阅读说明：本技术 一种轴封装置 (Shaft seal device ) 是由 饶武江 何超平 杜巧玲 李亚辉 黄浩文 杨阳 于 2019-09-27 设计创作，主要内容包括：本发明涉及密封技术领域,公开了一种轴封装置包括设于转轴的周向方向上的安装座、定距环、调节组件以及密封组件,所述调节组件包括调节环以及定位件,所述调节环的外轮廓呈圆形,且所述调节环的外轮廓与所述定距环相抵接,所述调节环的内轮廓设有与所述密封组件相抵接的圆弧组,各所述定位件设于所述调节环的内轮廓上。通过在所述定距环和所述密封组件之间设置所述调节环,保证所述定距环的安装轴线保持不变,而通过使所述密封组件与所述调节环的内轮廓上的圆弧组的不同圆弧抵接,并利用所述定位件将所述密封组件固定在对应的圆弧上,对所述密封组件的安装轴线进行偏心调整,实现快速对轴封安装过程中的偏心调节。(The invention relates to the technical field of sealing, and discloses a shaft sealing device which comprises a mounting seat, a distance ring, an adjusting assembly and a sealing assembly, wherein the mounting seat, the distance ring, the adjusting assembly and the sealing assembly are arranged on a rotating shaft in the circumferential direction, the adjusting assembly comprises an adjusting ring and positioning pieces, the outer contour of the adjusting ring is circular, the outer contour of the adjusting ring is abutted against the distance ring, an arc group abutted against the sealing assembly is arranged on the inner contour of the adjusting ring, and each positioning piece is arranged on the inner contour of the adjusting ring. Through the distance ring with set up between the seal assembly the adjustable ring guarantees the installation axis of distance ring keeps unchangeable, and through making seal assembly with the different circular arc butts of the circular arc group on the interior profile of adjustable ring, and utilize the setting element will seal assembly fixes on the circular arc that corresponds, and is right seal assembly's installation axis carries out eccentric adjustment, realizes the eccentric adjustment in the quick counter shaft seal installation.)

1. The shaft seal device is characterized by comprising a mounting seat, a distance ring, an adjusting assembly and a sealing assembly which are arranged in the circumferential direction of a rotating shaft, wherein the distance ring is positioned between the mounting seat and the sealing assembly, the adjusting assembly is positioned between the distance ring and the sealing assembly,

the adjusting part includes that adjustable ring and a plurality of are used for fixing sealing component's setting element, the outline of adjustable ring is circular, just the outline of adjustable ring with distance ring looks butt, the interior profile of adjustable ring be equipped with be used for right sealing component carry out eccentric adjustment and with the circular arc group of sealing component looks butt, each the setting element is located on the interior profile of adjustable ring.

2. The shaft seal apparatus of claim 1 wherein said set of arcs includes concentric arcs concentric with said outer profile and first and second eccentric arcs that are eccentric with respect to said outer profile, said concentric arcs, said first and second eccentric arcs being sequentially joined end-to-end to form a circular-like profile.

3. The shaft seal apparatus of claim 2 wherein said concentric circular arc, said first eccentric circular arc and said second eccentric circular arc are smoothly transitioned therebetween.

4. The shaft sealing device according to claim 2, wherein the center of the concentric circular arcs is located at the center of the outer contour, and the center of the first eccentric circular arc and the center of the second eccentric circular arc are located at two trisections of the outer contour, respectively.

5. The shaft sealing device according to claim 2, characterized in that the distance between the center of the concentric circular arc and the center of the first eccentric circular arc is smaller than the distance between the center of the concentric circular arc and the center of the second eccentric circular arc.

6. The shaft seal apparatus of claim 5 wherein the arc length of said concentric circular arc is less than the arc length of said first eccentric circular arc, and wherein the arc length of said first eccentric circular arc is less than the arc length of said second eccentric circular arc.

7. The shaft seal apparatus of claim 1 wherein said adjustment ring is provided with a locating bore extending between said outer contour and said inner contour, said locating member being threadably connected to said locating bore.

8. The shaft sealing apparatus of claim 1 wherein a positioning groove is formed in a side surface of said adjusting ring, and said seal assembly is provided with a locking block abutting against said positioning groove.

9. The shaft sealing device according to any one of claims 1 to 8, wherein the adjusting ring is composed of a first half ring and a second half ring, a locking bolt and a positioning pin are provided between the first half ring and the second half ring, and an axial direction of the locking bolt is not parallel to an axial direction of the positioning pin.

