CN212002442U - Hydraulic breaking hammer with static pressure supporting structure - Google Patents
Hydraulic breaking hammer with static pressure supporting structure Download PDFInfo
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- CN212002442U CN212002442U CN202020233398.4U CN202020233398U CN212002442U CN 212002442 U CN212002442 U CN 212002442U CN 202020233398 U CN202020233398 U CN 202020233398U CN 212002442 U CN212002442 U CN 212002442U
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- static pressure
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- oil return
- pressure sleeve
- sleeve structure
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Abstract
The utility model relates to a hydraulic breaking hammer with a static pressure supporting structure, which comprises an upper cylinder body, a middle cylinder body, a lower cylinder body, an upper static pressure sleeve structure and a lower static pressure sleeve structure, wherein the upper static pressure sleeve structure is fixedly arranged between the upper cylinder body and the middle cylinder body, and the lower static pressure sleeve structure is fixedly arranged between the middle cylinder body and the lower cylinder body; the upper static pressure sleeve structure and the lower static pressure sleeve structure both comprise sleeve bodies, the inner wall of each sleeve body is of an annular structure, an even number of inward-sunk grooves are symmetrically arranged on the inner side wall of each sleeve body in the circumferential direction, hydraulic oil is injected into each groove through a throttling hole, a circle of sunk oil return grooves are arranged on the inner side walls of the sleeve bodies on the two sides of each groove in the circumferential direction, and the oil return grooves are communicated with the oil return holes for oil return; sealing mechanisms are arranged on the outer sides of the pair of oil return grooves on the inner side wall of the upper static pressure sleeve structure; and a sealing mechanism is arranged on the outer side of the oil return groove on the inner side wall of the lower static pressure sleeve structure, which is close to the lower cylinder body side. The utility model discloses can suspend the striking piston in the center of cylinder body to radial unbalance loading to the developments is resisted and is had the quick response ability.
Description
Technical Field
The utility model belongs to the technical field of hydraulic pressure is broken, especially, relate to a hydraulic crushing hammer with static pressure bearing structure.
Background
Along with the continuous development of economy, the construction amount of broken and removed projects is larger and larger, and in addition, because the requirements on safety and environmental protection are higher and higher, the limitation on blasting using explosives is stricter and stricter, the market changes the requirement on the hydraulic breaking hammer adopting mechanical breaking to the large-scale direction, and particularly, large and ultra-large hydraulic hammers are generally adopted in the mine exploitation industry.
At present, all reciprocating striking pistons in the hydraulic breaking hammer industry adopt a lubricating mode of a hydraulic oil film to prevent mechanical friction and strain between the striking pistons and a cylinder body. The technical scheme has poor oil film rigidity and poor anti-unbalance loading capability. In the construction operation process, if parts are abraded and improper in operation, the piston is easily subjected to radial load, and then a lubricating oil film between the piston and a cylinder body is damaged and struck, so that the conditions of mechanical friction, strain and the like are caused, the effective service life is greatly shortened, and the operation cost is improved.
The static pressure bearing structure that this patent adopted can play the effect to the center location in the cylinder body to the striking piston to suspend in the center of cylinder body, and resist to dynamic radial unbalance loading and have the quick response ability, and the oil film rigidity is high, can effectively improve the phenomenon emergence that mechanical friction pulled, improves the life of hydraulic pressure quartering hammer greatly, improves economic benefits.
Therefore, based on the problems, the hydraulic breaking hammer with the static pressure supporting structure, which can suspend the striking piston in the center of the cylinder and has the capability of resisting the dynamic radial unbalance loading and the rapid response capability, is of great practical significance.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide one kind and can suspend the striking piston in the center of cylinder body to radial unbalance loading to the developments is resisted and is had the hydraulic pressure quartering hammer that has static pressure bearing structure of quick response ability.
