Emergency turning gear for steam turbine

Abstract

The emergency turning gear comprises a driving motor and a turning spindle, the surface of the turning spindle is rotationally sleeved with a transmission disc and a sliding sleeve seat, the transmission disc, a sleeve cylinder and a driving disc on the inner side work together, and power is transmitted through a key shaft sleeve and a friction disc. The control disc set achieves accurate friction disc control through the cylinder cover base and the lever lug, the operating rod is in sliding fit with the sliding sleeve base through the sliding lug, the contact state between the friction disc and the driving disc is adjusted, and therefore stable power connection and disconnection are achieved. According to the design of the device, the problems that a traditional turning gear is unstable in power transmission, slow in emergency response, insufficient in torque buffering and the like are solved, rapid and stable turning operation can be provided under the high-temperature, high-load and emergency states, safe and reliable operation of a steam turbine is ensured, and the device has high reliability and durability.

Description

Technical Field

[0001] This utility model relates to the field of turning gear technology, specifically to an emergency turning gear device for steam turbines. Background Technology

[0002] As a crucial piece of equipment in modern power generation, chemical engineering, and other industrial sectors, the stability and safety of steam turbine operation are vital to the efficiency and reliability of the entire system. During normal operation, the turning gear helps the steam turbine operate smoothly during startup, shutdown, and in case of malfunctions, preventing uneven rotor temperature caused by shutdown, avoiding mechanical stress and excessive wear, thereby ensuring the long-term stable operation of the steam turbine.

[0003] Traditional turbine turning gears typically rely on mechanical transmission systems for power transmission and employ a single-disc clutch to control power engagement and disengagement. However, existing technologies still have some shortcomings, particularly in terms of rapid response and reliability in emergency situations. Specific issues include:

[0004] Slow emergency response: In the event of a malfunction or equipment abnormality, traditional turning gears typically have a slow clutch disengagement operation, failing to quickly disconnect power transmission and thus increasing the risk of equipment damage. Especially in emergency situations, the lack of efficient clutch control may prevent the equipment from stopping in time, potentially causing serious equipment damage.

[0005] Lack of effective torque buffering: In traditional devices, it is difficult to effectively buffer torque fluctuations and sudden loads during power transmission, leading to excessive impact forces on friction and mechanical components. In such cases, the turning gear system may experience wear or failure due to overload.

[0006] In view of this, we will study and improve the existing problems and provide an emergency turning gear device for steam turbines to solve the current problems. The aim is to solve the problems and improve the practical value through this technology. Utility Model Content

[0007] This utility model aims to provide an emergency turning gear device for steam turbines, which solves the problems of unstable power transmission, untimely emergency response, and insufficient equipment protection in existing technologies through innovative structure and control mechanism. The specific solution is as follows:

[0008] The technical solution of this utility model includes:

[0009] The system comprises a drive motor, a turning gear spindle, a control panel assembly, and operating levers. A transmission disc and a sliding sleeve are rotatably fitted onto the surface of the turning gear spindle. A cylinder is fixedly mounted on one side of the transmission disc, and several drive discs are fitted inside the cylinder. A keyed shaft sleeve is fixedly fitted onto the surface of the turning gear spindle, and several friction discs are fitted onto the outer surface of the keyed shaft sleeve.

[0010] The control panel assembly includes a cylinder head seat fixed to one side of the cylinder and several lever lugs arranged around the outer periphery of the cylinder head seat, with push rods mounted on the lever lugs. The surfaces of the lever lugs are movably connected to the sliding sleeve seat via connecting rods. The end of the operating lever is provided with a sliding lug that slides against the surface of the sliding sleeve seat. Several drive discs and friction discs are arranged alternately and are aligned linearly along the axial direction of the key sleeve surface.

[0011] The drive motor transmits power through its output end, driving the main shaft of the turning gear to rotate, thus realizing power transmission. A transmission disc and a sliding sleeve are rotatably fitted onto the surface of the main shaft. Through the cooperation of the transmission disc and the sliding sleeve, power is transmitted to the cylinder.

[0012] Multiple drive discs are sleeved inside the cylinder. As the main shaft of the rotating disc rotates, friction contact is formed between the drive discs and the friction discs, completing the power transmission. The drive discs are made of high-temperature resistant alloy material to ensure long-term stable operation in high-temperature environments.

[0013] A keyed shaft sleeve is fixedly fitted onto the surface of the main shaft of the rotating gear, and several friction discs are fitted onto the outer surface of the keyed shaft sleeve. The friction discs, through meshing with the surface of the keyed shaft sleeve, enable the friction discs and the driving disc to rotate synchronously.

