CN214617031U

CN214617031U - Multistage large-traffic compressor

Info

Publication number: CN214617031U
Application number: CN202120786408.1U
Authority: CN
Inventors: 梁树金
Original assignee: FUXIN JINHAO AIR COMPRESSOR CO LTD
Current assignee: FUXIN JINHAO AIR COMPRESSOR CO LTD
Priority date: 2021-04-17
Filing date: 2021-04-17
Publication date: 2021-11-05
Anticipated expiration: 2031-04-17

Abstract

The utility model relates to a multi-stage large-flow compressor, wherein N independent sealed cavities are arranged in a shell, an exhaust port of each cavity is connected with an air inlet of the next stage, and the exhaust of each stage enters the next stage after being cooled; at least one star wheel shaft and at least one screw rod are arranged in each chamber, and the axis of the star wheel shaft is vertical to the axis of the screw rod; star wheels are arranged on the star wheel shafts; a main shaft is arranged on the shell, the main shaft drives the screw rods of all the chambers and the star wheel to independently and synchronously rotate according to a fixed speed ratio through a transmission device, and the star wheel is in clearance fit with the spiral grooves of the screw rods; and liquid injection holes are respectively formed in the shell of each chamber, and liquid injected from the liquid injection holes seals and cools the matching part of the star wheel and the screw rod, so that the processes of air suction, compression and exhaust of the corresponding chambers are realized. The compressor adopts a combined structure of the star wheel and the screw rod and adopts a multi-stage compression mode, so that the volume of the compressor is reduced, the volume flow is larger, and the compression efficiency is improved.

Description

Multistage large-traffic compressor

Technical Field

The invention relates to a multistage high-flow compressor, belonging to the technical field of volume rotary compressors.

Background

The compressor is a driven fluid machinery that promotes low-pressure gas to high-pressure gas, by the wide application in each field of industry, along with the continuous development of compressor trade, the customer also more and more high to the efficiency requirement of compressor, and current compressor is one-level transmission usually, and gas discharges after once compressing, and the efficiency of compressor hardly reaches ideal height.

The prior publication 211080052, entitled "a multi-stage transmission structure for compressor", discloses a compressor with a multi-stage transmission structure, which solves the technical problem of reducing the volume of the compressor. However, the compressor is provided with three rotors, the rotors on two sides are in meshed transmission with the middle rotor, and the meshed process has abrasion, the service life is influenced, and the compression ratio of the air compressor is influenced.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a multistage high-flow compressor, which adopts a combined structure of a star wheel and a screw rod and performs multistage compression, thereby not only reducing the volume of the compressor and increasing the volume flow, but also improving the compression efficiency.

In order to solve the problems, the invention creates the following specific technical scheme: a multistage high-flow compressor is provided with N independent sealed chambers in a shell, an exhaust port of each stage of chamber is connected with an air inlet of the next stage, and exhaust of each stage enters the next stage after being cooled; at least one star wheel shaft and at least one screw rod are arranged in each chamber, and the axis of the star wheel shaft is vertical to the axis of the screw rod; star wheels are arranged on the star wheel shafts; a main shaft is arranged on the shell, the main shaft drives the screw rods of all the chambers and the star wheel to independently and synchronously rotate according to a fixed speed ratio through a transmission device, and the star wheel is in clearance fit with the spiral grooves of the screw rods; and liquid injection holes are respectively formed in the shell of each chamber, and liquid injected from the liquid injection holes seals and cools the matching part of the star wheel and the screw rod, so that the processes of air suction, compression and exhaust of the corresponding chambers are realized.

The compressor is in two-stage compression, two cavities are arranged in the shell, a star wheel shaft penetrates through the two cavities, and the star wheel shaft is coaxially connected with two star wheels and is respectively positioned in the two different cavities; each chamber is provided with a screw rod which is vertical to the star wheel shaft.

