CN110848200A

CN110848200A - Sealing element structure with good sealing effect for hydraulic cylinder

Info

Publication number: CN110848200A
Application number: CN201911290115.8A
Authority: CN
Inventors: 高宝书
Original assignee: Tianjin Yihuan Metal Machinery Manufacturing Co Ltd
Current assignee: Tianjin Yihuan Metal Machinery Manufacturing Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-02-28

Abstract

The invention discloses a sealing element structure for a hydraulic cylinder with good sealing effect, which comprises a lubricating device, a spring buffer piece, a second sealing component and a clamping groove, wherein the lubricating device is arranged at the rear end of an outer cylinder, a cylinder body is fixed with the outer cylinder through a fixing piece, an injection pipe at the left end of the cylinder body penetrates through the inner cylinder, then a proper amount of lubricating liquid is injected into the cylinder body through an injection plug, the lubricating liquid is filtered to a spongy cushion through a filter screen in a filter plate for absorption, then a push handle is transversely pressed, the push handle is stressed to extrude a spring rod, the spring rod is matched with a partition plate for compression, so that the press plate moves leftwards to extrude the spongy cushion, the spongy cushion is stressed for compression, lubricating oil at the inner side flows into the inner cylinder through the injection pipe for lubrication of a piston rod, after the lubrication is finished, the push handle is released to ensure that the parts of the spongy cushion are, the beneficial effect of avoiding the oil leakage of the hydraulic cylinder is achieved.

Description

Sealing element structure with good sealing effect for hydraulic cylinder

Technical Field

The invention relates to the technical field of hydraulic cylinders, in particular to a sealing piece structure for a hydraulic cylinder, which has a good sealing effect.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion or swinging motion, has simple structure and reliable work, can remove a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to hydraulic systems of various machines, and the clearance between a piston rod in the hydraulic cylinder and the hydraulic cylinder is often sealed by using a sealing element to prevent the leakage of oil liquid.

When the traditional sealing element structure for the hydraulic cylinder is used, the outer cylinder and the inner cylinder are assembled mutually, then the piston rod piece penetrates through the inner cylinder and is respectively embedded into ports on two sides of the inner cylinder through the sealing component, and the sealing of the piston rod is realized.

Disclosure of Invention

Technical problem to be solved

In order to overcome the prior art not enough, the sealing element structure for the pneumatic cylinder that sealed effectual has now been proposed, solve the current sealing element structure for the pneumatic cylinder that sealed effectual, along with the piston rod slides for a long time in the inner tube and produces frictional force, cause the inner tube slowly wearing and tearing, cause seal assembly and inner tube port deviation, easily make the interior fluid of pneumatic cylinder flow, hinder the problem of equipment normal operating, reached and carried out periodic lubrication to the interior piston rod of inner tube, eliminate the frictional force that piston rod and inner tube slided and produce, the beneficial effect of pneumatic cylinder fluid leakage is avoided appearing.

(II) technical scheme

The invention is realized by the following technical scheme: the invention provides a sealing element structure with good sealing effect for a hydraulic cylinder, which comprises an outer cylinder,

the lubricating device is used for lubricating the rod piece penetrating through the sealing piece;

the spring buffer piece is used for relieving the shaking force generated during the installation and operation of the equipment;

furthermore, the spring buffer part is spirally wound around the left side of the inner cylinder.

Further, an inner barrel is inlaid in the inner side of the outer barrel, the top of the rear end of the outer barrel is fixed with a lubricating device through a bolt, a first sealing assembly is vertically inserted into the top of the inner barrel, a through hole is formed in the middle of the first sealing assembly, a spring buffer piece is distributed around the outer side of the bottom of the inner barrel, a second sealing assembly is bonded to the bottom end of the spring buffer piece, and a clamping groove is formed in the periphery of the bottom end of the second sealing assembly.

Further, lubricating arrangement includes barrel, mounting, pushes away handle, injection stopper, injection syringe, spring beam, baffle, clamp plate and foam-rubber cushion, the both ends welding has the mounting about the barrel left side, barrel right side middle part is inserted and is equipped with and pushes away the handle, barrel right side top is inlayed and is had the injection stopper, barrel left side middle part is inserted and is equipped with the injection syringe, push away left side and spring beam elastic connection, the spring beam outside runs through with the baffle level, the welding of spring beam left end has the clamp plate, the clamp plate left side is provided with the foam-rubber cushion, both ends pass through mounting and urceolus bolt fastening about the barrel left side.

