A 2D high-speed reversing valve for an electro-hydraulic vibration excitation device

Abstract

The present invention relates to the technical field of 2D hydraulic valves, and specifically discloses a 2D high-speed reversing valve for an electro-hydraulic vibration excitation device, which includes a rotary motor, a coupling, a coupling mounting seat, a sealing port, a spring bushing, a return spring, a thrust bearing, a valve core, a valve sleeve, a valve body, a linear motor bushing, and a linear motor. The 2D high-speed reversing valve for the electro-hydraulic vibration excitation device in the present invention drives the valve core to rotate through the rotary motor to achieve high-frequency commutation to realize frequency modulation of the vibration excitation device, and drives the valve core to axially move through the linear motor to adjust the opening degree of relevant valve ports, so as to control the vertical offset of the vibration waveform of the vibration excitation device, making the vibration excitation device easy to adjust and streamlining the hydraulic system.

Description

Technical Field

[0001] The present invention relates to the technical field of 2D hydraulic valves, and particularly to a 2D high-speed reversing valve for an electro-hydraulic vibration exciter device. Background Art

[0002] A vibration exciter device mainly refers to a device that uses principles such as mechanical, electric, electrostrictive or magnetostrictive effects, and electro-hydraulic to drive to generate corresponding vibrations, mainly existing in the forms of a vibration table and a vibration exciter. Due to advantages such as large output power, displacement, and thrust, load adaptability, and many controllable parameters, electro-hydraulic vibration exciter devices are widely used in many large-scale vibration environment simulation tests such as construction machinery, the nuclear industry, and seismic wave reproduction. Compared with traditional elastic vibration exciters, inertial vibration exciters, and electromagnetic vibration exciters, electro-hydraulic vibration exciters have advantages such as stepless amplitude modulation, frequency modulation, adjusting the vertical offset of the vibration excitation waveform, and simplifying the system.

[0003] The spool of a 2D reversing valve has two degrees of freedom of linear movement and rotation. By means of the relative position change between the spool and the valve sleeve, the oil circuit is controlled to change direction and the opening size of the valve port is adjusted. Since traditional electro-hydraulic reversing valves and electromagnetic reversing valves have slow response speeds, low commutation frequencies, small valve port openings, and are not easy to adjust, it is difficult to control the vertical offset of the vibration excitation waveform of the electro-hydraulic vibration exciter device. Therefore, they cannot meet the requirements of electro-hydraulic vibration exciter devices and other hydraulic systems that require continuous high-frequency commutation and adjustable valve port openings. Summary of the Invention

[0004] To solve the problems mentioned in the above background art, the purpose of the present invention is to provide a 2D high-speed reversing valve for an electro-hydraulic vibration exciter device. By rotating the spool to achieve high-frequency commutation to realize frequency modulation of the vibration exciter device, and by axially moving the spool to adjust the opening size of relevant valve ports, the vertical offset of the vibration excitation waveform of the vibration exciter device is controlled, making the vibration exciter device easy to adjust and streamlining the hydraulic system.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A 2D high-speed reversing valve for an electro-hydraulic vibration exciter device includes a rotary motor, a coupling, a coupling mounting seat, a sealing port, a spring bushing, a return spring, a thrust bearing, a spool, a valve sleeve, a valve body, a linear motor bushing, and a linear motor;

[0007] The spool and the valve sleeve are coaxially installed. The valve sleeve is fixed on the inner hole of the valve body. The spool and the valve sleeve form a cylindrical pair. The spool rotates coaxially relative to the valve sleeve driven by the rotary motor, and the spool moves axially relative to the valve sleeve driven by the linear motor;

[0008] The valve body is provided with valve port I, valve port II, valve port III, and valve port IV;

[0009] The valve sleeve is provided with a valve sleeve oil port I, a valve sleeve oil port II, a valve sleeve oil port III, and a valve sleeve oil port IV. The valve sleeve oil port I and the valve sleeve oil port II are axially distributed, the valve sleeve oil port III and the valve sleeve oil port IV are axially distributed, and the valve sleeve oil port I, the valve sleeve oil port II, the valve sleeve oil port III, and the valve sleeve oil port IV are symmetrically distributed; the valve sleeve oil port I, the valve sleeve oil port II, the valve sleeve oil port III, and the valve sleeve oil port IV are respectively corresponding and communicated with the valve port I, the valve port II, the valve port III, and the valve port IV;

