CN101871454A

CN101871454A - Vertical rotating sheet type vacuum pump

Info

Publication number: CN101871454A
Application number: CN200910049809A
Authority: CN
Inventors: 孙中旭; 刘斌; 王传锦
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-23
Filing date: 2009-04-23
Publication date: 2010-10-27

Abstract

The invention relates to a vertical rotating sheet type vacuum pump, which comprises a pump body and an electric motor, wherein the electric motor is arranged at the upper part of the pump body, the electric motor is connected with a rotor through a belt, one side of the pump body is provided with an air inlet pipeline, the other side of the pump body is provided with an oil tank, the upper part of the oil tank is provided with an oil spraying prevention device, the lower part of the oil tank is provided with a sump oil separation tank, and a filtering screen plate is arranged in the sump oil separation tank. The invention has the advantages of small area of the occupied ground, light weight of the pump body per se, great reduction of the electric motor load because the rotor tangent point is designed at the lower end in the pump body, convenient cleaning of sump oil and particle impurities and the like, and is applicable to the fields of various kinds of medicine, vacuum drying, film plating, film coating, chemical engineering, light industry, petroleum, metallurgy and the like.

Description

A kind of vertical rotating sheet type vacuum pump

Technical field

The present invention relates to a kind of vacuum pump, belong to the jet pump field, the fluid that relates in particular in the device is because of other fluid-flow rate produce the field of vacuum that pressure drop causes, more specifically is a kind of oil seal type oil-sealed rotary pump.

Background technique

Vacuum pump is one of basic equipment that seal container is extracted gas, is widely used at present in the industry-by-industries such as medicine, vacuum drying, plated film, overlay film, chemical industry, light industry, oil metallurgy.In pumped vacuum systems, vacuum pump can use separately, also can link together with the ultrahigh vacuum pump of molecular pump, suction booster, diffusion pump etc. and use as fore pump.

Vacuum pump can extract the dry gas in the seal container, if with the gas ballasting device, can also extract a certain amount of condensable gas.To contain oxygen too high but it is unsuitable for extracting, mordant to metal, can chemical reaction and the gas that contains particle dust to pump oil.

Vacuum pump also is one of pumping equipment the most basic in the vacuum technique.Vacuum pump mostly is middle-size and small-size pump.Vacuum pump has two kinds of single-stage and twin-stages.So-called twin-stage is exactly structurally two single-stage pumps to be together in series.The general twin-stage of making to obtain higher degree of vacuum more.

The pumping speed of vacuum pump is as follows with the relation regulation of inlet pressure: at inlet pressure is 1333Pa, 1.33Pa and 1.33 * 10 ^-1(Pa) under, its pumping speed value must not be lower than respectively pump nominal pumping speed 95%, 50% and 20%.

And present widely used single-stage sliding vane rotary pump is a kind of of vacuum pump, concrete structure as shown in Figure 1, the sliding vane rotary pump of the type mainly is made up of parts such as stator, rotor, blade, Ding Gai, springs.Its structure be utilize the rotor (the tangent gap between the two of the cylindrical of rotor and inner surface of stator is very little) that is contained in prejudicially in the stator cavity and the interior slip of rotor be close to two blades of stator inner wall by spring tension and centrifugal force, when rotor rotated, the inwall along stator slided all the time.

As shown in Figure 2, be another kind of twin-stage rotary-vane vaccum pump, the type is the improved type of existing single-stage rotary-vane vaccum pump, the twin-stage rotary-vane vaccum pump is made up of two working rooms, series connection before and after two Room, constant speed rotation in the same way, the I chamber is the rough vacuum level, the II chamber is the high vacuum level, pumped gas enters the II chamber by suction port, and when the gas pressure that enters was higher, gas contracted through the II constant pressure, pressure increases rapidly, compressed gas is not only discharged from senior outlet valve, and through the mesospore passage, enters the I chamber, be compressed in the I chamber, discharge from rudimentary outlet valve; When the gas pressure that enters the II chamber is low, though, also push away not open senior outlet valve and discharge through the compression of II chamber, gas all enters the I chamber through the mesospore passage, continuation compression through the I chamber discharged by rudimentary outlet valve, so the twin-stage rotary-vane vaccum pump is than the limiting vacuum height of single-stage rotary-vane vaccum pump.

