CN210178819U - Oil supplementing device for hydraulic damper - Google Patents
Oil supplementing device for hydraulic damper Download PDFInfo
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- CN210178819U CN210178819U CN201920719169.0U CN201920719169U CN210178819U CN 210178819 U CN210178819 U CN 210178819U CN 201920719169 U CN201920719169 U CN 201920719169U CN 210178819 U CN210178819 U CN 210178819U
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- safety valve
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- thermal safety
- hydraulic damper
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Abstract
The utility model discloses a hydraulic damper mends oily device aims at providing one kind and can not send out the device of leaking because of the influence of environmental factor such as temperature, vibration, impact. The utility model discloses it realizes to say technical scheme under the lower: a thermal safety valve which is vertical to the axis in the radial direction and is communicated with the oil cavity is arranged on the outer side of the blind hole end of the oil cavity cylinder body, a thermal safety valve spring is arranged in the thermal safety valve, and a sealing element is vulcanized on the framework to realize rubber soft sealing; two II-type combined seals are arranged on the sealing surface of the compensation piston and the oil supplementing box, and a damping spring is sleeved through a built-in bearing of an end cover to provide required compensation pressure for the oil cavity cylinder body to reciprocate to the hydraulic damper; the thermal safety valve is in a closed state under a normal state, when an abnormal accident occurs, oil from the inner cavity of the damper expands rapidly, the internal pressure rises to overcome the prestress of a spring of the thermal safety valve to compress the thermal safety valve, the thermal safety valve is separated from a sealing surface of a mounting hole of the thermal safety valve at the outer side of the blind hole end of the oil cavity cylinder body to release pressure, and parts are effectively protected from being damaged.
Description
Technical Field
The utility model relates to a mainly be applied to the sealed compensator device of long-life among the aviation hydraulic damper, especially the hydraulic damper's of long-life work oil supplementing device under environment such as high, low temperature, vibration, the example that can use includes trades such as aviation, space flight, car, building, road bridge railway, among the mechanical engineering, ground motion vehicle, aircraft operating system etc..
Background
The hydraulic damper is a hydraulic cylinder filled with hydraulic oil, and pressure difference is generated between two cavities of the hydraulic cylinder through a damping control valve and a damping orifice, so that damping force is generated on a load. When the helicopter hydraulic damper is installed and used, the hydraulic damper is always required to be provided with the constant pressure valve, and when the axial speed of the hydraulic damper is overlarge, the constant pressure valve is automatically opened, so that the load of the hydraulic damper cannot be in a large rising flight state, and the peak value is maximum. When the helicopter flies constantly, the blades are in periodic flap vibration and variable pitch movement, and the movement acts on the hydraulic damper through geometric coupling, so that the axial speed of the hydraulic damper is also in periodic variation. If the axial velocity amplitude of the hydraulic damper exceeds the velocity of the constant pressure valve when the constant pressure valve is opened, the constant pressure valve of the hydraulic damper is always in an alternative opening and closing state, so that the service life of the constant pressure valve (the hydraulic damper) can be reduced on one hand, and the effective damping of the hydraulic damper can be reduced on the other hand. When the helicopter hydraulic damper is installed and used, oil leakage occurs in the compensator device in a low-temperature environment, the compensator device is a device for providing oil compensation for hydraulic products with a buffering function, such as a hydraulic damper, a buffer, a shimmy damper and the like, and is mainly suitable for independent hydraulic buffering functional products. The working principle is that the thermal safety valve is in a closed state under a normal state, when abnormal accidents such as fire disasters occur, the internal pressure of oil is rapidly expanded and raised, when the hydraulic pressure is higher than the valve core closing force provided by a thermal safety valve spring, the thermal safety valve core compression spring moves under the action of hydraulic pressure, a valve core vulcanized rubber piece is separated from a sealing surface of the thermal safety valve of the oil supplementing box, and liquid flows through a sealing piece and flows to the outside of a product through an oil discharge small hole of the oil supplementing box, so that the pressure relief function is realized, and the related parts of a hydraulic accessory are protected. Due to the influence of the gap of the oil supplementing distribution valve, the effective damping of the damper at low speed is greatly reduced; in a stable rotating speed area of a model rotor without a damper, the damper cannot improve the dynamic stability of the system under the condition of small disturbance; in the model rotor instability zone without damper, the system will have a limit cycle and the limit cycle amplitude increases with increasing clearance of the oil distribution valve. When a hydraulic damper product normally works, the volume of oil is changed due to oil pulsation and temperature change, so that when the hydraulic damper product works or is parked, the compensating piston can frequently generate a small stroke movement trend, the sealing structure at the position of the compensator device is difficult to ensure the required sealing performance under the comprehensive environmental conditions of high temperature, low temperature, vibration, impact and the like, and meanwhile, the sealing element is easy to damage.