[0014] The control panel assembly forms a structural control system via the cylinder head seat and lever lugs. The lever lugs drive the push rod to contact the surfaces of the friction disc and the drive disc, thereby achieving clutch control during power transmission. The push rod is driven by the connecting rod, making the contact between the friction disc and the drive disc smoother.

[0015] The control lever slides against the surface of the sliding sleeve seat via a sliding lug, allowing for precise adjustment of the contact state between the friction disc and the drive disc. The control lever can be adjusted manually or via an electronically controlled servo motor to achieve precise control of the turning gear.

[0016] In emergency situations, the deflection of the sliding lug is controlled by the operating lever. The sliding lug causes the sliding sleeve seat to slide on the surface of the main shaft of the turning gear, controlling the friction contact between the friction disc and the driving disc. Through the cooperation of the push rod and the lever lug, a smooth connection or disconnection between the friction disc and the driving disc can be achieved, ensuring power transmission or disconnection in emergency situations and preventing equipment overload.

[0017] The beneficial effects achieved by this utility model are as follows:

[0018] 1. This utility model has greater flexibility in precisely controlling clutch engagement and disengagement. For turbine turning gears that require precise clutch adjustment in emergency situations, it can provide smooth power engagement and disengagement. By precisely controlling the clutch action, power transmission can be quickly disconnected when needed, while avoiding excessive loss and overload.

[0019] 2. In this utility model, the active disc is made of high-temperature resistant alloy material, and the friction disc is made of high-friction and wear-resistant material, ensuring that the device can operate stably in high-temperature and high-load working environments and extending the service life of the equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the cylinder sleeve according to an embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the active disk and friction disk according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the control panel assembly and operating lever structure according to one embodiment of the present invention.

[0024] Figure label:

[0025] 100. Drive motor;

[0026] 200. Rotary spindle; 210. Transmission disc; 220. Cylinder sleeve; 230. Sliding sleeve seat; 240. Key shaft sleeve; 221. Drive disc; 241. Friction disc; 300. Control disc assembly; 310. Cylinder head seat; 320. Lever lug; 330. Push rod; 321. Connecting rod; 400. Operating lever; 410. Sliding lug. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0029] The following is in conjunction with the appendix Figures 1-4 This invention describes an emergency turning gear device for a steam turbine, provided by some embodiments of the present invention.

[0030] This embodiment provides an emergency turning gear device for steam turbines. The device mainly includes a drive motor 100, a turning gear main shaft 200, a control panel assembly 300, and an operating lever 400. Through precise structural design and operational control, it enables smooth turning gear operation of the steam turbine in emergency situations, ensuring timely turning gear operation in unexpected circumstances and protecting the equipment from overload and damage.

[0031] A drive motor 100 provides a power source, driving the turning gear spindle 200 to rotate via its output end. A transmission disc 210 and a sliding sleeve 230 are rotatably fitted onto the surface of the turning gear spindle 200. A sleeve cylinder 220 is fixedly mounted on one side of the transmission disc 210, and several drive discs 221 are fitted inside the sleeve cylinder 220. During power transmission, the drive motor 100 drives the turning gear spindle 200 to rotate, thereby causing the sleeve cylinder 220 and the drive discs 221 to rotate synchronously.

[0032] A keyed shaft sleeve 240 is fixedly sleeved on the surface of the main shaft 200, and several friction discs 241 are sleeved on the surface of the keyed shaft sleeve 240. The interaction between the drive disc 221 and the friction discs 241 forms a key component for power transmission. The friction discs 241, through meshing with the surface of the keyed shaft sleeve 240, enable the drive disc 221 and the friction discs 241 to rotate synchronously, providing stable power to the main shaft.

[0033] The control panel assembly 300 includes a cylinder head seat 310 fixed to one side of the cylinder 220 and several lever lugs 320 arranged on the outer periphery of the cylinder head seat 310. Each lever lug 320 is provided with a corresponding push rod 330, which slides in contact with the surfaces of the drive disc 221 and the friction disc 241. By deflecting the operating lever 400, the lever lug 320 can drive the connecting rod 321 to deflect, thereby pushing the push rod 330 into frictional contact with the friction disc 241, further controlling the clutch action during the turning process.

[0034] The end of the operating lever 400 is provided with a sliding lug 410 that slides against the surface of the sliding sleeve seat 230. By rotating the operating lever 400, the sliding lug 410 slides against the surface of the sliding sleeve seat 230, driving the sliding sleeve seat 230 to slide along the surface of the turning gear main shaft 200, thereby achieving precise control over the frictional contact between the friction disc 241 and the drive disc 221. This control function can smoothly disconnect or engage the power transmission when needed, ensuring a rapid response during emergency turning operations.

