CN216424148U

CN216424148U - Pneumatic-hydraulic tension compensation device

Info

Publication number: CN216424148U
Application number: CN202122816755.7U
Authority: CN
Inventors: 赵永莉; 马小英
Original assignee: Xi'an Knorr Rail Transit Technology Co ltd
Current assignee: Xi'an Knorr Rail Transit Technology Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-05-03
Anticipated expiration: 2031-11-17

Abstract

The utility model discloses a gas-hydraulic tension compensation device, which comprises a cylinder barrel assembly formed by welding an energy storage barrel, a hydraulic cylinder barrel, a left end cover and a right end cover, wherein a center shaft of the hydraulic cylinder barrel and a center shaft of a cylindrical barrel on the upper part of the energy storage barrel form a certain eccentric distance when in working state; the hydraulic cylinder is internally provided with a piston, a piston rod, a middle seat and a right end cover, and is sequentially divided into an atmospheric layer area, a working area and a sealing protection area from left to right through the piston and the middle seat, hydraulic oil is filled in the hydraulic cylinder and the periphery of the hydraulic cylinder, an energy storage area is formed at the upper part of the energy storage cylinder, and high-pressure gas is filled in the energy storage area to serve as an energy storage medium. The utility model discloses sealing system comprises tire type piston seal circle and I-shaped piston rod seal circle and the sealing medium of the high-pressure liquid of leading-in sealing washer intracavity, has introduced the concept in sealed protection district on the structural design, has overcome the low temperature load leakage problem of current compensation arrangement ubiquitous, all can accomplish reliably sealedly at all temperature points of environment.

Description

Pneumatic-hydraulic tension compensation device

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 hydraulic 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, energy storage media and working media are all gas, but the pneumatic tension compensation device has the biggest problem that sealing is not closed too much, particularly, when the environment temperature is low, a piston rod (telescopic rod) stretches out for a long time, the pneumatic tension compensation device is horizontally suspended, and under the action of vertical external force wind power, gravity and the like, the piston rod is blocked to leak gas;

2, the gas-hydraulic pressure compensation device, the device also generally exists that when the ambient temperature is low, the piston rod (telescopic link) stretches out too long, the compensation device hangs horizontally, under the action of vertical external force wind power, gravity and the like, especially the wind vibration influence caused by the wind power pulsation effect is that the piston rod (telescopic link) hangs out too long and leads to poor and produce intermittent distortion, hold back power, destroyed the sealing washer and the degree of tightness of sliding surface and appear leaking. Meanwhile, the hydraulic compensation device is provided with a force varying mechanism or a compensation device with a hydraulic system control system. In addition to the above disadvantages, there are also: the compensating device has the defects of too many links, inconvenient installation, poor compensation sensitivity and low compensation precision. The working medium of the gas-liquid compensation device is a polymer elastomer solution, so that the gas-liquid compensation device has the characteristics of compressibility and viscoelasticity, the energy consumption (overcoming viscosity) of temperature change is large, meanwhile, the elastomer deforms to store energy, and the heat energy of the gas temperature change of the compensation device cannot effectively compensate the change caused by the temperature of compensated clues, so that the compensation device cannot achieve the compensation effect or has poor compensation precision. Pneumatic, gas-liquid (hydro-pneumatic) or hydraulic tension compensation devices have not been used as usual because of the above disadvantages.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point that above-mentioned compensation arrangement exists, and provide a reliable compensation accuracy requirement and realize electrified contact network line tensile pneumatic-hydraulic formula tension automatic compensation arrangement, when improving the compensation precision, overcome current compensation arrangement ubiquitous low temperature load and leak the problem.

The technical scheme of the utility model is specifically as follows:

a gas-hydraulic pressure type tension compensation device comprises a cylinder barrel assembly formed by welding an energy storage barrel, a hydraulic cylinder barrel and left and right end covers, wherein the vertical section of the energy storage barrel is elliptical, the hydraulic cylinder barrel is inserted and welded at the bottom of the energy storage barrel, so that a certain eccentric distance e is formed between the central shaft of the hydraulic cylinder barrel and the central shaft of a cylindrical barrel at the upper part of the energy storage barrel when the central shafts are at working state positions, and the compensation device is filled with two media of high-pressure gas and hydraulic oil; the hydraulic cylinder is internally provided with a piston, a piston rod, a middle seat and a right end cover, and is sequentially divided into an atmospheric layer area D, a working area G and a sealing protection area B from left to right through the piston and the middle seat, high-pressure hydraulic oil is filled in the hydraulic cylinder and on the periphery of the hydraulic cylinder, the working area G and the sealing protection area B are respectively used as working media and sealing media, an energy storage area C is formed on the upper part of the energy storage cylinder, and high-pressure gas is filled in the energy storage area C and is used as energy storage media.

