CN217712944U

CN217712944U - Double-screw air compressor

Info

Publication number: CN217712944U
Application number: CN202221395554.2U
Authority: CN
Inventors: 林帅宇
Original assignee: Ningbo Sutong Auto Parts Manufacturing Co ltd
Current assignee: Ningbo Sutong Auto Parts Manufacturing Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-11-01
Anticipated expiration: 2032-06-01

Abstract

The utility model discloses a double screw air compressor, including the casing that has inspiratory end and exhaust end, rotate the setting in the casing positive rotor, rotate set up in the casing with the positive rotor is parallel form and the two can contactless engaged with cloudy rotor and actuating mechanism, the one end of positive rotor is provided with can be by actuating mechanism driven second gear, and the other end sets up the third gear be provided with on the cloudy rotor can with the driven fourth gear of third gear engagement. Compared with the prior art, the utility model has the advantages of: the second gear and the third gear are arranged at the two ends of the male rotor respectively, and the fourth gear is arranged at one end, close to the third gear, of the female rotor.

Description

Double-screw air compressor

Technical Field

The utility model relates to a compressor especially relates to a double screw air compressor machine.

Background

In the existing market, the twin-screw compressor is divided into an oil-injection screw compressor and an oil-free screw compressor. The oil injection type screw compressor sprays oil liquid into a rotor cavity in the working process, and the oil in compressed air cannot be completely separated in the coarse separation process and the fine separation process, so that the oil in the compressed air discharged after the compression of the screw compressor is slightly remained. Therefore, when the required compressed gas does not allow to contain lubricating oil, namely clean compressed gas is required, an oil-free screw compressor is required, the oil-free screw compressor is the most common one in the oil-free screw compressor, and the oil-free screw compressor generally comprises a compressor body, a male rotor, a female rotor, an air inlet end cover arranged at one end of the compressor body, a bearing seat arranged at the other end of the compressor body, a synchronous gear cavity end cover and a driving device; the rotor is provided with a small synchronous gear, the female rotor is provided with a large synchronous gear, and the large synchronous gear and the small synchronous gear are in meshing transmission in a synchronous gear cavity. The double-screw compressor adopts single-side transmission, namely, transmission gears of the male rotor and the female rotor are positioned on the same side.

For example, chinese utility model patent with application number ZL201720607483.0 (publication number CN 206903877U) discloses "a twin-screw air compressor", which comprises a motor, a shaft coupling, a gear a, a bearing, a male rotor, a housing, a female rotor and a gear B, wherein the motor is connected with the male rotor through the shaft coupling, the male rotor and the female rotor are fixed in the housing through the bearing, the gear is installed at one end of the male rotor, the gear B is installed at one end of the female rotor, the gear a and the gear B are engaged, communicated cavity holes are formed in the side wall of the housing, air inlets and air outlets are respectively formed in the two ends of the housing, and the air compressor is only provided with a synchronous gear which is engaged with the twin screws at the same end of the male rotor and the female rotor, so that only one side is stressed, dynamic balance is insufficient, operation is unstable, failure rate is high, and service life of the male rotor and the female rotor is further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a double screw air compressor machine that enables male rotor and female rotor both sides all atress when the meshing transmission is provided to above-mentioned technical current situation.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the double-screw air compressor comprises

A housing having a suction end and a discharge end;

the male rotor is rotationally arranged in the shell;

the female rotor is rotatably arranged in the shell, is parallel to the male rotor and is in meshed transmission with the male rotor; and

a drive mechanism for driving the male rotor;

it is characterized in that the preparation method is characterized in that,

the driving mechanism comprises a main shaft arranged on the shell, one end of the main shaft is exposed out of the shell and can be connected with an external driving source, the other end of the main shaft is connected with a first gear, one end of the male rotor is provided with a second gear which can be driven by the first gear, the other end of the male rotor is provided with a third gear, and correspondingly, the female rotor is provided with a fourth gear which can be meshed with the third gear for transmission.

In order to facilitate production and manufacture and facilitate assembly, preferably, the housing includes a first housing and a second housing, the first housing is connected to the second housing, the housing further includes a first cover and a second cover respectively connected to the first housing and the second housing, a compression cavity is disposed in the first housing, the meshing section of the male rotor and the female rotor is located in the compression cavity, two ends of the male rotor and the female rotor are respectively exposed to the compression cavity, and the compression cavity communicates the suction end and the exhaust end.

