Device for replacing conventional steam turbine unit with high-speed steam turbine unit

Abstract

The utility model discloses a device for replacing a conventional steam turbine unit with a high-speed steam turbine unit, which comprises a mounting rack, the top of the mounting rack is fixedly connected with a steam turbine main body through bolts, and a front bearing box and a rear bearing box are respectively mounted at two ends of the steam turbine main body; a speed change mechanism is mounted at one end of the steam turbine main body and comprises a speed change gear box which is connected with a generator through a shaft body on the steam turbine main body; the fixing assembly is used for supporting the speed change gear box on the mounting frame; the positioning block is fixed to the outer wall of the speed change gear box. The turbine main body is matched with the speed change mechanism, and the speed change gear box is connected with the shaft body on the turbine main body, so that the turbine main body and the original generator can complete the replacement work of a conventional rotating speed unit and a high speed unit, the generating power of the unit is effectively improved, the economic benefit is improved, and the waste of resources is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam turbines, in particular to a device for replacing a conventional steam turbine unit with a high-speed steam turbine unit. Background Technique

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated air flow and then jets onto the blades, causing the rotor equipped with the blade row to rotate and do work externally. Steam turbines are often used for power generation in waste incineration plants.

[0003] Currently, the power of the steam turbine generator sets in use is usually between 6MW and 70MW, among which the power units of 10MW - 35MW are the most. The rotational speed of the steam turbine for waste power generation is usually the conventional rotational speed of 3000r / min. In order to improve the efficiency of the steam turbine in waste incineration power plants, existing steam turbine manufacturers have developed high-speed steam turbines for waste power generation with a rotational speed above 5000r / min. However, such an operation requires replacing the existing conventional steam turbine, which consumes a high amount of funds and causes waste of the existing conventional steam turbine, resulting in insufficient utilization of the resources of the existing conventional steam turbine. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for replacing a conventional steam turbine unit with a high-speed steam turbine unit to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A device for replacing a conventional steam turbine unit with a high-speed steam turbine unit, comprising:

[0006] An installation frame, the top of the installation frame is fixedly connected with a steam turbine main body through bolts, and a front bearing box and a rear bearing box are respectively installed at both ends of the steam turbine main body;

[0007] A speed-changing mechanism is installed at one end of the steam turbine main body, and the speed-changing mechanism comprises:

[0008] A speed-changing gearbox, the speed-changing gearbox is connected with a generator through a shaft on the steam turbine main body;

[0009] A fixing component, the fixing component is used for supporting the speed-changing gearbox on the installation frame;

[0010] A positioning block, the positioning block is fixed on the outer wall of the speed-changing gearbox, and the positioning block is used for connecting the speed-changing gearbox and the fixing component.

[0011] Preferably, the steam turbine main body comprises:

[0012] A cylinder block, the cylinder block is fixedly connected to the top of the installation frame through bolts;

[0013] A rotor, which is installed at one end of the front bearing box;

[0014] An impeller, which is installed in the inner cavity of the cylinder block;

[0015] A main shaft, the impeller is installed in the middle of the main shaft, and the rotor is installed at one end of the main shaft.

[0016] Preferably, a regulating valve for gas flow is installed on the outer wall of the cylinder block, and the main shaft is connected to the generator through a coupling.

[0017] Preferably, the speed-changing gearbox is installed at the other end of the main shaft, and a protective shell is installed at one end of the cylinder block.

[0018] Preferably, the fixing assembly includes:

[0019] A fixing frame, which is clamped at the bottom of the speed-changing gearbox;

[0020] A support frame, which is fixed at the bottom of the fixing frame, and the bottom end of the support frame is fixed to the top of the mounting frame by bolts;

[0021] A connection hole, which is opened on the side of the fixing frame;

[0022] A locking bolt, which is threadedly inserted through the side of the fixing frame, and the speed-changing gearbox is fixed in the inner cavity of the fixing frame through the locking bolt;

[0023] A positioning groove, which is opened on the side of the fixing frame.

[0024] Preferably, the positioning block is slidably inserted into the inner cavity of the adjacent positioning groove, and a connection bolt is slidably inserted into the inner cavity of the connection hole.

