CN220622245U - Pressure-adjustable sealer of vacuum compressor and vacuum compressor - Google Patents
Pressure-adjustable sealer of vacuum compressor and vacuum compressor Download PDFInfo
- Publication number
- CN220622245U CN220622245U CN202321770839.4U CN202321770839U CN220622245U CN 220622245 U CN220622245 U CN 220622245U CN 202321770839 U CN202321770839 U CN 202321770839U CN 220622245 U CN220622245 U CN 220622245U
- Authority
- CN
- China
- Prior art keywords
- pressure
- labyrinth seal
- vacuum compressor
- labyrinth
- volute
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 238000010248 power generation Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to the technical field of pressure-adjustable sealers, in particular to a pressure-adjustable sealer of a vacuum compressor and the vacuum compressor. The labyrinth seal solves the problem that the existing labyrinth seal cannot ensure that the external gas pressure and the gas pressure in the volute flow channel reach a proper pressure difference in the sealing process. The pressure-adjustable sealer of the vacuum compressor comprises a volute and a main shaft which is rotatably arranged in the volute in a penetrating way, a labyrinth sealing ring is arranged between the main shaft and the volute, a pressure detection device for detecting the pressure of a volute flow channel of the volute is arranged on the volute, a sealing gas inlet hole which is arranged from outside to inside in the radial direction of the labyrinth sealing ring is arranged on the labyrinth sealing ring, the sealing gas inlet hole is communicated with a labyrinth air channel of the labyrinth sealing ring, and the sealing gas inlet hole is connected with a compressed air input device. The application has the advantages that: the pressure difference between the external gas pressure and the gas in the volute runner is suitable, and the benefit maximization is realized by avoiding the gas leakage.
Description
Technical Field
The utility model relates to the technical field of pressure-adjustable sealers, in particular to a pressure-adjustable sealer of a vacuum compressor and the vacuum compressor.
Background
The existing vacuum compressor is generally provided with a labyrinth seal in the volute, and the labyrinth seal needs to be assisted by external gas in the sealing process to achieve the sealing effect, but the labyrinth seal cannot ensure that the external gas pressure and the gas pressure in the flow channel of the volute reach a proper pressure difference in the sealing process, and the conditions of gas leakage and the like exist, and the external gas needs to be continuously injected to keep pressure phase adaptation, so that waste is caused, and the gas cannot be ensured not to leak.
For example, chinese patent discloses an organic working medium centripetal turbine power generation device chinese patent No. [ CN201410697167.8 ], an organic working medium centripetal turbine power generation device, characterized in that the power generation device comprises a centripetal turbine, a speed reducer and a generator connected in sequence; the output shaft of the centripetal turbine and the high-speed end of the speed reducer share a main shaft, so that an impeller of the centripetal turbine and the high-speed end of the speed reducer form a cantilever structure, and the generator is driven by the low-speed shaft end of the speed reducer; the centripetal turbine converts organic working medium heat energy into mechanical energy, the speed reducing device converts the mechanical energy into rated rotational speed mechanical energy of the generator, and the generator converts the rated rotational speed mechanical energy into electric energy; the impeller of the centripetal turbine is arranged at one end of the main shaft, a sealing device is arranged on the outer circumference of the main shaft, which is close to the back of the wheel disc of the impeller, another sealing device is arranged on the outer circumference of the main shaft, which is separated from the sealing carbon ring by a certain distance, and a shell is arranged between the two sealing devices to form a closed cavity. The scheme shortens the axial length of the centripetal turbine and the reduction gearbox, so that the system structure is more compact. Meanwhile, the problem of sealing the high-rotation-speed shaft end which needs to be strictly sealed is relieved through multiple aspects, and finally the problem is transferred to the sealing of the low-rotation-speed shaft end of the speed reducer, so that the complexity of the shaft end sealing device is greatly reduced, and the maintenance is convenient.
Although the above solution has the advantages, the problem of gas leakage is not solved, in which the labyrinth seal ensures that the external gas pressure and the gas pressure in the volute flow passage reach a suitable pressure difference during the sealing process.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a pressure-adjustable sealer of a vacuum compressor and the vacuum compressor for solving the technical problems.
The aim of the utility model can be achieved by the following technical scheme:
the pressure-adjustable sealer of the vacuum compressor comprises a volute and a main shaft rotatably penetrating the volute, wherein a labyrinth seal ring is arranged between the main shaft and the volute, a pressure detection device for detecting the pressure of a volute runner of the volute is arranged on the volute, a sealing gas inlet hole is formed in the labyrinth seal ring from the radial direction of the labyrinth seal ring to the inside, the sealing gas inlet hole is communicated with a labyrinth air passage of the labyrinth seal ring, and the sealing gas inlet hole is connected with a compressed air input device.
