CN2802482Y - Device for measuring axial force for pump - Google Patents
Device for measuring axial force for pump Download PDFInfo
- Publication number
- CN2802482Y CN2802482Y CN 200520078341 CN200520078341U CN2802482Y CN 2802482 Y CN2802482 Y CN 2802482Y CN 200520078341 CN200520078341 CN 200520078341 CN 200520078341 U CN200520078341 U CN 200520078341U CN 2802482 Y CN2802482 Y CN 2802482Y
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- CN
- China
- Prior art keywords
- bearing
- axial force
- pump
- spoke
- bearing body
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- Expired - Fee Related
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Abstract
The utility model mainly relates to structure of a device for measuring the axial force of centrifugal pumps. The utility model is mainly used for measuring the axial force of centrifugal pumps at any time and at any place and can be used in other mechanical devices that the axial force and the actual change rule of a rotor need mastering during the operation of the rotor. A device for measuring the axial force of pumps comprises a bearing (1-2) arranged on the non-drive end (1-1) of a shaft of a centrifugal pump. The utility model is mainly characterized in that the utility model also comprises a bearing box (1-3) arranged on the outer circle of the bearing (1-2) and a bearing body (1-16) arranged on the outer circle of the utility model; a guide key (1-4) is arranged between the bearing body (1-16) and the bearing box (1-3); an end cover (1-14) of the bearing body is fixedly connected with the bearing body (1-16); the upright end of the utility model is provided with a shearing type force sensor (1-12), and a spoke of the shearing type force sensor is glued with strain sheets; a press cover (1-5) of the bearing box tightly presses the bearing (1-2) in the bearing box (1-3) along an axial direction; a tappet (1-6) is fixedly connected to the center of the utility model and passes out the end cover (1-14) of the bearing to be fixedly connected with the spoke shearing type force sensor (1-12). The utility model has the advantages of high precision, small delay, high repeated performance, high linearity, strong eccentric load resistance, low height, small size and light weight.
Description
Technical field:
The utility model relates generally to the structure of the determinator of centrifugal pump axial force.The utility model is mainly used in measures the centrifugal pump axial force whenever and wherever possible in the centrifugal pump, be necessary quantitatively to grasp in other plant equipment of axial force and actual change rule thereof when also can be used for the rotor running.
Background technology
Centrifugal pump is in operational process, and axial force changes.Especially in multistage centrifugal pump, the variation of this axial force especially value big, change fast, have nothing in common with each other with the difference of impeller arrangement.Engineering practice confirms, because of axial force not being accomplished quantitatively to understand and quantitatively control, causes the failure rate of multistage centrifugal pump very high whenever and wherever possible.In the prior art, do not retrieve determinator to the centrifugal pump axial force.
The utility model content:
The purpose of this utility model is to avoid the deficiencies in the prior art part and a kind of pump axial force determinator is provided, and is used for directly measuring and showing the actual size and the direction of centrifugal pump axial force whenever and wherever possible.
The purpose of this utility model can be by realizing by the following technical solutions: a kind of pump is with measuring the axial force device, the anti-drive end (1-1) that includes at centrifugal pump shaft is provided with bearing (1-2), its principal feature is that the outer ring that also includes bearing (1-2) is provided with bearing box (1-3), its outer ring is provided with bearing body (1-16), and feather key (1-4) is located between bearing body (1-16) and the bearing box (1-3); Bearing body end cap (1-14) is connected with bearing body (1-16), and its stud end is provided with the shearing force transducer (1-12) that posts foil gauge on spoke; Bearing box gland (1-5) is pressed on bearing (1-2) in (1-3) vertically, and its center is fixed with tappet (1-6), passes bearing body end cap (1-14) and is connected with the shearing force transducer of spoke (1-12).
Described pump is with measuring the axial force device, it is characterized in that also including between the stud end of bearing body end cap (1-14) and the shearing force transducer (1-12) that is posting foil gauge on the spoke being provided with the same shearing force transducer (1-15) that posts foil gauge on spoke.
