CN110486578B - Rotating equipment foundation natural frequency adjusting device and adjusting method thereof - Google Patents
Rotating equipment foundation natural frequency adjusting device and adjusting method thereof Download PDFInfo
- Publication number
- CN110486578B CN110486578B CN201910813759.4A CN201910813759A CN110486578B CN 110486578 B CN110486578 B CN 110486578B CN 201910813759 A CN201910813759 A CN 201910813759A CN 110486578 B CN110486578 B CN 110486578B
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- screw jack
- screw
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- foundation base
- nuts
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M5/00—Engine beds, i.e. means for supporting engines or machines on foundations
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention belongs to the technical field of nuclear power station large-scale rotating equipment vibration treatment engineering, and particularly relates to a rotating equipment foundation natural frequency adjusting device and an adjusting method thereof, wherein the adjusting method comprises the following steps: the equipment foundation base, a plurality of rib plates, screw jacks, screw rods and nuts B; each screw jack comprises: the screw jack comprises a screw jack female part, a screw jack male part and a plurality of nuts A, wherein the screw jack female part and the screw jack male part are connected through the nuts A in a threaded manner; the rib plates and the screw rods are connected through the nuts B in a threaded mode to form a frame structure and are placed outside the equipment foundation base, and the screw jacks are axially installed inside the equipment foundation base.
Description
Technical Field
The invention belongs to the technical field of nuclear power station large-scale rotating equipment vibration treatment engineering, and particularly relates to a rotating equipment foundation natural frequency adjusting device and an adjusting method thereof.
Background
In the running process of the large-scale rotating equipment, the vibration level is an important technical index for verifying the running state of the equipment, if the vibration is bigger, the service life of the equipment can be reduced, the equipment is damaged to different degrees, and the safe and stable running of the corresponding equipment and the system is directly affected. Therefore, it is necessary to design a device and a method for adjusting the natural frequency of the rotating equipment foundation to improve the above technical problems.
Disclosure of Invention
The invention aims to provide a rotating equipment foundation natural frequency adjusting device and an adjusting method thereof aiming at the defects of the prior art, and the basic rigidity is adjusted in a mode of internal bracing and external pressure on the existing rotating equipment foundation, so that the natural frequency is improved, and the technical problem that the rotating equipment is far away from a resonance zone in the operation process is solved.
The technical scheme of the invention is as follows:
A rotating equipment foundation natural frequency adjustment device, comprising: the equipment foundation base, a plurality of rib plates, screw jacks, screw rods and nuts B; each screw jack comprises: the screw jack comprises a screw jack female part, a screw jack male part and a plurality of nuts A, wherein the screw jack female part and the screw jack male part are connected through the nuts A in a threaded manner; the rib plates are connected with the screw rods through nuts B in a threaded mode to form a frame structure and are placed outside the equipment foundation base, and the screw jacks are axially installed inside the equipment foundation base.
The screw jack female part is axially provided with a threaded hole; the outer radial surface of the screw jack female part is processed with a hexagon for fastening a spanner; the screw jack male part is axially provided with a screw rod and is in threaded connection with the screw jack female part; the outer radial surface of the male part of the screw jack is processed with a hexagon for fastening a spanner.
Two through holes are formed in two ends of each rib plate and used for penetrating the screw rods.
The left end face of the screw jack female part of the screw jack is tightly attached to the left side face inside the equipment foundation base, and the right end face of the screw jack male part is tightly attached to the right side face inside the equipment foundation; the screw jacks are tightened by tightening two nuts a.
The number of the rib plates and the screw rods is equal, and the number of the screw jacks is equal.
The number of the nuts A on each screw jack is two.
