Turning gear for steam turbine rotor

Abstract

The invention 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] The present application relates to the technical field of steam turbine maintenance, and in particular to a steam turbine rotor turning device. Background Art

[0002] During the installation or maintenance of the turbine rotor, manual cranking is usually required to perform operations such as data measurement and wheel center adjustment. In the prior art, construction workers usually use a crowbar to pry the cranking gear of the turbine rotor for manual cranking. However, using a crowbar to pry the gear will reduce the gear contact area, which will cause vibration or abnormal noise when the electric cranking is put into operation, and the rotor cranking gear will also be damaged, affecting the stability of equipment operation; at the same time, the fulcrum of the crowbar is the center surface of the bearing box, and long-term use will cause deformation and damage to the center surface, which will cause lubricating oil leakage and fire hazards. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a turbine rotor turning device, which can avoid the problems of gear damage and bearing box middle surface damage caused by the use of a crowbar, and has the advantages of low investment, easy installation and simple operation.

[0004] The present application provides a turbine rotor turning device, comprising: a mounting base, a first bearing assembly, a second bearing assembly, a transmission shaft, a turning drive gear, a fastener, a wrench socket 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 transmission shaft are respectively connected to the first bearing assembly and the second bearing assembly in a transmission manner, the turning gear is sleeved on the transmission shaft, the wrench socket is sleeved on one end of the transmission shaft close to the first bearing assembly, the square drive head of the ratchet socket wrench is used to be sleeved on the wrench socket, and the mounting base is provided with a threaded hole corresponding to the fastener;

[0006] The turning gear driving gear is used for meshing connection with the rotor gear of the steam turbine, and the turning gear driving gear is made of nylon. The fastener is used for connecting to the bearing housing of the steam turbine through the threaded hole.

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

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

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

[0010] According to some embodiments of the present application, the first bearing assembly includes a first bearing and a first bearing seat. The first bearing seat is installed at one end of the mounting base, the first bearing is installed on the first bearing seat, and one end of the transmission shaft is in driving connection with the first bearing.

[0011] According to some embodiments of the present application, the second bearing assembly includes a second bearing and a second bearing seat. The second bearing seat is installed at the end of the mounting base away from the first bearing seat, the second bearing is installed on the second bearing seat, and the other end of the transmission shaft is in driving connection with the second bearing.

[0012] In the present application, through the mounting base and fasteners, the device is fixed on the bearing housing of the steam turbine to ensure its stable operation. The transmission shaft and the turning gear drive gear transmit power to the large gear of the steam turbine rotor to realize the turning operation of the rotor. The first bearing assembly and the second bearing assembly are symmetrically installed to ensure uniform stress on the transmission shaft, reduce vibration and wear. The wrench socket and the ratchet wrench are designed for manual operation, which is convenient for turning the rotor in the case of no power or emergency. The turning gear drive gear is made of nylon material, which reduces the weight, noise, and wear on the large gear of the rotor. The fasteners connect the device to the bearing housing through threaded holes to ensure the stability of the overall structure. This device is used for the turning operation of the steam turbine rotor, with functions such as support, transmission, and manual operation, and improves performance and reliability through symmetric design and material selection. Through this setting, the present application can avoid the problems of gear damage and damage to the split surface of the bearing housing caused by using a crowbar, and has the advantages of small investment, convenient installation, and simple operation.

[0013] Some additional aspects and advantages of the present application will be given in the following description, some will become obvious from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The additional aspects and advantages of the present application will become obvious and easy to understand in the description of the embodiments in conjunction with the following drawings, where:

[0015] Figure 1 is the front view schematic diagram of the steam turbine rotor turning device provided by the embodiment of the present application;

[0016] Figure 2 is the top view schematic diagram of the steam turbine rotor turning device provided by the embodiment of the present application;

[0017] Figure 3 is the schematic diagram of the engagement between the turning gear drive gear and the large gear of the rotor provided by the embodiment of the present application.

[0018] Reference numerals:

[0019] Mounting base 100, barring drive gear 110, transmission shaft 111, wrench socket 112, first bearing housing 113, second bearing housing 114, fastener 120, threaded hole 130;

[0020] Large rotor gear 200. Detailed implementation manners

[0021] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present application and should not be construed as a limitation of the present application.

[0022] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0023] In the description of the present application, if the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0024] In the description of the present application, unless otherwise clearly defined, terms such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present application in combination with the specific content of the technical solution.

