CN217124605U - Liquid-sealed air pressure type tension compensation device - Google Patents
Liquid-sealed air pressure type tension compensation device Download PDFInfo
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- CN217124605U CN217124605U CN202122819316.1U CN202122819316U CN217124605U CN 217124605 U CN217124605 U CN 217124605U CN 202122819316 U CN202122819316 U CN 202122819316U CN 217124605 U CN217124605 U CN 217124605U
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Abstract
The utility model discloses a liquid seal's vapour-pressure type tension compensation arrangement, include by an energy storage section of thick bamboo, the hydraulic cylinder of nonoculture, control the cylinder that the end cover welding formed and close the piece, be provided with the piston in the hydraulic cylinder, the piston rod, well isolation seat and right-hand member lid, separate an energy storage section of thick bamboo through the centre, the inside of hydraulic cylinder is separated and is come, right side and right-hand member lid at well isolation seat, form independent hydraulic seal protection zone between the energy storage section of thick bamboo inner wall, form the workspace between the left side of well isolation seat and the piston, form the energy storage district between the inner wall of an energy storage section of thick bamboo and the outer wall of hydraulic cylinder, it is as sealing medium to fill into high-pressure liquid in the hydraulic seal protection zone, at the workspace, fill into high-pressure gas in the energy storage district as working medium and energy storage medium. An independent hydraulic sealing protection area is designed, high-pressure liquid is used as a special sealing medium, the conventional practice that the high-pressure liquid plays a double-layer role of working medium and sealing medium in the past is broken through, and zero leakage can be realized.
Description
Technical Field
The utility model relates to an electrified railway power supply technical field especially relates to electrified traffic track contact net contact wire and carrier cable tension automatic compensation arrangement.
Background
At present, the automatic compensation of the tension of the electrified traffic track contact network cable along with the change of the environmental temperature is mainly completed by utilizing a pendant, the method is inconvenient to install and maintain due to heavy weight and is not attractive, particularly, the pendant is installed in a tunnel, the section of the tunnel needs to be enlarged and excavated, the workload and the engineering cost are greatly increased, the construction period is prolonged, and the method is even difficult to realize on sections and bridges with complicated geological conditions. The other is a spring compensation device, foreign brands are used in a small amount, the device overcomes the defect of large volume, but the defects of insufficient compensation precision and stability are exposed, and meanwhile, the device is heavy in weight and high in cost.
The third is the patented pneumatic and pneumatic, or hydropneumatic or hydraulic, type of tension compensation devices, which are broadly classified into the following types:
the pneumatic tension compensation device has the advantages that the pneumatic tension compensation device is light, low in cost and convenient to install, the energy storage medium and the working medium are all gas, but the pneumatic tension compensation device has the biggest problem that sealing is not enough, particularly, when the ambient temperature is low, a piston rod (a telescopic rod) extends out for a long time, the pneumatic tension compensation device is horizontally suspended, and the piston rod is forced to leak gas under the action of vertical external force, wind power, gravity and the like;
2, the gas-liquid pressure compensation device is also commonly used in the devices that when the environmental temperature is low, a piston rod (telescopic rod) extends out of the compensation device to be too long to be horizontally suspended, and under the action of vertical external force wind power, gravity and the like, particularly wind vibration caused by wind power pulsation effect is suspended out of the external piston rod to be too long and guide difference to generate intermittent distortion and hold-back force to damage a sealing ring to be attached to a sliding surface, so that leakage occurs.
Pneumatic and gas-liquid tension compensation devices have the defects, so that the compensation devices of the type are not normally applied.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the weak point that above-mentioned compensation arrangement exists, and provide a liquid seal's vapour-pressure type tension compensation arrangement, designed independent hydraulic seal protection zone, high-pressure liquid has broken through the convention that plays working medium and sealing medium double-deck effect in the past as special sealing medium, can choose the great hydraulic oil of viscosity for use as sealing medium like this, can realize zero leakage, overcomes the low temperature load leakage problem of current compensation arrangement ubiquitous.
