阅读说明：本技术 一种卧式离心机主轴密封装置 (Spindle sealing device of horizontal centrifuge ) 是由 顾逸 顾根生 高锐 许关红 丁荣 于 2020-11-04 设计创作，主要内容包括：本发明提供一种卧式离心机主轴密封装置,涉及固液分离机械领域,包括主轴、轴承座和主轴外侧固定安装的转鼓,主轴转动安装在轴承座的内部,轴承座的前端固定安装有压盖,压盖的内侧和主轴之间设置有护套,压盖的内部设置有气胀密封圈,所述护套与压盖之间设有若干径向设孔的隔圈,隔圈端面设有密封圈,压盖内部设置有连通到隔圈的第一通路。本发明通过气胀密封圈的设置,当进气口通入一定压力的气体进入到气胀密封圈内部后,使得气胀密封圈膨胀并与护套抱死形成密封,本发明确保离心机在工作状态下或离心机内增大压力或抽负压时主轴密封状态良好,具有结构简单、操作简便、密封可靠等优点。(The invention provides a spindle sealing device of a horizontal centrifuge, which relates to the field of solid-liquid separation machinery and comprises a spindle, a bearing seat and a rotary drum fixedly arranged on the outer side of the spindle, wherein the spindle is rotatably arranged in the bearing seat, a gland is fixedly arranged at the front end of the bearing seat, a sheath is arranged between the inner side of the gland and the spindle, an inflatable sealing ring is arranged in the gland, a plurality of spacer rings with holes arranged in the radial direction are arranged between the sheath and the gland, a sealing ring is arranged on the end surface of the spacer ring, and a first passage communicated with the spacer ring is arranged in the. According to the invention, through the arrangement of the inflatable sealing ring, when gas with certain pressure is introduced into the inflatable sealing ring from the gas inlet and enters the inflatable sealing ring, the inflatable sealing ring is expanded and locked with the sheath to form sealing.)

1. The utility model provides a horizontal centrifuge main shaft sealing device, includes main shaft (1), bearing frame (2) and main shaft (1) outside fixed mounting's rotary drum (18), main shaft (1) is rotated and is installed the inside in bearing frame (2), the front end fixed mounting of bearing frame (2) has gland (3), be provided with sheath (4) between the inboard of gland (3) and main shaft (1), be provided with bearing (9), its characterized in that on main shaft (1) the lateral wall that is close to the right-hand member: an inflatable sealing ring (5) is arranged inside the gland (3), an inner cover plate (7) is arranged between the inflatable sealing ring (5) and the gland (3), a plurality of spacer rings (8) with holes arranged in the radial direction are arranged between the sheath (4) and the gland (3), a sealing ring (6) is arranged on the end face of each spacer ring (8), a first passage (13) communicated with the spacer rings (8) is arranged inside the gland (3), an air inlet pipe (15) is arranged inside the bearing seat (2), and the air inlet pipe (15) is communicated with the first passage (13);

the right side of the inflatable sealing ring (5) is provided with an air inlet (17), and the air inlet (17) is communicated with the inside of the cavity of the inflatable sealing ring (5).

2. The horizontal centrifuge main shaft sealing device according to claim 1, wherein: a second passage (14) communicated to the space ring (8) is arranged inside the gland (3), a leakage detecting pipe (16) is arranged inside the bearing seat (2), and the leakage detecting pipe (16) is communicated with the second passage (14).

3. A horizontal centrifuge main shaft sealing device according to claim 1 or 2, wherein: an oil baffle ring (10) is fixedly arranged on the inner side wall of the bearing (9), the oil baffle ring (10) is connected with the sheath (4) through a cylindrical pin (11), and a spring (12) is arranged between the oil baffle ring (10) and the sheath (4).

4. The horizontal centrifuge main shaft sealing device according to claim 1, wherein: sealing washer (6) and inflatable seal circle (5) are fixed irrotational in gland (3) inside, be rotary friction between sealing washer (6) and sheath (4).

Technical Field

The invention relates to the field of solid-liquid separation machinery, in particular to a spindle sealing device of a horizontal centrifuge.

Background

The centrifugal machine is a device for realizing solid-liquid separation by utilizing centrifugal force, is widely used in the fields of pharmacy and chemical industry, is mostly used in the occasions with strong corrosivity, flammability and explosiveness, is used as a moving device for high-speed rotation, and has important reliability of main shaft sealing.

At present, most centrifuges adopt labyrinth type sealing or contact type lip-shaped sealing rings for sealing in a non-contact mode, but in the working occasions with high pressure in the centrifuges, the sealing cannot be well and stably used. Especially when positive pressure or negative pressure is required in the machine, the sealing can not achieve the effect of process design.

Disclosure of Invention

The invention aims to provide a spindle sealing device of a horizontal centrifuge, which aims to solve the technical problem.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a horizontal centrifuge main shaft sealing device, includes main shaft, bearing frame and main shaft outside fixed mounting's rotary drum, the main shaft rotates and installs the inside at the bearing frame, the front end fixed mounting of bearing frame has the gland, be provided with the sheath between the inboard of gland and the main shaft, the main shaft is close to and is provided with bearing, its characterized in that on the lateral wall of right-hand member: an inflatable sealing ring is arranged inside the gland, an inner cover plate is arranged between the inflatable sealing ring and the gland, a plurality of space rings with holes arranged in the radial direction are arranged between the sheath and the gland, the sealing ring is arranged on the end face of each space ring, a first passage communicated with the space rings is arranged inside the gland, an air inlet pipe is arranged inside the bearing seat, and the air inlet pipe is communicated with the first passage;

the right side of the inflatable sealing ring is provided with an air inlet, and the air inlet is communicated to the inside of the cavity of the inflatable sealing ring.