The adjusting method of the rotating equipment foundation natural frequency adjusting device comprises the following steps:
step one: screwing the two nuts A onto the screw rod of the screw jack male part; screwing the screw rod of the screw jack male part into the threaded hole of the screw jack female part; axially loading the assembled screw jack into the equipment foundation; tightening the screw jack until the left end face of the screw jack female part is tightly attached to the left side face inside the equipment foundation base, and the right end face of the screw jack male part is tightly attached to the right side face inside the equipment foundation base; two nuts A are fastened to fasten the screw jack.
Step two: one of the rib plates is arranged outside the left side of the equipment foundation base, so that the right end face of the rib plate is tightly attached to the left end face of the outside of the equipment foundation base; the other rib plate is arranged outside the right side of the equipment foundation base, so that the left end face of the rib plate is tightly attached to the right end face of the outside of the equipment foundation base; respectively penetrating the two screw rods into the through holes of the two rib plates; and the screw rod is screwed in through the nut B to be screwed up.
Step three: the equipment foundation base is internally supported through the screw jack, and the frame structure formed by the threaded connection of the rib plates and the screw rod is externally compressed and fixed, so that the rigidity of the equipment foundation base is effectively adjusted, the natural frequency is improved, and the resonance region is effectively kept away from.
The invention has the following beneficial effects:
[1] The rotating equipment foundation natural frequency adjusting device is simple in structure and convenient to implement;
[2] The rotating equipment basic natural frequency adjusting device can effectively keep the rotating equipment away from the resonance area.
Drawings
FIG. 1 is a schematic diagram of a basic natural frequency adjusting device of a rotating device according to the present invention;
FIG. 2 is a schematic diagram of the structure of a screw jack in a basic natural frequency adjusting device of a rotary apparatus according to the present invention
FIG. 3 is a schematic view of the structure of a reinforcing frame in a basic natural frequency adjusting device of a rotating device according to the present invention;
the device comprises a screw jack female part 1, a screw jack male part 2, a nut A3, a rib plate 4, a screw rod 5, a nut B6 and a device foundation base 7.
Detailed Description
The technology of the present invention is further described below:
as shown in fig. 1 to 3, a rotating equipment base natural frequency adjusting apparatus includes: the equipment foundation base 7, a plurality of rib plates 4, screw jacks, screw rods 5 and nuts B6; each screw jack comprises: the screw jack comprises a screw jack female part 1, a screw jack male part 2 and a plurality of nuts A3, wherein the screw jack female part 1 and the screw jack male part 2 are in threaded connection through the nuts A3; the rib plates 4 are connected with the screw rods 5 through nuts B6 in a threaded mode to form a frame structure and are placed outside the equipment foundation base 7, and the screw jacks are axially installed inside the equipment foundation base 7.
The screw jack female part 1 is axially provided with a threaded hole; the radial outer surface of the screw jack female part 1 is processed with a hexagon for fastening a spanner; the screw jack male part 2 is axially provided with a screw rod and is in threaded connection with the screw jack female part 1; the outer radial surface of the screw jack male part 2 is machined with a hexagon for wrench fastening.
Two through holes are formed in two ends of each rib plate 4 and used for penetrating the screw rods 5.
The left end face of the screw jack female part 1 of the screw jack is tightly attached to the left side face inside the equipment foundation base 7, and the right end face of the screw jack male part 2 is tightly attached to the right side face inside the equipment foundation base 7; the screw jacks are tightened by tightening two nuts A3.
The number of the rib plates 4 and the screw rods 5 is 2, and the number of the screw jacks is 4.
The number of the nuts A3 on each screw jack is two.
The adjusting method of the rotating equipment foundation natural frequency adjusting device comprises the following steps:
Step one: two nuts A3 are screwed on the screw rod of the screw jack male part 2; screwing the screw rod of the screw jack male part 2 into the threaded hole of the screw jack female part 1; axially loading the assembled screw jack into the equipment foundation 7; tightening the screw jack until the left end face of the screw jack female part 1 is tightly attached to the left side face inside the equipment foundation base 7, and the right end face of the screw jack male part 2 is tightly attached to the right side face inside the equipment foundation base 7; two nuts A3 are fastened to fasten the screw jack.