10. Shaft sealing device according to any one of claims 1-8, characterized in that the sealing assembly comprises a seal abutting against the rotating shaft and a housing for mounting the seal, the housing and the distance ring being fixed to the mounting seat by means of fasteners.

Technical Field

The invention relates to the technical field of sealing, in particular to a shaft sealing device.

Background

A shaft seal is a sealing device provided to prevent leakage of liquid between an apparatus shaft and an apparatus housing. In the case of a propeller shaft for a ship, the shaft seal of the propeller shaft functions to prevent oil in a hull structure in which the propeller shaft is installed from leaking through a gap between the propeller shaft and the hull. The shaft seal device structure mainly comprises a shell, a circumferential sealing piece, an end face sealing gasket, a distance ring, a connecting fastener and the like. The circumferential sealing element is arranged on an inner hole of the shell, and the end face sealing gasket is arranged among the shell, the distance ring and the ship structure.

Brief description of shaft seal installation mode: the shaft seal inner hole is sleeved on the rotating shaft, and the circumferential sealing piece is tightly attached to the rotating shaft to realize sealing between the rotating shaft and the shaft seal. The big end of the shaft seal is arranged on the hull structure through a fastener, and an end face sealing gasket is arranged between each contact surface to realize the sealing between the shaft seal and the hull structure. Wherein, the circumferential seal is a dynamic seal and the end face seal is a static seal.

The shaft seal installation is important and difficult: because the main function of the shaft seal is the circumferential dynamic sealing function, the important point for ensuring the installation quality of the circumferential seal is the shaft seal installation. Meanwhile, the circumferential seal is a dynamic seal (namely, the circumferential seal is static, the rotating shaft rotates at a high speed relative to the circumferential seal, and a seal surface formed between the circumferential seal and the rotating shaft is dynamic), so that the dynamic seal has high requirement on the installation coaxiality of the circumferential seal and the rotating shaft. And the circumferential sealing element is fixed on the shaft seal shell, so that the installation coaxiality between the shaft seal shell and the rotating shaft is ensured. The installation coaxiality is influenced by multiple factors such as design precision, manufacturing precision, installation precision, environmental conditions and the like, the control difficulty is high, and the installation method is a difficult point for shaft seal installation.

The problem that the coaxiality of shaft seal installation of a ship propeller shaft does not reach the standard is frequent, and the deep analysis finds that the reason mainly has two aspects: 1. the design problem of the axis of the rotating shaft and the axis of the shaft seal exists, namely the design of different axialities exceeds the requirement of different axialities for mounting the shaft seal; 2. the structure (shaft seal mounting spigot) of the mounting shaft seal has the same-direction accumulation of manufacturing form and position tolerance, so that the final mounting coaxiality is not up to the standard.

Structurally, the axes of the housing mounting spigot, the distance ring mounting spigot and the circumferential seal of the existing shaft seal are theoretically completely coincident, i.e., the three are coaxial and cannot be eccentrically adjusted. Therefore, when the coaxiality of the axis of the propeller shaft and the axis of the distance ring mounting spigot is unqualified, the coaxiality of the shell where the circumferential sealing element is located and the shaft is unqualified, namely the dynamic sealing mounting state is unqualified, and the leakage risk exists. Because the prior art can't adjust the installation axis of casing, can't eliminate above-mentioned risk through the adjustment of installation link promptly. Although the problem can be solved by detaching the propeller shaft and then detaching the shaft seal shell to rework and mount the seam allowance, the processing procedure has large workload, long period, large associated risks such as shaft system damage and the like, and is very unfavorable for shipyards.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: how to realize the eccentric adjustment of the shaft seal device in the mounting link, so that the shaft seal and the rotating shaft have high-precision coaxiality.

In order to solve the technical problem, the invention provides a shaft seal device, which comprises a mounting seat, a distance ring, an adjusting assembly and a sealing assembly, wherein the mounting seat, the distance ring, the adjusting assembly and the sealing assembly are arranged in the circumferential direction of a rotating shaft, the distance ring is positioned between the mounting seat and the sealing assembly, the adjusting assembly is positioned between the distance ring and the sealing assembly,

the adjusting part includes that adjustable ring and a plurality of are used for fixing sealing component's setting element, the outline of adjustable ring is circular, just the outline of adjustable ring with distance ring looks butt, the interior profile of adjustable ring be equipped with be used for right sealing component carry out eccentric adjustment and with the circular arc group of sealing component looks butt, each the setting element is located on the interior profile of adjustable ring.

