CN202441595U

CN202441595U - Gear-pump floating-shaft-sleeve assembly

Info

Publication number: CN202441595U
Application number: CN2012200261987U
Authority: CN
Inventors: 蔡根荣
Original assignee: ZHEJIANG SF OILLESS BEARING CO Ltd
Current assignee: ZHEJIANG SF OILLESS BEARING CO Ltd
Priority date: 2012-01-19
Filing date: 2012-01-19
Publication date: 2012-09-19
Anticipated expiration: 2022-01-19

Abstract

The utility model discloses a gear-pump floating-shaft-sleeve assembly and aims to provide the gear-pump floating-shaft-sleeve assembly which is simple in structure, convenient to manufacture and long in service life. The gear-pump floating-shaft-sleeve assembly comprises a 8-shaped floating shaft sleeve, wherein two end faces of the floating shaft sleeve is provided with oil grooves which are used for unloading and stress balance. The gear-pump floating-shaft-sleeve assembly is characterized in that sliding bearings are installed inside two shaft holes of the floating shaft sleeve and made of composite materials in rolling formation, excircles of the sliding bearings are steel sleeves, alloy copper powder layers are sintered on inner walls of the steel sleeves, and polytetrafluoroethylene layers adhere to the alloy copper powder layers. According to the gear-pump floating-shaft-sleeve assembly, the sliding bearings are made of composite materials in rolling formation and take the steel sleeves as matrices to achieve good rigidity. Besides, the polytetrafluoroethylene layers with good abrasive resistance adhere to the alloy copper powder layers, so that abrasive resistance of the shaft holes of the gear-pump floating-shaft-sleeve assembly is greatly improved and service life of a gear pump is prolonged.

Description

Gear pump floating buss assembly parts

Technical field

The utility model relates to the part of gear pump, relates in particular to a kind of gear pump floating buss assembly parts.

Background technique

Gear pump is a part commonly used in the hydraulic system, and it is to rely between pumping cylinder and engaging gear formed swept volume to change and move the rotary pump of carrying liquid or making it supercharging.It by two meshed gears be close to floating buss that the gear both ends of the surface are 8 fonts and form the space of two sealings.Axle on two gears is inserted in the floating axle trepanning of 8 fonts.When gear rotated, the volume in the side that is out of gear space was big from little change, formed vacuum, and liquid is sucked, and the spatial volume of gear engagement side is from diminishing greatly, went in the pipeline and liquid clamp-oned, and formed high pressure.In the gear pump of some big discharge capacities; Use needle bearing between floating buss and the axle, but in the gear pump of some little discharge capacities, floating buss with spool between owing to the restriction of size; More is cylinder iron to overlap anti-attrition; Therefore very easily wearing and tearing, but also can the iron filings under the wearing and tearing be sneaked in hydraulic oil, the wearing and tearing or the system failure of other elements in the system caused.

Summary of the invention

The object of the present invention is to provide a kind of simple in structure, easily manufactured, the gear pump floating buss assembly parts of long service life.

In order to achieve the above object; The technological scheme of the utility model is: it includes the floating buss that is 8 fonts; Both ends of the surface at floating buss are shaped on the oil groove that supplies off-load and balance pressure, it is characterized in that in two axis holes of floating buss, the sliding bearing that rolls into composite material being installed, and the cylindrical of said sliding bearing is a steel bushing; The inwall sintering of steel bushing has the alloyed copper bisque, on the alloyed copper bisque, is attached with polytetrafluoroethylene floor.

Press the gear pump floating buss assembly parts that said structure is made; Owing to the sliding bearing that rolls into composite material; Its matrix is a steel bushing; Good rigidly makes the good polytetrafluoroethylene floor of wear resistance attached to top through the alloyed copper bisque, has improved the wear resistance of gear pump floating buss assembly parts axis hole and the working life of gear pump greatly.

Description of drawings

Fig. 1 is the plan view of gear pump floating buss assembly parts;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the right elevation of Fig. 1;

Fig. 4 is the partial enlarged drawing in C zone among Fig. 1.

Among the figure: 1, floating buss; 2, oil groove; 3, axis hole; 4, sliding bearing; 5, steel bushing; 6, alloyed copper bisque; 7, polytetrafluoroethylene floor.

Embodiment

Below in conjunction with accompanying drawing the utility model is done further to describe.

Fig. 1, Fig. 2, Fig. 3 are the structural representations of gear pump floating buss assembly parts.From figure, find out; It includes the floating buss 1 that is 8 fonts, is shaped on the oil groove 2 that supplies off-load and balance pressure in the both ends of the surface of floating buss 1, in two axis holes 3 of floating buss 1, the sliding bearing 4 that rolls into composite material is installed; Said sliding bearing 4; Its cylindrical is a steel bushing 5, and the inwall sintering of steel bushing 5 has alloyed copper bisque 6, and it is as shown in Figure 4 on alloyed copper bisque 6, to be attached with polytetrafluoroethylene floor 7.

Claims

1. gear pump floating buss assembly parts; It includes the floating buss that is 8 fonts; Both ends of the surface at floating buss are shaped on the oil groove that supplies off-load and balance pressure, it is characterized in that in two axis holes of floating buss, the sliding bearing that rolls into composite material being installed, and the cylindrical of said sliding bearing is a steel bushing; The inwall sintering of steel bushing has the alloyed copper bisque, on the alloyed copper bisque, is attached with polytetrafluoroethylene floor.