CN115653900A - Single-machine two-stage compressor - Google Patents

Abstract

The invention discloses a single-unit two-stage compressor, which comprises: stator and rotor are all installed in the casing, and casing one end is equipped with the tonifying qi mouth, and one-level screw compressor and second grade screw compressor are installed to the other end of casing, and the cover is equipped with the driving gear on the output shaft of rotor, and one-level screw compressor's power input end is fixed with driven gear, and the driving gear meshes with driven gear, and the output shaft of rotor is fixed with second grade screw compressor's power input end, and one-level screw compressor's the end of giving vent to anger and second grade screw compressor's inlet end all communicates with the casing is inside. The motor directly drives the second-stage screw compressor, the motor and the first-stage screw compressor are in gear transmission, the output shaft of the rotor is shortened, the integral rigidity of the rotor is improved, and the normal operation of the compressor is ensured; the gas after the first-stage compression is mixed with the gas entering the casing from the gas supplementing port, and the gas uniformly and quickly pass through the stator and the rotor, so that the stator and the rotor can quickly dissipate heat.

Description

Single-machine two-stage compressor

Technical Field

The invention relates to the field of compressors, in particular to a single-unit two-stage compressor.

Background

The two-stage compressor in the existing market is structurally arranged in a way that a motor is arranged in the middle, a first-stage compressor and a second-stage compressor are respectively arranged at two ends of the motor, air enters from an air inlet of the first-stage compressor, is pumped into the second-stage compressor after being compressed for the first time by the first-stage compressor for the second-stage compression, the structural arrangement of the two-stage compressor ensures that the main driving shaft of the motor is longer, the longer the main driving shaft is, the more easily the main driving shaft is deformed, and because the female rotor and the male rotor of the compressor are precisely meshed, when the main driving shaft directly connected with the male rotor is deformed, the compression performance of the compressor can be directly influenced, and the gas after primary compression cannot uniformly dissipate heat of the motor; in addition, the primary compressor and the secondary compressor are both directly driven by the main driving shaft, and the compressed air volume of the primary compressor and the compressed air volume of the secondary compressor in unit time are the same, so that air supplement is needed when secondary compression is carried out, and the more the air supplement volume is, the poorer the secondary compression effect is.

Therefore, it is an urgent need in the art to provide a single two-stage compressor to overcome the above problems.

Disclosure of Invention

In view of the above, the present invention provides a single two-stage compressor.

In order to achieve the purpose, the invention adopts the following technical scheme:

a single-unit two-stage compressor comprising: motor, one-level screw compressor and second grade screw compressor, the motor includes stator, rotor and casing, the stator with the rotor is all installed in the casing, casing one end is equipped with the tonifying qi mouth with outside atmosphere intercommunication, install the other end of casing one-level screw compressor with second grade screw compressor, the cover is equipped with the driving gear on the output shaft of rotor, one-level screw compressor's power input end is fixed with driven gear, the driving gear with driven gear meshes, the output shaft of rotor with second grade screw compressor's power input end is coaxial fixed, one-level screw compressor give vent to anger the end with second grade screw compressor's inlet end all with the inside intercommunication of casing.

According to the technical scheme, compared with the prior art, the single-machine two-stage compressor is disclosed and provided, the first-stage screw compressor and the second-stage screw compressor are installed on one side of the shell, the motor directly drives the second-stage screw compressor, the motor and the first-stage screw compressor are in gear transmission, the output shaft of the rotor is shortened while the first-stage screw compressor and the second-stage screw compressor can be reliably driven, so that the overall rigidity of the output shaft of the rotor is improved, and the compressor can normally operate; the air supplementing port is arranged, so that air can be supplemented into the casing in time, the air after primary compression is mixed with the air entering the casing from the air supplementing port, and the air rapidly pass through the stator and the rotor, so that the stator and the rotor can rapidly dissipate heat; the compressed air discharged from the primary screw compressor has certain heat, and the heat is superposed with the heat generated by the stator and the rotor to improve the air inlet heat of the secondary screw compressor, so that the overall compression effect of the compressor is improved.

