CN115773160B - Thin-wall rigidity enhancing device, steam turbine using device and using method of device - Google Patents
Thin-wall rigidity enhancing device, steam turbine using device and using method of device Download PDFInfo
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- CN115773160B CN115773160B CN202211365601.3A CN202211365601A CN115773160B CN 115773160 B CN115773160 B CN 115773160B CN 202211365601 A CN202211365601 A CN 202211365601A CN 115773160 B CN115773160 B CN 115773160B
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Abstract
The invention discloses a thin-wall rigidity reinforcing device, a steam turbine using the same and a using method thereof, and relates to the technical field of steam turbines, comprising a reinforcing device body, wherein two ends of the reinforcing device body are respectively connected with a cylinder contact block and a bearing seat contact block; the cylinder contact block comprises a cylinder contact surface which is an arc surface matched with the surface of the cylinder; the bearing seat contact block comprises a bearing seat contact surface which is an arc surface matched with the surface of the bearing seat; the reinforcing device body is provided with a load adjusting device which can provide load for two ends of the reinforcing device body. The thin-wall rigidity enhancing device, the steam turbine using the device and the using method thereof provided by the invention adopt the thin-wall rigidity enhancing device with adjustable load and length as an external structure, and can adapt to units with different spaces and different vibration conditions; the local rigidity of the cylinder is enhanced, and the unit operation safety caused by overlarge vibration of the bearing seat is avoided.
Description
Technical Field
The invention relates to the technical field of turbines, in particular to a thin-wall rigidity reinforcing device, a turbine using the device and a using method of the turbine.
Background
In order to shorten the span of the steam turbine, part of the unit is designed with bearings on the cylinders. Because the bearing bears the rotor load and the low-pressure cylinder is welded by the thin steel plate, under the condition of high vacuum or high load, the deformation of the cylinder causes the absolute vibration of the bearing seat at the position to be large, and the normal operation of the unit is affected.
The low-pressure cylinder cannot be reinforced internally due to condition limitation in the field, the bearing seat cannot be changed to be suspended, the sensitivity of rigidity to the deformation of the cylinder cannot be changed, and the rigidity can only be reinforced externally.
Because the cylinder pre-loading position is conical, the bearing seat is cylindrical, the on-site installation is inconvenient, and the contact area is limited. If the contact area is too small, local deformation of the thin wall can result. Therefore, there is an urgent need to design a rigidity enhancing device which can conveniently adjust the moment and the length and can conveniently adjust the length and be convenient to install.
Disclosure of Invention
The invention aims at: aiming at the problems, the invention provides the thin-wall rigidity enhancing device, the steam turbine using the device and the use method thereof, and the thin-wall rigidity enhancing device is adopted as an external structure, so that the device is not influenced by the operation of the unit, and meanwhile, the load and the length of the thin-wall rigidity enhancing device can be adjusted, so that the device can adapt to the units with different spaces and different vibration conditions; the external thin-wall rigidity reinforcing device is used for reinforcing the local rigidity of the cylinder, so that the running safety of the unit caused by overlarge vibration of the bearing seat is avoided.
The technical scheme adopted by the invention is as follows:
The thin-wall rigidity reinforcing device comprises a reinforcing device body, wherein two ends of the reinforcing device body are respectively connected with a cylinder contact block and a bearing seat contact block; the cylinder contact block comprises a cylinder contact surface which is an arc surface matched with the surface of the cylinder; the bearing seat contact block comprises a bearing seat contact surface which is an arc surface matched with the surface of the bearing seat; the reinforcing device body is provided with a load adjusting device which can provide load for two ends of the reinforcing device body.
By adopting the technical scheme, the cambered surface structure can improve the fitting degree, ensure that the thin-wall rigidity reinforcing device serving as an external structure can be matched with the bearing seat and the cylinder, reinforce the local rigidity of the cylinder and avoid the running safety of the unit caused by overlarge vibration of the bearing seat.
Further, the cylinder contact block is hinged with the reinforcing device body, and the cylinder contact block can rotate relative to the reinforcing device body; the bearing seat contact block is hinged with the reinforcing device body, and can rotate relative to the reinforcing device body.
