CN214578837U

CN214578837U - Power main shaft sealing structure of pipe-jacking tunneling machine

Info

Publication number: CN214578837U
Application number: CN202120644015.7U
Authority: CN
Inventors: 吕庆洲; 彭帅; 唐素文
Original assignee: Anhui Tangxing Machinery Equipment Co Ltd
Current assignee: Anhui Tangxing Equipment Technology Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-11-02
Anticipated expiration: 2031-03-30

Abstract

The utility model discloses a power main shaft sealing structure of a pipe-jacking tunneling machine, which comprises a power box body and a power main shaft, wherein the power main shaft is arranged on the power box body through a supporting bearing, a mud sealing sleeve and a cutter head taper sleeve are sleeved on the power main shaft, the mud sealing sleeve is arranged on the power box body through a plurality of groups of second connecting bolts, a combined sealing element is arranged at the inner side of the mud sealing sleeve, the inner ring of the combined sealing element is connected with the power main shaft in a sealing way, one end of the cutter head taper sleeve is connected with the mud sealing sleeve, the other end of the cutter head taper sleeve is provided with a front plugging plate, the front plugging plate is arranged at the end part of the power main shaft through a plurality of groups of first connecting bolts, the utility model adopts the design of a multi-pass grading targeted sealing structure and a pressure active slag discharging sealing structure, achieves the excellent sealing effect, fully exerts the characteristic difference between the sealing elements to carry out targeted sealing, and also actively discharges slag through pressure, the working pressure of the sealing element is reduced, the fatigue process is delayed, and the sealing life is effectively prolonged.

Description

Power main shaft sealing structure of pipe-jacking tunneling machine

Technical Field

The utility model relates to a rock pipe jacking entry driving machine technical field specifically is a power main shaft seal structure of pipe jacking entry driving machine.

Background

When the pipe-jacking tunneling machine works, the cutter head is driven to rotate by the power main shaft in the machine so as to realize cutting or crushing action. The sand and gravel stripped from the stratum are carried by water to form a slurry mixture which is randomly splashed to all positions of the mud bin. Some of the particles in this slurry mixture can enter the gap between the power shaft and its supporting structure, causing irreversible wear to the rotating power shaft and even leading to scrapping of the power shaft. Therefore, whether the sealing performance of the power main shaft of the pipe-jacking tunneling machine is good or not plays a decisive role in the service life of the equipment. The sealing structure of the main shaft of the existing various pipe-jacking tunneling machines is mainly sealed in a multi-layer plugging manner by various sealing elements such as sealing rings (strips) and the like, and the sealing pertinence of the sealing elements is not strong, so that the sealing structures are not only complex in structure and complex to process, but also have unsatisfactory sealing performance, and cannot provide long-time effective sealing for a power main shaft. Therefore, the power main shaft sealing structure of the pipe-jacking tunneling machine is provided, and the problem that the long-time sealing performance of the main shaft of the existing pipe-jacking tunneling machine is poor is solved.

SUMMERY OF THE UTILITY MODEL

To above problem, the utility model provides a power main shaft seal structure of pipe-jacking entry driving machine solves the not good defect of long-time sealing performance of current pipe-jacking entry driving machine power main shaft sealing device.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a push pipe entry driving machine's power main shaft seal structure, includes power box and power main shaft, the power main shaft passes through support bearing and installs on the power box, last mud sealing cover and the blade disc taper sleeve of having cup jointed of power main shaft, mud sealing cover installs on the power box through a plurality of second connecting bolt of group, and mud sealing cover inboard is provided with combined seal spare, combined seal spare inner circle and power main shaft sealing connection, and the blade disc taper sleeve passes through the connector key and links to each other with the power main shaft, and blade disc taper sleeve one end links to each other with mud sealing cover, and its other end is provided with preceding closure plate, preceding closure plate passes through the tip at the power main shaft of a plurality of first connecting bolt of group.

The utility model discloses a further technological improvement lies in: a plurality of sealing grooves are formed in the inner side of the mud sealing sleeve, and the sealing grooves are sequentially a dustproof sealing groove, a silt sealing groove, a water sealing groove, an oil storage groove and an oil sealing groove from outside to inside.

The utility model discloses a further technological improvement lies in: the side wall of the mud sealing sleeve is provided with a pressure oil duct, an inlet of the pressure oil duct is positioned at the end part of one side of the mud sealing sleeve, and an outlet of the pressure oil duct is communicated with the oil storage tank.

