CN212693196U - Balance force measuring device for test with high-pressure sealing transverse jet flow effect - Google Patents
Balance force measuring device for test with high-pressure sealing transverse jet flow effect Download PDFInfo
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- CN212693196U CN212693196U CN202022019922.0U CN202022019922U CN212693196U CN 212693196 U CN212693196 U CN 212693196U CN 202022019922 U CN202022019922 U CN 202022019922U CN 212693196 U CN212693196 U CN 212693196U
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- 238000007789 sealing Methods 0.000 title claims abstract description 213
- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 230000000694 effects Effects 0.000 title claims abstract description 56
- 238000005096 rolling process Methods 0.000 claims abstract description 48
- 230000007704 transition Effects 0.000 claims description 28
- 238000005259 measurement Methods 0.000 abstract description 3
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- 230000003068 static effect Effects 0.000 description 5
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- 239000007921 spray Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
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Abstract
The utility model discloses a balance measuring force device for taking high-pressure seal horizontal jet effect to test. The balance force measuring device adopts a rod balance, a central axis of the rod balance is provided with a mandrel, an airflow channel is arranged on the central axis of the mandrel, the front end of the airflow channel is communicated with high-pressure air, and the rear end of the airflow channel is communicated with a transverse jet flow nozzle of a rear section model; the mandrel is sleeved with a front balance, a supporting beam and a rear balance in sequence from front to back; 2 pairs of angular contact bearings are respectively arranged between the front balance and the rear balance and between the rear balance and the mandrel; the front-level and the rear-level are five-component force-measuring balances which are used for measuring the normal force, the pitching moment, the lateral force, the yawing moment and the rolling moment of the front-level model and the rear-level model respectively. The force measuring balance can ensure that the precise measurement of the aerodynamic characteristics of the aircraft under the state of the jet flow effect is realized on the premise of good dynamic sealing performance, and the fine development level of the aircraft is further improved.
Description
Technical Field
The utility model belongs to the technical field of the high-speed wind-tunnel test, concretely relates to a balance measuring force device for taking high-pressure seal horizontal jet effect to test.
Background
In a high-speed wind tunnel, a special test device needs to be designed in order to complete a transverse jet effect test with a high-pressure seal. The prior test device usually adopts a balance, a mandrel and a bearing to measure the pneumatic characteristics of the model, but the test device needs further improvement and has the following defects: firstly, the jet effect of the aircraft cannot be simulated, so that the test state and the real flight state have larger difference, and for most aircraft with the jet function, accurate pneumatic data cannot be obtained through the test device; secondly, one balance is adopted to measure the pneumatic characteristics of the front section model and the rear section model simultaneously and respectively, under the condition without a mandrel, the front section and the rear section of the balance can share one fixed supporting section with relatively weak rigidity to cause large interference between the front section and the rear section, and the interference needs to be corrected by complex static calibration and data processing, so that the structural design complexity of the balance calibration device and the working strength of balance calibration are increased.
Currently, there is a need to develop a balance force measuring device for testing the transverse jet effect with high pressure sealing.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a balance measuring force device for taking high-pressure seal horizontal jet effect test is provided.
The utility model discloses a balance measuring force device for taking high-pressure seal horizontal jet effect test, its characteristics are, balance measuring force device adopt rod-type balance, be provided with the dabber on the central axis of rod-type balance, be provided with the air current passageway on the central axis of dabber, the front end of air current passageway communicates highly-compressed air, the rear end of air current passageway communicates the horizontal jet nozzle of back end model;
the mandrel is sleeved with a front balance, a supporting beam and a rear balance in sequence from front to back; a front balance angle contact bearing pair II and a front balance angle contact bearing pair I are sequentially arranged between the front balance and the mandrel from front to back; a rear balance angle contact bearing pair II and a rear balance angle contact bearing pair I are sequentially arranged between the rear balance and the mandrel from back to front;
the front horizon and the rear horizon are five-component measuring force balances, the front horizon measures the normal force, the pitching moment, the lateral force, the yawing moment and the rolling moment of the front section model, and the rear horizon measures the normal force, the pitching moment, the lateral force, the yawing moment and the rolling moment of the rear section model.
The aircraft model is divided into a front section model and a rear section model, the front section model is sleeved on the front balance of the mandrel through the front section model connecting end of the front end of the mandrel, and the rear section model is sleeved on the rear balance of the mandrel through the rear section model connecting end of the rear end of the mandrel.
Furthermore, the front balance is of a hollow rod type structure and sequentially comprises a front balance fixing end, a front balance transition section, a front balance middle section and a front balance bearing installation section from back to front;
the front balance fixing end is in cylindrical clearance fit with the supporting cross beam, and the front balance fixing end is in rolling positioning with the supporting cross beam through a front balance positioning key I and a front balance positioning key II;
the circumference surface of the transition section of the front balance is provided with uniformly distributed grooves, each groove is internally provided with a through hole, a bolt matched with the supporting beam is inserted into each through hole, and the front balance is fixedly connected with the supporting beam by screwing the bolt; the end face of the front balance transition section is also provided with a sealing groove, a front balance sealing ring II is arranged in the sealing groove, and the front balance transition section is sealed with the supporting beam through the front balance sealing ring II;
the two ends of the middle section of the front balance are respectively connected with a front part measuring element of the front balance and a rear part measuring element of the front balance; the front part measuring element of the front balance consists of a front balance normal force measuring beam I, a front balance lateral force and rolling moment measuring beam I, a front balance normal force measuring beam II and a front balance lateral force and rolling moment measuring beam II; the rear part measuring element of the front balance consists of a front balance pitching moment measuring beam I, a front balance yawing moment and rolling moment measuring beam I, a front balance pitching moment measuring beam II and a front balance yawing moment and rolling moment measuring beam II;
a shaft sleeve is further arranged between the front balance angle contact bearing pair II and the front balance angle contact bearing pair I between the front balance bearing mounting section and the mandrel; the front end of the front balance bearing mounting section is sleeved with a front balance bearing end cover, a front balance sealing end cover I and a front balance sealing end cover II in sequence from back to front; the front balance bearing end cover and the front balance bearing mounting section are tightly fixed through screws I which are uniformly distributed along the circumferential direction; the front balance sealing end cover I and the front balance bearing mounting section are tightly fixed through screws II which are uniformly distributed in the circumferential direction, and are sealed through a front balance sealing ring I; a sealing ring I, a sealing baffle ring I and a sealing ring II are sequentially arranged between the front balance sealing end cover I and the mandrel from back to front; the front balance sealing end cover II and the front balance sealing end cover I are tightly fixed through screws III which are uniformly distributed in the circumferential direction.
