CN209724667U - The rotor assembly and electronic vacuum pump of electronic vacuum pump - Google Patents

Abstract

The utility model discloses a kind of rotor assembly of electronic vacuum pump, it is characterized by comprising the rotors that cross-sectional shape is oval, centre bore is equipped in the rotor, the ring gear of an annular is equipped in the centre bore, the lateral wall of the ring gear and the hole inner wall of centre bore connect, it is evenly distributed with several driven tooths on the inner sidewall of ring gear, end positions corresponding to the long axis direction on the lateral wall of the rotor along itself cross section are covered at least one layer of graphite linings.The utility model provides a kind of rotor assembly of electronic vacuum pump, good reliability, without adding lubricating oil, and for rotor also without the limitation in revolving speed section, therefore it is versatile.

Description

The rotor assembly and electronic vacuum pump of electronic vacuum pump

Technical field

The utility model relates to the technical field of vacuum pump, the specifically rotor assembly and electricity of a kind of electronic vacuum pump Sub- vacuum pump.

Background technique

Vacuum pump is using a kind of more universal pump in modern industrial production, and existing electronic vacuum pump uses more Structure be sliding-vane pump, but the generally existing following technical problem of existing sliding-vane pump:

1, blade is easy to kill, and functional reliability is poor, sensitive to oil contamination, therefore it is required that working environment is clean, oil liquid It is required that stringent filtering；

2, the required precision of components is high；

3, vane pump needs to drive blade to be resisted against on stator inner surface using centrifugal force, therefore can not be suitable for the slow-speed of revolution The case where.

Summary of the invention

First technical problem to be solved in the utility model is: a kind of rotor assembly of electronic vacuum pump is provided, Its good reliability, without adding lubricating oil, and for rotor also without the limitation in revolving speed section, therefore it is versatile.

Technical solution adopted in the utility model is: providing a kind of rotor assembly of electronic vacuum pump, feature exists In: including the rotor that cross-sectional shape is oval, it is equipped with centre bore in the rotor, an annular is equipped in the centre bore Ring gear, the lateral wall of the ring gear and the hole inner wall of centre bore connect, and are evenly distributed on the inner sidewall of ring gear several Driven tooth, end positions corresponding to the long axis direction on the lateral wall of the rotor along itself cross section are covered at least one layer Graphite linings.

After using the above structure, a kind of rotor assembly of electronic vacuum pump of the utility model has compared with prior art Have the advantage that the rotor firstly, since ellipse, the lateral wall that the both ends on long axis direction are located on rotor can be with Pump chamber is directly tangent, there is no need to which slide plate is arranged, also avoids the case where blade is killed in conventional sliding-vane pump, secondly, utilizing Self-lubricating may be implemented in graphite linings on rotor, there is no need to which lubricating oil is arranged, also with regard to the problem of there is no oil filtratings, most Afterwards, due to tangent with pump chamber inner sidewall always at the top of the arc of rotor, rotor can realize high pressure sky under any revolving speed The pumping of gas eliminates limitation of the existing vane pump for rotor speed, versatile.

Preferably, the graphite linings are multilayer.The design of Multi-layer graphite layer, can be during rotor be modified, will The outer layer graphite linings of damaged surfaces remove, so that rotor second layer graphite linings are continued to use as outer layer graphite linings, thus The recycling rate of waterused for improving rotor, the case where directly being scrapped after avoiding the graphite linings on rotor from damaging.Certain above-mentioned removal outer layer Necessarily dimensional profile is caused to change after graphite linings, this rotor can be made to use as the small size pump chamber of same model at this time, Or prepare one layer of graphite linings again again in second layer graphite linings and used as original pump chamber, it is only necessary to repair in the process Multiple outer layer graphite linings, therefore repair process process is few, process is simple.

Preferably, the graphite linings circumferentially extending to the lateral wall for covering entire rotor along rotor.

Preferably, tight fit between the hole inner wall of centre bore on the lateral wall and rotor of the ring gear.

Preferably, during the ring gear described in when ring gear is along axial be fitted into the centre bore of rotor is circumferentially limited in In heart hole.

Further, the lateral wall of the ring gear is equipped with protrusion, and the hole inner wall of the centre bore is equipped with and protrusion The groove matched.

Second technical problem to be solved in the utility model is: providing a kind of electronic vacuum pump, reliability of structure It is good, without adding lubricating oil, and for rotor also without the limitation in revolving speed section, therefore it is versatile.