Preferably, an air channel is integrally formed on the inner wall of the casing, the air outlet end of the first-stage screw compressor is communicated with the air channel, an air outlet communicated with the air channel is formed in the inner side wall of the casing, and the air outlet is close to the end, provided with the air supplementing port, of the casing. The gas outlet sets up in the homonymy of casing and the two all keeps away from end cover one with the tonifying qi mouth, and gas after the one-level compression and the gas mixture that enters into to the casing from the tonifying qi mouth, the stator and rotor are evenly just passed fast to the two for stator and rotor can dispel the heat fast.

Preferably, the number of teeth of the driving gear is greater than that of the driven gear. This setting makes one-level screw compressor's the compressed gas volume in the unit interval be greater than second grade screw compressor's compressed gas volume, and second grade screw compressor can obtain sufficient and high density compressed gas when admitting air to improve the compressive capacity of whole compressor.

Preferably, the device also comprises a first end cover, a machine body and a second end cover; the first-stage screw compressor comprises a first male rotor and a first female rotor, the second-stage screw compressor comprises a second male rotor and a second female rotor, and one end of the machine shell, which is far away from the air supplementing port, is opened; the first end cover is blocked at the opening end of the shell, one end of the machine body is fixed with one end, far away from the shell, of the first end cover, and the second end cover is fixed with one end, far away from the first end cover, of the machine body; the machine body is provided with a first rotor cavity and a second rotor cavity which penetrate through two end parts of the machine body, the first male rotor and the first female rotor are limited in the first rotor cavity, the first male rotor and the first female rotor are rotationally connected with the first end cover and the second end cover, the first male rotor is coaxially fixed with the driven gear, the second male rotor and the second female rotor are limited in the second rotor cavity, the second male rotor and the second female rotor are rotationally connected with the first end cover and the second end cover, and the second male rotor is coaxially fixed with an output shaft of the rotor; an exhaust channel and a through hole penetrating through the end wall of the first end cover are formed in the first end cover, one end of the exhaust channel is communicated with the exhaust side of the first rotor cavity, the other end of the exhaust channel is communicated with the gas channel, and the gas inlet side of the second rotor cavity is communicated with the interior of the shell through the through hole; and the second end cover is provided with an air inlet and an air outlet, the air inlet is communicated with the air inlet side of the first rotor cavity, and the air outlet is communicated with the air outlet side of the second rotor cavity. This arrangement ensures that the first-stage screw compressor and the second-stage screw compressor can be reliably mounted at the open end of the casing, and the first-stage screw compressor and the second-stage screw compressor can effectively compress gas.

Preferably, a plane defined by the axis of the first male rotor and the axis of the first female rotor together is perpendicular to a plane defined by the axis of the second male rotor and the axis of the second female rotor together. The volume of the compressor can be reduced by the arrangement, so that the compressor is compact in structure.

Preferably, integrated into one piece has the oil storage chamber on the fuselage and with the oil duct of oil storage chamber intercommunication, seted up on the fuselage and run through separately rotor chamber one with the oilhole two of rotor chamber two, rotor chamber one pass through oilhole one with the oil duct intercommunication, rotor chamber two passes through oilhole two with the oil duct intercommunication, the opening part shutoff in oil storage chamber has the lid, oil storage chamber internally mounted has the tube-shape filter core, the inside fluid stream in oil storage chamber flows into behind the tube-shape filter core to in the oil duct. The arrangement enables the first male rotor and the first female rotor as well as the second male rotor and the second female rotor to be effectively lubricated, and improves the sealing performance of the first male rotor and the first female rotor respectively matched with the first rotor cavity and the sealing performance of the second male rotor and the second female rotor respectively matched with the second rotor cavity.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is an overall isometric view of a single two-stage compressor;

FIG. 2 is an overall isometric view of a single two-stage compressor;

FIG. 3 is a side view of a single two-stage compressor;

