阅读说明：本技术 一种水下航行器螺旋桨转轴的静密封结构 (Static sealing structure of propeller rotating shaft of underwater vehicle ) 是由 吴琪 王晋忠 康新华 康宝臣 关静岩 杨秀芳 丁继伟 任冬丽 黄登高 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种水下航行器螺旋桨转轴的静密封结构,解决了水下航行器螺旋桨的动密封存在结构复杂和安装拆卸不方便的问题。将伸出到水下航行器艉部法兰外侧的螺旋桨驱动轴的轴端,通过无磁密封圆桶(4)密封在桶内,无磁密封桶与水下航行器艉部法兰之间,是采用静密封的方式进行密封的,在螺旋桨驱动轴轴端(3)上套接磁性N极内套筒(7),将螺旋桨桨毂(9)活动套接在无磁密封圆桶的外侧圆柱面上,在螺旋桨桨毂的孔内设置有磁性S极外套筒(11),当磁性N极内套筒随螺旋桨驱动轴轴端(3)旋转时,通过N极磁性内套筒与磁性S极外套筒的磁力传递,使螺旋桨桨毂及桨叶也跟随旋转,实现了电机输出轴与螺旋桨之间转动力矩的传递。(The invention discloses a static sealing structure of a rotating shaft of a propeller of an underwater vehicle, which solves the problems of complex structure and inconvenient installation and disassembly of a dynamic seal of the propeller of the underwater vehicle. The end of a propeller driving shaft extending out of the outer side of a stern flange of an underwater vehicle is sealed in a barrel through a non-magnetic sealing barrel (4), the non-magnetic sealing barrel is sealed with the stern flange of the underwater vehicle in a static sealing mode, a magnetic N pole inner sleeve (7) is sleeved on the end (3) of the propeller driving shaft, a propeller hub (9) is movably sleeved on the outer side cylindrical surface of the non-magnetic sealing barrel, a magnetic S pole outer sleeve (11) is arranged in a hole of the propeller hub, and when the magnetic N pole inner sleeve rotates along with the end (3) of the propeller driving shaft, the propeller hub and blades rotate along with the propeller driving shaft through the magnetic force transmission of the N pole magnetic inner sleeve and the magnetic S pole outer sleeve, so that the transmission of the rotating torque between a motor output shaft and the propeller is realized.)

1. A static sealing structure of a propeller rotating shaft of an underwater vehicle comprises a stern flange (1) of the underwater vehicle, a propeller driving shaft (3) of the underwater vehicle, a propeller hub (9), a magnetic N-pole inner sleeve (7), a magnetic S-pole outer sleeve (11) and a non-magnetic sealing cylindrical barrel body (4), wherein an annular eave (15) is arranged on a barrel opening of the non-magnetic sealing cylindrical barrel body (4), blades (10) are arranged on the propeller hub (9), a ball rolling bearing (2) is arranged in the stern flange (1), the propeller driving shaft (3) is arranged in the ball rolling supporting bearing (2), the static sealing structure is characterized in that the non-magnetic sealing cylindrical barrel body (4) is buckled on an outer side hole of the stern flange (1), the annular eave (15) arranged on the barrel opening of the stern flange (4) is arranged between the outer end face of the outer side hole of the stern flange (1), an O-shaped sealing ring (5) is arranged, an annular eave (15) and a stern flange (1) are fixedly connected together through a connecting bolt (6), a shaft tail end (16) on a propeller driving shaft (3) is arranged in a non-magnetic sealing cylindrical barrel body (4), a magnetic N-pole inner sleeve (7) is sleeved on the shaft tail end (16), and an annular inner gap (8) is arranged between the magnetic N-pole inner sleeve (7) and the inner side wall of the non-magnetic sealing cylindrical barrel body (4); a hub cap (13) is connected to the outer side face of the bottom of the non-magnetic sealed cylindrical barrel body (4), a propeller hub (9) is movably sleeved on a barrel body of the non-magnetic sealed cylindrical barrel body (4) between the hub cap (13) and an annular brim (15), a magnetic S-pole outer sleeve (11) is embedded in the inner wall of a hole of the propeller hub (9), the magnetic S-pole outer sleeve (11) is sleeved on the barrel body of the non-magnetic sealed cylindrical barrel body (4), and an annular outer gap (12) is formed between the inner side wall of the magnetic S-pole outer sleeve (11) and the outer side wall of the barrel body of the non-magnetic sealed cylindrical barrel body (4).

