Hydraulic pressure amplification structure of double jet port deflector plate with liquid flow force compensation

Abstract

The application belongs to the technical field of electro-hydraulic servo valves, and discloses a double-jet port type deflector plate hydraulic amplification structure with liquid flow force compensation, which comprises an upper cover plate, a second jet disc, an oil way valve block, a first jet disc and a lower cover plate which are stacked and installed from top to bottom, wherein the upper cover plate, the second jet disc, the oil way valve block, the first jet disc and the lower cover plate are provided with a deflector plate mounting groove which penetrates from top to bottom in the center, and a deflector plate is inserted and mounted in the deflector plate mounting groove; the lower cover plate is provided with an oil inlet hole and an oil outlet hole, and oil enters the oil inlet hole and is then divided into two paths, one of which is communicated with the oil outlet hole after being pressurized by the first jet disc, and the other of which is communicated with the oil outlet hole after being pressurized by the second jet disc after being transmitted by the oil way valve block, and the pressurization directions of the first jet disc and the second jet disc are opposite and collide on the deflector plate. The double-jet port type jet flow form is adopted, the output flow is significantly increased, the left and right receivers have a significantly improved pressure, and the double-jet port type deflector plate hydraulic amplification structure has the advantages of stable working performance and high control margin.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electro-hydraulic servo valve, and relates to a hydraulic amplification structure based on a jet plate structure, in particular to a double-jet port type deflection plate hydraulic amplification structure with liquid flow force compensation. BACKGROUND

[0002] The electro-hydraulic servo valve is a core component of the electro-hydraulic servo system, which combines the superior performance of electricity in signal amplification, operation and feedback measurement and the irreplaceable advantages of hydraulic power in power control, power amplification and reliability. The electro-hydraulic servo valve is widely used in the fields of national defense equipment such as aerospace, ships and weapons. The existing jet type electro-hydraulic servo valve is mainly divided into two types of deflection plate servo valve and jet pipe servo valve. Compared with the jet pipe servo valve, the deflection plate servo valve replaces the jet pipe hydraulic amplification structure with a deflection plate-jet disc type hydraulic amplification structure with smaller rotational inertia, which retains the anti-pollution advantage of the jet pipe structure while improving the dynamic response speed of the servo valve.

[0003] In the traditional deflection plate hydraulic amplification structure, the thickness of the jet disc is very thin, and the flow area at the jet port is small. Increasing the thickness of the jet disc will increase the Reynolds number at the jet port, making the flow of oil more complex. More oil impacting on the deflection plate will also cause the liquid flow force to increase, affecting the stability of the deflection plate movement, and prone to high-frequency whistling and oscillation phenomenon. Therefore, the traditional deflection plate hydraulic amplification structure has the problems of small control flow, low reliability, large liquid flow force and easy high-frequency oscillation. SUMMARY

[0004] In order to solve the above problems, the present application provides a double-jet port type deflection plate hydraulic amplification structure with liquid flow force compensation. The output control flow of the structure is large, the working performance is stable, and the control margin is high.

[0005] The technical scheme of the present application is as follows:

[0006] A double-jet port type deflection plate hydraulic amplification structure with liquid flow force compensation, comprising a deflection plate, an upper cover plate, a second jet disc, an oil path valve block, a first jet disc and a lower cover plate, wherein the upper cover plate, the second jet disc, the oil path valve block, the first jet disc and the lower cover plate are stacked from top to bottom, the upper cover plate, the second jet disc, the oil path valve block, the first jet disc and the lower cover plate have a deflection plate mounting groove passing through from top to bottom in the center, and the deflection plate is inserted and mounted in the deflection plate mounting groove; the lower cover plate is provided with an oil inlet hole and an oil outlet hole, oil enters from the oil inlet hole and is divided into two paths, one path is communicated with the oil outlet hole after being pressurized by the first jet disc, and the other path is communicated with the oil outlet hole after being pressurized by the second jet disc after being transmitted by the oil path valve block, and the pressurization directions of the first jet disc and the second jet disc are opposite and collide on the deflection plate.

[0007] Further, the lower cover plate comprises an oil inlet hole, an oil return hole, a jet flow expansion slot, a right receiving hole and a left receiving hole; the oil inlet hole is communicated with the oil supply path of the hydraulic system, and the inside of the oil inlet hole is communicated with the internal oil path of the structure; the oil return hole is communicated with the oil return path of the hydraulic system, and the oil return hole is part of the deflector plate mounting groove; the jet flow expansion slot is a rectangular blind groove structure for reducing jet flow resistance and is horizontally arranged on the side of the oil return hole; the right receiving hole is communicated with the right side cavity of the controlled spool valve or the execution component, and the left receiving hole is communicated with the left side cavity of the controlled spool valve or the execution component; the right receiving hole and the left receiving hole are oil outlet holes.

[0008] Further, the first jet plate comprises an oil inlet tapered hole, a rectangular jet window, a first jet plate oil return hole, a right receiver, a flow splitting wedge and a left receiver; the oil inlet tapered hole is communicated with the oil inlet hole below, and the side of the oil inlet tapered hole is communicated with the rectangular jet window in a tapered manner; the rectangular jet window is a narrow oil path and is communicated with the first jet plate oil return hole at the rear end; the first jet plate oil return hole is part of the deflector plate mounting groove; the oil is jetted from the deflector plate to the flow splitting wedge at the rear end after being pressurized in the rectangular jet window; the flow splitting wedge cuts the oil into two oil paths, which are respectively introduced into the right receiver and the left receiver; the right receiver is communicated with the right receiving hole, and the left receiver is communicated with the left receiving hole.

