CN206845466U - A kind of Roots vaccum pump - Google Patents

Abstract

The utility model discloses a kind of Roots vaccum pump, its drip irrigation device is：Including the pump housing, the electric machine assembly of pump housing side is installed on, main accumulator, driving shaft, driven shaft are provided with the pump housing, the main accumulator is located at close to electric machine assembly side, it is characterized in that：The driving shaft shaft end is provided with driving gear, the driven shaft shaft end is provided with driven gear, both driving gear and driven gear are intermeshed and are respectively positioned in main accumulator, the electric machine assembly includes motor power output shaft, flabellum, the motor power output shaft is connected with driving shaft close to the end of driving gear, and flabellum, which is used to dry to the pump housing close to the lateral wall of main accumulator, to radiate；The Roots vaccum pump possess extremely low oil spill rate, clean environment firendly, simple in construction, easy to maintenance, security is good, good operation stability, price economy, air-cooled water cooling compatibility, service life length, stability in use height, the advantage of anticorrosion etc..

Description

A kind of Roots vaccum pump

Technical field

Vavuum pump is the utility model is related to, more particularly to a kind of Roots vaccum pump.

Background technology

Traditional Roots vacuum pump configuration, such as the Chinese utility model patent that notification number is CN203098284U, it includes The pump housing and the fixed motor being located on the pump housing, the pump housing is interior to be provided with driving shaft and driven shaft, one end of driving shaft and moving for motor Power end is connected, and the other end is provided with driving gear, and the end of driven shaft is then provided with driven gear, and storage is additionally provided with the pump housing Grease chamber, accumulator are located at close to motor side；The driving force of motor is conducted to driving gear by driving shaft, driving gear with from Moving gear is meshed, and driven gear drives driven shaft to rotate, then gradual vacuum pumping state, and in accumulator inside pump chamber Also can gradual vacuum pumping state, pressure in accumulator with pump chamber change in pressure.

Fluid in accumulator can also have more heat transfer in addition to corresponding component is lubricated effect in fluid, if Radiate not in time, the greasy property of fluid can be directly affected, and closely influence Roots vaccum pump whole service life, and traditional Roots vaccum pump larger radiating defect be present.

Utility model content

In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of Roots vaccum pump, it has Stronger heat-sinking capability.

Above-mentioned technical purpose of the present utility model technical scheme is that：A kind of Roots vaccum pump, Including the pump housing, the electric machine assembly of pump housing side is installed on, main accumulator, driving shaft, driven shaft, the master are provided with the pump housing Accumulator is located at is provided with driving gear close to electric machine assembly side, the driving shaft shaft end, and the driven shaft shaft end is provided with Driven gear, both driving gear and driven gear are intermeshed and are respectively positioned in main accumulator, and the electric machine assembly includes electricity Power output shaft, flabellum, the motor power output shaft are connected with driving shaft close to the end of driving gear, flabellum be used for pair The pump housing is dried close to the lateral wall of main accumulator to radiate.

Pass through above-mentioned technical proposal, motor power output shaft rotate in a circumferential direction, the rotary power of motor power output shaft Can be transferred to driving shaft, the driving gear on driving shaft can be meshed with the driven gear on driven shaft, and then make driving shaft with Synchronous rotary occurs between the two for driven shaft；

During traditional structural design, driving gear is respectively positioned on away from electric machine assembly side, due to master with driven gear Moving axis and driven shaft entire length are longer, and even with steel part, under larger load, its own can also produce certain Windup-degree, and it is directed to that the back lash inside lobe pump body is smaller, the power of motor power output shaft transmits successively first It is poor by driving shaft, driving gear, driven gear, driven shaft, its inflation performance；Analyzed from structure, driving gear It is distributed in close to electric machine assembly side, the i.e. meshing point of driving gear and driven gear and is located at close to motor with driven gear Component side, the sync rates that it is engaged are higher, and running stability gets a promotion, and inflation performance is preferable；

From radiating angle analysis, because driving gear and driven gear are respectively positioned in main accumulator, can be filled in main accumulator The fluid entered, while driving gear rotates with driven gear, fluid can be thrown to main storage by driving gear and driven gear In the chamber wall of grease chamber, the fluid with higher temperature can be uniformly attached on the locular wall of main accumulator, meeting the problem of in fluid On very fast conduction to the locular wall of main accumulator, the flabellum under rotation status, the wind-force of blowout can directly act on main accumulator Outer chamber walls, and then quick heat radiating is carried out to main accumulator outer chamber walls, so as to have the function that quickly to reduce vavuum pump internal temperature； In addition, the transmission stability between driving shaft and driven shaft is higher, caused heat will be fewer.

