CN219866255U

CN219866255U - Rotating shaft sealing device and reactor

Info

Publication number: CN219866255U
Application number: CN202321297414.6U
Authority: CN
Inventors: 毛伟; 胡双伟; 满洪利; 耿东方; 苏军龙; 胡满江; 曹帅帅; 党利强; 贾旭飞
Original assignee: Guoneng Yulin Chemical Co ltd; China Shenhua Coal to Liquid Chemical Co Ltd
Current assignee: Guoneng Yulin Chemical Co ltd; China Shenhua Coal to Liquid Chemical Co Ltd
Priority date: 2023-05-25
Filing date: 2023-05-25
Publication date: 2023-10-20
Anticipated expiration: 2033-05-25

Abstract

The utility model discloses a rotating shaft sealing device and a reactor, wherein the rotating shaft sealing device comprises a shaft sleeve, and the shaft sleeve is sleeved on the periphery of a rotating shaft and rotates along with the rotating shaft; the lip-shaped sealing ring is arranged between the shaft sleeve and the fixing piece, and a first air sealing cavity is formed between the shaft sleeve and the lip-shaped sealing ring; the dry sealing piece is arranged between the shaft sleeve and the fixing piece and is positioned at one axial side of the lip-shaped sealing ring, a second air sealing cavity is formed between the dry sealing piece and the shaft sleeve, and the second air sealing cavity is communicated with the first air sealing cavity. According to the utility model, the shaft sleeve is arranged on the rotating shaft, the lip-shaped sealing ring and the dry-type sealing piece are arranged between the shaft sleeve and the fixing piece plate, and the first air sealing cavity formed between the lip-shaped sealing ring and the shaft sleeve is communicated with the second air sealing cavity formed between the dry-type sealing piece and the shaft sleeve, so that air can be simultaneously introduced into the first air sealing cavity and the second air sealing cavity to form air sealing. Simultaneously, two sealing structures are adopted for sealing, so that the sealing effect is better.

Description

Rotating shaft sealing device and reactor

Technical Field

The utility model relates to a sealing device, in particular to a rotating shaft sealing device and a reactor.

Background

The reactor is an important device in the production of chemical products, an axial paddle stirrer is arranged in a horizontal reactor, and a baffle plate is required to be arranged in the reactor due to the structure of the horizontal reactor, so that the floating end and the stirring end of the stirrer are separated to prevent fine powder and process gas in the reactor from entering the floating end enclosure. Since the stirrer rotates relative to the partition plate when the reactor is in operation, a sealing means is required between the partition plate and the stirrer shaft in order to improve the sealing property.

At present, a lip-shaped sealing ring is adopted as a sealing device between a baffle plate and a stirrer, the lip-shaped sealing ring has certain flexibility, the rotation of a stirring shaft is not affected, and meanwhile, the lip-shaped sealing ring is blown by air flow, so that 360-degree blowing can be formed on the lip-shaped sealing ring, and powder and the like in the reactor are prevented from flowing into a floating end. However, the lip seal is made of rubber, so that the lip seal is easy to wear, has short service life and needs to be replaced frequently, otherwise, the reactor is easy to break down.

Disclosure of Invention

The utility model aims to overcome the defect that the sealing between a rotating shaft and a partition plate is easy to fail in the prior art, and provides a rotating shaft sealing device and a reactor with high sealing stability.

The technical scheme of the utility model provides a rotating shaft sealing device, which is used for being arranged between a rotating shaft and a fixing piece arranged outside the rotating shaft, wherein the rotating shaft rotates relative to the fixing piece;

the rotating shaft sealing device comprises

The shaft sleeve is sleeved on the periphery of the rotating shaft and rotates along with the rotating shaft;

the lip-shaped sealing ring is arranged between the shaft sleeve and the fixing piece, and a first air sealing cavity is formed between the shaft sleeve and the lip-shaped sealing ring;

the dry type sealing piece is arranged between the shaft sleeve and the fixing piece and is positioned on one axial side of the lip-shaped sealing ring, a second air sealing cavity is formed between the dry type sealing piece and the shaft sleeve, and the second air sealing cavity is communicated with the first air sealing cavity.