Further, a tire-shaped sealing ring is arranged on the piston, an I-shaped sealing ring is arranged between the right end cover of the hydraulic cylinder barrel and the piston rod, the energy storage area, the working area and the sealing protection area are communicated through a small hole a, the tire-shaped sealing ring is communicated with the working area, and the I-shaped sealing ring is communicated with the sealing protection area.

Furthermore, a supporting compression ring with a small hole a is sleeved in the I-shaped sealing ring, the I-shaped sealing ring is fixed and compressed through a compression nut, and high-pressure hydraulic oil enters the I-shaped sealing ring through the small hole a.

Furthermore, a small hole b communicated with the tire type sealing ring is formed in the right side of the piston, and high-pressure hydraulic oil enters the tire type sealing ring through the small hole b.

Furthermore, a valve for filling high-pressure gas or hydraulic oil into the energy storage cylinder is arranged on the left end cover of the energy storage cylinder.

Furthermore, the atmosphere zone is communicated with the atmosphere through an elbow pipe, a brake plug screw is installed at the end of the elbow pipe, a tire-shaped brake sealing ring is arranged on the left side of the piston, and a small through hole c communicated with the atmosphere zone is formed in the brake sealing ring.

Furthermore, a polytetrafluoroethylene guide sleeve is arranged between the middle seat and the piston rod, and a functional sleeve with a certain length is arranged between the middle seat and the right end cover to form a sealing protection area.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model discloses well hydraulic cylinder and energy storage section of thick bamboo upper portion cylinder section of thick bamboo center have offset distance e, inside and the periphery at hydraulic cylinder are filled with hydraulic oil, form the energy storage district on the upper portion of an energy storage section of thick bamboo, and it is as the energy storage medium to be filled with high-pressure gas inside it, because of gas and hydraulic oil density difference, oil has incompressibility again in addition, oil and gas natural separation, gas is in the top, oil is than great inside and outside being in below hydraulic cylinder, links such as gasbag have been reduced, moreover, the steam generator is simple in structure, the compensation is sensitive, and reliability is realized, and the compensation precision is improved.

(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 B zone (a sealing protection zone); a D area is arranged to introduce a broken wire braking function, so that the compensation device is prevented from being damaged due to abnormal broken wires; the concept of a sealing protection area B is introduced on a functional area, and the addition of the area enables the compensation device not to damage the normal sealing of a sealing system due to intermittent deformation and stiffness of a piston rod caused by wind vibration action caused by natural external force, particularly wind pulsation, when the piston rod extends out greatly in use, particularly under the condition of low temperature. The purpose of the sealing protection area is to ensure that the device can realize reliable sealing at all temperature points of the environment in use, and the problem of low-temperature load leakage commonly existing in the existing compensation device is solved.

(3) The utility model discloses well movive seal has adopted the design of systematic seal structure. The whole sealing system consists of a tyre-shaped piston sealing ring, an I-shaped piston rod sealing ring and a sealing medium of high-pressure liquid introduced into a working area, a sealing protection area and a sealing ring cavity. The sealing mechanism is that the working medium of high-pressure liquid is used as a sealing medium and is led into the inner cavities of the tire-shaped sealing ring and the I-shaped sealing ring to enable the sealing ring to tightly press the moving contact surface for effective sealing.

Drawings

Fig. 1 is the cross-sectional structure diagram of the gas-hydraulic tension compensation device of the present invention.

In the figure, an energy storage cylinder 1, a hydraulic cylinder barrel 2, a tyre-shaped sealing ring 3, a piston 4, a middle seat 5, a guide sleeve 6, a gland nut 7, a functional sleeve 8, a supporting gland ring 9, an I-shaped sealing ring 10, a right end cover 11, a left end cover 12, a piston rod 13, a braking sealing ring 14, a braking screw plug 15, a valve 16, an atmosphere zone D zone, a working zone G zone, a sealing protection zone B zone and an energy storage zone C zone.

