CN214118470U - Compressor for vehicle - Google Patents

Abstract

The utility model provides a vehicle compressor, which comprises a driving source, a cylinder, a power box and an air inlet seat which are arranged in a host, wherein the cylinder is connected with the air inlet seat at the air inlet side, and the cylinder is connected with the power box at the air outlet side; a compression cavity is arranged in the cylinder, a female rotor and a male rotor which are meshed with each other are arranged in the compression cavity, and the female rotor and the male rotor are connected with a bearing and an oil-gas sealing element at the air inlet end and the air outlet end; a transmission system is arranged in the power box, and the driving source drives the female rotor and the male rotor to rotate through the transmission system; the air inlet seat is provided with an axial opening, and the mounting parts of the bearings at the air inlet ends of the female rotor and the male rotor are provided with axial reinforcing ribs. The axial strengthening rib enlarges the radiating surface of the bearing mounting part at the air inlet end, the female rotor and the male rotor can axially intake air through the axial opening when in operation, and the airflow which axially admits air can flow through the axial strengthening rib and accelerate the cooling of the bearings at the air inlet ends of the female rotor and the male rotor.

Description

Compressor for vehicle

Technical Field

The utility model relates to a technical field of compressor more exactly relates to a compressor for vehicle.

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 sufficient lubrication, so that the compressor is prevented from generating a large amount of friction heat in the operation process, and the transmission part is prevented from generating thermal deformation, so that the service life of the compressor is shortened, and therefore, a reasonable cooling measure is taken for the transmission part, which is one of keys for ensuring the long-term stable operation of the oil-free compressor. The common oil-free screw compressor lubricates a bearing and a gear through an oil slinger and performs air cooling by a fan, and the lubrication effect can be achieved only by the high rotating speed of the oil slinger, so that the noise is increased due to the high rotating speed; in addition, the operation of the fan consumes kinetic energy and increases noise.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a vehicle compressor, simple structure is compact, and the noise is low, is suitable for to the small and exquisite vehicle compressor of volume, can guarantee that the compression chamber is oilless, can use again to obtain abundant cooling in driven part.

The technical solution of the utility model is to provide a vehicle compressor, which comprises a driving source, a cylinder, a power box and an air inlet seat which are arranged in a host machine, wherein the cylinder is connected with the air inlet seat at the air inlet side, and the cylinder is connected with the power box at the air outlet side; a compression cavity is arranged in the cylinder, a female rotor and a male rotor which are meshed with each other are arranged in the compression cavity, and the female rotor and the male rotor are connected with a bearing and an oil-gas sealing element at the air inlet end and the air outlet end; a transmission system is arranged in the power box, and the driving source drives the female rotor and the male rotor to rotate through the transmission system; the air inlet seat is provided with an axial opening, and the mounting parts of the bearings at the air inlet ends of the female rotor and the male rotor are provided with axial reinforcing ribs.

Compared with the prior art, the utility model discloses a vehicle compressor has following advantage: the axial reinforcing ribs enlarge the heat radiating surface of the bearing mounting part at the air inlet end, the female rotor and the male rotor can axially intake air through the axial openings when in operation, the airflow which axially enters the air can flow through the axial reinforcing ribs and accelerate the cooling of the bearings at the air inlet ends of the female rotor and the male rotor, and the bearings at the air inlet end can be fully cooled; the female rotor and the male rotor are connected with oil-gas sealing elements at the air inlet end and the air outlet end, so that the compression cavity can be ensured to be oilless.

Preferably, the air inlet seat is provided with a bearing hole, a bearing of the female rotor and the male rotor at the air inlet end is arranged in the bearing hole, and the axial reinforcing rib is arranged on the outer side wall of the bearing hole. By adopting the structure, the axial reinforcing ribs on the outer side wall of the bearing hole can accelerate the heat dissipation and cooling of the bearing in the bearing hole under the action of axial airflow.

Preferably, the female rotor and the male rotor are provided with dust caps at the end parts corresponding to the bearings at the air inlet end, the dust caps are both convex and internally provided with grease, and the grease is used for lubricating the bearings at the air inlet end of the female rotor (25) and the male rotor (26). By adopting the structure, the dust cover can prevent dust in the air from entering the air inlet cavity, is designed into a convex type and has larger storage space, and can be added with sufficient grease to ensure that the bearing at the air inlet end can be lubricated, thereby avoiding the problems of overlarge oil tank capacity, complicated oil supply circuit and overlarge oil pump power caused by that the bearing at the air inlet end and the bearing at the air outlet end adopt lubricating oil for lubrication simultaneously, and leading the integral structure of the vehicle compressor of the utility model to be compact and simple; the power output of the driving source can be reduced, and the noise can be reduced.