2. The static seal structure of the propeller shaft of the underwater vehicle is characterized in that a hub cap (13) is connected to the bottom of the nonmagnetic seal cylindrical barrel body (4) through a hub cap screw (14); a limit screw plug (17) is arranged on the side surface of the tail end of the shaft tail end (16).

Technical Field

The invention relates to a static sealing structure, in particular to a static sealing structure of a propeller rotating shaft of an underwater vehicle.

Background

The propeller rotating shaft seal of the underwater vehicle generally adopts a dynamic seal structure, and a plurality of radial and axial seal rings are arranged at the rotating shaft and the end face flange of the stern part so as to realize the water seal of a stern shaft; after the propeller of the underwater vehicle sails for a long time, the abrasion phenomenon of the sealing ring often occurs, the sealing effect is influenced, and the sealing ring needs to be maintained and replaced regularly; the friction between the screw shaft and the sealing ring can also increase the load of the motor, so that the rotating speed of the propeller is reduced, and the propulsion efficiency is reduced; in addition, the dynamic seal of the underwater vehicle propeller has the defects of complex structure, inconvenient installation and disassembly and higher requirement on the coaxiality of installation.

Disclosure of Invention

The invention provides a static sealing structure of a rotating shaft of a propeller of an underwater vehicle, which solves the technical problems of complex structure and inconvenient installation and disassembly of a dynamic seal of the propeller of the underwater vehicle.

The invention solves the technical problems by the following technical scheme:

the general concept of the invention is as follows: the shaft end of a propeller driving shaft extending out of the outer side of a stern flange of an underwater vehicle is sealed in a barrel through a non-magnetic sealing barrel, the non-magnetic sealing barrel is sealed with the stern flange of the underwater vehicle in a static sealing mode, a magnetic N-pole inner sleeve is sleeved on the shaft end of the propeller driving shaft, a propeller hub is movably sleeved on the outer side cylindrical surface of the non-magnetic sealing barrel, a magnetic S-pole outer sleeve is arranged in a hole of the propeller hub, and when the magnetic N-pole inner sleeve rotates along with the shaft end of the propeller driving shaft, the propeller hub and blades also rotate along with the propeller, so that the transmission of the rotating torque between a motor output shaft and the propeller is realized.

A static sealing structure of a propeller rotating shaft of an underwater vehicle comprises a stern flange of the underwater vehicle, a propeller driving shaft of the underwater vehicle, a propeller hub, a magnetic N-pole inner sleeve, a magnetic S-pole outer sleeve and a nonmagnetic sealing cylindrical barrel body, wherein an annular brim is arranged on a barrel mouth of the nonmagnetic sealing cylindrical barrel body, blades are arranged on the propeller hub, a ball rolling bearing is arranged in the stern flange, the propeller driving shaft is arranged in the ball rolling supporting bearing, the nonmagnetic sealing cylindrical barrel body is buckled on an outer side hole of the stern flange, an O-shaped sealing ring is arranged between the annular brim arranged on the barrel mouth of the nonmagnetic sealing cylindrical barrel body and the outer end face of the outer side hole of the stern flange, a connecting bolt fixedly connects the annular brim and the stern flange together, and the shaft tail end on the propeller driving shaft is arranged in the nonmagnetic sealing cylindrical barrel body, a magnetic N-pole inner sleeve is sleeved at the tail end of the shaft, and an annular inner gap is formed between the magnetic N-pole inner sleeve and the inner side wall of the nonmagnetic sealed cylindrical barrel body; the outer side surface of the bottom of the nonmagnetic sealed cylindrical barrel body is connected with a hub cap, a propeller hub is movably sleeved on a barrel body of the nonmagnetic sealed cylindrical barrel body between the hub cap and an annular brim, a magnetic S-pole outer sleeve is embedded in the inner wall of a hole of the propeller hub and sleeved on the barrel body of the nonmagnetic sealed cylindrical barrel body, and an annular outer gap is formed between the inner side wall of the magnetic S-pole outer sleeve and the outer side wall of the barrel body of the nonmagnetic sealed cylindrical barrel body.

