CN113740021A - Centrifugal compressor performance test experiment table - Google Patents
Centrifugal compressor performance test experiment table Download PDFInfo
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- CN113740021A CN113740021A CN202110995326.2A CN202110995326A CN113740021A CN 113740021 A CN113740021 A CN 113740021A CN 202110995326 A CN202110995326 A CN 202110995326A CN 113740021 A CN113740021 A CN 113740021A
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- 238000002474 experimental method Methods 0.000 title claims abstract description 31
- 238000011056 performance test Methods 0.000 title claims abstract description 25
- 239000000523 sample Substances 0.000 claims abstract description 84
- 238000009434 installation Methods 0.000 claims abstract description 20
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 52
- 238000012360 testing method Methods 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract description 21
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a centrifugal compressor performance test experiment table, relates to the technical field of compressors, and mainly aims to reduce the construction difficulty and cost of the experiment table so as to facilitate experimental research of a centrifugal compressor. The centrifugal compressor performance test experiment table comprises a wind tunnel gas collecting tank, a gas inlet pipeline, a measurement structure, a gas outlet pipeline and a compressor structure to be tested; the wind tunnel gas collecting tank is communicated with an impeller outlet of the to-be-tested compressor structure through a gas inlet pipeline, and a stage outlet of the to-be-tested compressor structure is communicated with an inlet of a gas outlet pipeline; a through hole is formed in a cover plate of a compressor structure to be tested, and the angle of blades of an impeller is adjustable, so that a static guide vane matched with the impeller under a certain working condition is obtained; the measuring structure comprises an installation cylinder, a driving part arranged on the installation cylinder and a probe connected with the driving part, wherein the installation cylinder is coaxially sleeved outside the compressor structure to be tested, and the probe is inserted into a flow channel inside the compressor structure to be tested through a through hole.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a centrifugal compressor performance test experiment table.
Background
At present, numerical simulation methods such as CFD are the mainstream methods for studying centrifugal compressors, but uncertainty still exists in predicting actual flow when new geometries are studied. Particularly, when analyzing a backflow channel having an obvious three-dimensional and secondary flow phenomenon, it is difficult to obtain an accurate result by using a CFD simulation technique, and thus, CFD cannot replace an experiment.
The experimental study of centrifugal compressor model level complete machine and part performance should adopt rotatory laboratory bench, but the supporting facility of rotatory laboratory bench is numerous and the cost is high, builds the degree of difficulty higher simultaneously for centrifugal compressor is difficult to carry out experimental study.
Disclosure of Invention
In view of this, the embodiment of the invention provides a centrifugal compressor performance test experiment table, and mainly aims to reduce the construction difficulty and cost of the experiment table so as to facilitate experimental research on a centrifugal compressor.
In order to achieve the above purpose, the embodiments of the present invention mainly provide the following technical solutions:
the embodiment of the invention provides a centrifugal compressor performance test experiment table, which comprises a wind tunnel gas collecting tank, an air inlet pipeline, a measurement structure, an air outlet pipeline and a compressor structure to be tested;
the wind tunnel gas collecting tank is communicated with an impeller outlet of the compressor structure to be tested through the gas inlet pipeline, and a stage outlet of the compressor structure to be tested is communicated with an inlet of the gas outlet pipeline;
the structure of the compressor to be tested comprises a cover plate and an impeller, wherein a through hole is formed in the cover plate, and the angle of a blade of the impeller is adjustable, so that a static guide vane matched with the impeller under a certain working condition is obtained;
the measuring structure includes an installation cylinder, set up in drive division on the installation cylinder and with the probe that the drive division is connected, installation cylinder coaxial arrangement is located the outside of compressor structure that awaits measuring, the probe passes through the through-hole inserts in the inside runner of compressor structure that awaits measuring, the drive division is used for the drive the probe is followed circumference, axial and the radial motion of compressor structure that awaits measuring, so that the probe is right measuring section in the runner measures.
Further, the compressor structure to be tested is also provided with a diffuser outlet and a reflux device inlet;
the through holes comprise a first through hole corresponding to the impeller outlet, a second through hole corresponding to the diffuser outlet, a third through hole corresponding to the reflux device inlet and a fourth through hole corresponding to the stage outlet;
the probes comprise a first probe, a second probe, a third probe and a fourth probe which are sequentially inserted into the first through hole to the fourth through hole respectively;
the driving part is used for driving the first probe to the third probe to respectively move in the circumferential direction and the axial direction and driving the fourth probe to move in the circumferential direction and the radial direction.
Further, the driving part includes a first driving part including a first sliding body, a first motor, and a first link;
the first sliding body is arranged at one end of the mounting cylinder in a manner of sliding along the circumferential direction of the mounting cylinder;
the first motor is arranged on the first sliding body, and the movement direction of the output end of the first motor is consistent with the axial direction of the structure of the compressor to be tested;
the first connecting rod is connected with the output end of the first motor and arranged along the radial extension of the structure of the compressor to be tested;
the first probe and the second probe are arranged on the first connecting rod at intervals along the length direction of the first connecting rod.
