CN112460097A - Wear-resistant insulating oil cylinder - Google Patents

Abstract

The invention relates to a wear-resistant insulating oil cylinder, which comprises: cylinder liner, plunger, cylinder cap and shield, be formed with both ends open-ended in the cylinder liner and hold the chamber, the plunger is located and is held the intracavity, and the cylinder cap is connected with the one end opening cooperation of cylinder liner, and the shield is connected with the other end opening cooperation of cylinder liner, and the lateral wall of cylinder liner is equipped with the oil inlet, and the oil inlet with hold the chamber and be linked together, cylinder liner, plunger, cylinder cap and shield all adopt alumina ceramics. High pressure oil gets into from the oil inlet and holds the intracavity, under the effect of liquid pressure, the plunger outwards slides along the inner wall of cylinder liner, during the return stroke, hydraulic pressure release, the plunger relies on gravity or external force return, because the cylinder liner, the plunger, cylinder cap and shield have all adopted alumina ceramics, and alumina material has insulating nature strong, characteristics such as wearability height, consequently make the wearability of hydro-cylinder obtain very big improvement, avoid leading to the hydro-cylinder to damage because of long-time wearing and tearing, the life of hydro-cylinder has been improved.

Description

Wear-resistant insulating oil cylinder

Technical Field

The invention relates to the technical field of insulating oil cylinders, in particular to a wear-resistant insulating oil cylinder.

Background

Hydraulic rams are the actuators in a hydraulic system that convert hydraulic energy into mechanical energy for linear motion. At present, most of hydraulic oil cylinders which are commonly used for providing transmission motion or supporting force in the field of mechanical engineering are metal oil cylinders, however, when live-line work is carried out, particularly under high voltage, the metal oil cylinders inevitably generate an arc discharge phenomenon to endanger the work safety, so that an insulating oil cylinder which is suitable for being used in the field of live-line work engineering needs to be developed aiming at the situation of the live-line work.

The cylinder body of the insulating oil cylinder which can be seen at present is made of epoxy glass fiber, the material has defects in oil resistance and wear resistance, the problems of hydraulic oil leakage and the like caused by abrasion of the oil cylinder can occur after long-term use, and the service life of the oil cylinder is shortened.

Disclosure of Invention

Therefore, the wear-resistant insulating oil cylinder is needed to solve the problems, the wear resistance of the wear-resistant insulating oil cylinder can be effectively improved, and the service life of the oil cylinder is prolonged.

A wear-resistant insulating oil cylinder comprises: cylinder liner, plunger, cylinder cap and shield, it has both ends open-ended to hold the chamber to form in the cylinder liner, the plunger is located hold the intracavity, the cylinder cap with the one end opening cooperation of cylinder liner is connected, the shield with the other end opening cooperation of cylinder liner is connected, the lateral wall of cylinder liner is equipped with the oil inlet, just the oil inlet with it is linked together to hold the chamber, the cylinder liner the plunger the cylinder cap and the shield all adopts alumina ceramics.

When the wear-resistant insulating oil cylinder is used, the cylinder cover is connected with one end of the cylinder sleeve, and the plunger is inserted into the cylinder sleeve, so that the cylinder cover, the cylinder sleeve and the plunger form a closed space. Because the cylinder sleeve, the plunger, the cylinder cover and the dust cover all adopt alumina ceramics, and alumina materials have the characteristics of strong insulativity, high wear resistance and the like, the wear resistance of the oil cylinder is greatly improved, the damage of the oil cylinder caused by long-time wear is avoided, and the service life of the oil cylinder is prolonged.

The technical solution is further explained below:

in one embodiment, the alumina ceramic comprises zirconium oxide and alumina, and the alumina content is greater than 99%.

In one embodiment, the plunger is slidably disposed in the cylinder sleeve, and the plunger divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is close to the cylinder cover, and the second accommodating cavity is close to the dust cover.

In one embodiment, two oil inlets are formed in the side wall of the cylinder sleeve, and both the two oil inlets are communicated with the first accommodating cavity.

In one embodiment, the cylinder cover further comprises a first fastening piece, a flange is arranged on the outer wall of one end of the cylinder sleeve, a first connecting hole is formed in the periphery of the cylinder cover, and the flange is connected with the first connecting hole through the first fastening piece.