Further, the dry seal includes

The movable ring is arranged on the periphery of the shaft sleeve and rotates along with the rotating shaft;

the sealing seat is arranged on the fixing piece, and a gap is reserved between the sealing seat and the shaft sleeve;

the static ring is arranged on the periphery of the sealing seat, and one end of the static ring is abutted with the movable ring;

the elastic piece is arranged on the sealing seat, and the elastic piece is abutted between the static ring and the sealing seat and used for pushing the static ring towards the dynamic ring.

Further, the lip seal ring is mounted at an end of the seal seat remote from the moving ring.

Further, the stationary ring comprises

The connecting ring is abutted with the elastic piece;

and one end of the sealing ring is connected with the connecting ring through an anti-rotation pin, and the other end of the sealing ring is abutted with the movable ring.

Further, an annular baffle plate extends out of the peripheral edge of the connecting ring along the axial direction, and a second installation space is formed between the sealing seat and the annular baffle plate;

one end of the sealing ring is installed in the second installation space, and the other end of the sealing ring extends out of the sealing seat and is abutted with the movable ring.

Further, a first air passage is formed in the fixing piece, and a second air passage is formed in the sealing seat;

the first air passage is communicated with the second air passage, and the second air passage is communicated with the second air seal cavity.

The technical proposal of the utility model also provides a reactor, which is characterized by comprising

A reactor housing;

the stirring shaft is arranged in the reactor shell and comprises a floating end and a stirring end, and the floating end is provided with a positioning bearing;

the baffle plate is arranged on the stirring shaft and is used for separating the floating end and the stirring end;

a shaft seal as hereinbefore described mounted between the stirring shaft and the partition.

Further, the reactor also comprises a gas supply unit, wherein the gas supply unit comprises a gas supply pipeline formed by sequentially connecting a gas inlet pipe, a filter, a check valve and a gas outlet pipe, and a differential pressure meter connected in parallel with two ends of the filter, and the gas outlet pipe is communicated with the second gas seal cavity.

Further, the gas supply unit further comprises a pressure regulating valve, a flow transmitter, a pressure control member and a flow control member;

the pressure regulating valve and the flow transmitter are connected in series in the air supply pipeline, the pressure control piece is electrically connected with the pressure regulating valve, and the flow control piece is electrically connected with the flow transmitter.

Further, the gas supply unit further includes

The first valve and the second valve are connected in series at two ends of the filter;

the third valve is connected in parallel with the two ends of the filter, the first valve and the second valve;

and the two fourth valves are connected in series between the filter and the differential pressure meter and are respectively connected with two ends of the filter.

After the technical scheme is adopted, the method has the following beneficial effects:

according to the rotating shaft sealing device, the shaft sleeve is arranged on the rotating shaft, the lip-shaped sealing ring and the dry-type sealing piece are arranged between the shaft sleeve and the fixing piece plate, the first air sealing cavity formed between the lip-shaped sealing ring and the shaft sleeve is communicated with the second air sealing cavity formed between the dry-type sealing piece and the shaft sleeve, and air can be simultaneously introduced into the first air sealing cavity and the second air sealing cavity to form air sealing. Simultaneously, two sealing structures are adopted for sealing, so that the sealing effect is better.

Drawings

The present disclosure will become more readily understood with reference to the accompanying drawings. It should be understood that: the drawings are for illustrative purposes only and are not intended to limit the scope of the present utility model. In the figure:

FIG. 1 is an overall cross-sectional view of a rotary seal device in accordance with one embodiment of the present utility model;

FIG. 2 is a schematic view showing the structure of a reactor in an embodiment of the present utility model;

fig. 3 is a schematic view showing a structure of a gas supply unit in an embodiment of the present utility model.

