CN110044532B - Reciprocating sealing experiment cylinder body structure capable of measuring friction force of single sealing ring - Google Patents
Reciprocating sealing experiment cylinder body structure capable of measuring friction force of single sealing ring Download PDFInfo
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- CN110044532B CN110044532B CN201910320493.XA CN201910320493A CN110044532B CN 110044532 B CN110044532 B CN 110044532B CN 201910320493 A CN201910320493 A CN 201910320493A CN 110044532 B CN110044532 B CN 110044532B
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- 238000007789 sealing Methods 0.000 title claims abstract description 94
- 238000002474 experimental method Methods 0.000 title claims abstract description 25
- 230000003068 static effect Effects 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- G01L5/0028—Force sensors associated with force applying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a reciprocating seal experiment cylinder body structure capable of measuring the friction force of a single sealing ring, which comprises an experiment cylinder body and an auxiliary measuring device, wherein the experiment cylinder body is fixed on a workbench, high-pressure oil is provided in a cavity through an external hydraulic system, and a piston rod is driven to do reciprocating linear motion through a reciprocating linear driving device; only one side of the experimental cylinder body is provided with a reciprocating seal ring, the other side of the experimental cylinder body is fixedly connected with an auxiliary measuring device through a force sensor, the auxiliary measuring device realizes the sealing effect through a static seal and a reciprocating seal piece, the stress of which is basically unchanged in the motion process of a piston rod, and the friction force of the seal ring can be measured; the experimental cylinder body can measure the friction force of the inner stroke and the outer stroke of a single sealing ring respectively.
Description
Technical Field
The invention belongs to the technical field of rubber and plastic reciprocating sealing, and particularly relates to a reciprocating sealing experiment cylinder body structure capable of measuring the friction force of a single sealing ring.
Background
The reciprocating seal is a dynamic seal which makes reciprocating motion between sealing interfaces, is a key core part for ensuring normal work of systems such as hydraulic pressure, air pressure and the like, has good and bad performance which affects the stability and safety of equipment, and plays a very important role in modern industries such as aerospace, machinery, automobiles and the like. In recent years, along with the improvement of the overall performance of the main machine equipment, the requirements on the long service life and the high reliability of the sealing element are continuously improved, so that the method has important practical significance for developing more systematic and deep research on the reciprocating sealing.
The reciprocating sealing technology seems simple, and is a fundamental technology with strong comprehensiveness of multiple subjects such as materials science, mechanics, tribology, heat transfer science and the like. For reciprocating sealing, the leakage rate and the friction force are two most important indexes for evaluating the performance of the reciprocating sealing. According to the existing theory, a layer of oil film is attached to the surface of a rod during reciprocating sealing operation, hydraulic oil leaks out during an outer stroke, and certain hydraulic oil is pumped back during an inner stroke, so that the pumping back capacity of the inner stroke is larger than the leakage amount of the outer stroke by designing an asymmetric sealing ring structure, and zero leakage is realized. The friction force of the inner stroke and the friction force of the outer stroke are different, and how to measure the friction force of the two strokes respectively by an experimental method has great significance for the research of the reciprocating seal.
However, this is not easy to achieve because the two ends of the general experimental cylinder body need to be sealed by sealing rings to seal the fluid in the cavity, so that the measured friction force is always the sum of the friction force of the inner stroke and the outer stroke during measurement, and the friction force of the inner stroke and the outer stroke cannot be measured independently.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a reciprocating seal experimental cylinder structure capable of measuring the friction force of a single seal ring, which can distinguish the friction force of the inner stroke and the outer stroke of the reciprocating seal ring to be measured separately.
In order to achieve the purpose, the invention adopts the technical scheme that:
the reciprocating sealing experiment cylinder body structure capable of measuring friction force of single sealing ring comprises an experiment cylinder body and an auxiliary measuring device, wherein the experiment cylinder body is horizontally placed, a cylinder barrel 5 of the experiment cylinder body is fixed on a workbench 1, a left side cylinder base 3 and a right side cylinder base 9 are fixed on two sides of the cylinder barrel 5, a left side cover plate 2 is fixed on the left side of the left side cylinder base 3, a first sealing element mounting bush 4 is arranged between the left side cover plate 2 and the left side cylinder base 3, a right side cover plate 10 is fixed on the right side of the right side cylinder base 9, a second auxiliary measuring disc 8 is fixed on the left side of the right side cylinder base 9 through a force sensor 12, a first auxiliary measuring disc 6 is fixed on the left side of a second auxiliary measuring disc 8, a second sealing element mounting bush 7 is arranged between the second auxiliary measuring disc 8 and the first auxiliary measuring disc 6, a piston rod 21 horizontally penetrates into the cylinder barrel 5 and penetrates, The device comprises a left side cylinder base 3, a first auxiliary measuring disc 6, a second sealing element mounting bush 7, a second auxiliary measuring disc 8, a right side cylinder base 9 and a right side cover plate 10, wherein the left side of a piston rod 21 is connected with a reciprocating linear driving device, an oil inlet hole 16 is formed in the side wall of a cylinder barrel 5, a reciprocating sealing element 19 is arranged between the first sealing element mounting bush 4 and the piston rod 21, a first static sealing element 18 is arranged between the first sealing element mounting bush 4 and the left side cylinder base 3, a sealing element 15 to be measured is arranged between the second sealing element mounting bush 7 and the piston rod 21, a third static sealing element 14 is arranged between the second sealing element mounting bush 7 and the second auxiliary measuring disc 8, a second static sealing element 17 is arranged between the left side cylinder base 3 and the inner wall of the cylinder barrel 5, and a fourth static sealing element 13 is arranged between the second auxiliary measuring disc 8 and.
The inner diameter of the left side cover plate 2 is provided with a left side guide ring 20, and the inner diameter of the right side cover plate 10 is provided with a right side guide ring 11.
The left side cylinder base 3 and the cylinder barrel 5, the right side cylinder base 9 and the cylinder barrel 5, the left side cover plate 2 and the left side cylinder base 3, the right side cover plate 10 and the right side cylinder base 9, and the first auxiliary measuring disc 6 and the second auxiliary measuring disc 8 are connected through nuts, but not limited to nuts.
The left side central part of left side cylinder base 3 is sunken, and the right side central part of left side apron 2 is evagination, and first sealing member installation bush 4 is located this sunken department, is withstood by the evagination of left side apron 2, first static sealing member 18 encircles and sets up between the inside wall of this sunken department and the lateral wall of first sealing member installation bush 4.
The central part of the left side surface of the second auxiliary measuring disc 8 is concave, the central part of the right side surface of the first auxiliary measuring disc 6 is convex, the second sealing element mounting bush 7 is positioned at the concave part and is propped against the convex part of the first auxiliary measuring disc 6, and the third static sealing element 14 is arranged between the inner side wall of the concave part and the outer side wall of the second sealing element mounting bush 7 in a surrounding manner.
The invention seals two sides by two separated devices, the two devices are fixedly connected by the force sensor 12, and the sealing between the two devices is realized by a static seal with acting force hardly changed in the moving process of the piston rod 21, thereby realizing the separate measurement of the internal and external friction forces of a single sealing ring.
The invention adds an auxiliary measuring device on the basis of the conventional reciprocating seal experiment cylinder body, the auxiliary measuring device can bear the sealing effect of one side and is connected with the experiment cylinder body through a force sensor with higher rigidity, so that the friction force to the sealing ring only causes the tiny displacement of the auxiliary measuring device when the piston rod reciprocates, the acting force change of the static seal to the auxiliary measuring device can be ignored at the moment, and the force sensor can measure the friction force change of a single reciprocating sealing ring.
Compared with the existing reciprocating sealing experiment table, the invention can independently measure the friction force of the inner stroke and the outer stroke of a single sealing ring.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an enlarged view of the right side of the test cylinder.
Fig. 3 is an enlarged view of the left side of the experimental cylinder.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
As shown in FIG. 1, FIG. 2 and FIG. 3, a reciprocating sealing experimental cylinder structure capable of measuring the friction force of a single sealing ring comprises an experimental cylinder and an auxiliary measuring device.
The experiment cylinder body is horizontally laid, a cylinder barrel 5 of the experiment cylinder body is fixed on a workbench 1, a left side cylinder base 3 and a right side cylinder base 9 are fixed on two sides of the cylinder barrel 5, a left side cover plate 2 is fixed on the left side of the left side cylinder base 3, a left side guide ring 20 is installed at the inner diameter of the left side cover plate 2, the central part of the left side surface of the left side cylinder base 3 is concave, the central part of the right side surface of the left side cover plate 2 protrudes outwards, and a first sealing element installation bushing 4 is located at the concave part and is propped against the protruding part of the left.
The first auxiliary measuring disc 6 is fixed on the left side of the second auxiliary measuring disc 8, the central part of the left side surface of the second auxiliary measuring disc 8 is concave, the central part of the right side surface of the first auxiliary measuring disc 6 is convex, and the second sealing element mounting bush 7 is positioned on the concave part and is propped against the convex part of the first auxiliary measuring disc 6.
A piston rod 21 horizontally penetrates into a cylinder barrel 5 and penetrates through a left side cover plate 2, a first sealing element mounting bush 4, a left side cylinder base 3, a first auxiliary measuring disc 6, a second sealing element mounting bush 7, a second auxiliary measuring disc 8, a right side cylinder base 9 and a right side cover plate 10, the left side of the piston rod 21 is connected with a reciprocating linear driving device, an oil inlet hole 16 is formed in the side wall of the cylinder barrel 5, a reciprocating sealing element 19 is arranged between the first sealing element mounting bush 4 and the piston rod 21, and a first static sealing element 18 is arranged between the inner side wall of a lower recess of the left side cylinder base 3 and the outer side wall of the first sealing element mounting bush 4 in a surrounding mode.
The sealing element 15 to be measured is arranged between the second sealing element mounting bush 7 and the piston rod 21, a third static sealing element 14 is arranged between the inner side wall of the lower recess of the second auxiliary measuring disc 8 and the outer side wall of the second sealing element mounting bush 7 in a surrounding mode, a second static sealing element 17 is arranged between the left side cylinder base 3 and the inner wall of the cylinder barrel 5, and a fourth static sealing element 13 is arranged between the second auxiliary measuring disc 8 and the inner wall of the cylinder barrel 5.
The left side cylinder base 3 and the cylinder barrel 5, the right side cylinder base 9 and the cylinder barrel 5, the left side cover plate 2 and the left side cylinder base 3, the right side cover plate 10 and the right side cylinder base 9, and the first auxiliary measuring disc 6 and the second auxiliary measuring disc 8 are connected through nuts, but not limited to nuts.
The first auxiliary measuring disc 6, the second auxiliary measuring disc 8 and the force sensor 12 described above constitute the main parts of the auxiliary measuring device.
The working principle of the invention is as follows: in the experiment process, an external hydraulic system supplies oil to the experiment cylinder body through the oil inlet hole 16, and after the cavity is filled with oil with certain pressure, the reciprocating linear driving device is used for driving the piston rod 21 to reciprocate. Before measuring the friction force, zero marking of the force sensor 12 is carried out, the rotating speed of the motor is the lowest, the piston rod 21 is driven to move slowly, and the stable value of the inner stroke friction force and the outer stroke friction force is recorded. And (5) beginning a formal experiment after zero marking to obtain the friction force data with directional property.
In conclusion, the high-pressure oil is provided for the cavity through the external hydraulic system, and the piston rod is driven to do reciprocating linear motion through the reciprocating linear driving device; only one side of the experimental cylinder body is provided with a reciprocating sealing ring, the other side of the experimental cylinder body is fixedly connected with an auxiliary measuring device through a force sensor, the auxiliary measuring device realizes the sealing effect through a static seal and a reciprocating sealing piece, the stress of the static seal and the stress of the reciprocating sealing piece are basically unchanged in the motion process of a piston rod, and meanwhile, the friction force of the sealing ring can be measured, and the friction force of the inner stroke and the outer stroke of a single sealing ring.
Claims (3)
1. A reciprocating sealing experiment cylinder body structure capable of measuring friction force of a single sealing ring comprises an experiment cylinder body and an auxiliary measuring device, and is characterized in that the experiment cylinder body is horizontally placed horizontally, a cylinder barrel (5) of the experiment cylinder body is fixed on a workbench (1), a left side cylinder base (3) and a right side cylinder base (9) are fixed on two sides of the cylinder barrel (5), a left side cover plate (2) is fixed on the left side of the left side cylinder base (3), a first sealing element mounting bush (4) is arranged between the left side cover plate (2) and the left side cylinder base (3), a right side cover plate (10) is fixed on the right side of the right side cylinder base (9), a second auxiliary measuring disc (8) is fixed on the left side of the right side cylinder base (9) through a force sensor (12), a first auxiliary measuring disc (6) is fixed on the left side of the second auxiliary measuring disc (8), a second sealing element mounting bush (7) is arranged between the second auxiliary measuring disc (8) and the first auxiliary measuring disc, a piston rod (21) horizontally penetrates into the cylinder barrel (5) and penetrates through the left side cover plate (2), the first sealing element mounting bush (4), the left side cylinder base (3), the first auxiliary measuring disc (6), the second sealing element mounting bush (7), the second auxiliary measuring disc (8), the right side cylinder base (9) and the right side cover plate (10), the left side of the piston rod (21) is connected with a reciprocating linear driving device, an oil inlet hole (16) is formed in the side wall of the cylinder barrel (5), a reciprocating sealing element (19) is arranged between the first sealing element mounting bush (4) and the piston rod (21), a first static sealing element (18) is arranged between the first sealing element mounting bush (4) and the left side cylinder base (3), a sealing element (15) to be tested is arranged between the second sealing element mounting bush (7) and the piston rod (21), a third static sealing element (14) is arranged between the second sealing element mounting bush (7) and the second auxiliary measuring disc (8), a second static sealing element (17) is arranged between the left side cylinder base (3) and the inner wall of the cylinder barrel (5), a fourth static sealing element (13) is arranged between the second auxiliary measuring disc (8) and the inner wall of the cylinder barrel (5), wherein the central part of the left side surface of the left side cylinder base (3) is concave, the central part of the right side surface of the left side cover plate (2) is convex, the first sealing element mounting bush (4) is positioned at the concave part and is propped against the convex part of the left side cover plate (2), and the first static sealing element (18) is arranged between the inner side wall of the concave part and the outer side wall of the first sealing element mounting bush (4) in a surrounding manner; the central part of the left side surface of the second auxiliary measuring disc (8) is concave, the central part of the right side surface of the first auxiliary measuring disc (6) is convex, the second sealing element mounting bush (7) is positioned at the concave part and is propped against the convex part of the first auxiliary measuring disc (6), and the third static sealing element (14) is arranged between the inner side wall of the concave part and the outer side wall of the second sealing element mounting bush (7) in a surrounding manner.
2. The structure of the reciprocating sealing experiment cylinder body capable of measuring the friction force of the single sealing ring according to the claim 1, is characterized in that a left guide ring (20) is installed at the inner diameter of the left side cover plate (2), and a right guide ring (11) is installed at the inner diameter of the right side cover plate (10).
3. The reciprocating seal experiment cylinder body structure capable of measuring the friction force of a single sealing ring according to claim 1, wherein the left side cylinder base (3) and the cylinder barrel (5), the right side cylinder base (9) and the cylinder barrel (5), the left side cover plate (2) and the left side cylinder base (3), the right side cover plate (10) and the right side cylinder base (9), and the first auxiliary measuring disc (6) and the second auxiliary measuring disc (8) are connected through nuts.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910320493.XA CN110044532B (en) | 2019-04-20 | 2019-04-20 | Reciprocating sealing experiment cylinder body structure capable of measuring friction force of single sealing ring |
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| CN201910320493.XA CN110044532B (en) | 2019-04-20 | 2019-04-20 | Reciprocating sealing experiment cylinder body structure capable of measuring friction force of single sealing ring |
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| CN110044532B true CN110044532B (en) | 2020-04-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110514338B (en) * | 2019-09-05 | 2020-09-15 | 清华大学 | High-pressure high-speed reciprocating sealing experiment test platform with floating cylinder body |
| CN110836848B (en) * | 2019-11-15 | 2021-12-14 | 眉山中车制动科技股份有限公司 | Method for detecting friction force of O-shaped sealing ring |
| CN110793709B (en) * | 2019-12-04 | 2021-07-23 | 四川南格尔生物科技有限公司 | Pressure monitoring device |
| CN112683522A (en) * | 2020-11-18 | 2021-04-20 | 南京航空航天大学 | Device and method for measuring friction force of sealing ring under given pressure |
| CN114199552B (en) * | 2021-12-14 | 2023-03-31 | 浙江大学 | Device and method for testing reciprocating motion friction force and assembly force of sealing ring |
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| CN104535243A (en) * | 2015-01-08 | 2015-04-22 | 清华大学 | Reciprocating seal experiment table for measuring friction feature of single seal ring |
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| CN102175389B (en) * | 2011-02-21 | 2012-12-05 | 吉林大学 | Rolling friction piston pressure gauge |
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| CN104568275B (en) * | 2015-01-22 | 2017-06-13 | 大连海事大学 | The test device and method of a kind of cylinder sleeve and piston component frictional force |
| DE102015109332B3 (en) * | 2015-06-11 | 2016-12-15 | Gottfried Wilhelm Leibniz Universität Hannover | Device and method for friction force measurement |
| CN106092410A (en) * | 2016-06-16 | 2016-11-09 | 大连海事大学 | The online testing device of cylinder sleeve and piston component frictional force and method of testing |
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Patent Citations (3)
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| CN102080514A (en) * | 2010-12-21 | 2011-06-01 | 中国石油天然气集团公司 | Mechanical parameter measuring device of underground compression type packer and using method thereof |
| CN103698072A (en) * | 2013-12-24 | 2014-04-02 | 潍柴动力股份有限公司 | Friction measuring system and fraction measuring device |
| CN104535243A (en) * | 2015-01-08 | 2015-04-22 | 清华大学 | Reciprocating seal experiment table for measuring friction feature of single seal ring |
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