CN203051102U

CN203051102U - High-temperature cantilever-type dual-screw pump

Info

Publication number: CN203051102U
Application number: CN 201320067301
Authority: CN
Inventors: 袁道幸
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-23
Filing date: 2013-01-23
Publication date: 2013-07-10
Anticipated expiration: 2023-01-23

Abstract

The utility model discloses a high-temperature cantilever-type dual-screw pump which mainly comprises a pump body, master and slave swivel nuts, a main shaft, an auxiliary shaft, sliding bearings and the like. The high-temperature cantilever-type dual-screw pump is characterized in that the sliding bearings are designed at the left shaft extending parts of the main shaft and the auxiliary shaft, so that the clearance requirement between the swivel nuts and the inner wall of the pump body is ensured, and the pump unit runs safely and reliably.

Description

High temperature cantilever type two screw pump

One, technical field

The utility model relates to screw pump, relates in particular to high temperature cantilever type two screw pump.

Two, background technique

Change problem inconvenient, that assembly precision is difficult for assurance for the swivel nut that solves two screw pump, the applicant applied for " a kind of cantilever type two screw pump " on February 25th, 2008 to Patent Office of the People's Republic of China, and the patent No. is ZL200820007743.1.But find in using that during greater than the high temperature media more than 300 ℃, rate of fault is very high for delivery temperature, its reason is:

In the screw pump technical specification, it is very strict that the gap between swivel nut and the pump housing inwall requires.Because being cantilever position, swivel nut is installed in main shaft and from axle, when main shaft and after the axle temperature distortion, just may cause swivel nut to produce radial displacement, thereby make the gap between swivel nut and the pump housing inwall change, even swivel nut appears and pump housing inwall comes in contact, so that at high temperature can't use.

Three, summary of the invention

The purpose of this utility model provides a kind of high temperature cantilever type two screw pump of conveying material at high temperature.

The technical solution of the utility model is achieved in that

The high temperature cantilever type two screw pump of forming by the pump housing, principal and subordinate's swivel nut, main shaft, from critical pieces such as axle, sliding bearings is at described main shaft and designed sliding bearing from the left shaft extension position of axle.

The bearing shell inwall of described sliding bearing adopts graphite solid to make.

The utility model compared with prior art, its advantage is:

Adopted the assist location of sliding bearing owing to main shaft, from axle, be subjected to temperatures involved, main shaft in the running reaches from the radial deformation of axle generation or beats and obtains constraint by sliding bearing, the radial displacement that is installed in main shaft and the swivel nut from the axle has obtained effective control, thereby guaranteed the gap requirement between swivel nut and the pump housing inwall, the pump assembly operation is safer reliable.

Four, description of drawings

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 1 is sectional view of the prior art;

Fig. 2 the utility model sectional view.

Five, embodiment

Referring to accompanying drawing 2, it is by the pump housing (1), swivel nut (2), main shaft (3), form from axle (4), sliding bearing (5), cover plate (6), sealing (7), bearing (8), gear (9), gear-box critical pieces such as (10).Main shaft (3), supported by front and back bearings (8) from axle (4), transmitting moment of torsion by gear (9).Sealing (7) is isolated from the outside pump chamber.Gear (9) is installed in the gear-box (10) with bearing (8).The swivel nut (2) that one pair has a positive and negative helicoid is installed in main shaft (3) respectively and from axle (4), under dynamic action with the coaxial antiport of doing.Sliding bearing (5) is installed in described main shaft and from the left shaft extension position of axle, to reach the effect of at high temperature carrying out assist location.The bearing shell inwall of sliding bearing adopts graphite solid to make.

Claims

By the pump housing, principal and subordinate's swivel nut, main shaft, from the high temperature cantilever type two screw pump that critical pieces such as axle, sliding bearing are formed, it is characterized in that, at described main shaft and designed sliding bearing from the left shaft extension position of axle.
2. by the described high temperature cantilever type of claim 1 two screw pump, it is characterized in that the bearing shell inwall of sliding bearing adopts graphite solid to make.