CN216198487U - Long cantilever reliable support fan performance test piece - Google Patents
Long cantilever reliable support fan performance test piece Download PDFInfo
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- CN216198487U CN216198487U CN202122487937.4U CN202122487937U CN216198487U CN 216198487 U CN216198487 U CN 216198487U CN 202122487937 U CN202122487937 U CN 202122487937U CN 216198487 U CN216198487 U CN 216198487U
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Abstract
The utility model provides a long cantilever reliable support fan performance test piece which comprises a fan rotor, a bearing part and a support part, wherein the bearing part is used for supporting the fan rotor, the bearing part extends backwards along the axial direction and is connected with a bearing frame, the support part is connected with the bearing part and the bearing frame, and a triangular bearing structure is formed among the bearing frame, the support part and the bearing part. One path of vibration load from the fan rotor is axially transmitted to the bearing frame through the bearing part, the other path of vibration load is radially transmitted to the bearing frame through the supporting part, and the two force transmission paths and the bearing frame form a triangular structural form, so that the problems of low force transmission reliability at the cantilever position of the long-cantilever reduced-scale fan performance test part and large bearing capacity at the initial position of the cantilever on the bearing outer casing can be effectively solved.
Description
Technical Field
The utility model relates to the field of structural design of fan components of aircraft engines, in particular to a long cantilever reliable support fan performance test piece.
Background
At present, when the performance test piece of a scale fan of a domestic and international civil aircraft engine is integrally distributed, two supporting points of a rotor-supporting system structure of the test piece are often arranged in a supporting formed by a bearing seat and a rear-end supporting frame, and a fan rotor is supported on the two supporting points.
From the perspective of a force transmission path, a vibration load generated by the fan rotor is mainly transmitted to the rear end bearing frame through the front bearing and the bearing seat, and the fan rotor and the bearing seat are suspended in front of the bearing frame to form a cantilever structure; for a bearing 'lubricating' system structure of a test piece, oil supply and oil return, and air supply and air return to a bearing cavity often pass through a channel inside an upper support plate of a rear-end bearing frame, so that the communication of oil and air channels of an outer bench of the test piece of the oil and air in the bearing cavity is realized.
However, the structural layout solution of the reduced-scale fan performance test piece has the following problems in some application scenarios:
for some aircraft engines, due to comprehensive consideration of factors such as aerodynamic performance, process realizability and the like, the fan culvert is only provided with culvert outlet guide vanes, and a bearing support plate in the traditional sense is cancelled.
Correspondingly, when a scaled fan performance test piece structure is designed, a scaled culvert outlet guide vane needs to be adopted, the fan culvert outlet guide vane is limited by the thickness, a supply and return air channel of a test piece cannot be arranged in the guide vane, and only an independent bearing frame support plate can be arranged at the downstream of the culvert outlet guide vane.
The fan rotor and the bearing seat under the scene are forced to be lengthened relative to the cantilever of the bearing frame, the vibration load generated by the fan rotor can be transmitted to the bearing frame through a relatively longer force transmission path (as shown in fig. 4), at the moment, on one hand, the reliability of force transmission of the cantilever part is reduced, and on the other hand, the vibration load generated by the fan rotor (especially the vibration load in test subjects such as high-state surge and the like) and the long cantilever act together to enable the initial position of the cantilever on the bearing outer casing to bear a larger moment load, and the risk of safe operation of a test piece is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects that the force transmission reliability at a cantilever is low, the bearing capacity of the initial position of the cantilever on a bearing outer casing is large, and the safe operation risk of a test piece is increased in the prior art, and provides a long-cantilever reliable-support fan performance test piece.
The utility model solves the technical problems through the following technical scheme:
the long cantilever reliable support fan performance test piece comprises a fan rotor and a bearing part, wherein the bearing part is used for supporting the fan rotor, extends backwards along the axial direction and is connected with a bearing frame, the fan rotor further comprises a supporting part connected with the bearing part and the bearing frame, and a triangular bearing structure is formed among the bearing frame, the supporting part and the bearing part.
