CN212959106U

CN212959106U - Two-stage air inlet rotary vane vacuum pump

Info

Publication number: CN212959106U
Application number: CN202021722329.6U
Authority: CN
Inventors: 肖烈熙
Original assignee: Suzhou Zhenye Industrial Co ltd
Current assignee: Suzhou Zhenye Industrial Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2021-04-13
Anticipated expiration: 2030-08-18

Abstract

The utility model discloses a two-stage rotary vane vacuum pump that admits air, including base, casing, a space cavity is constituteed with the casing to the base, and it is connected with main shaft rotor to rotate in it, the lateral surface top of casing is equipped with main suction nozzle, secondary suction nozzle along the circumferencial direction in proper order, the medial surface top of casing is equipped with the main inlet port that is linked together with main suction nozzle, the interior top surface of casing is equipped with the secondary inlet port that is linked together with secondary suction nozzle, one side that the medial surface of casing is close to main inlet port is equipped with two ventholes of arranging along casing medial surface circumferencial direction, main shaft rotor's upper end axostylus axostyle is connected with the shaft coupling, the lateral surface that is close to the shaft coupling on the casing is equipped with the inlet port that runs through, main shaft. The utility model has the advantages that: the rotation is steady, and the evacuation ability is strong, can inhale fast, external evacuation, long service life.

Description

Two-stage air inlet rotary vane vacuum pump

Technical Field

The utility model relates to the technical field of auto-parts, specifically be a two-stage rotary vane vacuum pump that admits air.

Background

The automobile has gone into thousands of households with the improvement of living standard of people, and becomes an important vehicle essential for people at present. The existing automobile adopts a vacuum suction mode, and a throat pipe of an air inlet pipe is vacuumized, so that the brake assistance of the automobile is guaranteed. And the throat of the air inlet pipe of the booster type engine has no vacuum degree, so that the brake assistance of the automobile cannot be ensured, and the vacuum pump is generated at the right moment. However, the rotary vane and the sliding block in the cavity of the shell of the existing vacuum pump are mostly connected by a spring or designed in an integrated manner, so that the consistency of the gaps among the rotary vane, the sliding block and the cavity cannot be realized, the service life of the spring is short, and the service life of the whole vacuum pump is influenced. Meanwhile, the existing vacuum pump only has one air inlet hole, the requirements of an engine supercharger and a finished automobile vacuum booster cannot be met, and meanwhile, a lubricating oil path is complex and the lubricating degree is insufficient, so that the poor stability of the rotation of a main shaft rotor is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two-stage air inlet rotary vane vacuum pump to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a two-stage rotary vane vacuum pump that admits air, includes base, casing, a space cavity is constituteed with the casing to the base, and it is connected with main shaft rotor to rotate in it, the lateral surface top of casing is equipped with main suction nozzle, secondary suction nozzle along the circumferencial direction in proper order, the medial surface top of casing is equipped with the main inlet port that is linked together with main suction nozzle, the interior top surface of casing is equipped with the secondary inlet port that is linked together with secondary suction nozzle, one side that the medial surface of casing is close to main inlet port is equipped with two ventholes of arranging along casing medial surface circumferencial direction, main shaft rotor's upper end axostylus axostyle is connected with the shaft coupling, the lateral surface that is close to the shaft coupling on the casing is equipped with the inlet port that.

Further preferably, the inner side surface of the shell is designed by a Pascal vortex line, and the spindle rotor and the shell are eccentrically arranged.

Preferably, a vertical groove is formed in the contact surface of the upper end face of the main shaft rotor in the shell, and the upper end face of the vertical groove is communicated with the oil inlet.

Preferably, the rotor is provided with a strip-shaped groove, and the rotary piece is arranged in the strip-shaped groove in a sliding manner.