The transmission device is structurally characterized in that a main shaft gear is coaxially arranged on a main shaft, the circumference of the main shaft gear is simultaneously meshed with two screw rod end gears I, and each screw rod end gear I is coaxially connected with one end of a screw rod of a corresponding chamber to complete the rotation of the screw rod; the other end of the screw of one chamber is coaxially provided with a screw end gear II, a transition shaft parallel to the screw is arranged in the chamber, one end of the transition shaft is provided with a transition gear II, the transition gear II is meshed with the screw end gear II through a transition gear I, the other end of the transition shaft is provided with a bevel gear, the end part of a star wheel shaft is provided with a star wheel end gear, and the star wheel end gear is meshed with the bevel gear.

The compressor is in two-stage compression, two cavities are arranged in the shell, a star wheel shaft penetrates through the two cavities, and the star wheel shaft is coaxially connected with two star wheels and is respectively positioned in the two different cavities; two screw rods vertical to the star wheel shaft are arranged in each chamber, and the star wheel in each chamber is in clearance fit with the spiral grooves of the two screw rods simultaneously.

The transmission device is structurally characterized in that a first screw and a second screw are arranged in the first cavity, and a third screw and a fourth screw are arranged in the second cavity; a main shaft gear is coaxially arranged on a main shaft, the circumference of the main shaft gear is simultaneously meshed with two reversing gears I, a reversing gear II is coaxially arranged on the reversing gear I, and a screw end gear I is respectively arranged on a first screw and a third screw and is meshed with the reversing gear II; screw end gears III are respectively arranged at the end parts of the second screw and the fourth screw, and the screw end gears III are meshed with the main shaft gear; the screw end gear II is arranged on the second screw rod of the first cavity, the transition shaft parallel to the second screw rod is arranged in the cavity, the transition gear II is arranged at one end of the transition shaft and is meshed with the screw end gear II through the transition gear I, the bevel gear is arranged at the other end of the transition shaft, the star wheel end gear is arranged at the end part of the star wheel shaft and is meshed with the bevel gear.

The star wheel is provided with 3-n blades, each blade is independently provided with a truncated cone-shaped tooth sheet, and the truncated cone-shaped tooth sheets are in clearance fit with the spiral grooves of the screw rod.

The upper plane of the circular truncated cone-shaped tooth sheet is circular, and the upper plane and the central axis of the screw rod are positioned in the same plane.

The cavity be equipped with air inlet and gas vent at the casing surface respectively, the gas vent of each grade cavity is connected with the air inlet of next stage, realizes the series connection of gas circuit.

The screw rod is a cylindrical spiral groove rotor or a circular truncated cone arc spiral groove rotor, and the number of the spiral grooves is 2-n.

The utility model provides a multistage large-traffic compressor, the during operation is passed through the shaft coupling by motor or steam turbine and is connected with the main shaft, rethread transmission and diversion let screw rod and star gear independent operation respectively, screw rod and star gear intermeshing and keep certain clearance, independent operation separately, contactless, do not have the friction, the volume of due screw rod is very little in a plurality of cavities, easy processing, and the air is big after carrying out multistage compression in sealed cavity, thereby the manufacturing of large-traffic compressor has been realized.

The specific connection structure of the two-stage compressor is characterized in that two star wheels are coaxially connected with a star wheel shaft structure, so that the star wheel shaft is convenient to process and occupies a smaller space. And the transmission device is specifically disclosed, and independent rotation of the star wheel and the screw rod is realized through the structures of the gear, the transition shaft and the bevel gear, and the star wheel and the screw rod are not in contact and have no friction.

And further, two screws are arranged in each cavity and matched with the star wheel, so that the compression efficiency is improved.

And each blade of the star wheel is independently provided with a circular truncated cone-shaped tooth sheet, and the circular truncated cone-shaped tooth sheet is repaired and replaced with the star wheel, so that the maintenance cost is reduced.

The air outlet and the air inlet of the cavity are connected through an external pipeline, so that the shell is convenient to process and maintain.

The excircle of the screw rod can be in a cylindrical or round table structure so as to ensure the strength of the screw rod, and the number of the spiral grooves can be determined according to the actual matching with the star wheel.

