CN201731013U

CN201731013U - Self-propelled oil return buffer

Info

Publication number: CN201731013U
Application number: CN2010202244046U
Authority: CN
Inventors: 杨秀丽
Original assignee: Individual
Current assignee: Liaoning Kasiting Electromechanical Equipment Co Ltd
Priority date: 2010-06-12
Filing date: 2010-06-12
Publication date: 2011-02-02
Anticipated expiration: 2020-06-12

Abstract

The utility model discloses a self-propelled oil return buffer, which belongs to the technical field of power transmission and transformation, provides buffer for an on-and-off valve of a spring operating mechanism of a high-voltage circuit breaker, and comprises a buffer cylinder, a cylinder liner, a buffer piston, a cylinder plug and the like, wherein the cylinder liner is positioned in the buffer cylinder, and the lower end of the buffer piston is arranged in the cylinder liner; and the buffer piston and the cylinder liner are sealed in the buffer cylinder by the cylinder plug, and a small amount of hydraulic oil is filled in the buffer cylinder. The self-propelled oil return buffer has simple structure, low oil consumption and fast oil return speed.

Description

A kind of self-propelled return oil buffer

Technical field

The utility model belongs to the power transmission and transformation technical field, and particularly a kind of divide-shut brake to high-voltage breaker spring operating mechanism provides a kind of self-propelled return oil buffer of buffering.

Technical background

Buffer is the high-voltage breaker spring operating mechanism pith, the buffering when primary cut-out separating brake, closing operation are provided, and present buffer major part is the buffer of nature oil return, the structure more complicated, the technological requirement height, its oil return speed is slower, and the hydraulic oil of usefulness is many.So because the blanking time of the slow buffering once more of oil return speed is long, damping characteristics is instability when quick repeatable operation, operations such as the high-speed reclosure of inapplicable primary cut-out.

Summary of the invention

The purpose of this utility model provides a kind of self-propelled return oil buffer, and to solve traditional buffer structure complexity, the technological requirement height uses the speed of Chuck Steak and oil return to wait technical problem slowly.

A kind of self-propelled return oil buffer described in the utility model, it comprises that cushion dashpot, cylinder sleeve, damper piston and cylinder are stifled; Cylinder sleeve is set in the cushion dashpot, and the cylinder sleeve lower end surface contacts with the cushion dashpot inner bottom surface, and the lower end of damper piston places cylinder sleeve, and the damper piston upper end partly is connected with mechanism driving, and the stroke of damper piston is in cylinder sleeve; The stifled lower end of cylinder outer wall ring-type table top contacts with cylinder sleeve upper end anchor ring, the stifled outer wall of cylinder is provided with three road grooves, seal ring is installed in the groove, the position of lower end groove is in sealing cylinder sleeve upper end inwall and the stifled outer wall place, lower end of cylinder, the position of upper end twice groove is in sealing cushion dashpot inwall and the stifled outer wall place of cylinder, the stifled outer wall of cylinder upper end is provided with screw thread, fixedlys connected with cushion dashpot upper end screw thread; Cylinder stifled with cushion dashpot on be connected after, cylinder sleeve is locked in the cushion dashpot, the damper piston lower end places in the cylinder sleeve; The stifled inwall of cylinder also is provided with groove, install successively from top to bottom prevent dust enter the dust ring of cushion dashpot from the outside, make damper piston be positioned the stifled axle center of cylinder first guide ring, prevent that inner hydraulic oil from squeezing out the seal ring of cylinder body and making damper piston be positioned second guide ring that cylinder blocks up the axle center from the gap of buffering piston with the stifled inwall of cylinder; A spot of hydraulic oil will be charged in the cushion dashpot.

Above-mentioned a kind of self-propelled return oil buffer, cylinder sleeve and cushion dashpot gap, be communicated with described cushion dashpot by the aperture on the described cylinder bore wall, be formed in branch, the making process, be cushioned the current return circuit that piston is expressed to a small amount of low-pressure hydraulic oil in cylinder sleeve and cushion dashpot gap; Described damper piston and described cylinder block up the gap, are communicated with cushion dashpot by aperture on the described cylinder bulkhead and the aperture on the described cylinder bore wall, form the way to cycle oil of a small amount of low-pressure hydraulic oil that is extruded to described damper piston and the stifled gap of described cylinder.

Above-mentioned a kind of self-propelled return oil buffer charges into a small amount of hydraulic oil in the oil hydraulic cylinder.