[0025] The technical effects and advantages of the present utility model:

[0026] Through the cooperation of the steam turbine main body and the speed-changing mechanism, the present utility model changes the original conventional operating speed of the steam turbine by connecting the speed-changing gearbox with the shaft of the steam turbine main body, enabling it to complete the replacement of the conventional speed unit and the high-speed unit with the original generator. The modification to the original conventional steam turbine unit is small, and the investment cost is low. It solves the problems of large gas consumption and low efficiency caused by selecting the conventional speed unit in the early stage of the waste power plant, effectively improves the power generation power of the unit, enhances the economic benefits, and reduces the waste of resources. Description of the Drawings

[0027] Figure 1 It is a schematic front view of the overall structure of the present utility model.

[0028] Figure 2 This is a partial cross-sectional view of the front of the overall structure of the present utility model.

[0029] Figure 3 This is a schematic diagram of the overall structure at the speed-changing gearbox of the present utility model.

[0030] In the figure: 1, mounting frame; 2, steam turbine main body; 21, cylinder block; 22, rotor; 23, impeller; 24, main shaft; 3, front bearing housing; 4, rear bearing housing; 5, regulating valve; 6, speed-changing mechanism; 61, speed-changing gearbox; 62, fixing assembly; 621, fixing frame; 622, support frame; 623, connection hole; 624, locking bolt; 625, positioning groove; 63, positioning block; 7, protective shell; 8, connection bolt. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0032] The present utility model provides a device for replacing a conventional steam turbine unit with a high-speed steam turbine unit as shown in Figures 1-3 and includes:

[0033] A mounting frame 1, the top of the mounting frame 1 is fixedly connected by bolts to a steam turbine main body 2. The steam turbine main body 2 includes: a cylinder block 21, a rotor 22, an impeller 23, and a main shaft 24. The cylinder block 21 is fixedly mounted on the top of the mounting frame 1 by bolts, enabling the mounting frame 1 to stably support the steam turbine main body 2. The impeller 23 is installed in the inner cavity of the cylinder block 21, the impeller 23 is installed in the middle of the main shaft 24, and the rotor 22 is installed at one end of the main shaft 24, facilitating the stable rotation of the main shaft 24 in the inner cavity of the cylinder block 21. And the rotation of the impeller 23 is driven by the airflow entering the inner cavity of the cylinder block 21, enabling the main shaft 24 to rotate stably. The main shaft 24 is connected to the generator through a coupling. The steam turbine main body 2 is the structure on the original conventional steam turbine unit, enabling the main shaft 24 to drive the original generator for power generation and drive use;

[0034] Furthermore, a front bearing housing 3 and a rear bearing housing 4 are respectively installed at both ends of the steam turbine main body 2. The rotor 22 is installed at one end of the front bearing housing 3, and the main shaft 24 rotates through the inner cavity of the rear bearing housing 4, enabling the stable rotation of the main shaft 24. A regulating valve 5 for gas circulation is installed on the outer wall of the cylinder block 21, enabling the adjustment of the airflow entering the inner cavity of the cylinder block 21;

[0035] Furthermore, a speed change mechanism 6 is installed at one end of the steam turbine main body 2. The speed change mechanism 6 includes: a speed change gearbox 61, a fixing component 62, and a positioning block 63. The speed change gearbox 61 is connected to a generator through a shaft on the steam turbine main body 2. The speed change gearbox 61 is installed at the other end of the main shaft 24, so that the speed change gearbox 61 is installed between the rear bearing housing 4 and the coupling, enabling the speed change gearbox 61 to drive the main shaft 24 to change the rotational speed between the steam turbine main body 2 and the generator. The fixing component 62 is used for supporting the speed change gearbox 61 on the mounting frame 1. The positioning block 63 is fixed to the outer wall of the speed change gearbox 61, and the positioning block 63 is used for connecting the speed change gearbox 61 and the fixing component 62;

[0036] Specifically, the fixing component 62 includes: a fixing frame 621, a support frame 622, a connection hole 623, a locking bolt 624, and a positioning groove 625. The fixing frame 621 has a U-shaped structure. The fixing frame 621 is clamped to the bottom of the speed change gearbox 61. The support frame 622 is fixed to the bottom of the fixing frame 621. The bottom end of the support frame 622 is fixed to the top of the mounting frame 1 through bolts, facilitating the position support of the speed change gearbox 61 through the fixing frame 621 and the support frame 622, enabling the speed change gearbox 61 to stably change the rotational speed of the main shaft 24 and the rotating shaft of the generator. The connection hole 623 is opened on the side of the fixing frame 621. The locking bolt 624 is threadedly inserted through the side of the fixing frame 621. Two locking bolts 624 are respectively threadedly inserted through both sides of the fixing frame 621. The speed change gearbox 61 is fixed to the inner cavity of the fixing frame 621 through the locking bolt 624, facilitating the improvement of the position stability of the speed change gearbox 61 through the locking bolt 624. The positioning groove 625 is opened on the side of the fixing frame 621. The positioning block 63 is slidably inserted through the inner cavity of the adjacent positioning groove 625. Four positioning blocks 63 are fixed to the outer wall of the speed change gearbox 61 in a rectangular structure. The positioning block 63 has an L-shaped structure. Through the clamping of the positioning block 63 and the inner cavity of the positioning groove 625, through the insertion and clamping of the positioning block 63 and the inner cavity of the positioning groove 625, the position stability of the speed change gearbox 61 is improved again;

