Hidden balance gas structure and compressor
By setting up a hidden balancing gas channel in the pressure bearing housing of the centrifugal compressor, the problem of large space occupied by the balanced gas pipeline in the prior art is solved, and more convenient construction and longer equipment service life is achieved.
Patent Information
- Application Number
- CN202422247180.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The balanced gas pipeline structure of existing centrifugal compressors requires a large installation space, is difficult to construct, and external pipe fittings are susceptible to environmental erosion, resulting in a short service life of the equipment and high maintenance requirements.
The hidden balancing gas structure is adopted, and the balancing gas channel is set in the pressure-bearing housing to communicate with the balancing cavity. The thickness of the pressure-bearing housing is used as the channel pipe wall to achieve gas balance and reduce external pipe fittings.
It effectively reduces the overall construction difficulty of the compressor, saves installation and maintenance costs, extends the service life of the equipment, and reduces the risk of gas leakage and maintenance needs caused by external environmental interference.
Smart Images
Figure CN223035371U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of compressor balance gas pipelines, and particularly relates to a concealed balance gas structure and a compressor. Background Art
[0002] During the operation of a centrifugal compressor, axial force will be generated on the rotor. To balance a part of the rotor axial force, it is generally achieved by connecting the low-pressure side of the compressor to the balance cavity after the balance disk seal, forming an external pipe-type balance gas pipeline. However, this pipe structure not only requires a larger installation space, but also has difficult pipeline layout and greater construction difficulty. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art or related technologies.
[0004] For this reason, a first aspect of the utility model provides a concealed balance gas structure.
[0005] A second aspect of the utility model provides a compressor.
[0006] In view of this, according to the first aspect of the embodiments of the present application, a concealed balance gas structure is proposed. An external pressure-bearing housing is provided outside the inner housing. The concealed balance gas structure includes:
[0007] A balance gas channel is penetrated through the pressure-bearing housing. The balance gas channel is connected to the balance cavity, and the balance gas channel forms an air port on the pressure-bearing housing.
[0008] A plugging member covers the air port, and the plugging member is detachably connected to the pressure-bearing housing to plug the air port.
[0009] In a feasible implementation manner, the concealed balance gas structure further includes:
[0010] A sealing member is arranged between the plugging member and the pressure-bearing housing, and the sealing member covers the air port.
[0011] In a feasible implementation manner, the plugging member includes:
[0012] A plugging plate covers the air port;
[0013] A fastening member, after passing through the plugging plate, is threadedly connected to the pressure-bearing housing.
[0014] In a feasible implementation manner, the balance gas channel includes:
[0015] A first channel penetrates through the pressure-bearing housing. The first end of the first channel forms a first air port on the pressure-bearing housing, and the second end of the first channel is connected to the low-pressure side of the balance cavity.
[0016] A second channel, the first end of the second channel is connected to the first channel, and the second end of the second channel forms a second air port on the press housing.
[0017] A third channel, the third channel is connected to the second channel, the first end of the third channel is connected to the high-pressure side of the balance cavity, and the second end of the third channel forms a third air port on the press housing.
[0018] In a feasible implementation manner, the first channel is arranged along the radial direction of the press housing, the second end of the first channel is connected to the balance air passage of the inner housing, and the first channel is connected to the low-pressure side of the balance cavity through the balance air passage of the inner housing.
[0019] In a feasible implementation manner, the second channel is arranged along the axial direction of the press housing.
[0020] In a feasible implementation manner, the second end of the third channel is arranged along the radial direction of the press housing, and the second end of the third channel is arranged at an angle with the first end of the third channel.
[0021] In a feasible implementation manner, the press housing includes a pressure-bearing outer shell and a pressure-bearing end cover, the first air port and the third air port are arranged on the side wall of the pressure-bearing outer shell, and the second air port is arranged on the end face of the pressure-bearing end cover.
[0022] In a feasible implementation manner, the press housing includes a pressure-bearing outer shell and a pressure-bearing end cover, and the pressure-bearing outer shell and the pressure-bearing end cover are of an integral structure.
[0023] According to the second aspect of the embodiments of the present application, a compressor is proposed, including: the hidden balance air structure described in any of the above technical solutions.
