CN-121993447-A - Centrifugal stability-increasing self-response high-sensitivity hydraulic speed regulating system

CN121993447ACN 121993447 ACN121993447 ACN 121993447ACN-121993447-A

Abstract

The invention provides a centrifugal stability-increasing type self-response high-sensitivity hydraulic speed regulation system, which relates to the technical field of hydraulic systems and comprises a hydraulic cylinder assembly, a motion conversion assembly, a baffle assembly, a single-nozzle baffle valve, a control valve assembly and an oil supply assembly, wherein when the rotating speed of a second rotating member is equal to a set rotating speed, the baffle is at a set position, and a first flow passage on a valve body is communicated with a second flow passage; when the rotating speed of the second rotating piece is lower than the set rotating speed, the baffle moves away from the nozzle flow passage on the valve core, and the flow passage area between the first flow passage and the second flow passage is gradually increased. According to the invention, the motion conversion assembly and the baffle assembly work together to convert the reciprocating motion of the rod piece into the linear displacement of the baffle, so that the pressure of the hydraulic circuit is changed to realize speed regulation, and the delay and accumulated error of the system are effectively reduced.

Inventors

BAI YUN
SUN QIANG
LUO XIAOBING
FU JIAXU
Ma Shaochang
Xia Hecheng

Assignees

燕山大学

Dates

Publication Date: 20260508
Application Date: 20260403

Claims (8)

1. A centrifugal stability-increasing self-response high-sensitivity hydraulic speed regulation system comprises a first hydraulic cylinder component, a motion conversion component, a first baffle component, a first single-nozzle baffle valve, a control valve component and an oil supply component, and is characterized in that, The first hydraulic cylinder assembly comprises a rod piece and a cylinder body, a first rod body of the rod piece is positioned in the cylinder body, and a first end of a second rod body is in sliding connection with a connecting end of the cylinder body; The motion conversion assembly comprises a first connecting piece and a second connecting piece, wherein the first end of the first connecting piece is connected with the second end of the second rod body, the second end of the first connecting piece is connected with the first end of the second connecting piece, and the second end of the second connecting piece is connected with the frame; The first baffle assembly comprises a baffle, a first rotating piece and a second rotating piece, wherein the first rotating part of the first rotating piece is connected with the third end of the second connecting piece, the third rotating part of the first rotating piece is connected with the fifth rotating part of the second rotating piece, and the sixth rotating part of the second rotating piece is connected with the baffle; The first single-nozzle baffle valve comprises a valve core and a valve body, wherein a first flow channel, a second flow channel, a third flow channel and a valve body flow channel are arranged on the valve body, the valve core is positioned in the valve body flow channel, a nozzle flow channel and a first valve core flow channel are arranged on the valve core, a first end of the first flow channel is connected with the oil supply assembly, a second end of the first flow channel is connected with the first end of the control valve assembly through the first valve core flow channel and the nozzle flow channel, and a second end and a third end of the control valve assembly are respectively connected with a first cavity and a second cavity in the cylinder body.
2. The centrifugal stability-increasing self-response high-sensitivity hydraulic speed regulating system according to claim 1, wherein the first rod body divides the cylinder body into a first cavity and a second cavity.
3. The centrifugal stability-increasing self-response high-sensitivity hydraulic speed regulating system according to claim 1, wherein the first rotating part is provided with a rotating gear, and the outer contour of the second connecting piece is a gear.
4. The centrifugal stability-increasing type self-response high-sensitivity hydraulic speed regulation system of claim 1, wherein the control valve assembly, the first reversing valve and the second reversing valve are three-position four-way reversing valves, and the oil supply assembly comprises a hydraulic pump and an oil tank, and the inlet end of the hydraulic pump is connected with the oil tank.
5. A self-response high-sensitivity hydraulic speed regulating method based on centrifugal stability enhancement is characterized in that when the rotating speed of a second rotating member is equal to a set rotating speed, a baffle is at a set position, a first flow channel on a valve body is communicated with a second flow channel, when the rotating speed of the second rotating member is higher than the set rotating speed, the baffle moves towards a nozzle flow channel on a valve core, the flow area between the first flow channel and the second flow channel is gradually reduced, and when the rotating speed of the second rotating member is lower than the set rotating speed, the baffle moves away from the nozzle flow channel on the valve core, and the flow area between the first flow channel and the second flow channel is gradually increased.
6. The centrifugal stability-increasing self-response high-sensitivity hydraulic speed regulating system comprises a second hydraulic cylinder component, a motion conversion component, a second baffle component, a second single-nozzle baffle valve, a control valve and an oil supply component, and is characterized in that, The second hydraulic cylinder assembly comprises a rod piece, a cylinder body and a compound rod, wherein a first rod body of the rod piece is positioned in the cylinder body, a first end of the second rod body is in sliding connection with a connecting end of the cylinder body, a third rod body of the compound rod is positioned in the second rod body, a fourth rod body of the compound rod is in sliding connection with a connecting end of the second rod body, the third rod body of the compound rod divides the inner part of the second rod body into a first subchamber and a second subchamber, a first compound flow channel and a second compound flow channel are arranged in the compound rod, the first compound flow channel is connected with the first subchamber through a second reversing valve, and the second compound flow channel is connected with the second subchamber through the first reversing valve; The second baffle assembly comprises a first baffle, a second baffle, a first rotating member and a second rotating member, wherein the outer part of a first rotating part of the first rotating member is connected with a third end of a second connecting member, a fixed end of the first rotating part of the first rotating member is connected with a fixed end of a third rotating part of the first rotating member through a second rotating part of the first rotating member, the third rotating part of the first rotating member is connected with a fifth rotating part of the second rotating member, a sixth rotating part of the second rotating member is connected with the first baffle, and the inner part of the first rotating member is rotationally connected with the second baffle; The second single-nozzle baffle valve comprises a valve core, a valve body, a nozzle and a valve sleeve, wherein a first flow passage, a second flow passage, a third flow passage and a valve body flow passage are arranged on the valve body, a first valve core flow passage, a second valve core flow passage and a third valve core flow passage are arranged on the valve core, a pressure relief hole is formed in the first valve core flow passage, the second valve core flow passage and the third valve core flow passage are positioned on two sides of the pressure relief hole, the valve core and the valve sleeve are positioned in the valve body flow passage, a first connecting end of the valve core penetrates through the first connecting end of the valve body and is connected with the nozzle, the valve core divides the inner part of the valve body flow passage into a first valve cavity and a second valve cavity, the second valve core flow passage is connected with the valve body flow passage through the first valve cavity, the third valve core flow passage is connected with the valve body flow passage through the second valve cavity, the nozzle flow passage is arranged on the nozzle, the second connecting end of the valve core is connected with the first connecting end of the valve sleeve, the second connecting end of the valve sleeve is connected with the second connecting end of the valve body through the first flow passage and the first flow passage, and the second end of the second connecting end of the valve sleeve is connected with the first reversing cavity and the first reversing cavity respectively.
7. The centrifugal stability-enhanced self-responsive high-sensitivity hydraulic speed regulation system of claim 6 wherein the axis of rotation between the first rotary member and the second rotary member and the axis of rotation between the first rotary member and the second rotary member are mutually perpendicular.
8. The centrifugal stability-enhanced self-response high-sensitivity hydraulic speed regulation system of claim 6, wherein the cross-sectional area of the nozzle flow passage is smaller than the cross-sectional area of the first flow passage, and the cross-sectional area of the pressure release hole is smaller than or equal to the cross-sectional area of the nozzle flow passage.

