CN202597110U

CN202597110U - Oil mist filter for vacuum pump

Info

Publication number: CN202597110U
Application number: CN 201220212817
Authority: CN
Inventors: 王建刚; 吴伟明; 王�华
Original assignee: CHANGZHOU HUADONG VACUUM EQUIPMENT CO LTD
Current assignee: CHANGZHOU HUADONG VACUUM EQUIPMENT CO LTD
Priority date: 2012-05-11
Filing date: 2012-05-11
Publication date: 2012-12-12
Anticipated expiration: 2022-05-11

Abstract

The utility model relates to an oil mist filter for a vacuum pump. The oil mist filter comprises a casing, a filter element assembly and an end cover. The casing comprises an outer casing and a filter element support and an air inlet pipe which are fixedly connected with the outer casing. The air inlet pipe is fixed at the closed end of the outer casing. The filter element support comprises a base plate, an inner plate and a connection piece connected with the base plate and the inner plate. The base plate is fixed on the air inlet pipe, and a connection rod with a screw section is fixed on the inner plate. The filter element assembly comprises a filter element and end plates installed at two ends of the filter element. One end plate of the filter element assembly is supported on the base plate in sealing mode, a press plate with an exhaust hole is connected with the other end plate of the filter element assembly in sealing mode, a sealing plate is arranged on the press plate and blocks the exhaust hole, the end cover with an air outlet is connected onto the opening end of the outer casing in sealing mode, the connection rod penetrates through the press plate, the sealing plate and a spring press plate on the end cover to be connected with a nut, and two ends of a spring sleeved on the connection rod respectively abut against the sealing plate and the spring press plate. The oil mist filter is simple in structure, capable of automatically reducing pressure when being blocked and safe in use.

Description

The vacuum pump oil mist resistant filter

Technical field

The utility model relates to a kind of vacuum pump oil mist resistant filter, belongs to the vacuum pump technology field.

Background technique

Vacuum pump utilizes high speed rotating or slide plate the to-and-fro motion rotor in of eccentric rotor in cylinder to bleed with the volume that changes the working room into, and in breathing process, the air aspiration cavity volume increases; Degree of vacuum reduces, and gas in the container is sucked pump chamber, smaller volume in exhaust process; Pressure increases; Final through outside the gas excavationg pump of oil sealing with suction, because the air behind vacuum pump generally all has steam and oily vapour, so on the vacuum pump oil mist separator can be installed; Through oil mist separator water smoke that has in the pressurized air and mist of oil are filtered out; Clean pressurized air is drained into required operational site, after oil mist separator work a period of time, will stop up, and need to change oil mist separator.Common oil mist separator is made up of shell, element kit and end cap, and its shell is provided with inlet hole, and end cap is provided with air outlet hole; Get into oil mist separator oil gas through discharging through the air outlet hole on the end cap behind the element kit; Pressure gauge is installed on the oil mist separator, shows whether stop up, when pressure gauge reading is positioned at red area through the pressure gauge on the oil mist separator; Explain that oil mist filter stops up, just must change oil mist filter.But in realizing operation; Like opinion is to adopt pressure gauge or alarm is installed, and after oil mist filter stops up, can't in time reduce the pressure in the oil mist filter, and the electric current of motor is increased; Vacuum pump can not normally be moved, and and be prone to cause the damage of vacuum pump.

Summary of the invention

It is a kind of simple in structure that the purpose of the utility model provides, and when oil mist filter stops up, can reduce pressure vacuum pump oil mist resistant filter safe in utilization automatically.

The utility model is that the technological scheme that achieves the above object is: a kind of vacuum pump oil mist resistant filter; Comprise housing, be installed in element kit and end cap in the housing, it is characterized in that: described housing comprises shell and the filter core support and the suction tude that are fixedly connected with shell, and suction tude is fixed on the closed end of shell; Pressure gauge is installed on the suction tude; And the suction tude end face is provided with flange plate, and the filter core support comprises base plate, link and inner panel, and base plate is fixed on the suction tude; Inner panel is connected with suction tude through link, and inner panel is fixed with threaded section connecting rod; Described element kit comprises filter core and the end plate that is installed in the filter core two ends; Filter core comprise inner skeleton, outside guard and be arranged on skeleton and guard between filter screen; An end plate sealing of element kit is bearing on the base plate, and the pressing plate with exhaust port is sealedly connected on another end plate of element kit, and sealing plate is arranged on the pressing plate and keeps off at the exhaust port place; End bracket enclosed with air outlet is connected the opening end of shell; The spring bearer plate that connecting rod passes on pressing plate, sealing plate and the end cap is connected with nut, and the both ends of the spring that is enclosed within on the connecting rod withstands on sealing plate respectively with on the spring bearer plate, and shell is provided with oil discharge screw.