FIG. 4 isbase:Sub>A sectional view taken along line A-A of FIG. 3;

FIG. 5 is an isometric view of a first end cap in a single two-stage compressor;

FIG. 6 is an isometric view of the frame of a single two-stage compressor;

FIG. 7 is an isometric view of the second end cap of a single two-stage compressor;

FIG. 8 is an isometric view of a shell in a single two-stage compressor;

FIG. 9 is a partial isometric view of a single two-stage compressor;

FIG. 10 is a partial isometric view of a single unit two stage compressor;

FIG. 11 is a partial isometric view three of a single two-stage compressor;

fig. 12 is a partial isometric view four of a single two-stage compressor.

In the figure:

the structure comprises a stator 1, a rotor 2, a machine shell 3, an air supplementing port 30, a gas channel 31, an air outlet 32, a male rotor I4, a female rotor I5, a male rotor II 6, a female rotor II 7, a driving gear 8, a driven gear 9, an end cover I10, an air exhaust channel 100, a through hole 101, a machine body 11, a rotor cavity I110, a rotor cavity II 111, an oil storage cavity 112, an oil hole I113, an oil hole II 114, an end cover II 12, an air inlet 120, an air outlet 121, an air channel 122, an installation cavity 123, a cover body 13 and a baffle 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention discloses a single-unit two-stage compressor, wherein a first-stage screw compressor and a second-stage screw compressor are arranged on one side of a shell 3, a motor directly drives the second-stage screw compressor, the motor and the first-stage screw compressor are in gear transmission, and an output shaft of a rotor 2 is shortened while the first-stage screw compressor and the second-stage screw compressor are ensured to be reliably driven, so that the integral rigidity of the output shaft of the rotor 2 is improved, and the normal operation of the compressor is ensured; the number of teeth of the moving gear is greater than that of the driven gear 9, and the compressed gas quantity of the primary screw compressor is greater than that of the secondary screw compressor in unit time, so that the secondary screw compressor can obtain sufficient and high-density compressed gas during gas inlet, and the compression capacity of the whole compressor is improved; the air supplement port 30 is arranged, so that air can be supplemented into the casing 3 in time; by arranging the gas channel 31 and the gas outlet 32, the gas outlet 32 and the gas supplementing port 30 are arranged on the same side of the casing 3, the gas outlet 32 and the gas supplementing port 30 are both far away from the first end cover 10, the gas after primary compression is mixed with the gas entering the casing 3 from the gas supplementing port 30, and the gas uniformly and quickly pass through the stator 1 and the rotor 2, so that the stator 1 and the rotor 2 can quickly dissipate heat; the compressed air discharged from the primary screw compressor has certain heat, and the heat is overlapped with the heat generated by the stator 1 and the rotor 2, so that the intake heat of the secondary screw compressor is improved, and the overall compression effect of the compressor is improved.

Examples

Referring to fig. 1 to 12, which are schematic structural views of a single two-stage compressor according to an embodiment of the present invention, in whole or in part, the present invention specifically discloses a single two-stage compressor, including: a motor, a first-stage screw compressor and a second-stage screw compressor,

the motor comprises a stator 1, a rotor 2 and a casing 3, the stator 1 is fixed with the inner side wall of the casing 3, the rotor 2 is coaxially arranged on the inner side of the stator 1, the axial lead of the rotor 2 is parallel to the length direction of the casing 3, one end of the casing 3 is provided with an air supplement port 30 communicated with the external atmosphere, a first-stage screw compressor and a second-stage screw compressor are installed at the other end of the casing 3, a driving gear 8 is coaxially sleeved on an output shaft of the rotor 2, a driven gear 9 is coaxially fixed at a power input end of the first-stage screw compressor, the driving gear 8 is meshed with the driven gear 9, the driving gear 8 and the driven gear 9 are both helical gears in the embodiment, an output shaft of the rotor 2 is coaxially fixed with a power input end of the second-stage screw compressor, an air outlet end of the first-stage screw compressor and an air inlet end of the second-stage screw compressor are both communicated with the inside of the casing 3, the external air is compressed by the first-stage screw compressor and then pumped into the casing 3 for second-stage compression, the air supplement port 30 can supplement the air inside the casing 3, and the air is forcibly pumped into the casing 3.

