CN201650658U - Vacuum pump - Google Patents
Vacuum pump Download PDFInfo
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- CN201650658U CN201650658U CN2010201168971U CN201020116897U CN201650658U CN 201650658 U CN201650658 U CN 201650658U CN 2010201168971 U CN2010201168971 U CN 2010201168971U CN 201020116897 U CN201020116897 U CN 201020116897U CN 201650658 U CN201650658 U CN 201650658U
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Abstract
The utility model relates to a vacuum pump, which comprises a pump body, an air cylinder, a piston, a cam, an air inlet one-way valve, an air outlet one-way valve and a matching motor, wherein the air cylinder is nested in the inner portion of the pump body, and a main shaft of the matching motor is inserted in the middle section of the pump body. The vacuum pump is characterized in that the pump body is symmetrically connected by two same pumps, the cam is nested on the main shaft, and the two pistons are symmetrically arranged on the two sides of the cam. One side of each piston, which towards the cam is provided with an L-type top rod, the circumference of the cam is provided with a guide rail which is covered with the L-type top rod, the inner portion of the pump body is separated into three air cylinders by the two pistons, and each air cylinder is provided with the air inlet one-way valve and the air outlet one-way valve. The vacuum pump can reduce the temperature of the pump body, solves the problem of lubrication and fiction between main parts of the pump body, increases the work efficiency, and reduces the vibration and noise of a system. The vacuum pump is suitable for oil-gas recycle of gas stations, also can be used for extracting other medium with low power consumption and small capacity.
Description
Technical field
The utility model relates to a kind of vacuum pump, is specifically related to a kind of piston type vacuum pump.
Background technique
Add in the gasoline process and can discharge gasoline vapor in a large number at automobile from reservoir port, befouling environment not only, and cause the ample resources waste, bring potential safety hazard simultaneously.In the existing most orthodox car refueling processes of China, do not implement the oil gas recovery technology.In existing oil gas recovery plant, oil gas reclaiming type vacuum pump is one of nucleus equipment of oil gas recovery plant.Existing oil gas recovery vacuum pump has two kinds of reciprocating piston type and rotary sheet types, and wherein the structure of piston type oil gas recovery vacuum pump and principle are as shown in Figure 1.
Wherein, the critical piece of pump is cylinder 1 and the piston 2 of doing linear reciprocating motion therein.The driving of piston 2 is finished with connecting rod 3.Except that above-mentioned critical piece, also have outlet valve 4 and Aspirating valves 5.
During the pump running, under the driving of motor,, the piston in the cylinder is moved reciprocatingly by the effect of connecting rod.When piston in cylinder from left end when right-hand member is movable.Because the left cavity volume of cylinder constantly increases, the density of gas reduces in the cylinder, and forms pumping process, and the gas in the container enters chamber, a pump housing left side through Aspirating valves 5 at this moment.When the piston arrives least significant, just be full of gas in the cylinder fully.Then piston moves from right to left side, and this moment, Aspirating valves 5 cut out.Gas in the cylinder moves from right to left along with piston and is compressed gradually, and when the pressure of gas in the cylinder reached or is a bit larger tham a barometric pressure, outlet valve 4 was opened, and gas is discharged in the atmosphere, finishes a work cycle.When piston moved from left to right again, inspiration part gas repeated last circulation again, go down so repeatedly, when the gas pressure in cylinder reaches requirement till.
In practical work process, there is following point in existing piston formula vacuum pump:
1, owing to produces violent sliding friction between piston and cylinder, when long-play, can produce a large amount of heats, make piston and cylinder body produce certain thermal expansion, in case this thermal expansion causes the gap between piston and the cylinder to disappear, the locking of two parts possibility is no longer worked pump.
2, maximum problem is a lubrication problem between the moving element in the oil gas recovery vacuum pump running.This is because gasoline is washing agent with respect to conventional grease, and after operation a period of time, lubricating grease has been cleaned up by gasoline soon at vacuum pump.Adopt lubricating grease can not reduce the friction factor of moving element effectively for a long time.In case the lubricated disappearance between the parts, the frictional force between the parts can raise rapidly, and frictional force is converted to heat.Therefore, in traditional oil gas recovery vacuum pump course of working, must stay the size of coming the absorbing member thermal expansion to produce in enough gaps between moving element increases.Gap between the moving element is too big, can make system's gas leakage, reduces the degree of vacuum of vacuum pump, thereby reduces the exhaust capacity of vacuum pump.Simultaneously, because frictional force is excessive, also greatly reduce the driving efficient of motor.For reaching higher exhaust capacity, need the power of expanded motor, also reduce greatly the working life of pump.
3, the friction between piston and cylinder body causes serious wear, can destroy sealing, strengthens the gap between moving element, produces gas leakage, reduces the degree of vacuum of vacuum, thereby reduces the exhaust capacity of vacuum pump, influences working efficiency.
