Anti-corrosion axial mortise rotor structure

Abstract

The utility model discloses an anti-corrosion axial mortise rotor structure which comprises a main shaft hub, a first-stage moving blade, a blade separating block and a second-stage moving blade, and the first-stage moving blade and the second-stage moving blade respectively comprise a moving blade tenon section and a blade body section. The moving blade tenon sections of the first-stage moving blade and the second-stage moving blade are axially arranged in the mortises of the main shaft hub, the blade separation block is connected with the main shaft hub through the blade separation block tenon sections and arranged between the first-stage moving blade and the second-stage moving blade, and sealing grooves are formed in the two sides of the moving blade tenon sections in the axis direction. Sealing grooves are also formed in the periphery of the tenon section of the blade separation block, polytetrafluoroethylene rubber pipes are arranged at the sealing grooves, and baffle sealing structures are further arranged at the two ends of the main shaft hub. The problems that in the prior art, due to the fact that a mortise of an axial mortise rotor structure cannot be sealed, the mortise and a tenon are corroded by components in coal gas, disassembly is difficult when blades are replaced, and a main shaft mortise is prone to being corroded are solved.

Description

Technical Field

[0001] This utility model relates to the field of rotor structure, and in particular to a corrosion-resistant axial tenon-groove rotor structure. Background Technology

[0002] Blast furnace turbines are energy-saving and consumption-reducing products that are strongly promoted by the state. They utilize the pressure of the gas at the top of the blast furnace to expand the gas through the turbine, thereby driving a generator to produce electricity or a fan to reduce energy consumption. Not only do they not consume any fuel, but they also reduce environmental pollution, helping enterprises reduce emissions and increase efficiency.

[0003] The rotor, as the core component of the blast furnace turbine, mainly consists of a main shaft, moving blades, and partition blades. The manufacturing processes for the main shaft and moving blades are relatively mature. The rotor's direction of rotation is determined by the direction of the moving blades, and the rotor's working efficiency is determined by the gas pressure, temperature, and flow rate. The blast furnace turbine is designed based on the blast furnace's production capacity. The rotor converts the kinetic energy of the gas into mechanical energy under the action of centrifugal force.

[0004] The existing rotor structure, assembled with an axial tenon-groove main shaft, has moving blades and partition blocks installed from the rotor tenon direction. Secondary moving blades are axially positioned by stop pins, and primary moving blades are axially positioned by stop pins and stop locking plates. Partition blocks separate the primary and secondary moving blades. The designed gap between the tenon and tenon is 0.08-0.12mm. When the rotor is assembled, gaps exist between the primary moving blade and the partition block, between the secondary moving blade and the partition block, between the blades themselves, and between the partition blocks. The rotor tenon ends are not sealed, and all components mounted on the rotor hub are directly exposed to the gas environment. Corrosive components and gas dust contained in the gas enter between the tenon and tenon through these gaps, causing corrosion of the tenon and tenon. Corrosion produces compounds. When the rotor is removed from the equipment, it is exposed to the air. The moisture in the air causes the corrosion compounds to combine with the air to form hydrated iron oxide. Oxidation increases the surface area, tightens the gap between the tenon and the mortise, and makes it difficult to disassemble the blades and diaphragm blocks. Severe corrosion can also lead to the scrapping of the main shaft, moving blades, and diaphragm blocks.

[0005] To address the problem of corrosion in the spindle tenon, rotor tenon, and diaphragm block tenon, which makes disassembly of the blades and diaphragm blocks difficult, improvements to the existing rotor structure are necessary. Utility Model Content

[0006] The purpose of this utility model is to provide a corrosion-resistant axial tenon and groove rotor structure, which solves the problem that the tenon and groove of the existing axial tenon and groove rotor structure cannot be sealed, causing the components in the gas to corrode the tenon and groove and the tenon, resulting in the difficulty of disassembly when replacing blades and the easy corrosion of the main shaft tenon and groove.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A corrosion-resistant axial tenon-groove rotor structure includes a main shaft hub, a first-stage moving blade, a partition block, and a second-stage moving blade. Both the first-stage and second-stage moving blades include a tenon section and a blade body section. The tenon sections of the first-stage and second-stage moving blades are axially mounted within the tenon groove of the main shaft hub. The partition block is connected to the main shaft hub via its tenon section and is positioned between the first-stage and second-stage moving blades. Sealing grooves are provided on both sides of the tenon section of the moving blade along the axial direction, and sealing grooves are also provided around the tenon section of the partition block. Polytetrafluoroethylene (PTFE) tubing is installed at the sealing grooves. Baffle sealing structures are also provided at both ends of the main shaft hub.

[0009] This application designs sealing grooves at the tenon sections of the moving blades and diaphragm blocks, and sealing baffles at both ends of the main shaft hub, to block the gas passing through the rotor during operation from the tenon grooves. This prevents the rotor tenon grooves, moving blade tenons, and diaphragm block tenons from being damaged by the corrosive gases contained in the gas. It effectively solves the problem of the difficulty in removing the blades when replacing them, protects the precision of the main shaft tenon grooves, and achieves excellent economic efficiency.