[0025] During the installation or maintenance process of a steam turbine rotor, it is usually necessary to manually turn the rotor for operations such as data measurement and alignment of the coupling center. In the prior art, construction workers usually use a crowbar to pry the barring gear of the steam turbine rotor for manual barring. However, using a crowbar to pry the gear will reduce the contact area of the gear, which will in turn cause vibration or abnormal noise when the electric barring is put into operation, and the barring gear of the rotor will also be damaged, affecting the operation stability of the equipment; at the same time, the fulcrum of the crowbar is the split surface of the bearing housing, and long-term use will cause deformation and damage to the split surface, which will in turn cause lubricating oil leakage and pose a fire hazard.

[0026] To solve the above problems, the present application proposes a steam turbine rotor barring device. The embodiments of the present application will be further described below with reference to the drawings.

[0027] Refer to Figures 1 to 3, an embodiment of the present application provides a turning gear device for a steam turbine rotor, including a mounting base 100, a first bearing assembly, a second bearing assembly, a transmission shaft 111, a turning drive gear 110, a fastener 120, a wrench socket 112 and a ratchet socket wrench; the first bearing assembly and the second bearing assembly are symmetrically installed on both sides of the mounting base 100, both ends of the transmission shaft 111 are respectively in transmission connection with the first bearing assembly and the second bearing assembly, the turning drive gear 110 is sleeved on the transmission shaft 111, the wrench socket 112 is sleeved on one end of the transmission shaft 111 close to the first bearing assembly, and the square drive head of the ratchet socket wrench is used for sleeving on the wrench socket 112; a threaded hole 130 corresponding to the fastener 120 is opened on the mounting base 100; the turning drive gear 110 is used for meshing connection with the large gear 200 of the steam turbine rotor, and the manufacturing material of the turning drive gear 110 is nylon, and the fastener 120 is used for connecting to the bearing housing of the steam turbine through the threaded hole 130.

[0028] It should be noted that, in the present application, it is fixed on the middle split surface of the steam turbine bearing housing through the fastener 120, and the torque transmission is realized through the ratchet socket wrench to complete the turning operation of the steam turbine rotor. Use the ratchet wrench to turn the transmission shaft 111 clockwise through the wrench socket 112, drive the turning drive gear 110 to rotate through the transmission shaft 111, the turning drive gear 110 is meshed with the large gear 200 of the rotor, drive the large gear 200 of the rotor to rotate through the turning drive gear 110, that is, transmit the torque to the steam turbine rotor through gear transmission to make it rotate clockwise, and continuously turn the ratchet wrench until the required turning purpose is achieved.

[0029] In the present application, through the mounting base 100 and the fastener 120, the device is fixed on the bearing housing of the steam turbine to ensure its stable operation. The transmission shaft 111 and the turning drive gear 110 transmit power to the large gear 200 of the steam turbine rotor to realize the turning operation of the rotor. The first bearing assembly and the second bearing assembly are symmetrically installed to ensure uniform force on the transmission shaft 111, reduce vibration and wear. The wrench socket 112 and the ratchet socket wrench are designed for manual operation, which is convenient for turning in the case of no power or emergency. The turning drive gear 110 is made of nylon material, which reduces weight, reduces noise, and reduces wear on the large gear 200 of the rotor. The fastener 120 connects the device to the bearing housing through the threaded hole 130 to ensure the stability of the overall structure; this device is used for the turning operation of the steam turbine rotor, has functions such as support, transmission, and manual operation, and improves performance and reliability through symmetrical design and material selection. Through this setting, the present application can avoid problems such as gear damage and damage to the middle split surface of the bearing housing caused by using a crowbar, and has the advantages of small investment, convenient installation, and simple operation.

[0030] It should be noted that the size of the turning gear drive gear 110 is much smaller than the size of the turbine rotor gear 200. Nylon is a synthetic fiber that is highly wear-resistant, heat-resistant, and has good lubrication properties, making nylon have a low friction coefficient, making it more convenient to process and produce, and at a lower cost, avoiding wear and damage to the turbine rotor turning gear. It can be applied to various types of single-cylinder steam turbines. If the turbine turning gear pitch is different, the corresponding gear can be replaced for operation, and it has a wide range of applicability. In the event of a failure in the turbine electric turning gear, the turbine rotor can be rotated using this manual turning device to avoid irreparable damage such as bending of the rotor, so that the turbine can operate stably for a long period of time.

[0031] Reference Figure 1 It can be understood 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 , and the two threaded holes 130 are respectively opened at both ends of the mounting base 100 .