As shown in Figure 3, above-mentioned single-stage rotary-vane vaccum pump and twin-stage rotary-vane vaccum pump, because the problem on the structural design generally is horizontal, motor and vacuum pump are set in parallel on the frame, connect with belt each other, cause that floor space is big, volume is big, motor power (output) is big, the pump oil consumption more easily to environment pollute, production process is numerous and diverse and start quite inconvenience, concrete defective is as follows:

1. single-stage rotary-vane vaccum pump or twin-stage rotary-vane vaccum pump are wasted resource, befouling environment.

Because more which floor oil baffle the vacuum pump under the prior art adorned, thereby enlarged the volume of the fuel tank and the pump housing for preventing oil spout in fuel tank.But because the more pump oil that makes of level of oil baffle has produced multiple impact in exhaust process, make oil droplet become very light mist of oil with gaseous emission in atmosphere, more then extracted the increase of atmosphere time as taking out container, make mist of oil after relief opening builds up to specified temp, become oil droplet again, with the gas ejection, form oil spout.Not only caused oily waste and non-easy cleaning, and severe contamination around working environment.

2. the fuel tank of single-stage rotary-vane vaccum pump or twin-stage rotary-vane vaccum pump is huge, not only quality is heavy for the pump housing, and has brought many difficulties to production and processing, mainly shows to be difficult to control machining accuracy, can't produce in batches, wastes multiple resource.Because covered by fuel tank the peripheral most of of the pump housing, heat dispersion is relatively poor thereby must take water-cooling pattern, this has wasted water resources largely.

3. the motor of single-stage rotary-vane vaccum pump or twin-stage rotary sheet type and vacuum pump are set in parallel on the frame, connect with belt each other, can produce radially vibrations during startup, motor power (output) is big more, the vibrations that produce are also big more, not only can cause the skew of vacuum pump itself, and noise pollution is serious.

4. as Fig. 1 and shown in Figure 3, existing single-stage rotary-vane vaccum pump or twin-stage rotary-vane vaccum pump have only the floor space of increasing just can make the pump steady running because its point of contact in the top of the pump housing, causes the top of whole pump too heavy, and the below is lighter.And limit because of structure, require the fuel tank must be above the point of contact, so when stopping using, pump oil can slowly backflow to pump chamber, rests on the space of rotor lower end.When restarting, owing to liquid can't be compressed, thereby can not in time get rid of the load that has increased the weight of motor again, Given this, have only the increasing motor power (output), just can make pump startup, greatly wasted electric energy, efficient is not high.

Along with the application of sliding vane rotary pump is widened day by day, its number of applications constantly increases.For the volume that dwindles pump, alleviate the weight of pump, reduce energy consumption, prevent that requirement such as pump oil pollution environment from having become the instant responsibility of technician already.So now press for and a kind ofly can prevent oil spout and easy cleaning, floor space is little, volume is little, and induction-motor load is little but still can keep the vacuum pump of original production capacity.

Summary of the invention

In order to address the above problem, the invention provides a kind of vertical rotating sheet type vacuum pump, by having designed anti-oil spout device, and adjusted the setting of the motor and the pump housing, change technological means such as point of contact and solved the problems referred to above.

Vertical rotating sheet type vacuum pump concrete structure of the present invention is as described below:

A kind of vertical rotating sheet type vacuum pump comprises the pump housing and motor, it is characterized in that:

Described motor is arranged on the top of the pump housing and is connected with rotor with belt;

Motor is arranged on the top of the pump housing and uses belt to be connected with rotor, this kind of drive vertically, thus utilize earth attraction to reduce pump housing vibration, and saved floor space greatly.