[0024] A hidden balance air structure and a compressor of the present application, compared with the prior art, have the beneficial effects as follows:
[0025] The hidden balance gas structure provided by the embodiment of the present application includes a balance gas channel and a plugging member. The balance gas channel is arranged inside the pressing machine housing and is communicated with the balance cavity of the inner machine housing. Then, by introducing the gas in the balance cavity into the balance gas channel, the pressure of the balance cavity is balanced. The balance gas channel is arranged through the pressing machine housing, and the thickness of the pressing machine housing is used as the pipe wall of the balance gas channel, hiding the balance gas channel inside the pressing machine housing. By realizing gas introduction inside the compressor instead of using a pipe-type balance gas pipeline, on the one hand, the hidden balance gas channel is less restricted by the installation space, which can effectively reduce the overall construction difficulty of the compressor. At the same time, it saves the labor and material costs of pipeline procurement, processing, welding and assembly construction, and flaw detection inspection, improving the construction convenience. On the other hand, using the hidden balance gas channel can effectively reduce the erosion and damage of the key pipeline components by the external environment, extend the service life of the equipment, reduce the potential gas leakage risk caused by external environment interference, thereby reducing the maintenance requirements caused by external factors, and improving the safety and maintainability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0027] Figure 1 is a schematic structural diagram of a hidden balance gas structure according to an embodiment provided by the present application;
[0028] Wherein, Figure 1 the corresponding relationship between the reference numerals in and the component names is:
[0029] 11, pressing machine housing; 12, inner machine housing; 13, balance gas channel; 14, plugging member; 15, balance cavity; 16, sealing member; 17, inner machine housing balance gas passage;
[0030] 111, pressure-bearing outer shell; 112, pressure-bearing end cover;
[0031] 131, first channel; 132, second channel; 133, third channel;
[0032] 141, plugging plate; 142, fastener. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.
[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specifically defined.
[0035] In the present application, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0036] The preferred embodiments of the present application are described below with reference to the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.
[0037] As Figure 1 shown, according to the first aspect of the embodiment of the present application, a hidden balance gas structure is proposed. An external pressure-bearing housing 11 is provided outside the inner housing 12. The hidden balance gas structure includes: a balance gas channel 13 and a plugging member 14; the balance gas channel 13 is disposed through the pressure-bearing housing 11, the balance gas channel 13 is communicated with a balance cavity 15, and the balance gas channel 13 forms a gas port on the pressure-bearing housing 11; the plugging member 14 covers the gas port, and the plugging member 14 is detachably connected to the pressure-bearing housing 11 to plug the gas port.
[0038] The hidden balance gas structure provided by the embodiment of the present application includes a balance gas channel 13 and a plugging member 14. The balance gas channel 13 is arranged inside the pressing machine housing 11 and is communicated with the balance cavity 15 of the inner machine housing 12. Then, by introducing the gas in the balance cavity 15 into the balance gas channel 13, the pressure of the balance cavity 15 is balanced. The balance gas channel 13 is arranged through the pressing machine housing 11, and the thickness of the pressing machine housing 11 is used as the pipe wall of the balance gas channel 13, hiding the balance gas channel 13 inside the pressing machine housing 11. By realizing gas introduction inside the compressor instead of using a pipe-type balance gas pipeline, on the one hand, the hidden balance gas channel 13 is less restricted by the installation space, which can effectively reduce the overall construction difficulty of the compressor, and at the same time save the labor and material costs for pipeline procurement, processing, welding and assembly construction, and flaw detection inspection, improving the construction convenience. On the other hand, using the hidden balance gas channel 13 can effectively reduce the erosion and damage of the external environment to the key pipeline components, extend the service life of the equipment, reduce the potential gas leakage risk caused by external environmental interference, thereby reducing the maintenance requirements caused by external factors, and improving the safety and maintainability of the equipment.
