CN210799852U - High-frequency response LVDT displacement sensor induction rod vibration prevention device of cartridge valve - Google Patents
High-frequency response LVDT displacement sensor induction rod vibration prevention device of cartridge valve Download PDFInfo
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- CN210799852U CN210799852U CN201921713292.8U CN201921713292U CN210799852U CN 210799852 U CN210799852 U CN 210799852U CN 201921713292 U CN201921713292 U CN 201921713292U CN 210799852 U CN210799852 U CN 210799852U
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Abstract
The utility model relates to a LVDT displacement sensor induction rod antivibration device of high frequency response cartridge valve, the damping mount pad is installed in the upper middle part of the high frequency response cartridge valve control cover plate, the damping mount pad hole is installed displacement sensor resistance to pressure pipe, connect the direction damping ring through elastic baffle and damping spring in the damping mount pad lower part hole, be equipped with balanced oilhole on the direction damping ring, the displacement sensor induction rod passes behind the hole of direction damping ring and is connected with displacement sensor resistance to pressure pipe hole clearance fit; when the valve core of the high-frequency-response cartridge valve moves at a high speed, the induction rod of the displacement sensor is in contact with the guide damping ring, and under the guide and damping effects of the guide damping ring and the damping spring, the radial vibration of the induction rod of the displacement sensor can be reduced, the interference on a valve position output signal can be reduced, the vibration contact abrasion between the induction rod and the inner wall of the pressure resistant pipe can be avoided, the position control precision and the dynamic response characteristic of the high-frequency-response cartridge valve can be effectively optimized, and the service life and the reliability of the high-frequency-response cartridge valve can be.
Description
Technical Field
The utility model relates to a LVDT displacement sensor response pole anti-vibration device for hydraulic valve especially relates to a LVDT displacement sensor response pole anti-vibration device of high frequency response cartridge valve.
Background
The inductive rod of the LVDT displacement sensor used by the common hydraulic valve is arranged on the valve core and is positioned inside the inductive coil of the displacement sensor and the pressure pipe, and the inductive rod in the valve has no motion guide anti-vibration device. When the hydraulic valve is used, due to the high-speed movement of the valve core, the fluid resistance generated in the pressure resisting pipe can cause the vibration of the induction rod, the stability of a displacement output signal of the valve core is influenced, and the closed-loop control time of the position of the valve core is prolonged or the positioning accuracy is deteriorated. Under special conditions, the induction rod can be in motion contact with the inner wall of the pressure pipe, abnormal abrasion and damage are generated, and the service life and the reliability index of the hydraulic valve are shortened.
Generally, the hydraulic valve with the spool valve provided with the LVDT displacement sensor has a short stroke and a relatively low running speed, the defects existing in the process are not easy to find early, and for a high-frequency-response cartridge valve suitable for high pressure and large flow, the high-frequency-response cartridge valve has obvious adverse effects due to large spool displacement stroke, high running speed, high acceleration, severe stroke terminal impact, great potential safety hazard, and the indexes such as dynamic response characteristics, service life and reliability of the high-frequency-response cartridge valve are reduced, so that the use requirements of a high-response and high-reliability hydraulic system cannot be met.
Disclosure of Invention
For solving problem and the defect that exists among the above-mentioned prior art, the utility model provides a LVDT displacement sensor response pole anti-vibration device of high frequency response cartridge valve, the device have characteristics such as stand wear and tear, compact, the antivibration effect is obvious, can avoid the displacement output signal that the response pole vibration caused unusual, prevent abnormal wear and tear and damage, improvement high frequency response cartridge valve control accuracy, security and reliability by a relatively large margin.
