CN119021759A - A locking device and non-variable capacity turbine machinery - Google Patents
A locking device and non-variable capacity turbine machinery Download PDFInfo
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- CN119021759A CN119021759A CN202411510587.0A CN202411510587A CN119021759A CN 119021759 A CN119021759 A CN 119021759A CN 202411510587 A CN202411510587 A CN 202411510587A CN 119021759 A CN119021759 A CN 119021759A
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- mounting block
- rotor
- locking device
- fastener
- stud
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/32—Locking, e.g. by final locking blades or keys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
本发明公开了一种锁紧装置及非变容式透平机械，属于非变容式透平机械领域，一种锁紧装置包括：转子；沿周向连接于转子上的若干叶片，相邻叶片互相抵触；与转子、相邻叶片均紧固连接的紧固件；防松组件，防松组件包括第一安装块、第二安装块以及防松单元，第一安装块套接于紧固件外，第一安装块的一端和转子抵触，第二安装块限位套接于紧固件外，防松单元连接于第一安装块的另一端和第二安装块的一端之间，防松单元和相邻叶片均抵触。本发明的技术效果在于它便于对相关非变容式透平机械的叶片进行锁紧防松。
The present invention discloses a locking device and a non-variable capacity turbine machine, belonging to the field of non-variable capacity turbine machines. A locking device comprises: a rotor; a plurality of blades connected to the rotor along the circumferential direction, and adjacent blades are in conflict with each other; a fastener that is tightly connected to the rotor and adjacent blades; an anti-loosening assembly, the anti-loosening assembly comprises a first mounting block, a second mounting block and an anti-loosening unit, the first mounting block is sleeved outside the fastener, one end of the first mounting block is in conflict with the rotor, the second mounting block is limitedly sleeved outside the fastener, the anti-loosening unit is connected between the other end of the first mounting block and one end of the second mounting block, and the anti-loosening unit is in conflict with adjacent blades. The technical effect of the present invention is that it is convenient for locking and preventing the blades of the relevant non-variable capacity turbine machine from loosening.
Description
Technical Field
The invention relates to a non-positive-displacement turbomachine, in particular to a locking device and a non-positive-displacement turbomachine.
Background
A turbomachine is a machine in which energy conversion is achieved by a rotor provided with blades that rotates at high speed, and by the interaction of forces between the blades and a fluid (gas or liquid) as it flows through the passages between the blades.
The non-positive-displacement turbomachine is a common turbomachine, and has the advantage of high efficiency, because the temperature of fluid contacted by the blades of the related non-positive-displacement turbomachine can change greatly during operation, if the blades are tightly installed, large thermal stress can be generated to cause rotor faults, so that a certain gap needs to be reserved during the installation of the blades, and in addition, the rotor rotating at a high speed can cause circumferential play among the blades, so that the blades of the related non-positive-displacement turbomachine need to be locked and loosened.
Disclosure of Invention
The invention aims to: the invention aims to provide a locking device which is convenient for locking and preventing looseness of blades of related non-positive-displacement turbomachinery; it is yet another object of the present invention to provide a non-positive displacement turbomachine.
The technical scheme is as follows: a locking device comprising:
A rotor;
A plurality of blades connected to the rotor along the circumferential direction, wherein adjacent blades are mutually abutted;
a fastener fixedly connected with the rotor and the adjacent blades;
The anti-loosening assembly comprises a first mounting block, a second mounting block and an anti-loosening unit, wherein the first mounting block is sleeved outside the fastener, one end of the first mounting block is in conflict with the rotor, the second mounting block is limited to be sleeved outside the fastener, the anti-loosening unit is connected between the other end of the first mounting block and one end of the second mounting block, and the anti-loosening unit is in conflict with adjacent blades.
Optionally, the locking unit includes all articulate in the other end of first installation piece with two elastic component between the one end of second installation piece, two elastic components respectively with adjacent the blade is contradicted.
