CN112943672A - Auxiliary connecting piece and auxiliary supporting structure - Google Patents
Auxiliary connecting piece and auxiliary supporting structure Download PDFInfo
- Publication number
- CN112943672A CN112943672A CN202110532081.XA CN202110532081A CN112943672A CN 112943672 A CN112943672 A CN 112943672A CN 202110532081 A CN202110532081 A CN 202110532081A CN 112943672 A CN112943672 A CN 112943672A
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- bearing
- auxiliary
- test
- support
- force
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/64—Mounting; Assembling; Disassembling of axial pumps
- F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
An auxiliary connector for connecting a bearing case and a test support is provided, and comprises a first end and a second end. The first end comprises a shaft hole, the second end comprises a connecting pin, and the force bearing casing provides a connecting pin hole corresponding to the connecting pin. The second end is used for being in interference fit with the connecting pin hole through the connecting pin and further being fixedly connected with the bearing casing; the first end is used for being fixedly connected with the test supporting piece through a supporting pin shaft matched with the shaft hole. The auxiliary connecting piece can effectively connect the bearing casing and the test supporting piece, and can transmit circumferential load and radial load from the test piece through the connecting pin, so that the connection rigidity of the test piece and the test bed is ensured. An auxiliary support structure is also provided.
Description
Technical Field
The invention relates to a device for a performance test of a multistage axial flow compressor, in particular to a supporting structure for the performance test of the multistage axial flow compressor.
Background
At present, the tail end of a multi-stage axial flow compressor performance test piece of an aeroengine at home and abroad is generally rigidly connected with an exhaust volute of a test bed so as to ensure the boundary condition of each direction of displacement of the test piece. Meanwhile, because the axial length of the multistage axial flow compressor is long and the axial thermal deformation exists in the working state, an auxiliary support which is restricted by radial and circumferential displacement and allows the displacement in the axial direction needs to be arranged at the front end of the test piece.
From the aspect of controlling the vibration of the whole machine of the test piece of the multistage axial-flow compressor, not only the connection reliability between all components of a main force transmission path on a rotor-bearing system of the test piece is required to be ensured, but also the connection reliability between the test piece and a test bed is required to be ensured, namely the system rigidity of the test piece is ensured to be in accordance with the design expectation, and the unexpected vibration of the whole machine cannot occur.
However, in practical engineering applications, the following problems are liable to occur: firstly, the auxiliary supporting seat is usually connected with the test piece by short bolts, the adopted short bolts mostly use a plurality of continuous short bolts positioned on the mounting edge of the main force transmission path of the 'rotor-support' system of the test piece, but the short bolts at the connecting position of the auxiliary supporting seat and the test piece are usually loosened due to complex working conditions, so that the connection rigidity between components on the main force transmission path of the 'rotor-support' system of the test piece is changed, and further the test piece is subjected to unexpected vibration; and secondly, short bolts used for connecting the auxiliary supporting seat and the test piece or a plurality of continuous short bolts positioned on the mounting edge of the main force transmission path of the non-rotor-bearing system of the test piece are used, the short bolts at the connecting position of the auxiliary supporting seat and the test piece are loosened due to complex working conditions, the connecting rigidity of the test piece and the test bed is changed, and the test piece is subjected to unexpected vibration.
Disclosure of Invention
An object of the present invention is to provide an auxiliary connecting member, which can effectively increase the rigidity of a test piece and prevent the test piece from vibrating.
The auxiliary connecting piece for achieving the purpose is used for connecting a force bearing casing and a test support piece and comprises a first end and a second end. The first end comprises a shaft hole, the second end comprises a connecting pin, and the force bearing casing provides a connecting pin hole corresponding to the connecting pin. The second end is used for being in interference fit with the connecting pin hole through the connecting pin, and then is fixedly connected with the bearing case, and the first end is used for being fixedly connected with the test supporting piece through a supporting pin shaft matched with the shaft hole.
In one or more embodiments, the second end further includes a plurality of fixing screw holes surrounding the connecting pin, the messenger case provides corresponding screw holes corresponding to the plurality of fixing screw holes, and a plurality of bolts radially pass through the plurality of fixing screw holes and the plurality of corresponding screw holes respectively to fasten the second end and the messenger case.
In one or more embodiments, the second end includes a flange extending around the connecting pin, and the flange is provided with the plurality of fastening screw holes.
