CN214999395U

CN214999395U - Split shaft sealing device

Info

Publication number: CN214999395U
Application number: CN202120698578.4U
Authority: CN
Inventors: 刘勇; 徐兴华; 武志飞; 史青君; 骆春晓; 任泰峰; 王姚
Original assignee: BMEI Co Ltd
Current assignee: BMEI Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-12-03
Anticipated expiration: 2031-04-07

Abstract

A split shaft sealing device belongs to the technical field of sludge treatment, a lock nut and a shaft sleeve are sleeved on a shaft, the shaft sleeve is connected with the shaft in a key mode, the lock nut is installed on the left side of the shaft sleeve, threads are turned on the shaft, an O-shaped ring installed in a groove at the right end of the shaft sleeve is tightly attached to a shaft shoulder, a shaft seal seat comprises an upper shaft seal seat and a lower shaft seal seat, an oil injection ring comprises an upper oil injection ring and a lower oil injection ring, the upper shaft seal seat and the lower shaft seal seat are connected through taper pins and hinge hole bolts to form an integral shaft seal seat, the shaft seal seat is fixed with an equipment body through bolts, and a sealing ring, the upper oil injection ring, the lower oil injection ring and a spacer ring are accommodated in an inner cavity of the shaft seal seat; the upper gland and the lower gland are connected into a whole by bolts and are connected with the shaft seal seat by fasteners, the upper shaft seal seat is provided with an oil cup, and the lower shaft seal seat is provided with an oil drainage hole. The sealing device is suitable for sealing between the rotating shaft and the container (or the shell) when wet sludge with the water content of about 80% is stirred in the container (or the shell).

Description

Split shaft sealing device

Technical Field

The utility model relates to a subdivision formula shaft seal device belongs to the shaft seal technical field, is applicable to the moisture content and is 80% wet mud when being stirred sealed between rotation axis and container (or casing) in container (or casing).

Background

With the rapid development of economy and the acceleration of urbanization process in China, the amount of sludge generated in cities in China is also rapidly increased. In the field of sludge treatment, sludge drying and incineration is a technology recommended by the state for environmental protection at present, the application range is wide, a typical device for sludge drying is a paddle type dryer, the paddle type dryer is a device for heat exchange of sludge in a container through stirring, the sludge generally contains 80% of water, the temperature is about 150 ℃, and the sludge leakage at the junction of a shaft and a shell end plate is an important index for measuring the service performance of the device. The traditional shaft seal mode is packing seal (packing seal), and this kind of mode is in when the packing trades the state newly, and the shaft seal condition is good, but the time just begins to leak for a short time, and it is more serious more to leak more moreover, adjusts the gland and changes the work of packing and become frequently, and vase form can be ground into to axle journal (axle sleeve), just will shut down the maintenance as long as leak mud, both influences the environment and reduces production efficiency again.

The shaft sealing device is used on a shaft with the diameter phi of 300mm and the length of 8m, two ends of the shaft are respectively provided with 11 annular parts, the shaft can occupy axial space when being sleeved one by one during installation, and the length of the shaft needs to be lengthened obviously to obtain the space, so that the shaft sealing device is a waste operation mode which is not environment-friendly and uneconomical.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a split shaft sealing device.

A split shaft sealing device is characterized in that a lock nut and a shaft sleeve are sleeved on a shaft, the shaft sleeve is in key connection with the shaft, the lock nut is installed on the left side of the shaft sleeve, threads are turned on the shaft, an O-shaped ring installed in a groove at the right end of the shaft sleeve is tightly attached to a shaft shoulder, a shaft seal seat comprises an upper shaft seal seat and a lower shaft seal seat, an oil injection ring comprises an upper oil injection ring and a lower oil injection ring, the upper shaft seal seat and the lower shaft seal seat are connected through taper pins and hinge hole bolts to form an integral shaft seal seat, the shaft seal seat is fixed with an equipment body through bolts, and a sealing ring, the upper oil injection ring, the lower oil injection ring and a spacer ring are accommodated in an inner cavity of the shaft seal seat; the upper gland and the lower gland are connected into a whole by bolts and are connected with the shaft seal seat by fasteners, the shaft seal assembly consists of a seal ring, an upper oil injection ring, a lower oil injection ring and a spacer ring, an oil cup is arranged on the upper shaft seal seat, and an oil drainage hole is arranged on the lower shaft seal seat.

And a shaft sleeve is arranged between the shaft and the sealing ring and is subjected to surface hardening treatment. The sealing ring is composed of a plurality of sealing rings without skeleton seal. The upper gland, the upper shaft seal seat and the upper oil injection ring are three symmetrical upper and lower bodies.

A split shaft sealing method comprising the steps of:

step 1, when the fluid-shaped sludge overflows from the circular hole part of the end plate of the container to the outside of the container, the fluid-shaped sludge is blocked by an O-shaped ring at the end part of the shaft sleeve, and similarly, when the fluid-shaped sludge overflows from the surface of the shaft sleeve to the outside of the container, the fluid-shaped sludge is blocked by a plurality of groups of sealing rings.

