SU1682648A1 - Method of measuring of rate of leakage of working fluid over piston and rod of hydraulic cylinder and device for performing such measurements - Google Patents

Method of measuring of rate of leakage of working fluid over piston and rod of hydraulic cylinder and device for performing such measurements Download PDF

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Publication number
SU1682648A1
SU1682648A1 SU884417016A SU4417016A SU1682648A1 SU 1682648 A1 SU1682648 A1 SU 1682648A1 SU 884417016 A SU884417016 A SU 884417016A SU 4417016 A SU4417016 A SU 4417016A SU 1682648 A1 SU1682648 A1 SU 1682648A1
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SU
USSR - Soviet Union
Prior art keywords
piston
measuring
rod
leakage
cylinder
Prior art date
Application number
SU884417016A
Other languages
Russian (ru)
Inventor
Георгий Михайлович Георгиевский
Ирена Леонидовна Георгиевская
Original Assignee
Подмосковный Филиал Государственного Союзного Научно-Исследовательского Тракторного Института Нати
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Подмосковный Филиал Государственного Союзного Научно-Исследовательского Тракторного Института Нати filed Critical Подмосковный Филиал Государственного Союзного Научно-Исследовательского Тракторного Института Нати
Priority to SU884417016A priority Critical patent/SU1682648A1/en
Application granted granted Critical
Publication of SU1682648A1 publication Critical patent/SU1682648A1/en

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Abstract

The invention can be used in testing and monitoring seals for hydraulic cylinders under load. The purpose of the -0 0-P 15 of the invention is to improve the accuracy of measuring leaks during the reciprocating movement of the hydraulic cylinder rod. A device for measuring leakage of working fluid through the piston and rod of a hydraulic cylinder contains test 1 and loading 2 hydraulic cylinders interconnected by rods using carriage 3, pumping station 4 with hydraulic system for controlling the movement of the rod of the loading hydraulic cylinder 2, a device for measuring leaks in the form of measuring tanks 10 and 11 , each of which is equipped with a graduated tube 12, made with a capillary section and mounted on the conical cap of each measuring tank 10 and 11, and the volume of each of them does not exceed the volume m corresponding to the cavity of the test hydroo 00 y Ј 00

Description

cylinder 1, hydrodistributing equipment in the form of a block that includes parallel adjustable throttle 13, check valve 14 and pressure gauge 15 in lines connecting measuring vessels 10 and 11 with the corresponding piston 16 and rod 17 cavities of the tested hydraulic cylinder 1, level gauge 18 on graduated tube 12, limit switches 20. According to the difference in levels in the graduated tubes 12, after each of the three strokes of the piston 19, the magnitude of the leakage through the rod and the piston is evaluated independently. 2 sec. and 1 hp f-ly, 1 silt,

The invention relates to hydraulic engineering and can be used for testing and monitoring the state of hydraulic cylinder seals under load.

The aim of the invention is to improve the accuracy of measuring leaks during reciprocating movement of the hydraulic cylinder rod.

The drawing shows a schematic diagram of a device for measuring leakage of working fluid through the piston and rod of a hydraulic cylinder.

A device for measuring the leakage of working fluid through the piston and cylinder rod contains test 1 and loading 2 hydraulic cylinders connected to each other by means of carriage 3 and pivotally fixed by cylinders on supports, pump station 4 with hydraulic control system of rod movement of the loading hydraulic cylinder 2 in the form of a hydraulic distributor 5 and drain lines containing adjustable throttles 6, overflow valve 7, pressure gauge 8 and communicated with the cavities of the load cylinder 2 and the tank 9, the device for measuring Measuring tanks in the form of measuring tanks 10 and 11, each of which is equipped with a graduated tube 12, made with a capillary section and installed on the conical lid of each measuring tank 10 and 11, and the volume of each of them does not exceed the volume of the corresponding working cavity of the tested hydraulic cylinder 1, the hydraulic distribution an apparatus in the form of a block including a parallel-installed adjustable choke 13, a check valve 14 and a pressure gauge 15 in the lines connecting the measuring tanks 10 and 11 with the corresponding piston 16 and rod 17 cavities will be tested hydraulic cylinder 1. On each graduated tube 12, a level gauge 18 can be installed. The extreme positions of the piston 19 stroke of the rod of the tested hydraulic cylinder 1 under the action of the hydraulic cylinder 12 are controlled by limit switches 20 mounted in the path of the carriage 3. The hydraulic distributor 5 can be controlled from the limit valves switches 20.

The method is carried out as follows.