The utility model discloses a further technological improvement lies in: one side of the mud sealing sleeve close to the cutter head taper sleeve is provided with a labyrinth sealing groove, and the cutter head taper sleeve is provided with an annular belt bulge matched with the labyrinth sealing groove.

The utility model discloses a further technological improvement lies in: the combined sealing piece comprises a dustproof seal, a silt sealing piece, a water sealing piece and an oil sealing piece, wherein the dustproof seal, the silt sealing piece, the water sealing piece and the oil sealing piece are respectively installed in a dustproof sealing groove, a silt sealing groove, a water sealing groove and an oil sealing groove.

Compared with the prior art, the beneficial effects of the utility model are that:

aiming at the common slurry mixture components in the construction of the pipe-jacking tunneling machine, the design of a multi-pass grading targeted sealing structure and a pressure active slag discharging sealing structure is adopted. When reaching outstanding sealed effect, the characteristic difference between full play sealing member has carried out the pertinence sealed again, still initiatively arranges the sediment through pressure, reduces sealing member operating pressure, delays fatigue process, effectively prolongs sealed life-span.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall explosion structure of the present invention;

FIG. 2 is a schematic structural view of the mud sealing sleeve of the present invention;

FIG. 3 is a schematic sectional view taken along the direction A-A of FIG. 2 according to the present invention;

FIG. 4 is an enlarged schematic view of the structure of FIG. 3B according to the present invention;

FIG. 5 is a schematic view of an assembly structure of the cutter head taper sleeve and the mud sealing sleeve of the present invention;

FIG. 6 is an enlarged schematic view of the structure of FIG. 5;

FIG. 7 is a schematic view of an assembly structure of the mud sealing sleeve and the power spindle of the present invention;

fig. 8 is an enlarged schematic view of the structure of fig. 7 at D according to the present invention.

In the figure: 1. a first connecting bolt; 2. a front closure plate; 3. a cutter head taper sleeve; 4. a second connecting bolt; 5. sealing a mud sleeve; 50. a labyrinth seal groove; 51. a pressure oil passage; 52. a dust-proof sealing groove; 53. a silt sealing groove; 54. a water seal groove; 55. an oil storage tank; 56. an oil seal groove; 6. a power spindle; 7. a power box body; 8. a support bearing; 9. a connecting bond; 10. a composite seal; 101. dust-proof sealing; 102. a silt sealing element; 103. a water seal; 104. an oil seal.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Please refer to fig. 1, a power spindle sealing structure of a pipe-jacking tunneling machine comprises a power box body 7 and a power spindle 6, wherein the power spindle 6 is installed on the power box body 7 through a supporting bearing 8, a mud sealing sleeve 5 and a cutter head taper sleeve 3 are sleeved on the power spindle 6, the mud sealing sleeve 5 is installed on the power box body 7 through a plurality of groups of second connecting bolts 4, a combined sealing element 10 is arranged on the inner side of the mud sealing sleeve 5, the inner ring of the combined sealing element 10 is in sealing connection with the power spindle 6, the cutter head taper sleeve 3 is connected with the power spindle 6 through a connecting key 9, one end of the cutter head taper sleeve 3 is connected with the mud sealing sleeve 5, the other end of the cutter head taper sleeve is provided with a front blocking plate 2, and the front blocking plate 2 is installed at the end part of the power spindle 6 through a plurality of groups of first connecting bolts 1.

Referring to fig. 2 and 3, a plurality of sealing grooves are formed in the inner side of the mud sealing sleeve 5, and the sealing grooves include a dust sealing groove 52, a silt sealing groove 53, a water sealing groove 54, an oil storage groove 55 and an oil sealing groove 56 in sequence from outside to inside; the side wall of the mud sealing sleeve 5 is provided with a pressure oil passage 51, the inlet of the pressure oil passage 51 is positioned at the end part of one side of the mud sealing sleeve 5, and the outlet of the pressure oil passage 51 is communicated with an oil storage tank 55.

Referring to fig. 3-6, a labyrinth seal groove 50 is formed in one side of the mud sealing sleeve 5 close to the cutter head taper sleeve 3, and an annular belt protrusion matched with the labyrinth seal groove 50 is arranged on the cutter head taper sleeve 3 to form a non-contact seal.