Further preferably, grooves are formed in the upper side surface, the lower side surface, the left side surface and the right side surface of the rotary piece, two identical slots which are arranged vertically are formed in the grooves in the left side surface and the right side surface of the rotary piece, the sliding block is designed to be of an umbrella-shaped structure, and two identical plugs which are arranged vertically are arranged at the handle end of the umbrella-shaped structure.

Preferably, the size of the plug is smaller than that of the slot, and the size of the handle end of the sliding block is smaller than that of the grooves on the left side surface and the right side surface of the rotary piece.

Further preferably, the air outlet channel of the air outlet hole is designed to be of an L-shaped structure, the air outlet end of the air outlet hole is arranged on the upper top surface of the shell, the elastic sheet and the blocking sheet are sequentially arranged above the air outlet channel, and the blocking sheet is of an arc-shaped structure with two upward ends.

Advantageous effects

The utility model discloses a two-stage rotary vane vacuum pump that admits air, adopt the casing die cavity of pascal vortex line design, the cooperation slides the rotary vane that sets up, the slider, make the rotary vane, the clearance can be guaranteed unanimously to slider and casing medial surface, it is steady to rotate, the design of secondary suction nozzle simultaneously, guarantee the evacuation ability of vacuum pump, can breathe in fast, external evacuation, improve the displacement, and the design of inlet port, simplify the oil feed structure, improve the stability of oil feed, guarantee the degree of lubrication of each part in the casing, it is more steady to make equipment rotate, this vacuum pump structure is ingenious, long service life.

Drawings

Fig. 1 is an exploded view of a two-stage air-intake rotary vane vacuum pump as disclosed in an embodiment of the present invention;

FIG. 2 is an isometric view of a two-stage air-intake rotary vane vacuum pump as disclosed in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the inside of the casing according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a spindle rotor and a rotor plate according to an embodiment of the present invention.

Reference numerals

1-base, 2-spindle rotor, 21-shaft handle, 22-rotor, 221-strip groove, 3-rotary piece, 31-slide block, 311-plug, 32-slot, 4-shell, 41-main air inlet hole, 42-secondary air inlet hole, 43-air outlet hole, 44-oil inlet hole, 5-coupler, 6-main air inlet nozzle, 7-secondary air inlet nozzle, 8-elastic piece, 9-baffle and 10-sealing ring.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-4, a two-stage air inlet rotary vane vacuum pump comprises a base 1 and a casing 4, wherein the base 1 and the casing 4 form a space cavity, a main shaft rotor 2 is rotatably connected in the space cavity, a main air inlet 6 and a secondary air inlet 7 are sequentially arranged above the outer side surface of the casing 4 along the circumferential direction, a main air inlet 41 communicated with the main air inlet 6 is arranged above the inner side surface of the casing 4, a secondary air inlet 42 communicated with the secondary air inlet 7 is arranged on the inner top surface of the casing 4, two air outlets 43 arranged along the circumferential direction of the inner side surface of the casing 4 are arranged on one side of the inner side surface of the casing 4 close to the main air inlet 41, an upper end shaft handle 21 of the main shaft rotor 2 is connected with a coupler 5, a penetrating oil inlet 44 is arranged on the outer side surface of the casing 4 close to the coupler 5, and a lower end rotor 22, the two ends of the rotary vane 3 are respectively connected with a sliding block 31.

In this embodiment, the primary air intake nozzle 6 and the primary air intake hole 41 are disposed on the side surface of the housing 4, which is beneficial to connection of the braking system and evacuation of the braking system, and the evacuation volume is 4.6L, and evacuation is required to reach a vacuum degree of 85KPA in 29 seconds. The secondary air inlet nozzle 7 is arranged on the side face of the shell 4 and can vacuumize the outside to provide vacuum degree, the communicated secondary air inlet hole 42 is arranged on the inner top face of the shell 4 to facilitate vacuumizing operation, the aperture of the secondary air inlet hole 42 is smaller than that of the main air inlet hole 41, the emptying volume is 0.1L, and the emptying requirement is that the vacuum degree of 70KPA is reached within 2 seconds. The exhaust holes 43 are two and are all arranged on the inner side surface of the shell 4, so that air in the shell can be conveniently discharged, the impact force of the exhaust holes 43 on the elastic sheet 8 is reduced, and the service life of the shell is prolonged.