The technical scheme of the utility model is specifically as follows:
a liquid-sealed pneumatic tension compensator comprises a cylinder assembly formed by welding an energy storage cylinder, a single-acting hydraulic cylinder and left and right end covers, the hydraulic cylinder barrel is inserted and welded in the energy storage barrel and coaxially arranged with the energy storage barrel, a piston rod, a middle isolation seat and a right end cover are arranged in the hydraulic cylinder barrel, the energy storage barrel and the hydraulic cylinder barrel are separated from each other through the middle isolation seat, an independent hydraulic sealing protection area is formed between the right side of the middle isolation seat and the right end cover and between the right side of the middle isolation seat and the inner wall of the energy storage cylinder, a working area is formed between the left side of the middle isolation seat and the piston, an energy storage area positioned on the left side of the middle isolation seat is formed between the inner wall of the energy storage cylinder and the outer wall of the hydraulic cylinder barrel, and a fixed amount of liquid is filled in the hydraulic sealing protection area to serve as a sealing medium, and high-pressure gas (the pressure is greater than the gas pressure in the working area) is filled in the hydraulic sealing protection area to play a role in pressurization. The energy storage area is communicated with the working area through a small hole e on the side wall of the hydraulic cylinder barrel, and high-pressure gas serving as a working medium and an energy storage medium is filled into the working area and the energy storage area.
Furthermore, two first tyre-shaped sealing rings are arranged on the middle isolation seat, and the left first tyre-shaped sealing ring and the right first tyre-shaped sealing ring are respectively communicated with the working area and the hydraulic sealing protection area through small holes a on the left side and the right side of the middle isolation seat so as to introduce high-pressure gas and high-pressure liquid to achieve internal static sealing.
Furthermore, an inflation valve for inflating the energy storage cylinder is arranged on the left end cover of the energy storage cylinder, and a liquid charging air valve for charging liquid and inflating the hydraulic sealing protection area is arranged on the right end cover.
Furthermore, the hydraulic sealing protection area is filled with quantitative liquid inside and outside the hydraulic cylinder barrel, and high-pressure gas is filled above the liquid.
Further, an I-shaped sealing ring is respectively arranged between the upper end cover and the right end cover of the middle isolation seat and the piston rod, a fixed pressing ring with a small hole is sleeved in the I-shaped sealing ring, the I-shaped sealing ring is fixed and pressed through a pressing nut, and high-pressure liquid is respectively led into the I-shaped sealing ring through a small hole a on the right side of the isolation seat and a small hole b on the right end cover; a polytetrafluoroethylene sleeve is pressed and adhered to the piston rod, so that friction is reduced.
Furthermore, a second tire-shaped sealing ring is arranged on the piston, a small hole c communicated with the second tire-shaped sealing ring is formed in the right side of the piston, and high-pressure gas is filled into the second tire-shaped sealing ring through the small hole c.
Furthermore, a functional sleeve with a certain length is arranged between the middle isolation seat and the right end cover to form a sealing protection area.
Further, the right end cover is fixed on the cylinder barrel assembly through a bolt, and forms static seal with the inner diameter of the hydraulic cylinder barrel through an O-shaped sealing ring.
Further, an atmosphere zone area positioned on the left side of the piston is formed on the leftmost side of the hydraulic cylinder barrel, the atmosphere zone area is communicated with the atmosphere through a bent pipe, and a brake screw plug is mounted at the end of the bent pipe.
Furthermore, a tire-shaped brake sealing ring is arranged on the left side of the piston, and a small through hole d communicated with the atmosphere zone is formed in the brake sealing ring.
Furthermore, the piston rod is sleeved and bonded with a 3 mm-thick polytetrafluoroethylene sleeve in a press fit manner.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the whole sealing system of the utility model consists of a tyre-shaped piston sealing ring, an I-shaped piston rod sealing ring, and a sealing medium of high-pressure gas and liquid which are led into a sealing ring cavity through small holes on the right end covers of the piston and the cylinder barrel; the sealing mechanism is that high-pressure gas and high-pressure liquid are used as sealing media and are respectively led into the inner cavities of the tire-shaped sealing ring and the I-shaped sealing ring, so that the sealing rings tightly press the moving contact surface to effectively seal.
(2) The utility model discloses well compensation arrangement overall structure forms 4 functional areas: a D zone (communicated with the atmosphere), a G zone (a piston motion working zone in the cylinder), a C zone (an energy storage zone) and a Y zone (a hydraulic seal protection zone); the hydraulic seal protection area is added on the functional area, and the area has two characteristics: firstly, liquid is used as a special sealing medium in design, and the conventional practice that the liquid plays a double-layer role of a working medium and the sealing medium in the past is broken through, so that hydraulic oil with high viscosity can be selected as the sealing medium, and zero leakage can be realized; and secondly, due to the design of the area, when the compensating device is used, particularly when the piston rod extends out greatly under the condition of low temperature, the normal sealing of a sealing system cannot be damaged due to intermittent deformation and stiffness of the piston rod caused by wind vibration action caused by natural external force, particularly wind power pulsation.