Described pump is used and is measured the axial force device, it is characterized in that also including between two sensors (1-12,1-15) also being provided with annular fixed head (1-13); Tappet (1-6) passes bearing body end cap (1-14) and is connected with the shearing force transducer of spoke (1-12,1-15), also is provided with the tappet sleeve (1-8) that equates with annular fixed head (1-13) thickness between its two sensors (1-12,1-15).
Described pump is used and is measured the axial force device, it is characterized in that also including on force transducer (1-12,1-15) spoke being pasted with foil gauge, and the foil gauge bridge-type connects, and draws signal wire.
Described pump is characterized in that also including bearing box (1-3) and slides vertically in bearing body (1-16) with measuring the axial force device, and stroke is 5～7mm.
Described pump is characterized in that also including described bearing (1-2) and can be the thrust bearing (1-2) that bears the bi-directional axial load or be the angular contact ball bearing of mounted in pairing mode with measuring the axial force device.
Described pump is characterized in that also being included in the pump housing and is provided with lubricating cup (1-17) with measuring the axial force device; Be provided with oil hole on tappet (1-6), there is lubricating cup (1-11) its outer end.
Described pump is used and is measured the axial force device, it is characterized in that also being included in being provided with water proof and dust proof cover (1-10) on the column side of bearing body end cap (1-14), which is provided with air vent and sensor lead hole.
The invention has the beneficial effects as follows, simple in structure, reasonable in design.Can show the actual size and the direction of axial force in the pump operation process at any time, when axial force exceeds design load, can report to the police immediately,, prevent to cause the fault of pump because of axial force is excessive so that take to reduce other concrete measure of axial force.
Use two shearing force transducers of identical spoke, this is a kind of more novel force transducer, it measures load by the shear stress of measuring on the spoke, its advantage is the precision height, it is little to lag behind, repeatability and linearity height, anti-bias load ability by force, highly low, size is little, in light weight.
This device has size characteristics little, simple in structure, easy to install.Use to confirm through reality: to same pump, the measured value of this device is identical with the measured value of the experiment table that can accurately measure the centrifugal pump axial force, have use reliable, accuracy of measurement is high, the advantage of long service life.Owing to can grasp the true axial force value in the pump operation whereby at any time, especially when axial force surpasses threshold value, can take to reduce the concrete measure of axial force immediately, thereby improve greatly the average maintenance life-span (MOL) and the average life of multistage centrifugal pump.
Description of drawings:
Be described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing:
Fig. 1 a is the utility model embodiment 1 front view.
Fig. 1 b is the utility model embodiment 1 foil gauge bridge circuit line graph.
Fig. 2 a is the utility model embodiment 2 front views.
Fig. 2 b is the utility model embodiment 2 foil gauge bridge circuit line graphs.
Fig. 3 is the utility model embodiment 3 front views.
Embodiment:
Embodiment 1: see Fig. 1, pump is with measuring the axial force device, and the anti-drive end 1-1 that includes at centrifugal pump shaft is provided with the deep groove ball bearing 1-2 that can bear certain bi-directional axial load, helps improving the limit speed of bearing.The outer ring of bearing 1-2 is provided with bearing box 1-3, its outer ring is provided with bearing body 1-16, feather key 1-4 is located between bearing body 1-16 and the bearing box 1-3, prevent that bearing box from rotating and limit bearing box 1-3 and can only in bearing body 1-16, slide vertically, afterwards the line shaft of institute's permission pump rotor is identical to shifting amount to require the multistage pump assembling in the free travel of sliding and the engineering practice, is 6 ± 1mm.Two O RunddichtringO 1-18 are contained in the tolerance clearance two ends of bearing box 1-3, bearing body 1-16.Bearing body end cap 1-14 and bearing body 1-16 are connected, and its stud end is provided with the shearing force transducer 1-12 that posts foil gauge on