[0039] It can be understood that the balance gas channel 13 is arranged through the pressing machine housing 11 and forms a balance gas inlet and a balance gas outlet on the pressing machine housing 11. The balance gas channel 13 is communicated with the high-pressure side of the balance cavity 15 through the balance gas inlet and with the low-pressure side of the balance cavity 15 through the balance gas outlet, forming a balance gas channel 13 inside the pressing machine housing 11 to balance the pressure of the balance cavity 15.
[0040] As Figure 1 shown, in a feasible embodiment, the hidden balance gas structure further includes: a sealing member 16, which is arranged between the plugging member 14 and the pressing machine housing 11, and the sealing member 16 covers the gas port.
[0041] In this technical solution, a sealing member 16 is arranged between the plugging member 14 and the pressing machine housing 11, and the plugging member 14 fixes the sealing member 16 to ensure the airtightness of the balance gas channel 13 and reduce the potential gas leakage risk.
[0042] It can be understood that based on the Occam's razor principle of scientific methodology, the concept of "do not increase entities without necessity", by reducing the external components of the compressor and adopting a simpler structure of the plugging member 14 and the sealing member 16 to achieve the function of the airtightness of the balance gas channel 13, it is beneficial to reduce the possibility of accidents caused by gas leakage.
[0043] Furthermore, a positioning groove is arranged on the pressing machine housing 11, and the bottom of the sealing member 16 is embedded in the positioning groove to position the sealing member 16, so as to ensure the stability of the fixing of the plugging member 14 to the sealing member 16 and prevent the displacement of the sealing member 16 from affecting the sealing effect.
[0044] As a preferred solution, the seal 16 is a sealing gasket.
[0045] Such as Figure 1 As shown, in a feasible embodiment, the plugging member 14 includes: a plugging plate 141 and a fastener 142; the plugging plate 141 covers the air port; after the fastener 142 passes through the plugging plate 141, the fastener 142 is threadedly connected to the pressing machine housing 11.
[0046] In this technical solution, the plugging plate 141 is used to plug the air port and fix the seal 16, and the fastener 142 detachably connects the plugging member 14 to the pressing machine housing 11. The plugging member 14 and the seal 16 adopt a modular design, making it more convenient to repair or replace the plugging member 14 and the seal 16, reducing the maintenance cost, and improving the maintainability of the equipment.
[0047] Furthermore, an external thread is provided on the outer wall of the fastener 142. By providing a threaded hole in the pressing machine housing 11 that matches the fastener 142, the plugging member 14 can be fixed to the pressing machine housing 11 using the fastener 142, which is quick to disassemble and assemble and convenient for maintenance.
[0048] As a preferred solution, the plugging member 14 is a blind flange and the fastener 142 is a bolt.
[0049] Such as Figure 1 As shown, in a feasible embodiment, the balance air channel 13 includes: a first channel 131, a second channel 132, and a third channel 133; the first channel 131 penetrates through the pressing machine housing 11, the first end of the first channel 131 forms a first air port on the pressing machine housing 11, and the second end of the first channel 131 is connected to the low-pressure side of the balance cavity 15; the first end of the second channel 132 is connected to the first channel 131, and the second end of the second channel 132 forms a second air port on the pressing machine housing 11; the third channel 133 is connected to the second channel 132, the first end of the third channel 133 is connected to the high-pressure side of the balance cavity 15, and the second end of the third channel 133 forms a third air port on the pressing machine housing 11.
[0050] In this technical solution, the balance gas passage 13 includes a first passage 131, a second passage 132, and a third passage 133. The third passage 133 is the balance gas inlet end, and the first passage 131 is the balance gas outlet end. The gas in the balance cavity 15 enters the balance gas passage 13 from the third passage 133, flows through the second passage 132, and then returns to the balance cavity 15 from the first passage 131 to balance the pressure in the balance cavity 15. By opening a third air port on the pressing machine housing 11 and extending it to the high-pressure side of the balance cavity 15, a third passage 133 communicating with the high-pressure side of the balance cavity 15 is formed to draw out gas from the high-pressure side of the balance cavity 15; by opening a second air port on the pressing machine housing 11 and extending it to the third passage 133, a second passage 132 communicating with the third passage 133 is formed; by opening a first air port on the pressing machine housing 11 and extending it to the second passage 132 and the low-pressure side of the balance cavity 15, a first passage 131 communicating with the second passage 132 and the low-pressure side of the balance cavity 15 is formed to draw the balance gas back to the low-pressure side of the balance cavity 15; the first passage 131, the second passage 132, and the third passage 133 are staggered with each other to form a multi-pass flow structure, which can reduce the gas flow rate in the balance gas passage 13, thereby achieving a better balance effect.
