Patent EP-3091251-A1 (EP)
Inventor: LI MING
IPC: F04B9/04
Filed: 2014-12-03
Abstract: The present invention provides a reciprocating plunger pump, which comprises a plunger pump engine body, a plunger pump head and a slider crank mechanism which is located in the said plunger pump engine body; the said plunger pump engine body comprises an engine seat, a crankcase upper cover provided on the said engine seat, and a bearing seat provided on the interspaces formed between the said engine seat of the plunger pump and the crankcase upper cover; the plunger pump engine seat comprises a bottom wall and a bottom sidewall which is integrally formed with the said bottom wall and extends from the edge of the bottom wall far away to the surface of the bottom wall; the said crankcase upper cover comprises an upper wall and an upper sidewall which extends from the upper wall far away outwards the surface of the upper wall; the said engine seat of the plunger pump and the crankcase upper cover are buckled into a whole, the relevant position of the free end in both the upper sidewall and bottom sidewall are connected into a whole by the connector; the relevant position of the two relative sidewalls of the interspaces which are formed between the engine seat of the plunger pump and the crankcase upper cover is still provided with a crankshaft penetrating bore; the crankshaft penetrating bore is formed by the half bore which is located on the relevant upper sidewall and the bottom sidewall; the internal interspaces formed between the engine seat of the plunger pump and the crankcase upper cover is the crankcase space which is still provided with a bearing seat including the body of it, the bearing seat is provided with at least one lower half bearing bore; the bearing seat and the crankcase upper cover are fixedly fitted into a whole, the lower half bearing bore and the upper half bearing bore which is located on the relevant position of the crankcase upper cover form a complete bearing bore which is the middle bearing bore; the middle bearing bore is located in the middle of the two crankshaft penetrating bores; the location corresponding to the penetrating location of the crankcase upper cover is provided with a through bore which is the plunger bore; the slider crank mechanism is including the reciprocating parts, unsplit crankshaft and slide block; the reciprocating parts are containing reciprocating parts body which is provided with a circular through bore which is the accommodation bore of slide block; the reciprocating parts body is still provided with a guide section which is along reciprocating motion direction with an oriented surface; the slide block comprises the slide block body and the annular outer ring which is fitted over on the peripheral region of the slide block body; the slide block body is the split structure and provided with an eccentric circular bore, the subdivision surface passes through the central of the eccentric circular bore which divides it into two identical half bores, which are the first section and the second section; the first section of the slide block body is provided with an assembly bore which is opened on the subdivision surface is the first section assembly bore; the relevant position between the second section and the first section of the assembly bore is provided with a through bore which is penetrating from the second section of the subdivision surface to the peripheral surface; the unsplit crankshaft is containing at least one crankpin; the crankpin of the unsplit crankshaft is at least fitted over by a slide block by penetrating the eccentric circular bore, each of the slide blocks is fitted into the accommodation bore of the reciprocating parts; the crankshaft is located on the crankshaft space, the corresponding crankshaft main journal and the crank arm are supported in the bore of the bearing seat; one end of the installation and working part of the reciprocating parts, which is cooperated with the plunger pump head provided on the outer side of the plunger bore, penetrates into relevant plunger bore. The present application still discloses a reciprocating plunger pump engine body, a slider crank mechanism and a slide block, a bearing seat, a crankcase upper cover and a plunger seat.