(3) The rod part of the piston rod is sleeved and pressed and is bonded with a polytetrafluoroethylene sleeve with the wall thickness of 3mm, so that the friction force of a sealing contact surface is reduced, and the compensating device is more sensitive and effective.
Drawings
Fig. 1 is a schematic structural view of the pneumatic tension compensator of the present invention.
In the figure, an energy storage cylinder 1, a hydraulic cylinder barrel 2, a second tire-shaped sealing ring 3, a piston 4, an intermediate isolation seat 5, a first tire-shaped sealing ring 6, an I-shaped sealing ring 7, a fixed compression ring 8, a compression nut 9, a functional sleeve 10, a piston rod 11, a left end cover 12, a right end cover 13, a liquid charging valve 14, an inflation valve 15, a brake sealing ring 16, a brake screw plug 17 and an O-shaped sealing ring 18 are arranged; the device comprises an atmospheric layer region D, a working region G, an energy storage region C and a hydraulic seal protection region Y.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings and the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1, a liquid-sealed pneumatic tension compensation device comprises a cylinder assembly formed by welding an energy storage cylinder 1, a single-acting hydraulic cylinder 2, and left and right end covers, wherein the hydraulic cylinder 2 is inserted and welded inside the energy storage cylinder 1, and the two are coaxially arranged, a piston 4, a piston rod 11, a middle isolation seat 5 and a right end cover 13 are arranged in the hydraulic cylinder 2, the interiors of the energy storage cylinder 1 and the hydraulic cylinder 2 are isolated by the middle isolation seat 5, an independent hydraulic sealing protection area Y is formed between the right side of the middle isolation seat 5 and the right end cover 13 as well as the inner wall of the energy storage cylinder 1, a working area G is formed between the left side of the middle isolation seat 5 and the piston 4, an energy storage area C positioned on the left side of the middle isolation seat 5 is formed between the inner wall of the energy storage cylinder 1 and the outer wall of the hydraulic cylinder 2, and a liquid is filled in the hydraulic sealing protection area Y as a sealing medium, then high-pressure gas is injected to play a role in pressurization, the energy storage area C is communicated with the working area G through a small hole e on the side wall of the hydraulic cylinder barrel 2, and the working area G and the energy storage area C are filled with the high-pressure gas as a working medium and an energy storage medium.
As shown in fig. 1, in the present embodiment:
two first tyre-shaped sealing rings 6 are arranged on the middle isolation seat 5, and the left and right first tyre-shaped sealing rings 6 are respectively communicated with the working area and the hydraulic sealing protection area through small holes a on the left and right sides of the middle isolation seat 5 so as to introduce high-pressure gas and high-pressure liquid to achieve internal sealing.
In this embodiment: high-pressure gas and liquid are respectively led in through the left and right small holes a on the middle isolation seat 5, so that internal sealing is realized, oil and gas are ensured not to be communicated, and the sealing effect is improved.
As shown in fig. 1, in the present embodiment:
an inflation valve 15 for inflating the energy storage cylinder is arranged on the left end cover of the energy storage cylinder 1, and a liquid charging air valve 14 for charging liquid or inflating the hydraulic sealing protection area is arranged on the right end cover 13.
High-pressure liquid is filled in the hydraulic cylinder barrel 2 and the periphery of the hydraulic cylinder barrel in the hydraulic seal protection area, and high-pressure gas is filled above the high-pressure liquid.
High-pressure liquid is used as a sealing medium and is respectively led into the inner cavities of the tire-shaped sealing ring and the I-shaped sealing ring in the hydraulic sealing protection area, so that the sealing rings tightly press the moving contact surface to effectively seal.
As shown in fig. 1, in the present embodiment:
an I-shaped sealing ring 7 is respectively arranged between the upper end cover 13 and the right end cover 13 of the middle isolation seat 5 and the piston rod 11, a fixed pressing ring 8 with a small hole is sleeved in the I-shaped sealing ring 7, the I-shaped sealing ring 7 is fixed and pressed through a pressing nut 9, and high-pressure liquid is respectively led into the left and right I-shaped sealing rings 7 through a small hole a at the right side of the middle isolation seat 5 and a small hole b on the right end cover 13; a polytetrafluoroethylene sleeve is pressed and adhered on the piston rod 11, so that friction is reduced.
The high-pressure liquid entering the two I-shaped sealing rings 7 respectively through the I-shaped sealing rings 7 and the small holes a on the middle isolation seat 5 and the small holes b on the right end cover 13 forms a piston rod dynamic sealing device.