In one embodiment, the cylinder sleeve further comprises a second fastening piece, second connecting holes are formed in the periphery of the dust cover and the wall surface of the other end of the cylinder sleeve, and the second fastening piece is inserted into the second connecting holes and used for connecting the dust cover and the cylinder sleeve.

In one embodiment, the cylinder cover further comprises a sealing ring, a groove is formed in the side face, opposite to the cylinder sleeve, of the cylinder cover, and the sealing ring is arranged in the groove.

In one embodiment, the dustproof cover further comprises a gasket, and the gasket is arranged between the dustproof cover and the cylinder sleeve.

In one embodiment, the inner wall of the cylinder sleeve is smooth, and the outer wall of the cylinder sleeve is of an umbrella skirt structure.

In one embodiment, the hydraulic cylinder further comprises a first joint and a second joint, wherein the first joint is connected with the outer side face of the cylinder cover, and the second joint is connected with the tail end of the plunger.

Drawings

FIG. 1 is a schematic structural diagram of a wear-resistant insulating cylinder in an embodiment;

fig. 2 is a schematic structural diagram of a cylinder cover in the wear-resistant insulating cylinder in fig. 1.

Description of reference numerals:

10. a cylinder liner; 110. an accommodating chamber; 111. a first accommodating chamber; 112. a second accommodating chamber; 120. an oil inlet; 130. a flange; 20. a plunger; 30. a cylinder cover; 310. a first connection hole; 320. a groove; 40. a dust cover; 50. a first fastener; 60. a second fastener; 70. a seal ring; 80. a first connector; 90. A second connector.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention can be embodied in many different forms than those herein described and one skilled in the art can make similar modifications without departing from the spirit of the invention and it is therefore not limited to the specific embodiments disclosed below.

Referring to fig. 1, an embodiment provides a wear-resistant insulating cylinder, including: cylinder liner 10, plunger 20, cylinder cap 30 and shield 40, be formed with both ends open-ended in the cylinder liner 10 and hold chamber 110, plunger 20 is located and is held in the chamber 110, cylinder cap 30 is connected with the one end opening cooperation of cylinder liner 10, shield 40 is connected with the other end opening cooperation of cylinder liner 10, the lateral wall of cylinder liner 10 is equipped with oil inlet 120, and oil inlet 120 with hold the chamber 110 and be linked together, cylinder liner 10, plunger 20, cylinder cap 30 and shield 40 have all adopted the alumina ceramics.

When the wear-resistant insulating oil cylinder is used, the cylinder cover 30 is connected with one end of the cylinder sleeve 10, and the plunger 20 is inserted into the cylinder sleeve 10, so that the cylinder cover 30, the cylinder sleeve 10 and the plunger 20 form a closed space, when high-pressure oil enters the accommodating cavity 110 from the oil inlet 120, the plunger 20 slides outwards along the inner wall of the cylinder sleeve 10 under the action of liquid pressure, and during return stroke, hydraulic pressure is released, and the plunger 20 returns by means of gravity or external force. Because the cylinder sleeve 10, the plunger 20, the cylinder cover 30 and the dust cover 40 are made of alumina ceramics, and the alumina materials have the characteristics of strong insulativity, high wear resistance and the like, the wear resistance of the oil cylinder is greatly improved, the oil cylinder is prevented from being damaged due to long-time wear, and the service life of the oil cylinder is prolonged.

In an embodiment based on the above embodiments, the alumina ceramic includes zirconia and alumina, and the alumina content is greater than 99%. Because the conventional alumina ceramic material has large brittleness, the plastic deformation of the conventional alumina ceramic material is small, cracks are easy to generate, and in order to overcome the defects of the alumina ceramic, the zirconia oxide is added into the alumina ceramic raw material, so that the processed alumina ceramic has good superplasticity, the alumina ceramic can be processed and applied to the oil cylinder, and the insulating oil cylinder works in an electrified operation scene.

On the basis of the above embodiment, in an embodiment, the plunger 20 is slidably disposed in the cylinder liner 10, and the plunger 20 divides the accommodating cavity 110 into a first accommodating cavity 111 and a second accommodating cavity 112, the first accommodating cavity 111 is close to the cylinder head 30, and the second accommodating cavity 112 is close to the dust cover 40.