Further, the baffle includes filter plate, filter screen and slot, the filter screen has been inlayed at both ends about the filter plate, the slot has been seted up at the filter screen middle part, the filter screen middle part runs through slot and clamp plate level.

Further, the length of the injection tube is 6cm, and the left end of the injection tube is in a conical shape.

Furthermore, the pressing plate is T-shaped, and a layer of protective cushion is laid on the left side of the pressing plate.

Further, the foam-rubber cushion is square, and the thickness of the foam-rubber cushion is 5 cm.

Furthermore, the filter screen is symmetrically divided at the upper end and the lower end of the filter plate, and the diameter of the meshes of the filter screen is 0.3 mm.

Furthermore, the outer cylinder and the inner cylinder are made of stainless steel, so that the hardness is high, and the corrosion resistance is strong.

Furthermore, first seal assembly and second seal assembly are the butadiene-acrylonitrile rubber material, and toughness is good, and the leakproofness is strong.

(III) advantageous effects

Compared with the prior art, the invention has the following beneficial effects:

in order to solve the problem that the existing sealing element structure for the hydraulic cylinder with good sealing effect generates friction force along with the long-time sliding of a piston rod in an inner cylinder to cause the inner cylinder to be slowly worn to cause deviation of a sealing component and an end opening of the inner cylinder, so that oil in the hydraulic cylinder easily flows out and normal operation of equipment is hindered, a lubricating device is arranged at the rear end of the outer cylinder, the cylinder is fixed with the outer cylinder through a fixing piece, an injection pipe at the left end of the cylinder penetrates through the inner cylinder, then a proper amount of lubricating liquid is injected into the cylinder through an injection plug, the lubricating liquid is filtered to a sponge cushion through a filter screen in a filter plate to be absorbed, then a push handle is transversely pressed, the spring rod is stressed and extruded by the push handle, the press plate is moved leftwards to extrude the sponge cushion through matching compression of the spring rod and a partition plate, the lubricating liquid at the inner side flows into, the piston rod in the inner cylinder is lubricated regularly, friction force generated by sliding of the piston rod and the inner cylinder is eliminated, and oil leakage of the hydraulic cylinder is avoided.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of the outer cylinder of the present invention in front view;

FIG. 3 is a schematic view of the lubricating apparatus of the present invention;

FIG. 4 is a schematic cross-sectional view of the lubricating device of the present invention;

FIG. 5 is a schematic view of the separator structure of the present invention.

In the figure: the device comprises an outer cylinder-1, an inner cylinder-2, a lubricating device-3, a first sealing component-4, a through hole-5, a spring buffer component-6, a second sealing component-7, a clamping groove-8, a cylinder-31, a fixing component-32, a push handle-33, an injection plug-34, an injection tube-35, a spring rod-36, a partition plate-37, a pressure plate-38, a sponge pad-39, a filter plate-371, a filter screen-372 and a slot-373.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the present invention provides a sealing member structure for a hydraulic cylinder with good sealing effect: comprises an outer cylinder 1 and a plurality of rollers, wherein,

a lubricating device 3 for lubricating the rod member penetrating the sealing member;

the spring buffer 6 is used for relieving the shaking force generated during the installation and operation of the equipment;

wherein, the spring buffer 6 is spirally wound around the left side of the inner cylinder 2.

Wherein, 1 inboard of urceolus is inlayed and is had

inner tube

2, 1 rear end top of urceolus and 3 bolt fastening of lubricating arrangement, the vertical grafting in 2 tops of inner tube has first seal assembly 4, first seal assembly 4 middle parts are provided with through-

hole

5, 2 bottom outsides of inner tube encircle to distribute and have

spring bolster

6, 6 bottom bonds of spring bolster have second seal assembly 7, draw-in groove 8 has been seted up all around to 7 bottoms of second seal assembly.

