KR20160020775A - Hydraulic Drive System Applied Blather type Volume Compensator and Performance Tester for Blather type Volume Compensator - Google Patents

Abstract

The present invention relates to a bladder-type volume compensator, a hydraulic driving system and to a performance tester of a bladder-type volume compensator. The bladder-type volume compensator according to the present invention comprises: a bladder (13) expanding or contracting to compensate for the volume change of working oil in the inner space of a housing body (11) into which the working oil changing volume at temperatures lower or higher than room temperature is introduced. The bladder-type volume compensator is applied to a discharge-type hydraulic driving system (1), which is composed of a discharge-type volume compensator (10) to discharge the working oil to the outside, or is applied to a circulating hydraulic driving system (101), which is composed of a sealed volume compensator (10-1) to restore the working oil to an oil reservoir (3). Therefore, the hydraulic driving system is protected from mechanical damage or deterioration in sealing performance, which can be caused by the volume change of the working oil, and cavitation caused by a decrease in pressure. Also, the performance of the bladder (13) can be tested simply using a performance tester including a hydraulic piston assembly (100) for expanding or contracting the bladder (13) by varying the pressure of the working oil.

Description

Technical Field [0001] The present invention relates to a bladder type volume compensator, a hydraulic driving system, and a bladder type volume compensator,

The present invention relates to a hydraulic drive system, and more particularly, to a bladder type volume compensator and a hydraulic drive system, a bladder type volume compensator performance test apparatus for providing a stable operation performance of a hydraulic drive system even when a temperature of a hydraulic oil will be.

A hydraulic drive system is applied to the missile to be controlled using the working fluid (hydraulic pressure or gas pressure).

The hydraulic drive system includes a drive source supplied with the hydraulic fluid, a power source supplying the hydraulic fluid stored in the lower hydraulic pump when the flow rate of the drive fluid is required, an operating fluid pipeline line circulating the hydraulic fluid, a volume considering the expansion or contraction characteristics Compensator.

Particularly, the volume compensator prevents a mechanical damage or a sealing performance which may be caused in the hydraulic drive system when the internal pressure is increased due to the operating oil, cavitation due to pressure reduction, and the like.

Examples of such techniques are disclosed in Korean Patent Publication (10-2005-0044511 (2005.05.26)) and domestic patent registered document (10-04772400000 (2005.03.08)).

The above-mentioned Korean Patent Application No. 10-2005-0044511 discloses an accumulator using a metal bellows. The accumulator maintains airtightness by a bellows for dividing the chamber into a filling gas chamber and a fluid inlet chamber, and compensates pressure of the operating oil by the filling gas. And a volume compensation function according to the ambient temperature change is implemented at the same time.

The Korean Patent Registration No. 10-2002-0016208 is a low-pressure accumulator having an auxiliary piston, and illustrates a technique related to an accumulator that maintains the pressure of the hydraulic oil through the oil passage by the restoring force of the built-in spring.

Korean Patent Publication No. 10-2005-0044511 (May 26, 2005) Domestic patent registration 10-04772400000 (2003.03.08)

However, since the Korean patent document and the Korean patent document do not easily constitute a lightweight / miniaturized system due to a complicated apparatus, it is difficult to apply the system in the development of an integrated system such as a small-sized high-speed guided missile, Which is inevitable for low-cost systems.

In view of the above, it is an object of the present invention to greatly improve the safety of the control of the missile by controlling the airtightness of the closed loop of the hydraulic drive system in the volume change state of the working fluid according to the storage and operation temperature changes, The present invention provides a bladder type volume compensator, a hydraulic drive system, and a bladder type volume compensator performance testing apparatus that can be simplified and simplified in structure, easy in weight, and easy to maintain, and can be small /

In order to accomplish the above object, a bladder type volume compensator of the present invention comprises: a housing body installed in a piping line through which hydraulic fluid for causing a volume change to a low temperature and a high temperature condition relative to a normal temperature flows; A bladder installed at an inlet through which the hydraulic oil flows in the inner space of the housing body and expand or contract to compensate for a change in volume of the hydraulic oil; A fixer fixing the bladder to an inner space wall surface of the housing body; A plug coupled to the housing body to seal an inner space of the housing body; Is included.

The bladder is made of rubber. The inner space of the housing body is designed in accordance with the expansion shape and the shrinkage shape of the bladder by the operating oil. A discharge hole is opened in the plug, and the discharge hole discharges the operating fluid that has caused the breakage of the bladder to the outside of the housing body. The plug has a load distribution surface, and the bladder, which is expanded by the hydraulic oil, is closely attached to the load distribution surface. The cross section of the load distribution surface is a circular section shape.

