CN101413838B - Apparatus for measuring plunger sub-oil film viscous friction - Google Patents
Apparatus for measuring plunger sub-oil film viscous friction Download PDFInfo
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- CN101413838B CN101413838B CN2008101620504A CN200810162050A CN101413838B CN 101413838 B CN101413838 B CN 101413838B CN 2008101620504 A CN2008101620504 A CN 2008101620504A CN 200810162050 A CN200810162050 A CN 200810162050A CN 101413838 B CN101413838 B CN 101413838B
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- plunger
- cylinder body
- lining
- force sensor
- friction force
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Abstract
The invention discloses a device for measuring viscous friction force of an oil film of a plunger pair in a plunger pump. The device comprises a cylinder body, an induction feeler lever, a connecting rod, a fastening screw, a sensor cable, a friction force sensor, a fixing nut, a plunger bushing, a spring closing ring, a flow guide rod and a check valve component. The flow guide rod and the plunger bushing are connected together by the spring closing ring to form a floating bushing assembly supported by static pressure, the viscous force in the 3D direction of the oil film is induced by the induction feller lever and is transmitted to the friction force sensor by the connecting rod with higher rigidity, and the cable of the friction force sensor is led to the central position of the cylinder body by a neck groove on the cylinder body, and the cable is led out by a main shaft of the plunger pump. The structure of the device reasonably uses a void part between plunger chambers on the cylinder body, which causes the friction force sensor with larger volume to have sufficient mounting space and ensures reliable and stable structure and reliable performance; and the ingenious design and the application of the integral mechanical structure realizes compact structure and reduced volume.
Description
Technical field
The present invention relates to a kind of oil film viscous friction measurement mechanism of crucial friction pair of axial plunger pump, especially relate to a kind of apparatus for measuring plunger sub-oil film viscous friction.
Background technology
The axial plunger pump/motor is one of of paramount importance dynamical element in the Hydraulic Field, and its plunger pair is that the plunger to-and-fro movement produces oil suction and presses oily workspace.The friction of the oil film of plunger pair and greasy property have directly determined the plunger pump performance.But because the space of the cylinder body at plunger cavity place is narrow and small, and the oil film viscous friction of plunger pair exists plunger axis to, circumferential both direction, and the viscous friction of oil film needs a special construction to respond to the power of all directions.Traditional experimental technique mainly is following several method:
1, static single plunger structure.Be exactly to process a single plunger cavity separately, static is installed on the experimental stand, and the plunger state that fluid passes through under a certain state in plunger cavity can detect to be studied.The Missouri Columbia University of the Zhejiang Polytechnical University and the U.S. all builds such experimental provision.Such device and the actual interior structure of ram pump differ greatly, and can not realize the function of ram pump basically, just single parts are studied qualitatively.Limitation is bigger.
2, half dynamic single plunger structure.Still process a plunger cavity separately and be fixed on the frame, driving plunger by mechanisms such as crank connecting links can slide in the plunger cavity, thus the situation when plunger work is simulated in the to-and-fro movement that realizes plunger.The RWTH of Germany developed so a kind of experimental provision.But owing to be the work of single plunger, and do not have the turning effect of plunger, therefore the work with actual ram pump motor still has a certain distance.
3, approximate dynamic single plunger structure based on the thought of model pump, adopts single plunger, single plunger is fixed, thereby the swash plate rotation drives plunger and slides in the plunger cavity, and by the friction force of swash plate the turning effect of plunger is added, so operating mode is more near reality.The Purdue University of the U.S. has developed such experiment table.But this experimental provision is still considered mutual disturbance and the distributing construction between the plunger and is had certain limitation owing to failing.
Development along with the microsensor technology, thought based on model pump, under the situation that does not change the ram pump structure substantially, the plunger sub-oil film of ram pump is carried out the technical development of friction testing, press for a kind of novel proving installation of exploitation, make it possible to test for the friction force of plunger sub-oil film is comprehensive.
