CN202485843U - Conduit force measuring device - Google Patents
Conduit force measuring device Download PDFInfo
- Publication number
- CN202485843U CN202485843U CN 201120554483 CN201120554483U CN202485843U CN 202485843 U CN202485843 U CN 202485843U CN 201120554483 CN201120554483 CN 201120554483 CN 201120554483 U CN201120554483 U CN 201120554483U CN 202485843 U CN202485843 U CN 202485843U
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- CN
- China
- Prior art keywords
- conduit
- balance
- model
- ring duct
- periphery
- Prior art date
- 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.)
- Withdrawn - After Issue
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Abstract
The present utility model relates to a conduit force measuring device. A tail shaft is arranged inside a model, one end of the tail shaft is connected with a rotating shaft, a propeller is arranged on the rotating shaft, a conduit is arranged on the periphery of the propeller, and a tail shaft tube is sleeved outside the tail shaft; in the model, an annular conduit balance is arranged on the periphery of the tail shaft tube, the inner circumference of the annular conduit balance is clearance fitted with the periphery of the tail shaft tube, the periphery of the middle part of the annular conduit balance is provided with an annular groove, holes are arranged on cylinder parts of two ends, and connecting screw threads are arranged on the peripheral surface which is close to an opening part; and one end of the annular conduit balance is connected with the conduit through a connecting tube and a support, and the other end and a flange disk are fixedly connected on a tail flange. In the device, conduit thrust is transmitted to the annular conduit balance arranged inside the model through the support, according to the Wheatstone bridge principle, axial force is reflected and calculated through a strain force measuring component of the annular conduit balance, and the conduit thrust can be accurately measured when testing.
Description
Technical field
The utility model relates to the hydrodynamic force field of measurement, the conduit device for measuring force of ducted propeller in especially a kind of ship model experiment under water.
Background technology
At present, for this extraordinary propeller thrust Study on Measurement of ducted propeller seldom, especially under water in the ship model experiment to the measurement of ring duct thrust.Conventional test methods is sword support balance to be set carry out dynamometry on ring duct; During but this method was tested under water, when the translational speed of model reached 3～4m/s, sword supported the contact site of balance and ring duct under the situation that receives screw propeller rotation generation thrust; Can produce jitter phenomenon; Even cause ring duct and screw propeller to collide, in addition, the mounting means that sword supports balance has destroyed model afterbody one-piece construction.And because the section of ring duct be thin airfoil type or knuckle line style, it is difficult greatly that the design of giving force balance and layout are brought, because of the disappearance of measurement means causes the hydrodynamic performance that can't understand in depth and accurately measure carrying pipe screw propeller boats and ships.
The utility model content
The applicant provides a kind of conduit device for measuring force, thereby can measure the conduit thrust of ducted propeller in the self-propulsion test under water to the defective of above-mentioned accurately measuring guide propeller nozzle thrust situation.
The technical scheme that the utility model adopted is following:
A kind of conduit device for measuring force, at model interior arrangement tailing axle, an end of tailing axle connects rotation axis, and screw propeller is installed on rotation axis, and the periphery of screw propeller is provided with conduit, also is with shaft tube in the outside of tailing axle; Inner in model; The peripheral unit ring duct balance of shaft tube, the interior week of said ring duct balance cooperates with the shaft tube circumferential play, and the middle part periphery of said ring duct balance has annular groove; Have the hole on the columnar portion of two ends, be provided with connecting thread near the outer peripheral face of oral area; One end of ring duct balance is connected on the conduit through connecting pipe, support, and the other end and ring flange are fixed on the tail flange.
It is further characterized in that:
Said shape conduit balance is the annulus cylindricality, and the hole that has on the columnar portion of ring duct balance two ends is the track shape hole.
Said support is three, and an end of each support is affixed and be mutually 120 ° with conduit respectively.
Said ring duct balance can adopt aluminum alloy materials.
The beneficial effect of the utility model is following:
The utility model is delivered to conduit thrust and is installed on the inner ring duct balance of model through support; Through the strain load-sensing unit on the ring duct balance; And according to the resistance bridge principle, reflect and calculate axial force, realized at the trial accurate measurement to conduit thrust; Remove and install conveniently, avoided the structure weakness and the security risk that occur in the actual measurement; And reasonable use the space of model afterbody, make the design and the arrangement convenience of force balance.
Description of drawings
Fig. 1 is the cut-open view of the utility model.
Fig. 2 is the partial structurtes synoptic diagram of the utility model.
Fig. 3 is the schematic perspective view of ring duct balance.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the utility model is described.
Like Fig. 1, shown in Figure 2, at model interior arrangement tailing axle 1, an end of tailing axle 1 connects rotation axis 4, and screw propeller 10 is installed on rotation axis 4, and the periphery of screw propeller 10 is provided with conduit 11; Outside at tailing axle 1 also is with shaft tube 2.Inner in model, the peripheral unit ring duct balance 7 of shaft tube 2, mutually noninterfere between ring duct balance 7 and the shaft tube 2 makes the ring duct balance 7 can be because of the rotation of tailing axle 1 and the vibrations of shaft tube 2, and measuring guide thrust is exerted an influence; The structure of ring duct balance 7 is as shown in Figure 3, and shape conduit balance 7 is the annulus cylindricality, adopts aluminum alloy materials.The interior week of ring duct balance 7 cooperates with shaft tube 2 circumferential plays; The middle part periphery of ring duct balance 7 has annular groove 7-1; Form thin-walled and connect bridge portion, have track shape hole 7-2 on the columnar portion of two ends, be provided with connecting thread 7-3 near the outer peripheral face of oral area; In annular groove 7-1, paste the layout foil gauge, the mode of pasting of foil gauge is followed resistance bridge principle (full-bridge circuit), and adopts silica gel sealing to fix, the requirement of, waterproof airtight to satisfy and insulation.Like Fig. 1, shown in Figure 2, an end of ring duct balance 7 is threaded with connecting pipe 8, and the other end and ring flange 3 are fixed on the tail flange 5.Affixed three positions are mutually 120 ° support 9 on the said conduit 10, and an end of support 9 passes tile 6 and is connected with connecting pipe 8.Tile 6 is for keeping the detachable and structure of installing of model tail shape and lines.