The core components in the sealing compensator device are a thermal safety valve and a combined sealing element, and because the opening force required by the thermal safety valve core is small, the sealing effect provided by a thermal safety valve spring is small, and the spring force is influenced to fluctuate under the action of vibration and impact force, so that the sealing performance is unstable.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists oil leak, sealing member life-span weak point among the current attenuator compensator technique, the utility model discloses a task is long-life sealed compensator device, provides the long-life sealed compensator device that has explosion-proof, anti-vibration, impact resistance environment to solve the long-life sealed technique under the required service environment, solve the problem that sealing performance can not satisfy service environment, improve the leakproofness in the life-span of wide band broad width differential type hydraulic damper. Aims to provide a compensator device which is high temperature resistant, low temperature resistant, vibration resistant and long-life sealed,
the utility model provides a technical scheme that its technical problem adopted is: an oil replenishing device for a hydraulic damper, comprising: the damping that communicates hydraulic damper on hydro-cylinder and the hydro-cylinder that can fix on the hydraulic damper cylinder body connects the mouth to and assemble compensation piston 1 in oil pocket cylinder body 4, its characterized in that: a thermal safety valve 8 which is vertical to the axis in the radial direction and is communicated with the oil cavity is arranged on the outer side of the blind hole end of the oil cavity cylinder body 4, a thermal safety valve spring 9 is arranged in the thermal safety valve 8, and a sealing element is vulcanized on the framework to realize rubber soft sealing; two 'II-type combined seals' are arranged on the sealing surface of the compensation piston 1 and the oil supplementing box, a damping spring 5 is sleeved on a built-in bearing 2 through an end cover 3, and the oil cavity cylinder body 4 reciprocates to provide required compensation pressure for the hydraulic damper; the thermal safety valve 8 is matched with the end face of a safety valve hole of the oil cavity cylinder body 4 under the action of the thermal safety valve spring 9 to form a sealing surface, leakage is prevented when the damper is normally used, the opening pressure of the thermal safety valve is adjusted by adjusting the thickness of an adjusting gasket 7 assembled on the thermal safety valve spring 9 and controlling the pre-pressure of the thermal safety valve spring 9, the thermal safety valve 9 is in a closed state under a normal state, when abnormal accidents such as fire disasters occur, oil from the inner cavity of the damper expands rapidly, the internal pressure rises to overcome the pre-stress of the thermal safety valve spring 9 to compress the oil, the thermal safety valve 8 is separated from the sealing surface of a safety valve mounting hole at the outer side of the blind hole end of the oil cavity cylinder body 4 to.
