CN215058258U - Gas compressor with oblique thrust structure and rotor system - Google Patents
Gas compressor with oblique thrust structure and rotor system Download PDFInfo
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- CN215058258U CN215058258U CN202022667085.2U CN202022667085U CN215058258U CN 215058258 U CN215058258 U CN 215058258U CN 202022667085 U CN202022667085 U CN 202022667085U CN 215058258 U CN215058258 U CN 215058258U
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Abstract
The utility model discloses a compressor of slant thrust structure, including the pivot, impeller and motor are established to the cover in the pivot, and the stator is established to the impeller dustcoat, and wherein, just evenly set up round or many rings of gas pockets to the part of impeller on the stator, this department can decompose into axial and radial air current after admitting air, and radial air current will make the impeller suspend in the stator and stabilize the rotation, and the axial air current pushes away the impeller backward, and the stator has played radial bearing and thrust bearing's effect as air bearing simultaneously. The utility model also discloses a rotor system. The utility model discloses a compressor of slant thrust structure to the stator is air bearing concurrently, can reduce or even replace original journal bearing and thrust bearing. On the basis of guaranteeing to operate stably, the number of the radial bearing and the thrust bearing can be reduced, so that the length of the rotating shaft can be shortened, the weight is reduced, the occupied space is reduced, the integrated design is facilitated, and the processing and assembling difficulty is reduced. When the same number of radial bearings are arranged, the operation is more stable.
Description
Technical Field
The utility model relates to a stator is air compressor and rotor system of air bearing's slant thrust structure concurrently belongs to compressor technical field.
Background
The industrial gas turbine mainly comprises three parts of a compressor, a combustion chamber and a turbine. The compressor is a component which utilizes blades rotating at high speed to do work on gas (mostly air) so as to improve the gas pressure, the air is compressed into high-temperature and high-pressure air, then the high-temperature and high-pressure air is supplied to a combustion chamber for fuel combustion, and the generated high-temperature and high-pressure gas expands in a turbine to do work.
The existing gas compressor generally adopts a bearing group consisting of a plurality of radial bearings and thrust bearings, and usually needs a rotating shaft with enough length for installation, so that the problem is that the axial size of the gas compressor is increased, if the gas compressor is used in equipment such as a micro gas turbine generator set, the occupied space of the equipment is increased, the whole weight is increased, and the integrated design is not facilitated; and the processing and assembling errors caused by the arrangement of a plurality of bearings are increased, and the processing and assembling difficulty is high.
In addition, most of the impellers adopted by the existing compressor are semi-open impellers, and the improvement on how to obtain smaller friction loss and flow resistance, higher efficiency, lightness, high strength and the like is still left.
Disclosure of Invention
To the above-mentioned prior art, the utility model provides a compressor of slant thrust structure to the stator is air bearing concurrently, can reduce or even replace original journal bearing and thrust bearing. The utility model also provides a rotor system.
The utility model discloses a realize through following technical scheme:
the utility model provides a compressor of slant thrust structure, includes the pivot, and impeller and motor are established to the cover in the pivot, and the stator is established to the impeller dustcoat, and wherein, evenly set up round or many circles of gas pockets on the part just to the impeller blade on the stator, and this department can decompose into axial and radial air current after admitting air, and radial air current will make the impeller suspend and rotate in the stator is stable, and axial air current pushes away the impeller backward, and the stator has played radial bearing and thrust bearing's effect simultaneously as air bearing.
Furthermore, one side or/and two sides of the motor are/is provided with a radial bearing sleeved on the rotating shaft, or the radial bearing is not arranged. When being equipped with two radial bearing, be equivalent to totally three radial bearing supports, whole vibration is little, and the operation is stable. When the radial bearing is not arranged or only one of the radial bearings is contained, the length of the rotating shaft is shortened, the coaxiality of parts on the shaft is easily guaranteed, the processing is easier, the integration level is high, and the reliability of the whole machine is high.
