LU500751B1

LU500751B1 - 2d high-speed reversing valve for electro-hydraulic excitation device

Info

Publication number: LU500751B1
Application number: LU500751A
Authority: LU
Inventors: Huang Sen; He Tao; Wang Chuanli; Hao Shen; Zhao Kaiping; Bo Xu; Chen Qiangman
Original assignee: Univ Anhui Sci & Technology
Priority date: 2020-11-24
Filing date: 2021-10-18
Publication date: 2022-04-19
Also published as: CN112344056A

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 excitation device. The 2D high-speed reversing valve includes a rotary motor, a coupler, a coupler mounting base, a sealing port, a spring bushing, a return spring, a thrust bearing, a valve spool, a valve sleeve, a valve body, a linear motor shaft sleeve, and a linear motor. The 2D high-speed reversing valve for an electro-hydraulic excitation device of the present invention realizes high frequency reversing by means of rotation of a valve spool driven by the rotary motor, so as to realize frequency modulation of the excitation device, and adjusts an opening size of a related valve port by means of an axial movement of the valve spool driven by the linear motor, so as to realize control of a vertical offset of an excitation waveform of the excitation device. In this way, the excitation device is convenient to adjust and a hydraulic system is simplified.

Description

2D HIGH-SPEED REVERSING VALVE FOR ELECTRO-HYDRAULIC “00751

EXCITATION DEVICE

TECHNICAL FIELD The present invention relates to the technical field of 2D hydraulic valves, and in particular, toa 2D high-speed reversing valve for an electro-hydraulic excitation device.

BACKGROUND An exciting device is an apparatus configured to generate corresponding vibrations under mechanical driving, electric driving, electrostrictive or magnetostrictive driving, electro- hydraulic driving, or the like, which mainly has two forms: a vibrostand and an exciter. By virtue of advantages such as a large output power, a large displacement, a large thrust, a large load adaptivity, and a large quantity of controllable parameters, an electro-hydraulic excitation device is widely applicable to simulation tests in many large-scale vibration environments such as engineering machinery, nuclear industry, and seismic wave reproduction. Compared with a traditional elastic exciter, a traditional inertial exciter, and a traditional electromagnetic exciter, the electro-hydraulic vibration exciter has advantages such as stepless amplitude modulation, stepless frequency modulation, adjustability of a vertical offset of an excitation waveform, and system simplification. A 2D reversing valve spool has two degrees of freedom: linear movement and linear rotation. By changing relative positions of a valve spool and a valve sleeve, reversing of an oil path is controlled and an opening size of a valve port is adjusted. A traditional electro-hydraulic reversing valve and a traditional electromagnetic reversing valve have low response speeds, low reversing frequencies, and small opening degrees of valve ports, and cannot control an excitation waveform deviation of the electro-hydraulic excitation device, failing to satisfy requirements of the electro-hydraulic excitation device and other hydraulic systems requiring continuous high frequency reversing and adjustment of an opening degree of a valve port.

SUMMARY In order to resolve the problems mentioned in the background, the present invention aims to provide a 2D high-speed reversing valve for an electro-hydraulic excitation device, which realizes high frequency reversing by means of rotation of a valve spool, so as to realize frequency modulation of the excitation device, and adjusts an opening size of a related valve port by means of an axial movement of the valve spool, so as to realize control of a vertical offset of an excitation waveform of the excitation device. In this way, the excitation device is convenient to adjust and a hydraulic system is simplified. 1

The objective of the present invention can be achieved by the following technical solution: LVS00751 A 2D high-speed reversing valve for an electro-hydraulic excitation device includes a rotary motor, a coupler, a coupler mounting base, a sealing port, a spring bushing, a return spring, a thrust bearing, a valve spool, a valve sleeve, a valve body, a linear motor shaft sleeve, and a linear motor.

The valve spool and the valve sleeve are coaxially mounted. The valve sleeve is fixed to a hole in the valve body. The valve spool and the valve sleeve constitute a cylindrical pair. The valve spool rotates coaxially relative to the valve sleeve under driving of the rotary motor, and moves axially relative to the valve sleeve under driving of the linear motor.