In the pressure-adjustable sealer of the vacuum compressor, the labyrinth seal ring is further provided with an exhaust gas return hole from outside to inside in the radial direction, and the exhaust gas return hole is communicated with the labyrinth air passage of the labyrinth seal ring.
The pressure-adjustable sealer of the vacuum compressor comprises a cylindrical labyrinth sealing part, wherein one end of the outer wall of the cylindrical labyrinth sealing part is provided with a radial outward extension annular part, the part of the cylindrical labyrinth sealing part is arranged between the main shaft and the volute, and the radial outward extension annular part is propped against one end surface of the volute far away from the volute runner.
In the pressure-adjustable sealer of the vacuum compressor, the axial lead of the sealing air inlet and the axial lead of the labyrinth seal are inclined.
The pressure-adjustable sealer of the vacuum compressor, wherein the sealing air inlet hole comprises a large hole body arranged on the radial outward extending annular part, the cylindrical labyrinth sealing part is provided with a small hole body communicated with the large hole body, and the small hole body is communicated with the labyrinth air passage.
In the pressure-adjustable sealer of the vacuum compressor, the axial lead of the exhaust gas return hole and the axial lead of the labyrinth seal ring are right angles.
In the pressure-adjustable sealer of the vacuum compressor, the compressed air input device comprises an air inlet pipeline connected with the sealing air inlet hole, and an electric control regulating valve is arranged on the air inlet pipeline.
In the pressure-adjustable sealer of the vacuum compressor, the pressure detection device is a differential pressure transmitter, and the differential pressure transmitter and the electric control regulating valve are respectively connected with the PLC.
A vacuum compressor comprising the pressure-adjustable sealer of any one of the above vacuum compressors.
Compared with the prior art, the pressure-adjustable sealer of the vacuum compressor has the following beneficial effects:
the problem that the pressure of compressed gas and the gas pressure in the volute runner cannot reach a proper pressure difference is solved, and the maximization of the benefit of achieving the gas pressure by the lowest compressed gas is avoided.
Drawings
Fig. 1 is a schematic view of a pressure-adjustable sealer of a vacuum compressor according to an embodiment of the present utility model.
Fig. 2 is a partial schematic view of fig. 1.
Fig. 3 is another partial schematic view of fig. 1.
Fig. 4 is a partial schematic view of fig. 2.
In the figure, a volute 1, a main shaft 2, a labyrinth seal 3, a seal gas inlet hole 31, a large hole body 311, a small hole body 312, a labyrinth air passage 32, an exhaust gas return hole 33, a cylindrical labyrinth seal part 34, a radially outward extending annular part 341, a pressure detection device 4, a compressed air input device 5, an electric control regulating valve 6 and a PLC controller 7.
Detailed Description
The following are specific embodiments of the utility model and the technical solutions of the utility model will be further described with reference to the accompanying drawings, but the utility model is not limited to these embodiments.
Example 1
As shown in fig. 1 to 4, the pressure-adjustable sealer of the vacuum compressor comprises a volute 1 and a main shaft 2 rotatably penetrating the volute 1, a labyrinth seal 3 is arranged between the main shaft 2 and the volute 1, a pressure detection device 4 for detecting the pressure of a volute runner 11 of the volute 1 is arranged on the volute 1, a sealing gas inlet hole 31 which is arranged from outside to inside in the radial direction of the labyrinth seal 3 is arranged on the labyrinth seal 3, the sealing gas inlet hole 31 is communicated with a labyrinth air passage 32 of the labyrinth seal 3, and the sealing gas inlet hole 31 is connected with a compressed air input device 5. Specifically, in this embodiment, the pressure in the volute flow channel 11 is detected by the pressure detecting device 4, and the pressure in the volute flow channel 11 is fed back to the compressed air input device 5, the compressed air input device 5 is communicated with the labyrinth air channel 32 through the sealing air inlet hole 31, and compressed air is injected into the volute flow channel 11, so that the external air pressure and the air pressure in the volute flow channel are kept to reach a proper pressure difference, and the conditions of leakage and the like are avoided.
In order to realize exhaust gas discharge in the volute flow passage 11, as shown in fig. 1 and 2, an exhaust gas return hole 33 is further formed in the radial direction of the labyrinth seal ring 3 from outside to inside, and the exhaust gas return hole 33 is communicated with the labyrinth air passage of the labyrinth seal ring 3.
In order to realize the sealing treatment between the main shaft 2 and the scroll casing 1, as shown in fig. 1 to 4, the labyrinth seal 3 includes a cylindrical labyrinth seal portion 34, a radially outwardly extending annular portion 341 is provided at one end of the outer wall of the cylindrical labyrinth seal portion 34, a portion of the cylindrical labyrinth seal portion 34 is provided between the main shaft 2 and the scroll casing 1, and the radially outwardly extending annular portion 341 abuts against an end face of the scroll casing 1 remote from the scroll casing flow passage 11.
