A steam compressor

Abstract

The present application relates to a steam compressor, and relates to the technical field of gas compression equipment, comprising a housing, a driving impeller located in the housing, a rotating shaft rotatably connected to the housing, and a driving motor for driving the rotating shaft to rotate, wherein the driving impeller is connected to the rotating shaft; the rotating shaft is provided with a gas collecting cylinder and a heat dissipation fan; the gas collecting cylinder is sleeved on the rotating shaft, and a gap for gas flow is provided between the end walls of the gas collecting cylinder and the housing facing each other; the gas collecting cylinder is provided with a connecting rod, which is connected to the housing; the housing is provided with a plurality of heat dissipation fins, which are located inside the area surrounded by the gas collecting cylinder; the heat dissipation fan is connected to the rotating shaft for blowing air into the gas collecting cylinder. The heat dissipation fan can make low-temperature air flow into the gas collecting cylinder, which is beneficial to reducing the temperature of the housing at the position of the rotating shaft, so as to reduce the risk of expansion and deformation of the housing at the position of the rotating shaft, thereby helping to reduce the possibility of steam in the housing leaking at the position of the rotating shaft.

Description

Technical Field

[0001] The present application relates to the technical field of gas compression equipment, and in particular to a steam compressor. Background Art

[0002] A steam compressor is a device that increases the temperature and pressure of steam through compression. During the methanol purification process, a steam compressor is often used to increase the temperature and pressure of the methanol vapor to improve its purity.

[0003] A steam compressor generally includes a base and a casing, which is connected to the base; a driving impeller is arranged in the casing; the casing is coaxially connected to a rotating shaft, and the driving impeller is connected to the rotating shaft; the casing is provided with an air inlet pipe and an air outlet pipe; the base is provided with a driving motor; the output shaft of the driving motor is connected to the rotating shaft through a gearbox to drive the rotating shaft to rotate, thereby driving the driving impeller to rotate, so that steam is sucked into the casing through the air inlet pipe; the steam is compressed in the casing and discharged from the air outlet pipe, thereby achieving the effect of increasing the temperature and pressure of the steam.

[0004] Regarding the aforementioned related technologies, the connection between the rotating shaft and the housing requires sealing to reduce the possibility of steam leakage and ensure steam compression efficiency. However, after the steam is compressed within the housing, the steam temperature rises, which can easily cause the housing temperature to rise. When the thermal expansion coefficient of the housing material is greater than that of the rotating shaft material, the gap between the rotating shaft and the peripheral wall of the rotating hole in the housing, which is used for rotational engagement with the rotating shaft, can easily increase, causing steam in the housing to leak at the location of the rotating shaft. Therefore, improvements are needed. Summary of the Invention

[0005] The purpose of the present application is to provide a steam compressor to reduce the possibility of expansion and deformation of the casing at the position of the rotating shaft due to heat, thereby reducing the risk of steam in the casing leaking at the position of the rotating shaft.

[0006] The steam compressor provided in this application adopts the following technical solution:

[0007] A steam compressor comprises a casing, a driving impeller located in the casing, a rotating shaft rotatably connected to the casing, and a driving motor for driving the rotating shaft to rotate, wherein the driving impeller is connected to the rotating shaft; the rotating shaft is provided with a gas collecting cylinder and a heat dissipation fan; the gas collecting cylinder is sleeved on the rotating shaft, and a gap for gas flow is provided between the mutually facing end walls of the gas collecting cylinder and the casing; the gas collecting cylinder is provided with a connecting rod, and the connecting rod is connected to the casing; the casing is provided with a plurality of heat dissipation fins, and the heat dissipation fins are located inside the area surrounded by the gas collecting cylinder; the heat dissipation fan is connected to the rotating shaft for blowing air into the gas collecting cylinder.

[0008] By adopting the above technical solution, when the driving motor drives the driving impeller to rotate through the rotating shaft, the cooling fan rotates synchronously to blow air into the air collecting cylinder; the air flowing into the air collecting cylinder contacts the heat sink so that the heat of the heat sink is transferred to the air, which is beneficial to lowering the temperature of the shell at the rotating shaft position and reducing the risk of expansion and deformation of the shell at the rotating shaft position, thereby helping to reduce the possibility of steam in the shell leaking at the rotating shaft position.