Furthermore, the former Tianping end cover I is a step end cover, the big end is the former Tianping end cover I connecting end, and the small end is the former Tianping end cover I sealing end.
Furthermore, the front balance seal end cover II is a step end cover, and the small end of the front balance seal end cover II is a sealing end of the front balance seal end cover II.
Furthermore, the front balance bearing end cover is a step end cover, and a through hole is formed in the large end of the front balance bearing end cover along the circumferential direction.
Furthermore, the mandrel is of a hollow rod type structure, the front section model connecting end at the front end of the mandrel is a conical section I, a threaded hole I is formed in the front section model connecting end, and the front section model is fixed in a mode that a flat key positioning screw I is connected in a conical matching manner and screwed down; the rear section model connecting end at the rear end of the mandrel is a conical section II, a threaded hole II is formed in the rear section model connecting end, and the rear section model is fixed in a mode that a flat key positioning screw II is connected in a conical matching manner and screwed down; the middle section of the mandrel is integrally an equal straight section, a raised equal straight step section is arranged in the middle of the equal straight section, the front end face of the stage is a mandrel shoulder I, and the rear end face of the stage is a mandrel shoulder II; the equal straight section of the mandrel is also provided with two groups of symmetrical high-pressure air inlets.
Further, the rear balance is of a hollow rod type structure and sequentially comprises a rear balance fixing end, a rear balance transition section, a rear balance middle section and a rear balance bearing installation section from front to back;
the rear balance fixing end is in cylindrical clearance fit with the supporting cross beam, and the rear balance fixing end and the supporting cross beam are in rolling positioning through a rear balance positioning key I and a rear balance positioning key II;
the circumference surface of the transition section of the rear balance is provided with uniformly distributed grooves, each groove is internally provided with a through hole, a bolt matched with the supporting beam is inserted into each through hole, and the rear balance is fixedly connected with the supporting beam by screwing the bolt; the end face of the rear balance transition section is also provided with a sealing groove, a rear balance sealing ring II is arranged in the sealing groove, and the front balance transition section is sealed with the supporting beam through the rear balance sealing ring II;
the two ends of the middle section of the rear balance are respectively connected with a front part measuring element of the rear balance and a rear part measuring element of the rear balance; the front part of the measuring element of the rear balance consists of a rear-sky-plane normal force measuring beam I, a rear-plane lateral force and rolling moment measuring beam I, a rear-sky-plane normal force measuring beam II and a rear-plane lateral force and rolling moment measuring beam II; the rear part of the measuring element of the rear balance consists of a rear balance pitching moment measuring beam I, a rear balance yawing moment and rolling moment measuring beam I, a rear balance pitching moment measuring beam II and a rear balance yawing moment and rolling moment measuring beam II;
the rear end of the rear balance bearing mounting section is sleeved with a rear balance bearing end cover, a rear balance sealing end cover I and a rear balance sealing end cover II in sequence from front to back; the end cover of the rear balance bearing is tightly propped and fixed with the mounting section of the rear balance bearing through screws IV which are uniformly distributed along the circumferential direction; the rear balance sealing end cover I and the rear balance bearing mounting section are tightly fixed through screws V which are uniformly distributed in the circumferential direction and are also sealed through a rear balance sealing ring I; a sealing ring III, a sealing baffle ring II and a sealing ring IV are sequentially arranged between the rear balance sealing end cover I and the mandrel from front to back; and the front balance sealing end cover II and the front balance sealing end cover I are tightly fixed through screws VI which are uniformly distributed in the circumferential direction.
Furthermore, the I sealing end cover of the skyhook is a step end cover, the big end is the I connecting end of the I sealing end cover of the skyhook, the small end is the I sealing end of the I sealing end cover of the skyhook, and the I sealing end of the sealing end cover of the skyhook is circumferentially provided with a through hole.
Furthermore, the acquired balance seal end cover II is a step end cover, and the small end of the acquired balance seal end cover II is a seal end of the acquired balance seal end cover II.
Furthermore, the rear balance bearing end cover is a step end cover, and a through hole is formed in the large end of the rear balance bearing end cover along the circumferential direction.
The utility model discloses a balance measuring force device for taking high-pressure sealed horizontal jet effect test comprises two five minutes measuring force balances, supporting beam, dabber, 4 to angular contact bearing, 2 sets of high-pressure rotary seal parts etc.. Each balance is of a hollow rod type structure, and the balance and the supporting beam are connected in a cylindrical matching and flange connection mode. The measuring element of each balance adopts a 5-column-beam structure, the middle column beam of the 5-column-beam structure is hollow, and the other 4 column beams are used for measuring components of normal force, pitching moment, lateral force, yawing moment and rolling moment. The bearing mounting section of each balance adopts two pairs of angular contact bearings, and the two pairs of angular contact bearings adopt a back-to-back mounting mode.
The utility model discloses a dabber for taking among the experimental balance force measuring device of the horizontal jet effect of high-pressure seal lets in highly-compressed air, has jet flow simulation ability for the experimental simulation key element of direct force aerodynamic force composite control is more complete, and test state is close the true flight state of aircraft more.
