CN205370837U - Novel tubular turbine telescopic joint structure - Google Patents

Abstract

The purpose of this utility model is to provide a new type of tubular hydraulic turbine expansion joint structure, including expansion joints, runner chamber, foundation ring, several first sealing grooves, second sealing grooves, third sealing grooves, bolts, pins, Backing rings, several adjusting bolts, several nuts, several pads, the first sealing groove and the second sealing groove are located on the expansion joint, and the bolts and pins connect the expansion joint and the base ring through the horizontal through hole of the expansion joint. The backing ring is located between the expansion joint and the base ring, the third sealing groove is located on the backing ring, rubber strips are arranged inside the first sealing groove, the second sealing groove, and the third sealing groove, and the adjusting bolt passes through the vertical direction of the expansion joint. The through hole connects the telescopic joint and the runner chamber; the beneficial effect of the utility model: this scheme increases the number of seals on the basis of the original structure, and adds an adjusting bolt between the telescopic joint and the runner chamber to adjust the two The gap between the two, the improved expansion joint is easy to adjust, and the sealing effect is good.

Description

Expansion Joint Structure of New Type Tubular Turbine

technical field

The utility model relates to the field of water turbine manufacturing and processing, in particular to a novel tubular water turbine expansion joint structure.

Background technique

The tubular turbine is equipped with an expansion joint between the runner chamber and the foundation ring. The expansion joint is used to provide space for the runner chamber to expand when heated and contract when cooled, and to eliminate the distance between the tubular seat and the foundation ring due to installation The connection structure that caused the error. As a large annular part, the structure of the expansion joint of the tubular turbine is difficult to process. Because it is a structure divided into two halves, it is easy to cause the two halves to be out of center, so that the gap between the runner chamber and the runner chamber is likely to be uneven after installation, and the seal cannot be sealed. The effect of this will lead to serious water leakage between the runner chamber and the base ring, difficult adjustment of the seal, and difficult adjustment of the concentricity of the pressure ring in the expansion joint.

Utility model content

In view of the above problems, the purpose of this utility model is to provide an expansion joint structure of a tubular water turbine that is easy to produce, adjust, assemble and has good sealing performance and can be used universally.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a new tubular hydraulic turbine expansion joint structure, which is characterized in that it includes an expansion joint, a runner chamber, a foundation ring, several first sealing grooves, a second sealing groove, the third sealing groove, bolts, pins, backing rings, several adjusting bolts, several nuts, and several spacers. The telescopic joint is located above the runner chamber, and the section of the telescopic joint is in an "L" shape. The first sealing groove and the second sealing groove are located on the expansion joint, the vertical side of the expansion joint is provided with several horizontal through holes, and the horizontal side of the expansion joint is provided with several vertical through holes , the backing ring is located between the expansion joint and the base ring, the bolts and pins connect the expansion joint, the backing ring and the base ring through the horizontal through holes of the expansion joint, the third sealing groove is located on the backing ring, the The inside of the first sealing groove, the second sealing groove and the third sealing groove are all equipped with rubber strips, the pad is located above the runner chamber, the pad is fixedly connected with the runner chamber, and the adjusting bolt passes through the expansion joint The through hole in the vertical direction connects the expansion joint with the runner chamber, and the nut is fixed with the adjusting bolt.

Further, the spacer is connected with the runner chamber by welding.

Further, the number of several spacers is 40.

Further, the number of the several adjusting bolts and the several nuts is 40, and the specifications of the adjusting bolts and nuts are M48.

Further, the cross-sections of the first sealing groove and the third sealing groove are both rectangular structures.

Further, the cross-section of the second sealing groove is a triangular structure.

The utility model has the advantages of:

This scheme increases the number of seals on the basis of the original structure, and adds adjusting bolts between the expansion joint and the runner chamber to adjust the gap between the expansion joint and the runner chamber. The improved expansion joint is easy to adjust, and Seals well.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some implementations of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative work.

Fig. 1 is the structural representation of the utility model.

in:

1. Expansion joint 2. Runner chamber 3. Base ring 4. First sealing groove

5. Second seal groove 6. Third seal groove 7. Bolt 8. Pin

9. Backing ring 10. Adjusting bolt 11. Nut 12. Block

detailed description

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific The azimuth structure and operation, therefore can not be construed as the limitation of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

