CN111829713B - Motor vertical force system testing structure of hanging seat type force measurement framework and manufacturing method thereof - Google Patents
Motor vertical force system testing structure of hanging seat type force measurement framework and manufacturing method thereof Download PDFInfo
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- CN111829713B CN111829713B CN202010664109.0A CN202010664109A CN111829713B CN 111829713 B CN111829713 B CN 111829713B CN 202010664109 A CN202010664109 A CN 202010664109A CN 111829713 B CN111829713 B CN 111829713B
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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
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
- G01L5/161—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance
- G01L5/1627—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force using variations in ohmic resistance of strain gauges
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Abstract
The invention provides a motor vertical force system test structure of a hanging seat type force measurement framework and a manufacturing method thereof.
Description
Technical Field
The invention relates to a structure for testing a motor vertical force system of a hanging seat type force measurement framework of a railway vehicle.
Background
For the motor suspension type bogie widely used in the railway vehicle, no test structure and method for the vertical force system of the bogie in the prior art exist.
Disclosure of Invention
The purpose of the invention is: the motor vertical force system testing structure of the hanging seat type force measuring frame and the manufacturing method thereof are provided, at least one group of full-bridge circuit structures are arranged on each motor hanging seat of the force measuring frame, and a strain gauge on each motor hanging seat forms a full-bridge circuit, so that the testing precision is improved.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a vertical power of motor of hanging seat formula dynamometry framework is test structure, this hanging seat formula dynamometry framework has two curb girders and two crossbeams to be connected with the motor on the crossbeam and hang the seat, its characterized in that, it has high separation degree load identification point region to define on the motor hangs the seat, is respectively:
the first area is positioned between the axial center line and the bolt center line and positioned on one side of the bolt symmetrical center line close to the near-end side beam;
a second region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, the lower part of the motor hanging seat is connected with the cross beam through the web plate, the web plate is provided with two oval lightening holes, the symmetrical center positions of the two lightening holes are provided with a lightening symmetrical center line which is vertical to the axial center line of the cross beam, and the second area is positioned between the long-axis extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the near-end side beam;
a third region: the upper surface of the cross beam is connected with the motor hanging seat, is positioned between the axial center line and the center line of the bolt and is positioned on one side of the symmetrical center line of the bolt close to the far-end side beam;
a fourth region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, positioned between long shaft extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the far-end side beam;
at least one strain gauge is pasted on each high-resolution load identification point area; weighing: the strain gauge on the first area is a first strain gauge, the strain gauge on the second area is a second strain gauge, the strain gauge on the third area is a third strain gauge, and the strain gauge on the fourth area is a fourth strain gauge; a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge on the same motor hanging seat form a full-bridge circuit structure;
in the full-bridge circuit structure, the first strain gauge and the second strain gauge form an adjacent arm, the third strain gauge and the fourth strain gauge form an adjacent arm, the first strain gauge and the third strain gauge form an arm pair, and the second strain gauge and the fourth strain gauge form an arm pair.
The vertical force of motor of hanging seat formula dynamometry framework be test structure, wherein: at least one group of standby full-bridge circuit structures are arranged on the motor hanging seat.
The vertical force of motor of hanging seat formula dynamometry framework be test structure, wherein: the distances between the first area, the third area and the symmetrical center line of the bolt do not exceed the distribution area of the upper bolt holes.
The vertical force of motor of hanging seat formula dynamometry framework be test structure, wherein: the second area and the fourth area are also positioned between the cross beam and the upper edges of the two lightening holes.