Compared with the force transmission path of the traditional layout, the structure layout increases an auxiliary force transmission path, so that the load borne by the bearing part can be transmitted to the outer box through the supporting part and the bearing frame respectively, the moment load borne by the bearing part is shared, and the reliability is improved. One path of vibration load from the fan rotor is axially transmitted to the bearing frame through the bearing part, the other path of vibration load is radially transmitted to the bearing frame through the supporting part, and the two force transmission paths and the bearing frame form a triangular structural form, so that the problems of low force transmission reliability at the cantilever position of the long-cantilever reduced-scale fan performance test part and large bearing capacity at the initial position of the cantilever on the bearing outer casing can be effectively solved.
Preferably, the radial outer ends of the bearing frame and the support are of a circumferential continuous structure, and the radial outer ends of the bearing frame and the support are axially connected with each other to form at least one part of the outer casing. The bearing frame, the supporting piece and the outer casing adopt an integrated structure, so that the structural strength can be improved. In addition, the number of parts can be reduced, the manufacturing difficulty is simplified, and the manufacturing cost is reduced.
Preferably, the radial middle parts of the bearing frame and the supporting piece are of a circumferential continuous structure, and the bearing frame and the radial middle part of the supporting piece are axially connected with each other, so that the space between the outer casing and the bearing piece is divided into an outer duct positioned on the radial outer side and an inner duct positioned on the radial inner side. By adopting the structure, the number of parts can be reduced, the structural strength is improved, the manufacturing difficulty is simplified, and the manufacturing cost is reduced.
Preferably, the support comprises a first support supported in the endoprosthesis and a second support supported in the extraductal, the radial ends of the first and second supports overlapping each other in an interference fit. With such a structure, overconstraint can be avoided and effective load transfer can be ensured.
Preferably, the first supporting part is a culvert stator guide vane, and the second supporting part is a culvert stator guide vane. The stator guide vane can play a supporting role, and has the functions of rectifying connotation airflow and adjusting the airflow to an expected airflow direction.
Preferably, a plurality of circumferentially arranged connotative stator vanes are radially connected with each other to form a blade ring, and a plurality of circumferentially arranged connotative stator vanes are connected with each other to form a blade ring. The inner culvert stator guide vane and the outer culvert stator guide vane are arranged in an integral vane ring structure mode, and the load from the inner culvert stator vane ring can be transmitted more reliably.
Preferably, a bearing is disposed between the bearing member and the fan rotor, and the bearing includes a first bearing and a second bearing respectively disposed at two axial ends of the bearing member.
Preferably, the first bearing is a ball bearing supported between a front end of the carrier and the fan rotor, and the second bearing is a roller bearing supported between a rear end of the carrier and the fan rotor. Because the rear end of the bearing part is close to the bearing frame, the load is higher, and the adoption of the roller bearing with higher bearing capacity is beneficial to improving the overall reliability.
The positive progress effects of the utility model are as follows:
compared with a force transmission path in the traditional layout, an auxiliary force transmission path is added, so that the load borne by the bearing part can be transmitted to the outer box through the supporting part and the force bearing frame respectively, the moment load borne by the bearing part is shared, and the reliability is improved. The problem of long cantilever scale fan performance test piece cantilever department pass power reliability low and the bearing outer quick-witted casket upper cantilever initial position bears greatly is solved, it is significant to the safe operation of guarantee scale fan performance test piece.
Drawings
FIG. 1 is a structural cross-sectional view of the present invention;
FIG. 2 is a partial sectional view of the present invention;
FIG. 3 is a force transmission path view of the present invention;
fig. 4 is a sectional view of a structure of the prior art.
Description of reference numerals:
first force transmission path 10
Second force transfer path 20
Third force transfer path 30
Support 400
First supporting part 410
Second supporting part 420
Overlap location 430
Force bearing frame 500
First bearing 610
Second bearing 620
Detailed Description
The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.
As shown in fig. 1 and 3, a long cantilever 510 reliably supports a fan performance test piece, which includes a fan rotor 100, a bearing member 200, an outer casing 300, a supporting member 400 and a force-bearing frame 500.
