CN102943755A

CN102943755A - Rotor pump

Info

Publication number: CN102943755A
Application number: CN2012104550567A
Authority: CN
Inventors: 聂如国
Original assignee: NINGBO DURREX PUMPS CO Ltd
Current assignee: NINGBO DURREX PUMPS CO Ltd
Priority date: 2012-11-13
Filing date: 2012-11-13
Publication date: 2013-02-27
Anticipated expiration: 2032-11-13
Also published as: CN102943755B

Abstract

The invention discloses a rotor pump, comprising a gear box (1), a pump body, a pump cover, a rear box cover, two rotary shafts (2), two cam rotors (3) and two gears, wherein the two rotary shafts (2) are respectively and rotatably connected with a hole of the corresponding gear box (1); the rotary shafts (2) located at the two ends of the hole are respectively sleeved with bearings (4) and end covers (5); each end cover (4) and the gear box (1) are detachably connected; each end cover (5) is used for matching the corresponding bearing (4) between the corresponding rotary shaft (2) and the gear box (1) in a pressing manner; and each end cover (1) is provided with an axial adjusting structure. The rotor pump has the advantages of simplicity in machining, reduction of assembling difficulty and improvement of assembling precision.

Description

Rotor pump

Technical field

The present invention relates to the transfer pump technical field, specifically is a kind of rotor pump.

Background technique

Rotor pump belongs to displacement pump.It is that periodicity by means of a plurality of fixed volume convey unit in the active chamber is converted and reaches the purpose of carrying fluid.

Present rotor pump comprises gear-box, the pump housing, pump cover, back box lid, main shaft, countershaft, two cam followers, the first gear, the second gear; The described pump housing is fixed on a side of gear-box, described back box lid is fixed on the opposite side of gear-box, described two cam followers are located in the cavity of the pump housing and pump cover formation, and described the first gear and the second gear intermesh and be contained in the cavity of back box lid and gear-box formation.

Described main shaft and countershaft are contained in the gear-box by bearing separately, and two bearings and the end cap that pass through separately of main shaft and countershaft be installed in mounting hole two ends in the gear-box, and two bearings are fixed with end cap respectively again.More than the rotor pump of this structure have following shortcoming: rotor pump is when assembling, first with main shaft, countershaft and supporting tapered roller bearing, front and rear cover is fixed in the gear-box, the end face of the step hole of the end face of front and rear cover and gear-box offsets at this moment, and then two rotors are installed, the front/rear end of two rotors all needs the gap according to technical requirements assurance and the pump housing and pump cover, after but front and rear cover compresses main shaft and countershaft, can't adjust again, even adding man-hour, guarantee precision and the tolerance of each component, but because tapered roller bearing is market purchasing, can't guarantee its consistency of thickness, thereby two rotor end-face gaps after causing assembling can't guarantee.Like this if adjust, then front and rear cover can only be dismantled, again end face and the step surface of end cap are carried out disposable clamping and disposable processing, again assembling after the processing, and also differ and meet the demands surely after the assembling after the time processing, can only carry out second time or for the third time, make like this processed complex, also increase simultaneously assembling difficulty, reduced assembly precision.

Summary of the invention

The technical problem to be solved in the present invention is that a kind of simple, as to reduce assembling difficulty, raising assembly precision rotor pump of processing is provided.

Technological scheme of the present invention is, a kind of rotor pump with following structure is provided, and comprises gear-box, the pump housing, pump cover, back box lid, two rotating shafts, two cam followers, two gears; Described two rotating shafts are rotatably connected on respectively the hole of corresponding teeth roller box, are positioned in the rotating shaft at two ends in hole to be socketed with respectively bearing and end cap, and each end cap is connected with gear-box is removable, and each end cap is force-fitted in the bearing of correspondence between rotating shaft and the gear-box; Described end cap is provided with axial adjustment structure.

Described end cap is provided with axial adjustment structure and refers to, described end cap is provided with and is positioned at concentrically ringed tapped hole more than two and two, and described tapped hole is symmetrical along the circumference of end cap, and each tapped hole is combined with the bolt that can offset with the end face in the hole of gear-box.

Each end cap refers to that with removable connection of gear-box bolt connects the center of described tapped hole and being centered close on the concentric circle of the bolt mounting holes on the end cap.

Described tapped hole is four, and distributes along even circumferential.

After adopting above structure, the present invention compared with prior art, have the following advantages: because described end cap is provided with axial adjustment structure, the bolt of namely setting up two or more tapped holes and matching at end cap, when adjusting the gap of cam, can turn the bolt on the end cap of two ends, adjust the end cap move left and right, again end cap and gear-box are fixed after having adjusted, need not like this to dismantle end cap again processes and assembles, once finely tune after the assembling and can guarantee requirement, make and process simply, reduce assembling difficulty, raising assembly precision.

