Device for cleaning of hydraulic system work liquid

FIELD: machine building.

SUBSTANCE: invention relates to the hydraulic actuators, namely to structural elements affecting the fluid properties, in particular by means of the filtering. The device contains actuator 2, tank 6 and hydraulic pump 1 hydraulically connected with each other, hydraulic distributor 4 and control unit of hydraulic distributor 3, equipped with transmitter 7 to monitor fluid cleanness, according to the solution the device contains the additional cleaning unit 5, the fluid cleanness transmitter 7 is installed at output of the actuator 2, the hydraulic distributor 4 has input and two outputs, at that input is hydraulically connected with the actuator 2 output, the first output is hydraulically connected with tank 6 input, the second output is hydraulically connected with input of the additional cleaning unit 5, at that output of the additional cleaning unit is connected with tank 6 input.

EFFECT: increased reliability of maintenance of the required cleanness of the work liquid.

6 cl, 2 dwg

 

The invention relates to hydraulic actuators, namely the structural elements intended to influence the properties of a fluid medium, in particular by filtration.

A device for cleaning the working fluid, intended for hydraulic actuators of the control system by turning and/or hydraulic system mounted implement tractor Kirovets K-701, K-700A, K-700, K-744 (see "Tractors Kirovets K-701, K-700A", "Tracerecord" of the USSR, Moscow, pp. 69-81). The cleaning device includes a tank for hydraulic fluid, the inlet of which is provided with a filter element, and the output is connected to the suction box of the pump. Forcing the window of the pump is connected to the input of the hydraulic system, wherein the output of the hydraulic system is connected to the input of the tank.

However, the known device has a low resource due to rapid contamination of the filter elements and lack of reliability maintain the required cleanliness level of the working fluid.

Known installation for sampling, cleaning and delivery of the working fluid when servicing units (see the patent for invention RU 2059901, IPC F15B 21/04, B01D 36/00). The unit is designed to clean the working fluid of the hydraulic system containing actuators, tank and a hydraulic pump hydraulically connected between the FDS�th, and made as a separate universal unit for temporary connection to a variety of hydraulic systems. The device includes two tanks, the first blank to drain the contaminated fluid from the hydraulic system, the second contains pure working fluid to fill the hydraulic system; a filter unit that is designed to clean the working fluid pumped from the first tank to the second; valves and power control valves, equipped with a sensor to monitor fluid cleanliness.

The disadvantage of this device is the complexity and pulsating cleaning mode.

The object of the invention is to develop a device for cleaning the working fluid, embedded in the hydraulic system and provide clearance at any moment when necessary.

The technical result consists in increasing the reliability of maintaining the required level of purity of the working fluid.

Said technical result is achieved in that the device for cleaning the working fluid of the hydraulic system containing the actuator, the tank and the hydraulic pump, hydraulically interconnected, includes the control valve and the control valve, is provided with a sensor to monitor fluid cleanliness, according to the decision device comprises a block further purification, the sensor contacts�Olya fluid cleanliness is installed at the outlet of the actuating mechanism, the control valve has an input and two outputs, wherein the input hydraulically connected to the output of the actuating mechanism, the first output is hydraulically connected with the inlet to the tank, the second output is hydraulically connected with the input unit further purification, wherein the output unit further purification is connected to the input to the tank. The sensor control fluid cleanliness provides a measure of the cleanliness of liquid in accordance with the standards of GOST 117216 or ISO 4406. The control valve provides on/off unit further purification to achieve a given level of contaminant concentration. The control unit informs about the valve unit defective further purification in excess of the predetermined level of contaminant concentration on two classes of fluid cleanliness. The control valve provides a measure of the rate of change of the grade of purity of the liquid and informs about the degree of wear of the actuators of the hydraulic system. The control valve provides a measure of the period between the inclusions unit further purification and in the case that it will be less than 0.5 arithmetic mean of the last ten periods, informs about the failure of the hydraulic system.

The invention is illustrated by drawings, where Fig. 1 shows �Hema hydraulic and electric connection unit further purification of the working fluid, Fig. 2 shows a detailed diagram of the control unit of the level of contamination of the working fluid and control an additional cleanup. Positions indicated on drawings:

1 - hydraulic pump equipment;

2 - actuators of the equipment;

3 - control unit;

4 - valve;

5 is a block further purification;

6 - tank hydraulic equipment;

7 - sensor control fluid cleanliness;

8 - unit analog signal processing;

9 - block digital signal processing;

10 - display unit;

11 - block with information about particulate matter pollution;

12 - unit comparison;

13 - setting unit permissible level of fluid cleanliness;

14 - the block of keys.

