Gas mixing pump with variable cross section of inlet channel

FIELD: engines and pumps.

SUBSTANCE: mixing pump includes mixing gas chamber, inlet channels protruding into the mixing chamber for supply to mixing chamber of high pressure and low pressure gas; outlet channel for discharge of mixed gases; pneumatic actuating element located in inlet high pressure gas supply channel and containing movable piston rigidly attached to the plug the position of which in inlet channel determines the flow passage of high pressure gas to mixing chamber; control cavity of movable piston, to which the pressure determining the position of movable piston, pneumatic circuit between pressure source and control cavity is supplied. Besides, according to the invention, pneumatic circuit includes at least one bleed valve made so that leakage can be created in pneumatic circuit, which allows changing the pressure supplied to the control cavity.

EFFECT: creation of easy-to-operate gas mixing pump capable of changing the outlet gas pressure value with the specified or reference value.

17 cl, 5 dwg

 

The technical field

The invention relates to a gas, namely air pump-mixer with a variable cross-section of the intake channel.

Air pump-mixer is used, for example, in air conditioning systems of the aircraft to supply at the output of the pump-mixer air flow constant pressure, consisting of two threads of different air pressure.

The level of technology

In the prior art, for example, from the patent document US 2003/0205049 known jet pump mixer with a variable cross-section of the intake channel containing air mixing chamber; opening into the mixing chamber, the first inlet flow channel in the mixing chamber of the air is called air pressure (hereinafter - VD) under the first pressure; opening into the mixing chamber second inlet feed channel in the mixing chamber of the air, called low-pressure air (hereinafter - ND) under a second pressure lower than the first pressure; pneumatic Executive body containing a movable piston located in the first intake channel air supply VD, and a movable piston configured to move between a position called closed position in which it prevents the passage of air VD to the mixing chamber, and a so-called open position, in which it is the admission of the em passage VD air to the mixing chamber.

This pump-mixer allows you to change the amount of air VD supplied to the mixing chamber, thereby to provide at the output of the pump-mixer's mixed air constant pressure in any phase of flight, i.e. irrespective of the values of air pressure in the intake channel air supply VD and OD.

In addition, this pump-mixer allows you to limit the number of VD air taken from the main engines of the aircraft and to improve the performance and reliability of the main engines to reduce fuel consumption and improve the overall characteristics of the aircraft equipped with such a pump-mixer.

The air pressure at the outlet of the mixing chamber depends on the proportions of air VD and ND is supplied to the mixing chamber. This proportion depends on the position of the moving piston in the intake channel air supply VD in the mixing chamber. Thus, the pressure at the outlet of the pump-mixer depends directly on the position of the moving piston in the intake channel air supply VD.

According to patent document US 2003/0205049 position of the rolling piston Executive body with pneumatic control automatically regulates the pressure of the mixed air at the outlet of the mixing chamber. To do this, according to US 2003/0205049 there is odwazny piston, driven Executive body, which contains the body of the Executive authority, is designed to ensure that the direction of the rolling piston. This body Executive body also contains a cavity closure, which is air taken at the outlet of the mixing chamber, by using a feedback channel, located between the output of the mixing chamber and the cavity closure. The Executive body also contains valid at the closing spring located between the movable piston and the housing Executive body, and the air vent. As a result, each time the movable piston is the equilibrium position under the action of pressure in the cavity is closed, the stiffness of the spring, the size of the issue and other factors.

This pump-mixer allows you to get constant nominal outlet pressure of the pump-mixer regardless of the values of air pressure in the intake channel air supply VD and ND in the mixing chamber.

In addition, this pump-mixer allows you to automatically limit the intake air of internal Affairs upon reaching the nominal pressure due to the movement of the rolling piston to the closed position under the action of air taken at the output of the pump-mixer.

And finally, this pump-mixer and in particular pneumatice the cue Executive body allow on the one hand, to withstand temperatures taken from engines VD air, which can reach 500°C, and, on the other hand, use of available energy resources that allows you to limit the selection of VD air from the engines when the air pressure at the outlet of the pump-mixer reaches the nominal value.

However, this known pump-mixer not managed to generate at the output of the pump-mixer pressure differing from the nominal. This pressure depends on the cross section of the channels, the stiffness of the spring Executive body, and in General from the complex characteristics of the pump-mixer. In other words, the jet pump mixer by patent document US 2003/0205049 shall be designed for manufacturing such a way that regardless of the pressures VD and ND to provide at the output of the pump-mixer air under a certain pressure ratings, which can no longer be regulated. Accordingly, the use of such a pump-mixer is limited to the specific use for which it is designed.

Thus obtained at the output of the pump-mixer pressure is directly dependent on its characteristics - section channels, the stiffness of the spring, size of issue, etc., These characteristics are determined in the design office, for example, by creating a virtual layouts of Any discrepancy between theoretical and the actual characteristic leads to a change in the nominal pressure, actually obtained at the output of the pump-mixer. In other words, such a pump-mixer does not have a good large tolerances on features.

Disclosure of inventions

The invention aims to remedy these disadvantages and to create a pump-mixer with a variable cross-section of the exhaust channel, in which you can vary the amount of air pressure at the outlet of the pump-mixer in accordance with a set or reference value.