In order to facilitate the compressed air input device 5 to input compressed air, specifically, in this embodiment, the axis of the sealing air inlet hole 31 and the axis of the labyrinth seal 3 form an inclination angle.
To achieve the input of the control input compressed air, as shown in fig. 1, 2 and 4, the seal air intake hole 31 includes a large hole body 311 provided on a radially outwardly extending annular portion 341, and a small hole body 312 communicating with the large hole body 311 is provided on the cylindrical labyrinth seal portion 34, and the small hole body 312 communicates with the labyrinth air passage 32. The large hole body 311 is used for well guiding compressed air, meanwhile, as the hole opening of the large hole body 311 is larger and not distinguished from the input amount of the compressed air to be controlled, the method of communicating the small hole body 312 and the small hole body 312 with the labyrinth air passage 32 through the small hole body 312 communicated with the large hole body 311 is combined, so that the input amount of the compressed air to be input into the volute flow passage 11 is well controlled, the condition that the compressed air is input too much or too little is avoided, and the good air pressure difference between the external air pressure and the inside of the volute flow passage is ensured.
In order to facilitate exhaust, in particular, the axis of the exhaust gas return hole 33 of this embodiment is perpendicular to the axis of the labyrinth seal 3.
For accurate input of compressed air, the compressed air input device 5 comprises an air inlet pipeline connected with a sealing air inlet hole 31, and an electric control regulating valve 6 is arranged on the air inlet pipeline, so that good pressure difference between external air pressure and the interior of a volute runner is kept, as shown in fig. 1 and 2.
In order to provide good feedback of the air pressure in the scroll flow passage 11, as shown in fig. 1 to 4, the pressure detecting device 4 is a differential pressure transmitter, and the differential pressure transmitter and the electrically controlled regulating valve 6 are respectively connected with the PLC controller 7. The pressure difference transmitter feeds back the air pressure condition in the volute flow channel 11 to the PLC controller 7, and the PLC controller 7 realizes the adjustment of the electric control regulating valve 6, so that the compressed air needs to pass through the electric control regulating valve 6 according to the quantity to avoid the condition that the input quantity of the compressed air exceeds or is not full.
The problem that the pressure of compressed gas and the gas pressure in the volute runner cannot reach a proper pressure difference is solved, and the maximization of the benefit of achieving the gas pressure by the lowest compressed gas is avoided.
Design principle of pressure adjustable sealer of vacuum compressor:
through the pressure detection device 4 that is equipped with spiral case runner 11 pressure on spiral case 1, pressure detection device 4 detects the pressure in the spiral case runner 11 to with signal transmission to PLC controller 7, PLC controller 7 is with the signal feedback to automatically controlled governing valve 6, and automatically controlled governing valve 6 adjusts compressed air input device 5 air input volume, in order to with the air input spiral case runner 11 for spiral case runner 11 pressure reaches a suitable pressure differential with compressed air's gas pressure.
Example two
As shown in fig. 1 to 4, the vacuum compressor includes the pressure-adjustable sealer of the vacuum compressor of the first embodiment described above.
Through the pressure detection device 4 that is equipped with spiral case runner 11 pressure on spiral case 1, pressure detection device 4 detects the pressure in the spiral case runner 11 to with signal transmission to PLC controller 7, PLC controller 7 is with the signal feedback to automatically controlled governing valve 6, and automatically controlled governing valve 6 adjusts compressed air input device 5 air input volume, in order to with the air input spiral case runner 11 for spiral case runner 11 pressure reaches a suitable pressure differential with compressed air's gas pressure.
Although terms of the scroll casing 1, the main shaft 2, the labyrinth seal 3, the seal gas intake hole 31, the large hole body 311, the small hole body 312, the labyrinth air passage 32, the exhaust gas return hole 33, the cylindrical labyrinth seal portion 34, the radially outwardly extending annular portion 341, the pressure detecting device 4, the compressed air input device 5, the electrically controlled regulating valve 6, the PLC controller 7, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the utility model; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Claims (9)
1. The utility model provides a vacuum compressor's pressure adjustable sealer, includes spiral case (1) and rotatory wears to locate main shaft (2) in spiral case (1) main shaft (2) with be equipped with labyrinth seal (3) between spiral case (1), its characterized in that be equipped with on spiral case (1) and detect spiral case runner (11) pressure's of spiral case (1) pressure detection device (4) be equipped with on labyrinth seal (3) follow radial outside-in sealing gas inlet port (31) that set up of labyrinth seal (3), sealing gas inlet port (31) with labyrinth air flue (32) intercommunication of labyrinth seal (3), sealing gas inlet port (31) are connected with compressed air input device (5).