[0009] Optionally, the outer peripheral wall of the gas collecting cylinder is sleeved with a guide ring plate, and the guide ring plate is provided with a guide tube, and the guide tube is sleeved on the outer peripheral wall of the shell; gaps for gas flow are provided between the guide ring plate and the end wall of the shell, and between the inner peripheral wall of the guide tube and the outer peripheral wall of the shell.

[0010] By adopting the above technical solution, the gas discharged from the gas collecting cylinder can flow along the gap between the guide ring plate and the shell to the gap between the guide tube and the shell, and the gas in the gap between the guide tube and the shell can be discharged from the end of the guide tube away from the guide ring plate; during the flow of gas, the gas can further contact the outer wall of the shell to further cool the shell, thereby further reducing the possibility of expansion and deformation of the shell.

[0011] Optionally, a water outlet hole is provided on the outer peripheral wall of the lower side of the shell, and an inner wall of the water outlet hole is connected to a water outlet pipe; the water outlet pipe is connected to a sealing valve for controlling its on and off.

[0012] By adopting the above technical solution, the liquid liquefied after the high-temperature steam contacts the inner wall of the shell can flow along the inner wall of the shell to the lower side of the shell; by opening the sealing valve, the liquid can be discharged, thereby facilitating the recovery of the liquefied liquid and ensuring the relative dryness of the inside of the shell.

[0013] Optionally, a water collecting groove is provided on the inner peripheral wall of the lower side of the shell along the axial direction of the shell, and the water collecting groove is communicated with the water outlet.

[0014] By adopting the above technical solution, the water collecting tank can increase the opening of the water outlet hole, thereby facilitating the rapid flow of liquid into the water outlet hole and reducing the possibility of liquid being retained in the shell.

[0015] Optionally, the inner circumferential wall of the shell is provided with a connecting annular groove along its circumference, and the inner side wall of the connecting annular groove is connected to the inner side wall of the water collecting trough; the inner side wall of the connecting annular groove is provided with a flow partitioning groove along the axial direction of the shell, and a plurality of flow partitioning grooves are arranged in sequence at intervals along the circumference of the shell; the inner side wall of the flow partitioning groove is connected to the inner circumferential wall of the shell.

[0016] By adopting the above technical solution, the impeller is driven to rotate, which drives the gas located at the inner peripheral wall of the shell to move along the circumference of the shell, thereby driving the liquid at the inner peripheral wall of the shell to flow synchronously in the same direction; when the liquid flows into the flow partition groove, the inner wall of the flow partition groove can restrict the flow of the liquid along the circumference of the shell, allowing the liquid to flow into the connecting annular groove, thereby allowing the liquid to quickly flow into the water collection tank along the connecting annular groove. The connecting annular groove has a guiding effect on the flow of liquid, which helps to reduce the possibility of liquid dripping downward from the upper side of the shell, thereby helping to reduce the risk of corrosion of the driving impeller blades caused by the liquid contacting the driving impeller.

[0017] Optionally, the end of the flow isolation groove away from the connecting ring groove is inclined along the circumference of the shell; the inner wall of the shell located at the end of the flow isolation groove away from the connecting ring groove is provided with a guide ring groove along the circumference of the shell, the guide ring groove is communicated with the flow isolation groove, and the inner side wall of the guide ring groove is connected to the inner side wall of the water collecting groove.

[0018] By adopting the above technical solution, the flow partition groove is set at an angle, and the gas can drive the liquid in the flow partition groove along the inner wall of the flow partition groove to flow into the connecting annular groove or the guide annular groove, thereby reducing the possibility of liquid being retained in the flow partition groove.

[0019] Optionally, the inner peripheral wall of the shell is provided with a sealing ring plate for sealing the communicating ring groove, and a gap for liquid flow is provided between the sealing ring plate and the bottom wall of the flow isolation groove.

[0020] By adopting the above technical solution, the sealing ring plate can separate the gas flowing in the shell from the liquid in the connecting ring groove, so as to reduce the possibility of the gas flowing along the circumference of the shell interfering with the flow of the liquid in the connecting ring groove, thereby facilitating the rapid flow of the liquid in the connecting ring groove into the water collection tank.

[0021] Optionally, the water outlet pipe is connected to a water tank, the water tank is provided with a drain pipe, and the drain pipe is connected to a drain valve for controlling its on and off.