In one or more embodiments, the plurality of fixing screw holes are uniformly distributed on the flange plate in the circumferential direction.
In one or more embodiments, the shaft hole extends along the axial direction of the bearing case, and the connecting pin protrudes along the radial direction of the bearing case.
The invention also aims to provide an auxiliary supporting structure which comprises a test supporting piece, a bearing casing, a supporting pin shaft and the auxiliary connecting piece. The test support piece comprises a matching shaft hole which is axially penetrated, a connecting pin hole is formed in the force bearing casing, the auxiliary connecting piece is fixedly connected with the force bearing casing through the connecting pin in an interference fit mode, and the auxiliary connecting piece is fixedly connected with the test support piece through a supporting pin shaft which penetrates through the shaft hole.
In one or more embodiments, the bearing case further comprises a bearing outer case, a bearing inner case and a plurality of bearing support plates, the bearing support plates radially connect the bearing inner case and the bearing outer case, and the connecting pin hole is arranged on the bearing outer case and is located near the bearing support plates.
In one or more embodiments, the support pin is in interference fit with the mating shaft hole on the test support.
In one or more embodiments, the supporting pin is in clearance fit with the shaft hole on the auxiliary connecting piece.
In one or more embodiments, the support pin shaft is engaged with the shaft hole through a ball bearing.
In one or more embodiments, the bottom of the test support is provided with a slide rail for adjusting the position of the test support.
In one or more embodiments, the slide rail provides movement in a first direction and a second direction, the first direction and the second direction intersecting one another.
The auxiliary connecting piece is connected with the test supporting piece through the first end and is connected with the force bearing casing through the second end, so that auxiliary support is provided for the force bearing casing. And the force bearing casing can transmit circumferential load from the test piece to the test support piece through the connecting pin on the auxiliary connecting piece, and transmit radial load from the test piece to the test support piece through interference fit friction force between the connecting pin and the connecting pin hole, so that the connection rigidity of the test piece and the test bed is enhanced, unexpected vibration of the test piece is avoided, and the test reliability is improved.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of an auxiliary support structure.
Fig. 2 is a sectional view of the connection structure of the auxiliary connecting piece and the bearing case.
Fig. 3 is a schematic view of one embodiment of a catenary case.
Detailed Description
The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention. It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the invention as it is actually claimed.
As shown in fig. 1, the auxiliary connecting piece 3 is used for connecting the force bearing casing 1 and the test support piece 4, the force bearing casing 1 is used for bearing a test piece, and the test piece is an aircraft engine test piece such as a multistage axial flow compressor. The test support member 4 is positioned on the test bench and used for supporting the bearing case 1.
As can be understood by referring to the connection section of the auxiliary connecting member 3 and the force bearing casing 1 shown in fig. 2, the auxiliary connecting member 3 includes a first end 31 and a second end 32, the auxiliary connecting member 3 is fixedly connected with the test support 4 through the first end 31, and the auxiliary connecting member 3 is fixedly connected with the force bearing casing 1 through the second end 32.
The first end 31 of the auxiliary connecting piece 3 comprises a shaft hole 33, and the first end 31 is used for being fixedly connected with the test support piece 4 through the shaft hole matched support pin shaft 2. The second end 32 comprises a connecting pin 35, the force bearing case 1 is provided with a connecting pin hole 16 corresponding to the connecting pin 35, and the second end 32 is used for being fixedly connected with the force bearing case 1 through interference fit of the connecting pin 35 and the connecting pin hole 16.
The shaft hole 33 preferably extends along the axial direction of the bearing case 1, and the connecting pin 35 preferably protrudes along the radial direction of the bearing case 1, so that the force of the test piece from the bearing case 1 can be transmitted outwards along the radial direction, thereby providing a transmission path of the radial load of the test piece. The shaft hole 33 and the connecting pin 35 include, but are not limited to, the arrangement of the above embodiment, and in other embodiments, the present disclosure can be applied as long as the purpose of effectively connecting the auxiliary connecting member 3, the bearing case 1 and the test support member 4 with certain strength can be achieved.
The connecting pin 35 is preferably a large diameter pin to achieve an effective interference fit with the connecting pin hole 16 to provide sufficient strength support for the bearing case 1. In addition, compared with the mode of connecting by using a common short bolt, the pin with a larger diameter can bear shearing force and torsional force, so that the connecting capability of the bearing case 1 can be enhanced, and the load transmitted by the test piece can be effectively transmitted in various modes through the connecting pin 35.