The utility model discloses compare and have following beneficial effect in prior art:
the utility model discloses for preventing that the unstable phenomenon of leakproofness from appearing in the hot safety valve core, change traditional hot safety valve sealing form into rubber soft seal by hard formula steel ball or conical surface sealing to its ingenious composite set is at the root of oil pocket cylinder body 4. Two 'II-type combined seals' are arranged on the sealing surface of the compensation piston and the oil supplement box, so that the sealing property and the durability of the part are effectively improved, and the phenomenon that leakage occurs in the service life cycle of the damper is guaranteed. The design concept of the thermal safety valve and the two 'II-type combined sealing' structures is novel, so that the damper is guaranteed to play an effective oil supplementing role under the conditions of high frequency and wide width, and meanwhile, an explosion-proof role is played under the abnormal emergency. The thermal safety valve 8 vulcanizes a sealing piece on the framework, the sealing mode of the traditional thermal safety valve is changed from hard steel ball or conical surface sealing into rubber soft sealing, the inner end surface is matched with the end surface of a safety valve hole of the oil cavity cylinder body 4 under the action of a thermal safety valve spring 9 to form a sealing surface, leakage is prevented when the damper is normally used, the opening pressure of the thermal safety valve is adjusted through an adjusting gasket 7, the thermal safety valve is in a closed state under a normal state, when abnormal accidents such as fire disasters occur, oil expands sharply, the internal pressure rises, the internal pressure overcomes the prestress of the thermal safety valve spring 9 to compress the thermal safety valve, the thermal safety valve 8 is separated from the sealing surface of the oil cavity cylinder body 4 to release pressure, and parts. The load of the hydraulic damper and the load of the propeller hub are reduced, and the effective damping of the hydraulic damper is improved.
The utility model discloses a seal structure form of twice "II type composite seal", seal 13 cooperation among the compensating piston 1 forms good sealed face, guarantees to send out the leakage because of the influence of environmental factor such as temperature, vibration, impact in attenuator life cycle.
The utility model discloses during sealed compensator device was applied to aviation hydraulic damper, guaranteeing to provide required function demand prerequisite under, small, the quality is light, and longe-lived, leakproofness are good. The device is placed in a water tank,
drawings
Fig. 1 is a schematic structural view of the sealing compensation device of the hydraulic damper of the present invention.
Fig. 2 is a schematic view of a compensated piston assembly.
Fig. 3 is a schematic view of the installation of the compensator apparatus on the damper.
Fig. 4 is a view of an advanced seal ring structure.
In the figure: the device comprises a compensation piston 1, a compensation spring adjusting cylinder 2, an end cover 3, an oil cavity cylinder body 4, a damping spring 5, a plug 6, an adjusting gasket 7, a thermal safety valve 8, a thermal safety valve spring 9, a damping connecting nozzle 10, a compensation piston rod 11, an oil injection valve cavity 12, a sealing body 13, an oil injection valve spring 14, a spring seat 15 and a piston head 16.
The present invention is further described with reference to the following figures and examples, but the invention is not limited thereby within the scope of the described embodiments. All of these concepts should be considered as within the scope of the present disclosure and the present invention.
Detailed Description
See fig. 1-3. In an embodiment described below, a hydraulic damper oil replenishment device includes: an oil cylinder which can be fixed on the cylinder body of the hydraulic damper, a damping connecting nozzle which is communicated with the hydraulic damper on the oil cylinder, and a compensating piston 1 which is assembled in the oil chamber cylinder body 4. A thermal safety valve 8 which is vertical to the axis in the radial direction and is communicated with the oil cavity is arranged on the outer side of the blind hole end of the oil cavity cylinder body 4, a thermal safety valve spring 9 is arranged in the thermal safety valve 8, and a sealing element is vulcanized on the framework to realize rubber soft sealing; two 'II-type combined seals' are arranged on the sealing surface of the compensation piston 1 and the oil supplementing box, a damping spring 5 is sleeved on a built-in bearing 2 through an end cover 3, and the oil cavity cylinder body 4 reciprocates to provide required compensation pressure for the hydraulic damper; the thermal safety valve 8 is matched with the end face of a safety valve hole of the oil cavity cylinder body 4 under the action of the thermal safety valve spring 9 to form a sealing surface, leakage is prevented when the damper is normally used, the opening pressure of the thermal safety valve is adjusted by adjusting the thickness of an adjusting gasket 7 assembled on the thermal safety valve spring 9 and controlling the pre-pressure of the thermal safety valve spring 9, the thermal safety valve 9 is in a closed state under a normal state, when abnormal accidents such as fire disasters occur, oil from the inner cavity of the damper expands rapidly, the internal pressure rises to overcome the pre-stress of the thermal safety valve spring 9 to compress the oil, the thermal safety valve 8 is separated from the sealing surface of a safety valve mounting hole at the outer side of the blind hole end of the oil cavity cylinder body 4 to.