A method for manufacturing a motor vertical force system test structure of a hanging seat type force measurement framework is characterized in that the test method comprises the following steps:
(1) the motor hanging seat is defined with a high-resolution load identification point area which is respectively as follows:
the first area is positioned between the axial center line and the bolt center line and positioned on one side of the bolt symmetrical center line close to the near-end side beam;
a second region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, the lower part of the motor hanging seat is connected with the cross beam through the web plate, the web plate is provided with two oval lightening holes, the symmetrical center positions of the two lightening holes are provided with a lightening symmetrical center line which is vertical to the axial center line of the cross beam, and the second area is positioned between the long-axis extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the near-end side beam;
a third region: the upper surface of the cross beam is connected with the motor hanging seat, is positioned between the axial center line and the center line of the bolt and is positioned on one side of the symmetrical center line of the bolt close to the far-end side beam;
a fourth region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, positioned between long shaft extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the far-end side beam;
(2) adhering at least one strain gauge on each high-resolution load identification point area; weighing: the strain gauge on the first area is a first strain gauge, the strain gauge on the second area is a second strain gauge, the strain gauge on the third area is a third strain gauge, and the strain gauge on the fourth area is a fourth strain gauge; a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge on the same motor hanging seat form a full-bridge circuit structure;
in the full-bridge circuit structure, a first strain gauge and a second strain gauge form an adjacent arm, a third strain gauge and a fourth strain gauge form an adjacent arm, the first strain gauge and the fourth strain gauge form a paired arm, and the second strain gauge and the third strain gauge form a paired arm;
(3) the method comprises the following steps that static calibration is carried out on a framework structure attached with strain gauges on a multichannel loading force measurement framework calibration test bed, decoupling calculation is carried out on each full-bridge circuit structure one by one, and one or more groups of bridge structures with the highest mutual decoupling precision or one or more groups of bridge structures meeting the decoupling precision requirement are found;
(4) and finishing the manufacture of the force measuring framework according to the finally determined bridge combination structure.
The manufacturing method of the motor vertical force system testing structure of the hanging seat type force measuring frame comprises the following steps: and (4) arranging at least one group of standby full-bridge circuit structures on the motor hanging seat.
The manufacturing method of the motor vertical force system testing structure of the hanging seat type force measuring frame comprises the following steps: the distances between the first area, the third area and the symmetrical center line of the bolt do not exceed the distribution area of the upper bolt holes.
The manufacturing method of the motor vertical force system testing structure of the hanging seat type force measuring frame comprises the following steps: the second area and the fourth area are also positioned between the cross beam and the upper edges of the two lightening holes.
The bogie force measurement framework is designed according to the motion characteristics of the framework and the vertical force system test requirements of the framework motor; according to the stress characteristic of the suspension seat type bogie, an independent full bridge circuit is designed on a suspension seat of the framework, so that the overall vertical force system of the framework has a larger response level on the basis of careful calculation, and meanwhile, the interference response generated by other force systems is far lower than the vertical force test response, so that the decoupling precision of each force system is ensured. The bogie force measuring framework ensures the test precision and enables the measured load and the structural strain to present a better quasi-static relation.
Drawings
FIG. 1 is a schematic diagram of a strain gage attachment location for a motor vertical force system test structure of a hanger bracket type force measurement frame;
FIG. 2 is a bridge structure diagram of a dynamometric frame braking force test structure;
FIGS. 3, 4 and 5 are schematic views of the strain gauge attachment area of the dynamometric frame braking force test structure.
Description of reference numerals: 1-a first strain gauge; 2-a second strain gage; 3-a third strain gauge; 4-a fourth strain gage; 5. 6, 7, 8-spare strain gauges; 71-a motor hanging seat; 72-a cross beam; 73-side beam; 74-Upper bolt hole; 75-a web; 76-lightening holes; s1, S2, S3, S4-range; a-axial centerline of the beam; b-bolt centerline; c-the symmetrical center line of the bolt.
Detailed Description
Firstly, the manufacturing process of the hanging seat type force measuring frame is roughly introduced as follows:
(1) a finite element model of the suspension type force measurement framework is established by adopting a finite element method, a simulation load is applied to the suspension type force measurement framework, a strain bridge combination mode is designed on the framework aiming at a motor vertical force system, and a high-separation-degree load identification point area of the suspension type force measurement framework is determined.