Further, the reinforcing device body is provided with a length adjusting device capable of adjusting the length of the reinforcing device body.
Further, the length adjusting device comprises a size adjusting structure and a fine adjusting structure; the size adjusting structure comprises a replacing part and a mounting part, wherein two ends of the replacing part are detachably connected to the reinforcing device body through the mounting part; the fine adjustment structure can adjust the relative distance between the cylinder contact block and the bearing seat contact block.
By adopting the technical scheme, the distance between the cylinder and the bearing seat can be predicted, and the replacement part with proper size can be selected according to the distance, so that the invention can adapt to units with different space conditions, and the auxiliary adjustment of the length is carried out through the fine adjustment structure, so that the two ends of the reinforcing device body are respectively attached to the cylinder and the bearing seat.
Further, the fine adjustment structure is arranged on the screw rod section of the reinforcing device body and a movable section matched with the screw rod section, the movable section can move along the screw rod section, and the movable section is detachably connected with the screw rod section through a second locking nut.
By adopting the technical scheme, the length of the reinforcing device body can be finely adjusted by rotating the movable section, and the adjusting mode is simple.
Further, one end of the load adjusting device is a limiting end, the other end of the load adjusting device is an adjusting end, the limiting end limits the position of the load adjusting device on the reinforcing device body, the adjusting end comprises a load adjusting nut and a first locking nut, the load adjusting nut can act on a spring in the load adjusting device, load adjustment is carried out by controlling the compression amount of the spring, and the first locking nut can limit the load adjusting nut; the limiting end can be a limiting shaft shoulder or a limiting nut.
Further, the bearing seat contact surface and/or the cylinder contact surface are/is covered with a flexible contact layer. Due to the adoption of the technical scheme, the rigid connection between the bearing seat contact surface and the bearing seat and between the cylinder contact surface and the cylinder is changed into flexible connection, and the attaching effect is better.
The steam turbine using the thin-wall rigidity enhancing device comprises a cylinder, a bearing seat and the thin-wall rigidity enhancing device, wherein the thin-wall rigidity enhancing device is arranged between the cylinder and the bearing seat and comprises a enhancing device body, and two ends of the enhancing device body are respectively connected with a cylinder contact block and a bearing seat contact block; the cylinder contact block comprises a cylinder contact surface which is an arc surface matched with the surface of the cylinder; the bearing seat contact block comprises a bearing seat contact surface which is an arc surface matched with the surface of the bearing seat; the reinforcing device body is provided with a load adjusting device which can provide load for the two ends of the reinforcing device body; the cylinder contact block is fixed on the cylinder surface through a fixing piece, and the bearing seat contact block is fixed on the bearing seat surface through a fixing piece.
Further, a plurality of the thin-walled rigidity reinforcing apparatuses are arranged circumferentially between the cylinder and the bearing housing.
Due to the adoption of the technical scheme, if the vibration of the bearing seat is large, a plurality of thin-wall rigidity enhancing devices can be arranged at the same time, and the plurality of thin-wall rigidity enhancing devices can be uniformly arranged along the circumferential direction of the bearing seat until the vibration of the bearing seat is reduced to be within a set threshold value.
The application method of the thin-wall rigidity enhancement device comprises the following steps:
Size determination: and predicting the distance between the measuring cylinder and the bearing seat, selecting a replacement part with a proper size according to the distance, and connecting two ends of the replacement part with the reinforcing device body through the mounting part to form the complete thin-wall rigidity reinforcing device.