Further, the radial bearing is an air bearing.
Further, the rotating shaft may or may not be provided with a thrust bearing, and it is determined according to the calculation result of the axial force, and if the axial force is too large and is difficult to offset, the thrust bearing needs to be provided.
Further, the structure of the impeller is as follows: the blade-free telescopic sleeve comprises a rear cover, blades, a sleeve body and a front cover, wherein the rear cover is arranged at the tail end of the sleeve body, and a through hole which is integrated with the center of the sleeve body is arranged in the rear cover for being sleeved and fixed on a rotating shaft; the blades are arranged around the sleeve body and rotate towards the same direction, one end of each blade is connected with the outer wall of the sleeve body, and the other end of each blade is connected with the end face of the rear cover; the front cover is covered on the blade and is in a circular truncated cone shape; the air inlet surface of the front cover is a curved surface which is in smooth transition along the profile of the ridge line of the blade, the air outlet surface is provided with grooves which are matched with the end parts of the blade, and the end parts of the blade corresponding to the grooves are embedded into the grooves and are in tight fit connection; a flow passage is formed among the blade, the rear cover and the front cover; the air outlet is separated by the blades between the tail part of the front cover and the rear cover, and the air flows out of the air outlet from the front part of the blades through the flow channel.
Furthermore, the rear cover, the blades and the sleeve body are integrally formed.
Further, the outer edge of the blade protrudes out of the end face of the rear cover in the axial direction.
Further, the blade includes longer main leaf and shorter splitter blade, and main leaf and splitter blade set up at interval in proper order. The front cover groove is divided into a main blade groove and a splitter blade groove which are respectively arranged corresponding to the end parts of the main blade and the splitter blade.
Furthermore, the front edge of the front cover protrudes out of the front edge of the blade, or is flat with the front edge of the blade, or is shorter than the front edge of the blade.
Further, the front cover is made of carbon fiber composite material. The preparation method comprises the following steps:
step A, putting carbon fibers with a set volume into an oil bed, and infiltrating the carbon fibers by using a liquid adhesive in the oil bed;
b, extracting the fully soaked carbon fibers, and extruding to remove redundant adhesive in the carbon fibers;
c, winding the carbon fiber after the excess adhesive is extruded to form spongy carbon fiber which is fully soaked with the adhesive and has a three-dimensional structure;
d, carrying out vacuum-pumping treatment on the spongy carbon fiber which is fully soaked with the adhesive and has the three-dimensional structure, so that gas in the three-dimensional structure of the carbon fiber is pumped out;
step E, injecting a liquid steel-based material into the carbon fiber three-dimensional structure through a micro-injector, and performing micro-vibration on the carbon fiber three-dimensional structure in the injection process to obtain a composite material of the steel-based material and the carbon fiber which is stained with the adhesive;
and F, putting the steel-based material and the composite material which is full of the adhesive carbon fibers into a mould, pressurizing, cooling and forming to obtain the formed steel-based carbon fiber composite front cover connected through chemical bonds.
A rotor system comprises the compressor with the structure.
The utility model discloses a compressor is equipped with slant thrust structure, and the stator has played journal bearing and thrust bearing's effect simultaneously as air bearing (let in gas in the clearance between stator and the impeller from the gas pocket, make and form even stable air film in the clearance, make the impeller steady rotation in the stator to play air bearing's effect), can reduce or even replace original journal bearing and thrust bearing. When the stator is simultaneously used as a thrust bearing, if other radial bearings are arranged on the rotating shaft, a plurality of radial bearings are equivalently supported, the whole vibration is small, and the operation is stable. If no other radial bearing or only a small amount of radial bearings are arranged on the rotating shaft, the length of the rotating shaft can be shortened, the coaxiality of parts on the shaft is easily ensured, the processing is easier, the integration level is high, and the reliability of the whole machine is high.
