first horizontal plate and a first vertical plate; one side of the first horizontal plate, which is far away from the first vertical plate, is an arc surface, and four pairs of threaded holes are uniformly formed in the edge of one side of the first horizontal plate, which is far away from the first vertical plate; a plurality of screw holes are formed in the lower edge of the first vertical plate;

the mounting bracket is L-shaped and comprises a second horizontal plate and a second vertical plate; two waist-shaped holes are formed in the second horizontal plate; the second vertical plate is provided with a speed measuring probe mounting hole;

the mounting bracket is fixed together by screws through two waist-shaped holes and a pair of threaded holes.

The radius of the arc surface is consistent with the radius of the large shaft of the water turbine, so that the fitting degree of the arc surface and the large shaft is ensured, and the effective installation distance of the installation support is ensured.

The diameter of speed measuring probe mounting hole is unanimous with the diameter of speed measuring probe installation department, is favorable to promoting speed measuring probe's installation accuracy.

During installation, the rough position is determined by using the adjusting stroke of the speed measuring probe, the speed measuring probe is fixed on the mounting bracket, then the distance between the speed measuring probe and the fluted disc is adjusted quickly and accurately through the waist-shaped hole on the mounting bracket, and finally the screws of the mounting bracket and the base are fastened.

The invention has the beneficial effects that: the mounting bracket and the base are designed in a separated mode, wherein the base can effectively solve the problem that the harsh requirements of the speed measuring probe on the detection distance precision are influenced due to strong mechanical vibration and overlarge swing of the mounting position of the speed measuring probe; the mounting bracket can effectively meet the requirement of the speed measuring probe on the accurate adjustment of the working distance, and can quickly and conveniently adjust the detection distance of the speed measuring probe;

(2) the base can be provided with four mounting brackets, so that the requirement of field on multi-probe mounting can be met, and the problem that the mounting is influenced in the multi-probe mounting process is effectively solved;

(3) the original working time needing a morning is shortened to only 30 minutes, and the working efficiency is greatly improved.

In conclusion, the invention has the advantages of firm fixation, convenient and fast installation, adjustability and the like, ensures the reliability and stability of the core signals of the unit control, and improves the convenience of installation and removal of the device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a base according to the present invention;

FIG. 3 is a second schematic structural view of the base of the present invention;

FIG. 4 is a schematic view of a mounting bracket according to the present invention;

FIG. 5 is a second schematic structural view of the mounting bracket of the present invention;

FIG. 6 is a state diagram of the present invention in use;

in the figure: 1. the base, 1a, first horizontal plate, 1b, first vertical board, 1c, screw hole, 1d, screw hole, 2, installing support, 2a, second horizontal plate, 2b, the vertical board of second, 2c, waist type hole, 2d, speed measuring probe mounting hole, 3, screw, 4, macroaxis, 5, fluted disc, 6, speed measuring probe.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the adjustable fixing device for the speed measuring probe of the large hydroelectric generating set comprises a base 1 and four mounting brackets 2. The base 1 is L-shaped and comprises a first horizontal plate 1a and a first vertical plate 1 b; one side of the first horizontal plate 1a, which is far away from the first vertical plate 1b, is an arc surface, and four pairs of threaded holes 1c are uniformly formed in the edge of the first horizontal plate 1a, which is far away from the first vertical plate 1 b; a plurality of screw holes 1d are formed in the lower edge of the first vertical plate 1b, and in the embodiment, the number of the screw holes 1d is four. The mounting bracket 2 is L-shaped and comprises a second horizontal plate 2a and a second vertical plate 2 b; two waist-shaped holes 2c are formed in the second horizontal plate 2 a; and a speed measuring probe mounting hole 2d is formed in the second vertical plate 2 b. The mounting bracket 2 is fixed together by screws 3 through two kidney-shaped holes 2c and a pair of threaded holes 1 c.

As shown in fig. 2, in the present embodiment, the base 1 is made of 304 stainless steel with a thickness of 10mm, so that the base 1 is ensured to be stable and not deformed. The side face of the base 1 close to the side of the large shaft 4 adopts an arc surface with the diameter consistent with that of the large shaft 4 so as to ensure the fitting degree of the base 1 and the large shaft 4 and ensure the effective installation distance of the installation support 2.

As shown in fig. 5, in the present embodiment, the mounting bracket 2 is made of 304 stainless steel with a thickness of 5 mm; the diameter of the speed measuring probe mounting hole 2d is consistent with that of the speed measuring probe 6 mounting part, so that the mounting precision of the speed measuring probe 6 is improved; the width of the waist-shaped hole 2c is 8.2mm, and the length is 25 mm.

As shown in FIG. 6, in use, the base 1 is first fixed on the flying pendulum base by screws 3 through four screw holes 1d on the first vertical plate 1b to ensure that the base 1 is firmly and stably installed. Four movably adjustable mounting brackets 2 are then mounted to the first horizontal plate 1a of the base 1, but the screws 3 for fastening the mounting brackets 2 and the base 1 are not tightened. Then, the speed measuring probe 6 is installed on the second vertical plate 2b of the installation support 2, the installation distance between the speed measuring probe 6 and the fluted disc 5 is roughly adjusted, and then the speed measuring probe 6 is installed in place; and then the distance between the second vertical plate 2b and the fluted disc 5 is adjusted one by one through the kidney-shaped hole 2c on the mounting bracket 2, so that the distance between the speed measuring probe 6 and the fluted disc 5 is adjusted. After the distance between the speed measuring probe 6 and the fluted disc 5 is adjusted, the screw 3 used for fastening the base 1 and the mounting bracket 2 is screwed down.