Optionally, the anti-loosening unit includes two multi-link modules, the multi-link modules including:
The outer stay bar is hinged with the fixing rod, and one end of the outer stay bar, which is far away from the fixing rod, is hinged with the other end of the first mounting block;
the first shrinkage rod and the second shrinkage rod are hinged with each other, one end of the first shrinkage rod, which is far away from the second shrinkage rod, is hinged with one end of the second installation block, and one end of the second shrinkage rod, which is far away from the first shrinkage rod, is hinged with the middle part of the fixed rod;
Wherein, the dead lever is kept away from the one end of outer vaulting pole with the blade is contradicted.
Optionally, the fastener further comprises a first nut in threaded sleeve connection with the outside of the fastener, and the first nut is abutted against the other end of the second mounting block.
Optionally, the method further comprises:
a plurality of resilient protrusions axially spaced apart from each other and connected to the fastener;
the pressing block is movably connected with the second installation block, and the pressing block is abutted against the elastic bulge;
wherein, the second installation piece cup joints in the elasticity is protruding outward.
Optionally, the fastener includes:
one end of the stud is in threaded connection with the rotor;
the second nut is in threaded connection with the other end of the stud;
the gasket is sleeved outside the other end of the stud, one end of the gasket is abutted against the adjacent blade, and the other end of the gasket is abutted against the second nut;
The first installation block and the second installation block are sleeved outside the stud.
Optionally, the method further comprises:
the first mounting block is arranged in the first counter bore, and one end of the first mounting block is positioned in the first counter bore;
The locking holes and the second counter bores are arranged on the adjacent blades and are mutually communicated, the other ends of the studs penetrate through the locking holes, and the second nuts and the gaskets are positioned in the second counter bores.
Optionally, the blade includes main part, rim plate and the tenon that connect gradually, the tenon along circumference connect in on the rotor, adjacent the rim plate is contradicted each other, the fastener with adjacent the equal fastening connection of rim plate, locking unit with adjacent the tenon is all contradicted.
Optionally, the rotor further comprises mortises arranged on the rotor at intervals along the axial direction, and the tenons are connected in the mortises along the circumferential direction.
A non-positive displacement turbomachine includes a locking device.
Advantageous effects
1) The anti-loosening assembly is used for loosening prevention, when the axial distance between the first installation block and the second installation block is reduced, the anti-loosening unit is convenient to open, so that the anti-loosening unit is in collision with adjacent blades, the anti-loosening effect is good, and even if the blades and the rotor of the related non-positive-displacement turbine machinery are required to rotate at a high speed during working, the blades and the rotor can be prevented from loosening.
2) The tenon of the blade generates an outward acting force on the second mounting block through the elastic piece, and the resultant force enables the second mounting block to be upward so as to prevent the loosening of the first nut. In addition, centrifugal force that the rotor rotation in-process produced makes first installation piece upwards move certain displacement along the double-screw bolt to make the elastic component take place bigger deformation, further prevent the loosening of first nut, and effectively guarantee the circumference of blade fixed.
3) The tenon of the blade is perpendicular to the rod outwards, the acting force of the tenon of the blade on the fixed rod is transmitted by the second shrinkage rod to obliquely upwards along the first shrinkage rod, and the resultant force enables the second installation block to upwards, so that the limiting effect of the elastic bulge on the second installation block is further increased, and the separation of the elastic bulge is prevented. In addition, the centrifugal force generated in the rotating process of the rotor can further increase the limiting effect of the elastic bulge on the second mounting block, and the fixing effect of the fixing rod on the tenon can be increased.