Preferably, the inner side surface of the shell 4 is designed by a pascal vortex line, the spindle rotor 2 and the shell 4 are eccentrically arranged, and the shell 4 is quickly emptied through the eccentric arrangement.

Preferably, a vertical groove is formed in the contact surface of the upper end face of the main shaft rotor 2 in the casing 4, the upper end face of the vertical groove is communicated with the oil inlet hole 44, engine oil conveniently enters the casing 4 through the oil inlet hole 44 and the groove communicated with the oil inlet hole and flows into the groove in the rotary vane 3 and then flows into a space cavity formed between the rotary vane 3 and the sliding block 31 and a space cavity formed between the casing 4 and the base 1, lubrication among the base 1, the main shaft rotor 2, the rotary vane 3, the sliding block 31 and the casing 4 is achieved, mutual friction force is reduced, operation is smoother, and meanwhile the service life of the vacuum pump is prolonged.

Preferably, a strip-shaped groove 221 is formed in the rotor 22, and the rotary piece 3 is slidably disposed in the strip-shaped groove 221, so that the rotary piece 3 can slide in the strip-shaped groove 221, and the eccentric rotation of the rotor 22 is realized.

Preferably, grooves are formed in the upper side, the lower side, the left side and the right side of the rotary piece 3, two identical slots 32 which are arranged up and down are formed in the grooves in the left side and the right side, the sliding block 31 is designed in an umbrella structure, and two identical plugs 311 which are arranged up and down are arranged at the handle end of the umbrella structure. The groove on the rotary vane 3 is convenient for the flowing of lubricating oil, and the plug 311 is inserted into the slot 32, so that the connection is simple, the assembly is convenient, and the maintenance and the replacement are convenient.

Preferably, the size of the plug 311 is smaller than that of the slot 32, the size of the handle end of the slider 31 is smaller than that of the grooves on the left and right side surfaces of the rotor 3, so that the plug 311 and the slot 32 are in sliding connection, when the rotor 22 drives the rotor 3 to eccentrically rotate, the slider 31 can always attach to the inner side surface of the casing 4, even if the slider 31 and the casing 4 are rubbed off due to long-term use, the slider 31 can automatically compensate for a gap with the casing 4 during rotation, the inner side surface of the casing 4 is ensured to always attach to, the use precision and the service life of the vacuum pump are improved, in the embodiment, the rotor 3 is made of PAEK or PPS, and the slider 31 is made of PAEK, so that the vacuum pump has the characteristics of good high impact resistance, high temperature resistance, fatigue resistance and the like, and has a long service life.

Preferably, the air outlet channel of the air outlet hole 43 is designed to be of an L-shaped structure, the air outlet end of the air outlet channel is arranged on the upper top surface of the shell 4, the spring plate 8 and the baffle plate 9 are sequentially arranged above the air outlet channel, and the baffle plate 9 is of an arc-shaped structure with two upward ends. The gas and the engine oil discharged from the gas outlet 43 are discharged outwards through the gas outlet 43 under the action of centrifugal force and pressure difference, the elastic sheet 8 is blown to enable the warping of the two ends of the elastic sheet to be separated from the upper top surface of the shell 4, the gas and the engine oil can be conveniently discharged and enter the engine at the upper end, the blocking sheet 9 is used for limiting the warping angle of the elastic sheet 8, the elastic sheet 8 is prevented from being warped too much and being incapable of returning, and meanwhile, other objects can be prevented from entering the shell 4 of the vacuum pump.

