High-pressure jet pipe servo valve

Abstract

The utility model provides a high-pressure jet pipe servo valve. The high-pressure jet pipe servo valve comprises a high-stability motor assembly, a high-pressure-resistant prestage oil way structure and a high-reliability slide valve stage structure. According to the utility model, a high-stability motor assembly structure is adopted, brazing, laser welding and the like are adopted, dozens of small parts are welded together, and the motor assembly is small, compact and high in reliability; according to the utility model, a valve body structure with high pressure resistance and high power-to-weight ratio is adopted, so that the use requirement under 35MPa can be met; according to the utility model, a throttling small hole structure is adopted, so that the pressure of oil leading to a prestage can be effectively reduced, and the stability of the prestage is improved; according to the utility model, a wear-resistant and anti-seizure locking structure is adopted, so that the clamping stagnation between the tightening screw and the valve core threaded hole can be prevented. Compared with other jet pipe servo valves, the high-pressure-resistant jet pipe electro-hydraulic servo valve can stably work under the pressure of 35 MPa, and the use requirement of next-generation aviation equipment is met.

Description

Technical Field

[0001] This utility model belongs to the field of electro-hydraulic servo valve technology, specifically relating to a high-pressure jet tube servo valve. Background Technology

[0002] Electro-hydraulic servo valves play a role in electro-hydraulic conversion and power amplification in hydraulic servo control systems. They can receive electrical signals transmitted from the system and convert them into signals with corresponding polarity and proportionality that can control the load flow or load pressure of the servo valve. This enables the system to output greater hydraulic power and control the displacement, speed, acceleration, and force of the hydraulic actuator. Their performance and reliability directly affect the performance and reliability of the servo valve system.

[0003] With the development of aviation technology, the main characteristics of next-generation equipment requirements are lightweight, high mobility, and high reliability, with aircraft pressure systems increasing from 28MPa to 35MPa. As the core control component of the hydraulic servo valve actuation system in aircraft, servo valves will also face higher usage requirements due to the increased pressure of aircraft pressure systems. Currently, the trend towards higher operating pressures in the hydraulic systems of newly developed aircraft models is evident. Therefore, research on servo valves under high-pressure systems is of great significance for securing a foothold in next-generation aviation equipment. Utility Model Content

[0004] This utility model provides a high-pressure jet tube servo valve that can reliably operate under 35MPa pressure. Through relevant design, it ensures that the servo valve has a stable flow field in the pre-stage under high pressure, reliable sealing, and meets the working performance requirements.

[0005] This utility model provides a high-pressure jet tube servo valve, comprising: a motor assembly 1, a valve body 2, a slide valve amplifier stage 5, a feedback assembly 6, and a receiver 7; wherein:

[0006] Motor assembly 1 includes: housing assembly 21, armature assembly 22, jet assembly 23, and magnetic circuit assembly 24;

[0007] Housing assembly 21 includes: motor housing; armature assembly 22 includes: armature, support spring plate and guide sleeve; jet assembly 23 includes: jet pipe and oil pipe; magnetic circuit assembly 24 includes: magnet and upper and lower magnetic conductors;

[0008] The motor housing is fixed on the valve body 2, and the motor housing contains upper and lower magnetic conductors; the armature is connected to the motor housing through the support spring plates on both sides, and a guide sleeve is set in the center of the armature; the jet pipe passes through the upper and lower magnetic conductors and the center of the guide sleeve, one end of the oil pipe is connected to the jet pipe, and the other end is connected to the oil supply circuit of the valve body 2; the magnet is connected to the upper and lower magnetic conductors.

[0009] The valve body 2 has a central through hole, and multiple annular grooves are formed inside the central through hole; the valve core 3 of the slide valve amplification stage 5 is set inside the central through hole of the valve body 2; the valve body 2 has an oil inlet and an oil outlet on its side wall.

[0010] Feedback component 6 and receiver 7 are disposed on the side wall of valve body 2. Receiver 7 is provided with two oblique pin holes. One end of each oblique pin hole is used to receive the oil sprayed from the nozzle of the jet pipe, and the other end is connected to the two chambers of valve core 3 respectively.