Through the interference fit of the connecting pin 35 and the connecting pin hole 16, the circumferential load of the test piece from the bearing casing 1 can be transmitted through the shear bearing of the connecting pin 35, meanwhile, the radial load of the test piece can be transmitted through the interference fit friction force between the connecting pin 35 and the connecting pin hole 16, and further the radial and circumferential loads from the test piece are transmitted to the test support piece 4 through the auxiliary connecting piece 3, so that the connection rigidity of the test piece on the bearing casing 1 and the test support piece 4 is ensured, and the rigidity of systems such as a multi-stage axial-flow compressor test piece and the like is effectively prevented from changing in work, so that the whole machine vibration condition is caused.
On the basis of the above embodiment, the second end 32 further includes a plurality of fixing screw holes 36 surrounding the connecting pin 35, the force-bearing case 1 provides corresponding screw holes 15 corresponding to the plurality of fixing screw holes 36, and the plurality of bolts 5 respectively radially penetrate through the plurality of fixing screw holes 36 and the plurality of corresponding screw holes 15 to fasten the second end 32 and the force-bearing case 1, so as to increase the connecting strength between the auxiliary connecting member 3 and the force-bearing case 1.
The bolts 5 are preferably short bolts to adapt to the size of the bearing case 1 and the auxiliary connecting piece 3. The fitting through the fixing screw holes 36 and the corresponding screw holes 15 can also be selected to be a pin with threads to further accommodate the length dimension and limited installation space of the bearing case 1 and the auxiliary connection 3.
As best seen in fig. 1 and 3, the second end 32 preferably includes a flange 37 extending about the pin 35, the flange 37 having a plurality of fastening holes 36. Correspondingly, the bearing case 1 is provided with a corresponding flange 17 corresponding to the flange 37 with screw holes on the auxiliary connecting piece 3. The flange 37 with screw holes and the corresponding flange 17 are arranged, so that the connection strength of the auxiliary connecting piece 3 and the bearing case can be improved.
On the basis of the above embodiment, it is preferable that a plurality of fixing screw holes 36 are circumferentially and uniformly distributed on the flange 37 of the auxiliary connecting member 3 to make the force applied more uniform. Correspondingly, a plurality of corresponding screw holes 15 are also uniformly distributed on the corresponding flange 17 of the bearing case 1 in the circumferential direction. Connect gradually a plurality of fixed screw 36 and a plurality of screw 15 that correspond through a plurality of bolts 5, can further ensure the radial load transmission that comes from the test piece on the load machine casket 1 to and the test piece and the holistic rigidity of being connected of test bench, avoid the problem that the test piece appears vibrating.
The arrangement of the fixing screw holes 36 and the corresponding screw holes 15 includes, but is not limited to, the above-mentioned embodiment, for example, in other embodiments, the number of the fixing screw holes 36 and the corresponding screw holes 15 can be selected by a worker according to the actual connection strength, or the fixing screw holes 36 are located on the ear plate extending from the outer peripheral surface of the connecting pin 35, and the bolts 5 sequentially pass through the fixing screw holes 36 located on the ear plate and the corresponding screw holes 15 located outside the bearing case 1, so as to effectively fix the auxiliary connecting member 3 and the bearing case 1.
An auxiliary support structure 10 can also be understood in connection with the above description of the auxiliary connection 3. Returning to fig. 1, the auxiliary supporting structure 10 includes a test supporting member 4, a force bearing casing 1, a supporting pin shaft 2 and an auxiliary connecting member 3, the test supporting member 4 includes an axially through matching shaft hole, the force bearing casing 1 is provided with a connecting pin hole 16, the auxiliary connecting member 3 and the force bearing casing 1 are fixedly connected through an interference fit of a connecting pin 35 and the connecting pin hole 16, and the auxiliary connecting member 3 and the test supporting member 4 are fixedly connected through the supporting pin shaft 2 penetrating through the shaft hole 33.
In a preferred embodiment, the supporting pin 2 is in clearance fit with the shaft hole 33 of the auxiliary connecting member 3, and then in interference fit with a matching shaft hole (not shown) of the test support member 4. Through the interference fit of the supporting pin shaft 2 and the test support piece 4, the supporting pin shaft 2, the auxiliary connecting piece 3 and the test support piece 4 can be fixed, and meanwhile, the connection rigidity of the test piece can also be effectively guaranteed.