The objective of the invention is to create a pump-mixer, which provides the output air pressure that is not dependent on pressure of the air supplied to the pump-mixer.

Object of the invention is the formation of a gas pump-mixer with a variable cross-section of the intake channel having a nice large tolerances on features.

The objective of the invention is to create a pump-mixer, which can be installed and adapted for mounting on all types of aircraft.

The objective of the invention is to create a pump-mixer, which can be submitted gases at very high temperature.

The objective of the invention is to create a pump-mixer with a variable cross-section of the intake channel, which can be made serially and be adjusted for installation on aircraft of all types.

Object of the invention is that the creation of the pump-mixer with a variable cross-section of the intake channel, which enables fine control with high precision pressure output of the pump-mixer.

In accordance with the invention, the objectives are achieved in a gas, particularly air, the pump-mixer with a variable cross-section of the intake channel containing gas mixing chamber; opening into the mixing chamber, the first inlet flow channel in the mixing chamber of the gas, called high-pressure gas (hereinafter - gas VD), under the first pressure; opening into the mixing chamber second inlet feed channel in the mixing chamber of the gas, called low-pressure gas (hereinafter referred to LP gas), under the second pressure, different from the first pressure; associated with the mixing chamber outlet for release of mixing camera mixed gases, called the output gas, and this output gas has an intermediate pressure between a first pressure and a second specified pressure, depending on the proportions of the gases VD and ND is supplied to the mixing chamber; a pneumatic Executive body, located in the first inlet port, the gas supply VD, and this Executive body contains a movable piston rigidly connected with the tube, the position in which the inlet channel determines the flow area for gas VD to the mixing chamber, and the change in provisions is s of the piston causes a change in this flow area; cavity control of a movable piston, which is pressure in the pressure channel, and the pressure in the cavity of the control determines the position of the rolling piston; a pneumatic circuit called the power circuit, arranged between the pressure source, called the first pressure source and a pressure channel, and the power circuit is designed to apply pressure, called managing pressure in the cavity of the control pressure channel.

According to the invention the pump-mixer differs in that the power circuit includes at least one drain valve, located between the first pressure source and the pressure channel is designed in such a way as to create a leak in the power circuit with adjustable flow leakage, the value of which determines the pressure applied into the cavity of the pneumatic control of the Executive body.

The pump-mixer according to the invention allows to change the ratio VD/LP gas mixture, by acting on the pressure applied into the cavity of the control of the Executive body. This pressure is supplied power by a circuit which contains a drain valve, designed to create a leak in the power circuit that allows you to adjust the amount of pressure supplied to the cavity of the pneumatic control of the Executive'or is Ana, consequently, the magnitude of the pressure of the gas mixture at the outlet of the pump-mixer.

According to the invention preferably this valve is arranged to move between at least one position, called the open position, and at least one position, called the closed position, the pressure supplied to the power circuit in the cavity of the control of the Executive body, is lower in the open position, a discharge valve, than when it is closed.

If the outlet pressure of the pump-mixer should be reduced leakage in the power circuit can be reduced by transferring a discharge valve in closed position, so that the pressure supplied to the cavity of the pneumatic control of the Executive body, increases. This will cause an increase in the volume of the cavity and control the movement of the rolling piston to the position in which the flow area for gas VD decreases the tube, so that limits the amount of gas VD supplied to the mixing chamber. The new mixture at the outlet of the pump-mixer has a lower gas content VD than before closing a discharge valve, which reduces the pressure of the mixture.

The reverse way, if the outlet pressure of the pump-mixer should be increased, the leakage power of the circuit can be HC is licena by transferring a discharge valve in open position, so that the pressure supplied to the cavity of the pneumatic control of the Executive body, is reduced. This will cause a reduction in the volume of the cavity and control the movement of the rolling piston to the position in which the flow area for gas VD increases, so increases the number of gas VD supplied to the mixing chamber. The new mixture at the outlet of the pump-mixer has a higher gas content VD than before opening a discharge valve, which leads to increased pressure of the mixture.

According to the invention is preferably a drain valve configured to move between a closed position, called a fully closed position in which the pressure supplied to the control cavity, is the pressure of the first pressure source, and an open position, called a fully open position corresponding to the maximum opening of the drain valve.

Thus, the pump-mixer according to the invention, equipped with pneumatic circuit pressure in the cavity of the pneumatic control of the Executive body, containing at least one drain valve, allows you to feed the output of the pump-mixer preset or reference pressure, the value of which can be regulated.

Pneumatic circuit pump mixer according to the invention can content shall be one or more drain valves. Each valve can be made of various shapes and designs. A drain valve according to the invention may be a valve with a logic function "Yes - no" or proportional valve.

However, in the preferred embodiment of the invention, at least one valve is a proportional valve, is made with the possibility of stepless movement between a fully open position, called the position of maximum opening, and a closed position thus to provide a stepless change of the flow rate of the leak.

The pump-mixer according to this variant implementation allows stepless and accurately regulate the flow of leakage, created such a drain valve that allows stepless and with high accuracy to regulate the pressure supplied to the cavity of the control of the Executive authority, and, therefore, continuous and high precision positioning of the tube in the inlet channel of the gas supply VD. Thus, the output gas mixture can be with high precision metered gas HP and LP gas. This allows you to get a certain pressure, which can have any value and can be infinitely adjusted between values close to the pressure of the gas HP and LP gas.

