CN203081849U

CN203081849U - Impeller anti-dropping device for pump

Info

Publication number: CN203081849U
Application number: CN 201220745029
Authority: CN
Inventors: 张青亮; 李建国
Original assignee: SHIJIAZHUANG LIANHE SHENGXIN PUMP INDUSTRY Co Ltd
Current assignee: SHIJIAZHUANG LIANHE SHENGXIN PUMP INDUSTRY Co Ltd
Priority date: 2012-12-31
Filing date: 2012-12-31
Publication date: 2013-07-24
Anticipated expiration: 2022-12-31

Abstract

The utility model discloses an impeller anti-dropping device for a pump. The impeller anti-dropping device is used for fixing an impeller and preventing the impeller from dropping. The impeller anti-dropping device comprises a pump shaft and the impeller which is connected onto the pump shaft through a flat key, an impeller cap which is in threaded connection with the pump shaft to jack the impeller is arranged at a shaft end of the pump shaft, a screw connected with the pump shaft is arranged on the impeller cap, a threaded hole matched with the screw is formed in the center position, corresponding to a shaft end face of the pump shaft, of the impeller cap, a threaded groove matched with the screw is formed in the shaft end of the pump shaft, an O-shaped sealing ring is arranged on a contact face of the impeller cap and the screw, and an O-shaped sealing ring is further arranged on a contact face of the impeller cap and the impeller. The connecting screw is arranged between the pump shaft and the impeller cap which is arranged on the pump shaft and in threaded connection with the pump shaft to jack the impeller, secondary fixation can be carried out on the impeller cap and the pump shaft through the screw, a phenomenon that the impeller drops from the pump shaft due to the fact that the impeller cap inversely rotates in a pump rotating process is effectively avoided, and normal use and operation of a pump can be guaranteed.

Description

The impeller of pump anti-drop device

Technical field

The utility model relates to a kind of impeller of pump protective equipment, is dredging pump impeller anti-drop device in a kind of large-scale cabin specifically.

Background technique

Pump is used widely in daily production and various fields in life, and play an important role therein, adopting the pump great majority of common configuration form is centrifugal pump, and traditional centrifugal impeller of pump does not allow to reverse when operation, otherwise impeller may come off from pump shaft, influences the use of centrifugal pump.

Most centrifugal pump impeller and pump shaft mainly are connected and fixed by flat key; impeller set is contained on the pump shaft; the outer end of pump shaft is provided with the impeller cap by being threaded; living impeller by the impeller crown can not move axially it; impeller cap and pump shaft are by being threaded when normal rotation; the impeller cap is to change tighter and tighter; yet when when centrifugal pump startup just or centrifugal pump disorderly closedown, causing the unit counter-rotating; if centrifugal pump counter-rotating; the rotation direction of impeller cap is opposite with the normal sense of rotation of centrifugal pump; the impeller cap is easy to spin down, and causes impeller to come off.Therefore in sum, the core of a centrifugal pump is exactly an impeller, and fixing impeller prevents that impeller from coming off, and is vital for assurance centrifugal pump proper functioning.

The model utility content

The utility model technical issues that need to address have provided a kind of structural stability, in conjunction with impeller of pump anti-drop device firm, easy to loading and unloading.

For solving the problems of the technologies described above, the technological scheme that the utility model adopted is:

A kind of impeller of pump anti-drop device, comprise pump shaft, be connected impeller on the pump shaft by flat key, the impeller cap that the axle head setting of pump shaft is threaded with pump shaft and withstands impeller, the screw that is connected with pump shaft is set on the described impeller cap, the central position of the corresponding pump shaft axial end of described impeller cap is provided with the tapped hole that matches with screw, the axle head of described pump shaft is provided with the thread groove that matches with screw, and the surface of contact of described impeller cap and screw, impeller cap and impeller all is provided with the O RunddichtringO.

The further improvement of the utility model concrete structure is: described O RunddichtringO material is a silica gel.

Because the technological progress of having adopted technique scheme, the utility model to obtain is:

The utility model is the impeller of pump anti-drop device, this device adopts pump shaft and between the impeller cap that withstands impeller on the pump shaft by being threaded attachment screw is set, impeller cap and pump shaft can be carried out secondary by screw fixes, effectively avoided the impeller cap counter-rotating in the pump rotary course, to occur and caused impeller, guaranteed normally using and moving of pump from the phenomenon that pump shaft comes off.