The hub cap is connected to the bottom of the nonmagnetic sealed cylindrical barrel body through a hub cap screw; the side surface of the tail end of the shaft tail end is provided with a limit screw plug.

The stern shaft sealing structure utilizes magnetic coupling for transmission, adopts O-shaped ring static sealing for stern shaft sealing, and is simple in structure and convenient to install; the O-shaped ring static seal is adopted to replace a dynamic seal structure, so that the abrasion phenomenon of the seal ring is avoided, and the maintenance is convenient; the magnetic coupling is adopted to transmit the torque between the motor rotating shaft and the propeller hub, so that redundant load caused by friction cannot be generated, and the propulsion efficiency is not reduced.

Drawings

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

Detailed Description

The invention is described in detail below with reference to the accompanying drawings:

a static sealing structure of a propeller rotating shaft of an underwater vehicle comprises a stern flange 1 of the underwater vehicle, a propeller driving shaft 3 of the underwater vehicle, a propeller hub 9, a magnetic N-pole inner sleeve 7, a magnetic S-pole outer sleeve 11 and a non-magnetic sealing cylindrical barrel body 4, wherein an annular eave 15 is arranged on a barrel mouth of the non-magnetic sealing cylindrical barrel body 4, blades 10 are arranged on the propeller hub 9, a ball rolling bearing 2 is arranged in the stern flange 1, the propeller driving shaft 3 is arranged in the ball rolling supporting bearing 2, the non-magnetic sealing cylindrical barrel body 4 is buckled on an outer side hole of the stern flange 1, an O-shaped sealing ring 5 is arranged between the annular eave 15 arranged on the barrel mouth of the non-magnetic sealing cylindrical barrel body 4 and the outer end face of the outer side hole of the stern flange 1, a connecting bolt 6 fixedly connects the annular eave 15 and the stern flange 1 together, the shaft tail end 16 of the propeller driving shaft 3 is arranged in the non-magnetic sealed cylindrical barrel body 4, the magnetic N-pole inner sleeve 7 is sleeved on the shaft tail end 16, and an annular inner gap 8 is arranged between the magnetic N-pole inner sleeve 7 and the inner side wall of the non-magnetic sealed cylindrical barrel body 4; a hub cap 13 is connected to the outer side surface of the bottom of the nonmagnetic sealed cylindrical barrel body 4, a propeller hub 9 is movably sleeved on the barrel body of the nonmagnetic sealed cylindrical barrel body 4 between the hub cap 13 and an annular brim 15, a magnetic S-pole outer sleeve 11 is embedded in the inner wall of a hole of the propeller hub 9, the magnetic S-pole outer sleeve 11 is sleeved on the barrel body of the nonmagnetic sealed cylindrical barrel body 4, and an annular outer gap 12 is arranged between the inner side wall of the magnetic S-pole outer sleeve 11 and the outer side wall of the barrel body of the nonmagnetic sealed cylindrical barrel body 4.

The hub cap 13 is connected to the bottom of the non-magnetic sealed cylindrical barrel body 4 through a hub cap screw 14; a limit screw plug 17 is arranged on the side surface of the tail end of the shaft tail end 16; the cooperation of the non-magnetic sealing cylindrical barrel body 4 and the O-shaped sealing ring 5 realizes the static sealing of the stern shaft part, the magnetic N pole inner sleeve 7 is used as an N magnetic pole, and the magnetic S pole outer sleeve 11 is used as an S magnetic pole, so that the transmission of the rotating torque between the motor output shaft and the propeller is realized.