Gas o the de pump-mixer can have pressure, equal to the gas pressure LP, with full overlap of the inlet port of the gas supply VD. In contrast, since the inlet gas supply channel OD may not overlap, the maximum pressure at the output of the pump-mixer can only be lower than the gas pressure VD.

Opening and closing a discharge valve may be secured by various means - mechanical, pneumatic, electrical and other.

Preferably the pump-mixer according to the invention contains an electric motor, is designed to prevent the movement of a discharge valve between a fully open position and a fully closed position and Vice versa.

Preferably the pump-mixer according to the invention contains a pressure sensor located at the outlet of the pump-mixer and is designed to submit measuring a pressure signal representing the pressure of the output gas; electric control unit is designed to accept a reference signal representing a reference value of the pressure, which the pump-mixer must provide at the output, and measuring the pressure signal supplied by the pressure sensor, and the electric control unit is designed in such a way as to apply to the motor command to start the process of opening/closing the drain CL the pan or valve so to vary the amount of pressure supplied to the control cavity so that the tube can move in the inlet channel of the gas supply VD and to the pump-mixer provided at the output of the output gas under specified reference pressure.

This pump-mixer containing the electrical control unit capable of receiving the reference pressure and the measured pressure at the outlet of the pump-mixer, allows you to generate and to transmit to the motor command so that the motor causes movement of each discharge valve to provide at the output of the pump-mixer gas mixture under predetermined or reference pressure.

Thus, the pump-mixer allows you to adjust the output pressure. This regulation can be thin and precision through the use of an electric motor made with the possibility of direct or indirect drive each discharge valve for opening and closing.

Thus, this implementation contains the electric motor and electric control, providing the ability to regulate supplied by a pump-mixer pressure even when exposed to temperatures of about 500°C. This is made possible due to the separation of electric and pneumatic control. In particular, the power circuit supplies the pressure in the cavity of the control mo is matichenkov Executive body. This power circuit includes a drain valve, the flow of which is regulated by regulating the flow area of the leak. This section of the leakage is controlled directly or indirectly by an electric motor. When the motor is not exposed to direct impact of the hostile environment in terms of temperature and pressure in the pump-mixer.

According to this variant implementation of the pump-mixer is controlled by pressure. However, nothing prevents to provide control of the temperature.

For this purpose, the pump-mixer according to the invention preferably contains a temperature sensor located at the outlet of the pump-mixer and is designed to submit measuring the temperature signal representing the temperature of the output gas; electric control unit is designed to accept a reference signal representing a reference value of temperature, which is the pump-mixer must provide at the output, and measuring the temperature signal supplied by the temperature sensor, and the electric control unit is designed in such a way as to apply to the motor command to start the process of opening/closing a discharge valve or valves so as to vary the amount pressure supplied to the control cavity so that about the ka could move in the first channel and to the pump-mixer provided at the output of the output gas from the specified reference temperature.

According to another variant, the pump-mixer may include a pressure sensor, and temperature sensor, and the control unit may generate a command as a function of temperature and pressure.

According to the invention is preferably a drain valve is a three-way valve, and his first move is connected with the discharge channel, a second passage connected with the first pressure source, and a third passage connected with the drain tank, the pressure is lower than the pressure of the first pressure source.

Such three-way valve allows you to vary the amount of pressure supplied to the cavity of the control of the Executive authority, in the range between the two pressure values.

According to the invention is preferably such three-way valve includes a valve body made with the possibility of stepless movement between a position corresponding to a fully closed position in which the first passage is in direct communication with the second passage, so that fed into the control cavity pressure is the pressure of the first pressure source, and a position corresponding to a fully open position in which the first passage is in direct communication with the third passage, so that fed into the control cavity pressure is the pressure of the discharge tank.

According to the invention preferably e is chromator done so, to prevent movement of the valve body in such a way as to provide a varying pressure supplied to the cavity of the control of the Executive authority, in the range between the pressure of the first pressure source and the pressure drain tank.

According to this variant of implementation, the position of the discharge valve is determined by the position of the valve body located within a discharge valve. The displacement of the valve body is an electric motor.

The electric motor can act on the valve body directly or indirectly, through a control circuit, or it may be part of a control circuit of a discharge valve.

Preferably the pump-mixer according to the invention comprises a control circuit of a discharge valve, and this control circuit includes the controller, containing the membrane, limiting two cavities, one cavity of the regulation is designed to supply in her pressure, called regulatory pressure, and the other cavity contains calibration calibrated spring associated with the membrane, while the equilibrium position of the membrane depends on the regulatory pressure and stiffness calibrated spring; a rigid rod connected to the diaphragm and valve body drain valve so that movement of the diaphragm causes movement of the valve body

The movement of the membrane is the result of equilibrium between the force of the calibrated spring and a pressure regulating pressure. The equilibrium position of the membrane determines the position of the valve body drain valve. The position of the valve body defines a control pressure supplied to the cavity of the control.

The controller of the pump-mixer according to the invention may be a regulator of simple or double-acting.