[0022] By adopting the above technical solution, when compressing steam, the drain valve can be closed and the sealing valve can be opened, so that the liquid in the shell can automatically flow into the water tank through the outlet pipe; when the water tank needs to be cleaned, the sealing valve is closed and then the drain valve is opened, and the liquid in the water tank can be discharged from the drain pipe, which is beneficial to reduce the possibility of leakage of steam in the shell during the liquid cleaning process.

[0023] Optionally, a guide plate is connected between the outer circumferential wall of the shell and the inner circumferential wall of the guide tube, the length direction of the guide plate is arranged along the axial direction of the guide tube, and multiple guide plates are arranged in sequence along the circumferential direction of the guide tube; a guide plate is provided at one end of the guide plate close to the guide ring plate, and the end of the guide plate away from the guide plate extends along the radial direction of the shell toward the air collecting tube.

[0024] By adopting the above technical solution, the guide vanes and the flow guide plate cooperate to form multiple flow channels for the gas discharged from the gas collection cylinder. This helps reduce the possibility of gas turbulence outside the housing, thereby accelerating the gas flow rate and improving the heat dissipation efficiency of the housing. At the same time, the guide vanes and the flow guide plate increase the heat exchange area between the housing and the air, further improving the heat dissipation efficiency of the housing.

[0025] Optionally, the length direction of the heat sink is arranged along the radial direction of the rotating shaft; all the heat sinks are arranged in sequence and spaced apart along the circumferential direction of the rotating shaft.

[0026] By adopting the above technical solution, air can flow toward the outside of the gas collecting cylinder along the gap between two adjacent heat sinks. The heat sink has a guiding effect on the flow direction of the gas, which is beneficial to increase the speed of air flow, thereby improving the heat dissipation efficiency of the shell.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the drive motor drives the drive impeller to rotate via the rotating shaft, the cooling fan rotates synchronously to blow air into the gas cylinder. The air flowing into the gas cylinder contacts the heat sink, allowing the heat from the heat sink to be transferred to the air, thereby helping to reduce the temperature of the housing at the rotating shaft position, reducing the risk of expansion and deformation of the housing at the rotating shaft position, and thus helping to reduce the possibility of steam in the housing leaking at the rotating shaft position.

[0029] 2. The flow isolation groove, guide ring groove, connecting ring groove and blocking ring plate cooperate with each other to facilitate the rapid flow of liquid on the inner peripheral wall of the shell into the water collection groove, which helps to reduce the possibility of liquid dripping downward from the upper side of the shell, thereby reducing the risk of corrosion of the driving impeller blades caused by the contact between the liquid and the driving impeller;

[0030] 3. The guide vanes and deflectors work together to form multiple flow channels for the gas discharged from the gas collection cylinder. This helps reduce the possibility of gas turbulence outside the housing, thereby accelerating the gas flow rate and improving the heat dissipation efficiency of the housing. At the same time, the guide vanes and deflectors increase the heat exchange area between the housing and the air, further improving the heat dissipation efficiency of the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of a steam compressor according to an embodiment of the present application.

[0032] Figure 2 It is a cross-sectional schematic diagram used to show the internal structure of the shell.

[0033] Figure 3 It is a schematic diagram used to show the internal structure of the guide tube.

[0034] Figure 4 yes Figure 2 Enlarged view of part A in .

[0035] Figure 5 It is a cross-sectional diagram showing the internal structure of the casing after removing the driving impeller and sealing ring plate.

[0036] In the figure, 1. base; 2. shell; 21. rotating hole; 22. air inlet; 221. air inlet pipe; 23. air outlet; 231. air outlet pipe; 24. heat sink; 25. water collecting trough; 251. water outlet; 26. connecting ring groove; 261. flow partition groove; 27. guide ring groove; 28. sealing ring plate; 3. driving motor; 4. gear transmission; 5. driving impeller; 6. rotating shaft; 61. air collecting cylinder; 611. connecting rod; 612. guide ring plate; 613. guide cylinder; 614. guide plate; 615. guide plate; 616. clearance groove; 62. cooling fan; 7. water outlet pipe; 71. sealing valve; 8. water storage tank; 81. drain pipe; 811. drain valve. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0038] A steam compressor, referring to Figure 1 and Figure 2 , comprising a base 1, a housing 2, a drive motor 3, a gear transmission 4, a drive impeller 5, and a rotating shaft 6. The housing 2 is cylindrical with a hollow interior. The axial direction of the housing 2 is arranged along the length direction of the base 1, and the housing 2 is fixedly connected to the upper surface of one end of the base 1 via a bracket. The drive motor 3 and the gear transmission 4 are both fixedly connected to the upper surface of the base 1 via bolts. The drive motor 3 is located on the side of the gear transmission 4 away from the housing 2. The output shaft of the drive motor 3 is connected to the input shaft of the gear transmission 4 to drive the output shaft of the gear transmission 4 to rotate.