Preferably, the pump housing includes being used for the side cover that is played a supportive role to driving shaft and driven shaft, on the side cover Provided with radiating cavity, thermal vias, the radiating cavity is communicated by thermal vias with external environment.

Pass through above-mentioned technical proposal, in pump housing running, pump body needs to carry out air compression, and pump body is just More heat can be produced, the heat can be conducted to the fluid inside main accumulator by side cover, and then can cause main accumulator Interior seal produces failure because of temperature, and the setting radiating cavity on side cover, the heat of pump body is in conduction to the sky that radiates During chamber, heat can be conducted to the air of radiating cavity inside, and the air with heat can pass through thermal vias and the external world Air among environment carries out convective exchange, is conducted so as to which heat be greatly reduced to the fluid of main accumulator.

Preferably, in addition to external water pump, the external water pump inject cooling water by thermal vias to radiating cavity.

Pass through above-mentioned technical proposal, external water pump can be situated between directly to injecting cooling water in thermal vias by air before Matter is converted to aqueous medium, better heat-radiation effect.

Preferably, in addition to external dry gas source, the side cover are provided with the support passed through for driving shaft with driven shaft Axis hole, the supporting shaft hole hole wall be provided with rolling bearing, aeration tank, sealing ring external member, the sealing ring external member, aeration tank, Rolling bearing is arranged in order toward close to main accumulator side, and the external dry gas source in aeration tank to being filled with dry gas.

Once Pass through above-mentioned technical proposal, Roots vaccum pump carry chemistry applied among chemical industry among its air Component gas, side cover can apply away from the side component of main accumulator and spread corrosion-inhibiting coating, to resist the gas for carrying chemical composition Corrode, can be immersed in positioned at component of the side cover close to main accumulator side among fluid, and the class component will not then smear anti-corrosion Coating, now, dry gas is filled with aeration tank, and then to producing gas shield between rolling bearing and sealing ring external member, The chemical gas that sealing ring external member side is greatly reduced enters main accumulator, reaches protection positioned at parts in main accumulator Effect, because its dry gas internal moisture content is few, the aitiogenic probability between chemical composition gas can be reduced, And even if the gas dried is entered in main accumulator, the service life of intraware will not also be had an impact；Further, since It is that dry gas is filled with aeration tank using external dry gas source, can produces flowing inside dry gas, part can be taken away Temperature inside vavuum pump, plays cooling-down effect.

Preferably, the quantity of the side cover is two, and two side covers are located at the both ends of driving shaft or driven shaft respectively, often Individual sealing ring external member uses magnetic mechanical seal part.

Pass through above-mentioned technical proposal, can form ideal vacuum environment between two side covers, and side cover and main storage At the leakage point being most also easy to produce between grease chamber, secondary accumulator is where sealing ring external member, and sealing ring external member uses magnetic force machine Tool seal, the sealing effectiveness retention time of magnetic mechanical seal part is longer, can improve the vacuum cleaning degree between two side covers.

Preferably, the driving shaft is installed close to the end of driving gear and/or driven shaft close to the end of driven gear There is first to get rid of oiled-plate method.

Pass through above-mentioned technical proposal, when driving shaft and driven shaft rotate in a circumferential direction, first, which gets rid of oiled-plate method, can also follow Rotate, first, which gets rid of oiled-plate method, still can play and be thrown to the fluid in main accumulator in the chamber wall of main accumulator, can be effective The splashing effects of main accumulator inner fluid are lifted, within the unit interval, fluid and the exposure of main accumulator chamber wall are had Effect lifting, ultimately help to lift the radiating effect of fluid.

Preferably, in addition to secondary accumulator, the secondary accumulator are located at the side that the pump housing deviates from electric machine assembly, the active Axle is provided with second away from the end of driven gear away from the end of driving gear and/or driven shaft and gets rid of oiled-plate method, and described second gets rid of Oiled-plate method is located in secondary accumulator.