Furthermore, the first sliding body is an arc-shaped body which is concentric with the structure of the compressor to be tested, and the first sliding body is provided with first meshing teeth;
the first driving part further comprises a first gear, the first gear is arranged on the installation cylinder, and the first gear is meshed with the first meshing teeth to drive the first sliding body to slide relative to the installation cylinder.
Further, the driving part further comprises a second driving part, and the second driving part comprises a second sliding body, a second motor, a third motor and a third connecting rod;
the second sliding body is arranged at the other end of the mounting cylinder in a manner of sliding along the circumferential direction of the mounting cylinder;
the second motor is arranged on the second sliding body, and the motion direction of the output end of the second motor is consistent with the axial direction of the structure of the compressor to be tested; the second connecting rod is connected with the output end of the second motor and arranged along the radial extension of the structure of the compressor to be tested;
the third motor is arranged on the second sliding body, and the motion direction of the output end of the third motor is consistent with the radial direction of the structure of the compressor to be tested;
the third probe is arranged on the second connecting rod; and the fourth probe is connected with the output end of the third motor.
Furthermore, the second sliding body is an arc-shaped body which is concentric with the structure of the compressor to be tested, and second meshing teeth are arranged on the second sliding body;
the second driving part further comprises a second gear, the second gear is arranged on the mounting cylinder, and the second gear is meshed with the second meshing teeth to drive the second sliding body to slide relative to the mounting cylinder.
Furthermore, the cover plate comprises a first cover plate positioned on the side of the impeller outlet, and a first arc-shaped guide groove and a second arc-shaped guide groove which are concentric with the structure of the compressor to be tested and are radially arranged along the structure of the compressor to be tested are arranged on the first cover plate;
the first through hole and the second through hole are arc-shaped holes which are concentric with the compressor structure to be tested, the first through hole is arranged at the bottom of the first arc-shaped guide groove, and the second through hole is arranged at the bottom of the second arc-shaped guide groove;
the centrifugal compressor performance test experiment table further comprises a first sealing plate and a second sealing plate which are both arc-shaped;
the first sealing plate is movably arranged in the first arc-shaped guide groove and blocks the first through hole; the second sealing plate is movably arranged in the second arc-shaped guide groove and blocks the second through hole;
the first sealing plate and the second sealing plate are connected with the first sliding body and can move in the first arc-shaped guide groove and the second arc-shaped guide groove along with the movement of the first sliding body;
first through holes are formed in the first sealing plate and the second sealing plate, and the first probe and the second probe sequentially penetrate through the first through holes and the second through holes correspondingly.
Furthermore, the cover plate comprises a second cover plate positioned on the side of the stage outlet, a third arc-shaped guide groove which is concentric with the structure of the compressor to be tested is arranged on the second cover plate, and a fourth arc-shaped guide groove which is concentric with the structure of the compressor to be tested is arranged on the side wall of the stage outlet;
the third through hole and the fourth through hole are arc-shaped holes which are concentric with the compressor structure to be tested; the third through hole is formed in the groove bottom of the third arc-shaped guide groove, and the fourth through hole is formed in the groove bottom of the fourth arc-shaped guide groove;
the centrifugal compressor performance test experiment table further comprises a third sealing plate and a fourth sealing plate which are arc-shaped, wherein the third sealing plate is movably arranged in the third arc-shaped guide groove and blocks the third through hole; the fourth sealing plate is movably arranged in the fourth through hole and blocks the fourth through hole;
the third sealing plate and the fourth sealing plate are connected with the second sliding body and can move in the third arc-shaped guide groove and the fourth arc-shaped guide groove respectively along with the movement of the second sliding body;
and second through holes are formed in the third sealing plate and the fourth sealing plate, and the third probe and the fourth probe sequentially penetrate through the third through hole and the fourth through hole respectively through the corresponding second through holes.
Furthermore, the air inlet pipeline comprises a first reducing section, a steady flow section and a second reducing section which are sequentially communicated in the direction from the air tunnel gas collecting tank to the compressor structure to be tested, and the second reducing section is arranged close to an impeller outlet of the compressor structure to be tested;
the inner diameter of the first reducing section is gradually increased from the wind tunnel gas collecting tank to the to-be-tested compressor structure;
a rectifying grid is arranged in the steady flow section;
the inner diameter of the second reducing section is gradually reduced from the wind tunnel gas collecting tank to the direction of the compressor structure to be tested, and the wall surface of the pipe of the second reducing section is a curved surface.
Further, the air outlet pipeline comprises a third variable diameter section, and the inner diameter of the third variable diameter section is gradually increased along the outlet direction from the to-be-tested compressor structure to the air outlet pipeline.