Drawings
FIG. 1 is a schematic view of a blade according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the connection of a blade and a rotor according to an embodiment of the present invention;
FIG. 3 is a partial view of FIG. 2A;
FIG. 4 is a cross-sectional view of B-B of FIG. 2;
FIG. 5 is a partial view of FIG. 4;
FIG. 6 is one of the schematic structural views of the anti-loosening assembly according to the embodiment of the present invention;
FIG. 7 is a second schematic view of a locking assembly according to an embodiment of the present invention;
FIG. 8 is one of the schematic structural views of the locking device according to the embodiment of the present invention in the installation;
FIG. 9 is one of the structural schematic diagrams of the locking device of the embodiment of the present invention after installation;
FIG. 10 is a third schematic view of the anti-loosening assembly according to the embodiment of the present invention;
FIG. 11 is a schematic diagram of a locking assembly according to an embodiment of the present invention;
FIG. 12 is a second schematic view of the structure of the locking device according to the embodiment of the present invention when installed;
FIG. 13 is a second schematic view of the structure of the locking device according to the embodiment of the present invention after installation;
In the figure: 1. a rotor; 11. a first counterbore; 12. a threaded hole; 13. a tongue and groove; 2. a blade; 21. a main body portion; 22. a flange plate; 221. a locking hole; 222. a second counterbore; 23. a tenon; 3. a fastener; 31. a stud; 32. a second nut; 33. a gasket; 4. an anti-loosening component; 41. a first mounting block; 42. a second mounting block; 43. a locking unit; 431. an elastic member; 432. a multi-link module; 4321. a first retracting lever; 4322. a second retracting lever; 4323. an outer stay; 4324. a fixed rod; 44. a first nut; 45. an elastic protrusion; 46. pressing the blocks.
Detailed Description
In order to make the technical scheme of the invention clearer, the invention is further described in detail below with reference to the attached drawings and specific embodiments.
Example 1
As shown in fig. 1 to 9, the present embodiment provides a locking device, including: a rotor 1; a plurality of blades 2 connected to the rotor 1 in the circumferential direction, adjacent blades 2 abutting against each other; a fastener 3 fastened and connected with the rotor 1 and the adjacent blades 2; the anti-loosening assembly 4, the anti-loosening assembly 4 includes a first mounting block 41, a second mounting block 42 and an anti-loosening unit 43, the first mounting block 41 is sleeved outside the fastening piece 3, one end of the first mounting block 41 is in interference with the rotor 1, the second mounting block 42 is limited to be sleeved outside the fastening piece 3, the anti-loosening unit 43 is connected between the other end of the first mounting block 41 and one end of the second mounting block 42, and the anti-loosening unit 43 is in interference with the adjacent blade 2.
Specifically, the rotor 1 is used for bearing a plurality of blades 2, and the rotor 1 can be a hollow rotor or a solid rotor; the blades 2 are connected to the rotor 1 along the circumferential direction, so that the blades 2 form a certain stage of blade group, and the adjacent blades 2 are prevented from relative movement due to mutual interference of the adjacent blades 2; the fastening pieces 3 are used for fastening and connecting the rotor 1 and the adjacent blades 2, so that the adjacent blades 2 and the rotor 1 are prevented from rotating relatively to the circumferential direction, and the fastening pieces 3 are not required to be arranged between every two adjacent blades 2, the fastening pieces 3 are arranged at intervals, the specific number of the fastening pieces 3 is not limited, and the fastening pieces 3 can be screws, bolts and the like; the locking subassembly 4 is used for locking, when reducing the axial interval between first installation piece 41 and the second installation piece 42, be convenient for make locking unit 43 prop up, thereby make locking unit 43 and adjacent blade 2 all contradict, locking effect is good, even during operation relevant non-positive displacement turbomachine's blade 2 and rotor 1 all need high-speed rotation, also can prevent blade 2 and rotor 1 not hard up, wherein, first installation piece 41 and second installation piece 42 all are equipped with the passageway, the passageway is convenient for pass fastener 3, but do not set up the internal thread in the passageway, that is to say that first installation piece 41 and second installation piece 42 all axial activity cup joint outside fastener 3, and not the screw thread cup joints.
Further, as shown in fig. 6 to 9, the locking unit 43 includes two elastic members 431 each hinged between the other end of the first mounting block 41 and one end of the second mounting block 42, and the two elastic members 431 respectively collide with the adjacent blade 2. Specifically, the two elastic members 431 are used for preventing loosening, the specific structure of the elastic members 431 is not limited, as shown in fig. 7, and may be an integral elastic plate, elastic rod or elastic block, as shown in fig. 6, or may be a plurality of mutually connected elastic connecting rods, and the elastic members 431 may be made of spring steel, rubber, or the like.
