CN218407978U

CN218407978U - Electro-hydraulic hammer hydraulic valve core supporting structure

Info

Publication number: CN218407978U
Application number: CN202221798800.9U
Authority: CN
Inventors: 任文战; 许永明; 王登峰; 杨俊宏; 班明
Original assignee: Xuanhua Iron and Steel Group Co Ltd
Current assignee: Xuanhua Iron and Steel Group Co Ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2023-01-31
Anticipated expiration: 2032-07-13

Abstract

The utility model relates to an electro-hydraulic hammer hydraulic pressure case bearing structure belongs to metallurgical industry electro-hydraulic hammer hydraulic pressure technical field. The technical scheme is as follows: the servo valve comprises a fixed valve sleeve (1), an end cover shaft sleeve (2), a servo valve core (3), a valve pull rod (4) and a balance support ring (5), wherein the servo valve core (3) is provided with a center hole matched with the valve pull rod (4), the valve pull rod (4) is arranged in the center hole of the servo valve core (3), the fixed valve sleeve (1) is sleeved on the servo valve core (3), the two ends of the servo valve core (3) are respectively fixed with the end cover shaft sleeve (2), and the balance support ring (5) is arranged between the end cover shaft sleeve (2) and the servo valve core (3). The beneficial effects of the utility model are that: the hydraulic valve core of the electro-hydraulic hammer power head has the advantages that the phenomena of locking, abrasion and scratching of the valve core can be reduced, the hydraulic valve core of the electro-hydraulic hammer power head is stable and reliable in work, the adaptability is high, the on-line service life of the hydraulic valve core is prolonged, the maintenance cost is reduced, and the working efficiency is improved.

Description

Electro-hydraulic hammer hydraulic valve core supporting structure

Technical Field

The utility model relates to an electro-hydraulic hammer hydraulic pressure case bearing structure belongs to metallurgical industry electro-hydraulic hammer hydraulic pressure technical field.

Background

The electro-hydraulic hammer is a control core element with a hydraulic reversing function for controlling the up-and-down linear reciprocating motion of a hydraulic cylinder of a power head of the electro-hydraulic hammer, and has two modes of horizontal installation and vertical installation, wherein the horizontal installation mode is more. Hydraulic valve core is at the reciprocal action in-process of level, because case assembly is bulky, the reason that self weight is big, under self gravity and hydraulic pressure's combined action, can cause the asymmetric wearing and tearing about producing between the moving part in the hydraulic valve core assembly and the static part, use after a period, this kind of friction can make the bottom contact surface excessively damage, wearing and tearing surface metal drops and the grinding mark when serious, even the case is locked and can not work, pull down and lead to the fact the fit clearance increase each other again after polishing, produce and leak in, wearing and tearing are more serious, and then cause the unable restoration of hydraulic valve core and use, whole hydraulic valve core is scrapped. Especially under the working environment that heavy load action of a large-tonnage electro-hydraulic hammer is frequent, the reliability of the hydraulic valve core structure becomes a key link for restricting the stable operation of the electro-hydraulic hammer.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an electro-hydraulic hammer hydraulic pressure case bearing structure can reduce case locking and wearing and tearing fish tail phenomenon, and extension hydraulic pressure case is online life, reduces cost of maintenance, improves work efficiency, solves the problem that exists among the background art.

The technical scheme of the utility model is that:

a supporting structure of a hydraulic valve core of an electro-hydraulic hammer comprises a fixed valve sleeve, an end cover shaft sleeve, a follow-up valve core, a valve pull rod and a balance supporting ring, wherein the follow-up valve core is provided with a central hole matched with the valve pull rod, the valve pull rod is arranged in the central hole of the follow-up valve core, the fixed valve sleeve is sleeved on the follow-up valve core, the end cover shaft sleeve is respectively fixed at two ends of the follow-up valve core, and the balance supporting ring is arranged between the end cover shaft sleeve and the follow-up valve core.

The central hole of the end cover shaft sleeve and the two ends of the follow-up valve core are of square structures matched with each other.

And a balance support ring between the end cover shaft sleeve and the follow-up valve core is a square split ring.

And a groove matched with the balance support ring is arranged in the circumferential direction of the central hole of the end cover shaft sleeve.

Adopt the utility model discloses, the valve pull rod action drives the motion case action, and the motion case is under the balanced support of both ends end cover axle sleeve and balanced support ring, and the central point that is in fixed valve barrel and both ends end cover axle sleeve centre bore puts to offset the unbalanced state that the lower part clearance that the follow-up valve core produced because gravity is little, the upper portion clearance is big, reached the axiality between fixed valve barrel, both ends end cover axle sleeve and the follow-up valve core.