Technical solution adopted in the utility model is: providing a kind of electronic vacuum pump, it is characterised in that: including pump case, Pump case is equipped with driving shaft, and working chamber is equipped in pump case, is equipped with driving wheel in the working chamber, the driving shaft penetrates in pump case And connect with driving wheel, the rotor is placed in working chamber, and on the outside of the driven tooth on the ring gear of rotor and driving wheel Active tooth engagement on wall, the inner sidewall of the working chamber are bent so that the rotor is turned to driving wheel in the horizontal direction Rotor both ends corresponding to the length direction are tangent with the inner sidewall of working chamber respectively when any position.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of the rotor assembly of electronic vacuum pump of the utility model.

Fig. 2 is the partial enlargement diagram in region " A " in Fig. 1.

Fig. 3 is the assembling structure schematic diagram that rotor assembly is fitted into electronic vacuum pump.

Wherein:

100, rotor, 101, arc top, 102, side portion, 103, centre bore, 104, ring gear, 105, driven tooth, 106, Graphite linings, 107, isolation film, 108, protrusion；

200, pump case, 201, working chamber；

300, driving shaft；

400, driving wheel, 401, driving tooth.

Specific embodiment

The utility model is described in further detail with reference to the accompanying drawings and detailed description.

Basic embodiment:

The utility model provides a kind of rotor assembly of electronic vacuum pump, including the rotor that cross-sectional shape is oval 100, the rotor 100 includes being located at the arc top 101 of two ends corresponding to the long axis direction of cross section and being located at short Two side portions 102 corresponding to axis direction, 101 and two side portions 102 are arranged alternately and any one arc at the top of two arcs Transition connects between top 101 and adjacent side portion 102, thus constitutes the rotor 100 of entire ellipsoidal structure.The rotor 100 geometric center position is equipped with centre bore 103, the center of circle of centre bore 103 and the axis line overlap of rotor 100.The center It is equipped with the ring gear 104 of an annular in hole 103, two end faces of ring gear 104 and corresponding end face on rotor 100. The lateral wall of the ring gear 104 is connect with the hole inner wall of centre bore 103, and is evenly distributed on the inner sidewall of ring gear 104 Several driven tooths 105, the rotor 100, which is located on the lateral wall where 101 at the top of arc, is covered at least one layer of graphite linings 106.

Embodiment one:

Its structure and above-mentioned basic embodiment are essentially identical, and difference is: the graphite linings 106 are multilayer, arbitrary neighborhood It is bonded between two layers of graphite linings 106 by isolation film 107.

As a kind of improvement of embodiment one, as shown in Fig. 2, the graphite linings 106 are two layers, inside and outside two layers of graphite linings Between be isolated and be adhered to each other by isolation film 107, the preparation of internal layer graphite linings 106 is on the lateral wall of rotor 100, tool Body the internal layer graphite linings 106 preparation at the top of the arc of rotor 100 on 101 lateral wall.

Another kind as embodiment one improves, and Multi-layer graphite layer 106 sequentially stacks, and between adjacent graphite linings 106 Pass through the direct integral molding of sintering process.That is graphite linings blank sequentially stacks, and then passes through sintering furnace integral type sinter molding, Certainly it is not excluded for the preparation molding that other conventional graphite linings preparation processes realize Multi-layer graphite layer.

Embodiment two:

Its structure and basic embodiment are essentially identical, and difference is: the graphite linings 106 are prolonged along the circumferential direction of rotor 100 Extend to the lateral wall for covering entire rotor 100.I.e. above-mentioned arc top 101 and side portion 102 are all the integral types on rotor 100 The definition of certain a part of structure, therefore the lateral wall of rotor 100 is still continuously, the both ends of graphite linings 106 are along rotor 100 Circumferentially extending to joining end to end so that graphite linings 106 cover the lateral wall of entire rotor 100.Using such rotor Structure, rotor 100 can use the alloy of better performances, and rotor 100 and pump chamber may be implemented using graphite linings 106 Self-lubricating realizes oil-free lubrication without the addition of lubricating oil.

Certainly, the rotor 100 can also be made of entire graphite material, but due to the ductility of graphite material It is poor and more crisp, therefore cause poor in rotor performance, but for some specific occasions, such as the vacuum pump of the slow-speed of revolution can To use this embodiment.

Embodiment three:

Its structure and basic embodiment are essentially identical, and difference is: the lateral wall and rotor 100 of the ring gear 104 Tight fit between the hole inner wall of upper centre bore 103.