Referring to fig. 7 and 8, the combined sealing member 10 includes a dust seal 101, a sand seal 102, a water seal 103 and an oil seal 104, and the dust seal 101, the sand seal 102, the water seal 103 and the oil seal 104 are respectively installed in the dust seal groove 52, the sand seal groove 53, the water seal groove 54 and the oil seal groove 56 to form a multi-contact sealing strip.

The working principle is as follows: the utility model discloses when using, blade disc and power shaft connecting part are located the mud storehouse of push bench, and the push bench entry driving machine is at the during operation, for the mud that silt particle and water mix formation in the mud storehouse. After the slurry mixture is screened by the labyrinth seal groove 50, large-diameter particles can be blocked; the dust seal 101 arranged in the dust seal groove 52 can block and delay slurry mixture from entering the joint surface of the mud seal sleeve 5 and the power spindle 6, and filter a part of particulate matters with larger diameters again; the sand seal 102 installed in the sand seal groove 53 can effectively seal the remaining insoluble particles in the slurry mixture; a water seal 103 installed in the water seal groove 54 may seal the liquid component in the slurry mixture such that the slurry mixture is completely blocked outside; one oil seal 104 arranged in each of the two oil seal grooves 56 can seal gear oil leaking along the surface of the power spindle 6; the oil reservoir 55 stores grease, which is pumped in via the pressure oil passage 51 and forms a certain pressure in the oil reservoir 55. When this pressure acts on the oil seal 104, the sealing performance of the oil seal 104 can be improved, and the gear oil leaking from the power case 7 can be effectively sealed. In addition, under the action of pressure, the lubricating grease can pass through the joint surfaces of other sealing parts and the power main shaft 6, and push away substances accumulated on the outer sides of the joint surfaces from the joint surfaces, so that the slag discharge action is completed. When pressure is equalized, the seals rejoin the power shaft 6 and form a seal. At the same time, the grease also reduces the friction of the seals with the power spindle 6.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a push pipe entry driving machine's power main shaft seal structure, includes power box (7) and power main shaft (6), install on power box (7) power main shaft (6) through support bearing (8), the last mud cover (5) and the blade disc taper sleeve (3) of having cup jointed of power main shaft (6), its characterized in that: the mud sealing sleeve (5) is installed on the power box body (7) through a plurality of groups of second connecting bolts (4), the inner side of the mud sealing sleeve (5) is provided with a combined sealing element (10), the inner ring of the combined sealing element (10) is connected with the power main shaft (6) in a sealing mode, the cutter head taper sleeve (3) is connected with the power main shaft (6) through a connecting key (9), one end of the cutter head taper sleeve (3) is connected with the mud sealing sleeve (5), the other end of the cutter head taper sleeve is provided with a front plugging plate (2), and the front plugging plate (2) is installed at the end part of the power main shaft (6) through a plurality of groups of first connecting bolts (1).

2. The power main shaft sealing structure of the pipe-jacking tunneling machine according to claim 1, wherein a plurality of sealing grooves are formed in the inner side of the mud sealing sleeve (5), and the sealing grooves are a dustproof sealing groove (52), a silt sealing groove (53), a water sealing groove (54), an oil storage groove (55) and an oil sealing groove (56) from outside to inside in sequence.

3. The power main shaft sealing structure of the pipe-jacking tunneling machine according to claim 2, wherein a pressure oil passage (51) is arranged on the side wall of the mud sealing sleeve (5), the inlet of the pressure oil passage (51) is positioned at the end part of one side of the mud sealing sleeve (5), and the outlet of the pressure oil passage (51) is communicated with the oil storage tank (55).

4. The power spindle sealing structure of the pipe-jacking tunneling machine according to claim 2, wherein a labyrinth sealing groove (50) is formed in one side, close to the cutter head taper sleeve (3), of the mud sealing sleeve (5), and an annular belt protrusion matched with the labyrinth sealing groove (50) is formed in the cutter head taper sleeve (3).

5. The power spindle sealing structure of a pipe jacking machine according to claim 2, wherein the combined sealing member (10) comprises a dust seal (101), a sand seal (102), a water seal (103) and an oil seal (104), and the dust seal (101), the sand seal (102), the water seal (103) and the oil seal (104) are respectively installed in the dust seal groove (52), the sand seal groove (53), the water seal groove (54) and the oil seal groove (56).