Container type comb tooth carbon ring sealing device

Abstract

The utility model relates to the technical field of sealing mechanisms, and provides a container type comb tooth carbon ring sealing device which comprises a rotating shaft piece. The gas compression part is arranged on the rotating shaft part; the sealing shell is arranged on the rotating shaft piece in a sleeving mode and provided with an annular sinking groove and a comb tooth section which are sequentially arranged, and the comb tooth section is used for pressure relief; the multiple sealing pieces are sequentially arranged in the annular sinking groove, and the sealing pieces are used for sealing the gas compression piece; and the cover body is arranged on the sealing shell, and the cover body is used for sealing the annular sinking groove. By means of the technical scheme, the problem that in the prior art, a sealing device between an impeller and a rotating shaft is poor in sealing effect is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing mechanisms, and more specifically, to an assembled comb-tooth carbon ring sealing device. Background Art

[0002] During the operation of a centrifugal steam compressor, the impeller is located in the working chamber and is connected to the rotating shaft. Since it is a moving part, it cannot be completely sealed. When the compressor is running normally, there is more or less a pressure difference between the space where the gas working component is located and the external space. The sealing effect of the sealing device in the prior art is not good, resulting in air leakage from the gap between the back of the impeller and the diffuser, and then entering the working chamber, leading to the pollution of the working medium. Or it leaks out of the working chamber, and the leaked gas may cause environmental pollution in the working environment. Content of the Utility Model

[0003] The utility model provides an assembled comb-tooth carbon ring sealing device, which solves the problem of poor sealing effect of the sealing device between the impeller and the rotating shaft in the related art.

[0004] The technical solution of the utility model is as follows:

[0005] An assembled comb-tooth carbon ring sealing device, comprising:

[0006] A rotating shaft member;

[0007] A gas compression member, arranged on the rotating shaft member;

[0008] A sealing housing, sleeved on the rotating shaft member, and having an annular sink and a comb-tooth section arranged in sequence, the comb-tooth section being used for pressure relief;

[0009] Sealing members, several in number, arranged in sequence in the annular sink, the sealing members being used for sealing the gas compression member;

[0010] A cover body, arranged on the sealing housing, the cover body being used for sealing the annular sink.

[0011] As a further technical solution, the sealing housing has a first drain port, and the sealing member includes:

[0012] A first sealing unit, several in number, all arranged in the annular sink, the first sealing unit abutting against the comb-tooth section;

[0013] A second sealing unit, arranged in the annular sink, the second sealing unit having a second drain port, the second drain port communicating with the first drain port;

[0014] The third sealing unit, with several of them, is all arranged in the annular sunk groove. The second sealing unit is located between the first sealing unit and the third sealing unit, and the third sealing unit abuts against the cover body.

[0015] As a further technical solution, the first sealing unit includes:

[0016] An installation ring, arranged in the annular sunk groove;

[0017] The first split spring carbon ring, arranged in the annular sunk groove;

[0018] A first connecting piece, with one end arranged on the installation ring and the other end arranged on the first split spring carbon ring.

[0019] As a further technical solution, the installation ring and the rotating shaft member form a first inner ring groove, the installation ring and the sealing housing form a first outer ring groove, the first split spring carbon ring is arranged in the first inner ring groove, and the first outer ring groove is used for installing a sealing ring.

[0020] As a further technical solution, the second sealing unit includes:

[0021] A uniform hole ring, arranged in the annular sunk groove, and the second drain port is located on the uniform hole ring;

[0022] The second split spring carbon ring, arranged in the annular sunk groove;

[0023] A second connecting piece, with one end arranged on the uniform hole ring and the other end arranged on the second split spring carbon ring.

[0024] As a further technical solution, the uniform hole ring and the rotating shaft member form a second inner ring groove, the uniform hole ring and the sealing housing form a second outer ring groove, the second split spring carbon ring is arranged in the second inner ring groove, and the second outer ring groove is used for installing the sealing ring.

