High-temperature-resistant high-precision servo control air conditioning device

Abstract

The invention provides a high-temperature-resistant high-precision servo control air conditioning device which comprises an integrated control execution unit, and the integrated control execution unit comprises an electro-hydraulic servo valve, an actuator cylinder, a displacement sensor and a valve assembly. A piston and a rotating shaft are arranged in the actuating cylinder, and oil cavities are formed in the two sides of the piston. The electro-hydraulic servo valve is used for converting electric signals into hydraulic signals, and a first output oil port and a second output oil port of the electro-hydraulic servo valve communicate with the oil cavities in the two sides of the piston correspondingly. And the displacement sensor is used for feeding back the real-time position of the piston to facilitate closed-loop control. The valve assembly is used for adjusting the outlet flow of a load compressor and a turbine of the power device. According to the high-temperature-resistant high-precision servo control air conditioning device, the overall space occupation and weight of the device can be reduced, the response speed of the device is increased, the adjusting precision of the device is improved, and therefore the multiple use requirements of surge prevention, ice prevention, cooling and the like are met.

Description

Technical Field

[0001] The invention belongs to the field of aircraft engine control system structure design, and in particular relates to a high-temperature resistant and high-precision servo-controlled air conditioning device. Background Art

[0002] With the urgent demand for the flight altitude, flight speed and combat performance of aircraft, it is very necessary to improve the efficiency of aircraft engines, reduce power consumption, reduce weight and improve temperature resistance.

[0003] At present, the air conditioning devices of aircraft engines generally adopt a split system architecture design with a servo valve as the control part and an actuator and an air valve as the execution part. This architecture design not only leads to an increase in the number of mechanical interfaces and pipelines in the system, affecting the overall installation layout and weight of the aircraft engine, but also has the defects of a small decompression range and a single function, and therefore cannot meet actual use needs. Summary of the invention

[0004] In view of this, the present invention aims to provide a high-temperature resistant and high-precision servo-controlled air conditioning device to solve the above technical problems.

[0005] To achieve the above object, the technical solution created by the present invention is implemented as follows:

[0006] A high-temperature resistant and high-precision servo-controlled air conditioning device comprises an integrated control execution unit, the integrated control execution unit comprises: an electro-hydraulic servo valve, an actuator, a displacement sensor and a valve assembly; a piston and a rotating shaft connected to the piston through a rocker arm are arranged inside the actuator, and oil chambers are arranged on both sides of the piston; the electro-hydraulic servo valve is used to convert an electrical signal into a hydraulic signal, and a first output oil port and a second output oil port of the electro-hydraulic servo valve are respectively connected to the oil chambers on both sides of the piston, so that the piston moves under the pressure difference of the oil chambers on both sides, and the rotating shaft is driven to rotate through the rocker arm; the displacement sensor is arranged on the actuator, and the displacement sensor is used to feedback the real-time position of the piston for closed-loop control; the valve assembly is used to adjust the outlet flow of the load compressor and turbine of the power unit, and the valve assembly comprises: a cylinder, a butterfly plate and a drive shaft, the drive shaft is rotatably arranged inside the cylinder, the butterfly plate is detachably arranged on the drive shaft, and the top of the drive shaft is connected to the rotating shaft.

[0007] Furthermore, the butterfly plate is provided with an assembly sleeve for accommodating the drive shaft, a assembling hole is provided on the side wall of the assembly sleeve, an assembly bolt is provided inside the assembly hole, and a bolt hole for accommodating the assembly bolt is provided on the side wall of the drive shaft.

[0008] Furthermore, a plurality of reinforcing ribs connected to the end surface of the butterfly plate are provided on the outer side wall of the assembly sleeve.

[0009] Furthermore, a sealing groove is provided on the outer side wall of the butterfly plate, and a sealing strip is provided inside the sealing groove.