spoke.Bearing box gland 1-5 is pressed on bearing 1-2 in the bearing box 1-3 vertically by fine thread, its center is fixed with tappet 1-6, pass bearing body end cap 1-14, the sensor 1-12 on tappet 1-6 is adjusted tightening by tightening garden nut 1-7, the 1-9 of both sides.Four spokes that all have four identical and relative positions on each force transducer and with the wheel shaft be symmetry are as four pickup arms, a tensile strain sheet and bearing strain sheet are posted in the both sides of every spoke, paste foil gauge in force transducer 1-12 spoke both sides, totally eight identical foil gauges require each foil gauge to have the identical linearity during with compression set at tensile deformation.Two foil gauges that are attached to spoke both sides require to paste appropriate, make spoke when the distortion of a certain direction takes place, and a foil gauge produces tensile deformation, and another produces compression set.Then these eight foil gauges are connected into fourth class arm electric bridge form as Fig. 1 (b), wherein per two arms that are in the foil gauge series connection back of tensile deformation state as electric bridge simultaneously, per two another arms that are in the foil gauge series connection back of compression set state as electric bridge simultaneously, then the arm of all tensile deformations and the arm of compression set are linked to be bridge circuit as alternate arm, promptly in Fig. 1 (b), make and work as R
1, R
4R when being in tensile deformation
2, R
3Be in the compression set state, work as R
1, R
4R when being in compression set
2, R
3Be in the tensile deformation state.When static (or axial force is zero), tightening garden nut 1-7, the 1-9 that will be enclosed within the sensor 1-12 both sides on the tappet 1-6 as Fig. 1 (a) are adjusted tightening, make pump rotor be in the center position of axial free travel, and at this moment pickup arm is indeformable, the R of foil gauge
1, R
2, R
3, R
4Resistance equates, bridge output voltage U
2=U
A-U
B=0; When the axial force direction of pump is when pointing to anti-drive end by drive end, R
1, R
4Be stretched R
2, R
3Be compressed the bridge circuit output voltage U
2=U
A-U
B＜0, the expression axial force is for negative; When the axial force direction of pump is when pointing to drive end by anti-drive end, R
1, R
4Be compressed R
2, R
3Be stretched the bridge circuit output voltage U
2=U
A-U
B＞0, the expression axial force is for just.Draw signal wire and draw signal.On the pump housing, be provided with lubricating cup 1-17; Be provided with oil hole on tappet 1-6, there is lubricating cup 1-11 its outer end.On the column side of bearing body end cap 1-14, be provided with water proof and dust proof cover 1-10, which is provided with air vent and sensor lead hole.
Embodiment 2: see Fig. 2, pump is with measuring the axial force device, is provided with the same shearing force transducer 1-15 that posts foil gauge on spoke between the stud end of bearing body end cap 1-14 and the shearing force transducer 1-12 that is posting foil gauge on the spoke.Two shearing force transducers of identical spoke are installed in the other direction, and 8 foil gauges on each sensor connect with differential bridge penalty method bridge circuit, have two output signals, and axial force is corresponding to the difference of two signals, and are provided with and draw signal wire.Four spokes that all have four identical and relative positions on each force transducer and with the wheel shaft be symmetry are as four pickup arms, and a tensile strain sheet and bearing strain sheet are posted in the both sides of every spoke, and all foil gauge paste positions make every effort to identical.Paste 8 foil gauges (four tensile strain sheets on each force transducer altogether, four bearing strain sheets), per two tensile strain sheets series connection back is as an arm of electric bridge, per two bearing strain sheets series connection back is as another arm of electric bridge, tensile strain sheet arm is alternate each other with bearing strain sheet arm, is connected into bridge circuit by Fig. 2 (b) with the differential bridge penalty method, and makes two sensors that the pretension deflection be arranged, when spoke elastic deformation did not take place, the bridge circuit output voltage was zero.When spoke generation elastic deformation, the bridge circuit output voltage is the voltage difference at two ends.Bearing 1-2 can be the angular contact ball bearing of mounted in pairing mode.Other structure is identical with embodiment 1.