By means of the technical scheme, the invention at least has the following beneficial effects:
according to the experiment table for testing the performance of the centrifugal compressor, provided by the embodiment of the invention, airflow is led out from the wind tunnel gas collecting tank and enters the structure of the compressor to be tested through the air inlet pipeline, and the experimental working condition can be adjusted by adjusting the opening of the wind tunnel fan, so that the existing wind tunnel structure is relied on, active work machinery is not required, and the construction cost and difficulty of the experiment table are reduced. And according to the existing impeller structure of the compressor structure to be measured, the Mach number and the airflow angle of the outlet of the static guide vane are distributed along the spanwise direction and are consistent with those of the outlet of the original model-level impeller by changing the shape of the impeller blade, so that the static guide vane matched with the impeller under a certain working condition is obtained, the static guide vane is utilized to replace a rotating impeller, and the driving part of the measuring structure can drive the probe to move along the circumferential direction, the axial direction and the radial direction of the compressor structure to be measured, so that the probe can measure the measuring section of the flow channel in the compressor structure to be measured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a centrifugal compressor performance testing experiment table according to an embodiment of the present invention;
fig. 2 is a schematic top view of a centrifugal compressor performance testing experiment table according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a centrifugal compressor performance test experiment table according to an embodiment of the present invention, in which a rotating impeller and diffuser blades of a compressor structure to be tested are matched;
FIG. 4 is a schematic structural diagram of a centrifugal compressor performance test experiment table according to an embodiment of the present invention, in which a static guide vane of a compressor structure to be tested is matched with a diffuser blade;
fig. 5 is a schematic structural diagram of a measurement structure of a centrifugal compressor performance testing experiment table provided in an embodiment of the present invention at a first viewing angle;
fig. 6 is a schematic structural diagram of a measurement structure of a centrifugal compressor performance testing experiment table provided in an embodiment of the present invention at a second viewing angle;
FIG. 7 is a cross-sectional view of a centrifugal compressor performance testing bench provided in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of each measured cross-sectional position of a stationary guide vane of a compressor structure to be tested in a centrifugal compressor performance test experiment table according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a first cover plate of a compressor structure to be tested in a centrifugal compressor performance testing experiment table according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
As shown in fig. 1, fig. 2, fig. 5, and fig. 6, an embodiment of the present invention provides a centrifugal compressor performance test experiment table, which includes a wind tunnel gas collecting tank 1, a gas inlet pipeline 2, a measurement structure 3, a gas outlet pipeline 4, and a compressor structure 5 to be tested, and all of which may be disposed on a bracket 100; the wind tunnel gas collecting tank 1 is communicated with an impeller outlet of a compressor structure 5 to be tested through an air inlet pipeline 2, and a stage outlet of the compressor structure 5 to be tested is communicated with an inlet of an air outlet pipeline 4; the compressor structure 5 to be tested comprises a cover plate and an impeller 52, wherein a through hole is formed in the cover plate, and the angle of blades of the impeller 52 is adjustable, so that a static guide vane matched with the impeller 52 under a certain working condition is obtained; the measurement structure 3 includes an installation section of thick bamboo 31, sets up the drive division on an installation section of thick bamboo 31 and the probe of being connected with the drive division, and the outside of compressor structure 5 that awaits measuring is located to an installation section of thick bamboo 31 coaxial sleeve, and the probe inserts in the inside runner of compressor structure 5 that awaits measuring through the through-hole, the drive division is used for the drive the probe is followed the circumference, axial and the radial motion of compressor structure 5 that awaits measuring, so that the probe is right measurement cross section in the runner measures.
In the embodiment of the invention, referring to fig. 3 and 4, reference numeral 200 in fig. 3 and 4 represents diffuser blades, reference numeral 300 represents stationary guide vanes, the blade angle of the impeller 52 of the compressor structure 5 to be tested is adjustable, and the mach number and the airflow angle at the outlet of the stationary guide vanes are distributed along the spanwise direction to be consistent with the outlet of the original model-level impeller 52 by changing the shape of the blades of the impeller 52, so that the stationary guide vanes matched with the impeller 52 under a certain working condition are obtained, and further the stationary guide vanes are used for replacing the impeller 52 rotating at a high speed, so as to ensure the experimental safety and meet corresponding experimental conditions.
It should be noted that, referring to fig. 3 and 4, since the relative positions of the stationary guide vane and the diffuser have a certain influence on the flow field, in order to reduce the influence and thereby improve the measurement accuracy, in the measurement process, the stationary guide vane may be rotated to adjust the relative position between the stationary guide vane and the diffuser, that is, data of one period is measured at each different relative position between the trailing edge of the blade of the stationary guide vane and the leading edge of the blade of the diffuser, and then all the data are averaged to obtain a final measurement result, thereby improving the measurement accuracy, more accurately simulating the true flow field of the compressor, separating the steady flow from the true complex flow, and further deeply researching the internal flow characteristics of the stator component.
In an embodiment of the present invention, the probe may be a five-hole probe, and the probe may include a probe body and a rotary table for driving the probe body to rotate, and the rotary table may be a motor.
According to the experiment table for testing the performance of the centrifugal compressor, provided by the embodiment of the invention, airflow is led out from the wind tunnel gas collecting tank 1, enters the compressor structure 5 to be tested through the air inlet pipeline 2, and the experimental working condition can be adjusted by adjusting the opening degree of the wind tunnel fan, so that the existing wind tunnel structure is relied on, active work machinery is not required, and the construction cost and difficulty of the experiment table are reduced. Moreover, according to the existing impeller 52 structure of the compressor structure 5 to be measured, the mach number and the airflow angle of the outlet of the stationary guide vane are distributed along the spanwise direction to be consistent with the outlet of the original model-level impeller 52 by changing the shape of the blades of the impeller 52, so that the stationary guide vane matched with the impeller 52 under a certain working condition is obtained, the stationary guide vane is used for replacing the rotary impeller 52, and the driving part of the measuring structure 3 can drive the probe to move along the circumferential direction, the axial direction and the radial direction of the compressor structure 5 to be measured, so that the probe can measure the measuring section of the flow channel in the compressor structure 5 to be measured.