À valve port I, a valve port II, a valve port III and a valve port IV are provided on the valve body.

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 are provided on the valve sleeve. The valve sleeve oil port I and the valve sleeve oil port II are coaxially distributed, the valve sleeve oil port III and the valve sleeve oil port IV are coaxially distributed, and the valve sleeve oil port I and the valve sleeve oil port II and 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 in communication with the valve port I, the valve port IL, the valve port III, and the valve port IV.

À through opening I and a through opening II are provided on the valve spool. An inner side of each of the through openings is arcuate. A rectangular notch I, a rectangular notch II, a rectangular notch III, and a rectangular notch IV are provided on a surface of the valve spool. The rectangular notch I is in communication with the rectangular notch IT, and the rectangular notch III is in communication with the rectangular notch IV. The through opening I and the through opening II are coaxially distributed. The rectangular notch I and the rectangular notch IT are coaxially distributed. The rectangular notch III and the rectangular notch IV are coaxially distributed. The rectangular notch I and the rectangular notch IT and the rectangular notch III and the rectangular notch IV are symmetrically distributed on the surface of the valve spool and are axially staggered from the through opening I and the through opening II. The through opening I and the through opening II that are coaxially distributed, the rectangular notch I and the rectangular notch II that are coaxially distributed, and the rectangular notch III and the rectangular notch IV that are coaxially distributed are evenly distributed on the surface of the valve spool in a circumferential direction. The through openings and the rectangular notches are in selective communication with the valve sleeve oil ports.

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Further, preferably, on the surface of the valve spool, each of the through openings has the LU500751 same axial length and circumferential radian as each of the rectangular notches, adjacent through openings have the same axial gap as adjacent rectangular notches, and an axial distance by which the through opening and the rectangular notch that are adjacent to each other are staggered from each other is half the each axial length of the through opening or the each rectangular notch.

Further, preferably, on a surface of the valve sleeve, an axial length of each of the valve sleeve oil ports is half the axial length of the each through opening or the each rectangular notch of the valve spool, and a circumferential radian of the each valve sleeve oil port is the same as a circumferential radian of a gap between the through opening I and the rectangular notch I on the surface of the valve spool that are adjacent to each other.

Beneficial effects of the present invention are as follows: (1) The 2D high-speed reversing valve for an electro-hydraulic excitation device realizes high-frequency reversing and adjustment of an opening degree of a valve port by means of two-dimensional motion. The 2D high-speed reversing valve has many advantages such as a compact structure, convenience in operation, control integration, energy saving and environmental protection, and a strong adaptability.

(2) The 2D high-speed reversing valve for an electro-hydraulic excitation device has a novel valve spool structure with the through opening and the rectangular notch. By means of rotary movement of the valve spool, the through opening and the rectangular notch of the valve spool are continuously connected to the valve sleeve oil port in a staggered manner, realizing stepless adjustment of a reversing frequency. The structure has desirable reliability, a large flow, and stable control.

(3) The through opening I and the through opening II that are coaxially distributed, the rectangular notch I and the rectangular notch II that are coaxially distributed, and the rectangular notch III and the rectangular notch IV that are coaxially distributed on the surface of valve spool of the 2D high-speed reversing valve for an electro-hydraulic excitation device are distributed in a staggered manner in an axial direction. When the valve spool is moved leftward, a communication region between the corresponding valve sleeve oil port and the corresponding rectangular notch of the valve spool remains unchanged, and a communication region between the corresponding valve sleeve oil port and the through opening of the valve spool decreases. When the valve spool is moved rightward, a communication region between the corresponding valve sleeve oil port and the corresponding through opening of the valve spool remains unchanged, and a communication region between the corresponding valve sleeve 3 oil port and the corresponding rectangular notch of the valve spool decreases. In this way, a LU500751 vertical offset of an excitation waveform of the excitation device can be precisely controlled by means of precise control of an axial displacement of the valve spool, so as to overcome the failure of the existing reversing valve to control the vertical offset of the excitation waveform in real time.

