CN200968281Y

CN200968281Y - Gear ring pump

Info

Publication number: CN200968281Y
Application number: CN 200620125100
Authority: CN
Inventors: 吴涛慧
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-16
Filing date: 2006-11-16
Publication date: 2007-10-31
Anticipated expiration: 2016-11-16

Abstract

The utility model is an internal meshing gear pump consisting of a pump body with inner holes, a internal gear ring rotating in the inner hole, a small gear meshing with the inner gear ring, a drive axis driving the small gear to rotate, a crescent-shaped partition board component positioned on a pump body hole, a connecting board ascertaining the end surface of the crescent-shaped partition board component are on the same plane with the inner end surface of the pump body inner holes, an end cover and so on. The crescent-shaped partition board component separates the space between the small gear and the internal gear ring into two separate seal cavities, that is, an oil suction cavity and an oil compressing cavity. The pump body inner holes embed or sinter the wear resistant material, or a rolling bearing is positioned between the pump body inner holes and the internal gear ring, thus reducing the abrasion between the outer circle of the internal gear ring and the pump body inner holes during the operation process. The internal meshing gear pump is characterized in a simple structure, a stable output pressure and a small abrasion. The utility model greatly lowers the difficulty of manufacturing internal meshing gear pumps.

Description

Crescent gear pump

Technical field

The utility model belongs to the fluid machinery technical field, is specifically related to a kind of crescent gear pump.

Background technique

Crescent gear pump is usually by the pump housing A of band endoporus, the ring gear B that in pump housing endoporus, rotates, and with the small gear C of ring gear engagement, parts such as the crescent shape divider D between ring gear and the small gear are formed, and structure is seen Fig. 1, Fig. 2.Because the effect of crescent shape divider forms two enclosed spaces---oil sucting cavity and pumping cavity between small gear and the ring gear.Ring gear is also with the equidirectional rotation when the direction of arrow rotate when transmission shaft drives small gear by key, because the variation of oil sucting cavity and pumping cavity volume is brought into oil by oil sucting cavity, pumping cavity is discharged, and realizes the oily process of pump.Crescent shape divider arrangement scheme in the crescent gear pump of prior art has several: 1. the crescent shape divider and the pump housing are processed into integral body, complex process, and difficulty of processing is big, and structure is seen Fig. 3, Fig. 3-1.2. a side of crescent shape divider adopts straight pin to be positioned on the pump housing, and installation strength is low, is not suitable for adopting this method in high-pressure service pump, needs to increase the position of thickness to guarantee that straight pin is installed of swing link simultaneously, thereby influences the structural compactness of oil pump.3. crescent shape divider and pump end cap are processed into integral body, and technology is complicated, and difficulty of processing is bigger.4. in person at model utility crescent gear pump application number: the method that adopts among the 200620070868.X need be provided with the position that the crescent-shaped separator groove is used for fixing crescent-shaped separator in the both sides of gear.

Summary of the invention

The purpose of this utility model is exactly in order to address the above problem, and by changing the form that connects between crescent shape divider and the pump housing, provides a kind of pump housing and crescent shape to separate the inside engaged gear pump structure that assembly is easy to process.

The purpose of this utility model is by changing the structure of Fig. 2 middle pump body A, among Fig. 2, crescent shape divider D be arranged in pump housing endoporus and the pump housing as a whole.The technical solution of the utility model is to establish a crescent shape demarcation strip assembly, it is made up of cylindrical body and crescent shape divider, cylindrical body cylindrical and crescent shape divider outer surface are in same cylndrical surface, endoporus is concentric in crescent shape divider internal surface and the cylindrical body, the eccentric distance e of endoporus and cylindrical equals the centre distance of ring gear and pinion in the cylindrical body, sees Fig. 4, Fig. 4-1.The structure of the pump housing is seen Fig. 5, Fig. 5-1.With the crescent-shaped separator assembly by being installed in the pump housing with cooperating of pump housing mesopore 2, see Fig. 6, by the fastening effect of screw, the crescent-shaped separator assembly and the pump housing are installed on the joining plate, make that interior edge face is in the same plane in crescent-shaped separator assembly interior edge face and the pump housing endoporus.Its structure constituent element and existing gear pump are different, see Fig. 7, that is: by the pump housing 9 that contains endoporus, the ring gear 8 that can in endoporus, rotate, with the small gear 7 of ring gear 8 engagements, drive transmission shaft 1 that small gear 7 rotates, be installed in crescent-shaped separator assembly 10 in the pump housing, joining plate 12 etc. forms.