Drawings

FIG. 1 shows the internal structure of a two-stage compression double-star wheel and double-screw assembly of a high-capacity compressor according to an embodiment.

FIG. 2 is a two-stage compression profile of a high capacity compressor according to an embodiment.

Fig. 3 is an internal structure of a two-stage compression double-star-wheel four-screw combination of a two-mass flow compressor according to the second embodiment.

FIG. 4 is a front view of the internal structure of the two-stage compression dual-star-wheel four-screw combination of the second high-capacity compressor according to the second embodiment.

FIG. 5 is a two-stage compression profile of a two-stage high capacity compressor according to an embodiment.

FIG. 6 is a schematic diagram of a cylindrical spiral-grooved rotor.

FIG. 7 is a schematic structural view of a circular truncated cone arc-shaped spiral groove rotor.

Fig. 8 is a cross-sectional view of the star wheel plate centrally engaged with the screw groove.

Detailed Description

Example one

As shown in fig. 1 and 2, a two-stage large-flow compressor with a double-screw combination of double star wheels is provided with two independent sealed chambers in a shell (2), wherein the first chamber is provided with a first air inlet 1-1 and a first exhaust port 1-2, the second chamber is provided with a second air inlet 2-1 and a second exhaust port 2-2, the exhaust port 1-2 of the first chamber and the air inlet 2-1 of the second chamber are connected by an external pipeline, so that the serial connection of the whole pipelines is realized, and the exhaust of each stage enters the next stage after being cooled; a star wheel 3 and a screw rod 5 are respectively arranged in each chamber, the star wheels 3 of the two chambers are coaxially connected with a star wheel shaft 6, the axis of the star wheel shaft 6 is vertical to the axis of the screw rod 5, the screw rods 5 of the first chamber and the second chamber are in circular truncated cone arc spiral groove rotor structures, the appearance figures of the screw rods are shown in figure 7, the number of the spiral grooves is 2-n, and similarly, the cylindrical spiral groove rotor structure shown in figure 6 can also be adopted; a main shaft 1 is arranged on a shell 2, the main shaft 1 drives a screw 5 and a star wheel 3 of each chamber to independently and synchronously rotate according to a fixed speed ratio through a transmission device, 3-n blades are arranged on the star wheel 3, a circular truncated cone-shaped tooth sheet 4 is independently arranged on each blade, the circular truncated cone-shaped tooth sheets 4 are in clearance fit with spiral grooves of the screw 5, the upper plane of each circular truncated cone-shaped tooth sheet 4 is circular, and the upper plane and the central axis of the screw 5 are positioned in the same plane, as shown in fig. 8; and the shell 2 of each chamber is respectively provided with a liquid injection hole 7, and liquid injected from the liquid injection holes 7 seals and cools the matching part of the star wheel 3 and the screw 5, so that the processes of air suction, compression and exhaust of the corresponding chambers are realized.

The structure of the transmission device of the first embodiment is that a main shaft gear 11 is coaxially arranged on a main shaft 1, the circumference of the main shaft gear 11 is simultaneously meshed with two screw rod end gears I12, and each screw rod end gear I12 is coaxially connected with one end of a screw rod 5 of a corresponding chamber to complete the rotation of the screw rod 5; the other end of the screw 5 of one chamber is coaxially provided with a screw end gear II 13, a transition shaft 15 parallel to the screw 5 is arranged in the chamber, one end of the transition shaft 15 is provided with a transition gear II 16, the transition gear II 16 is meshed with the screw end gear II 13 through a transition gear I14, the other end of the transition shaft 15 is provided with a bevel gear 17, the end part of the star wheel shaft 6 is provided with a star wheel end gear 18, and the star wheel end gear 18 is meshed with the bevel gear 17.

Example two

As shown in fig. 3 to 5, a two-stage high-flow compressor with a double star wheel and four screws combination is configured in such a manner that one screw is added in each chamber based on a structure of an embodiment, and two screws in each chamber are matched with star wheels at corresponding positions together, so that the compression capacity of the compressor is improved.