BRIEF DESCRIPTION OF THE DRAWINGS The following further describes the present invention in detail with reference to the accompanying drawings. FIG. 1 1s a schematic diagram of an internal overall structure according to the present invention.

FIG. 2 is a schematic structural diagram of a valve spool according to the present invention.

FIG. 3 is a schematic structural diagram of a valve spool according to the present invention after being rotated by 90°.

FIG. 4 is a cross-sectional view of a valve spool according to the present invention.

FIG. 5 is a cross-sectional view of a valve sleeve according to the present invention.

In the figures: 1-Rotary motor, 2-Coupler, 3-Coupler mounting base, 4-Sealing port, 5- Spring bushing, 6-Return spring, 7-Thrust bearing, 8-Valve 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-Valve sleeve, 91-Valve sleeve oil port I, 92-Valve sleeve oil port IT, 93-Valve sleeve oil port III, 94-Valve 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 shaft sleeve, 12- Linear motor.

DETAILED DESCRIPTION The technical solutions of embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by persons 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.

In the description of the present invention, it should be understood that orientation or position relationships indicated by the terms such as "opening", "left", "right", "length", "inner", "radian", "axial", and "circumferential" are used only for ease and brevity of illustration and description, rather than indicating or implying that the mentioned component or element need to have a particular orientation or need to be constructed and operated in a particular orientation.

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Therefore, such terms should not be construed as limiting of the present invention. LU500751 As shown in FIG. 1, a 2D high-speed reversing valve for an electro-hydraulic excitation device includes a rotary motor 1, a coupler 2, a coupler mounting base 3, a sealing port 4, a spring bushing 5, a return spring 6, a thrust bearing I 701, a thrust bearing II 702, a valve spool 8, a valve sleeve 9, a valve body 10, a linear motor shaft sleeve 11, and a linear motor 12. The valve spool 8 and the valve sleeve 9 are coaxially mounted. The valve sleeve 9 is fixed to a hole in the valve body 10. The valve spool 8 and the valve sleeve 9 constitute a cylindrical pair. The thrust bearing I 701, the spring bushing 5, the return spring 6, and the sealing port 4 are mounted to a left side of the valve spool 8. The coupler mounting base 3 is located on a left end of the valve body 10 and is fastened to the valve body 10 by using screws. A left shaft of the valve spool 8 is connected to the rotary motor 1 by using the coupler 2. The rotary motor 1 is tightly connected to the coupler mounting base 3 by using screws. The thrust bearing II 702 and the linear motor shaft sleeve 11 are mounted to a right end of the valve spool 8. The linear motor 12 is mounted to a right end of the valve body 10 and is fastened to the valve body 10 by using screws. As shown in FIG. 1, a valve port 1 101, a valve port II 102, a valve port III 103, and a valve port IV 104 are provided on the valve body 10. As shown in FIG. 1 and FIG. 5, 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 are provided on the valve sleeve

9. The valve sleeve oil port I 91 and the valve sleeve oil port II 92 are coaxially distributed, the valve sleeve oil port III 93 and the valve sleeve oil port IV 94 are coaxially distributed, and the valve sleeve oil port I 91 and the valve sleeve oil port II 92 and the valve sleeve oil port III 93 and 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 communication with the valve port I 101, the valve port II 102, the valve port III 103, and the valve port IV 104. As shown in FIG. 2, FIG. 3 and FIG. 4, a through opening I 85 and a through opening II 86 are provided on the valve spool 8. An inner side of each of the through openings 1s arcuate. À rectangular notch I 81, a rectangular notch II 82, a rectangular notch III 83, and a rectangular notch IV 84 are provided on a surface of the valve spool 8. The rectangular notch I 81 is in communication with the rectangular notch II 82, and the rectangular notch III 83 is in communication with the rectangular notch IV 84. The through opening I 85 and the through opening II 86 are coaxially distributed. The rectangular notch I 81 and the rectangular notch II 82 are coaxially distributed. The rectangular notch III 83 and the rectangular notch IV 84 are 5 coaxially distributed. The rectangular notch I 81 and the rectangular notch II 82 and the LU500751 rectangular notch III 83 and the rectangular notch IV 84 are symmetrically distributed on the surface of the valve spool 8 and are axially staggered from the through opening I 85 and the through opening II 86. The through opening I 85 and the through opening II 86 that are coaxially distributed, the rectangular notch I 81 and the rectangular notch II 82 that are coaxially distributed, and the rectangular notch III 83 and the rectangular notch IV 84 that are coaxially distributed are evenly distributed on the surface of the valve spool 8 in a circumferential direction. The through openings and the rectangular notches are in selective communication with the valve sleeve oil ports.