The utility model is provided with suction tude on shell, through suction tude the oil-containing pressurized gas is introduced in the element kit, and the shell internal fixation has the filter core support; Its filter core support comprises base plate and inner panel, owing to is connected by link between base plate and the inner panel, so can make things convenient for the replacing of element kit; And the pressing plate through having exhaust port seals the opposite side of element kit; Because the end cap that is tightly connected with the shell aperture end is provided with spring bearer plate, be fixed on the spring bearer plate that the link on the inner panel passes on pressing plate, sealing plate and the end cap and be connected with nut, so when end cap is installed in shell; And sealing plate is pressed on the pressing plate through spring bearer plate and spring; Make sealing plate block the exhaust port place of pressing plate, when the oil mist filter proper functioning, air-flow is discharged through filter screen from filter screen inside; And when its internal pressure increase, can discharge through the exhaust port on the pressing plate.The utility model can not only conveniently be installed in end cap on the shell, and is simple in structure, compact, because the pressure of spring can be through nut control; Therefore sealing plate can be through the pressure control of spring, after the filter screen of oil mist filter stops up, during because of its pressure inside increase and above setting pressure; Overcome the pressure of spring through gas pressure, and open sealing plate automatically, the element kit gas inside is discharged through the exhaust port on the pressing plate; Reach the effect of automatic decompression, and reduce motor current, vacuum pump can normally be moved; Safe in utilization, so improved the working life of vacuum pump.

Description of drawings

Below in conjunction with accompanying drawing the embodiment of the utility model is made further detailed description.

Fig. 1 is the structural representation of the utility model vacuum pump oil mist resistant filter.

Fig. 2 is that the K of Fig. 1 is to structural representation.

Wherein: 1-suction tude, 1-1-flange plate, 1-2-arm, 2-shell, 3-base plate, 4-end plate, 5-guard; 6-liner, 7-filter screen, 8-skeleton, 9-link, 10-inner panel, 11-seal ring; 12-end cap, 12-1-air outlet, 12-2-spring bearer plate, 13-pressing plate, 13-1-exhaust port, 14-sealing plate; 15-sealing gasket, 16-connecting rod, 17-spring, 18-gland nut, 19-thread seal pad, 20-oil discharge screw.

Embodiment

See Fig. 1, the vacuum pump oil mist resistant filter of the utility model shown in 2, comprise housing, be installed in element kit and end cap 12 in the housing.The housing of the utility model comprises shell 2 and filter core support that is fixedly connected with shell 2 and suction tude 1; Suction tude 1 is fixed on the closed end of shell 2; On the suction tude of the utility model pressure gauge is installed, suction tude 1 end face is provided with flange plate 1-1, connects the air outlet channel on the vacuum pump through flange plate 1-1; After compression gas introduced in the oil mist filter through the suction tude on the oil mist filter 1 filter; Be fixed with arm 1-2 on the suction tude 1 of the utility model, pressure gauge then is installed on the arm 1-2, in time detects the pressure in the vacuum pump through pressure gauge.See shown in Figure 1ly, the utility model filter core support comprises base plate 3, link 9 and inner panel 10, and base plate 3 is fixed on the suction tude 1; Inner panel 10 is connected with suction tude 1 through link 9; Inner panel 10 fixedly has the connecting rod 16 of thread section, and this link 9 can adopt pipe, and this pipe can be connected with suction tude 1 through support; Promptly do not influence pressurized gas is introduced element kit inside, and the replacing of element kit easily.