Summary of the invention
For fretting wear, the vibrating noise that overcomes the existence of existing piston formula vacuum pump, the deficiency that influences working efficiency, the purpose of this utility model is: a kind of vacuum pump is provided, this vacuum pump can reduce the temperature of the pump housing, solve the lubricated and friction problem between pump housing critical piece, increase work efficiency, and reduce the vibrations and the noise of system.
The technological scheme that its technical problem that solves the utility model vacuum pump adopts is as follows:
A kind of vacuum pump, it comprises the pump housing, cylinder, piston, cam, breather check valve, outgassing nonreturn valve and necessary electromotor, cylinder is nested in the inside of the pump housing, the main shaft of necessary electromotor inserts the middle section of the pump housing, wherein, this pump housing is connected by two identical pump symmetries, cam is nested on this main shaft, two piston symmetries are installed in the both sides of cam, each piston is equipped with L type push rod towards a side of cam, cam be circumferentially with the guide rail that is interlockingly connected with L type push rod, by these two pistons pump housing inside is separated out three cylinders, all offer breather check valve and outgassing nonreturn valve on each cylinder.
Described vacuum pump, wherein, this cam is the ellipse of shape symmetry.
Described vacuum pump, wherein, by the pin on the pump housing with cam orientation.
Described vacuum pump, wherein, this necessary electromotor is an anti-explosion motor.
Described vacuum pump, its, this piston adopts teflon or nylon material to make.
Compared with prior art, the utlity model has following beneficial effect:
1, reduces the friction of the pump housing and piston space, improve the lubricated of system
The utility model adopts the material of teflon as piston, and the friction factor of teflon is very little, is one of best solid lubricant, thereby can solve lubricating between moving element, the power of reducing friction, the working life of improving moving element.
2, reduce the vibrations and the noise sound of system
The vibrations of conventional vacuum pump are from crank and the asymmetric to-and-fro motion of piston.It is one of characteristics of the present utility model that symmetry is installed.The piston symmetric motion of same structure and weight, the parts of driven plunger change symmetrical cam into by crank, and the cancellation conventional linkage by the direct push-and-pull reciprocating motion of the pistons of cam, all can make the vibrations of component movement and noise significantly reduce.
3, can reduce the output power of drive motor
Because the utility model can solve the gas leakage problem of vacuum pump, improve the pumping efficiency of vacuum pump, thereby can effectively reduce the rotating speed of drive motor, thereby can reduce the output power of motor.
Description of drawings
Fig. 1 is the structural representation of existing piston formula vacuum pump;
Fig. 2 is the structural front view of the utility model symmetry piston type vacuum pump;
Fig. 3 is the top plan view of the utility model symmetry piston type vacuum pump.
Description of reference numerals: the 1-pump housing; The 2-piston; 3-L type push rod; The 4-cam; The 5-breather check valve; The 6-outgassing nonreturn valve; The 7-main shaft; The 8-pin; The 9-guide rail; A-first cylinder; B-second cylinder; C-the 3rd cylinder.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified.
A Fig. 2 and an embodiment who Figure 3 shows that the utility model vacuum pump, vacuum pump in the present embodiment is to be used for the piston type vacuum pump that oil gas reclaims, it comprises the pump housing 1, cylinder (A, B, C), piston 2, cam 4, breather check valve 5, outgassing nonreturn valve 6 and necessary electromotor (not shown), wherein, the pump housing 1 is connected by bolt symmetrically by two identical pumps, the middle section that the main shaft 7 of necessary electromotor inserts the pump housing 1, cam 4 is nested on the main shaft 7, and by the pin 8 on the main shaft 7 with cam 4 location, this cam 4 is the ellipse of shape symmetry.Two piston 2 symmetries are installed in the both sides of cam 4, and each piston 2 is equipped with L type push rod 3 towards a side of cam 4, cam 4 be circumferentially with the guide rail 9 that is interlockingly connected with L type push rod 3, move back and forth by cam 4 direct push-and-pull pistons 2 with this.The first cylinder A, the second cylinder B and the 3rd cylinder C all are nested in the inside of the pump housing 1, are respectively the first cylinder A and the 3rd cylinder C between the end of the piston 2 and the pump housing 1, are the second cylinder B between two pistons 2.The first cylinder A, the second cylinder B and the 3rd cylinder C all offer breather check valve 5 and outgassing nonreturn valve 6.
Described necessary electromotor is an anti-explosion motor.
Described piston 2 adopts teflon or nylon material to make, this is because the friction factor of teflon is very little, is one of best solid lubricant, thereby can solve lubricating between moving element, the power of reducing friction, the working life of improving moving element.
