CN2821225Y

CN2821225Y - Rotor pump

Info

Publication number: CN2821225Y
Application number: CN 200520074753
Authority: CN
Inventors: 吴永祥; 徐学忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-17
Filing date: 2005-08-17
Publication date: 2006-09-27
Anticipated expiration: 2015-08-17

Abstract

The utility model relates to a rotor pump, which is used for devices used in machinery industry, chemical industry, food industry, etc. and is used as a power device for conveying lubricating liquid, cooling liquid and high-viscosity liquid. The utility model comprises a pump body provided with a rotation chamber of an outer rotor, an outer rotor, an inner rotor and a pump cover, wherein the chamber bottom of the rotation chamber of the outer rotor is provided with a pair of oil inlet and oil outlet chambers, and the oil inlet and the oil outlet chambers are respectively communicated with an oil inlet and an oil outlet holes arranged on the side part of the pump body; the outer rotor is contained in the rotation chamber of the outer rotor, and the center of the outer rotor is provided with an oil suction and discharge chamber communicated with the oil inlet and the oil outlet chambers; the inner rotor is arranged in the oil suction and discharge chamber, and is provided with rotor teeth and an eccentric shaft; the pump cover is arranged on the pump body. The oil suction and discharge chamber of the outer rotor forms tooth grooves for the rotor teeth of the inner rotor to match with the outer rotor, and an arc-shaped outer rotor tooth is respectively formed between every adjacent tooth grooves; the quantity of the tooth grooves and the outer rotor teeth are respectively four, and the quantity of the outer teeth is three. The utility model has the advantages of simple structure, easy processing and assemblage, small size, large flux and long service life, and the utility model can not be limited by an application area.

Description

A kind of rotor pump

Technical field

The utility model relates to a kind of rotor pump, is widely used on the employed equipment of industry such as machinery, chemical industry, food, as a kind of power plant of carrying such as Lubricants, cooling liquid, high viscosity liquid.

Background technique

Rotor pump is crescent gear pump, and this type of pump mainly contains two kinds of structural types, the one, involute gear pump; Another is a cycloid gear pump.Involute gear pump is mainly used in the lubrication system and low-pressure hydraulic system of lathe, and the existing deficiency of this pump shows as: the one, and discharge capacity is subjected to the restriction of boundary dimension, the discharge capacity q=6.66Z of involute gear pump _pm ²B, wherein, Z _pFor the gear number of teeth, m are that modulus, b are the facewidth.As seen, increasing modulus m and facewidth b can increase the discharge capacity of involute gear pump, but are subjected to installing the restriction that allows the space because of the boundary dimension of the pump housing can increase thereupon.If, increase the discharge capacity that the teeth groove spacing improves involute gear pump to reduce gear number of teeth Zp, can cause the distortion and the undercut of gear profile so, this method is obviously inadvisable; The 2nd, structure is comparatively complicated, and for example, outer teeth profile is involute shape in the involute gear pump, and the profile of tooth complexity not only need be processed by special process equipment, and required precision is very harsh, and is as the same for the desired assembly precision of assembling.And for example, need between small gear and the internal gear oil sucting cavity and pumping cavity to be separated, cause the parts showed increased by means of a dividing plate; The 3rd, exist to leak and to cause volumetric efficiency low, the pressure oil of the hyperbaric chamber of involute gear pump is easily by the gap of top circle and pump housing endoporus and the clearance leakage between gear and the pump cover, thereby not only can reduce volumetric efficiency, and delivery pressure also is not easy to improve.

Cycloid gear pump is mainly used in the lubrication system of lathe, the deficiency that this pump showed mainly contains: the one, and volume is subjected to the restriction of installing space greatly, because modern machinery and equipment is more and more towards compact structure, the direction that boundary dimension is little develops, for example the structure itself of numerical control machine tool, textile manufacturing machine equipment is very compact, thereby makes existing cycloid gear pump can't adapt to the requirement that boundary dimension is little, flow is big; The 2nd, processing and assembling required precision harshness, the flank profil of its internal rotor adopts the equidistant curve of complete curtate epicycloid, and the flank profil of external rotor adopts and its circular arc profile of gripping altogether, and each tooth of inside and outside rotor is in the engagement contact condition all the time in engagement process.Therefore, not only all high for machining accuracy, the matching requirements of inside and outside rotor, but also increase cost of production.If in processing and assembly process, error occurs, can cause flank profil engagement place stress to strengthen so, aggravation profile wear, the working life of shortening pump.The 3rd, application area is restricted, and is more because of the inside and outside rotor number of teeth, the teeth groove spacing is little, flow area is little in the pump housing, thereby is not suitable for flowing of high viscosity liquid, and therefore this pump should not be used as the power plant that high viscosity liquid is provided.

Summary of the invention

Task of the present utility model be to provide a kind of simple in structure, processing and assembling easily, volume is little, flow greatly, is not subjected to application area restriction and long service life rotor pump.

Task of the present utility model is finished like this, a kind of rotor pump, the pump housing 1 that comprises a tool external rotor rotary chamber 13, be a pair of separate at the bottom of the chamber of external rotor rotary chamber 13 into and out of

oil pocket

18,14, into and out of

oil pocket

18,14 respectively be opened in communicating of the pump housing 1 sidepiece into and out of

oilhole

17,15; One external rotor 2 is contained in the external rotor rotary chamber 13, its central tool and the described suction oil pocket 21 that communicates into and out of

oil pocket

18,14; One internal rotor 3 places described suction oil pocket 21, tool rotor tooth 31 and eccentric shaft 32; One pump cover 4, lid is fixed on the pump housing 1, the suction oil pocket 21 of described external rotor 2 is formed with the rotor tooth 31 associated teeth groove 211 that are used for for internal rotor 3, constitute the outer rotor teeth 212 of arcuation between the adjacent sheaves 211, described teeth groove 211 and outer rotor teeth 212 respectively have 4, and described rotor tooth 31 has 3.

4 teeth groove 211 described in the utility model are crossing distribution on suction oil pocket 21, are distributed on the internal rotor 3 and described 3 rotor tooths 31 are man type.

The utility model is concaved with seal groove 12 at the described pump housing 1 and the pump cover 4 solid end surfaces that matches, and is embedded with on the seal groove 12 between the external rotor rotary chamber 13 that is used to ensure pump cover 4 and the pump housing 1 to constitute the seal ring 121 that seals.

Seal ring 121 described in the utility model is a rubber ring.

The utility model is owing to adopted said structure, obvious part count is few, simple in structure, help processing and assembling, overall volume obtains littleization, and reduce the wearing and tearing probability on flank profil surface by reducing the number of teeth, not only be beneficial to the working life that prolongs pump, also can increase the lifting rate of per unit volume, high viscosity liquid is not had fastidious property.

Description of drawings

Fig. 1 is the assembling assumption diagram of the utility model rotor pump.

Fig. 2 is the sectional view of the utility model rotor pump.

Fig. 3 is the A-A sectional view of Fig. 2.

Embodiment

In Fig. 1 and Fig. 2, the bottom of the pump housing 1 is expanded and to be established, establish the face-to-face both sides at position in expansion and offer respectively into and out of

oilhole

17,15, into and out of

oilhole

17,15 respectively with separate the communicating that is opened in external rotor rotary chamber 13 bottoms into and out of oil pocket 18,14.The effect that the mounting hole 16 at position is established in the expansion that is opened in the pump housing 1 is to be used for the utility model is installed to according to needing mechanically.External rotor 2 rotatably is contained in the external rotor rotary chamber 13 of the pump housing 1, its suction oil pocket 21 with communicate into and out of

oil pocket

18,14, described teeth groove 211 is to be formed by suction oil pocket 21 narrow contracting, and is crossing distribution on the whole.Can be clear that by Fig. 1 to constitute outer rotor teeth 212 between the adjacent sheaves 211, because of teeth groove 211 has 4, also 4 of tools of outer rotor teeth 212 then.Why the claimant preferably selects 4 teeth groove 211 and constitutes 4 outer rotor teeth 212 by this, is to be minimum a kind of of the number of teeth in the rotor pump because the quantity of the quantity of this outer rotor teeth 212 and the rotor tooth of selecting 31 is crescent gear pumps.After internal rotor 3 is set in the suction oil pocket 21 of external rotor 2, one end of its eccentric shaft 32 promptly by state shown in present Fig. 1,2 or the left end of position shown in claiming passing through the axis hole 19 that defaults in external rotor rotary chamber 13 bottoms in regular turn and be attached to the axis hole 61 that the pump housing 1 expands the sealing cover 6 of establishing bottom portion, this axle head that passed through the position is used for connecting with power such as motor; The other end of eccentric shaft 32 is that right-hand member then is bearing on the rotor shaft hatch 42 that defaults in pump cover 4 central authorities.In order to ensure the location of described sealing cover 6, also have additional jump ring 7.Described pump cover 4 revolve after by the screw hole 41 of screw 5 on passing through pump cover 4 and the screw 11 to the pump housing 1 in realize fixing with the pump housing 1, and ensure sealing effect between the pump cover 4 and the pump housing 1 by seal ring 121.Because the core of the utility model structure shows the teeth groove 211 of external rotor 2, constituting component between the rotor tooth 31 of outer rotor teeth 212 and internal rotor 3, therefore in design process, be objective function with the peak rate of flow, to guarantee that certain boundary dimension is constraint conditio, eccentric distance to internal rotor 3, the modulus of circle-arc tooth, curtate ratio, arc footpath coefficient etc. is all optimized, and as can be known by schematic structure, the centrifugal power that internal rotor 3 is produced when high speed rotating helps to be full of between cog, can not produce hole and entrap phenomenon, and along with the raising of rotating speed, its flow, plot ratio also can be ultimate attainment raising.See that again rotor tooth 31 numbers of teeth are few, and the slot pitch of the teeth groove 211 of external rotor 2 is big, thereby the circulation area of liquid in the pump housing 1 improved, very be beneficial to transfer of highly viscous liquid.

The claimant sketches working principle of the present utility model in conjunction with Fig. 3, by power such as 32 rotations of driven by motor eccentric shaft, take internal rotor 3 rotations by eccentric shaft 32, in the rotary course of internal rotor 3, external rotor 2 is also with revolving, and specifically is that outer rotor teeth 212 that the rotor tooth 31 by internal rotor 3 promotes external rotors 2 embodies and makes external rotor 2 rotations.In the process of inside and

outside rotor

2,3 rotations, into and out of

oilhole

17,15 oil-feeds constantly and fuel-displaced, be example with state shown in scheming, enter chamber 21a and show as oil or claim the state that liquid enters; And compression chamber 21b shows as oil or claims liquid compressed state; Discharge side 21c shows as oil or claims the state that liquid is discharged from, and realizes continual oil-feed, oil extraction so again and again.By above-mentioned whole action as can be known, in rotor tooth 31 and process that outer rotor teeth 212 is meshed each other, in a certain corner area, be out-of-gear, thereby the simultaneously ingear number of teeth is reduced, be beneficial to wearing and tearing that reduce the flank profil surface and the working life that prolongs pump, the discharge capacity of per unit volume is increased.

Claims

1, a kind of rotor pump, the pump housing (1) that comprises a tool external rotor rotary chamber (13), be a pair of separate at the bottom of the chamber of external rotor rotary chamber (13) into and out of oil pocket (18), (14), into and out of oil pocket (18), (14) respectively be opened in communicating of the pump housing (1) sidepiece into and out of oilhole (17), (15); One external rotor (2) is contained in the external rotor rotary chamber (13), its central tool and the described suction oil pocket (21) that communicates into and out of oil pocket (18), (14); One internal rotor (3) places described suction oil pocket (21), tool rotor tooth (31) and eccentric shaft (32); One pump cover (4), lid is fixed on the pump housing (1), the suction oil pocket (21) that it is characterized in that described external rotor (2) is formed with the associated teeth groove of rotor tooth (31) (211) that is used for for internal rotor (3), constitute the outer rotor teeth (212) of arcuation between the adjacent sheaves (211), described teeth groove (211) and outer rotor teeth (212) respectively have 4, and described rotor tooth (31) has 3.

2, rotor pump according to claim 1 is characterized in that described 4 teeth groove (211) are crossing distribution on suction oil pocket (21), is distributed on the internal rotor (3) and described 3 rotor tooths (31) are man type.

3, rotor pump according to claim 1, it is characterized in that being concaved with seal groove (12), be embedded with on the seal groove (12) between the external rotor rotary chamber (13) that is used to ensure pump cover (4) and the pump housing (1) and constitute the seal ring (121) that seals at the described pump housing (1) and pump cover (4) the solid end surfaces that matches.

4, rotor pump according to claim 3 is characterized in that described seal ring (121) is a rubber ring.