The structure of the transmission device in the second embodiment is that a first screw 5-1 and a second screw 5-2 are arranged in a first cavity, and a third screw 5-3 and a fourth screw 5-4 are arranged in a second cavity; a main shaft gear 11 is coaxially arranged on a main shaft 1, the circumference of the main shaft gear 11 is simultaneously meshed with two reversing gears I19, a reversing gear II 20 is coaxially arranged on the reversing gear I19, and screw end gears I12 are respectively arranged on a first screw 5-1 and a third screw 5-3 in two chambers and are meshed with the reversing gear II 20; screw end gears III 21 are respectively arranged at the end parts of the second screw 5-2 and the fourth screw 5-4 in the two cavities, and the screw end gears III 21 are meshed with the main shaft gear 11; a screw end gear II 13 is arranged on the second screw 5-2 of the first chamber, a transition shaft 15 parallel to the screw 5 is arranged in the chamber, a transition gear II 16 is arranged at one end of the transition shaft 15, the transition gear II 16 is meshed with the screw end gear II 13 through a transition gear I14, a bevel gear 17 is arranged at the other end of the transition shaft 15, a star wheel end gear 18 is arranged at the end part of the star wheel shaft 6, and the star wheel end gear 18 is meshed with the bevel gear 17.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and similarly, when the compressor is a three-stage or even multi-stage compressor, in the present invention, the motor or the steam turbine is connected to the main shaft 1 through the coupling, and the screw rod and the star wheel are operated independently through the transmission and the direction change of the gear, and the screw rod and the star wheel are engaged with each other and maintain a certain gap, and each operates independently without contact and friction. The transmission structure of the present invention can be infinitely substituted by equivalent structures for those skilled in the art, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

In summary, the multistage high-flow compressor of the present invention has the following effects:

1. the volume efficiency is high, the efficiency is up to more than 90%, the energy-saving effect is very obvious, a large amount of electric energy is saved, the efficiency is stable, and the obvious fluctuation is avoided along with the air intake and gas utilization conditions;

2. the service life is long, the truncated cone-shaped tooth sheet and the spiral groove are not contacted and sprayed with liquid through high-precision gear transmission, and the whole compressor runs stably, has small vibration and is long in service life;

3. the single-stage pressure ratio is high, the single-stage pressure ratio can reach 1.6MPA, and the centrifugal compressor under the same pressure can be completed only by 3 stages of compression or more;

4. the rotating speed is low, the highest rotating speed of the screw is 3000r/min, and the rotating speed of an impeller of the centrifugal compressor is up to tens of thousands of revolutions;

5. the volume is small, and the whole compressor has a simple structure, very small volume and small occupied space due to the unique host structure;

6. the volume flow range is wide, and the compressor is of a volume rotary structure, so that the stepless regulation of 0-100% of flow can be realized, and the flow of the centrifugal compressor can be regulated only within the range of 70-100%.

Claims

1. A multistage high-flow compressor is characterized in that: n independent sealed cavities are arranged in the shell (2), an exhaust port of each cavity is connected with an air inlet of the next stage, and exhaust of each stage enters the next stage after being cooled; at least one star wheel shaft (6) and at least one screw rod (5) are arranged in each chamber, and the axis of the star wheel shaft (6) is vertical to the axis of the screw rod (5); a star wheel (3) is arranged on the star wheel shaft (6); a main shaft (1) is arranged on the shell (2), the main shaft (1) drives the screw rods (5) and the star wheels (3) of all chambers to independently and synchronously rotate according to a fixed speed ratio through a transmission device, and the star wheels (3) are in clearance fit with the spiral grooves of the screw rods (5); and a liquid injection hole (7) is respectively formed in the shell (2) of each chamber, and liquid injected from the liquid injection hole (7) seals and cools the matching part of the star wheel (3) and the screw (5), so that the processes of air suction, compression and exhaust of the corresponding chambers are realized.

