CN2826060Y

CN2826060Y - Improved rigid coupling for condensed water pump

Info

Publication number: CN2826060Y
Application number: CN 200520044432
Authority: CN
Inventors: 施勇; 王者文; 顾剑刚; 杜晓雯
Original assignee: Shanghai Kaiquan Pump Group Co Ltd
Current assignee: Shanghai Kaiquan Pump Group Co Ltd
Priority date: 2005-08-23
Filing date: 2005-08-23
Publication date: 2006-10-11
Anticipated expiration: 2015-08-23

Abstract

The utility model relates to an improved rigid coupling for a condensed water pump, which comprises a first shaft, a second shaft, a sleeve coupling, keys and cutting sleeves, wherein the shaft extension ends of the first shaft and the second shaft are respectively provided with annular slots, and key slots are arranged on the shaft extension surface; the cutting sleeves are clamped in the annular slots at the shaft extension ends of the first shaft and the second shaft to cause the two shafts to be axially connected; the sleeve coupling is arranged in an outer ring of the shaft extension end, the key slots are arranged in an inner hole of the sleeve coupling, and fixing bolts which are fixedly connected with the shafts are arranged on the sleeve coupling; the keys are arranged in the key slots on the shaft extension surface and the key slots on the sleeve coupling. The utility model adopts the rigid connection model of the two shafts and has the advantages of simple structure, easy component manufacture, convenient assembly and disassembly, good shafting coaxiality and good rigidity, axial direction and circumferential direction are both fixed, thus effectively transmitting axial force and torque, and a pump is safe when the pump runs. The rigid coupling of the utility model can be applied to other pumps with similar structures besides a vertical multi-stage barrel and bag type condensate pump.

Description

Condensate pump modified model rigid coupling

Technical field

The utility model relates to condensate pump, the modified model rigid coupling on particularly a kind of vertical type multilevel barrel pocket type condensate pump.

Background technique

Vertical type multilevel barrel pocket type condensate pump is applicable to the water of condensation of carrying in thermoelectricity or the nuclear power plant's vapour condenser, is one of capital equipment of power plant, and it is very high to reliability requirement.This condensate pump is the vertical multi-stage structure, and in general, axle is made up of for three sections pump shaft, transmission shaft and motor shaft, come transmitting torque and axial force by the appropriate rigidity Placement, make prime mover identical, turn to identically, promptly reach the supporting effect of rotating speed with the rotating speed of pump.Rigid coupling is exactly one of critical component of this pump.

Coupling connects the principle of axle, should consider simple in structurely, and part is easily processed, preferably can utilize some standard piece, mounting or dismounting are convenient, consider how to make coupling centering accurately reliable again, guarantee that to greatest extent diaxon coaxality and axle are rigidity, transfer larger torque and axial force.In addition, it is also very important that coupling connects the reliability of axle construction.

Common rigid coupling has following several structure at present:

One, bush whorl connects coupling (referring to Fig. 1)

This coupler structure is simple, and is easy to manufacture, and radial dimension is little, generally is used for the connection of underloading small size axle.The coaxality and the rigidity of axle system depend on sleeve 13 threaded interior hole machining accuracies and spindle nose outside thread machining accuracy.Must consider during design pump turn to and thread rotary orientation between relation.The shortcoming of this coupling is that motor and pump all can not reverse, and connected diaxon 11,12 easily gets loose during counter-rotating, and axial dimension is changed, and pump impeller and blower inlet casing are collided, and vibration or friction accident take place easily.

Two, the sleeve flat key connects coupling (referring to Fig. 2)

This coupling is made up of key 24, fastening screw trip bolt 25 and sleeve 23, by the key transmitting torque, by fastening screw trip bolt axial restraint sleeve, this Placement is simple in structure, part processing is easy, mounting or dismounting are convenient, and the coaxality of axle system guarantees by the fit tolerance between fixed cover and two spindle noses 21,22 fully, but accuracy of alignment is poor, axle is that rigidity is relatively poor, can not transmit axial force, it is upward unreliable that fastening screw trip bolt is fixed on axle, easily loosening, thereby sleeve is glided, cause diaxon to separate, pump produces vibration or friction, is prone to accidents.

Three, flange coupling (referring to Fig. 3)

This coupling mainly is made up of with the bolt 35 that is connected them two half-couplings 33 that are divided in axle 31,32 ends.The flange coupling accuracy of alignment is reliable, and is bigger with key 34 transmitting torques, can not transmit axial force.This coupler structure is fairly simple, and mounting or dismounting are convenient, and axle is the machining accuracy that coaxality depends on half-coupling convex shoulder and groove.But the shortcoming that this coupling exists is that the radial dimension of flange is bigger, and is bigger to the area of passage influence, is not suitable for condensate pump and other diameter and connects to the axle system of size requirement compactness.

Summary of the invention

The utility model is under the situation of having analyzed above-mentioned different rigidity coupler structure pros and cons, a kind of condensate pump modified model rigid coupling is provided, it has solved above-mentioned existing coupling axle is that rigidity is relatively poor, can not transmit axial force, and problems such as vibration or friction accident take place easily.