Further, the support pin shaft 2 is fitted with the shaft hole 33 through a ball bearing 34 shown in fig. 2. The ball bearing 34 supports the supporting pin shaft 2, so that the motion flexibility between the supporting pin shaft 2 and the auxiliary connecting piece 3 can be increased, and the multidirectional transmission of load is realized.
Fig. 3 shows an embodiment of the force-bearing casing 1, the force-bearing casing 1 comprises a force-bearing outer casing 11, a force-bearing inner casing 12 and a plurality of force-bearing support plates 13, the force-bearing support plates 13 radially connect the force-bearing inner casing 12 and the force-bearing outer casing 11, and the connecting pin hole 16 is arranged on the force-bearing outer casing 11 and is preferably positioned near the force-bearing support plates 13. By arranging the connecting pin hole 16 near the bearing support plate 13, when a test piece on the bearing casing 1 works, the load from the rotor is sequentially transmitted to the auxiliary connecting piece 3 along a radial path of the bearing inner casing 12, the bearing support plate 13 and the bearing outer casing 11, and then transmitted to the test support piece 4 to a test bench, so that the working load of the test piece is effectively transmitted, the connection rigidity between components on a main force transmission path of a test piece rotor-support system is prevented from being changed in work, and the unexpected whole machine vibration condition in the working process of the test piece is avoided.
Preferably, the bottom of the test support 4 is provided with a slide rail (not shown in the figure), and the test bed provides a slide rail matched with the slide rail at the bottom of the test support 4, so that the position of the test support 4 on the test bed can be adjusted to adapt to engine test pieces with different sizes. For example, when a test piece with a long axial length is replaced, the test support 4 is moved outwards along the axial direction to bear the test piece with the long axial length, so that the auxiliary support structure 10 has universality as a whole and can be applied to test pieces with various specifications.
On the basis of the above embodiment, further, the slide rail may provide movement in a first direction and a second direction, which intersect each other, so that the test support 4 can move in multiple directions, such as an axial direction and/or a radial direction of the test piece, thereby improving flexibility of movement and increasing a range of movement to accommodate test pieces of various sizes.
The auxiliary supporting structure can be used for test parts such as performance test pieces of the multistage axial flow compressor of the aircraft engine, the rigidity of the test pieces can be effectively increased by adding the auxiliary supporting structure between the original front main support and the original rear main support, and the vibration problem in the test is avoided.
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. For example, for the diameter of the connection pin, the appropriate size can be selected by the worker according to the specific connection strength of the test piece during the experiment; for another example, the test support is provided with a screw rod and other components capable of moving along the axis direction of the test support, so that the moving range of the auxiliary support structure is further expanded, and the test support is suitable for test pieces with more sizes. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.
Claims (12)
1. Auxiliary connection spare (3) for connect load machine casket (1) and experimental support piece (4), its characterized in that includes:
a first end (31) including a shaft bore (33); and
a second end (32) comprising a connection pin (35);
wherein the bearing case (1) is provided with a connecting pin hole (16) corresponding to the connecting pin (35),
the second end (32) is used for passing through the connecting pin (35) with the interference fit of connecting pin hole (16), and then with load-bearing machine case (1) fixed connection, first end (31) be used for through shaft hole complex supporting pin axle (2) with experimental support piece (4) fixed connection.
2. The auxiliary connection (3) according to claim 1, characterized in that said second end (32) further comprises a plurality of fixing screw holes (36) surrounding said connection pin (35), said messenger case (1) providing corresponding screw holes (15) corresponding to said plurality of fixing screw holes (36), a plurality of bolts (5) radially passing through said plurality of fixing screw holes (36) and said plurality of corresponding screw holes (15) respectively to fasten said second end (32) and said messenger case (1).
3. Auxiliary connecting element (3) according to claim 2, wherein said second end (32) comprises a flange (37) extending centrally around said connecting pin (35), said flange (37) being provided with said plurality of fastening screws (36).
4. Auxiliary connecting element (3) according to claim 3, characterized in that said fastening screw holes (36) are evenly distributed circumferentially on said flange (37).
5. The auxiliary connection piece (3) as claimed in claim 1, characterized in that the shaft bore (33) extends in the axial direction of the bearing case (1), and the connecting pin (35) projects in the radial direction of the bearing case (1).
