An ultrasonic motor exhaust valve and a cabin pressure regulating system

Abstract

The present application belongs to the field of aviation technology, and particularly relates to an ultrasonic motor exhaust valve and a cabin pressure regulating system, which mainly include an ultrasonic motor assembly; a first plate valve shaft connected to the ultrasonic motor assembly; a second plate valve shaft connected to the ultrasonic motor assembly through a connecting rod assembly; wherein the first plate valve shaft is fastened to the first plate valve and the second plate valve shaft is fastened to the second plate valve, the first plate valve and the second plate valve have a plate valve shell to reduce the weight of the plate valve, the small size of the ultrasonic motor and the stepped transmission shaft structure can realize the valve with a redundant ultrasonic motor assembly, greatly reducing the failure rate of the valve, and the cabin pressure regulating system can automatically adjust the cabin pressure according to the strong anti-interference performance of the ultrasonic motor, which is safe and reliable.

Description

Technical Field

[0001] The present application belongs to the field of aviation technology, and in particular relates to an ultrasonic motor exhaust valve. Background Art

[0002] The cabin pressure regulation system is used in the aircraft's airtight cabin. According to the given cabin pressure system, the cabin pressure controller sends out a command signal to control the cabin exhaust volume by adjusting the opening of the exhaust valve, ultimately achieving the purpose of controlling the cabin pressure and the cabin pressure change rate. Under the premise of ensuring the safety of the aircraft structure, it provides the cabin occupants with a comfortable cabin pressure environment to the maximum extent.

[0003] The exhaust valve is an important part of the aircraft cabin pressure regulation system. Due to control accuracy and installation considerations, more and more large aircraft are using plate valves as exhaust valves in their designs. At present, exhaust valves are all actuators, and the opening of the valve is controlled by the cabin pressure controller. The cabin pressure controller on the aircraft is generally integrated with other controllers. If the failure of other controllers affects the failure of the cabin pressure controller, the exhaust valve will lose control, which will endanger the flight safety of the aircraft. In addition, motors are used on aircraft to drive the opening of the exhaust valve. Traditional motor components are usually composed of electric actuators and reducers. The structure is not only complex, but also increases the volume and weight of the exhaust valve. Summary of the invention

[0004] In order to solve the above problems, the present application provides an ultrasonic motor exhaust valve and a cabin pressure regulating system, comprising:

[0005] Ultrasonic motor components;

[0006] A first plate-type valve shaft connected to the ultrasonic motor assembly;

[0007] A second plate-type valve shaft connected to the ultrasonic motor assembly via a connecting rod assembly;

[0008] The first plate valve shaft is fastened to the first plate valve and the second plate valve shaft is fastened to the second plate valve. The first plate valve and the second plate valve have plate valve housings.

[0009] Preferably, the ultrasonic motor assembly includes a first ultrasonic motor, a second ultrasonic motor and a third ultrasonic motor; the output shafts of the first ultrasonic motor, the second ultrasonic motor and the third ultrasonic motor are three independently working and concentric rings, and the rings are distributed in a stepped manner with different heights, and the connection between the first plate valve shaft and the ultrasonic motor assembly has an integrated stepped connecting platform matching the rings.

[0010] Preferably, the connecting rod assembly is a quadrilateral mechanism.

[0011] Preferably, the quadrilateral mechanism is a parallelogram, so that the movements of the first plate valve shaft and the second plate valve shaft are consistent.

[0012] Preferably, the output shaft is meshed with the connecting platform via a tooth groove or a key groove.

[0013] Preferably, each of the output shafts has independent axial freedom and axial rotational freedom.

[0014] A cabin pressure regulating system includes the ultrasonic motor exhaust valve, and also includes a control component, a cabin pressure sensor and an avionics system; the control component is respectively connected to the cabin pressure sensor, the avionics system and the ultrasonic motor component, the signal of the cabin pressure sensor and the avionics system is fed back to the control component, the control component controls the ultrasonic motor component based on the signal, and the ultrasonic motor component controls the redundant plate-type exhaust valve; wherein the ultrasonic motor component and the redundant plate-type exhaust valve both have a feedback circuit connected to the control component.