[0051] As Figure 1 shown, in a feasible implementation manner, the first passage 131 is arranged along the radial direction of the pressing machine housing 11, and the second end of the first passage 131 is connected to the balance gas passage of the inner machine housing 12. The first passage 131 is connected to the low-pressure side of the balance cavity 15 through the balance gas passage of the inner machine housing 12.
[0052] In this technical solution, the first passage 131 is arranged along the radial direction of the pressing machine housing 11 and is connected to the balance gas passage of the inner machine housing 12 to shorten the length of the first passage 131, so that the gas in the balance gas passage 13 can flow back to the balance cavity 15 more quickly, thereby quickly and effectively achieving pressure balance.
[0053] Furthermore, the axis of the first passage 131 coincides with the axis of the balance gas passage of the inner machine housing 12, and the inner diameter of the first passage 131 is equal to the inner diameter of the balance gas passage of the inner machine housing 12 to reduce the vortex and turbulence phenomena when the gas flows back to the balance cavity 15, ensure the smoothness of the gas flow, and avoid affecting the normal operation of the compressor.
[0054] As Figure 1 shown, in a feasible implementation manner, the second passage 132 is arranged along the axial direction of the pressing machine housing 11.
[0055] In this technical solution, the second passage 132 intersects the first passage 131 perpendicularly to shorten the length of the second passage 132, avoid the pressure loss caused by the too long second passage 132, and is beneficial to enhancing the balance effect of the balance gas passage 13.
[0056] As Figure 1 shown, in a feasible implementation, the second end of the third channel 133 is arranged along the radial direction of the pressure-bearing housing 11, and the second end of the third channel 133 is arranged at an angle with the first end of the third channel 133.
[0057] In this technical solution, one end of the third channel 133 is perpendicularly intersecting with the second channel 132, and the other end of the third channel 133 is arranged at an angle and connected to the high-pressure side of the balance cavity 15, so that the gas on the high-pressure side of the balance cavity 15 can quickly enter the third channel 133 through this angle, thereby quickly balancing the pressure on the high-pressure side of the balance cavity 15.
[0058] Furthermore, the inner diameter of the first channel 131 is equal to the inner diameter of the second channel 132 which is equal to the inner diameter of the third channel 133, ensuring the smooth and fluent flow of gas in the balance gas channel 13.
[0059] It can be understood that by arranging and designing the hidden balance gas channel 13, the flow path of gas inside the compressor can be optimized, reducing vortex and turbulence phenomena, which is beneficial to improving the compression efficiency of gas. At the same time, it can reduce the stress concentration in the pipeline or the damage caused by the airflow impact vibration generated by the high-pressure airflow, which is beneficial to improving the overall operation safety of the equipment.
[0060] As Figure 1 shown, in a feasible implementation, the pressure-bearing housing 11 includes a pressure-bearing outer shell 111 and a pressure-bearing end cover 112. The first air port and the third air port are arranged on the side wall of the pressure-bearing outer shell 111, and the second air port is arranged on the end face of the pressure-bearing end cover 112.
[0061] In this technical solution, the first channel 131 is formed by opening and extending the first air port on the pressure-bearing outer shell 111, close to the low-pressure side of the balance cavity 15; the third channel 133 is formed by opening and extending the third air port on the pressure-bearing outer shell 111, close to the high-pressure side of the balance cavity 15; the second channel 132 is formed by opening and extending the second air port on the pressure-bearing end cover 112. The second channel 132 connects the first channel 131 and the third channel 133. The overall processing of the balance gas channel 13 is simple, saving the procurement cost of pipeline components, and there is no need for pipe fitting erection, construction, welding, processing, inspection, etc. It saves a large amount of labor and material costs while improving the equipment quality.
