Turning gear for steam turbine rotor

Abstract

The utility model discloses a steam turbine rotor turning gear, and relates to the technical field of steam turbine maintenance, the device comprises a mounting base, a first bearing assembly, a second bearing assembly, a transmission shaft, a turning driving gear, a fastener, a wrench socket and a ratchet socket wrench; the first bearing assembly and the second bearing assembly are symmetrically installed on the two sides of the installation base, the two ends of the transmission shaft are in transmission connection with the first bearing assembly and the second bearing assembly respectively, the turning drive gear sleeves the transmission shaft, and the wrench sleeve sleeves the end, close to the first bearing assembly, of the transmission shaft. A square driving head of the ratchet socket wrench is used for being connected to a wrench socket in a sleeving mode, and a threaded hole corresponding to a fastener is formed in the mounting base. The turning drive gear is used for being in meshed connection with a rotor large gear of the steam turbine. Through the arrangement, the problems of gear damage and bearing box split surface damage caused by using a crow bar can be avoided, and the device has the advantages of being small in investment, convenient to install and easy to operate.

Description

Technical Field

[0001] This application relates to the field of steam turbine maintenance technology, and in particular to a steam turbine rotor turning gear. Background Technology

[0002] During the installation or maintenance of steam turbine rotors, manual rotation is usually required for data measurement and rotor center adjustment. In existing technology, workers typically use a pry bar to manually rotate the turbine rotor's rotating gears. However, using a pry bar reduces the gear contact area, leading to vibration or abnormal noise when the electric rotating gear is in operation. It can also damage the rotor's rotating gears, affecting equipment stability. Furthermore, the pry bar's fulcrum is the bearing housing's split surface; long-term use can cause deformation and damage to this surface, potentially leading to lubricating oil leaks and a fire hazard. Utility Model Content

[0003] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a turbine rotor turning device that can avoid gear damage and bearing housing split surface damage caused by using pry bars, and has the advantages of low investment, convenient installation, and simple operation.

[0004] This application provides a turbine rotor turning device, including: a mounting base, a first bearing assembly, a second bearing assembly, a drive shaft, a turning drive gear, fasteners, a wrench sleeve, and a ratchet socket wrench;

[0005] The first bearing assembly and the second bearing assembly are symmetrically mounted on both sides of the mounting base. The two ends of the drive shaft are respectively connected to the first bearing assembly and the second bearing assembly. The turning gear is sleeved on the drive shaft. The wrench sleeve is sleeved on the end of the drive shaft near the first bearing assembly. The square drive head of the ratchet socket wrench is used to be sleeved on the wrench sleeve. The mounting base has a threaded hole corresponding to the fastener.

[0006] The turning gear is used to mesh with the large rotor gear of the steam turbine, and the turning gear is made of nylon. The fastener is used to connect to the bearing housing of the steam turbine through the threaded hole.

[0007] According to some embodiments of this application, there are two fasteners, and the number of threaded holes opened on the mounting base corresponds to the number of fasteners, with the two threaded holes respectively opened at both ends of the mounting base.

[0008] According to some embodiments of this application, the fastener is a pull ring bolt.

[0009] According to some embodiments of this application, the wrench socket is a hexagonal wrench socket.

[0010] According to some embodiments of this application, the first bearing assembly includes a first bearing and a first bearing housing, the first bearing housing is mounted on one end of the mounting base, the first bearing is mounted on the first bearing housing, and one end of the drive shaft is drively connected to the first bearing.

[0011] According to some embodiments of this application, the second bearing assembly includes a second bearing and a second bearing housing, the second bearing housing is mounted on the mounting base at one end away from the first bearing housing, the second bearing is mounted on the second bearing housing, and the other end of the drive shaft is drively connected to the second bearing.