[0009] Further, the second jet plate and the first jet plate are two jet plates with the same structure and installed horizontally in opposite directions at 180°.

[0010] Further, the oil path valve block comprises a second jet oil inlet path, a first jet left receiver oil path, a left receiver communication oil path, a second jet left receiver oil path, an oil inlet communication oil path, a first jet right receiver oil path, a right receiver communication oil path, a second jet right receiver oil path and a first jet oil inlet path; the second jet oil inlet path is communicated with the first jet oil inlet path through the oil inlet communication oil path; the upper end of the second jet oil inlet path is communicated with the oil inlet hole of the second jet plate, and the lower end of the first jet oil inlet path is communicated with the oil inlet hole of the first jet plate; the first jet left receiver oil path is communicated with the second jet left receiver oil path through the left receiver communication oil path; the lower end of the first jet left receiver oil path is communicated with the left receiver of the first jet plate, and the upper end of the second jet left receiver oil path is communicated with the left receiver of the second jet plate; the first jet right receiver oil path is communicated with the second jet right receiver oil path through the right receiver communication oil path; the lower end of the first jet right receiver oil path is communicated with the right receiver of the first jet plate, and the upper end of the second jet right receiver oil path is communicated with the right receiver of the second jet plate.

[0011] Further, the upper cover plate comprises an upper cover plate oil return hole and an upper cover plate jet flow expansion slot; the upper cover plate oil return hole is communicated with the oil return path of the hydraulic system through the circular hole type oil return passage below, and the upper cover plate oil return hole is part of the deflector plate mounting groove; the upper cover plate jet flow expansion slot is a rectangular blind groove structure for reducing jet flow resistance and is horizontally arranged on the side of the upper cover plate oil return hole.

[0012] Further, the deflector plate comprises a torque transmission guide rod, a first V-shaped groove and a second V-shaped groove; the first V-shaped groove and the second V-shaped groove are through grooves with large inlets and small outlets, and the cross sections form V-shaped structures; the first V-shaped groove and the second V-shaped groove are respectively arranged at the height positions corresponding to the second jet plate and the first jet plate of the torque transmission guide rod, the inlet and outlet directions of the first V-shaped groove and the second V-shaped groove are opposite, the inlet direction of the first V-shaped groove is aligned with the direction of the oil inlet tapered hole of the second jet plate, and the inlet direction of the second V-shaped groove is aligned with the direction of the oil inlet tapered hole of the first jet plate.

[0013] Further, the included angle of the two side walls of the V-shaped groove of the first V-shaped groove and the second V-shaped groove is 145°.

[0014] Further, the deflector plate is away from the oil return hole of the second jet plate and the oil return hole of the first jet plate by a certain gap.

[0015] The beneficial effects of the present application are as follows:

[0016] 1. The present application is different from the traditional deflector plate hydraulic amplification structure, the novel structure adopts a double-jet port type jet flow form, the output flow is significantly increased, the left and right receivers are significantly improved in pressure, and the novel structure also has the advantages of high control margin.

[0017] 2. The present application is different from the jet port-V-shaped groove co-directional configuration scheme, the novel deflector plate hydraulic amplification structure adopts a bidirectional symmetrical configuration of jet port-V-shaped groove, the bidirectional jet flow simultaneously impacts the deflector plate, so that the liquid flow forces on the deflector plate are offset to each other, and the stability of the movement of the deflector plate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the patent embodiment of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 The deflector plate hydraulic amplification structure schematic diagram provided for the embodiment of the present application;

[0020] Figure 2 The lower cover plate structure schematic diagram provided for the embodiment of the present application;

[0021] Figure 3 The first jet plate structure schematic diagram provided for the embodiment of the present application;

[0022] Figure 4 The oil way valve block structure schematic diagram provided for the embodiment of the present application;

[0023] Figure 5 The second jet disc structure schematic diagram provided for the embodiment of the present application;

[0024] Figure 6 The upper cover plate structure schematic diagram provided for the embodiment of the present application;

[0025] Figure 7 The deflection plate structure schematic diagram provided for the embodiment of the present application;

[0026] Figure 8 The first jet disc and the second jet disc bidirectional symmetry arrangement schematic diagram;

[0027] Figure 9 The deflection plate hydraulic amplification structure sectional view (A-A) provided for the embodiment of the present application;

[0028] Figure 10 The double jet port type jet principle schematic diagram provided for the embodiment of the present application;

[0029] Wherein, 1 - lower cover plate, 2 - first jet disc, 3 - oil way valve block, 4 - second jet disc, 5 - upper cover plate, 6 - deflection plate;

[0030] 1.1 - lower cover plate oil inlet hole, 1.2 - lower cover plate oil return hole, 1.3 - lower cover plate jet expansion groove, 1.4 - right receiving hole, 1.5 - left receiving hole;

[0031] 2.1 - oil inlet tapered hole, 2.2 - rectangular jet window, 2.3 - first jet disc oil return hole, 2.4 - right receiver, 2.5 - shunt split tip, 2.6 - left receiver;