The technical scheme of the utility model as follows:
a vibration-proof device for an induction rod of a Linear Variable Differential Transformer (LVDT) displacement sensor of a high-frequency-response cartridge valve comprises a vibration-proof mounting seat, a guide vibration-proof ring, a vibration-proof spring and an elastic baffle, wherein the vibration-proof mounting seat is mounted at the middle upper part of a control cover plate of the high-frequency-response cartridge valve; when the valve core of the high-frequency-response cartridge valve moves at a high speed, the induction rod of the displacement sensor is in contact with the guide vibration attenuation ring, and under the guide and damping effects of the guide vibration attenuation ring and the vibration attenuation spring, the radial vibration of the induction rod of the displacement sensor can be reduced, the interference on a valve position output signal can be reduced, meanwhile, the vibration contact abrasion between the induction rod of the displacement sensor and the inner wall of a pressure pipe of the displacement sensor can be avoided, the position control precision and the dynamic response characteristic of the high-frequency-response cartridge valve can be effectively optimized, and the service life and the reliability of the high-.
Further, the vibration damping mounting seat is provided with a stepped shaft structure, an elastic clamping piece mounting ring groove, an O-shaped ring groove and a radial positioning shaft shoulder are arranged from top to bottom outside, and a displacement sensor induction rod mounting hole, a guide vibration damping ring mounting matching hole and an elastic baffle mounting ring groove are arranged from top to bottom inside.
Furthermore, the guide damping ring is made of wear-resistant self-lubricating copper alloy materials, 4 balance oil holes are uniformly distributed in the circumferential direction, and a damping spring guide stepped column base is arranged at the lower part of the guide damping ring.
Furthermore, the damping spring is sleeved on a damping spring guide stepped column platform of the guide damping ring, and the lower end of the damping spring is supported on the elastic baffle.
Furthermore, the elastic baffle is of an open plate type, and the upper part of the elastic baffle is a damping spring supporting plane; the elastic baffle is arranged in the inner hole mounting ring groove of the vibration reduction mounting seat.
The utility model discloses following beneficial effect has:
when the high-frequency response cartridge valve core moves at a high speed, the induction rod of the displacement sensor arranged on the valve core is contacted with the guide vibration damping ring, under the guide and damping effects of the vibration damping ring and the vibration damping spring, the radial vibration of the induction rod can be reduced, the interference on a valve position output signal is reduced, meanwhile, the vibration contact abrasion between the induction rod and the inner wall of the pressure resistant pipe is avoided, the position control precision and the dynamic response characteristic of the high-frequency response cartridge valve are effectively optimized, and the service life and the reliability of the high-frequency response cartridge valve are improved.
Drawings
FIG. 1 is a schematic structural diagram of an induction rod vibration-proof device of a high-frequency-response cartridge valve LVDT displacement sensor;
FIG. 2 is a schematic view of a partial structure of an induction rod vibration-proof device of the LVDT displacement sensor of the high-frequency-response cartridge valve;
in the figure: the hydraulic integrated valve comprises a hydraulic integrated valve block 1, a cartridge valve control cover plate 2, a cartridge valve sleeve 3, a cartridge valve core 4, a displacement sensor coil 5, a displacement sensor pressure pipe 6, a vibration damping mounting seat 7, a guide vibration damping ring 8, a vibration damping spring 9, a fixed elastic baffle 10, a displacement sensor induction rod 11, an induction rod mounting seat 12, a pressure pipe inner cavity 13, a middle accommodating cavity 14, a valve core upper end accommodating cavity 15, a valve core inner accommodating cavity 16, a valve core active control cavity I17, a valve core active control cavity II 18, a guide vibration damping ring mounting matching hole 19, a spring guide stepped column base 20, a spring supporting plane 21, a mounting ring groove 22, a balance oil hole 23, a guide vibration damping cylindrical surface 24 and an elastic baffle inner hole 25.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the utility model discloses a high frequency response valve's LVDT displacement sensor response pole anti-vibration device comprises damping mount pad 7, direction damping ring 8, damping spring 9 and fixed elastic baffle 10, and damping mount pad 7 is installed on the well upper portion of high frequency response valve control apron 2, and displacement sensor withstand voltage pipe 6 is installed to damping mount pad 7 hole, and the higher authority suit has parts such as displacement sensor coil 5. The displacement sensor induction rod 11 is arranged at the center of the top of the cartridge valve core 4.