6. Auxiliary support structure (10), characterized in that it comprises a test support (4), a bearing case (1), a support pin (2) and an auxiliary connection (3) according to any one of claims 1 to 5,
the test support (4) comprises a matching shaft hole which axially penetrates through,
the bearing case (1) is provided with a connecting pin hole (16),
the auxiliary connecting piece (3) is fixedly connected with the force bearing casing (1) through the connecting pin (35) and the connecting pin hole (16) in an interference fit mode, and the auxiliary connecting piece (3) is fixedly connected with the test supporting piece (4) through the supporting pin shaft (2) penetrating through the shaft hole (33).
7. The auxiliary support structure (10) of claim 6, wherein the force-bearing casing (1) further comprises a force-bearing outer casing (11), a force-bearing inner casing (12) and a plurality of force-bearing support plates (13), the plurality of force-bearing support plates (13) radially connect the force-bearing inner casing (12) and the force-bearing outer casing (11), and the connecting pin holes (16) are arranged on the force-bearing outer casing (11) and are positioned near the force-bearing support plates (13).
8. Auxiliary support structure (10) according to claim 6, wherein said support pin (2) is interference fitted with said fitting axial hole on said test support (4).
9. Auxiliary support structure (10) according to claim 6, characterized in that said supporting pin (2) is clearance fitted with said axial hole (33) of said auxiliary connection element (3).
10. Auxiliary support structure (10) according to claim 9, characterized in that said support pin (2) cooperates with said axial hole (33) by means of a ball bearing (34).
11. Auxiliary support structure (10) according to claim 6, characterized in that at the bottom of said test support (4) there are provided slide rails for adjusting the position of said test support (4).
12. Auxiliary support structure (10) according to claim 11, wherein said slide rails provide movement in a first direction and a second direction, said first direction and said second direction intersecting each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532081.XA CN112943672B (en) | 2021-05-17 | 2021-05-17 | Auxiliary connecting piece and auxiliary supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110532081.XA CN112943672B (en) | 2021-05-17 | 2021-05-17 | Auxiliary connecting piece and auxiliary supporting structure |
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| CN112943672A true CN112943672A (en) | 2021-06-11 |
| CN112943672B CN112943672B (en) | 2021-08-03 |
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| CN202110532081.XA Active CN112943672B (en) | 2021-05-17 | 2021-05-17 | Auxiliary connecting piece and auxiliary supporting structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU485342A1 (en) * | 1973-04-05 | 1975-09-25 | Предприятие П/Я В-2504 | Test bench for compressor stages |
| US4511112A (en) * | 1982-03-22 | 1985-04-16 | Chrysler Corporation | Engine test stand |
| CN108362501A (en) * | 2017-12-27 | 2018-08-03 | 中国航发四川燃气涡轮研究院 | A kind of rack installation method for aviation axial flow compressor performance test |
| CN108709748A (en) * | 2018-05-31 | 2018-10-26 | 中国民航大学 | Small aero multiple spot impact-rub malfunction analogue experiment installation |
| CN209261881U (en) * | 2018-12-27 | 2019-08-16 | 德州科瑞特风机有限公司 | Axial flow blower damped noise reduction device |
| CN111993003A (en) * | 2020-06-30 | 2020-11-27 | 中国航发南方工业有限公司 | Auxiliary assembly device for transmission frame assembly |
-
2021
- 2021-05-17 CN CN202110532081.XA patent/CN112943672B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU485342A1 (en) * | 1973-04-05 | 1975-09-25 | Предприятие П/Я В-2504 | Test bench for compressor stages |
| US4511112A (en) * | 1982-03-22 | 1985-04-16 | Chrysler Corporation | Engine test stand |
| CN108362501A (en) * | 2017-12-27 | 2018-08-03 | 中国航发四川燃气涡轮研究院 | A kind of rack installation method for aviation axial flow compressor performance test |
| CN108709748A (en) * | 2018-05-31 | 2018-10-26 | 中国民航大学 | Small aero multiple spot impact-rub malfunction analogue experiment installation |
| CN209261881U (en) * | 2018-12-27 | 2019-08-16 | 德州科瑞特风机有限公司 | Axial flow blower damped noise reduction device |
| CN111993003A (en) * | 2020-06-30 | 2020-11-27 | 中国航发南方工业有限公司 | Auxiliary assembly device for transmission frame assembly |
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| Publication number | Publication date |
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| CN112943672B (en) | 2021-08-03 |
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