The utility model discloses a compressor of slant thrust structure to the stator is air bearing concurrently, can reduce or even replace original journal bearing and thrust bearing. On the basis of guaranteeing to operate stably, the number of the radial bearing and the thrust bearing can be reduced, so that the length of the rotating shaft can be shortened, the weight is reduced, the occupied space is reduced, the integrated design is facilitated, and the processing and assembling difficulty is reduced. When the same number of radial bearings are arranged, the operation is more stable.
The utility model discloses a compressor, used impeller can be for being equipped with the closed impeller of protecgulum, and the protecgulum is the round platform ring-type, and the inlet surface is along the smooth curved surface that passes through of blade crest line profile, and the back of the body gas face is equipped with the recess identical with the blade tip, and the during operation friction loss is little, and flow resistance is little, and is efficient; during operation, the front cover is tightly occluded with the blades, gas flows out from the air outlet through the flow channel from the front parts of the blades, and gas leakage is little. The protecgulum is made by carbon-fibre composite, and the whole quality of impeller is light and have high strength, and blade (metal material) can expand during the rotation, and the protecgulum does not expand, consequently along with the increase of pivoted speed up, time, interlock between the recess of blade and protecgulum can be more and more tight, and the recess separation of blade and protecgulum is further prevented in the gas pocket also can be applyed on the protecgulum, is fit for high-speed rotatory operating mode. The splitter blade is arranged, so that the blockage of inlet airflow can be reduced, the sliding coefficient of the outlet of the impeller can be improved, the efficiency of the impeller is improved, and the overall efficiency of the gas compressor can be improved due to the improvement of the flow field of the outlet of the impeller. The front cover is made of a carbon fiber composite material, and the formed composite material far breaks through the modulus upper limit of each conventional steel base material by adding the steel base, the carbon fiber and the adhesive, so that the rigidity is greatly increased, meanwhile, the tensile strength and the breaking force of the steel are enhanced, the shearing strength is also greatly improved, and each performance of the composite material is far higher than that of the common steel; meanwhile, the production cost, the process threshold, the batch flow, the universality and the like are all controlled in a metal material system, so that the industry with high-performance material requirements generally benefits.
The various terms and phrases used herein have the ordinary meaning as is well known to those skilled in the art. To the extent that the terms and phrases are not inconsistent with a known meaning, the meaning of the present invention is expressed, the specification is set forth.
Drawings
FIG. 1: the utility model discloses a stator is air bearing's slant thrust structure sketch map concurrently.
FIG. 2: the two sides of the motor are provided with a schematic structural diagram of a radial bearing sleeved on the rotating shaft.
FIG. 3: one side of the motor is provided with a structural schematic diagram of a radial bearing sleeved on the rotating shaft.
FIG. 4: the two sides of the motor are not provided with radial bearings.
FIG. 5: the impeller is in a schematic structure.
FIG. 6: the structure of the rear cover, the blades and the sleeve body is schematically shown.
FIG. 7: fig. 6 is a front view.
FIG. 8: fig. 6 is a side view.
FIG. 9: fig. 8 is a sectional view taken at a-a.
FIG. 10: a manufacturing flow chart of the front cover.
The motor comprises a rotating shaft 1, an impeller 2, a rear cover 201, a blade 202, a sleeve 203, a front cover 204, a flow channel 205, an air outlet 206, a stator 3, an air hole 301 and a motor 4.
Detailed Description
The present invention will be further described with reference to the following examples. However, the scope of the present invention is not limited to the following examples. Those skilled in the art will appreciate that various changes and modifications may be made to the invention without departing from the spirit and scope of the invention.
Example 1
A compressor comprises a rotating shaft 1, an impeller 2 and a motor 4 are sleeved on the rotating shaft 1, a stator 3 is arranged outside the impeller 2, as shown in figure 1, one circle or a plurality of circles of air holes 301 are uniformly formed in the part, right facing a front cover 204, of the stator 3, the air holes can be decomposed into axial air flow and radial air flow after air enters the air holes, the impeller is suspended in the stator 3 to stably rotate through the radial air flow, the impeller is pushed backwards through the axial air flow, and the stator 3 serves as an air bearing and plays a role of a radial bearing and a thrust bearing at the same time.