By means of the hydraulic control system for the movement of the load cylinder 2, set the desired speed

the movement of the rods and at the same time select the load pressure by adjusting the throttles 13 in the corresponding cavities 16 and 17 of the hydraulic cylinder under test 1. The level of the charged working fluid in the measuring tanks

10 and 11 are installed either by topping up or casting so that in the extreme position of the piston 19 of the hydraulic cylinder 1 being tested, the liquid level is in the graduated tube 12 in the upper position, to which the level gauge 18 is adjusted, i.e. in the measuring tank 10 with the rod fully retracted and in the measuring tank 11 with the rod of the hydraulic cylinder 1 fully extended.

Leakage measurements start at extreme

the position of the piston 19c fully extended by the rod of the test cylinder 1. Measure the level of fluid gpsh in the graduated tube 12 of the measuring tank 11

the rod end 17 of the hydraulic cylinder 1 by means of a level gauge 18. A full stroke of the piston 19 is produced under the action of the rod of the load hydraulic cylinder 2 at a predetermined speed and back pressure in the piston cavity 16. At the same time, the amount of liquid flows into the rod cavity 17 from the piston cavity 16 in the form of leaks equal to D Vn. Measure the level of liquid bin in the graduated tube 12

the measuring tank 10 of the piston cavity 16. Switch the injection cavities in the load cylinder 2 and make the full stroke of the piston 19 to displace the liquid under pressure from the rod cavity 17 of the test cylinder 1. After the end of the stroke, measure the level of the liquid П2ш in the graduated tube of the 12 gauge tank again

. The resulting level difference

gpsh - P2sh Abu, is the absolute value of fluid leaks on the rod, as when the rod is extended into the piston cavity 16, leaks flowed in the form of a fluid amount equal to AVn, while in the piston cavity - D Vn + A Vn 0, and simultaneously leaked out on the rod D / sh, i.e. the difference Δ corresponds to the leakage of the stem D Us: D Vn - (AVn + A Vui) - A Vui.

By changing the direction of movement of the rod of the loading cylinder 2, the third one is made, i.e. repeat the first (odd), the piston stroke 19 of the test cylinder 1 with the displacement under pressure of fluid from the piston cavity 16, while in the bayonet cavity 17 along the piston 19 flows in the form of leaks the amount of fluid equal to A Vn. Given the previously made two moves, positive and negative leaks on the piston receive

- AVn + AVn-AVn -AVn, i.e. the difference between the levels hin after the second stroke and h2n after the third stroke corresponds to the amount of leakage along the piston

gnp - h2n ahn.

If the duration of the test and to produce the nth number of paired strokes of the piston 19, then the difference in the levels between the previous and the given odd stroke is obtained at every odd stroke when comparing the fluid levels between the previous and this odd stroke, the leakage rate for the piston 19 is even the rod is determined by the difference in fluid levels between the initial level of Hz in the measuring tank 11 of the rod end 17 before the first stroke and the level of the fluid Ipsh after the n-th order of the even stroke divided by the halved number of pair moves G11sh ppsh

AVm (n)

p / 2

where n is 2,4,6, ... is the odd even number of the turn.

Claims (3)

  1. Thus, the method provides an increase in the accuracy of leakage measurement on the piston and cylinder rod with a constant movement of the piston under load. Claim 1. Method for measuring working fluid leakage through piston and cylinder rod, which consists in loading the rod with an external force and measuring the displaced volume of fluid from the cavities using
    dimensional containers, characterized in that.
    that, in order to improve the accuracy of leakage measurement during the reciprocating movement of the rod, the piston with retracted stem is set to the extreme position and the volume of fluid in the measuring capacity of the piston cavity is measured, then the piston is transferred to the other extreme position with the extended stem and without load change the level of the liquid in the measuring capacity of the rod cavity, produce at least three full strokes of the piston with throttling the fluid displaced from the cavities into the corresponding measuring capacity and measure the liquid levels in the measuring container stock. the cavity after the second stroke and the piston cavity after the third stroke, while the parameters of the leaks are determined as the difference between the levels of the displaced fluid.
  2. 2, The method according to claim 1, 1 and 2 with the fact that, in order to clarify the average level
    Leaks, produced by the n-th number of pair piston strokes, measure the leakage parameters on the piston after each odd stroke on the level difference and on the rod after each even stroke on the level difference divided by the halved number of pair moves.
  3. 3. A device for measuring leakage of working fluid through the piston and rod of a hydraulic cylinder containing a tank, a load and
    the test cylinders interconnected by rods, pumping station c. hydraulic system of motion control, a device for measuring leaks in the form of measuring tanks with graduated
    tube, hydrodistributing equipment in the form of a block in parallel installed adjustable throttle and non-return valve, pressure gauges and limit switches that control the course of the rods,
    characterized in that the cavities of the load cylinder are communicated with the pumping station, the cavities of the cylinder being tested are connected through the hydrodistribution apparatus
    leak measurements, with the graduated tube made with a capillary section and mounted on the conical cap of each measuring container, and the volume of each of them does not exceed the volume of the corresponding
    the working cavity of the test cylinder.
SU884417016A 1988-03-02 1988-03-02 Method of measuring of rate of leakage of working fluid over piston and rod of hydraulic cylinder and device for performing such measurements SU1682648A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU884417016A SU1682648A1 (en) 1988-03-02 1988-03-02 Method of measuring of rate of leakage of working fluid over piston and rod of hydraulic cylinder and device for performing such measurements