Description

Centrifugal stability-increasing self-response high-sensitivity hydraulic speed regulating system Technical Field The invention relates to the technical field of hydraulic systems, in particular to a centrifugal stability-increasing type self-response high-sensitivity hydraulic speed regulation system. Background The hydraulic speed regulating device plays a key role in mechanical equipment in the fields of industrial production lines, heavy lifting equipment, ship engines and the like by virtue of the characteristics of high precision and high reliability. The feedback adjustment of the current extruder hydraulic system mostly adopts a sensor to detect a motion signal, performs secondary calculation through a circuit, adjusts a control valve according to a calculation result, and further realizes speed control. However, the method has two remarkable limitations, namely, an inherent delay exists between signal acquisition and control valve action completion, the delay is easy to cause continuous oscillation of the system at a specific frequency, and the method becomes a key technical bottleneck long-standing in the field, and the two steps of sensor signal acquisition and control valve execution links have certain errors, accumulated errors are large, so that speed regulation precision is limited, and the method is another main problem which restricts system performance improvement. Therefore, how to effectively reduce the speed deviation in the control process in the feedback adjustment of the extruder speed, and improve the sensitivity of the system to the speed change and the control response speed is still a technical problem to be solved. Disclosure of Invention In order to solve the defects in the prior art, the invention aims to provide a centrifugal stability-increasing type self-response high-sensitivity hydraulic speed regulating system, wherein reciprocating motion of a hydraulic cylinder assembly is converted into rotary motion through a motion conversion assembly, the rotary motion is directly transmitted to a baffle plate of a baffle plate assembly, and the displacement of the baffle plate changes the gap between a nozzle and the baffle plate in a single-nozzle baffle plate valve, so that the flow passing area of a first flow passage and a second flow passage on a valve body in the single-nozzle baffle plate valve is changed, the output pressure and the flow rate of a control valve assembly are regulated instantaneously, the speed deviation of the control valve assembly is corrected, the whole process does not need to be interfered by an external electric control signal, the autonomous response is realized, the response sensitivity and the regulation precision to the speed disturbance are improved, and the delay and the accumulated error of the system are reduced. In particular, in one aspect, the invention provides a centrifugal stability augmentation type self-response high-sensitivity hydraulic speed regulation system which comprises a first hydraulic cylinder assembly, a motion conversion assembly, a first baffle assembly, a first single-nozzle baffle valve, a control valve assembly and an oil supply assembly. The first hydraulic cylinder assembly comprises a rod piece and a cylinder body, wherein a first rod body of the rod piece is positioned in the cylinder body, and a first end of a second rod body is in sliding connection with a connecting end of the cylinder body. The motion conversion assembly comprises a first connecting piece and a second connecting piece, wherein the first end of the first connecting piece is connected with the second end of the second rod body, the second end of the first connecting piece is connected with the first end of the second connecting piece, and the second end of the second connecting piece is connected with the frame. The first baffle assembly comprises a baffle, a first rotating piece and a second rotating piece, wherein the first rotating part of the first rotating piece is connected with the third end of the second connecting piece, the third rotating part of the first rotating piece is connected with the fifth rotating part of the second rotating piece, and the sixth rotating part of the second rotating piece is connected with the baffle. The first single-nozzle baffle valve comprises a valve core and a valve body, wherein a first flow channel, a second flow channel, a third flow channel and a valve body flow channel are arranged on the valve body, the valve core is positioned in the valve body flow channel, a nozzle flow channel and a first valve core flow channel are arranged on the valve core, a first end of the first flow channel is connected with the oil supply assembly, a second end of the first flow channel is connected with the first end of the control valve assembly through the first valve core flow channel and the nozzle flow channel, and a second end and a third end of the control valve assembly are respectively connected with a first c