See shown in Figure 1ly, the element kit of the utility model comprises filter core and is installed in the end plate 4 at filter core two ends, filter core comprise inner skeleton 8, outside guard 5 and be arranged on skeleton 8 and guard 5 between filter screen 7; In gas gets into element kit, the mist of oil through filter screen 7 in the filtering gas, the utility model is for improving the effect of filtering mist of oil; The outside also is provided with the liner 6 of ventilation oil suction in the filter screen 7 of element kit, and an end plate 4 sealings of element kit are bearing on the base plate 3, and the pressing plate 13 with exhaust port 13-1 is sealedly connected on another end plate 4 of element kit; Seal ring 11 is arranged in the seal groove of end plate 4, makes element kit in housing, can keep sealing effect, and sealing plate 14 is arranged on the pressing plate 13 and keeps off at exhaust port 13-1 place; The utility model sealing plate 14 1 sides are equipped with sealing gasket 15, and sealing gasket 15 joins with pressing plate 13, have the end cap 12 of air outlet 12-1 and the opening end of shell 2 and are tightly connected; Be connected with outlet pipe on this end cap 12, air outlet 12-1 is arranged on the outlet pipe, and outlet pipe is provided with screw thread; Convenient with outside pipeline is connected; The spring bearer plate 12-2 that connecting rod 16 passes on pressing plate 13, sealing plate 14 and the end cap 12 is connected with nut, and the both ends of the spring 17 that is enclosed within on the connecting rod 16 withstands on respectively on sealing plate 14 and the spring bearer plate 12-2, can be replaceable oil mist filter through the dismounting nut therefore; And after the filter screen 7 of oil mist filter stops up; Because the increase of gas pressure is backed down the sealing plate 14 that is positioned at pressing plate 13 1 sides through gas, through the exhaust port 13-1 on the pressing plate 13; And the pressure in the release vacuum pump normally moves vacuum pump.The present invention is convenient processing and assembling; Also be provided with thread seal pad 19 on the pressing plate 13, connecting rod 16 passes pressing plate 13 and thread seal pad 19, seals through the thread section on 19 pairs of connecting rods 16 of thread seal pad; Gland nut 18 is screwed on the thread section of connecting rod 16 and is crimped on thread seal pad 19; Thread seal pad 19 is arranged in the hole of sealing plate 14, during proper functioning, filters through 7 pairs of oil-containing gases of the filter screen in the oil mist filter.See shown in Figure 2ly, the utility model is got rid of the fluid in the oil mist filter outside for convenient, and oil discharge screw 20 also is installed on the shell 2.

See Fig. 1, shown in 2; In the utility model when work,, the pressurized gas that vacuum pump is discharged enters into the inside of element kit from suction tude 1, after filter screen 7 filters; Air outlet 12-1 through being arranged on the end cap 12 discharges satisfactory clean air, reaches the effect that reduces noise simultaneously.Use certain hour at vacuum pump, after the filter screen 7 of element kit stops up, when arriving setting value owing to the increase of the pressure in the vacuum pump; Gas is opened sealing plate 14, through the exhaust port 13-1 on the pressing plate 13 not filtrable gas is directly discharged, and reduces motor current; When need were changed element kit, detachable nut was changed element kit, and often opens oil discharge screw 20; The inner trapped fuel of oil mist filter is bled off, guarantee that vacuum pump runs well.

Claims

1. vacuum pump oil mist resistant filter; Comprise housing, be installed in element kit and end cap (12) in the housing; It is characterized in that: described housing comprises shell (2) and filter core support that is fixedly connected with shell (2) and suction tude (1); Suction tude (1) is fixed on the closed end of shell (2), and suction tude is equipped with pressure gauge on (1), and suction tude (1) end face is provided with flange plate (1-1); The filter core support comprises base plate (3), link (9) and inner panel (10); Base plate (3) is fixed on the suction tude (1), and inner panel (10) is connected with suction tude (1) through link (9), and inner panel (10) is fixed with threaded section connecting rod (16); Described element kit comprises filter core and the end plate (4) that is installed in the filter core two ends; Filter core comprise inner skeleton (8), outside guard (5) and be arranged on skeleton (8) and guard (5) between filter screen (7); An end plate (4) sealing of element kit is bearing on the base plate (3); Pressing plate (13) with exhaust port (13-1) is sealedly connected on another end plate (4) of element kit; Sealing plate (14) is arranged on pressing plate (13) and goes up and keep off and locating at exhaust port (13-1); End cap (12) with air outlet (12-1) is sealedly connected on the opening end of shell (2); The spring bearer plate (12-2) that connecting rod (16) passes on pressing plate (13), sealing plate (14) and the end cap (12) is connected with nut, and spring (17) two ends that are enclosed within on the connecting rod (16) withstand on respectively on sealing plate (14) and the spring bearer plate (12-2), and shell is equipped with oil discharge screw on (2).

2. vacuum pump oil mist resistant filter according to claim 1 is characterized in that: said sealing plate (14) inboard is connected with sealing gasket (15), and sealing gasket (15) joins with pressing plate (13).

3. vacuum pump oil mist resistant filter according to claim 1; It is characterized in that: described pressing plate (13) is provided with thread seal pad (19); Connecting rod (16) passes pressing plate (13) and thread seal pad (19); Gland nut (18) is screwed on the thread section of connecting rod (16) and is crimped on thread seal pad (19), and thread seal pad (19) is arranged in the hole of sealing plate (14).

4. vacuum pump oil mist resistant filter according to claim 1 is characterized in that: the interior outside of the filter screen of said element kit (7) also is provided with the liner (6) of ventilation oil suction.