CN108981984A - For the load-measuring device under hot conditions - Google Patents
For the load-measuring device under hot conditions Download PDFInfo
- Publication number
- CN108981984A CN108981984A CN201810709651.6A CN201810709651A CN108981984A CN 108981984 A CN108981984 A CN 108981984A CN 201810709651 A CN201810709651 A CN 201810709651A CN 108981984 A CN108981984 A CN 108981984A
- Authority
- CN
- China
- Prior art keywords
- load
- measuring
- elastic component
- transmission pole
- under hot
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2268—Arrangements for correcting or for compensating unwanted effects
- G01L1/2281—Arrangements for correcting or for compensating unwanted effects for temperature variations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
Abstract
The present invention relates to a kind of load-measuring devices under hot conditions, including measuring cell, measuring bridge and load transmission pole, measuring bridge obtains load value in the data conversion that the movement of load transmission pole obtains according to testing element, it further include measuring chamber, temperature-compensation circuit and physics cooling body, load transmission pole one end is linkage end, the other end is as measurement end, measuring cell includes elastic component and resistance strain gage, elastic component is fixed between measurement end and measuring chamber, resistance strain gage is installed on each elastic component, when load transmission pole relative measurement room circumferentially rotates, elastic component deformation is converted to resistance data by resistance strain gage, temperature compensated circuit transmission is to measuring bridge, physics cooling body, which is set in measuring chamber, is cooled down measuring cell by contact conduction.Using the above scheme, the present invention provides a kind of load-measuring device being used under hot conditions for improving measurement data accuracy.
Description
Technical field
The present invention relates to a kind of load measurement fields, and in particular to a kind of load-measuring device under hot conditions.
Background technique
In Measurement of Material Mechanical Performance, load-measuring device often is used to measure load numerical value, i.e. structure or structure
Part generates the external force of internal force and deformation and the numerical values recited of other factors, wide including measurement axial force and turning moment
The general scene that mechanical load DATA REASONING is needed applied to every field.
In order to improve the accuracy of load measurement, some elastic sensing elements can be set for surveying in load-measuring device
Amount, but during actual measurement, the case where which will appear fever, generate heat caused by heat make this
Device output signal and conversion factor drift, and then make to obtain data distortion.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of use for improving measurement data accuracy
Load-measuring device under hot conditions.
To achieve the above object, the present invention provides the following technical scheme that including that measuring cell, measuring bridge and load pass
Defeated bar, the measuring bridge obtains load value in the data conversion that the movement of load transmission pole obtains according to testing element, special
Sign is: further include measuring chamber, temperature-compensation circuit and physics cooling body, described load transmission pole one end be linkage end with
Measured component is linked, the other end protruded into test cabinet as measurement end and can relative measurement room circumferentially rotate and axial move
Dynamic, the measuring cell includes elastic component and resistance strain gage, and the elastic component is fixed between measurement end and measuring chamber,
The resistance strain gage is installed on each elastic component, and the load transmission pole relative measurement room circumferentially rotates or moves axially
When, elastic component deformation is converted to resistance data, temperature compensated circuit transmission to measuring bridge, the object by resistance strain gage
Reason cooling body, which is set in measuring chamber, is cooled down measuring cell by contact conduction.
By using above-mentioned technical proposal, in order to control influence of the temperature to measuring cell, this programme from physical compensation and
The two ways of electric compensation plays a role respectively, guarantees that the temperature of measuring cell maintains in low and stable state, physics
Cooling body takes away the heat of measuring cell by way of contacting heat exchange, and temperature-compensation circuit then passes through electric compensation
The data that mode obtains resistance strain gage according to temperature actual numerical value carry out pre-corrected, then are transmitted to measuring bridge, the two to
Combination greatly improves the load value exact value obtained, in addition, the elastic component being fixed between measurement end and measuring chamber is selected to match
The formed measuring cell of resistance strain gage is closed, expands the deformation amplitude generated when the movement of load transmission pole for detection, to axial direction
The measurement of power and turning moment is sensitiveer, further increases the accuracy of data acquisition, significantly improves the temperature upper limit of test.