Further specifically, a gas channel 31 is integrally formed on the inner wall of the casing 3, the gas outlet end of the first-stage screw compressor is communicated with the gas channel 31, a gas outlet 32 communicated with the gas channel 31 is arranged on the inner side wall of the casing 3, and the gas outlet 32 is arranged near one end of the casing 3 provided with the gas supplementing port 30. Inside gas after one-level screw compressor compression entered into casing 3 from casing 3 near the one end of tonifying qi mouth 30, then was extracted by second grade screw compressor again, like this, compressed air can evenly and pass stator 1 and rotor 2 fast, and the heat that stator 1 and rotor 2 produced can be taken away fast to compressed air in the casing 3 to guarantee that the motor can not burn out because of high temperature. And because the compressed air discharged from the primary screw compressor has certain heat, the heat is superposed with the heat generated by the stator 1 and the rotor 2, so that the intake heat of the secondary screw compressor is improved, and the overall compression effect of the compressor is improved.

The primary screw compressor comprises a first male rotor 4 and a first female rotor 5 matched with the first male rotor, the secondary screw compressor comprises a second male rotor 6 and a second female rotor 7 matched with the second male rotor, the first male rotor 4 and the second male rotor 6 have the same size parameters, the first female rotor 5 and the second female rotor 7 have the same size parameters, the tooth number of the driving gear 8 is greater than that of the driven gear 9, the gear ratio of the driving gear 8 to the driven gear 9 is 2, the arrangement enables the rotating speed of the first male rotor 4 to be greater than that of the second male rotor 6, namely the compressed air volume of the primary screw compressor is greater than that of the secondary screw compressor in unit time, so that the secondary screw compressor can obtain sufficient and high-density compressed air when air enters, and the compression capacity of the whole compressor is improved;

further specifically, the air supply device further comprises a first end cover 10, a machine body 11 and a second end cover 12, wherein one end of the machine shell 3, which is far away from the air supply port 30, is opened;

the first end cover 10 is blocked at the opening end of the machine shell 3, one end of the machine body 11 is fixed with one end, far away from the machine shell 3, of the first end cover 10, the second end cover 12 is fixed with one end, far away from the first end cover 10, of the machine body 11, and a first rotor cavity 110 and a second rotor cavity 111 which penetrate through two end portions of the machine body 11 are formed in the machine body 11;

the first male rotor 4 and the first female rotor 5 are both limited in the first rotor cavity 110, the first male rotor 4 and the first female rotor 5 are matched and meshed, the axial lead of the first male rotor 4 is parallel to the axial lead of the rotor 2, the outer side walls of the first male rotor 4 and the first female rotor 5 are both in close contact with the inner side wall of the first rotor cavity 110, the first male rotor 4 and the first female rotor 5 are both in rotating connection with the first end cover 10 and the second end cover 12, and the first male rotor 4 and the driven gear 9 are coaxially fixed;

the second male rotor 6 and the second female rotor 7 are both limited in the second rotor cavity 111, the second male rotor 6 and the second female rotor 7 are matched and meshed, the axial lead of the second male rotor 6 is parallel to the axial lead of the rotor 2, the outer side walls of the second male rotor 6 and the second female rotor 7 are both in close contact with the inner side wall of the second rotor cavity 111, the second male rotor 6 and the second female rotor 7 are both in rotating connection with the first end cover 10 and the second end cover 12, and the second male rotor 6 and the output shaft of the rotor 2 are coaxially fixed;