As shown in Figure 1, a new tubular hydraulic turbine expansion joint structure is characterized in that it includes an expansion joint 1, a runner chamber 2, a foundation ring 3, a number of first sealing grooves 4, a second sealing groove 5, a first Three sealing grooves 6, bolts 7, pins 8, backing rings 9, several adjusting bolts 10, several nuts 11, and several pads 12, the expansion joint 1 is located above the runner chamber 2, and the section of the expansion joint 1 is It is an "L" shaped structure, the first sealing groove 4 and the second sealing groove 5 are located on the telescopic joint 1, the vertical side of the telescopic joint 1 is provided with several horizontal through holes, and the telescopic joint 1 is horizontal There are several vertical through holes on one side, the backing ring 9 is located between the expansion joint 1 and the base ring 3, and the bolts 7 and pins 8 connect the expansion joint 1 and the pad through the horizontal through holes of the expansion joint 1. The ring 9 and the basic ring 3 are combined, the third sealing groove 6 is located on the backing ring 9, the first sealing groove 4, the second sealing groove 5, and the third sealing groove 6 are all provided with rubber strips inside, mainly To achieve the sealing effect, the cushion block 12 is located above the runner chamber 2, the cushion block 12 is fixedly connected with the runner chamber 2, and the adjusting bolt 10 connects the telescopic joint 1 to the rotary joint through the through hole in the vertical direction of the telescopic joint 1. The wheel chamber 2 is closed, and the nut 11 is fixed with the adjusting bolt 10 .

Further, the spacer 12 is connected with the runner chamber 1 by welding.

Further, the number of the several pads 12 is 40.

Further, the number of the several adjusting bolts 10 and the several nuts 11 is 40, and the specifications of the adjusting bolts 10 and the nuts 11 are M48.

Further, the cross-sections of the first sealing groove 4 and the third sealing groove 6 are both rectangular structures.

Further, the cross-section of the second sealing groove 5 is a triangular structure.

Working method: When in use, after the runner chamber 2 and the expansion joint 1 are installed, install the rubber strip inside the first sealing groove 4 and the rubber strip inside the second sealing groove 5 on the expansion joint 1, and place the rubber strip inside the second sealing groove 5 on the expansion joint 1. The rubber strip of the third sealing groove 6 is installed on the backing ring 9, first install the backing ring 9 on the runner chamber 2, then press the expansion joint 1 on the backing ring 9, and use the bolt 7 to connect the expansion joint 1 and the backing ring 9 is combined with 3 basic rings. At the same time, 40 pads 12 are welded on the runner chamber 2, and the adjusting bolt 10 and the adjusting nut 11 are installed on the telescopic joint 1, so that the adjusting bolt 10 is supported on the pad 12, and the adjustment bolt 10 is tightened and loosened Adjust the gap between the runner chamber 2 and the contact surface of the base ring 3, so as to achieve the effect of pressing the rubber strip, so that the sealing effect of the rubber strip can reach the best. After the adjustment is completed, tighten the adjusting nut 11 to play a fixed role. When the gap between the runner chamber 2 and the base ring 3 changes during operation or the compression amount of the rubber strip is not enough, this method can also be used to achieve the effect of compression and sealing. The structure of this kind of expansion joint has greatly improved the difficulty of adjusting the expansion joint due to the difficulty in processing large parts during the installation process, and the water leakage during the operation of the unit due to insufficient compression of the rubber strip, especially It is simple, convenient and easy to process and operate for the transformation of the expansion joint of the operating unit.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the embodiments of the present utility model Scope of technical solutions.

Claims (6)

1. A new type of tubular hydraulic turbine expansion joint structure, characterized in that it includes expansion joints, runner chambers, foundation rings, several first sealing grooves, second sealing grooves, third sealing grooves, bolts, pins, pads Ring, several adjusting bolts, several nuts, several spacers, the telescopic joint is located above the runner chamber, the cross-section of the telescopic joint is an "L"-shaped structure, the first sealing groove and the second sealing groove are located On the expansion joint, several horizontal through holes are provided on the vertical side of the expansion joint, and several vertical through holes are provided on the horizontal side of the expansion joint. The backing ring is located between the expansion joint and the base ring. Between, the bolt and the pin connect the telescopic joint with the backing ring and the base ring through the horizontal through hole of the telescopic joint, the third sealing groove is located on the backing ring, the first sealing groove, the second sealing groove, the second sealing groove There are rubber strips inside the three sealing grooves. The pad is located above the runner chamber. The pad is fixedly connected with the runner chamber. The adjusting bolt connects the telescopic joint to the runner through the through hole in the vertical direction of the telescopic joint. The chamber is closed, and the nut is fixed with the adjusting bolt. 2. A novel tubular hydraulic turbine expansion joint structure according to claim 1, characterized in that: the spacer is connected to the runner chamber by welding. 3. A novel tubular hydraulic turbine expansion joint structure according to claim 1, wherein the number of the pads is 40. 4. A novel tubular water turbine expansion joint structure according to claim 1, characterized in that: the number of several said adjusting bolts and several said nuts is 40, and the specifications of said adjusting bolts and nuts Both are M48. 5. A novel tubular hydraulic turbine expansion joint structure according to claim 1, characterized in that: the cross-sections of the first sealing groove and the third sealing groove are both rectangular structures. 6. A novel tubular hydraulic turbine expansion joint structure according to claim 1, characterized in that: the cross-section of the second sealing groove is a triangular structure.