The present invention is further arranged to: the quantity at least two of the elastic component, and load transmission pole is respectively set
Periphery, the physics cooling body include cooling duct and communication passage, and the cooling duct is set in elastic component, and one
End extends on the outside of measuring chamber, and the other end extends to load transmission pole, the cooling duct of the elastic component described at least one one
Enter channel as the cooling that coolant enters, the cooling duct of the elastic component described at least one is used as flows out for coolant
Cooling flow pass, the communication passage is set in load transmission pole, and enters channel and cooling outflow is logical for cooling
Road carries out connection.
By using above-mentioned technical proposal, circulation bridge of the elastic component as coolant is selected, rationally utilizes structure, simultaneously
Coolant carries out heat exchange inside the elastic component, make cooling efficiency and it is comprehensive be optimal, can be in a short time to measurement
Element cools down, and avoids temperature fluctuation and temperature from increasing generated deviation, and rationally using load transmission pole as cooling
The cooling duct of each elastic component is carried out connection by " terminal " of agent, and the coolant of input can be exported quickly, and structure is significantly simple
Change, realize coolant quickly through and circulation, further increase cooling efficiency, while being also the cooling to load transmission pole,
It avoids external heat from being transferred to elastic component from load transmission pole to have an impact, various combinations guarantee the stability of temperature.
The present invention is further arranged to: the coolant be R11 coolant or R113 coolant or R114 coolant or
R21 coolant.
By using above-mentioned technical proposal, since application environment is high-temperature low-pressure state, therefore above-mentioned several coolants are selected,
Performance is more excellent.
The present invention is further arranged to: the load transmission pole is made of loop bar and core bar, the loop bar and core bar
Be coaxially disposed and be provided with the slotting chamber for core bar insertion, be equipped between the loop bar and core bar both be synchronization action connection
Dynamic pin, core bar end corresponding with linkage end extend to outside loop bar and are linked with measured component, the bullet
Property part is fixed on loop bar end corresponding with measurement end periphery, and the other end that the core bar is linked with measured component is set
It is equipped with and supports the position-arresting disk matched with set rod end surface.
By using above-mentioned technical proposal, load transmission pole is divided into loop bar and core bar two parts, core bar one end passes through limit
Position disk is supported with set rod end surface matches, and the other end is linked with measured component, has both when being measured member acts more preferable
Mounting stability, i.e. raising acts synchronism, guarantees the accuracy of measurement, and loop bar and core bar can be realized in plug set bar
Dismounting, it is more convenient to operate.
The present invention is further arranged to: the measuring chamber is provided with the end cap of dismounting mouth and closing dismounting mouth, the dismounting
Confession staff presses position-arresting disk and extract core bar out of loop bar out.
By using above-mentioned technical proposal, dismounts confession staff pressing position-arresting disk and be measured core bar relatively from loop bar
The other end of component is extracted out, and the convenience of dismounting is improved.
The present invention is further arranged to: the core bar includes distributary division and confluence portion, and the section of the distributary division is in
Cross, the distributary division is respectively formed the split channel of four with different cooling duct connection from slotting cavity wall, described
The section in confluence portion is rounded, and the confluence portion forms the busway for different split channel connection, institute from slotting cavity wall
The split channel stated is combined with busway constitutes communication passage.
By using above-mentioned technical proposal, optimize structure, is automatically formed while core bar is inserted into loop bar cold for circulating
But the communication passage of agent, simplifies processing structure, and chamber is inserted when core bar extracts loop bar out to be complete cylindric, convenient for cleaning.
The present invention is further arranged to: the measuring chamber is in sealed set.
By using above-mentioned technical proposal, the measuring chamber of sealing avoids impurity from entering in measuring chamber, and measuring contamination is indoor
Measure environment.
The present invention is further arranged to: each elastic component is placed with several resistance with the side surrounding of deformation and answers
Become piece, forms resistance strain gage group.
By using above-mentioned technical proposal, the formation resistance strain gage group of multiple resistance strain gages, everywhere deformation can be by
Moment detection obtains data more accurately, comprehensively, keeps the working condition of each resistance strain gage synchronous.
The present invention is further arranged to: the quantity of the elastic component is four, and along the circumferentially equidistant row of load transmission pole
It is distributed in load transmission pole periphery.
By using above-mentioned technical proposal, the quantity of elastic component preferably four, and load transmission pole is circumferentially equidistant is arranged in
Load transmission pole periphery, structure is more excellent while guaranteeing measuring accuracy, can effectively eliminate load transmission pole and loading device
Motion bar misalign or stretching experiment in sample end face it is not parallel in the case where, measure axial load when cross stream component to measurement
As a result influence.