The utlity model has simple in structurely, few with oil, and advantage such as oil return speed is fast, also having the working position is any spatiality, and therefore the restriction that not influenced by oil level, is convenient to install and use under various damped condition situations.

Description of drawings

Fig. 1 is a self-propelled return oil buffer generalized section in the utility model example;

Fig. 2 is a schematic representation behind the self-propelled return oil buffer splitting lock cushioning in the utility model example;

Fig. 3 is a self-propelled return oil buffer combined floodgate buffering back schematic representation in the utility model example;

Embodiment

Concrete structure of the present utility model and working principle are referring to accompanying drawing.

Referring to Fig. 1, wherein, 1, damper piston, 2, cylinder is stifled, 3, cushion dashpot, 4, cylinder sleeve, 5, hydraulic oil, 6, dust ring, 7, guide ring, 8, seal ring, 9, seal ring, 10, seal ring, 11, hole a, 12, hole b.Self-propelled return oil buffer of the present utility model, spring operating mechanism is fixed in cushion dashpot 3 lower ends, transmission crank arm is fixed in damper piston 1 upper end, driving damper piston 1 when the spring operating mechanism divide-shut brake moves moves up and down in cushion dashpot, as shown in Figure 1, cylinder sleeve 4 is set in the cushion dashpot 3, cylinder sleeve 4 lower ends contact with cushion dashpot 3 inner bottom surfaces, the lower end of damper piston 1 places cylinder sleeve 4, the upper end partly is connected with mechanism driving, damper piston 1 can move up and down in cylinder sleeve 4, the stifled 2 lower end outer wall ring-type table tops of cylinder contact with cylinder sleeve 4 upper end anchor rings, the outer wall of cylinder stifled 2 is provided with three road grooves, seal ring is installed in the groove, the lower end groove is equipped with the gap of seal ring 9 sealing cylinder sleeve 4 upper end inwalls and the stifled 2 lower end outer walls of cylinder, upper end twice groove is installed the gap of seal ring 10 sealing cushion dashpot 3 inwalls and stifled 2 outer walls of cylinder, stifled 2 outer walls of cylinder upper end is provided with screw thread, fixedly connected with cushion dashpot 3 upper end screw threads, with cushion dashpot 3, cylinder sleeve 3 and cylinder block up 2 fixing and lockings, the inner ring surface of cylinder stifled 2 also is provided with groove, dust ring 6 is installed from top to bottom successively, guide ring 7, seal ring 8 and guide ring 7, dust ring 6 prevents that dust from entering cushion dashpot 3 from the outside, the central shaft that two guide rings 7 make damper piston 1 be positioned cylinder stifled 2 moves up and down, seal ring 8 prevents that inner hydraulic oil is squeezed out cushion dashpot 3 from the gap of buffering piston 1 and stifled 2 inwalls of cylinder, cylinder stifled 2 is sealed in damper piston 1 and cylinder sleeve 4 in the cushion dashpot 3, will charge into a spot of hydraulic oil 5 in the cushion dashpot 3.Will not be full of by oil hydraulic cylinder,, absorb that energy is enough to get final product as long as in when buffering.

Self-propelled return oil buffer has two states: schematic representation behind the self-propelled return oil buffer splitting lock cushioning as shown in Figure 2, Fig. 3 self-propelled return oil buffer buffering back schematic representation that closes a floodgate, buffer is changed between two states all the time.

Working method when the utility model self-propelled return oil buffer:

Splitting lock cushioning: when the operation mechanism separating brake moves, operation mechanism conducts power in damper piston 1 by transmission crank arm, this moment, the self-retreating return oil buffer was in the state of Fig. 3, move downward after damper piston 1 is stressed, push the hydraulic oil 5 of damper piston 1 lower end to cushion dashpot 3 bottoms, when damper piston 1 base plane when contacting fully above the hydraulic oil 5, the hydraulic oil 5 beginning buffering course that is squeezed, the power of damper piston 1 is pushed upside to cushion dashpot 3 with hydraulic oil 5 from the gap of buffering piston 1 outer wall and cylinder sleeve 4 inwalls, both upper ring surfaces of damper piston 1 bottom, contacting the splitting lock cushioning process up to damper piston 1 bottom surface fully with cushion dashpot 3 bottom surfaces finishes, the a small amount of low-pressure hydraulic oil 5 that is extruded in the splitting lock cushioning process in cushion dashpot 3 inwalls and the cylinder sleeve 4 outer wall gaps flow back into 3 li of cushion dashpots by the aperture b12 on cylinder sleeve 4 walls, be expressed to damper piston 1 and flow back into 3 li of cushion dashpots by aperture a11 on stifled 2 walls of cylinder and the aperture b12 on cylinder sleeve 4 walls with a small amount of low-pressure hydraulic oil 5 that cylinder blocks up 2 gaps, hydraulic bjuffer oil return process is finished, the state behind self-retreating return oil buffer state-transition Fig. 2 splitting lock cushioning.