The utility model discloses a different positions department that is arranged in taking the experimental balance measuring force device of high-pressure seal horizontal jet effect adds and is equipped with the sealing washer, has solved the high-pressure rotary seal difficult problem, has realized the movive seal.
The utility model discloses a supporting beam rigidity that is arranged in taking the experimental balance measuring force device of high-pressure seal horizontal jet effect is big, adopts 2 balances simultaneously, measures the pneumatic characteristic of anterior segment model and back end model respectively, has reduced the complexity of balance calibrating device structural design, the working strength and the data processing degree of difficulty of balance calibration by a wide margin, has promoted the measurement precision by a wide margin.
The utility model discloses a balance measuring force device for taking high-pressure seal horizontal jet effect test can guarantee under the prerequisite that has good dynamic sealing performance, realizes that the aircraft takes the accurate measurement of pneumatic characteristic under the jet effect state, and the experimental data that obtains is more accurate, can guide the aerodynamic/flight mechanics integrated design of aircraft better, has further promoted the research level that becomes more meticulous of aircraft.
Drawings
FIG. 1a is a diagram of a balance force measuring device of the present invention for testing lateral jet effect with high pressure seal;
FIG. 1b is a diagram of the force measuring device of the balance for testing lateral jet effect with high pressure seal according to the present invention (enlarged partial view of FIG. I);
FIG. 1c is a diagram of the force measuring device of the balance for testing lateral jet effect with high pressure seal of the present invention (enlarged partial view II);
FIG. 1d is a schematic diagram of a force measuring device of a balance for testing lateral jet effect with high pressure seal according to the present invention (partially enlarged view III);
fig. 2a is a front view of a balance force measuring device with a high-pressure seal for a lateral jet effect test according to the present invention (front view);
FIG. 2b is a front view (front cross-sectional view) of a balance force measuring device of the present invention for testing lateral jet effect with high pressure seal;
FIG. 2c is a front balance structure view (A-A section view) of the balance force measuring device with high pressure seal lateral jet effect test of the present invention;
FIG. 2d is a front balance structure diagram (B-B sectional view) of the balance force measuring device with high pressure seal lateral jet effect test of the present invention;
FIG. 2e is a front balance structure diagram (C-C section view) of the balance force measuring device with high pressure seal lateral jet effect test of the present invention;
FIG. 3a is a front view of a front balance end cap I for a balance force measuring device with high pressure seal lateral jet effect test according to the present invention (front view);
FIG. 3b is a front view (main cross-sectional view) of a front balance end cap I for a balance force measuring device with high pressure seal lateral jet effect test according to the present invention;
FIG. 4a is a front view of a front balance end cap II of the present invention used in a balance force measuring device with high pressure seal lateral jet effect test (front view);
FIG. 4b is a front balance end cap II structure view (main cross-sectional view) for a balance force measuring device with high pressure seal lateral jet effect test according to the present invention;
FIG. 5a is a front view of a front balance end cap configuration for use in a balance force measuring device with high pressure seal lateral jet effect test in accordance with the present invention;
FIG. 5b is a front balance end cap structure view (main sectional view) for a balance force measuring device with high pressure seal lateral jet effect test according to the present invention;
FIG. 6 is a schematic diagram of a spindle used in a balance force measuring device with high pressure sealing for lateral jet effect test according to the present invention;
fig. 7a is a diagram of the rear balance structure (front view) of the balance force measuring device with high pressure seal for the transverse jet effect test of the present invention;
fig. 7b is a diagram of the rear balance structure (main sectional view) of the balance force measuring device with high pressure seal lateral jet effect test of the present invention;
FIG. 7c is a rear balance structure view (A-A section view) of a balance force measuring device with high pressure seal lateral spray effect test of the present invention;
FIG. 7d is a rear balance structural view (B-B sectional view) of the balance force measuring device with high pressure seal lateral spray effect test of the present invention;
FIG. 7e is a rear balance structural view (C-C sectional view) of the balance force measuring device with high pressure seal lateral spray effect test of the present invention;
fig. 8a is a structural view (front view) of a rear balance sealing end cover i used in a balance force measuring device with a high-pressure seal transverse jet effect test according to the present invention;
fig. 8b is a structural diagram (main sectional view) of a rear balance sealing end cover i used in a balance force measuring device with a high-pressure seal transverse jet effect test according to the present invention;
FIG. 9a is a rear balance end cap II structure view (front view) for a balance force measuring device with high pressure seal lateral jet effect test according to the present invention;
FIG. 9b is a schematic diagram (front cross-sectional view) of a rear balance end cap II of the present invention for a balance force measuring device with high pressure seal lateral jet effect test;
FIG. 10a is a view of the end cap of the rear balance bearing used in the balance force measuring device with high pressure seal lateral jet effect test of the present invention (front view);
FIG. 10b is a view of the end cap of the rear balance bearing used in the balance force measuring device with high pressure seal lateral jet effect test of the present invention (main cut view);
fig. 11 is a supporting beam sleeve structure diagram for a balance force measuring device with high pressure seal lateral jet effect test according to the present invention.