The fulcrum of the rotor that is provided with in the described pump housing is positioned at the below of the central point of the pump housing, and the point of contact of rotor is the contacting point of pump housing internal surface bottom and rotor outer rim;

The present invention has done new improvement aspect the point of contact, with the point of contact change into of pump housing below vertical ± 30 ℃ between, induction-motor load is reduced greatly, also reduced the consumption of the energy when having improved efficient, and because the variation at point of contact makes center of gravity be in whole vacuum pump bottom, stability better.

The described pump housing one side is provided with admission line, and opposite side is provided with fuel tank, is provided with anti-oil spout device on the top of this fuel tank.

According to a kind of vertical rotating sheet type vacuum pump of the present invention, it is characterized in that, described anti-oil spout device comprises exhaust cap, mist of oil absorption net, mist of oil collection device, oil gas targeting port and return opening, it is cylindrical tank shape structure that mist of oil is collected device, wherein exhaust cap is arranged on the top that mist of oil is collected device, mist of oil absorption net is arranged on mist of oil and collects on the inwall of device, the oil gas targeting port be arranged on mist of oil collect device the tank body outside a side and is connected with the top of fuel tank, return opening is arranged on the bottom of mist of oil collection device and is connected with fuel tank internal by return tube.

The anti-oil spout device of redesign, make aspect the anti-oil spout significant improvement having been arranged, do not re-use oil baffle plate, thereby dwindled the volume of the fuel tank and the pump housing, alleviated the quality of pump, the below that return opening is arranged on anti-oil spout device makes oil return fuel tank along return tube.

According to a kind of vertical rotating sheet type vacuum pump of the present invention, it is characterized in that the bottom of described fuel tank is provided with and the sump oil separating vessel of preventing that the oil spout matched with devices is used.

At the sump oil separating vessel that is used with anti-oil spout device of tank side setting, make filtering aspect the microparticle, need not dismantle pipeline, can extract screen pack out and clean, it is quite convenient that operation is installed.

According to a kind of vertical rotating sheet type vacuum pump of the present invention, it is characterized in that the two ends that described mist of oil is collected device are circle or ellipse.

Circular or disciform mist of oil is collected device (anti-oil spout device) and has been utilized earth attraction to make oily natural downslide to return opening, is applicable to various types of vacuum pumps, but has versatility.

Use vertical rotating sheet type vacuum pump of the present invention to obtain following beneficial effect:

1. the structure that original motor and vacuum pump is set in parallel in a frame changes the top that motor is placed on the pump housing into, easily producing radially vibrations with original be arrangeding in parallel compares, this kind of drive vertically, thereby utilize earth attraction to reduce vibration, and saved floor space greatly.

2. designed anti-oil spout device, made, do not re-used oil baffle plate, thereby dwindled the volume of the fuel tank and the pump housing, alleviated the quality of pump aspect the anti-oil spout big breakthrough having been arranged.

3. aspect the point of contact, done new improvement, with the point of contact change into of pump housing below vertical ± 30 ℃ between, induction-motor load is reduced greatly, also reduced the consumption of the energy when having improved efficient, and because the variation at point of contact makes center of gravity be in whole vacuum pump bottom, stability better.

4. be provided with and prevent that the oil spout device is used the sump oil separating vessel in tank side, make, need not dismantle pipeline, can extract screen pack out and clean, changed whole pump structure, optimized other existing performances filtering aspect the microparticle.It is quite convenient that operation is installed.