[0012] In this application, the device is fixed to the turbine bearing housing using a mounting base and fasteners to ensure stable operation. The drive shaft and turning gear transmit power to the turbine rotor's large gear, enabling rotor turning operations. The first and second bearing assemblies are symmetrically installed to ensure even force distribution on the drive shaft, reducing vibration and wear. A wrench socket and ratchet socket wrench are designed for manual operation, facilitating turning operations in the absence of power or in emergencies. The turning gear is made of nylon to reduce weight, noise, and wear on the rotor's large gear. Fasteners connect the device to the bearing housing via threaded holes, ensuring the overall structural stability. This device, used for turning turbine rotors, provides support, transmission, and manual operation functions, and its symmetrical design and material selection enhance performance and reliability. This design avoids gear damage and bearing housing surface damage caused by pry bars, and offers advantages such as low investment, easy installation, and simple operation.

[0013] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0014] Additional aspects and advantages of this application will become apparent and readily understood in conjunction with the following description of the embodiments, in which:

[0015] Figure 1 This is a front view schematic diagram of a turbine rotor turning gear provided in an embodiment of this application;

[0016] Figure 2 A simplified top view of the turbine rotor turning gear provided in the embodiments of this application;

[0017] Figure 3 This is a schematic diagram showing the meshing of the turning gear drive gear and the rotor large gear in an embodiment of this application.

[0018] Figure label:

[0019] Mounting base 100, turning drive gear 110, drive shaft 111, wrench sleeve 112, first bearing seat 113, second bearing seat 114, fastener 120, threaded hole 130;

[0020] Rotor large gear 200. Detailed Implementation

[0021] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0022] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, 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 application 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 application.

[0023] In the description of this application, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0024] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0025] During the installation or maintenance of steam turbine rotors, manual rotation is usually required for data measurement and rotor center adjustment. In existing technology, workers typically use a pry bar to manually rotate the turbine rotor's rotating gears. However, using a pry bar reduces the gear contact area, leading to vibration or abnormal noise when the electric rotating gear is in operation. It can also damage the rotor's rotating gears, affecting equipment stability. Furthermore, the pry bar's fulcrum is the bearing housing's split surface; long-term use can cause deformation and damage to this surface, potentially leading to lubricating oil leaks and a fire hazard.

[0026] To address the aforementioned problems, this application proposes a turbine rotor turning device. The embodiments of this application will be further described below with reference to the accompanying drawings.

[0027] Reference Figures 1 to 3This application provides a turbine rotor turning device, including a mounting base 100, a first bearing assembly, a second bearing assembly, a drive shaft 111, a turning drive gear 110, a fastener 120, a wrench socket 112, and a ratchet socket wrench. The first and second bearing assemblies are symmetrically mounted on both sides of the mounting base 100. The two ends of the drive shaft 111 are respectively connected to the first and second bearing assemblies. The turning drive gear 110 is sleeved on the drive shaft 111. The wrench socket 112 is sleeved on the end of the drive shaft 111 near the first bearing assembly. The square drive head of the ratchet socket wrench is used to engage with the wrench socket 112. The mounting base 100 has a threaded hole 130 corresponding to the fastener 120. The turning drive gear 110 is used to mesh with the turbine rotor gear 200, and the turning drive gear 110 is made of nylon. The fastener 120 is used to connect to the turbine bearing housing through the threaded hole 130.

[0028] It should be noted that this application uses fasteners 120 to fix the turbine bearing housing to the split surface, and uses a ratchet socket wrench to transmit torque and complete the turning operation of the turbine rotor. Using the ratchet wrench clockwise, the drive shaft 111 is turned through the wrench socket 112. The drive shaft 111 drives the turning drive gear 110 to rotate. The turning drive gear 110 meshes with the rotor gear 200, thus driving the rotor gear 200 to rotate. In other words, torque is transmitted to the turbine rotor through gear transmission, causing it to rotate clockwise. Continuing to turn the ratchet wrench continues until the desired turning purpose is achieved.