[0015] Preferably, the cabin pressure regulating system further comprises a cabin pressure control panel, wherein the cabin pressure control panel comprises an artificial circuit and an automatic circuit, wherein the artificial circuit is connected to the ultrasonic motor component, and the automatic circuit is connected to the control component.

[0016] The advantages of the present application include: reducing the weight of the plate-type valve, the small size of the ultrasonic motor and the stepped transmission shaft structure, which can enable the valve to have a redundant ultrasonic motor component, thereby greatly reducing the failure rate of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a structural diagram of an ultrasonic motor exhaust valve.

[0018] Figure 2 It is a cross-sectional schematic diagram of the redundant output shaft of the ultrasonic motor.

[0019] Figure 3 This is a schematic diagram of the cabin pressure regulation system.

[0020] Among them: 1-ultrasonic motor assembly, 2-first plate valve shaft, 3-first plate valve, 4-second plate valve shaft, 5-second plate valve, 6-plate valve housing, 7 connecting rod assembly, 11-first ultrasonic motor, 12-second ultrasonic motor, 13-third ultrasonic motor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the implementation of this application clearer, the technical scheme in the implementation of this application will be described in more detail in combination with the drawings in the implementation of this application. In the drawings, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The described implementation is a part of the implementation of this application, not all of the implementations. The implementation described below with reference to the drawings is exemplary and is intended to be used to explain this application, and cannot be understood as a limitation on this application. Based on the implementation in this application, all other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The implementation of this application is described in detail below in combination with the drawings.

[0022] The ultrasonic motor of the present application does not use electromagnetic cross force to obtain its motion and torque like traditional motors. The ultrasonic motor uses the inverse piezoelectric effect and ultrasonic vibration of piezoelectric ceramics to obtain its motion and torque, and converts the microscopic deformation of the material into the macroscopic motion of the rotor through mechanical resonance amplification and friction coupling. In this motor, the piezoelectric ceramic material disk replaces many copper coils. Compared with traditional motors, this motor can output a large torque without a reducer or transmission mechanism, and has the advantages of simple structure, small and light weight, fast response speed, low noise, large torque, and low speed.

[0023] This application adopts the above ultrasonic motor to invent the following device: Figure 1 Figure 2 The invention mainly comprises: an ultrasonic motor assembly; a first plate-type valve shaft connected to the ultrasonic motor assembly; a second plate-type valve shaft connected to the ultrasonic motor assembly through a connecting rod assembly;

[0024] The first plate valve shaft is fastened to the first plate valve and the second plate valve shaft is fastened to the second plate valve. The first plate valve and the second plate valve have plate valve housings.

[0025] The ultrasonic motor assembly comprises a first ultrasonic motor, a second ultrasonic motor and a third ultrasonic motor; the output shafts of the first ultrasonic motor, the second ultrasonic motor and the third ultrasonic motor are three independently working and concentric circular rings, the circular rings are distributed in a stepped manner with different heights, and the connection between the first plate valve shaft and the ultrasonic motor assembly has an integrated stepped connection platform matching the circular rings,

[0026] The top of the first plate valve shaft, that is, the side close to the ultrasonic motor assembly, is stepped, which is convenient for multiple ultrasonic motors to control the shaft separately.

[0027] The ultrasonic motor assembly directly drives the first plate valve shaft to rotate to control the opening of the first plate valve. There is a small gap between the first plate valve shaft and the ultrasonic motor assembly. If you want to use the first ultrasonic motor to control the movement of the plate valve, you can attract the step-type structure on the first plate valve shaft corresponding to the first ultrasonic motor.

[0028] The ultrasonic motor assembly indirectly drives the second plate valve shaft to rotate through the connecting rod assembly to control the opening of the second plate valve. The connecting rod assembly is a key component to achieve the same rotation speed of the first plate valve shaft and the second plate valve shaft. The lengths of the rods in the connecting rod assembly that are in contact with the first plate valve shaft and the second plate valve shaft are equal.