The working procedure of the utility model vacuum pump is as follows:
When cam 4 began to rotate under motor driving, cam 4 promoted piston 2 and realize to-and-fro motion in the first cylinder A and the second cylinder B.When two pistons 2 relatively closely moved, the outgassing nonreturn valve 6 on the first cylinder A and the 3rd cylinder C was closed, and breather check valve 5 is opened, and begins air-breathing; Outgassing nonreturn valve 6 on the second cylinder B is opened, and breather check valve 5 is closed, the beginning exhaust.When the motion of piston 2 relative separation ground, the outgassing nonreturn valve 6 on the first cylinder A and the 3rd cylinder C is opened, and breather check valve 5 is closed, the beginning exhaust; Outgassing nonreturn valve 6 on the second cylinder B is closed, and breather check valve 5 is opened, and begins air-breathing.With this to-and-fro motion.In the continuous operation process of vacuum pump, constantly carry out the process of air inlet, compression, exhaust, realize continuous air extraction.
The utility model is applicable to that the gas station carries out oil gas and reclaims, and also can be used for the extraction of other medium of low power consumption, small capacity.
Compared with prior art, the utlity model has following beneficial effect:
1, reduces the friction of the pump housing and piston space, improve the lubricated of system
The utility model adopts polytetrafluoroethylene (PTFE) as the material of piston, and the coefficient of friction of polytetrafluoroethylene (PTFE) is very little, is one of best solid lubricant, thereby can solve lubricating between moving component, the power of reducing friction, the service life of improving moving component.
2, reduce vibrations and the noise sound of system
The vibrations of conventional vacuum pump are from crank and the asymmetric reciprocating motion of piston. The symmetrical installation is one of characteristics of the present utility model. The piston symmetric motion of same structure and weight, the parts of driven plunger change symmetrical cam into by crank, and the vibrations of component movement and noise are significantly reduced.
3, can reduce the power output of drive motors
Because the utility model can solve the gas leakage problem of vavuum pump, improve the pumping efficiency of vavuum pump, thereby can effectively reduce the rotating speed of drive motors, thereby can reduce the power output of motor.
More than be illustrative to description of the present utility model; and it is nonrestrictive; those skilled in the art is understood, and the spirit and the range that limit in claim can carry out many modifications, variation or equivalence to it, but they all will fall in the protection domain of the present utility model.
Claims (5)
1. vacuum pump, it comprises the pump housing, cylinder, piston, cam, breather check valve, outgassing nonreturn valve and necessary electromotor, cylinder is nested in the inside of the pump housing, the main shaft of necessary electromotor inserts the middle section of the pump housing, it is characterized in that, this pump housing is connected by two identical pump symmetries, cam is nested on this main shaft, two piston symmetries are installed in the both sides of cam, each piston is equipped with L type push rod towards a side of cam, cam be circumferentially with the guide rail that is interlockingly connected with L type push rod, by these two pistons pump housing inside is separated out three cylinders, all offer breather check valve and outgassing nonreturn valve on each cylinder.
2. vacuum pump according to claim 1 is characterized in that, this cam is the ellipse of shape symmetry.
3. vacuum pump according to claim 1 is characterized in that, by the pin on the motor shaft with cam orientation.
4. vacuum pump according to claim 1 is characterized in that, this necessary electromotor is an anti-explosion motor.
5. vacuum pump according to claim 1 is characterized in that, this piston adopts teflon or nylon material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201168971U CN201650658U (en) | 2010-02-11 | 2010-02-11 | Vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201168971U CN201650658U (en) | 2010-02-11 | 2010-02-11 | Vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650658U true CN201650658U (en) | 2010-11-24 |
Family
ID=43115891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201168971U Expired - Fee Related CN201650658U (en) | 2010-02-11 | 2010-02-11 | Vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650658U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996389A (en) * | 2011-09-16 | 2013-03-27 | 奚文进 | Manual liquid high-pressure pump |
| TWI465641B (en) * | 2011-01-20 | 2014-12-21 | Ulvac Kiko Inc | Piston and vacuum pump |
| CN113213302A (en) * | 2021-04-15 | 2021-08-06 | 苏州科达液压电梯有限公司 | Elevator car braking fixing device and fixing method thereof |
-
2010
- 2010-02-11 CN CN2010201168971U patent/CN201650658U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI465641B (en) * | 2011-01-20 | 2014-12-21 | Ulvac Kiko Inc | Piston and vacuum pump |
| CN102996389A (en) * | 2011-09-16 | 2013-03-27 | 奚文进 | Manual liquid high-pressure pump |
| CN113213302A (en) * | 2021-04-15 | 2021-08-06 | 苏州科达液压电梯有限公司 | Elevator car braking fixing device and fixing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20150211 |
|
| EXPY | Termination of patent right or utility model |