As improvement, the removable connection of each end cap and gear-box refers to that bolt connects, being centered close on the concentric circle of the center of described tapped hole and the bolt mounting holes on the end cap, make accept more even, the join strength height.

Description of drawings

Accompanying drawing 1 is the structural representation of rotor pump of the present invention.

Accompanying drawing 2 is the front cover structural representation of rotor pump of the present invention.

Accompanying drawing 3 is the A-A generalized section of Fig. 2.

Accompanying drawing 4 is the rear end cover structure schematic representation of rotor pump of the present invention.

Accompanying drawing 5 is the B-B generalized section of Fig. 2.

As shown in the figure: 1, gear-box, 2, rotating shaft, 3, rotor, 4, bearing, 5, end cap, 5.1, tapped hole, 5.2, bolt mounting holes, 6, bolt.

Embodiment

The invention will be further described below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, rotor pump of the present invention comprises gear-box 1, the pump housing, pump cover, back box lid, two rotating shafts 2, two cam followers, two gears 3; Described two rotating shafts 2 are applied in respectively the hole of corresponding teeth roller box 1, and are positioned in the rotating shaft 2 at two ends in hole and are socketed with respectively bearing 4 and end cap 5, each end cap 5 and 1 removable connection of gear-box; Each end cap 5 is force-fitted in the bearing 4 of correspondence between rotating shaft 2 and the gear-box 1, the inner ring of bearing 4 and rotating shaft close-fitting, and outer ring and gear-box 1 inwall close-fitting, described end cap 1 is provided with axial adjustment structure.Described bearing 4 is tapered roller bearing.

Described end cap 1 is provided with axial adjustment structure and refers to, described end cap 5 is provided with and is positioned at concentrically ringed tapped hole 5.1 more than two and two, namely all tapped holes 5.1 are positioned on the circumference in the same center of circle, described tapped hole 5.1 circumference are symmetrical, and each tapped hole 5.1 is combined with the bolt 6 that can offset with the end face in the hole of gear-box 1.

Each end cap 5 refers to that with 1 removable connection of gear-box bolt connects, and the center line of the bolt mounting holes 5.2 on the center of described tapped hole 5.1 and the end cap 5 is positioned on the concentric circle.

Described tapped hole 5.1 is four, and distributes along even circumferential.

End cap 5 is divided into front cover and rear end cover, such as Fig. 2, shown in Figure 3, is the front cover of rotor pump, comprises the front cover body, is provided with the bolt mounting holes 5.2 that passes for bolt and the tapped hole 5.1 that screws bolt at the front cover body, screws bolt 6 at tapped hole 5.1.Such as Fig. 4, shown in Figure 5, be the rear end cover of rotor pump, comprise the front cover body, be provided with the bolt mounting holes 5.2 that passes for bolt and the tapped hole 5.1 that screws bolt at the rear end cover body, screw bolt 6 at tapped hole 5.1.

Assemble according to conventional method first, when waiting rotor to need the adjusting play, the construction bolt of loosening a little end cap 5 and gear-box is followed adjusting bolt 6 first, namely turns bolt 6, until after meeting the requirements, lock construction bolt again.

Below only use better example with regard to the present invention and made explanation, but can not be interpreted as it is limitations on claims, the structure of the technology of the present invention can have other variations, is not limited to said structure, can be three, four etc. such as supporting tapped hole and bolt.In a word, all various variations of doing in the protection domain of independent claims of the present invention are all in protection scope of the present invention.

Claims

1. a rotor pump comprises gear-box (1), the pump housing, pump cover, back box lid, two rotating shafts (2), two cam followers (3), two gears; Described two rotating shafts (2) are rotatably connected on respectively the hole of corresponding teeth roller box (1), be positioned in the rotating shaft (2) at the two ends in hole and be socketed with respectively bearing (4) and end cap (5), each end cap (5) and removable connection of gear-box (1), each end cap (5) is force-fitted in the bearing (4) of correspondence between rotating shaft (2) and the gear-box (1); It is characterized in that: described end cap (1) is provided with axial adjustment structure.

2. rotor pump according to claim 1, it is characterized in that: described end cap (1) is provided with axial adjustment structure and refers to, described end cap (5) is provided with and is positioned at concentrically ringed tapped hole (5.1) more than two and two, described tapped hole (5.1) is symmetrical along the circumference of end cap (5), and each tapped hole (5.1) is combined with the bolt (6) that can offset with the end face in the hole of gear-box (1).

3. rotor pump according to claim 2, it is characterized in that: the removable connection of each end cap (5) and gear-box (1) refers to that bolt connects, being centered close on the concentric circle of bolt mounting holes (5.2) on the center of described tapped hole (5.1) and the end cap (5).

4. rotor pump according to claim 3, it is characterized in that: described tapped hole (5.1) is four, and distributes along even circumferential.