Further, as shown in fig. 8-9, the fastener further comprises a first nut 44 screwed and sleeved outside the fastener 3, and the first nut 44 abuts against the other end of the second mounting block 42. Specifically, the first nut 44 is configured to axially limit the second mounting block 42, so that the second mounting block 42 is limited and sleeved outside the fastener 3.
Further, as shown in fig. 8 to 9, the fastener 3 includes: the stud 31, one end of the stud 31 is in threaded connection with the rotor 1; a second nut 32 screwed to the other end of the stud 31; a gasket 33 sleeved outside the other end of the stud 31, wherein one end of the gasket 33 is abutted against the adjacent blade 2, and the other end of the gasket 33 is abutted against the second nut 32; wherein, the first mounting block 41 and the second mounting block 42 are both sleeved outside the stud 31.
Specifically, the stud 31 is matched with the second nut 32, so that the adjacent blade 2 and the rotor 1 are fastened and connected, and since the stud 31 in the embodiment is also connected with the first nut 44 through threads, external threads are formed on the whole periphery of the stud 31 in the embodiment; the gasket 33 is used for increasing the anti-loosening performance between the adjacent blade 2 and the second nut 32, and the gasket 33 can be a flat gasket, a spring gasket and the like; wherein, stud 31, second nut 32 and gasket 33 etc. can all be used repeatedly many times, be convenient for reduce fastener 3's spare part to be convenient for practice thrift the cost.
Further, as shown in fig. 5 and fig. 8-9, the method further includes: a threaded hole 12 and a first counter bore 11 which are both arranged on the rotor 1 and are mutually communicated, one end of a stud 31 is in threaded connection with the threaded hole 12, and one end of a first mounting block 41 is positioned in the first counter bore 11; the locking hole 221 and the second counter bore 222 are respectively arranged on the adjacent blades 2 and are mutually communicated, the other end of the stud 31 penetrates through the locking hole 221, and the second nut 32 and the gasket 33 are respectively positioned in the second counter bore 222.
Specifically, the threaded hole 12 is used for being in threaded connection with one end of the stud 31, so that the rotor 1 is in threaded connection with one end of the stud 31; the first counter bore 11 is used for accommodating one end of the first mounting block 41, so that radial limiting effect is conveniently generated on the first mounting block 41; the locking hole 221 is used for passing through the other end of the stud 31 and also used for passing through a disassembling tool such as a screwdriver; the second counter bore 222 is used for accommodating the second nut 32 and the gasket 33, preventing the second nut 32 and the gasket 33 from protruding on the surface of the blade 2, and ensuring good flatness of the surface of the blade 2; only the locking hole 221 and the second counter bore 222 are arranged on the blade 2, and additional processing on the blade 2 is not needed, so that the influence on the pneumatic performance of the blade 2 is reduced.
Further, as shown in fig. 1, the blade 2 includes a main body 21, a flange 22 and a tenon 23 which are sequentially connected, the tenon 23 is connected to the rotor 1 along the circumferential direction, adjacent flanges 22 are mutually abutted, the fastener 3 is fixedly connected with the adjacent flanges 22, and the locking unit 43 is abutted against the adjacent tenon 23. Specifically, the main body portion 21 facilitates the aerodynamic performance of the blade 2; the flange 22 is used for connecting the main body 21 and the tenon 23; the tenon 23 is used for being connected with the rotor 1 and is used for being abutted against the anti-loosening unit 43; in order to ensure the integrity, the connection mode among the main body part 21, the flange plate 22 and the tenon 23 is integrated connection.
Further, as shown in fig. 1-2, the rotor further comprises a plurality of mortises 13 axially spaced on the rotor 1, and the tenons 23 are circumferentially connected in the mortises 13. In particular, the mortises 13 are adapted to receive tenons 23 and thus to receive blades 2, the number of mortises 13 being unlimited, each mortises 13 being adapted to receive several blades 2, i.e. for receiving a certain stage of a blade assembly, and several mortises 13 being adapted to receive multiple stages of blade assemblies.