[0010] As a further preferred embodiment of this utility model, the axial direction of the secondary moving blade is positioned by a stop pin, and the positioning structure of the secondary moving blade is used to restrict the movement of the secondary moving blade to the outside of the main shaft hub in the axial direction.

[0011] The first partition block installed on the main shaft hub is 20-30mm away from the secondary moving blade. When installing the second partition block, a sealing tube is inserted into the sealing groove in the axial direction. After installing each partition block in the above way, the two ends of each partition block are flush. A sealing tube is inserted into the sealing groove at both ends of the partition block. Each partition block is gradually pushed towards the secondary moving blade and pressed tightly. The gap between the partition block and the tenon of the partition block is sealed by the inserted sealing tube, thereby achieving the sealing between the tenon of the partition block and the circumference of the tenon groove of the main shaft hub, and the sealing between the partition block and the tenon of the secondary moving blade.

[0012] As a further preferred embodiment of this utility model, the first-stage moving blade is positioned by a stop pin in the direction of the axis towards the second-stage moving blade, and by a stop locking piece in the direction of the axis towards the first-stage moving blade.

[0013] After the first blade is installed and positioned, when installing the next blade, first insert a sealing tube into the blade sealing groove. After installing each first-stage moving blade in the above way, the gap between the tenon sections of the first-stage moving blades is sealed by the inserted sealing tube, thereby achieving the sealing between the tenon section of the first-stage moving blade and the circumference of the main shaft hub tenon groove, and the sealing between the first-stage moving blade and the tenon section of the partition blade block. The stop lock plate installed on each first-stage moving blade is bent and locked.

[0014] As a further preferred embodiment of this utility model, the baffle sealing structure is connected to the main shaft hub by bolts and locking plates.

[0015] As a further preferred embodiment of this utility model, the side of the baffle sealing structure facing the moving blade is also provided with a sealing groove, and a polytetrafluoroethylene rubber tube is installed in the sealing groove.

[0016] As a further preferred embodiment of this utility model, the baffle sealing structure has two sealing grooves on the side facing the moving blade, which are respectively arranged on the upper part and the lower part of the baffle sealing structure.

[0017] The double-layer sealing structure provides better sealing performance.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] 1. This application designs sealing grooves at the tenon sections of the moving blades and the partition blade blocks, and designs sealing baffles at both ends of the main shaft hub to block the gas passing through the rotor during operation outside the tenon grooves. This prevents the rotor tenon grooves, the tenons of the moving blades, and the tenons of the partition blade blocks from being damaged by the corrosive gases contained in the gas. This effectively solves the problem of the difficulty in removing the blades when replacing them, protects the precision of the main shaft tenon grooves, and achieves excellent economic efficiency.

[0020] 2. When installing the first partition block on the main shaft hub, leave a 20-30mm gap between it and the secondary moving blade. When installing the second partition block, insert a sealing tube into the sealing groove in the axial direction. Install each partition block in the above manner, with both ends of each partition block flush. Insert a sealing tube into the sealing groove at both ends of the partition block and gradually push each partition block towards the secondary moving blade to fit tightly. The gap between the partition block and the tenon of the partition block is sealed by the inserted sealing tube, thereby achieving the sealing between the tenon of the partition block and the circumference of the tenon groove of the main shaft hub, and the sealing between the partition block and the tenon of the secondary moving blade.

[0021] 3. The double-layer sealing structure provides better sealing performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of existing technology where moving blades and partition blocks are mounted on the main shaft hub.

[0023] Figure 2 This is a schematic diagram of the structure of this utility model.

[0024] Figure 3 This is a schematic diagram of the sealing groove structure of the tenon section of the moving blade and the tenon section of the partition block of this utility model.

[0025] Figure 4 This is a schematic diagram of the sealing groove structure of the baffle sealing structure of this utility model. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used 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. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Specific Implementation

[0032] Figure 1 , Figure 2 , Figure 3 , Figure 4 A corrosion-resistant axial tenon-groove rotor structure is shown, including a main shaft hub 6, a first-stage moving blade 1, a partition block 3, and a second-stage moving blade 2. Both the first-stage and second-stage moving blades 1 and 2 include a tenon section and a blade body section. The tenon sections of the first-stage and second-stage moving blades 1 and 2 are axially mounted in the tenon groove 7 of the main shaft hub 6. The partition block 3 is connected to the main shaft hub 6 via its tenon section and is mounted between the first-stage and second-stage moving blades 1 and 2. The structure is characterized by: sealing grooves 14 on both sides of the tenon section of the moving blade along the axial direction; sealing grooves 14 also exist around the tenon section of the partition block; polytetrafluoroethylene (PTFE) tubing 8 is installed at the sealing grooves 14; and baffle sealing structures 9 are provided at both ends of the main shaft hub 6. Specific Implementation