[0010] The valve core is provided with a through opening I and a through opening II. One side inside the through opening is arc-shaped. The valve core surface is provided with a rectangular notch I, a rectangular notch II, a rectangular notch III, and a rectangular notch IV. The rectangular notch I and the rectangular notch II are communicated, and the rectangular notch III and the rectangular notch IV are communicated; the through opening I and the through opening II are axially distributed, the rectangular notch I and the rectangular notch II are axially distributed, the rectangular notch III and the rectangular notch IV are axially distributed, and the rectangular notch I, the rectangular notch II, the rectangular notch III, and the rectangular notch IV are symmetrically distributed on the valve core surface and are axially offset from the through opening I and the through opening II; the axially distributed through opening I and through opening II, the axially distributed rectangular notch I and rectangular notch II, and the axially distributed rectangular notch III and rectangular notch IV are circumferentially and uniformly distributed on the valve core surface; the through opening and the rectangular notch are selectively communicated with the valve sleeve oil port;

[0011] Further preferably, on the valve core surface, the axially lengths and circumferential radian of the through opening and the rectangular notch are the same, the axial distances between adjacent through openings and adjacent rectangular notches are the same, and the axial offset distance between adjacent through openings and rectangular notches is half of the axial length of the through opening or the rectangular notch;

[0012] Further preferably, on the valve sleeve surface, the axial length of the valve sleeve oil port is half of the axial length of the through opening or the rectangular notch of the valve core, and the circumferential radian of the valve sleeve oil port is the same as the circumferential spacing radian between the adjacent through opening I and rectangular notch I on the valve core surface.

[0013] The beneficial effects of the present invention:

[0014] (1) The 2D high-speed reversing valve for the electro-hydraulic vibration excitation device realizes high-frequency commutation and valve opening adjustment through two-dimensional movement, and has many advantages such as compact structure, simple operation, control integration, energy conservation and environmental protection, and strong adaptability.

[0015] (2) The 2D high-speed reversing valve for the electro-hydraulic vibration excitation device proposes a novel valve core structure with through openings and rectangular notches. Through the rotational movement of the valve core, the through openings and rectangular notches of the valve core are continuously and alternately communicated with the valve sleeve oil ports, realizing stepless adjustment of the commutation frequency. This structure has good reliability, large flow rate and stable control.

[0016] (3) The 2D high-speed reversing valve for the electro-hydraulic vibration exciter has axially staggered distributions of the through openings Ⅰ and Ⅱ on the spool surface in the axial direction, the rectangular notches Ⅰ and Ⅱ in the axial direction, and the rectangular notches Ⅲ and Ⅳ in the axial direction. When the spool moves to the left, the communication area between the corresponding sleeve oil port and the rectangular notch of the spool remains unchanged, and the communication area with the through opening of the spool decreases; when the spool moves to the right, the communication area between the corresponding sleeve oil port and the through opening of the spool remains unchanged, and the communication area with the rectangular notch of the spool decreases, so as to control different through-flow rates of the reversing circuit. Furthermore, the vertical offset of the vibration waveform of the vibration exciter can be accurately controlled by precisely controlling the axial displacement of the spool, so as to overcome the problem that it is difficult for the existing reversing valve to control the vertical offset of the vibration waveform in real time. Description of the Drawings

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 Schematic diagram of the overall internal structure of the present invention;

[0019] Figure 2 Schematic diagram of the spool structure of the present invention;

[0020] Figure 3 Schematic diagram of the structure of the spool of the present invention after rotating 90°;

[0021] Figure 4 Cross-sectional view of the spool of the present invention;

[0022] Figure 5 Cross-sectional view of the sleeve of the present invention.