The installation step comprises the following steps: placing a thin-wall rigidity enhancement device between a cylinder and a bearing seat, enabling a bearing seat contact block positioned at one end of an enhancement device body to correspond to the bearing seat, enabling a cylinder contact block positioned at the other end of the enhancement device body to correspond to the cylinder, enabling a bearing seat contact surface of a cambered surface structure in the bearing seat contact block to be attached to the surface of the bearing seat, fixing the bearing seat contact surface through a fixing piece, adjusting a fine adjustment structure, changing the length of the enhancement device body, enabling the cylinder contact block to be abutted to the surface of the cylinder, adjusting the angle of the cylinder contact block, enabling the cylinder contact surface of the cambered surface structure in the cylinder contact block to be attached to the surface of the cylinder, and fixing the cylinder contact block on the surface of the cylinder through the fixing piece;
Load adjusting step: starting the unit, monitoring vibration of the bearing seat in real time, adjusting a load adjusting nut on the reinforcing device body, enabling the load adjusting nut to act on the load adjusting device on the reinforcing device body, enabling compression amount of a spring in the load adjusting device to change along with the load adjusting nut, stopping adjusting the load adjusting device when vibration of the bearing seat is reduced to be within a set threshold value, and limiting the load adjusting device to lock the load through a locking nut.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows: the thin-wall rigidity enhancing device is adopted as an external structure, so that the influence of the running of the unit is avoided, the load and the length of the thin-wall rigidity enhancing device can be adjusted, and the unit with different spaces and different vibration conditions can be adapted; the cambered surface structure of cylinder contact block and bearing frame contact block can improve the laminating degree, ensures as external structure's thin wall rigidity reinforcing means can match with bearing frame and cylinder, strengthens the local rigidity of cylinder, avoids the bearing frame to vibrate too greatly and leads to unit operation safety. The distance between the cylinder and the bearing seat can be predicted firstly, and the replacement part with proper size is selected according to the distance, so that the invention can adapt to units with different space conditions, and the auxiliary adjustment of the length is performed through the fine adjustment structure, so that the two ends of the reinforcing device body are respectively attached to the cylinder and the bearing seat, and the length adjustment is convenient. The rigid connection between the bearing seat contact surface and the bearing seat and between the cylinder contact surface and the cylinder is changed into flexible connection, so that the attaching effect is better. If a plurality of thin-wall rigidity reinforcing devices are arranged at the same time according to the vibration condition of the bearing seat, the vibration of the bearing seat is ensured to be reduced to be within a set threshold value.
Drawings
FIG. 1 is a schematic view of a thin-walled stiffness reinforcement apparatus of the present invention employing long-sized replacement parts;
FIG. 2 is a schematic view of the structure of the thin-walled stiffness reinforcement device of the present invention employing short-sized replacement parts;
FIG. 3 is a front view of the thin-walled stiffness enhancing apparatus of the present invention mated with a steam turbine;
FIG. 4 is a side view of a plurality of thin-walled stiffness enhancing apparatuses of the present invention mated with a steam turbine.
The marks in the figure: the device comprises a 1-cylinder contact block, a 2-adjustable hinge, a 3-limiting end, a 4-load adjusting device, a 5-load adjusting nut, a 6-first locking nut, a 7-size adjusting structure, a 701-mounting part, a 702-replacing part, an 8-second locking nut, a 9-fine adjusting structure, a 10-bearing seat contact block, a 11-cylinder and a 12-bearing seat.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The thin-wall rigidity reinforcing device comprises a reinforcing device body, wherein two ends of the reinforcing device body are respectively connected with a cylinder contact block 1 and a bearing seat contact block 10; the cylinder contact block 1 comprises a cylinder contact surface which is an arc surface matched with the surface of the cylinder 11; the bearing seat contact block 10 comprises a bearing seat contact surface which is an arc surface matched with the surface of the bearing seat 12; the reinforcing device body is provided with a load adjusting device 4 which can provide load for two ends of the reinforcing device body. Specifically, the cambered surface structure can improve the laminating degree, ensure that the thin-wall rigidity reinforcing device serving as an external structure can be matched with the bearing seat 12 and the cylinder 11, reinforce the local rigidity of the cylinder 11 and avoid the running safety of a unit caused by overlarge vibration of the bearing seat 12.
The cylinder contact block 1 is hinged with the reinforcing device body, and the cylinder contact block 1 can rotate relative to the reinforcing device body; the bearing seat contact block 10 is hinged with the reinforcing device body, and the bearing seat contact block 10 can rotate relative to the reinforcing device body.