[0032] It should be noted that by providing two fasteners 120 at both ends of the mounting base 100, the load can be evenly distributed on both sides of the base to avoid stress concentration caused by single-point fixation. The two fasteners 120 cooperate with each other to better resist vibration or external force and reduce the possibility of loosening; 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 double-point fixation can effectively prevent the base from bending or twisting when subjected to force; the two fasteners 120 form a redundant design. Even if one of the fasteners 120 has a problem, the other can still provide a certain fixing effect to improve safety. The double-point fixation design can reduce the risk of equipment failure due to failure of a single fastener 120.

[0033] It is understood that the fastener 120 is a grommet 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, achieving multiple uses. During maintenance or overhaul, the equipment can be quickly disassembled through 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 the pull ring bolt is made of alloy steel or stainless steel, which has high strength and corrosion resistance and is suitable for high loads or harsh environments. The design of the pull ring bolt can effectively resist vibration and prevent loosening or falling off due to vibration.

[0036] It should be noted that the fastener 120 can also be a hexagon bolt, or a square head bolt, or a T-shaped bolt, or other types of bolts that can fasten the mounting base 100 to the bearing housing of the steam turbine, without being limited to the embodiments of the present application.

[0037] It can be understood that the wrench socket 112 is a hexagon wrench socket.

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

[0039] Referring to Figures 1 to 2 , it can be understood that the first bearing assembly includes a first bearing and a first bearing housing 113. The first bearing housing 113 is installed at one end of the mounting base 100, and the first bearing is installed on the first bearing housing 113. One end of the transmission shaft 111 is in transmission connection with the first bearing.

[0040] Referring to Figures 1 to 2 , it can be understood that the second bearing assembly includes a second bearing and a second bearing housing 114. The second bearing housing 114 is installed at the end of the mounting base 100 away from the first bearing housing 113, and the second bearing is installed on the second bearing housing 114. The other end of the transmission shaft 111 is in transmission connection with the second bearing.

[0041] It should be noted that the first bearing assembly and the second bearing assembly are respectively fixed to both ends of the mounting base 100 through the first bearing housing 113 and the second bearing housing 114, providing stable support for the transmission shaft 111. The first bearing and the second bearing are respectively in transmission connection with both ends of the transmission shaft 111, ensuring that the transmission 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, forming a symmetrical structure, so that the stress on the transmission shaft 111 is evenly distributed, reducing vibration and wear. Both ends of the transmission shaft 111 are respectively connected to the first bearing and the second bearing, ensuring that power can be efficiently transmitted to the turning gear 110. The turning gear 110 is sleeved on the transmission shaft 111 and meshes with the large gear 200 of the steam turbine rotor to realize the turning operation of the rotor. The first bearing assembly and the second bearing assembly adopt a modular design (including bearings and bearing housings), which is convenient for installation, disassembly and maintenance. The bearings are fixed to the mounting base 100 through the bearing housings, enhancing the stability of the overall structure and ensuring the reliability of the device during operation.

[0042] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] The above is the preferred embodiment of this application. It should be noted that for those of ordinary skill in the art, without departing from the principle of this application, several improvements and refinements can still be made, and these improvements and refinements are also regarded as the protection scope of this application.

[0044] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and purpose of this application, and the scope of this application is defined by the claims and their equivalents.

Claims

1. A steam turbine rotor turning device, characterized in that: include: Install the base, the first bearing assembly, the second bearing assembly, the transmission shaft, the turning gear, the fasteners, the wrench socket and the 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 transmission shaft are respectively connected to the first bearing assembly and the second bearing assembly in a transmission manner, the turning gear is sleeved on the transmission shaft, the wrench socket is sleeved on one end of the transmission shaft close to the first bearing assembly, the square drive head of the ratchet socket wrench is used to be sleeved on the wrench socket, and the mounting base is provided with a threaded hole corresponding to the fastener; The turning gear driving gear is used for meshing connection with the rotor gear of the steam turbine, and the turning gear driving gear is made of nylon. The fastener is used for connecting to the bearing housing of the steam turbine through the threaded hole.

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

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

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

5. The steam turbine rotor turning device according to claim 1, characterized in that: The first bearing assembly includes a first bearing and a first bearing seat. The first bearing seat is installed at one end of the mounting base. The first bearing is installed on the first bearing seat. One end of the transmission shaft is transmission-connected to the first bearing.

6. The steam turbine rotor turning device according to claim 5, characterized in that: The second bearing assembly includes a second bearing and a second bearing seat. The second bearing seat is installed on one end of the mounting base away from the first bearing seat. The second bearing is installed on the second bearing seat. The other end of the transmission shaft is transmission-connected to the second bearing.

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