The technical solution of the utility model is as follows:

A kind of condensate pump modified model rigid coupling, it comprises first and second, sleeve and key, it also comprises cutting ferrule; Described first and second shaft extension end is respectively equipped with circular groove, and the shaft extension surface Machining has keyway; Described cutting ferrule be clipped on first with second shaft extension end circular groove in two axles axially are connected; Described sleeve is mounted in the box coupling of shaft extension end outer ring, and the endoporus of box coupling is provided with keyway, and the set screw affixed with axle is housed on the box coupling; Described key is installed in shaft extension keyway and the box coupling keyway.

The utility model is in conjunction with the actual conditions of vertical type multilevel barrel pocket type condensate pump, design a kind of modified model rigid coupling, take the mode that is rigidly connected of two sections axles, its simple structure, part processing is easy, mounting or dismounting are convenient, axle is that coaxality is good, good rigidly, and axial and circumferencial direction all has fixing, can transmit axial force and moment of torsion effectively, safe and reliable during pump operation.

Rigid coupling of the present utility model also can be applicable to the pump of other similar structure except being applied to vertical type multilevel barrel pocket type condensate pump.

Description of drawings

Fig. 1 is that the bush whorl of prior art connects the coupler structure schematic representation.

Fig. 2 is that the sleeve flat key of prior art connects the coupler structure schematic representation.

Fig. 3 is the flange coupling structural representation of prior art.

Fig. 4 is the structural representation of a kind of condensate pump of the present utility model with the modified model rigid coupling.

Fig. 5 is the cutting ferrule structural representation in Fig. 4 rigid coupling.

Fig. 6 is by left view shown in Figure 5.

Fig. 7 is the box coupling structural representation in Fig. 4 rigid coupling.

Fig. 8 is by left view shown in Figure 7.

Embodiment

Referring to Fig. 4, the utility model is a kind of condensate pump modified model rigid coupling, it is equipped with parts such as a pair of cutting ferrule 43, box coupling 44, set screw 45, circlip 46 and key 47, and coupling is installed on first 41 and second 42 the shaft extension end.First 41 and second 42 shaft extension end is respectively equipped with circular groove, and the shaft extension surface Machining has keyway.

In conjunction with referring to Fig. 5 and Fig. 6, cutting ferrule 43 is clipped in first 41 and second 42 the shaft extension end circular groove, makes it to match, and thus two

axles

41,42 is axially coupled together, and has guaranteed the coaxality and the rigidity of axle system.

In conjunction with referring to Fig. 7 and Fig. 8, box coupling 44 is installed in the outer ring of shaft extension end.The endoporus of box coupling 44 is provided with keyway 441, and key 47 is installed in shaft extension keyway and box coupling 44 keyways 441.

As shown in Figure 4, set screw 45 is housed on the box coupling 44, is processed with tapped hole on the key 47, set screw 45 is screwed in the tapped hole on the key 47, by set screw 45 box coupling 44, key 47 and axle are fixed up firmly, thereby guarantee the reliability of coupling.The transmission of moment of torsion realizes by key 47, and realizes axial force transmission by a pair of cutting ferrule 43.

As shown in Figure 4, the side of box coupling 44 is equipped with circlip 46, and circlip 46 can guarantee that pump prevents after set screw 45 lost efficacy that in the course of the work box coupling 44 from gliding, and has an accident avoiding.

During the utility model assembling, at first box coupling is passed first, and guarantee that first key on the shaft extension matches with keyway on the box coupling, box coupling moved to left reserve the circular groove position, again a pair of cutting ferrule is put into first and second shaft extension end circular groove, first and second is coupled together; Secondly box coupling is moved to right to circlip, make first and second to be rigidly connected, and guarantee that the key on first and second shaft extension matches with keyway on the box coupling by box coupling; Then set screw is passed in the box coupling through hole, be screwed in the tapped hole corresponding on the key, and fully tighten, box coupling is securely fixed on the axle, guarantee two shaft concentricities and coupling stiffness.

More than all embodiments only for the explanation the utility model usefulness, but not to restriction of the present utility model, those skilled in the art of the present technique are under the situation that does not break away from spirit and scope of the present utility model, can also make various conversion or variation, so all technological schemes that are equal to should belong to category of the present utility model and limited by each claim.

Claims

1. condensate pump modified model rigid coupling, it comprises first and second, and sleeve and key is characterized in that, and it also comprises cutting ferrule; Described first and second shaft extension end is respectively equipped with circular groove, and the shaft extension surface Machining has keyway; Described cutting ferrule be clipped on first with second shaft extension end circular groove in two axles axially are connected; Described sleeve is mounted in the box coupling of shaft extension end outer ring, and the endoporus of box coupling is provided with keyway, and the set screw affixed with axle is housed on the box coupling; Described key is installed in shaft extension keyway and the box coupling keyway.

2. condensate pump modified model rigid coupling according to claim 1 is characterized in that the side of described box coupling is equipped with circlip.