the first end cover 10 is provided with an exhaust passage 100 and a through hole 101 which penetrate through the end wall of the first end cover, the gas passage 31 penetrates through the end wall of the opening end of the machine shell 3, one end of the exhaust passage 100 is communicated with the exhaust side of the first rotor cavity 110, when the first end cover 10 is blocked at the opening end of the machine shell 3, the other end of the exhaust passage 100 corresponds to and is communicated with the gas passage 31, and the air inlet side of the second rotor cavity 111 is communicated with the interior of the machine shell 3 through the through hole 101;

an air inlet 120 and an air outlet 121 are formed in the second end cover 12, the air inlet 120 is communicated with the air inlet side of the first rotor cavity 110, an air passage 122 and an installation cavity 123 are integrally formed in the second end cover 12, the air passage 122 is respectively communicated with the installation cavity 123 and the air outlet side of the second rotor cavity 111, the air outlet 121 is communicated with the installation cavity 123, a baffle 14 is hinged in the installation cavity 123, and under the condition that the compressor is stopped, the baffle 14 can seal the air passage 122 due to the gravity action of the baffle 14.

More specifically, a plane defined by the axis of the first male rotor 4 and the axis of the first female rotor 5 is perpendicular to a plane defined by the axis of the second male rotor 6 and the axis of the second female rotor 7.

More specifically, an oil storage cavity 112 and an oil passage communicated with the oil storage cavity 112 are integrally formed on the machine body 11, the machine body 11 is provided with a first oil hole 113 and a second oil hole 114 which respectively penetrate through the first rotor cavity 110 and the second rotor cavity 111, the first rotor cavity 110 is communicated with the oil passage through the first oil hole 113, the second rotor cavity 111 is communicated with the oil passage through the second oil hole 114, the opening of the oil storage cavity 112 is blocked with a cover body 13, a cylindrical filter element is installed inside the oil storage cavity 112, oil inside the oil storage cavity 112 flows into the oil passage after flowing through the cylindrical filter element, through the arrangement of the first oil hole 113 and the second oil hole 114, the first male rotor 4, the first female rotor 5, the second male rotor 6 and the second female rotor 7 can be effectively lubricated, and the sealing performance of the first male rotor 4 and the first female rotor 5 which are respectively matched with the first rotor cavity 110 and the sealing performance of the male rotor 6 and the female rotor 7 which are respectively matched with the second rotor cavity 111 are improved.

Further specifically, an oil passage first and an oil passage second are integrally formed on the end cover second 12, a plurality of connecting holes are formed in the end wall of the end cover second 12 close to the machine body 11 and the end wall of the machine body 11 close to the end cover second 12, so that when the end cover second 12 is fixed with the machine body 11, oil passages are respectively communicated with the oil passage first and the oil passage second, the oil passages are communicated with the rotating joints of the male rotor first 4, the female rotor first 5 and the end cover second 12 in a penetrating manner, and the oil passages are communicated with the rotating joints of the male rotor second 6, the female rotor second 7 and the end cover second 12 in a penetrating manner, so that oil in the oil storage cavity 112 can lubricate the two rotating joints.

This compressor carries out the during operation, the motor drives one-level screw compressor and second grade screw compressor work simultaneously, and, owing to be provided with driving gear 8 and driven gear 9, the number of teeth of driving gear 8 is greater than driven gear 9's number of teeth, therefore, one-level screw compressor's the volume of calming the anger that the unit time internal pressure is greater than second grade screw compressor, one-level screw compressor extracts outside gas and discharges to in casing 3 after compressing, tonifying qi mouth 30 has been seted up on the casing 3, gas after the one-level compression and the gas mixture that gets into to casing 3 from tonifying qi mouth 30 department enter into second grade screw compressor and carry out the secondary compression, discharge from gas vent 121 department afterwards, in-process, gas after the one-level compression and the gas that gets into to casing 3 from tonifying qi mouth 30 department can take away the heat that the motor produced when moving, reach the effect of cooling.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A single-unit, two-stage compressor, comprising: motor, one-level screw compressor and second grade screw compressor, the motor includes stator (1), rotor (2) and casing (3), stator (1) with rotor (2) are all installed in casing (3), casing (3) one end is equipped with tonifying qi mouth (30) with outside atmosphere intercommunication, install the other end of casing (3) one-level screw compressor with second grade screw compressor, the cover is equipped with driving gear (8) on the output shaft of rotor (2), one-level screw compressor's power input end is fixed with driven gear (9), driving gear (8) with driven gear (9) meshing, the output shaft of rotor (2) with second grade screw compressor's power input end is coaxial fixed, one-level screw compressor's the end of giving vent to anger with second grade screw compressor's inlet end all with casing (3) inside intercommunication.

