TWI413738B - Cylinder structure of high-pressure plunger pump - Google Patents

Abstract

A cylinder structure of high-pressure plunger pump comprises a body having a plurality of receiving grooves and a plurality of wear-resistance layers received in the receiving grooves. In a periphery of a bottom of each receiving groove is provided a concave portion and concavely formed an annular groove. Each wear-resistance layer is provided with a flange for cooperating with the concave portion and an abutting edge for cooperating with the annular groove. A piston is received in the receiving groove and is attached to the wear-resistance layer. With the concave-convex matching structure of the wear-resistance layers and the receiving grooves, the anti-pressure and wear-resistance properties can be improved. Moreover, such a structure is low cost and is quick to manufacture.

Description

Cylinder structure of high pressure piston pump

The present invention relates to a hydraulic cylinder, and more particularly to a cylinder structure of a high pressure piston pump.

Referring to FIG. 1 , a bimetal cylinder structure 10 conventionally used for a high pressure piston pump is shown; the cylinder system has a body 11 and a copper layer structure 12 made of steel or iron. In the seven-hole cylinder structure, a plurality of slots 111 are defined in the center of the body, and seven pockets 112 are recessed on the circumference of the stacking port 111. The cavity 112 and the flow channel 113 extend through the end faces of the body 11. The copper layer structure 12 is molded by a mold, and is formed into a thin layer structure in conformity with the internal space of the body 11, as shown in FIG. The copper layer structure 12 extends from the groove wall at the opening of each of the pockets 112 to the bottom of the cavity 112, and extends to the end surface of the body 11 via the flow channels 113 to form a porous flat sheet structure.

Each of the pockets 112 of the body 11 is configured to receive oil and a piston (not shown), and the piston is reciprocated in the pocket 112 to squeeze the oil from the runner 113. In order to prevent the copper layer structure 12 from being disengaged from the body 11 due to the reciprocating displacement of the piston, and in order to reduce the friction between the piston and the body 11, the inner space of the steel body 11 and its end surface are cast to form the integrally formed The copper layer structure 12; however, the conventional cylinder structure is a manufacturing method in which the integrally formed copper layer structure 12 must be cast by a mold, not only the technology has a relatively difficult degree, but also the molding time is long, and the casting mold is matched. For the general mold, after the molding, the process of multiple dressing processing still needs to be carried out to reduce the production efficiency; if the finishing process after the casting is to be reduced, the precision mold is required, and the manufacturing cost is relatively increased. Therefore, the conventional double metal cylinder is used. The body structure still has room for improvement.

In view of the above-mentioned usage problems, the inventors of the present invention considered that it is necessary to design a cylinder structure of a high-pressure plunger pump which is simple in structure and fast in forming without significantly increasing the cost.

The main object of the present invention is to provide a cylinder structure of a high pressure piston pump, which is used with a plurality of pistons, and the cylinder structure comprises a body made of steel or iron and having a cylindrical structure. A through hole is formed in the center of the main body, and the opening is defined as an axial direction, and a plurality of pockets are defined in the axial direction of the opening on the circumference of the opening. And a plurality of wear-resisting layers which are disposed of the number of the grooves of the body and are made of copper-iron double alloy, alloy copper, alloy steel or non-ferrous metal and have a layered metal structure; wherein each body of the body The groove is provided at a bottom periphery thereof with a concave portion extending toward the body and a ring groove recessed along the axial direction, and each of the wear-resisting layers forms a flange corresponding to the concave portion of each of the receiving grooves, and the corresponding groove is formed The ring groove of the groove is formed with a flange; one of the wear layer is fixed to one of the groove groove walls, the flange is concave-convex with the concave portion, and the flange is received in the ring groove, and The piston is placed in the cavity to fit the wear layer.