As shown in fig. 1, in the present embodiment:
the piston 4 is provided with a second tire-shaped sealing ring 3, a small hole c communicated with the second tire-shaped sealing ring 3 is formed in the right side of the piston 4, and high-pressure gas is filled into the second tire-shaped sealing ring 3 through the small hole c.
The second tire-shaped sealing ring 3 on the right side of the piston 4 enters high-pressure gas through the small hole c at the piston end to form a piston dynamic sealing device.
As shown in fig. 1, in the present embodiment:
a functional sleeve 10 of a certain length is provided between the intermediate isolation seat 5 and the right end cap 13 to form a sealed protection area.
As shown in fig. 1, in the present embodiment:
the right end cap 13 is fixed to the cylinder assembly by bolts and forms a static seal with the inner diameter of the hydraulic cylinder 2 by an O-ring 18.
The middle seat 5 forms static seal with the inner diameter of the hydraulic cylinder barrel 1 through a left first tire type seal ring and a right first tire type seal ring, and gas and liquid in a working area G area and a seal protection area Y area are prevented from communicating.
The static seal, the piston dynamic seal of the second tire-shaped seal ring 3 and the piston rod dynamic seal of the I-shaped seal ring 7 form an integral sealing system, so that the sealing effect is effectively improved.
As shown in fig. 1, in the present embodiment:
an atmosphere zone on the left side of the piston 4 is formed on the leftmost side of the hydraulic cylinder barrel 2, the atmosphere zone is communicated with the atmosphere through a bent pipe, and a brake screw plug 17 is installed at the end of the bent pipe.
The left side of the piston 4 is provided with a tire-shaped brake sealing ring 16, and the brake sealing ring 16 is provided with a small through hole d communicated with the atmosphere zone.
Line breaking braking principle: the broken wire braking function is achieved by utilizing the atmospheric layer area. When the abnormal broken line occurs, the high-pressure gas pushes the piston to drive the piston rod to retract rapidly, the air in the area D enables the sealing ring to expand to play a sealing role due to the rapid rise of the pressure of the damping hole, so that the air pressure in the area D increases sharply, the blocked speed of the piston slows down automatically, the retreating speed of the piston enables the pressure in the area D to reduce, the piston retreats and accelerates, the damping is increased, the speed of the piston slows down, the piston retreats and returns slowly in cycles, the braking effect is achieved, and the compensation device is prevented from being damaged due to the abnormal broken line.
Specifically, the utility model discloses compensation arrangement G district, C district link to each other through the aperture, make the high-pressure gas that fills link up in G district, C district, and piston right side tire type sealing washer, well isolation seat left side tire type sealing washer. The Y area leads high-pressure liquid to penetrate through the inner cavity, the outer cavity, the I-shaped sealing ring between the front cover and the piston, the I-shaped sealing ring between the middle isolation seat and the piston rod and the tire-shaped sealing ring on the right side of the middle isolation seat through small holes.
Specifically, high-pressure gas adopts 99.9% high-purity nitrogen, the inflation pressure is determined according to the compensated thread rated tension, the hydraulic oil in the Y area adopts high-temperature and low-temperature resistant anti-wear oil, a quantitative pump is used for filling a certain amount of hydraulic oil (ensuring that a cylinder barrel is completely wrapped by oil), then nitrogen is filled, the pressure is 0.2mpa greater than the working pressure in the working cylinder, the temperature changes due to the fact that the Y area is constant in volume, the internal pressure changes along with the temperature change, a gap Y is reserved between the left end of the functional sleeve and the middle seat, and the purpose is to ensure that the pressure in the Y area is not less than the working pressure in the working cylinder when the temperature changes.
Increased the hydraulic seal protection zone in the functional area in this application, this region has two characteristics: firstly, liquid is used as a special sealing medium in design, and the conventional practice that the liquid plays a double-layer role of a working medium and the sealing medium in the past is broken through, so that hydraulic oil with high viscosity can be selected as the sealing medium, and zero leakage can be realized; and secondly, due to the design of the area, when the compensating device is used, particularly when the piston rod extends out greatly under the condition of low temperature, the normal sealing of a sealing system cannot be damaged due to intermittent deformation and stiffness of the piston rod caused by wind vibration action caused by natural external force, particularly wind power pulsation.
The above, only be the embodiment of the preferred of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, which are designed to be replaced or changed equally, all should be covered within the protection scope of the present invention.
