CN104863968B - Bearing bush oil retainer ring of steam turbine set - Google Patents
Bearing bush oil retainer ring of steam turbine set Download PDFInfo
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- CN104863968B CN104863968B CN201410723952.6A CN201410723952A CN104863968B CN 104863968 B CN104863968 B CN 104863968B CN 201410723952 A CN201410723952 A CN 201410723952A CN 104863968 B CN104863968 B CN 104863968B
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Abstract
The invention relates to a bearing bush oil scraper ring of a turboset, which comprises an oil scraper ring inner ring, an oil scraper ring outer ring, a positioning pin, an oil scraper ring joint surface (14) and a fastening screw (7), wherein the oil scraper ring inner ring comprises an oil scraper ring inner ring upper half part (2) and an oil scraper ring inner ring lower half part (3), the oil scraper ring outer ring comprises an oil scraper ring outer ring upper half part (1) and an oil scraper ring outer ring lower half part (4), and the steam turbine set bearing bush oil scraper ring is characterized in that: the fixed connection mode of the upper half part and the lower half part of the inner ring of the oil scraper ring, namely the oil scraper ring joint surface (14), is designed into a plug-in fixed connection mode through a bolt connection fixed mode, namely, a convex shoulder groove (9) is arranged on the joint surface of the upper half part (2) of the inner ring of the oil scraper ring, a convex shoulder (12) is correspondingly arranged on the joint surface of the lower half part (3) of the inner ring of the oil scraper ring, and a positioning pin (10) for preventing circumferential rotation is arranged on the oil scraper ring joint surface (14).
Description
Technical Field
The invention relates to the technical field of steam turbines, in particular to a bearing bush oil retainer ring of a steam turbine set.
Background
At present, accidents such as overlarge vibration of a tile shaft of a turbine generator unit, abnormal sound in a bearing box, tile burning and the like caused by the problem or fault of an oil retainer ring often occur in the running of the turbine generator unit of a power generation enterprise. At present, a mechanical sealing device for bearing bushes of steam turbine generator units or large and medium-sized rotating machines at home and abroad usually adopts a sealing mode of matching a dynamic oil slinger and a static oil slinger, but because the static oil slinger is a straight cylinder, lubricating oil splashed onto the static ring cannot freely flow back to the bottom of the inner wall of a sealing end cover of the bearing bush, so that oil leakage or oil seepage often occurs at the joint of the sealing end cover and a rotating shaft; in addition, because the moving oil slinger and the static oil slinger are both steel parts, when the rotating machine vibrates, the moving oil slinger and the static oil slinger can generate serious friction and damage when the radial clearance of the shaft returns to zero or is matched with an excessively small clearance. However, investigation finds that the fracture problem or the fault of the outer ring positioning pin of the oil retainer ring during the operation of the steam turbine generator unit of a power generation enterprise often causes accidents such as overlarge vibration of a tile shaft of the unit, abnormal sound in a bearing box, tile burning and the like. For example, in the survey of running 600MW steam turbine generator units in units of power generation enterprises in China, the problems of the oil retainer ring body during running are found, the main symptoms are that a certain bearing bush of a shaft system suddenly has large axial vibration, abnormal sound in a bearing box is accompanied with metal knocking sound, the internal pressure of the bearing bush is reduced due to the breakage of the inner ring of the oil retainer ring or the falling of a fastening bolt of a joint surface of the oil retainer ring during the shutdown process, and the problem of bearing bush burning loss is easily caused during the idling process. This problem cannot be solved after several changes of the inner ring of the slinger, which means that the failure is not due to the quality of the installation. The matching depth between the oil slinger inner ring radial positioning groove and the oil slinger outer ring radial positioning pin is found to have a certain problem by measuring the matching of the bearing bush oil slinger inner ring and the oil slinger outer ring, although each power plant can take some measures and can only prolong the damage period and cannot thoroughly solve the problem. Therefore, the problem that how to solve the accidents of sudden large shaft vibration, accompanied by abnormal sound in a bearing box, tile burning and the like which often occur in the running of a steam turbine generator unit is urgently needed to be solved at present.