The oil cavity cylinder body 4 is provided with a sealing ring groove for installing a sealing ring and sealing ring combination and a sealing assembly of the sealing ring and the sealing ring combination, so that the sealing ring groove and the sealing body 13 in the compensation piston 1 are matched to form two 'II-type combined seals', and the phenomenon that leakage occurs in the service life cycle of the damper is guaranteed. The oil cavity cylinder body 4 is provided with a mounting hole of a thermal safety valve 8 and a sealing ring groove for assembling a II-type combined sealing mechanism. The sealing ring and the sealing ring combination and the sealing ring combination form two 'II type combined seals' which are arranged in a prefabricated sealing groove of the oil cavity cylinder body 4 so as to ensure the long-life seal of the compensator.
The thermal safety valve 8 adopts a vulcanization mode, a rubber soft sealing element is fixed on the thermal safety valve, the sealing mode of the traditional thermal safety valve 8 is changed from hard steel ball or conical surface sealing into rubber soft sealing, and the rubber soft sealing is arranged at the root of a safety valve spring 9.
The vulcanized rubber on the thermal safety valve 8 is tightly attached to the end face of the thermal safety valve mounting hole of the oil cavity cylinder body 4 under the action of the thermal safety valve spring 9, so that good sealing performance of the thermal safety valve is ensured.
The safety valve spring 9 adjusts the elastic force by increasing or decreasing the adjusting gasket 7, and plays a role in adjusting the hydraulic pressure value of the thermal safety valve to be opened. The compensation piston 1 is limited and arranged in the oil cavity cylinder body 4 through the elastic force of the damping spring 5, and required compensation pressure is provided for the normal work of the compensator.
See fig. 2. The compensating piston 1 comprises a piston head 16 which is provided with a connecting compensating piston rod 11, the piston head 16 is provided with a hollow cavity for accommodating a spring, and the fixed end of the compensating piston rod 11 is hermetically fixed in a sealing body 13 of the piston head 16. The compensating piston rod 11 is a rod body provided with a hollow channel, the fixed end of the rod body is provided with an oil filling valve cavity 12 and an oil filling valve spring 14 which is assembled in the oil filling valve cavity 12 and fixed through a spring seat 15, and when the damper is in an oil shortage state due to use loss, oil leakage and the like in daily work, pressure action is generated through the pretightening force of the damping spring 5 to force oil in the oil supplementing device to flow to the damping cavity of the damper to provide oil required for normal work; when the oil stored in the oil supplementing device is insufficient and cannot meet the oil supplementing requirement, an oil filling nozzle is connected to an oil supplementing port of the compensation piston 1, an oil filling valve cavity 12 is opened under the pressure action of an external hydraulic source, the oil is supplemented to the compensation device, and the oil can be effectively supplemented when the product is in an oil shortage state; when the oil is excessive during oil supplement, a special oil discharge tool is adopted to overcome the pretightening force of the oil injection valve spring 14 to jack the oil injection valve cavity 12, and the oil reversely flows out.
The thermal safety valve 8 vulcanizes a sealing piece on the framework, the sealing mode of the traditional thermal safety valve is changed from hard steel ball or conical surface sealing into rubber soft sealing, the inner end surface is matched with the end surface of a safety valve hole of the oil cavity cylinder body 4 under the action of a thermal safety valve spring 9 to form a sealing surface, leakage is prevented when the damper is normally used, the opening pressure of the thermal safety valve is adjusted through an adjusting gasket 7, the thermal safety valve is in a closed state under a normal state, when abnormal accidents such as fire disasters occur, oil expands sharply, the internal pressure rises, the internal pressure overcomes the prestress of the thermal safety valve spring 9 to compress the thermal safety valve, the thermal safety valve 8 is separated from the sealing surface of the oil cavity cylinder body 4 to release pressure, and parts.