In an alternative embodiment, referring to fig. 5, 6, 7 and 8, the compressor structure 5 under test also has a diffuser outlet and a diffuser inlet; the through holes comprise a first through hole 511 corresponding to the outlet of the impeller 52, a second through hole 512 corresponding to the outlet of the diffuser, a third through hole 513 corresponding to the inlet of the reflux device and a fourth through hole 514 corresponding to the outlet of the stage; the probes comprise a first probe 61, a second probe 62, a third probe 63 and a fourth probe 64 which are sequentially inserted into the first through hole 511 to the fourth through hole 514 respectively; the driving part is used for driving the first probe 61 to the third probe 63 to perform circumferential and axial movements, respectively, and driving the fourth probe 64 to perform circumferential and radial movements.
In the above embodiment, the driving unit drives the first probe 61, the second probe 62, the third probe 63 and the fourth probe 64 to perform circumferential and axial displacements respectively, and simultaneously drives the fourth probe 64 to perform circumferential and radial displacements, so as to achieve synchronous real-time measurement of the outlet measurement section MP1, the diffuser outlet measurement section MP2, the return device inlet measurement section MP3 and the stage outlet measurement section MP4 of the impeller 52, reduce measurement time, reduce the influence of environmental changes on experimental results, and further improve the measurement accuracy of the experiment table.
In an alternative embodiment, referring to fig. 5 and 6, the driving part may include a first driving part 7, the first driving part 7 including a first sliding body 71, a first motor 72, and a first link 73; the first sliding body 71 is slidably provided at one end of the mounting cylinder 31 in the circumferential direction of the mounting cylinder 31; the first motor 72 is arranged on the first sliding body 71, and the moving direction of the output end of the first motor is consistent with the axial direction of the compressor structure 5 to be tested; the first connecting rod 73 is connected with the output end of the first motor 72 and arranged along the radial extension of the compressor structure 5 to be tested; the first probe 61 and the second probe 62 are disposed on the first link 73 at intervals along the longitudinal direction of the first link 73.
In the above embodiment, because the first motor 72 is disposed on the first sliding body 71, and the moving direction of the output end of the first motor 72 is consistent with the axial direction of the compressor structure 5 to be tested, the first sliding body 71 and the first motor 72 can cooperate with each other to drive the first probe 61 and the second probe 62 to perform circumferential and axial displacement, such a structural arrangement can eliminate the need to separately provide a driving mechanism for driving the first probe 61 and the second probe 62 to perform circumferential movement, the structure is simple, and the cost is further reduced.
In an alternative embodiment, referring to fig. 5 and 6, the first sliding body 71 is an arc-shaped body concentrically disposed with the compressor structure 5 to be tested, and the first sliding body 71 is provided with first engaging teeth, specifically, the first engaging teeth are disposed on a side surface of the first sliding body 71 corresponding to the first gear and are arranged along a length direction of the first sliding body 71; the first driving portion 7 further includes a first gear 74, the first gear 74 is disposed on the mounting cylinder 31, and the first gear 74 is engaged with the first engaging teeth to drive the first sliding body 71 to slide relative to the mounting cylinder 31. The first gear 74 may include a gear body and a motor for driving the gear body to rotate.
According to the above embodiment, since the first gear 74 is engaged with the engaging teeth on the first sliding body 71, when the first gear 74 rotates, the first sliding body 71 can slide along the circumferential direction of the mounting cylinder 31, so as to drive the first motor 72 to move circumferentially, and the structure is simple and reliable.
In the above embodiment, a first step-shaped sliding groove 311 extending along the circumferential direction of the mounting cylinder 31 may be disposed at one end of the mounting cylinder, and an arc length of the first step-shaped sliding groove 311 is greater than an arc length of the first sliding body 71, and a plurality of first sliding hook bodies 312 disposed at intervals along the length direction of the first step-shaped sliding groove 311 may be disposed at the first step-shaped sliding groove 311; meanwhile, a first step 711 extending along the length direction of the first sliding body 71 is arranged on one side of the first sliding body 71, the first step 711 is in sliding fit with the first step 711-shaped sliding groove 311, a first groove 712 extending along the length direction of the first sliding body is arranged on the side, away from the side where the first step 711 is arranged, of the first sliding body 71, and the first sliding hook 312 is inserted into the first groove 712 and is in sliding fit with the first groove 712, so that the first sliding body 71 can be slidably arranged on the mounting tube 31. The first step 711 is matched with the first step 711-shaped sliding groove 311, and the first groove 712 is matched with the first sliding hook 312, so that the sliding arrangement of the first sliding body 71 on the installation cylinder 31 is realized, the axial and circumferential limiting of the first sliding body 71 on the installation cylinder 31 is also realized, the structure is simple, and the use is reliable.