Disclosure of Invention
The purpose of the invention is: aiming at the problems of sudden axial vibration deflection, accompanied abnormal sound in a bearing box and the like, breakage of an inner ring of a bearing oil retainer, loosening of fastening bolts of upper and lower half-year joint surfaces of the inner ring of the oil retainer, breakage of a positioning pin of an outer ring of the oil retainer and the like which often occur in the operation of the existing machine type, further analysis, discussion and summary, the main reasons of breakage of the inner ring of the bearing oil retainer, breakage of the positioning pin, loosening of the bolts of the joint surfaces of the inner ring of the oil retainer and the like are that the radial matching position of a convex shoulder of the inner ring of the oil retainer and the positioning pin of the outer ring of the oil retainer is unreasonable, the contact part of the positioning pin of the outer ring of the oil retainer and the positioning groove of the convex shoulder of the inner ring of the oil retainer is small, the inner ring of the oil retainer is clamped at the lower part of the outer ring of the positioning pin of the, the bearing bush oil deflector ring of the steam turbine unit is designed to provide a connecting form of the inner ring combining surfaces of the oil deflector rings and a structure for assembling radial positioning pins of the oil deflector ring bodies, accurately calculate the weight of the inner ring of the oil deflector ring to properly increase the weight, has simple structure, meets design requirements, is safe to operate, and can effectively avoid accidents such as large vibration of a certain bearing bush shaft of the unit, abnormal sound in a bearing box, tile burning and the like caused by the fault of the inner ring of the oil deflector ring.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method is characterized in that: the utility model provides a turboset axle bush oil scraper ring, includes the oil scraper ring inner ring, the oil scraper ring outer loop, the locating pin, oil scraper ring faying face 14, fastening screw 7, the oil scraper ring inner ring includes first 2 of oil scraper ring inner ring and oil scraper ring inner ring lower half 3, the oil scraper ring outer loop includes first 1 of oil scraper ring outer loop and oil scraper ring outer loop lower half 4, the oil scraper ring inner ring sets up in the oil scraper ring outer loop and through fastening screw 7 fixed connection, its characterized in that: the fixed connection mode of the two joint surfaces of the upper half part 2 of the inner ring of the oil retainer and the lower half part 3 of the inner ring of the oil retainer, namely the joint surface 14 of the oil retainer is designed to be a plug-in fixed connection mode by a bolt connection fixed mode, namely, a convex shoulder groove 9 is arranged on the joint surface of the upper half part 2 of the inner ring of the oil retainer, a convex shoulder 12 is correspondingly arranged on the joint surface of the lower half part 3 of the inner ring of the oil retainer, a positioning pin 10 for preventing circumferential rotation is arranged on the joint surface 14 of the oil retainer, the connection positioning is carried out through a perforation pin 8 for preventing the positioning pin 10 from sliding off, meanwhile, the groove width of the convex shoulder groove 9 on the inner ring of the oil retainer is widened for preventing the perforation pin 8 from shearing damage.