Claims (10)
1. A liquid-sealed air pressure type tension compensation device comprises a cylinder assembly formed by welding an energy storage cylinder (1), a single-acting hydraulic cylinder (2) and a left end cover and a right end cover, wherein the hydraulic cylinder (2) is inserted and welded in the energy storage cylinder (1) and coaxially arranged, and is characterized in that a piston (4), a piston rod (11), a middle isolation seat (5) and a right end cover (13) are arranged in the hydraulic cylinder (2), the interiors of the energy storage cylinder (1) and the hydraulic cylinder (2) are separated through the middle isolation seat (5), an independent hydraulic sealing protection area is formed between the right side of the middle isolation seat (5), the right end cover (13) and the inner wall of the energy storage cylinder (1), a working area is formed between the left side of the middle isolation seat (5) and the piston (4), an energy storage area positioned on the left side of the middle isolation seat (5) is formed between the inner wall of the energy storage cylinder (1) and the outer wall of the hydraulic cylinder (2), and a fixed amount of hydraulic oil is filled in the hydraulic sealing protection area as a sealing medium, and high-pressure gas not less than the gas pressure of the working area is filled in the hydraulic sealing protection area, the energy storage area is communicated with the working area through a small hole e on the side wall of the hydraulic cylinder (2), and the working area and the energy storage area are filled with high-pressure gas as a working medium and an energy storage medium.
2. The liquid-sealed pneumatic tension compensation device as claimed in claim 1, wherein two first tire-shaped sealing rings (6) are disposed on the middle isolation seat (5), and the left and right first tire-shaped sealing rings (6) are respectively communicated with the working area and the hydraulic seal protection area through small holes a on the left and right sides of the middle isolation seat (5) to introduce high-pressure gas and high-pressure liquid for internal static sealing.
3. The liquid-sealed pneumatic tension compensation device as claimed in claim 1 or 2, wherein an inflation valve (15) for inflating the interior of the energy storage cylinder (1) is arranged on the left end cover (12), and a liquid inflation valve (14) for inflating the liquid into the hydraulic sealing protection area is arranged on the right end cover (13).
4. The pneumatic type liquid-sealed tension compensation device as claimed in claim 3, wherein the hydraulic cylinder (2) is filled with hydraulic oil at the inner and outer periphery thereof in the protection area of the hydraulic seal, and high-pressure gas is filled above the hydraulic oil.
5. The liquid-sealed air pressure type tension compensation device as claimed in claim 1, wherein an i-shaped sealing ring (7) is respectively arranged on the intermediate isolation seat (5) and between the right end cover (13) and the piston rod (11), a fixed compression ring (8) with a small hole is sleeved in the i-shaped sealing ring (7), the i-shaped sealing ring (7) is fixed and compressed by a compression nut (9), and high-pressure liquid is respectively introduced into the i-shaped sealing ring (7) through a small hole a on the right side of the isolation seat (5) and a small hole b on the right end cover (13); a polytetrafluoroethylene sleeve is pressed and adhered on the piston rod (11) to reduce friction.
6. The liquid-sealed pneumatic tension compensation device as claimed in claim 1, wherein the piston (4) is provided with a second tire-shaped seal ring (3), a small hole c communicated with the second tire-shaped seal ring (3) is provided on the right side of the piston (4), and high-pressure gas is filled into the second tire-shaped seal ring (3) through the small hole c.
7. A liquid-tight pneumatic tension compensator according to claim 1, characterized by a length of functional jacket (10) between the middle isolation seat (5) and the right end cap (13) to form a sealed protection zone.
8. A liquid-tight pneumatic tension compensator as claimed in claim 1, characterised in that the right end cap (13) is bolted to the cylinder assembly and forms a static seal with the inner diameter of the hydraulic cylinder (2) by means of an O-ring seal (18).
9. A liquid-tight pneumatic tension compensator according to claim 1, characterized in that the hydraulic cylinder (2) forms, at its left-most side, an atmosphere zone on the left side of the piston (4), said atmosphere zone being connected to the atmosphere via a bent pipe, the end of which is fitted with a brake screw (17).
10. A liquid-tight pneumatic tension compensator according to claim 9, characterized in that a tyre-type brake seal (16) is provided on the left side of the piston (4), and the brake seal (16) is provided with a small through hole d communicating with the atmosphere zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122819316.1U CN217124605U (en) | 2021-11-17 | 2021-11-17 | Liquid-sealed air pressure type tension compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122819316.1U CN217124605U (en) | 2021-11-17 | 2021-11-17 | Liquid-sealed air pressure type tension compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217124605U true CN217124605U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122819316.1U Active CN217124605U (en) | 2021-11-17 | 2021-11-17 | Liquid-sealed air pressure type tension compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217124605U (en) |
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2021
- 2021-11-17 CN CN202122819316.1U patent/CN217124605U/en active Active
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