CN112834162A - Pantograph bow lifting force measuring test device - Google Patents
Pantograph bow lifting force measuring test device Download PDFInfo
- Publication number
- CN112834162A CN112834162A CN202110433462.2A CN202110433462A CN112834162A CN 112834162 A CN112834162 A CN 112834162A CN 202110433462 A CN202110433462 A CN 202110433462A CN 112834162 A CN112834162 A CN 112834162A
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- pantograph
- lifting force
- test device
- head
- force measuring
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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
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention belongs to the technical field of pantograph stress tests, and particularly relates to a test device for measuring the lifting force of a pantograph head of a pantograph. The technical scheme is as follows: a test device for measuring the lifting force of a pantograph head comprises a connecting mechanism for connecting the pantograph head of a pantograph, wherein the other end of the connecting mechanism is sequentially connected with a tensioner, a steel wire rope, a spring assembly and a force measuring sensor, and the other end of the force measuring sensor is connected to a floor of a test area; the elastic coefficient of the spring assembly is 90% -110% of the equivalent elastic coefficient of the pantograph head. The invention provides a test device for improving the measurement accuracy of the lifting force of a pantograph head under real wind load vibration.
Description
Technical Field
The invention belongs to the technical field of pantograph stress tests, and particularly relates to a test device for measuring the lifting force of a pantograph head of a pantograph.
Background
In wind tunnel tests for measuring the pantograph head lifting force (also called lifting force), the pantograph head and the force sensor are usually connected by a steel wire rope in a soft (elastic) manner or by a strut and a spherical hinge in a hard (rigid) manner. However, in the connection mode, the common actions of self gravity, aerodynamic force generated by wind load, contact network pressure and the like are ignored when the pantograph head of the pantograph moves in the train moving process, so that the pantograph can vibrate in the direction perpendicular to the line direction, and the measured lifting force value cannot accurately reflect the real-time change of the real value and the vibration characteristic of the pantograph head.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a test device for improving the measurement accuracy of the pantograph head lifting force under real wind load vibration.
The technical scheme adopted by the invention is as follows:
a test device for measuring the lifting force of a pantograph head comprises a connecting mechanism for connecting the pantograph head of a pantograph, wherein the other end of the connecting mechanism is sequentially connected with a tensioner, a steel wire rope, a spring assembly and a force measuring sensor, and the other end of the force measuring sensor is connected to a floor of a test area; the elastic coefficient of the spring assembly is 90% -110% of the equivalent elastic coefficient of the pantograph head.
When the wind tunnel test is performed on the pantograph, the lifting force of the pantograph head of the pantograph needs to be tested. During testing, the pantograph head transmits the lifting force to the testing device, and a force measuring sensor in the testing device can measure the lifting force. When the pantograph is tested, the pantograph can vibrate in a direction perpendicular to a line direction under the combined action of self gravity, aerodynamic force generated by wind load, contact network pressure and the like. And the elastic coefficient of the spring assembly in the test device is 90-110% of the equivalent elastic coefficient of the pantograph head, so that the device and the pantograph vibrate synchronously to truly reflect the vibration characteristic of the pantograph head and improve the measurement accuracy of the lifting force of the pantograph head.
According to the preferable scheme of the invention, the connecting mechanism comprises a head hanging ring, one end of the tensioner is sleeved in the head hanging ring, a clamping seat is connected to the head hanging ring, a clamping cover is connected to the clamping seat, and grooves for clamping the pantograph are arranged between the clamping seat and the clamping cover. One end of the tensioner is sleeved in the head hanging ring, and the tensioner can tilt for a certain angle relative to the head hanging ring, so that transverse vibration is offset, and the influence of the transverse vibration on the force measuring sensor is avoided. The clamping seat and the clamping cover can clamp the gravity center position of the pantograph, so that reliable connection is guaranteed, and the accuracy of measuring the lifting force of the pantograph is improved.