[0011] One end of the feedback component 6 is connected to the jet tube, and the other end is in contact with the valve core 3;

[0012] When the motor assembly 1 generates electromagnetic torque, it drives the jet assembly 23 to deflect, causing the two oblique pin holes of the receiver 7 to receive different volumes of oil, thereby creating a pressure difference at both ends of the valve core 3, which pushes the valve core 3 to move. During the movement of the valve core 3, it will drive the feedback assembly 6 to move. When the feedback torque of the feedback assembly 6 is balanced with the electromagnetic torque of the motor assembly 1, the valve core 3 stops. At this time, the slide valve amplification stage 5 opens a certain opening, so that the servo valve outputs a certain flow rate.

[0013] Optionally, the motor housing and the upper and lower magnetic conductors are welded together by argon arc welding;

[0014] The armature, support spring plate, and guide sleeve are welded together by high-temperature brazing.

[0015] The jet pipe and the oil pipe are welded together by high-temperature brazing.

[0016] The magnet and the upper and lower magnetic conductors are welded together by high-temperature brazing.

[0017] Optionally, the armature assembly 22 is welded to the housing assembly 21 by argon arc welding, the jet assembly 23 is welded to the housing assembly 21 by high-temperature brazing, and the magnetic circuit assembly 24 is welded to the housing assembly 21 by laser welding.

[0018] Optionally, the valve body 2 includes: a titanium alloy valve body 41;

[0019] A crescent-shaped oil passage 42 is provided on the inner side of the titanium alloy valve body 41.

[0020] Optionally, it also includes: orifice 4;

[0021] The throttle orifice 4 is located in the oil supply circuit of the valve body 2;

[0022] A throttling orifice 40 is provided on the upper part of the throttling orifice 4, which is located away from the jet tube.

[0023] Optionally, the valve core 3 has a threaded hole inside, and two opposing fastening screws 72 are installed in the threaded hole;

[0024] Two clamping screws 72 are inserted into the feedback assembly 6 of the valve core 3;

[0025] The valve core 3 is made of G95Cr18, the set screw 72 is made of QBe2, and the thread size between the two is M2.

[0026] The surface of the set screw 72 is silver-plated.

[0027] This invention provides a high-pressure jet tube servo valve, comprising a highly stable motor assembly, a high-pressure resistant pre-stage hydraulic circuit structure, and a highly reliable spool valve stage structure. The invention employs a highly stable motor assembly structure, using brazing and laser welding to weld together more than a dozen small parts, resulting in a compact and highly reliable design. It also features a high-pressure, high power-to-weight ratio valve body structure, capable of operating at 35MPa. Furthermore, it utilizes a throttling orifice structure to effectively reduce the hydraulic pressure leading to the pre-stage, improving its stability. Finally, it incorporates a wear-resistant, anti-seize locking structure to prevent jamming between the locking screw and the valve core threaded hole. Compared to other jet tube servo valves, the high-pressure jet tube electro-hydraulic servo valve provided by this invention can operate stably at 35MPa, meeting the requirements of next-generation aerospace equipment. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a high-pressure jet tube electro-hydraulic servo valve.

[0030] Figure 2 Schematic diagram of a high-stability motor assembly structure Figure 1 ;

[0031] Figure 3 Schematic diagram of a high-stability motor assembly structure Figure 2 ;

[0032] Figure 4 Schematic diagram of valve body structure for high pressure resistance and high power-to-weight ratio Figure 1 ;

[0033] Figure 5 Schematic diagram of valve body structure for high pressure resistance and high power-to-weight ratio Figure 2 ;

[0034] Figure 6 This is a schematic diagram of the throttling orifice structure;

[0035] Figure 7 A schematic diagram of the valve core and the locking screw mating structure;

[0036] Explanation of reference numerals in the attached figures:

[0037] 1-Motor assembly, 2-Valve body, 3-Valve core, 4-Throttle orifice, 5-Slide valve amplifier stage, 6-Feedback assembly, 7-Receiver;

[0038] 21-Housing assembly, 22-Armature assembly, 23-Jet assembly, 24-Magnetic circuit assembly, 41-Titanium alloy valve body, 42-Crescent groove, 40-Throttle orifice, 72-Tightening screw. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] The features and illustrative embodiments of various aspects of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this utility model by illustrating examples of it. This utility model is by no means limited to any specific arrangements and methods set forth below, but covers any improvements, substitutions, and modifications to the structure, method, and apparatus without departing from the spirit of this utility model. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessarily obscuring this utility model.

