CN208236647U - A kind of vacuum pump and its multistage vacuum pump - Google Patents

A kind of vacuum pump and its multistage vacuum pump Download PDF

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Publication number
CN208236647U
CN208236647U CN201820351575.1U CN201820351575U CN208236647U CN 208236647 U CN208236647 U CN 208236647U CN 201820351575 U CN201820351575 U CN 201820351575U CN 208236647 U CN208236647 U CN 208236647U
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CN
China
Prior art keywords
shaft
vacuum pump
pump
pump housing
shell
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201820351575.1U
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Chinese (zh)
Inventor
潘晓江
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潘晓江
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Priority to CN201820351575.1U priority Critical patent/CN208236647U/en
Application granted granted Critical
Publication of CN208236647U publication Critical patent/CN208236647U/en
Expired - Fee Related legal-status Critical Current
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Abstract

A kind of vacuum pump and its multistage vacuum pump, including the pump housing with inner cavity and through the shaft at pump housing center, the exhaust passage of connection inner cavity is provided in the pump housing, the exhaust outlet of the exhaust passage is located on the outer wall of the pump housing, it is characterized in that the pump housing is rigidly connected with shaft and can rotate with shaft, the inlet channel of connection pump housing inner cavity is provided in shaft, the air inlet of the inlet channel is located on the end face of the shaft.Multistage vacuum pump includes multiple vacuum pumps, each vacuum pump is placed in respective closing shell, rotating shaft support is on the housing and air inlet exposes to the shell, it is then provided on shell and the gas of exhaust outlet is discharged in the gas outlet outside shell, connecting tube is then provided between adjacent shell, the connecting tube one end is connected with the gas outlet of the latter shell in adjacent housings, and the other end of the connecting tube is connected with the air inlet in the shaft for exposing to previous shell in adjacent housings.The vacuum pump and its multistage vacuum pump that a kind of structure is simple, at low cost are provided for people.