In order to accomplish the above object, there is provided a hydraulic drive system using a bladder type volume compensator according to the present invention. A power source for supplying the operating fluid to the actuator at a set pressure; A piping line through which the hydraulic oil flows from the low organic matter to the driver; A bladder for expanding or contracting to compensate for a change in volume of the operating oil in an internal space of a housing body into which a working oil causing a volume change occurs at a low temperature and a high temperature relative to normal temperature; A discharge type volume compensator formed of a plug sealing the space and a discharge hole for discharging the operating oil to the outside, the discharge type volumetric compensator installed in the piping line; Is included.

Wherein the piping line comprises an operating hydraulic pressure supply line extending from the low organic matter to the actuator and an operating hydraulic pressure adjusting line provided with the discharge type volumetric compensator not connected to the low organic matter, .

In order to accomplish the above object, there is provided a hydraulic drive system using a bladder type volume compensator according to the present invention. A power source for supplying the operating fluid to the actuator at a set pressure; A piping line through which the hydraulic oil flows from the low organic matter to the driver; A bladder for expanding or contracting to compensate for a change in volume of the operating oil in an internal space of a housing body into which a working oil causing a volume change occurs at a low temperature and a high temperature relative to normal temperature; A closed volume compensator formed of a plug sealing the space and a load distribution surface on which the bladder is closely attached to support the expansion state of the bladder, the closed volume compensator being installed in the pipeline; Is included.

Wherein the piping line is connected to an operating hydraulic pressure supply line leading from the low vacuum to the actuator, an operating hydraulic pressure adjusting line leading from the actuator to the closed volume compensator, and an operating hydraulic return line connected to the low vacuum from the closed volume compensator And forms a circulating hydraulic drive system.

In order to accomplish the above object, the apparatus for testing the performance of a bladder type volume compensator of the present invention compensates for the volume change of the operating oil in the internal space of the housing body into which the operating oil causing the volume change occurs at low temperature and high temperature, A hydraulic piston assembly for delivering hydraulic fluid under pressure to the expanding or contracting bladder; A linear actuator for linearly reciprocating the piston of the hydraulic piston assembly; An operating oil piping line connecting an operating oil chamber of the hydraulic piston assembly to an inlet of the housing body; A position sensor for detecting a moving position of the linear actuator; A pressure gauge for detecting a pressure flowing through the working oil piping line; Is included.

In the present invention, since the volume compensator of the small hydraulic drive system, which is a key element of the high-speed guided missile, is made of a bladder type volume compensator capable of realizing a compact / multifunctional type with a simple structure using a rubber bladder at low cost, reliability by structure simplification and light weight Improvement and maintenance are provided, contributing to the design of miniaturization, light weight, and low cost of a hydraulic drive apparatus for heavy-duty toddler.

Further, the bladder type volume compensator of the present invention has a simple structure as compared with the conventional piston or bellows type volume compensator, and can be realized as a small / multifunctional type at low cost, thereby contributing to a reduction in cost of the hydraulic drive system.

In addition, the bladder type volume compensator of the present invention has an effect of contributing to technological development in the fields of defense and aerospace by being utilized in development of a similar hydraulic drive system in which the working fluid circulates in the closed loop.

In addition, the bladder type volume compensator of the present invention has an effect of maintaining high reliability even when the hydraulic drive system is subjected to any environmental condition by evaluating the durability life of the rubber material bladder using the performance testing apparatus.

FIG. 1 is a configuration diagram of a discharge type hydraulic drive system using a bladder type volume compensator according to the present invention, FIG. 2 is an operational state of a bladder type volume compensator in operation of a discharge type hydraulic drive system according to the present invention, FIG. 4 is a block diagram of a performance testing apparatus for testing a bladder type volume compensator applied to a hydraulic drive system according to the present invention. FIG. 4 is a block diagram of a performance testing apparatus for testing a bladder type volume compensator using the bladder type volume compensator according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The present invention is not limited to these embodiments.

1 shows a configuration of a discharge type hydraulic drive system using a bladder type volume compensator according to a first embodiment of the present invention.

As shown, the discharge hydraulic drive system 1 includes a power source 2, a low organic 3, a piping line, a driver 5, and a discharge type volume compensator 10.

Specifically, the power source 2 supplies the operating fluid required by the actuator 5 to the actuator 5 from the low-pressure fluid 3 at a set pressure. To this end, the power source 2 may be a high-pressure vessel in which a high-pressure gas that can pressurize the hydraulic fluid of the low-pressure organic body 3 to a high pressure or a pump that pumps the hydraulic fluid of the low-pressure organic body 3 may be applied.

