CN201090352Y - Interior ring assembly of hydraulic turbine taper water distributor - Google Patents

Abstract

The utility model relates to a tapered water-guiding mechanism of hydraulic turbine, in particular to an internal ring assembly for tapered water-guiding mechanism of hydraulic turbine that only tapered plate needs to be detached so that tapered vanes of hydraulic turbine can be assembled or disassembled conveniently. The utility model aims at the problem that the tapered water-guiding mechanism of the prior hydraulic turbine has complicated structure, large processing amount, and a large amount of time-labor consumption for assembling and disassembling vanes, thereby providing an internal ring assembly of tapered water-guiding mechanism of hydraulic turbine with simple structure, convenient assembly and disassembly for guide vanes, and economy. The utility model adopts technical proposal that: the internal ring assembly for tapered water-guiding mechanism is formed by the following: the tapered plates with the same quantities as the guide vanes are arranged fixedly on the internal ring body by stainless steel bolts, wherein the internal ring body is a basin structure with holes at the middle.

Description

The inner ring assembly of the conical water guiding mechanism of the water turbine

technical field

The utility model relates to a conical water guiding mechanism of a hydraulic turbine, in particular to an inner ring assembly of the conical water guiding mechanism of a hydraulic turbine which can be conveniently assembled and disassembled by only disassembling the conical plate.

Background technique

The water turbine, which converts water flow energy into mechanical energy, is the most important and versatile power machine in modern times. The water guiding mechanism is an essential part of the water turbine. There are many structural types of the water guiding mechanism, and various types of water turbines are classified according to the hydraulic parameters in nature, and the type of the water guiding mechanism matches the type of the water turbine. Among them, the water guiding mechanism of the tubular turbine is a conical water guiding mechanism. The assembly and disassembly of the guide vane is different from the assembly and disassembly of the guide vane of the general structure. The assembly and disassembly process of the conical guide vane is a spatial movement. And the profile line of the tapered guide vane is composed of three dimensions. For the guide vane with large twist and thick blade shape, it is impossible to turn the guide vane into place in the limited space between the inner and outer rings of the integral guide vane and the guide vane gap specified by the industry standard as 1‰ guide vane height.

The structure of the existing conical water guide mechanism is to divide the outer ring or inner ring of the guide vane into sections according to the center line of the guide vane shaft. For the guide vane, in addition to removing all the parts on the guide vane shaft at the corresponding end, so that all the guide vanes are separated from the inner ring or outer ring, a lot of related parts need to be removed, and then the segmented surface can be disassembled to install and disassemble the guide vane. For the segmented The entire runner chamber and the straight tapered pipe should be dismantled before the ring is disassembled. The lower half of the runner chamber is connected to the machine foundation. As we all know, it is difficult to restore the original state of the machine after the foundation is moved and reinstalled, which will inevitably affect the installation quality of the machine. Before dismantling the sub-sections of the sub-section inner ring, the entire guide bearing, the main shaft seal and the upper half of the runner chamber should also be dismantled. After the guide bearing has been assembled and disassembled many times, the stability of the machine operation will be affected. At the same time, there is also water leakage in the above structure. Water leakage in the outer ring section will pollute the power plant building, and water leakage in the inner ring section will enter the oil guide bearing oil tank, resulting in unsafe operation of the unit. Of course, there are also inner and outer rings with an integral structure, and all the guide vanes must be hung on the outer ring when the power station is installed, which has potential safety hazards, and the addition of lifting equipment for the power station is poor in economy and safety. When replacing the guide vanes, it is necessary to move the foundation of the runner chamber and remove the main shaft sealing parts, and then move the outer ring together with 16 or 24 guide vanes and move axially. There will be personal safety accidents in the operation under the guide vane of the inner cavity of the outer ring with a weight of ten tons. To ensure the safety of the maintenance personnel, it is necessary to dismantle the entire shafting of a few meters or more than ten meters long, then move the outer ring out of the machine and turn it over to lie down, and then remove and install the guide vanes. The rotating shaft system will affect the service life of the machine after repeated assembly and disassembly. In addition, the outer ring is a thin shell plate weldment, which is hoisted together with the guide vane. The outer ring is easily deformed. The original gap, the gap increases and the leakage increases accordingly.

Contents of the invention

The utility model aims at the deficiencies of the existing cone-shaped water guiding mechanism of the hydraulic turbine, such as complex structure, large processing amount, and time-consuming and laborious assembly and disassembly of the guide vanes, and provides a simple structure, convenient assembly and disassembly of the guide vanes, and economical and practical use. It is used in the inner ring assembly of the conical water guiding mechanism of the water turbine.

The technology adopted in the utility model is completed in the following way: the inner ring assembly of the conical water guide mechanism of the water turbine is formed by fixing the same number of conical plates as the guide vanes on the inner ring body through stainless steel bolts, wherein the inner ring The body is a pot-shaped structure with a hole in the middle.

Compared with the existing structure of the conical water guide mechanism of the water turbine, the utility model has the characteristics of reasonable design, simple and compact mechanical structure, reduced processing amount, reduced manufacturing cost, and simplified operation procedures. Removed inner ring assembly.

Description of drawings

Fig. 1 is a structural schematic diagram of the inner ring assembly of the conical water guiding mechanism of the water turbine.

Detailed ways

Below with reference to accompanying drawing, the utility model is further described by embodiment.

Referring to accompanying drawing 1, an inner ring assembly of a conical water guide mechanism of a water turbine, the inner ring assembly is formed by fixing the same number of conical plates 2 as guide vanes on the inner ring body 1 through stainless steel bolts 3, The inner ring body 1 is a pot-shaped structure with holes in the middle, and the stainless steel bolts 3 are M8 stainless steel bolts. A guide bearing component 4 is installed at the center hole of the inner ring body 1 .

During use, when various sundries in the river flow down with the water, some sundries such as wood enter between the two guide vanes 6 of the water turbine and may damage the guide vanes 6 . The damaged guide vane 6 must be repaired or replaced. When a certain guide vane 6 needs to be repaired or replaced, the upper runner chamber 9, the main shaft sealing part 5 and the relevant parts at the big end of the guide vane 6 must be removed. Guide vanes 6 corresponding left and right two tapered plates 2, only need to unscrew 6 bolts 3 when dismantling the tapered plates 2. Then use 2 M10 screws to screw into the screw holes on it, lift it up and take it out obliquely. Then there is a space 15mm deep for installing and dismounting the guide vane 6 on the inner ring body 1, and the guide vane 6 is rotated in the space and then moved to the outside of the inner ring 1. Then tilt the guide vane 6, and place the profile section in a vertical position, then obliquely go out from between the two blades of the runner 8 to the upper part of the runner chamber 9, and press the reverse procedure of removing the guide vane 6 when installing the guide vane 6 Put it in, then put the disassembled parts back together. It is especially easy to install the water guiding mechanism in the power station. It is only necessary to install the inner ring 1 and the outer ring 7 of the guide vane 6 in place respectively. Turn one by one guide vanes 6 into place between the inner ring 1 and the outer ring 7, and finally put all the tapered plates 2 into it. The water guiding mechanism is ready for installation.

Claims (2)

1. the interior ring assembly of a water turbine Cone Guide Apparatus, it is characterized in that ring assembly is to form on the ring body (1) in being fixed on by stainless steel bolt (3) by the conical plate (2) with the stator equal number in this, wherein interior ring body (1) is middle bathtub construction with holes.

2. the interior ring assembly of water turbine Cone Guide Apparatus according to claim 1 is characterized in that stainless steel bolt (3) adopts the M8 stainless steel bolt.

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