[0033] This embodiment further describes the secondary moving blade 2 based on specific embodiment 1. The axial direction of the secondary moving blade 2 is positioned by the stop pin 4. The positioning structure of the secondary moving blade 2 is used to restrict the movement of the secondary moving blade 2 to the outside of the main shaft hub 6 in the axial direction. Specific Implementation

[0034] This embodiment further describes the first-stage moving blade 1 based on specific embodiment 2. The first-stage moving blade 1 is also positioned by the stop pin 4 in the direction of the axis towards the second-stage moving blade 2, and is positioned by the stop locking piece 5 in the direction of the axis towards the first-stage moving blade 1. Specific Implementation

[0035] This embodiment further describes the baffle sealing structure 9 based on specific embodiment 1. The baffle sealing structure 9 is connected to the main shaft hub 6 by bolts 10 and locking plates 11. Specific Implementation

[0036] This embodiment further describes the baffle sealing structure 9 based on specific embodiment 4. The baffle sealing structure 9 is provided with a sealing groove 14 on the side facing the moving blade, and a polytetrafluoroethylene tube 8 is installed in the sealing groove 14. Specific Implementation

[0037] This embodiment further describes the baffle sealing structure 9 based on specific embodiment 5. The baffle sealing structure 9 has two sealing grooves 14 on the side facing the moving blade, which are respectively arranged on the upper part and the lower part of the baffle sealing structure 9.

[0038] This application designs sealing grooves at the tenon sections of the moving blades and diaphragm blocks, and sealing baffles at both ends of the main shaft hub, to block the gas passing through the rotor during operation from the tenon grooves. This prevents the rotor tenon grooves, moving blade tenons, and diaphragm block tenons from being damaged by the corrosive gases contained in the gas. It effectively solves the problem of the difficulty in removing the blades when replacing them, protects the precision of the main shaft tenon grooves, and achieves excellent economic efficiency.

[0039] The first partition block installed on the main shaft hub is 20-30mm away from the secondary moving blade. When installing the second partition block, a sealing tube is inserted into the sealing groove in the axial direction. After installing each partition block in the above way, the two ends of each partition block are flush. A sealing tube is inserted into the sealing groove at both ends of the partition block. Each partition block is gradually pushed towards the secondary moving blade and pressed tightly. The gap between the partition block and the tenon of the partition block is sealed by the inserted sealing tube, thereby achieving the sealing between the tenon of the partition block and the circumference of the tenon groove of the main shaft hub, and the sealing between the partition block and the tenon of the secondary moving blade.

[0040] The double-layer sealing groove of the baffle sealing structure can improve the sealing effect.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrosion-resistant axial tenon-groove rotor structure, comprising a main shaft hub (6), a first-stage moving blade (1), a blade partition block (3), and a second-stage moving blade (2), wherein both the first-stage moving blade (1) and the second-stage moving blade (2) include a moving blade tenon section and a blade body section, the moving blade tenon sections of the first-stage moving blade (1) and the second-stage moving blade (2) are axially installed in the tenon groove (7) of the main shaft hub (6), and the blade partition block (3) is connected to the main shaft hub (6) through the blade partition block tenon section and is installed between the first-stage moving blade (1) and the second-stage moving blade (2), characterized in that: The moving blade tenon section is provided with sealing grooves (14) on both sides along the axial direction, and the partition blade tenon section is also provided with sealing grooves (14) around its perimeter. Polytetrafluoroethylene tubing (8) is installed at the sealing grooves (14), and baffle sealing structures (9) are also provided at both ends of the main shaft hub (6).

2. The corrosion-resistant axial tenon-groove rotor structure according to claim 1, characterized in that: The secondary moving blade (2) is positioned in the axial direction by a stop pin (4). The positioning structure of the secondary moving blade (2) is used to restrict the secondary moving blade (2) from moving outward of the main shaft hub (6) in the axial direction.

3. The corrosion-resistant axial tenon-groove rotor structure according to claim 2, characterized in that: The first-stage moving blade (1) is positioned by a stop pin (4) in the direction of the axis toward the second-stage moving blade (2), while the direction of the axis toward the first-stage moving blade (1) is positioned by a stop locking piece (5).

4. The corrosion-resistant axial tenon-groove rotor structure according to claim 1, characterized in that: The baffle sealing structure (9) is connected to the main shaft hub (6) by bolts (10) and locking plates (11).

5. The corrosion-resistant axial tenon-groove rotor structure according to claim 4, characterized in that: The baffle sealing structure (9) is also provided with a sealing groove (14) on the side facing the moving blade, and a polytetrafluoroethylene tube (8) is installed at the sealing groove (14).

6. The corrosion-resistant axial tenon-groove rotor structure according to claim 5, characterized in that: The baffle sealing structure (9) has two sealing grooves (14) on the side facing the moving blade, which are respectively arranged on the upper part and the lower part of the baffle sealing structure (9).

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