8-9, For the locking device in this embodiment, when installed, the tenons 23 of a number of blades 2 are first placed in the mortise 13; then, one end of the stud 31 is screwed with the threaded hole 12; then the first mounting block 41, the two elastic pieces 431 and the second mounting block 42 are sleeved outside the stud 31, one end of the first mounting block 41 is matched with the first counter bore 11 under the action of gravity, and the two elastic pieces 431 are initially spread; further, the first nut 44 is in threaded connection with the stud 31, so that the other ends of the first nut 44 and the second mounting block 42 are abutted, and the first nut 44 is continuously rotated towards the direction close to the second mounting block 42, so that the two elastic pieces 431 are further spread until the two elastic pieces 431 are abutted against the adjacent blades 2 respectively; finally, the washer 33 is sleeved outside the other end of the stud 31, and the second nut 32 is screwed outside the other end of the stud 31, thereby completing the installation.
In this embodiment, the tenon 23 of the blade 2 generates an outward force (see F1 and F2 in fig. 9 for details) on the second mounting block 42 via the elastic member 431, and the resultant force makes the second mounting block 42 upward (see F3 in fig. 9 for details), preventing the loosening of the first nut 44. In addition, the centrifugal force generated during the rotation of the rotor 1 causes the first mounting block 41 to move upwards along the stud 31 by a certain displacement, so that the elastic member 431 is deformed more greatly, loosening of the first nut 44 is further prevented, and circumferential fixation of the blade 2 is effectively ensured.
The embodiment also provides a non-positive-displacement turbine machine, which comprises the locking device of the embodiment.
Example 2
As shown in fig. 10 to 13, compared with the technical solution of embodiment 1, the anti-loosening unit 43 of the present embodiment can be modified as follows:
Further, the locking unit 43 includes two multi-link modules 432, and the multi-link modules 432 include: an outer stay 4323 and a fixing rod 4324 hinged to each other, one end of the outer stay 4323 away from the fixing rod 4324 being hinged to the other end of the first mounting block 41; a first contraction rod 4321 and a second contraction rod 4322 hinged to each other, wherein one end of the first contraction rod 4321 far from the second contraction rod 4322 is hinged to one end of the second mounting block 42, and one end of the second contraction rod 4322 far from the first contraction rod 4321 is hinged to the middle part of the fixing rod 4324; wherein the end of the fixing lever 4324 remote from the outer stay 4323 abuts against the vane 2. In particular, the outer struts 4323, the fixed rods 4324, the first retraction rods 4321, and the second retraction rods 4322 facilitate retraction and distraction of the multi-link module 432.
Further, the method further comprises the following steps: a plurality of elastic protrusions 45 axially spaced apart from each other and connected to the fastener 3; a pressing block 46 movably connected with the second mounting block 42, the pressing block 46 being abutted against the elastic protrusion 45; wherein, the second mounting block 42 is sleeved outside the elastic bulge 45. Specifically, the elastic protrusions 45 are used for realizing elastic limit connection with the second mounting block 42, so that the second mounting block 42 is convenient to be in limit sleeving connection with the stud 31 of the fastener 3, and as the stud 31 in the embodiment is not required to be in threaded connection with the first nut 44, external threads are arranged at two ends of the periphery of the nut in the embodiment, wherein the elastic protrusions 45 can be made of silicone rubber, fluororubber and the like; the pressing block 46 is used to press the elastic protrusion 45 such that the elastic protrusion 45 is flush with the surface of the stud 31 or such that the elastic protrusion 45 is lower than the surface of the stud 31, thereby facilitating the engagement or disengagement of the second mounting block 42 and the elastic protrusion 45.
