Partial derivative jet amplifier for partial derivative jet type electro-hydraulic servo valve
By designing a deflector-guided injection amplifier that combines a jet column and a jet disk, the problems of difficult machining and oil leakage in traditional deflector-guided injection amplifiers were solved, and precise control of hydraulic oil output was achieved.
Patent Information
- Application Number
- CN202511287506.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-10
- Publication Date
- 2025-10-31
AI Technical Summary
Traditional deflector jet amplifiers are difficult to manufacture, time-consuming and labor-intensive to weld, and prone to leakage between the jet nozzle and the receiver, resulting in inaccurate hydraulic oil output.
Design a deflector-driven injection amplifier that includes a jet column and a jet disk. By cooperating with the jet disk through a deflector baffle, hydraulic oil can flow in the base and receiver, eliminating the need for an oil delivery pipe. The baffle controls the flow rate and pressure, and automatic reset is achieved by combining it with a spring tube.
It simplifies the processing, reduces the risk of oil leakage, improves the precision control of hydraulic oil output, and reduces hysteresis.
Smart Images
Figure CN120868092A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of electro-hydraulic servo valve manufacturing technology, specifically relating to a deflector jet amplifier, and more particularly to a deflector jet amplifier for a deflector jet type electro-hydraulic servo valve. Background Technology
[0002] The electro-hydraulic servo valve is the heart of an electro-hydraulic servo system. Deflecting-jet electro-hydraulic servo valves are widely used in modern industry, aerospace, and military fields due to their strong anti-contamination capabilities and high reliability. Their working principle involves a torque motor driving the armature and jet tube to deflect, thereby controlling the hydraulic oil output flow and pressure, achieving the goal of controlling the hydraulic oil output pressure and flow using electrical signals. The deflecting-jet amplifier is a key component of the deflecting-jet electro-hydraulic servo valve, and its performance directly determines the working performance of the entire servo valve system.
[0003] like Figure 1 and Figure 2 As shown, the structure of a conventional deflector injection amplifier includes a conventional base 1, a conventional jet seat 3, an oil supply pipe 11, a conventional armature 6, a jet pipe 8, and a conventional receiver 4. The conventional base 1 contains a conventional input channel 12 and a conventional output channel 2 for hydraulic oil flow. The conventional jet seat 3 is located on top of the conventional base 1, and the conventional armature 6 is located above the conventional jet seat 3. The conventional receiver 4, located within the conventional receiver countersunk hole of the conventional base 1, contains two conventional liquid outlet channels 5, and the outlets of the two conventional liquid outlet channels 5 are respectively connected to the two conventional output channels. Channel 2 is connected accordingly. The oil delivery pipe 11 is installed in the conventional jet seat 3 and one end of it is connected to the conventional input channel 12 and the other end is connected to the oil delivery channel 7 located in the conventional armature 6. The upper end of the jet pipe 8 is connected to the conventional armature 6 and is connected to the oil delivery channel 7 in the conventional armature 6. The lower end of the jet pipe 8 passes through the corresponding through hole of the conventional jet seat 3 and is located above the conventional receiving seat 4. The lower end of the jet pipe 8 is provided with a jet nozzle 9 and the jet nozzle 9 is connected to the inlet of the two conventional liquid outlet channels 5. The jet pipe 8 is fitted with a sealing inner sleeve 10. During operation, hydraulic oil sequentially passes through the conventional input channel 12, oil supply pipe 11, oil supply channel 7, jet pipe 8, and jet nozzle 9 before entering two conventional outlet channels 5, and then is discharged through two conventional outlet channels 2. By controlling the swing of the conventional armature 6 (the control method is generally to drive the conventional armature 6 to swing by controlling the power supply of the electromagnetic coil; its control structure is not shown in the figure and is not related to the innovation of this application), the jet pipe 8 and jet nozzle 9 are driven to swing, thereby changing the pressure and flow rate of the hydraulic oil entering the two conventional outlet channels 5, and realizing the purpose of changing the pressure and flow rate of the output hydraulic oil through electronic control.