[0025] As a further technical solution, the third sealing unit has the same structure as the first sealing unit.

[0026] As a further technical solution, the rotating shaft member includes:

[0027] A rotating shaft, on which the gas compression member is arranged;

[0028] A shaft sleeve, arranged on the rotating shaft, and the installation ring and the uniform hole ring respectively form the first inner ring groove and the second inner ring groove with the shaft sleeve.

[0029] As a further technical solution, an alloy is sprayed on the outer side of the shaft sleeve.

[0030] As a further technical solution, the gas compression member includes:

[0031] An impeller disposed on the rotating shaft;

[0032] A diffuser disposed on the impeller, and the sealing housing is disposed on the diffuser.

[0033] The working principle and beneficial effects of the present utility model are as follows:

[0034] In the present utility model, this solution is a sealing device between the back of the impeller of a centrifugal steam compressor and the outside world. In actual application, the rotating shaft member can withstand the huge stress brought by high-speed rotation. The gas compression member is tightly installed on the rotating shaft member, and its shape and size are designed according to specific compression requirements. For example, in a scenario for industrial steam compression, the gas compression member may have specific blade shapes and angles to achieve efficient steam compression. The depth and width of the annular sink can accommodate an appropriate number and specifications of seals. The tooth shape and spacing of the comb teeth section are also optimized to effectively achieve the pressure relief function. When the air flow passes through the comb teeth section on the sealing housing, a vortex will be formed in the comb teeth section area, thereby reducing the pressure of the gas and thus reducing the leakage amount. The seals are tightly arranged in the annular sink to form an effective sealing barrier. Suppose in a high-temperature and high-pressure steam compression environment, the seals can withstand temperatures up to several hundred degrees Celsius and pressures of several atmospheres to prevent gas leakage. The cover body is firmly installed on the sealing housing through connecting parts such as bolts to ensure that the annular sink is completely sealed. This solution can better reduce the problem of gas leakage from the gap of the gas compression member during mechanical operation, thereby reducing the safety hazards for workers during work and protecting the working environment. While reducing gas leakage, it can also improve the working efficiency of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present utility model in a clear and understandable manner in conjunction with the drawings of the preferred embodiments.

[0036] Figure 1 It is a schematic cross-sectional view of the present utility model;

[0037] Figure 2 is Figure 1 a partial cross-sectional view;

[0038] Figure 3 is Figure 1 a partial cross-sectional view;

[0039] Figure 4 It is a schematic structural view of the first sealing unit of the present utility model;

[0040] Figure 5 This is a schematic structural diagram of the second sealing unit of the present utility model.

[0041] In the figure: 100, rotating shaft member; 200, gas compression member; 300, sealing housing, 310, annular sink; 320, comb tooth section; 400, seal; 500, cover body; 330, first drain port; 410, first sealing unit; 420, second sealing unit; 421, second drain port; 430, third sealing unit; 411, mounting ring; 412, first split spring carbon ring; 413, first connecting member; 414, first inner ring groove; 415, first outer ring groove; 426, equal hole ring; 422, second split spring carbon ring; 423, second connecting member; 424, second inner ring groove; 425, second outer ring groove; 110, rotating shaft; 120, shaft sleeve; 210, impeller; 220, diffuser. Specific embodiments

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, they can also be understood as further technical solutions. In some of the figures, components with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also means "more than one" situation, and "several" includes "two" and "more than two".

[0043] In this article, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0044] In addition, in the description of this application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0045] Referring to Figures 1 to 5 , as the first embodiment of the present utility model, there is provided

[0046] An assembled comb tooth carbon ring sealing device, comprising:

[0047] A rotating shaft member 100;

[0048] The gas compression member 200 is arranged on the rotating shaft member 100;

[0049] The sealing housing 300 is sleeved on the rotating shaft member 100 and has an annular sinking groove 310 and a comb tooth section 320 arranged in sequence. The comb tooth section 320 is used for pressure relief;

[0050] There are several sealing members 400, which are arranged in the annular sinking groove 310 in sequence. The sealing members 400 are used to seal the gas compression member 200;

[0051] The cover body 500 is arranged on the sealing housing 300, and the cover body 500 is used to seal the annular sinking groove 310.