As a preferable scheme of the invention, a head hanging ring screw rod is fixed on the head hanging ring and is in threaded connection with the clamping seat. The head lifting ring screw rod is in threaded connection with the clamping seat, so that the assembly and disassembly are convenient.
According to the preferable scheme of the invention, the two ends of the tensioner are both connected with the hooks, the hook at one end of the tensioner is hung on the connecting mechanism, and the hook at the other end of the tensioner is hung at one end of the steel wire rope. Two ends of the tensioner are respectively connected with the connecting mechanism and the steel wire rope in a hanging mode through the hook, so that the tensioner is guaranteed to have certain capability of resisting transverse vibration.
The tensioner can tension the connecting mechanism, the tensioner, the steel wire rope, the spring assembly, the force measuring sensor and the connecting position between the test area floors through adjustment, and the lifting force borne by the pantograph can be effectively transmitted to the force measuring sensor during the test.
According to the preferable scheme of the invention, the two ends of the steel wire rope are both provided with connecting rope holes, the connecting rope hole at one end of the steel wire rope is sleeved at one end of the tensioner, and the connecting rope hole at the other end of the steel wire rope is sleeved at one end of the spring assembly. The two ends of the steel wire rope are respectively sleeved with the tensioner and the spring assembly through the connecting rope holes, so that the steel wire rope is ensured to have the capability of resisting transverse vibration, and the accuracy of the device for measuring the lifting force of the pantograph is ensured.
As a preferred scheme of the invention, the spring assembly comprises a spring main body, one end of the spring main body is sleeved at one end of the steel wire rope, the other end of the spring main body is sleeved with a tail hanging ring, and the tail hanging ring is connected with the force measuring sensor. The sleeve is established together between afterbody rings and the spring main part to the spring main part can vert certain angle for afterbody rings, reduces the influence of transverse vibration to the longitudinal force of spring main part transmission.
In a preferred embodiment of the present invention, the spring body is a compression spring or an extension spring. The spring main body is a tension or compression spring, and the elastic coefficient of the spring main body is similar to the equivalent elastic coefficient of the pantograph head of the pantograph, so that the measurement error of the lifting force caused by the vibration of the pantograph is reduced.
As a preferred scheme of the invention, a tail hanging ring screw rod is fixed on the tail hanging ring and is in threaded connection with the force measuring sensor. The tail flying ring screw rod is in threaded connection with the force measuring sensor, so that the assembly and disassembly are convenient.
In a preferred embodiment of the invention, the end of the load cell remote from the spring assembly is bolted to the floor of the test area. The threaded holes are formed in the floor of the test area, and the force measuring sensor is connected with the threaded holes in the floor of the test area through bolts, so that the connection reliability is guaranteed.
As the preferred scheme of the invention, when the pantograph is in a windward state, the force transducer is arranged on the lower floor of a wind tunnel test area; when the pantograph is in a leeward state, the force measuring sensor is arranged on the floor of the wind tunnel test area.
When the pantograph is in a windward state, the lifting force borne by the pantograph head is generally upward, and in order to ensure that the test device disclosed by the invention is in a tensile state to realize the measurement of the lifting force, the force sensor is arranged on the lower floor of a wind tunnel test area and is not in contact with the pantograph. When the pantograph is in a leeward state, the lifting force borne by the pantograph head is usually downward, and in order to ensure that the test device disclosed by the invention is in a tensile state to realize the measurement of the lifting force, the force sensor is arranged on the floor of a wind tunnel test area and is not in contact with the pantograph.