Description

A kind of vacuum pump and its multistage vacuum pump
Technical field
The utility model relates to a kind of vacuum pump and its multistage vacuum pumps.
Background technique
Vacuum pump is for manufacturing specific hypobaric.Common vacuum pump has liquid-ring type vacuum on the market at present Pump, rotary-vane vaccum pump, slide-valve vacuum pump, screw pump and lobe pump etc., these existing vacuum pumps have the characteristics that one it is common: At least one core part for rotating or sliding relative to the pump housing, such as: impeller, blade, eccentric wheel and slide valve lever, screw rod, 8 words Shape rotor etc..After long-time service, between these core parts and the pump housing because abrasion meeting so that existing for gap it is increasing, thus It will lead to the reduction of sealing performance, and then will affect using effect.For example, main includes pump for rotary-vane vaccum pump Body, rotor and blade.Rotor and pump housing lumen centers have offset distance, and blade is located in rotor slot and can rotate and slide with rotor, The outer end of blade is kept in contact with pump housing inner wall, will form the working chamber of sealing between two adjacent blades and pump housing inner wall. In rotary-vane vaccum pump use process, the pressure of working chamber can change with the variation of working chamber volume, and operating on low voltage chamber is taken out Gas, high-pressure working chamber is deflated, to manufacture hypobaric.In the process, on the inside of due to blade and pump housing inner wall, rotor slot Between remain CONTACT WITH FRICTION, easily wear, and with the abrasion of blade, cause blade and pump housing inner wall and rotor slot Between gap increase, cause the leakproofness of working chamber to decline, will affect the whole using effect of rotary-vane vaccum pump.
To solve the above-mentioned problems, all kinds of vacuum pumps are modified currently on the market, such as addition lubricating fluid, optimization Blade design and the change pump housing or the material of blade etc..The abrasion that these modes improve vacuum pump to a certain extent is existing As also improving material and technique but simultaneously but also the becoming increasingly complex of structure of vacuum pump, improves machining accuracy It is required that so that high production cost, or even higher requirements are also raised in operation and maintenance.
Summary of the invention
First technical problem to be solved in the utility model is the status for the prior art, provides a kind of structure letter Single, vacuum pump at low cost.
Second technical problem to be solved in the utility model is the status for the prior art, provides a kind of structure letter Single, multistage vacuum pump at low cost.
The utility model solves technical solution used by above-mentioned first technical problem are as follows: a kind of vacuum pump, including band There are the pump housing of inner cavity and the shaft through pump housing center, the exhaust passage of connection inner cavity is provided in the pump housing, the exhaust is logical The exhaust outlet in road is located on the outer wall of the pump housing, it is characterised in that: the pump housing and shaft are rigidly connected and can revolve with the shaft Turn, the inlet channel for being connected to the pump housing inner cavity is provided in the shaft, the air inlet of the inlet channel is located at the shaft On end face.
In the above scheme, it is preferred that the exhaust passage is located in the plane perpendicular with shaft.Centrifugal force at this time Greatly, pumping effect is good.
In above-mentioned preferred embodiment, it is further preferred that, the exhaust passage by the pump housing the lateral exhaust side in inner cavity Round and smooth extension, and extending direction is contrary with pivot.Due to the direction of motion of pump housing outside air and the rotation of the pump housing Contrary, exhaust passage makees so design, so that the outgassing direction of exhaust ports is along air movement direction herein, and When outside air moves, a low-pressure area can be formed at this, this can more attract the gas in exhaust passage to be discharged from exhaust ports, To further increase pumping effect.
In above-mentioned preferred embodiment, assembled in order to facilitate processing with assembling, the pump housing by main body and pump cover, institute The inner cavity stated and exhaust passage are equipped between main body and the joint surface of pump cover, and between the main body and the joint surface of pump cover For sealing the gasket of the inner cavity and exhaust passage.It can prevent gas from letting out after being bonded each component for the pump housing being composed Leakage, improves the leakproofness of vacuum pump.
In the above scheme, corresponding groove can have been designed on the opposing end surface of main body and pump cover, it can be with after split Form the inner cavity and exhaust passage., but it is preferred that i.e. inner cavity and exhaust passage is by being provided with direction using following scheme Groove and pump cover on the end face of the main body of pump cover cover, as long as at this point, process groove on the end face of main body, So that processing more convenient.
It is more smoothly in order to be vented, in the above embodiments, it is preferred that the exhaust passage has multiple, edge respectively The circumferential direction of the pump housing is uniformly arranged.
Equally, in order to which air inlet is smooth, axial passage and multiple diameters that the inlet channel is connected by one with air inlet It is formed to channel, each radial passage is connected to the inner cavity and axial passage.
It is preferred that being provided with sealing ring between the pump housing and the contact portion of shaft.The setting of sealing ring can be to prevent Gas leakage only occurs between the rigidly connected pump housing and shaft, the overall tightness of vacuum pump can be improved.
The both ends of the shaft supports on the rack, to ensure the stability of vacuum pump work.
The utility model solves technical solution used by above-mentioned second technical problem are as follows: a kind of multistage vacuum pump, packet Include the vacuum pump of above-mentioned each scheme, it is characterised in that: each vacuum pump is placed in respective closing shell, described The enterprising port of shaft exposes to the shell, is then provided on the shell and the gas of the exhaust outlet is discharged in the outlet outside shell Mouthful, it is then provided with connecting tube between adjacent shell, the gas outlet phase of the connecting tube one end and the latter shell in adjacent housings Even, the other end of the connecting tube is connected with the air inlet in the shaft for exposing to previous shell in adjacent housings.
Compared with prior art, since the utility model is dexterously by the pump housing and pivot design at rigid connection, make the pump housing When generated centrifugal force and air are relative to the pump housing reverse motions when can rotate with shaft, and be rotated using the pump housing Exhaust port area generate low pressure provided by suction, in the double action of this centrifugal force and suction so that from air inlet into The gas entered successively continuously discharges to manufacture low pressure ring through inlet channel, inner cavity, exhaust passage, exhaust outlet Border, and due to eliminating shell, without considering abrasion, very high-precision, structure are just not necessarily to inner cavity and inlet channel, exhaust passage It is again simple, thus easy to process, low manufacture cost.It especially include that multiple vacuum pump is formed by multistage vacuum pump, it can The use environment for realizing discharge air acquisition more condition of high vacuum degree step by step, so that application range is wider at low cost.