[0052] In this embodiment, the present solution is a sealing device between the back of the impeller 210 of a centrifugal steam compressor and the outside. In practical applications, the rotating shaft member 100 can withstand the huge stress brought by high-speed rotation. The gas compression member 200 is tightly installed on the rotating shaft member 100, and its shape and size are designed according to specific compression requirements. For example, in a scenario for industrial steam compression, the gas compression member 200 may have a specific blade shape and angle to achieve efficient steam compression. The depth and width of the annular sinking groove 310 can accommodate an appropriate number and specifications of the sealing members 400. The tooth shape and pitch of the comb tooth section 320 are also optimized to effectively achieve the pressure relief function. When the air flow passes through the comb tooth section 320 on the sealing housing 300, a vortex will be formed in the area of the comb tooth section 320, thereby reducing the pressure of the gas and reducing the leakage amount. The sealing members 400 are closely arranged in the annular sinking groove 310 to form an effective sealing barrier. Suppose in a high-temperature and high-pressure steam compression environment, the sealing members 400 can withstand temperatures up to several hundred degrees Celsius and pressures of several atmospheres, preventing gas leakage. The cover body 500 is firmly installed on the sealing housing 300 through connectors such as bolts to ensure that the annular sinking groove 310 is completely sealed. The present solution can better reduce the problem of gas leakage from the gap of the gas compression member 200 during mechanical operation, thereby reducing the safety hazards for workers during work and protecting the working environment. While reducing gas leakage, it can also improve the working efficiency of the compressor.

[0053] Furthermore, the sealing housing 300 has a first condensate drain port 330, and the sealing member 400 includes:

[0054] There are several first sealing units 410, all of which are arranged in the annular sinking groove 310, and the first sealing units 410 abut against the comb tooth section 320;

[0055] The second sealing unit 420 is arranged in the annular sinking groove 310. The second sealing unit 420 has a second condensate drain port 421, and the second condensate drain port 421 is communicated with the first condensate drain port 330;

[0056] The third sealing unit 430, which has several of them, is all arranged in the annular sunk groove 310. The second sealing unit 420 is located between the first sealing unit 410 and the third sealing unit 430, and the third sealing unit 430 abuts against the cover body 500.

[0057] In this embodiment, the sealing housing 300 serves as the outer shell of the entire sealing device. An annular sunk groove 310 is designed inside it to accommodate multiple sealing units. At the same time, a first condensate drain port 330 is designed on the housing, which serves as a condensate leakage interface, a gas leakage interface, or a sealed gas interface. The first sealing unit 410 consists of several components, all of which are arranged in the annular sunk groove 310 and are in close contact with the comb tooth section 320. The first sealing unit 410 can effectively prevent steam from leaking to the outside. At the same time, when used in conjunction with the comb tooth section 320, it further improves the sealing effect and reduces energy loss. The second sealing unit 420 is also arranged in the annular sunk groove 310. It has a second condensate drain port 421, and the second condensate drain port 421 communicates with the first condensate drain port 330 on the sealing housing 300, forming a complete condensate discharge channel. The third sealing unit 430 also consists of several components, is arranged in the annular sunk groove 310, and is tightly connected to the cover body 500. The function of the third sealing unit 430 is to ensure the complete isolation of the inside of the sealing housing 300 from the external environment, prevent external air or impurities from entering, and at the same time support and fix the cover body 500 to maintain the structural stability and sealing integrity of the entire sealing device. This embodiment not only optimizes the steam sealing and condensate discharge mechanisms, improves the sealing performance and operation safety of the equipment, but also ensures the convenience of operation and the long-term reliability of the equipment.

[0058] Furthermore, the first sealing unit 410 includes:

[0059] An installation ring 411, which is arranged in the annular sunk groove 310;

[0060] The first split spring carbon ring 412, which is arranged in the annular sunk groove 310;

[0061] A first connecting piece 413, with one end arranged on the installation ring 411 and the other end arranged on the first split spring carbon ring 412.

[0062] The installation ring 411 and the rotating shaft member 100 form a first inner ring groove 414, and the installation ring 411 and the sealing housing 300 form a first outer ring groove 415. The first split spring carbon ring 412 is arranged in the first inner ring groove 414, and the first outer ring groove 415 is used for installing the sealing ring.

[0063] In this embodiment, the mounting ring 411 fits tightly within the annular sink 310. There is an annular sealing ring between the mounting ring 411 and the annular sink 310. The first split spring carbon ring 412 is disposed within the annular sink 310 and is connected to the mounting ring 411 through a first connecting member 413. The first split spring carbon ring 412 adopts a split design and is composed of multiple carbon ring segments. Each segment is connected by an internal spring, forming an elastic sealing structure, which improves the adaptability and reliability of the seal and reduces the possibility of steam leakage. When the rotating shaft member 100 cooperates with the first split spring carbon ring 412, a certain gap is left. The first connecting member 413 firmly connects the split spring carbon ring to the mounting ring 411. The first connecting member 413 may adopt connection methods such as bolts, pins, or snaps, and the most suitable connection method is selected according to the actual working conditions and sealing requirements. This embodiment improves the sealing performance and operating safety of the equipment.

[0064] Further, the second sealing unit 420 includes:

[0065] A uniform hole ring 426, disposed within the annular sink 310, and the second drain port 421 is located on the uniform hole ring 426;

[0066] A second split spring carbon ring 422, disposed within the annular sink 310;

[0067] A second connecting member 423, with one end disposed on the uniform hole ring 426 and the other end disposed on the second split spring carbon ring 422.

[0068] In this embodiment, the hole ring is disposed within the annular sink 310, and the second drain port 421 is designed thereon for collecting and discharging condensate. The aperture and distribution of the uniform hole ring 426 are designed to adapt to the condensate flow generated during the steam compression process, ensuring the smooth discharge of condensate and avoiding the accumulation of condensate inside the sealing device. The second split spring carbon ring 422 is also disposed within the annular sink 310 and is connected to the uniform hole ring 426 through the second connecting member 423. The second split spring carbon ring 422 adopts a split design similar to that of the first split spring carbon ring 412 and is composed of multiple carbon ring segments. Each segment is connected by an internal spring, forming an elastic sealing structure. When the rotating shaft member 100 cooperates with the second split spring carbon ring 422, a certain gap is left. This design can adapt to the minor deformation or vibration of the back of the impeller 210, improve the adaptability and reliability of the seal, and at the same time has the function of guiding the condensate to the first drain port 330.

[0069] Further, the uniform hole ring 426 and the rotating shaft member 100 form a second inner annular groove 424, and the uniform hole ring 426 and the sealing housing 300 form a second outer annular groove 425. The second split spring carbon ring 422 is disposed within the second inner annular groove 424, and the second outer annular groove 425 is used for installing a sealing ring.

[0070] In this embodiment, a second inner ring groove 424 is formed between the porous ring 426 and the rotating shaft member 100, and the second split spring carbon ring 422 can be installed in the inner ring groove. The size and shape of the second inner ring groove 424 are designed to adapt to the structure of the second split spring carbon ring 422, so that the second split spring carbon ring 422 is in close contact with the rotating shaft member 100, improving the sealing effect. A second outer ring groove 425 is formed between the porous ring 426 and the sealing housing 300, providing space for installing the sealing ring. The sealing ring can be closely attached between the porous ring 426 and the sealing housing 300, forming an additional sealing barrier and further enhancing the sealing performance of the sealing device.