As is well known (see GOST 28028 "Hydraulic - General requirements and regulations table 1 - section 2.2.) resource units increases 10-fold with increasing fluid cleanliness of hydraulic system from 17 to 9 classes of purity of the working fluid according to the norms of GOST 17216. According to the claimed solution to continuously maintain a predetermined cleanliness level of the working fluid of the hydraulic actuators in embedded device comprising a block of additional cleaning fluids and monitor fluid cleanliness control unit further purification.

Claimed device contains the standard elements of hydraulic�of orogovenia - hydraulic pump equipment 1, the actuators of the equipment 2 and the hydraulic tank 6 hardware, hydraulically interconnected through pipelines of a high pressure so that the output of the tank is connected with a suction pump window equipment 1, delivery box of the pump is connected to the input of the actuators. The output actuators of the hydraulic system is provided with a sensor 7 for monitoring the integrity of the fluid and is connected to the input of the control valve 4.

As a sensor for monitoring the integrity of the fluid may be any device, corresponding to GOST 31247-2004 "Clean industrial. Definition of fluid contamination by automatic particle counters". From the devices of the control fluid cleanliness, mass-produced, to perform the functions of the sensor control fluid cleanliness in the proposed device can be used, for example: 1) the Analyzer of fluid contamination ASG-975 (spb.ru/pribor_AZG-975-analizator-zagryazneniya-gidkosti) NPO "Aurora" in St. Petersburg, designed to automatically measure number concentration of particles of mechanical impurities in liquids in accordance with GOST 17216; 2) the Device control fluid cleanliness PKG-904 (a) production of JSC "THREADS Tesar" Saratov, allowing quick control the purity of the fluids in accordance with �removename GOST 17216-2001; 3) Laser monitor contamination LCM20.2021/2023 ( Operations Manual.pdf) company "Parker Yannifin Ltd Holland; 4) particle Counter in liquid Av Count model SA1000 () firm "Stunhope-Seta", UK. In the best embodiment of the claimed device as a sensor for monitoring the integrity of the fluid device is used to control the purity of the fluid stream IJ (; ), made LLC "SIC "Tern-MO" the city of Saratov with 2010 by RF patents for invention №2328723 "METHOD of DETERMINING the concentration of MECHANICAL IMPURITIES IN LIQUID AND GASEOUS MEDIA AND DEVICE FOR ITS IMPLEMENTATION", dated 10 July 2008 and No. 2359250 "METHOD of CONTROL FLUID CLEANLINESS" of 20 June 2009

The valve has two outputs, one of which is connected to the input of the tank and the other to the input unit further purification 5.

As a block of additional cleaning liquid can be used any cleaner, corresponding to GOST 26070-83 Filters and separators for liquids. If the filter unit is used, it should correspond to GOST P 50553-93 "Industrial purity. Filters and filter elements. General technical requirements". For more efficient and convenient use of cleaners used or the filter plant must cleanse fluids not worse than 7 cleanliness class according to the norms of GOST 17216 and being adapted to be embedded in auto�e filing system and cleaning fluid. In the best embodiment of the inventive device for cleaning the working fluid of the hydraulic system as a block further purification used centrifugal cleaner fluid type SOE-913, (), produced JSC "THREADS Tesar" Saratov in the Russian Federation patent for invention No. 2402384 "INSTALLATION of CLEANING LIQUIDS from October 27, 2010 and No. 2274496 "DEVICE FOR the drainage of LIQUID FROM the CENTRIFUGAL PURIFIER" from April 20, 2006

The control valve is connected to the control unit 3, is provided with a sensor for monitoring the integrity of the liquid 7, and the sensor installed on the outlet of the Executive mechanisms of the equipment so that the sensor input is hydraulically connected with a pipe line of high pressure connecting the output actuators to the input of the control valve, and the sensor output is connected to the input of the tank.

The control unit comprises a processing unit, the analog signal 8 whose input is connected to the sensor control fluid cleanliness 7 for receiving signals from it. The output unit 8 is connected to the processing unit digital signal 9, is provided with two outputs, one of which is connected to the display unit 10 to display on it the cleanliness of the working fluid according to GOST 117216, a display unit connected to the information block 11 on the concentration of particulate contamination as per ISO 4406. The control unit contains the unit of comparison 2, equipped with two inputs and two outputs, the first input connected to the setting unit permissible level of fluid cleanliness is 13, a second input connected to the second output of the digital signal processing 9. The first output of the Comparer is connected to the display unit 10, the second output is connected with a block of 14 keys, designed to control the modes of the control valve 4.