[0039] Reference Figure 1 and Figure 2The end wall of the housing 2 facing the gear transmission 4 is provided with a rotation hole 21 extending through the housing 2 along its own axial direction. The rotation hole 21 is coaxial with the housing 2. One end of the rotation shaft 6 is inserted through the rotation hole 21 and is rotatably connected to the inner circumferential wall of the rotation hole 21 via a bearing. The end wall of the housing 2 away from the rotation hole 21 is provided with an air inlet hole 22 extending through the end wall. The air inlet hole 22 is coaxial with the housing 2. An air inlet pipe 221 is welded and fixed to the inner circumferential wall of the air inlet hole 22. An air outlet hole 23 is provided through the inner circumferential wall of the housing 2. An air outlet pipe 231 is welded and fixed to the inner circumferential wall of the air outlet hole 23. The driving impeller 5 is located inside the housing 2 and is coaxially fixed to the rotation shaft 6. One end of the rotating shaft 6 located outside the housing 2 rotates with the output shaft of the gear transmission 4 through a coupling, so that the output shaft of the gear transmission 4 drives the rotating shaft 6 to rotate, thereby rotating the driving impeller 5, so that steam can flow into the housing 2 through the air inlet pipe 221; the steam is compressed in the housing 2 and discharged through the air outlet pipe 231.

[0040] Reference Figure 2 The rotating shaft 6 is provided with an air collecting cylinder 61 and a heat dissipation fan 62, and both the air collecting cylinder 61 and the heat dissipation fan 62 are located between the housing 2 and the gear transmission 4. The air collecting cylinder 61 is coaxially sleeved on the rotating shaft 6, and a gap is provided between the end walls of the air collecting cylinder 61 and the housing 2 facing each other; a connecting rod 611 is welded and fixed to the outer peripheral wall of the air collecting cylinder 61 near one end of the housing 2, and the connecting rod 611 is welded and fixed to the end wall of the housing 2 to fix the air collecting cylinder 61. The heat dissipation fan 62 is coaxially keyed to the rotating shaft 6, and the heat dissipation fan 62 is located inside the air collecting cylinder 61; when the rotating shaft 6 rotates, the rotating shaft 6 can drive the heat dissipation fan 62 to rotate, so that the low-temperature air outside the air collecting cylinder 61 can flow into the air collecting cylinder 61; the gas flowing into the air collecting cylinder 61 can flow out from the gap between the air collecting cylinder 61 and the housing 2, so that the heat of the housing 2 at the position of the rotating shaft 6 is dissipated, reducing the possibility of expansion and deformation at the corresponding position of the housing 2.

[0041] Reference Figure 2 A heat sink 24 is welded to the end wall of the housing 2 facing the gas collecting cylinder 61. The heat sink 24 is located within the area enclosed by the gas collecting cylinder 61. The length of the heat sink 24 is arranged radially along the housing 2, and multiple heat sinks 24 are arranged sequentially and spaced apart along the circumference of the rotating shaft 6. The heat sink 24 is used to transfer heat from the housing 2, thereby improving the heat dissipation efficiency of the housing 2.

[0042] Reference Figure 2 and Figure 3The outer circumferential wall of the gas collecting cylinder 61 is sleeved with a guide ring plate 612, and the inner circumferential wall of the guide ring plate 612 is sealed and welded to the outer circumferential wall of the gas collecting cylinder 61. A guide tube 613 is provided on the side of the guide ring plate 612 close to the housing 2. The guide tube 613 is coaxial with the guide ring plate 612, and the end wall of the guide tube 613 is sealed and welded to the end wall of the guide ring plate 612. A guide plate 614 is welded and fixed to the inner circumferential wall of the guide tube 613, and a plurality of guide plates 614 are arranged in sequence at intervals along the circumference of the guide tube 613; the length direction of the guide plate 614 is arranged along the axial direction of the shell 2, and a guide plate 615 is welded and fixed to the end of the guide plate 614 close to the guide ring plate 612, and the end of the guide plate 615 away from the guide plate 614 extends along the radial direction of the guide ring plate to the axial direction of the guide ring plate 612, and the guide plate 615 is welded and fixed to the end wall of the guide ring plate 612.