Reference numeral control table:

a rotating shaft 01;

fixing member 02: a baffle 21 and a first air passage 22;

shaft sleeve 03: a first air-tight chamber 31, a second air-tight chamber 32, and a flange 33;

a lip seal ring 04;

dry seal 05: the movable ring 51, the seal seat 52, the second air passage 521, the stationary ring 53, the connecting ring 531, the seal ring 532, the anti-rotation pin 533, the elastic member 54, the transmission pin 55;

a reactor housing 06;

stirring shaft 07: a floating end 71 and a stirring end 72;

positioning bearing 08, spacer 09, shaft seal 010, air inlet tube 011, filter 012, check valve 013, air outlet tube 014, differential pressure gauge 015, pressure regulating valve 016, flow transmitter 017, flow control 018, pressure transmitter 019, pressure controller 020, first valve 021, second valve 022, third valve 023, fourth valve 024.

Detailed Description

Specific embodiments of the present utility model will be further described below with reference to the accompanying drawings.

It is to be readily understood that, according to the technical solutions of the present utility model, those skilled in the art may replace various structural modes and implementation modes with each other without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to limit or restrict the utility model in its entirety or to apply for the utility model.

Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two components. The above-described specific meanings belonging to the present utility model are understood as appropriate by those of ordinary skill in the art.

Rotating shaft sealing device:

the rotating shaft sealing device in the embodiment of the utility model is used for being arranged between the rotating shaft 01 and the fixing piece 02 sleeved outside the rotating shaft 01, the rotating shaft 01 rotates relative to the fixing piece 02, and the rotating shaft sealing device is used for sealing a gap between the outer peripheral surface of the rotating shaft 01 and the fixing piece 02.

As shown in fig. 1, the shaft sealing device includes

The shaft sleeve 03 is sleeved on the periphery of the rotating shaft 01 and rotates along with the rotating shaft;

a lip seal ring 04, wherein the lip seal ring 04 is arranged between the shaft sleeve 03 and the fixing piece 02, and a first air seal cavity 31 is formed between the shaft sleeve 03 and the lip seal ring 04;

the dry seal 05, the dry seal 05 is installed between axle sleeve 03 and mounting 02, and is located the axial one side of lip seal ring 04, is formed with second air seal chamber 32 between dry seal 05 and the axle sleeve 03, and second air seal chamber 32 communicates with first air seal chamber 31.

Specifically, the lip seal ring 04 and the dry seal 05 are pre-installed on the shaft sleeve 03 along the axial direction, then the shaft sleeve 03 is installed between the rotating shaft 01 and the fixing piece 02, the shaft sleeve 03 is in interference fit with the rotating shaft 01, and a seal ring can be arranged between the shaft sleeve 03 and the rotating shaft 01 to seal so as to ensure the tight connection between the shaft sleeve 03 and the rotating shaft 01, and the shaft sleeve 03 can synchronously rotate along with the rotating shaft.

The lip seal ring 04 is made of rubber material, the inner side surface of the lip seal ring 04 is provided with a groove surrounded by two lips, the inner side surface of the lip seal ring 04 is clung to the outer peripheral surface of the shaft sleeve 03, and a first air seal cavity 31 is formed between the groove and the outer peripheral surface of the shaft sleeve. By introducing gas into the first gas seal chamber 31, a 360 ° purge gas can be formed on the outer peripheral surface of the sleeve 03, thereby preventing powder material from entering the sleeve 03.

The dry seal 05 is matched with the static ring through the movable ring, and gas is introduced into the second gas seal cavity 32 between the dry seal 05 and the shaft sleeve 03 to take away friction heat of the movable ring and the static ring, and meanwhile, a sealing gas film is formed between the movable ring and the static ring, so that a sealing effect is achieved.

In the rotating shaft sealing device provided by the embodiment of the utility model, the lip-shaped sealing ring 04 and the dry-type sealing piece 05 are arranged between the shaft sleeve 03 and the fixing piece 02, and the first air sealing cavity 31 formed between the lip-shaped sealing ring 04 and the shaft sleeve 03 and the second air sealing cavity 32 formed between the dry-type sealing piece 05 and the shaft sleeve 03 are communicated, so that gas can be simultaneously introduced into the first air sealing cavity 31 and the second air sealing cavity 32 to form gas sealing. Simultaneously, two sealing structures are adopted for sealing, so that the sealing effect is better.