2. The single-machine two-stage compressor according to claim 1, wherein a gas channel (31) is integrally formed on an inner wall of the casing (3), a gas outlet end of the single-stage screw compressor is communicated with the gas channel (31), a gas outlet (32) communicated with the gas channel (31) is arranged on an inner side wall of the casing (3), and the gas outlet (32) is arranged near an end of the casing (3) provided with the gas supplementing port (30).

3. The single-unit two-stage compressor according to claim 1, wherein the number of teeth of said driving gear (8) is greater than that of said driven gear (9).

4. The single-unit two-stage compressor according to claim 2, further comprising a first end cover (10), a body (11) and a second end cover (12); the primary screw compressor comprises a first male rotor (4) and a first female rotor (5), the secondary screw compressor comprises a second male rotor (6) and a second female rotor (7), and one end of the casing (3) far away from the air supplementing port (30) is opened; the first end cover (10) is plugged at the open end of the shell (3), one end of the machine body (11) is fixed with one end, far away from the shell (3), of the first end cover (10), and the second end cover (12) is fixed with one end, far away from the first end cover (10), of the machine body (11); the machine body (11) is provided with a first rotor cavity (110) and a second rotor cavity (111) which penetrate through two end portions of the machine body, the first male rotor (4) and the first female rotor (5) are limited in the first rotor cavity (110), the first male rotor (4) and the first female rotor (5) are rotationally connected with the first end cover (10) and the second end cover (12), the first male rotor (4) is coaxially fixed with the driven gear (9), the second male rotor (6) and the second female rotor (7) are limited in the second rotor cavity (111), the second male rotor (6) and the second female rotor (7) are rotationally connected with the first end cover (10) and the second end cover (12), and the second male rotor (6) is coaxially fixed with an output shaft of the rotor (2); an exhaust channel (100) and a through hole (101) penetrating through the end wall of the end cover I (10) are formed in the end cover I, one end of the exhaust channel (100) is communicated with the exhaust side of the rotor cavity I (110), the other end of the exhaust channel (100) is communicated with the gas channel (31), and the gas inlet side of the rotor cavity II (111) is communicated with the inside of the machine shell (3) through the through hole (101); an air inlet (120) and an air outlet (121) are formed in the second end cover (12), the air inlet (120) is communicated with the air inlet side of the first rotor cavity (110), and the air outlet (121) is communicated with the air outlet side of the second rotor cavity (111).

5. The single-unit two-stage compressor according to claim 4, wherein a plane defined by the axial line of said first male rotor (4) and the axial line of said first female rotor (5) is perpendicular to a plane defined by the axial line of said second male rotor (6) and the axial line of said second female rotor (7).

6. The single-unit double-stage compressor is characterized in that an oil storage cavity (112) and an oil channel communicated with the oil storage cavity (112) are integrally formed in the machine body (11), the machine body (11) is provided with a first oil hole (113) and a second oil hole (114) which respectively penetrate through the first rotor cavity (110) and the second rotor cavity (111), the first rotor cavity (110) is communicated with the oil channel through the first oil hole (113), the second rotor cavity (111) is communicated with the oil channel through the second oil hole (114), a cover body (13) is sealed at an opening of the oil storage cavity (112), a cylindrical filter element is installed inside the oil storage cavity (112), and the oil in the oil storage cavity (112) flows through the cylindrical filter element and then flows into the oil channel.

Images