The invention operates as follows. Includes a pump 1, which drains the working fluid from the tank 6 and creates the necessary pressure of the working fluid in the hydraulic system 2. Excess fluid and waste fluid fed from the hydraulic system back to the tank through gidroraspredeliteli 4. In the process, there is continuous monitoring of fluid cleanliness in hydraulic system by means of sensor control fluid cleanliness 7. The sensor signal is supplied to the processing unit, the analog signals 8 where the gain, the alignment of the amplitude and duration of signal, converting the analog signal to digital. Unit 8, the signal in digital form is supplied to the processing unit digital signal 9, where the signal from the sensor is interpreted in the final result on a logarithmic scale, and also carry out the conversion of this result for a given program into classes of fluid cleanliness and the number of particles pollution�t in a unit volume of liquid, that is, the concentration of particle pollution. The received signals are passed to the display unit 10 and the information block 11 for visual monitoring of the pollution level and the comparison unit 12 is preset by the operator to the permissible level of pollution, information about which is contained in the set of acceptable cleanliness level of the fluid 13, and is actually measured by the sensor 7. The control unit receives information about the state of the working fluid from the sensor, and in case of exceeding the actually measured level of contamination over a given unit of comparison gives the command for the block of keys 14 for switching the control valve into the learning mode unit further purification of the working fluid 5. A block of keys 14 of the control unit 3 switches the mode of the control valve, including the operation unit further purification of the working fluid. All the liquid flows out of the hydraulic system to block further purification, and thence into the tank. By reducing the level of purity of the working fluid below a predetermined level of purity, the comparison unit gives a command to the block of keys on the switching valve in the shutdown mode unit further purification of the working fluid. A block of keys 14 of the control unit 3 switches the mode control valve and turns off the operation unit further purification. In operation, the hydraulic system, the level of pollution�items liquid may rise again, then it will lock the sensor cleaning cycle will repeat again. The program in block 9 provide for the issuance of control signals for turning on/off unit further purification aged for 15 min for the control stable liquid flow. A splash of indications of the level of contamination can be caused by short-term fluctuations in hydraulics and valves control the flow. Unit 9 thus captures the time between the inclusions unit further purification, providing a measurement of the period between the inclusions unit further purification, and in the case that it will be less than 0.5 arithmetic mean of the last ten periods, a signal to the indication unit that indicates to the user the presence of a fault in the hydraulic system, leading to excessively rapid contamination of the working fluid. When exceeding the predetermined level of contaminant concentration on two classes of purity of the liquid display unit 10 of the control unit 3 informs about the problem further purification. Block digital signal processing 9 of the control unit 3 provides a measure of the rate of change of the grade of purity of the liquid and feeds them to the display unit 10 a signal proportional to the degree of wear of the Executive mechanisms of the equipment 2.

1. Device for cleaning the working fluid of the hydraulic system containing the IP�additional mechanism, tank and a hydraulic pump, hydraulically interconnected, including the control valve and the control valve, is provided with a sensor for monitoring the integrity of the liquid, characterized in that the device comprises a block further purification, the sensor control fluid cleanliness is installed at the outlet of the actuating mechanism, the control valve has an input and two outputs, wherein the input hydraulically connected to the output of the actuating mechanism, the first output is hydraulically connected with the inlet to the tank, the second output is hydraulically connected with the input unit further purification, wherein the output unit further purification is connected to the input to the tank.

2. The device according to claim 1, characterized in that the sensor of the control fluid cleanliness provides a measure of the cleanliness of liquid in accordance with the standards of GOST 117216 or ISO 4406.

3. The device according to claim 1, characterized in that the control unit hydraulic control valve provides on/off unit further purification to achieve a given level of contaminant concentration.

4. The device according to claim 1, characterized in that the control unit control valve shall notify of the fault block further purification in excess of the predetermined level of contaminant concentration on two classes of purity of the liquid.

5. The device according to claim 1, characterized in that b�OK control valve provides a measure of the rate of change of the grade of purity of the liquid and informs about the degree of wear of the actuators of the hydraulic system.

6. The device according to claim 1, characterized in that the control valve ensures the measurement period between turn-on unit extra clean and if it will be less than 0.5 arithmetic mean of the last ten periods, informs about the failure of the hydraulic system.



 

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