According to the invention is preferably a control circuit drain valve contains a pressure source, called the third pressure source; at least one channel located between the third pressure source and the cavity of the regulation and is designed to serve regulating the pressure in that cavity regulation; at least one drain valve, designed to create a leak from the channel control circuit that allows you to change the pressure applied into the cavity of the regulation.

As well as a drain valve power circuit for supplying pressure into the cavity of the control of the Executive body, blowoff valve control loop can be executed in different structural types.

According to the invention preferably blowoff valve control loop is formed by a slot in the channel and on vignau valve, opposite the hole. During this movement of the valve provides a changing regulatory pressure supplied to the cavity of the regulation.

Flow principle regulating the pressure in the cavity of the control knob in a similar way to supply the control pressure in the control cavity of the Executive body. In particular, this control circuit includes a drain valve located between the pressure source and the cavity of regulation, and this blowoff valve control loop is designed in such a way as to create a leak in the control loop, which allows to vary the amount of pressure supplied to the cavity of the regulation. Preferably this blowoff valve control loop implemented by system type nozzle/valve.

According to the invention preferably the electric motor is designed in such a way as to command the control unit to move the valve to change the pressure applied into the cavity of the control knob, thereby to prevent the opening/closing of the drain valve.

According to this preferred variant of the electric motor directly drives the valve into rotational motion. Preferably the damper is mounted on the shaft of the electric motor.

The control circuit contains a certain number ka is Alov between the third pressure source and the cavity of the regulation of the regulator. According to this variant implementation of the control circuit contains a hole made in one of the channels and blocked, at least partially specified by the flap. Moving the flap allows you to change the flow area of leakage from the control circuit and due to this change, regulating the pressure supplied to the cavity of the regulation.

According to this variant, the motor includes a shaft, on which is located the valve. The rotation of the motor shaft causes rotation of the valve that allows you to increase or decrease the flow area of this leakage and accordingly to increase or decrease the pressure applied into the cavity of the regulation.

Thus, the control discharge valve power circuit is the result of the following stages: the motor adjusts the position of the valve control loop; this change causes a change in the magnitude of the regulating pressure supplied to the cavity of the regulation; this change in pressure causes movement of the diaphragm of the regulator; the movement of the membrane causes movement associated with the membrane valve body drain valve power circuit.

The electrical control unit of the pump-mixer according to the invention is designed in such a way as to make the reference pressure and the measured pressure at the outlet of the pump-mixer, can who also produce the control commands and send them to the electric motor.

The electric motor of the pump-mixer according to the invention may be a motor of any type.

However, according to the invention preferably the motor is a torque DC motor. The management of this torque motor is particularly easy. The control unit transmits to the motor control current, which causes rotation of the shaft of the motor and, consequently, changing the flow area of the leak.

In the pump-mixer according to the invention, which contains the power circuit designed to supply pressure into the cavity of the control of the Executive body, a drain valve and a control circuit designed to control the location of the discharge valve, force and control are separated.

This separation has several advantages compared with the known pumps-mixers of the prior art. So, the Department of pneumatic control pneumatic power influences allows to obtain a control circuit with a control gas to a lower pressure than the gas pressure force of the impact, intended for submission to the Executive body cavity. This lower pressure allows the use of a simple electric motor that develops limited capacity compared to the performance in which the electric motor would have to cope with the pressure of the gas kilowog the impact served in the cavity of the Executive body. This separation also allows you to avoid exposure to fluctuations in gas pressure VD and ND circulating in the channels of the pump-mixer. In the General case, the pump-mixer according to the invention is a component of the equipment of the aircraft, and gas VD is selected from the engines of the aircraft. Accordingly, the gas VD sensitive to changes in the mode of engine operation.

The third source of pressure supply control circuit, can be a source of any type.

However, according to the invention preferably this third source of pressure control loop provided with a pressure reducing valve designed to supply a predetermined gas pressure taken at the output of the pump-mixer.

The sources of pressure, high and low pressure, which allows the three-way valve feeding into the cavity of the pneumatic control of the Executive body pressure in the range between the high and low pressure, can be sources of any type.

According to the invention preferably these sources of pressure associated with the three-way valve, are the surrounding air and gas VD.

Under this option, a source of high pressure gas is VD, and the source of low pressure surrounding air.

Pneumatic Executive body of the pump is of mesites according to the invention may be the Executive authority of any type.

Preferably this pneumatic Executive body is pneumatic Executive body of simple actions.

According to the invention preferably this pneumatic actuator body includes a housing Executive body carrying tube with a movable piston, and the housing Executive body includes means for directions free translational motion of the rolling piston, and the control cavity is limited by the housing Executive body and a movable piston; limited housing Executive body and a movable second piston cavity, opposite the control cavity and the second cavity is designed to supply in her gas VD; acting on closing spring located in the cavity of the management and designed for the transfer of the movable piston efforts, which added to the pressure supplied to the control cavity, to ensure movement of the rolling piston.

Acting on the closing spring is making a significant contribution supplied into the cavity of the control the control pressure to ensure operations movement of the rolling piston.

The pump-mixer according to the invention can be made of various shapes and sizes. The inlets of the gas supply VD and ND in the mixing chamber may also be times the ranks of shapes and sizes.