Preferably, the arc group includes a concentric arc concentric with the outer contour, and a first eccentric arc and a second eccentric arc eccentric with respect to the outer contour, and the concentric arc, the first eccentric arc, and the second eccentric arc are sequentially connected end to form a quasi-circular contour.

Preferably, the concentric circular arc, the first eccentric circular arc and the second eccentric circular arc are in smooth transition.

Preferably, the center of the concentric circular arc is located at the center of the outer contour, and the center of the first eccentric circular arc and the center of the second eccentric circular arc are located on two trisection lines of the outer contour respectively.

Preferably, a distance between the center of the concentric circular arc and the center of the first eccentric circular arc is smaller than a distance between the center of the concentric circular arc and the center of the second eccentric circular arc.

Preferably, the arc length of the concentric circular arc is smaller than the arc length of the first eccentric circular arc, and the arc length of the first eccentric circular arc is smaller than the arc length of the second eccentric circular arc.

Preferably, the adjusting ring is provided with a positioning hole penetrating between the outer contour and the inner contour, and the positioning part is in threaded connection with the positioning hole.

As the preferred scheme, the side of adjustable ring is equipped with the constant head tank, seal assembly be equipped with the fixture block of constant head tank looks butt.

Preferably, the adjusting ring comprises a first half ring and a second half ring, a locking bolt and a positioning pin are arranged between the first half ring and the second half ring, and the axial direction of the locking bolt is not parallel to the axial direction of the positioning pin.

Preferably, the seal assembly comprises a seal abutting against the rotating shaft and a housing for mounting the seal, and the housing and the distance ring are fixed on the mounting seat by fasteners.

Compared with the prior art, the shaft seal device provided by the embodiment of the invention has the beneficial effects that:

according to the embodiment of the invention, the adjusting ring is arranged between the distance ring and the sealing assembly, the circular outer contour of the adjusting ring is abutted against the distance ring, so that the installation axis of the distance ring is kept unchanged, the sealing assembly is abutted against different arcs of an arc group on the inner contour of the adjusting ring, and the sealing assembly is fixed on the corresponding arc by using the positioning piece, so that the eccentric adjustment of the installation axis of the sealing assembly is realized, the eccentric adjustment in the shaft seal installation process is realized rapidly on the premise of not influencing the original function of the shaft seal, the problem that the coaxiality of the shaft seal installation does not reach the standard is solved, the eccentric adjustment device has the advantages of simple structure, simplicity and convenience in operation, no influence on the original function of the shaft seal and the like, and the device is very obvious in help of reducing the shipbuilding quality risk and ensuring the launching node of a.

Drawings

Fig. 1 is a schematic sectional view showing the installation of a shaft sealing apparatus according to a preferred embodiment of the present invention.

FIG. 2 is a schematic view showing the structure of an adjusting ring in the shaft sealing apparatus according to the preferred embodiment of the present invention.

Fig. 3 is an enlarged schematic view of the structure at D in fig. 2.

Fig. 4 is a schematic view of the structure in the direction E in fig. 3.

Fig. 5 is a schematic cross-sectional view at F-F in fig. 2.

In the figure:

100. a rotating shaft;

200. a mounting seat;

300. a distance ring;

400. an adjustment assembly; 410. an adjusting ring; 411. an outer contour; 412. concentric circular arcs; 413. a first eccentric arc; 414. a second eccentric arc; 415. positioning holes; 416. positioning a groove; 417. a first half ring; 418. a second half ring; 419. mounting grooves; 420. a positioning member; 430. locking the bolt; 440. positioning pins;

500. a seal assembly; 510. a seal member; 520. a housing.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "connected," "fixed," and the like are used in a broad sense, and for example, the terms "connected," "connected," and "fixed" may be fixed, detachable, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

For convenience of description, the intersection point formed by the concentric arc 412, the first eccentric arc 413 and the second eccentric arc 414 is A, B, C, the concentric arc 412 is represented by a slope AB, the first eccentric arc 413 is represented by a slope BC, and the second eccentric arc 414 is represented by a slope CA, it is understood that the concentric arc 412, the first eccentric arc 413 and the second eccentric arc 414 correspond to all arc surfaces on the distance ring 300, and the sealing assembly 500 is abutted by different arc surfaces of the distance ring 300. Since the concentric circular arc 412, the first eccentric circular arc 413 and the second eccentric circular arc 414 do not vary greatly in position in fig. 2, for the sake of convenience of distinction, the concentric circular arc 412 is represented by a solid line, the first eccentric circular arc 413 is represented by a dotted line, and the second eccentric circular arc 414 is represented by a dotted line, which should not be construed as limiting the present invention.