Example IV:

Its structure and basic embodiment are essentially identical, and difference is: when ring gear 104 is fitted into rotor 100 along axial Ring gear 104 described in when in heart hole 103 is circumferentially limited in centre bore 103.

Embodiment five:

Its structure is essentially identical with example IV, and difference is: the lateral wall of the ring gear 104 is equipped with protrusion 108, The hole inner wall of the centre bore 103 is equipped with the groove matched with protrusion 108.

Embodiment six:

Its structure is essentially identical with example IV, and difference is: the cross section of the centre bore 103 is ellipse, described The lateral wall of ring gear 104 is matched with centre bore 103.

Embodiment seven:

Its structure is essentially identical with example IV, and difference is: the inner sidewall of the centre bore 103 and ring gear 104 Lateral wall surrounds to form a pin hole, the certain position pin of insertion in the pin hole.

The utility model provides a kind of electronic vacuum pump, it is characterised in that: including pump case 200, pump case 200 is equipped with actively Axis 300, pump case 200 is interior to be equipped with working chamber 201, is equipped with driving wheel 400 and rotor 100, the rotor in the working chamber 201 100 can be any one structure in above-described embodiment, and the driving shaft 300 penetrates in pump case 200 and connects with driving wheel 400 It connects, and the driven tooth 105 on the ring gear 104 of rotor 100 is engaged with the driving tooth 401 on 400 lateral wall of driving wheel, it is described The inner sidewall of working chamber 201 is bent so that the rotor 100 turns to any position when institute with driving wheel 400 in the horizontal direction It is tangent with the inner sidewall of working chamber 201 respectively to state the both ends corresponding to the length direction of rotor 100.I.e. rotor 100 rotates Be located on the lateral wall of the rotor 100 when to any position region where 101 at the top of two arcs respectively with working chamber 201 Inner sidewall is constant tangent.

The utility model preferred embodiment is described above, but is not to be construed as limiting the scope of the invention. The utility model is not only limited to above embodiments, and specific structure is allowed to vary, all in the utility model demand for independence Made various change is within the protection scope of the present utility model in protection scope.

Claims (7)

1. a kind of rotor assembly of electronic vacuum pump, it is characterised in that: including the rotor that cross-sectional shape is oval (100), centre bore (103) are equipped in the rotor (100), the ring gear of an annular is equipped in the centre bore (103) (104), the lateral wall of the ring gear (104) is connect with the hole inner wall of centre bore (103), on the inner sidewall of ring gear (104) It is evenly distributed with several driven tooths (105), corresponding to the long axis direction on the lateral wall of the rotor (100) along itself cross section End positions be covered at least one layer of graphite linings (106).

2. the rotor assembly of electronic vacuum pump according to claim 1, it is characterised in that: the graphite linings (106) are Multilayer.

3. the rotor assembly of electronic vacuum pump according to claim 1, it is characterised in that: the graphite linings (106) Circumferentially extending along rotor (100) is to the lateral wall for covering entire rotor (100).

4. the rotor assembly of electronic vacuum pump according to claim 1, it is characterised in that: the ring gear (104) Lateral wall and rotor (100) on centre bore (103) hole inner wall between tight fit.

5. the rotor assembly of electronic vacuum pump according to claim 1, it is characterised in that: when ring gear (104) is along axis To the centre bore (103) for being packed into rotor (100) when interior described in ring gear (104) be circumferentially limited in centre bore (103).

6. the rotor assembly of electronic vacuum pump according to claim 5, it is characterised in that: the ring gear (104) Lateral wall is equipped with raised (108), and the hole inner wall of the centre bore (103) is equipped with the groove matched with raised (108).

7. a kind of electronic vacuum pump, it is characterised in that: including pump case (200), pump case (200) is equipped with driving shaft (300), pump case (200) working chamber (201) are equipped in, are equipped with driving wheel (400) in the working chamber (201), the driving shaft (300) penetrates pump It is connect in shell (200) and with driving wheel (400), the rotor (100) in any one of the claims 1 to 6 is placed in work In chamber (201), and the driven tooth (105) on the ring gear (104) of rotor (100) and the active on driving wheel (400) lateral wall Tooth (401) engagement, the inner sidewall of the working chamber (201) are bent so that the rotor (100) with driving wheel in the horizontal direction (400) turn to when any position the rotor (100) both ends corresponding to the length direction respectively with working chamber (201) Inner sidewall it is tangent.