The utility model provides a its technical problem take following technical scheme to realize:
a hydraulic breaking hammer with a static pressure supporting structure comprises an upper cylinder body, a middle cylinder body, a lower cylinder body, an upper static pressure sleeve structure and a lower static pressure sleeve structure, wherein the upper static pressure sleeve structure is fixedly arranged between the upper cylinder body and the middle cylinder body, the lower static pressure sleeve structure is fixedly arranged between the middle cylinder body and the lower cylinder body, and a striking piston can be arranged in a through cavity formed by the upper cylinder body, the middle cylinder body and the lower cylinder body;
the upper static pressure sleeve structure and the lower static pressure sleeve structure both comprise sleeve bodies, the inner wall of each sleeve body is of an annular structure, an even number of concave grooves are symmetrically arranged on the inner side wall of each sleeve body in the circumferential direction, hydraulic oil is injected into each groove through a throttling hole, a circle of concave oil return grooves are arranged on the inner side wall of each sleeve body on the two sides of each groove in the circumferential direction, and the oil return grooves are communicated with the oil return holes for oil return;
sealing mechanisms are arranged on the outer sides of a pair of oil return grooves on the inner side wall of the upper static pressure sleeve structure, so that sealing between the upper static pressure sleeve structure and the striking piston is realized;
and a sealing mechanism is arranged on the outer side of the oil return groove on the inner side wall of the lower static pressure sleeve structure, which is close to the lower cylinder side, so that sealing between the lower static pressure sleeve structure and the striking piston is realized.
Furthermore, an air seal and a steckel seal are arranged on the outer side of an oil return groove, close to the upper cylinder body, on the inner side wall of the upper static pressure sleeve structure, and a steckel seal is arranged on the outer side of an oil return groove, close to the middle cylinder body, on the inner side wall of the upper static pressure sleeve structure.
Furthermore, the outer side of an oil return groove on the inner side wall of the lower static pressure sleeve structure, which is close to the lower cylinder side, is sequentially provided with a U-shaped ring and a dust seal.
Furthermore, the side wall of the middle cylinder body is communicated with a reversing valve through a middle cylinder signal port.
Furthermore, an energy accumulator is further arranged on the side wall of the middle cylinder body, and the energy accumulator is communicated with a lower cavity of the striking piston.
The utility model has the advantages that:
the utility model discloses an go up static pressure jacket structure and static pressure jacket structure down and installed in the upper and lower both ends of striking the piston, play the effect of supporting the centering to striking the piston to can come from outside yawing force to the operation in-process, radial unbalance loading plays the resistance, effectively improves anti friction ability, improves the life of hydraulic pressure quartering hammer.
Drawings
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and examples, but it should be understood that these drawings are designed for illustrative purposes only and thus are not intended to limit the scope of the present invention. Furthermore, unless otherwise indicated, the drawings are intended to be illustrative of the structural configurations described herein and are not necessarily drawn to scale.
Fig. 1 is a cross-sectional view of a hydraulic demolition hammer having a hydrostatic support structure according to an embodiment of the present invention;
fig. 2 is a structural cross-sectional view of an upper static pressure sleeve structure or a lower static pressure sleeve structure of a hydraulic breaking hammer with a static pressure supporting structure according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a middle cylinder portion of a hydraulic demolition hammer having a hydrostatic support structure according to an embodiment of the present invention;
Detailed Description
First, it should be noted that the specific structures, features, advantages, etc. of the present invention will be described in detail below by way of example, but all the descriptions are only for illustrative purpose and should not be construed as forming any limitation to the present invention. Furthermore, any single feature described or implicit in any embodiment or any single feature shown or implicit in any drawing may still be combined or subtracted between any of the features (or equivalents thereof) to obtain still further embodiments of the invention that may not be directly mentioned herein. In addition, for the sake of simplicity, the same or similar features may be indicated in only one place in the same drawing.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The present invention will be described in detail with reference to fig. 1 to 3.