2. The multi-stage, high-flow compressor of claim 1, wherein: the compressor adopts two-stage compression, two chambers are arranged in the shell (2), a star wheel shaft (6) penetrates through the two chambers, and the star wheel shaft (6) is coaxially connected with two star wheels (3) and is respectively positioned in two different chambers; each chamber is internally provided with a screw (5) which is vertical to the star wheel shaft (6).

3. The multi-stage, high-flow compressor of claim 2, wherein: the transmission device is structurally characterized in that a main shaft gear (11) is coaxially arranged on a main shaft (1), the circumference of the main shaft gear (11) is simultaneously meshed with two screw rod end gears I (12), and each screw rod end gear I (12) is coaxially connected with one end of a screw rod (5) of a corresponding chamber to complete the rotation of the screw rod (5); the other end of the screw (5) in one chamber is coaxially provided with a screw end gear II (13), a transition shaft (15) parallel to the screw (5) is arranged in the chamber, one end of the transition shaft (15) is provided with a transition gear II (16), the transition gear II (16) is meshed with the screw end gear II (13) through a transition gear I (14), the other end of the transition shaft (15) is provided with a bevel gear (17), the end part of the star wheel shaft (6) is provided with a star wheel end gear (18), and the star wheel end gear (18) is meshed with the bevel gear (17).

4. The multi-stage, high-flow compressor of claim 1, wherein: the compressor adopts two-stage compression, two chambers are arranged in the shell (2), a star wheel shaft (6) penetrates through the two chambers, and the star wheel shaft (6) is coaxially connected with two star wheels (3) and is respectively positioned in two different chambers; two screw rods (5) vertical to a star wheel shaft (6) are arranged in each chamber, and the star wheel (3) in each chamber is in clearance fit with the spiral grooves of the two screw rods simultaneously.

5. The multi-stage, high-flow compressor of claim 4, wherein: the transmission device is structurally characterized in that a first screw (5-1) and a second screw (5-2) are arranged in the first cavity, and a third screw (5-3) and a fourth screw (5-4) are arranged in the second cavity; a main shaft gear (11) is coaxially arranged on a main shaft (1), the circumference of the main shaft gear (11) is simultaneously meshed with two reversing gears I (19), a reversing gear II (20) is coaxially arranged on the reversing gear I (19), and a screw rod end gear I (12) is respectively arranged on a first screw rod (5-1) and a third screw rod (5-3) and is meshed with the reversing gear II (20); the end parts of the second screw (5-2) and the fourth screw (5-4) are respectively provided with a screw end gear III (21), and the screw end gear III (21) is meshed with the main shaft gear (11); a screw end gear II (13) is arranged on a second screw (5-2) of the first chamber, a transition shaft (15) parallel to the second screw (5-2) is arranged in the chamber, a transition gear II (16) is arranged at one end of the transition shaft (15), the transition gear II (16) is meshed with the screw end gear II (13) through a transition gear I (14), a bevel gear (17) is arranged at the other end of the transition shaft (15), a star wheel end gear (18) is arranged at the end part of the star wheel shaft (6), and the star wheel end gear (18) is meshed with the bevel gear (17).

6. The multi-stage high-flow compressor according to any one of claims 1 to 5, characterized in that: the star wheel (3) is provided with 3-n blades, each blade is independently provided with a truncated cone-shaped tooth sheet (4), and the truncated cone-shaped tooth sheets (4) are in clearance fit with the spiral grooves of the screw rod (5).

7. The multi-stage, high-flow compressor of claim 6, wherein: the upper plane of the circular truncated cone-shaped tooth sheet (4) is circular, and the upper plane and the central axis of the screw rod (5) are positioned in the same plane.

8. The multi-stage, high-flow compressor of claim 1, wherein: the cavity be equipped with air inlet and gas vent at the casing surface respectively, the gas vent of each grade cavity is connected with the air inlet of next stage, realizes the series connection of gas circuit.

9. The multi-stage, high-flow compressor of claim 1, wherein: the screw rod (5) is a cylindrical spiral groove rotor or a circular truncated cone arc-shaped spiral groove rotor, and the number of the spiral grooves is 2-n.