The reinforcing device body is provided with a length adjusting device capable of adjusting the length of the reinforcing device body.
The length adjusting device comprises a size adjusting structure 7 and a fine adjusting structure 9; the size adjusting structure 7 comprises a replacing part 702 and a mounting part 701, wherein two ends of the replacing part 702 are detachably connected to the reinforcing device body through the mounting part 701; the fine adjustment structure 9 can adjust the relative distance between the cylinder contact block 1 and the bearing seat contact block 10. Specifically, the distance between the cylinder 11 and the bearing seat 12 can be predicted first, and the replacement part 702 with a proper size is selected according to the distance, so that the embodiment can adapt to units with different space conditions, and then the auxiliary adjustment of the length is performed through the fine adjustment structure 9, so as to ensure that the two ends of the reinforcing device body are respectively attached to the cylinder 11 and the bearing seat 12. Preferably, the mounting portion 701 is provided with external threads, internal threads matched with the external threads and nuts arranged on the reinforcing device body at two ends of the replacing portion 702, and the end of the replacing portion 702 is screwed into the reinforcing device body through threads and locked through the nuts, so that the mounting is completed.
The fine tuning structure 9 is a screw rod section arranged on the reinforcing device body and a movable section matched with the screw rod section, the movable section can move along the screw rod section, and the movable section is detachably connected with the screw rod section through a second locking nut 8. Specifically, the length of the reinforcing device body can be finely adjusted by rotating the movable section, and the adjusting mode is simple. Preferably, the movable segment is a pin head.
One end of the load adjusting device 4 is a limiting end 3, the other end of the load adjusting device is an adjusting end, the limiting end 3 limits the position of the load adjusting device 4 on the reinforcing device body, the adjusting end comprises a load adjusting nut 5 and a first locking nut 6, the load adjusting nut 5 can act on a spring in the load adjusting device 4, load adjustment is carried out by controlling the compression amount of the spring, and the first locking nut 6 can limit the load adjusting nut 5; the limiting end 3 is a limiting nut.
And the bearing seat contact surface and the cylinder contact surface are covered with a flexible contact layer. Specifically, the rigid connection between the bearing seat contact surface and the bearing seat 12 and the rigid connection between the cylinder contact surface and the cylinder 11 are changed into flexible connection, and the bonding effect is better.
Example 2
The steam turbine using the thin-wall rigidity enhancing device comprises a cylinder 11, a bearing seat 12 and the thin-wall rigidity enhancing device, wherein the thin-wall rigidity enhancing device is arranged between the cylinder 11 and the bearing seat 12 and comprises a enhancing device body, and two ends of the enhancing device body are respectively connected with a cylinder contact block 1 and a bearing seat contact block 10; the cylinder contact block 1 comprises a cylinder contact surface which is an arc surface matched with the surface of the cylinder 11; the bearing seat contact block 10 comprises a bearing seat contact surface which is an arc surface matched with the surface of the bearing seat 12; the reinforcing device body is provided with a load adjusting device 4 which can provide load for two ends of the reinforcing device body; the cylinder contact block 1 is fixed on the surface of the cylinder 11 through a fixing piece, and the bearing seat contact block 10 is fixed on the surface of the bearing seat 12 through a fixing piece.
Example 3
Embodiment 3 replaces the arrangement of the thin-walled rigidity reinforcing apparatus of embodiment 2, as shown in fig. 4, three of which are arranged between the cylinder 11 and the bearing housing 12 in the circumferential direction of the bearing housing 12. The spacing between two adjacent thin-wall rigidity reinforcing devices is equal. Specifically, if the vibration of the bearing housing 12 is large, a plurality of thin-wall rigidity enhancing devices may be simultaneously provided, and the plurality of thin-wall rigidity enhancing devices may be uniformly arranged along the circumferential direction of the bearing housing 12 until the vibration of the bearing housing 12 is reduced to within a set threshold.
Example 4
The application method of the thin-wall rigidity enhancement device, as shown in fig. 1-4, comprises the following steps: size determination: the distance between the cylinder 11 and the bearing seat 12 is predicted, a replacement part 702 with a proper size is selected according to the distance, and two ends of the replacement part 702 are connected with the reinforcing device body through the mounting part 701 to form a complete thin-wall rigidity reinforcing device.