The axle head that this impeller of pump anti-drop device is provided with tapped hole and pump shaft with the central position of the corresponding pump shaft axial end of impeller cap is provided with the thread groove of coupling, not only make screw and impeller cap, pump shaft is corresponding and coupling, and adopt the form that is threaded simpler, convenient in the cargo handling process of impeller, impeller cap, pump shaft, save the time, saved manpower and materials.

The surface of contact of the impeller cap of this impeller of pump anti-drop device and screw, impeller cap and impeller all is provided with the O RunddichtringO that material is a silica gel.This O RunddichtringO and impeller cap constitute the one Sealing, better tightness, when effectively guaranteeing impeller in the pump housing and pump shaft high speed rotating, lubricant oil leaks outside and introduced contaminants is difficult for entering pump housing inside in the pump, has prevented the impeller that causes thus and the service wear of pump shaft.

Description of drawings

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

Wherein, 1, impeller, 2, pump shaft, 3, impeller cap, 4, tapped hole, 5, screw, 6, the O RunddichtringO, 7, thread groove, 8, flat key.

Embodiment

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

A kind of impeller of pump anti-drop device, shown in accompanying drawing 1, the axle body of the pump shaft 2 of dredging pump is provided with flat key 8, and impeller 1 is sleeved on the axle body of pump shaft 2, and fixing by flat key 8; The axle head of pump shaft 2 is provided with outside thread, and the shaft end of pump shaft 2 sets out the thread groove 7 that is complementary with screw 5 outside threads; Impeller cap 3 is fixed by the axle head of outside thread and pump shaft 2, and the central position that impeller cap 3 is corresponding with pump shaft 2 axial end offers the tapped hole 4 that matches with screw 5 internal threads; Screw 5 is threaded by the impeller cap 3 that installs and with the axle head of pump shaft 2, and being provided with material on the surface of contact of the surface of contact of impeller cap 3 and screw 5 and impeller cap 3 and impeller 1 is silica gel O RunddichtringO 6.

Installation of the present utility model and working procedure are as described below:

The installation of dredging pump, at first the impeller 1 with dredging pump is sleeved on the pump shaft 2, impeller 1 is fixing with pump shaft 2 by flat key 8, then pump shaft 2 axle heads in impeller 1 outside by thread set on impeller cap 3, make impeller cap 3 and impeller 1 apical grafting, be connected with the thread groove 7 of the corresponding pump shaft 2 in tapped hole 4 centers of impeller cap 3 by the tapped hole 4 on the impeller cap 3 with screw 5 at last.

When causing the unit counter-rotating when dredging pump startup or disorderly closedown, the pump shaft 2 of dredging pump stops rapidly by static beginning fast rotational or by fast rotational.Because effect of inertia, impeller cap 3 can form opposite motion with respect to pump shaft 2, since impeller cap 3 moving direction and impeller 1 and pump shaft 2 to screw direction opposite, thereby it is loosening impeller cap 3 to occur, and then impeller cap 3 and impeller 1 come off in succession, when between impeller cap 3 and pump shaft 2 axle heads by screw 5 fixing after, can lock impeller cap 3, fastening force can be offset because impeller cap 3 and pump shaft 2 relative displacements that inertia produces prevent that impeller cap 3 and impeller 1 from coming off from pump shaft 2.

Claims

1. impeller of pump anti-drop device, comprise pump shaft (2), be connected impeller (1) on the pump shaft (2) by flat key (9), the impeller cap (3) that the axle head setting of pump shaft (2) is threaded and withstands impeller (1) with pump shaft (2), it is characterized in that: described impeller cap (3) is gone up the screw (5) that is connected with pump shaft (2) is set, the central position of the corresponding pump shaft of described impeller cap (3) (2) axial end is provided with the tapped hole (4) that matches with screw, the axle head of described pump shaft (2) is provided with the thread groove (7) that matches with screw, described impeller cap (3) and screw (5), impeller cap (3) all is provided with O RunddichtringO (6) with the surface of contact of impeller (1).

2. impeller of pump anti-drop device according to claim 1 is characterized in that: described O RunddichtringO (6) material is a silica gel.