In this embodiment, the plunger 20 is in a "T" shaped structure, so that the plunger 20 can be specifically divided into a plug head and a post rod, wherein the plug head is one end of the plunger 20 close to the first accommodating cavity 111, and the size of the plug head is smaller than the inner diameter of the cylinder sleeve 10, specifically, the diameter of the plug head is not suitable to be greatly different from the inner diameter of the cylinder sleeve 10, and only a fit clearance is required to be kept between the plug head and the cylinder sleeve 10, so that the plug head can slide in the cylinder sleeve 10; the other end of the plunger 20, namely, the end located in the second accommodating cavity 112, is the pillar rod, and the size of the pillar rod is also smaller than the inner diameter of the cylinder sleeve 10, specifically, the diameter of the pillar rod is also smaller than the diameter of the plug head, so that the plunger 20 normally slides in the cylinder sleeve 10, and the overall weight of the wear-resistant insulating oil cylinder is reduced.

Further, the dust cover 40 is provided with a through hole (not shown), so that the end of the plunger 20 can pass through the through hole to slide the plunger 20 in the cylinder casing 10. Specifically, the size of through-hole is greater than the size of post, and specifically, the diameter of through-hole should not be great with the diameter phase difference of post, if differ too greatly for in external dust gets into the second from clearance between them and holds chamber 112 easily, influence wear-resisting insulating cylinder's insulating properties, therefore the sliding relation between through-hole and the post is the same with the sliding relation between chock plug and the cylinder liner, all is clearance fit slip.

Alternatively, in another embodiment, the entire plunger 20 is the same size, i.e., the diameter of the plug and the post are the same, such that the plunger 20 is a cylindrical structure. Thus, only the first receiving chamber 111 is provided in the cylinder liner 10.

On the basis of the above embodiment, in an embodiment, two oil inlets 120 are provided on the side wall of the cylinder liner 10, and both the two oil inlets 120 are communicated with the first accommodating cavity 111. In this way, when the hydraulic oil enters the first accommodating chamber 111 from the oil inlet 120, the hydraulic oil pushes the plunger 20 to move in the cylinder liner 10 under the action of the hydraulic pressure, so as to push the mechanical component connected to the plunger 20.

Optionally, in order to ensure that the hydraulic oil does not enter the second accommodating cavity 112 from a gap between the inner walls of the plunger 20 and the cylinder sleeve 10 after entering the first accommodating cavity 111 from the oil inlet 120, the outer wall of the plunger 20 is provided with a sealing groove and a sealing assembly, and the sealing assembly is sleeved on the sealing groove, so that the hydraulic oil in the first accommodating cavity 111 can be effectively prevented from entering the second accommodating cavity 112.

On the basis of the above embodiment, in an embodiment, the wear-resistant insulating oil cylinder further includes a first fastening member 50, a flange 130 is disposed on an outer wall of one end of the cylinder sleeve 10, a first connection hole 310 is disposed around the cylinder cover 30, and the flange 130 is connected to the first connection hole 310 through the first fastening member 50. The first connecting holes 310 arranged around the cylinder cover 30 correspond to the position of the flange 130, so that the cylinder cover 30 and the cylinder liner 10 can be connected more accurately. In addition, because the cylinder sleeve 10 is provided with the flange 130, on the premise of ensuring that the cylinder sleeve 10 can be stably connected with the cylinder cover 30, redundant space can be reserved on the cylinder cover 30 for arranging other components.

Alternatively, the flange 130 is not provided on the outer wall of the cylinder liner 10, and the first fastening member 50 is directly passed through the first connection hole 310 and connected to the wall surface of the cylinder liner 10. Therefore, the cylinder cover 30 can be quickly connected with the cylinder sleeve 10, and the occupied space of the wear-resistant insulating oil cylinder is reduced.

Alternatively, the first fastening member 50 may be a bolt assembly or a screw assembly, and particularly, the kind of the first fastening member 50 is not particularly restricted.

Further, because the cylinder liner 10 is connected with the cylinder cover 30 through the first fastening piece 50, the cylinder cover 30 can be detachably connected to the cylinder liner 10, so that the condition in the accommodating cavity 110 in the cylinder liner 10 can be conveniently checked, and meanwhile, the accommodating cavity 110 is conveniently cleaned.