Description of drawings

Fig. 1 is the concrete structure schematic representation of the single-stage vacuum pump under the prior art;

Fig. 2 is the work schematic representation of two-stage vacuum pump under the prior art;

Fig. 3 is the overall structure schematic representation of the two-stage vacuum pump under the prior art of charged motivation;

Fig. 4 is the concrete structure schematic representation of vertical rotating sheet type vacuum pump of the present invention;

Fig. 5 is the plan view of the anti-oil spout device of vertical rotating sheet type vacuum pump of the present invention;

Fig. 6 is the side view of the anti-oil spout device of vertical rotating sheet type vacuum pump of the present invention.

Among the figure: the A-admission space, B-vacuumizes the space, and C-goes out the headroom, D-point of contact, the 1-pump housing, the 2-blade, 3-rotor, 4-spring, 5-outlet valve, 6-oil baffle, the 7-fuel tank cap, 8-relief opening, 9-suction port, 10-fuel tank, 11-suction tude, the 12-pumping fluid, the 13-motor, the 14-return opening, 15-prevents the oil spout device, the 16-exhaust cap, 17-mist of oil absorption net, the 18-mist of oil is collected device, 19-oil gas targeting port, 20-sump oil separating vessel, 21-screen pack, 22-belt, 23-return tube.

Embodiment

The present invention will be further described below by drawings and Examples.

As shown in Figure 4, rotor 3 off-centre of vertical rotating sheet type vacuum pump of the present invention are installed in the bottom in the pump housing (stator) 1, and point of contact D is positioned at the bottom of the internal surface of the outer ring of rotor and the pump housing, and rotor has the blade groove, load onto blade 2 in the groove, the gap of blade outer rim and pump housing internal surface is 2～3 microns.

Motor 13 drives rotor 3 rotations by belt 22 during work, and blade 2 leans on the tension force of centrifugal force and spring 4 that its top is remained with pump housing inwall and contacts, slide along pump housing inwall.Blade rotor become admission space A with the pump housing 1 formed meniscate space segmentation, the space B of bleeding and go out the space of three sealings of headroom C.

If when rotor 3 was pressed the direction rotation of arrow among Fig. 4, the volume in A space increased, pressure reduces, and gas sucks through suction port 9, is in breathing process this moment; Along with dwindling of B space, pressure begins to increase, and is in compression process; The volume in C space further dwindles, when pressure surpassed exhaust pressure, gas was pushed the exhaust valve plate 5 of fuel tank 10 open, by pumping fluid 12 exhaust in anti-oil spout device 15, because the rotor in the motor drives vacuum pump turns round continuously, constantly carrying out air-breathing, compression, exhaust process.Thereby reach the purpose that vacuumizes continuously.

Exhaust valve plate 5 is immersed in 12 li of pumping fluids and goes in the pump to prevent air flow, oil enters pump housing inner chamber when being ejected by gas by each exhaust valve plate, the surface of all motions in the pump housing inner chamber is covered by oil, formed the sealing of air aspiration cavity and exhaust cavity, oil also has been full of whole space simultaneously, to eliminate their influences to limiting vacuum.

Vertical rotating sheet type vacuum pump of the present invention is owing to be provided with anti-oil spout device 15 on fuel tank top, oil gas enters fuel tank 10 and enters anti-oil spout device by oil gas targeting port 19 again, exhaust cap 16 by anti-oil spout device top enters atmosphere again, remaining oil is then sucked by the mist of oil absorption net 17 that mist of oil trap 18 inwalls of anti-oil spout device are provided with, because the mist of oil inner collector wall is circle or ellipse or regular shape, because gravitational effect, oil begins to glide along inwall, and can not taken up once more by gas, deposit to the bottom of mist of oil trap at last, enter return tube 23 again by return opening 14 and return fuel tank 10, and the vacuum pump under the prior art since use oil baffle 6 as the ladder paperback in fuel tank, when oil was taken to oil baffle by gas, oil began to glide, but oil baffle is flat/angle mount, oil can't glide along the plate face, when dripping, again by second, three times gas pressure sprays in the air, discharges from relief opening 8 and causes fuel injection event.