[0041] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] like Figure 1-7 As shown, this utility model provides a high-pressure jet tube servo valve, including: a motor assembly 1, a valve body 2, a slide valve amplifier stage 5, a feedback assembly 6, and a receiver 7; wherein:

[0043] Motor assembly 1 includes: housing assembly 21, armature assembly 22, jet assembly 23, and magnetic circuit assembly 24;

[0044] Housing assembly 21 includes: motor housing; armature assembly 22 includes: armature, support spring plate and guide sleeve; jet assembly 23 includes: jet pipe and oil pipe; magnetic circuit assembly 24 includes: magnet and upper and lower magnetic conductors;

[0045] The motor housing is fixed on the valve body 2, and the motor housing contains upper and lower magnetic conductors; the armature is connected to the motor housing through the support spring plates on both sides, and a guide sleeve is set in the center of the armature; the jet pipe passes through the upper and lower magnetic conductors and the center of the guide sleeve, one end of the oil pipe is connected to the jet pipe, and the other end is connected to the oil supply circuit of the valve body 2; the magnet is connected to the upper and lower magnetic conductors.

[0046] The valve body 2 has a central through hole, and multiple annular grooves are formed inside the central through hole; the valve core 3 of the slide valve amplification stage 5 is set inside the central through hole of the valve body 2; the valve body 2 has an oil inlet and an oil outlet on its side wall.

[0047] Feedback component 6 and receiver 7 are disposed on the side wall of valve body 2. Receiver 7 is provided with two oblique pin holes. One end of each oblique pin hole is used to receive the oil sprayed from the nozzle of the jet pipe, and the other end is connected to the two chambers of valve core 3 respectively.

[0048] One end of the feedback component 6 is connected to the jet tube, and the other end is in contact with the valve core 3;

[0049] When the motor assembly 1 generates electromagnetic torque, it drives the jet assembly 23 to deflect, causing the two oblique pin holes of the receiver 7 to receive different volumes of oil, thereby creating a pressure difference at both ends of the valve core 3, which pushes the valve core 3 to move. During the movement of the valve core 3, it will drive the feedback assembly 6 to move. When the feedback torque of the feedback assembly 6 is balanced with the electromagnetic torque of the motor assembly 1, the valve core 3 stops. At this time, the slide valve amplification stage 5 opens a certain opening, so that the servo valve outputs a certain flow rate.

[0050] Optionally, the motor housing and the upper and lower magnetic conductors are welded together by argon arc welding;

[0051] The armature, support spring plate, and guide sleeve are welded together by high-temperature brazing.

[0052] The jet pipe and the oil pipe are welded together by high-temperature brazing.

[0053] The magnet and the upper and lower magnetic conductors are welded together by high-temperature brazing.

[0054] Optionally, the armature assembly 22 is welded to the housing assembly 21 by argon arc welding, the jet assembly 23 is welded to the housing assembly 21 by high-temperature brazing, and the magnetic circuit assembly 24 is welded to the housing assembly 21 by laser welding.

[0055] Optionally, the valve body 2 includes: a titanium alloy valve body 41;

[0056] A crescent-shaped oil passage 42 is provided on the inner side of the titanium alloy valve body 41.

[0057] Optionally, it also includes: orifice 4;

[0058] The throttle orifice 4 is located in the oil supply circuit of the valve body 2;

[0059] A throttling orifice 40 is provided on the upper part of the throttling orifice 4, which is located away from the jet tube.

[0060] Optionally, the valve core 3 has a threaded hole inside, and two opposing fastening screws 72 are installed in the threaded hole;

[0061] Two clamping screws 72 are inserted into the feedback assembly 6 of the valve core 3;

[0062] The valve core 3 is made of G95Cr18, the set screw 72 is made of QBe2, and the thread size between the two is M2.

[0063] The surface of the set screw 72 is silver-plated.

