CN206159022U - Novel air cooling roots vacuum pump - Google Patents

Abstract

The utility model discloses a novel air cooling roots vacuum pump belongs to vacuum pump technical field for solve the sealed problem that the effect is not good, the sealing member can't obtain sufficient lubrication of current vacuum pump. Which comprises a pump body, be equipped with the pivot in the pump body, the oil tank, the pump chamber, oil tank and pump chamber are separated through the baffle, be equipped with the pivot mounting hole on the baffle, the both ends of pivot have connected gradually the bearing, a rotor shaft, be provided with seal structure on the pivot mounting hole, seal structure establishes including the cover is changeing epaxial ceramic seal cover, the sealing ring of sheatheeing in at the ceramic seal is established to the cover, the PTFE who is located ceramic seal cover surface is sealed, the baffle that is located between baffle and the ceramic seal cover is nested, the RO of setting on the bearing is sealed, set up the recess of at least two rings shape on the ceramic seal, it has two at least sealing rings all to inlay in each recess. This technical scheme is sealed tight, and the leakproofness is good, can guarantee that bearing, sealing member use for a long time.

Description

A kind of new air-cooled roots vacuum pump

Technical field

The utility model belongs to vacuum pump technology field, specifically a kind of new air-cooled roots vacuum pump.

Background technology

In recent years, Roots vaccum pump has at home and abroad obtained developing faster, and Roots vaccum pump is widely used in smelting coal The industries such as oil, oil, chemical industry, electronics.It has to be ensured that good sealing, gear between the rotor and gear-box of Roots vaccum pump There are gear, bearing, bearing block etc. in case, gear, bearing have to be lubricated, after the complete bearing of oil lubrication, to prevent it Into in rotor, sealed using rubber lip, rubber can not be dry grinded, so cooling must be lubricated, otherwise It is easy to damage, one side sealing effectiveness is bad, causes few oil, so as to cause bearing to damage.Generally for preventing in fuel tank Oil leak to outside the pump housing, fluid and the pump housing foreign minister completely cut off in the pump housing by mechanical seal between power rotor and the pump housing Connection, mechanical seal needs lubricating oil to reduce the friction of remaining power rotor, extends its service life.Existing vacuum Pump, when quitting work, the oil in fuel tank due to gravity, positioned at tank bottoms, and the oil in fuel tank can not add it is too full, because This cannot provide lubricating oil to mechanical seal, and when starting working, lubricating oil can throw up with the rotation of power rotor, though So only have minimal amount of lubricating oil to be thrown in mechanical seal, but amount is still not enough, and if things go on like this, mechanical seal is easy to out Now damage.

In Patent No. 201520559469.9, the applying date is 2015.07.30, and patent name is Roots vacuum pump seal Disclose in the patent document (hereinafter referred to as D2) of device " Roots vacuum pump sealing apparatus, including oil jacket 9 is kept off, gear oil jacket 9 is installed On power transmission shaft 1, gear oil jacket 9 periphery is set with PTFE oil sealings 7, keeps off setting ceramics between oil jacket 9 and PTFE oil sealings 7 and applies 8, ceramic painting Layer 8 is arranged on the outer surface of gear oil jacket 9, and the outer end of PTFE oil sealings 7 arranges the oily component of gear.The oily component of gear includes oily installed in PTFE The labyrinth seal seat 5 of 7 peripheries is sealed, labyrinth seal ring 3 is provided with the outer face of labyrinth seal seat 5, labyrinth seal seat 5 is close with labyrinth Labyrinth mouth 4 is provided between seal ring 3, labyrinth seal ring 3 is arranged to inclined-plane at labyrinth mouth 4, and labyrinth seal ring 3 is arranged on power transmission shaft On 1, the periphery of labyrinth seal ring 3 is provided with the second cavity 10, disc 2 is provided with the outer face of labyrinth seal ring 3, outside disc 2 Week arranges the bottom of the first cavity 12, the first cavity 12 and the second cavity 10 the drainback passage 11 communicated with oil pocket 13. Felt 6 is set, and felt 6 is arranged on the periphery of ceramic coating 8 " at the inner face of PTFE oil sealings 7.Although disclosing by getting rid of in the patent Oil ring, the first cavity, the second cavity so that oil in fuel tank as much as possible can get rid of into the seal between rotating shaft and pump chamber it Between, its lubricity is improved, but the oil for getting rid of into still can be back in fuel tank, and can not solve to preventing oil leakage The problem of the offer of the sealing structure lubricating oil to outside the pump housing.