The two sides of the motor are provided with radial bearings (figure 2) sleeved on the rotating shaft, or one side of the motor is provided with a radial bearing (figure 3) sleeved on the rotating shaft, or the radial bearing (figure 4) is not arranged. When being equipped with two radial bearing, be equivalent to totally three radial bearing supports, whole vibration is little, and the operation is stable. When the radial bearing is not arranged or only one of the radial bearings is included, the length of the rotating shaft is shortened (in the figures 2-4, the shaft length is sequentially shortened), the coaxiality of parts on the shaft is easily guaranteed, the processing is easier, the integration level is high, and the reliability of the whole machine is high.
The radial bearing is an air bearing.
The rotating shaft can be provided with or without a thrust bearing, and is determined according to the calculation result of the axial force, and if the axial force is too large and is difficult to offset, the thrust bearing needs to be arranged.
The specific structure of the impeller 2 is as follows: the blade-free rotary shaft comprises a rear cover 201, blades 202, a sleeve body 203 and a front cover 204, as shown in fig. 5-9, wherein the rear cover 201 is arranged at the tail end of the sleeve body 203, and the rear cover 201 and the sleeve body 203 are provided with an integrated through hole at the center for being sleeved and fixed on the rotary shaft 1; the blades 202 are arranged around the sleeve body 203 and rotate towards the same direction, one end of each blade 202 is connected with the outer wall of the sleeve body 203, and the other end of each blade 202 is connected with the end face of the rear cover 201; the front cover 204 is covered on the blade 202, and the front cover 204 is in a circular truncated cone shape; the air inlet surface of the front cover 204 is a curved surface which is in smooth transition along the ridge line profile of the blade 202, the air outlet surface is provided with grooves which are matched with the end parts of the blade 202, and the end parts of the blade 202 corresponding to the grooves are embedded into the grooves and are in tight fit connection; a flow passage 205 is formed among the blade 202, the rear cover 201 and the front cover 204; an air outlet 206 is formed between the rear part of the front cover 204 and the rear cover 201 and is partitioned by the blades 202, and air flows out of the air outlet 206 from the front part of the blades 202 through a flow passage 205.
The rear cover 201, the blade 202 and the sleeve 203 are integrally formed, as shown in fig. 6 to 9.
The outer edge of the vane 202 protrudes from the end face of the rear cover 201 in the axial direction.
The blades 202 include a longer main blade and a shorter splitter blade, and the main blade and the splitter blade are sequentially arranged at intervals. The groove of the front cover 204 is divided into a main blade groove and a splitter blade groove, which are respectively arranged corresponding to the ends of the main blade and the splitter blade.
The front edge of the front cover 204 protrudes from the front edge of the blade 202, or is parallel to the front edge of the blade 202, or is shorter than the front edge of the blade 202.
The front cover 204 is made of a carbon fiber composite material, and the specific preparation method comprises the following steps (the flow chart is shown in fig. 10):
step A, putting carbon fibers with a set volume into an oil bed, and infiltrating the carbon fibers by using a liquid adhesive in the oil bed;
b, extracting the fully soaked carbon fibers, and extruding to remove redundant adhesive in the carbon fibers;
c, winding the carbon fiber after the excess adhesive is extruded to form spongy carbon fiber which is fully soaked with the adhesive and has a three-dimensional structure;
d, carrying out vacuum-pumping treatment on the spongy carbon fiber which is fully soaked with the adhesive and has the three-dimensional structure, so that gas in the three-dimensional structure of the carbon fiber is pumped out;
step E, injecting a liquid steel-based material into the carbon fiber three-dimensional structure through a micro-injector, and performing micro-vibration on the carbon fiber three-dimensional structure in the injection process to obtain a composite material of the steel-based material and the carbon fiber which is stained with the adhesive;
and F, putting the steel-based material and the composite material which is full of the adhesive carbon fibers into a mould, pressurizing, cooling and forming to obtain the formed steel-based carbon fiber composite front cover connected through chemical bonds.