[0064] The technical solution of this utility model includes a high-pressure resistant jet tube servo valve, comprising a high-stability motor assembly, a high-pressure resistant pre-stage oil circuit structure, and a high-reliability slide valve stage structure, etc.

[0065] This utility model adopts a highly stable motor assembly structure, which uses brazing, laser welding and other methods to weld more than a dozen small parts together, making it compact, efficient and reliable.

[0066] This utility model adopts a valve body structure with high pressure resistance and high power-to-weight ratio, which can meet the usage requirements at 35MPa.

[0067] This invention employs a throttling orifice structure, which can effectively reduce the oil pressure leading to the pre-stage and improve the stability of the pre-stage.

[0068] This utility model adopts a wear-resistant and anti-seize locking structure, which can prevent jamming between the tightening screw and the threaded hole of the valve core.

[0069] This invention proposes a high-pressure resistant electro-hydraulic servo valve for jet tubes, which, compared to other jet tube servo valves, can operate stably at 35MPa, meeting the usage requirements of next-generation aerospace equipment.

[0070] This utility model relates to a high-pressure resistant jet tube servo valve, such as... Figure 1As shown, the device consists of a motor assembly 1, a spool valve amplifier stage 5, a feedback assembly 6, and a receiver 7. Its working principle is as follows: When a current signal is applied, the motor assembly 1 generates an electromagnetic torque, causing the jet assembly to deflect. This results in different oil volumes being received by the two small holes of the receiver 7, creating a pressure difference across the valve core 3 and pushing it to move. During this movement, the valve core 3 also moves the feedback assembly 6. When the feedback torque of the feedback assembly 6 balances with the electromagnetic torque of the motor assembly 1, the valve core stops. At this point, the spool valve amplifier stage 5 opens a certain opening, allowing the servo valve to output a certain flow rate. The main innovations of this invention are as follows:

[0071] This utility model adopts a highly stable motor assembly structure, such as Figure 2 and Figure 3 As shown, the motor assembly comprises a housing assembly 21, an armature assembly 22, a jet assembly 23, and a magnetic circuit assembly 24. The housing assembly 21 is formed by argon arc welding, which welds the motor housing and upper and lower magnetic conductors together. The armature assembly 22 is formed by high-temperature brazing, which welds the armature, supporting spring plate, and guide sleeve together. The jet assembly 23 is formed by high-temperature brazing, which welds the jet pipe and oil pipe together. The magnetic circuit assembly 24 is formed by high-temperature brazing, which welds the magnet and upper and lower magnetic conductors together. After the components are welded, the armature assembly 22 is argon arc welded to the housing assembly 21, the jet assembly 23 is argon brazed to the housing assembly 21, and the magnetic circuit assembly 24 is laser welded to the housing assembly 21, thus forming the motor assembly. During and after welding, a series of stress-relieving measures are implemented to fully release residual welding stress and ensure the stability of the motor assembly in use.

[0072] This utility model adopts a valve body structure with high power-to-weight ratio and high pressure resistance, such as... Figure 4 and Figure 5 As shown, the valve body consists of a titanium alloy valve body 41, a crescent-shaped groove oil passage 42, and other oil passages. Compared to aluminum alloy valve bodies, titanium alloy valve bodies have higher strength and can effectively withstand high-pressure impacts of 35MPa; compared to steel valve bodies, titanium alloy has lower density and lighter weight, meeting the requirements of a high power-to-weight ratio. Furthermore, to facilitate the machining of the titanium alloy valve body, a crescent-shaped groove structure is designed, which not only effectively expands the flow area of ​​the valve body and reduces throttling, but also allows for direct machining with a milling cutter, resulting in a simple structure and high efficiency.

[0073] This utility model employs a throttling orifice structure, such as Figure 6 As shown, by machining a small throttling orifice 40 at the front end of the throttling orifice 4, the oil can be throttled before the oil source reaches the pre-stage, thereby reducing the oil pressure leading to the pre-stage, improving the stability of the pre-stage, and preventing the motor assembly from whistling due to excessive oil pressure in the pre-stage, which could cause the servo valve to vibrate.