In Patent No. 201320059707.9, the applying date is 2013.01.30, and patent name is a kind of Roots vaccum pump In background technology in (hereinafter referred to as D3), disclose " existing Roots vaccum pump is typically all provided with fuel tank at pump chamber two ends, Motor is fixed with outside the pump housing, main shaft one end of pump is fixedly connected with through fuel tank with the main shaft of motor, is led between pump main shaft and the pump housing Fluid in crossing mechanical seal or the oil sealing isolation pump housing is connected with outside the pump housing, use between pump chamber and fuel tank screw-casing and side cover every Open, have passage to make pump chamber be connected with fuel tank above or below side cover " (see 0003 section of specification).

Utility model content

The utility model purpose is intended to provide a kind of tight, the good airproof performance of sealing, it is ensured that when bearing, seal are long Between the new air-cooled roots vacuum pump that uses.

To realize above-mentioned technical purpose, the technical solution adopted in the utility model is as follows：

A kind of new air-cooled roots vacuum pump, including the pump housing, are provided with rotating shaft, fuel tank, pump chamber, the fuel tank in the pump housing Separated by dividing plate with the pump chamber, the dividing plate is provided with rotating shaft installing hole, the two ends of the rotating shaft are connected with axle in turn Hold, armature spindle, be provided with sealing structure on the rotating shaft installing hole, the sealing structure includes the pottery being set in the rotating shaft Porcelain sealing shroud, the PTFE seal, the position that are set in the ceramic seal sealing ring for putting, outer surface is covered positioned at the ceramic seal The RO sealings that dividing plate between the dividing plate and ceramic seal set is nested, be arranged on the bearing, the pottery The groove of at least two annulars is offered on porcelain sealing shroud, is inlaid with each described groove described at least two and is sealed Ring, between the nested and described ceramic seal set of the dividing plate accommodation space is provided with, and the PTFE seal is located at described accommodating In space；One end of the armature spindle is connected with power rotor, and the end of the power rotor is provided with prevents the fuel tank from letting out Oil is to the mechanical seal outside the pump housing, the 2nd RO sealings, to the oil supply structure of the mechanical seal fuel feeding；The fuel feeding knot Structure includes snapping onto baffle plate in the fuel tank, and fuel tank is divided into the baffle plate the first fuel tank near pump chamber, away from the pump Second fuel tank in chamber, opens up jagged at the top of the baffle plate, and power rotor installing hole is offered on the baffle plate.

Using the utility model of above-mentioned technical proposal, sealed bearings are sealed first with a RO, prevent from being leaked from bearing Oil, recycles ceramic seal set, is embedded in the sealing ring of ceramic seal set groove and is connected to ceramic seal set and dividing plate is embedding The PTFE seal in accommodation space that set is formed further is sealed.Cover close by above-mentioned RO sealings, ceramic seal Envelope, seal ring seal, PTFE seal, four resealings so that the sealing of this device is more tight, relatively reliable.Oil supply structure sets Put, lubricating oil can be provided for a long term to the mechanical seal between power rotor and the pump housing, it is to avoid oil-free occur and dry grind and damage machine Tool seals and the situation of oil leak is occurred.

By one notched baffle plate of snapping in fuel tank so that fuel tank is divided into two, when vacuum pump work, first Oil in fuel tank can throw up from indentation, there to enter into the rotation of rotating shaft and store in the middle of the second fuel tank, need explanation , mechanical seal is in the middle of the second fuel tank, and what the lubricating oil being stored in the middle of the second fuel tank just can be persistently is close to machinery Envelope provides oil, and mechanical seal is damaged so that the situation of oil leak occurs so as to avoid the occurrence of oil-free dry grinding.

Further limit, the PTFE seal inner face is provided with felt.

Felt plays a part of to adsorb the dirts such as dust, chip.

The utility model seals compared to existing technology tight, good airproof performance, it is ensured that bearing, seal long-time are used.

Description of the drawings

The nonlimiting examples that the utility model can be given by accompanying drawing are further illustrated；

Fig. 1 is a kind of schematic diagram of new air-cooled roots vacuum pump of the utility model；

Fig. 2 is the enlarged drawing of A in Fig. 1；

Main element symbol description is as follows：

The pump housing 1, rotating shaft 2, fuel tank 3, the first fuel tank 31, the second fuel tank 32, pump chamber 4, dividing plate 5, bearing 6, armature spindle 7 is close Seal structure 8, ceramic seal set 81, groove 811, accommodation space 812, sealing ring 82, PTFE seal 83, dividing plate nesting 84, first RO sealings 85, power rotor 9, mechanical seal 91, the 2nd RO sealings 92, baffle plate 931.