In order to enable the male rotor and the female rotor to be capable of better matching transmission, further, a first gear cavity is formed between the second shell and the second cover body, the first gear and the second gear are placed in the first gear cavity, and a first bearing and a second bearing which can enable shaft ends of the male rotor and the female rotor to be in running fit are further respectively arranged on the second shell adjacent to the first gear cavity.

Furthermore, a second gear cavity is formed between the first shell and the first cover body, a third gear and a fourth gear are placed in the second gear cavity, and a third bearing and a fourth bearing which can be used for enabling shaft ends of the male rotor and the female rotor to be in running fit with each other are further respectively arranged on the first shell adjacent to the second gear cavity.

In order to prevent the lubricating oil in the gear cavity from leaking into the compression cavity, a first sealing element and a second sealing element which can rotate relative to the male rotor are further respectively sleeved on two shaft end parts of the male rotor, the outer peripheral surface of the first sealing element is embedded in the second shell and is adjacent to the compression cavity, and the outer peripheral surface of the second sealing element is embedded in the first shell and is adjacent to the compression cavity.

Furthermore, two shaft ends of the female rotor are respectively sleeved with a third sealing element and a fourth sealing element which can rotate relative to the female rotor, the peripheral surface of the third sealing element is embedded in the second shell and close to the compression cavity, and the peripheral surface of the fourth sealing element is embedded in the first shell and close to the compression cavity.

For making the gear train in the first gear chamber can have better lubricated effect, further, still be equipped with the gear pump in the first gear chamber, the one end of this gear pump be connected with can with the driven fifth gear of first gear engagement, this gear pump can make the lubricating oil in the first gear chamber form the circulation from the upwards flow.

In order to make the compressor adapt to more use environments and provide air inlet in multiple directions, the air suction end further comprises a first air suction port and a second air suction port which are arranged on two sides of the first shell, and an air suction cover plate is detachably arranged on the first air suction port or the second air suction port.

Can exhaust to a plurality of directions in order to make this compressor can adapt to more service environment, the exhaust end including setting up first gas vent, the second gas vent and the setting of first casing both sides are in the third gas vent at first casing top, be provided with detachable first exhaust cover plate on first gas vent or the second gas vent, be provided with detachable second exhaust cover plate on the third gas vent.

Compared with the prior art, the utility model has the advantages of: through set up second gear and third gear respectively at positive rotor both ends, it still is provided with the fourth gear to set up in the one end that negative rotor is close to the third gear, actuating mechanism drives first gear revolve and then drives positive rotor and rotate, third gear on the positive rotor drives the fourth gear on the negative rotor and then drives the negative rotor and rotate, because drive positive rotor pivoted second gear and drive the both ends that negative rotor pivoted fourth gear is located positive rotor and negative rotor meshing section respectively, make the equilibrium that the atress at both ends becomes, dynamic balance keeps good, the operation also becomes stable, the life of positive rotor and negative rotor has been strengthened greatly.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is an exploded view of the present embodiment;

FIG. 3 is a schematic sectional view of the present embodiment;

fig. 4 is a partially exploded view of another embodiment.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, it is a preferred embodiment of the present invention. The twin-screw air compressor of the present embodiment mainly includes a housing 1, a male rotor 2, a female rotor 3, a first gear 8, a second gear 4, a third gear 5, a fourth gear 6, a main shaft 7, a first bearing 21, a second bearing 31, a third bearing 22, a fourth bearing 32, a first seal 23, a second seal 24, a third seal 33, a fourth seal 34, a gear pump 9, a fifth gear 10, and the like.

As shown in fig. 2, the direction indicated by the arrow a in the drawing is left, the casing 1 includes a second cover 16, a second casing 14, a first casing 13 and a first cover 15 from left to right, the second cover 16 is installed on the left side of the second casing 14, the right side of the second casing 14 is connected with the left side of the first casing 13, and the first cover 15 is installed on the right side of the first casing 13. A compression chamber 18 is provided in the first housing 13. The housing 1 is not limited to being split into four parts, and the housing 1 may be made as a single structure if necessary.

The male rotor 2 and the female rotor 3 are installed in parallel in the first housing 13, and the male rotor 2 and the female rotor 3 can be meshed in a non-contact manner, and are meshed in the compression cavity 18, two end portions of the male rotor 2 and the female rotor 3 are respectively exposed out of the compression cavity 18, the front side and the rear side of the first housing 13 are also provided with air suction ends 11, the front side and the rear side and the top end of the first housing 13 are also provided with air discharge ends 12, and the compression cavity 18 can be communicated with the air suction ends 11 and the air discharge ends 12 to form air circulation.

