A detachable steam turbine nozzle ring

Abstract

The utility model discloses a detachable steam turbine nozzle ring, and the nozzle is multiple and is arranged between the inner ring body and the outer ring body in the same direction, the nozzle includes the fairwater, the inboard and the outboard, and the two of fairwater are connected with the inboard and the outboard respectively, the inboard bottom is provided with first protruding, the outboard bottom is provided with second protruding, the inboard and the outboard are all seted up first screw hole at the fairwater department, and first protruding and second protruding all set up second screw hole, and the inboard is cooperated with the outer wall of inner ring body, and the outboard is cooperated with the inner wall of outer ring body, the utility model discloses reasonable structure, and the nozzle is fastened and is connected with the inner ring body and the outer ring body through first bolt and second bolt, and the detachable structure is convenient for the replacement of nozzle and is cleaned after -period, and the processing of integral type nozzle ring is more convenient, and does not need to carry out integral processing through large -scale milling machine, and the requirement of processing equipment is reduced greatly, and even if the processing of certain nozzle fails, the cost is also not the loss of integral processing failure.

Description

Technical Field

[0001] This utility model relates to the field of nozzle ring technology, specifically a detachable steam turbine nozzle ring. Background Technology

[0002] The main function of nozzle rings in steam turbines is to efficiently convert the thermal energy of steam into kinetic energy to drive the turbine. When steam passes through the nozzles, its energy is converted, forming a high-speed steam flow, which in turn drives the turbine.

[0003] Most existing nozzle rings adopt a one-piece structure, which is difficult to process. If a nozzle is processed incorrectly, the entire nozzle ring will fail, wasting production and time costs. In addition, the nozzle rings used for steam turbines are generally large in size and require large milling machines for processing, which places high demands on the processing equipment. Therefore, there is an urgent need for an improved technology to solve this problem in the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide a detachable turbine nozzle ring to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a detachable turbine nozzle ring, comprising a nozzle, an inner ring body, and an outer ring body. Multiple nozzles are arranged in the same direction between the inner and outer ring bodies. Each nozzle includes a guide plate, an inner side plate, and an outer side plate. The guide plate is connected to the inner and outer side plates at two points. The bottom of the inner side plate has a first protrusion, and the bottom of the outer side plate has a second protrusion. Both the inner and outer side plates have first screw holes at the guide plate location, and these first screw holes extend into the guide plate. The first protrusion and... Each of the second protrusions has a second screw hole. The inner side plate mates with the outer wall of the inner ring body, and the outer side plate mates with the inner wall of the outer ring body. The inner ring body is fastened to the first screw hole of the inner side plate and the second screw hole of the first protrusion by two first bolts respectively. The outer ring body is fastened to the first screw hole of the outer side plate and the second screw hole of the second protrusion by two second bolts respectively. The outer wall of the inner ring body has a first annular groove, and the first protrusion is disposed in the first annular groove. The inner wall of the outer ring body has a second annular groove, and the second protrusion is disposed in the second annular groove.

[0006] Preferably, the present invention provides a detachable turbine nozzle ring in which the first protrusion and the second protrusion of two adjacent nozzles are tightly connected.

[0007] Preferably, the present invention provides a detachable turbine nozzle ring, wherein two adjacent nozzles form an airflow channel through their respective guide plates.

[0008] Preferably, the present invention provides a detachable turbine nozzle ring, wherein the inner ring body has a plurality of first countersunk holes in the radial direction, the first bolts cooperate with the first countersunk holes, and a plurality of third screw holes are provided on one end surface of the inner ring body in the axial direction.

[0009] Preferably, the present invention provides a detachable turbine nozzle ring, wherein the outer ring body has a plurality of second countersunk holes along the radial direction, and the second bolt cooperates with the second countersunk holes.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The entire nozzle ring consists of an inner ring body, an outer ring body, and a nozzle. The nozzle is fastened to the inner and outer ring bodies by the first and second bolts. The detachable structure facilitates cleaning after nozzle replacement. It is also easier to process than an integrated nozzle ring, and does not require machining on a large milling machine, which greatly reduces the requirements for processing equipment. In addition, even if a nozzle is machined incorrectly, the cost is not as great as the loss from a complete machining failure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the nozzle structure;

[0014] Figure 3 This is a schematic diagram of the nozzle structure viewed from below.

