CN210509298U - Improved high-efficiency radial turbine distributed residual pressure power generation system - Google Patents
Improved high-efficiency radial turbine distributed residual pressure power generation system Download PDFInfo
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- CN210509298U CN210509298U CN201920784114.8U CN201920784114U CN210509298U CN 210509298 U CN210509298 U CN 210509298U CN 201920784114 U CN201920784114 U CN 201920784114U CN 210509298 U CN210509298 U CN 210509298U
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Abstract
The utility model discloses a high-efficient radial turbine distributing type afterpressure power generation system of modified for solve the balanced and lower problem of efficiency of axial force of single-stage impeller among the distributing type radial turbine afterpressure power generation system who contains static pressure air supporting bearing. The system comprises a turbine, wherein the turbine comprises a seal sleeve, nozzle ring blades, a volute, a main shaft, an impeller shaft sleeve, an impeller and a diffusion chamber; the impeller is sleeved on the outer side of the main shaft, the impeller shaft sleeve is positioned on the back side of the impeller, the impeller shaft sleeve and the impeller are of an integrated structure, the sealing sleeve is sleeved on the outer side of the impeller shaft sleeve, the volute is communicated with the impeller through the nozzle ring blades, and the impeller is communicated with the diffusion chamber. The utility model discloses a single-stage impeller adds the integrated design of axle sleeve, can reduce the atress area of axial force and guarantee axle sleeve and impeller synchronous operation to improve the stability and the efficiency of radial turbine distributing type excess pressure power generation system operation.
Description
Technical Field
The utility model belongs to the technical field of contain static pressure air supporting bearing's radial turbine distributing type afterpressure electricity generation, mainly be applied to the axial force of solving among the distributing type radial turbine afterpressure electricity generation system that contains static pressure air supporting bearing balanced and the lower problem of efficiency of single-stage impeller.
Background
In recent years, active recycling of secondary energy has become an effective measure for reducing energy consumption, saving energy, and reducing cost. The recycling of the residual pressure and the residual heat is one of the effective important means. The residual pressure power generation technology mainly utilizes the pressure difference energy and the heat energy of natural gas or steam in the pressure reduction and temperature reduction processes to drive a turboexpander to do work, converts the work into mechanical energy, and drives a generator to generate power so as to realize energy conversion and output electric energy.
In a distributed energy system, the situation that the parameters of both suppliers and suppliers are not matched often exists, and a common solution in the prior art is to reduce the parameters of the suppliers to the parameters required by a user side through a temperature and pressure reducing valve. Although the problem of mismatching of parameters of both supply and supply can be solved by using the temperature and pressure reducing valve, exergy of supplied steam is reduced, the steam work capacity is wasted, and the phenomenon causes avoidable unnecessary waste from the energy utilization point of view. At present, medium and small flow of superheated steam exists in a distributed energy station, a supplier needs to provide high-pressure superheated steam, and a user needs to use low-pressure superheated steam. Because the steam flow is small, if the radial turbine containing the static pressure air bearing adopts a double-stage impeller to do work, the rotating speed of the motor is greatly increased, which increases the difficulty of manufacturing and controlling the motor, for example, the Chinese patent with the application number of 200920245322.7; if the radial turbine containing the static pressure air bearing adopts a single-stage impeller to do work, the requirement on the rotating speed of the motor is reduced, which is beneficial to the application and popularization of the distributed residual pressure power generation technology based on the radial turbine and brings considerable economic benefit.
SUMMERY OF THE UTILITY MODEL
The radial turbine distributing type overbottom pressure power generation system who contains static pressure air supporting bearing to middle and small steam flow adopts the unbalanced and inefficiency problem of axial force when single-stage impeller, the utility model discloses an improved high-efficient radial turbine distributing type overbottom pressure power generation system has been provided to single-stage impeller, is used for reducing the axial atress area of system and guarantees axle sleeve and the synchronous high-speed operation of impeller to improve radial turbine distributing type overbottom pressure power generation system operating stability and efficiency.
The utility model provides a technical scheme that above-mentioned problem adopted is: an improved high-efficiency radial turbine distributed residual pressure power generation system comprises a turbine and is characterized in that the turbine comprises a seal sleeve, nozzle ring blades, a volute, a main shaft, an impeller shaft sleeve, an impeller and a diffusion chamber; the impeller is sleeved on the outer side of the main shaft, the impeller shaft sleeve is positioned on the back side of the impeller, the impeller shaft sleeve and the impeller are of an integrated structure, the sealing sleeve is sleeved on the outer side of the impeller shaft sleeve, the volute is communicated with the impeller through the nozzle ring blades, and the impeller is communicated with the diffusion chamber.
Furthermore, the radius of the impeller shaft sleeve is smaller than that of the impeller, which is equivalent to reducing the area of the back side of the impeller bearing the axial force, greatly improving the operation stability of the system and reducing the vibration.
The working method comprises the following steps that steam enters a volute from an air inlet pipeline, enters an impeller through a nozzle ring blade channel, expands to apply work to rotate the impeller so as to output mechanical work and drive a main shaft to rotate, and exhaust steam is discharged through a diffusion chamber; the impeller shaft sleeve and the impeller are integrally designed, so that the impeller shaft sleeve can keep synchronous rotation when the impeller rotates at a high speed, and the operating efficiency of the system can be greatly improved.
Further, the turbine adopts a static pressure air bearing and adopts a single-stage impeller to do work. Consequently, the bearing speed is higher, and the unbalanced problem of axial force that the system exists just stands out more, so adopts the utility model discloses single-stage impeller adds the integrated design of axle sleeve, can reduce the atress area of axial force and guarantee axle sleeve and impeller synchronous operation to improve radial turbine distributing type excess pressure power generation system operating stability and efficiency.