On the surface of the valve spool 8, each of the through openings has the same axial length and circumferential radian as each of the rectangular notches, adjacent through openings has the same axial gap as adjacent rectangular notches, and an axial distance by which the through opening and the rectangular notch that are adjacent to each other are staggered from each other is half the axial length of the each through opening or the each rectangular notch.

On a surface of the valve sleeve 9, an axial length of each of the valve sleeve oil ports is half the axial length of the each through opening or the each rectangular notch of the valve spool, and a circumferential radian of the each valve sleeve oil port is the same as a circumferential radian of a gap between the through opening I 85 and the rectangular notch I 81 on the surface of the valve spool that are adjacent to each other.

FIG. 1, FIG. 2, and FIG. 3 show a specific implementation as follows: At a valve position a: the valve port I 101 is in communication with the valve port II 102, the valve port IV 104 is in communication with the valve port III 103.

At a valve position b: the valve port I 101 is in communication with the valve port III 103, and the valve port IV 104 is communication with the valve port II 102.

At a valve position c: the valve spool 8 is moved axially until the valve sleeve oil port is completely shielded by the valve spool 8, which is a locked valve position.

By means of rotation of the valve spool, the 2D high-speed reversing valve performs continuous high-frequency switching between the valve position a and the valve position b. When the valve spool is rotated until the rectangular notch I 81 and the rectangular notch II 82 are connected to the valve sleeve oil port I 91 and the valve sleeve oil port II 92 respectively, since the rectangular notch I 81 and the rectangular notch II 82 are in communication with each other inside the valve spool 8, the valve port I 101 and the valve port II 102 are brought into communication. In this case, the rectangular notch III 83 and the rectangular notch IV 84 are respectively in communication with the valve sleeve oil port III 93 6 and the valve sleeve oil port IV 94. Since the rectangular notch III 83 and the rectangular notch LU500751 TV 84 are in communication with each other inside the valve spool 8, the valve port IV 104 and the valve port III 103 are brought into communication. The above is the valve position a. When the valve spool is further rotated by 90°, the valve sleeve oil port I 91 and the valve sleeve oil port III 93 are brought into communication by using the through opening I 85, so that the valve port I 101 and the valve port III 103 are brought into communication. The valve sleeve oil port II 92 and the valve sleeve oil port IV 94 are brought into communication by using the through opening II 86, so that the valve port IV 104 and the valve port II 102 are brought into communication. The above is the valve position b.

Since a circumferential radian of each of 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 is the same as a circumferential radian of a gap between the through opening I 85 and the rectangular notch I 81 on the surface of the valve spool 8 that are adjacent to each other, the 2D high-speed reversing valve can enter the valve position b immediately after completion at the valve position a each time and enter the valve position a immediately after completion at the valve position b, and can adjust a reversing frequency of the 2D high-speed reversing valve by adjusting a frequency of the rotary motor.

Since the through opening I 85 and the through opening II 86 that are coaxially distributed, the rectangular notch I 81 and the rectangular notch IT 82 that are coaxially distributed, and the rectangular notch III 83 and the rectangular notch IV 84 that are coaxially distributed on the surface of the valve spool 8 are distributed in a staggered manner in an axial direction, when the valve spool 8 is moved leftward, a communication region between the corresponding valve sleeve oil port and the corresponding rectangular notch of the valve spool remains unchanged, and a communication region between the corresponding valve sleeve oil port and the corresponding through opening of the valve spool decreases, so that a flow rate of at the valve position a remains unchanged, and a flow rate at the valve position b decreases. When the valve spool 8 is moved rightward, a communication region between the corresponding valve sleeve oil port and the corresponding through opening of the valve spool remains unchanged, and a communication region between the corresponding valve sleeve oil port and the corresponding rectangular notch of the valve spool decreases, so that a flow rate at the valve position a remains unchanged, and a flow rate at the valve position b decreases. In this way, a vertical offset of an excitation waveform of the excitation device can be precisely controlled by means of precise control of an axial displacement of the valve spool 8.