In one embodiment, the dry seal 05 comprises

A moving ring 51, the moving ring 51 is installed at the periphery of the shaft sleeve 03 and rotates along with the rotating shaft 01;

the sealing seat 52 is arranged on the fixing piece 02, and a gap is reserved between the sealing seat 52 and the shaft sleeve 03;

a stationary ring 53, the stationary ring 53 being mounted on the outer periphery of the seal seat 52, one end of the stationary ring 53 being in contact with the movable ring 51;

the elastic member 54, the elastic member 54 is installed on the seal seat 52, and the elastic member 54 is abutted between the stationary ring 53 and the seal seat 52 for pushing the stationary ring 53 toward the movable ring 51.

Specifically, the seal seat 52 is fixed on the fixing member by a screw, and the stationary ring 53 and the elastic member 54 are mounted on the seal seat 52 such that the stationary ring 53 and the elastic member 54 remain stationary when the shaft 01 rotates the shaft sleeve 03.

Wherein, the elastic member 54 extends and contracts along the axial direction of the rotating shaft, and a plurality of elastic members 54 may be arranged along the circumferential direction of the rotating shaft 01. The elastic member 54 includes a spring and a spring pin, and the spring is sleeved outside the spring pin. The spring pin is used for limiting the deformation direction of the spring, ensuring the uniform pressure distribution of the spring and avoiding the spring from deforming to a greater extent. The spring pin also limits the expansion length of the spring, and when the contact surface of the movable ring 51 and the static ring 53 is not worn, the static ring 53 is pushed towards the movable ring 51 mainly by the spring pin; after the contact surface of the movable ring 51 and the stationary ring 53 is worn out by the long-time contact, the worn thickness is compensated by the elastic force of the spring. By this arrangement, the service life of the dry seal 05 can be effectively prolonged.

The end of the sleeve 03 is provided with a flange 33 extending in the radial direction, the movable ring 51 is fixed to the side of the flange 33 facing the stationary ring 53 by a plurality of drive pins 55, and the drive pins 55 may be arranged in the circumferential direction of the rotary shaft 01.

In the embodiment of the utility model, the dry sealing element 05 is provided with the movable ring 51 connected with the shaft sleeve 03 and the static ring 53 connected with the fixed element 02, and the elastic element 54 pushes the static ring 53 to abut against the movable ring 51, so that the tight connection between the movable ring 51 and the static ring 53 is ensured, and the sealing effect is realized.

In one embodiment, the lip seal 04 is mounted at the end of the seal seat 52 remote from the moving ring 51.

Specifically, the lip seal 04 is mounted on the end of the seal seat 52, and a seal ring may be mounted between the seal seat 52 and the lip seal 04 to improve the connection tightness. One end of the fixing member 02 is provided with a baffle 21 extending toward the rotation shaft 01, a first installation space is formed between the baffle 21 and the seal seat 52, and the lip seal ring 04 is installed in the first installation space.

Further, the stationary ring 53 includes

A connection ring 531, the connection ring 531 abutting against the elastic member 54;

the seal ring 532, one end of the seal ring 532 is connected to the connecting ring 531 via the rotation preventing pin 533, and the other end abuts against the movable ring 51.

Specifically, the stationary ring 53 is formed by connecting the connection ring 531 and the seal ring 532 via the rotation preventing pin 533. Wherein, the peripheral edge of the connecting ring 531 extends out of the annular baffle plate along the axial direction, and a second installation space is formed between the sealing seat 52 and the annular baffle plate; one end of the seal ring 532 is mounted in the second mounting space, and the other end extends out of the seal seat 52 and abuts against the movable ring 51.

The portion of the sealing ring 532 extending out of the sealing seat 52 is kept with a gap with the shaft sleeve 03, and the end of the sealing ring 532 is abutted against the movable ring 51, so that one end of the gap between the sealing seat 52 and the shaft sleeve 03 is blocked. While the other end of the gap between the seal seat 52 and the sleeve 03 is sealed by the lip seal 04, thereby forming a second air seal chamber 32 between the seal seat 52 and the sleeve 03.