[0023] In the figure: 1 - rotating motor, 2 - coupling, 3 - coupling mounting seat, 4 - sealing port, 5 - spring bushing, 6 - return spring, 7 - thrust bearing, 8 - spool, 81 - rectangular notch Ⅰ, 82 - rectangular notch Ⅱ, 83 - rectangular notch Ⅲ, 84 - rectangular notch Ⅳ, 85 - through opening Ⅰ, 86 - through opening Ⅱ, 9 - sleeve, 91 - sleeve oil port Ⅰ, 92 - sleeve oil port Ⅱ, 93 - sleeve oil port Ⅲ, 94 - sleeve oil port Ⅳ, 10 - valve body, 101 - valve port Ⅰ, 102 - valve port Ⅱ, 103 - valve port Ⅲ, 104 - valve port Ⅳ, 11 - linear motor bushing, 12 - linear motor. Detailed Embodiment

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be understood that terms such as "opening", "left", "right", "length", "inner", "radian", "axial direction", "circumferential direction", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0026] As Figure 1 shown, a 2D high-speed reversing valve for an electro-hydraulic vibration excitation device includes a rotary motor 1, a coupling 2, a coupling mounting seat 3, a sealing port 4, a spring bushing 5, a return spring 6, a thrust bearing 7, a valve core 8, a valve sleeve 9, a valve body 10, a linear motor bushing 11, and a linear motor 12.

[0027] The valve core 8 and the valve sleeve 9 are coaxially installed. The valve sleeve 9 is fixed on the inner hole of the valve body 10. The valve core 8 and the valve sleeve 9 form a cylindrical pair. A thrust bearing 7, a spring bushing 5, a return spring 6, and a sealing port 4 are respectively installed at the left end of the valve core 8. The coupling mounting seat 3 is located at the left end of the valve body 10 and is fixedly connected to the valve body 10 with screws. The left end shaft of the valve core 8 is connected to the rotary motor 1 through the coupling 2, and the rotary motor 1 is fixedly connected to the coupling mounting seat 3 with screws. Thrust bearings 7 and a linear motor bushing 11 are respectively installed at the right end of the valve core 8. The linear motor 12 is installed at the right end of the valve body 10 and is fixedly connected to the valve body 10 with screws.

[0028] As Figure 1 shown, the valve body 10 is provided with a valve port Ⅰ 101, a valve port Ⅱ 102, a valve port Ⅲ 103, and a valve port Ⅳ 104.

[0029] As Figure 1 and Figure 5 shown, the valve sleeve 9 is provided with a valve sleeve oil port Ⅰ 91, a valve sleeve oil port Ⅱ 92, a valve sleeve oil port Ⅲ 93, and a valve sleeve oil port Ⅳ 94. The valve sleeve oil port Ⅰ 91 and the valve sleeve oil port Ⅱ 92 are axially distributed, the valve sleeve oil port Ⅲ 93 and the valve sleeve oil port Ⅳ 94 are axially distributed, and the valve sleeve oil port Ⅰ 91, the valve sleeve oil port Ⅱ 92 and the valve sleeve oil port Ⅲ 93, the valve sleeve oil port Ⅳ 94 are symmetrically distributed; the valve sleeve oil port Ⅰ 91, the valve sleeve oil port Ⅱ 92, the valve sleeve oil port Ⅲ 93, and the valve sleeve oil port Ⅳ 94 are respectively in corresponding communication with the valve port Ⅰ 101, the valve port Ⅱ 102, the valve port Ⅲ 103, and the valve port Ⅳ 104.