The installation step comprises the following steps: placing a thin-wall rigidity enhancement device between a cylinder 11 and a bearing seat 12, enabling a bearing seat contact block 10 positioned at one end of an enhancement device body to correspond to the bearing seat 12, enabling a cylinder contact block 1 positioned at the other end of the enhancement device body to correspond to the cylinder 11, enabling a bearing seat contact surface of an arc surface structure in the bearing seat contact block 10 to be attached to the surface of the bearing seat 12, fixing the bearing seat contact surface through a fixing piece, adjusting a fine adjustment structure 9, changing the length of the enhancement device body, enabling the cylinder contact block 1 to be abutted to the surface of the cylinder 11, adjusting the angle of the cylinder contact block 1, enabling a cylinder contact surface of the arc surface structure in the cylinder contact block 1 to be attached to the surface of the cylinder 11, and fixing the cylinder contact block 1 on the surface of the cylinder 11 through a fixing piece;
Load adjusting step: starting the unit, monitoring the vibration of the bearing seat 12 in real time, adjusting the load adjusting nut 5 on the reinforcing device body, enabling the load adjusting nut 5 to act on the load adjusting device 4 on the reinforcing device body, changing the compression amount of the spring in the load adjusting device 4 along with the load adjusting nut 5, stopping adjusting the load adjusting device 4 when the vibration of the bearing seat 12 is reduced to be within a set threshold value, and limiting the load adjusting device 4 to lock the load through the locking nut.
The principles and embodiments of the present invention have been described herein with reference to specific examples, which are intended to be merely illustrative of the methods of the present invention and their core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Claims (9)
1. The thin-wall rigidity reinforcing device comprises a reinforcing device body and is characterized in that two ends of the reinforcing device body are respectively connected with a cylinder contact block and a bearing seat contact block; the cylinder contact block comprises a cylinder contact surface which is an arc surface matched with the surface of the cylinder; the bearing seat contact block comprises a bearing seat contact surface which is an arc surface matched with the surface of the bearing seat; the reinforcing device body is provided with a load adjusting device which can provide load for the two ends of the reinforcing device body; the cylinder contact block is hinged with the reinforcing device body and can rotate relative to the reinforcing device body; the bearing seat contact block is hinged with the reinforcing device body, and can rotate relative to the reinforcing device body.
2. The thin-walled rigidity reinforcement according to claim 1, wherein the reinforcement body is provided with length adjusting means for adjusting the length of the reinforcement body.
3. The thin-walled rigidity reinforcement of claim 2, wherein the length adjustment means comprises a size adjustment structure and a fine adjustment structure; the size adjusting structure comprises a replacing part and a mounting part, wherein two ends of the replacing part are detachably connected to the reinforcing device body through the mounting part; the fine adjustment structure can adjust the relative distance between the cylinder contact block and the bearing seat contact block.
4. The thin-wall rigidity reinforcing apparatus according to claim 3, wherein the fine adjustment structure is a screw section provided to the reinforcing apparatus body, and a movable section mated with the screw section, the movable section being movable along the screw section, the movable section being detachably connected with the screw section by a second lock nut.
5. The thin-walled stiffness reinforcement according to claim 1, wherein the load adjuster has a limit end at one end and an adjustment end at the other end, the limit end limiting the position of the load adjuster on the reinforcement body, the adjustment end comprising a load adjuster nut operable on a spring within the load adjuster and a first lock nut operable to limit the load adjuster nut by controlling the amount of compression of the spring; the limiting end can be a limiting shaft shoulder or a limiting nut.
6. The thin-walled rigidity reinforcement of claim 1, wherein the bearing housing contact surface and/or the cylinder contact surface is covered with a flexible contact layer.