Embodiment 3: see Fig. 3, pump also is provided with annular fixed head 1-13 with measuring the axial force device between two sensors 1-12,1-15.Tappet 1-6 passes bearing body end cap 1-14, and the other end is fixed with the shearing force transducer 1-15 of spoke successively, with the tappet sleeve 1-8 that annular fixed head 1-13 thickness equates, and the shearing force transducer 1-12 of spoke.The wheel hub of two force transducer 1-12,1-15 is pressed on the tappet 1-6 from both sides with tightening garden nut 1-7 and 1-9 respectively, by means of the elastic deformation force of sensor spoke its wheel rim is pressed on the annular fixed head 1-13 from both sides.Tightening garden nut 1-7 and 1-9 are during from the wheel hub of both sides tightening force transducer 1-12 and force transducer 1-15, just in time make bearing box be in the center position of free travel, the elastic force that makes two sensor wheel rims compress annular fixed head from both sides simultaneously is maximum about 1.5 times of allowing absolute value of this pump axial force.The structure of sensor is identical with embodiment 2 with line, because this moment, two force transducer deflections were identical, output voltage is identical, and the difference of output signal voltage is zero, although i.e. U
2A=U
2B≠ 0, but U
2B-U
2A=0.Other structure is identical with embodiment 1.
Claims (8)
1. a pump is with measuring the axial force device, the anti-drive end (1-1) that includes at centrifugal pump shaft is provided with bearing (1-2), it is characterized in that the outer ring that also includes bearing (1-2) is provided with bearing box (1-3), its outer ring is provided with bearing body (1-16), and feather key (1-4) is located between bearing body (1-16) and the bearing box (1-3); Bearing body end cap (1-14) is connected with bearing body (1-16), and its stud end is provided with the shearing force transducer (1-12) that posts foil gauge on spoke; Bearing box gland (1-5) is pressed on bearing (1-2) in (1-3) vertically, and its center is fixed with tappet (1-6), passes bearing body end cap (1-14) and is connected with the shearing force transducer of spoke (1-12).
2. pump as claimed in claim 1 is with measuring the axial force device, it is characterized in that also including between the stud end of bearing body end cap (1-14) and the shearing force transducer (1-12) that is posting foil gauge on the spoke being provided with the same shearing force transducer (1-15) that posts foil gauge on spoke.
3. pump as claimed in claim 2 is used and is measured the axial force device, it is characterized in that also including between two sensors (1-12,1-15) also being provided with annular fixed head (1-13); Tappet (1-6) passes bearing body end cap (1-14) and is connected with the shearing force transducer of spoke (1-12,1-15), also is provided with the tappet sleeve (1-8) that equates with annular fixed head (1-13) thickness between its two sensors (1-12,1-15).
As claim 1 or 2 or 3 described pumps with measuring the axial force devices, it is characterized in that also including on force transducer (1-12,1-15) spoke and be pasted with foil gauge, the foil gauge bridge-type connects, and draws signal wire.
5. pump as claimed in claim 4 is characterized in that also including bearing box (1-3) and slides vertically in bearing body (1-16) with measuring the axial force device, and stroke is 5～7mm.
6. pump as claimed in claim 1 is characterized in that also including described bearing (1-2) and can be the thrust bearing (1-2) that bears the bi-directional axial load or be the angular contact ball bearing of mounted in pairing mode with measuring the axial force device.
7. pump as claimed in claim 1 is characterized in that also being included in the pump housing and is provided with lubricating cup (1-17) with measuring the axial force device; Be provided with oil hole on tappet (1-6), there is lubricating cup (1-11) its outer end.