In addition, vertical rotating sheet type vacuum pump of the present invention must when cleaning as long as the screen pack 21 that is used sump oil separating vessel 20 with anti-oil spout device of extracting that the fuel tank bottom is provided with out cleans, need not dismantle pipeline, and the vacuum pump under the prior art will be removed pipeline and pull down all devices and annex after just can take out filtrating equipment.

Vertical rotating sheet type vacuum pump of the present invention, the pumping speed scope is in 2-200 liter/second.Actual pumping speed is that the pressure of pumping hole keeps certain pumping speed within the specific limits, and when pumping hole pressure was low, its actual pumping speed descended.During the pressure that reaches capacity (vacuum), actual pumping speed is zero, and specific embodiment is as described below:

Embodiment 1

When the pumping speed of vertical rotating sheet type vacuum pump of the present invention is 50 liters/second, motor power (output) load 3kw, producing working pressure is 35 handkerchiefs, pumping speed pressure is 35 handkerchiefs.

Embodiment 2

When the pumping speed of vertical rotating sheet type vacuum pump of the present invention is 100 liters/second, transform and its application in electromotor load power 5.5kw, producing working pressure is 70 handkerchiefs, pumping speed pressure is 70 handkerchiefs.

Embodiment 3

When the pumping speed of vertical rotating sheet type vacuum pump of the present invention is 150 liters/second, motor power (output) load 11kw, producing working pressure is 105 handkerchiefs, pumping speed pressure is 105 handkerchiefs.

Ultimate pressure and degree of vacuum: single-stage pump is 1pa, and two-stage pump is 6 * 10 ^-2Pa (0.06pa).

This pressure uses compression vacuum gauge for China's standing order and measures its ultimate pressure.

Vertical rotating sheet type vacuum pump of the present invention compares with the vacuum pump under the prior art that to have floor space little, the pump housing itself is in light weight, the lower end of design in the pump housing, rotor point of contact makes motor load reduce greatly, advantages such as cleaning sump oil and particulate contamination are convenient, be applicable to fields such as various medicine, vacuum drying, plated film, overlay film, chemical industry, light industry, oil metallurgy, have vast market prospect.

Claims

1. a vertical rotating sheet type vacuum pump comprises the pump housing (1) and connected motor (13), it is characterized in that:

Described motor (13) is arranged on the top of the pump housing (1) and is connected with rotor (3) with belt (22);

The fulcrum of the rotor (3) that is provided with in the described pump housing (1) is positioned at the below of the central point of the pump housing, and the point of contact of rotor (D) is the contacting point of pump housing internal surface bottom and rotor outer rim;

The described pump housing (1) one side is provided with admission line (9), and opposite side is provided with fuel tank (10), is provided with anti-oil spout device (15) on the top of this fuel tank.

2. a kind of vertical rotating sheet type vacuum pump as claimed in claim 1, it is characterized in that, described anti-oil spout device (15) comprises exhaust cap (16), mist of oil absorption net (17), mist of oil is collected device (18), oil gas targeting port (19) and return opening (14), it is cylindrical tank shape structure that mist of oil is collected device, wherein exhaust cap is arranged on the top that mist of oil is collected device, mist of oil absorption net is arranged on mist of oil and collects on the inwall of device, the oil gas targeting port be arranged on mist of oil collect device the tank body outside a side and is connected with the top of fuel tank (10), return opening is arranged on mist of oil and collects the bottom of device and pass through return tube (23) and be connected with fuel tank internal.

3. a kind of vertical rotating sheet type vacuum pump as claimed in claim 1 is characterized in that, the bottom of described fuel tank (10) is provided with and prevents the matching used sump oil separating vessel of oil spout device (15) (20), is provided with screen pack (21) in the sump oil separating vessel.

4. a kind of vertical rotating sheet type vacuum pump as claimed in claim 2 is characterized in that, the two ends that described mist of oil is collected device (18) are circle or ellipse.