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 gas-hydraulic tension compensation device comprises a cylinder assembly formed by welding an energy storage cylinder 1, a hydraulic cylinder 2 and left and right end covers, wherein the vertical section of the energy storage cylinder 1 is elliptical, the hydraulic cylinder 2 is inserted and welded at the bottom of the energy storage cylinder 1, so that a certain eccentric distance e is formed between the central shaft of the hydraulic cylinder 2 and the central shaft of a cylinder at the upper part of the energy storage cylinder 1 when the central shafts are at working positions, and the compensation device is filled with two media of high-pressure gas and hydraulic oil; the hydraulic cylinder 2 is internally provided with a piston 4, a piston rod 13, a middle seat 5 and a right end cover 11, the hydraulic cylinder 2 is sequentially divided into an atmospheric zone D, a working zone G and a sealing protection zone B from left to right through the piston 4 and the middle seat 5, hydraulic oil is filled in the hydraulic cylinder 2 from the inside and the periphery, the working zone G and the sealing protection zone B are respectively used as a working medium and a sealing medium, an energy storage zone C is formed at the upper part of the energy storage cylinder 1, and high-pressure gas is filled in the energy storage zone C as an energy storage medium.

As shown in fig. 1, a tire-shaped seal ring 3 is arranged on the piston 4, an i-shaped seal ring 10 is arranged between a right end cover 11 and a piston rod 13 of the hydraulic cylinder 2, the energy storage area C and the working area G are communicated with the sealing protection area B through a small hole a, the tire-shaped seal ring 3 is communicated with the working area G, and the i-shaped seal ring 10 is communicated with the sealing protection area B.

The G area, the C area and the B area are connected through a small hole a, so that the filled high-pressure gas pushes the high-pressure hydraulic oil to penetrate through the G area, the C area, the B area, the tire-shaped sealing ring 3 and the I-shaped sealing ring 10.

As shown in fig. 1, a supporting compression ring 9 with a small hole is sleeved in the i-shaped sealing ring 10, the i-shaped sealing ring 10 is fixed and compressed by a compression nut 7, and high-pressure hydraulic oil enters the i-shaped sealing ring 10 through a small hole a on a right end cover 11.

In this embodiment, high-pressure hydraulic oil enters the i-shaped sealing ring 10 through the small hole a to form a dynamic sealing structure of the piston rod.

As shown in fig. 1, a small hole b communicated with the tire type seal ring 3 is formed in the right side of the piston 4, and high-pressure hydraulic oil enters the tire type seal ring 3 through the small hole b.

In this embodiment, high-pressure hydraulic oil is introduced into the tire seal 3 through the small hole b at the piston end, so as to form a dynamic seal structure of the piston.

As shown in fig. 1, a valve 16 for filling high-pressure gas or hydraulic oil into the energy storage cylinder 1 is provided on the left end cover 12 of the energy storage cylinder 1.

The utility model discloses the center pin of well hydraulic cylinder 2 and the center pin of the upper portion cylinder of energy storage section of thick bamboo 1 have offset distance e, energy storage section of thick bamboo left end lid 12 is equipped with the valve 16 of aerifing or filling liquid in energy storage section of thick bamboo 1, make the compensation arrangement fill with two kinds of media (high-pressure gas, hydraulic oil), fill with a certain amount of high-quality engineering hydraulic oil at first, the oil filling volume is that the pneumatic cylinder just in time buries in the hydraulic oil when the piston rod withdraws completely, fill with the high-purity nitrogen gas of certain pressure at last, the weight of oil in the work is big and incompressible, make the compensation arrangement energy storage section of thick bamboo upper portion form high-pressure gas namely the energy storage medium, form high-pressure hydraulic oil namely work medium and sealing medium inside and outside the hydraulic cylinder; the links such as air bags and the like are reduced, the structure is simple, and the compensation is sensitive and reliable.

The utility model discloses well compensation arrangement overall structure forms 4 functional areas: the concept of a sealed protection area is introduced into a functional area, namely a D area (communicated with the atmosphere), a G area (a piston motion working area in a cylinder), a C area (an energy storage area) and a B area (a sealed protection area). The area is increased, so that when the compensating device is used, particularly when the piston rod extends out greatly under the condition of low temperature, the piston rod cannot be intermittently deformed and feel hard to damage the normal sealing of a sealing system due to the wind vibration caused by natural external force, particularly wind power pulsation. The purpose of the sealing protection zone is to make the device reliable in use at all temperature points of the environment.

The utility model discloses form static seal (can realize sealing connection through O type sealing washer) between well right-hand member lid 11 and the 2 internal diameters of hydraulic cylinder, and the movive seal has adopted the design of systematic seal structure. The whole sealing system consists of a tyre-shaped piston sealing ring 3, an I-shaped piston rod sealing ring 10 and a sealing medium of high-pressure liquid introduced into a working area, a sealing protection area and a sealing ring cavity. The sealing mechanism is that the working medium of high-pressure liquid is used as a sealing medium and is led into the inner cavities of the tire-shaped sealing ring and the I-shaped sealing ring to enable the sealing ring to tightly press the moving contact surface for effective sealing.