As shown in fig. 1 to 5, according to the preferred embodiment of the present invention, there is provided a shaft sealing device including a mount 200 provided in a circumferential direction of a rotating shaft 100, a distance ring 300, an adjustment assembly 400, and a seal assembly 500, the distance ring 300 being located between the mount 200 and the seal assembly 500, the adjustment assembly 400 being located between the distance ring 300 and the seal assembly 500,

the adjusting assembly 400 comprises an adjusting ring 410 and a plurality of positioning members 420 for fixing the sealing assembly 500, the outer contour 411 of the adjusting ring 410 is circular, the outer contour 411 of the adjusting ring 410 is connected with the distance ring 300 in an abutting mode, the inner contour of the adjusting ring 410 is provided with an arc group for performing eccentric adjustment on the sealing assembly 500 and connecting with the sealing assembly 500 in an abutting mode, and each positioning member 420 is arranged on the inner contour of the adjusting ring 410.

In the shaft sealing device based on the technical characteristics, by arranging the adjusting ring 410 between the distance ring 300 and the sealing assembly 500, the circular outer contour 411 of the adjusting ring 410 abuts the distance ring 300, ensuring that the mounting axis of the distance ring 300 remains unchanged, while by abutting the seal assembly 500 against different ones of the set of arcs on the inner profile of the adjustment ring 410, the positioning member 420 is used to fix the sealing assembly 500 on the corresponding arc, so as to perform eccentric adjustment on the installation axis of the sealing assembly 500, under the prerequisite that does not influence the original function of bearing seal, realized the eccentric regulation in the quick shaft seal installation, solved the problem that the bearing seal installation axiality is not up to standard, have simple structure, easy and simple to handle, do not influence advantages such as the original function of bearing seal, very showing to the help that reduces shipbuilding quality risk, guarantees boats and ships node of launching.

As shown in fig. 2, in this embodiment, the arc group includes a concentric arc 412 concentric with the outer profile 411, and a first eccentric arc 413 and a second eccentric arc 414 eccentric with respect to the outer profile 411, the concentric arc 412, the first eccentric arc 413, and the second eccentric arc 414 are sequentially connected end to form a quasi-circular profile, so as to implement three-stage adjustment of the installation eccentricity of the shaft seal, when the eccentricity adjustment is not needed, the sealing assembly 500 is abutted to the concentric arc 412, and when the eccentricity adjustment is needed, the size of the eccentricity that can be adjusted is selected to abut to the first eccentric arc 413 and the second eccentric arc 414.

To facilitate better adjustment of the position of the seal assembly 500, the intersection between the concentric circular arc 412, the first eccentric circular arc 413, and the second eccentric circular arc 414 is smoothly transitioned.

In this embodiment, the center of the concentric circular arc 412 is located at the center of the outer contour 411, and the centers of the first eccentric circular arc 413 and the second eccentric circular arc 414 are located on two trisections of the outer contour 411, respectively, it can also be understood that the centers of the concentric circular arc 412, the first eccentric circular arc 413 and the second eccentric circular arc 414 are located on three trisections of the outer contour 411 by different eccentric amounts, respectively, except that the concentric circular arc 412 and the outer contour 411 are the same center, and the concentric circular arc 412, the first eccentric circular arc 413 and the second eccentric circular arc 414 naturally intersect to form a similar circular contour, so that different circular arcs can be positioned and abutted, and smooth transition of intersection points is facilitated.

In this embodiment, a distance X1 between the center of the concentric circular arc 412 and the center of the first eccentric circular arc 413 is smaller than a distance X2 between the center of the concentric circular arc 412 and the center of the second eccentric circular arc 414, that is, X1 is smaller than X2, that is, the eccentric amount of the second eccentric circular arc 414 is larger than that of the first eccentric circular arc 413, so as to achieve adjustment of different eccentric amounts, and a specific value is determined by different axial degree requirements of a specific type of shaft seal.

Further, the arc length of the concentric arc 412 is smaller than that of the first eccentric arc 413, the arc length of the first eccentric arc 413 is smaller than that of the second eccentric arc 414, and the arc length of the second eccentric arc 414 with a large eccentric amount needs to be the longest to ensure that the sealing assembly 500 is completely abutted against the second eccentric arc 414, so as to ensure effective eccentric adjustment, and the concentric arc 412 with an eccentric amount of 0 can be abutted against the sealing assembly 500 at any position, so that the required arc length is also the shortest.