Pass through above-mentioned technical proposal, due to can also inject fluid in secondary accumulator, the rotation of driving shaft and driven shaft, also can Drive and second get rid of rotating in a circumferential direction for oiled-plate method, and then the fluid in secondary accumulator is more attached at the chamber wall of secondary accumulator, So as to lift the fluid radiating effect in secondary accumulator.

Preferably, it is connected between the motor power output shaft and driving shaft by shaft coupling, the shaft coupling is positioned at master In accumulator.

Inherently there is certain space in Pass through above-mentioned technical proposal, first, main accumulator internal cavities, shaft coupling is set In the intrinsic space that in main accumulator, reasonably make use of main accumulator, reduce the overall space-consuming of vavuum pump；Secondly, Traditional Roots vaccum pump needs to set longer driving shaft with through the side wall of main accumulator, then passes through shaft coupling and motor Power output shaft is connected, and the transmission distance between electric machine assembly and driving shaft is longer, and degree of operating steadily is relatively low, conversely, using upper State structure Roots vaccum pump, the distance between electric machine assembly and driving shaft are effectively shortened, and degree of operating steadily obtains significantly Lifting.

Preferably, the electric machine assembly also includes motor flange, and the electric machine assembly is connected to the pump housing by motor flange On, the axle through hole that power supply power output shaft passes through, the outer peripheral wall of the motor power output shaft are set on the motor flange Seal assembly is provided between the hole wall of axle through hole.

Pass through above-mentioned technical proposal, due to shaft coupling is arranged inside main accumulator, whole electric machine assembly can be direct It is installed on pump housing lateral wall, motor flange belongs to a portion in electric machine assembly, axle through hole hole wall and motor in itself The seal assembly set between power output shaft, it can guarantee that the sealing between electric machine assembly inside main accumulator；And even if When seal assembly is in failure state, because under real use state, main accumulator is in vacuum state, it may appear that outside gas Body enters the situation of main accumulator by axle through hole, and the fluid inside main accumulator will not be leaked into external environment, finally Have the function that clean environment firendly.

Preferably, the seal assembly uses magnetic mechanical seal part.

Pass through above-mentioned technical proposal, using magnetic mechanical seal part between motor power output shaft and axle through hole, Without additionally carrying out repairing to magnetic mechanical seal part, itself can reach axle portion sealing effectiveness, even if magnetic mechanical seal part Failure conditions are produced, are in vacuum state inside the main accumulator in Roots vaccum pump, now, extraneous air can pass through The invalid position of magnetic mechanical seal part is drawn into main accumulator, and the fluid in main accumulator just will not be close from magnetic machinery The invalid position of sealing is flowed among external environment condition, has the function that anti-leak, clean environment firendly；In addition, magnetic mechanical seal part It is the mechanical seal that elastic force redeeming is replaced with magnetic force, for traditional mechanical seal, the guarantor of its sealing effectiveness Hold that the time is longer, can help to be lifted the whole service life of Roots vaccum pump, the magnetic mechanical seal part small volume of itself, Help to reduce vavuum pump own vol.

In summary, the utility model having the beneficial effect that in contrast to prior art：The Roots vaccum pump possesses oil spill rate Extremely low, clean environment firendly, simple in construction, easy to maintenance, security is good, good operation stability, price economy, air-cooled water cooling are compatible, The advantage of service life length, stability in use height, anticorrosion etc..

Brief description of the drawings

Fig. 1 is the structural representation of embodiment, for showing the general internal structure of embodiment；

Fig. 2 is Fig. 1 A portions enlarged drawing.

