CN213808080U

CN213808080U - Oil-cooled dry screw compressor

Info

Publication number: CN213808080U
Application number: CN202021932431.9U
Authority: CN
Inventors: 周坤; 周武彬; 王业荣; 马升
Original assignee: Ningbo Baosi Energy Equipment Co Ltd
Current assignee: Ningbo Baosi Energy Equipment Co Ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-07-27
Anticipated expiration: 2030-09-07

Abstract

The utility model provides an oil-cooled dry screw compressor, which comprises a driving source, a cylinder and a gear box, wherein a compression cavity is arranged in the cylinder, a rotor I and a rotor II are arranged in the compression cavity, two ends of the compression cavity are respectively arranged into an air inlet end and an air outlet end, the air inlet end is provided with an air suction port, and the air outlet end is provided with an air outlet; the oil-gas sealing element is arranged at the air inlet end and the air outlet end of the rotor I and the rotor II, the driving source drives the rotor I to rotate in a gear meshing transmission mode, the rotor I drives the rotor II to synchronously rotate in the gear meshing transmission mode, the oil-gas sealing element further comprises an oil pump and an oil way, the air cylinder is connected with the gear box, lubricating oil is filled in the gear box, and the driving source drives the oil pump to suck lubricating oil from the gear box and supply the lubricating oil to all gears for driving the rotor I and the rotor II along the oil way. The oil-gas sealing element can ensure that the compression cavity is oilless, oil is supplied and lubricated by the oil pump, the rotating speed required by the oil pump is low, and the generated noise is low.

Description

Oil-cooled dry screw compressor

Technical Field

The utility model relates to a technical field of compressor more precisely relates to an oil cooling dry-type screw compressor.

Background

The application of oil-free compressors in the industries of food, medical treatment, textile and the like is more and more concerned by the public, and particularly, the compressor for conveying powder needs to ensure that the powder to be conveyed is not polluted by oil gas, and the whole conveying process needs to be carried out in an oil-free environment. In the prior art, a compression cavity of an oil-free screw compressor is oil-free, but a bearing and a gear for transmission need to be sufficiently lubricated to prevent the compressor from generating a large amount of friction heat during operation, so that a transmission part is deformed to shorten the service life of the compressor. Common oil-free screw compressor lubricates the cooling for bearing and gear through the oil slinger, because the oil slinger lubrication needs higher rotational speed just can reach lubricated effect, and the rotational speed height can make the noise grow.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an oil-cooled dry screw compressor, simple structure is compact, and the noise is low, can guarantee that the compression chamber is oilless, can use again in driven bearing and gear can both obtain abundant, accurate lubrication again.

The technical solution of the utility model is to provide an oil-cooled dry screw compressor, which comprises a driving source, a cylinder and a gear box, wherein a compression cavity is arranged in the cylinder, a rotor I and a rotor II are arranged in the compression cavity, two ends of the compression cavity are respectively arranged into an air inlet end and an air outlet end, the air inlet end is provided with an air suction port, and the air outlet end is provided with an air exhaust port; the oil-gas sealing element is arranged at the air inlet end and the air outlet end of the rotor I and the rotor II, the driving source drives the rotor I to rotate in a gear meshing transmission mode, the rotor I drives the rotor II to synchronously rotate in the gear meshing transmission mode, the oil-gas sealing element further comprises an oil pump and an oil way, the air cylinder is connected with the gear box, lubricating oil is filled in the gear box, and the driving source drives the oil pump to suck lubricating oil from the gear box and supply the lubricating oil to all gears for driving the rotor I and the rotor II along the oil way.

Compared with the prior art, the utility model discloses an oil-cooled dry-type screw compressor has following advantage: oil-gas sealing elements are arranged at the air inlet end and the air outlet end of the rotor I and the rotor II respectively, so that the compression cavity can be ensured to be oilless; the driving source drives the oil pump to suck lubricating oil from the gear box and supply the lubricating oil to all the gears for driving the rotor I and the rotor II along the oil path, so that the gears can be fully and accurately lubricated, and the structure is simple and compact; the oil pump is used for supplying oil for lubrication, the rotating speed required by the oil pump is low, and the generated noise is low.

Preferably, rotor I and rotor II are connected with the cylinder through bearings, and the driving source drives the oil pump to supply lubricating oil to the bearings on rotor I and rotor II along oil paths respectively. By adopting the structure, the bearing between the rotor I and the bearing between the rotor II and the cylinder can be lubricated fully and accurately by using the oil pump for supplying oil for lubrication.

Preferably, rotor I is provided with bearing III and bearing IV and is connected with the cylinder on exhaust end one side, and rotor II also is provided with two bearings and is connected with the cylinder on exhaust end one side. By adopting the structure, the rotor I and the rotor II can be fully protected, and the bearings of the rotor I and the rotor II on one side of the exhaust end can be fully and accurately lubricated.