And 2, uniformly distributing the lubricating grease from the oil cup on the friction surface between the rotating shaft and the sealing member through the axial and radial grooves of the oil filling ring.

And 3, adjusting the pretightening force of the sealing ring by the bolt group of the gland.

And 4, when the sealing element needs to be replaced, the upper half part and the lower half part which are symmetrically split are conveniently disassembled, and the positioning pins and the reamed hole bolts are arranged on the upper half part and the lower half part, so that the precision requirement is met during installation.

The utility model has the advantages that: when the sealing element is invalid and needs to be replaced, the utility model can solve the problem of the invalid sealing element by disassembling the upper body of the shaft seal seat; the other rotating parts on the shaft are not required to be dismounted together and taken out from the shaft end; the axle sleeve surface is implemented Ni60 alloy powder spray welding, and thickness 1.5mm, this is a fine wear-resisting material, and hardness can reach HRC62, can keep its permanent working property, the utility model discloses an excellent sealing performance is that domestic homotypic equipment can not compare completely.

The utility model discloses shaft seal seat, oiling ring, gland adopt the structure of symmetry subdivision to install. Is provided with a sealing element which is resistant to high temperature and made of different materials. The shaft sleeve adopts a spray welding coating to strengthen the hardness, and shows extremely strong wear resistance. The sealing device is suitable for sealing between the rotating shaft and the container (or the shell) when wet sludge with the water content of about 80% is stirred in the container (or the shell).

When the fluid sludge overflows from the circular hole part of the end plate of the container to the outside of the container, the fluid sludge is blocked by the O-shaped ring at the end part of the shaft sleeve, and similarly, when the fluid sludge overflows from the surface of the shaft sleeve to the outside of the container, the fluid sludge is blocked by a plurality of groups of sealing rings; the lubricating grease from the oil cup is uniformly distributed on the friction surface between the rotating shaft and the sealing element through the axial and radial passages of the oil filling ring; the bolt group of the gland can realize the adjustability of the pretightening force of the sealing ring. When the sealing element needs to be replaced, the upper half part of the symmetrically split parts can be detached conveniently, and the upper half part and the lower half part are provided with the positioning pins and the reamed hole bolts, so that the same precision requirement can be met when the shaft seal seat is installed again.

The utility model discloses an advantage still includes: the split structure of the shaft seal seat is convenient for installation and disassembly when an internal sealing element needs to be replaced; the HNBR and FKM sealing rings are reasonably arranged, so that the high temperature of a fluid medium can be borne, and the wear resistance can be enhanced; the surface of the shaft sleeve is subjected to Ni60 alloy powder spray welding process, the thickness is 1.5mm, and the hardness can reach HRC62, so that the wear resistance is good, and the service life is long.

Drawings

The present invention may be better understood, and many of the attendant advantages readily appreciated as the same becomes better understood by reference to the following detailed description, when considered in connection with the accompanying drawings, wherein the same are illustrated in the same drawing figures which are intended to provide a further understanding of the invention and constitute a part of this specification, and wherein the same are illustrative of exemplary embodiments and are not intended to be construed as unduly limiting the invention.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic side view of the present invention.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

Obviously, many modifications and variations of the present invention based on the spirit of the present invention will be apparent to those skilled in the art.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.

Example 1: as shown in fig. 1 and 2, the split shaft seal device includes a lock nut 1, a shaft sleeve 2, an upper gland 3, an upper shaft seal seat 4, an oil cup 5, a seal ring 6, an upper oil injection ring 7, a spacer ring 8, an O-ring 9, a lower oil injection ring 10, an oil drain hole 11, a lower shaft seal seat 12, a lower gland 13, a fastener 14, a key 15, a shaft 16 (indicated by a two-dot chain line), a hinge hole bolt 17, a taper pin 18, and an apparatus body 19.

The lock nut 1 and the shaft sleeve 2 are sleeved on the shaft 16, the shaft sleeve 2 is in key connection with the shaft 16 and can slide on the shaft, the lock nut 1 is installed on the left side of the shaft sleeve 2, threads are turned on the shaft 16, the shaft sleeve 2 moves towards the right side by rotating the lock nut 1, meanwhile, an O-shaped ring installed in a groove at the right end of the shaft sleeve 2 can be tightly attached to a shaft shoulder, the shaft seal seat comprises an upper shaft seal seat 4 and a lower shaft seal seat 12, the upper shaft seal seat 4 and the lower shaft seal seat 12 are connected through a taper pin 11 and a hinged hole bolt 17 to form an integral shaft seal seat, the shaft seal seat is fixed with an equipment body 19 through bolts, and a seal ring 6, an upper oil injection ring 7, a lower oil injection ring 10 and a spacer ring 8 are accommodated in an inner cavity of the shaft seal seat; the upper gland 3 and the lower gland 13 are connected into a whole by bolts and are connected with the shaft seal seat through the fastening piece 14, and the shaft seal component consisting of the sealing ring 6, the upper oil injection ring 7, the lower oil injection ring 10 and the spacer ring 8 is pressed by driving the gland to move towards the right side through rotating the fastening piece 14. The upper shaft seal seat 4 is provided with an oil cup 5, the lower shaft seal seat 12 is provided with an oil drain hole 11, and the oil drain hole are plugged by a screw plug at ordinary times and are inlet and outlet of lubricating grease.