Example 1
Fig. 1 is a cross-sectional view of a hydraulic demolition hammer having a hydrostatic support structure according to an embodiment of the present invention; fig. 2 is a structural cross-sectional view of an upper static pressure sleeve structure or a lower static pressure sleeve structure of a hydraulic breaking hammer with a static pressure supporting structure according to an embodiment of the present invention; fig. 3 is a cross-sectional view of a middle cylinder portion of a hydraulic demolition hammer having a hydrostatic support structure according to an embodiment of the present invention; as shown in fig. 1-3, the hydraulic breaking hammer with a static pressure support structure provided in this embodiment includes an upper cylinder 1, a middle cylinder 2, a lower cylinder 3, an upper static pressure sleeve structure 9, and a lower static pressure sleeve structure 10, where the upper static pressure sleeve structure 9 is fixedly disposed between the upper cylinder 1 and the middle cylinder 2, the lower static pressure sleeve structure 10 is fixedly disposed between the middle cylinder 2 and the lower cylinder 3, a striking piston 4 is mountable in a through cavity formed by the upper cylinder 1, the middle cylinder 2, and the lower cylinder 3, a striking end of the striking piston 4 can be connected to a drill rod 7, and a wear-resistant sleeve 8 is sleeved between the drill rod 7 and the lower cylinder 3;
the upper static pressure sleeve structure 9 and the lower static pressure sleeve structure 10 both comprise sleeve bodies 11, the inner walls of the sleeve bodies 11 are annular structures, an even number of concave grooves 12 are symmetrically arranged on the inner side walls of the sleeve bodies 11 in the circumferential direction, hydraulic oil is injected into each groove 12 through a throttling hole 13, a circle of concave oil return grooves 14 are arranged on the inner side walls of the sleeve bodies 11 on two sides of each groove 12 in the circumferential direction, and the oil return grooves 14 are communicated with the oil return holes for oil return;
the invention is characterized in that an upper static pressure sleeve structure 9 and a lower static pressure sleeve structure 10 are arranged at two ends of a striking piston, high-pressure oil is introduced to oil pad areas of grooves 12 through orifices 13, the oil pad areas are symmetrically arranged, the pressure oil in the oil pad areas generates preloading force on the outer diameter of the striking piston, the piston is forced to be in the center and is suspended in the center of a cylinder body, an oil inlet of each oil pad area is provided with an orifice, so that the pressure of the oil pad area and the oil film gap pressure have a certain pressure difference, and the pressure difference exists, when the striking piston receives a certain direction offset load force, the striking piston can deviate to the oil pad area on the stressed side, the pressure of the oil pad area on the pressed side can rapidly rise, the acting force of the pressure rise of the oil pad area on the pressed surface of the striking piston can rapidly rise, thereby effectively preventing the striking piston from further deviating from the center and ensuring that the center of the striking piston is always positioned in the center of the, the annular lubricating film between the striking piston and the cylinder body is sufficiently and uniformly, friction and strain cannot be caused, the service life of the hydraulic breaking hammer is effectively prolonged, and the hydraulic breaking hammer has good economic benefit.
Sealing mechanisms are arranged on the outer sides of the pair of oil return grooves on the inner side wall of the upper static pressure sleeve structure 9, so that sealing between the upper static pressure sleeve structure 9 and the striking piston 4 is realized;
and a sealing mechanism is arranged on the outer side of an oil return groove on the inner side wall of the lower static pressure sleeve structure 10, which is close to the lower cylinder body 3 side, so that the sealing between the lower static pressure sleeve structure 10 and the striking piston 4 is realized.
Specifically, in this embodiment, an air seal 901 and a stet seal 902 are disposed on the outer side of the oil return groove on the inner side wall of the upper static pressure jacket structure 9 close to the upper cylinder 1, and a stet seal 903 is disposed on the outer side of the oil return groove on the inner side wall of the upper static pressure jacket structure 9 close to the middle cylinder 2; and a U-shaped ring 1001 and a dust seal 1002 are sequentially arranged on the outer side of the oil return groove on the inner side wall of the lower static pressure sleeve structure 10, which is close to the lower cylinder body 3.
The side wall of the middle cylinder body 2 is communicated with a reversing valve 5 through a middle cylinder signal port 15.
In addition, an energy accumulator 6 is arranged on the side wall of the middle cylinder body 2, and the energy accumulator 6 is communicated with a lower cavity 16 of the striking piston.