2. The pressure-adjustable sealer of the vacuum compressor according to claim 1, characterized in that an exhaust gas return hole (33) is further provided in the radial direction of the labyrinth seal (3) from outside to inside, and the exhaust gas return hole (33) communicates with a labyrinth air passage of the labyrinth seal (3).
3. Pressure adjustable sealer of vacuum compressor according to claim 1, characterized in that the labyrinth seal (3) comprises a cylindrical labyrinth seal portion (34), a radially outwardly extending annular portion (341) is provided at one end of the outer wall of the cylindrical labyrinth seal portion (34), a portion of the cylindrical labyrinth seal portion (34) is provided between the main shaft (2) and the scroll casing (1), and the radially outwardly extending annular portion (341) abuts against an end face of the scroll casing (1) remote from the scroll casing flow passage (11).
4. Pressure-adjustable sealer of a vacuum compressor according to claim 1, characterized in that the axis of the sealing air inlet hole (31) and the axis of the labyrinth seal (3) are inclined.
5. A pressure adjustable sealer of a vacuum compressor according to claim 3, characterized in that the sealing air inlet hole (31) comprises a large hole body (311) provided on the radially outward extending annular portion (341), a small hole body (312) communicating with the large hole body (311) is provided on the cylindrical labyrinth seal portion (34), and the small hole body (312) communicates with the labyrinth air passage (32).
6. Pressure-adjustable sealer of a vacuum compressor according to claim 2, characterized in that the axis of the exhaust gas return hole (33) is at right angles to the axis of the labyrinth seal (3).
7. Pressure-adjustable sealer of a vacuum compressor according to claim 1, characterized in that the compressed air input device (5) comprises an air intake pipe connected with the sealing air intake hole (31), on which an electrically controlled regulating valve (6) is provided.
8. The pressure-adjustable sealer of a vacuum compressor according to claim 7, characterized in that the pressure detecting device (4) is a differential pressure transmitter, and the differential pressure transmitter and the electrically controlled regulating valve (6) are respectively connected with a PLC controller (7).
9. A vacuum compressor comprising the pressure-adjustable sealer of the vacuum compressor according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321770839.4U CN220622245U (en) | 2023-07-06 | 2023-07-06 | Pressure-adjustable sealer of vacuum compressor and vacuum compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321770839.4U CN220622245U (en) | 2023-07-06 | 2023-07-06 | Pressure-adjustable sealer of vacuum compressor and vacuum compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220622245U true CN220622245U (en) | 2024-03-19 |
Family
ID=90223297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321770839.4U Active CN220622245U (en) | 2023-07-06 | 2023-07-06 | Pressure-adjustable sealer of vacuum compressor and vacuum compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220622245U (en) |
-
2023
- 2023-07-06 CN CN202321770839.4U patent/CN220622245U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105156156B (en) | Turbine decompression power set and turbine decompression unit | |
| CN220622245U (en) | Pressure-adjustable sealer of vacuum compressor and vacuum compressor | |
| CN113669456B (en) | Sealing device for preventing microwave leakage of rubber desulfurization stirring mechanism | |
| CN201232657Y (en) | High wind pressure sealed volute aerator | |
| CN110671501A (en) | Structure for sealing pyrolysis gas by adopting labyrinth | |
| CN105626570B (en) | A kind of hydrogen turbine pump | |
| CN102434215B (en) | Outer-rotor fluid power machine | |
| CN105298633A (en) | Adjustable type exhaust gas turbocharger | |
| CN207500115U (en) | Screw type water steam compression system | |
| CN214577497U (en) | Mixed-flow water turbine with good vibration reduction effect | |
| CN207500002U (en) | A kind of gas turbine Pneumatic drive system | |
| CN207975040U (en) | A kind of water pump cover | |
| CN219573651U (en) | High-pressure mining device | |
| CN201636043U (en) | Supercharger | |
| CN218760040U (en) | Steam turbine valve point optimizing control device | |
| CN217874710U (en) | Full-automatic rotary air pipe loop mechanism | |
| CN207111513U (en) | A kind of metal centrifuges pump half-opened impeller | |
| CN219975343U (en) | Waterproof structure of high-rotation-speed independent spindle | |
| CN114278575B (en) | Centrifugal pump with intelligent exhaust function | |
| CN112539282B (en) | Adjustable baffle valve for gas turbine air intake system | |
| CN215486180U (en) | A prevent rotor shaft end lubricating oil extravasation device for TRT | |
| CN221257680U (en) | Powder conveying rotary valve capable of adjusting gas flow | |
| CN219673412U (en) | Gas balance regulating valve | |
| CN217234401U (en) | Shaft end negative pressure sealing device | |
| CN216429682U (en) | High-speed blast furnace gas energy recovery turbine for industrial dragging |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |