CN109973460B - Reciprocating seal test cylinder and test bench thereof - Google Patents

Reciprocating seal test cylinder and test bench thereof Download PDF

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Publication number
CN109973460B
CN109973460B CN201910255486.6A CN201910255486A CN109973460B CN 109973460 B CN109973460 B CN 109973460B CN 201910255486 A CN201910255486 A CN 201910255486A CN 109973460 B CN109973460 B CN 109973460B
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China
Prior art keywords
piston rod
cylinder
seal
sealing
test
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CN201910255486.6A
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Chinese (zh)
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CN109973460A (en
Inventor
胡泽华
黄兴
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Guangzhou Mechanical Engineering Research Institute Co ltd
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Guangzhou Mechanical Engineering Research Institute Co ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1447Pistons; Piston to piston rod assemblies
    • F15B15/1452Piston sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1457Piston rods
    • F15B15/1461Piston rod sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/007Simulation or modelling
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point

Abstract

The invention relates to the technical field of sealing test, in particular to a reciprocating sealing test cylinder and a test bed thereof. The invention solves the problem that the reciprocating sealing test bed of the oil cylinder in the prior art can only evaluate one type of sealing element each time, improves the test efficiency, can very intuitively evaluate the sealing performance of each sealing element, and saves the test evaluation cost.

Description

Reciprocating seal test cylinder and test bench thereof
Technical Field
The invention relates to the technical field of sealing tests, in particular to a reciprocating sealing test cylinder and a test bed thereof.
Background
The structure of a test oil cylinder of the existing oil cylinder sealing test bed is shown in fig. 1, a piston rod is driven by a driving cylinder to reciprocate, and the pressure of a tested cylinder is provided by a pressure circulation inlet. Two identical or different oil cylinder sealing elements can be tested each time, and the leaked lubricating oil of the pistons at the two ends is collected by the oil leakage ports respectively, so that the sealing performance of the oil cylinder sealing elements can be evaluated.
The structure of a test oil cylinder of the existing piston rod sealing test bed is shown in fig. 2, a piston rod is driven by a driving cylinder to reciprocate, and the pressure of a tested cylinder is provided by a pressure circulation inlet. The two same or different piston rod sealing elements can be tested at each time, and the leaked lubricating oil of the piston rods at the two ends is collected by the oil leakage openings respectively, so that the sealing performance of the piston rod sealing elements can be evaluated.
In the two sealing element test beds, the oil cylinder can only evaluate one type of sealing element each time, the functions of simultaneously evaluating the oil cylinder sealing and the piston rod sealing cannot be achieved, and the test efficiency is low.
Disclosure of Invention
The invention aims to provide a reciprocating seal test cylinder and a test bed thereof, which can test two types of sealing elements simultaneously and improve the testing and evaluating efficiency of the sealing elements.
In order to achieve the purpose, the invention provides a reciprocating seal test cylinder which comprises a piston rod, a cylinder sleeve sleeved on the piston rod, a connecting sleeve and an end cover, wherein the connecting sleeve is connected with the cylinder sleeve in a sealing manner, the end cover is connected with the connecting sleeve in a sealing manner, an oil cylinder sealing ring is arranged between the cylinder sleeve and the piston rod, a piston rod sealing ring is arranged between the end cover and the piston rod, the piston rod is provided with an oil cylinder seal leakage channel and an oil cylinder seal test groove for arranging the oil cylinder to be tested to be sealed, the connecting sleeve is provided with an oil cylinder oil inlet channel and a piston rod seal test hole for arranging the piston rod to be tested to be sealed, the end cover is provided with a piston rod seal leakage channel, and the oil cylinder oil inlet channel is respectively communicated with.
Optionally, the oil cylinder sealing test grooves, the oil cylinder sealing leakage channel, the piston rod sealing test hole and the piston rod sealing leakage channel are symmetrically arranged on two sides of the oil cylinder sealing ring, the piston rod is provided with a pressure oil channel, and the oil cylinder sealing test grooves on two sides of the oil cylinder sealing ring are communicated through the pressure oil channel.
Optionally, the connecting sleeve is connected with the cylinder sleeve in a locating manner through a spigot, and first static sealing rings are arranged at two ends of the cylinder sleeve and are connected with the connecting sleeve in a sealing manner.
Optionally, a piston rod seal mounting sleeve sleeved on the piston rod is arranged in the piston rod seal test hole, two sides of the piston rod seal mounting sleeve are connected with the piston rod seal test hole in a seal mode through a second static seal ring, and a piston seal test groove used for setting the piston rod seal to be tested is formed in the inner side wall of the piston rod seal mounting sleeve.
Optionally, the connecting sleeve is connected with the end cover through a spigot in a positioning manner, and the piston rod sealing installation sleeve is axially positioned through a convex spigot of the end cover.
Optionally, an oil cylinder guide ring is arranged between the piston rod and the cylinder sleeve.
The invention also provides a reciprocating sealing test bed which comprises a base, a driving cylinder and a test cylinder, wherein the driving cylinder and the test cylinder are arranged on the base, and the output end of the driving cylinder is connected with the piston rod through a shaft connecting piece.
The embodiment of the invention has the following technical effects:
when the test is carried out, the tested oil cylinder seal and the piston rod seal are arranged in the oil cylinder seal test groove and the piston rod seal test hole, the same oil inlet channel of the oil cylinder is utilized, the test and evaluation of two types of sealing elements (the oil cylinder seal and the piston rod seal) can be simultaneously realized, and the leakage amount of the tested sealing element can be effectively measured through the corresponding oil cylinder seal leakage channel and the corresponding piston rod seal leakage channel, so that the test and evaluation efficiency of the tested sealing element is greatly improved, and the test and evaluation cost is saved.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration for testing cylinder seals;
FIG. 2 is a schematic diagram of a prior art configuration for testing piston rod seals;
FIG. 3 is a front view of the preferred embodiment of the present invention;
FIG. 4 is a top view of a preferred embodiment of the present invention;
fig. 5 is a sectional view of a test cylinder according to a preferred embodiment of the present invention.
Description of reference numerals:
1. the device comprises a piston rod, 2, an oil cylinder sealing leakage channel, 3, an end cover, 4, a connecting sleeve, 5, a piston rod sealing installation sleeve, 6, a first static sealing ring, 7, an oil cylinder guide ring, 8, a pressure oil channel, 9, a cylinder sleeve, 10, an oil cylinder oil inlet channel, 11, a second static sealing ring, 12, a piston rod sealing leakage channel, 13, a tested piston rod, 14, a tested oil cylinder, 15, an oil cylinder sealing ring, 16 and a piston rod sealing ring;
17. base 18, driving cylinder 19, shaft connecting piece.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 5, the embodiment provides a reciprocating seal test cylinder, which includes a piston rod 1, a cylinder sleeve 9 sleeved on the piston rod 1, a connecting sleeve 4 and an end cover 3, the connecting sleeve 4 is connected with the cylinder sleeve 9 in a sealing manner, the end cover 3 is connected with the connecting sleeve 4 in a sealing manner, a cylinder sealing ring 15 is arranged between the cylinder sleeve 9 and the piston rod 1, a piston rod sealing ring 16 is arranged between the end cover 3 and the piston rod 1, the piston rod 1 is provided with a cylinder seal leakage channel 2 and a cylinder seal test groove for setting a tested cylinder seal 14, the connecting sleeve 4 is provided with a cylinder oil inlet channel 10 and a piston rod seal test hole for setting a tested piston rod seal 13, the end cover 3 is provided with a piston rod seal leakage channel 12, the cylinder oil inlet channel 10 is respectively, the piston rod seals the test bore and the piston rod seals the leak path 12. When the test is carried out, the tested oil cylinder seal 14 and the piston rod seal are arranged in the oil cylinder seal test groove and the piston rod seal test hole, the same oil cylinder oil inlet channel 10 is utilized, two types of sealing elements (oil cylinder seal and piston rod seal) can be tested and evaluated at the same time, and the leakage amount of the tested sealing element can be effectively measured through the corresponding oil cylinder seal leakage channel 2 and the corresponding piston rod seal leakage channel 12 by the arranged oil cylinder seal and the arranged piston rod seal, so that the test evaluation efficiency of the tested sealing element is greatly improved, and the test evaluation cost is saved.
Further, 15 bilateral symmetry of oil cylinder sealing washer has arranged the sealed test groove of oil cylinder, the sealed leak passage 2 of oil cylinder, the sealed test hole of piston rod and the sealed leak passage 12 of piston rod, pressure oil passageway 8 has been seted up to piston rod 1, the sealed test groove of oil cylinder sealing washer 15 both sides passes through pressure oil passageway 8 intercommunication, realize two types of sealing members of simultaneous measurement, every type of sealing member can test two simultaneously, further improve the efficiency of test, and the sealed test groove of oil cylinder sealing washer 15 both sides and the sealed test hole of piston rod pass through pressure oil passageway 8 intercommunication, utilize same oil cylinder oil feed passageway 10 oil feed, make the sealed test hole of oil cylinder sealing washer 15 both sides of oil cylinder and piston rod set up oil cylinder seal and piston rod seal in the sealed test hole of oil cylinder seal and test under same oil pressure, make things convenient for the direct contrast of.
The connecting sleeve 4 is connected with the cylinder sleeve 9 in a positioning mode through a spigot, and the two ends of the cylinder sleeve 9 are provided with first static sealing rings 6 which are connected with the connecting sleeve 4 in a sealing mode; a piston rod seal mounting sleeve 5 sleeved on the piston rod 1 is arranged in the piston rod seal test hole, two sides of the piston rod seal mounting sleeve 5 are in seal connection with the piston rod seal test hole through a second static seal ring 11, and a piston seal test groove used for arranging a tested piston rod seal 13 is formed in the inner side wall of the piston rod seal mounting sleeve 5; the connecting sleeve 4 is connected with the end cover 3 through a spigot in a positioning manner, and the piston rod seal mounting sleeve 5 is axially positioned through a convex spigot of the end cover 3; the oil cylinder sealing test groove and the piston rod sealing test groove form a relatively sealed test environment, unnecessary pressure loss is avoided, and test accuracy is improved.
An oil cylinder guide ring 7 is arranged between the piston rod 1 and the cylinder sleeve 9, so that the piston rod 1 is prevented from being in direct contact and friction with the cylinder sleeve 9 in the moving process, and the effect of protecting the cylinder sleeve 9 and the piston rod 1 from being damaged is achieved.
Referring to fig. 3 to 5, the present embodiment further provides a reciprocating sealing test bed, which includes a base 17, and a driving cylinder 18 and a testing cylinder disposed on the base 17, wherein an output end of the driving cylinder 18 is connected to the piston rod 1 through a shaft connector 19.
The working principle of the invention is as follows:
pressure oil is introduced into the oil inlet channel 10 of the oil cylinder, the piston rod 1 reciprocates under the action of the driving cylinder 18, so that the tested oil cylinder seal 14 and the cylinder sleeve 9 are driven to rub with each other, the tested oil cylinder seal 14 enables all leaked pressure oil to flow out through the oil cylinder seal leakage channel 2 under the action of the pressure oil after leakage occurs, and the sealing performance of the tested oil cylinder seal 14 is evaluated according to the pressure oil amount flowing out of the oil cylinder seal leakage channel 2;
similarly, for tested piston rod seal 13, under the action of driving cylinder 18, piston rod 1 reciprocates, thereby driving tested piston rod seal 13 and piston rod 1 to rub each other, tested piston rod seal 13 is under the effect of pressure oil, after the leakage appears, because the effect of piston rod sealing washer 16, make the pressure oil of leakage all pass through the piston rod 1 and the clearance of piston rod seal installation cover 5 and end cover 3, flow from piston rod seal leakage path 12 and flow out, thereby can evaluate the sealing performance of tested piston rod seal 13.
In conclusion, the invention solves the problem that the reciprocating sealing test bed of the oil cylinder in the prior art can only evaluate one type of sealing element each time, improves the test efficiency, can very intuitively evaluate the sealing performance of each sealing element and saves the test evaluation cost.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (6)