According to the invention preferably these inlet ports of the gas supply VD and ND out in the mixing chamber concentric.

For this purpose, the inlet flow channel in the mixing chamber gas VD is located inside the inlet port of the gas supply LP. The cross section of the inlet port of the gas supply OD is the ring.

This arrangement enables to reduce the size of the pump-mixer with a variable cross-section of the intake duct and promotes mixing of the gases in the mixing chamber.

According to the invention it is preferable that the inlet flow channel in the mixing chamber is made conical, and the tube is rigidly connected with a movable piston pneumatic actuator body made in the form of a conical tip, which is located inside the conical inlet of the channel.

This interaction forms allows you to change the cross section of the injection gas VD in the mixing chamber.

The pump-mixer according to the invention is intended in particular to equip the air conditioning system of the aircraft.

Thus according to the invention preferably gas VD is the high pressure air taken from the engines of the aircraft, and the specified LP gas is air pressure of the air inside the cockpit.

The invention relates also to the pump-mixer with a variable cross-section of the inlet of the second channel, which is a combination of all or part of the characteristics mentioned above or described further.

Brief description of drawings

Next, with reference to the accompanying drawings will be described in detail non-restrictive embodiments of the invention, and other features, objectives and advantages of the invention. In the drawings:

1 schematically depicts a pump-mixer according to the invention in a first example implementation,

figure 2 schematically depicts the pump-mixer in another example implementation,

figure 3 schematically depicts an Executive body and a drain valve pump-mixer, which is in the closed position,

figure 4 schematically depicts an Executive body and a drain valve pump-mixer, which is in the open position,

figure 5 schematically depicts a pump-mixer in the following example execution.

The implementation of the invention

Shown in figure 1, the pump-mixer includes a mixing gas chamber 1. In this mixing gas chamber 1 is supplied with gas under high pressure, then gas VD channel 2, which opens into the chamber 1, and a gas under low pressure, then gas LP on channel 3, which opens into the chamber 1.

From mixing of the gas chamber 1 through the exhaust channel 4 enters the output gas which is a mixture of gases VD and ND is supplied to the mixing gisovu the camera 1 to channels 2, 3. This output gas supplied through the outlet channel 4, has an intermediate pressure between ND and VD.

The pump-mixer according to the invention also includes a pneumatic actuator body 10 located in the channel 2. This pneumatic Executive body 10 includes a movable piston 11, is rigidly connected with the tube 12, the position in which the channel 2 defines the flow area for gas VD to the gas mixing chamber 1. Changing the position of the moving piston 11 causes a change in this bore. In addition, the Executive body 10 contains a cavity 13 of the movable control piston 11. In this cavity 13 of the control pressure builds in the pressure channel 14. The pressure in the cavity 13 of the control determines the position of the movable piston 11, and hence the position of the tube 12 in the channel 2. Changing the position of the tube 12 causes a change in flow area for gas flow VD to the camera 1, and hence the change in pressure of the output gas. Thus, the pressure in the cavity 13 of the control determines the pressure of the output gas.

Further, the pump-mixer according to the invention contains power pneumatic circuit 20, called power circuit 20 and connecting the pressure source, called the first source 21 of the pressure on the discharge channel 14. This power circuit 20 is designed to supply pressure, which is called the sterile managing pressure in the cavity 13 of the control pressure through the channel 14.

The power circuit 20 includes at least one drain valve 22, which is designed to create a leak from the power circuit 20 that allows you to change the pressure applied into the cavity 13 of the control of the Executive body 10.

A drain valve 22 of the power circuit 20 may be a valve of any known type. However, preferably it is proportional valve, for example a proportional three-way valve. As shown in the drawings (Fig 3 and 4), this three-way proportional valve 22 has a first passage 23 which is connected with the discharge channel 14, a second passage 24 which is connected with the first source 21 pressure, and the third passage 25, which performs the function of the descent.

This third passage 25 can go into the atmosphere around a discharge valve 22, as shown in figure 1.

According to another embodiment, shown in figure 2, this third passage 25 can be connected to the drain tank 26 under pressure below the pressure of the first pressure channel 21. This drain tank 26 performs the function of the second pressure source.

Thus, a drain valve 22 of the pump-mixer in this example, the execution may provide flow into the cavity 13 of the pneumatic control of the Executive body 10 pilot pressure which is intermediate between tablenamerow source 21 pressure and the pressure in the drain tank 26.

Control three-way drain valve 22 is preferably transmitted to the body 27 of the valve, which can be moved steplessly between a position corresponding to the position of full closure of the discharge valve 22, in which the first passage 23 is directly communicated with the second passage 24, and a position corresponding to the position of full opening of the discharge valve 22, in which the first passage 23 directly communicates with the third passage 25.

When valve 22 is in the fully closed position, is supplied into the cavity 13 of the control pressure is the pressure of the first source 21 of the pressure.

When valve 22 is in the fully open position, is supplied into the cavity 13 of the control pressure is the pressure of the drain tank 26.

When valve 22 is in an intermediate position between fully open and fully closed positions, is supplied into the cavity 13 of the control pressure is intermediate between the pressure of the first source 21 of the pressure and the discharge pressure of the tank 26.