Thereby, the present invention is fixed by the wear-resistant layer forming a concave-convex matching structure with the body, so that the iron or copper wear-resistant layer is provided between the body cavity of the cylinder structure and the piston, thereby improving the cylinder. The structure has the pressure resistance and the wear resistance, and reduces the friction of the cylinder structure when the piston is quickly actuated; meanwhile, the cylinder structure provided by the invention does not need complicated processing steps, and does not need to use a precision mold, but has It has the advantages of low manufacturing cost and easy molding and manufacturing.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [Simplified Description of the Drawings] for details: First, please use Figure 2 with Figure 3 The present invention provides a preferred embodiment of a cylinder structure of a high pressure piston pump, the cylinder structure including a body 20, a plurality of wear resistant layers 30 and a gasket 40, and the cylinder structure is provided for several The piston 50 is used; wherein: the body 20 is selected from a cylindrical structure made of steel or iron and has two ends. The center of the body 20 defines a through hole 21 extending through the two ends, and the opening 21 is defined as an axis. And a plurality of pockets 22 are formed in the axial direction X of the body 20 at the circumferential side of the opening 21, and each of the pockets 22 is provided with a concave portion 221 and an edge extending toward the body 20 at the bottom periphery thereof. The axial X recessed ring groove 222, and the bottom of each of the pockets 22 defines a first-stage passage 23 extending through the two ends of the body 20; the end surface of the body 20 through which the flow passage 23 extends is a distribution end surface 201; In the embodiment, the body 20 has seven pockets 22, and each of the pockets 22 has a cylindrical shape. Providing a piston 50; the plurality of wear-resistant layers 30 are made of a layered metal structure selected from the group consisting of copper-iron double alloy, alloy copper, alloy steel or non-ferrous metal, and the corresponding groove of the body 20 The number of 22 and its structural configuration are set; each of the wear layer 30 defines a flange 31 corresponding to the recess 221 of each of the pockets 22, and a ring edge 32 is formed for the ring groove 222 of the receptacle 22; One of the wear layers 30 is fixed to one of the groove walls of the plurality of recesses 22, and each of the flanges 31 is fixedly engaged with the recesses 221, and the flange 32 is received by the ring groove 222. The wear layer 30 is located between the pocket 22 and the piston 50, and the piston 50 is attached to the wear layer 30. In the embodiment, as shown in FIG. 3, the recess of the body 20 is as shown in FIG. The 221 is a rectangular annular space; the flange 31 of each of the wear layers 30 is shaped like a concave portion 221 into a rectangular flange having a rectangular cross section; and, as shown in FIG. 4, each of the bodies 20 The concave portion 221 is formed by expanding the bottom periphery of the self-receiving groove 22 to form a ring-cone structure toward the cavity 22; the flange 31 of each of the wear-resistant layers 30 corresponds to The recessed portion 221 is shaped into an annular flange having an angular cross section; the spacer 40 is a porous sheet-like structure made of copper metal, and is fixed to the distribution end surface 201 of the body 20, corresponding to the opening of the body 20. A through hole 41 is defined in the opening 21, and a corresponding number of flow passage holes 42 are opened corresponding to each of the flow passages 23.

The above description is the main components of the embodiment of the present invention and the configuration description thereof. As for the manufacturing method and the effect of the preferred embodiment of the present invention, the following description will be made.

Referring to FIG. 2 and FIG. 3 , the cylinder structure is disposed between the cavity 22 of the body 20 and the piston 50 to improve the pressure resistance of the cylinder structure. The wear resistance and the friction of the cylinder structure when the piston 50 is quickly actuated; the cylinder structure provided by the present invention is to form the body 20 into a cavity having the recess 221 and the ring groove 222. 22, and a flow passage 23 penetrating the body 20 is formed at the bottom of the cavity 22; and then a pipe member having an outer diameter and a slightly smaller or equivalent groove diameter of the cavity 22 is disposed, and the pipe member is an iron pipe or a copper pipe; One end of one end of the tubular member abuts against the annular groove 222 at the bottom of the receiving groove 22, and a force is applied to the tubular member, so that the peripheral edge of one end of the tubular member is pressed together with the bottom surface of the receiving groove 22 to form an uneven shape. The end edge structure; then, the end edge structure of the inner portion of the copper tube is stamped by a mold, and the end edge structure is pressed by the force to be flatly expanded toward the outer diameter of the tube and embedded in the recess 221 The tube member forms a wear layer 30 corresponding to the shape of the receiving groove 22, the end edge structure forming the flange 31, And the wear layer 30 is fixedly fixed to the body 20 to prevent the wear layer 30 from being displaced due to the rapid movement of the piston 50; finally, the inner wall of the wear layer 30 is milled according to the size of the piston 50, so that the The inner wall of the wear layer 30 and the wear layer 30 are more evenly connected to the bottom of the cavity 22, thereby forming a flat and smooth space for the piston 50 to reciprocate.

