Synergistic turbine impeller

Abstract

The utility model discloses a synergistic turbine impeller, which relates to the technical field of turbine impellers and comprises a rotating shaft, an impeller is fixedly mounted outside the rotating shaft, blades distributed around the circumference of the impeller are fixedly mounted on the outer edge of the impeller, and the same shroud ring is fixedly mounted at one ends, far away from the impeller, of the blades. The shroud ring comprises a connecting band located at the shroud of the blade and mounting blocks fixedly mounted outside the connecting band, the number of the mounting blocks is in one-to-one correspondence with the number of the blades, and the mounting blocks are mounted at the ends of the corresponding blades; the ends of the blades are mutually connected through the mounting blocks, the outer ends of the adjacent blades are effectively prevented from being mutually clamped through outer arc blocks, the situation that the outer arc blocks loosen or fall off and affect the operation effect of the blades is avoided, and the problems that the outer arc blocks bear large centrifugal force and inertia force under high-speed rotation, the outer arc blocks are prone to falling off or being damaged, and the service life of the blades is prolonged are solved. And the operation of the steam turbine is influenced.

Description

Technical Field

[0001] The utility model belongs to the field of steam turbines and relates to impeller technology, in particular to an efficiency-enhancing steam turbine impeller. Background Art

[0002] The efficiency-enhanced steam turbine impeller is an impeller that improves the efficiency of the steam turbine by improving the blade structure and streamlined design. The efficiency-enhanced impeller usually adopts advanced three-dimensional flow field design methods to reduce flow losses and improve flow and energy conversion efficiency by optimizing the shape and angle of the blades. In addition, the efficiency-enhanced impeller can also reduce the weight of the impeller, reduce inertia losses, and increase the speed and response speed by adopting advanced materials and manufacturing processes. The application of the efficiency-enhanced steam turbine impeller can significantly improve the thermal efficiency and power output of the steam turbine and reduce fuel consumption and emissions.

[0003] In the prior art, for example, a high-efficiency steam turbine impeller provided by Chinese Patent Publication No. CN215761811U connects a plurality of blade units in series through a connecting block on the outer wall, so that the plurality of blade units can be subjected to force as a whole to enhance the stability of the blades. The airflow overflowing from the blade surface can be guided to the bottom of the adjacent blades through the airflow groove, thereby improving the utilization efficiency of the steam flow and assisting in improving the rotation of the impeller. However, the above technical solution still has the following problems:

[0004] The applicant believes that the blades are connected through adjacent connecting blocks between the blades to form an integral series of blades. However, with the use of the impeller, the outer arc blocks at the outer ends of the blades are subjected to greater centrifugal force and inertial force under high-speed rotation. Long-term use can easily cause the outer arc blocks to loosen or fall off. At the same time, it can also easily cause fatigue or even breakage between the outer arc blocks, affecting the operation of the turbine. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an efficiency-enhancing steam turbine impeller, which solves the problem that the outer arc block is subjected to large centrifugal force and inertial force under high-speed rotation, which easily causes the outer arc block to fall off or be damaged, affecting the operation of the steam turbine.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the utility model, an efficiency-enhancing steam turbine impeller is proposed, comprising a rotating shaft, an impeller is fixedly mounted on the outside of the rotating shaft, blades distributed about the circumference of the impeller are fixedly mounted on the outer edge of the impeller, a plurality of blades are fixedly mounted with the same shroud at one end away from the impeller, the shroud comprises a connecting belt located at the blade crown, and a mounting block fixedly mounted on the outside of the connecting belt, the number of the mounting blocks corresponds one-to-one to the blades, and the mounting blocks are mounted at the ends corresponding to the blades.

[0007] Preferably, two slots are formed at one end of the blade away from the impeller, and a first mounting frame and a second mounting frame are respectively mounted in the two slots.

[0008] Preferably, the card slot is in a fold line shape.

[0009] Preferably, the head ends of the first mounting bracket and the second mounting bracket are hook-shaped.

[0010] Preferably, the head ends of the first mounting frame and the second mounting frame are respectively adapted to the corresponding slots, and the sides of the tail ends of the first mounting frame and the second mounting frame facing each other are both provided with limiting slots that are engaged with the corresponding mounting blocks.

[0011] Preferably, a guide block fixedly connected to the connecting belt and parallel to the blades is provided between two adjacent mounting blocks.

[0012] Preferably, a side of the blade away from the impeller is fixedly connected to a limiting block, and the first mounting frame and the second mounting frame are both clamped with the corresponding limiting block.