According to a particularly preferred embodiment of the invention the movement of the body 27 of the valve drain valve 22 is controlled by the controlling circuit 40 a discharge valve 22.

This control circuit 40 a discharge valve 22 includes a pneumatic controller 31. As shown in black is the hedgehog (2), pneumatic controller 31 includes a membrane 32, forming two cavities. One of them, the cavity 33 of the regulation, is designed to supply in her pressure, called regulatory pressure, and the other cavity 34 of calibration includes calibration of the spring 35, associated with the membrane 32. The equilibrium position of the membrane 32 depends on the regulatory pressure and stiffness calibrated spring 35. The spring 35 may be a spring of any type, for example, spiral wire spring.

The controller 31 also includes a rigid rod 30 connected to the diaphragm 32 and the body 27 of the valve drain valve 22.

Thus, movement of the membrane 32 causes movement of the body 27 of the valve. Accordingly, the movement of the body 27 of the valve depends on regulating the pressure supplied to the cavity 33 of the regulation.

To accomplish this, the control circuit 40 also includes a source of pressure to the third pressure source 28, and at least one channel 15 between the third pressure source 28 and the cavity 33 of the regulation and a drain valve 41, which is designed to create a diversion from the channel 15 of the control circuit 40 that allows you to change the pressure applied into the cavity 33 of the regulation.

According to the shown on the drawings the preferred embodiment, this valve 41 of the control circuit 40 is formed by a hole 42, ispolnennym in the channel 15, and the movable valve 43 in the holes 42. Movement of the valve 43 provides for changing the flow area of the leak, and consequently, changes in regulatory pressure supplied into the cavity 33 of the regulation.

According to a preferred embodiment of the invention the movement of the valve 43 is provided with an electric motor 7.

For example, the valve 43 may be mounted on the shaft of the electric motor 7 so that the rotation shaft of the motor can provide the rotation of the valve 43, at least a few degrees, to increase or decrease the flow area of leakage in the control circuit 40.

According to a preferred embodiment of the invention, the pump-mixer also includes a control unit 8, intended for supply to the motor 7 commands to the drive movement of the valve 43. Movement of the valve 43 allows you to change the pressure applied into the cavity 33 of the control knob 31. This change in pressure causes the displacement of the membrane 32. Moving membrane 32 causes movement of the hard thrust 30. Moving hard thrust 30 causes movement of the body 27 of the valve. The movement of the body 27 of the valve allows you to change the pressure applied into the cavity 13 of the control. This change in pressure causes movement of the tube 12 in the channel 2. This movement of the tube 12 causes a change in PR is the portion of the gas VD/gas LP gas in the mixing chamber 1. This change aspect ratio causes a change in pressure of the output gas in the discharge channel 4.

The electric motor 7 is, for example, a torque motor, which can receive the DC current command from the control unit 8. The control unit is, for example, the control unit of the electric direct current, is capable of feeding a constant current in the range of a few mA to 350 mA.

The command is transmitted to the electric motor 7 unit 8 control allows you to adjust the pressure of the pump-mixer in this example implementation.

Shown in the drawings, the pump-mixer in this embodiment also includes a sensor 45 pressure, located at the output of the pump-mixer and intended for supply to the control unit 8 of the pressure signal, which represents the gas pressure at the outlet of the pump-mixer. The sensor 45 may be a sensor of any type.

In addition, the control unit 8 is designed to receive the reference signal transmitted via connection 46. This reference signal may represent the reference pressure value, which is the pump-mixer must provide at the output. The link 46 may be wired or wireless, that is, in General, it can be the relationship of any type capable of transmitting an electrical signal to the control unit.

Thus, the control unit 8 can compare is elicina pressure, transmitted by the sensor 45 pressure with the reference pressure value and to determine the control of the motor that allows the motor 7 to initiate a sequence of actions that allow you to change the output pressure of the pump-mixer.

According to the example embodiment of the invention Executive body 10 includes a housing 16, which is installed inside the piston 11, is rigidly connected with the tube 12. The housing 16 also contains tools for the direction of free translational motion of the rolling piston 11.

The Executive body also includes a cavity 13 management limited housing 16 and a movable piston 11. This cavity 13 of the control is equipped with a spring 17 acting on the movable piston 11, and the spring force is added to the pressure applied into the cavity 13 of the control pressure channel 14.

The Executive body also includes a second cavity 18 located opposite the cavity 13 of the control relative to the rolling piston 11. This second cavity 18 is designed to supply the gas pressure VD.

Thus, the position of the piston 11 depends on the pressure in the cavity 13 of the control, by the stiffness of the spring 17 and the gas pressure VD in the second cavity 18.

Figure 3 and 4 show two examples of the relationship between the position of the body 27 of the valve discharge valve 22 and the position of the rolling piston 11 Executive what about the body 10.

Figure 3 the body 27 of the valve is in the position at which the pressure in the channel 14 is fed directly to the high pressure from a source 21 of the pressure. Accordingly, in the cavity 13 of the control fed a high pressure. A movable piston 11 is in the fully extended position. The tube 12 is maximally reduces the flow area for gas HP gas in the mixing chamber 1, which reduces the gas pressure at the outlet of the pump-mixer.