Specific embodiment

In order that those skilled in the art may be better understood the utility model, it is right with reference to the accompanying drawings and examples Technical solutions of the utility model are further illustrated.

As shown in Figure 1 and Figure 2, it is provided with rotating shaft 2, fuel tank in a kind of new air-cooled roots vacuum pump, including the pump housing 1, the pump housing 1 3rd, pump chamber 4, fuel tank 3 and pump chamber 4 are separated by dividing plate 5, and dividing plate 5 is provided with rotating shaft installing hole, and the two ends of rotating shaft 2 are sequentially connected There are bearing 6, armature spindle 7, sealing structure 8 is provided with rotating shaft installing hole, sealing structure 8 includes the ceramics being set in rotating shaft 2 Sealing shroud 81, the sealing ring 82 being set on ceramic seal set 81, the PTFE seal 83, position that 81 outer surfaces are covered positioned at ceramic seal In dividing plate 5 and ceramic seal set 81 between dividing plate nesting 84, be arranged on bearing 6 a RO sealing 85, ceramic seal set The groove 811 of at least two annulars is offered on 81, at least two sealing rings 82, dividing plate are inlaid with each groove 811 An accommodation space 812 is provided between nested 84 and ceramic seal set 81, PTFE seal 83 is located in accommodation space 812；Rotor One end of axle 7 is connected with power rotor 9, and the end of power rotor 9 is provided with the machinery prevented outside the draining of fuel tank 3 to the pump housing 1 Sealing the 91, the 2nd RO sealing 92, to the oil supply structure of the fuel feeding of mechanical seal 91.

Oil supply structure includes snapping onto the baffle plate 931 in fuel tank 3, and 3 points by fuel tank of baffle plate 931 is near the first of pump chamber 4 Fuel tank 31, away from the second fuel tank 32 of pump chamber 4, the top of baffle plate 931 opens up jagged, on baffle plate 931 power rotor is offered Installing hole.

The inner face of PTFE seal 83 is provided with felt.

Specifically, the oil filler point of fuel tank 3 is arranged on the first fuel tank 31, is refueled by oil filler point oil dropping apparatus 3, and oil is stored in In the middle of first fuel tank 31, when vavuum pump starts running, oil is thrown up, and by breach storage in the middle of the second fuel tank 32 is entered into Get up, the oil for storing can provide lubricating oil to mechanical seal 91 for a long time, it is ensured that the service life of mechanical seal 91.Set simultaneously Put the 2nd RO in the end of power rotor 9 and seal 92, can further prevent the leakage of lubricating oil.

A kind of new air-cooled roots vacuum pump that the utility model is provided is described in detail above.Specific embodiment Explanation be only intended to help and understand method of the present utility model and its core concept.It should be pointed out that for the art For those of ordinary skill, on the premise of without departing from the utility model principle, some changing can also be carried out to the utility model Enter and modify, these are improved and modification is also fallen in the utility model scope of the claims.

Claims (2)

1. a kind of new air-cooled roots vacuum pump, including the pump housing, is provided with rotating shaft, fuel tank, pump chamber in the pump housing, the fuel tank and The pump chamber is separated by dividing plate, and the dividing plate is provided with the rotating shaft installing hole of rotating shaft, and the two ends of the rotating shaft are sequentially connected There are bearing, armature spindle, it is characterised in that sealing structure is provided with the rotating shaft installing hole, the sealing structure includes being arranged It is ceramic seal set in the rotating shaft, the sealing ring being set on the ceramic seal set, outer positioned at ceramic seal set The PTFE seal on surface, the dividing plate between the dividing plate and ceramic seal set is nested, be arranged on the bearing First RO is sealed, and the ceramic seal puts the groove for offering at least two annulars, is inlaid with each described groove Sealing ring described at least two, between the nested and described ceramic seal set of the dividing plate accommodation space, the PTFE are provided with Sealing is located in the accommodation space；One end of the armature spindle is connected with power rotor, and the end of the power rotor is arranged Have prevent mechanical seal outside the fuel tank draining to the pump housing, the 2nd RO sealings, to the confession of the mechanical seal fuel feeding Oily structure；

The oil supply structure includes snapping onto baffle plate in the fuel tank, and the baffle plate is divided into fuel tank near the first oily of pump chamber Case, away from the second fuel tank of the pump chamber, open up jagged at the top of the baffle plate, offer on the baffle plate power rotor peace Dress hole.

2. a kind of new air-cooled roots vacuum pump according to claim 1, it is characterised in that：The PTFE seal inner face It is provided with felt.