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU884417016A SU1682648A1 (en) 1988-03-02 1988-03-02 Method of measuring of rate of leakage of working fluid over piston and rod of hydraulic cylinder and device for performing such measurements

Publications (1)

Publication Number Publication Date
SU1682648A1 true SU1682648A1 (en) 1991-10-07

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013106839A3 (en) * 2012-01-13 2013-09-06 Gulfstream Services, Inc. Method and apparatus for deactivating a hydraulic device that is leaking hydraulic oil
CN105298988A (en) * 2015-11-13 2016-02-03 湖南省产商品质量监督检验研究院 Hydraulic cylinder internal leakage testing device and method
CN105526210A (en) * 2016-01-13 2016-04-27 中南大学 Method and device for measuring micro inner leakage amount of any stroke position of hydraulic cylinder
CN105864148A (en) * 2016-05-10 2016-08-17 燕山大学 Qualified measuring device and method of leakage rate of sealing rings for hydraulic cylinder
CN106762947A (en) * 2016-12-30 2017-05-31 河海大学常州校区 A kind of single-action hydraulic cylinder shown with internal leakage
CN106762946A (en) * 2016-12-30 2017-05-31 河海大学常州校区 A kind of single-action hydraulic cylinder shown with internal leakage
CN107387502A (en) * 2017-09-04 2017-11-24 上海意称液压系统有限公司 The integrated test system and method for a kind of valve body
CN110195732A (en) * 2019-06-26 2019-09-03 山东大学 It is a kind of suitable for the pressure load simulation system of deep sea equipment hydraulic system and its application

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Марутов В.А. и др. Гидроцилиндры. - М.: Машиностроение, 1966, с. 166, рис.120. *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10605372B2 (en) 2012-01-13 2020-03-31 Gulfstream Services, Inc. Method and apparatus for deactivating a hydraulic device that is leaking hydraulic oil
WO2013106839A3 (en) * 2012-01-13 2013-09-06 Gulfstream Services, Inc. Method and apparatus for deactivating a hydraulic device that is leaking hydraulic oil
EA030924B1 (en) * 2012-01-13 2018-10-31 Гальфстрим Сервисез Инк. Method and apparatus for deactivating a hydraulic device that is leaking hydraulic oil
CN105298988B (en) * 2015-11-13 2018-08-21 湖南省产商品质量监督检验研究院 Hydraulic cylinder interior leakage leaks test device and method
CN105298988A (en) * 2015-11-13 2016-02-03 湖南省产商品质量监督检验研究院 Hydraulic cylinder internal leakage testing device and method
CN105526210A (en) * 2016-01-13 2016-04-27 中南大学 Method and device for measuring micro inner leakage amount of any stroke position of hydraulic cylinder
CN105526210B (en) * 2016-01-13 2017-09-19 中南大学 A kind of small internal leakage measuring method in hydraulic cylinder arbitrary distance of run position and its device
CN105864148A (en) * 2016-05-10 2016-08-17 燕山大学 Qualified measuring device and method of leakage rate of sealing rings for hydraulic cylinder
CN106762947B (en) * 2016-12-30 2018-05-18 河海大学常州校区 A kind of single-action hydraulic cylinder shown with internal leakage
CN106762946B (en) * 2016-12-30 2018-05-18 河海大学常州校区 A kind of single-action hydraulic cylinder shown with internal leakage
CN106762947A (en) * 2016-12-30 2017-05-31 河海大学常州校区 A kind of single-action hydraulic cylinder shown with internal leakage
CN106762946A (en) * 2016-12-30 2017-05-31 河海大学常州校区 A kind of single-action hydraulic cylinder shown with internal leakage
CN107387502A (en) * 2017-09-04 2017-11-24 上海意称液压系统有限公司 The integrated test system and method for a kind of valve body
CN110195732A (en) * 2019-06-26 2019-09-03 山东大学 It is a kind of suitable for the pressure load simulation system of deep sea equipment hydraulic system and its application
CN110195732B (en) * 2019-06-26 2020-10-30 山东大学 Pressure load simulation system suitable for deep sea equipment hydraulic system and application thereof

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