[0030] As Figure 2 , Figure 3 and Figure 4As shown, the valve core 8 is provided with a through opening Ⅰ85 and a through opening Ⅱ86. One side inside the through opening is arc-shaped. On the surface of the valve core 8, there are a rectangular notch Ⅰ81, a rectangular notch Ⅱ82, a rectangular notch Ⅲ83, and a rectangular notch Ⅳ84. The rectangular notch Ⅰ81 communicates with the rectangular notch Ⅱ82, and the rectangular notch Ⅲ83 communicates with the rectangular notch Ⅳ84. The through opening Ⅰ85 and the through opening Ⅱ86 are axially distributed. The rectangular notch Ⅰ81 and the rectangular notch Ⅱ82 are axially distributed. The rectangular notch Ⅲ83 and the rectangular notch Ⅳ84 are axially distributed. The rectangular notch Ⅰ81, the rectangular notch Ⅱ82, the rectangular notch Ⅲ83, and the rectangular notch Ⅳ84 are symmetrically distributed on the surface of the valve core 8 and are axially offset from the through opening Ⅰ85 and the through opening Ⅱ86. The axially distributed through opening Ⅰ85 and through opening Ⅱ86, the axially distributed rectangular notch Ⅰ81 and rectangular notch Ⅱ82, and the axially distributed rectangular notch Ⅲ83 and rectangular notch Ⅳ84 are circumferentially and evenly distributed on the surface of the valve core 8. The said through opening and rectangular notch are selectively communicated with the valve sleeve oil port.

[0031] On the surface of the valve core 8, the axially lengths and circumferential arcs of the through opening and the rectangular notch are the same. The axial distances between adjacent through openings and adjacent rectangular notches are the same. The axial offset distance between an adjacent through opening and a rectangular notch is half of the axial length of the through opening or the rectangular notch.

[0032] On the surface of the valve sleeve 9, the axial length of the valve sleeve oil port is half of the axial length of the through opening or the rectangular notch of the valve core. The circumferential arc of the valve sleeve oil port is the same as the circumferential pitch arc between the adjacent through opening Ⅰ85 and the rectangular notch Ⅰ81 on the surface of the valve core.

[0033] As Figure 1 、 Figure 2 and Figure 3 shown, the specific implementation method is as follows:

[0034] a valve position: The valve port Ⅰ101 communicates with the valve port Ⅱ102, and the valve port Ⅳ104 communicates with the valve port Ⅲ103.

[0035] b valve position: The valve port Ⅰ101 communicates with the valve port Ⅲ103, and the valve port Ⅳ104 communicates with the valve port Ⅱ102.

[0036] c valve position: The valve core 8 axially moves until the valve sleeve oil port is completely blocked by the valve core 8, and this is the locking valve position.

[0037] By rotating the valve core, the 2D high-speed reversing valve continuously and high-frequency switches between the a valve position and the b valve position.

[0038] When the valve core rotates to make the rectangular notch Ⅰ81 and the rectangular notch Ⅱ82 communicate with the valve sleeve oil port Ⅰ91 and the valve sleeve oil port Ⅱ92 respectively, since the rectangular notch Ⅰ81 and the rectangular notch Ⅱ82 communicate inside the valve core 8, the communication between the valve port Ⅰ101 and the valve port Ⅱ102 is realized; at this time, the rectangular notch Ⅲ83 and the rectangular notch Ⅳ84 communicate with the valve sleeve oil port Ⅲ93 and the valve sleeve oil port Ⅳ94 respectively, and since the rectangular notch Ⅲ83 and the rectangular notch Ⅳ84 communicate inside the valve core 8, the communication between the valve port Ⅳ104 and the valve port Ⅲ103 is realized. This is the a valve position.

[0039] When the valve core continues to rotate 90°, the valve sleeve oil port Ⅰ91 and the valve sleeve oil port Ⅲ93 are communicated through the through opening Ⅰ85, so the communication between the valve port Ⅰ101 and the valve port Ⅲ103 is realized; the valve sleeve oil port Ⅱ92 and the valve sleeve oil port Ⅳ94 are communicated through the through opening Ⅱ86, so the communication between the valve port Ⅳ104 and the valve port Ⅱ102 is realized. This is the b valve position.

[0040] Since the circumferential radian of the valve sleeve oil port Ⅰ91, the valve sleeve oil port Ⅱ92, the valve sleeve oil port Ⅲ93, and the valve sleeve oil port Ⅳ94 is the same as the circumferential pitch radian between the adjacent through opening Ⅰ85 and the rectangular notch Ⅰ81 on the surface of the valve core 8, it can ensure that the 2D high-speed reversing valve immediately enters the b valve position at the end of each a valve position and immediately enters the a valve position at the end of the b valve position. By adjusting the rotation motor frequency, the commutation frequency of the 2D high-speed reversing valve can be adjusted.