[0029] In this application, the device is fixed to the turbine bearing housing by mounting base 100 and fasteners 120 to ensure stable operation. Drive shaft 111 and turning gear 110 transmit power to the turbine rotor gear 200 to realize rotor turning operation. The first bearing assembly and the second bearing assembly are symmetrically installed to ensure uniform force on drive shaft 111 and reduce vibration and wear. Wrench socket 112 and ratchet socket wrench are designed for manual operation, which is convenient for turning in the absence of power or in emergency situations. Turning gear 110 is made of nylon material to reduce weight, reduce noise, and reduce wear on rotor gear 200. Fasteners 120 connect the device to the bearing housing through threaded holes 130 to ensure the stability of the overall structure. This device is used for turning operation of turbine rotor and has functions such as support, transmission, and manual operation. Its performance and reliability are improved through symmetrical design and material selection. This application, through this configuration, can avoid gear damage and bearing housing split surface damage caused by using pry bars, and has the advantages of low investment, convenient installation, and simple operation.

[0030] It should be noted that the size of the turning gear 110 is much smaller than the size of the turbine rotor gear 200. Nylon is a synthetic fiber with high wear resistance, heat resistance, and good lubrication properties, resulting in a low coefficient of friction, making it easier to process and produce at a lower cost. This avoids wear and damage to the turbine rotor turning gear, making it suitable for various single-cylinder turbines. If the turbine turning gear pitch is different, the corresponding gear can be replaced for operation, demonstrating its wide applicability. In the event of a malfunction in the electric turning gear, this manual turning device can be used to rotate the turbine rotor, preventing irreparable damage such as rotor bending, and ensuring long-term stable operation of the turbine.

[0031] Reference Figure 1 It is understandable that there are two fasteners 120. The number of threaded holes 130 opened on the mounting base 100 corresponds to the number of fasteners 120. The two threaded holes 130 are respectively opened at both ends of the mounting base 100.

[0032] It should be noted that by setting two fasteners 120 at both ends of the mounting base 100, the load can be evenly distributed on both sides of the base, avoiding stress concentration caused by single-point fixing. The two fasteners 120 cooperate with each other to better resist vibration or external forces and reduce the possibility of loosening. The two threaded holes 130 are respectively opened at both ends of the base to form a symmetrical structure, which helps to improve the strength and rigidity of the overall structure. The dual-point fixing can effectively prevent the base from bending or twisting under force. The two fasteners 120 form a redundant design. Even if one fastener 120 fails, the other can still provide a certain degree of fixing, improving safety. The dual-point fixing design can reduce the risk of equipment failure due to the failure of a single fastener 120.

[0033] It is understandable that fastener 120 is a pull ring bolt.

[0034] It should be noted that the pull ring bolt can not only be used as a fastener 120, but also as a lifting point, realizing multiple uses. During maintenance or repair, the equipment can be quickly disassembled using the pull ring bolt, saving time and manpower. The installation process of the pull ring bolt is simple; just screw it into the threaded hole 130, without the need for complicated tools or steps.

[0035] It should be noted that pull ring bolts are made of alloy steel or stainless steel, which have high strength and corrosion resistance, making them suitable for high loads or harsh environments. The design of pull ring bolts can effectively resist vibration and prevent loosening or falling off due to vibration.

[0036] It should be noted that the fastener 120 may also be a hexagonal bolt, a square head bolt, a T-bolt, or other types of bolts that can fasten the mounting base 100 to the bearing housing of the turbine, and is not limited to the embodiments of this application.

[0037] It is understandable that the wrench socket 112 is a hexagonal wrench socket.

[0038] It should be noted that the shape of the square drive head of the ratchet socket wrench matches the shape of the hexagonal wrench socket head. The hexagonal design allows the ratchet socket wrench to quickly align with the wrench socket head 112, reducing operation time. The ratchet socket wrench has a larger contact surface with the hexagonal wrench socket, which can evenly distribute the tightening force, avoiding bolt damage or stripping caused by uneven force, and also provides better grip, reducing the possibility of slippage during operation. The hexagonal design reduces the risk of tool slippage during operation, improving operational safety.