A rotor system and a gas compressor applying the structure are provided.
The compressor is provided with the oblique thrust structure, the stator serves as an air bearing and simultaneously plays the roles of a radial bearing and a thrust bearing (gas is introduced into a gap between the stator and the impeller from the air hole, so that a uniform and stable air film is formed in the gap, the impeller rotates stably in the stator, and the effect of the air bearing is achieved), and the original radial bearing and the original thrust bearing can be reduced or even replaced. When the stator is simultaneously used as a thrust bearing, if other radial bearings are arranged on the rotating shaft, a plurality of radial bearings are equivalently supported, the whole vibration is small, and the operation is stable. If no other radial bearing or only a small number of radial bearings are arranged on the rotating shaft, the length of the rotating shaft is shortened, the coaxiality of parts on the shaft is easily ensured, the processing is easier, the integration level is high, and the reliability of the whole machine is high.
The impeller of the compressor is provided with the detachable front cover, the front cover is in a circular truncated cone shape, the air inlet surface is a curved surface which is in smooth transition along the ridge line profile of the blade, the air outlet surface is provided with a groove which is matched with the end part of the blade, and the impeller has the advantages of small friction loss, small flow resistance and high efficiency in work; during operation, the front cover is tightly occluded with the blades, gas flows out from the air outlet through the flow channel from the front parts of the blades, and gas leakage is little. The protecgulum is made by carbon-fibre composite, and the whole quality of impeller is light and have high strength, and blade (metal material) can expand during the rotation, and the protecgulum does not expand, consequently along with the increase of pivoted speed up, time, interlock between the recess of blade and protecgulum can be tighter and tighter, and the recess separation of blade and protecgulum can be prevented better on the protecgulum to admitting air of gas pocket, is fit for high-speed rotatory operating mode. The splitter blade is arranged, so that the blockage of inlet airflow can be reduced, the sliding coefficient of the outlet of the impeller can be improved, the efficiency of the impeller is improved, and the overall efficiency of the gas compressor can be improved due to the improvement of the flow field of the outlet of the impeller.
The front cover is made of a carbon fiber composite material, and the formed composite material far breaks through the modulus upper limit of each conventional steel base material by adding the steel base, the carbon fiber and the adhesive, so that the rigidity is greatly increased, meanwhile, the tensile strength and the breaking force of the steel are enhanced, the shearing strength is also greatly improved, and each performance of the composite material is far higher than that of the common steel; meanwhile, the production cost, the process threshold, the batch flow, the universality and the like are all controlled in a metal material system, so that the industry with high-performance material requirements generally benefits.
Example 2
A compressor comprises a rotating shaft 1, wherein an impeller 2 and a motor 4 are sleeved on the rotating shaft 1, a stator 3 is arranged outside the impeller 2, one circle or a plurality of circles of air holes 301 are uniformly formed in the part, right facing blades of the impeller 2, of the stator 3, the part can be decomposed into axial air flow and radial air flow after air enters the part, the impeller is suspended in the stator 3 to stably rotate through the radial air flow, the impeller is pushed backwards through the axial air flow, and the stator 3 serves as an air bearing and plays a role of a radial bearing and a thrust bearing at the same time.
A rotor system and a gas compressor applying the structure are provided.
The above examples are provided to those of ordinary skill in the art to fully disclose and describe how to make and use the claimed embodiments, and are not intended to limit the scope of the disclosure herein. Modifications apparent to those skilled in the art are intended to be within the scope of the appended claims.
