CN2414226Y

CN2414226Y - Pithch-shangeable screw high-pressure pump

Info

Publication number: CN2414226Y
Application number: CN 00224491
Authority: CN
Inventors: 杨石山
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-30
Filing date: 2000-03-30
Publication date: 2001-01-10
Anticipated expiration: 2010-03-30

Abstract

The utility model relates to a pitch-changeable screw high-pressure pump. The leading strokes of a pitch-changeable screw decrease according to equal difference value from a suction inlet to an extrusion outlet, and the volume of each leading stroke containers decreases following the reduction of the length of each leading stroke. When the pitch-changeable screw is rotated, liquid is pushed forwards and along the trace of screw thread lines from the suction inlet to the extrusion outlet under the action of the pushing force of a screw thread tooth surface. A sealing component on a screw-thread tooth top surface is tightly stuck to the internal surface of the pump body so as to prevent the liquid from flowing reversely, and the liquid can not be compressed and quickly pushed. Therefore, the utility model achieves the effects of high liquid pressure, large flow and wide applicability.

Description

The Variable pitch screw high-pressure service pump

The utility model relates to a kind of liquid transfer high-pressure service pump, particularly adopts the high-pressure service pump of the steady supercharging of Variable pitch screw.

In industrial and agricultural production at present, carry oils, water, fluid chemical raw material by adopting centrifugal pump, gear pump, plunger pump, because of multiple factor affecting such as the viscosity of liquid body, concentration, pH value, flow, pressure, exist the gear pump flow little, the centrifugal pump incompatibility is used to transmit the liquid of high viscosity, high concentration, the plunger pump volume of beating underflow is big, flow is little, inefficient drawback, and the use narrow limitation is all arranged.

The purpose of this utility model is to provide a kind of pressure height, and flow is big, the Variable pitch screw high-pressure service pump that applicability is wide.

The purpose of this utility model is achieved through the following channels: according to the required outlet pressure of operating mode, 5 screw portions of Variable pitch screw are defined as 3-5 helical pitch, from suction port 6 to the length that extrudes mouthful 2 each helical pitch by etc. difference successively decrease, the volume of each helical pitch content cavity 3 is with the descending variation of the length of helical pitch, have the guide groove consistent 15 on the thread end face 4 with the thread helix line tracking, guide groove 15 can be a square groove, also can be half slot, in the guide groove 15 by the sealing mechanism of forming by Sealing 13 and shell fragment 14 7.Shell fragment 14 is fixed on the bottom land of guide groove 15, and jacking Sealing 13, Sealing 13 are close to the pump housing 1 inner periphery.Play the effect that prevents that liquid from flowing backwards.The shape of Sealing 13 shapes and guide groove 15 matches.Variable pitch screw 5 beam warp bearing supports 11 and coupling 12 are connected by key pin, coupling 12 and the dynamical element transferring power of joining.When 5 rotations of Variable pitch screw, liquid pushes forward along the thread helix line tracking to extruding mouthfuls 2 from suction port 6 under screw thread flank of tooth thrust, because the volume of each helical pitch cavity volume 3 reduces with the shorten length of helical pitch, and liquid is incompressible and push the just steady increase of hydraulic pressure fast forward.Thrust is come balance by bearing support 11 on 5 of the Variable pitch screws in liquid pushes.5 of Variable pitch screws are such with the pump housing 1 sealing: Sealing 9 and Sealing 8 double seals tightly are enclosed within on 5 of the Variable pitch screws, and Sealing 9 edges are enclosed within the Sealing 8.Sealing 8 is pressed by cover plate 10 and is fixed on the pump housing 1.The pump housing 1, bearing support 11 are fixed by support 17 and 16 respectively.

The technical characterstic of pumps such as the comprehensive plunger pump of the utility model, centrifugal pump utilizes translation and rotates composite motion, and liquid pushes forward according to the thread helix line tracking under screw thread flank of tooth thrust.Because of from suction port to extruding mouthful, each helical pitch of Variable pitch screw by etc. difference successively decrease, the volume of each helical pitch cavity volume reduces with the helical pitch shorten length, and the incompressible and quick propelling movement of liquid, reaches conveying fluid pressure height, flow is big, the effect that applicability is wide.

Accompanying drawing has provided embodiment of the present utility model:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a sealing mechanism schematic representation on the utility model Topland.

Below in conjunction with accompanying drawing the utility model is described in further detail:

With reference to Fig. 1, coupling 12 and the dynamical element transferring power of joining, bearing support 11, the pump housing 1 are fixed by support 16 and support 17 respectively.Variable pitch screw 5 beam warp bearing supports 11 and coupling 12 are connected by key pin.5 of Variable pitch screws adopt double seal with the pump housing 1, and annular seal 9 and end cover type Sealing 8 tightly are enclosed within on 5 of the Variable pitch screws, and Sealing 9 edges are enclosed within the Sealing 8.Sealing 8 is pressed by cover plate 10 and is fixed on the pump housing 1.5 screw portions of outlet pressure Variable pitch screw according to 19.6Mpa are determined 4 helical pitches.Successively decrease by 10 millimeters to the length that extrudes mouthful 2 each helical pitch from suction port 6, be followed successively by 100 millimeters, 90 millimeters, 80 millimeters, 70 millimeters.The volume of each helical pitch content cavity 3 is followed successively by 1 liter, 0.8 liter, 0.6 liter, 0.4 liter with the length of helical pitch.With reference to Fig. 2, have the guide groove consistent 15 on the thread end face 4 with the thread helix line tracking, guide groove 15 is square grooves, in the guide groove 15 by the sealing mechanism of forming by Sealing 13 and shell fragment 14 7.Shell fragment 14 is fixed on the bottom land of guide groove 15, and jacking Sealing 13, Sealing 13 are close to the pump housing 1 inner periphery, plays the effect that prevents that liquid from flowing backwards.The shape of Sealing 13 shapes and guide groove 15 matches.

When 5 rotations of Variable pitch screw, liquid pushes forward along the thread helix line tracking to extruding mouthfuls 2 from suction port 6 under screw thread flank of tooth thrust, because each helical pitch cavity volume 3 volume reduces with the shorten length of helical pitch, and liquid is incompressible and push the just steady increase of hydraulic pressure fast forward.Thrust is come balance by bearing support 11 on 5 of the Variable pitch screws in liquid pushes.

Claims

1. Variable pitch screw high-pressure service pump, comprise the pump housing, suction port, extrusion mouth, it is characterized in that: the Variable pitch screw [5] that is loaded in the pump housing [1] is divided into 3-5 helical pitch from suction port [6] to pressure mouthful [2], the length of each helical pitch by etc. difference successively decrease, the volume of each helical pitch content cavity [3] is with the descending variation of the length of helical pitch, have the guide groove consistent [15] on the thread end face [4], the sealing mechanism of being made up of Sealing [13] and shell fragment [14] [7] is arranged in the guide groove [15] with the thread helix line tracking.

2. Variable pitch screw high-pressure service pump according to claim 1, it is characterized in that: shell fragment [14] is with the bottom land that fixes on guide groove [15], and jacking Sealing [13], Sealing [13] are close to the pump housing [1] inner periphery.

3. Variable pitch screw high-pressure service pump according to claim 1 is characterized in that guide groove [15] can be a square groove, also can be half slot, and the shape of Sealing [13] shape and guide groove [15] matches.