1. A reciprocating seal test cylinder is characterized by comprising a piston rod, a cylinder sleeve sleeved on the piston rod, a connecting sleeve and an end cover, wherein the connecting sleeve is connected with the cylinder sleeve in a sealing manner, the end cover is connected with the connecting sleeve in a sealing manner, an oil cylinder sealing ring is arranged between the cylinder sleeve and the piston rod, a piston rod sealing ring is arranged between the end cover and the piston rod, the piston rod is provided with an oil cylinder seal leakage channel and an oil cylinder seal test groove for setting a seal of a tested oil cylinder, the connecting sleeve is provided with an oil cylinder oil inlet channel and a piston rod seal test hole for setting a seal of the tested piston rod, the end cover is provided with a piston rod seal leakage channel, and the oil cylinder oil inlet channel is respectively communicated with the oil cylinder seal test groove, the;
the oil cylinder sealing test device is characterized in that the two sides of the oil cylinder sealing ring are symmetrically provided with the oil cylinder sealing test groove, the oil cylinder sealing leakage channel, the piston rod sealing test hole and the piston rod sealing leakage channel, the piston rod is provided with a pressure oil channel, and the oil cylinder sealing test grooves on the two sides of the oil cylinder sealing ring are communicated through the pressure oil channel.
2. The reciprocating seal testing cylinder as defined in claim 1, wherein said connecting sleeve is connected to the cylinder sleeve by means of a spigot, and first stationary seal rings are provided at both ends of the cylinder sleeve to be connected to the connecting sleeve in a sealing manner.
3. The reciprocating seal testing cylinder according to claim 1, wherein a piston rod seal mounting sleeve sleeved on the piston rod is arranged in the piston rod seal testing hole, two sides of the piston rod seal mounting sleeve are connected with the piston rod seal testing hole in a sealing manner through a second static seal ring, and a piston seal testing groove used for arranging a piston rod to be tested to be sealed is formed in the inner side wall of the piston rod seal mounting sleeve.
4. The reciprocating seal testing cylinder of claim 3, wherein the connecting sleeve is connected with the end cover through a spigot in a locating manner, and the piston rod seal mounting sleeve is axially located through a male spigot of the end cover.
5. The reciprocating seal testing cylinder of claim 1, wherein a cylinder guide ring is disposed between the piston rod and the cylinder liner.
6. A reciprocating seal test bed is characterized by comprising a base, a driving cylinder arranged on the base and a test cylinder according to any one of claims 1 to 5, wherein the output end of the driving cylinder is connected with a piston rod through a shaft connecting piece.
CN201910255486.6A 2019-04-01 2019-04-01 Reciprocating seal test cylinder and test bench thereof Active CN109973460B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910255486.6A CN109973460B (en) 2019-04-01 2019-04-01 Reciprocating seal test cylinder and test bench thereof

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Application Number Priority Date Filing Date Title
CN201910255486.6A CN109973460B (en) 2019-04-01 2019-04-01 Reciprocating seal test cylinder and test bench thereof

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CN109973460B true CN109973460B (en) 2020-08-04

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JPH10196802A (en) * 1997-01-14 1998-07-31 Mitsubishi Heavy Ind Ltd Cylinder device
CN2886536Y (en) * 2005-12-19 2007-04-04 中国神华能源股份有限公司 Dynamic testing platform for hydraulic cylinder seal performance
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CN203404162U (en) * 2013-08-13 2014-01-22 湖南特力液压有限公司 Test device for testing durability of sealing element of piston of oil cylinder and test equipment
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