Preferably, the dust cover is a thin steel piece. By adopting the structure, the thin steel piece is beneficial to heat dissipation and can accelerate the cooling of grease.

Preferably, the dust caps are positioned in the air inlet seat, and grease adding holes are formed in the air inlet seat corresponding to the two dust caps. By adopting the structure, the grease adding hole facilitates later-stage grease addition in the dust cover in the process of equipment maintenance.

Preferably, the oil-gas sealing element of the female rotor and the male rotor at the air inlet end is positioned between the bearing at the air inlet end and the air cylinder, and the oil-gas sealing element sequentially comprises a sealing ring, a piston disc and a carbon ring arranged on the piston disc. By adopting the structure, the sealing ring can prevent grease from leaking into the air inlet cavity, and the carbon ring arranged on the piston disc can prevent the grease from sucking into the compression cavity and prevent gas in the compression cavity from leaking out.

Preferably, the sealing ring is divided into a movable ring and a fixed ring, the fixed ring is fixed by a clamp spring, and the movable ring moves along with the female rotor or the male rotor. By adopting the structure, the sealing effect of mutual matching between the movable ring and the static ring is better, and grease can be prevented from leaking into the air inlet cavity.

Preferably, the female rotor and the male rotor are respectively provided with a retaining ring at two sides of the bearing at the air inlet end. By adopting the structure, the retainer ring can make the grease stay on the bearing as much as possible, and the grease is prevented from being separated from the bearing and leaking into the air inlet cavity.

Preferably, the host is internally provided with air holes I corresponding to the positions of the sealing ring and the piston disc, and the air holes I are used for balancing the pressure difference between the air inlet seat and the external environment. By adopting the structure, when the air entering the air inlet seat is more than the air sucked into the air inlet cavity, the redundant air can be discharged out of the air inlet seat through the air holes I, so that the grease leakage to the air inlet cavity caused by overlarge air pressure in the air inlet seat is prevented.

Preferably, a lubricating oil lubricating system is arranged in the main engine, the power box is a gear box, the transmission system is a gear transmission system, the gear transmission system comprises gear sets which are meshed with each other, the lubricating oil lubricating system comprises an oil tank, an oil pump, an oil filter, an oil path and lubricating oil stored in the oil tank, oil nozzles are arranged at positions of the oil path corresponding to the gear sets which are meshed with each other in the gear transmission system, and bearings of the female rotor and the male rotor at the exhaust end, and the driving source drives the oil pump to operate so that the lubricating oil in the oil tank enters the oil path through the oil filter and is sprayed to the bearings of the gears, the female rotor and the male rotor in the gear transmission system at the exhaust end through the oil nozzles. By adopting the structure, the gear in the gear transmission system, the bearings of the female rotor and the male rotor at the exhaust end can be fully and accurately lubricated.

Preferably, an oil collecting plate is arranged above the mutually meshed gear sets in the gear transmission system, and the oil collecting plate is used for blocking lubricating oil thrown out by the mutually meshed gear sets and enabling the lubricating oil on the oil collecting plate to flow to the mutually meshed gear sets along the oil collecting plate. By adopting the structure, the utilization rate and the lubricating efficiency of lubricating oil can be improved, the loss of the lubricating oil on the mutually meshed gear sets is avoided, and the gear sets are sufficiently lubricated.

Preferably, the oil-gas sealing pieces of the female rotor and the male rotor at the exhaust end are both positioned between the cylinder and the bearing at the exhaust end, the oil-gas sealing pieces sequentially comprise sealing rings and oil slingers, and the oil slingers are used for rotating, centrifuging and slinging lubricating oil to the wall of the inner cavity of the main engine at corresponding positions. By adopting the structure, the sealing ring and the oil deflector can prevent lubricating oil from entering the compression cavity, and the sealing ring can also prevent gas in the compression cavity from leaking out.