In an alternative embodiment, referring to fig. 5 and 6, the driving part further includes a second driving part 8, and the second driving part 8 includes a second sliding body 81, a second motor 82, a third motor 83 and a second connecting rod 84; the second sliding body 81 is slidably provided at the other end of the mounting cylinder 31 in the circumferential direction of the mounting cylinder 31; the second motor 82 is arranged on the second sliding body 81, and the moving direction of the output end of the second motor is consistent with the axial direction of the compressor structure 5 to be tested; the second connecting rod 84 is connected with the output end of the second motor 82 and arranged along the radial extension of the compressor structure 5 to be tested; the third motor 83 is arranged on the second sliding body 81, and the moving direction of the output end of the third motor is consistent with the radial direction of the compressor structure 5 to be tested; the third probe 63 is disposed on the second link 84; the fourth probe 64 is connected to the output of the third motor 83.
In the above embodiment, because the second motor 82 and the third motor 83 are disposed on the second sliding body 81, the moving direction of the output end of the second motor 82 is consistent with the axial direction of the compressor structure 5 to be tested, and the moving direction of the output end of the third motor 83 is consistent with the radial direction of the compressor structure 5 to be tested, the second sliding body 81, the second motor 82, and the third motor 83 can cooperate with each other to drive the third probe 63 to perform circumferential and circumferential displacement, and drive the fourth probe 64 to perform circumferential and radial displacement, such a structural arrangement can eliminate the need to separately provide a driving mechanism for driving the first probe 61 and the second probe 62 to perform circumferential movement, and has a simple structure, and further reduces the cost.
In an alternative embodiment, referring to fig. 5 and 6, the second sliding body 81 is an arc-shaped body concentrically disposed with the compressor structure 5 to be tested, and the second sliding body 81 is provided with second engaging teeth, specifically, the second engaging teeth are disposed on a side surface of the second sliding body 81 corresponding to the second gear and are arranged along a length direction of the second sliding body 81; the second driving portion 8 further includes a second gear disposed on the mounting cylinder 31, and the second gear is engaged with the second engaging teeth to drive the second sliding body 81 to slide relative to the mounting cylinder 31. Wherein, the second gear can include the gear body and be used for the rotatory motor of drive gear body.
According to the above embodiment, since the second gear is engaged with the engaging teeth on the second sliding body 81, when the second gear rotates, the second sliding body 81 can slide along the circumferential direction of the mounting cylinder 31, so as to drive the second motor 82 and the third motor 83 to move circumferentially, and the structure is simple and the use is reliable.
In the above embodiment, the other end of the mounting cylinder 31 may be provided with a second stepped sliding groove 313 extending along the circumferential direction thereof, and the arc length of the second stepped sliding groove 313 is greater than the arc length of the second sliding body 81, and a plurality of second sliding hooks 314 arranged at intervals along the length direction thereof may also be arranged at the second stepped sliding groove 313; meanwhile, a second step 811 extending along the length direction of the second sliding body 81 may also be disposed on one side of the second sliding body 81, the second step 811 is in sliding fit with the second step 811-shaped sliding groove 313, a second groove 812 extending along the length direction of the second sliding body 81 is disposed on a side of the second sliding body 81 away from the side where the second step 811 is located, and the second sliding hook 314 is inserted into the second groove 812 and is in sliding fit with the second groove 812, so that the second sliding body 81 can be slidably disposed on the mounting tube 31. The second step 811 is matched with the second step 811-shaped sliding groove 313, and the second groove 812 is matched with the second sliding hook 314, so that the sliding arrangement of the second sliding body 81 on the installation cylinder 31 is realized, the axial and circumferential limiting of the second sliding body 81 on the installation cylinder 31 is also realized, and the structure is simple and the use is reliable.
In an alternative embodiment, referring to fig. 5, 6 and 9, the cover plate includes a first cover plate 51 located at the side of the impeller outlet, and the first cover plate 51 is provided with a first arc-shaped guide slot 511 and a second arc-shaped guide slot 512 which are concentrically arranged with the compressor structure to be tested and are arranged along the radial direction of the compressor structure to be tested; the first through hole 515 and the second through hole 516 are both arc-shaped holes concentrically arranged with the structure of the compressor to be tested, the first through hole 515 is arranged at the bottom of the first arc-shaped guide groove 511, and the second through hole 516 is arranged at the bottom of the second arc-shaped guide groove 512; the centrifugal compressor performance test experiment table further comprises a first sealing plate 91 and a second sealing plate 92 which are both arc-shaped; the first sealing plate 91 is movably arranged in the first arc-shaped guide groove 511 and blocks the first through hole 515; the second sealing plate 92 is movably arranged in the second arc-shaped guide groove 512 and blocks the second through hole 516; the first sealing plate 91 and the second sealing plate 92 are connected with the first sliding body 71 and can move in the first arc-shaped guide groove 511 and the second arc-shaped guide groove 512 along with the movement of the first sliding body 71; the first sealing plate 91 and the second sealing plate 92 are both provided with first through holes, and the first probe 61 and the second probe 62 sequentially pass through the first through hole 515 and the second through hole 516 respectively through the corresponding first through holes.
In the above embodiment, by providing the first arc-shaped guide groove 511 and the second arc-shaped guide groove 512, and the first sealing plate 91 and the second sealing plate 92, it is possible to block the first through hole 515 and the second through hole 516 in the measurement process, so as to avoid the occurrence of air leakage at the first through hole 515 and the second through hole 516, thereby ensuring the measurement accuracy of each measurement cross-section flow field.