Preferably, the primary air inlet nozzle 6 is connected with a vacuum booster for vacuum suction of an automobile braking system, the secondary air inlet nozzle 7 is connected with a booster overpressure actuator, and the coupler 5 is connected with an engine rotating shaft for connecting the main shaft rotor 2 and driving the rotor 22 to rotate.

In this embodiment, the working principle of the vacuum pump is as follows: the engine passes through shaft coupling 5 drive main shaft rotor 2 and rotates, and then drives rotor 3, slider 31 laminating casing 4's medial surface and rotate, inhales the air through main suction nozzle 6, then discharges in the engine through exhaust hole 43, secondary suction nozzle 7 cooperation is breathed in, improves external vacuum speed, increases the displacement. Meanwhile, engine oil of the engine enters the shell along the oil inlet hole 44, lubricates the base 1, the spindle rotor 2, the rotary vane 3, the sliding block 31 and the shell 4, increases the lubrication degree and prolongs the service life of the vacuum pump.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the protection scope of the present invention.

Claims

1. The utility model provides a two-stage rotary vane vacuum pump that admits air, includes base (1), casing (4), a space cavity is constituteed with casing (4) in base (1), and its internal rotation is connected with main shaft rotor (2), its characterized in that: a main air inlet nozzle (6) and a secondary air inlet nozzle (7) are sequentially arranged on the upper part of the outer side surface of the shell (4) along the circumferential direction, a main air inlet (41) communicated with the main air inlet nozzle (6) is arranged above the inner side surface of the shell (4), a secondary air inlet hole (42) communicated with the secondary air inlet nozzle (7) is arranged on the inner top surface of the shell (4), one side of the inner side surface of the shell (4) close to the main air inlet hole (41) is provided with two air outlet holes (43) which are arranged along the circumferential direction of the inner side surface of the shell (4), a shaft handle (21) at the upper end part of the main shaft rotor (2) is connected with a coupling (5), a penetrating oil inlet hole (44) is arranged on the outer side surface of the shell (4) close to the coupler (5), the lower end part rotor (22) of the main shaft rotor (2) is connected with a rotor plate (3), and two ends of the rotor plate (3) are respectively connected with a sliding block (31).

2. A two-stage induction rotary vane vacuum pump as defined in claim 1 wherein: the inner side surface of the shell (4) is designed by Pascal vortex lines, and the spindle rotor (2) and the shell (4) are eccentrically arranged.

3. A two-stage induction rotary vane vacuum pump as defined in claim 1 wherein: and a vertical groove is formed in the contact surface of the shell (4) and the upper end surface of the main shaft rotor (2), and the upper end surface of the vertical groove is communicated with an oil inlet hole (44).

4. A two-stage induction rotary vane vacuum pump as defined in claim 1 wherein: a strip-shaped groove (221) is formed in the rotor (22), and the rotary piece (3) is arranged in the strip-shaped groove (221) in a sliding mode.

5. A two-stage induction rotary vane vacuum pump as defined in claim 1 wherein: the upper side, the lower side, the left side and the right side of the rotary piece (3) are provided with grooves, two identical slots (32) which are arranged up and down are arranged in the grooves on the left side and the right side, the sliding block (31) is designed in an umbrella-shaped structure, and two identical plugs (311) which are arranged up and down are arranged at the handle end of the umbrella-shaped structure.

6. A two-stage induction rotary vane vacuum pump as claimed in claim 5 wherein: the size of the plug (311) is smaller than that of the slot (32), and the size of the handle end of the sliding block (31) is smaller than that of the grooves on the left side and the right side of the rotary piece (3).

7. A two-stage induction rotary vane vacuum pump as defined in claim 1 wherein: the air outlet channel of the air outlet hole (43) is designed to be of an L-shaped structure, the air outlet end of the air outlet channel is arranged on the upper top surface of the shell (4), the elastic sheet (8) and the blocking sheet (9) are sequentially arranged above the air outlet channel, and the blocking sheet (9) is of an arc-shaped structure with two upward ends.