[0032] 3.1 - second jet oil inlet way, 3.2 - first jet left receiver oil way, 3.3 - left receiver communication oil way, 3.4 - second jet left receiver oil way, 3.5 - oil inlet communication oil way, 3.6 - first jet right receiver oil way, 3.7 - right receiver communication oil way, 3.8 - second jet right receiver oil way, 3.9 - first jet oil inlet way;

[0033] 4.1 - oil inlet tapered hole, 4.2 - rectangular jet window, 4.3 - first jet disc oil return hole, 4.4 - right receiver, 4.5 - shunt split tip, 4.6 - left receiver;

[0034] 5.1 - upper cover plate oil return hole, 5.2 - upper cover plate jet expansion groove;

[0035] 6.1 - moment transmission guide rod, 6.2 - first V-shaped groove, 6.3 - second V-shaped groove. DETAILED DESCRIPTION

[0036] This part is the embodiment of the present application, used to explain and illustrate the technical solutions of the present application. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship as given in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or the case referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0038] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be interpreted broadly, for example, it can be fixed connection, or detachable connection or integrated connection; it can be mechanical connection, or point connection; it can be direct connection, or indirect connection through intermediate medium, or communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] A hydraulic pressure amplification structure of a double jet port type deflector plate with liquid flow force compensation, comprising a deflector plate 6, an upper cover plate 5, a second jet disc 4, an oil path valve block 3, a first jet disc 2 and a lower cover plate 1, wherein the upper cover plate 5, the second jet disc 4, the oil path valve block 3, the first jet disc 2 and the lower cover plate 1 are stacked from top to bottom, the upper cover plate 5, the second jet disc 4, the oil path valve block 3, the first jet disc 2 and the lower cover plate 1 have a deflector plate mounting slot passing through from top to bottom in the center, and the deflector plate 6 is inserted and mounted in the deflector plate mounting slot; the lower cover plate 1 is provided with an oil inlet hole and an oil outlet hole, oil enters from the oil inlet hole and is divided into two ways, one way is connected to the oil outlet hole after being pressurized by the first jet disc 2, and the other way is connected to the oil outlet hole after being pressurized by the second jet disc 4 after being transmitted by the oil path valve block 3, and the pressurization directions of the first jet disc 2 and the second jet disc 4 are opposite and collide on the deflector plate 6.

[0040] The lower cover plate 1 comprises an oil inlet hole 1.1, an oil return hole 1.2, a jet flow expansion slot 1.3, a right receiving hole 1.4 and a left receiving hole 1.5; the oil inlet hole 1.1 is communicated with the oil supply path of the hydraulic system on the outside and with the internal oil path of the structure on the inside; the oil return hole 1.2 is communicated with the oil return path of the hydraulic system and is part of the deflector plate mounting slot; the jet flow expansion slot 1.3 is a rectangular blind slot structure for reducing jet flow resistance and is horizontally arranged on the side of the oil return hole 1.2; the right receiving hole 1.4 is communicated with the right side cavity of the controlled spool valve or actuating component, and the left receiving hole 1.5 is communicated with the left side cavity of the controlled spool valve or actuating component; the right receiving hole 1.4 and the left receiving hole 1.5 are both oil outlet holes.

[0041] The first jet plate 2 comprises an oil inlet tapered hole 2.1, a rectangular jet window 2.2, a first jet plate oil return hole 2.3, a right receiver 2.4, a flow splitting wedge 2.5 and a left receiver 2.6; the oil inlet tapered hole 2.1 is communicated with the oil inlet hole below, is tapered on the side and communicated with the rectangular jet window 2.2, the rectangular jet window 2.2 is a narrow oil path and is communicated with the first jet plate oil return hole 2.3 at the rear end, the first jet plate oil return hole 2.3 is part of the deflector plate mounting slot, the oil liquid is jetted from the deflector plate 6 to the flow splitting wedge 2.5 at the rear end after being pressurized from the rectangular jet window 2.2, the flow splitting wedge 2.5 cuts the oil liquid into two oil paths to enter the right receiver 2.4 and the left receiver 2.6 respectively, the right receiver 2.4 is communicated with the right receiving hole 1.4, and the left receiver 2.6 is communicated with the left receiving hole 1.5.

[0042] The second jet plate 4 and the first jet plate 2 are two jet plates with the same structure and installed horizontally in opposite directions at 180°.

[0043] The oil passage valve block 3 comprises a second jet oil inlet passage 3.1, a first jet left receiver oil passage 3.2, a left receiver communication oil passage 3.3, a second jet left receiver oil passage 3.4, an oil inlet communication oil passage 3.5, a first jet right receiver oil passage 3.6, a right receiver communication oil passage 3.7, a second jet right receiver oil passage 3.8 and a first jet oil inlet passage 3.9 in the oil passage valve block 3; the second jet oil inlet passage 3.1 is connected with the first jet oil inlet passage 3.9 through the oil inlet communication oil passage 3.5; the upper end of the second jet oil inlet passage 3.1 is connected with the oil inlet hole of the second jet disc 4, and the lower end of the first jet oil inlet passage 3.9 is connected with the oil inlet hole of the first jet disc 2; the first jet left receiver oil passage 3.2 is connected with the second jet left receiver oil passage 3.4 through the left receiver communication oil passage 3.3; the lower end of the first jet left receiver oil passage 3.2 is connected with the left receiver 2.6 of the first jet disc 2, and the upper end of the second jet left receiver oil passage 3.4 is connected with the left receiver 4.6 of the second jet disc 4; the first jet right receiver oil passage 3.6 is connected with the second jet right receiver oil passage 3.8 through the right receiver communication oil passage 3.7; the lower end of the first jet right receiver oil passage 3.6 is connected with the right receiver 2.4 of the first jet disc 2, and the upper end of the second jet right receiver oil passage 3.8 is connected with the right receiver 4.4 of the second jet disc 4.