Claims (9)
1. An oil replenishing device for a hydraulic damper, comprising: the damping that communicates hydraulic damper on hydro-cylinder and the hydro-cylinder that can fix on the hydraulic damper cylinder body connects the mouth to and assemble compensating piston (1) in oil pocket cylinder body (4), its characterized in that: a thermal safety valve (8) which is vertical to the axis in the radial direction and is communicated with the oil cavity is arranged on the outer side of the blind hole end of the oil cavity cylinder body (4), a thermal safety valve spring (9) is arranged in the thermal safety valve (8), and a sealing element is vulcanized on the framework to realize rubber soft sealing; two 'II-type combined seals' are arranged on sealing surfaces of the compensation piston (1) and the oil supplementing box, a damping spring (5) is sleeved on an adjusting cylinder (2) of the compensation spring arranged in the end cover (3), and the oil cavity cylinder body (4) reciprocates to provide required compensation pressure for the hydraulic damper.
2. The hydraulic damper oil replenishment device according to claim 1, characterized in that: the oil cavity cylinder body (4) is provided with a mounting hole of a thermal safety valve (8) and a sealing ring groove for assembling a II-type combined sealing mechanism.
3. The hydraulic damper oil replenishment device according to claim 2, characterized in that: two 'II-type combined seals' are arranged in a sealing groove prefabricated in the oil cavity cylinder body (4).
4. The hydraulic damper oil replenishment device according to claim 1, characterized in that: the rubber soft seal is arranged at the root of the safety valve spring (9).
5. The hydraulic damper oil replenishment device according to claim 1, characterized in that: vulcanized rubber on the thermal safety valve (8) is tightly attached to the end face of a thermal safety valve mounting hole of the oil cavity cylinder body (4); the thermal safety valve (8) is matched with the safety valve hole end face of the oil cavity cylinder body (4) to form a sealing surface under the action of the thermal safety valve spring (9), leakage is prevented when the damper is normally used, and opening pressure of the thermal safety valve is adjusted by controlling the pre-pressure of the thermal safety valve spring (9) through adjusting the thickness of an adjusting gasket (7) assembled on the thermal safety valve spring (9).
6. The hydraulic damper oil replenishment device according to claim 1, characterized in that: the safety valve spring (9) adjusts the elastic force by increasing or decreasing the adjusting gasket (7) to adjust the hydraulic pressure value for opening the thermal safety valve (8).
7. The hydraulic damper oil replenishment device according to claim 1, characterized in that: the compensation piston (1) is limited and arranged in the oil cavity cylinder body (4) through the elastic force of the damping spring (5), and required compensation pressure is provided for the normal work of the compensator.
8. The hydraulic damper oil replenishment device according to claim 1, characterized in that: the compensating piston (1) comprises a piston head (16) connected with a compensating piston rod (11), the piston head (16) is provided with a hollow cavity for accommodating a spring, and the fixed end of the compensating piston rod (11) is hermetically fixed in a sealing body (13) of the piston head (16).
9. The hydraulic damper oil replenishment device according to claim 1, characterized in that: the compensating piston rod (11) is a rod body provided with a hollow channel, and the fixed end of the rod body is provided with an oil filling valve cavity (12) and an oil filling valve spring (14) which is assembled in the oil filling valve cavity (12) and fixed through a spring seat (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920719169.0U CN210178819U (en) | 2019-05-17 | 2019-05-17 | Oil supplementing device for hydraulic damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920719169.0U CN210178819U (en) | 2019-05-17 | 2019-05-17 | Oil supplementing device for hydraulic damper |
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| CN210178819U true CN210178819U (en) | 2020-03-24 |
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| CN201920719169.0U Active CN210178819U (en) | 2019-05-17 | 2019-05-17 | Oil supplementing device for hydraulic damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159699A (en) * | 2019-05-17 | 2019-08-23 | 四川凌峰航空液压机械有限公司 | The recharging oil device of pressure compensation hydraulic damper |
-
2019
- 2019-05-17 CN CN201920719169.0U patent/CN210178819U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159699A (en) * | 2019-05-17 | 2019-08-23 | 四川凌峰航空液压机械有限公司 | The recharging oil device of pressure compensation hydraulic damper |
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