CN205260238U

CN205260238U - Axial plunger pump

Info

Publication number: CN205260238U
Application number: CN201520541125.5U
Authority: CN
Inventors: 岳艺明; 黎贻晨
Original assignee: Hangzhou Lvju Technology Co Ltd
Current assignee: Hangzhou Lvju Technology Co Ltd
Priority date: 2015-07-24
Filing date: 2015-07-24
Publication date: 2016-05-25
Anticipated expiration: 2025-07-24

Abstract

The utility model discloses an axial plunger pump, its technical scheme main points be including the pump body with wear to establish the pump shaft of the pump body, the cover is equipped with the bearing on the pump shaft, on the pump shaft still the cover be equipped with sealing device, sealing device sets gradually along pump shaft one end with the bearing, sealing device divide into the bearing side with axial plunger pump and the pump sending is inclined. Sealing device includes oil blanket, water seal and the support ring of wearing to establish the pump shaft, the pump shaft surface is all hugged closely in oil blanket and water seal, inner wall of the pump body is hugged closely to the support ring outer fringe, and the support ring inner edge sticiss oil blanket and water seal. Compare with current axial plunger pump, when the medium is the not good medium of water or other greasy properties, owing to the reason antifriction bearing's that lubricates use receives the restriction. This technical scheme adopts antifriction bearing to support the main shaft, and sealing device makes the bearing side can use glossy cunning the space separation of plunger pump both sides, can prevent that the impurity in the pump sending medium from invading the bearing side. The pump sending side can adopt the aqueous medium, can reduce the cleanliness requirement of plunger pump to the medium.

Description

A kind of axial plunger pump

Technical field

The utility model relates to a kind of axial plunger pump, and more particularly, it relates to a kind of plunger displacement pump with sealing device.

Background technology

Pump is dynamical element and the core parts of pressure system, therefore its design and researchp is had and important meaning. Pump structure form mainly comprises plunger type, vane type, gear type, and the sealing effectiveness of vane type and gear type pump is poor, and volumetric efficiency is low, leaks serious in the situation that operating pressure improves. The crucial friction pair of three couples of conventional plunger pump structure comprises plunger and cylinder hole, piston shoes and swash plate, valve plate and cylinder body end face, it is all face contact, therefore sealing effectiveness is relatively better, under the operating mode of and low viscosity medium higher in pressure ratio, can ensure higher volumetric efficiency, and with respect to vane type and gear type pump, friction pair has lower PV value. Therefore, existing pump has adopted the structure of plunger type mostly.

Because plunger displacement pump has the characteristic of transferring high voltage, superhigh pressure liquid medium, it is widely used in numerous areas. Can guarantee that the plunger in motion normally works in the process of transmitting high pressure, superhigh pressure liquid medium, its sealing device is most important, existing plunger displacement pump generally adopts hydrostatic bearing to support, in the time that medium is water, the hydrostatic bearing of plunger displacement pump is had relatively high expectations to the cleannes of water quality, if may cause the situation of the even stuck inefficacy of bearing wear when water cleaning degree is lower, it cannot adapt to the poor environment of water cleaning degree, exists and needs improved weak point.

Utility model content

The deficiency existing for prior art, the purpose of this utility model is to provide a kind of scope of application wider, and medium degree of purity is required to lower plunger displacement pump.

For achieving the above object, the utility model provides following technical scheme: a kind of axial plunger pump, comprise the pump housing and the pump shaft that wears the pump housing, on described pump shaft, be arranged with bearing, be also arranged with sealing device on described pump shaft, sealing device and bearing set gradually along pump shaft one end, described sealing device comprises the oil sealing, water seal and the support ring that wear pump shaft, pump shaft surface is all close in described oil sealing and water seal, and described support ring outer rim is close to pump housing inwall, and support ring Inner edge presses oil sealing and water seal.

The utility model is further set to: described support ring comprises interior ring and outer shroud, and described interior ring is between oil sealing and water seal, and described outer shroud presses oil sealing and water seal.

The utility model is further set to: on described interior ring Inner edge, offer cannelure, described support ring radially offers the through hole being connected with interior ring cannelure, and described through hole extends to support ring outer rim back to pump shaft one end port.

The utility model is further set to: in described outer shroud outer rim, offer cannelure, described through hole two-port is communicated with respectively outer shroud cannelure and interior ring cannelure.

The utility model is further set to: in described outer shroud outer rim, be provided with and somely lay respectively at outer shroud cannelure both sides for the cannelure and this cannelure that are embedded sealing ring.

By adopting technique scheme, compared with adopting hydrostatic bearing support with existing plunger displacement pump, the technical program adopts rolling bearing, position at adjacent bearing arranges sealing device, the space of plunger displacement pump both sides is separated, sealing device adopts oil sealing and water seal to compress by support ring, make space, both sides can use different media, bearing one side adopts oil as lubricant, be conducive to reach better lubricant effect, pumping one side adopts water or other media, reduce the cleannes requirement of plunger displacement pump to medium, avoid can causing when lower because of medium cleannes the generation of the even stuck failure conditions of bearing wear, be conducive to expand the scope of application of plunger displacement pump.