[0044] The upper cover plate 5 comprises an upper cover plate oil return hole 5.1 and an upper cover plate jet expansion groove 5.2; the upper cover plate oil return hole 5.1 is connected with the hydraulic system oil return passage through the circular hole type oil return passage below and is part of the deflector plate installation groove; the upper cover plate jet expansion groove 5.2 is a rectangular blind groove structure for reducing jet resistance and is horizontally arranged on the side of the upper cover plate oil return hole 5.1.

[0045] The deflector plate 6 comprises a torque transmission guide rod 6.1, a first V-shaped groove 6.2 and a second V-shaped groove 6.3; the first V-shaped groove 6.2 and the second V-shaped groove 6.3 are both through grooves with large inlet and small outlet and form V-shaped structures in cross section; the first V-shaped groove 6.2 and the second V-shaped groove 6.3 are respectively arranged at the height positions corresponding to the second jet disc 4 and the first jet disc 2 of the torque transmission guide rod 6.1; the inlet direction of the first V-shaped groove 6.2 is opposite to the inlet direction of the second V-shaped groove 6.3; the inlet direction of the first V-shaped groove 6.2 is aligned with the direction of the oil inlet tapered hole of the second jet disc 4, and the inlet direction of the second V-shaped groove 6.3 is aligned with the direction of the oil inlet tapered hole 2.1 of the first jet disc 2.

[0046] The included angle between the two side walls of the V-shaped grooves of the first V-shaped groove 6.2 and the second V-shaped groove 6.3 is 145°.

[0047] The deflector plate 6 is spaced apart from the oil return hole of the second jet disc 4 and the oil return hole of the first jet disc 2.

[0048] The following is another embodiment of the present application.

[0049] The embodiments of the present invention provide a dual-jet deflector plate hydraulic amplification structure with fluid force compensation, which consists of a deflector plate, two-stage jet disks and a cover plate. By utilizing the bidirectional symmetrical configuration of the jet ports and the V-groove of the deflector plate, the fluid force acting on the deflector plate is compensated. The dual-redundancy structure of two jet ports and four receivers increases the hydraulic control flow rate, improves the load pressure, and enhances the system reliability.

[0050] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0051] A hydraulic amplification structure with a dual-jet deflector plate and fluid force compensation, such as... Figure 1 As shown, it includes a deflection plate 6 installed in the deflection plate mounting slot, and an upper cover plate 5, a second jet plate 4, an oil circuit valve block 3, a first jet plate 2, and a lower cover plate 1 arranged sequentially from top to bottom.

[0052] The lower cover plate 1 is as follows Figure 2 The device includes an oil inlet hole 1.1, an oil return hole 1.2, a jet expansion groove 1.3, a right receiving hole 1.4, and a left receiving hole 1.5 on the lower cover plate. The oil inlet hole 1.1 communicates with the hydraulic system's oil supply circuit; the oil return hole 1.2 communicates with the hydraulic system's oil return circuit; the jet expansion groove 1.3 is a rectangular groove structure that reduces jet resistance, and its length should be as long as possible to facilitate full jet expansion; the right receiving hole 1.4 communicates with the right side cavity of the controlled spool valve or actuator; and the left receiving hole 1.5 communicates with the left side cavity of the controlled spool valve or actuator.

[0053] The second jet disk 4 and the first jet disk 2 have the same structure, such as Figure 3 and Figure 5The oil inlet taper hole 2.1, the rectangular jet window 2.2, the oil return hole 2.3, the right receiver 2.4, the flow splitting wedge 2.5 and the left receiver 2.6 (the feature numbers in the second jet disc are similar to 4). In the oil inlet taper hole 2.1, the taper angle is the angle between the tapered rectangular hole inner wall and the jet center line, and the taper angle is 26° to achieve uniform change of the hole diameter, provide the jet inlet channel, and use the oil pressure drop to accelerate the jet in this section of the journey; the length of the rectangular jet window 2.2 is short and the width is very small, the minimum width is only 0.1mm, which provides a large jet velocity and is also a dangerous point of contamination blockage, in addition, the inner wall of the rectangular jet window 2.2 has good roughness to reduce the jet injection resistance and ensure excellent jet convergence; the oil return hole 2.3 is a larger groove structure cut on the jet disc, and the inner diameter is several times larger than the jet inlet diameter to ensure smooth fluid return; the right receiver 2.4 communicates with the right receiving hole 4 of the lower cover plate 1 described above, to ensure that the received control oil flows into the receiving hole to control the first lower component, the receiver inner wall angle is the angle between the two sides of the receiver inner wall and the jet center line, and the receiver inner wall angle is 22° and 47°, the receiver inner wall angle range needs to cover the expansion angle of the secondary jet ejected from the deflected V-shaped groove, to ensure that as much as possible of the jet from the V-shaped groove is received to improve the jet efficiency; the flow splitting wedge 2.5 is a sharp peak structure machined on the jet disc, with a width less than 1mm and cannot be machined to have no width to ensure good resistance to erosion and wear; the left receiver 2.6 communicates with the right receiving hole 5 of the lower cover plate 1 described above, to ensure that the received control oil flows into the receiving hole to control the first lower component, and the inner wall angle of the left receiver 2.6 is consistent with that of the right receiver 2.4, to ensure left-right symmetry of the structure and realize precise control of the bidirectional output performance.