The low organic matter (3) stores operating oil that the power source (2) pumps and supplies to the driver (5).

The piping line is constituted by an operating hydraulic pressure supply line 3-1 which is extended from the low organic part 3 to the driver 5 and an operating hydraulic pressure adjusting line 5-1 which is exposed to the outside from the driver 5 . Therefore, the hydraulic drive system 1 is configured as an exhaust type by forming the open line which does not go to the low organic matter 3 after the pipeline line comes out from the low organic matter 3 to the drive machine 5. [ In this discharge type hydraulic drive system 1, the operating oil exits from the low organic matter 3 to operate the drive unit 5 and then to the outside.

In addition, a power source 2 is provided in front of the driver 5 in the working hydraulic pressure supply line 3-1. However, if the power source 2 is a high-pressure vessel storing a high-pressure gas without applying a pump for pumping operating oil of the low-organic 3, it can be directly connected to the low- The discharge-type volumetric compensator 10 is installed at the rear of the actuator 5 in the working oil pressure adjusting line 5-1.

The driver (5) is a hydraulic drive device for a magazine.

The discharge type volume compensator 10 is composed of a housing body 11, a bladder 13, a fixer 15, and a plug 17. The exhaust-type volume compensator 10 according to this configuration is capable of compensating for the expansion or contraction due to the temperature change of the operating oil present on the low organic matter 3, the working oil pressure supply line 3-1 and the working oil pressure adjusting line 5-1. Prevent impact. As a result, the discharge type hydraulic drive system 1 can be prevented from any mechanical damage or sealing performance deterioration that may be caused by volume change of the operating oil, cavitation by the pressure reduction, and the like.

Specifically, the housing body 11 includes an inlet nipple 11-1 connected to the operating oil pressure regulating line 5-1, and an opening portion of a space through which the bladder 13 can expand And a chamber extension portion 11-2 closed by a plug 17.

The bladder 13 is made of a rubber material and is expanded to the volume and temperature of the operating oil in the chamber extension 11-2 of the housing body 11. [

Therefore, the shape of the space of the chamber extension 11-2 of the housing body 11 and the shape of the bladder 13 are designed in accordance with the expansion characteristics of the rubber material applied to the bladder 13. For this, Equation (1) above is applied.

---------- (1)

---------- (One)

는 작동유의 체적팽창 계수,

는 작동유체 체적,

는 최대온도 변화량,

는 체적 변화량을 의미한다.here,

Is the volume expansion coefficient of the working oil,

Is a working fluid volume,

The maximum temperature change amount,

Means volume change.

The fixer 15 fixes the bladder 13 to the wall surface of the chamber extension 11-2 of the housing body 11. [ To this end, the picker 15 applies screws or bolts.

The plug 17 is inserted into the opening of the chamber extending portion 11-2 of the housing body 11 to form a space of the chamber extending portion 11-2 as a closed space. Particularly, since the discharge hole 17-1 is opened in the plug 17, the operating fluid of excessive pressure which causes the bladder 13 to break can be discharged to the outside without going to the driver 5. [

On the other hand, Fig. 2 shows an operating state in which the discharge hydraulic drive system 1 is safely protected using the action of the discharge type volumetric compensator 10.

As shown in the figure, the operating oil supplied to the driver 5 from the low organic matter 3 flows through the working hydraulic pressure supply line 3-1 and the working hydraulic pressure adjusting line 5-1, 1 to the exhaust-type volume compensator 10 connected to the inlet nipple 11-1.

Then, the bladder 13 of the discharge type volume compensator 10 expands in the space of the chamber extension part 11-2 of the housing body 11 according to the degree of pressure of the operating oil, thereby maintaining the operating oil pressure at the set pressure . For example, the bladder 13 is placed in the neutral position E-2 under normal temperature conditions and deformed to the maximum position E-3 corresponding to the volume expansion amount V _MAX set in the high-temperature storage condition, It is transformed to the minimum position (E-1) corresponding to the volume shrinkage amount (V _MIN ) set in the storage condition.

Therefore, the discharge-type volume compensator 10 can be used as a discharge type hydraulic pressure drive system 1 (hereinafter, referred to as " discharge type hydraulic pressure compensator 10 ") due to a mechanical damage or a sealing performance deterioration, ). ≪ / RTI >

On the other hand, when the discharge hydraulic drive system 1 is switched to the operating condition, in the bladder 13 of the discharge type volume compensator 10, the volume of the hydraulic oil discharged from the drive machine 5 exceeds the set value V _MAX As a result, the bladder 13 touches the discharge plug 17 and ruptures (R), so that the operating oil therein is discharged to the outside.