Reference：1st, main accumulator；2nd, driving shaft；3rd, driven shaft；4th, driving gear；5th, driven gear；6th, group of motors Part；61st, motor power output shaft；62nd, flabellum；63rd, motor flange；7th, the pump housing；71st, side cover；8th, radiate cavity；9th, radiating is logical Hole；10th, external water pump；11st, external dry gas source；12nd, supporting shaft hole；13rd, rolling bearing；14th, aeration tank；15th, sealing ring External member；16th, first oiled-plate method is got rid of；17th, secondary accumulator；18th, second oiled-plate method is got rid of；19th, shaft coupling；20th, axle through hole；21st, sealing group Part；22nd, vacuum compression area.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

A kind of Roots vaccum pump, referring to shown in Fig. 1 and Fig. 2, mainly include the pump housing 7 and electric machine assembly 6, the pump housing 7 Inside is provided with two pieces in left-right situs and the side covers 71 that be arranged in parallel each other, two pieces of side covers 71 by inside the whole pump housing 7 from a left side Secondary accumulator 17, vacuum compression area 22, main accumulator 1 are separated into successively to the right side, can be noted in secondary accumulator 17 and main accumulator 1 Enter fluid, two supporting shaft hole 12 be equipped with each side cover 71, driving shaft 2 and driven shaft 3 are provided with the pump housing 7, It is set in parallel between driving shaft 2 and driven shaft 3, two ends of driving shaft 2 and driven shaft 3 are both passed through on two pieces of side covers 71 Corresponding supporting shaft hole 12 is simultaneously set up between two pieces of side covers 71, driving shaft 2 with two ends of driven shaft 3 are corresponding is located at main storage In grease chamber 1 and secondary accumulator 17, electric machine assembly 6 then includes motor flange 63, motor power output shaft 61, flabellum 62, entirely Electric machine assembly 6 is connected to the right side of the pump housing 7 by motor flange 63, and the one end of motor power output shaft 61 is through the pump housing 7 and prolongs Extending in main accumulator 1, the other end is then connected with flabellum 62, is connected between driving shaft 2 and driven shaft 3 by transmission component 23, To realize the synchronous rotary between driving shaft 2 and driven shaft 3, the transmission component 23 includes driving gear 4 and driven gear 5, driving gear 4 is installed on driving shaft 2 close to the end of electric machine assembly 6, and driven gear 5 is installed on driven shaft 3 close to group of motors The end of part 6, driving gear 4 are intermeshed inside main accumulator 1 with driven gear 5, and motor power output shaft 61 then passes through Shaft coupling 19 is connected with driving shaft 2, and quincunx shaft coupling 19 can be selected in the shaft coupling 19；Start electric machine assembly 6, motor power is defeated Shaft 61 rotates, and one end drives driving shaft 2 to rotate by shaft coupling 19, and driving gear 4 is mutually nibbled with driven gear 5 Close, and synchronous drive driven shaft 3 rotates, the rotation of driving gear 4 and driven gear 5 can make fluid splash to main accumulator In 1 chamber wall, the temperature of this part fluid can be directly conducted in the chamber wall of main accumulator 1, at the same time, motor power The other end of output shaft 61 also can drive flabellum 62 to rotate, and the wind that flabellum 62 is fanned out to can blow to the outer chamber walls of main accumulator 1, with The temperature of the main outer chamber walls of accumulator 1 is quickly reduced, finally to cool to the fluid in main accumulator 1.

Shown in Figure 1, the shaft coupling 19 between motor power output shaft 61 and driving shaft 2 is located in main accumulator 1, with The overall length of Roots vaccum pump is greatly reduced；Motor flange 63 realizes the company between the pump housing 7 by some fastening bolts Connect, and motor flange 63 is provided with axle through hole 20, motor power output shaft 61 passes through axle through hole 20, motor power output shaft Seal assembly 21 is provided between 61 outer peripheral wall and the hole wall of axle through hole 20, magnetic mechanical seal can be selected in the seal assembly 21 Part, sealing effectiveness and sealing life between lifting motor power output shaft 61 and axle through hole 20.

It is shown in Figure 1, oiled-plate method 16 is got rid of provided with first close to the end of main accumulator 1 in driving shaft 2, certainly, driven Axle 3 may also set up first close to the end of main accumulator 1 and get rid of oiled-plate method 16, and all first, which gets rid of oiled-plate method 16, is respectively positioned on main accumulator 1 Interior, to lift the splashing amount of the main inner fluid of accumulator 1, the first global shape for getting rid of oiled-plate method 16 is disc, and is connected by bolt The end of driving shaft 2 or the end of driven shaft 3 are connected to, the first middle part for getting rid of oiled-plate method 16 is located at the axial line of driving shaft 2 or driven shaft 3 On；Oiled-plate method 18 is got rid of provided with second close to the end of secondary accumulator 17 in driving shaft 2, certainly, in driving shaft 2 close to secondary accumulator 17 End also can get rid of oiled-plate method 18 provided with second, all second, which gets rid of oiled-plate method 18, is respectively positioned in secondary accumulator 17, to lift secondary oil storage The splashing amount of the inner fluid of room 17；Second global shape for getting rid of oiled-plate method 18 is disc, and is bolted to the end of driving shaft 2 Or the end of driven shaft 3, the second middle part for getting rid of oiled-plate method 18 are located on the axial line of driving shaft 2 or driven shaft 3.

