CN213117488U

CN213117488U - Self-adaptive driving sealing system

Info

Publication number: CN213117488U
Application number: CN202022151516.XU
Authority: CN
Inventors: 郑康泰; 周倩; 肖威; 贾连辉; 杨聚辉; 吕旦; 史伟
Original assignee: China Railway Engineering Equipment Group Co Ltd CREG
Current assignee: China Railway Engineering Equipment Group Co Ltd CREG
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-05-04
Anticipated expiration: 2030-09-27

Abstract

The utility model provides a self-adaptation drive sealing system, including drive box and rotation axis, be equipped with the sealing ring between drive box and the rotation axis, be equipped with on the sealing ring with rotation axis complex ring seal chamber, ring seal chamber and pressure balancing unit intercommunication. The utility model has the advantages of: the pressure of a lubricating medium can be directly adjusted without detecting the external pressure, so that the balance of the internal pressure and the external pressure of the sealing element is realized; the control is simple, the failure rate is reduced, and the problems of gradual change of the underwater driving sealing pressure and large bearing pressure are effectively solved.

Description

Self-adaptive driving sealing system

Technical Field

The utility model relates to a deep well construction equipment especially indicates a self-adaptation drive sealing system.

Background

For water-rich and weak broken geology, a drilling method is often adopted for construction, a shaft is filled with slurry, and the slurry can protect the wall and is convenient to carry dregs for slag tapping. In order to increase the drilling torque and improve the stress of the drill rod, a power submerged type drive is adopted. However, with the increasing excavation depth, the pressure applied to the seal is gradually increased, and if the excavation depth is up to 1000 meters, the pressure applied to the seal reaches more than ten MPa, so that the seal can directly bear the high pressure at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sealed system of self-adaptation drive has solved the sealed pressure-bearing of drive and has been big and the technological problem of gradual change, and this system can adapt to external pressure automatically, guarantees sealed internal and external pressure balance, improves sealed pressure-bearing condition, improves the sealing reliability, provides probably for the deep well construction of drive income well.

The technical scheme of the utility model is realized like this: the self-adaptive driving sealing system comprises a driving box body and a rotating shaft, wherein a sealing ring is arranged between the driving box body and the rotating shaft, a ring sealing cavity matched with the rotating shaft is arranged on the sealing ring, and the ring sealing cavity is communicated with a pressure balancing device.

And a sealed cavity I is formed between the driving box body and the rotating shaft and is communicated with the pressure balancing device.

The sealing ring is connected with the driving box body.

And a sealing element is arranged between the sealing ring and the rotating shaft.

And the sealing ring is provided with a flushing hole matched with the rotating shaft.

The ring seal cavity comprises a seal cavity II and a seal cavity III.

The sealing ring include sealing ring I and sealing ring II, sealing ring I is connected with the drive box, be equipped with on the sealing ring I with rotation axis complex seal chamber II, sealing ring II is connected with sealing ring I, be equipped with on the sealing ring II with rotation axis complex seal chamber III.

And a flushing hole matched with the rotating shaft is formed in the sealing ring II.

The sealing ring I and the sealing ring II are both L-shaped, and the sealing ring II is positioned on the outer side of the sealing ring I and is sleeved in the sealing ring I.

Sealing ring I and rotation axis between be equipped with sealing member I and sealing member II, seal chamber II is located between sealing member I and the sealing member II, is equipped with sealing member III between sealing ring II and the rotation axis, seal chamber III is located between sealing member II and the sealing member III.

The pressure balancing device is a balance piston type or a leather bag type pressure balancing device.

The pressure balancing device comprises a shell, a piston is arranged in a balancing cavity of the shell, a slurry inlet is formed in one side of the balancing cavity, and a lubricating medium is arranged at the other end of the balancing cavity and communicated with a sealing cavity.

The rotating shaft is connected with a pressing ring which presses the sealing ring.

And the rotating shaft is provided with a spacer ring matched with the sealing ring.

The utility model has the advantages of: the pressure of a lubricating medium can be directly adjusted without detecting the external pressure, so that the balance of the internal pressure and the external pressure of the sealing element is realized; the control is simple, the failure rate is reduced, and the problems of gradual change of the underwater driving sealing pressure and large bearing pressure are effectively solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description 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 structural diagram of the present invention.

In the figure: 100-pressure balancing device, 101-slurry inlet, 102-shell, 103-piston, 104-lubricating medium; 200-driving the box body; 300-sealing the cavity I; 400-sealing ring I, 401-sealing cavity II, 402-sealing cavity III; 500-sealing ring II, 501-flushing hole; 600-pressing a ring; 700-a rotation axis; 800-spacer ring; 900-seal, 901-seal I, 902-seal II, 903-seal III.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1, an adaptive driving sealing system includes a pressure balancing device 100, a driving case 200, a sealing ring, a pressure ring 600, a rotating shaft 700, and a spacer ring 800.