[0013] Preferably, a first mounting plate and a second mounting plate are provided on both sides of the mounting block, and the first mounting frame and the second mounting frame are fixed to each other through the first mounting plate and the second mounting plate on both sides.

[0014] Preferably, a square hole for the connecting belt to pass through is formed on the ends of the first mounting plate and the second mounting plate that face each other.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By setting a belt, the belt includes a connecting belt located at the blade crown and a mounting block fixedly installed on the outside of the connecting belt. The mounting block is installed between the first mounting frame and the second mounting frame. The head ends of the first mounting frame and the second mounting frame are inserted into the corresponding slots. Finally, the belt is fixed by fixing the first mounting plate and the second mounting plate. It is convenient to install the belt on a single blade and also convenient to remove and replace a single blade. The mounting block connects the ends of multiple blades to each other, effectively avoiding the outer ends of adjacent blades from being clamped to each other through the outer arc block, so as to prevent the outer arc block from loosening or falling off, affecting the operation effect of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a partial structural diagram of the utility model belt;

[0019] Figure 3 It is an exploded structural diagram of the blade and shroud of the utility model;

[0020] Figure 4 for Figure 3 Enlarged structural diagram of point A in the middle.

[0021] The numbers in the figure represent: 1. rotating shaft; 2. impeller; 3. blade; 4. belt; 5. mounting block; 6. connecting belt; 7. guide block; 8. slot; 9. limit block; 10. first mounting bracket; 11. second mounting bracket; 12. limit slot; 13. first mounting plate; 14. second mounting plate; 15. square hole. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1 and Figure 2 As shown, an efficiency-enhancing steam turbine impeller comprises a rotating shaft 1, an impeller 2 is fixedly mounted on the outside of the rotating shaft 1, blades 3 distributed about the circumference of the impeller 2 are fixedly mounted on the outer edge of the impeller 2, a plurality of blades 3 are fixedly mounted with the same shroud 4 at one end away from the impeller 2, in order to disassemble a specific blade 3, the blade 3 and the impeller 2 are detachably connected, such as by fasteners, the shroud 4 comprises a connecting belt 6 located at the crown of the blade 3, and a mounting block 5 fixedly mounted on the outside of the connecting belt 6, there are multiple mounting blocks 5, and they correspond one to one with the blades 3, the mounting blocks 5 are mounted at the crown of the corresponding blade 3, the outer ends of the plurality of blades 3 are connected by the same mounting block 5, thereby connecting the outside of the blade 3, effectively avoiding the outer ends of adjacent blades 3 from being clamped to each other through the outer arc blocks, so as to prevent the outer arc blocks from loosening or falling off.

[0024] As an implementation method in this embodiment, Figure 2-Figure 4As shown, two slots 8 are provided at one end of the blade 3 away from the impeller 2, and the two slots 8 are symmetrically arranged about the axis of the blade 3, and the slots 8 are in a broken line shape. A first mounting frame 10 and a second mounting frame 11 are respectively arranged in the two slots 8, and the first mounting frame 10 and the second mounting frame 11 are hook-shaped. The head ends of the first mounting frame 10 and the second mounting frame 11 are respectively adapted to the corresponding slots 8, that is, the hook ends of the first mounting frame 10 and the second mounting frame 11 are located in the slots 8, and the first mounting frame 10 and the second mounting frame 11 are provided with a limiting groove 12 on the side facing each other at the tail ends. The limiting groove 12 is mutually engaged with the corresponding mounting block 5, and as the crown of each blade 3 is engaged with the mounting block 5, the entire shroud 4 is installed on the outer part of the blade 3, which is convenient for connecting the end of the blade 3 to improve the stability of the blade 3 during the working process, and a guide block 7 fixedly connected to the connecting belt 6 and parallel to the blade 3 is provided between two adjacent mounting blocks 5, and the guide block 7 is convenient for guiding the airflow, thereby further improving the utilization effect of the airflow.