The invention has the beneficial effects that:
during testing, the pantograph head transmits the lifting force to the testing device, and a force measuring sensor in the testing device can measure the lifting force. When the pantograph is tested, the pantograph can vibrate in a direction perpendicular to a line direction under the combined action of self gravity, aerodynamic force generated by wind load, contact network pressure and the like. And the elastic coefficient of the spring assembly in the test device is 90-110% of the equivalent elastic coefficient of the pantograph head, so that the device and the pantograph vibrate synchronously to truly reflect the vibration characteristic of the pantograph head and improve the measurement accuracy of the lifting force of the pantograph head.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is an assembly view of the present invention with a pantograph in a windward state;
fig. 4 is an assembly view of the present invention and pantograph in a leeward state.
In the drawings, 1-the connection mechanism; 2-a tensioner; 3-a steel wire rope; 4-a spring assembly; 5-a force sensor; 6-pantograph; 7-upper floor; 8-lower floor; 11-a head suspension ring; 12-a clamping seat; 13-clamping the cover; 21-hanging hooks; 31-connecting rope holes; 41-a spring body; 42-tail slinger; 61-pantograph head.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. 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.
As shown in fig. 1 to 4, the pantograph head lifting force measurement test device of the present embodiment includes a connection mechanism 1 for connecting a pantograph head 61, a tensioner 2, a wire rope 3, a spring assembly 4, and a force sensor 5 connected to the other end of the connection mechanism 1 in sequence, and the other end of the force sensor 5 is connected to a floor of a test area; the elastic coefficient of the spring assembly 4 is between 90% and 110% of the equivalent elastic coefficient of the pantograph head 61.
The pantograph 6 is an electrical device for an electric traction locomotive to obtain electric energy from a catenary, is mounted on a roof of the locomotive or a bullet train, and generally comprises a bow (a slide plate, an upper frame, and the like), a lower arm, an underframe, a pantograph lifting spring, a transmission cylinder, a support insulator, and the like.
The equivalent elastic coefficient of the pantograph bow 61 is that the pantograph bow of the pantograph 6 generates vibration perpendicular to the line direction due to the combined action of self gravity, aerodynamic force generated by wind load, contact network pressure and the like in the process of train advancing, and the unit of the ratio of the resultant force to the maximum vibration displacement is N/mm.
In the wind tunnel test of the pantograph 6, the lifting force of the pantograph head 61 needs to be tested. During testing, the pantograph head 61 transmits its lifting force to the testing device of the present invention, and the load cell 5 in the testing device can measure the lifting force. When the pantograph 6 is tested, the pantograph 6 can vibrate in a direction perpendicular to a line direction under the combined action of self gravity, aerodynamic force generated by wind load, contact network pressure and the like. And the elastic coefficient of the spring assembly 4 in the test device is between 90% and 110% of the equivalent elastic coefficient of the pantograph head 61, so that the device and the pantograph 6 vibrate synchronously to truly reflect the vibration characteristic of the pantograph head 61 and improve the measurement accuracy of the lifting force of the pantograph head 61. The suspension joint device has the advantages of simple structure, small volume, light weight, convenient maintenance and high reliability in the test.
Specifically, coupling mechanism 1 includes head rings 11, and the one end cover of tensioning ware 2 is located in head rings 11, is connected with on the head rings 11 and presss from both sides tight seat 12, presss from both sides tight lid 13 on the tight seat 12 of clamp, presss from both sides and all is provided with the recess that is used for pressing from both sides tight pantograph 6 between tight seat 12 and the tight lid 13 of clamp. In the head rings 11 were located to the pot head of tensioning ware 2, then tensioning ware 2 can vert certain angle for head rings 11 to lateral vibration gets offset, avoids lateral vibration to cause the influence to load cell 5. The clamping base 12 and the clamping cover 13 have grooves for clamping the gravity center of the pantograph 6, so that reliable connection is ensured, and the accuracy of measuring the lifting force of the pantograph 6 is improved. The clamping shoe 12 and the clamping cover 13 are clamped to the position of the center of gravity of the pantograph 6, typically to the balance bar of the pantograph head. The head hanging ring 11 is fixedly provided with a head hanging ring screw rod, and the head hanging ring screw rod is in threaded connection with the clamping seat 12. The head lifting ring screw rod is in threaded connection with the clamping seat 12, so that the assembly and disassembly are convenient.