Further, the turbine uses the pressure difference of the working media before and after expansion to do work, thereby generating electric energy.
Compared with the prior art, the utility model, have following advantage and effect: (1) the problem of axial force balance of a single-stage impeller with an air bearing can be effectively solved, and the axial bearing capacity of the system is improved; (2) the existing equipment is slightly modified; (3) when the impeller rotates at a high speed, the main shaft, the impeller shaft sleeve and the impeller can be ensured to rotate synchronously, and the operation stability of the system is improved; (4) the processing and manufacturing are simple, and the miniaturization of equipment is facilitated.
Drawings
Fig. 1 is a schematic cross-sectional view of a single-stage impeller radial turbine apparatus including a hydrostatic air bearing according to an embodiment of the present invention.
Fig. 2 is a schematic view of the impeller and the impeller shaft sleeve stress structure of the embodiment of the present invention.
In the figure: seal cover 1, nozzle cascade blade 2, spiral case 3, main shaft 4, impeller axle sleeve 5, impeller 6, diffusion chamber 7.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Referring to fig. 1, the improved high-efficiency radial turbine distributed residual pressure power generation system in the embodiment comprises a turbine, wherein the turbine comprises a seal sleeve 1, a nozzle ring blade 2, a volute 3, a main shaft 4, an impeller sleeve 5, an impeller 6 and a diffusion chamber 7.
The impeller 6 is sleeved on the outer side of the main shaft 4, the impeller shaft sleeve 5 is positioned on the back side of the impeller 6, the impeller shaft sleeve 5 and the impeller 6 are of an integrated structure, the sealing sleeve 1 is sleeved on the outer side of the impeller shaft sleeve 5, the volute 3 is communicated with the impeller 6 through the nozzle ring blades 2, and the impeller 6 is communicated with the diffusion chamber 7.
The radius of the impeller shaft sleeve 5 is smaller than that of the impeller 6, so that the axial bearing capacity area of the back side of the impeller 6 is reduced, the running stability of the system is improved, and vibration is reduced.
The working method is that the steam enters the volute 3 through the air inlet pipeline, enters the impeller 6 through the channel of the nozzle ring blade 2, expands to do work to rotate the impeller 6 so as to output mechanical work and drive the main shaft 4 to rotate, and then the exhaust steam is discharged through the diffusion chamber 7; the impeller shaft sleeve 5 and the impeller 6 are integrally designed, so that when the impeller 6 rotates at a high speed, the impeller shaft sleeve 5 also keeps synchronous rotation, and the operation efficiency of the system is improved.
The turbine uses a static pressure air bearing and a single-stage impeller 6 to do work. The turbine uses the pressure difference of the working medium before and after expansion to do work, thereby generating electric energy.
During the operation of the system, the pressure P0 from the static pressure air film in the static pressure air bearing is applied to the back of the impeller 6, as shown in fig. 2, if the impeller shaft sleeve 5 is not added, the axial pressure applied to the back of the impeller 6 is as follows:
after the impeller shaft sleeve 5 is added, the axial pressure born by the back surface of the impeller 6 is as follows:
wherein R1 is the radius of the impeller 6, and R2 is the radius of the impeller hub 5.
The utility model discloses an in the design, R2 is less than R1, that is to say that the area of impeller axle sleeve 5 is less than impeller 6's area, so can release:
in the embodiment, due to the adoption of the integrated design scheme of the impeller shaft sleeve 5 and the impeller 6, the back axial bearing capacity of the single-stage impeller 6 containing the static pressure air bearing is greatly reduced, the impeller 6 and the impeller shaft sleeve 5 can synchronously rotate at high speed, and the operation stability and efficiency of the radial turbine distributed residual pressure power generation system containing the air bearing are greatly improved.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications made by those skilled in the art without departing from the spirit and scope of the present invention should be construed as being included in the following claims.
Claims (2)
1. An improved high-efficiency radial turbine distributed residual pressure power generation system comprises a turbine and is characterized in that the turbine comprises a seal sleeve (1), nozzle ring blades (2), a volute (3), a main shaft (4), an impeller shaft sleeve (5), an impeller (6) and a diffusion chamber (7); the impeller (6) is sleeved on the outer side of the main shaft (4), the impeller shaft sleeve (5) is located on the back side of the impeller (6), the impeller shaft sleeve (5) and the impeller (6) are of an integrated structure, the sealing sleeve (1) is sleeved on the outer side of the impeller shaft sleeve (5), the volute (3) is communicated with the impeller (6) through the nozzle ring blades (2), and the impeller (6) is communicated with the pressure expansion chamber (7).
2. The improved high-efficiency radial turbine distributed residual pressure power generation system as claimed in claim 1, wherein the radius of the impeller shaft sleeve (5) is smaller than that of the impeller (6) for reducing the axial bearing force area at the back side of the impeller (6), improving the operation stability of the system and reducing vibration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920784114.8U CN210509298U (en) | 2019-05-28 | 2019-05-28 | Improved high-efficiency radial turbine distributed residual pressure power generation system |
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| CN201920784114.8U CN210509298U (en) | 2019-05-28 | 2019-05-28 | Improved high-efficiency radial turbine distributed residual pressure power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242354A (en) * | 2019-05-28 | 2019-09-17 | 华电电力科学研究院有限公司 | The improved efficient radial turbines distribution top pressure power generation system of one kind and its working method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242354A (en) * | 2019-05-28 | 2019-09-17 | 华电电力科学研究院有限公司 | The improved efficient radial turbines distribution top pressure power generation system of one kind and its working method |
| CN110242354B (en) * | 2019-05-28 | 2024-03-29 | 华电电力科学研究院有限公司 | Improved efficient radial turbine distributed residual pressure power generation system and working method thereof |
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