Preferably, all the transmission gears are disposed at one side of the discharge end of the compression chamber. By adopting the structure, the transmission gear and the bearing which are lubricated by oil supplied by the oil pump are positioned on one side of the exhaust end, so that the oil way is convenient to arrange.

Preferably, the oil-gas sealing element arranged on one side of the exhaust end of the rotor I comprises a sealing ring I and an oil deflector ring, the sealing ring I is used for preventing gas in the compression cavity from leaking, and the oil deflector ring is used for preventing lubricating oil from entering the compression cavity along the rotor I; the oil-gas sealing piece of rotor II set up on one side of the exhaust end comprises a sealing ring and an oil scraper ring, the sealing ring and the oil scraper ring are used for preventing lubricating oil from flowing to rotor II, and the sealing ring prevents gas in the compression cavity from leaking. By adopting the structure, lubricating oil can be prevented from entering the compression cavity along the rotor I or the rotor II, and gas leakage in the compression cavity can be prevented.

Preferably, the driving source comprises a main shaft, bearings are arranged between the main shaft and the cylinder and between the main shaft and the gear box, and the driving source drives the oil pump to respectively supply lubricating oil to the bearings of the main shaft along oil paths. By adopting the structure, the bearing of the main shaft can be fully and accurately lubricated.

Preferably, an air inlet seat is arranged at the air inlet end of the compression cavity, a bearing I and a bearing II are arranged on one side of the air inlet end of the rotor I and connected with the air inlet seat, and the bearing I and the bearing II are lubricated by grease; and the rotor II is also provided with two bearings on one side of the air inlet end to be connected with the air inlet seat, and the two bearings are lubricated by grease. By adopting the structure, the load of the rotor I and the rotor II on one side of the air inlet end is small, the effect of lubricating a bearing can be achieved by adopting grease lubrication, and the arrangement of a complex oil way is avoided.

Preferably, the oil-gas sealing element arranged on one side of the air inlet end of the rotor I comprises a sealing element I, a retainer ring and a sealing element II, and the retainer ring is supported between the sealing element I and the sealing element II; the oil-gas sealing element arranged on one side of the air inlet end of the rotor II comprises two sealing elements, and a check ring is also arranged between the two sealing elements. By adopting the structure, the retainer ring is supported between the two sealing elements, so that the two sealing elements can not generate axial movement, the sealing effect is ensured, the two sealing elements can prevent grease from entering the compression cavity along the rotor I or the rotor II, and gas in the compression cavity can be prevented from leaking out.

Preferably, rotor I and rotor II all are provided with the shield on inlet end one side. By adopting the structure, the dust cover can prevent dust in the air from entering the air inlet seat and finally entering the compression cavity.

Preferably, the air inlet seat is also provided with an air hole. By adopting the structure, external air enters the compression cavity from the air suction port through the air inlet seat, and when more air enters the air inlet seat than is sucked into the compression cavity, redundant air can be discharged out of the air inlet seat through the air holes.

Drawings

Fig. 1 is a schematic view of the internal structure of the oil-cooled dry screw compressor of the present invention.

As shown in the figure: 1. the air inlet adapter base 2, the dust cover 3, the air inlet base 4, the bearing pressing blocks I, 5, the bearings I, 6, the bearings II, 7, the sealing elements I, 8, the retainer rings 9, the sealing elements II, 10, the rotors I, 11, the sealing rings I, 12, the bearings III, 13, the bearings IV, 14, the bearing pressing blocks II, 15, the main shaft 16, the sealing rings II, 17, the bearings V, 18, the oil retainer rings 19, the air cylinders, 20, the gear box 21, the speed-increasing gears I, 22, the oil pump 23, the locking nuts 24, the speed-increasing gears II, 25, the synchronous gears I, 26, the synchronous gears II, 27, the rotors II, 28, the driving blocks 29 and the oil suction ports.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

As shown in fig. 1, the utility model discloses an oil-cooled dry screw compressor includes the driving source, cylinder 19, gear box 20, cylinder 19's one end and gear box 20 sealing connection, lubricating oil is equipped with in the gear box 20, cylinder 19's the other end is provided with air intake seat 3, be provided with the induction port on the air intake seat 3, be connected with air intake adapter 1 on the air intake seat 3, two sides of cylinder 19 respectively are provided with a gas vent, be provided with the compression chamber in the cylinder 19, be provided with rotor I10 and rotor II 27 in the compression chamber, the one end of rotor I10 and rotor II 27 all is connected with air intake seat 3 and is linked together with the induction port, the other end of rotor I10 and rotor II 27 is spacing on cylinder 19 and is linked together with the gas vent.

