CN211852359U

CN211852359U - Novel excavator oil cylinder guide sleeve sealing element

Info

Publication number: CN211852359U
Application number: CN201922307175.8U
Authority: CN
Inventors: 聂晓艺
Original assignee: Shanghai Weiwan Sealing Technology Co Ltd
Current assignee: Shanghai Weiwan Sealing Technology Co Ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-11-03
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a novel excavator cylinder uide bushing sealing member, characterized by: comprises a sealing ring and a packing ring; the sealing ring comprises a main body and two first lips which are formed at the same end of the main body and form a Y-shaped structure with the main body, and a second lip is formed on the outer ring of the main body; the packing ring is clamped in the Y-shaped opening and supports the two first lips. The utility model discloses can prevent that water from entering into oil blanket system to and prevent the problem that the hydraulic oil in the oil blanket system leaked.

Description

Novel excavator oil cylinder guide sleeve sealing element

Technical Field

The utility model relates to a sealing member, more specifically relate to a novel excavator hydro-cylinder uide bushing sealing member.

Background

In view of the development of construction machines in recent years, the development of excavators is relatively fast, and the excavator has become one of the most important construction machines in construction. The outer region of the main sealing lip of the oil cylinder guide sleeve groove is easy to corrode in use and after-sale maintenance, after the groove bottom of the oil cylinder main sealing groove is corroded, maintenance personnel generally difficultly treat the corroded groove completely, some maintenance workers even do not clean the groove, the sealing ring is directly replaced, and the service life and the sealing effect of the sealing ring are obviously affected. The root cause of uide bushing corrosion is that there are debris such as water, silt to get into hydraulic system from the dust ring, and the dust ring structure on the existing market has optimization improvement, but digs the applied operating mode of machine too abominable, and the condition of uide bushing corrosion still often takes place, and the uide bushing corrosion, main seal reveal easily, cause to dig the machine shut down.

Fig. 1 shows a sealing system of a guide sleeve of a digging machine, wherein a dust ring 10, a main seal 20 and a buffer seal 30 are sequentially arranged on the inner wall of the guide sleeve 40 from top to bottom. When the piston rod stretches out, the dust ring scrapes off dust, silt and the like on the piston rod and prevents water and the like from entering the hydraulic system, and the main seal and the buffer seal below are used for sealing high-pressure hydraulic oil of the system. At present, sealing manufacturers optimize the structure of the dustproof sealing element, but the problem that the dustproof sealing element is singly used is difficult to fundamentally solve.

As shown in figure 1, the common main seal in the market is a common Y-ring structure, an anti-extrusion retainer ring is arranged behind the common main seal, and the common structure can only seal oil and cannot play a role in water prevention; the outer diameter direction of the groove, particularly the rusted groove, has large roughness and poor sealing effect, and is easy to cause leakage.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to prior art not enough, the utility model provides a novel excavator cylinder uide bushing sealing member can prevent that water from entering into oil blanket system to and prevent the problem that the hydraulic oil in the oil blanket system leaked.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a novel excavator hydro-cylinder uide bushing sealing member, characterized by: comprises a sealing ring and a packing ring;

the sealing ring comprises a main body and two first lips which are formed at the same end of the main body and form a Y-shaped structure with the main body, and a second lip is formed on the outer ring of the main body;

the packing ring is clamped in the Y-shaped opening and supports the two first lips. .

Preferably, the second lip has two pieces.

Preferably, the slope of the second lip towards one side of the first lip is smaller than the slope of the second lip away from one side of the first lip.

Preferably, the packing ring is of an X-shaped structure, and a clamping wall for clamping the packing ring of the X-shaped structure is arranged on the inner wall of the Y-shaped opening.

Preferably, the packing ring is a nitrile rubber ring, and the sealing ring is a polyurethane ring.