Optionally, the cylinder head 30 is integrally formed at one end of the cylinder liner 10. For example, the cylinder cover 30 is formed at one end of the cylinder sleeve 10 through dry pressing or slip casting, so that the cylinder cover 30 is fixedly connected with the cylinder sleeve 10, and the cylinder sleeve 10 and the cylinder cover 30 do not need to be connected through additional parts, so that the wear-resistant insulating oil cylinder is simpler to operate in the using process.

Further, the wear-resistant insulating oil cylinder further comprises a second fastening piece 60, second connecting holes (not shown in the figure) are formed in the periphery of the dust cover 40 and the wall surface of the other end of the cylinder sleeve 10, and the second fastening piece 60 is inserted into the second connecting holes and used for connecting the dust cover 40 and the cylinder sleeve 10. So, set up can effectively prevent after the shield 40 that the dust from getting into in the cylinder liner 10, avoid holding in the wear-resisting insulating cylinder chamber 110 and have the dirt, influence the insulating properties of wear-resisting insulating cylinder.

Alternatively, the second fastening member 60 may also be a bolt assembly or a screw assembly, and particularly, the kind of the second fastening member 60 is not particularly limited.

Optionally, a flange 130 is also provided on the outer wall of the other end of the cylinder casing 10, so that the second fastening member 60 can pass through the second connecting hole to connect the cylinder casing 10 with the dust cover 40.

Optionally, the cylinder cover 30 and/or the dust cover 40 are provided with a buckle or a thread, and the cylinder sleeve 10 is also provided with a corresponding buckle and a thread at a corresponding connection position of the cylinder cover 30 and the dust cover 40, so that the cylinder cover 30 and/or the dust cover 40 are mounted at two ends of the cylinder sleeve 10 by means of the buckle or the thread connection.

Further, in the embodiment, the cylinder liner 10, the cylinder cover 30 and the dust cover 40 are detachably connected, and when some parts are damaged, the damaged parts can be replaced independently, so that the cost is saved, and resources are reasonably utilized.

Referring to fig. 2 and fig. 1, on the basis of the above embodiments, in an embodiment, the wear-resistant insulating oil cylinder further includes a seal ring 70, a groove 320 is formed on a side surface of the cylinder cover 30 opposite to the cylinder liner 10, and the seal ring 70 is disposed in the groove 320. Therefore, the sealing ring 70 is arranged at the connecting position of the cylinder cover 30 and the cylinder sleeve 10, so that the cylinder cover 30 and the cylinder sleeve 10 have detachable functions and liquid leakage cannot occur, and the reliability of the wear-resistant insulating oil cylinder is further ensured; specifically, under the action of the sealing ring 70, when hydraulic oil enters the accommodating cavity 110 from the oil inlet 120, the hydraulic oil cannot leak from a gap where the cylinder cover 30 and the cylinder sleeve 10 are connected, so that the whole wear-resistant insulating cylinder is kept clean while the sealing performance of the accommodating cavity 110 is ensured.

Alternatively, the number of the grooves 320 and the number of the seal rings 70 are not particularly limited, and it is only necessary that the number of the grooves 320 and the number of the seal rings 70 are the same.

Specifically, in the present embodiment, two grooves 320 are provided on the side of the cylinder head 30 opposite to the cylinder liner 10, and thus two sealing rings 70 are provided, so that one sealing ring 70 is provided in each groove 320.

In order to ensure the insulation property of the wear-resistant insulating cylinder, optionally, the sealing ring 70 is made of an insulating material, such as rubber, specifically, the insulating material used for the sealing ring is not particularly limited, and only needs to ensure higher wear resistance.

On the basis of the above embodiments, in an embodiment, in order to increase the sealing performance between the dust cap 40 and the cylinder sleeve 10, the wear-resistant insulating cylinder further includes a gasket (not shown in the figure), and the gasket is disposed between the dust cap 40 and the cylinder sleeve 10. Thus, under the action of the gasket, the sealing performance between the dust cap 40 and the cylinder liner 10 can be increased, so that dust and impurities in the outside are difficult to enter the accommodating cavity 110.

On the basis of the above embodiments, in an embodiment, the inner wall of the cylinder liner 10 is smooth, and the outer wall of the cylinder liner 10 is in a shed structure. Thus, the smooth inner wall reduces the friction between the plunger 20 and the cylinder liner 10, so that the plunger 20 is less resistant to sliding.