The fixed connection mode of the two joint surfaces of the upper half part 2 of the inner ring of the oil slinger and the lower half part 3 of the inner ring of the oil slinger, namely the joint surface 14 of the oil slinger, is designed to be a splicing fixed connection mode by a bolt connection mode, so that the weight of the inner ring of the oil slinger is increased, and the weight is removed again on the basis of ensuring the strength of the oil slinger, namely, after calculating whether the oil pressure in a tile can jack up the oil slinger to form an oil film in operation, a weight removal groove 15 is arranged in the middle of the inner ring of the oil slinger, as shown in. The fixed connection mode of the upper half part and the lower half part of the inner ring of the oil deflector, namely the oil deflector joint surface 14, is designed to be a splicing fixed connection mode through a bolt connection fixed mode, so that the weight of the inner ring of the oil deflector can be increased, after the weight is removed again, the weight of the inner ring of the new bearing bush oil deflector is calculated to be heavier than that of the original oil deflector, in the specific design and production, whether the oil pressure in the bearing bush oil deflector can jack up the bearing bush oil deflector to form an oil film in the running process is checked, and the running safety of a power plant can be met on the basis of ensuring the strength of the bearing bush oil deflector through the. The weight is calculated to meet the requirement of establishing an oil film in operation, and the safety of the unit is not influenced. The influence of redesign back axle bush oil slinger inner ring weight change to unit shafting vibration is mainly in reforming transform axle bush oil slinger ring body in-process, and the change of the back weight of key solution axle bush oil slinger inner ring reforming is to the influence that the unit axle shakes, can not influence the unit axle problem of shaking at 2 kilograms within ranges after accounting, but the prerequisite is that whether the oil pressure in the axle bush can jack up the oil slinger inner ring in service, establishes good oil film. Through practice, whether the weight change of the inner ring of the oil scraper ring after the transformation can meet the requirement of establishing a stable oil film in the operation process or not can be ensured, the safe operation of the inner ring of the oil scraper ring can be ensured under the weight calculated by the designed oil group, the safe operation of the inner ring of the oil scraper ring can be ensured under the pressure of a lubricating oil main pipe of 0.1-0.14MPa, and the problem of black gold abrasion of the inner ring of the oil scraper ring can not be caused due to the weight increase. The oil scraper ring is equivalent to a narrow circular bearing due to the structural characteristics of the oil scraper ring, the operation working condition of the oil scraper ring is opposite to that of a common bearing, the common bearing is borne by a lower bearing, and the oil scraper ring is borne by an upper half. At present, the calculation of the extremely narrow bearing does not have a mature calculation method at home and abroad, and the calculation result is greatly different from the actual operation state, mainly because the oil film composition of the lubricating oil is extremely complex and the specific modeling is difficult under the condition of small width. After the oil scraper ring is machined, an installation test is carried out in an existing running unit, the vibration of a rotor, the vibration of a bearing bush, the temperature change of the bearing bush and the like are strictly detected during the test, and meanwhile, whether noise exists in a bearing box or not is monitored. After about one year of operation, the rotor shaft diameter, the bearing alloy, the oil deflector ring alloy and the like are not obviously abraded, and meanwhile, the structure of the stop pin and the ring body on the oil deflector ring is stable, so that a good oil film is established between the oil deflector ring and the rotor shaft diameter in the operation process of the unit, and the oil deflector ring works normally. In addition, the material is selected to combine the special material for the inner ring and tungsten, so that the improved bearing bush oil retainer ring of the 300MW steam turbine set is suitable for improvement, and of course, the improved bearing bush oil retainer ring of other steam turbine sets can also be used for improvement, such as the improvement of the bearing bush oil retainer ring of the 600MW steam turbine set.
The oil slinger inner ring formed by the upper half part 2 of the oil slinger inner ring and the lower half part 3 of the oil slinger inner ring is designed to adopt a shaft diameter clearance of 0.81-0.91 mm.
The beneficial effect of this technique or say that compare with prior art has the characteristics that: the device has the advantages of simple structure, safe use, convenient installation, high strength and the like. The method comprises the following steps: 1. the problems of the fracture of an inner ring of the oil deflector and the loosening strength of a connecting bolt of a joint surface are solved through design and modification; 2. the problem that the safe operation of the unit is threatened because the local vibration of a shafting of the unit exceeds the standard due to the breakage of an inner ring of an oil deflector ring and the falling of a connecting bolt of a joint surface in the operation is solved through the design and the transformation; 3. the hidden danger of unit damage and serious accidents caused by loose operation of bolts on the joint surface of the inner ring 1 of the oil deflector or excessive fragments after the inner ring of the oil deflector is suddenly broken is eliminated; 4. experiments prove that the oil deflector inner ring can establish a good oil film in operation, the dark gold cannot be abraded due to the fact that the oil film cannot be established due to weight increase, however, the oil deflector ring body is transformed by each unit, the number of the oil deflector inner ring bodies is different, the running state of each set of tiles is different, and whether problems exist needs to be verified through examination and test in a maintenance period. It is recommended to replace the whole.
Drawings
Fig. 1 is an overall front view of the present invention.
Fig. 2 is a sectional view a-a of fig. 1.
Fig. 3 is a top view of fig. 1.