[0004] The aforementioned traditional deflection injection amplifier has the following drawbacks: hydraulic oil enters the traditional receiver 4 through the oil supply pipe 11, the traditional armature 6, and the jet pipe 8. There are many independent components, and each component through which the hydraulic oil passes needs to be welded together. Welding is time-consuming, labor-intensive, and difficult to process. Moreover, the gap between the jet nozzle 9 at the lower end of the jet pipe 8 and the oil inlet at the upper end of the traditional receiver 4 increases when the jet pipe swings, making it easy for oil to leak. This results in a large hysteresis in the pressure and flow curve of the output oil, which is not conducive to the precise control of the hydraulic oil output flow and pressure. Summary of the Invention
[0005] The purpose of this invention is to provide a deflection injection amplifier for a deflection injection type electro-hydraulic servo valve that is easy to manufacture and allows for precise control of hydraulic oil output flow and pressure in order to solve the above-mentioned problems.
[0006] The present invention achieves the above objectives through the following technical solutions: A deflector-jet amplifier for a deflector-jet electro-hydraulic servo valve includes a base, a jet seat, an armature, and a receiver. The base has an input channel and an output channel for hydraulic oil flow. The jet seat is located on top of the base, and the armature is positioned above the jet seat. The receiver, located within a receiving recess in the base, has an inlet channel and an outlet channel, with the outlets of the two outlet channels respectively communicating with the two output channels. The deflector-jet amplifier for the deflector-jet electro-hydraulic servo valve further includes a jet column, a jet cover, and a jet plate. The jet cover and the jet plate are placed within the receiving recess and above the receiver. The jet cover is positioned above the jet plate. The horizontally oriented jet plate has a vertically penetrating, horizontally strip-shaped deflector through-hole. The jet plate has a vertically penetrating inlet hole on one side of the deflector through-hole and a vertically penetrating inlet hole on the other side of the deflector through-hole. The receiver has two vertically penetrating liquid outlets. The liquid inlet and the two liquid outlets are respectively connected to the deflection through-hole. The receiver base has a horizontal limiting groove on its top. The outlet of the liquid inlet channel is located on the top of the receiver base and on one side of the limiting groove, and is vertically connected to the liquid inlet. The inlet of the liquid inlet channel is connected to the input channel. The inlets of the two liquid outlet channels are located on the top of the receiver base and on the other side of the limiting groove, and are vertically connected to the two liquid outlets respectively. The upper end of the vertical jet column is connected to the armature, and the lower end is provided with a deflection baffle. The middle part of the deflection baffle is provided with a baffle through-hole. The deflection baffle passes through the vertical through-hole of the jet base, the vertical through-hole of the jet cover, and the deflection through-hole of the jet disk from top to bottom and is located in the limiting groove of the receiver base. One side of the baffle through-hole is connected to the liquid inlet, and the other side is connected to the two liquid outlets.
[0007] Preferably, in order to better control the hydraulic oil flow, the transverse cross-section of the baffle through hole is trumpet-shaped and its wide end is close to the outlet hole.
[0008] Preferably, to facilitate oil return, the receiving seat is provided with a vertically penetrating oil return hole at the middle position below the bottom of the limiting sink. The receiving seat oil return hole is connected to the limiting sink. The bottom of the receiving sink hole of the base is provided with a vertically penetrating base oil return hole, and the base oil return hole is connected to the receiving seat oil return hole.
[0009] Preferably, in order to facilitate automatic reset of the jet column, a spring tube is fitted around the jet column.