Detailed description of the invention
Fig. 1 is axial sectional view when the utility model embodiment vacuum pump is connected with vacuum tank;
Fig. 2 be Fig. 1 in A-A to cross-sectional view;
Fig. 3 is the axial sectional view for the multistage vacuum pump being made of multiple the utility model embodiments (with vacuum tank phase Even).
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
As illustrated in fig. 1 and 2, which includes the pump housing 1 and axially penetrates through in the shaft 2 at 1 center of the pump housing, middle pump body 1 It is designed to disc-shaped structure (can certainly be other shapes), the inside of the pump housing 1 has an inner cavity 11, is provided with connection in the pump housing The exhaust outlet 13 of the exhaust passage 12 of the inner cavity 11, the exhaust passage 12 is located on the outer wall of the pump housing 1.In order to easily obtain institute State inner cavity 11 and exhaust passage 12, in the present embodiment, which passes through the fasteners such as bolt by main body 1A and pump cover 1B and assemble At above-mentioned inner cavity 11 and exhaust passage 12 are between main body 1A and the joint surface of pump cover 1B, that is, main body 1A and pump cover 1B Opposing end surface on can design corresponding groove, inner cavity 11 and exhaust passage 12, the present embodiment are formed after the two split In, it is preferred that groove is opened on the end face of main body, and pump cover, which directly covers to be located in main body, covers groove, that is, is formed in described Chamber 11 and exhaust passage 12, in this way processing get up more convenient.And in order to guarantee the leakproofness between joint surface, main body 1A with The gasket 3 for sealing inner cavity 11 and exhaust passage 12 is equipped between the joint surface of pump cover 1B.
The above-mentioned pump housing 1 and shaft 2 are rigid connection, for example the modes such as keyway can be taken to connect.The both ends of shaft 2 pass through Bearing is supported in rack 4, can be rotated around rack 4, and the inlet channel 21 of the inner cavity 11 of the connection pump housing is provided in the shaft 2, The air inlet 22 of the inlet channel is located on the end face of the shaft 2.And in order to ensure air inlet is smooth, in the present embodiment, air inlet The axial passage 21A and four radial passage 21B that channel 21 is connected by one with air inlet are formed, and each radial passage is then connected to Inner cavity 11 and axial passage 21A.
In order to improve the leakproofness of vacuum pump, sealing ring 5 is additionally provided between the above-mentioned pump housing 1 and the contact portion of shaft 2.
In this way, when in use, first the vacuum tank 6 vacuumized will be needed to be connected with the air inlet 22 in shaft 2, then The motor (not shown) for starting vacuum pump, when rotating the pump housing 1 with speed M along direction shown in Fig. 2 arrow with shaft 2, Under the action of centrifugal force, the gas of inner cavity 11 is entered continuously through exhaust passage 12 from outlet 13 from air inlet 22 It throws away, so that vacuum tank 6 be made to obtain required vacuum environment.
In order to enable above-mentioned centrifugal force is bigger, exhaust effect is more preferable, in the present embodiment, it is preferred that exhaust passage 12 In in the plane perpendicular with shaft 2.And exhaust passage 12 has multiple (they being four in the present embodiment), respectively along the week of the pump housing 1 To being uniformly arranged.Simultaneously in view of the air in 1 outside of the pump housing can generate the high speed gas relative to 1 direction of rotation reverse motions of the pump housing Stream, the movement velocity of the high-speed flow are V, which can generate low-pressure area in exhaust side when by exhaust outlet 13, To generate suction to the air-flow in exhaust passage 12, in order to enable the suction maximizes, it is preferred that above-mentioned exhaust passage 12 Be designed to from 11 side of the inner cavity of the pump housing 1 to the round and smooth extension in 13 side of exhaust outlet, and extending direction and 2 direction of motion of shaft on the contrary, this When, the direction of exhaust outlet 13 enables the gas in inner cavity 11 along exhaust passage along the air movement direction in 1 outside of the pump housing 12 while successfully throw away, and is also quickly taken away under the attraction of low-pressure area caused by air stream on the outside.I.e. in centrifugal force Under double action with outside air suction, the gas of pump housing inner cavity 11 to flowing out on the outside of the pump housing 1, and the diameter of the pump housing 1 it is bigger, Revolving speed is higher, then centrifugal force and hypobaric suction are bigger.In the vacuum tank communicated inside vacuum pump and with vacuum pump Gas is discharged faster, and the air pressure in container also declines faster therewith.Therefore it can need to set the pump housing depending on the application The required purpose vacuumized can be realized in diameter and revolving speed.
In order to obtain higher vacuum degree, air is discharged step by step, meets wider array of use scope for realization, as shown in figure 3, this Embodiment additionally provides a kind of multistage vacuum pump being composed in series by above-mentioned multiple (being three in figure) vacuum pumps, and each vacuum pump is put It sets in respective closing shell 7, shaft 2 is supported on the shell 7 and (can also be supported in above-mentioned rack, rack is placed on In shell), and air inlet 22 exposes to the shell 7, is then provided on shell 7 and the gas of exhaust outlet 13 is discharged in outside shell 7 Gas outlet 71 is then provided with connecting tube 8 between adjacent shell, the latter shell in 8 one end of connecting tube and adjacent housings Gas outlet 71 is connected, the air inlet on the other end of the connecting tube and the shaft 2 for exposing to previous shell 7 in adjacent housings 7 22 are connected.Though have shell at this time, due to being only used to collect the gas come out by exhaust outlet, gap between the pump housing compared with Greatly preferably, it is not necessarily to very high machining accuracy, thus integral manufacturing is convenient, still has processing cost low, the simple feature of structure.
The course of work of the multistage vacuum pump is illustrated by taking Fig. 3 as an example: first by the vacuum tank for needing to vacuumize and most The air inlet of the latter (third) vacuum pump is connected, and then starts the motor of three vacuum pumps, makes the pump housing 1 of each vacuum pump It is rotated with respective shaft 2, principle as previously described, latter vacuum pump delivers gas to the air inlet of adjacent previous vacuum pump Mouthful, in this way, gas in the vacuum tank being connected with multistage vacuum pump 6 is discharged step by step, to obtain higher vacuum degree.It is more Grade vacuum pump Pumping characterization it is related with the diameter and revolving speed of the quantity of vacuum pump and each pump housing, therefore can according to Way needs to set the quantity of vacuum pump and the diameter of each pump housing and revolving speed.