[0074] This utility model employs a wear-resistant and anti-seize locking structure, such as... Figure 7 As shown, it consists of a valve core 3 and a locking screw 72. The valve core 3 is made of G95Cr18 material, and the locking screw 72 is made of QBe2 material. The thread size between the two is M2. By silver plating the locking screw 72, the wear resistance of the locking screw is enhanced, and the two are prevented from seizing during the fit process, which would cause the locking screw 72 to break in the valve core 3.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should be covered within the protection scope of this utility model.

Claims

1. A high-pressure jet tube servo valve, characterized in that, include: The components include a motor assembly (1), a valve body (2), a spool valve amplifier stage (5), a feedback assembly (6), and a receiver (7); wherein: The motor assembly (1) includes: a housing assembly (21), an armature assembly (22), a jet assembly (23), and a magnetic circuit assembly (24); The housing assembly (21) includes: a motor housing; the armature assembly (22) includes: an armature, a supporting spring plate, and a guide sleeve; the jet assembly (23) includes: a jet pipe and an oil pipe; the magnetic circuit assembly (24) includes: a magnet and upper and lower magnetic conductors; The motor housing is fixed on the valve body (2), and the upper and lower magnetic conductors are provided inside the motor housing; the armature is connected to the motor housing through the support spring plates on both sides, and a guide sleeve is provided in the center of the armature; the jet pipe passes through the upper and lower magnetic conductors and the center of the guide sleeve, one end of the oil pipe is connected to the jet pipe, and the other end is connected to the oil supply circuit of the valve body (2); the magnet is connected to the upper and lower magnetic conductors. The valve body (2) has a central through hole, and multiple annular grooves are provided in the central through hole; the valve core (3) of the slide valve amplification stage (5) is located in the central through hole of the valve body (2); the valve body (2) has an oil inlet and an oil outlet on its side wall; Feedback component (6) and receiver (7) are set on the side wall of valve body (2). The receiver (7) is provided with two oblique pin holes. One end of each oblique pin hole is used to receive the oil sprayed from the nozzle of the jet pipe, and the other end is connected to the two chambers of valve core (3). One end of the feedback component (6) is connected to the jet tube, and the other end is in contact with the valve core (3); When the motor assembly (1) generates electromagnetic torque, it drives the jet assembly (23) to deflect, causing the two oblique pin holes of the receiver (7) to receive different volumes of oil, thereby generating a pressure difference at both ends of the valve core (3), which pushes the valve core (3) to move. During the movement of the valve core (3), it will drive the feedback assembly (6) to move. When the feedback torque of the feedback assembly (6) is balanced with the electromagnetic torque of the motor assembly (1), the valve core (3) stops. At this time, the slide valve amplification stage (5) opens a certain opening, so that the servo valve outputs a certain flow rate.

2. The high-pressure jet tube servo valve according to claim 1, characterized in that, The motor housing and the upper and lower magnetic conductors are welded together by argon arc welding; The armature, support spring plate, and guide sleeve are welded together by high-temperature brazing. The jet pipe and the oil pipe are welded together by high-temperature brazing. The magnet and the upper and lower magnetic conductors are brazed together at high temperature.

3. The high-pressure jet tube servo valve according to claim 2, characterized in that, The armature assembly (22) is welded to the housing assembly (21) by argon arc welding, the jet assembly (23) is welded to the housing assembly (21) by high temperature brazing, and the magnetic circuit assembly (24) is welded to the housing assembly (21) by laser welding.

4. The high-pressure jet tube servo valve according to claim 1, characterized in that, The valve body (2) includes: a titanium alloy valve body body (41); A crescent-shaped oil passage (42) is provided on the inner side of the titanium alloy valve body (41).

5. The high-pressure jet tube servo valve according to claim 1, characterized in that, Also includes: Orifice (4); The throttle orifice (4) is located in the oil supply circuit of the valve body (2); A throttling orifice (40) is provided on the upper part of the throttling orifice (4), which is located away from the jet tube.

6. The high-pressure jet tube servo valve according to claim 1, characterized in that, The valve core (3) has a threaded hole inside, and two opposing fastening screws (72) are installed inside the threaded hole; Two tightening screws (72) clamp the feedback assembly (6) inserted into the valve core (3); The valve core (3) is made of G95Cr18, the tightening screw (72) is made of QBe2, and the thread size between the two is M2; The surface of the tightening screw (72) is silver plated.

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