[0010] The beneficial effects of this invention are as follows: This invention achieves precise control of the pressure and flow rate of the output hydraulic oil by setting a deflection baffle at the lower end of the jet column and adding a jet plate that cooperates with the deflection baffle. Ultimately, it realizes the function of eliminating the need for oil delivery pipes and allowing hydraulic oil to flow only within the base and receiving seat. This avoids the time-consuming, labor-intensive, and difficult processing problems associated with welding various oil circuit components, making it easier to process. The way the hydraulic oil enters the receiving seat is independent of the oscillation of the jet column, and the deflection baffle does not increase the oil leakage gap when oscillating, so it will not cause oil leakage. Therefore, the hysteresis of the pressure and flow rate curve of the output oil is small, which is beneficial to the precise control of the hydraulic oil output flow rate and pressure. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the front cross-sectional structure of a traditional bias-guided jet amplifier; Figure 2 yes Figure 1 AA section view in the middle; Figure 3 This is a schematic diagram of the main cross-sectional structure of the deflector-type electro-hydraulic servo valve described in this invention. Figure 4 yes Figure 3 BB section view in the middle; Figure 5 This is a front view schematic diagram of the jet column of the deflecting jet amplifier for the deflecting jet electro-hydraulic servo valve described in this invention. Figure 6 This is a side view of the jet column of the deflector jet amplifier for the deflector jet electro-hydraulic servo valve described in this invention. Figure 7 This is a bottom view of the jet column of the deflector-driven jet amplifier for the deflector-driven electro-hydraulic servo valve described in this invention. The scale of the figure is larger than […]. Figure 5 and Figure 6 ; Figure 8This is a top view of the jet disk of the deflector-type electro-hydraulic servo valve for the deflector-type jet amplifier described in this invention. Figure 9 This is a top view of the receiver of the deflecting injection amplifier for the deflecting injection type electro-hydraulic servo valve described in this invention. Detailed Implementation
[0012] The present invention will be further described below with reference to the accompanying drawings: like Figures 3-9 As shown, the deflecting injection amplifier for a deflecting injection electro-hydraulic servo valve of the present invention includes a base 13, a jet seat 15, an armature 18, a receiving seat 17, a jet column 19, a jet cover 23, and a jet plate 25. The base 13 has an input channel 27 and an output channel 14 for hydraulic oil flow. The jet seat 15 is located on top of the base 13, and the armature 18 is located above the jet seat 15. The receiving seat 17, located within the receiving countersunk hole of the base 13, has an inlet channel 28 and an outlet channel 29. The liquid channel 16 and the outlets of the two liquid outlet channels 16 are respectively connected to the two output channels 14. The jet cover 23 and the jet plate 25 are placed in the receiving sink hole and are located above the receiving base 17. The jet cover 23 is located above the jet plate 25. The horizontal jet plate 25 is provided with a vertically penetrating and horizontally strip-shaped deflection through hole 29. The jet plate 25 is provided with a vertically penetrating liquid inlet hole 30 on one side of the deflection through hole 29 and two liquid inlets 30 on the other side of the deflection through hole 29. A vertically penetrating liquid outlet 31, a liquid inlet 30, and two liquid outlets 31 are respectively connected to a deflection through-hole 29. A horizontally oriented limiting groove 32 is provided on the upper part of the receiving base 17. The outlet of the liquid inlet channel 28 is located on the upper part of the receiving base 17 and on one side of the limiting groove 32, and is vertically connected to the liquid inlet 30. The inlet of the liquid inlet channel 28 is connected to the input channel 27. The inlets of the two liquid outlet channels 16 are located on the upper part of the receiving base 17 and on the other side of the limiting groove 32, and are respectively connected to the two outlets. The liquid hole 31 is vertically connected. The upper end of the vertical jet column 19 is connected to the armature 18, and the lower end is provided with an integrally formed deflection baffle 22. The middle part of the deflection baffle 22 is provided with a baffle through hole 21. The deflection baffle 22 passes through the vertical through hole of the jet seat 15, the vertical through hole of the jet cover 23 and the deflection through hole 29 of the jet disk 25 from top to bottom and is located in the limiting sink 32 of the receiving seat 17. One side of the baffle through hole 21 is connected to the liquid inlet hole 30 and the other side is connected to the two liquid outlet holes 31.
[0013] Preferably, in order to better control the hydraulic oil flow, the transverse cross-section of the baffle through hole 21 is trumpet-shaped and its wide end is close to the outlet hole 31; in order to facilitate oil return, the receiving seat 17 is provided with a vertically penetrating receiving seat oil return through hole 24 at the middle position below the bottom of the limiting sink 32, and the receiving seat oil return through hole 24 is connected to the limiting sink 32; the bottom of the receiving sink hole of the base 13 is provided with a vertically penetrating base oil return through hole 26, and the base oil return through hole 26 is connected to the receiving seat oil return through hole 24; in order to facilitate the automatic reset of the jet column 19, the jet column 19 is fitted with a spring tube 20.