[0054] The oil passage valve block 3 is as shown in the figure Figure 4 The oil passage valve block 3 is as shown in the figure The second jet oil inlet passage 3.1, the first jet left receiver oil passage 3.2, the left receiver communication oil passage 3.3, the second jet left receiver oil passage 3.4, the oil inlet communication oil passage 3.5, the first jet right receiver oil passage 3.6, the right receiver communication oil passage 3.7, the second jet right receiver oil passage 3.8 and the first jet oil inlet passage 3.9. The second jet oil inlet passage 3.1, the oil inlet communication oil passage 3.5 and the first jet oil inlet passage 3.9 of the oil passage valve block 3 are connected, to provide an oil passage connection channel and ensure smooth oil passage. The first jet left receiver oil passage 3.2, the left receiver communication oil passage 3.3 and the second jet left receiver oil passage 3.4 of the oil passage valve block 3 are connected, to ensure oil gathering of the left receiver of the two-stage jet disc and realize large flow output. The first jet right receiver oil passage 3.6, the right receiver communication oil passage 3.7 and the second jet right receiver oil passage 3.8 of the oil passage valve block 3 are connected, to ensure smooth oil flow of the right receiver of the two-stage jet disc.

[0055] The upper cover plate 5 is as shown in Figure 6 The upper cover plate 5 includes an oil return hole 5.1 and a jet flow expansion slot 5.2. The oil return hole 5.1 communicates with the hydraulic system oil return passage through the circular hole below; the jet flow expansion slot 5.2 is a rectangular slot structure for reducing jet flow resistance, and facilitates smooth oil return.

[0056] The deflector plate 6 is as shown in Figure 7 The deflector plate 6 includes a torque transmission guide rod 6.1, a first V-shaped slot 6.2 and a second V-shaped slot 6.3. The torque applied to the torque transmission guide rod 6.1 causes the deflector plate to deflect left and right by a small angle. The deflector plate is installed in the oil return holes 2.3 and 4.3 of the first jet flow disc 2 and the second jet flow disc 4, and is immersed in hydraulic oil. Through small-angle mechanical movement, the pressure of the left and right receivers changes, achieving the effect of hydraulic amplification; the first V-shaped slot 6.2 and the second V-shaped slot 6.3 are completely the same in structure and size, and are symmetrically processed on the front and rear surfaces of the deflector plate at 180°. The V-shaped side wall angle needs to ensure complete reception of the jet flow, and at the same time, the angle cannot be too large to prevent excessive energy loss caused by reverse backflow along the side wall, thereby improving the jet flow efficiency.

[0057] The upper cover plate 5, the second jet flow disc 4, the oil passage valve block 3, the first jet flow disc 2 and the lower cover plate 1 of the double-jet port type deflector plate hydraulic amplification structure are sequentially stacked from top to bottom, the faces of the above-mentioned parts contact each other, and the lateral position is assisted by the outer cylindrical surface. The upper surface of the upper cover plate 5 and the lower surface of the lower cover plate 1 are fixed and constrained.

[0058] As shown in Figure 8 The deflector plate 6 is installed in the oil return holes of the above-mentioned parts, and the deflector plate 6 has a certain gap from the oil return hole 4.3 of the second jet flow disc and the oil return hole 2.3 of the first jet flow disc. At the same time, the first jet flow disc 2 and the second jet flow disc 4 are arranged in a 180° bidirectional symmetry, and the rectangular jet flow window 2.2 of the first jet flow disc and the rectangular jet flow window 4.2 of the second jet flow disc are respectively opposite to the first V-shaped slot 3.2 and the second V-shaped slot 3.3 of the deflector plate 3.

[0059] As shown in Figure 9The oil return holes of the upper cover plate 5, the second jet flow disc 4, the oil path valve block 3, the first jet flow disc 2 and the lower cover plate 1 are completely communicated; the jet flow expansion grooves of the upper cover plate 5, the second jet flow disc 4 and the oil path valve block 3 are completely communicated, so as to ensure smooth return of the system oil; the jet flow expansion grooves of the oil path valve block 3, the first jet flow disc 2 and the lower cover plate 1 are completely communicated, so as to ensure complete expansion of the two jet flows and reduce the movement resistance; the oil inlet hole 1.1 of the lower cover plate 1, the oil inlet path of the first jet flow disc 2, the first jet flow oil inlet path 3.9, the oil inlet communication oil path 3.5, the second jet flow oil inlet path 3.1 of the oil path valve block 3 and the oil inlet path of the second jet flow disc 4 are communicated, so as to ensure communication of the oil inlet paths of the two jet flow discs and realize smooth oil inlet.

[0060] The left receiving hole 1.5 of the lower cover plate, the first jet flow left receiver oil path 3.2 of the oil path valve block 3, the left receiver communication oil path 3.3 and the second jet flow left receiver oil path 3.4 are communicated, so as to ensure that the oil liquid ejected in two directions is received by the symmetrically arranged left receivers 2.6 and 4.6 and then flows into the left receiving hole 1.5 of the lower cover plate, thereby realizing output of the left control flow.