In figure 4 the body 27 of the valve is in the position in which leakage or descent maximum. Accordingly, the pressure in the cavity 13 of the control is minimal. The pressure difference between the pressure in the cavity 13 of the control, on the one hand, and the pressure in the second cavity 18, complemented by a dynamic pressure tube 12, on the other hand, moves the movable piston 11 in the fully stenothoe position. Accordingly, the tube 12 is moved to a position in which the flow area for gas VD to the gas mixing chamber is maximum. Thus, the gas pressure at the output is increased.

Channel 2 and the tube 12 can be made in different types.

According to the shown on the drawings the preferred embodiment, the inlet channel 2 gas mixing chamber 1 is made conical, and the stopper 12 is a conical tip, which is held in the channel 2 is so the moving tube steplessly changes the flow area for gas HP gas in the mixing chamber 1.

The pump-mixer according to the invention allows to mix different gases at different pressures.

The pump-mixer according to the invention is intended in particular to equip the air conditioning system in the plane. In this case, the gas VD is high pressure air taken from the engines of the aircraft, and the LP gas is air taken from the cockpit.

However, there are also other sources of air power pump-mixer according to the invention.

First, second and third sources of pressure can also be sources of any type.

According to a preferred embodiment of the invention, the first pressure source is channel 2, in which circulates the gas VD, the second pressure source is ambient air near the pump-mixer, and the third pressure source is a gas mixture at the outlet of the pump-mixer.

This third source of pressure is preferred. As shown in figure 5, it is obtained using the pressure reducing valve 48, designed to supply constant pressure from the gas outlet of the pump-mixer. This pressure reducing valve 48 may be implemented using any known means for feeding low on the means from the source of high or medium pressure.

The pump-mixer according to the invention can be performed in many undescribed variants.

In particular, the pump-mixer according to the invention can contain multiple drain valves and many motors to control these drain valves.

The pump-mixer according to the invention allows the precise control of output pressure. In particular, the pump-mixer according to the invention allows to provide a constant outlet pressure of the pump-mixer from two sources intermittent pressure.

Thus, the pump-mixer allows air sampling VD engine that allows you to limit excessive fuel consumption. In addition, in the case where the pump-mixer is designed to equip the air conditioning system, it allows to reduce the size of the pre-cooling device, usually located between the engines of the aircraft and the primary heat exchanger.

The pump-mixer according to the invention also allows you to increase the power of the engines of the aircraft, because the extraction of the air from them is limited in a pump-mixer.

The pump-mixer according to the invention allows also to increase the service life of aircraft engines due to the temperature reduction caused by the reduction of air sampling, which provides such a pump-mixer.

The pump-mixer according to the invention allows yet also reducing the weight of the pneumatic valve due to the higher pressure, during idling of the engines of the aircraft.

1. Gas, in particular air, the pump-mixer with a variable cross-section of the intake channel containing gas mixing chamber (1), which leads to a mixing chamber (1) a first inlet channel (2) filing in the mixing chamber (1) high pressure gas (gas VD) under the first pressure opening in the mixing chamber (1) a second inlet channel (3) submission to the mixing chamber (1) low pressure gas (LP gas) under a second pressure, different from the first pressure associated with the mixing chamber (1) outlet 4) for the release of the mixing chamber (1) mixed output gas having the intermediate pressure between the first and second pressures, depending on the proportions of the gases VD and ND is supplied to the mixing chamber (1), pneumatic Executive body (10), located in the first intake channel (2) gas supply VD, containing a movable piston (11)rigidly connected with the tube (12), the position in which the first inlet channel (2) defines the flow area for gas VD to the mixing chamber (1), and changing the position of the piston (11) causes a change in this bore; a cavity (13) control of a movable piston (11), which served the pressure in the discharge channel (14), and the pressure in the cavity (13) control determines the position of the ACC is the author of the piston (11); pneumatic power circuit (20)which is located between the first source (21) of the pressure and the discharge channel (14), and a power circuit (20) is arranged to supply the control pressure in the cavity (13) of the control pressure channel (14), characterized in that the power circuit (20) includes at least one discharge valve (22)located between the first source (21) of the pressure and the discharge channel (14), made with the possibility of creating a leak in the power circuit (20) with adjustable flow leakage, the value of which determines the pressure applied into the cavity (13) of the pneumatic control of the Executive body (10), while the pump-mixer also contains the electric motor (7), is designed to prevent the movement of a discharge valve (22) between a fully open position corresponding to the maximum opening of the discharge valve (22), and a fully closed position in which the pressure supplied to the control cavity, is the pressure of the first pressure source, a sensor (45) pressure, located at the output of the pump-mixer and executed with a possibility of measuring pressure signal representing the pressure the output gas, electric unit (8) controls made with the possibility of receiving a reference signal representing a reference value of the pressure, which the pump-compounds the tel must create output and measuring the pressure signal supplied by the sensor (45) pressure and electric unit (8) controls are designed to feed the electric motor (7) command to start the process of opening/closing a discharge valve or valves (22) for changing the amount of pressure supplied to the cavity (13) of the control, so that the tube (12) can move in the first channel (2) and to the pump-mixer provided at the output of the output gas under specified reference pressure.