The bearing part 200 is used for bearing the fan rotor 100, the bearing part 200 extends backwards along the axial direction and is connected with a force bearing frame 500, one end of the supporting part 400 is connected with the bearing part 200, and the other end of the supporting part 400 is connected with the force bearing frame 500, so that the force bearing frame 500, the supporting part 400 and the bearing part 200 form a triangular force bearing structure together.
Specifically, the force-bearing frame 500 is connected to the rear end of the carrier 200 and extends radially outward, one end of the support 400 is connected to the axial middle part of the carrier 200, and the other end extends backward and is connected to the force-bearing frame 500. The backward-inclined support 400 forms the hypotenuse of the triangular force-bearing structure, and the axially-extending carrier 200 and the radially-extending force-bearing frame 500 form the two mutually perpendicular short sides of the triangular force-bearing structure.
The vibration load generated by the fan rotor 100 is partially transmitted to the force-bearing frame 500 through the support member 400 extending backward and partially transmitted to the force-bearing frame 500 through the bearing member 200 extending axially. The force transmission path transmitted to the outer casing 300 through the supporting member 400 is a first force transmission path 10, the force transmission path axially transmitted to the force-bearing frame 500 through the bearing member 200 is a second force transmission path 20, and the force transmission path transmitted to the outer casing 300 through the force-bearing frame 500 is a third force transmission path 30.
Compared with the traditional layout, the structure of the utility model additionally adds an auxiliary force transmission path, so that part of the load borne by the bearing part 200 can be transmitted to the force bearing frame 500 through the supporting part 400, the moment load borne by the bearing part 200 is shared, and the stability and the reliability are improved.
In addition, a triangular structural form is formed among the first force transmission path 10, the second force transmission path 20 and the third force transmission path 30, and the triangular structure has stability, so that the support strength and the support stability can be better improved. The problem of current long cantilever 510 scale fan performance test piece cantilever department biography power reliability low and the outer quick-witted casket 300 of bearing upper cantilever initial position bears greatly is solved.
In this embodiment, the radial outer ends of the force-bearing frame 500 and the support 400 are circumferentially continuous structures, and the radial outer ends of the force-bearing frame 500 and the support 400 are axially connected with each other by a threaded fastener to form at least a part of the outer casing 300. The adoption of the circumferential continuous structure can improve the integral strength, and has the effects of simplifying the structure, reducing the number of parts and reducing the manufacturing difficulty and the manufacturing cost.
In this embodiment, the radial middle portions of the force-bearing frame 500 and the supporting member 400 are circumferentially continuous structures, and the radial middle portions of the force-bearing frame 500 and the supporting member 400 are axially connected to each other by a threaded fastener, thereby dividing the space between the outer casing 300 and the bearing member 200 into an outer duct 310 located radially outside and an inner duct 320 located radially inside. The provision of the inner and outer ducts 310 can improve fuel economy and thrust of the aircraft engine. In addition, the structure is simplified, the number of parts is reduced, the strength is improved, the manufacturing difficulty is simplified, the manufacturing cost is reduced, and the like.
As shown in fig. 2, in the present embodiment, the support 400 includes a first support 410 supported in the endoprosthesis 320 and a second support 420 supported in the extraductal 310, and radial ends of the first support 410 and the second support 420 are overlapped with each other by interference fit, and the overlapping position 430 is at an axial front end. By adopting the structure, the over-constraint can be avoided, and the effective transmission of the load can be ensured.
In a further preferred embodiment, the first supporting portion 410 is a bypass stator vane, the second supporting portion 420 is a bypass stator vane, and the stator vane can both support and rectify the bypass airflow and adjust the airflow to the desired airflow direction. The effective utilization of the structure is realized.
Preferably, a plurality of circumferentially connected culvert stator vanes are radially connected to each other to form a blade ring, and a plurality of circumferentially arranged culvert stator vanes are connected to each other to form a blade ring. Set up connotative stator, outer connotative stator into integral blade ring structural style, have better intensity, can more reliable transmission come from the load of connotative stator blade ring. This connection structure between interior stator, outer stator is located the circumferential continuous structure of radial outer end and radial middle part of bearing frame 500 and support piece 400 promptly, from this, has further realized the structural reuse, has reduced part quantity.