[0061] The jet flow expansion groove of the lower cover plate is a rectangular groove structure for reducing the jet flow resistance, and the length is as long as possible to facilitate full expansion of the jet flow.

[0062] The taper angle of the jet flow disc is the included angle between the inner wall of the tapered rectangular hole and the jet flow center line, which is used to realize uniform change of the hole diameter, provide an inflow channel for the jet flow and accelerate the jet flow in the section by using the pressure drop of the oil liquid.

[0063] The rectangular jet flow window of the jet flow disc provides a larger jet flow velocity and is also a dangerous point of contamination blockage, and the inner wall has good roughness to reduce the jet flow resistance and ensure excellent jet flow convergence.

[0064] The oil return hole of the jet flow disc is a larger groove structure cut on the jet flow disc, and the inner hole diameter is several times larger than the jet flow inflow hole diameter, so as to ensure smooth return of the fluid.

[0065] The flow splitting wedge of the jet flow disc is a sharp peak structure machined on the jet flow disc, and the width is less than 1 mm and cannot be machined to have no width, so as to ensure a certain anti-erosion wear performance.

[0066] The left and right receivers of the jet disc are structures that ensure the received control oil to flow into the receiving hole to control the first component, the inner wall angle of the receiver is the angle between the inner wall of the receiver and the center line of the jet, and the angle range of the inner wall of the receiver needs to cover the expansion angle of the secondary jet ejected from the V-shaped groove of the deflector plate, so as to ensure that as much jet as possible is received from the jet ejected from the V-shaped groove and improve the jet efficiency. The inner wall angles of the left and right receivers are completely consistent, which ensures the left-right symmetry of the structure and realizes the precise control of the bidirectional output performance.

[0067] The second jet oil inlet channel, the oil inlet communication channel and the first jet oil inlet channel of the oil path valve block are connected, a channel for oil path connection is provided, and the oil path is ensured to be unobstructed. The first jet left receiver oil path, the left receiver communication oil path and the second jet left receiver oil path of the oil path valve block are connected, the oil of the left receiver of the two-stage jet disc is converged, and large flow output is realized. The first jet right receiver oil path, the right receiver communication oil path and the second jet right receiver oil path of the oil path valve block are connected, and the oil of the right receiver of the two-stage jet disc flows smoothly.

[0068] The deflector plate changes the pressure of the left and right receivers through a small-angle mechanical movement, realizes the effect of hydraulic amplification, and the V-shaped side wall angle of the deflector plate needs to ensure complete reception of the jet, and at the same time, the angle cannot be too large to prevent reverse backflow along the side wall and cause excessive energy loss, thereby improving the jet efficiency.

[0069] The oil return holes of the upper cover plate, the second jet disc, the oil path valve block, the first jet disc and the lower cover plate of the deflector plate hydraulic amplification structure are completely connected, the system oil return is ensured to be unobstructed, the jet expansion grooves of the oil path valve block, the first jet disc and the lower cover plate are completely connected, the two jets are completely expanded, and the movement resistance is reduced, the oil inlet holes of the lower cover plate, the oil inlet channels of the first jet disc, the first jet oil inlet channel, the oil inlet communication channel, the second jet oil inlet channel of the oil path valve block and the oil inlet channel of the second jet disc are connected, the oil inlet channels of the two jet discs are communicated, and the oil inlet is ensured to be unobstructed.

[0070] The left receiving hole of the lower cover plate, the first jet left receiver oil path, the left receiver communication oil path and the second jet left receiver oil path of the oil path valve block are connected, the oil ejected in two directions is received by the symmetrically arranged left receivers and then converged to the left receiving hole of the lower cover plate, and the left control flow output is realized. The right receiving hole of the lower cover plate, the first jet right receiver oil path, the right receiver communication oil path and the second jet right receiver oil path of the oil path valve block are connected, the oil ejected in two directions is received by the symmetrically arranged right receivers and then converged to the right receiving hole of the lower cover plate, and the right control flow output is realized.

[0071] This invention discloses a novel dual-jet-orifice type deflector plate hydraulic amplification structure, and provides methods for addressing key issues such as zero-position adjustment, fluid flow compensation, and redundancy control in the deflector plate hydraulic amplification structure, as detailed below:

[0072] The working method of a single-jet deflector plate hydraulic amplification structure: as follows Figure 10 As shown in (a), initially, the deflector plate 6 is located in the middle of the oil return hole 2.3 of the jet disk 2. High-pressure oil enters from the oil inlet converging hole 2.1 and completes one jet at the rectangular jet window 2.2. The second V-groove 6.3 of the deflector plate receives the oil from the first jet and flows out at the V-shaped guide port to form a secondary jet. The high-speed ejected oil enters the left and right receivers 2.4 and 2.6 respectively under the action of the splitting wedge 2.5, and finally flows to the load to form the control flow. However, when the deflector plate 6 is given a certain offset, the lateral offset of the second V-groove 6.3 of the deflector plate will cause the flow rate of the secondary jet into the left and right receivers 2.4 and 2.6 to be inconsistent, thus generating different control flow rates. When the deflector plate 6 deflects to the right, the control flow rate entering the right receiver 2.4 is greater than the control flow rate entering the left receiver 2.6. The control pressure generated on the right side of the controlled load is greater than on the left, thus driving the load to move. Conversely, when the deflector plate 6 deflects to the left, the control flow rate entering the left receiver 2.6 is greater than the control flow rate entering the right receiver 2.4, thus driving the controlled load to move in the opposite direction. Therefore, the slight deflection of the deflector plate achieves hydraulic amplification and flow control, offering advantages such as simple structure and good output performance.