[0062] As Figure 1 shown, in a feasible implementation, the pressure-bearing housing 11 includes a pressure-bearing outer shell 111 and a pressure-bearing end cover 112, and the pressure-bearing outer shell 111 and the pressure-bearing end cover 112 are of an integral structure.
[0063] In this technical solution, the balance gas passage 13 is arranged inside the pressing machine housing 11, and the thickness of the pressing machine housing 11 is used as the pipe wall of the balance gas passage 13. There is no need for external pipe fittings, so that the cylindrical pressure-bearing outer shell 111 of the compressor stator and the high-pressure side pressure-bearing end cover 112 can be installed outside the inner housing 12 as an integral structure, eliminating the sealing structure at the joint of the pressure-bearing outer shell 111 and the pressure-bearing end cover 112 and reducing the risk of gas leakage.
[0064] According to the second aspect of the present application, a compressor is proposed, including: a hidden balance gas structure according to any one of the above technical solutions.
[0065] The compressor provided by the embodiments of the present application includes the hidden balance gas structure according to any one of the above technical solutions, so the compressor has all the beneficial effects of the hidden balance gas structure of the above technical solutions, which will not be elaborated here.
[0066] Specifically, the compressor may include a high-pressure centrifugal compressor.
[0067] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed.
[0068] The above are only the preferred embodiments of the present application, and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the technical principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.
Claims
1. A hidden balanced gas structure, characterized in that: A pressure-bearing casing is arranged outside the inner casing, and the hidden balance gas structure comprises: A balancing air channel, wherein the balancing air channel is arranged through the pressure-bearing casing, the balancing air channel is communicated with the balancing cavity, and the balancing air channel forms an air port on the pressure-bearing casing; A blocking piece, the blocking piece covers the air port, and the blocking piece is detachably connected to the pressure-bearing casing to block the air port.
2. A hidden balanced air structure according to claim 1, characterized in that: The hidden balance gas structure also includes: A sealing member is disposed between the blocking member and the pressure-bearing casing, and covers the air port.
3. A hidden balanced air structure according to claim 1, characterized in that: The blocking member comprises: A blocking plate, the blocking plate covering the air port; A fastener, after passing through the blocking plate, the fastener is threadedly connected to the pressure-bearing casing.
4. A hidden balanced gas structure according to claim 1, characterized in that: The balancing gas channel comprises: a first channel, wherein the first channel runs through the pressure-bearing casing, a first end of the first channel forms a first air port on the pressure-bearing casing, and a second end of the first channel is connected to a low-pressure side of the balance chamber; a second channel, wherein a first end of the second channel is connected to the first channel, and a second end of the second channel forms a second air port on the pressure-bearing casing; A third channel is connected to the second channel, a first end of the third channel is connected to the high-pressure side of the balance chamber, and a second end of the third channel forms a third air port on the pressure-bearing casing.
5. A hidden balanced air structure according to claim 4, characterized in that: The first channel is arranged along the radial direction of the pressure-bearing casing, the second end of the first channel is connected to the inner casing balancing gas passage, and the first channel is connected to the low-pressure side of the balancing cavity through the inner casing balancing gas passage.
6. A hidden balanced air structure according to claim 4, characterized in that: The second passage is arranged along the axial direction of the pressure-bearing casing.
7. A hidden balanced air structure according to claim 4, characterized in that: The second end of the third channel is arranged along the radial direction of the pressure-bearing casing, and the first end of the third channel is arranged at an angle to the second end of the third channel.
8. A hidden balanced air structure according to claim 4, characterized in that: The pressure-bearing casing includes a pressure-bearing outer shell and a pressure-bearing end cover. The first air port and the third air port are arranged on the side wall of the pressure-bearing outer shell, and the second air port is arranged on the end surface of the pressure-bearing end cover.
9. A hidden balanced gas structure according to any one of claims 1 to 8, characterized in that: The pressure-bearing casing comprises a pressure-bearing outer shell and a pressure-bearing end cover, and the pressure-bearing outer shell and the pressure-bearing end cover are an integrated structure.
10. A compressor, characterized in that: It comprises a hidden balancing gas structure as described in any one of claims 1 to 9.