Brief description of the drawings

Fig. 1 is the structural representation of a kind of axial plunger pump of the utility model;

Fig. 2 is the partial sectional view of the hermetically-sealed construction embodiment of a kind of axial plunger pump of the utility model;

Fig. 3 is the structural representation of the utility model embodiment pump shaft and sealing device;

Fig. 4 is the structure cutaway view of the utility model embodiment pump shaft and sealing device;

Fig. 5 is the partial enlarged drawing of the hermetically-sealed construction embodiment of a kind of axial plunger pump of the utility model.

Reference numeral: 1, pump shaft; 2, the pump housing; 3, support ring; 31, cannelure; 32, through hole; 33, interior ring cannelure; 34, outer shroud; 35, interior ring; 4, oil sealing; 5, water seal; 6, sealing ring.

Detailed description of the invention

Referring to figs. 1 through Fig. 5, the embodiment of a kind of axial plunger pump of the utility model is described further.

A kind of axial plunger pump, comprise the pump housing 2 and the pump shaft 1 that wears the pump housing 2, on pump shaft 1, be arranged with bearing, bearing adopts common angular contact ball bearing and taper roll bearing, is also arranged with sealing device on pump shaft 1, and sealing device and bearing set gradually along pump shaft 1 one end, sealing device comprises the oil sealing 4, water seal 5 and the support ring 3 that wear pump shaft 1, pump shaft 1 surface is all close in oil sealing 4 and water seal 5, and support ring 3 outer rims are close to the pump housing 2 inwalls, and support ring 3 Inner edge press oil sealing 4 and water seal 5. Support ring 3 comprises interior ring 35 and outer shroud 34, and interior ring 35 and outer shroud 34 are wholely set, and described interior ring 35 is between oil sealing 4 and water seal 5, and outer shroud 34 presses oil sealing 4 and water seal 5, and the thickness of outer shroud 34 equals interior ring 35, oil sealing 4 and water seal 5 threes' thickness sum.

On interior ring 35 Inner edge, offer cannelure 33, support ring 3 radially offers the through hole 32 being connected with interior ring cannelure 33, and described through hole 32 extends to support ring 3 outer rims back to pump shaft 1 one end port. In outer shroud 34 outer rims, offer cannelure 31, through hole 32 two-port are communicated with respectively outer shroud cannelure 31 and interior ring cannelure 33. In outer shroud 34 outer rims, be provided with and somely lay respectively at outer shroud cannelure 31 both sides for the cannelure 31 and this cannelure 31 that are embedded sealing ring 6. In reality processing, be respectively provided with two in outer shroud cannelure 31 both sides for being embedded the cannelure 31 of sealing ring 6, in support ring 3 outer rims, between each cannelure 31, coaxially arrange, and the deep equality of each cannelure 31.

As long as oil sealing 4 and water seal 5 are the gap between close pump shaft 1 surface of sealing and sealing device, gap between the main sealing pump housing 2 inwalls of sealing ring 6 and sealing device in outer shroud 34 outer rims, due to actual condition, sealing cannot reach effect very, in the time of the fluid of oil sealing 4 one sides or the water liquid of water seal 5 one sides generation infiltration, by cannelure 33 and the through hole 32 of interior ring 35 Inner edge, on the pump housing 2, be provided with the outage being connected with through hole 32 on support ring 3, the liquid that can whereby infiltration be come in is discharged.

Compared with existing axial plunger pump, in the time that medium is the bad medium of water or other greasy properties, because the use of lubricated reason rolling bearing is restricted, sliding bearing is higher for the requirement of medium, the technical program adopts roller bearings main shaft, and in the position of adjacent bearing, sealing device being set, axial plunger pump is divided into bearing side and pumping side by sealing device. Sealing device adopts oil sealing 4 and water seal 5 to compress by support ring 3, makes space, both sides can use different media, and bearing side can be used oil lubrication, is conducive to reach better lubricant effect, can prevent that the impurity in pumped medium from invading bearing side. Pumping side can adopt aqueous medium to adopt water as medium, reduces the cleannes requirement of plunger displacement pump to water quality, avoids can causing when lower because of water cleaning degree the generation of the even stuck failure conditions of bearing wear, is conducive to expand the scope of application of plunger displacement pump.

The above is only preferred embodiment of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection domain of the present utility model. It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims

1. an axial plunger pump, comprise the pump housing and the pump shaft that wears the pump housing, on described pump shaft, be arranged with bearing, it is characterized in that, on described pump shaft, be also arranged with sealing device, sealing device and bearing set gradually along pump shaft one end, described sealing device comprises the oil sealing, water seal and the support ring that wear pump shaft, pump shaft surface is all close in described oil sealing and water seal, and described support ring outer rim is close to pump housing inwall, and support ring Inner edge presses oil sealing and water seal.

2. a kind of axial plunger pump according to claim 1, is characterized in that, described support ring comprises interior ring and outer shroud, and described interior ring is between oil sealing and water seal, and described outer shroud presses oil sealing and water seal.

3. a kind of axial plunger pump according to claim 2, it is characterized in that, on described interior ring Inner edge, offer cannelure, described support ring radially offers the through hole being connected with interior ring cannelure, and described through hole extends to support ring outer rim back to pump shaft one end port.

4. a kind of axial plunger pump according to claim 3, is characterized in that, in described outer shroud outer rim, offers cannelure, and described through hole two-port is communicated with respectively outer shroud cannelure and interior ring cannelure.

5. a kind of axial plunger pump according to claim 4, is characterized in that, is provided with somely to lay respectively at outer shroud cannelure both sides for the cannelure and this cannelure that are embedded sealing ring in described outer shroud outer rim.