8. pump as claimed in claim 1 is used and is measured the axial force device, it is characterized in that also being included in being provided with water proof and dust proof cover (1-10) on the column side of bearing body end cap (1-14), which is provided with air vent and sensor lead hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078341 CN2802482Y (en) | 2005-01-30 | 2005-01-30 | Device for measuring axial force for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078341 CN2802482Y (en) | 2005-01-30 | 2005-01-30 | Device for measuring axial force for pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2802482Y true CN2802482Y (en) | 2006-08-02 |
Family
ID=36847190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520078341 Expired - Fee Related CN2802482Y (en) | 2005-01-30 | 2005-01-30 | Device for measuring axial force for pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2802482Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750245B (en) * | 2008-11-28 | 2011-05-25 | 中国船舶重工集团公司第七一一研究所 | Test method for contact stress of cam driving mechanism of diesel fuel system |
| CN102434445A (en) * | 2011-11-08 | 2012-05-02 | 襄樊五二五泵业有限公司 | Axial force measurement device and test method of magnetic pump under instant high temperature difference environment |
| CN102735376A (en) * | 2012-07-11 | 2012-10-17 | 哈尔滨工程大学 | Method for measuring dynamic transfer force of device leg |
| CN103147999A (en) * | 2013-03-04 | 2013-06-12 | 上海凯泉泵业（集团）有限公司 | Axial force measuring device and method for multistage direct-connection centrifugal pump |
| CN103940540A (en) * | 2014-04-14 | 2014-07-23 | 上海交通大学 | Measuring device and method of fluid dynamic axial force of vertical type wet rotor of shielded motor |
| CN105092129A (en) * | 2015-07-09 | 2015-11-25 | 广东省佛山水泵厂有限公司 | Rotation machine axial force testing apparatus and testing method thereof |
| CN106353025A (en) * | 2016-09-29 | 2017-01-25 | 安徽合力股份有限公司 | Device for detecting axial force of fork truck hydraulic gearbox |
| CN112165204A (en) * | 2020-10-15 | 2021-01-01 | 江苏万顺新能源科技有限公司 | Bearing inner and outer cover for wind driven generator |
-
2005
- 2005-01-30 CN CN 200520078341 patent/CN2802482Y/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101750245B (en) * | 2008-11-28 | 2011-05-25 | 中国船舶重工集团公司第七一一研究所 | Test method for contact stress of cam driving mechanism of diesel fuel system |
| CN102434445A (en) * | 2011-11-08 | 2012-05-02 | 襄樊五二五泵业有限公司 | Axial force measurement device and test method of magnetic pump under instant high temperature difference environment |
| CN102434445B (en) * | 2011-11-08 | 2014-06-04 | 襄樊五二五泵业有限公司 | Axial force measurement device and test method of magnetic pump under instant high temperature difference environment |
| CN102735376A (en) * | 2012-07-11 | 2012-10-17 | 哈尔滨工程大学 | Method for measuring dynamic transfer force of device leg |
| CN102735376B (en) * | 2012-07-11 | 2013-12-18 | 哈尔滨工程大学 | Method for measuring dynamic transfer force of device leg |
| CN103147999B (en) * | 2013-03-04 | 2016-01-20 | 上海凯泉泵业（集团）有限公司 | A kind of axial force measuring device for multistage direct connected centrifugal pump and method |
| CN103147999A (en) * | 2013-03-04 | 2013-06-12 | 上海凯泉泵业（集团）有限公司 | Axial force measuring device and method for multistage direct-connection centrifugal pump |
| CN103940540A (en) * | 2014-04-14 | 2014-07-23 | 上海交通大学 | Measuring device and method of fluid dynamic axial force of vertical type wet rotor of shielded motor |
| CN103940540B (en) * | 2014-04-14 | 2016-03-02 | 上海交通大学 | Protected type motor vertical wet rotor hydrodynamic axial-force testing device and method |
| CN105092129A (en) * | 2015-07-09 | 2015-11-25 | 广东省佛山水泵厂有限公司 | Rotation machine axial force testing apparatus and testing method thereof |
| CN105092129B (en) * | 2015-07-09 | 2018-07-24 | 广东肯富来泵业股份有限公司 | A kind of axial-force testing device and its test method of rotating machinery |
| CN106353025A (en) * | 2016-09-29 | 2017-01-25 | 安徽合力股份有限公司 | Device for detecting axial force of fork truck hydraulic gearbox |
| CN106353025B (en) * | 2016-09-29 | 2022-07-05 | 安徽合力股份有限公司 | Device for detecting axial force of hydraulic gearbox of forklift |
| CN112165204A (en) * | 2020-10-15 | 2021-01-01 | 江苏万顺新能源科技有限公司 | Bearing inner and outer cover for wind driven generator |
| CN112165204B (en) * | 2020-10-15 | 2021-11-23 | 江苏万顺新能源科技有限公司 | Bearing inner and outer cover for wind driven generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060802 Termination date: 20130130 |