FIG. 3 shows a configuration of a circulating hydraulic drive system using a bladder type volume compensator according to a second embodiment of the present invention.

As shown, the circulating hydraulic drive system 1-1 includes a power source 2, a low organic 3, a piping line, a driver 5, and an enclosed volume compensator 10-1.

In this case, the power source 2, the low organic matter 3 and the driver 5 are the same as the power source 2, the low organic matter 3 and the driver 5 described with reference to FIGS. However, the closed volume compensator (10-1) is different from the discharge valve described in Figs. 1 and 2 in that the piping line described in Figs. 1 and 2 is an open circuit, Unlike the food volume compensator 10, there is a difference in that the operating oil is returned to the low organic matter 3 without discharging it to the outside. Therefore, the working oil is supplied in a circulating manner from the low organic matter 3 to the driving machine 5, and then from the driving machine 5 to the low organic matter 3 again.

Specifically, the piping line includes an operating hydraulic pressure supply line 3-1 connected to the actuator 5 from the low vacuum 3, an operating hydraulic pressure control line 3-1 connected to the closed volume compensator 10-1 from the actuator 5, (5-1), and an operating hydraulic return line (5-2) leading from the closed volume compensator (10-1) to the low organic (3). In particular, the working hydraulic pressure adjusting line 5-1 and the working hydraulic return line 5-2 may be formed of one piping line.

Specifically, the closed volume compensator 10-1 includes a housing body 11 having an inlet nipple 11-1 and a chamber extension portion 11-2, a bladder 13 expanding by operating oil, The fixture 15 is fixed to the wall of the chamber extension part 11-2 by being engaged with the opening part of the chamber extension part 11-2, As shown in Fig. Therefore, the housing body 11, the bladder 13 and the fixer 15 are the same as the functions of the housing body 11, the bladder 13 and the picker 15 described with reference to FIGS. Do.

However, the plug 17 forms a load distribution surface 17-2 having a circular section shape, and the load distribution surface 17-2 is supported by the bladder 13, which is expanded by the operating oil, The external discharge of the operating oil can be suppressed and the hydraulic pressure can be maintained.

Therefore, the circulating hydraulic drive system 1-1 is divided into two types according to the installation position of the closed volume compensator 10-1. Case 1 is a closed type volume compensator 10-1 which is disposed between the low organic matter 3 and the drive 5 in the working oil pressure supply line 3-1 where the closed volume compensator 10-1 is connected from the low organic matter 3 to the drive device 5. [ 1 shows an example of the hydraulic drive system 1-1. Case 2 shows an example of a circulating hydraulic drive system 1-1 in which an enclosed volumetric compensator 10-1 is provided on an operating hydraulic pressure adjusting line 5-1 from a driver 5. [

On the other hand, FIG. 4 shows a configuration of a performance test apparatus capable of testing a bladder type volume compensator applied to the hydraulic drive system according to the present embodiment.

As shown, the performance testing apparatus comprises a hydraulic piston assembly 100, a linear actuator 200, a position sensor 300, an operating oil piping line 400, and a pressure gauge 500.

The hydraulic piston assembly 100 supplies operating fluid of a predetermined pressure to the bladder 13 provided in the chamber extension portion 11-2 of the housing body 11 through the inlet nipple 11-1. For this, the piston of the hydraulic piston assembly 100 is connected to the linear actuator 200 to realize a linear reciprocating motion. The operating oil chamber of the hydraulic piston assembly 100 is connected to the inlet nipple 11-1 of the housing body 11 by the operating oil piping line 400 so that the operating oil pressurized by the piston is supplied to the bladder 13. [

The linear actuator 200 is provided with a position sensor 300 to adjust the speed of hydraulic oil flowing out of the hydraulic piston assembly 100. The pressure gauge 500 is installed in the hydraulic oil line 400, The pressure of the operating oil flowing out of the compressor 100 can be adjusted. As a result, the expansion size of the bladder 13 can be realized to a desired extent, and the breakage of the bladder 13 can also be tested.

Therefore, each performance of the closed type volume compensator 10-1 and the discharge type volume compensator 10 having the bladder 13 as a core component can be inspected by the operating oil supplying method of the performance testing apparatus.