A bearing I5 and a bearing II 6 are arranged between one side of the air inlet end of the rotor I10 and the air inlet seat 3, and the bearing I5 and the bearing II 6 are lubricated by grease; the rotor I10 is further provided with a bearing pressing block I4, and the bearing pressing block I4 is used for pressing the bearing I5 to prevent the bearing I5 and the bearing II 6 from axially moving; a sealing element I7, a check ring 8 and a sealing element II 9 are sequentially arranged between the bearing II 6 and the cylinder 19, the check ring 8 is supported between the sealing element I7 and the sealing element II 9, so that the sealing element I7 and the sealing element II 9 cannot axially move, the sealing effect is ensured, the sealing element I7 and the sealing element II 9 can prevent grease from entering a compression cavity along a rotor I10, and the sealing element II 9 can also prevent gas in the compression cavity from leaking out; still be provided with shield 2 on rotor I10, shield 2 is located air inlet seat 3 and adjacent with bearing briquetting I4, and shield 2 is arranged in preventing the dust in the air from getting into air inlet seat 3 through air inlet adapter 1. The connection structure of the rotor II 27 on one side of the air inlet end is the same as that of the rotor I10, a bearing pressing block and two bearings are also arranged between the rotor II 27 and the air inlet seat 3, the two bearings are lubricated by grease, one of the bearings is adjacent to the air cylinder 19, two sealing pieces are also arranged between the one of the bearings and the air cylinder 19, a check ring is also arranged between the two sealing pieces, and a dust cover for preventing dust in air from entering the air inlet seat 3 through the air inlet adapter seat 1 is also arranged on the rotor II 27. The air inlet seat 3 can be also provided with air holes, external air enters the air cylinder from the air suction port through the air inlet seat, and when more air enters the air inlet seat than is sucked into the air cylinder, redundant air can be discharged out of the air inlet seat through the air holes.

The rotor I10 is sequentially provided with a sealing ring I11, an oil retainer ring 18, a bearing III 12, a bearing IV 13 and a bearing pressing block II 14 on one side of an exhaust end, the bearing pressing block II 14 is used for limiting the bearing IV 13 and preventing the bearing III 12 and the bearing IV 13 from axially moving, the bearing III 12 and the bearing IV 13 are lubricated by lubricating oil, the sealing ring I11 and the oil retainer ring 18 can prevent the lubricating oil from entering a compression cavity along the rotor I10, and the sealing ring I11 can also prevent gas in the compression cavity from leaking out; the rotor I10 is further provided with a synchronous gear I25, an accelerating gear II 24 and a gear pressing block 23, and the gear pressing block 23 is used for limiting the accelerating gear II 24 and preventing the synchronous gear I25 and the accelerating gear II 24 from generating axial movement. Rotor II 27 has set gradually sealing ring, oil scraper ring, two bearings, bearing briquetting, synchronous gear II 26, gear briquetting in exhaust end one side, and these two bearings also adopt lubricating oil lubrication, and sealing ring, oil scraper ring are used for preventing that the lubricating oil from flowing to rotor II 27 on, and the gas that the sealing ring stopped in the compression chamber reveals away. The synchronous gear I25 is in meshed transmission with the synchronous gear II 26.

The driving source is installed on a cylinder 19 and a gear box 20, and comprises a main shaft 15, a speed-up gear I21 is arranged on the main shaft 15, the speed-up gear I21 is in meshing transmission with a speed-up gear II 24, a bearing V17 and a sealing ring II 16 are arranged between the main shaft 15 and the cylinder 1, a bearing is also arranged between the main shaft 15 and the gear box 20, one end of the main shaft 15 extends out of the cylinder 19 and is used for connecting a driving motor, the other end of the main shaft 15 extends out of the gear box 20 and is connected with an oil pump 22, a driving block 28 is arranged on the oil pump 22, the driving block 28 is driven by the main shaft 15 to rotate, an oil supply way is arranged in the gear box 20, an oil suction port 29 of the oil way is arranged at the bottom of the gear box 20, and a plurality of oil outlets are also arranged on the oil way. The driving block 28 rotates along with the main shaft 15 to pressurize the oil pump 22, and the lubricating oil in the gear box 20 is sucked from the oil suction port 29, filtered by an oil filter, enters the oil pump 22, and is sprayed out from each oil outlet along the oil path. The utility model discloses in, all be provided with the oil-out at the meshing position of I21 and II 24 of increasing gear, the bearing position on I25 and II 26 of synchronizing gear, the bearing position on rotor I10, the bearing position on II 27 of rotor and the bearing position on main shaft 15.