Step two: one of the rib plates 4 is arranged outside the left side of the equipment foundation base 7, so that the right end face of the rib plate 4 is tightly attached to the left end face outside the equipment foundation base 7; the other rib plate 4 is arranged outside the right side of the equipment foundation base 7, so that the left end face of the rib plate 4 is tightly attached to the right end face outside the equipment foundation base 7; two screw rods 5 are respectively penetrated into the through holes of the two rib plates 4; and the screw rod 5 is screwed in and screwed down through the nut B6.
Step three: the equipment foundation base 7 is internally supported through the screw jack, and the frame structure formed by the threaded connection of the rib plates 4 and the screw rods 5 is externally compressed and fixed, so that the rigidity of the equipment foundation base 7 is effectively adjusted, the natural frequency is improved, and the resonance region is effectively kept away from.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The invention may be practiced otherwise than as specifically described.
Claims (6)
1. A rotating equipment foundation natural frequency adjusting device, characterized by comprising: the equipment foundation base (7), a plurality of rib plates (4), screw jacks, screw rods (5) and nuts B (6); each screw jack comprises: the screw jack comprises a screw jack female part (1), a screw jack male part (2) and a plurality of nuts A (3), wherein the screw jack female part (1) and the screw jack male part (2) are in threaded connection through the nuts A (3); the rib plates (4) are connected with the screw rods (5) through nuts B (6) in a threaded mode to form a frame structure and are placed outside the equipment foundation base (7), and the screw jacks are axially installed inside the equipment foundation base (7);
the left end face of a screw jack female part (1) of the screw jack is tightly attached to the left side face inside the equipment foundation base (7), and the right end face of a screw jack male part (2) is tightly attached to the right side face inside the equipment foundation base (7); fastening the screw jack by fastening two nuts A (3);
one rib plate (4) is arranged outside the left side of the equipment foundation base (7) so that the right end surface of the rib plate (4) is tightly attached to the left end surface outside the equipment foundation base (7); the other rib plate (4) is arranged outside the right side of the equipment foundation base (7) so that the left end face of the rib plate (4) is tightly attached to the right end face outside the equipment foundation base (7); two screw rods (5) are respectively penetrated into the through holes of the two rib plates (4); and the screw rod (5) is screwed in through the nut B (6).
2. The device for adjusting the natural frequency of the foundation of the rotating equipment according to claim 1, wherein the screw jack female part (1) is axially provided with a threaded hole; the radial outer surface of the screw jack female part (1) is processed with a hexagon for fastening a spanner; the screw jack male part (2) is axially provided with a screw rod and is in threaded connection with the screw jack female part (1); the radial outer surface of the screw jack male part (2) is processed with a hexagon for fastening a spanner.
3. A rotating equipment foundation natural frequency adjusting device as defined in claim 2, wherein: two through holes are formed in two ends of each rib plate (4) and used for penetrating the screw rods (5).
4. A rotating equipment foundation natural frequency adjusting device according to claim 3, wherein: the number of the rib plates (4) and the screw rods (5) is 2, and the number of the screw jacks is 4.
5. A rotating equipment foundation natural frequency adjusting device according to claim 4, wherein: the number of the nuts A (3) on each screw jack is two.