Claims (9)
1. The utility model provides a compressor, includes the pivot, and impeller and motor are established to the cover in the pivot, and the stator is established to the impeller dustcoat, its characterized in that: one or more circles of air holes are uniformly formed in the part, opposite to the impeller blades, of the stator;
the specific structure of the impeller is as follows: the blade-free telescopic sleeve comprises a rear cover, blades, a sleeve body and a front cover, wherein the rear cover is arranged at the tail end of the sleeve body, and a through hole which is integrated with the center of the sleeve body is arranged in the rear cover for being sleeved and fixed on a rotating shaft; the blades are arranged around the sleeve body and rotate towards the same direction, one end of each blade is connected with the outer wall of the sleeve body, and the other end of each blade is connected with the end face of the rear cover; the front cover is covered on the blade and is in a circular truncated cone shape; the air inlet surface of the front cover is a curved surface which is in smooth transition along the profile of the ridge line of the blade, the air outlet surface is provided with grooves which are matched with the end parts of the blade, and the end parts of the blade corresponding to the grooves are embedded into the grooves and are in tight fit connection; a flow passage is formed among the blade, the rear cover and the front cover; the air outlet is separated by the blades between the tail part of the front cover and the rear cover, and the air flows out of the air outlet from the front part of the blades through the flow channel.
2. An air compressor according to claim 1, characterized in that: and one side or/and two sides of the motor are/is/are provided with radial bearings sleeved on the rotating shaft or are not provided with the radial bearings.
3. An air compressor according to claim 2, characterized in that: the radial bearing is an air bearing.
4. An air compressor according to claim 1, characterized in that: the rotating shaft may or may not be provided with a thrust bearing.
5. An air compressor according to claim 1, characterized in that: the rear cover, the blades and the sleeve body are integrally formed; or/and: the outer edge of the vane protrudes out of the end face of the rear cover in the axial direction.
6. An air compressor according to claim 1, characterized in that: the blades comprise longer main blades and shorter splitter blades, and the main blades and the splitter blades are sequentially arranged at intervals; the front cover groove is divided into a main blade groove and a splitter blade groove which are respectively arranged corresponding to the end parts of the main blade and the splitter blade.
7. An air compressor according to claim 1, characterized in that: the front edge of the front cover protrudes out of the front edge of the blade, or is parallel to the front edge of the blade, or is shorter than the front edge of the blade.
8. An air compressor according to claim 1, characterized in that: the front cover is made of carbon fiber composite material.
9. A rotor system, characterized by: comprising a compressor as claimed in claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022667085.2U CN215058258U (en) | 2020-11-18 | 2020-11-18 | Gas compressor with oblique thrust structure and rotor system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022667085.2U CN215058258U (en) | 2020-11-18 | 2020-11-18 | Gas compressor with oblique thrust structure and rotor system |
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| Publication Number | Publication Date |
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| CN215058258U true CN215058258U (en) | 2021-12-07 |
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| CN202022667085.2U Active CN215058258U (en) | 2020-11-18 | 2020-11-18 | Gas compressor with oblique thrust structure and rotor system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503002A (en) * | 2020-11-18 | 2021-03-16 | 靳普 | Gas compressor with oblique thrust structure and rotor system |
| CN112503004A (en) * | 2020-11-18 | 2021-03-16 | 靳普 | Back-to-back type compressor |
-
2020
- 2020-11-18 CN CN202022667085.2U patent/CN215058258U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503002A (en) * | 2020-11-18 | 2021-03-16 | 靳普 | Gas compressor with oblique thrust structure and rotor system |
| CN112503004A (en) * | 2020-11-18 | 2021-03-16 | 靳普 | Back-to-back type compressor |
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Effective date of registration: 20230403 Address after: 518063 10 Nanshan District Road, Gaoxin south, Nanshan District, Shenzhen, Guangdong. Patentee after: Liu Muhua Address before: 100176 room 1202a, block B, Chaolin Plaza, No.19, Ronghua Middle Road, economic and Technological Development Zone, Daxing District, Beijing Patentee before: Jin Pu |