In an alternative embodiment, referring to fig. 5 and 6, the cover plate includes a second cover plate 53 located at the side of the stage outlet, the second cover plate 53 is provided with a third arc-shaped guide slot 513 concentrically arranged with the compressor structure to be tested, and the side wall of the stage outlet is provided with a fourth arc-shaped guide slot 514 concentrically arranged with the compressor structure to be tested; the third through hole and the fourth through hole are arc-shaped holes which are concentric with the structure of the compressor to be tested; the third through hole is formed in the bottom of the third arc-shaped guide groove 513, and the fourth through hole is formed in the bottom of the fourth arc-shaped guide groove 514; the centrifugal compressor performance test experiment table further comprises a third sealing plate 93 and a fourth sealing plate 94 which are both arc-shaped, wherein the third sealing plate 93 is movably arranged in the third arc-shaped guide groove 513 and plugs the third through hole; the fourth sealing plate 94 is movably arranged in the fourth arc-shaped guide groove 514 and blocks the fourth through hole; the third sealing plate 93 and the fourth sealing plate 94 are connected with the second sliding body 81 and can move in the third arc-shaped guide groove 513 and the fourth arc-shaped guide groove 514 along with the movement of the second sliding body 81; the third sealing plate 93 and the fourth sealing plate 94 are both provided with second through holes, and the third probe 63 and the fourth probe 64 sequentially pass through the third through hole and the fourth through hole respectively through the corresponding second through holes.
In the above embodiment, the third arc-shaped guide groove 513, the fourth arc-shaped guide groove 514, the third sealing plate 93 and the fourth sealing plate 94 are arranged, so that the third through hole 513 and the fourth through hole 514 can be blocked in the measuring process, the air leakage phenomenon at the third through hole 513 and the fourth through hole 514 is avoided, and the measuring accuracy of each measuring section flow field is ensured.
In an alternative embodiment, referring to fig. 1, the air intake pipeline 2 may include a first reducing section 21, a steady flow section 22 and a second reducing section 23 which are sequentially communicated in a direction from the air tunnel air collecting tank 1 to the compressor structure 5 to be tested, the second reducing section 23 is disposed near an outlet of the impeller 52 of the compressor structure 5 to be tested, and an inner diameter of the first reducing section 21 is gradually increased in a direction from the air tunnel air collecting tank 1 to the compressor structure 5 to be tested, so as to achieve the purpose of pressure expansion and speed reduction, thereby reducing the flow velocity of the air flow; the flow stabilizing section 22 is internally provided with a flow rectifier grid which is used for stabilizing an incoming flow field, the inner diameter of the second reducing section 23 is gradually reduced from the wind tunnel gas collecting tank 1 to the direction of the compressor structure 5 to be measured so as to increase the flow velocity of the air flow, the wall surface of the second reducing section 23 is a curved surface so as to reduce the loss caused by the air flow, the flow velocity is moderate and the flow loss is small finally, the stable air flow in the flow field is conveyed into the compressor structure 5 to be measured, and the two-dimensional flow field of the measuring section of the stator component in the compressor structure 5 to be measured is convenient to measure.
In an alternative embodiment, see fig. 1, the outlet duct 4 comprises a third variable-diameter section 41, the internal diameter of which section 41 increases progressively in the direction from the compressor structure 5 to be tested to the outlet of the outlet duct 4, so as to facilitate the outflow of the gas.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A centrifugal compressor performance test experiment table is characterized by comprising a wind tunnel gas collecting tank, an air inlet pipeline, a measuring structure, an air outlet pipeline and a compressor structure to be tested;
the wind tunnel gas collecting tank is communicated with an impeller outlet of the compressor structure to be tested through the gas inlet pipeline, and a stage outlet of the compressor structure to be tested is communicated with an inlet of the gas outlet pipeline;
the structure of the compressor to be tested comprises a cover plate and an impeller, wherein a through hole is formed in the cover plate, and the angle of a blade of the impeller is adjustable, so that a static guide vane matched with the impeller under a certain working condition is obtained;
the measuring structure includes an installation cylinder, set up in drive division on the installation cylinder and with the probe that the drive division is connected, installation cylinder coaxial arrangement is located the outside of compressor structure that awaits measuring, the probe passes through the through-hole inserts in the inside runner of compressor structure that awaits measuring, the drive division is used for the drive the probe is followed circumference, axial and the radial motion of compressor structure that awaits measuring, so that the probe is right measuring section in the runner measures.
2. Centrifugal compressor performance test bench of claim 1,
the structure of the compressor to be tested is also provided with a diffuser outlet and a reflux device inlet;
the through holes comprise a first through hole corresponding to the impeller outlet, a second through hole corresponding to the diffuser outlet, a third through hole corresponding to the reflux device inlet and a fourth through hole corresponding to the stage outlet;
the probes comprise a first probe, a second probe, a third probe and a fourth probe which are sequentially inserted into the first through hole to the fourth through hole respectively;
the driving part is used for driving the first probe to the third probe to respectively move in the circumferential direction and the axial direction and driving the fourth probe to move in the circumferential direction and the radial direction.