[0073] The working method of the dual-jet deflector plate hydraulic amplification structure: As mentioned above, the lateral offset of the second V-groove 6.3 of the deflector plate causes inconsistent flow rates in the left and right receivers 2.4 and 2.6, thus generating different control flow rates and achieving the function of hydraulic amplification; therefore, as Figure 10 (a) and Figure 10 As shown in (b), when the two jet ports work simultaneously, the oil circuit valve block connects the receivers 2.4 and 2.6 on the two jet disks 2 and 4 with the receivers 4.4 and 4.6 respectively. This results in the control flow entering the receivers being doubled due to the offset of the deflection plate 6, achieving a larger control flow. The control pressure on the controlled load is also increased, thus improving the control effect of the deflection plate hydraulic amplification structure.

[0074] Zero-position adjustment method: After the dual-jet deflector plate hydraulic amplification structure is installed as described above, the left and right receiving holes 1.4 and 1.5 of the lower cover plate 1 are connected to pressure gauges respectively. Read the readings of the left and right pressure gauges at this time. When the reading of the left pressure gauge is greater than that of the right pressure gauge, gently tap the torque transmission guide rod 6.1 of the deflector plate 6 to the right. Conversely, gently tap it to the left. After several repeated taps on the left and right, the readings of the pressure gauges on both sides are finally equal, thus completing the zero-position adjustment of the present invention, that is, the deflector plate 6 is in the middle position and the left and right control flow rates are consistent.

[0075] The liquid flow compensation method: since the first jet disc 2 and the second jet disc 4 are arranged in 180° bidirectional symmetry, and the first V-shaped groove 6.2 of the deflector plate and the second V-shaped groove 6.3 are also arranged in 180° bidirectional symmetry, the structure that the rectangular jet window 2.2 of the first jet disc is opposite to the second V-shaped groove 6.3 of the deflector plate, and the rectangular jet window 4.2 of the second jet disc is opposite to the first V-shaped groove 6.2 of the deflector plate is formed. When two liquid flows are respectively shot from the rectangular jet windows and are 180° opposite to the deflector plate 6, the high-speed shot oil liquid impacts the deflector plate, and the kinetic energy of the oil liquid is converted into the pressure energy received by the deflector plate. Since the sizes of the jet windows on both sides are consistent, the speeds of the jets are also the same, so the liquid flow forces received by the deflector plate are the same in size and opposite in direction, and are offset to each other, thereby compensating for the liquid flow force asymmetry problem caused by the single jet.

[0076] The application provides a novel double-jet port type deflector plate hydraulic amplification structure with a liquid flow force compensation effect, which is different from a traditional deflector plate hydraulic amplification structure. The novel structure adopts a double-jet disc type jet form, the output flow is significantly increased, the left and right receiver pressures are significantly improved, and the novel structure also has the advantage of high control margin. The novel deflector plate hydraulic amplification structure adopts bidirectional symmetric configuration of a jet window and a V-shaped groove, and bidirectional jets simultaneously impact the deflector plate, so that the liquid flow forces on the deflector plate are offset to each other, and the stability of the deflector plate movement is improved.

[0077] The above only describes the preferred embodiments of the application, and it should be noted that, for ordinary skilled in the art, some improvements can be made without departing from the principles of the application, and these improvements should also be considered as the protection scope of the application.

Claims

1. A hydraulic amplification structure with a dual-jet deflector plate and fluid force compensation, characterized in that, The system includes a deflection plate (6), an upper cover plate (5), a second jet plate (4), an oil circuit valve block (3), a first jet plate (2), and a lower cover plate (1). The upper cover plate (5), the second jet plate (4), the oil circuit valve block (3), the first jet plate (2), and the lower cover plate (1) are stacked from top to bottom. The upper cover plate (5), the second jet plate (4), the oil circuit valve block (3), the first jet plate (2), and the lower cover plate (1) have a vertically penetrating center. The deflection plate (6) is inserted into the deflection plate mounting slot; the lower cover plate (1) is provided with an oil inlet and an oil outlet. After the oil enters from the oil inlet, it is divided into two paths. One path is pressurized by the first jet plate (2) and then connected to the oil outlet. The other path is transmitted to the second jet plate (4) through the oil circuit valve block (3) and then pressurized and connected to the oil outlet. The pressurization directions of the first jet plate (2) and the second jet plate (4) are opposite and they collide on the deflection plate (6). The lower cover plate (1) includes a lower cover plate oil inlet hole (1.1), a lower cover plate oil return hole (1.2), a lower cover plate jet expansion groove (1.3), a right receiving hole (1.4), and a left receiving hole (1.5); wherein, the outer side of the oil inlet hole (1.1) communicates with the hydraulic system oil supply circuit, and the inner side connects to the internal oil circuit of this structure; the oil return hole (1.2) communicates with the hydraulic system oil return circuit, and the oil return hole (1.2) is part of the deflection plate mounting groove; the jet expansion groove (1.3) is a rectangular blind groove structure that reduces jet resistance and is laterally arranged on the side of the oil return hole (1.2); the right receiving hole (1.4) communicates with the right side cavity of the controlled spool valve or actuator, and the left receiving hole (1.5) communicates with the left side cavity of the controlled spool valve or actuator, and both the right receiving hole (1.4) and the left receiving hole (1.5) are oil outlet holes; The first jet plate (2) includes an oil inlet tapering orifice (2.1), a rectangular jet window (2.2), a first jet plate return oil hole (2.3), a right receiver (2.4), a flow splitting wedge (2.5), and a left receiver (2.6); the oil inlet tapering orifice (2.1) connects to the lower oil inlet hole and is laterally connected to the rectangular jet window (2.2), which is a narrow oil passage and connects to the rear end of the first jet plate return oil hole (2.3). The return oil hole (2.3) of the jet plate is part of the deflector plate mounting groove. After the oil is pressurized from the rectangular jet window (2.2), it is ejected from the deflector plate (6) to the split wedge (2.5) at the rear end. The split wedge (2.5) cuts the oil into two oil paths, which enter the right receiver (2.4) and the left receiver (2.6) respectively. The right receiver (2.4) is connected to the right receiving hole (1.4), and the left receiver (2.6) is connected to the left receiving hole (1.5).