The vibration reduction mounting seat 7 is of a stepped shaft structure, and an elastic clamping piece mounting ring groove, an O-shaped ring groove and a radial positioning shaft shoulder are arranged on the outer portion of the vibration reduction mounting seat from top to bottom; under the combined action of hydraulic oil pressure in the valve body, the positioning shaft shoulder of the mounting seat and the elastic clamping piece arranged on the cartridge valve control cover plate, the vibration reduction mounting seat 7 is reliably fixed on the cartridge valve control cover plate, and the design of the elastic structure can buffer external vibration and impact to a certain extent. The vibration damping mounting seat 7 is internally provided with a mounting hole of the displacement sensor induction rod 11, a guide vibration damping ring mounting matching hole 19 and a mounting ring groove 22 of the elastic baffle 10 from top to bottom. The pressure pipe 6 is arranged in the vibration reduction mounting seat 7 in an interference fit mode, and hydraulic oil leakage can be avoided when the valve body is in a high-pressure state.
The guide damping ring 8 is made of wear-resistant self-lubricating copper alloy material, 4 balance oil holes 23 are uniformly distributed in the circumferential direction, and a damping spring guide stepped column 20 is arranged at the lower part of the guide damping ring. The elastic baffle 10 is in an open plate type, and the upper part is a damping spring supporting plane 21.
The guide damping ring 8 is arranged in a guide damping ring mounting matching hole 19 in the damping mounting seat 7, the damping spring 9 is sleeved on a spring guide stepped column platform 20 of the guide damping ring, the damping spring 9 can adopt a wave-shaped disc spring or a cylindrical spring, and the other end of the damping spring is supported on a spring supporting plane 21 of the elastic baffle plate.
The elastic baffle 10 is installed in the inner hole installation ring groove 22 of the vibration reduction installation seat, and is made of an open structure and a spring steel material, and tools such as open tongs can be used for manual quick installation and removal.
The working principle of the utility model is as follows:
when the high-frequency response cartridge valve core 4 moves, the displacement sensor induction rod 11 is driven to move up and down at a high speed, and at the moment, hydraulic oil in the pressure-resistant pipe inner cavity 13 flows back and forth through a gap between the displacement sensor induction rod 11 and the displacement sensor pressure-resistant pipe 6, the balance oil hole 23 of the guide damping ring and the elastic baffle inner hole 25, so that the adverse effect caused by pressurization of the closed accommodating cavity is avoided.
When the high-frequency-response cartridge valve 4 moves at a high speed, the displacement sensor induction rod 11 installed on the valve core is in contact with the inner hole of the guide vibration damping ring 8, under the guide and damping effects of the guide vibration damping ring 8 and the vibration damping spring 9, the radial vibration of the induction rod 11 can be greatly reduced, the radial vibration interference on a valve position output signal is reduced, meanwhile, the vibration contact abrasion of the displacement sensor induction rod 11 and the inner wall of the pressure resistant pipe 6 of the displacement sensor is avoided, the guide vibration damping ring 8 made of a self-lubricating wear-resistant material can protect the induction rod 11 to reduce the guide abrasion to the maximum extent when the induction rod 11 is in motion contact, and the service life of the.
By the foregoing the technical scheme of the utility model and the detailed embodiment can see out, the utility model discloses a damping compact structure has moving part and holds intracavity oil pressure balance ability, has good displacement sensor response pole radial damping ability, except avoiding abnormal wear, has reduced the displacement signal distortion that the response pole vibration leads to, has effectively optimized high-frequency response cartridge valve position control accuracy and dynamic response characteristic, has improved high-frequency response cartridge valve's life and reliability.