As shown in fig. 2 and 5, in the present embodiment, the adjusting ring 410 is provided with positioning holes 415 penetrating between the outer contour 411 and the inner contour, the positioning element 420 is in threaded connection with the positioning holes 415, so as to adjust the positioning element 420 from the outer contour 411 of the adjusting ring 410, the sealing element 500 abuts against the opposite circular arcs by rotating the positioning element 420 to abut against the sealing element 500, the number of the positioning holes 415 is 6, the positioning holes 415 are distributed on the adjusting ring 410 in a circular array, and the first positioning hole 415 is located on a center line of the concentric circular arcs 412, wherein the positioning element 420 employs an existing jackscrew.

In the present embodiment, the adjusting ring 410 is provided with a positioning groove 416 at a side thereof, and the sealing assembly 500 is provided with a locking block (not shown) abutting against the positioning groove 416, so as to position the adjusting ring 410.

As shown in fig. 2 to 4, in the present embodiment, the adjusting ring 410 is composed of a first half ring 417 and a second half ring 418, a locking bolt 430 and a positioning pin 440 are disposed between the first half ring 417 and the second half ring 418, an axial direction of the locking bolt 430 is not parallel to an axial direction of the positioning pin 440, the adjusting ring 410 is divided into a first half ring 417 and a second half ring 418, the installation is simple, and the locking bolt 430 and the positioning pin 440 are used for fixing, and the locking bolt 430 is perpendicular to a connecting end surface of the first half ring 417 or the second half ring 418, so that the locking bolt 430, the positioning pin 440 and the connecting end surface form a triangular structure, which has a stabilizing effect, and prevents the first half ring 417 and the second half ring 418 from being misaligned to affect the eccentric adjustment of the adjusting ring 410.

Wherein, one end of the first half ring 417 and one end of the second half ring 418 are respectively provided with a mounting groove 419 for mounting the locking bolt 430 and the positioning pin 440.

In this embodiment, the seal assembly 500 includes a seal 510 abutting against the rotating shaft 100 and a housing 520 for mounting the seal 510, the housing 520 and the distance ring 300 are fixed on the mounting seat 200 by a fastener, specifically, the mounting axis of the adjusted seal assembly 500 is the mounting axis of the adjusted housing 520, the seal 510 has a sealing effect on the rotating shaft 100, and after the housing 520 is eccentrically adjusted, the housing 520 is fixed by the fastener.

The eccentric adjustment principle of the adjustment ring 410: according to the eccentric size and direction of the axes of the stop of the rotating shaft 100 and the distance ring 300, selecting an arc with proper eccentric amount as an installation stop, pressing the positioning groove 416 at the top of the arc into a fixture block closest to the eccentric direction, and finally screwing down a jackscrew opposite to the positioning groove 416. The eccentric adjustment of the shaft seal housing 520 relative to the axis is completed by the above-mentioned procedure.

In summary, the embodiment of the present invention provides a shaft seal device, wherein the adjusting ring 410 is installed between the distance ring 300 of the shaft seal and the installation seam allowance of the housing 520 of the shaft seal, the outer contour 411 is attached to the installation seam allowance of the distance ring 300, the inner contour is attached to the installation seam allowance of the housing 520, the eccentric adjusting ring 410 utilizes the structural size margin in the radial direction of the installation seam allowance of the original shaft seal housing 520, and the installation space of the eccentric adjusting ring 410 is obtained by enlarging the diameter of the seam allowance of the installation housing 520 under the condition of keeping the diameter of the seam allowance of the distance ring 300 unchanged. The arc sections with different eccentric amounts are used as the inner spigot of the eccentric adjusting ring 410 by adjusting the circumferential angle of the installation of the eccentric adjusting ring 410, so that the eccentric three-stage adjustment of shaft seal installation is realized on the premise of not influencing the original function of the shaft seal, and the problem that the coaxiality of the shaft seal installation does not reach the standard is solved. Compared with the complex rectification procedure in the prior art, the invention has the advantages of simple structure, simple and convenient operation, no influence on the original function of the shaft seal and the like for solving the problem that the coaxiality of the shaft seal installation does not reach the standard. The method has obvious help for reducing the shipbuilding quality risk and ensuring the ship launching node. The evaluation from the aspects of design concept and expected effect has advancement and has wide popularization prospect.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.