[0035] The output end of the drive motor 100 is equipped with a bevel gear that meshes with the surface of the transmission disc 210 to ensure smooth and efficient transmission. The inner side of the sleeve cylinder 220 is equipped with a tooth groove that meshes with the outer circumference of the drive disc 221. The drive disc 221 meshes with the key sleeve 240 to ensure the smoothness and reliability of power transmission.

[0036] During the rotation process, the surfaces of the driving disc 221 and the friction disc 241 come into contact with each other through the thrust of the push rod 330. When it is necessary to switch the working state, the sliding sleeve seat 230 drives the push rod 330 to make fine adjustments, thereby changing the contact surface between the friction disc 241 and the driving disc 221, achieving smooth connection or disconnection of power. Specifically, the opposing surfaces of the friction disc 241 and the driving disc 221 are frosted to improve the friction effect, and high-temperature resistant alloys and high-friction and wear-resistant materials are selected to cope with high-temperature and high-load working environments.

[0037] The end of the turning shaft 200 is equipped with a transmission assembly for engaging with the turbine turning input end, ensuring that the turbine's turning operation is performed by rotating the turning shaft 200. This transmission assembly can precisely connect with the turbine's input end, providing the necessary emergency turning power to the turbine in case of an emergency.

[0038] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An emergency turning gear device for steam turbines, characterized in that, include: The system comprises a drive motor (100), a turning gear spindle (200), a control panel assembly (300), and an operating lever (400). A transmission disc (210) and a sliding sleeve seat (230) are rotatably fitted onto the surface of the turning gear spindle (200). A sleeve cylinder (220) is fixedly mounted on one side of the transmission disc (210). Several drive discs (221) are fitted onto the inner side of the sleeve cylinder (220). A key shaft sleeve (240) is fixedly fitted onto the surface of the turning gear spindle (200), and several friction discs (241) are fitted onto the surface of the key shaft sleeve (240). The control panel assembly (300) includes a cylinder head seat (31) fixed to one side of the sleeve cylinder (220). 0) and a plurality of lever ears (320) arranged on the outer periphery of the cylinder head seat (310). The surface of the cylinder head seat (310) is provided with a plurality of push rods (330) arranged one-to-one with the lever ears (320). The surface of the lever ears (320) is connected to a connecting rod (321), and the other end of the connecting rod (321) is movably connected to the surface of the sliding sleeve seat (230). The end of the operating rod (400) is provided with a sliding ear (410) that slides against the surface of the sliding sleeve seat (230). A plurality of the driving discs (221) and friction discs (241) are arranged in an alternating manner and are arranged in a straight line along the axial direction of the key sleeve (240).

2. The emergency turning gear device for steam turbines according to claim 1, characterized in that, The connection point between the sliding lug (410) and the operating rod (400) is offset from the axis of the operating rod (400), and the surface of the sliding sleeve seat (230) is provided with a sliding groove that is adapted to the sliding lug (410).

3. The emergency turning gear device for steam turbines according to claim 1, characterized in that, The output end of the drive motor (100) is provided with a bevel gear that meshes with the surface of the transmission disk (210). The inner side of the sleeve cylinder (220) is provided with a tooth groove that meshes with the outer periphery of the drive disk (221). The drive disk (221) is rotatably sleeved on the outer periphery of the key shaft sleeve (240).

4. The emergency turning gear device for steam turbines according to claim 1, characterized in that, The key sleeve (240) has a key ridge on its outer periphery that meshes with the inner side of the friction disk (241), and the friction disk (241) is engaged with the surface of the key sleeve (240).

5. A turbine emergency turning gear device according to claim 1, characterized in that, The push rod (330) is arranged perpendicular to the surface of the active disk (221) and the friction disk (241), and the surfaces of adjacent active disks (221) and friction disks (241) slide against each other.

6. A turbine emergency turning gear device according to claim 1, characterized in that, The active disk (221) and the friction disk (241) have frosted surfaces on their opposite sides. The active disk (221) is made of high-temperature resistant alloy material, and the friction disk (241) is made of high-friction and wear-resistant material.

7. A steam turbine emergency turning gear device according to claim 1, characterized in that, The end of the turning gear main shaft (200) is provided with a transmission component for engaging with the turbine turning gear input end, and the turbine turning gear operation is performed by rotating the turning gear main shaft (200).

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