[0029] The first plate valve and the second plate valve move synchronously.

[0030] The ultrasonic motor assembly includes three ultrasonic motors, namely, a first ultrasonic motor, a second ultrasonic motor and a third ultrasonic motor, and the three ultrasonic motors are backed up for each other. If one of the ultrasonic motors is damaged, the first plate valve shaft can move by attracting other ultrasonic motors.

[0031] A cabin pressure regulating system, such as Figure 3 As shown, it includes a cabin pressure control panel, a positive pressure safety valve, a negative pressure safety valve, an exhaust valve, and a cabin pressure sensor.

[0032] The cabin pressure control panel consists of a mode selector switch, a landing airport altitude corrector, and a manual exhaust valve opening control switch.

[0033] When the actual pressure altitude of the landing airport is slightly different from that displayed by the avionics system, or the avionics system cannot transmit the landing airport altitude to the exhaust valve, the landing airport altitude corrector can be used for correction or data input. The correction range of the landing airport altitude corrector can be set as follows:

[0034] -300m to 4200m.

[0035] The mode selection switch has two gears: manual and automatic. The mode switch is used to select whether the cabin pressure regulation system is in manual control mode or automatic control mode. If the manual control mode is selected on the cabin pressure control panel, the exhaust valve opening can be manually controlled by adjusting the exhaust valve opening manual control switch to directly control the exhaust valve ultrasonic motor and manually adjust the exhaust valve opening. If the automatic control mode is selected, the control component inside the exhaust valve will calculate according to the cabin pressure, external atmospheric pressure, aircraft climb speed, etc., according to the designed cabin pressure system, and autonomously control the valve opening.

[0036] Due to the control accuracy and installation considerations, the exhaust valve uses a plate valve as the exhaust valve. The exhaust valve integrates the plate exhaust valve with the cabin pressure controller.

[0037] The ultrasonic motor assembly includes three ultrasonic motors, a grating position sensor, and an isolated pole feedback circuit, two of which are used in the system automatic control mode, and one ultrasonic motor is used in the system manual control mode.

[0038] The control unit can adjust the cabin pressure according to the following specifications: The national military standard stipulates that the cabin pressure change rate is that the pressurization rate does not exceed 0.67kPa / s, and the decompression rate does not exceed 1.33kPa / s. According to the use requirements of civil aircraft, the aircraft cabin begins to be airtight on the ground, the cabin altitude does not exceed 2400m, and the cabin pressure change rate design value is the pressurization rate of 91m / min (equivalent to 1.09kPa / min at sea level) and the decompression rate of 152m / min (equivalent to 1.83kPa / min at sea level).

[0039] The control unit has two control channels, each of which controls an ultrasonic motor in the ultrasonic motor unit. When one control channel is working, the other control channel is in hot standby mode to monitor the operation of the working control channel. When the cabin pressure regulation system selects the automatic mode, the control unit of the exhaust valve starts to work. If the working control unit fails, the standby control unit will control the opening of the valve and report the fault information.

[0040] The control component selects the control of the ultrasonic motor based on fuzzy control and neural network methods. The control component can select three ways to control the speed of the ultrasonic motor: 1) adjust the voltage of the driver output signal; 2) adjust the frequency of the driver output signal; 3) adjust the phase difference between the two-phase output signals of the driver.

[0041] According to the data of ultrasonic motor driven mechanical arms: the Φ60mm motor can reach a stable value within 0.3s, and there is an oscillation of about 0.2s, and the Φ100mm motor can reach a stable value within 0.8s, and the oscillation is relatively small. In order to ensure reliable and stable operation of the ultrasonic motor, the control component must detect the operating status of the ultrasonic motor, adopt closed-loop control, and adjust the drive frequency to keep the ultrasonic motor running in a stable working state. The grating position sensor and the solitary pole feedback circuit are installed on the ultrasonic motor to feed back the angle of the motor and the position of the motor to the control component, forming a closed-loop regulation circuit to achieve precise positioning control of the valve.