Wherein, lubricating arrangement 3 includes barrel 31, mounting 32, pushes away 33, injection stopper 34, injection pipe 35, spring bar 36, baffle 37, clamp plate 38 and foam-rubber cushion 39, both ends welding has mounting 32 about barrel 31 left side, is favorable to the fixed mounting of equipment, barrel 31 right side middle part is inserted and is equipped with and pushes away 33, barrel 31 right side top is inlayed and is had injection stopper 34, is favorable to the interpolation of lubricating liquid, barrel 31 left side middle part is inserted and is equipped with injection pipe 35, push away 33 left side and 36 elastic connection of spring bar, be favorable to the elasticity of clamp plate 38 to reset, the spring bar 36 outside runs through with baffle 37 level, the welding of spring bar 36 left end has clamp plate 38, clamp plate 38 left side is provided with foam-rubber cushion 39, is favorable to the temporary storage of lubricating oil, both ends pass through mounting 32 and 1 bolt fastening of urceolus about barrel 31 left side.

Wherein, baffle 37 includes filter plate 371, filter screen 372 and slot 373, the filter screen 372 is inlayed at both ends about filter plate 371, is favorable to the circulation of lubricating oil, slot 373 has been seted up at filter screen 372 middle part, is favorable to, filter screen 372 middle part is run through with the clamp plate 38 level through slot 373.

The length of the injection pipe 35 is 6cm, and the left end of the injection pipe 35 is in a conical shape, so that the injection of lubricating oil is facilitated.

The pressing plate 38 is in a T shape, and a layer of protective pad is laid on the left side of the pressing plate 38, so that splashing of lubricating oil in the extrusion process is prevented.

Wherein, the foam-rubber cushion 39 is square, and the thickness of the foam-rubber cushion 39 is 5cm, which is beneficial to the temporary storage of the lubricating oil.

Wherein, the filter screen 372 is symmetrically divided at the upper end and the lower end of the filter plate 371, and the diameter of the meshes of the filter screen 372 is 0.3mm, which is beneficial to the circulation of lubricating oil.

The outer cylinder 1 and the inner cylinder 2 are made of stainless steel materials, and are high in hardness and strong in corrosion resistance.

The first sealing component 4 and the second sealing component 7 are made of nitrile rubber, so that the toughness is good, and the sealing performance is strong.

The first sealing component 4 and the second sealing component 7 are made of nitrile rubber, the nitrile rubber is prepared from butadiene and acrylonitrile by emulsion polymerization, the nitrile rubber is mainly produced by low-temperature emulsion polymerization, the oil resistance is excellent, the wear resistance is high, the heat resistance is good, the bonding force is strong, the defects are that the low-temperature resistance is poor, the ozone resistance is poor, the insulating property is poor, and the elasticity is slightly low, the nitrile rubber is mainly used for manufacturing oil-resistant rubber products, namely NBR for short, a synthetic rubber prepared by copolymerizing butadiene and acrylonitrile is oil-resistant (especially alkane oil) and good-aging-resistant synthetic rubber, the acrylonitrile content (%) in the nitrile rubber is five types, namely 42-46, 36-41, 31-35, 25-30, 18-24 and the like, the more the acrylonitrile content is, the better the oil resistance is, but the cold resistance is correspondingly reduced, and the nitrile rubber can be used in air at 120 ℃ or oil at 150 ℃ for a long time, in addition, the rubber has good water resistance, air tightness and excellent bonding performance, is widely used for preparing various oil-resistant rubber products, various oil-resistant gaskets, sleeves, flexible packages, flexible rubber tubes, printing and dyeing rubber rollers, cable rubber materials and the like, and becomes an essential elastic material in the industries of automobiles, aviation, petroleum, copying and the like.