In the figure, 1, a front balance 2, a mandrel 3, a supporting beam 4, a rear balance 5, a rear balance angular contact bearing pair I6, a rear balance angular contact bearing pair II 7, a front balance angular contact bearing pair I8, a front balance angular contact bearing pair II 9, a front balance sealing end cover II 10, a sealing ring II 11, a front balance sealing end cover I12, a front balance bearing end cover 13, a shaft sleeve 14, a front balance sealing ring I15, a sealing ring I16, a sealing baffle ring I17, a rear balance bearing end cover 18, a rear balance sealing end cover I19, a sealing ring III 20, a rear balance sealing end cover II 21, a sealing ring IV 22, a sealing baffle ring II 23, a rear balance sealing ring I24, a front balance sealing ring II 25, a front balance sealing ring II 26, a front balance positioning key I27, a front balance positioning end 28, a front balance middle transition section 29, a front balance bearing mounting section 31, a front balance positioning key II 25, a front balance positioning key II 26, a front balance positioning key I27, a front balance positioning end 28, a front balance positioning end cover II, a front 32. Front balance pitching moment measuring beam I33, front balance yawing moment and rolling moment measuring beam I34, front balance pitching moment measuring beam II 35, front balance yawing moment and rolling moment measuring beam II 36, front balance normal force measuring beam I37, front balance lateral force and rolling moment measuring beam I38, front balance normal force measuring beam II 39, front balance lateral force and rolling moment measuring beam II 40, rear balance positioning key I41, rear balance fixing end 42, rear balance transition section 43, rear balance middle section 44, rear balance bearing mounting section 45, rear balance positioning key II 46, rear balance pitching moment measuring beam I47, rear balance yawing moment and rolling moment measuring beam I48, rear balance pitching moment measuring beam II 49, rear balance yawing moment and rolling moment measuring beam II 50, rear balance normal force measuring beam 51, rear balance lateral force and rolling moment measuring beam I52, rear balance yawing moment measuring beam I52, rear balance pitching moment measuring beam I48, rear balance yawing moment measuring beam II 49, rear balance yawing moment measuring beam II 50, rear balance normal force measuring beam II, rear balance lateral force measuring beam II The measuring beam II 53, the rear horizontal lateral force and rolling moment measuring beam II 54, the mandrel front section model connecting end 55, the mandrel shaft shoulder I56, the mandrel shaft shoulder II 57, the mandrel rear section model connecting end 58, the front balance sealing end cover I connecting end 59, the front balance sealing end cover I sealing end 60, the front balance sealing end cover II sealing end 61, the supporting beam air inlet end 62, the rear balance sealing end cover I connecting end 63, the rear balance sealing end cover I sealing end 64 and the rear balance sealing end cover II sealing end.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1a, the balance force measuring device for testing the transverse jet effect with high pressure seal of the present invention is characterized in that the balance force measuring device adopts a rod balance, a central axis of the rod balance is provided with a mandrel 2, a central axis of the mandrel 2 is provided with an airflow channel, the front end of the airflow channel is communicated with high pressure air, and the rear end of the airflow channel is communicated with a transverse jet nozzle of a rear section model;
the mandrel 2 is sleeved with a front balance 1, a supporting beam 3 and a rear balance 4 in sequence from front to back; a front balance angle contact bearing pair II 8 and a front balance angle contact bearing pair I7 are sequentially arranged between the front balance 1 and the mandrel 2 from front to back; a rear balance angle contact bearing pair II 6 and a rear balance angle contact bearing pair I5 are sequentially arranged between the rear balance 4 and the mandrel 2 from back to front;
the front balance 1 and the rear balance 4 are five-component force measuring balances, the front balance 1 measures the normal force, the pitching moment, the lateral force, the yawing moment and the rolling moment of the front section model, and the rear balance 4 measures the normal force, the pitching moment, the lateral force, the yawing moment and the rolling moment of the rear section model.
The aircraft model is divided into a front section model and a rear section model, the front section model is sleeved on the front balance 1 of the mandrel 2 through a front section model connecting end 54 at the front end of the mandrel 2, and the rear section model is sleeved on the rear balance 4 of the mandrel 2 through a rear section model connecting end 57 at the rear end of the mandrel 2.
Further, as shown in fig. 2a and 2b, the front balance 1 is a hollow rod structure, and includes, in order from back to front, a front balance fixing end 27, a front balance transition section 28, a front balance middle section 29, and a front balance bearing mounting section 30;
the front balance fixed end 27 is in cylindrical clearance fit with the supporting beam 3, and the front balance fixed end 27 and the supporting beam 3 are in rolling positioning through a front balance positioning key I26 and a front balance positioning key II 31;
as shown in fig. 1c and fig. 2c, the circumferential surface of the front balance transition section 28 is provided with uniformly distributed grooves, each groove is provided with a through hole, a bolt assembled with the supporting beam 3 is inserted into each through hole, and the front balance 1 is fixedly connected with the supporting beam 3 by screwing the bolt; the end face of the front balance transition section 28 is also provided with a sealing groove, a front balance sealing ring II 24 is installed in the sealing groove, and the front balance transition section 28 and the supporting beam 3 are sealed through the front balance sealing ring II 24;
as shown in fig. 2d and 2e, both ends of the front balance middle section 29 are respectively connected with the front part measuring element of the front balance 1 and the rear part measuring element of the front balance 1; the front part of the measuring element of the front balance 1 consists of a front balance normal force measuring beam I36, a front balance lateral force and rolling moment measuring beam I37, a front balance normal force measuring beam II 38 and a front balance lateral force and rolling moment measuring beam II 39; the rear part of the measuring element of the front balance 1 consists of a front balance pitching moment measuring beam I32, a front balance yawing moment and rolling moment measuring beam I33, a front balance pitching moment measuring beam II 34 and a front balance yawing moment and rolling moment measuring beam II 35;
as shown in fig. 1b, a shaft sleeve 13 is further installed between the front balance angle contact bearing pair ii 8 and the front balance angle contact bearing pair i 7 between the front balance bearing installation section 30 and the mandrel 2; the front end of the front balance bearing mounting section 30 is sleeved with a front balance bearing end cover 12, a front balance sealing end cover I11 and a front balance sealing end cover II 9 in sequence from back to front; the front balance bearing end cover 12 and the front balance bearing mounting section 30 are tightly fixed through screws I which are uniformly distributed along the circumferential direction; the front balance sealing end cover I11 and the front balance bearing mounting section 30 are tightly fixed through screws II which are uniformly distributed in the circumferential direction, and are sealed through a front balance sealing ring I14; a sealing ring I15, a sealing baffle ring I16 and a sealing ring II 10 are sequentially arranged between the front balance sealing end cover I11 and the mandrel 2 from back to front; the front balance sealing end cover II 9 and the front balance sealing end cover I11 are tightly fixed through screws III which are uniformly distributed in the circumferential direction.