[0039] Reference Figures 1 to 2 It is understood that the first bearing assembly includes a first bearing and a first bearing housing 113. The first bearing housing 113 is mounted on one end of the mounting base 100, the first bearing is mounted on the first bearing housing 113, and one end of the drive shaft 111 is connected to the first bearing for transmission.

[0040] Reference Figures 1 to 2 It is understood that the second bearing assembly includes a second bearing and a second bearing housing 114. The second bearing housing 114 is mounted on the mounting base 100 at one end away from the first bearing housing 113. The second bearing is mounted on the second bearing housing 114. The other end of the drive shaft 111 is connected to the second bearing in a drive connection.

[0041] It should be noted that the first bearing assembly and the second bearing assembly are fixed to both ends of the mounting base 100 via the first bearing housing 113 and the second bearing housing 114, respectively, providing stable support for the drive shaft 111. The first bearing and the second bearing are respectively connected to both ends of the drive shaft 111 to ensure that the drive shaft 111 can rotate smoothly. Specifically, the first bearing housing 113 and the second bearing housing 114 are respectively installed at both ends of the mounting base 100 to form a symmetrical structure, so that the force on the drive shaft 111 is evenly distributed, reducing vibration and wear. The two ends of the drive shaft 111 are respectively connected to the first bearing and the second bearing to ensure that the power can be efficiently transmitted to the turning drive gear 110. The turning drive gear 110 is sleeved on the drive shaft 111 and realizes the turning operation of the rotor by meshing with the turbine rotor large gear 200. The first bearing assembly and the second bearing assembly adopt a modular design (including bearings and bearing housings), which facilitates installation, disassembly and maintenance. The bearings are fixed to the mounting base 100 by the bearing housings, which enhances the stability of the overall structure and ensures the reliability of the device during operation.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. 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.

[0043] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

[0044] Although embodiments of this application 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 this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A turbine rotor turning device, characterized in that, include: Mounting base, first bearing assembly, second bearing assembly, drive shaft, turning gear, fasteners, wrench socket and ratchet socket wrench; The first bearing assembly and the second bearing assembly are symmetrically mounted on both sides of the mounting base. The two ends of the drive shaft are respectively connected to the first bearing assembly and the second bearing assembly. The turning gear is sleeved on the drive shaft. The wrench sleeve is sleeved on the end of the drive shaft near the first bearing assembly. The square drive head of the ratchet socket wrench is used to be sleeved on the wrench sleeve. The mounting base has a threaded hole corresponding to the fastener. The turning gear is used to mesh with the large rotor gear of the steam turbine, and the turning gear is made of nylon. The fastener is used to connect to the bearing housing of the steam turbine through the threaded hole.

2. The turbine rotor turning device according to claim 1, characterized in that, There are two fasteners, and the number of threaded holes on the mounting base corresponds to the number of fasteners. The two threaded holes are respectively opened at both ends of the mounting base.

3. The turbine rotor turning device according to claim 2, characterized in that, The fastener is a pull ring bolt.

4. The turbine rotor turning device according to claim 1, characterized in that, The wrench socket is a hexagonal wrench socket.

5. The turbine rotor turning device according to claim 1, characterized in that, The first bearing assembly includes a first bearing and a first bearing housing. The first bearing housing is mounted on one end of the mounting base, the first bearing is mounted on the first bearing housing, and one end of the drive shaft is connected to the first bearing in a drive connection.

6. The turbine rotor turning device according to claim 5, characterized in that, The second bearing assembly includes a second bearing and a second bearing housing. The second bearing housing is mounted on the mounting base at one end away from the first bearing housing. The second bearing is mounted on the second bearing housing. The other end of the drive shaft is connected to the second bearing in a drive connection.

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