The shaft seal part is the only outlet of the rotary stirring shaft for connecting the inside and the outside of the container. Between the shaft and the sealing ring, a shaft sleeve 2 is arranged, and the shaft sleeve 2 is subjected to surface hardening treatment to protect the shaft from being abraded. The sleeve 2 can be replaced.

The sealing ring 6 is composed of a plurality of sealing rings without skeleton seal, and lubricating grease is uniformly supplied to the sealing rings by radial oil grooves of the oil injection ring.

The upper gland 3, the upper shaft seal seat 4 and the upper oil injection ring 7 are three symmetrical upper and lower bodies, and the function of the upper gland is to facilitate the installation and the disassembly and the replacement of vulnerable parts, such as sealing ring rings.

The sealing ring made of special materials can resist fluid with the temperature of 200 ℃ and acid and alkali corrosivity.

The sealing ring 6 is composed of a plurality of parts, the materials of the sealing ring can be divided into two types, namely HNBR and FKM, and the sealing ring is used for bearing the sealing between the shaft sleeve and the shaft seal seat body, and the O-shaped ring 9 is used for bearing the gap sealing between the shaft and the shaft sleeve.

The oil injection ring comprises an upper oil injection ring 7 and a lower oil injection ring 10.

Example 2: as shown in fig. 1 and 2, a split shaft sealing method includes the steps of:

step 1, sleeving an O-shaped ring 9 in a groove on the end face of a shaft sleeve 2;

step 2, mounting the shaft sleeve 2 and the key 15 on the shaft 16, rotating the lock nut 1 to enable the shaft sleeve 2 to move towards the right side to be tightly attached to a shaft right side shaft shoulder, and enabling the O-shaped ring 9 to be tightly attached to the shaft shoulder;

step 3, connecting and fixing the lower shaft seal seat 12 and the equipment body 19 by using a fastener;

step 4, connecting the upper oil injection ring 7 and the lower oil injection ring 10 by using a fastener, and then sequentially sleeving the sealing ring 6, the spacer ring 8 and the oil injection ring on the shaft sleeve 2;

step 5, connecting the upper shaft seal seat 4 and the lower shaft seal seat 12 into a whole by using a taper pin 18, a reamed hole bolt 17 and other fasteners, and connecting and fixing the upper shaft seal seat and the lower shaft seal seat with an equipment body 19 by using the fasteners;

and 6, connecting the upper gland 3 and the lower gland 13 into a whole by using a fastening piece, then connecting the upper gland and the lower gland with a shaft seal seat by using a fastening piece 14, and adjusting the abrasion compensation amount of the sealing ring 6 in the shaft seal seat by rotating the fastening piece 14.

The utility model is arranged on the stirring shaft and fixed on the end plate of the container. The grease needed by the sealing element is injected from an external oil filling port by a grease gun and is uniformly distributed at the gap between the sealing element and the shaft through a groove on the oil filling ring.

As described above, the appearance, the structure and the arrangement form of each component, the material, the hard layer reinforcing manner and the similar deformation of the present invention are all included in the protection scope of the present invention.

As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the invention and its effects. Therefore, all such modifications are included in the scope of the present invention.

Claims

1. A split shaft sealing device is characterized in that a lock nut and a shaft sleeve are sleeved on a shaft, the shaft sleeve is in key connection with the shaft, the lock nut is installed on the left side of the shaft sleeve, threads are turned on the shaft, an O-shaped ring installed in a groove at the right end of the shaft sleeve is tightly attached to a shaft shoulder, a shaft seal seat comprises an upper shaft seal seat and a lower shaft seal seat, the oil injection ring comprises an upper oil injection ring and a lower oil injection ring, the upper shaft seal seat and the lower shaft seal seat are connected through taper pins and hinge hole bolts to form an integral shaft seal seat, the shaft seal seat is fixed with an equipment body through bolts, and a sealing ring, the upper oil injection ring, the lower oil injection ring and a spacer ring are accommodated in an inner cavity of the shaft seal seat; the upper gland and the lower gland are connected into a whole by bolts and are connected with the shaft seal seat by fasteners, the shaft seal assembly consists of a seal ring, an upper oil injection ring, a lower oil injection ring and a spacer ring, an oil cup is arranged on the upper shaft seal seat, and an oil drainage hole is arranged on the lower shaft seal seat.

2. The split shaft seal of claim 1, wherein a bushing is disposed between the shaft and the seal ring.

3. The split shaft seal of claim 1, wherein the seal ring comprises a plurality of frameless seal rings.

4. The split shaft seal of claim 1, wherein the upper gland, the upper shaft seal seat and the upper oil injection ring are three symmetrical upper and lower bodies.