Summary of the invention
The object of the present invention is to provide a kind of apparatus for measuring plunger sub-oil film viscous friction, thereby make the plunger lining float to respond to viscous friction from all directions of oil film by hydrostatic support, and designed the induction installation of three-dimensional force sensor, utilize the space between the plunger cavity, realization is measured its friction force, and guarantees that the original work structuring and the function of ram pump do not change.
The technical solution adopted for the present invention to solve the technical problems is:
Comprise cylinder body, induction feeler lever, connect connecting rod, sensor wire, friction force sensor, plunger lining, spring collar, water conservancy diversion rod member and retaining valve; In a plunger cavity of cylinder body, by spring collar water conservancy diversion rod member and plunger lining are linked together and to form floating bush assembly by hydrostatic support, wherein water conservancy diversion rod member and plunger cavity interference fit, the relative together water conservancy diversion rod member with spring collar of plunger lining floats, being fixed on the bulb that connects the induction feeler lever on connecting rod one end with hold-doun nut stretches in the sensing hole of plunger lining and responds to viscous friction, the fastened screw retention of other end while that connects connecting rod is on friction force sensor, friction force sensor is installed in the mounting groove of offering on the cylinder body, draw from a plurality of be equipped with retaining valve (the fluid of plunger cavity hydraulic oil is supported in the support slot of plunger lining.
Described cylinder body 1 flow end face outside surface is plane or concave spherical surface.
Described friction force sensor is three-dimensional force, two-dimentional power or a dimensional force sensor, and described induction feeler lever is three-dimensional force, two-dimentional power or one dimension power induction feeler lever.
Described plunger lining has a plurality of hydrostatic support windows, and the hydraulic oil of being drawn by the plunger cavity on the cylinder body supports the plunger lining.
The number of the plunger cavity on the described cylinder body is 2～11.
The useful effect that the present invention has is:
By cylinder body of the present invention, the viscous friction to all directions of the oil film of the plunger pair of ram pump under the situation that does not change the ram pump structure is substantially measured.The present invention is along with people's deeply producing the research of ram pump motor, people can further be made and can simulate the performance test that actual working conditions is carried out plunger pair friction force at the ram pump motor to the friction and the Study on Lubrication of ram pump motor plunger pair.The present invention all adopts mechanical principle design, dependable performance; The ingenious design and the application of integral mechanical structure make compact conformation, volume-diminished.
Description of drawings
Fig. 1 is a plunger pair friction testing device general assembly drawing.
Fig. 2 is a plunger pair friction testing device cut-open view.
Fig. 3 is a plunger pair friction testing device to test inductive means assembly drawing.
Fig. 4 is a plunger pair friction testing device hydrostatic support oil supply loop synoptic diagram.
Fig. 5 is plunger pair friction testing device float lining three-flute oil supply structure figure.
Among the figure: 1. cylinder body, 2. the induction feeler lever 3. connects connecting rod, 4. trip bolt, 5. sensor wire, 6. friction force sensor, 7. hold-doun nut, 8. plunger lining, 9. spring collar, 10. water conservancy diversion rod member, 11. retaining valves.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
As Fig. 1, Fig. 2, shown in Figure 3, the present invention includes cylinder body 1, induction feeler lever 2, connect connecting rod 3, trip bolt 4, sensor wire 5, friction force sensor 6, hold-doun nut 7, plunger lining 8, spring collar 9, water conservancy diversion rod member 10 and retaining valve 11; In the plunger cavity of cylinder body 1, by spring collar 9 water conservancy diversion rod member 10 and plunger lining 8 are linked together and to form floating bush assembly by hydrostatic support, water conservancy diversion rod member 10 in this floating bush assembly and plunger cavity rear end interference fit, plunger lining 8 can float by relative water conservancy diversion rod member 10 with spring collar 9, and the boss of spring collar 9 and water conservancy diversion rod member 10 is used for limiting mutually unsteady maximum displacement.Therefore the plunger lining 8 that floats can be floated by the axial of fluid and viscous friction driving radially, therefore in the time of can responding to plunger motion and the axially and radially viscous friction that produces of fluid, being fixed on the bulb that connects the induction feeler lever 2 on the connecting rod 3 with hold-doun nut 7 stretches in the sensing hole of plunger lining 8 and responds to viscous friction, connect connecting rod 3 and be fixed on the friction force sensor 6 by holding screw 4 simultaneously, friction force can be drawn by lead the viscous friction force signal from a plurality of directions from the wire casing of cylinder body 1.Friction force sensor 6 and connect connecting rod 3 and be fixed on the cylinder body 1 in the mounting groove of offering between two plunger cavities by holding screw 4.As shown in Figure 4, draw from a plurality of fluid that the plunger cavity of retaining valve 11 is installed hydraulic oil is supported in the support slot of plunger lining 8.