The invention can confirm that: a typical suspension dynamometric frame, as shown in fig. 1, 3-5, has two cross beams 72 and two side beams 73, one motor suspension 71 is connected to the outside of each cross beam 72, and four high-resolution load identification point areas are defined on the motor suspension 71 and the cross beam 72 connected thereto, respectively:
a first region located at a position where the upper surface of the cross beam 72 is connected to the motor mount 71, specifically, a plurality of upper bolt holes 74 are provided on the upper surface of the motor mount 71, the cross beam 72 corresponding to the motor mount 71 has an axial center line a, and a straight line passing through the center line of the upper bolt holes 74 and parallel to the axial center line a of the cross beam 72 is a bolt center line b, the center position (center position of the head bolt hole) of the plurality of upper bolt holes 74 further has a bolt symmetry center line c perpendicular to the bolt center line b, the first region is located between the axial center line a and the bolt center line b (as shown in a range S1), and is located on a side of the bolt symmetry center line c close to the proximal side beam 73;
a second region: the web 75 under the motor hanger 71 is connected to the cross beam 72, specifically, the web 75 under the motor hanger 71 is connected to the cross beam 72 through the web 75, the web 75 has two oval weight-reducing holes 76, the symmetric center position of the two weight-reducing holes 76 has a weight-reducing symmetric center line d perpendicular to the axial center line of the cross beam 72, the second region is located between the long axis extension lines of the two weight-reducing holes 76 (as shown in a range S2), and is located on the side of the weight-reducing symmetric center line d close to the proximal side beam 73;
a third region: at a position where the upper surface of the cross member 72 is connected to the motor mount 71, specifically, the third region is located between the axial center line a and the bolt center line b (as indicated by a range S1), and is located on a side of the bolt symmetry center line c close to the distal side member 73;
a fourth region: the web 75 under the motor hanger 71 is connected to the cross beam 72, and specifically, the fourth region is located between the long axis extension lines of the two weight-reducing holes 76 (as shown in a range S2), and is located on the side of the weight-reducing symmetrical center line d close to the distal side beam 73.
Further, the distance between the first and third regions and the bolt symmetry center line c is preferably not more than the distribution area of the upper bolt holes 74 (as shown in S3).
The second and fourth regions are also located between the cross member 72 and the upper edges of the two lightening holes 76 (as shown in S4).
(2) Adhering a plurality of strain gauges to each high-resolution load identification point area; weighing: the strain gauge on the first area is a first strain gauge 1, the strain gauge on the second area is a second strain gauge 2, the strain gauge on the third area is a third strain gauge 3, and the strain gauge on the fourth area is a fourth strain gauge 4; since the number of the first strain gauge 1, the second strain gauge 2, the third strain gauge 3 and the fourth strain gauge 4 is plural, a group of full-bridge circuit structures can be formed by any one of the first strain gauge 1, any one of the second strain gauge 2, any one of the third strain gauge 3 and any one of the fourth strain gauge 4;
as shown in fig. 2, in each full-bridge circuit structure, the first strain gauge 1 and the second strain gauge 2 form an adjacent arm, the third strain gauge 3 and the fourth strain gauge 4 form an adjacent arm, the first strain gauge 1 and the fourth strain gauge 4 form a paired arm, and the second strain gauge 2 and the third strain gauge 3 form a paired arm;
(3) the framework structure adhered with the strain gauge is statically calibrated on a calibration test bed special for a multichannel loading force measurement framework, each full-bridge circuit structure is subjected to decoupling calculation one by one, and one or more groups of bridge structures with highest mutual decoupling precision or one or more groups of bridge structures meeting the decoupling precision requirement are found;
the decoupling accuracy refers to the response capability of the full-bridge circuit output to the tested force system, and the influence capability of other disturbance force systems (such as a vertical load force system) on the tested force system on the full-bridge circuit. The decoupling precision is high, which means that the full-bridge circuit has high response to the tested force system and is slightly influenced by the interference force system.
(4) Finishing the manufacture of the force measuring framework according to the finally determined bridge combination structure; namely, removing the redundant strain gauge, and if necessary, sticking the strain gauge again at the determined strain gauge sticking position; if desired, at least one set of redundant bridge structures (i.e., consisting of redundant strain gauges 5, 6, 7, 8) is arranged on each motor mount 71 of the dynamometric frame.