When gas is introduced into the second gas seal chamber 32, the lip of the lip seal ring 04 is blown up by the high-pressure gas so that the gas can enter the first gas seal chamber 31.

Further, the fixing member 02 is provided with a first air passage 22, and the sealing seat 52 is provided with a second air passage 521;

the first air passage 22 communicates with the second air passage 521, and the second air passage 521 communicates with the second air seal chamber 32.

Specifically, the first air passage 22 provided on the fixing member 02 communicates with the second air passage 521 provided on the seal seat 52, so that the air supply device can be connected to the fixing member 02, the air is supplied to the second air seal chamber 32 through the second air passage 521 by the first air passage 22 provided on the fixing member 02, and the air flows from the second air seal chamber 32 to the first air seal chamber 31, thereby realizing the air seal of the lip seal ring 04 and the dry seal 05.

The above technical schemes can be combined according to the need to achieve the best technical effect.

The reactor comprises:

a reactor according to an embodiment of the present utility model, as shown in FIG. 2, comprises

A reactor housing 06;

a stirring shaft 07, the stirring shaft 07 is arranged in the reactor shell 06 and comprises a floating end 71 and a stirring end 72, and the floating end 71 is provided with a positioning bearing 08;

a partition 09, the partition 09 being mounted on the stirring shaft 07 for partitioning the floating end 71 and the stirring end 72;

the rotary shaft sealing device 010 as in any of the foregoing embodiments, the rotary shaft sealing device 010 is installed between the stirring shaft 07 and the partition 09.

The reactor in the embodiment of the utility model is a horizontal reactor, wherein the axial direction of a stirring shaft 07 is horizontally arranged, a floating end 71 of the stirring shaft 07 is provided with a positioning bearing 08 for positioning the position of the stirring shaft 07, and a stirring end 72 of the stirring shaft 07 is provided with paddles for stirring materials in the reactor so as to enable the materials to fully react. In order to prevent powder material in the reactor from escaping into the positioning bearing 08, a baffle 09 is provided in the reactor housing 06 separating the floating end 71 and the stirring end 72 of the stirring shaft 07.

In order to improve the sealing degree between the stirring shaft 07 and the partition plate 09, the rotary shaft sealing device 010 in the foregoing embodiment is installed between the stirring shaft 07 and the partition plate to seal.

The reactor in the embodiment of the present utility model includes the rotating shaft sealing device provided in the foregoing embodiment, and since the reactor in the embodiment of the present utility model has the same advantages as the rotating shaft sealing device provided in the foregoing embodiment, the description thereof will not be repeated.

In one embodiment, the device further comprises a gas supply unit, as shown in fig. 3, wherein the gas supply unit comprises a gas supply pipeline formed by sequentially connecting a gas inlet pipe 011, a filter 012, a check valve 013 and a gas outlet pipe 014, and a differential pressure meter 015 connected in parallel with two ends of the filter 012, and the gas outlet pipe 014 is communicated with the second gas seal cavity 32.

Wherein gas flows in from the gas inlet pipe 011, filtered by the filter 012, and flows in from the gas outlet pipe 014 to the second gas seal chamber 323 through the check valve 013, wherein the check valve 013 is used for preventing the gas from flowing back from the gas outlet pipe 014.

The embodiment of the utility model is provided with the gas supply unit for supplying gas to the rotating shaft sealing device, so that the gas is conveniently supplied. Taking polypropylene production as an example, gas-phase propylene is taken as a raw material for reaction in the reactor, gas sealing can be carried out by taking the gas-phase propylene as a rotating shaft sealing device, wherein the gas pressure of the gas-phase propylene used for gas sealing is larger than that of the gas-phase propylene in the reactor, so that effective sealing can be realized.

In one embodiment, the gas supply unit further comprises a pressure regulating valve 016, a flow transmitter 017, a pressure control member and a flow control member 018;

a pressure regulating valve 016 and a flow transmitter 017 are connected in series in the air supply line, a pressure control member is electrically connected to the pressure regulating valve 016, and a flow control member 018 is electrically connected to the flow transmitter 017.