Preferably, a ventilation hole II is formed in the position, corresponding to the position between the sealing ring and the oil retainer ring, in the main machine and used for balancing the pressure difference between the outer sealing ring of the compression cavity and the outside atmosphere. By adopting the structure, a small amount of gas leaked out from the compression cavity can be discharged through the air holes II, so that the pressure difference between the compression cavity and the sealing ring is kept, and the lubricating oil is prevented from leaking into the compression cavity along the rotor because high-pressure gas enters the gear box.

Preferably, an oil leakage channel is arranged at a position corresponding to the oil slinger in the main engine, the oil leakage channel is communicated with the oil tank, and the lubricating oil thrown to the corresponding position by the oil slinger on the inner cavity wall of the main engine can flow back to the oil tank along the oil leakage channel. By adopting the structure, the utilization rate of lubricating oil can be improved, and the lubricating oil is prevented from being lost in a main machine and being incapable of lubricating the bearing and the gear.

Preferably, the driving source comprises a main shaft, the main shaft is connected with an external driving motor and drives the female rotor and the male rotor to rotate through a gear transmission system, and the oil pump is also driven by the main shaft to operate; the main shaft is connected with a bearing, the position of the bearing connected with the main shaft is also provided with an oil injection port, and the lubricating oil lubricating system injects oil to lubricate the bearing connected with the main shaft. By adopting the structure, the main shaft with low rotating speed is adopted for driving, the noise can be reduced, the bearing load of the female rotor and the male rotor at the air inlet end is small, the lubricating requirement can be met by adopting grease lubrication, and the bearing connected on the main shaft can be fully and accurately lubricated by adopting oil injection lubrication.

Preferably, one part of the oil tank is positioned at the bottom of the gear box, and the other part of the oil tank is positioned below the cylinder in the main machine, and the bottom of the air inlet seat is provided with an air inlet seat radial air suction channel; when the female rotor and the male rotor operate, the air inlet seat can perform radial air inlet through the radial air suction channel of the air inlet seat. By adopting the structure, when the air inlet seat carries out radial air inlet through the radial air suction channel of the air inlet seat, partial heat of the female rotor and the male rotor on the bearing of the air inlet end can be taken away by radial air flow, the cooling of the bearing and grease of the air inlet end is accelerated, the air flow velocity at the bottom of the main machine can be increased, the oil tank below the air cylinder is cooled, and the cooling of lubricating oil in the oil tank is also accelerated.

Drawings

Fig. 1 is a schematic structural diagram of the vehicular compressor of the present invention.

Fig. 2 is a cross-sectional view taken in the transverse direction a-a of fig. 1.

Fig. 3 is a longitudinal B-B sectional view of fig. 1.

Fig. 4 is a front view of an air inlet seat of a vehicular compressor according to the present invention.

Fig. 5 is a sectional view taken along the direction C-C of fig. 4.

Fig. 6 is a cross-sectional view taken in the transverse direction D-D of fig. 1.

Fig. 7 is a left side view of fig. 1.

Fig. 8 is a sectional view taken along the direction F-F of fig. 7.

Fig. 9 is a sectional view taken along the direction G-G of fig. 8.

Fig. 10 is a sectional view of an oil pump of a vehicle compressor according to the present invention.

Fig. 11 is a schematic view of an oil passage in the compressor for a vehicle according to the present invention.

As shown in the figure: 1. a pump cover, 2, a pump base, 3, a pump gear I, 4, a pump gear II, 8, a driving block, 9, a main shaft, 11, an oil filter 11, 21, a gear box, 22, a cylinder, 23, an air inlet base, 24, an air inlet, 25, a female rotor, 26, a male rotor, 27, a bearing base, 28, a synchronous gear I, 29, a synchronous gear II, 30, an air outlet, 31, a speed increasing gear I, 32, a speed increasing gear II, 33, an oil pump bearing, 34, a bearing I, 35, a bearing II, 36, a bearing III, 37, a bearing IV, 40, an oil collecting plate, 41, a dust cover, 42, a bearing pressing block, 43, a retainer ring, 44, an air inlet bearing, 45, a sealing ring, 46, a carbon ring, 47, a piston disc, 48, a sealing ring, 49, a baffle ring, 50, an oil leakage channel, 51, a bearing pressing plate, 52, an air vent I, 53, a grease adding hole, 54, an axial reinforcing rib, 58 and a radial air suction channel of the air inlet base, 61. an oil tank 63 and an air hole II.