In order to guarantee that plunger lining 8 can be positioned at RC position in the plunger cavity of cylinder body 1, on plunger lining 8, offer a plurality of static pressure support slots, the fluid that draws from a plurality of different plunger cavities is transferred in each static pressure groove, because the oil liquid pressure height in each plunger cavity, low alternate, therefore draw fluid from the plunger cavity of a plurality of outs of phase, it is high pressure that assurance has the fluid of a plunger cavity at least, the fluid in high-pressure plunger chamber is introduced in the static pressure support slot of plunger lining 8 by retaining valve again, thereby make plunger lining 8 usefulness high-voltage oil liquids force to the heart, make plunger lining 8 be in quick condition, impression that can be responsive is from the variation of plunger cavity inner fluid viscous friction.
Described cylinder body 1 flow end face outside surface is plane or concave spherical surface.
Described friction force sensor 6 is three-dimensional force, two-dimentional power or a dimensional force sensor; Described induction feeler lever 2 is three-dimensional force, two-dimentional power or one dimension power induction feeler lever.
Described plunger lining 8 has a plurality of hydrostatic support windows, and the hydraulic oil of being drawn by the plunger cavity on the cylinder body 1 supports the plunger lining.
The number of the plunger cavity on the described cylinder body is 2～11.
As Fig. 2, Fig. 3, shown in Figure 4, in the plunger cavity of cylinder body, by spring collar diversion rod and plunger lining are linked together and to form floating bush assembly by hydrostatic support, diversion rod in this floating bush assembly and plunger cavity rear end interference fit, the plunger lining can float by relative diversion rod with spring collar, and the boss of spring collar and diversion rod is used for limiting mutually unsteady maximum displacement.Therefore the plunger lining that floats can be floated by the axial of fluid and viscous friction driving radially, when the plunger lining can be responded to plunger motion and the axially and radially viscous friction that produces of fluid, being fixed on the bulb that connects the induction feeler lever on the connecting rod with hold-doun nut stretches in the sensing hole of plunger lining and responds to viscous friction, connect connecting rod and be fixed on the friction force sensor by holding screw simultaneously, friction force can be drawn by lead the viscous friction force signal from a plurality of directions from the wire casing of cylinder body.As shown in Figure 1, friction force sensor and connect connecting rod and be fixed on the cylinder body in the mounting groove of offering between two plunger cavities by holding screw, therefore this groove has rationally utilized the useful space between the plunger cavity, guarantees that this test can be done not changing the plunger pump structure to carry out on-line measurement.Fig. 3 is the three-dimensional model assembly drawing of whole measurement structure, has designed the enough connection connecting rods of rigidity and has guaranteed that the power of induction contact induction can be delivered to sensor accurately.And whole syndeton design utilized on two cylinder bodies the fan-shaped gap between two plunger cavities cleverly, makes compact conformation, reliable and stable.In can the useful space of integral installation on cylinder body, the effect after the installation as shown in Figure 1.
Shown in Fig. 5 (a), Fig. 5 (b), can in the plunger cavity of cylinder body, be positioned at RC position in order to guarantee the plunger lining, on the plunger lining, offer a plurality of static pressure support slots, the introducing hydraulic oil can support the plunger lining and be in quick condition.As shown in Figure 4, the fluid that draws from a plurality of different plunger cavities is transferred in each static pressure groove, because the high and low alternate of oil liquid pressure in each plunger cavity, therefore draw fluid from the plunger cavity of a plurality of outs of phase, it is high pressure that assurance has the fluid of a plunger cavity at least, the fluid in high-pressure plunger chamber is introduced in the static pressure support slot of plunger lining by retaining valve again, thereby make the plunger lining force the heart with high-voltage oil liquid, make the plunger lining be in quick condition, impression that can be responsive is from the variation of plunger cavity inner fluid viscous friction.