Fig. 4 is a partially enlarged view D of fig. 2.
Figure 5 is a front view of the outer ring of the present invention.
Fig. 6 is a cross-sectional view of the outer ring B-B of the present invention.
Figure 7 is a cross-sectional view of the outer ring C-C of the present invention.
Fig. 8 is a front view of the inner ring of the present invention.
Fig. 9 is a right side view of the inner ring of the present invention.
Fig. 10 is a top view of the inner ring of the present invention.
Fig. 11 is a partial enlarged view of the inner ring E of the present invention.
In the figure: 1 upper half of an outer ring of the slinger (or called upper half of an outer ring of the bearing bush slinger), 2 upper half of an inner ring of the slinger (or called upper half of an inner ring of the bearing bush slinger), 3 lower half of the inner ring of the slinger (or called lower half of the inner ring of the bearing bush slinger), 4 lower half of the outer ring of the slinger (or called lower half of the outer ring of the bearing bush slinger), 5 fixing holes, 6 oil drainage holes, 7 fastening screws, 8 punching pins, 9 convex shoulder grooves (convex shoulder positioning grooves of the inner ring of the slinger), 10 positioning pins, 11 pin penetrating holes, 12 convex shoulders (convex shoulder of the inner ring of the slinger), 13 positioning pin holes, 14.
Detailed Description
The specific implementation mode of the invention, as shown in fig. 1-11, is a bearing slinger of a steam turbine unit, comprising an inner ring of the slinger, an outer ring of the slinger, a positioning pin, a combining surface 14 of the slinger, and a fastening screw 7, wherein the inner ring of the slinger comprises an upper half part 2 of the inner ring of the slinger and a lower half part 3 of the inner ring of the slinger, the outer ring of the slinger comprises an upper half part 1 of the outer ring of the slinger and a lower half part 4 of the outer ring of the slinger, the inner ring of the slinger is arranged in the outer ring of the: the fixed connection mode of the two joint surfaces of the upper half part 2 of the inner ring of the oil retainer and the lower half part 3 of the inner ring of the oil retainer, namely the joint surface 14 of the oil retainer is designed to be a plug-in fixed connection mode by a bolt connection fixed mode, namely, a convex shoulder groove 9 is arranged on the joint surface of the upper half part 2 of the inner ring of the oil retainer, a convex shoulder 12 is correspondingly arranged on the joint surface of the lower half part 3 of the inner ring of the oil retainer, a positioning pin 10 for preventing circumferential rotation is arranged on the joint surface 14 of the oil retainer, the connection positioning is carried out through a perforation pin 8 for preventing the positioning pin 10 from sliding off, meanwhile, the groove width of the convex shoulder groove 9 on the inner ring of the oil retainer is widened for preventing the perforation pin 8 from shearing damage.
The fixed connection mode of the two joint surfaces of the upper half part 2 of the inner ring of the oil slinger and the lower half part 3 of the inner ring of the oil slinger, namely the joint surface 14 of the oil slinger, is designed to be a splicing fixed connection mode by a bolt connection mode, so that the weight of the inner ring of the oil slinger is increased, and the weight is removed again on the basis of ensuring the strength of the oil slinger, namely, after calculating whether the oil pressure in a tile can jack up the oil slinger to form an oil film in operation, a weight removal groove 15 is arranged in the middle of the inner ring of the oil slinger, as shown in. The fixed connection mode of the upper half part and the lower half part of the inner ring of the oil deflector, namely the oil deflector joint surface 14, is designed to be a splicing fixed connection mode through a bolt connection fixed mode, so that the weight of the inner ring of the oil deflector can be increased, after the weight is removed again, the weight of the inner ring of the new bearing bush oil deflector is calculated to be heavier than that of the original oil deflector, in the specific design and production, whether the oil pressure in the bearing bush oil deflector can jack up the bearing bush oil deflector to form an oil film in the running process is checked, and the running safety of a power plant can be met on the basis of ensuring the strength of the bearing bush oil deflector through the. The weight is calculated to meet the requirement of establishing an oil film in operation, and the safety of the unit is not influenced. The influence of redesign back axle bush oil slinger inner ring weight change to unit shafting vibration is mainly in reforming transform axle bush oil slinger ring body in-process, and the change of the back weight of key solution axle bush oil slinger inner ring reforming is to the influence that the unit axle shakes, can not influence the unit axle problem of shaking at 2 kilograms within ranges after accounting, but the prerequisite is that whether the oil pressure in the axle bush can jack up the oil slinger inner ring in service, establishes good oil film. Through practice, whether the weight change of the inner ring of the oil