The utility model has the advantages that: the problem of unbalanced upper and lower clearance between the hydraulic valve core moving part and the static part in the structure for horizontally installing the hydraulic valve core of the electro-hydraulic hammer power head is solved, and the adverse effect that the gravity of the follow-up valve core excessively quickly wears the fixed valve sleeve and the end cover shaft sleeves at two ends is reduced, so that a hydraulic valve core assembly of the electro-hydraulic hammer power head is stable and reliable in work, strong in adaptability, long in online service life of the hydraulic valve core, low in maintenance cost and high in working efficiency.

Drawings

FIG. 1 is an assembly view of the present invention;

FIG. 2 is a partially enlarged view of the present invention;

FIG. 3 is a schematic view of a valve pull rod;

FIG. 4 is a schematic view of an end cap bushing;

fig. 5 is a schematic view of a stationary valve sleeve;

FIG. 6 is a schematic view of a spool;

in the figure: the valve comprises a fixed valve sleeve 1, an end cover shaft sleeve 2, a follow-up valve core 3, a valve pull rod 4 and a balance support ring 5.

Detailed Description

The invention will be further described by way of example with reference to the accompanying drawings.

Referring to the attached drawings 1-6, the electrohydraulic hammer hydraulic valve core supporting structure comprises a fixed valve sleeve 1, an end cover shaft sleeve 2, a follow-up valve core 3, a valve pull rod 4 and a balance supporting ring 5, wherein the follow-up valve core 3 is provided with a central hole matched with the valve pull rod 4, the valve pull rod 4 is arranged in the central hole of the follow-up valve core 3, the fixed valve sleeve 1 is sleeved on the follow-up valve core 3, the two ends of the follow-up valve core 3 are respectively fixed with the end cover shaft sleeve 2, and the balance supporting ring 5 is arranged between the end cover shaft sleeve 2 and the follow-up valve core 3.

In this embodiment, referring to fig. 1 to 6, a center hole of the end cover shaft sleeve 2 and two ends of the spool 3 are of square structures matched with each other, a groove matched with the balance support ring 5 is formed in the circumferential direction of the center hole of the end cover shaft sleeve 2, the balance support ring 5 is a square opening ring made of polytetrafluoroethylene and is installed in the groove in the center hole of the end cover shaft sleeve 2, and the balance support ring 5 and the end cover shaft sleeves 2 at two ends jointly form a balance support structure of the spool 3.

The balance supporting principle of the follow-up valve core 3 of the moving part in the hydraulic valve core combination body is as follows:

the valve pull rod 4 acts to drive the follow-up valve core 3 to act, the follow-up valve core 3 is positioned at the central position of the central holes of the fixed valve sleeve 1 and the two end cover shaft sleeves 2 under the balanced support of the two end cover shaft sleeves 2 and the balanced support ring 5, so that the unbalanced state of small lower part gap and large upper part gap generated by the follow-up valve core 3 due to gravity is counteracted, and the coaxiality among the fixed valve sleeve 1, the two end cover shaft sleeves 2 and the follow-up valve core 3 is achieved.

Claims

1. The utility model provides an electro-hydraulic hammer hydraulic pressure case bearing structure which characterized in that: the servo valve comprises a fixed valve sleeve (1), an end cover shaft sleeve (2), a servo valve core (3), a valve pull rod (4) and a balance support ring (5), wherein the servo valve core (3) is provided with a center hole matched with the valve pull rod (4), the valve pull rod (4) is arranged in the center hole of the servo valve core (3), the fixed valve sleeve (1) is sleeved on the servo valve core (3), the two ends of the servo valve core (3) are respectively fixed with the end cover shaft sleeve (2), and the balance support ring (5) is arranged between the end cover shaft sleeve (2) and the servo valve core (3).

2. The hydraulic valve core supporting structure of an electro-hydraulic hammer according to claim 1, wherein: the center hole of the end cover shaft sleeve (2) and the two ends of the follow-up valve core (3) are of square structures matched with each other.

3. The hydraulic valve core supporting structure of an electro-hydraulic hammer according to claim 2, wherein: and a balance support ring (5) between the end cover shaft sleeve (2) and the follow-up valve core (3) is a square split ring.

4. The hydraulic valve core supporting structure of an electro-hydraulic hammer according to claim 3, wherein: and a groove matched with the balance support ring (5) is arranged in the circumferential direction of the center hole of the end cover shaft sleeve (2).