CN212672073U - Large-traffic four-shaft gear assembled compressor - Google Patents
Large-traffic four-shaft gear assembled compressor Download PDFInfo
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- CN212672073U CN212672073U CN202020196819.0U CN202020196819U CN212672073U CN 212672073 U CN212672073 U CN 212672073U CN 202020196819 U CN202020196819 U CN 202020196819U CN 212672073 U CN212672073 U CN 212672073U
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Abstract
The utility model relates to a chemical machinery makes technical field, especially relates to a large-traffic four shaft gear assembled compressor. This large-traffic air compression's four shaft gear assembled compressor structure includes: (1) a rotor: the device comprises a first-level high-speed shaft rotor, an idle shaft I, an idle shaft II and a second-level and third-level high-speed shaft rotor; (2) a stator: comprises a gear box assembly part, a first, a second and a third stage circulation assembly parts. The rotor is assembled in the gear box, the steam turbine is directly connected with an idle shaft I, the idle shaft I is simultaneously connected with a first-level high-speed shaft rotor and an idle shaft II, and the idle shaft II drives a second-level high-speed shaft rotor and a third-level high-speed shaft rotor. The air flow is pressurized in the flow group of each stage, each stage being sealed from the outside, so that the air flow reaches the desired pressure at the outlet. The utility model discloses an air compression's four shaft gear assembled compressor uses the air as main medium, has low in manufacturing cost, compact structure, life cycle length, maintains simple, energy-efficient, can realize large-traffic air compression's advantage.
Description
Technical Field
The utility model belongs to the technical field of chemical compressor makes, especially, relate to a large-traffic four-shaft gear assembled compressor.
Background
The traditional chemical compressor comprises: centrifugal compressors, reciprocating compressors and screw compressors. A centrifugal compressor is a vane rotary compressor. The compressor is the compressor type which is most widely applied in the current market.
Most of the prior single-shaft centrifugal compressors used in the chemical industry are gradually replaced by gear assembly type compressors due to the limitations that the shafting is long, the single-shaft centrifugal compressors cannot be cooled step by step, the efficiency is low in small flow, the manufacturing cost of the single-shaft centrifugal compressors is high, the occupied area is relatively large, the continuous operation time is short, and the maintenance is difficult. Most of gear-assembled air compressors used in the prior art are 3-shaft compressors, two high-speed shafts are connected by a low-speed gearwheel, but when the power of the shafts is increased and the through-flow part of an impeller is increased, the low-speed gearwheel is too large, and further material and process difficulties are brought, so that the domestic gear-assembled air compressors are basically low-flow air compressors. And this is novel to adopt four-axis structure, and two low-speed gear wheels slow down step by step, and centre-to-centre spacing transfer scope is big, can realize the overall arrangement of big air compressor machine. The utility model provides a what big flow rate four shaft gear assembled compressor.
The four-shaft gear assembled compressor for compressing large flow air has the technical difficulties that: 1. the air seal isolation efficiency of the circulation group part and the outside is realized under the high pressure state; 2. reasonable layout of each rotor; 3. and (3) carrying out numerical analysis on a four-axis rotor dynamic coupling mechanism in a gear meshing state.
Disclosure of Invention
Technical problem to be solved
In order to solve the above problem of the prior art, the utility model provides an use the air as main medium, the atmoseal realizes the sealed isolation to circulation group portion, low in manufacturing cost, compact structure, operation cycle length, maintenance are simple, energy-efficient, can realize large-traffic air compression's four-shaft gear assembled compressor.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme structure include: (1) a rotor: the device comprises a first-level high-speed shaft rotor, an idle shaft I, an idle shaft II and a second-level and third-level high-speed shaft rotor; (2) a stator: comprises a gear box assembly part, a first, a second and a third stage circulation assembly parts. The rotor is assembled in the gear box, the steam turbine is directly connected with an idle shaft I, the idle shaft I is simultaneously connected with a first-level high-speed shaft rotor and an idle shaft II, and the idle shaft II drives a second-level high-speed shaft rotor and a third-level high-speed shaft rotor. The air flow is pressurized in the flow group of each stage, each stage being sealed from the outside, so that the air flow reaches the desired pressure at the outlet.