Present invention will be further described below with reference to the accompanying drawings and specific embodiments.
Detailed description of the invention
Fig. 1 is the main view partial sectional view in the specific embodiment of the invention；
Fig. 2 is the A of Fig. 1 to cross-sectional view；
Fig. 3 is the B of Fig. 1 to cross-sectional view；
Fig. 4 is the circuit diagram of temperature-compensation circuit in the specific embodiment of the invention；
Fig. 5 is the circuit diagram of measuring bridge in the specific embodiment of the invention.
Specific embodiment
As Figure 1-Figure 5, the invention discloses a kind of load-measuring devices under hot conditions, including measurement
Element, measuring bridge and load transmission pole 1, measuring bridge turn according to testing element in the data that the movement of load transmission pole 1 obtains
It gets load value in return, further includes measuring chamber 2, temperature-compensation circuit and physics cooling body, 1 one end of load transmission pole is linkage end
11 are linked with measured component, the other end protruded into test cabinet as measurement end 12 and can relative measurement room 2 circumferentially rotate
And axial movement, measuring cell include elastic component 3 and resistance strain gage 31, elastic component 3 be fixed on measurement end 12 and measuring chamber 2 it
Between, resistance strain gage 31 is installed on each elastic component 3, when 1 relative measurement room 2 of load transmission pole circumferentially rotates or moves axially, electricity
It hinders foil gauge 31 and 3 deformation of elastic component is converted into resistance data, temperature compensated circuit transmission to measuring bridge, physics cooler
Structure, which is set in measuring chamber 2, is cooled down measuring cell by contact conduction, in order to control influence of the temperature to measuring cell,
This programme plays a role respectively from physical compensation and the two ways of electric compensation, guarantee the temperature of measuring cell maintain it is low and
In stable state, physics cooling body takes away the heat of measuring cell by way of contacting heat exchange, and temperature-compensating is electric
Road then carries out pre-corrected according to the data that temperature actual numerical value obtains resistance strain gage 31 by way of electric compensation, then passes
Transport to measuring bridge, the two greatly improves the load value exact value obtained to combination, in addition, select be fixed on measurement end 12 with
Elastic component 3 between measuring chamber 2 cooperates the formed measuring cell of resistance strain gage 31, expands when load transmission pole 1 acts and generates
It is sensitiveer to the measurement of axial force and turning moment for the deformation amplitude of detection, further increase the accurate of data acquisition
Property, the temperature upper limit of test is significantly improved, in present invention specific implementation, as shown in figure 3, measuring bridge passes through favour stone electricity
Bridge principle measures the resistance meausring bridge of the resistance variations of resistance-strain, is a kind of universal circuit, and the circuit structure is simple,
Accurately and reliably, it is applicable to the sensing element big to temperature value drift and carries out temperature-compensating, as shown in figure 4, temperature-compensation circuit
Compensation circuit is formed by according to the characteristic of temperature change for thermistor, is a kind of universal circuit, common are electric bridge compensation
Method.
The quantity at least two of elastic component 3, and 1 periphery of load transmission pole is respectively set, physics cooling body includes cold
But channel 4 and communication passage 13, cooling duct 4 are set in elastic component 3, and one end extends to 2 outside of measuring chamber, and the other end extends
To load transmission pole 1, the cooling duct 4 one of at least one elastic component 3 enters channel as the cooling entered for coolant, until
As the cooling flow pass flowed out for coolant, communication passage 13 is set to load biography for the cooling duct 4 of a few elastic component 3
In defeated bar 1, and enter channel and cooling flow pass progress connection for cooling, selects flow bridge of the elastic component 3 as coolant
Beam rationally utilizes structure, while coolant carries out heat exchange inside elastic component 3, make cooling efficiency and it is comprehensive be optimal,
It can cool down in a short time to measuring cell, temperature fluctuation and temperature is avoided to increase generated deviation, and rationally benefit
It uses load transmission pole 1 as " terminal " of coolant, the cooling duct 4 of each elastic component 3 is subjected to connection, the coolant of input
Can quickly export, structure greatly simplifies, realize coolant quickly through and circulation, further increase cooling efficiency, simultaneously
It is also the cooling to load transmission pole 1, avoids external heat from being transferred to elastic component 3 from load transmission pole 1 and have an impact, it is many-sided
Combination guarantees the stability of temperature, and the arrow without letter is that coolant identifies coolant flow direction in attached drawing 1, in addition, cooling
The end that channel 4 is located at 2 outside of measuring chamber is provided with threaded tube interface 41.