Referring to fig. 3, a second gear 4 capable of being driven by a driving device is disposed at the left end of the male rotor 2, a third gear 5 is disposed at the right end, correspondingly, a fourth gear 6 capable of being in meshing transmission with the third gear 5 is disposed at the right end of the female rotor 3, in addition, a first gear cavity 141 for placing a first gear set is formed between the second housing 14 and the second cover 16, the first gear set includes a first gear 8, a second gear 4 and other matched gear sets, the first gear and the fourth gear 4 and 8 are placed in the first gear cavity 141 together, a first bearing 21 and a second bearing 31 capable of being in axial rotation fit with the male rotor 2 and the female rotor 3 are further disposed on the second housing 14 adjacent to the first gear cavity 141, a second gear cavity 131 for placing the second gear set is formed between the first housing 13 and the first cover 15, the second gear set includes a third gear 5 and a fourth gear 6, the third gear 5 and the fourth gear 6 are disposed in the second gear cavity 131, and a third gear 5 and a fourth gear 6 are further disposed on the first housing 13 adjacent to the third gear cavity 131, and a female bearing 22 for rotation fit with the male rotor 2 and the female rotor 3 are further disposed on the first housing 13 adjacent to provide a fourth bearing 32. The two shaft ends of the male rotor 2 are respectively sleeved with a first sealing element 23 and a second sealing element 24 which can rotate relative to the male rotor 2, the outer peripheral surface of the first sealing element 23 is embedded in the second shell 14 and is adjacent to the compression cavity 18, the outer peripheral surface of the second sealing element 24 is embedded in the first shell 13 and is adjacent to the compression cavity 18, the two shaft ends of the female rotor 3 are respectively sleeved with a third sealing element 33 and a fourth sealing element 34 which can rotate relative to the female rotor 3, the outer peripheral surface of the third sealing element 33 is embedded in the second shell 14 and is adjacent to the compression cavity 18, and the outer peripheral surface of the fourth sealing element 34 is embedded in the first shell 13 and is adjacent to the compression cavity 18. In this embodiment, first sealing member 23, second sealing member 24, third sealing member 33 and fourth sealing member 34 all adopt the labyrinth seal of copper, and the labyrinth seal utilizes the built-in skeleton that is inside at the labyrinth seal to realize sealedly, can prevent effectively that lubricating oil in first gear chamber 141 and the second gear chamber 131 from revealing in compressing the chamber 18, simultaneously, also can prevent the main shaft wearing and tearing of male rotor 2 and female rotor 3, and then make the cost of maintenance reduction of air compressor machine.

Referring to fig. 1, a main shaft 7 is disposed on the second housing 14, one end of the main shaft 7 is exposed out of the second housing 14 and can be connected to an external driving source, the external driving source can be a motor or another power source, and the other end is located in the first gear cavity 141 and is connected to the first gear 8, in addition, a gear pump 9 is further disposed in the first gear cavity 141, one end of the gear pump 9 is further connected to the fifth gear 10, the first gear 8, the second gear 4, and the fifth gear 10 cooperate to form a first gear set for transmission, the main shaft 7 can drive the first gear 8 to rotate and further drive the fifth gear 10 to rotate, the fifth gear 10 drives the second gear 4 to rotate, finally, the gear pump 9 can operate synchronously with the male rotor 2 and the female rotor 3, and the gear pump 9 can enable the lubricating oil in the first gear cavity to flow from bottom to top to form a circulation, so that the gear set in the first gear cavity 141 can be lubricated better. In addition, an oil filling hole 17 is formed in the first housing 13, one end of the oil filling hole 17 is exposed out of the first housing 13, and the other end of the oil filling hole 17 is communicated with the second gear cavity 131 to form an oil filling channel.

Referring to fig. 2 and 4, in order to make the compressor adapt to more use environments and provide air intake and exhaust in multiple directions, the air intake end 11 includes a first air intake port 11a and a second air intake port 11b disposed at the front and rear sides of the first housing 13, the first air intake port 11a and the second air intake port 11b can form a common air intake port penetrating the compression chamber 18, an air intake cover plate 11c is detachably disposed on the first air intake port 11a or the second air intake port 11b, which side can be selected according to actual needs to exhaust air, and then the air intake cover plate 11c is mounted on the other side. The exhaust end 12 includes a first exhaust port 12a, a second exhaust port 12b and a third exhaust port 12c, which are disposed at the front and rear sides of the first housing 13, and the third exhaust port 12c is disposed at the top of the first housing 13, the first exhaust port 12a, the second exhaust port 12b and the third exhaust port 12c also have a common air outlet to pass through the compression chamber 18, the first exhaust port 12a or the second exhaust port 12b is provided with a detachable first exhaust cover plate 12d, and the third exhaust port 12c is provided with a detachable second exhaust cover plate 12 e.