2. The hydraulic amplification structure of a dual-jet deflector plate with fluid force compensation according to claim 1, characterized in that, The second jet disk (4) and the first jet disk (2) are two jet disks with the same structure but installed in opposite horizontal directions at 180°.

3. The hydraulic amplification structure of a dual-jet deflector plate with fluid force compensation according to claim 2, characterized in that, The oil circuit valve block (3) includes the following internal components: a second jet inlet oil circuit (3.1), a first jet left receiver oil circuit (3.2), a left receiver communication oil circuit (3.3), a second jet left receiver oil circuit (3.4), an inlet communication oil circuit (3.5), a first jet right receiver oil circuit (3.6), a right receiver communication oil circuit (3.7), a second jet right receiver oil circuit (3.8), and a first jet inlet oil circuit (3.9). The second jet inlet oil circuit (3.1) is connected to the first jet inlet oil circuit (3.9) through the inlet communication oil circuit (3.5). The upper end of the second jet inlet oil circuit (3.1) is connected to the oil inlet hole of the second jet disk (4), and the lower end of the first jet inlet oil circuit (3.9) is connected to the oil inlet hole of the first jet disk (2). The first jet left receiver oil circuit (3.9) is connected to the oil inlet hole of the first jet disk (2). The receiver oil circuit (3.2) is connected to the left receiver communication oil circuit (3.3) and the second jet left receiver oil circuit (3.4) through the left receiver communication oil circuit (3.3). The lower end of the first jet left receiver oil circuit (3.2) is connected to the left receiver (2.6) of the first jet disk (2). The upper end of the second jet left receiver oil circuit (3.4) is connected to the left receiver (4.6) of the second jet disk (4). The first jet right receiver oil circuit (3.6) is connected to the right receiver communication oil circuit (3.7) and the second jet right receiver oil circuit (3.8) through the right receiver communication oil circuit (3.7). The lower end of the first jet right receiver oil circuit (3.6) is connected to the right receiver (2.4) of the first jet disk (2). The upper end of the second jet right receiver oil circuit (3.8) is connected to the right receiver (4.4) of the second jet disk (4).

4. The hydraulic amplification structure of a dual-jet deflector plate with fluid force compensation according to claim 1, characterized in that, The upper cover plate (5) includes an upper cover plate return oil hole (5.1) and an upper cover plate jet expansion groove (5.2). The upper cover plate return oil hole (5.1) communicates with the hydraulic system return oil circuit through the lower circular return oil passage and is part of the deflection plate mounting groove. The upper cover plate jet expansion groove (5.2) is a rectangular blind groove structure that reduces jet resistance and is laterally located on the side of the upper cover plate return oil hole (5.1).

5. The hydraulic amplification structure of a dual-jet deflector plate with fluid force compensation according to claim 2, characterized in that, The deflection plate (6) includes a torque transmission guide rod (6.1), a first V-groove (6.2), and a second V-groove (6.3). The first V-groove (6.2) and the second V-groove (6.3) are both through grooves that pass through the side, with a large inlet and a small outlet, forming a V-shaped structure in the cross section. The first V-groove (6.2) and the second V-groove (6.3) are respectively located at the height of the torque transmission guide rod (6.1) corresponding to the second jet disk (4) and the first jet disk (2). The inlet and outlet directions of the first V-groove (6.2) and the second V-groove (6.3) are opposite. The inlet direction of the first V-groove (6.2) is aligned with the direction of the oil inlet converging hole of the second jet disk (4), and the inlet direction of the second V-groove (6.3) is aligned with the direction of the oil inlet converging hole (2.1) of the first jet disk (2).

6. The hydraulic amplification structure of a dual-jet deflector plate with fluid force compensation according to claim 5, characterized in that, The included angle between the two side walls of the first V-groove (6.2) and the second V-groove (6.3) is 145°.

7. The hydraulic amplification structure of a dual-jet deflector plate with fluid force compensation according to claim 2, characterized in that, The deflection plate (6) has a certain gap from the oil return hole of the second jet plate (4) and the oil return hole of the first jet plate (2).

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