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, fig. 6, fig. 7 and fig. 11, the vehicular compressor of the present invention includes a driving source installed in a host, a cylinder 22, a gear box 21, one end of the cylinder 22 is hermetically connected with the gear box 21, a gear transmission system, an oil pump and an oil tank 61 are provided in the gear box 21, the gear transmission system includes a speed increasing gear i 31, a speed increasing gear ii 32, a synchronizing gear i 28 and a synchronizing gear ii 29, the oil tank 61 is located at the bottom of the gear box 21, lubricating oil is contained in the oil tank 61, the cylinder 22 is provided with an exhaust port 30 at one side of the gear box 21, the other end of the cylinder 22 is provided with an air inlet seat 23, and the air inlet seat 23 is provided with an air inlet 24; a compression cavity is arranged in the cylinder 22, a female rotor 25 and a male rotor 26 which are meshed with each other are arranged in the compression cavity, one ends of the female rotor 25 and the male rotor 26 are connected with the air inlet seat 23 and communicated with the air inlet 24, and the other ends of the female rotor 25 and the male rotor 26 are limited on the cylinder 22 and communicated with the air outlet. The driving source is installed on cylinder 22 and gear box 21, including main shaft 9, be connected with increasing gear I31 on the main shaft 9, be connected with increasing gear II 32 on the negative rotor 25, increasing gear I31 is to increasing gear II 32 meshing transmission, make main shaft 9 can drive negative rotor 25 and rotate, still be connected with synchronous gear I28 on the negative rotor 25, be connected with synchronous gear II 29 on the positive rotor 26, synchronous gear I28 is to synchronous gear II 29 meshing transmission, make negative rotor 25 can drive positive rotor 26 synchronous rotation. The main shaft 9 is also connected with a driving block 8, the main shaft 9 drives an oil pump to operate through the driving block 8, the main shaft 9 is low in rotating speed, the oil pump is driven by the main shaft to be low in rotating speed, and the working condition is good.

As shown in fig. 2, air inlet bearings 44 are disposed between the female rotor 25 and the male rotor 26 and the air inlet seat 23, and bearing pressing blocks 42 are disposed outside the air inlet bearings 44, and the bearing pressing blocks 42 are used for pressing the air inlet bearings 44 to prevent the air inlet bearings 44 from moving axially. The utility model discloses an among the vehicle compressor, because main shaft 9 rotational speed is low, the air inlet bearing 44 load that corresponds is little, can adopt the grease lubrication, need not be located the oil tank 61 and the oil pump of exhaust side to its fuel feeding, can reduce the discharge capacity of the size of oil tank 61 and oil pump, makes the utility model discloses a vehicle compressor overall structure is compact simple. The specific structure associated with grease lubrication is shown in fig. 2 to 5. As shown in fig. 2, the ends of the female rotor 25 and the male rotor 26 on the side of the air intake bearing 44 are each provided with a dust cap 41, and the dust caps 41 are located outside the bearing block 42 and can prevent dust in the air from entering the air intake seat 23; the dust cover 41 is designed to be convex, so that a large storage space is provided, and sufficient grease can be added into the dust cover to ensure that the air inlet bearing 44 can be lubricated; the dust cover 41 is a thin steel member, which is advantageous for heat dissipation and can accelerate cooling of grease. All be provided with seal structure between inlet bearing 44 and the cylinder 22 on negative rotor 25 and the positive rotor 26, seal structure include sealing washer 45 in proper order, piston disc 47 and the carbocycle 46 of setting on piston disc 47, sealing washer 45 divide into rotating ring and quiet ring, quiet ring is fixed by the jump ring, the rotating ring is along with negative rotor 25 or the motion of positive rotor 26, inlet bearing 44's both sides still are provided with retaining ring 43 respectively, retaining ring 43 and sealing washer 45 can prevent that the grease from revealing the chamber of admitting air, it then can avoid the grease to inhale the compression chamber to set up carbocycle 46 on the piston disc 47, this seal structure can also prevent the gas in the compression chamber to reveal away. As shown in fig. 4 and 5, the air inlet seat 23 is provided with an axial opening for allowing axial air inlet, and the outer side wall of the bearing hole for mounting the air inlet bearing 44 on the air inlet seat 23 is further provided with an axial rib 54, so that in the axial air inlet process, air passes through the axial rib 54 to carry away heat on the axial rib 54, and cooling of the air inlet bearing 44 and grease in the bearing hole is accelerated. As shown in fig. 3, the air inlet seat 23 is provided with an air vent i 52 at a position corresponding to the sealing ring 45 and the piston disc 47, the air vent i 52 is used for balancing a pressure difference between the air inlet seat 23 and an external environment, when air entering the air inlet seat 23 is more than air sucked into the air inlet cavity, the redundant air can be discharged out of the air inlet seat 23 through the air vent i 52, and grease leakage to the air inlet cavity due to overlarge air pressure in the air inlet seat 23 is prevented. As shown in fig. 1, grease adding holes 53 are formed in the positions, corresponding to the two dust covers 41, of the air inlet seat 23, so that grease can be conveniently added in the later period of equipment maintenance.