The utility model has the advantages that:

1. the second lip is arranged and can be tightly attached to the outer ring wall of the groove, so that hydraulic oil is prevented from leaking from the outer ring of the groove;

2. the Y opening can be filled by the aid of the tightening ring, so that the two first lips are stably supported, and can be stably attached to the piston rod and the wall of the groove respectively, and a stable waterproof effect is achieved; meanwhile, the size of the piston rod and the guide sleeve in the after-sale market is not matched tightly, and the packing ring can provide extra extrusion and packing to improve the sealing effect.

Drawings

FIG. 1 is a schematic view of a novel excavator cylinder guide sleeve sealing member provided in the present embodiment;

fig. 2 is a schematic view of a sealing structure between a cylinder guide sleeve and a piston rod in the prior art.

Detailed Description

The sealing member of the oil cylinder guide sleeve of the excavator of the present invention is further described with reference to fig. 1.

The utility model provides a novel excavator hydro-cylinder uide bushing sealing member, characterized by: comprises a polyurethane sealing ring 11 and a nitrile rubber packing ring 12.

The seal ring 11 includes a main body 112 and two first lips 111 formed at the same end of the main body 112 and forming a Y-shaped structure with the main body 112, a Y-shaped opening is formed between the two first lips 111 and the main body 112, and a second lip 1121 is formed on an outer ring of the main body 112;

the packing ring 12 is engaged in the Y-shaped opening and supports the two first lips 111.

With the structure, when the structure is assembled, the second lip 1121 can be tightly attached to the outer ring wall of the groove, so that hydraulic oil is prevented from leaking from the outer ring of the groove; the packing ring 12 can fill the Y opening and support and extrude the two first lips 111, so that the two first lips 111 can be stably attached to the piston rod and the wall of the groove respectively to achieve a stable waterproof effect; meanwhile, the size fit between the after-market piston rod and the guide sleeve is not very tight, and the packing ring 12 can provide additional extrusion and packing to improve the sealing effect.

The embodiment is further configured as follows: the second lip 1121 has two pieces. The two second lips 1121 can improve the stability of the fitting with the outer ring wall of the groove, so as to further improve the sealing effect.

The embodiment is further configured as follows: the slope a of the second lip 1121 toward the first lip 111 side is smaller than the slope b away from the first lip 111 side. This arrangement enables an optimum sealing effect to be achieved when the piston rod is displaced and pressed against the main seal 1.

The embodiment is further configured as follows: the packing ring 12 is of an X-shaped structure, and a clamping wall 1111 for clamping the packing ring 12 of the X-shaped structure is arranged on the inner wall of the Y-shaped opening. The structure can improve the matching stability of the main body 112 and the packing ring 12, and avoid the problem that the packing ring 12 is separated from the Y port due to the impact force in the working process; and on the other hand, the X-shaped structure has a better deformation buffering effect.

Unless otherwise specified, in the present invention, if the terms "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, rather than to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing orientation or positional relationship in the present invention are used for illustrative purposes only, and should not be construed as limiting the present patent, specific meanings of the above terms can be understood by those of ordinary skill in the art in light of the specific circumstances in conjunction with the accompanying drawings.

Unless expressly stated or limited otherwise, the terms "disposed," "connected," and "connected" are used broadly and encompass both fixed and removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a novel excavator hydro-cylinder uide bushing sealing member, characterized by: comprises a sealing ring and a packing ring;

the packing ring is clamped in the Y-shaped opening and supports the two first lips.

2. The new excavator cylinder guide sleeve seal as claimed in claim 1, characterized in that: the second lip has two pieces.

3. The new excavator cylinder guide sleeve seal as claimed in claim 1, characterized in that: the slope of the second lip towards one side of the first lip is smaller than the slope of the second lip back to one side of the first lip.

4. The new excavator cylinder guide sleeve seal as claimed in claim 1, characterized in that: the packing ring is of an X-shaped structure, and a clamping wall for clamping the packing ring of the X-shaped structure is arranged on the inner wall of the Y-shaped opening.

5. The new excavator cylinder guide sleeve seal as claimed in claim 1, characterized in that: the packing ring is a nitrile rubber ring, and the sealing ring is a polyurethane ring.