Further, as shown in fig. 3a and 3b, the front balance seal end cover i 11 is a step end cover, the large end is a front balance seal end cover i connecting end 58, and the small end is a front balance seal end cover i sealing end 59.
Further, as shown in fig. 4a and 4b, the front balance seal end cover ii 9 is a step end cover, and the small end is a front balance seal end cover ii seal end 60.
Further, as shown in fig. 5a and 5b, the front balance bearing cover 12 is a step cover, and a through hole is formed at the large end along the circumferential direction.
Further, as shown in fig. 6, the mandrel 2 is of a hollow rod type structure, the front section model connecting end 54 at the front end of the mandrel 2 is a conical section i, a threaded hole i is formed in the front section model connecting end 54, and the front section model is fixed in a mode that a flat key positioning screw i is connected in a conical fit manner and screwed down; a rear section model connecting end 57 at the rear end of the mandrel 2 is a conical section II, a threaded hole II is formed in the rear section model connecting end 57, and a rear section model is fixed in a mode that a flat key positioning screw II is connected in a conical matching manner and screwed; the middle section of the mandrel 2 is integrally an equal straight section, a raised equal straight step section is arranged in the middle of the equal straight section, the front end face of the stage is a mandrel shoulder I55, and the rear end face of the stage is a mandrel shoulder II 56; the equal straight section of the mandrel 2 is also provided with two groups of symmetrical high-pressure air inlets.
Further, as shown in fig. 7a and 7b, the rear balance 4 is a hollow rod structure, and includes, in order from front to back, a rear balance fixing end 41, a rear balance transition section 42, a rear balance middle section 43, and a rear balance bearing mounting section 44;
the rear balance fixed end 41 and the supporting beam 3 are in cylindrical clearance fit, and the rear balance fixed end 41 and the supporting beam 3 are in rolling positioning through a rear balance positioning key I40 and a rear balance positioning key II 45;
as shown in fig. 1c and 7c, the circumferential surface of the rear balance transition section 42 is provided with uniformly distributed grooves, each groove is provided with a through hole, a bolt assembled with the supporting beam 3 is inserted into each through hole, and the rear balance 4 is fixedly connected with the supporting beam 3 by screwing the bolt; the end face of the rear balance transition section 42 is also provided with a sealing groove, a rear balance sealing ring II 25 is installed in the sealing groove, and the front balance transition section 28 and the supporting beam 3 are sealed through the rear balance sealing ring II 25;
as shown in fig. 7d and 7e, both ends of the rear balance middle section 43 are connected to the front portion measuring element of the rear balance 4 and the rear portion measuring element of the rear balance 4, respectively; the front part of the measuring element of the rear balance 4 consists of a rear balance normal force measuring beam I50, a rear balance lateral force and rolling moment measuring beam I51, a rear balance normal force measuring beam II 52 and a rear balance lateral force and rolling moment measuring beam II 53; the rear part of the measuring element of the rear balance 4 consists of a rear balance pitching moment measuring beam I46, a rear balance yawing moment and rolling moment measuring beam I47, a rear balance pitching moment measuring beam II 48 and a rear balance yawing moment and rolling moment measuring beam II 49;
as shown in fig. 1d, the rear end of the rear balance bearing mounting section 44 is sleeved with a rear balance bearing end cover 17, a rear balance seal end cover i 18 and a rear balance seal end cover ii 20 in sequence from front to back; the end cover 17 of the rear balance bearing and the mounting section 44 of the rear balance bearing are tightly fixed through screws IV which are uniformly distributed along the circumferential direction; the rear balance sealing end cover I18 and the rear balance bearing mounting section 44 are tightly fixed through screws V which are uniformly distributed in the circumferential direction and are also sealed through a rear balance sealing ring I23; a sealing ring III 19, a sealing baffle ring II 22 and a sealing ring IV 21 are sequentially arranged between the rear balance sealing end cover I18 and the mandrel 2 from front to back; the front balance sealing end cover II 9 and the front balance sealing end cover I11 are tightly fixed through screws VI which are uniformly distributed in the circumferential direction.
Further, as shown in fig. 8a and 8b, the first acquired flat end cap i 18 is a step end cap, the large end is a first acquired flat end cap i connecting end 62, the small end is a first acquired flat end cap i sealing end 63, and the first acquired flat end cap i sealing end 63 is circumferentially provided with a through hole.
Further, as shown in fig. 9a and 9b, the end cover ii 20 is a stepped end cover, and the small end is a sealing end 64 of the end cover ii.
Further, as shown in fig. 10a and 10b, the rear balance bearing cover 17 is a stepped cover, and a through hole is formed at a large end along the circumferential direction.
Example 1
The procedure for mounting the force measuring device of the balance for the test with high-pressure sealing lateral jet effect of the present example was as follows:
1. pre-installation balance 1
The front balance fixing end 27 is in clearance fit with the supporting beam 3 through a cylinder, the front balance 1 is fixedly connected with the supporting beam 3 through 12M 20 bolts, the rolling positioning between the front balance 1 and the supporting beam 3 is realized through a front balance positioning key I26 and a front balance positioning key II 31, the end face of the transition section 28 of the front balance 1 is provided with a sealing groove for mounting a front balance sealing ring II 24, and the high-pressure static sealing problem between the front balance 1 and the supporting beam 3 is solved by adopting an end face sealing mode.
2. Mounted balance 4
The rear balance fixed end 41 is in clearance fit with the supporting beam 3 through a cylinder, the rear balance 4 is fixedly connected with the supporting beam 3 through 12M 20 bolts, the rolling positioning between the rear balance 4 and the supporting beam 3 is realized through a rear balance positioning key I40 and a rear balance positioning key II 45, the end face of the transition section 42 of the rear balance 4 is provided with a sealing groove for mounting a rear balance sealing ring II 25, and the high-pressure static sealing problem between the rear balance 4 and the supporting beam 3 is solved in an end face sealing mode.