[0010] Furthermore, the angle formed between the axis of the drive shaft and the axis of the cylinder is less than 90°, the butterfly plate is perpendicular to the axis of the cylinder, and an adjusting washer for adjusting the axial position of the butterfly plate is provided on the drive shaft.

[0011] Furthermore, a high temperature resistant coating is provided inside the cylinder, and a high temperature sealing assembly is provided on the driving shaft.

[0012] Furthermore, the electro-hydraulic servo valve is a jet deflection plate type electro-hydraulic servo valve.

[0013] Compared with the prior art, the high-temperature resistant and high-precision servo-controlled air conditioning device created by the present invention has the following advantages:

[0014] The invention creates a high-temperature resistant and high-precision servo-controlled air conditioning device that can integrate the electro-hydraulic servo valve, actuator, displacement sensor and valve assembly. Compared with the common split system architecture design, it can reduce the connection of pipelines, thereby reducing the overall space occupancy and weight. Secondly, the device can achieve high-precision closed-loop control through the electro-hydraulic servo valve and displacement sensor, thereby improving the response speed and adjustment accuracy of the air conditioning device, and conveniently meeting the functional requirements of anti-surge, anti-icing and cooling during actual use. In addition, the device is provided with a high-temperature resistant coating and a high-temperature sealing component, so it has good high-temperature resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of a high-temperature resistant and high-precision servo-controlled air conditioning device according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of the structure of the actuator described in the embodiment of the present invention;

[0018] Figure 3 An exploded view of the valve assembly according to an embodiment of the present invention;

[0019] Figure 4 A cut-away internal view of a valve assembly according to an embodiment of the present invention.

[0020] Description of reference numerals:

[0021] 1-electro-hydraulic servo valve; 2-actuator cylinder; 21-piston; 22-rocker arm; 23-rotating shaft; 3-displacement sensor; 41-cylinder body; 42-butterfly plate; 421-sealing groove; 43-driving shaft; 431-bolt hole; 432-adjusting gasket; 44-assembly sleeve; 441-assembly bolt; 442-reinforcement rib; 45-sealing strip; 46-high-temperature sealing assembly. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] A high-temperature resistant and high-precision servo-controlled air conditioning device, comprising: Figure 1The integrated control execution unit shown. In this embodiment, the integrated control execution unit includes: an electro-hydraulic servo valve 1, an actuator 2 and a valve assembly, wherein the electro-hydraulic servo valve 1 is used to convert an electrical signal into a hydraulic signal, the actuator 2 is used to respond to the hydraulic signal and output torque to the valve assembly, and the valve assembly is used to receive the torque output by the actuator 2, thereby adjusting the outlet flow of the power unit load compressor and turbine to meet the functional requirements of anti-surge, anti-icing and cooling during actual use.

[0027] Specifically, Figure 1 , Figure 2 and Figure 4 As shown, the actuator 2 is provided with a piston 21 and a rotating shaft 23 connected to the piston 21 through a rocker arm 22, and oil chambers are provided on both sides of the piston 21. The valve assembly should include: a cylinder 41, a butterfly plate 42 and a drive shaft 43, wherein the drive shaft 43 is rotatably arranged inside the cylinder 41, the butterfly plate 42 is detachably arranged on the drive shaft 43, and the top of the drive shaft 43 is connected to the rotating shaft 23. During assembly, the electro-hydraulic servo valve 1 should introduce fuel from the aircraft engine, and the first and second output oil ports of the electro-hydraulic servo valve 1 should be connected to the oil chambers on both sides of the piston 21 respectively, and the cylinder 41 should be connected to the gas path conversion mechanism, and the cold air is introduced into the preset cooling position through the gas path conversion mechanism, so as to realize the correct guidance of the airflow. During operation, the piston 21 will move under the pressure difference of the oil chambers on both sides, and the rocker arm 22 can drive the rotating shaft 23 to rotate, thereby generating torque output. The drive shaft 43 can drive the butterfly plate 42 to rotate after receiving the torque output by the rotating shaft 23, thereby adjusting the internal opening of the valve assembly to accurately control the flow of cold air and meet the actual use requirements of subsequent equipment.