[0071] Furthermore, the third sealing unit 430 has the same structure as the first sealing unit 410.

[0072] Furthermore, the rotating shaft member 100 includes:

[0073] A rotating shaft 110, on which the gas compression member 200 is arranged;

[0074] A shaft sleeve 120, arranged on the rotating shaft 110, and the mounting ring 411 and the porous ring 426 respectively form a first inner ring groove 414 and a second inner ring groove 424 with the shaft sleeve 120.

[0075] An alloy is sprayed on the outer side of the shaft sleeve 120.

[0076] In this embodiment, an annular sealing ring is also installed inside the shaft sleeve 120 and an alloy is sprayed on the outer surface of the shaft sleeve 120 to prevent excessive wear. A positioning pin is installed on the rotating shaft 110, and the shaft sleeve 120 is arranged on the rotating shaft 110 through the positioning pin. The mounting ring 411 and the porous ring 426 are fixed on the shaft sleeve 120, forming a first inner ring groove 414 and a second inner ring groove 424.

[0077] Furthermore, the gas compression member 200 includes:

[0078] An impeller 210, arranged on the rotating shaft 110;

[0079] A diffuser 220, arranged on the impeller 210, and the sealing housing 300 is arranged on the diffuser 220.

[0080] In this embodiment, the impeller 210 is arranged on the rotating shaft 110, and the diffuser 220 is arranged on the impeller 210. Its design enables the high-speed steam coming out of the impeller 210 to decelerate smoothly, while converting kinetic energy into static pressure energy, thereby increasing the pressure of the steam. The diffuser 220 adopts a hydrodynamic optimization design to adapt to the steam flow rate and pressure requirements under different working conditions, ensuring the efficiency and stability of the steam compression process. The sealing housing 300 is arranged on the diffuser 220, and its design ensures the encapsulation of the entire sealing device and the stable installation of the components. The sealing housing 300 not only provides an installation space for the first sealing unit 410, the second sealing unit 420 and related components, but also forms a closed steam compression and sealing environment through close cooperation with the diffuser 220, preventing steam leakage and improving the sealing performance and operation efficiency of the equipment.

[0081] Working principle:

[0082] During operation, after the working medium gas does work when flowing through the centrifugal compressor impeller 210, the pressure of the working medium gas in the sealing cavity increases. At this time, it will flow into the comb tooth section 320 of the sealing housing 300 from the gap between the back of the impeller 210 and the diffuser 220. When flowing through the comb tooth section 320 on the sealing housing 300, eddy currents will be formed in the adjacent areas of the comb tooth section 320, thereby reducing the pressure of the working medium gas flowing into the next area. When the working medium gas passes through the gap between the first split spring carbon ring 412, the second split spring carbon ring 422 and the shaft sleeve 120, since the shaft sleeve 120 and the rotating shaft 110 are fixed together and the shaft sleeve 120 is also rotating at a high speed, the flowing working medium gas will rotate circumferentially in this gap to form an air film, reducing the pressure again and protecting the shaft sleeve 120 and the first split spring carbon ring 412, the second split spring carbon ring 422 from direct contact, thereby reducing wear. The already depressurized working medium gas and part of the condensed water directly drain into the pre-connected pipeline from the first drain port 330 when flowing through the equalizing hole ring 426, and are discharged in the permitted discharge area. Because most of the working medium gas has been discharged, when passing through the second split spring carbon ring 422 and the cover body 500, it is depressurized again, and the pressure difference with the atmosphere will be very small. Finally, only the working medium gas allowed within the design range leaks out.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A containerized comb-tooth carbon ring sealing device, characterized in that: include: A rotating shaft (100); A gas compression component (200) is arranged on the rotating shaft component (100); A sealing housing (300) is sleeved on the rotating shaft (100) and has an annular sink groove (310) and a comb tooth segment (320) arranged in sequence, wherein the comb tooth segment (320) is used for pressure relief; A plurality of sealing members (400) are sequentially arranged in the annular groove (310), and the sealing members (400) are used to seal the gas compression member (200); A cover body (500) is arranged on the sealing shell (300), and the cover body (500) is used to seal the annular sink groove (310).