[0043] Reference Figure 2 and Figure 3 The guide vanes 614 and 615 are arranged along the circumference of the guide tube 613 in their thickness direction. A recess 616 is provided on the end wall of the guide tube 613 away from the air collecting tube 61 to accommodate the air outlet pipe 231 and the bracket of the housing 2. This allows the guide tube 613 to be sleeved onto the outer circumferential wall of the housing 2, so that the sidewalls of the guide vanes 614 facing the axis of the guide tube 613 mate with the outer circumferential wall of the housing 2, and the sidewalls of the guide vanes 615 facing the housing 2 mate with the end wall of the housing 2. Air flowing out of the air collecting tube 61 can flow along the gaps between adjacent guide vanes 615 to the outer circumferential wall of the housing 2 and be discharged from the end of the guide tube 613 away from the guide ring plate 612, further dissipating heat from the housing 2.

[0044] Reference Figure 2 and Figure 4 A water collecting trough 25 is formed on the inner circumferential wall of the lower side of the shell 2 along the axial direction of the shell 2. A water outlet hole 251 is formed downwardly through the bottom wall of the water collecting trough 25. A water outlet pipe 7 is inserted into the water outlet hole 251, and the outer circumferential wall of the water outlet pipe 7 is welded and fixed to the inner circumferential wall of the water outlet hole 251. A sealing valve 71 is installed on the end of the water outlet pipe 7 away from the water outlet hole 251. The sealing valve 71 is connected to the water storage tank 8 via a pipeline. A drain pipe 81 is welded and fixed to the outer wall of the lower end of the water storage tank 8. The interior of the drain pipe 81 is connected to the interior of the water storage tank 8. A drain valve 811 is installed on the end of the drain pipe 81 away from the water storage tank 8. Both the sealing valve 71 and the drain valve 811 are ball valves. When the sealing valve 71 is opened and the drain valve 811 is closed, the liquid liquefied from the steam at the inner circumferential wall of the shell 2 can flow into the water storage tank 8 through the water outlet pipe 7. When the water tank 8 needs to be cleaned, the sealing valve 71 is closed and the drain valve 811 is opened to drain the liquid in the water tank 8.

[0045] Reference Figure 5The inner circumferential wall of the housing 2 is formed with a connecting annular groove 26 and a flow-guiding annular groove 27 along the circumference of the housing 2. The connecting annular groove 26 is located at one end of the housing 2, and the flow-guiding annular groove 27 is located at the other end of the housing 2. Both ends of the connecting annular groove 26 and the flow-guiding annular groove 27 are connected to the water collecting trough 25. A flow-dividing groove 261 is formed on the inner sidewall of the connecting annular groove 26 on the side closest to the flow-guiding annular groove 27. The end of the flow-dividing groove 261, which is remote from the connecting annular groove 26, extends in the axial direction of the housing 2 toward the flow-guiding annular groove 27 and is arranged obliquely along the circumference of the housing 2. The interior of the flow-dividing groove 261 is connected to the interior of the flow-guiding annular groove 27. A plurality of flow-dividing grooves 261 are provided at intervals along the circumference of the housing 2.

[0046] Reference Figure 4 and Figure 5 A sealing ring plate 28 is embedded at the mouth of the connecting annular groove 26 and the guide annular groove 27. The sealing ring plate 28 is welded to the inner sidewall of the corresponding connecting annular groove 26 or guide annular groove 27 to seal the corresponding connecting annular groove 26 or guide annular groove 27. A gap is provided between the sealing ring plate 28 and the bottom wall of the flow separation groove 261 to allow liquid flowing into the flow separation groove 261 to flow along the flow separation groove 261 into the connecting annular groove 26 or guide annular groove 27, thereby allowing the liquid to quickly flow into the water collection trough 25.

[0047] The implementation principle of the embodiment of this application is:

[0048] When the rotating shaft 6 drives the driving impeller 5 to rotate, the cooling fan 62 rotates synchronously, so that the low-temperature air outside the air collecting cylinder 61 flows into the air collecting cylinder 61; the low-temperature air flowing into the air collecting cylinder 61 contacts the heat sink 24 to absorb the heat of the shell 2; the heated air is discharged from the gap between the air collecting cylinder 61 and the shell 2, so that the heat of the shell 2 at the position of the rotating shaft 6 is dissipated, so as to reduce the possibility of expansion and deformation of the shell 2 at the position of the rotating shaft 6, thereby helping to reduce the risk of steam in the shell 2 leaking at the position of the rotating shaft 6.