As shown in fig. 12-13, for the locking device in this embodiment, when mounting, the tenons 23 of several blades 2 are first placed in the mortises 13; then, one end of the stud 31 is screwed with the threaded hole 12; then the first mounting block 41, the two multi-connecting rod modules 432 and the second mounting block 42 are sleeved outside the stud 31, one end of the first mounting block 41 is matched with the first counter bore 11 under the action of gravity, and the two multi-connecting rod modules 432 are initially spread; further, the second mounting block 42 is moved towards the direction close to the first mounting block 41, so that the two multi-link modules 432 are further spread, the elastic protrusions 45 at proper positions are selected, the second mounting block 42 is sleeved outside the elastic protrusions 45 at proper positions by pressing the block 46, and the two multi-link modules 432 are guaranteed to respectively collide with the adjacent blades 2; finally, the washer 33 is sleeved outside the other end of the stud 31, and the second nut 32 is screwed outside the other end of the stud 31, thereby completing the installation.
In this embodiment, the tenon 23 of the blade 2 acts on the fixing bar 4324 perpendicularly to the bar outward (see F4 and F5 in fig. 13 in detail), and is transferred via the second shrinkage bar 4322 obliquely upward (see F6 and F7 in fig. 13 in detail) along the first shrinkage bar 4321, so that the resultant force makes the second mounting block 42 upward (see F8 in fig. 13 in detail), and the limit effect of the elastic protrusion 45 on the second mounting block 42 is further increased to prevent the second mounting block from being separated. In addition, the centrifugal force generated during the rotation of the rotor 1 may further increase the limit effect of the elastic protrusions 45 on the second mounting block 42, and may increase the fixing effect of the fixing rod 4324 on the tenon 23.
Example 3
As shown in fig. 1 to 13, compared with the technical solutions of embodiments 1 or 2, the anti-loosening unit 43 of the present embodiment can be modified as follows:
Further, the locking unit 43 includes two elastic members 431 each hinged between the other end of the first mounting block 41 and one end of the second mounting block 42, and the two elastic members 431 respectively collide with the adjacent blade 2.
Further, the method further comprises the following steps: a plurality of elastic protrusions 45 axially spaced apart from each other and connected to the fastener 3; a pressing block 46 movably connected with the second mounting block 42, the pressing block 46 being abutted against the elastic protrusion 45; wherein, the second mounting block 42 is sleeved outside the elastic bulge 45.
Example 4
As shown in fig. 1 to 13, compared with the technical solutions of any one of embodiments 1 to 3, the anti-loosening unit 43 of the present embodiment can be modified as follows:
further, the locking unit 43 includes two multi-link modules 432, and the multi-link modules 432 include: an outer stay 4323 and a fixing rod 4324 hinged to each other, one end of the outer stay 4323 away from the fixing rod 4324 being hinged to the other end of the first mounting block 41; a first contraction rod 4321 and a second contraction rod 4322 hinged to each other, wherein one end of the first contraction rod 4321 far from the second contraction rod 4322 is hinged to one end of the second mounting block 42, and one end of the second contraction rod 4322 far from the first contraction rod 4321 is hinged to the middle part of the fixing rod 4324; wherein the end of the fixing lever 4324 remote from the outer stay 4323 abuts against the vane 2.
Further, the fastener further comprises a first nut 44 which is in threaded sleeve connection with the outside of the fastener 3, and the other ends of the first nut 44 and the second mounting block 42 are abutted.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411510587.0A CN119021759B (en) | 2024-10-28 | 2024-10-28 | A locking device and non-variable capacity turbine machinery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411510587.0A CN119021759B (en) | 2024-10-28 | 2024-10-28 | A locking device and non-variable capacity turbine machinery |
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| CN119021759A true CN119021759A (en) | 2024-11-26 |
| CN119021759B CN119021759B (en) | 2025-03-21 |
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| CN114810219A (en) * | 2021-01-29 | 2022-07-29 | 中国航发商用航空发动机有限责任公司 | Aircraft engine |
| CN115217529A (en) * | 2021-04-20 | 2022-10-21 | 中国航发商用航空发动机有限责任公司 | Locking device for rotor blade |
| CN117167333A (en) * | 2023-08-28 | 2023-12-05 | 江苏永昊高强度螺栓有限公司 | A bolt locking assembly for an aircraft engine compressor |
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| CN119021759B (en) | 2025-03-21 |
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