[0037] Furthermore, a protective shell 7 is installed at one end of the cylinder block 21. The protective shell 7 is used for protecting the main shaft 24. A connection bolt 8 is slidably inserted through the inner cavity of the connection hole 623. The connection bolt 8 is inserted and fixed between the protective shell 7 and the generator, improving the structural stability of the protective shell 7. By using this method to replace the original conventional unit, the construction period is short, the civil engineering modification is small, the investment cost is low, the return period is fast, solving the difficulties of large gas consumption and low efficiency brought by selecting conventional speed units in the early-stage waste power plant. Increasing the steam turbine speed can effectively improve the power generation efficiency of the unit, reduce the steam consumption, enhance the economic benefits, and at the same time can achieve energy conservation and environmental protection, replacing old equipment with high-efficiency and energy-saving equipment.

[0038] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. 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 perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for replacing a conventional steam turbine unit with a high-speed steam turbine unit, comprising: A mounting frame (1), the top of the mounting frame (1) being fixedly connected to a steam turbine body (2) by means of bolts, and a front bearing box (3) and a rear bearing box (4) being respectively mounted at both ends of the steam turbine body (2); The invention is characterized in that a speed change mechanism (6) is installed at one end of the steam turbine body (2), and the speed change mechanism (6) comprises: A speed change gear box (61), wherein the speed change gear box (61) is connected to a generator via a shaft on a steam turbine body (2); A fixing assembly (62), the fixing assembly (62) being used for supporting the speed change gear box (61) on the mounting frame (1); A positioning block (63) is fixed to the outer wall of the speed change gear box (61), and the positioning block (63) is used for connecting the speed change gear box (61) and the fixing assembly (62).

2. The device for replacing a conventional steam turbine unit with a high-speed steam turbine unit according to claim 1, characterized in that: The steam turbine body (2) comprises: A cylinder body (21), wherein the cylinder body (21) is fixed to the top of the mounting frame (1) by bolts; A rotor (22), wherein the rotor (22) is mounted on one end of the front bearing box (3); An impeller (23), wherein the impeller (23) is installed in the inner cavity of the cylinder body (21); A main shaft (24), the impeller (23) is installed at the middle of the main shaft (24), and the rotor (22) is installed at one end of the main shaft (24).

3. The device for replacing a conventional steam turbine unit with a high-speed steam turbine unit according to claim 2, characterized in that: A regulating valve (5) for gas circulation is installed on the outer wall of the cylinder (21), and the main shaft (24) is connected to the generator through a coupling.

4. The device for replacing a conventional steam turbine unit with a high-speed steam turbine unit according to claim 2, characterized in that: The speed change gear box (61) is installed on the other end of the main shaft (24), and a protective shell (7) is installed on one end of the cylinder body (21).

5. The device for replacing a conventional steam turbine unit with a high-speed steam turbine unit according to claim 2, characterized in that: The fixing assembly (62) comprises: A fixing frame (621), wherein the fixing frame (621) is clamped to the bottom of the speed change gear box (61); A support frame (622), wherein the support frame (622) is fixed to the bottom of the fixing frame (621), and the bottom end of the support frame (622) is fixed to the top of the mounting frame (1) by bolts; A connecting hole (623), wherein the connecting hole (623) is provided on a side of the fixing frame (621); A locking bolt (624), wherein the locking bolt (624) is threadedly inserted and connected to the side of the fixing frame (621), and the speed change gear box (61) is fixed to the inner cavity of the fixing frame (621) through the locking bolt (624); A positioning groove (625), wherein the positioning groove (625) is provided on a side of the fixing frame (621).

6. The device for replacing a conventional steam turbine unit with a high-speed steam turbine unit according to claim 5, characterized in that: The positioning block (63) is slidably connected to the inner cavity of the adjacent positioning groove (625), and the inner cavity of the connecting hole (623) is slidably connected to a connecting bolt (8).

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