scraper ring after the transformation can meet the requirement of establishing a stable oil film in the operation process or not can be ensured, the safe operation of the inner ring of the oil scraper ring can be ensured under the weight calculated by the designed oil group, the safe operation of the inner ring of the oil scraper ring can be ensured under the pressure of a lubricating oil main pipe of 0.1-0.14MPa, and the problem of black gold abrasion of the inner ring of the oil scraper ring can not be caused due to the weight increase. The oil scraper ring is equivalent to a narrow circular bearing due to the structural characteristics of the oil scraper ring, the operation working condition of the oil scraper ring is opposite to that of a common bearing, the common bearing is borne by a lower bearing, and the oil scraper ring is borne by an upper half. At present, the calculation of the extremely narrow bearing does not have a mature calculation method at home and abroad, and the calculation result is greatly different from the actual operation state, mainly because the oil film composition of the lubricating oil is extremely complex and the specific modeling is difficult under the condition of small width. After the oil scraper ring is machined, an installation test is carried out in an existing running unit, the vibration of a rotor, the vibration of a bearing bush, the temperature change of the bearing bush and the like are strictly detected during the test, and meanwhile, whether noise exists in a bearing box or not is monitored. After about one year of operation, the rotor shaft diameter, the bearing alloy, the oil deflector ring alloy and the like are not obviously abraded, and meanwhile, the structure of the stop pin and the ring body on the oil deflector ring is stable, so that a good oil film is established between the oil deflector ring and the rotor shaft diameter in the operation process of the unit, and the oil deflector ring works normally. In addition, the material is selected to combine the special material for the inner ring and tungsten, so that the improved bearing bush oil retainer ring of the 300MW steam turbine set is suitable for improvement, and of course, the improved bearing bush oil retainer ring of other steam turbine sets can also be used for improvement, such as the improvement of the bearing bush oil retainer ring of the 600MW steam turbine set.
The oil slinger inner ring formed by the upper half part 2 of the oil slinger inner ring and the lower half part 3 of the oil slinger inner ring is designed to adopt a shaft diameter clearance of 0.81-0.91 mm.
Claims (2)
1. The utility model provides a turboset axle bush oil scraper ring, including the oil scraper ring inner ring, the oil scraper ring outer loop, the locating pin, oil scraper ring faying face (14), fastening screw (7), the oil scraper ring inner ring includes first (2) of oil scraper ring inner ring and oil scraper ring inner ring lower half (3), the oil scraper ring outer loop includes first (1) of oil scraper ring outer loop and oil scraper ring outer ring lower half (4), the oil scraper ring inner ring sets up in the oil scraper ring outer loop, first (1) of oil scraper ring outer loop and oil scraper ring outer ring lower half (4) are through fastening screw (7) fixed connection, its characterized in that: the fixed connection mode of two joint surfaces of the upper half part (2) and the lower half part (3) of the inner ring of the oil slinger, namely the joint surface (14) of the oil slinger, is designed to be a splicing fixed connection mode by a bolt connection fixed mode, namely, a convex shoulder groove (9) is arranged on the joint surface of the upper half part (2) of the inner ring of the oil slinger, correspondingly, a convex shoulder (12) is arranged on the joint surface of the lower half part (3) of the inner ring of the oil slinger, and, a positioning pin (10) for preventing circumferential rotation is arranged on the oil slinger joint surface (14), the positioning pin (10) is connected and positioned through the perforation pin (8) which prevents the positioning pin (10) from sliding off, the arrangement direction of the positioning pin (10) is parallel to the axial direction of the inner ring, meanwhile, in order to prevent the shearing damage of the perforation pin (8), the groove width of a convex shoulder groove (9) on the inner ring of the oil scraper ring is widened, and the width of a convex shoulder on the combining surface of the lower half part of the inner ring of the oil scraper ring at the position of the outer ring positioning piece hole of the outer ring of the bearing bush oil scraper ring is correspondingly increased;
the fixed connection mode of two joint surfaces, namely an oil slinger joint surface (14), of the upper half part (2) and the lower half part (3) of the oil slinger inner ring is designed to be a splicing fixed connection mode through bolts, the weight of the oil slinger inner ring can be increased, the weight is removed again on the basis of ensuring the strength of the oil slinger, namely, after whether the oil pressure in a tile can jack up the oil slinger to form an oil film in operation is calculated, a weight removal groove (15) is arranged in the middle of the oil slinger inner ring.