The utility model discloses an oil-cooling dry-type screw compressor during operation, main shaft 15 drives increasing gear I21, drive block 28 rotates, increasing gear I21 meshes the transmission and makes rotor I10 rotate to increasing gear II 24, synchronizing gear I25 rotates and meshes the transmission to synchronizing gear II 26 along with rotor I10, make rotor II 27 and I10 synchronous rotation of rotor, rotor I10 and II 27 rotations of rotor are breathed in, make outside air follow the induction port through admitting air adapter 1 and air inlet seat 3 and get into the compression intracavity along the axial and compress, it is outside two gas vents discharge cylinder 19 to follow again. In the process, the driving block 28 rotates along with the main shaft 15 to pressurize the oil pump 22, lubricating oil in the gear box 20 is sucked from the oil suction port 29, passes through the oil filter and filtered oil pump 22 and is sprayed out from each oil outlet along an oil supply path, and the lubricating oil lubricates the speed increasing gear I21 and the speed increasing gear II 24, the synchronous gear I25 and the synchronous gear II 26, the bearing III 12 and the bearing IV 13 on the rotor I10, the two bearings on the rotor II 27, the bearing V17 between the main shaft 15 and the air cylinder 1 and the bearing between the main shaft 15 and the gear box 20 respectively.

The above are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.

Claims

1. An oil-cooled dry screw compressor comprises a driving source, an air cylinder (19) and a gear box (20), wherein a compression cavity is arranged in the air cylinder (19), a rotor I and a rotor II are arranged in the compression cavity, two ends of the compression cavity are respectively provided with an air inlet end and an air outlet end, the air inlet end is provided with an air suction port, and the air outlet end is provided with an air exhaust port; the oil-gas sealing device is characterized by further comprising an oil pump (22) and an oil way, the air cylinder (19) is connected with the gear box (20), lubricating oil is filled in the gear box (20), and the driving source drives the oil pump (22) to suck lubricating oil from the gear box (20) and supply the lubricating oil to all gears for driving the rotor I and the rotor II along the oil way.

2. An oil-cooled dry screw compressor according to claim 1, characterized in that the rotors i and ii are connected to the cylinder (19) by bearings, and the drive source drives the oil pump (22) to supply lubricating oil along oil paths to the bearings on the rotors i and ii, respectively.

3. An oil-cooled dry screw compressor according to claim 2, characterised in that the rotor i is provided with a bearing iii (12) and a bearing iv (13) on the side of the discharge end for connection to the cylinder (19), and the rotor ii is also provided with two bearings on the side of the discharge end for connection to the cylinder (19).

4. An oil-cooled dry screw compressor as claimed in claim 3 wherein all the drive gears are disposed on one side of the discharge end of the compression chamber.

5. The oil-cooled dry screw compressor according to claim 1, wherein the oil-gas seal provided on the side of the discharge end of the rotor i comprises a seal ring i (11) and an oil slinger (18), the seal ring i (11) is used for preventing gas in the compression cavity from leaking, and the oil slinger (18) is used for preventing lubricating oil from entering the compression cavity along the rotor i; the oil-gas sealing piece of rotor II set up on one side of the exhaust end comprises a sealing ring and an oil scraper ring, the sealing ring and the oil scraper ring are used for preventing lubricating oil from flowing to rotor II, and the sealing ring prevents gas in the compression cavity from leaking.

6. An oil-cooled dry screw compressor according to claim 1, characterized in that the drive source comprises a main shaft (15), bearings are provided between the main shaft (15) and the cylinder (19) and gearbox (20), and the drive source drives the oil pump (22) to supply lubricating oil along oil paths to the bearings of the main shaft (15), respectively.

7. The oil-cooled dry screw compressor of claim 1, wherein the air inlet end of the compression cavity is provided with an air inlet seat (3), one side of the air inlet end of the rotor I is provided with a bearing I (5) and a bearing II (6) which are connected with the air inlet seat (3), and the bearing I (5) and the bearing II (6) are lubricated by grease; and the rotor II is also provided with two bearings on one side of the air inlet end to be connected with the air inlet seat (3), and the two bearings are lubricated by grease.

8. The oil-cooled dry screw compressor of claim 7, wherein the oil-gas seal arranged on the air inlet side of the rotor I comprises a seal I (7), a retainer ring (8) and a seal II (9), and the retainer ring (8) is supported between the seal I (7) and the seal II (9); the oil-gas sealing element arranged on one side of the air inlet end of the rotor II comprises two sealing elements, and a check ring is also arranged between the two sealing elements.

9. An oil-cooled dry screw compressor according to claim 1, characterized in that both rotors i and ii are provided with dust caps (2) on the side of the inlet ends.

10. Oil-cooled dry screw compressor according to claim 1, characterized in that the air inlet seat (3) is also provided with air vents.