As described above, the bladder type volume compensator according to the present embodiment is configured to expand or contract to compensate for the volume change of the operating oil in the internal space of the housing body 11 into which the operating oil causing the volume change occurs at the low- and high- The present invention is applicable to a discharge type hydraulic drive system 1 in which a bladder 13 for shrinking is provided and a bladder type volume compensator is constituted by a discharge type volume compensator 10 to discharge operating oil to the outside, -1) and is applied to the circulating hydraulic drive system 101 for returning the operating oil to the low organic matter 3, it is possible to prevent the mechanical damage or the sealing performance deterioration of the operating oil, The hydraulic drive system is protected from concern. Also, the performance test of the bladder 13 can be easily implemented by the performance testing apparatus including the hydraulic piston assembly 100 that varies the pressure of the hydraulic oil to expand or contract the bladder 13.

1: Discharge type hydraulic drive system 1-1: Circulation type hydraulic drive system
2: Power source 3: Low organic
3-1: Operation hydraulic supply line 5: Driver
5-1: Operation hydraulic control line 5-2: Operation hydraulic return line
10: Exhaust type volume compensator 10-1: Closed volume compensator
11: Housing body 11-1: Inlet Nipple
11-2: chamber extension part 13: bladder
15: Fixer 17: Plug
17-1: discharge hole 17-2: load distribution surface
100: Hydraulic piston assembly
200: linear actuator 300: position sensor
400: Working fluid piping line 500: Pressure gauge

Claims (12)

A housing body installed on a pipeline line through which hydraulic fluid is caused to change in volume at a low temperature and a high temperature relative to room temperature;
A bladder installed at an inlet through which the hydraulic oil flows in the inner space of the housing body and expand or contract to compensate for a change in volume of the hydraulic oil;
A fixer fixing the bladder to an inner space wall surface of the housing body;
A plug coupled to the housing body to seal an inner space of the housing body;
Wherein the volume compensator comprises:
The bladder type volume compensator according to claim 1, wherein the bladder is made of a rubber material.
The bladder type volume compensator according to claim 1, wherein the inner space of the housing body is designed to match the expansion shape and the shrinkage shape of the bladder by the operating oil.
The bladder type volume compensator according to claim 1, wherein a discharge hole is formed in the plug, and the discharge hole discharges the operating fluid that has caused the bladder to break out of the housing body.
The bladder type volume compensator according to claim 1, wherein a load distribution surface is formed in the plug, and the bladder expanded by the operating oil is closely attached to the load distribution surface.
The bladder type volume compensator according to claim 5, wherein the cross section of the load distribution surface is a circular arc shape.
Low organic storage oil;
A power source for supplying the operating fluid to the actuator at a set pressure;
A piping line through which the hydraulic oil flows from the low organic matter to the driver;
An exhaust type volume compensator comprising the housing body, the bladder, the fixture, the plug, and the discharge hole according to any one of claims 1 to 4 and installed in the piping line.
Wherein the hydraulic actuator is a hydraulic actuator.
The exhaust system of claim 7, wherein the piping line comprises an operating hydraulic pressure supply line extending from the low vacuum to the actuator, and an operating hydraulic pressure control line extending from the actuator to the exhaust- Wherein the discharge hydraulic drive system is a discharge hydraulic drive system.
Low organic storage oil;
A power source for supplying the operating fluid to the actuator at a set pressure;
A piping line through which the hydraulic oil flows from the low organic matter to the driver;
An enclosed volume compensator comprising the housing body, the bladder, the fixture, the plug, and the load distribution surface according to any one of claims 1 to 3, 5 and 6 and installed in the piping line.
Wherein the hydraulic actuator is a hydraulic actuator. 10. The system of claim 9, wherein said piping line comprises an operating hydraulic pressure supply line leading from said low organic to said actuator, an operating hydraulic pressure control line leading from said actuator to said hermetic volume compensator, And an operating hydraulic return line to form a circulating hydraulic drive system. ≪ RTI ID = 0.0 > A < / RTI >
The hydraulic drive system as claimed in claim 10, wherein the operating hydraulic pressure adjusting line and the operating hydraulic return line are formed by one line.
A hydraulic piston assembly for supplying operating fluid in a pressure state to a bladder which expands or contracts to compensate for a change in volume of the operating fluid in an inner space of a housing body into which a working fluid causing a volume change is introduced at a low temperature and a high temperature temperature condition;
A linear actuator for linearly reciprocating the piston of the hydraulic piston assembly;
An operating oil piping line connecting an operating oil chamber of the hydraulic piston assembly to an inlet of the housing body;
A position sensor for detecting a moving position of the linear actuator;
A pressure gauge for detecting a pressure flowing through the working oil piping line;
Wherein the volume compensator comprises:

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