[0028] It should be noted that the electro-hydraulic servo valve 1 in this embodiment can be a jet deflection plate type electro-hydraulic servo valve, so that the device can obtain good response frequency, stability and linearity. The jet deflection plate type electro-hydraulic servo valve is a common electro-hydraulic servo valve, which usually includes: a torque motor assembly, a filter assembly, a slide valve assembly and a housing, etc. Since its composition structure and working principle are already well known to those skilled in the art, they are not described in detail in this application.

[0029] In addition, in order to improve the response speed and adjustment accuracy of the device, the integrated control execution unit also includes a displacement sensor 3 for feedback of the real-time position of the piston 21 so as to facilitate closed-loop control of the device, and the displacement sensor 3 should be arranged on the actuator 2. In this embodiment, the displacement sensor 3 may include an angular displacement sensor and a linear displacement sensor. When in use, the feedback signal of the angular displacement sensor is related to the displacement of the piston 21 in the actuator 2, and the feedback signal of the linear displacement sensor can be superimposed with the input signal, thereby controlling the torque motor in the electro-hydraulic servo valve 1 to return to the neutral position, so that the electro-hydraulic servo valve 1 has no flow output. Correspondingly, at this time, the actuator 2 will stop moving, so that the butterfly plate 42 in the valve assembly can stay at a fixed angle, ensuring that the valve assembly has good opening adjustment accuracy.

[0030] Figure 3 The exploded view of the valve assembly in the device is shown in the figure. To realize the assembly between the butterfly plate 42 and the drive shaft 43, a mounting sleeve 44 for accommodating the drive shaft 43 may be provided on the butterfly plate 42, and a mounting hole should be provided on the side wall of the mounting sleeve 44. An assembly bolt 441 should be provided inside the assembly hole, and a bolt hole 431 for accommodating the assembly bolt 441 is provided on the side wall of the drive shaft 43, so that the position of the butterfly plate 42 is fixed by the cooperation of the assembly bolt 441 and the bolt hole 431.

[0031] As an optional method of this embodiment, in order to improve the structural strength of the butterfly plate 42, a plurality of reinforcing ribs 442 connected to the end face of the butterfly plate 42 may be provided on the outer wall of the mounting sleeve 44 to facilitate the butterfly plate 42 to adapt to the high-pressure working environment.

[0032] Optionally, in order to improve the sealing effect between the butterfly plate 42 and the cylinder 41, a sealing groove 421 may be further provided on the outer wall of the butterfly plate 42, and a sealing strip 45 may be provided inside the sealing groove 421, so that the gap between the butterfly plate 42 and the cylinder 41 can be sealed with the help of the sealing strip 45.

[0033] like Figure 4 As shown, in this embodiment, the angle formed between the axis of the drive shaft 43 and the axis of the cylinder 41 should be less than 90°. After the assembly of the components in the valve assembly is completed, the butterfly plate 42 should be perpendicular to the axis of the cylinder 41, so that the butterfly plate 42 can form a good on-off control effect on the inside of the cylinder 41. Accordingly, in order to facilitate the adjustment of the position of the butterfly plate 42 along the axis direction of the drive shaft 43, an adjustment washer 432 can be provided on the drive shaft 43. During the assembly process, the staff can make the butterfly plate 42 stay at a suitable position on the drive shaft 43 by adding or removing the adjustment washer 432.

[0034] As an optional implementation of this embodiment, in order to adapt to the high-temperature working environment, the device can be provided with a high-temperature resistant coating inside the cylinder 41, and a high-temperature sealing assembly 46 (such as common high-temperature sealing components such as high-temperature sealing rings) can be provided on the drive shaft 43, so that the device can work normally in an environment with a maximum ambient temperature of 750°C and below.