Therefore, the invention provides the braking force system testing structure of the hanging seat type force measuring framework and the manufacturing method thereof, which not only ensure the testing precision, but also enable the tested load and the structural strain to present a better quasi-static relationship.
Claims (8)
1. The utility model provides a vertical power of motor of hanging seat formula dynamometry framework is test structure, this hanging seat formula dynamometry framework has two curb girders and two crossbeams to be connected with the motor on the crossbeam and hang the seat, its characterized in that, it has high separation degree load identification point region to define on the motor hangs the seat, is respectively:
a first region: the motor hanging seat is positioned on the upper surface of the cross beam and connected with a motor hanging seat, a plurality of upper bolt holes are formed in the upper surface of the motor hanging seat, the cross beam corresponding to the motor hanging seat has an axial center line, a straight line which passes through the center line of the upper bolt holes and is parallel to the axial center line of the cross beam is a bolt center line, the centers of the plurality of upper bolt holes are also provided with bolt symmetrical center lines which are perpendicular to the bolt center line, and the first area is positioned between the axial center line and the bolt center line and positioned on one side of the bolt symmetrical center line, which is close to the near-end side beam;
a second region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, the lower part of the motor hanging seat is connected with the cross beam through the web plate, the web plate is provided with two oval lightening holes, the symmetrical center positions of the two lightening holes are provided with a lightening symmetrical center line which is vertical to the axial center line of the cross beam, and the second area is positioned between the long-axis extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the near-end side beam;
a third region: the upper surface of the cross beam is connected with the motor hanging seat, is positioned between the axial center line and the center line of the bolt and is positioned on one side of the symmetrical center line of the bolt close to the far-end side beam;
a fourth region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, positioned between long shaft extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the far-end side beam;
at least one strain gauge is pasted on each high-resolution load identification point area; weighing: the strain gauge on the first area is a first strain gauge, the strain gauge on the second area is a second strain gauge, the strain gauge on the third area is a third strain gauge, and the strain gauge on the fourth area is a fourth strain gauge; a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge on the same motor hanging seat form a full-bridge circuit structure;
in the full-bridge circuit structure, the first strain gauge and the second strain gauge form an adjacent arm, the third strain gauge and the fourth strain gauge form an adjacent arm, the first strain gauge and the third strain gauge form an arm pair, and the second strain gauge and the fourth strain gauge form an arm pair.
2. The structure of claim 1, wherein the vertical force system of the motor comprises: at least one group of standby full-bridge circuit structures are arranged on the motor hanging seat.
3. The structure of claim 1, wherein the vertical force system of the motor comprises: the distances between the first area, the third area and the symmetrical center line of the bolt do not exceed the distribution area of the upper bolt holes.
4. The structure of claim 1, wherein the vertical force system of the motor comprises: the second area and the fourth area are also positioned between the cross beam and the upper edges of the two lightening holes.