The working principle is as follows: before the sealing device is used, firstly, a sealing element structure for the hydraulic cylinder with good sealing effect is moved to a proper position, the outer cylinder 1 and the inner cylinder 2 are embedded and installed, then, the inner cylinder 2 is connected with the piston rod through the through hole 5, the ports at the left side and the right side of the inner cylinder 2 are embedded and sealed through the first sealing component 4 and the second sealing component 7, the periphery of the second sealing component 7 is fixedly connected with the ports of the hydraulic cylinder through the clamping grooves 8, the vibration generated in the operation process of the hydraulic cylinder is fully relieved through the spring buffer component 6 above the second sealing component 7, when the piston rod of the inner cylinder 2 needs to be lubricated, the cylinder body 31 is fixed with the outer cylinder 1 through the fixing component 32 by arranging the lubricating device 3 at the rear end of the outer cylinder 1, the injection pipe 35 at the left end of the cylinder body 31 is penetrated with the inner cylinder 2, then, a proper amount of lubricating liquid is injected into the cylinder body 31 through the, then transversely press the push handle 33, the push handle 33 is stressed to extrude the spring rod 36, the spring rod 36 is matched with the partition plate 37 to compress so that the press plate 38 moves leftwards to extrude the spongy cushion 39, the spongy cushion 39 is stressed to compress to extrude lubricating oil at the inner side to flow into the inner cylinder 2 through the injection pipe 35 to lubricate the piston rod, and after lubrication is finished, the push handle 33 is loosened to sequentially reset the components, so that the beneficial effects of periodically lubricating the piston rod in the inner cylinder, eliminating the friction force generated by the sliding of the piston rod and the inner cylinder and avoiding the oil leakage of the hydraulic cylinder are achieved.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described, and the standard parts used in the present invention are all available on the market, the special-shaped parts can be customized according to the description and the accompanying drawings, the specific connection mode of each part adopts the conventional means of bolt and rivet, welding and the like mature in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described herein.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a sealed effectual sealing member structure for pneumatic cylinder, includes urceolus (1), its characterized in that still includes:

a lubricating device (3) for lubricating the rod member penetrating the sealing member;

the spring buffer piece (6) is used for relieving the shaking force generated during the installation and operation of the equipment;

wherein, the spring buffer piece (6) is spirally wound around the left side of the inner cylinder (2).

2. The sealing element structure for the hydraulic cylinder with good sealing effect according to claim 1, characterized in that: inner tube (2) are inlayed to urceolus (1) inboard, urceolus (1) rear end top and lubricating arrangement (3) bolt fastening, the vertical grafting in inner tube (2) top has first seal assembly (4), first seal assembly (4) middle part is provided with through-hole (5), inner tube (2) bottom outside is encircleed and is distributed and have spring bolster (6), spring bolster (6) bottom bonds and has second seal assembly (7), draw-in groove (8) have been seted up all around to second seal assembly (7) bottom.

3. The sealing element structure for the hydraulic cylinder with good sealing effect according to claim 1, characterized in that: the lubricating device (3) comprises a cylinder body (31), a fixing piece (32), a push handle (33), an injection plug (34), an injection tube (35), a spring rod (36), a clapboard (37), a pressing plate (38) and a spongy cushion (39), the upper end and the lower end of the left side of the cylinder body (31) are welded with fixing pieces (32), the middle part of the right side of the cylinder body (31) is inserted with a push handle (33), an injection plug (34) is embedded at the top of the right side of the cylinder body (31), an injection tube (35) is inserted in the middle of the left side of the cylinder body (31), the left side of the push handle (33) is elastically connected with a spring rod (36), the outer side of the spring rod (36) horizontally penetrates through a partition plate (37), a pressing plate (38) is welded at the left end of the spring rod (36), a spongy cushion (39) is arranged at the left side of the pressing plate (38), the upper end and the lower end of the left side of the cylinder body (31) are fixed with the outer cylinder (1) through a fixing piece (32) by bolts.

4. The sealing member structure for the hydraulic cylinder with good sealing effect according to claim 3, characterized in that: baffle (37) include filter plate (371), filter screen (372) and slot (373), both ends are inlayed about filter plate (371) and are had filter screen (372), slot (373) have been seted up at filter screen (372) middle part, filter screen (372) middle part is run through slot (373) and clamp plate (38) level.

5. The sealing member structure for the hydraulic cylinder with good sealing effect according to claim 3, characterized in that: the length of the injection tube (35) is 6cm, and the left end of the injection tube (35) is in a conical shape.

6. The sealing member structure for the hydraulic cylinder with good sealing effect according to claim 3, characterized in that: the pressing plate (38) is T-shaped, and a layer of protective cushion is laid on the left side of the pressing plate (38).

7. The sealing member structure for the hydraulic cylinder with good sealing effect according to claim 3, characterized in that: the spongy cushion (39) is square, and the thickness of the spongy cushion (39) is 5 cm.

8. The sealing member structure for the hydraulic cylinder with good sealing effect according to claim 4, characterized in that: the filter screen (372) is symmetrically arranged at the upper end and the lower end of the filter plate (371), and the diameter of the meshes of the filter screen (372) is 0.3 mm.