[0015] Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention located at the nozzle;

[0016] Figure 5 This is a schematic diagram showing the positional relationship between the nozzle and the inner and outer ring bodies;

[0017] Figure 6 For the appendix Figure 5 Enlarged structural diagram of point A in the middle.

[0018] In the figure: Nozzle 1, Inner Ring 2, Outer Ring 3, Guide Plate 4, Inner Side Plate 5, Outer Side Plate 6, First Protrusion 7, Second Protrusion 8, First Screw Hole 9, Second Screw Hole 10, First Bolt 11, Second Bolt 12, First Annular Groove 13, Second Annular Groove 14, First Countersunk Hole 15, Third Screw Hole 16, Second Countersunk Hole 17. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please see Figure 1-6This utility model provides a technical solution: a detachable turbine nozzle ring, including a nozzle 1, an inner ring body 2, and an outer ring body 3. Multiple nozzles 1 are arranged in the same direction between the inner ring body 2 and the outer ring body 3. Each nozzle 1 includes a guide plate 4, an inner side plate 5, and an outer side plate 6. The guide plate 4 is connected to the inner side plate 5 and the outer side plate 6 at two points respectively. Two adjacent nozzles 1 form an airflow channel through their respective guide plates 4. The airflow channel between the two guide plates 4 allows steam to pass directionally through the nozzle ring, thereby driving the rotation of the rear blades. The bottom of the inner side plate 5 is provided with... There is a first protrusion 7, and a second protrusion 8 is provided at the bottom of the outer side plate 6. Both the inner side plate 5 and the outer side plate 6 have first screw holes 9 at the location of the guide plate 4, extending into the guide plate 4. The first protrusion 7 and the second protrusion 8 each have second screw holes 10. The inner side plate 5 mates with the outer wall of the inner ring body 2, and the outer side plate 6 mates with the inner wall of the outer ring body 3. The inner ring body 2 is fastened to the first screw hole 9 of the inner side plate 5 and the second screw hole 10 of the first protrusion 7 by two first bolts 11. The inner ring body 2 has multiple first countersunk holes 15 radially. Bolt 11 and first countersunk hole 15 cooperate with each other. The first countersunk hole 15 serves two purposes: first, it allows for the placement of the first bolt 11, and second, it ensures that the head of the first bolt 11 can be concealed. Several third screw holes 16 are formed on one end surface of the inner ring body 2 along the axial direction. These third screw holes 16 are used to fasten the inner ring body 1 to corresponding positions inside the turbine, thus achieving the installation of the entire nozzle ring. The outer ring body 3 is fastened to the first screw hole 9 of the outer side plate 6 and the second screw hole 10 of the second protrusion 8 by two second bolts 12, respectively. The outer ring body 3 has several screw holes formed radially. A second countersunk hole 17 is provided, and the second bolt 12 is engaged with the second countersunk hole 17. The second countersunk hole 17 is used to place the second bolt 12 and to ensure that the head of the second bolt 12 can be hidden. The outer wall of the inner ring body 2 is provided with a first annular groove 13, and the first protrusion 7 is provided in the first annular groove 13. The inner wall of the outer ring body 3 is provided with a second annular groove 14, and the second protrusion 8 is provided in the second annular groove 14. The first protrusion 7 and the second protrusion 8 of two adjacent nozzles 1 are tightly connected to ensure the stability between the two adjacent nozzles 1.