5. A method for manufacturing a motor vertical force system test structure of a hanging seat type force measurement framework is characterized in that the test method comprises the following steps:
(1) the motor hanging seat is defined with a high-resolution load identification point area which is respectively as follows:
a first region: the motor hanging seat is positioned on the upper surface of the cross beam and connected with a motor hanging seat, a plurality of upper bolt holes are formed in the upper surface of the motor hanging seat, the cross beam corresponding to the motor hanging seat has an axial center line, a straight line which passes through the center line of the upper bolt holes and is parallel to the axial center line of the cross beam is a bolt center line, the centers of the plurality of upper bolt holes are also provided with bolt symmetrical center lines which are perpendicular to the bolt center line, and the first area is positioned between the axial center line and the bolt center line and positioned on one side of the bolt symmetrical center line, which is close to the near-end side beam;
a second region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, the lower part of the motor hanging seat is connected with the cross beam through the web plate, the web plate is provided with two oval lightening holes, the symmetrical center positions of the two lightening holes are provided with a lightening symmetrical center line which is vertical to the axial center line of the cross beam, and the second area is positioned between the long-axis extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the near-end side beam;
a third region: the upper surface of the cross beam is connected with the motor hanging seat, is positioned between the axial center line and the center line of the bolt and is positioned on one side of the symmetrical center line of the bolt close to the far-end side beam;
a fourth region: the web plate positioned below the motor hanging seat is connected with the position of the cross beam, positioned between long shaft extension lines of the two lightening holes and positioned on one side of the lightening symmetrical center line close to the far-end side beam;
(2) adhering at least one strain gauge on each high-resolution load identification point area; weighing: the strain gauge on the first area is a first strain gauge, the strain gauge on the second area is a second strain gauge, the strain gauge on the third area is a third strain gauge, and the strain gauge on the fourth area is a fourth strain gauge; a first strain gauge, a second strain gauge, a third strain gauge and a fourth strain gauge on the same motor hanging seat form a full-bridge circuit structure;
in the full-bridge circuit structure, a first strain gauge and a second strain gauge form an adjacent arm, a third strain gauge and a fourth strain gauge form an adjacent arm, the first strain gauge and the fourth strain gauge form a paired arm, and the second strain gauge and the third strain gauge form a paired arm;
(3) the method comprises the following steps that static calibration is carried out on a framework structure attached with strain gauges on a multichannel loading force measurement framework calibration test bed, decoupling calculation is carried out on each full-bridge circuit structure one by one, and one or more groups of bridge structures with the highest mutual decoupling precision or one or more groups of bridge structures meeting the decoupling precision requirement are found;
(4) and finishing the manufacture of the force measuring framework according to the finally determined bridge combination structure.
6. The method of claim 5, wherein the method comprises the steps of: and (4) arranging at least one group of standby full-bridge circuit structures on the motor hanging seat.
7. The method of claim 5, wherein the method comprises the steps of: the distances between the first area, the third area and the symmetrical center line of the bolt do not exceed the distribution area of the upper bolt holes.
8. The method of claim 5, wherein the method comprises the steps of: the second area and the fourth area are also positioned between the cross beam and the upper edges of the two lightening holes.
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| CN202010664109.0A CN111829713B (en) | 2020-07-10 | 2020-07-10 | Motor vertical force system testing structure of hanging seat type force measurement framework and manufacturing method thereof |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3439761A (en) * | 1966-10-17 | 1969-04-22 | Blh Electronics | Strain-gage transducer structures |
| US5101651A (en) * | 1991-02-22 | 1992-04-07 | Amp Incorporated | Apparatus for determining the force imposed on a terminal during crimping thereof |
| CN102095534B (en) * | 2010-12-08 | 2014-02-19 | 上海交通大学 | Double rood beam high-sensitivity six-dimensional moment sensor |
| CN202213591U (en) * | 2011-08-10 | 2012-05-09 | 南车青岛四方机车车辆股份有限公司 | Lightweight bogie welding framework |
| CN103134621B (en) * | 2011-11-29 | 2016-01-06 | 北京交通大学 | The transverse load test structure of H type force-measuring framework |
| US20150219487A1 (en) * | 2014-01-31 | 2015-08-06 | Amstead Rail Company, Inc. | Railway freight car on-board weighing system |
| CN110608830A (en) * | 2018-06-15 | 2019-12-24 | 北京交通大学 | Braking force system testing structure of disc-shaped braking type force measuring framework and manufacturing method thereof |
| CN110608831A (en) * | 2018-06-15 | 2019-12-24 | 北京交通大学 | Longitudinal diamond load test structure of force measurement framework and manufacturing method thereof |
| CN110608840B (en) * | 2018-06-15 | 2024-06-04 | 北京交通大学 | Brake force system test structure of tread brake type force measuring framework and manufacturing method thereof |
| CN212621241U (en) * | 2020-07-10 | 2021-02-26 | 北京交通大学 | Motor vertical force system test structure of hanging seat type force measurement framework |
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