2. A bearing liner for a steam turbine engine as defined in claim 1, wherein: the oil slinger inner ring formed by the upper half part (2) of the oil slinger inner ring and the lower half part (3) of the oil slinger inner ring is designed to adopt a shaft diameter clearance of 0.81-0.91 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410723952.6A CN104863968B (en) | 2014-12-04 | 2014-12-04 | Bearing bush oil retainer ring of steam turbine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410723952.6A CN104863968B (en) | 2014-12-04 | 2014-12-04 | Bearing bush oil retainer ring of steam turbine set |
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| Publication Number | Publication Date |
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| CN104863968A CN104863968A (en) | 2015-08-26 |
| CN104863968B true CN104863968B (en) | 2020-10-02 |
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| CN201410723952.6A Active CN104863968B (en) | 2014-12-04 | 2014-12-04 | Bearing bush oil retainer ring of steam turbine set |
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| CN106644795A (en) * | 2016-09-23 | 2017-05-10 | 上海交通大学 | Testing machine for abrasive wear test of bearing bush |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204344695U (en) * | 2014-12-04 | 2015-05-20 | 哈尔滨三源汽轮机设备制造有限责任公司 | A kind of steam turbine set bearing shell flinger ring |
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| CN2177096Y (en) * | 1993-09-16 | 1994-09-14 | 哈尔滨电站改造高新技术应用公司 | Floating oil scraper ring for steam turbine |
| CN2532298Y (en) * | 2002-04-04 | 2003-01-22 | 姚传贤 | Engineering plastics float bush for rotary slurry type hydroturbine lubricant receiver |
| JP2004360737A (en) * | 2003-06-02 | 2004-12-24 | Nsk Ltd | Rotation lock member, and bearing device provided with rotation lock member |
| US20090302543A1 (en) * | 2008-06-09 | 2009-12-10 | General Electric Company | Sealing systems for rotary machines and methods for modification |
| CN202203282U (en) * | 2011-07-16 | 2012-04-25 | 黄浩杨 | Oil ring structure |
| CN102269224A (en) * | 2011-08-01 | 2011-12-07 | 扬州尼尔工程塑料有限公司 | Bearing cover |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204344695U (en) * | 2014-12-04 | 2015-05-20 | 哈尔滨三源汽轮机设备制造有限责任公司 | A kind of steam turbine set bearing shell flinger ring |
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Inventor after: Fu Yun Jie Inventor after: Zhang Penglin Inventor after: Kang Baolai Inventor after: Wang Tao Inventor after: Cao Zhen Inventor before: Fu Yun Jie Inventor before: Liu Yuxin Inventor before: Song Jisheng Inventor before: Ma Yuanqi Inventor before: Wang Jiayong Inventor before: Fan Shijie |
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Effective date of registration: 20221128 Address after: 150038 xizha village, Xingfu Town, Xiangfang District, Harbin City, Heilongjiang Province Patentee after: Harbin Sanyuan Power Station Complete Equipment Manufacturing Co.,Ltd. Address before: 150038 Harbin Sanyuan Turbine Equipment Manufacturing Co., Ltd., Xizua Village, Xingfu Town, Xiangfang District, Harbin, Heilongjiang Patentee before: HARBIN SANYUAN TURBINE EQUIPMENT MANUFACTURING CO.,LTD. |
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