The foregoing displays and describes basic principles, main features, and advantages of 7 the present invention.

A person skilled in the art may understand that the present invention is LU500751 not limited in the foregoing embodiments.

Descriptions in the embodiments and this specification only illustrate the principles of the present invention.

Various modifications and improvements are made in the present invention without departing from the spirit and the scope of the present invention, and these modifications and improvements shall fall within the protection scope of the present invention. 8

Claims

CLAIMS LU500751 What is claimed is:

1. A 2D high-speed reversing valve for an electro-hydraulic excitation device, the 2D high-speed reversing valve comprising: a rotary motor (1), a coupler (2), a coupler mounting base (3), a sealing port (4), a spring bushing (5), a return spring (6), a thrust bearing (7), a valve spool (8), a valve sleeve (9), a valve body (10), a linear motor shaft sleeve (11), and a linear motor (12), wherein a valve port I (101), a valve port IT (102), a valve port III (103), and a valve port IV (104) are provided on the valve body (10); 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) are provided on the valve sleeve (9), the valve sleeve oil port I (91) and the valve sleeve oil port (92) are coaxially distributed, the valve sleeve oil port III (93) and the valve sleeve oil port IV (94) are coaxially distributed, the valve sleeve oil port I (91) and the valve sleeve oil port (92) and the valve sleeve oil port III (93) and the valve sleeve oil port IV (94) are symmetrically distributed, and 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 communication with the valve port I (101), the valve port II (102), the valve port III (103), and the valve port IV(104); a through opening I (85) and a through opening II (86) are provided on the valve spool (8), an inner side of each of the through openings is arcuate, a rectangular notch I (81), a rectangular notch II (82), a rectangular notch III (83), and a rectangular notch IV (84) are provided on a surface of the valve spool (8), the rectangular notch I (81) is in communication with the rectangular notch IT (82), and the rectangular notch III (83) is in communication with the rectangular notch IV (84)., the through opening I (85) and the through opening II (86) are coaxially distributed, the rectangular notch I (81) and the rectangular notch II (82) are coaxially distributed, the rectangular notch III (83) and the rectangular notch IV (84) are coaxially distributed, the rectangular notch I (81) and the rectangular notch II (82) and the rectangular notch III (83), and the rectangular notch IV (84) are symmetrically distributed on the surface of the valve spool (8) and are axially staggered from the through opening I (85) and the through opening II (86), the through opening I (85) and the through opening II (86) that are coaxially distributed, the rectangular notch I (81) and the rectangular notch II (82) that are coaxially distributed, and the rectangular notch III (83) and the rectangular notch IV (84) that are coaxially distributed are uniformly distributed on the surface of the valve spool (8) in a circumferential direction; and the through openings and the rectangular notches are in selective 9 communication with the valve sleeve oil ports. LU500751

2. The 2D high-speed reversing valve for an electro-hydraulic excitation device according to claim 1, wherein on the surface of the valve spool (8), each of the through openings has the same axial length and circumferential radian as each of the rectangular notches, adjacent through openings have the same axial gap as adjacent rectangular notches, and an axial distance by which the through opening and the rectangular notch that are adjacent to each other are staggered from each other is half the axial length of the each through opening or the each rectangular notch.

3. The 2D high-speed reversing valve for an electro-hydraulic excitation device according to claim 1, wherein on a surface of the valve sleeve (9), an axial length of each of the valve sleeve oil ports is half the axial length of the each through opening or the each rectangular notch of the valve spool, and a circumferential radian of the each valve sleeve oil port is the same as a circumferential radian of a gap between the through opening I (85) and the rectangular notch I (81) on the surface of the valve spool that are adjacent to each other.

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