[0035] The effects of the above scheme are described below:

[0036] This embodiment provides a high-temperature resistant and high-precision servo-controlled air conditioning device, which can reduce the space occupation and weight of the overall device through the integrated electro-hydraulic servo valve, actuator, displacement sensor and valve assembly, and can also achieve high-precision closed-loop control through the electro-hydraulic servo valve and displacement sensor, improve the response speed and adjustment accuracy of the air conditioning device, and conveniently meet the functional requirements of anti-surge, anti-icing and cooling during actual use. In addition, the device can also improve its high-temperature resistance through high-temperature resistant coatings and high-temperature sealing components to meet the use requirements in high-temperature environments.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature resistant and high precision servo controlled air conditioning device, characterized in that: The invention comprises an integrated control execution unit, the integrated control execution unit comprising: an electro-hydraulic servo valve (1), an actuator (2), a displacement sensor (3) and a valve assembly; a piston (21) and a rotating shaft (23) connected to the piston (21) via a rocker arm (22) are arranged inside the actuator (2), and oil chambers are arranged on both sides of the piston (21); the electro-hydraulic servo valve (1) is used to convert an electrical signal into a hydraulic signal, and a first output oil port and a second output oil port of the electro-hydraulic servo valve (1) are respectively connected to the oil chambers on both sides of the piston (21), so that the piston (21) moves under the action of the pressure difference of the oil chambers on both sides. The invention relates to a piston assembly (21) for rotating a rotating shaft (23) and a piston (21) for rotating a rotating shaft (23). The displacement sensor (3) is arranged on the actuator cylinder (2), and the displacement sensor (3) is used to feedback the real-time position of the piston (21) so as to facilitate closed-loop control. The valve assembly is used to adjust the outlet flow of the load compressor and turbine of the power device, and the valve assembly comprises: a cylinder (41), a butterfly plate (42) and a drive shaft (43). The drive shaft (43) is rotatably arranged inside the cylinder (41), the butterfly plate (42) is detachably arranged on the drive shaft (43), and the top end of the drive shaft (43) is connected to the rotating shaft (23).

2. A high temperature resistant and high precision servo controlled air conditioning device according to claim 1, characterized in that: The butterfly plate (42) is provided with an assembly sleeve (44) for accommodating the drive shaft (43), a assembling hole is provided on the side wall of the assembly sleeve (44), an assembly bolt (441) is provided inside the assembly hole, and a bolt hole (431) for accommodating the assembly bolt (441) is provided on the side wall of the drive shaft (43).

3. A high temperature resistant and high precision servo controlled air conditioning device according to claim 2, characterized in that: A plurality of reinforcing ribs (442) connected to the end surface of the butterfly plate (42) are provided on the outer side wall of the assembly sleeve (44).

4. A high temperature resistant and high precision servo controlled air conditioning device according to claim 1, characterized in that: A sealing groove (421) is provided on the outer side wall of the butterfly plate (42), and a sealing strip (45) is provided inside the sealing groove (421).

5. The high temperature resistant and high precision servo controlled air conditioning device according to claim 1, characterized in that: The angle formed between the axis of the drive shaft (43) and the axis of the cylinder (41) is less than 90°, the butterfly plate (42) is perpendicular to the axis of the cylinder (41), and an adjustment washer (432) for adjusting the axial position of the butterfly plate (42) is provided on the drive shaft (43).

6. A high temperature resistant and high precision servo controlled air conditioning device according to claim 1, characterized in that: The cylinder (41) is provided with a high temperature resistant coating inside, and a high temperature sealing component (46) is provided on the driving shaft (43).

7. The high temperature resistant and high precision servo controlled air conditioning device according to claim 1, characterized in that: The electro-hydraulic servo valve (1) is a jet deflection plate type electro-hydraulic servo valve (1).

Images