[0042] The exhaust angle of the exhaust valve can be controlled by referring to the following formula:

[0043] like but

[0044]

[0045] like but

[0046]

[0047] The exhaust valve rotation angle α is

[0048]

[0049] In the formula, G k -Cabin air flow, V c - Cabin volume, dP c -Cabin pressure change, dτ -unit time, A B -Valve flow area, μ B -Speed ​​loss coefficient, P c -Cabin pressure, T c - Cabin temperature, P h -Ambient pressure, A-total area of ​​valve plate, α-valve rotation angle, R-gas constant

[0050] The exhaust valve transmits the opening information of the valve assembly to the avionics system, and the avionics system displays the opening of the exhaust valve on the aircraft's main display for the pilot to observe.

[0051] The cabin pressure sensor is used to detect the pressure in the cabin and transmit the pressure value to the exhaust valve control component. Multiple cabin pressure sensors can be arranged in the aircraft cabin to make the measured cabin pressure more realistic and avoid system failure caused by cabin pressure sensor failure.

[0052] When all control channels of the cabin pressure regulation system fail, the positive pressure safety valve and the negative pressure safety valve can ensure that the aircraft fuselage is not damaged. When the pressure difference between the cabin and the outside atmospheric pressure exceeds the specified value or negative pressure occurs, the positive pressure safety valve or the negative pressure safety valve will open to protect the aircraft structure.

[0053] The system has a fault self-check function, and the aircraft can perform system self-check at any time during flight.

[0054] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. An ultrasonic motor exhaust valve, characterized in that: include: Ultrasonic motor assembly (1); A first plate-type valve shaft (2) connected to the ultrasonic motor assembly (1); A second plate-type valve shaft (4) connected to the ultrasonic motor assembly (1) via a connecting rod assembly (7); The first plate valve shaft (2) is firmly connected to the first plate valve (3), the second plate valve shaft (4) is firmly connected to the second plate valve (5), and the first plate valve (3) and the second plate valve (5) are inside the plate valve housing (6); The ultrasonic motor assembly (1) comprises a first ultrasonic motor (11), a second ultrasonic motor (12) and a third ultrasonic motor (13); the output shafts of the first ultrasonic motor (11), the second ultrasonic motor (12) and the third ultrasonic motor (13) are three independently working and concentric circular rings, the circular rings are distributed in a stepped manner with different heights, and the connection between the first plate valve shaft (2) and the ultrasonic motor assembly (1) is provided with an integrated stepped connection platform matching the circular rings.

2. An ultrasonic motor exhaust valve as claimed in claim 1, characterized in that: The connecting rod assembly (7) is a quadrilateral mechanism.

3. An ultrasonic motor exhaust valve as claimed in claim 2, characterized in that: The quadrilateral mechanism is a parallelogram, so that the first plate valve shaft (2) and the second plate valve shaft (4) move in the same manner.

4. An ultrasonic motor exhaust valve as claimed in claim 1, characterized in that: The output shaft is meshed with the connecting platform via a tooth groove or a key groove.

5. The ultrasonic motor exhaust valve according to claim 1, characterized in that: Each of the output shafts has independent axial freedom and axial rotational freedom.

6. A cabin pressure regulating system, characterized in that: The ultrasonic motor exhaust valve comprises the ultrasonic motor exhaust valve as described in any one of claims 1 to 5, and also comprises a control component, a cabin pressure sensor and an avionics system; the control component is respectively connected to the cabin pressure sensor, the avionics system and the ultrasonic motor component (1), the signals of the cabin pressure sensor and the avionics system are fed back to the control component, the control component controls the ultrasonic motor component (1) based on the signal, and the ultrasonic motor component (1) controls the redundant plate-type exhaust valve; wherein the ultrasonic motor component (1) and the redundant plate-type exhaust valve both have a feedback circuit connected to the control component.

7. The cabin pressure regulating system according to claim 6, characterized in that: The cabin pressure regulating system also has a cabin pressure control panel, which includes a manual circuit and an automatic circuit, wherein the manual circuit is connected to the ultrasonic motor component (1), and the automatic circuit is connected to the control component.

Images