A large-flow four-shaft gear assembled compressor comprises a rotor and a stator, wherein the rotor comprises a first-stage high-speed shaft rotor, an idle shaft I, an idle shaft II and a second-stage high-speed shaft rotor; the stator comprises a gear box group part, a first stage circulation group part, a second stage circulation group part and a third stage circulation group part; the method is characterized in that: the rotor is assembled in the gear box, the steam turbine is directly connected with an idle shaft I, the idle shaft I is simultaneously connected with a first-stage high-speed shaft rotor and an idle shaft II, and the idle shaft II drives a second-stage high-speed shaft rotor and a third-stage high-speed shaft rotor; the airflow is pressurized in each stage of the circulation group part, and each stage of the circulation group part is isolated from the outside through sealing.
The primary high-speed shaft rotor includes: a primary gear shaft, a primary impeller and a primary fairing;
the idle shaft I comprises: the device comprises an idle shaft gear shaft, an idle shaft thrust ring and a coupler;
the idle shaft II comprises: a wheel shaft, a large gear ring;
the second-third-stage high-speed shaft rotor comprises: the two-stage gear shaft, the two-stage impeller, the two-stage fairing, the three-stage impeller, the three-stage fairing and the thrust ring;
the first-second-third flow group part comprises a volute, a diffuser and an air seal respectively;
in the technical scheme, the idle shaft I is dragged by a low-medium speed turbine, the rotating speed of the idle shaft I is 3000-10000RPM, and the gas medium of the compressor is air.
Two low-speed shaft rotors are arranged between the first-stage high-speed shaft rotor and the second-stage high-speed shaft rotor, and the first-stage high-speed shaft rotor and the second-stage high-speed shaft rotor are separated.
And an oil seal is arranged inside the gear box and outside for isolation.
Compared with the prior art, the invention has the beneficial effects that:
the utility model has the advantages that: the four-axis layout, the medium is the air, compact structure, and it is simple to maintain, and is energy-efficient, can realize large-traffic air compression.
To sum up, the utility model discloses a large-traffic air compression's four-axis gear assembled compressor has low in manufacturing cost, compact structure, life cycle length, maintains simple, energy-efficient, can realize large-traffic air compression's advantage.
Drawings
The invention is further described with reference to the accompanying drawings in which:
fig. 1 is a layout view of a split plane of a four-shaft gear assembled compressor for compressing large flow air in a first embodiment of the present invention.
In the figure:
1: a first-stage high-speed shaft rotor; 1-1: a first-stage impeller; 1-2: primary fairing, 1-3: a primary gear shaft; 2: an idle shaft I, 2-1: an idler shaft gear shaft; 2-2: idle shaft thrust collar, 2-3: a coupling; 3: an idle shaft II, 3-1: axle, 3-2: a bull gear; 4: a second-third-stage high-speed shaft rotor; 4-1: a secondary impeller; 4-2; a secondary cowling; 4-3: a tertiary impeller; 4-4: three-stage fairing, 4-5: a second and third gear shaft; 5: a first-stage non-input-side bearing; 6: a primary input side bearing; 7: the non-input side bearing of the idle shaft I; 8: an input side bearing of an idle shaft I; 9: a bearing on the non-input side of the idle shaft II; 10: the input side of the idle shaft II is provided with a bearing; 11: a second three-stage non-input side bearing; 12: a second and third input side bearing; 13: primary air sealing; 14: secondary air sealing; 15: three-stage air sealing; 16: a first-stage non-input side oil seal; 17: an input side oil seal of the idle shaft I; 18: a secondary side oil seal; 19: a third-stage side oil seal; 20: a primary flow group unit; 20-1: a first-stage volute; 20-2: a first stage diffuser; 21: a secondary flow group part; 21-1: a second-stage volute; 21-2: a secondary diffuser; 22: a third stage flow group part; 22-1: a three-stage volute; 22-2: a three-stage diffuser; 23: a box assembly part; 23-1: a first-stage side plate; 23-2: a secondary side plate; 23-3: and a third-stage side plate.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