After the front balance 1 and the rear balance 4 are connected with the supporting beam 3, the axes of the front balance 1 and the rear balance 4 are coincided.
3. Mounting of the inner angular contact bearing and the spindle 2
The front balance angle contact bearing pair I7 and the rear balance angle contact bearing pair I5 are respectively installed inside the front balance 1 and the rear balance 4 from the front balance bearing installation section 30 and the rear balance bearing installation section 44, after one end face of the 2 pairs of angle contact bearings is completely attached to the step faces of the front balance bearing installation section 30 and the rear balance bearing installation section 44, the mandrel 2 is inserted into the balance from the rear balance bearing installation section 44, the mandrel front section model connecting end 54 sequentially penetrates through the rear balance angle contact bearing pair I5, the rear balance 4, the front balance 1 and the front balance angle contact bearing pair I7, finally penetrates out from the front balance bearing installation section 30, and in the process of inserting the mandrel 2, when the mandrel shaft shoulder I55 is completely attached to the other end face of the rear balance angle contact bearing pair I5, the axial positioning of the mandrel 2 is completed.
4. Angular contact bearing and balance bearing end cover for mounting outer side
And (3) leading in the postnatal flat angular contact bearing pair II 6 from the rear section model connecting end 57 of the mandrel, mounting the postnatal flat bearing end cover 17 after one end face of the postnatal flat angular contact bearing pair II 6 is completely attached to the mandrel shaft shoulder II 56, and tightly pressing the other end face of the postnatal flat angular contact bearing pair II 6 by the postnatal flat bearing end cover 17.
The shaft sleeve 13 is led in from the mandrel front section model connecting end 54, one end face of the shaft sleeve 13 is completely jointed with the end face of the front balance angle contact bearing pair I7, then the front balance angle contact bearing pair II 8 is led in from the mandrel front section model connecting end 54, the end face of the front balance angle contact bearing pair II 8 is completely jointed with the other end face of the shaft sleeve 13, and finally the front balance bearing end cover 12 is installed to tightly press the front balance angle contact bearing pair II 8.
In the assembling process, the matching relationship between the outer ring of the angular contact bearing and the balance is interference fit, the matching relationship between the inner ring of the angular contact bearing and the mandrel 2 is clearance fit, and the matching relationship between the shaft sleeve 13 and the mandrel 2 is clearance fit.
5. High-pressure rotary seal part of balance 1 before installation
The I11 of balance end cover before installing, the I11 of balance end cover before installing passes through 12M 8 bolted connections with the 30 terminal surfaces of preceding balance bearing installation section, sets up 2 simultaneously on I58 links of balance end cover before
The cylindrical pin hole and the sealing boss are used for installing a positioning pin and a front balance sealing ring I14, so that the axis of the front balance sealing end cover I11 is superposed with the axis of the front balance seal 1, and the high-pressure static sealing function of the joint is realized.
And then, mounting a sealing element in the sealing end 59 of the I front balance sealing end cover, firstly, guiding the sealing ring I15 from the front section model connecting end 54 of the mandrel to the inner hole step surface of the sealing end 59 of the I front balance sealing end cover, then, sequentially guiding the sealing baffle ring I16 and the sealing ring II 10, and finally, mounting the II front balance sealing end cover 9, wherein the sealing end 60 of the II front balance sealing end cover is completely attached to the sealing ring II 10 under the action of bolt pre-tightening force, but the sealing ring I15 and the sealing ring II 10 are not deformed.
After high-pressure gas enters a cavity formed by a front balance 1, a rear balance 4, a mandrel 2, a front balance sealing end cover I11, a sealing ring I15, a sealing baffle ring I16, a sealing ring II 10, a rear balance sealing end cover I18, a sealing ring III 19, a sealing baffle ring II 22 and a sealing ring IV 21 from a supporting beam air inlet end 61 (shown in figure 11) of a supporting beam sleeve, the high-pressure gas passes through 6 sealing rings in the middle of the mandrel 2
The circular hole enters the inside of the mandrel 2 and is finally sprayed out through the rear section model. In the process, the sealing ring I15 and the sealing ring II 10 are tightly extruded on the surface of the mandrel 2 by high-pressure gas in the cavity to realize rotary sealing of the contact surface, and as the surface roughness of the mandrel 2 at the contact surface is 0.2 mu m, the friction coefficients among the sealing ring I15, the sealing ring II 10 and the mandrel 2 are very small, the abrasion of the sealing ring I15 and the sealing ring II 10 is very small, and the friction torque born by the mandrel 2 in the rotating process is also very small. When the sealing ring I15 and the sealing ring II 10 deform due to slight abrasion, the high-pressure gas in the cavity continuously compresses the sealing ring I15 and the sealing ring II 10 to enable the sealing rings to be tightly attached to the surface of the mandrel 2. Therefore, the rotary seal of the contact surface can not generate air leakage due to the micro abrasion of the seal ring I15 and the seal ring II 10.
6. High-pressure rotary sealing part of mounted balance 4
The I18 end face of the I18 end cover of the rear balance is installed, the I18 end face of the I18 end cover of the rear balance is connected with the end face of the 4 bearing installation section 44 of the rear balance through 12M 8 bolts, and 2M 8 bolts are arranged on the I62 end face of the I connecting end of the sealing end cover of the rear balance
The cylindrical pin hole and the sealing boss are used for installing a positioning pin and a postnatal flat sealing ring I23 so as to realize the coincidence of the axis of the postnatal flat sealing end cover I18 and the axis of the postnatal flat sealing end cover I4 and the high-pressure static sealing function of the joint.
And then, mounting a sealing element in the sealing end 63 of the first sealing end cover of the rear balance, firstly, guiding the sealing ring III 19 from the connecting end 57 of the rear section of the mandrel to the step surface of the inner hole of the sealing end 63 of the first sealing end cover of the rear balance, then, sequentially guiding the sealing baffle ring II 22 and the sealing ring IV 21, finally, mounting the second sealing end cover of the rear balance 20, and completely attaching the sealing end 64 of the second sealing end cover of the rear balance to the sealing ring IV 21 under the action of the bolt pre-tightening force, but not deforming the sealing ring III 19 and the sealing ring IV 21.