Referring to shown in Fig. 1 and Fig. 2, from left to right it is disposed with the hole wall of the supporting shaft hole 12 in side cover 71 close Seal ring external member 15, aeration tank 14, rolling bearing 13, wherein, magnetic mechanical seal part can be selected in sealing ring external member 15, true to be lifted Empty compressional zone 22 and main accumulator 1, the tightness of secondary accumulator 17 between the two, in general, set altogether in two side covers 71 Supporting shaft hole 12 everywhere are equipped with, reach four dot encapsulation effects, prevent main accumulator 1, vacuum compression area 22, the three of secondary accumulator 17 Between cross pollution, and the inside oil consumption of vavuum pump can be reduced；In the outside of the pump housing 7, external dry gas source 11 can be also set, External dry gas source 11 is filled with dry gas into aeration tank 14 with being communicated inside aeration tank 14, and dry gas can be selected Nitrogen, nitrogen itself quite stable, it is not easy that chemical change occurs with material, and itself has drying effect, thinking reduction, this is dry The probability that pathogenic dryness body reacts with other gases；When applying to special chemical industry occasion, the gas inside its occasion is easy When being reacted with remaining gas, the gas inside the external dry gas source 11 then needs to select inert gas, and inert gas can From helium, neon, argon gas, Krypton, xenon one or more therein, inert gas is avoided that to be occurred instead with chemical gas Should.

Referring to radiating cavity 8 everywhere shown in Fig. 1 and Fig. 2, is provided with altogether on the pump housing 7, the cavity 8 that radiates everywhere is homogeneous One corresponds to supporting shaft hole 12 everywhere, and each cavity 8 that radiates is distributed in the side that aeration tank 14 deviates from driving shaft 2, the radiating Thermal vias 9 is communicated between cavity 8 and external environment, the gas with temperature inside the cavity 8 that radiates passes through thermal vias 9 Distribute to external environment, to accelerate the purpose of the radiating efficiency of the pump housing 7.

Applying working condition：

Start electric machine assembly 6, motor power output shaft 61 rotates, and the one end of motor power output shaft 61 drives flabellum 62 Rotation, the wind that flabellum 62 is fanned out to can directly blow to the outer chamber walls of main accumulator 1；The rotation of the other end of motor power output shaft 61 is moved Power can be transferred to driving shaft 2, and driving gear 4 on driving shaft 2, first get rid of oiled-plate method 16, second get rid of oiled-plate method 18 week can occur To rotation, the fluid in main accumulator 1 can be thrown to the interior room of main accumulator 1 by driving gear 4 and the first rotation for getting rid of oiled-plate method 16 On wall, the fluid in secondary accumulator 17 can be thrown in the chamber wall of secondary accumulator 17 by the second rotation for getting rid of oiled-plate method 18；It is same with this When, synchro-meshing occurs for driving gear 4 and driven gear 5, and driven gear 5, driven shaft 3, first get rid of oiled-plate method 16, second get rid of oiled-plate method 18 can be rotated in a circumferential direction, and the fluid in main accumulator 1 can be thrown to main storage by driven gear 5 and the first rotation for getting rid of oiled-plate method 16 In the chamber wall of grease chamber 1, the fluid in secondary accumulator 17 can be thrown to the interior room of secondary accumulator 17 by the second rotation for getting rid of oiled-plate method 18 On wall；

During driving shaft 2 and driven shaft 3 are rotating, external dry gas source 11 constantly can fill dry gas Enter into aeration tank 14, the compressed gas in vacuum compression area 22 by sealing ring external member 15, dry gas multiple stop, very It is difficult to get access to arrive in main accumulator 1 and secondary accumulator 17.

