CN113090672A

CN113090672A - Sliding shaft seat of gear pump and manufacturing process thereof

Info

Publication number: CN113090672A
Application number: CN202110330885.1A
Authority: CN
Inventors: 黄朝强; 陈鹏洲; 黄昊辰
Original assignee: Longyan Jinshan Powder Metallurgy Co ltd
Current assignee: Longyan Jinshan Powder Metallurgy Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-07-09

Abstract

The invention provides a sliding shaft seat of a gear pump, which comprises: the shaft sleeve and the bearing seat are integrally formed into an integral structure; the shaft sleeve is two circular holes into which the gear shaft is inserted; the shaft sleeve is an oil-containing sliding bearing manufactured by a powder metallurgy process; also provides a manufacturing process for manufacturing the sliding shaft seat, which comprises the following steps: step one, mixing a plurality of metal powders to prepare blank powder; secondly, the mixed blank powder is filled into a bearing forming die for forming; step three, sintering the molded bearing model; step four, shaping the sintered bearing model through a shaping die; step five, performing thickness finish machining on the shaped bearing model to form a finished product; the bearing seat is formed by powder metallurgy and punching through the shaping die, the bearing and the bearing seat are integrated, and the precise shaft hole size and the appearance size can be obtained through punching through the shaping die.

Description

Sliding shaft seat of gear pump and manufacturing process thereof

Technical Field

The invention relates to a sliding shaft seat of a gear pump and a manufacturing process thereof.

Background

The existing 8-shaped bearing seat (shown in figure 1) on the gear pump comprises an 8-shaped bent shaft seat body 1, is complex in structure, cannot be ground by a grinding bed, and has extremely high required precision, an embryo is cast by adopting the modes of aluminum alloy casting, injection molding, nodular graphite casting and the like, and the embryo is subjected to shaft hole finish machining, appearance finish machining and thickness finish machining, and finally is embedded with a sliding bearing to finish the manufacturing; the three dimensions of the shaft hole, the shape and the thickness are required to be finely machined in the middle (the center distance between the two circular ring holes, the radian of the side surface of the shaft seat outer ring and the concentricity of the circular ring holes and the shaft seat outer ring are all difficult points for fine machining), so that the machining cost is high, the efficiency is low, after the machining is finished, the two sliding bearing circular ring pieces 2 are required to be inlaid, and the cost is further increased.

Disclosure of Invention

The invention aims to overcome the defects and provides a sliding shaft seat of a gear pump and a manufacturing process thereof.

The invention adopts the following technical scheme:

a sliding axle seat of a gear pump, comprising: the shaft sleeve and the bearing seat are integrally formed into an integral structure; the shaft sleeve is two circular holes into which the gear shaft is inserted; the shaft sleeve is an oil-containing sliding bearing manufactured by a powder metallurgy process.

Preferably, the plain bearing inner wall has 5 to 15% porosity.

A manufacturing process of a sliding shaft seat of a gear pump is characterized by comprising the following steps:

step one, mixing a plurality of metal powders to prepare blank powder.

And step two, filling the mixed blank powder into a bearing forming die for forming.

And step three, sintering the molded bearing model.

And step four, shaping the sintered bearing model through a shaping die.

And step five, performing thickness finish machining on the shaped bearing model to form a finished product.

Preferably, in the first step, iron powder and a small amount of copper powder are mixed to prepare blank powder; compared with an aluminum alloy shaft seat, the iron powder and a small amount of copper powder are low in material cost, and a powder sintered part contains 5-15% of pores, so that the inner wall of the sliding bearing has oil storage performance, lubricating oil is used for lubricating during working, friction among the friction is reduced, an anti-rust effect is achieved, and the working time is prolonged.

Preferably, in the second step, the mixed powder is loaded into a bearing forming mold and is formed by pressure forming or pressureless forming.

The invention has the beneficial effects that: the bearing is formed by powder metallurgy and punching through a shaping die, the bearing and the bearing seat are integrated, and the precise shaft hole size and the appearance size can be obtained by punching through the shaping die, and the powder sintered part contains 5-15% of pores and has the characteristics of oil storage lubricating property, good wear resistance, high precision maintenance and the like; in conclusion, the invention greatly improves the production efficiency and obviously improves the precision and the wear resistance.

Drawings

Fig. 1 is a schematic view of a prior art bearing housing.

Fig. 2 is an overall schematic of the present invention.

Detailed Description

In order to make the purpose and technical solution of the present invention clearer, the present invention is further described with reference to the accompanying drawings and embodiments:

as shown in fig. 2, a sliding shaft seat of a gear pump (which is a modified 8-shaped shaft seat) comprises: the shaft sleeve 31 and the bearing seat 3 are integrally formed into an integral structure; the shaft sleeve 31 is two circular holes into which the gear shaft is inserted; the sleeve 31 is an oil-impregnated sliding bearing manufactured by a powder metallurgy process.

Preferably, the plain bearing inner wall has 5 to 15% porosity.

step one, mixing a plurality of metal powders to prepare blank powder.

And step three, sintering the molded bearing model.

And step four, shaping the sintered bearing model through a shaping die.

Preferably, in the first step, iron powder and copper powder are mixed to prepare green powder.

Preferably, in the first step, the content of the copper powder is 1-50 wt%.

Preferably, in the fourth step, the shaft seat semi-finished product after burning is shaped through a shaping mold, and the method is characterized in that: after the shaping, the inner surface and the outline side surface of the circular hole can be used without processing.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The components used in the present invention are all standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experiments.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.

Claims

1. A sliding shaft seat of a gear pump is characterized by comprising:

the shaft sleeve and the bearing seat are integrally formed into an integral structure;

the shaft sleeve is two circular holes into which the gear shaft is inserted;

the shaft sleeve is an oil-containing sliding bearing manufactured by a powder metallurgy process.

2. The sliding shaft seat of a gear pump according to claim 1, wherein:

the inner wall of the sliding bearing has 5-15% of pores.

3. The process for manufacturing a sliding shaft seat of a gear pump according to claim 1, comprising the steps of:

step one, mixing a plurality of metal powders to prepare blank powder;

secondly, the mixed blank powder is filled into a bearing forming die for forming;

step three, sintering the molded bearing model;

step four, shaping the sintered bearing model through a shaping die;

4. The manufacturing process of a sliding shaft seat of a gear pump according to claim 3, wherein:

in the first step, iron powder and copper powder are mixed to prepare blank powder.

5. The manufacturing process of a sliding shaft seat of a gear pump according to claim 4, characterized in that:

in the first step, the content of the copper powder is 1-50 wt%.

6. The manufacturing process of a sliding shaft seat of a gear pump according to claim 3, wherein:

in the fourth step, the shaft seat semi-finished product after burning is shaped through a shaping die, and the method is characterized in that: after the shaping, the inner surface and the outline side surface of the circular hole can be used without processing.