The pressure regulating valve 016 is used for regulating the air pressure in the air supply pipeline, the pressure control piece is used for automatically controlling the pressure regulating valve 016, the pressure control piece can comprise a pressure transmitter 019 and a pressure controller 020, the pressure transmitter 019 detects the air pressure, and the pressure controller 020 controls the opening degree of the pressure regulating valve 016 according to a preset pressure regulating method to realize air pressure regulation.

The flow transmitter 017 is used for detecting and adjusting the gas flow in the gas supply pipeline, and the flow control member 018 acquires the real-time flow detected by the flow transmitter 017 and controls the flow transmitter to adjust the gas flow according to a preset flow adjusting method.

The gas supply unit in the embodiment of the utility model realizes the real-time adjustment of the gas flow and the gas pressure, and ensures the sealing effect of the rotating shaft sealing device 010 through the adjustment of the gas pressure and the gas flow.

In one embodiment, the gas supply unit further comprises

A first valve 021 and a second valve 022 connected in series to both ends of the filter 012;

a third valve 023 connected in parallel to both ends of the filter 012, the first valve 021 and the second valve 022;

two fourth valves 024 connected in series between the filter 012 and the differential pressure gauge 015, the two fourth valves 024 being connected to both ends of the filter 012, respectively.

The first valve 021, the second valve 022, the third valve 023 and the fourth valve 024 are arranged in the embodiment of the utility model, so that the gas can still be normally supplied during the replacement of the filter element of the filter 012. Specifically, when the filter 012 is normally put into use, the third valve 023 is closed, the first valve 021, the second valve 022, and the two fourth valves 024 are all opened, the gas flows through the filter 012 to the gas outlet pipe 014, and the differential pressure gauge 015 is connected to both ends of the filter 012 to detect the differential pressure of the gas at both ends of the differential pressure gauge 015. When the filter 012 changes the cartridge, the first valve 021, the second valve 022 and the two fourth valves 024 are closed, the third valve 023 is opened, and the gas directly flows to the gas outlet tube 014 through the third valve, and at this time, the gas is not filtered for gas supply in a short time for cartridge replacement.

What has been described above is merely illustrative of the principles and preferred embodiments of the present utility model. It should be noted that, for a person skilled in the art, an implementation manner in which the technical solutions disclosed in the different embodiments are appropriately combined is also included in the technical scope of the present utility model, and several other modifications are possible on the basis of the principle of the present utility model, which should also be regarded as the protection scope of the present utility model.

Claims

1. The rotating shaft sealing device is characterized by being arranged between a rotating shaft and a fixing piece arranged outside the rotating shaft, and the rotating shaft rotates relative to the fixing piece;

the rotating shaft sealing device comprises

2. The rotary shaft seal of claim 1 wherein said dry seal comprises

3. The rotary shaft seal of claim 2 wherein said lip seal ring is mounted at an end of said seal housing remote from said moving ring.

4. The rotary shaft seal of claim 2 wherein said stationary ring comprises

The connecting ring is abutted with the elastic piece;

5. The rotary shaft sealing device according to claim 4, wherein the peripheral edge of the connecting ring extends axially out of the annular baffle, and a second installation space is formed between the sealing seat and the annular baffle;

6. The rotary shaft sealing device according to claim 2, wherein the fixing piece is provided with a first air passage, and the sealing seat is provided with a second air passage;

7. A reactor, characterized by comprising

A reactor housing;

a shaft seal according to any one of claims 1 to 6, mounted between the stirring shaft and the partition.

8. The reactor according to claim 7, further comprising a gas supply unit including a gas supply line formed by connecting a gas inlet pipe, a filter, a check valve, and a gas outlet pipe in this order, and a differential pressure gauge connected in parallel to both ends of the filter, the gas outlet pipe being in communication with the second gas seal chamber.

9. The reactor of claim 8, wherein the gas supply unit further comprises a pressure regulator valve, a flow transmitter, a pressure control, and a flow control;

10. The reactor according to claim 8, wherein the gas supply unit further comprises