2. A containerized comb-tooth carbon ring sealing device according to claim 1, characterized in that: The sealed housing (300) has a first row of condensation ports (330), and the sealing element (400) comprises: A plurality of first sealing units (410) are provided, all of which are arranged in the annular recessed groove (310), and the first sealing units (410) abut against the comb tooth segments (320); a second sealing unit (420) disposed in the annular trough (310), the second sealing unit (420) having a second row of condensate ports (421), the second row of condensate ports (421) being in communication with the first row of condensate ports (330); There are a plurality of third sealing units (430), all of which are arranged in the annular recessed groove (310); the second sealing unit (420) is located between the first sealing unit (410) and the third sealing unit (430); and the third sealing unit (430) abuts against the cover body (500).

3. A containerized comb-tooth carbon ring sealing device according to claim 2, characterized in that: The first sealing unit (410) comprises: A mounting ring (411) disposed in the annular recess (310); A first split-petal tension spring carbon ring (412) is arranged in the annular sink groove (310); A first connecting member (413) has one end arranged on the mounting ring (411) and the other end arranged on the first split-petal tension spring carbon ring (412).

4. The assembled comb-tooth carbon ring sealing device according to claim 3, characterized in that: The mounting ring (411) and the rotating shaft (100) form a first inner ring groove (414), the mounting ring (411) and the sealing housing (300) form a first outer ring groove (415), the first split-petal tension spring carbon ring (412) is arranged in the first inner ring groove (414), and the first outer ring groove (415) is used for mounting a sealing ring.

5. The assembled comb-tooth carbon ring sealing device according to claim 4, characterized in that: The second sealing unit (420) comprises: A hole-averaging ring (426) is disposed in the annular sink (310), and the second row of condensate ports (421) are located on the hole-averaging ring (426); A second split-petal tension spring carbon ring (422) is disposed in the annular recess (310); A second connecting member (423) has one end disposed on the equalizing hole ring (426) and the other end disposed on the second split-petal tension spring carbon ring (422).

6. The assembled comb-tooth carbon ring sealing device according to claim 5, characterized in that: The hole-equalizing ring (426) and the rotating shaft (100) form a second inner ring groove (424), the hole-equalizing ring (426) and the sealing housing (300) form a second outer ring groove (425), the second split-petal tension spring carbon ring (422) is arranged in the second inner ring groove (424), and the second outer ring groove (425) is used for installing the sealing ring.

7. The assembled comb-tooth carbon ring sealing device according to claim 2, characterized in that: The third sealing unit (430) has the same structure as the first sealing unit (410).

8. The assembled comb-tooth carbon ring sealing device according to claim 6, characterized in that: The rotating shaft (100) comprises: A rotating shaft (110), wherein the gas compression component (200) is arranged on the rotating shaft (110); The shaft sleeve (120) is arranged on the rotating shaft (110), and the mounting ring (411) and the hole-equalizing ring (426) respectively form the first inner ring groove (414) and the second inner ring groove (424) with the shaft sleeve (120).

9. The assembled comb-tooth carbon ring sealing device according to claim 8, characterized in that: The outer side of the shaft sleeve (120) is sprayed with alloy.

10. The assembled comb-tooth carbon ring sealing device according to claim 8, characterized in that: The gas compression component (200) comprises: An impeller (210) is arranged on the rotating shaft (110); The diffuser (220) is arranged on the impeller (210), and the sealing housing (300) is arranged on the diffuser (220).

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