3. The centrifugal compressor performance test bench of claim 2,
the driving part comprises a first driving part which comprises a first sliding body, a first motor and a first connecting rod;
the first sliding body is arranged at one end of the mounting cylinder in a manner of sliding along the circumferential direction of the mounting cylinder;
the first motor is arranged on the first sliding body, and the movement direction of the output end of the first motor is consistent with the axial direction of the structure of the compressor to be tested;
the first connecting rod is connected with the output end of the first motor and arranged along the radial extension of the structure of the compressor to be tested;
the first probe and the second probe are arranged on the first connecting rod at intervals along the length direction of the first connecting rod.
4. The centrifugal compressor performance test bench of claim 3,
the first sliding body is an arc-shaped body which is concentric with the structure of the compressor to be tested, and first meshing teeth are arranged on the first sliding body;
the first driving part further comprises a first gear, the first gear is arranged on the installation cylinder, and the first gear is meshed with the first meshing teeth to drive the first sliding body to slide relative to the installation cylinder.
5. The centrifugal compressor performance test bench of claim 2,
the driving part further comprises a second driving part, and the second driving part comprises a second sliding body, a second motor, a third motor and a third connecting rod;
the second sliding body is arranged at the other end of the mounting cylinder in a manner of sliding along the circumferential direction of the mounting cylinder;
the second motor is arranged on the second sliding body, and the motion direction of the output end of the second motor is consistent with the axial direction of the structure of the compressor to be tested; the second connecting rod is connected with the output end of the second motor and arranged along the radial extension of the structure of the compressor to be tested;
the third motor is arranged on the second sliding body, and the motion direction of the output end of the third motor is consistent with the radial direction of the structure of the compressor to be tested;
the third probe is arranged on the second connecting rod; and the fourth probe is connected with the output end of the third motor.
6. Centrifugal compressor performance testing bench of claim 5,
the second sliding body is an arc-shaped body which is concentric with the structure of the compressor to be tested, and second meshing teeth are arranged on the second sliding body;
the second driving part further comprises a second gear, the second gear is arranged on the mounting cylinder, and the second gear is meshed with the second meshing teeth to drive the second sliding body to slide relative to the mounting cylinder.
7. The centrifugal compressor performance test bench of claim 3,
the cover plate comprises a first cover plate positioned on the side of the impeller outlet, and a first arc-shaped guide groove and a second arc-shaped guide groove which are concentric with the structure of the compressor to be tested and are arranged along the radial direction of the structure of the compressor to be tested are arranged on the first cover plate;
the first through hole and the second through hole are arc-shaped holes which are concentric with the compressor structure to be tested, the first through hole is arranged at the bottom of the first arc-shaped guide groove, and the second through hole is arranged at the bottom of the second arc-shaped guide groove;
the centrifugal compressor performance test experiment table further comprises a first sealing plate and a second sealing plate which are both arc-shaped;
the first sealing plate is movably arranged in the first arc-shaped guide groove and blocks the first through hole; the second sealing plate is movably arranged in the second arc-shaped guide groove and blocks the second through hole;
the first sealing plate and the second sealing plate are connected with the first sliding body and can move in the first arc-shaped guide groove and the second arc-shaped guide groove along with the movement of the first sliding body;
first through holes are formed in the first sealing plate and the second sealing plate, and the first probe and the second probe sequentially penetrate through the first through holes and the second through holes correspondingly.
8. Centrifugal compressor performance testing bench of claim 5,
the cover plate comprises a second cover plate positioned on the side of the stage outlet, a third arc-shaped guide groove which is concentric with the compressor structure to be detected is arranged on the second cover plate, and a fourth arc-shaped guide groove which is concentric with the compressor structure to be detected is arranged on the side wall of the stage outlet;
the third through hole and the fourth through hole are arc-shaped holes which are concentric with the compressor structure to be tested; the third through hole is formed in the groove bottom of the third arc-shaped guide groove, and the fourth through hole is formed in the groove bottom of the fourth arc-shaped guide groove;
the centrifugal compressor performance test experiment table further comprises a third sealing plate and a fourth sealing plate which are arc-shaped, wherein the third sealing plate is movably arranged in the third arc-shaped guide groove and blocks the third through hole; the fourth sealing plate is movably arranged in the fourth arc-shaped guide groove and blocks the fourth through hole;
the third sealing plate and the fourth sealing plate are connected with the second sliding body and can move in the third arc-shaped guide groove and the fourth arc-shaped guide groove respectively along with the movement of the second sliding body;
and second through holes are formed in the third sealing plate and the fourth sealing plate, and the third probe and the fourth probe sequentially penetrate through the third through hole and the fourth through hole respectively through the corresponding second through holes.
9. Centrifugal compressor performance test bench of claim 1,
the air inlet pipeline comprises a first reducing section, a steady flow section and a second reducing section which are sequentially communicated along the direction from the air collecting tank of the wind tunnel to the compressor structure to be tested, and the second reducing section is arranged close to an impeller outlet of the compressor structure to be tested;
the inner diameter of the first reducing section is gradually increased from the wind tunnel gas collecting tank to the to-be-tested compressor structure;
a rectifying grid is arranged in the steady flow section;
the inner diameter of the second reducing section is gradually reduced from the wind tunnel gas collecting tank to the direction of the compressor structure to be tested, and the wall surface of the pipe of the second reducing section is a curved surface.