When making an experiment, through being installed on inner motor (not marking among the figure) work of model, tailing axle 1 work drives rotation axis 4 and rotates together, and screw propeller 10 is rotated.Screw propeller 10 rotations produce thrust; Thrust is passed to ring duct balance 7 uniformly through support 9, owing to be furnished with track shape hole 7-2 and foil gauge on the ring duct balance 7, track shape hole 7-2 plays the resiliency supported effect; In elastic range; Make the connection bridge portion of ring duct balance 7 axially produce elastic deformation, produce deformation, cause the variation of the foil gauge value of having a resistance thereby make foil gauge receive load.The variation of resistance value converts the voltage signal that is directly proportional with the power value signal into through measuring bridge, and this voltage signal converts through demarcating, and can converse the size of corresponding power value, thus the accurate measurement of conduit thrust in the implementation model test.
The method of testing that adopts the described conduit device for measuring force of the utility model to carry out is following:
The first step: after carrying out the coefficient demarcation, above-mentioned measurement mechanism is installed on ship model.
Second step: test and gather the resultant force signal that three supports are passed to the ring duct balance; Foil gauge receives load to produce deformation; Cause the variation of the foil gauge value of having a resistance, the variation of resistance value changes the voltage signal that is directly proportional with the power value signal into through measuring bridge.This measuring bridge adopts resistance bridge, the power supply of electric bridge employing+5V direct supply constant voltage; According to formula the increased resistance value of foil gauge is converted into voltage change:
In the formula;
is bridge output voltage;
is for supplying bridge voltage; This force balance is set to direct current 5V;
is the change in resistance size, and
is arm resistance or four-arm resistance.
The 3rd step: computing machine is gathered output voltage signal through signal wire, converts through demarcating, and obtains the size of conduit thrust, thus the accurate measurement of conduit thrust in the implementation model test.
The utility model is delivered to conduit thrust and is installed on the inner ring duct balance of model through support; Through the strain load-sensing unit on the ring duct balance; And according to the resistance bridge principle, reflect and calculate axial force, realized at the trial accurate measurement to conduit thrust; Remove and install conveniently, avoided the structure weakness and the security risk that occur in the actual measurement; And reasonable use the space of model afterbody, make the design and the arrangement convenience of force balance.
More than describing is the explanation to the utility model, is not the qualification to utility model, and the utility model institute restricted portion is referring to claim, and under the situation of the utility model basic structure, the utility model can be done any type of modification.
Claims (4)
1. conduit device for measuring force, at model interior arrangement tailing axle (1), an end of tailing axle (1) connects rotation axis (4); Go up installation screw propeller (10) in rotation axis (4), the periphery of screw propeller (10) is provided with conduit (11), also is with shaft tube (2) in the outside of tailing axle (1); It is characterized in that: inner in model; The peripheral unit ring duct balance (7) of shaft tube (2), the interior week of ring duct balance (7) cooperates with shaft tube (2) circumferential play, and the middle part periphery of ring duct balance (7) has annular groove (7-1); Have the hole on the columnar portion of two ends, be provided with connecting thread (7-3) near the outer peripheral face of oral area; One end of ring duct balance (7) is connected on the conduit (10) through connecting pipe (8), support (9), and the other end and ring flange (3) are fixed on the tail flange (5).
2. conduit device for measuring force as claimed in claim 1 is characterized in that: said shape conduit balance (7) is the annulus cylindricality, and the hole that has on the columnar portion of ring duct balance (7) two ends is track shape hole (7-2).
3. conduit device for measuring force as claimed in claim 1 is characterized in that: said support (9) is three, and an end of each support (9) is affixed and be mutually 120 ° with conduit (10) respectively.
4. conduit device for measuring force as claimed in claim 1 is characterized in that: said ring duct balance (7) can adopt aluminum alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120554483 CN202485843U (en) | 2011-12-27 | 2011-12-27 | Conduit force measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120554483 CN202485843U (en) | 2011-12-27 | 2011-12-27 | Conduit force measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202485843U true CN202485843U (en) | 2012-10-10 |
Family
ID=46960258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120554483 Withdrawn - After Issue CN202485843U (en) | 2011-12-27 | 2011-12-27 | Conduit force measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202485843U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435372A (en) * | 2011-12-27 | 2012-05-02 | 中国船舶重工集团公司第七○二研究所 | Conduit dynamometry device |
| CN103604600A (en) * | 2013-12-09 | 2014-02-26 | 上海市东方海事工程技术有限公司 | Strain propeller electric test dynamometer |
-
2011
- 2011-12-27 CN CN 201120554483 patent/CN202485843U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435372A (en) * | 2011-12-27 | 2012-05-02 | 中国船舶重工集团公司第七○二研究所 | Conduit dynamometry device |
| CN103604600A (en) * | 2013-12-09 | 2014-02-26 | 上海市东方海事工程技术有限公司 | Strain propeller electric test dynamometer |
| CN103604600B (en) * | 2013-12-09 | 2016-02-24 | 上海市东方海事工程技术有限公司 | Strain-type propeller electric test dynamometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20130327 |
|
| RGAV | Abandon patent right to avoid regrant |