6. A method of adjusting the fundamental natural frequency adjusting device of a rotating apparatus according to any one of claims 1 to 5, comprising the steps of:
step one: two nuts A (3) are screwed on the screw rod of the screw jack male part (2); screwing a screw rod of the screw jack male part (2) into a threaded hole of the screw jack female part (1); axially loading the assembled screw jack into the equipment foundation base (7); tightening the screw jack until the left end face of the screw jack female part (1) is tightly attached to the left side face inside the equipment foundation base (7), and the right end face of the screw jack male part (2) is tightly attached to the right side face inside the equipment foundation base (7); fastening two nuts A (3) to fasten the screw jack;
Step two: the equipment foundation base (7) is internally supported by the screw jack, and the reinforcing frame formed by the threaded connection of the rib plates (4) and the screw rods (5) is externally fastened by external pressure, so that the rigidity of the equipment foundation base (7) is effectively adjusted, the natural frequency is improved, and the resonance region is effectively kept away from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813759.4A CN110486578B (en) | 2019-08-30 | 2019-08-30 | Rotating equipment foundation natural frequency adjusting device and adjusting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910813759.4A CN110486578B (en) | 2019-08-30 | 2019-08-30 | Rotating equipment foundation natural frequency adjusting device and adjusting method thereof |
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| Publication Number | Publication Date |
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| CN110486578A CN110486578A (en) | 2019-11-22 |
| CN110486578B true CN110486578B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910813759.4A Active CN110486578B (en) | 2019-08-30 | 2019-08-30 | Rotating equipment foundation natural frequency adjusting device and adjusting method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB754943A (en) * | 1954-02-23 | 1956-08-15 | British Thomson Houston Co Ltd | Improvements relating to the mounting of large machines on a bed or seating surface |
| DE1015273B (en) * | 1953-08-19 | 1957-09-05 | Ernst Rausch Dr Ing | Method for changing the natural frequency of structures |
| JPH08128013A (en) * | 1994-11-01 | 1996-05-21 | Kajima Corp | Vibration damping device for cable stayed bridge under construction and its control method |
| JP2013100905A (en) * | 2013-01-15 | 2013-05-23 | Maeta Concrete Industry Ltd | Rack for mechanical apparatus |
| CN204068523U (en) * | 2014-08-06 | 2014-12-31 | 广东珠海金湾发电有限公司 | A kind of generator unit stator aggregation water pipe supporting structure |
| CN207437261U (en) * | 2017-05-17 | 2018-06-01 | 哈尔滨电机厂有限责任公司 | For the basic bindiny mechanism of oblique support arm upper spider hydrogenerator |
| CN109099100A (en) * | 2018-10-30 | 2018-12-28 | 石家庄铁道大学 | A kind of negative stiffness device easy to adjust |
| CN211315524U (en) * | 2019-08-30 | 2020-08-21 | 江苏核电有限公司 | Basic natural frequency adjusting device of rotating equipment |
-
2019
- 2019-08-30 CN CN201910813759.4A patent/CN110486578B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1015273B (en) * | 1953-08-19 | 1957-09-05 | Ernst Rausch Dr Ing | Method for changing the natural frequency of structures |
| GB754943A (en) * | 1954-02-23 | 1956-08-15 | British Thomson Houston Co Ltd | Improvements relating to the mounting of large machines on a bed or seating surface |
| JPH08128013A (en) * | 1994-11-01 | 1996-05-21 | Kajima Corp | Vibration damping device for cable stayed bridge under construction and its control method |
| JP2013100905A (en) * | 2013-01-15 | 2013-05-23 | Maeta Concrete Industry Ltd | Rack for mechanical apparatus |
| CN204068523U (en) * | 2014-08-06 | 2014-12-31 | 广东珠海金湾发电有限公司 | A kind of generator unit stator aggregation water pipe supporting structure |
| CN207437261U (en) * | 2017-05-17 | 2018-06-01 | 哈尔滨电机厂有限责任公司 | For the basic bindiny mechanism of oblique support arm upper spider hydrogenerator |
| CN109099100A (en) * | 2018-10-30 | 2018-12-28 | 石家庄铁道大学 | A kind of negative stiffness device easy to adjust |
| CN211315524U (en) * | 2019-08-30 | 2020-08-21 | 江苏核电有限公司 | Basic natural frequency adjusting device of rotating equipment |
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| CN110486578A (en) | 2019-11-22 |
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