As shown in fig. 1, the atmosphere zone D is connected to the atmosphere through an elbow pipe, a brake plug screw 15 is installed at an end of the elbow pipe, a tire-type brake sealing ring 14 is arranged on the left side of the piston 4, and a small through hole c communicated with the atmosphere zone is arranged on the brake sealing ring 14.

Line breaking braking principle: when abnormal broken lines occur, the high-pressure liquid pushes the piston 4 to drive the piston rod 13 to retract rapidly, the pressure of the air in the D area is increased rapidly due to the damping effect of the brake screw plug 15, the sealing ring is expanded to play a sealing effect, the air pressure in the D area is increased sharply, the blocking speed of the piston is reduced automatically, the retreating speed of the piston is reduced to reduce the pressure in the D area, the piston retreats and accelerates, the damping is increased, the speed of the piston is reduced, the process is repeated, the piston is slowly retreated to play a braking effect, and the compensation device is prevented from being damaged due to the abnormal broken lines.

As shown in fig. 1, a polytetrafluoroethylene guide sleeve 6 is disposed between the middle seat 5 and the piston rod 13, and a functional sleeve 8 with a certain length is disposed between the middle seat 5 and the right end cap 11 to form a sealing protection area.

The above, only be the concrete implementation of the preferred embodiment 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, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A gas-hydraulic pressure type tension compensation device comprises a cylinder barrel assembly formed by welding an energy storage barrel (1), a hydraulic cylinder barrel (2) and left and right end covers, and is characterized in that the vertical section of the energy storage barrel (1) is oval, the hydraulic cylinder barrel (2) is inserted and welded at the bottom of the energy storage barrel (1), so that a central shaft of the hydraulic cylinder barrel (2) and a central shaft of a cylindrical barrel at the upper part of the energy storage barrel (1) form a certain eccentric distance in a working state, and two media of high-pressure gas and hydraulic oil are filled in the compensation device; the hydraulic cylinder (2) is internally provided with a piston (4), a piston rod (13), a middle seat (5) and a right end cover (11), the hydraulic cylinder (2) is sequentially divided into an atmospheric layer area, a working area and a sealing protection area from left to right through the piston (4) and the middle seat (5), high-pressure hydraulic oil is filled in the hydraulic cylinder (2) and the periphery of the hydraulic cylinder, the working area and the sealing protection area are respectively used as a working medium and a sealing medium, an energy storage area is formed at the upper part of the energy storage cylinder (1), and high-pressure gas is filled in the energy storage area to be used as an energy storage medium.

2. The gas-liquid pressure type tension compensation device according to claim 1, wherein a tire-shaped seal ring (3) is arranged on the piston (4), an i-shaped seal ring (10) is arranged between a right end cover (11) and a piston rod (13) of the hydraulic cylinder (2), the energy storage area, the working area and the sealing protection area are communicated through a small hole a, the tire-shaped seal ring (3) is communicated with the working area, and the i-shaped seal ring (10) is communicated with the sealing protection area.

3. The gas-liquid pressure type tension compensation device according to claim 2, wherein a support compression ring (9) with a small hole is sleeved in the I-shaped sealing ring (10), the I-shaped sealing ring (10) is fixed and compressed through a compression nut (7), and high-pressure hydraulic oil enters the I-shaped sealing ring (10) through a small hole a in a right end cover (11).

4. The gas-hydraulic pressure type tension compensating device according to claim 2, wherein a small hole b communicated with the tire-shaped sealing ring (3) is formed in the right side of the piston (4), and high-pressure hydraulic oil is introduced into the tire-shaped sealing ring (3) through the small hole b.

5. The gas-liquid pressure type tension compensation device according to claim 1, wherein a valve (16) for filling high-pressure gas or hydraulic oil into the energy storage cylinder (1) is arranged on the left end cover (12) of the energy storage cylinder (1).

6. A gas-liquid pressure type tension compensating device according to claim 1, wherein the atmosphere zone is communicated with the atmosphere through an elbow pipe, a brake screw plug (15) is installed at the end part of the elbow pipe, a tire-type brake sealing ring (14) is arranged on the left side of the piston (4), and a through small hole c communicated with the atmosphere zone is arranged on the brake sealing ring (14).

7. The gas-liquid pressure type tension compensation device according to claim 1, wherein a polytetrafluoroethylene guide sleeve (6) is provided between the intermediate seat (5) and the piston rod (13), and a functional sleeve (8) having a certain length is provided between the intermediate seat (5) and the right end cap (11) to form a sealing protection zone.