In summary, the cylinder structure of the high-pressure plunger pump provided by the present invention has the advantages of low manufacturing cost, rapid molding, and the like because the manufacturing method is simple and does not require complicated processing steps, and it is not necessary to use a precision mold.

"Use"

10‧‧‧bimetallic cylinder structure

11‧‧‧Ontology

12‧‧‧Bronze structure

111‧‧‧Settings

112‧‧‧ 容容

113‧‧‧ flow path

"this invention"

20‧‧‧ body

201‧‧‧ distribution end face

21‧‧‧ mouth

22‧‧‧ 容容

221‧‧‧ recess

222‧‧‧ ring groove

23‧‧‧ flow path

30‧‧‧ wear layer

31‧‧‧Flange

32‧‧‧Resist

40‧‧‧shims

41‧‧‧Perforation

42‧‧‧Rail hole

50‧‧‧Piston

X‧‧‧ axial

Fig. 1 is a schematic perspective view showing the cylinder structure of a conventional high pressure piston pump.

Fig. 2 is a perspective cross-sectional view showing the cylinder structure of the high pressure plunger pump of the present invention.

Fig. 3 is a schematic cross-sectional view showing a second view of the present invention.

Fig. 4 is a partially enlarged schematic view showing a third diagram of the present invention.

Fig. 5 is a partially enlarged schematic view showing another structural state of the concave portion of the cylinder block structure of Fig. 4 of the present invention.

20. . . Ontology

201. . . Distribution end face

twenty one. . . Port

twenty two. . . Crate

221. . . Concave

222. . . Ring groove

twenty three. . . Runner

30. . . Wear layer

31. . . Flange

32. . . Reach

40. . . Gasket

41. . . perforation

42. . . Runner hole

Claims (4)

A cylinder structure of a high-pressure plunger pump, the cylinder structure is used with a plurality of pistons; wherein the cylinder structure comprises: a body, which is selected from a cylindrical structure made of steel or iron and has two ends, the body A central opening is formed through the two ends, and the opening direction of the opening is defined as an axial direction; the main body is provided with a plurality of pockets along the axial direction at the circumferential side of the opening, and each of the receiving slots is provided at a periphery of the bottom thereof. a concave portion extending toward the body and a ring groove recessed along the axial direction; and each of the bottom of the receiving groove is provided with a first-class channel, each of the receiving groove and the bottom flow path extending through the two ends of the body; a plurality of wear-resistant layers Corresponding to the number of the groove and the structural form of the body, and the wear layer is a layered metal structure made of a copper-iron double alloy, an alloy copper, an alloy steel or a non-ferrous metal; each of the wear layers corresponds to The recess of each of the pockets forms a flange, and abutting the groove of the ring that should accommodate the groove; and one of the wear layers is fixed to one of the groove walls, the flange and the flange The concave portion is concave-convex, the flange is accommodated in the ring groove, and the piston is accommodated The receiving groove with the abrasion resistant layer bonded to. The cylinder block structure of the high-pressure piston pump according to the first aspect of the invention, wherein the end surface of the main body is defined as a distribution end surface; the cylinder structure further comprises a gasket disposed on the distribution end surface. The gasket is provided with a perforation corresponding to the opening of the main body, and a corresponding number of flow passage holes are opened corresponding to each of the flow passages. The cylinder block structure of the high-pressure plunger pump according to claim 1, wherein each of the concave portions of the body has a rectangular annular space; the flange of each of the wear-resistant layers is formed by a concave shape. It is a circular flange with a rectangular cross section. The cylinder block structure of the high-pressure plunger pump of claim 1, wherein each of the recesses of the body is expanded by a periphery of the bottom of the self-receiving groove to form a ring-cone structure facing the groove; The flange of the wear layer is formed into an annular flange having an angular shape corresponding to the shape of the recess.