[0025] As an implementation method in this embodiment, Figure 1 , Figure 3 and Figure 4 As shown, the side of the blade 3 away from the impeller 2 is fixedly connected to the limiting block 9, and the first mounting frame 10 and the second mounting frame 11 are both clamped with the corresponding limiting block 9 to prevent the first mounting frame 10 and the second mounting frame 11 from being misaligned relative to the blade 3. When the blade 3 is working, the head ends of the first mounting frame 10 and the second mounting frame 11 will limit the first mounting frame 10 and the second mounting frame 11 from falling out due to centrifugal force. At the same time, the first mounting frame 10 and the second mounting frame 11 will fill the card slot 8, and also effectively prevent the airflow from flowing through the card slot 8, thereby improving the utilization effect of the airflow. The first mounting plate 13 and the second mounting plate 14 are provided on both sides of the mounting block 5. The first mounting plate 13 and the second mounting plate 14 are both provided with a square hole 15 at one end facing each other, and the square hole 15 is for the connecting belt 6 to pass through. The first mounting plate 13 and the second mounting plate 14 on both sides are fixed by bolts, so that the first mounting frame 10, the second mounting frame 11 and the mounting block 5 are restricted to the blade crown of the blade 3, which is convenient for installation.

[0026] The working principle of the utility model is as follows: when in use, the staff first inserts the head end of the second mounting frame 11 into the corresponding slot 8, and the other end into the corresponding limit block 9. When the second mounting frame 11 on the blade 3 is installed, the mounting block 5 is inserted into the limit slot 12 opened by the second mounting frame 11 in turn, until the mounting blocks 5 are all installed in the corresponding limit slots 12, and then the head end of the first mounting frame 10 is inserted into the corresponding slot 8 in turn, and the tail end of the first mounting frame 10 is squeezed against the side wall of the mounting block 5, and finally the square hole 15 opened in the first mounting plate 13 and the second mounting plate 14 is aligned with the connecting belt 6, and the first mounting plate 13 and the second mounting plate 14 on both sides are fixed by bolts, so that the entire circumferential belt 4 can be installed on the blade crown of the blade 3, effectively avoiding the outer ends of adjacent blades 3 from being connected to each other through the outer arc blocks to prevent the outer arc blocks from loosening or falling off. At the same time, it is convenient to install and the corresponding blade 3 can be easily replaced.

[0027] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A high-efficiency steam turbine impeller, characterized in that: include: A rotating shaft (1), an impeller (2) is fixedly mounted on the outside of the rotating shaft (1), blades (3) distributed around the circumference of the impeller (2) are fixedly mounted on the outer edge of the impeller (2), a plurality of blades (3) are fixedly mounted on one end away from the impeller (2) with a same shroud (4), the shroud (4) comprising a connecting belt (6) located at the crown of the blade (3), and a mounting block (5) fixedly mounted on the outside of the connecting belt (6), the number of the mounting blocks (5) corresponding to the blades (3), and the mounting blocks (5) are mounted on the ends corresponding to the blades (3).

2. The efficiency-enhancing steam turbine impeller according to claim 1, characterized in that: Two slots (8) are provided at one end of the blade (3) away from the impeller (2), and a first mounting frame (10) and a second mounting frame (11) are respectively installed in the two slots (8).

3. The efficiency-enhancing steam turbine impeller according to claim 2, characterized in that: The card slot (8) is in a broken line shape.

4. The efficiency-enhancing steam turbine impeller according to claim 2, characterized in that: The head ends of the first mounting frame (10) and the second mounting frame (11) are hook-shaped.

5. The efficiency-enhancing steam turbine impeller according to claim 4, characterized in that: The head ends of the first mounting frame (10) and the second mounting frame (11) are respectively adapted to the corresponding card slots (8), and the sides of the rear ends of the first mounting frame (10) and the second mounting frame (11) facing each other are both provided with limit slots (12) for carding with the corresponding mounting blocks (5).

6. The efficiency-enhancing steam turbine impeller according to claim 1, characterized in that: A guide block (7) fixedly connected to the connection belt (6) and parallel to the blade (3) is provided between two adjacent mounting blocks (5).

7. The efficiency-enhancing steam turbine impeller according to claim 2, characterized in that: The side of the blade (3) away from the impeller (2) is fixedly connected to a limiting block (9), and the first mounting frame (10) and the second mounting frame (11) are both clamped with the corresponding limiting block (9).

8. The efficiency-enhancing steam turbine impeller according to claim 2, characterized in that: A first mounting plate (13) and a second mounting plate (14) are provided on both sides of the mounting block (5); the first mounting frame (10) and the second mounting frame (11) are fixed to each other via the first mounting plate (13) and the second mounting plate (14) on both sides.

9. The efficiency-enhancing steam turbine impeller according to claim 8, characterized in that: The first mounting plate (13) and the second mounting plate (14) are each provided with a square hole (15) at one end facing each other for the connecting belt (6) to pass through.

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