Claims (10)

1. a kind of vacuum pump, including the pump housing (1) with inner cavity (11) and through the shaft (2) at the pump housing (1) center, the pump The exhaust passage (12) of connection inner cavity (11) is provided in body (1), the exhaust outlet (13) of the exhaust passage (12) is located at the pump housing (1) On outer wall, it is characterised in that: the pump housing (1) and shaft (2) are rigidly connected and can rotate with the shaft (2), and described turns The inlet channel (21) for being connected to the inner cavity (11) of the pump housing, air inlet (22) position of the inlet channel (21) are provided in axis (2) In on the end face of the shaft (2).
2. vacuum pump according to claim 1, it is characterised in that: the exhaust passage (12) is located at mutually to be hung down with shaft (2) In straight plane.
3. vacuum pump according to claim 2, it is characterised in that: the exhaust passage (12) by the pump housing (1) inner cavity (11) the lateral round and smooth extension in exhaust outlet (13) side, and extending direction is opposite with shaft (2) direction of motion.
4. vacuum pump according to claim 2, it is characterised in that: the pump housing (1) is by main body (1A) and pump cover (1B) Assemble, the inner cavity (11) and exhaust passage (12) are located between main body (1A) and the joint surface of pump cover (1B), and in institute State the gasket being equipped between main body and the joint surface of pump cover (1B) for sealing the inner cavity (11) and exhaust passage (12) (3)。
5. vacuum pump according to claim 4, it is characterised in that: the inner cavity (11) and exhaust passage (12) are by being provided with Towards on the end face of the main body of pump cover (1B) groove and pump cover (1B) cover.
6. vacuum pump according to any one of claims 1 to 5, it is characterised in that: the exhaust passage (12) Have multiple, the circumferential direction along the pump housing (1) is uniformly arranged respectively.
7. vacuum pump according to any one of claims 1 to 5, it is characterised in that: the inlet channel (21) by One axial passage (21A) to connect with air inlet and multiple radial passages (21B) composition, each radial passage are connected to institute State inner cavity (11) and axial passage (21A).
8. vacuum pump according to any one of claims 1 to 5, it is characterised in that: the pump housing (1) and shaft (2) sealing ring (5) are provided between contact portion.
9. vacuum pump according to any one of claims 1 to 5, it is characterised in that: shaft (2) the both ends support On rack (4).
10. a kind of multistage vacuum pump includes multiple vacuum pumps as described in claim 1 to 9 any claim, feature Be: each vacuum pump is placed in respective closing shell (7), and the air inlet (22) on the shaft (2) exposes to this Shell (7) is then provided on the shell (7) and the gas of the exhaust outlet (13) is discharged in the gas outlet (71) outside shell, phase Connecting tube (8) are then provided between adjacent shell, the gas outlet phase of connecting tube (8) one end and the latter shell in adjacent housings Even, the other end of the connecting tube (8) is connected with the air inlet in the shaft (2) for exposing to previous shell in adjacent housings.
CN201820351575.1U 2018-03-15 2018-03-15 A kind of vacuum pump and its multistage vacuum pump Expired - Fee Related CN208236647U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820351575.1U CN208236647U (en) 2018-03-15 2018-03-15 A kind of vacuum pump and its multistage vacuum pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820351575.1U CN208236647U (en) 2018-03-15 2018-03-15 A kind of vacuum pump and its multistage vacuum pump

Publications (1)

Publication Number Publication Date
CN208236647U true CN208236647U (en) 2018-12-14

Family

ID=64587916

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820351575.1U Expired - Fee Related CN208236647U (en) 2018-03-15 2018-03-15 A kind of vacuum pump and its multistage vacuum pump

Country Status (1)

Country Link
CN (1) CN208236647U (en)

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GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20181214

Termination date: 20200315

CF01 Termination of patent right due to non-payment of annual fee