Close a floodgate and cushion: when the operation mechanism feed motion, operation mechanism conducts power in damper piston 1 by transmission crank arm, this moment, the self-retreating return oil buffer was in the state of Fig. 2, move upward after damper piston 1 is stressed, push the hydraulic oil 5 of damper piston 1 bottom upper ring surface to cushion dashpot 3 tops and stifled 2 bottom surfaces of cylinder, when contacting fully with stifled 2 bottom surfaces of cylinder above the hydraulic oil 5 of damper piston 1 bottom upper ring surface, the hydraulic oil 5 beginning buffering course that is squeezed, the power of damper piston 1 is pushed bottom to cushion dashpot 3 with hydraulic oil 5 from the gap of buffering piston 1 bottom outer wall and cylinder sleeve 4 inwalls, both damper piston 1 below, contacting the combined floodgate buffering course fully up to stifled 2 bottom surfaces of damper piston 1 bottom upper ring surface and cylinder finishes, while is flow back in the cushion dashpot 3 by the aperture b12 on cylinder sleeve 4 walls by a small amount of low-pressure hydraulic oil 5 that making process is expressed to cylinder sleeve 4 and cushion dashpot 3 gaps, be expressed to damper piston 1 and flow back into 3 li of cushion dashpots by aperture a11 on stifled 2 walls of cylinder and the aperture b12 on cylinder sleeve 4 walls with a small amount of low-pressure hydraulic oil 5 that cylinder blocks up 2 gaps, hydraulic bjuffer oil return process is finished, self-retreating return oil buffer state-transition Fig. 3 close a floodgate the buffering after state.

Claims

1. a self-propelled return oil buffer is characterized in that, it comprises that cushion dashpot, cylinder sleeve, damper piston and cylinder are stifled; Cylinder sleeve is set in the cushion dashpot, and the cylinder sleeve lower end surface contacts with the cushion dashpot inner bottom surface, and the lower end of damper piston places cylinder sleeve, and the damper piston upper end partly is connected with mechanism driving, and the stroke of damper piston is in cylinder sleeve; The stifled lower end of cylinder outer wall ring-type table top contacts with cylinder sleeve upper end anchor ring, the stifled outer wall of cylinder is provided with three road grooves, seal ring is installed in the groove, the position of lower end groove is in sealing cylinder sleeve upper end inwall and the stifled outer wall place, lower end of cylinder, the position of upper end twice groove is in sealing cushion dashpot inwall and the stifled outer wall place of cylinder, the stifled outer wall of cylinder upper end is provided with screw thread, fixedlys connected with cushion dashpot upper end screw thread; Cylinder stifled with cushion dashpot on be connected after, cylinder sleeve is locked in the cushion dashpot, the damper piston lower end places in the cylinder sleeve; The stifled inwall of cylinder also is provided with groove, install successively from top to bottom prevent dust enter the dust ring of cushion dashpot from the outside, make damper piston be positioned the stifled axle center of cylinder first guide ring, prevent that inner hydraulic oil from squeezing out the seal ring of cylinder body and making damper piston be positioned second guide ring that cylinder blocks up the axle center from the gap of buffering piston with the stifled inwall of cylinder; A spot of hydraulic oil will be charged in the cushion dashpot.

2. according to the described a kind of self-propelled return oil buffer of claim 1, it is characterized in that, cylinder sleeve and cushion dashpot gap, be communicated with described cushion dashpot by the aperture on the described cylinder bore wall, be formed in branch, the making process, be cushioned the current return circuit that piston is expressed to a small amount of low-pressure hydraulic oil in cylinder sleeve and cushion dashpot gap; Described damper piston and described cylinder block up the gap, are communicated with cushion dashpot by aperture on the described cylinder bulkhead and the aperture on the described cylinder bore wall, form the way to cycle oil of a small amount of low-pressure hydraulic oil that is extruded to described damper piston and the stifled gap of described cylinder.

3. according to the described a kind of self-propelled return oil buffer of claim 1, it is characterized in that charging in the oil hydraulic cylinder a small amount of hydraulic oil.