Claims

1. A twin-screw air compressor comprises

A housing (1) having a suction end (11) and a discharge end (12);

a male rotor (2) rotatably disposed within the housing (1);

the female rotor (3) is rotationally arranged in the shell (1) and is parallel to the male rotor (2) and is in meshing transmission with the male rotor; and

a drive mechanism for driving the male rotor (2);

it is characterized in that the preparation method is characterized in that,

the driving mechanism comprises a main shaft (7) arranged on a shell (1), one end of the main shaft (7) is exposed out of the shell (1) and can be connected with an external driving source, the other end of the main shaft is connected with a first gear (8), one end of a male rotor (2) is provided with a second gear (4) which can be driven by the first gear (8), the other end of the male rotor is provided with a third gear (5) and is corresponding to the third gear, and a fourth gear (6) which can be meshed with the third gear (5) and is driven is arranged on the female rotor (3).

2. The twin-screw air compressor according to claim 1, characterized in that the casing (1) comprises a first casing (13) and a second casing (14), the first casing (13) and the second casing (14) are connected, and further comprises a first cover (15) and a second cover (16) which are respectively connected to the first casing (13) and the second casing (14), a compression cavity (18) is arranged in the first casing (13), the meshing section of the male rotor (2) and the female rotor (3) is positioned in the compression cavity (18), two ends of each of the male rotor (2) and the female rotor (3) are respectively exposed to the compression cavity (18), and the compression cavity (18) is communicated with the air suction end (11) and the air discharge end (12).

3. The twin-screw air compressor as claimed in claim 2, wherein a first gear cavity (141) is formed between the second housing (14) and the second cover (16), the first gear (8) and the second gear (4) are disposed in the first gear cavity (141), and a first bearing (21) and a second bearing (31) for rotatably engaging shaft ends of the male rotor (2) and the female rotor (3) are disposed on the second housing (14) adjacent to the first gear cavity (141), respectively.

4. The twin-screw air compressor as claimed in claim 2, wherein a second gear chamber (131) is formed between the first housing (13) and the first cover (15), the third gear (5) and the fourth gear (6) are disposed in the second gear chamber (131), and a third bearing (22) and a fourth bearing (32) for rotatably engaging shaft ends of the male rotor (2) and the female rotor (3) are disposed on the first housing (13) adjacent to the second gear chamber (131).

5. The twin-screw air compressor according to any one of claims 2 to 4, characterized in that a first sealing member (23) and a second sealing member (24) which can rotate relative to the male rotor (2) are respectively sleeved on two shaft ends of the male rotor (2), the outer circumferential surface of the first sealing member (23) is embedded in the second housing (14) and is adjacent to the compression cavity (18), and the outer circumferential surface of the second sealing member (24) is embedded in the first housing (13) and is adjacent to the compression cavity (18).

6. The twin-screw air compressor according to claim 5, characterized in that a third sealing member (33) and a fourth sealing member (34) which can rotate relative to the female rotor (3) are respectively sleeved on two shaft ends of the female rotor (3), the outer circumferential surface of the third sealing member (33) is embedded in the second housing (14) and is adjacent to the compression cavity (18), and the outer circumferential surface of the fourth sealing member (34) is embedded in the first housing (13) and is adjacent to the compression cavity (18).

7. The twin-screw air compressor according to claim 6, characterised in that a gear pump (9) is further arranged in the first gear chamber (141), and a fifth gear (10) capable of meshing with the first gear (8) is connected to one end of the gear pump (9).

8. The twin-screw air compressor of claim 2, wherein the suction end (11) comprises a first suction port (11 a) and a second suction port (11 b) disposed on both sides of the first casing (13), and a suction cover plate (11 c) is detachably disposed on the first suction port (11 a) or the second suction port (11 b).

9. The twin-screw air compressor as claimed in claim 2, wherein the exhaust end (12) comprises a first exhaust port (12 a) and a second exhaust port (12 b) disposed on both sides of the first casing (13), and a third exhaust port (12 c) disposed on the top of the first casing (13), wherein a first detachable exhaust cover plate (12 d) is disposed on the first exhaust port (12 a) or the second exhaust port (12 b), and a second detachable exhaust cover plate (12 e) is disposed on the third exhaust port (12 c).