Claims (5)
1. an apparatus for measuring plunger sub-oil film viscous friction is characterized in that: comprise cylinder body (1), induction feeler lever (2), connect connecting rod (3), sensor wire (5), friction force sensor (6), plunger lining (8), spring collar (9), water conservancy diversion rod member (10) and retaining valve (11); In a plunger cavity of cylinder body (1), by spring collar (9) water conservancy diversion rod member (10) and plunger lining (8) are linked together and to form floating bush assembly by hydrostatic support, wherein water conservancy diversion rod member (10) and plunger cavity interference fit, the relative together water conservancy diversion rod member with spring collar (9) of plunger lining (8) floats, being fixed on the bulb that connects the induction feeler lever (2) on connecting rod (3) one ends with hold-doun nut (7) stretches in the sensing hole of plunger lining (8) and responds to viscous friction, the other end fastened screw of while (4) that connects connecting rod (3) is fixed on the friction force sensor (6), friction force sensor (6) is installed in the mounting groove of offering on the cylinder body (1), draws from a plurality of fluid that the plunger cavity of retaining valve (11) is installed hydraulic oil is supported in the support slot of plunger lining (8).
2. a kind of apparatus for measuring plunger sub-oil film viscous friction according to claim 1 is characterized in that: described cylinder body (1) flow end face outside surface is plane or concave spherical surface.
3. a kind of apparatus for measuring plunger sub-oil film viscous friction according to claim 1, it is characterized in that: described friction force sensor (6) is three-dimensional force, two-dimentional power or a dimensional force sensor, and described induction feeler lever (2) is three-dimensional force, two-dimentional power or one dimension power induction feeler lever.
4. a kind of apparatus for measuring plunger sub-oil film viscous friction according to claim 1 is characterized in that: described plunger lining (8) has a plurality of hydrostatic support windows, and the hydraulic oil of being drawn by the plunger cavity on the cylinder body (1) supports the plunger lining.
5. a kind of apparatus for measuring plunger sub-oil film viscous friction according to claim 1 is characterized in that: the number of the plunger cavity on the described cylinder body is 2～11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101620504A CN101413838B (en) | 2008-11-07 | 2008-11-07 | Apparatus for measuring plunger sub-oil film viscous friction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101620504A CN101413838B (en) | 2008-11-07 | 2008-11-07 | Apparatus for measuring plunger sub-oil film viscous friction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101413838A CN101413838A (en) | 2009-04-22 |
| CN101413838B true CN101413838B (en) | 2010-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101620504A Expired - Fee Related CN101413838B (en) | 2008-11-07 | 2008-11-07 | Apparatus for measuring plunger sub-oil film viscous friction |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104198100B (en) * | 2014-08-04 | 2016-06-01 | 浙江大学 | Adopt the plunger pair friction measurement device that cylinder body rotates |
| CN105181205B (en) * | 2015-09-09 | 2017-07-07 | 浙江大学 | A kind of axial force test device of high-voltage high-speed axial plunger pump plunger pair four |
| CN109900410B (en) * | 2019-04-22 | 2021-01-29 | 兰州理工大学 | Device and method for accurately measuring pollution friction force of slide valve in real time |
| CN111648950B (en) * | 2020-06-11 | 2022-03-22 | 太原理工大学 | Wireless test system for internal pressure of axial plunger pump |
| CN113959611B (en) * | 2021-09-27 | 2022-09-16 | 山东大学 | Double-nut ball screw pair friction moment estimation method |
| CN115615686B (en) * | 2022-12-14 | 2023-03-31 | 浙江大学 | Inner curve hydraulic motor multi-plunger assembly testing device and testing method |
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2008
- 2008-11-07 CN CN2008101620504A patent/CN101413838B/en not_active Expired - Fee Related
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| CN101413838A (en) | 2009-04-22 |
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Granted publication date: 20101215 Termination date: 20121107 |