7. The steam turbine using the thin-wall rigidity enhancing device comprises a cylinder, a bearing seat and the thin-wall rigidity enhancing device, and is characterized in that the thin-wall rigidity enhancing device is arranged between the cylinder and the bearing seat and comprises a enhancing device body, and two ends of the enhancing device body are respectively connected with a cylinder contact block and a bearing seat contact block; the cylinder contact block comprises a cylinder contact surface which is an arc surface matched with the surface of the cylinder; the bearing seat contact block comprises a bearing seat contact surface which is an arc surface matched with the surface of the bearing seat; the reinforcing device body is provided with a load adjusting device which can provide load for the two ends of the reinforcing device body; the cylinder contact block is fixed on the surface of the cylinder through a fixing piece, and the bearing seat contact block is fixed on the surface of the bearing seat through a fixing piece; the cylinder contact block is hinged with the reinforcing device body and can rotate relative to the reinforcing device body; the bearing seat contact block is hinged with the reinforcing device body, and can rotate relative to the reinforcing device body.
8. The steam turbine using the thin-walled rigidity reinforcing apparatus according to claim 7, wherein a plurality of said thin-walled rigidity reinforcing apparatuses are circumferentially arranged between the cylinder and the bearing housing.
9. The application method of the thin-wall rigidity enhancing device is characterized by comprising the following steps of:
size determination: the distance between the measuring cylinder and the bearing seat is predicted, a replacement part with proper size is selected according to the distance, and two ends of the replacement part are connected with the reinforcing device body through the mounting part to form a complete thin-wall rigidity reinforcing device;
The installation step comprises the following steps: placing a thin-wall rigidity enhancement device between a cylinder and a bearing seat, enabling a bearing seat contact block positioned at one end of an enhancement device body to correspond to the bearing seat, enabling a cylinder contact block positioned at the other end of the enhancement device body to correspond to the cylinder, enabling a bearing seat contact surface of a cambered surface structure in the bearing seat contact block to be attached to the surface of the bearing seat, fixing the bearing seat contact surface through a fixing piece, adjusting a fine adjustment structure, changing the length of the enhancement device body, enabling the cylinder contact block to be abutted to the surface of the cylinder, adjusting the angle of the cylinder contact block, enabling the cylinder contact surface of the cambered surface structure in the cylinder contact block to be attached to the surface of the cylinder, and fixing the cylinder contact block on the surface of the cylinder through the fixing piece;
the load adjusting step starts the unit, vibration of the bearing seat is monitored in real time, the load adjusting nut on the reinforcing device body is adjusted, the load adjusting nut acts on the load adjusting device on the reinforcing device body, the compression amount of the spring in the load adjusting device is changed along with the load adjusting nut, when the vibration of the bearing seat is reduced to be within a set threshold value, the load adjusting device is stopped to be adjusted, and the load adjusting device is limited by the locking nut to lock the load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211365601.3A CN115773160B (en) | 2022-10-31 | 2022-10-31 | Thin-wall rigidity enhancing device, steam turbine using device and using method of device |
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| CN202211365601.3A CN115773160B (en) | 2022-10-31 | 2022-10-31 | Thin-wall rigidity enhancing device, steam turbine using device and using method of device |
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| CN115773160B true CN115773160B (en) | 2024-06-04 |
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| 1050 MW超超临界汽轮机轴承振动故障的处理;何剑峰, 钱振鑫;设备管理与维修;20180306(第5期);第120-122页 * |
| 接触刚度和热平衡对汽轮机的影响及对策;刘杰;范志雄;丁兆田;丁书东;;石油化工设备技术;20200515(第03期);第50-55页 * |
| 汽轮发电机组安装控制与振动预防;刘冰;刘佳;周建宇;;核标准计量与质量;20191215(第04期);第28-34页 * |
| 超超临界1000MW空冷汽轮机低压缸刚性研究;方宇;刘东旗;徐琼鹰;章艳;;东方汽轮机;20130325(第01期);第1-4页 * |
| 超超临界百万机组不稳定振动故障分析与处理;何斌;袁永强;郭勇;张泽滨;;东方汽轮机;20180325(第01期);第80-84页 * |
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| Publication number | Publication date |
|---|---|
| CN115773160A (en) | 2023-03-10 |
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