As shown in fig. 3 and 6, the cylinder 22 is provided with a bearing seat 27 on the exhaust side, the female rotor 25 is provided with a sealing ring 48, an oil retainer ring 49, a bearing iv 37, a bearing iii 36 and a bearing pressure plate 51 in sequence between the exhaust side and the cylinder 22, the bearing iv 37 and the bearing iii 36 are both mounted on the bearing seat 27, and the bearing pressure plate 51 is arranged at the end of the bearing iii 36 and limits the bearing iii 36 to prevent the bearing iv 37 and the bearing iii 36 from moving axially. The utility model discloses an among the automobile-used compressor, bearing IV 37, bearing III 36 adopt lubricating oil lubrication, and sealing ring 48, oil scraper ring 49 can prevent that lubricating oil from entering into the compression intracavity along negative rotor 25, and sealing ring 48 can also prevent that the gas in the compression intracavity from revealing away. The male rotor 26 is also provided with a sealing ring, an oil retainer ring, two bearings and a bearing pressing block between the exhaust side and the cylinder 22 in sequence, the two bearings are also mounted on the bearing seat 27 and lubricated by lubricating oil, the sealing ring and the oil retainer ring can also prevent the lubricating oil from entering the compression cavity along the rotor, and meanwhile, the sealing ring prevents gas in the compression cavity from leaking out. As shown in fig. 3, a ventilation hole ii 63 is formed in the cylinder 22 at a position corresponding to a position between the sealing ring 48 and the oil retainer 49, the ventilation hole ii 63 is used for balancing a pressure difference between the outer sealing ring 48 of the compression cavity and the outside atmosphere, a small amount of gas leaked from the compression cavity can be discharged through the ventilation hole ii 63, the pressure difference between the compression cavity and the sealing ring 48 is maintained, and the lubricating oil is prevented from leaking into the compression cavity along the rotor due to the fact that the high-pressure gas enters the gear box.

As shown in fig. 7 to 10, a bearing i 34 is arranged between the main shaft 9 and the cylinder 22, a bearing ii 35 is arranged between the main shaft 9 and the gear box 21, one end of the main shaft 9 extends out of the cylinder 22 and is connected with a driving motor, the other end of the main shaft 9 is connected with an oil pump and a driving block 8 in the gear box 21, the main shaft 9 drives the oil pump to operate through the driving block 8, and the oil pump is embedded in the gear box 21 and locked by screws. The oil pump includes pump cover 1 and pump seat 2, screw connection is used to pump cover 1 and pump seat 2, and with the pin location, be provided with two pump shafts in the oil pump, be provided with the mounting hole that corresponds two pump shafts on pump cover 1 and the pump seat 2 respectively, all be provided with oil pump bearing 33 in the mounting hole, all be connected through oil pump bearing 33 between two pump shafts and pump cover 1 and the pump seat 2, oil pump bearing 33 is slide bearing, be connected with pump gear I3 and pump gear II 4 on two pump shafts respectively, pump gear I3 and pump gear II 4 intermeshing, one side of pump gear I3 and pump gear II 4 is equipped with oil feed passageway and oil inlet, the opposite side is equipped with out oil passageway and oil-out. The main shaft 9 drives a pump shaft connected with the pump gear I3 to rotate through the driving block 8, the pump gear I3 rotates along with the pump shaft, the pump gear I3 is meshed with the pump gear II 4 for transmission, the oil pump is enabled to operate, lubricating oil in the oil tank 61 is sucked from the oil inlet through the oil inlet channel and is discharged into the oil outlet channel from the oil outlet.