10. Centrifugal compressor performance test bench of claim 1,
the air outlet pipeline comprises a third variable-diameter section, and the inner diameter of the third variable-diameter section is gradually increased along the outlet direction from the to-be-tested compressor structure to the air outlet pipeline.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6027305A (en) * | 1997-08-13 | 2000-02-22 | Virginia Tech Intellectual Properties, Inc. | Method and apparatus for reducing high-cycle fatigue and suppressing noise in rotating machinery |
| CN201526473U (en) * | 2009-10-23 | 2010-07-14 | 上海鼓风机厂有限公司 | Axial flow compressor formed by connecting a plurality of single-stage axial flow fans in series |
| CN104343734A (en) * | 2014-09-05 | 2015-02-11 | 北京动力机械研究所 | Centrifugal compressor |
| CN204921480U (en) * | 2015-08-25 | 2015-12-30 | 浙江理工大学 | Centrifugal compressor model level |
| CN206300685U (en) * | 2016-12-30 | 2017-07-04 | 大连透平机械技术发展有限公司 | Leaf grating runner flow field survey transmission device |
| CN106989932A (en) * | 2016-12-31 | 2017-07-28 | 重庆大学 | Measure the three-dimensional air feeders gearshift of fanjet interstage flow multi-section aerodynamic parameter |
| CN109684750A (en) * | 2018-12-27 | 2019-04-26 | 中国船舶重工集团公司第七0三研究所 | A kind of compressor model modeling method for helium turbine |
| CN109696288A (en) * | 2018-12-03 | 2019-04-30 | 中国辐射防护研究院 | A kind of simulation tests in environment wind tunnel device and its experiment detection method |
| CN209818115U (en) * | 2019-05-16 | 2019-12-20 | 广东索特能源科技有限公司 | Supersonic centripetal turbine |
| FR3087266A1 (en) * | 2018-10-16 | 2020-04-17 | Safran Aircraft Engines | DEVICE FOR MEASURING PARAMETERS OF A SEGMENTED AERODYNAMIC FLOW, TURBOMACHINE VEIN EQUIPPED WITH SUCH A MEASUREMENT DEVICE AND TURBOMACHINE COMPRISING SUCH A DEVICE OR SUCH A VEIN |
| CN212082771U (en) * | 2020-01-20 | 2020-12-04 | 北京航空航天大学 | Full-parameter probe for measuring two-dimensional steady-state flow field of boundary layer of outer wall of hub |
| CN212082825U (en) * | 2020-01-20 | 2020-12-04 | 北京航空航天大学 | Full-parameter probe for measuring high subsonic three-dimensional steady flow field |
-
2021
- 2021-08-27 CN CN202110995326.2A patent/CN113740021A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6027305A (en) * | 1997-08-13 | 2000-02-22 | Virginia Tech Intellectual Properties, Inc. | Method and apparatus for reducing high-cycle fatigue and suppressing noise in rotating machinery |
| CN201526473U (en) * | 2009-10-23 | 2010-07-14 | 上海鼓风机厂有限公司 | Axial flow compressor formed by connecting a plurality of single-stage axial flow fans in series |
| CN104343734A (en) * | 2014-09-05 | 2015-02-11 | 北京动力机械研究所 | Centrifugal compressor |
| CN204921480U (en) * | 2015-08-25 | 2015-12-30 | 浙江理工大学 | Centrifugal compressor model level |
| CN206300685U (en) * | 2016-12-30 | 2017-07-04 | 大连透平机械技术发展有限公司 | Leaf grating runner flow field survey transmission device |
| CN106989932A (en) * | 2016-12-31 | 2017-07-28 | 重庆大学 | Measure the three-dimensional air feeders gearshift of fanjet interstage flow multi-section aerodynamic parameter |
| FR3087266A1 (en) * | 2018-10-16 | 2020-04-17 | Safran Aircraft Engines | DEVICE FOR MEASURING PARAMETERS OF A SEGMENTED AERODYNAMIC FLOW, TURBOMACHINE VEIN EQUIPPED WITH SUCH A MEASUREMENT DEVICE AND TURBOMACHINE COMPRISING SUCH A DEVICE OR SUCH A VEIN |
| CN109696288A (en) * | 2018-12-03 | 2019-04-30 | 中国辐射防护研究院 | A kind of simulation tests in environment wind tunnel device and its experiment detection method |
| CN109684750A (en) * | 2018-12-27 | 2019-04-26 | 中国船舶重工集团公司第七0三研究所 | A kind of compressor model modeling method for helium turbine |
| CN209818115U (en) * | 2019-05-16 | 2019-12-20 | 广东索特能源科技有限公司 | Supersonic centripetal turbine |
| CN212082771U (en) * | 2020-01-20 | 2020-12-04 | 北京航空航天大学 | Full-parameter probe for measuring two-dimensional steady-state flow field of boundary layer of outer wall of hub |
| CN212082825U (en) * | 2020-01-20 | 2020-12-04 | 北京航空航天大学 | Full-parameter probe for measuring high subsonic three-dimensional steady flow field |
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