Coolant is R11 coolant or R113 coolant or R114 coolant or R21 coolant, since application environment is
High-temperature low-pressure state, therefore above-mentioned several coolants are selected, performance is more excellent.
Load transmission pole 1 is made of loop bar 14 and core bar 15, and loop bar 14 and core bar 15 are coaxially disposed and are provided with for core bar
The slotting chambers 16 of 15 insertions, be equipped between loop bar 14 and core bar 15 both be synchronization action set bar 17, core bar 15 and linkage
It holds 11 corresponding ends to extend to outside loop bar 14 and is linked with measured component, elastic component 3 is fixed on loop bar 14 and measurement
Hold 12 corresponding end peripheries, the other end that core bar 15 and measured component are linked, which is provided with to support with 14 end face of loop bar, matches
Position-arresting disk 151 divides load transmission pole 1 for 15 two parts of loop bar 14 and core bar, and 15 one end of core bar passes through position-arresting disk 151 and set
14 end face of bar, which is supported, matches, and the other end is linked with measured component, has preferably installation both when being measured member acts
Stability, i.e. raising act synchronism, guarantee the accuracy of measurement, and loop bar 14 and core bar 15 can be realized in plug set bar 17
Dismounting, it is more convenient to operate.
Measuring chamber 2 is provided with the end cap 22 of dismounting mouth 21 and closing dismounting mouth 21, which presses for staff
Position-arresting disk 151 extracts core bar 15 out out of loop bar 14, and dismounting mouth 21 presses position-arresting disk 151 for core bar 15 from loop bar for staff
14 are measured the other end extraction of component relatively, improve the convenience of dismounting.
Core bar 15 includes distributary division 151 and confluence portion 152, and the section of distributary division 151 is in cross, distributary division 151 and is inserted
16 inner wall of chamber is respectively formed the split channel 131 of four from different 4 connection of cooling duct, and the section in confluence portion 152 is rounded, converges
Stream portion 152 forms the busway 132 for different 131 connection of split channel from slotting 16 inner wall of chamber, and split channel 131 and confluence are logical
The combination of road 132 constitutes communication passage 13, optimizes structure, automatically forms while core bar 15 is inserted into loop bar 14 for cooling of circulating
The communication passage 13 of agent, simplifies processing structure, and chamber 16 is inserted when core bar 15 extracts loop bar 14 out to be complete cylindric, convenient for clear
It washes.
Measuring chamber 2 is in sealed set, and the measuring chamber 2 of sealing avoids impurity from entering in measuring chamber 2, in measuring contamination room 2
Environment is measured, in the specific embodiment of the invention, sealing ring can be set at dismounting mouth 21 and end cap 22 and inside measuring chamber 2
23, guarantee sealing performance.
There is each elastic component 3 side surrounding of deformation to be placed with several resistance strain gages 31, form resistance strain gage 31
Group, 31 groups of the formation resistance strain gage of multiple resistance strain gages 31, everywhere deformation can be detected constantly, and it is more quasi- to obtain data
Really, comprehensively, the coolant synchronous cooling in the channel 4 in addition, resistance strain gage 31 for surrounding arrangement can be cooled, answers each resistance
The working condition for becoming piece 31 is synchronous.
The quantity of elastic component 3 is four, and is arranged in 1 periphery of load transmission pole along load transmission pole 1 is circumferentially equidistant, elasticity
The quantity of part 3 preferably four, and load transmission pole 1 is circumferentially equidistant is arranged in 1 periphery of load transmission pole, is guaranteeing measuring accuracy
While structure it is more excellent, the motion bar that load transmission pole 1 and loading device can be effectively eliminated misalign or stretching experiment in sample
In the case that end face is not parallel, influence of the cross stream component to measurement result when measuring axial load.
The working method of load-measuring device is as follows: detected component is made up of mechanical linkage and load transmission pole to be joined
Dynamic cooperation will drive load transmission pole and synchronize and acted in detected member acts, and be passed in load transmission pole
When dynamic, the axial force and turning moment of generation make resistance strain gage deformation by elastic component, generate the electricity proportional to load
Signal is amplified and is recorded by signal amplifier again, and the data which passes through carry out pre-corrected, then are transmitted to measurement
Electric bridge obtains real data.