The sealing ring III 19 and the sealing ring IV 21 are tightly extruded on the surface of the mandrel 2 by high-pressure gas in the cavity to realize rotary sealing of a contact surface, and as the surface roughness of the mandrel 2 at the contact surface is 0.2 mu m, the friction coefficients between the sealing ring III 19 and the sealing ring IV 21 and the mandrel are small, the abrasion of the sealing ring III 19 and the sealing ring IV 21 is small, and the friction torque born by the mandrel in the rotating process is also small. When the sealing ring III 19 and the sealing ring IV 21 deform due to slight abrasion, the high-pressure gas in the cavity continues to compress the sealing ring III 19 and the sealing ring IV 21, so that the sealing ring III 19 and the sealing ring IV 21 are tightly attached to the surface of the mandrel 2. Therefore, the rotary seal of the contact surface does not generate air leakage due to the slight abrasion of the seal ring III 19 and the seal ring IV 21.
Claims (10)
1. A balance force measuring device for a test with a high-pressure sealing transverse jet flow effect is characterized in that a rod balance is adopted as the balance force measuring device, a mandrel (2) is arranged on the central axis of the rod balance, an airflow channel is arranged on the central axis of the mandrel (2), the front end of the airflow channel is communicated with high-pressure air, and the rear end of the airflow channel is communicated with a transverse jet flow nozzle of a rear section model;
the mandrel (2) is sleeved with a front balance (1), a supporting beam (3) and a rear balance (4) in sequence from front to back; a front balance angle contact bearing pair II (8) and a front balance angle contact bearing pair I (7) are sequentially arranged between the front balance (1) and the mandrel (2) from front to back; a rear balance angle contact bearing pair II (6) and a rear balance angle contact bearing pair I (5) are sequentially arranged between the rear balance (4) and the mandrel (2) from back to front;
the front balance (1) and the rear balance (4) are five-component force measuring balances, the front balance (1) measures the normal force, the pitching moment, the lateral force, the yawing moment and the rolling moment of the front section model, and the rear balance (4) measures the normal force, the pitching moment, the lateral force, the yawing moment and the rolling moment of the rear section model;
the aircraft model is divided into a front section model and a rear section model, the front section model is sleeved on a front skyhook (1) of the mandrel (2) through a front section model connecting end (54) at the front end of the mandrel (2), and the rear section model is sleeved on a rear skyhook (4) of the mandrel (2) through a rear section model connecting end (57) at the rear end of the mandrel (2).
2. The balance force measuring device for the test with the high-pressure sealing transverse jet flow effect is characterized in that the front balance (1) is of a hollow rod type structure and sequentially comprises a front balance fixing end (27), a front balance transition section (28), a front balance middle section (29) and a front balance bearing mounting section (30) from back to front;
the front balance fixing end (27) is in cylindrical clearance fit with the supporting beam (3), and the front balance fixing end (27) is in rolling positioning with the supporting beam (3) through a front balance positioning key I (26) and a front balance positioning key II (31);
the circumference surface of the front balance transition section (28) is provided with uniformly distributed grooves, each groove is internally provided with a through hole, a bolt assembled with the supporting beam (3) is inserted into each through hole, and the front balance (1) is fixedly connected with the supporting beam (3) by screwing the bolt; the end face of the front balance transition section (28) is also provided with a sealing groove, a front balance sealing ring II (24) is installed in the sealing groove, and the front balance transition section (28) is sealed with the supporting beam (3) through the front balance sealing ring II (24);
two ends of the middle section (29) of the front balance are respectively connected with a front part measuring element of the front balance (1) and a rear part measuring element of the front balance (1); the front part of a measuring element of the front balance (1) consists of a front balance normal force measuring beam I (36), a front balance lateral force and rolling moment measuring beam I (37), a front balance normal force measuring beam II (38) and a front balance lateral force and rolling moment measuring beam II (39); the rear part of the measuring element of the front balance (1) consists of a front balance pitching moment measuring beam I (32), a front balance yawing moment and rolling moment measuring beam I (33), a front balance pitching moment measuring beam II (34) and a front balance yawing moment and rolling moment measuring beam II (35);
a shaft sleeve (13) is also arranged between the front balance angle contact bearing pair II (8) and the front balance angle contact bearing pair I (7) between the front balance bearing mounting section (30) and the mandrel (2); the front end of the front balance bearing mounting section (30) is sleeved with a front balance bearing end cover (12), a front balance sealing end cover I (11) and a front balance sealing end cover II (9) from back to front in sequence; the front balance bearing end cover (12) and the front balance bearing mounting section (30) are tightly fixed through screws I which are uniformly distributed along the circumferential direction; the front balance sealing end cover I (11) and the front balance bearing mounting section (30) are tightly fixed through screws II which are uniformly distributed in the circumferential direction, and are sealed through a front balance sealing ring I (14); a sealing ring I (15), a sealing baffle ring I (16) and a sealing ring II (10) are sequentially arranged between the front balance sealing end cover I (11) and the mandrel (2) from back to front; the front balance sealing end cover II (9) and the front balance sealing end cover I (11) are tightly fixed through screws III which are uniformly distributed in the circumferential direction.
3. The balance force measuring device with the high-pressure seal transverse jet flow effect test as claimed in claim 2, wherein the front balance seal end cover I (11) is a step end cover, the large end is a front balance seal end cover I connecting end (58), and the small end is a front balance seal end cover I sealing end (59).
4. The balance force measuring device with the high-pressure seal transverse jet flow effect test as claimed in claim 2, wherein the front balance seal end cover II (9) is a step end cover, and the small end is a front balance seal end cover II seal end (60).