Example one
Referring to fig. 1, the present embodiment provides a large-flow four-shaft gear assembled compressor, which mainly includes: 1: a first-stage high-speed shaft rotor; 1-1: a first-stage impeller; 1-2: primary fairing, 1-3: a primary gear shaft; 2: an idle shaft I, 2-1: an idler shaft gear shaft; 2-2: idle shaft thrust collar, 2-3: a coupling; 3: an idle shaft II, 3-1: axle, 3-2: a bull gear; 4: a second-third-stage high-speed shaft rotor; 4-1: a secondary impeller; 4-2; a secondary cowling; 4-3: a tertiary impeller; 4-4: three-stage fairing, 4-5: a second and third gear shaft; 5: a first-stage non-input-side bearing; 6: a primary input side bearing; 7: the non-input side bearing of the idle shaft I; 8: an input side bearing of an idle shaft I; 9: a bearing on the non-input side of the idle shaft II; 10: the input side of the idle shaft II is provided with a bearing; 11: a second three-stage non-input side bearing; 12: a second and third input side bearing; 13: primary air sealing; 14: secondary air sealing; 15: three-stage air sealing; 16: a first-stage non-input side oil seal; 17: an input side oil seal of the idle shaft I; 18: a secondary side oil seal; 19: a third-stage side oil seal; 20: a primary flow group unit; 20-1: a first-stage volute; 20-2: a first stage diffuser; 21: a secondary flow group part; 21-1: a second-stage volute; 21-2: a secondary diffuser; 22: a third stage flow group part; 22-1: a three-stage volute; 22-2: a three-stage diffuser; 23: a box assembly part; 23-1: a first-stage side plate; 23-2: a secondary side plate; 23-3: and a third-stage side plate. In addition, the device also comprises a motor, an auxiliary interstage pipeline and the like.
Specifically, the primary high-speed shaft rotor 1 comprises a primary impeller 1-1, a primary fairing 1-2 and a primary gear shaft 1-3;
the idle shaft I2 comprises an idle shaft gear shaft 2-1, an idle shaft thrust ring 2-2 and a coupler 2-3;
the idler shaft II 3 comprises a wheel shaft 3-1 and a large gear 3-2;
the second-third-stage high-speed shaft rotor 4 comprises a second-stage impeller 4-1, a second-stage fairing 4-2, a third-stage impeller 4-3, a third-stage fairing 4-4 and a second-third-stage gear shaft 4-5;
the first-stage circulation group part 20 comprises a first-stage volute 20-1, a first-stage diffuser 20-2 and a first-stage air seal 13;
the second-stage circulation group part 21 comprises a second-stage volute 21-1, a second-stage diffuser 21-2 and a second-stage air seal 14;
the three-stage circulation group part 22 comprises a three-stage volute 22-1, a three-stage diffuser 22-2 and a three-stage air seal 15;
the gear box 23 comprises a first-stage side plate 23-1, a second-stage side plate 23-2 and a third-stage side plate 23-3.
Specifically, a primary high-speed shaft rotor 1 is supported by a primary non-input side bearing 5 and a primary input side bearing 6, an idler shaft i 2 is supported by an idler shaft i non-input side bearing 7 and an idler shaft i input side bearing 8, an idler shaft ii 3 is supported by an idler shaft ii non-input side bearing 9 and an idler shaft ii input side bearing 10, and a secondary tertiary high-speed shaft rotor 4 is supported by a secondary tertiary non-input side bearing 11 and a secondary tertiary input side bearing 12, each of which is fitted in a gear box 23. The power source steam turbine is directly connected with an idle shaft I2 through a coupler 2-3, the idle shaft I2 simultaneously drives a first-stage high-speed shaft rotor 1 and an idle shaft II 3, and the idle shaft II 3 drives a second-stage high-speed shaft rotor 4.
Specifically, the first-stage flow group part 20 is fixed to a first-stage side plate 23-1 of the gear case 23 by screws, the second-stage flow group part 21 is fixed to a second-stage side plate 23-2 of the gear case 23 by screws, and the third-stage flow group part 22 is fixed to a third-stage side plate 23-3 of the gear case 23 by screws.