A sealing ring is arranged between the driving box body 200 and the rotating shaft 700, a ring sealing cavity matched with the rotating shaft 700 is arranged on the sealing ring, and the ring sealing cavity is communicated with the pressure balancing device 100. A sealed cavity I300 is formed between the driving box body 200 and the rotating shaft 700, and the sealed cavity I300 is communicated with the pressure balancing device 100.

The sealing ring includes sealing ring I400 and sealing ring II 500, and sealing ring I400 passes through bolt and drive box 200 fixed connection, be equipped with on the sealing ring I400 with rotation axis 700 complex seal chamber II 401, sealing ring II 500 is connected with sealing ring I400, be equipped with on the sealing ring II 500 with rotation axis 700 complex seal chamber III 402. The sealing ring II 500 is provided with a washing hole 501 matched with the rotating shaft 700, and high-pressure water is washed through the washing hole 501 to reduce mud particle deposition.

The sealing rings I400 and II 500 are L-shaped, and the sealing ring II 500 is positioned outside the sealing ring I400 and is sleeved in the sealing ring I400. A sealing element I901 and a sealing element II 902 are arranged between the sealing ring I400 and the rotating shaft 700, a sealing cavity II 401 is positioned between the sealing element I901 and the sealing element II 902, a sealing element III 903 is arranged between the sealing ring II 500 and the rotating shaft 700, and a sealing cavity III 402 is positioned between the sealing element II 902 and the sealing element III 903.

The pressure balance device 100 is a balance piston type or a bladder type pressure balance device, and the embodiment of the present invention employs a balance piston type pressure balance device, which includes a housing 102, a piston 103 is disposed in a balance cavity of the housing 102, a slurry inlet 101 is disposed on one side of the balance cavity, and a lubricating medium is disposed at the other end of the balance cavity and communicated with a seal cavity, and the lubricating medium includes but is not limited to grease and lubricating oil. The slurry inlet is communicated with external slurry, and the pressure of the slurry acts on a lubricating medium in the sealed cavity through the piston, so that the balance of internal and external pressure is ensured, and underwater sealing is realized. The pressure balancing device is communicated with external slurry and the lubricating medium, so that the pressure of the lubricating medium can be automatically changed along with the change of the excavation depth.

The rotating shaft 700 is connected with the pressing ring 600 through a bolt, and the pressing ring is used for pressing a sealing ring II. The rotating shaft 700 is provided with a spacer ring 800 which is used for replacing the rotating shaft for sealing, and once the spacer ring is worn, the spacer ring can be replaced in time.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adaptive drive sealing system comprising a drive housing (200) and a rotatable shaft (700), characterized in that: and a sealing ring is arranged between the driving box body (200) and the rotating shaft (700), a ring sealing cavity matched with the rotating shaft (700) is arranged on the sealing ring, and the ring sealing cavity is communicated with the pressure balancing device (100).

2. The adaptively driven sealing system of claim 1, wherein: a sealed cavity I (300) is formed between the driving box body (200) and the rotating shaft (700), and the sealed cavity I (300) is communicated with the pressure balancing device (100).

3. The adaptively driven sealing system as in claim 1 or 2, wherein: and a sealing element is arranged between the sealing ring and the rotating shaft (700).

4. The adaptively driven sealing system as in claim 1 or 2, wherein: the sealing ring is provided with a flushing hole (501) matched with the rotating shaft (700).

5. The adaptively driven sealing system as in claim 1 or 2, wherein: the sealing ring include sealing ring I (400) and sealing ring II (500), sealing ring I (400) are connected with drive box (200), be equipped with on sealing ring I (400) with rotation axis (700) complex seal chamber II (401), sealing ring II (500) are connected with sealing ring I (400), be equipped with on sealing ring II (500) with rotation axis (700) complex seal chamber III (402).

6. The adaptively driven sealing system of claim 5, wherein: a sealing element I (901) and a sealing element II (902) are arranged between the sealing ring I (400) and the rotating shaft (700), a sealing cavity II (401) is positioned between the sealing element I (901) and the sealing element II (902), a sealing element III (903) is arranged between the sealing ring II (500) and the rotating shaft (700), and a sealing cavity III (402) is positioned between the sealing element II (902) and the sealing element III (903).

7. The adaptively driven sealing system as in claim 1 or 2, wherein: the pressure balancing device (100) is a balanced piston type or a leather bag type pressure balancing device.

8. The adaptively driven sealing system as in claim 1 or 2, wherein: the pressure balancing device (100) comprises a shell (102), a piston (103) is arranged in a balancing cavity of the shell (102), a slurry inlet (101) is formed in one side of the balancing cavity, and a lubricating medium is arranged at the other end of the balancing cavity and communicated with a sealing cavity.

9. The adaptively driven sealing system as in claim 1 or 2, wherein: the rotating shaft (700) is connected with a pressing ring (600) which is pressed with a sealing ring.

10. The adaptively driven sealing system as in claim 1 or 2, wherein: and the rotating shaft (700) is provided with a spacing ring (800) matched with the sealing ring.