2. The pump-mixer according to claim 1, characterized in that the discharge valve (22) is proportional valve made with the possibility of stepless movement between a fully open position corresponding to the maximum opening of the discharge valve (22), and a fully closed position corresponding to the maximum closing a discharge valve (22), thus to provide a stepless change of the flow rate of the leak.

3. The pump-mixer according to claim 1 or 2, characterized in that it contains a temperature sensor located at the outlet of the pump-mixer and executed with a possibility of measuring the temperature signal representing the temperature of the output gas; electric unit (8) controls made with the possibility of receiving a reference signal representing a reference value of temperature, which pump-compounds the tel must create output and measuring the temperature signal supplied by the temperature sensor, and electric unit (8) controls are designed to feed the electric motor (7) command to start the process of opening/closing a discharge valve or valves (22) for changing the amount of pressure supplied to the cavity (13) of the control, so that the tube (12) can move in the first channel (2) and to the pump-mixer provided at the output of the output gas from the specified reference temperature.

4. The pump-mixer according to claim 1 or 2, characterized in that the discharge valve (22) is the three-way valve, with his first stroke (23) is connected with the discharge channel (14), a second passage (24) is connected with the first source (21) pressure, and a third passage (25) is connected with the drain tank (26), in which pressure below the pressure of the first source (21) pressure.

5. The pump-mixer according to claim 4, characterized in that the three-way valve (22) includes a body (27) of the valve is made with the possibility of stepless movement between a position corresponding to a fully closed position in which the first passage (23) is in direct communication with the second passage (24), so that fed into the cavity (13) of the control pressure is the pressure of the first source (21) pressure, and a position corresponding to a fully open position in which the first passage (23) is in direct is m message with the third stroke (25), so fed into the cavity (13) of the control pressure is the pressure of the drain tank (26).

6. The pump-mixer according to claim 5, characterized in that the electric motor (7) is designed in such a way as to prevent the movement of the body (27) of the valve to change the pressure supplied to the cavity (13) of the control of the Executive body (10), in the range between the first pressure source (21) pressure and pressure drain tank (26).

7. The pump-mixer according to claim 5 or 6, characterized in that it contains a control circuit (40) drain valve (22), and that a control circuit (40) includes a controller (31) with a membrane (32), limiting two cavities, one cavity (33) of the regulation is designed to supply in her regulatory pressure, and the other cavity (34) calibration contains a calibrated spring (35)associated with the membrane (32), with the equilibrium position of the membrane (32) depends on the regulatory pressure and stiffness calibrated spring (35); rigid rod (30)connected to the membrane (32) and the body (27) of the valve drain valve (22) so that the movement of the membrane (32) causes the movement of the body (27) of the valve.

8. The pump-mixer according to claim 7, characterized in that a control circuit (40) includes a third source (28) pressure; at least one channel (15)located between the third source (28) of the pressure and the cavity (33) maintains the cation and executed with a possibility of regulating the pressure in the cavity (33) of the regulation; a drain valve (41)is made with the possibility of creating leakage out of the channel (15) of the control circuit (40) for changing the pressure supplied to the cavity (33) of the regulation.

9. The pump-mixer according to claim 8, characterized in that the discharge valve (41) of the control circuit (40) is formed by a hole (42), is performed in the channel (15), and a movable flap (43)opposite the opening (42).

10. The pump-mixer according to claim 9, characterized in that the electric motor (7) is designed in such a way that the command block (8) control to move the valve (43) with the change of pressure supplied to the cavity (33) of regulation controller (31)for opening/closing a discharge valve (22) of the power circuit (20).

11. The pump-mixer according to any one of p-10, characterized in that the third source (28) of the pressure control circuit (40) is provided with a pressure reducing valve (48)designed to supply a predetermined gas pressure taken at the output of the pump-mixer.

12. The pump-mixer according to any one of p-10, characterized in that the first source (21) of the pressure associated with a three-way drain valve (22), VD is the gas.

13. The pump-mixer according to claim 1 or 2, characterized in that the pneumatic actuator body (10) includes a housing (16) of the Executive body, which is installed inside a movable piston (11), and this case is ispolnitelnogo body includes means for directions free translational motion of the rolling piston (11), moreover, the said cavity (13) of the control is limited to the case of the Executive body and a movable piston; limited housing (16) of the Executive body and a movable piston (11) the second cavity (18)opposite to the cavity (13) of the administration and the second cavity (18) is designed to supply in her gas VD; valid on the closing spring (17)located in the cavity (13) of control and destined for transmission to the movable piston (11) efforts, which added to the pressure supplied to the cavity (13) management, to ensure the movement of the rolling piston (11).

14. The pump-mixer according to claim 1 or 2, characterized in that the channels (2, 3) gas supply VD and gas ND out concentrically in the mixing chamber (1).

15. The pump-mixer according to claim 1 or 2, characterized in that the gas VD is the high pressure air taken from the engines of the aircraft, and the LP gas is air pressure of the air inside the cockpit.

16. The pump-mixer according to claim 1 or 2, characterized in that the first inlet channel (2) filing in the mixing chamber (1) is made conical, and the stopper (12) is made in the form of a conical tip, which is located inside the first inlet channel (2).

17. The pump-mixer according to claim 1 or 2, characterized in that the electric motor is torque DC motor.



 

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EFFECT: enhanced precision.

1 dwg

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