Claims (5)
1. The utility model provides a LVDT displacement sensor induction rod anti-vibration device of high frequency response cartridge valve, comprises damping mount pad, direction damping ring, damping spring and elastic baffle, its characterized in that: the damping mounting seat is mounted on the middle upper part of the high-frequency-response cartridge valve control cover plate, a displacement sensor pressure-resistant pipe is mounted in an inner hole of the damping mounting seat, a guide damping ring is connected in the inner hole of the lower part of the damping mounting seat through an elastic baffle and a damping spring, a balance oil hole is formed in the guide damping ring, and a displacement sensor induction rod mounted in the center of the top of the valve core penetrates through an inner hole of the guide damping ring and then is in clearance fit connection with the inner hole of the displacement sensor pressure-resistant pipe; when the valve core of the high-frequency-response cartridge valve moves at a high speed, the induction rod of the displacement sensor is in contact with the guide vibration attenuation ring, and under the guide and damping effects of the guide vibration attenuation ring and the vibration attenuation spring, the radial vibration of the induction rod of the displacement sensor can be reduced, the interference on a valve position output signal can be reduced, meanwhile, the vibration contact abrasion between the induction rod of the displacement sensor and the inner wall of a pressure pipe of the displacement sensor can be avoided, the position control precision and the dynamic response characteristic of the high-frequency-response cartridge valve can be effectively optimized, and the service life and the reliability of the high-.
2. The LVDT displacement sensor induction rod anti-vibration device for the high frequency response cartridge valve according to claim 1, wherein: the vibration reduction mounting seat is provided with a stepped shaft structure, an elastic clamping piece mounting ring groove, an O-shaped ring groove and a radial positioning shaft shoulder are arranged from top to bottom outside, and a displacement sensor sensing rod mounting hole, a guide vibration reduction ring mounting matching hole and an elastic baffle mounting ring groove are arranged from top to bottom inside.
3. The LVDT displacement sensor induction rod anti-vibration device for the high frequency response cartridge valve according to claim 1, wherein: the guide damping ring is made of wear-resistant self-lubricating copper alloy materials, 4 balance oil holes are uniformly distributed in the circumferential direction, and a damping spring guide stepped column base is arranged on the lower portion of the guide damping ring.
4. The LVDT displacement sensor induction rod anti-vibration device for the high frequency response cartridge valve of claim 3, wherein: the damping spring is sleeved on the damping spring guide step pylon of the guide damping ring, and the lower end of the damping spring is supported on the elastic baffle.
5. The LVDT displacement sensor induction rod anti-vibration device for the high frequency response cartridge valve according to claim 1, wherein: the elastic baffle is in an open plate type, and the upper part of the elastic baffle is a damping spring supporting plane; the elastic baffle is arranged in the inner hole mounting ring groove of the vibration reduction mounting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921713292.8U CN210799852U (en) | 2019-10-10 | 2019-10-10 | High-frequency response LVDT displacement sensor induction rod vibration prevention device of cartridge valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921713292.8U CN210799852U (en) | 2019-10-10 | 2019-10-10 | High-frequency response LVDT displacement sensor induction rod vibration prevention device of cartridge valve |
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| CN210799852U true CN210799852U (en) | 2020-06-19 |
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| CN201921713292.8U Active CN210799852U (en) | 2019-10-10 | 2019-10-10 | High-frequency response LVDT displacement sensor induction rod vibration prevention device of cartridge valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117288078A (en) * | 2023-11-27 | 2023-12-26 | 天津德科智控股份有限公司 | Method for reducing lateral movement interference of displacement sensor and displacement sensor |
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2019
- 2019-10-10 CN CN201921713292.8U patent/CN210799852U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117288078A (en) * | 2023-11-27 | 2023-12-26 | 天津德科智控股份有限公司 | Method for reducing lateral movement interference of displacement sensor and displacement sensor |
| CN117288078B (en) * | 2023-11-27 | 2024-02-13 | 天津德科智控股份有限公司 | Method for reducing lateral movement interference of displacement sensor and displacement sensor |
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