Extra, referring to shown in Fig. 1 and Fig. 2, external water pump 10, the external energy of water pump 10 are also provided with the outside of the pump housing 7 The water of inside is entered in radiating cavity 8 by thermal vias 9, cooling water can be directly injected into logical to radiating by external water pump 10 It is cold with water cooling replacement air in hole 9, better heat-radiation effect.

Described above is only exemplary embodiment of the present utility model, not for limitation protection model of the present utility model Enclose, the scope of protection of the utility model is determined by appended claim.

Claims (10)

1. a kind of Roots vaccum pump, including the pump housing (7), the electric machine assembly (6) for being installed on the pump housing (7) side, the pump housing (7) is interior Provided with main accumulator (1), driving shaft (2), driven shaft (3), the main accumulator (1) is located at close to electric machine assembly (6) side, its It is characterized in：Driving shaft (2) shaft end is provided with driving gear (4), and driven shaft (3) shaft end is provided with driven gear (5), Both driving gear (4) and driven gear (5) are intermeshed and are respectively positioned in main accumulator (1), and the electric machine assembly (6) includes Motor power output shaft (61), flabellum (62), the motor power output shaft (61) is with driving shaft (2) close to driving gear (4) End be connected, flabellum (62) be used for the pump housing (7) close to main accumulator (1) lateral wall dry radiating.

2. a kind of Roots vaccum pump according to claim 1, it is characterized in that：The pump housing (7) includes being used for driving shaft (2) and the side cover (71) that plays a supportive role of driven shaft (3), the side cover (71) are provided with radiating cavity (8), thermal vias (9), the radiating cavity (8) is communicated by thermal vias (9) with external environment.

3. a kind of Roots vaccum pump according to claim 2, it is characterized in that：Also include external water pump (10), it is described external Water pump (10) injects cooling water by thermal vias (9) to radiating cavity (8).

4. a kind of Roots vaccum pump according to Claims 2 or 3, it is characterized in that：Also include external dry gas source (11), The side cover (71) is provided with the supporting shaft hole (12) passed through for driving shaft (2) with driven shaft (3), supporting shaft hole (12) hole Wall be provided with rolling bearing (13), aeration tank (14), sealing ring external member (15), the sealing ring external member (15), aeration tank (14), Rolling bearing (13) is arranged in order toward close to main accumulator (1) side, and the external dry gas source (11) is to aeration tank (14) Inside it is filled with dry gas.

5. a kind of Roots vaccum pump according to claim 4, it is characterized in that：The quantity of the side cover (71) is two, and Two side covers (71) use magnetic force machine positioned at the both ends of driving shaft (2) or driven shaft (3), each sealing ring external member (15) respectively Tool seal.

6. a kind of Roots vaccum pump according to claim 1, it is characterized in that：The driving shaft (2) is close to driving gear (4) End and/or driven shaft (3) be provided with first close to the end of driven gear (5) and get rid of oiled-plate method (16).

7. a kind of Roots vaccum pump according to claim 1 or 6, it is characterized in that：Also include secondary accumulator (17), the pair Accumulator (17) is located at the side that the pump housing (7) deviates from electric machine assembly (6), and the driving shaft (2) deviates from the end of driving gear (4) And/or driven shaft (3) is provided with second away from the end of driven gear (5) and gets rid of oiled-plate method (18), described second gets rid of oiled-plate method (18) position In secondary accumulator (17).

8. a kind of Roots vaccum pump according to claim 1, it is characterized in that：The motor power output shaft (61) and active It is connected between axle (2) by shaft coupling (19), the shaft coupling (19) is located in main accumulator (1).

9. a kind of Roots vaccum pump according to claim 8, it is characterized in that：The electric machine assembly (6) also includes motor method Blue (63), the electric machine assembly (6) are connected on the pump housing (7) by motor flange (63), and confession is set on the motor flange (63) The axle through hole (20) that motor power output shaft (61) passes through, outer peripheral wall and the axle through hole of the motor power output shaft (61) (20) seal assembly (21) is provided between hole wall.

10. a kind of Roots vaccum pump according to claim 9, it is characterized in that：The seal assembly (21) uses magnetic force machine Tool seal.