In the utility model crescent gear pump, in order to reduce the wearing and tearing between the ring gear cylindrical and pump housing endoporus in the working procedure, prolong the working life of pump, improve the mechanical efficiency of crescent gear pump, pump housing endoporus can be inlayed or sintered wearresistant material 14, sees Fig. 8; Or between pump housing endoporus and ring gear 8, rolling bearing 15 is set, see Fig. 9.

The utility model crescent gear pump has the oil motor function, injects high pressure oil at oil sucting cavity, then specified rotating speed and the torque of transmission shaft output.

Description of drawings

Fig. 1 is the prior art structural drawing

Fig. 2 is the prior art structural drawing

Fig. 3-1 is the parts drawing of Fig. 2 middle pump body

Fig. 3 is the A-A sectional view among Fig. 3-1

Fig. 4-1 is the crescent-shaped separator component drawings

Fig. 4 is the B-B sectional view among Fig. 4-1

Fig. 5-1 is the parts drawing of the utility model middle pump body

Fig. 5 is the C-C sectional view among Fig. 5-1

Fig. 6 is installed in structural drawing in the pump housing for the crescent-shaped separator assembly cooperates

Fig. 7 is the utility model technical architecture plan

Fig. 8 inlays for pump housing endoporus or sintered wearresistant material and ring gear cylindrical matching chart

Fig. 9 is for being provided with rolling bearing structure figure between pump housing endoporus and the ring gear cylindrical

Label among Fig. 4-1: R is the radius of cylindrical body cylindrical and crescent shape divider outer surface, and r is the radius of crescent shape divider internal surface, and e is the throw of eccentric of endoporus and cylindrical

Label among Fig. 5: hole 1 is the matching hole of the pump housing and ring gear, and hole 2 is that the pump housing cooperates mounting hole with the crescent-shaped separator assembly

Label among Fig. 7: 1 is transmission shaft, and 2 is the flange circle, and 3 is seal ring, and 4 is bearing, and 5 is back-up ring, and 6 is end cap, and 7 is small gear, and 8 is ring gear, and 9 is the pump housing, and 10 is the crescent-shaped separator assembly, and 11 is bearing shell, and 12 is joining plate, and 13 is screw

Label among Fig. 8: 8 is ring gear, and 9 is the pump housing, and 14 inlay or the high-abrasive material of sintering for pump housing endoporus

Label among Fig. 9: 8 is ring gear, and 9 is the pump housing, and 15 is rolling bearing

Embodiment

Specifically describe the utility model below by embodiment

Fig. 7 represents an embodiment of the present utility model, and the crescent-shaped separator assembly is installed in the pump housing by the cooperation in hole.Screw fits together joining plate, crescent-shaped separator assembly and the pump housing, make that thread form demarcation strip assembly interior edge face and pump housing endoporus interior edge face are in the same plane, the small gear of crescent gear pump is connected with transmission shaft by flat key, and transmission shaft is bearing in respectively in the hole of end cap, crescent-shaped separator assembly by bearing, bearing shell.The two ends of transmission shaft have flange circle, seal ring, joining plate and O shape circle to seal.The axial float of back-up ring restriction transmission shaft.End cap, the pump housing are located by connecting with the cylinder locating stud and are integral.Ring gear is positioned in the pump housing endoporus and pinion.Pump housing endoporus can be inlayed or sintered wearresistant material or between pump housing endoporus and ring gear rolling bearing is set, and reduces the wearing and tearing between the ring gear cylindrical and pump housing endoporus in the working procedure.Prolong the working life of pump.Improve the mechanical efficiency of crescent gear pump.

Claims

1. crescent gear pump: by the pump housing of band endoporus, the ring gear that can in endoporus, rotate, small gear with the ring gear engagement, drive the transmission shaft of pinion rotation, be installed in the crescent-shaped separator assembly in the pump housing hole, determine that interior edge face joining plate, end cap in the same plane formed in crescent-shaped separator assembly interior edge face and the pump housing endoporus.Swing link shape demarcation strip assembly becomes two independently Seal cages---oil sucting cavity and pumping cavity with small gear with separated by spaces between the ring gear.It is characterized in that: the hole is set in the pump housing in order to cooperate the crescent-shaped separator assembly is installed, interior edge face is in the same plane in crescent-shaped separator assembly interior edge face and the pump housing endoporus.

2. according to right 1 described crescent gear pump, it is characterized in that: in the crescent-shaped separator assembly, cylindrical body cylindrical and crescent shape divider cylindrical are in same cylndrical surface.The throw of eccentric of endoporus and cylindrical equals the centre distance of ring gear and pinion in the cylindrical body.

3. according to right 1 described crescent gear pump, it is characterized in that: pump housing endoporus is inlayed or sintered wearresistant material, or between pump housing endoporus and ring gear rolling bearing is set.