As shown in fig. 7 and 11, an oil filter 11 is disposed in the oil tank 61, an oil path for supplying oil is disposed in the gear box 21, an oil suction port of the oil path is disposed at the oil filter 11, and a plurality of oil injection ports are further disposed on the oil path, and the lubricating oil enters the oil pump after being filtered by the oil filter 11, is pressurized by the oil pump, and is then ejected from each oil injection port along the oil path. Oil spray openings are formed in the meshing position between the speed increasing gear I31 and the speed increasing gear II 32, the meshing position between the synchronizing gear I28 and the synchronizing gear II 29, the positions of the bearing IV 37 and the bearing III 36 on the exhaust side of the female rotor 25, the position of the bearing on the exhaust side of the male rotor 26, the position of the bearing I34 between the main shaft 9 and the cylinder 22 and the position of the bearing II 35 between the main shaft 9 and the gear box 21, lubricating oil is sprayed onto a gear meshing surface or bearing balls from the oil spray openings, and the lubricating oil has a good lubricating effect on the gears and the bearings. As shown in fig. 9, an oil collecting plate 40 is arranged above the synchronizing gear i 28 and the synchronizing gear ii 29, the synchronizing gear i 28 and the synchronizing gear ii 29 rotate to throw excess lubricating oil onto the oil collecting plate 40, and then the lubricating oil flows to the synchronizing gear i 28, the synchronizing gear ii 29 and the meshing position thereof along the oil collecting plate, so that the synchronizing gear i 28 and the synchronizing gear ii 29 are sufficiently lubricated. As shown in fig. 3, an oil leakage channel 50 is further provided in the cylinder 22 at a position corresponding to the oil slinger 49, the oil leakage channel 50 is communicated with an oil tank 61, the oil slinger 49 rotates and centrifuges redundant lubricating oil and slings the lubricating oil to the inner cavity wall of the main engine at the corresponding position, and then the lubricating oil flows back to the oil tank 61 along the oil leakage channel 50.

The utility model discloses a lie in cylinder 22 below also to be provided with the oil tank in the automobile-used compressor host computer, and lie in the oil tank of cylinder 22 below and the oil tank 61 intercommunication of gear box 21 bottom. As shown in fig. 5, the bottom of the air inlet seat 23 is also provided with a radial air suction channel 58 of the air inlet seat, the utility model discloses an in-process of admitting air of the vehicular compressor, the air can take away the heat on the air inlet bearing 44 through the radial air suction channel 58 of the air inlet seat, accelerates the cooling of the air inlet bearing 44 and grease, can also increase the airflow velocity of the bottom of the main engine, cools the oil tank 61 below the cylinder 22, and accelerates the cooling of the lubricating oil in the oil tank 61.

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 (16)

1. A compressor for a vehicle comprises a driving source installed in a main machine, a cylinder (22), a power box and an air inlet seat (23), wherein the cylinder (22) is connected with the air inlet seat (23) at an air inlet side, and the cylinder (22) is connected with the power box at an air exhaust side; a compression cavity is arranged in the cylinder (22), a female rotor (25) and a male rotor (26) which are meshed with each other are arranged in the compression cavity, and a bearing and an oil-gas sealing element are connected to the female rotor (25) and the male rotor (26) at the air inlet end and the air outlet end respectively; a transmission system is arranged in the power box, and a driving source drives the female rotor (25) and the male rotor (26) to rotate through the transmission system; the air inlet structure is characterized in that an axial opening is formed in the air inlet seat (23), and axial reinforcing ribs (54) are arranged on mounting parts of bearings at the air inlet ends of the female rotor (25) and the male rotor (26).

2. Compressor for vehicles according to claim 1, characterized in that the air inlet seat (23) is provided with a bearing hole, the female rotor (25) and the male rotor (26) are mounted in said bearing hole at the air inlet end, and an axial rib (54) is provided on the outer side wall of said bearing hole.

3. Compressor according to claim 2, characterized in that the female (25) and male (26) rotors are provided with dust caps (41) at the ends corresponding to the bearings of the air intake, the dust caps (41) being of the male type and containing grease for lubricating the bearings of the female (25) and male (26) rotors at the air intake.