[0049] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A steam compressor comprising a housing (2), a driving impeller (5) located in the housing (2), a rotating shaft (6) rotatably connected to the housing (2), and a driving motor (3) for driving the rotating shaft (6) to rotate, wherein the driving impeller (5) is connected to the rotating shaft (6); characterized in that: The rotating shaft (6) is provided with a gas collecting cylinder (61) and a heat dissipation fan (62); the gas collecting cylinder (61) is sleeved on the rotating shaft (6), and a gap for gas flow is provided between the end walls of the gas collecting cylinder (61) and the shell (2) facing each other; the gas collecting cylinder (61) is provided with a connecting rod (611), and the connecting rod (611) is connected to the shell (2); the shell (2) is provided with a plurality of heat dissipation fins (24), and the heat dissipation fins (24) are located The cooling fan (62) is connected to the rotating shaft (6) to blow air into the air collecting cylinder (61); the outer peripheral wall of the air collecting cylinder (61) is sleeved with a guide ring plate (612), the guide ring plate (612) is provided with a guide tube (613), and the guide tube (613) is sleeved on the outer peripheral wall of the shell (2); between the guide ring plate (612) and the end wall of the shell (2), the guide tube (613) A gap for gas flow is provided between the inner peripheral wall of the housing (2) and the outer peripheral wall of the housing (2); a water outlet hole (251) is provided on the outer peripheral wall of the lower side of the housing (2); an outlet pipe (7) is connected to the inner side wall of the outlet hole (251); a sealing valve (71) for controlling the on and off of the outlet pipe (7) is connected to the outlet pipe (7); a water collecting trough (25) is provided on the inner peripheral wall of the lower side of the housing (2) along the axial direction of the housing (2); the water collecting trough (25) is connected to the outlet hole ( 251); the inner peripheral wall of the shell (2) is provided with a connecting annular groove (26) along its circumference, and the inner side wall of the connecting annular groove (26) is connected to the inner side wall of the water collecting groove (25); the inner side wall of the connecting annular groove (26) is provided with a flow dividing groove (261) along the axial direction of the shell (2), and a plurality of the flow dividing grooves (261) are sequentially spaced along the circumference of the shell (2); the inner side wall of the flow dividing groove (261) is connected to the inner peripheral wall of the shell (2).

2. The steam compressor according to claim 1, characterized in that: The end of the flow partition groove (261) away from the connecting annular groove (26) is arranged obliquely along the circumference of the shell (2); the inner peripheral wall of the shell (2) located at the position of the end of the flow partition groove (261) away from the connecting annular groove (26) is provided with a flow guide annular groove (27) along the circumference of the shell (2), the flow guide annular groove (27) is communicated with the flow partition groove (261), and the inner side wall of the flow guide annular groove (27) is connected to the inner side wall of the water collecting trough (25).

3. The steam compressor according to claim 1, wherein: The inner peripheral wall of the housing (2) is provided with a sealing ring plate (28) for sealing the communicating ring groove (26), and a gap for liquid flow is provided between the sealing ring plate (28) and the bottom wall of the flow isolation groove (261).

4. The steam compressor according to claim 1, wherein: The water outlet pipe (7) is connected to a water storage tank (8), the water storage tank (8) is provided with a drainage pipe (81), and the drainage pipe (81) is connected to a drainage valve (811) for controlling the on and off of the drainage pipe.

5. The steam compressor according to claim 1, wherein: A guide plate (614) is connected between the outer peripheral wall of the shell (2) and the inner peripheral wall of the guide cylinder (613). The length direction of the guide plate (614) is arranged along the axial direction of the guide cylinder (613). A plurality of guide plates (614) are arranged in sequence and at intervals along the circumference of the guide cylinder (613). A guide plate (615) is provided at one end of the guide plate (614) close to the guide ring plate (612). The guide plate (615) is extended along the radial direction of the shell (2) toward the gas collecting cylinder (61) at one end away from the guide plate (614).

6. The steam compressor according to claim 1, wherein: The length direction of the heat sink (24) is arranged along the radial direction of the rotating shaft (6); all the heat sinks (24) are arranged in sequence at intervals along the circumference of the rotating shaft (6).

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