Claims (9)
1. a kind of load-measuring device under hot conditions, including measuring cell, measuring bridge and load transmission pole, described
Measuring bridge according to testing element load transmission pole movement obtain data conversion obtain load value, it is characterised in that: also
Including measuring chamber, temperature-compensation circuit and physics cooling body, described load transmission pole one end is linkage end and measured structure
Part is linked, the other end protruded into test cabinet as measurement end and can relative measurement room circumferentially rotate and move axially, it is described
Measuring cell include elastic component and resistance strain gage, the elastic component is fixed between measurement end and measuring chamber, described
Resistance strain gage is installed on each elastic component, when the load transmission pole relative measurement room circumferentially rotates or moves axially, resistance
Elastic component deformation is converted to resistance data, temperature compensated circuit transmission to measuring bridge, the physics cooling by foil gauge
Mechanism, which is set in measuring chamber, is cooled down measuring cell by contact conduction.
2. the load-measuring device according to claim 1 under hot conditions, it is characterised in that: the elastic component
Quantity at least two, and load transmission pole periphery is respectively set, the physics cooling body includes cooling duct and connection
Circulation passage, the cooling duct are set in elastic component, and one end extends on the outside of measuring chamber, and the other end extends to load transmission
The cooling duct one of bar, the elastic component described at least one enters channel as the cooling entered for coolant, at least one
The cooling duct of the elastic component is set to load as the cooling flow pass flowed out for coolant, the communication passage
In transmission pole, and enter channel and cooling flow pass progress connection for cooling.
3. the load-measuring device according to claim 2 under hot conditions, it is characterised in that: the coolant
For R11 coolant or R113 coolant or R114 coolant or R21 coolant.
4. the load-measuring device according to claim 2 under hot conditions, it is characterised in that: the load passes
Defeated bar is made of loop bar and core bar, and the loop bar and core bar are coaxially disposed and are provided with the slotting chamber for core bar insertion, described
Be equipped between loop bar and core bar both be synchronization action set bar, core bar end corresponding with end of linking extends to
Loop bar is outer and is linked with measured component, and the elastic component is fixed on loop bar end corresponding with measurement end periphery, institute
The other end that the core bar and measured component stated are linked, which is provided with, supports the position-arresting disk matched with set rod end surface.
5. the load-measuring device according to claim 5 under hot conditions, it is characterised in that: the measuring chamber
It is provided with the end cap of dismounting mouth and closing dismounting mouth, dismounting confession staff presses position-arresting disk and takes out core bar out of loop bar
Out.
6. the load-measuring device according to claim 5 under hot conditions, it is characterised in that: the core bar packet
Distributary division and confluence portion are included, the section of the distributary division is in cross, and the distributary division and slotting cavity wall are respectively formed four
It is a that the section in the confluence portion is rounded from the split channel of different cooling duct connection, the confluence portion with insert it is intracavitary
Wall forms the busway for different split channel connection, and the split channel is combined with busway constitutes communication passage.
7. the load-measuring device according to claim 1 under hot conditions, it is characterised in that: the measuring chamber
In sealed set.
8. the load-measuring device according to claim 1 under hot conditions, it is characterised in that: each elasticity
There is part the side surrounding of deformation to be placed with several resistance strain gages, form resistance strain gage group.
9. the load-measuring device according to claim 1 under hot conditions, it is characterised in that: the elastic component
Quantity be four, and be arranged in load transmission pole periphery along load transmission pole is circumferentially equidistant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810709651.6A CN108981984B (en) | 2018-07-02 | 2018-07-02 | Load measuring device for high-temperature conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810709651.6A CN108981984B (en) | 2018-07-02 | 2018-07-02 | Load measuring device for high-temperature conditions |
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| Publication Number | Publication Date |
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| CN108981984A true CN108981984A (en) | 2018-12-11 |
| CN108981984B CN108981984B (en) | 2020-12-29 |
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ID=64539728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810709651.6A Active CN108981984B (en) | 2018-07-02 | 2018-07-02 | Load measuring device for high-temperature conditions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111795056A (en) * | 2020-07-04 | 2020-10-20 | 孙浩 | Bolt |
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| CN111795056A (en) * | 2020-07-04 | 2020-10-20 | 孙浩 | Bolt |
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| CN108981984B (en) | 2020-12-29 |
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