For example, in this embodiment, the striking piston 4 rises to the top dead center of displacement under the action of hydraulic oil, outputs high-pressure signal oil, and pushes the reversing valve element to reverse, so that the upper chamber 17 and the lower chamber 16 of the striking piston are simultaneously communicated with the high-pressure oil, and the striking piston rapidly moves downward under the action of the action area of the upper chamber 17 larger than that of the lower chamber 16 and the pressure of nitrogen in the cylinder body, and the kinetic energy of the striking piston is transferred to the drill rod through collision with the drill rod, thereby realizing the breaking of hard objects. Due to the abrasion and operation reasons of all parts of the hydraulic breaking hammer in the working process, the collision contact point of the striking piston and the drill rod can deviate from the center, so that the striking piston can be acted by lateral unbalance loading force, the movement direction of the striking piston in the cylinder body deviates from the center of the cylinder body, the traditional hydraulic breaking hammer structure only has a dynamic pressure oil film, the influence of the unbalance loading force which is difficult to resist is influenced, and the phenomena of abrasion, pulling damage and the like between the striking piston and the cylinder body are caused.
It should be noted that, in the present invention, the striking piston 4 interacts with the reversing valve 5 to achieve the vertical striking effect of the striking piston 4, and the striking piston 4, the upper cylinder 1, the middle cylinder 2, the lower cylinder 3, and the reversing valve 5 are all common in the market, and belong to the prior art, and are not described herein again.
The above embodiments are described in detail, but the above description is only for the preferred embodiments of the present invention, and should not be construed as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (5)
1. A hydraulic demolition hammer having a hydrostatic support structure, characterized by: the hydraulic cylinder comprises an upper cylinder body, a middle cylinder body, a lower cylinder body, an upper static pressure sleeve structure and a lower static pressure sleeve structure, wherein the upper static pressure sleeve structure is fixedly arranged between the upper cylinder body and the middle cylinder body;
the upper static pressure sleeve structure and the lower static pressure sleeve structure both comprise sleeve bodies, the inner wall of each sleeve body is of an annular structure, an even number of concave grooves are symmetrically arranged on the inner side wall of each sleeve body in the circumferential direction, hydraulic oil is injected into each groove through a throttling hole, a circle of concave oil return grooves are arranged on the inner side wall of each sleeve body on the two sides of each groove in the circumferential direction, and the oil return grooves are communicated with the oil return holes for oil return;
sealing mechanisms are arranged on the outer sides of a pair of oil return grooves on the inner side wall of the upper static pressure sleeve structure, so that sealing between the upper static pressure sleeve structure and the striking piston is realized;
and a sealing mechanism is arranged on the outer side of the oil return groove on the inner side wall of the lower static pressure sleeve structure, which is close to the lower cylinder side, so that sealing between the lower static pressure sleeve structure and the striking piston is realized.
2. A hydraulic demolition hammer having a hydrostatic support structure as claimed in claim 1 wherein: go up the oil return groove outside that static pressure jacket structure inside wall is close to last cylinder side and be equipped with airtight and steckel, go up static pressure jacket structure inside wall and be close to the oil return groove outside of well cylinder side and be equipped with steckel.
3. A hydraulic demolition hammer with a hydrostatic support structure according to claim 1 or 2, characterized in that: and a U-shaped ring and a dustproof seal are sequentially arranged on the inner side wall of the lower static pressure sleeve structure and on the outer side of the oil return groove close to the lower cylinder side.
4. A hydraulic demolition hammer having a hydrostatic support structure as claimed in claim 1 wherein: and the side wall of the middle cylinder body is communicated with a reversing valve through a middle cylinder signal port.
5. A hydraulic demolition hammer having a hydrostatic support structure as claimed in claim 1 wherein: and the side wall of the middle cylinder body is also provided with an energy accumulator, and the energy accumulator is communicated with a lower cavity of the striking piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020233398.4U CN212002442U (en) | 2020-03-02 | 2020-03-02 | Hydraulic breaking hammer with static pressure supporting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020233398.4U CN212002442U (en) | 2020-03-02 | 2020-03-02 | Hydraulic breaking hammer with static pressure supporting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212002442U true CN212002442U (en) | 2020-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020233398.4U Active CN212002442U (en) | 2020-03-02 | 2020-03-02 | Hydraulic breaking hammer with static pressure supporting structure |
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| Country | Link |
|---|---|
| CN (1) | CN212002442U (en) |
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2020
- 2020-03-02 CN CN202020233398.4U patent/CN212002442U/en active Active
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