Preferably, a second passage communicated to the space ring is arranged in the gland, a leakage detecting pipe is arranged in the bearing seat, and the leakage detecting pipe is communicated with the second passage.

Preferably, an oil retaining ring is fixedly arranged on the inner side wall of the bearing, the oil retaining ring is connected with the sheath (4) through a cylindrical pin, and a spring is arranged between the oil retaining ring and the sheath.

Preferably, the sealing ring and the inflatable sealing ring are fixed and do not rotate inside the gland, and the rotating friction is formed between the sealing ring and the sheath.

The invention has the beneficial effects that:

according to the invention, through the arrangement of the rotary drum and the main shaft, when the pressure in the centrifuge needs to be increased or the negative pressure is pumped, and under the condition that the rotary components such as the rotary drum, the main shaft and the like are completely stopped, through the arrangement of the inflatable sealing ring, after gas with certain pressure is introduced into the inflatable sealing ring from the gas inlet, the inflatable sealing ring is expanded and locked with the sheath to form sealing, after the internal pressure of the centrifuge is normal, the gas in the inflatable sealing ring is discharged, the centrifuge can normally rotate and separate to work, the oil baffle ring is arranged, lubricating oil flowing from the bearing end can be blocked, most of the lubricating oil flows out through the oil return hole, and through the arrangement of the leakage detection pipe, whether liquid enters between the sealing rings or not can be detected Reliable sealing and the like.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of portion B of FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of portion C of FIG. 1 according to the present invention;

reference numerals: 1. a main shaft; 2. a bearing seat; 3. a gland; 4. a sheath; 5. a gas expansion seal ring; 6. a seal ring; 7. an inner cover plate; 8. a space ring; 9. a bearing; 10. an oil baffle ring; 11. a cylindrical pin; 12. a spring; 13. a first path; 14. a second path; 15. an air inlet pipe; 16. a leakage detecting pipe; 17. an air inlet; 18. and (4) rotating the drum.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1-4, a horizontal centrifuge main shaft sealing device includes a main shaft 1, a bearing seat 2 and a rotary drum 18 fixedly mounted on the outer side of the main shaft 1, wherein the main shaft 1 is rotatably mounted inside the bearing seat 2, a gland 3 is fixedly mounted at the front end of the bearing seat 2, a sheath 4 is arranged between the inner side of the gland 3 and the main shaft 1, a bearing 9 is arranged on the outer side wall of the main shaft 1 near the right end, an inflatable sealing ring 5 is arranged inside the gland 3, an inner cover plate 7 is arranged between the inflatable sealing ring 5 and the gland 3, a plurality of spacer rings 8 with radially arranged holes are arranged between the sheath 4 and the gland 3, a sealing ring 6 is arranged on the end surface of the spacer ring 8, a first passage 13 communicated with the spacer ring 8 is arranged inside the gland 3, an air inlet pipe 15 is arranged inside the bearing seat 2, and;

the right side of the inflatable sealing ring 5 is provided with an air inlet 17, and the air inlet 17 is communicated with the inside of the cavity of the inflatable sealing ring 5.

The working principle is as follows:

when the device normally rotates to work, the sheath 4 and the bearing 9 synchronously rotate in the bearing seat 2, the end face of the sheath 4 is tightly pressed against the bottom of the rotary drum 18 under the action of the pre-tightening force of the spring 12, the sealing ring 6 and the inflatable sealing ring 5 are fixed and do not rotate in the gland 3, and a rotary friction pair is arranged between the sealing ring 6 and the sheath 4 to block the side of the rotary drum 18 and the side of the bearing 9; gas with certain pressure is introduced from the gas inlet pipe 15 and enters the space between the sealing rings 6 through the first passage 13 and the spacer ring 8, so that a gas cavity with certain micro-positive pressure exists at the position, and the auxiliary sealing effect is achieved. When the pressure in the centrifuge needs to be increased or the pressure in the centrifuge needs to be reduced, firstly, all rotating parts such as the rotary drum 18 and the main shaft 1 are stopped, gas with certain pressure is introduced from the gas inlet 17 and enters the inflatable sealing ring 5, so that the inflatable sealing ring expands and is locked with the sheath 4 to form a seal, the pressure of the inflatable sealing ring is generally not more than 120% of the pressure in the centrifuge or the atmospheric pressure, and the pressurization or the negative pressure pumping work in the centrifuge can be performed at this time. After the completion, the gas inside the exhaust gas expansion seal ring 5 can be recovered, and the rotation work can be carried out.

Further, a second passage 14 communicated with the space ring 8 is arranged in the gland 3, a leakage detecting pipe 16 is arranged in the bearing seat 2, and the leakage detecting pipe 16 is communicated with the second passage 14. The leak detection tube 16 communicates with the two sealing rings 6 via the second passage 14, and if the seal leaks with liquid, it can be visually observed through the leak detection tube 16.

Further, an oil retaining ring 10 is fixedly arranged on the inner side wall of the bearing 9, the oil retaining ring 10 is connected with the sheath 4 through a cylindrical pin 11, and a spring 12 is arranged between the oil retaining ring 10 and the sheath 4. The oil baffle ring 10 rotates synchronously with the main shaft under the action of the cylindrical pin 11, and the oil baffle ring 10 blocks most of the lubricating oil flowing from the bearing 9 end to flow out through the oil return hole.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.