5. The balance force measuring device with the high-pressure seal transverse jet effect test function according to claim 2, wherein the front balance bearing end cover (12) is a step end cover, and a large end is provided with a through hole along the circumferential direction.
6. The balance force measuring device for the test with the high-pressure sealing transverse jet flow effect as claimed in claim 1, wherein the mandrel (2) is of a hollow rod type structure, a front section model connecting end (54) at the front end of the mandrel (2) is a conical section I, a threaded hole I is formed in the front section model connecting end (54), and the front section model is fixed in a manner that a flat key positioning screw I is connected in a conical matching manner and screwed; a rear section model connecting end (57) at the rear end of the mandrel (2) is a conical section II, a threaded hole II is formed in the rear section model connecting end (57), and a rear section model is fixed in a mode that a flat key positioning screw II is connected in a conical matching manner and screwed down; the middle section of the mandrel (2) is integrally an equal straight section, a raised equal straight step section is arranged in the middle of the equal straight section, the front end face of the step section is a mandrel shoulder I (55), and the rear end face of the step section is a mandrel shoulder II (56); two groups of symmetrical high-pressure air inlets are also formed on the equal straight section of the mandrel (2).
7. The balance force measuring device for the test with the high-pressure seal transverse jet flow effect is characterized in that the rear balance (4) is of a hollow rod type structure and sequentially comprises a rear balance fixing end (41), a rear balance transition section (42), a rear balance middle section (43) and a rear balance bearing mounting section (44) from front to back;
the rear zenith fixing end (41) is in cylindrical clearance fit with the supporting cross beam (3), and the rear zenith fixing end (41) is in rolling positioning with the supporting cross beam (3) through a rear zenith positioning key I (40) and a rear zenith positioning key II (45);
the circumference surface of the transition section (42) of the rear balance is provided with uniformly distributed grooves, each groove is internally provided with a through hole, a bolt assembled with the supporting beam (3) is inserted into each through hole, and the rear balance (4) is fixedly connected with the supporting beam (3) by screwing the bolt; the end face of the rear balance transition section (42) is also provided with a sealing groove, a rear balance sealing ring II (25) is installed in the sealing groove, and the front balance transition section (28) and the supporting beam (3) are sealed through the rear balance sealing ring II (25);
the two ends of the rear balance middle section (43) are respectively connected with a front part measuring element of the rear balance (4) and a rear part measuring element of the rear balance (4); the front part of the measuring element of the rear balance (4) consists of a rear-sky-plane normal force measuring beam I (50), a rear-plane lateral force and rolling moment measuring beam I (51), a rear-sky-plane normal force measuring beam II (52) and a rear-plane lateral force and rolling moment measuring beam II (53); the rear part of the measuring element of the rear balance (4) consists of a rear balance pitching moment measuring beam I (46), a rear balance yawing moment and rolling moment measuring beam I (47), a rear balance pitching moment measuring beam II (48) and a rear balance yawing moment and rolling moment measuring beam II (49);
the rear end of the rear balance bearing mounting section (44) is sleeved with a rear balance bearing end cover (17), a rear balance sealing end cover I (18) and a rear balance sealing end cover II (20) in sequence from front to back; the end cover (17) of the rear balance bearing and the mounting section (44) of the rear balance bearing are tightly fixed through screws IV which are uniformly distributed along the circumferential direction; the rear balance sealing end cover I (18) and the rear balance bearing mounting section (44) are tightly fixed through screws V which are uniformly distributed in the circumferential direction and are sealed through a rear balance sealing ring I (23); a sealing ring III (19), a sealing baffle ring II (22) and a sealing ring IV (21) are sequentially arranged between the rear balance sealing end cover I (18) and the mandrel (2) from front to back; and the front balance sealing end cover II (9) and the front balance sealing end cover I (11) are tightly fixed through screws VI which are uniformly distributed in the circumferential direction.
8. The balance force measuring device with the high-pressure seal transverse jet flow effect test function according to claim 7, wherein the acquired flat seal end cover I (18) is a step end cover, the large end of the acquired flat seal end cover I is a connecting end (62) of the acquired flat seal end cover I, the small end of the acquired flat seal end cover I is a seal end (63) of the acquired flat seal end cover I, and through holes are formed in the seal end (63) of the acquired flat seal end cover I along the circumferential direction.
9. The balance force measuring device for the test with the high-pressure seal transverse jet effect according to claim 7, wherein the acquired flat seal end cover II (20) is a step end cover, and the small end of the acquired flat seal end cover II is a seal end (64) of the acquired flat seal end cover II.
10. The balance force measuring device with the high-pressure seal transverse jet flow effect test function according to claim 7, wherein the rear balance bearing end cover (17) is a step end cover, and a large end is provided with a through hole along the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022019922.0U CN212693196U (en) | 2020-09-16 | 2020-09-16 | Balance force measuring device for test with high-pressure sealing transverse jet flow effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022019922.0U CN212693196U (en) | 2020-09-16 | 2020-09-16 | Balance force measuring device for test with high-pressure sealing transverse jet flow effect |
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| CN212693196U true CN212693196U (en) | 2021-03-12 |
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| CN202022019922.0U Expired - Fee Related CN212693196U (en) | 2020-09-16 | 2020-09-16 | Balance force measuring device for test with high-pressure sealing transverse jet flow effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183154A (en) * | 2023-04-24 | 2023-05-30 | 中国空气动力研究与发展中心高速空气动力研究所 | Ultra-large attack angle wind tunnel test method for slender body model |
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2020
- 2020-09-16 CN CN202022019922.0U patent/CN212693196U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183154A (en) * | 2023-04-24 | 2023-05-30 | 中国空气动力研究与发展中心高速空气动力研究所 | Ultra-large attack angle wind tunnel test method for slender body model |
| CN116183154B (en) * | 2023-04-24 | 2023-06-27 | 中国空气动力研究与发展中心高速空气动力研究所 | Ultra-large attack angle wind tunnel test method for slender body model |
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