4. Compressor for vehicles according to claim 3, characterized in that the dust cover (41) is a thin steel piece.

5. The compressor of claim 3, wherein the dust caps (41) are disposed in the air inlet seat (23), and grease adding holes (53) are formed in the air inlet seat (23) at positions corresponding to the two dust caps (41).

6. Compressor according to claim 1, characterized in that the oil-gas seal of the female rotor (25) and male rotor (26) at the inlet end, which in turn comprises a sealing ring (45), a piston disc (47) and a carbon ring (46) arranged on the piston disc (47), is located between the bearing at the inlet end and the cylinder (22).

7. Compressor for vehicles, according to claim 6, characterized in that the sealing ring (45) is divided into a moving ring and a stationary ring, the stationary ring being fixed by a circlip, the moving ring following the female rotor (25) or the male rotor (26).

8. Compressor for vehicles according to claim 6, characterized in that the female rotor (25) and the male rotor (26) are also provided with retaining rings (43) on both sides of the bearing at the inlet end, respectively.

9. The compressor for the vehicle as claimed in claim 6, wherein a ventilation hole I (52) is formed in the main unit at a position corresponding to the sealing ring (45) and the piston disc (47), and the ventilation hole I (52) is used for balancing a pressure difference between the air inlet seat (23) and an external environment.

10. The vehicular compressor according to claim 1, wherein a lubricant lubrication system is provided in the main body, the power box is a gear box (21), the transmission system is a gear transmission system, the gear transmission system comprises gear sets engaged with each other, the lubricant lubrication system comprises an oil tank (61), an oil pump, an oil filter (11), an oil passage and lubricant stored in the oil tank (61), oil injection ports are provided on the oil passage at positions corresponding to bearings at the exhaust end of the female rotor (25) and the male rotor (26) engaged with each other in the gear transmission system, and the drive source drives the oil pump to operate so that the lubricant in the oil tank (61) enters the oil passage through the oil filter (11) and is injected to the bearings at the exhaust end of the gears and the female rotor (25) and the male rotor (26) in the gear transmission system through the oil injection ports.

11. A compressor according to claim 10, wherein the oil collecting plate (40) is provided above the intermeshing gear sets in the gear train, the oil collecting plate (40) being arranged to block lubricating oil thrown off by the intermeshing gear sets and to allow lubricating oil on the oil collecting plate (40) to flow along the oil collecting plate (40) to the intermeshing gear sets.

12. Compressor for vehicles according to claim 10, characterized in that the oil-gas seals of the female rotor (25) and male rotor (26) at the exhaust end, each located between the cylinder (22) and the bearing at the exhaust end, comprise in turn a sealing ring and a slinger for centrifuging the rotation of the lubricating oil and slinging it against the main engine cavity wall in the corresponding position.

13. The vehicular compressor according to claim 12, wherein a ventilation hole ii (63) is provided at a position between the main body and the corresponding sealing ring and the oil retainer ring, and the ventilation hole ii (63) is used for balancing a pressure difference between an outer sealing ring (48) of the compression chamber and the external atmosphere.

14. Compressor for vehicles according to claim 12, characterized in that a leakage oil passage (50) is provided in the main unit at a position corresponding to the slinger, the leakage oil passage (50) communicates with the oil tank (61), and the lubricating oil thrown by the slinger to the corresponding position on the inner chamber wall of the main unit can flow back into the oil tank (61) along the leakage oil passage (50).

15. The vehicular compressor according to claim 10, wherein the driving source comprises a main shaft (9), the main shaft (9) is connected with an external driving motor and drives the female rotor (25) and the male rotor (26) to rotate through a gear transmission system, and the oil pump is driven by the main shaft (9) to operate; the main shaft (9) is connected with a bearing, an oil spray opening is also formed in the position of the bearing connected to the main shaft (9), and the lubricating oil lubricating system sprays oil to lubricate the bearing connected to the main shaft (9).

16. Compressor for vehicles according to claim 10, characterized in that the oil tank (61) is partly located at the bottom of the gear box (21) and partly below the main engine internal cylinder (22), and the bottom of the air intake seat (23) is provided with an air intake seat radial suction passage (58); when the female rotor (25) and the male rotor (26) are in operation, the air inlet seat (23) can perform radial air inlet through the air inlet seat radial air suction channel (58).

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