As shown in fig. 1, in the present embodiment, the bearing member 200 includes a front bearing seat 210, a rear long cantilever 510, and a circumferentially continuous structure at a radially inner end of the first support part 410, and the circumferentially continuous structure connects the bearing seat 210 and the long cantilever 510, respectively. The long cantilever 510 is integrally connected to a radial support 520, the radial support 520 and the long cantilever 510 form at least a part of the bearing frame 500, and the second force transmission path 20 passes through the radial support 520.
The bearing is arranged between the bearing component 200 and the fan rotor 100, the bearing comprises a first bearing 610 arranged between the front end of the bearing seat 210 and the fan rotor 100 and a second bearing 620 arranged between the long cantilever 510 and the fan rotor 100, the first bearing 610 is a ball bearing, the second bearing 620 is a rolling rod bearing, the long cantilever 510 is close to the bearing frame 500, the load is high, the rolling rod bearing with high bearing capacity is adopted, the overall reliability is improved, and the stable support of the fan rotor 100 is realized.
While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.
Claims (9)
1. The utility model provides a fan performance test spare is reliably supported to long cantilever, includes the fan rotor for support the carrier of fan rotor, the carrier extends and connects the bearing frame along the axial rearwards, its characterized in that: the bearing part is connected with the bearing part and the bearing frame, and a triangular bearing structure is formed among the bearing frame, the bearing part and the bearing part.
2. The long cantilever reliably supported fan performance test piece of claim 1, wherein: the supporting piece extends from the middle part of the bearing piece in a backward inclining mode and is connected with the force bearing frame.
3. The long cantilever reliably supported fan performance test piece of claim 1, wherein: the radial outer ends of the bearing frame and the supporting piece are of circumferential continuous structures, and the radial outer ends of the bearing frame and the supporting piece are axially connected with each other to form at least one part of the outer casing.
4. The long cantilever reliably supported fan performance test piece of claim 3, wherein: the radial middle parts of the bearing frame and the supporting piece are of circumferential continuous structures, and the radial middle parts of the bearing frame and the supporting piece are axially connected with each other, so that the space between the outer casing and the bearing piece is divided into an outer duct positioned on the radial outer side and an inner duct positioned on the radial inner side.
5. The long cantilever reliably supported fan performance test piece of claim 4, wherein: the supporting part comprises a first supporting part and a second supporting part, wherein the first supporting part is supported in the inner duct, the second supporting part is supported in the outer duct, and the radial end parts of the first supporting part and the second supporting part are in interference fit lap joint with each other.
6. The long cantilever reliably-supported fan performance test piece of claim 5, wherein: the first supporting part is a culvert stator guide vane, and the second supporting part is a culvert stator guide vane.
7. The long cantilever reliably supported fan performance test piece of claim 6, wherein: a plurality of connotation stator vanes that arrange along circumference are radially connected each other for the blade ring, and are a plurality of arrange the connotation stator vane along circumference and connect each other for the blade ring.
8. The long cantilever reliably supported fan performance test piece of claim 1, wherein: the bearing is arranged between the bearing piece and the fan rotor and comprises a first bearing and a second bearing which are respectively arranged at two axial ends of the bearing piece.
9. The long cantilever reliably-supported fan performance test piece of claim 8, wherein: the first bearing is a ball bearing supported between the front end of the bearing member and the fan rotor, and the second bearing is a rolling rod bearing supported between the rear end of the bearing member and the fan rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122487937.4U CN216198487U (en) | 2021-10-15 | 2021-10-15 | Long cantilever reliable support fan performance test piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122487937.4U CN216198487U (en) | 2021-10-15 | 2021-10-15 | Long cantilever reliable support fan performance test piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216198487U true CN216198487U (en) | 2022-04-05 |
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ID=80867212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122487937.4U Active CN216198487U (en) | 2021-10-15 | 2021-10-15 | Long cantilever reliable support fan performance test piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216198487U (en) |
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2021
- 2021-10-15 CN CN202122487937.4U patent/CN216198487U/en active Active
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