Specifically, the outer wall of cylinder liner 10 is umbrella skirt column structure, and the surface of cylinder liner 10 is the curved surface and is the wave structure along the height direction of cylinder liner 10 promptly, and the main effect of umbrella skirt column structure is to increase creepage distance, can reduce because of the uneven phenomenon of distributing of the surface current along cylinder liner 10 that leads to of dust distribution to improve insulating effect.

Alternatively, the outer wall of the cylinder liner 10 may also be a flat smooth surface, such that the cylinder liner 10 is a cylindrical sleeve structure with openings at both ends.

Optionally, in order to reduce the friction between the plunger 20 and the inner wall of the cylinder casing 10, the surface of the plunger 20 and the inner wall of the cylinder casing 10 are subjected to a grinding and polishing treatment, so that the contact gap between the plunger 20 and the inner wall of the cylinder casing 10 is less than 1 micron.

On the basis of the above embodiments, in an embodiment, the wear-resistant insulating oil cylinder further includes a first joint 80 and a second joint 90, the first joint 80 is connected with the outer side surface of the cylinder head 30, and the second joint 90 is connected with the end of the plunger 20. In this way, the first joint 80 and the second joint 90 can be conveniently connected with other tools, and the other tools can be pushed to operate through the wear-resistant insulating oil cylinder.

The wear-resistant insulating oil cylinder adopts the alumina ceramic, so that the mechanical strength and the wear resistance of the oil cylinder are improved on the premise of ensuring that the oil cylinder has good insulating property, the wear-resistant insulating oil cylinder can be well applied to electrified operation occasions, the life safety of live working personnel is ensured, and the service life of the oil cylinder is prolonged.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so indicated must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered as limiting the invention.

Furthermore, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected through the interior of two elements or through the interaction of two elements unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "below," and "beneath" a second feature may be directly or obliquely under the first feature or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a wear-resisting insulating hydro-cylinder which characterized in that includes: cylinder liner, plunger, cylinder cap and shield, be formed with both ends open-ended in the cylinder liner and hold the chamber, the plunger is located hold the intracavity, the cylinder cap with the one end opening cooperation of cylinder liner is connected, the shield with the other end opening cooperation of cylinder liner is connected, the lateral wall of cylinder liner is equipped with the oil inlet, just the oil inlet with it is linked together to hold the chamber, the cylinder liner the plunger the cylinder cap and the shield all adopts alumina ceramics.

2. The wear-resistant insulating cylinder according to claim 1, wherein the alumina ceramic comprises zirconium oxide and alumina, and the alumina content is greater than 99%.

3. The wear-resistant insulating oil cylinder according to claim 1, wherein the plunger is slidably disposed in the cylinder sleeve, and divides the accommodating cavity into a first accommodating cavity and a second accommodating cavity, the first accommodating cavity is close to the cylinder cover, and the second accommodating cavity is close to the dust cover.

4. The wear-resistant insulating oil cylinder according to claim 3, wherein two oil inlets are formed in the side wall of the cylinder sleeve, and the two oil inlets are communicated with the first accommodating cavity.

5. The wear-resistant insulating oil cylinder according to claim 1, further comprising a first fastener, wherein a flange is arranged on the outer wall of one end of the cylinder sleeve, a first connecting hole is formed in the periphery of the cylinder cover, and the flange is connected with the first connecting hole through the first fastener.

6. The wear-resistant insulating oil cylinder according to claim 1, further comprising a second fastening member, wherein second connecting holes are formed in the periphery of the dust cover and the wall surface of the other end of the cylinder sleeve, and the second fastening member is inserted into the second connecting hole and used for connecting the dust cover and the cylinder sleeve.

7. The wear-resistant insulating oil cylinder according to claim 1, further comprising a seal ring, wherein a groove is formed in a side surface of the cylinder cover opposite to the cylinder sleeve, and the seal ring is arranged in the groove.

8. The wear-resistant insulating oil cylinder according to claim 1, further comprising a gasket, wherein the gasket is arranged between the dust cover and the cylinder sleeve.

9. The wear-resistant insulating oil cylinder according to any one of claims 1 to 8, wherein the inner wall of the cylinder sleeve is smooth, and the outer wall of the cylinder sleeve is of an umbrella skirt structure.

10. The wear-resistant insulating oil cylinder according to any one of claims 1 to 8, characterized by further comprising a first joint and a second joint, wherein the first joint is connected with the outer side surface of the cylinder cover, and the second joint is connected with the tail end of the plunger.

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