Furthermore, both ends of the tensioner 2 are connected with hooks 21, the hook 21 at one end of the tensioner 2 is hung on the connecting mechanism 1, and the hook 21 at the other end of the tensioner 2 is hung on one end of the steel wire rope 3. Two ends of the tensioner 2 are respectively connected with the connecting mechanism 1 and the steel wire rope 3 in a hanging mode through the hanging hook 21, and therefore the tensioner 2 is guaranteed to have certain capability of resisting transverse vibration.
The tensioner 2 can tension the connecting mechanism 1, the tensioner 2, the steel wire rope 3, the spring assembly 4, the force measuring sensor 5 and the floor of the test area through adjustment, and the lifting force borne by the pantograph 6 can be effectively transmitted to the force measuring sensor 5 during the test.
Furthermore, both ends of the steel wire rope 3 are provided with a connecting rope hole 31, the connecting rope hole 31 at one end of the steel wire rope 3 is sleeved at one end of the tensioner 2, and the connecting rope hole 31 at the other end of the steel wire rope 3 is sleeved at one end of the spring assembly 4. Two ends of the steel wire rope 3 are respectively sleeved with the tensioner 2 and the spring assembly 4 through the connecting rope holes 31, so that the steel wire rope 3 is ensured to have the capability of resisting transverse vibration, and the accuracy of the device for measuring the lifting force of the pantograph 6 is ensured.
Furthermore, the spring assembly 4 includes a spring body 41, one end of the spring body 41 is sleeved on one end of the steel wire rope 3, the other end of the spring body 41 is sleeved with a tail hanging ring 42, and the tail hanging ring 42 is connected with the load cell 5. The tail hanging ring 42 and the spring main body 41 are sleeved together, so that the spring main body 41 can tilt for a certain angle relative to the tail hanging ring 42, and the influence of transverse vibration on the transmission of longitudinal force of the spring main body 41 is reduced.
The spring body 41 is a compression spring or an extension spring. The spring body 41 is a tension or compression spring, and the elastic coefficient thereof is similar to the equivalent elastic coefficient of the pantograph head 61, so that the measurement error of the lifting force caused by the vibration of the pantograph 6 is reduced.
And a tail lifting ring screw rod is fixed on the tail lifting ring 42 and is in threaded connection with the force measuring sensor 5. The tail flying ring screw rod is in threaded connection with the force measuring sensor 5, so that the assembly and disassembly are convenient.
Further, the end of the load cell 5 remote from the spring assembly 4 is bolted to the floor of the test area. The threaded holes are formed in the floor of the test area, and the force measuring sensor 5 is connected with the threaded holes in the floor of the test area through bolts, so that the connection reliability is guaranteed.
Furthermore, as shown in fig. 3, when the pantograph 6 is in a windward state, the lifting force applied to the head is generally upward, and in order to ensure that the testing device of the present invention is in a tensile state to realize the measurement of the lifting force, the load cell 5 is installed on the lower floor 8 of the wind tunnel test area, and the load cell 5 is not in contact with the pantograph 6. As shown in fig. 4, when the pantograph 6 is in a leeward state, the lifting force applied to the head of the pantograph is usually downward, and in order to ensure that the testing device of the present invention is in a tensile state to realize the measurement of the lifting force, the load cell 5 is installed on the floor 7 of the wind tunnel test area, and the load cell 5 is not in contact with the pantograph 6.
The suspension joint device has strong practicability, and in the components of the suspension joint device, the head hanging ring 11, the tail hanging ring 42, the steel wire rope 3, the tensioner 2 and the like are standard parts, so that the suspension joint device is simple to process and is applicable to different types of pantographs 6 in real objects.