Specifically, the air flow enters from the inlet of the first-stage flow group part 20, is accelerated and pressurized by the first-stage impeller 1-1 rotating at a high speed, then enters the second-stage flow group part 21 after being accelerated and pressurized by the first-stage diffuser 20-2 and then being decelerated and pressurized in the first-stage volute 20-1, enters the second-stage pipeline from the outlet of the first-stage volute 20-1 after being cooled, is accelerated and pressurized by the second-stage impeller 4-1 rotating at a high speed, then enters the third-stage flow group part 22 after being decelerated and pressurized in the second-stage volute 21-1, enters the second-stage pipeline from the outlet of the second-stage volute 21-1 after being cooled, is accelerated and pressurized by the third-stage impeller 4-3 rotating at a high speed, and then enters the third-stage diffuser 22-2 after being pressurized, after the air flow is subjected to deceleration and pressurization action in the three-stage volute 22-1, the air flow coming out of the outlet of the three-stage volute 22-1 is gas with required pressure.
Specifically, since the rotor shaft system and the stator component are in a non-contact relationship, in order to prevent high-pressure airflow from leaking outwards, a primary air seal 13 is added between the primary flow group part 20 and the primary high-speed shaft rotor 1, a secondary air seal 14 is added between the secondary flow group part 21 and the secondary and tertiary high-speed shaft rotor 4, and a tertiary air seal 15 is added between the tertiary flow group part 22 and the secondary and tertiary high-speed shaft rotor 4, so that the high efficiency of the whole air path system is ensured.
The high-speed shafts of the two cantilever-end suspension impellers are separated by two low-speed shaft rotors, compared with the traditional low-speed gear, the center distance of the high-speed shafts is large, the large-diameter impeller and the related through-flow part are conveniently arranged, and the maximum air quantity of the air compressor can reach 40 ten thousand Nm 3/h.
The gear meshing position of each rotor shaft is provided with oil injection cooling and lubrication, each shaft is supported by a sliding bearing with oil lubrication, the rotor part and the stator part are in non-contact, and a complete lubricating oil system is arranged in the whole gear box.
The inside and the outside of the gear box body are isolated by oil seals, and the circulation groups at all levels are isolated from the outside by air seals.
Therefore, the four-shaft gear assembly type compressor for compressing the large flow of air has the advantages of low manufacturing cost, compact structure, long operation period, simplicity in maintenance, high efficiency, energy conservation and capability of realizing the compression of the large flow of air.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (3)
1. A large-flow four-shaft gear assembled compressor comprises a rotor and a stator, wherein the rotor comprises a first-stage high-speed shaft rotor, an idle shaft I, an idle shaft II and a second-stage high-speed shaft rotor; the stator comprises a gear box group part, a first stage circulation group part, a second stage circulation group part and a third stage circulation group part; the method is characterized in that:
the rotor is assembled in the gear box, the steam turbine is directly connected with an idle shaft I, the idle shaft I is simultaneously connected with a first-stage high-speed shaft rotor and an idle shaft II, and the idle shaft II drives a second-stage high-speed shaft rotor and a third-stage high-speed shaft rotor; the airflow is pressurized in each stage of circulation group part, and each stage of circulation group part is isolated from the outside through sealing;
the idle shaft I is dragged by a low-medium speed turbine, the rotating speed of the idle shaft I is 3000-10000RPM, and the gas medium of the compressor is air.
2. The mass flow four-axis gear assembled compressor according to claim 1, wherein:
two low-speed shaft rotors are arranged between the first-stage high-speed shaft rotor and the second-stage high-speed shaft rotor, and the first-stage high-speed shaft rotor and the second-stage high-speed shaft rotor are separated.
3. The mass flow four-axis gear assembled compressor according to claim 1, wherein:
and an oil seal is arranged inside the gear box and outside for isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020196819.0U CN212672073U (en) | 2020-02-21 | 2020-02-21 | Large-traffic four-shaft gear assembled compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020196819.0U CN212672073U (en) | 2020-02-21 | 2020-02-21 | Large-traffic four-shaft gear assembled compressor |
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| Publication Number | Publication Date |
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| CN212672073U true CN212672073U (en) | 2021-03-09 |
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| CN202020196819.0U Active CN212672073U (en) | 2020-02-21 | 2020-02-21 | Large-traffic four-shaft gear assembled compressor |
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| CN (1) | CN212672073U (en) |
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