[0041] Since the axially distributed through opening Ⅰ85, through opening Ⅱ86 on the surface of the valve core 8 and the axially distributed rectangular notch Ⅰ81, rectangular notch Ⅱ82 and the axially distributed rectangular notch Ⅲ83, rectangular notch Ⅳ84 are axially staggered, when the valve core 8 moves to the left, the communication area between the corresponding valve sleeve oil port and the rectangular notch of the valve core remains unchanged, and the communication area with the through opening of the valve core decreases, realizing that the flow rate in the a valve position remains unchanged and the flow rate in the b valve position decreases; when the valve core 8 moves to the right, the communication area between the corresponding valve sleeve oil port and the through opening of the valve core remains unchanged, and the communication area with the rectangular notch of the valve core decreases, realizing that the flow rate in the b valve position remains unchanged and the flow rate in the a valve position decreases. Furthermore, by precisely controlling the axial displacement of the valve core 8, the vertical offset of the vibration waveform of the vibration device can be precisely controlled.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A 2D high-speed reversing valve for an electro-hydraulic vibration excitation device, characterized in that, It includes a rotary motor (1), a coupling (2), a coupling mounting seat (3), a sealing port (4), a spring bushing (5), a return spring (6), a thrust bearing (7), a valve core (8), a valve sleeve (9), a valve body (10), a linear motor bushing (11), and a linear motor (12); The valve body (10) is provided with a valve port I (101), a valve port II (102), a valve port III (103), and a valve port IV (104); The valve sleeve (9) is provided with a valve sleeve oil port I (91), a valve sleeve oil port II (92), a valve sleeve oil port III (93), and a valve sleeve oil port IV (94). The valve sleeve oil port I (91) and the valve sleeve oil port II (92) are axially distributed, the valve sleeve oil port III (93) and the valve sleeve oil port IV (94) are axially distributed, and the valve sleeve oil port I (91), the valve sleeve oil port II (92) and the valve sleeve oil port III (93), the valve sleeve oil port IV (94) are symmetrically distributed; the valve sleeve oil port I (91), the valve sleeve oil port II (92), the valve sleeve oil port III (93), and the valve sleeve oil port IV (94) are respectively in corresponding communication with the valve port I (101), the valve port II (102), the valve port III (103), and the valve port IV (104); The valve core (8) is provided with a through opening I (85) and a through opening II (86). One side inside the through opening is arc-shaped. The surface of the valve core (8) is provided with a rectangular notch I (81), a rectangular notch II (82), a rectangular notch III (83), and a rectangular notch IV (84). The rectangular notch I (81) and the rectangular notch II (82) are in communication, and the rectangular notch III (83) and the rectangular notch IV (84) are in communication; the through opening I (85) and the through opening II (86) are axially distributed, the rectangular notch I (81) and the rectangular notch II (82) are axially distributed, the rectangular notch III (83) and the rectangular notch IV (84) are axially distributed, and the rectangular notch I (81), the rectangular notch II (82) and the rectangular notch III (83), the rectangular notch IV (84) are symmetrically distributed on the surface of the valve core (8) and are axially offset from the through opening I (85) and the through opening II (86); the axially distributed through opening I (85) and through opening II (86), the axially distributed rectangular notch I (81) and rectangular notch II (82), and the axially distributed rectangular notch III (83) and rectangular notch IV (84) are circumferentially and evenly distributed on the surface of the valve core (8), and the through opening and the rectangular notch are selectively in communication with the valve sleeve oil port; On the surface of the valve core (8), the axial lengths and circumferential arcs of the through opening and the rectangular notch are the same, the axial distances between adjacent through openings and adjacent rectangular notches are the same, and the axial offset distance between adjacent through openings and rectangular notches is half of the axial length of the through opening or the rectangular notch; On the surface of the valve sleeve (9), the axial length of the valve sleeve oil port is half of the axial length of the through opening or the rectangular notch of the valve core, and the circumferential arc of the valve sleeve oil port is the same as the circumferential pitch arc of the adjacent through opening I (85) and rectangular notch I (81) on the surface of the valve core.

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