The above-described implementations are directed to pantograph 6 lift measurement tests carried out in wind tunnels. Of course, the present invention is also applicable to tests such as a wind-load vibration characteristic test of the pantograph 6.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (10)
1. A test device for measuring the lifting force of a pantograph head is characterized by comprising a connecting mechanism (1) for connecting a pantograph head (61), wherein the other end of the connecting mechanism (1) is sequentially connected with a tensioner (2), a steel wire rope (3), a spring assembly (4) and a force measuring sensor (5), and the other end of the force measuring sensor (5) is connected to a floor of a test area; the elastic coefficient of the spring assembly (4) is 90% -110% of the equivalent elastic coefficient of the pantograph head (61).
2. The pantograph head lifting force measuring test device according to claim 1, wherein the connecting mechanism (1) comprises a head lifting ring (11), one end of the tensioner (2) is sleeved in the head lifting ring (11), a clamping seat (12) is connected to the head lifting ring (11), a clamping cover (13) is connected to the clamping seat (12), and a groove for clamping the pantograph (6) is arranged between the clamping seat (12) and the clamping cover (13).
3. The pantograph head lifting force measuring test device according to claim 2, wherein a head lifting ring screw is fixed to the head lifting ring (11), and the head lifting ring screw is in threaded connection with the clamping seat (12).
4. The pantograph head lifting force measuring test device according to claim 1, wherein the two ends of the tensioner (2) are connected with hooks (21), the hook (21) at one end of the tensioner (2) is hung on the connecting mechanism (1), and the hook (21) at the other end of the tensioner (2) is hung on one end of the steel wire rope (3).
5. The pantograph head lifting force measuring test device according to claim 1, wherein the two ends of the steel wire rope (3) are provided with connecting rope holes (31), the connecting rope hole (31) at one end of the steel wire rope (3) is sleeved at one end of the tensioner (2), and the connecting rope hole (31) at the other end of the steel wire rope (3) is sleeved at one end of the spring assembly (4).
6. The pantograph head lifting force measuring test device according to claim 1, wherein the spring assembly (4) comprises a spring main body (41), one end of the spring main body (41) is sleeved on one end of the steel wire rope (3), the other end of the spring main body (41) is sleeved with a tail hanging ring (42), and the tail hanging ring (42) is connected with the load cell (5).
7. A pantograph head lifting force measurement test device according to claim 6, characterised in that the spring body (41) is a compression spring or an extension spring.
8. The pantograph head lifting force measurement test device according to claim 6, wherein a tail lifting ring screw is fixed on the tail lifting ring (42), and the tail lifting ring screw is in threaded connection with the load cell (5).
9. Testing device for pantograph head lifting force measurement according to claim 1, characterized in that the end of the load cell (5) remote from the spring assembly (4) is bolted to the floor of the test area.
10. The pantograph head lifting force measuring test device according to any one of claims 1 to 9, wherein the load cell (5) is installed at the lower floor (8) of the wind tunnel test area when the pantograph (6) is in a windward state; when the pantograph (6) is in a leeward state, the force measuring sensor (5) is arranged on a floor (7) on a wind tunnel test area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110433462.2A CN112834162A (en) | 2021-04-22 | 2021-04-22 | Pantograph bow lifting force measuring test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110433462.2A CN112834162A (en) | 2021-04-22 | 2021-04-22 | Pantograph bow lifting force measuring test device |
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| CN112834162A true CN112834162A (en) | 2021-05-25 |
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| CN202110433462.2A Pending CN112834162A (en) | 2021-04-22 | 2021-04-22 | Pantograph bow lifting force measuring test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112658A (en) * | 2021-10-29 | 2022-03-01 | 沪东中华造船(集团)有限公司 | Ship deck embedded mooring hole strength test device and test method |
| CN115683529A (en) * | 2023-01-03 | 2023-02-03 | 中国空气动力研究与发展中心低速空气动力研究所 | Pantograph contact force test device |
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