[0022] Assembly method and operating principle: First, place the outer ring body 3 and the inner ring body 2 approximately coaxially, with the inner ring body 2 located inside the outer ring body 3. Then, tap the nozzle 1 at the corresponding position to create two first screw holes 9 and two second screw holes 10. Next, place the first nozzle 1 between the inner ring body 2 and the outer ring body 3. After aligning the holes, pass the first bolt 11 through the first countersunk hole 15 of the inner ring body 2 and tighten it to the first screw hole 9 of the inner side plate 5 and the second screw hole 10 of the first protrusion 7. Pass the second bolt 12 through the second countersunk hole 17 of the outer ring body 3 and tighten it to the first screw hole 9 of the outer side plate 6 and the second screw hole 10 of the second protrusion 8, thus completing the installation of the first nozzle 1. Then, place the nozzles 1 between the inner ring body 2 and the outer ring body 3, with each pair of nozzles 1 tightly connected. Finally, tighten all the nozzles 1 to the inner ring body 2 and the outer ring body 3 respectively using the first bolt 11 and the second bolt 12 to complete the assembly. In use, the inner ring 2 is fastened to the internal mounting bracket of the steam turbine through the third screw hole 16 and bolts, completing the installation of the nozzle ring. During operation, the airflow generated by the moving blades is guided through the airflow channel between the guide plates 4 of the two adjacent nozzles 1. This utility model has a reasonable structure. The entire nozzle ring consists of an inner ring 2, an outer ring 3, and nozzles 1. The nozzles 1 are fastened to the inner ring 2 and the outer ring 3 through the first bolt 11 and the second bolt 12. The detachable structure facilitates the cleaning of the nozzles 1 after replacement. It is also more convenient to process than an integrated nozzle ring, and does not require overall processing by a large milling machine, greatly reducing the requirements for processing equipment. In addition, even if a single nozzle 1 is processed incorrectly, the cost is not as great as the loss from overall processing failure.

[0023] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0024] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A detachable turbine nozzle ring, characterized in that: The device includes a nozzle (1), an inner ring body (2), and an outer ring body (3). Multiple nozzles (1) are arranged in the same direction between the inner ring body (2) and the outer ring body (3). Each nozzle (1) includes a guide plate (4), an inner side plate (5), and an outer side plate (6). The guide plate (4) is connected to the inner side plate (5) and the outer side plate (6) at two points. The bottom of the inner side plate (5) has a first protrusion (7), and the bottom of the outer side plate (6) has a second protrusion (8). Both the inner side plate (5) and the outer side plate (6) have first screw holes (9) at the guide plate (4), extending into the guide plate (4). The first protrusion (7) and the second protrusion (8) each have second screw holes (10). The inner side plate... (5) The outer side plate (6) is fitted with the outer wall of the inner ring body (2). The inner ring body (2) is fastened to the first screw hole (9) of the inner side plate (5) and the second screw hole (10) of the first protrusion (7) by two first bolts (11). The outer ring body (3) is fastened to the first screw hole (9) of the outer side plate (6) and the second screw hole (10) of the second protrusion (8) by two second bolts (12). The outer wall of the inner ring body (2) is provided with a first annular groove (13). The first protrusion (7) is set in the first annular groove (13). The inner wall of the outer ring body (3) is provided with a second annular groove (14). The second protrusion (8) is set in the second annular groove (14).

2. The detachable turbine nozzle ring according to claim 1, characterized in that: The first protrusion (7) and the second protrusion (8) of two adjacent nozzles (1) are closely connected.

3. A detachable turbine nozzle ring according to claim 1, characterized in that: The two adjacent nozzles (1) form an airflow channel through their respective guide plates (4).

4. A detachable turbine nozzle ring according to claim 1, characterized in that: The inner ring (2) has a plurality of first countersunk holes (15) in the radial direction, and the first bolt (11) cooperates with the first countersunk holes (15). The inner ring (2) has a plurality of third screw holes (16) on one end surface and in the axial direction.

5. A detachable turbine nozzle ring according to claim 1, characterized in that: The outer ring (3) has a plurality of second countersunk holes (17) in the radial direction, and the second bolt (12) cooperates with the second countersunk holes (17).

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