[0014] like Figures 3-9 As shown, during operation, hydraulic oil is sequentially delivered through the conventional input channel 27, the inlet channel 28, the inlet hole 30, the baffle through hole 21, two outlet holes 31, two outlet channels 16, and two output channels 14. By controlling the armature 18 to swing (the control method is generally to drive the armature 18 to swing by controlling the power supply of the electromagnetic coil; its control structure is not shown in the figure and is not related to the innovation of this application), the jet column 19 and the deflection baffle 22 swing, thereby changing the pressure and flow rate of the hydraulic oil entering the two outlet holes 31 respectively, achieving the purpose of changing the pressure and flow rate of the output hydraulic oil through electronic control.
[0015] Note: The above-mentioned base 13, output channel 14, jet seat 15, receiver seat 17, liquid outlet channel 16, armature 18, jet column 19, and input channel 27 correspond one-to-one with the conventional base 1, conventional output channel 2, conventional jet seat 3, conventional receiver seat 4, conventional liquid outlet channel 5, conventional armature 6, jet tube 8, and conventional input channel 12 in the background art. However, due to structural changes or adaptations, different component names and marking numbers are used.
[0016] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the technical solutions of the present invention. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of the patent of the present invention.
Claims
1. A deflector-jet amplifier for a deflector-jet electro-hydraulic servo valve, comprising a base, a jet seat, an armature, and a receiver, wherein the base has an input channel and an output channel for hydraulic oil flow, the jet seat is disposed on top of the base, the armature is located above the jet seat, and the receiver, disposed within a receiving countersunk hole in the base, has an inlet channel and an outlet channel, with the outlets of the two outlet channels respectively communicating with the two output channels, characterized in that: The deflector amplifier for the deflector-type electro-hydraulic servo valve further includes a jet column, a jet cover, and a jet plate. The jet cover and the jet plate are placed inside the receiving recess and above the receiving base. The jet cover is located above the jet plate. The horizontally oriented jet plate has a vertically penetrating deflector through-hole that is horizontally strip-shaped. The jet plate has a vertically penetrating liquid inlet on one side of the deflector through-hole and two vertically penetrating liquid outlets on the other side of the deflector through-hole. The liquid inlet and the two liquid outlets are respectively connected to the deflector through-hole. The receiving base has a horizontally limiting recess on its upper surface, and the outlet of the liquid inlet channel is located on the upper surface of the receiving base. It is located on one side of the limiting sink and is vertically connected to the liquid inlet. The inlet of the liquid inlet channel is connected to the input channel. The inlets of the two liquid outlet channels are located on the top of the receiving seat and on the other side of the limiting sink and are vertically connected to the two liquid outlets respectively. The upper end of the vertical jet column is connected to the armature, and the lower end is provided with a deflection baffle. The middle part of the deflection baffle is provided with a baffle through hole. The deflection baffle passes through the vertical through hole of the jet seat, the vertical through hole of the jet cover and the deflection through hole of the jet plate from top to bottom and is located in the limiting sink of the receiving seat. One side of the baffle through hole is connected to the liquid inlet and the other side is connected to the two liquid outlets.
2. The deflecting injection amplifier for a deflecting injection type electro-hydraulic servo valve according to claim 1, characterized in that: The transverse cross-section of the baffle through hole is trumpet-shaped, with its wide end close to the liquid outlet hole.
3. The deflecting injection amplifier for a deflecting injection type electro-hydraulic servo valve according to claim 1 or 2, characterized in that: The receiving base has a vertically penetrating oil return hole located in the middle of the bottom of the limiting groove. The receiving base oil return hole is connected to the limiting groove. The bottom of the receiving hole of the base has a vertically penetrating base oil return hole, which is connected to the receiving base oil return hole.
4. The deflecting injection amplifier for a deflecting injection type electro-hydraulic servo valve according to claim 1 or 2, characterized in that: The jet column is fitted with a spring tube.