CN209294121U - Centrifugal pump impeller anti-reverse-rotation structure - Google Patents

Abstract

The utility model proposes a kind of centrifugal pump impeller anti-reverse-rotation structure, rear end sets the first fixing groove in the middle part of impeller, and the head of pump shaft is screwed in the first fixing groove；The front end on the head of pump shaft sets thread groove；Front end in the middle part of impeller has a mounting surface, sets the second fixing groove at mounting surface, is connected to the first fixing groove；Impeller bolt is protruded into the second fixing groove by the front end of impeller and is screwed togather in thread groove and with thread groove；Fixed disk is set on impeller bolt, is bonded with mounting surface；Sealing element is set between fixed disk and impeller；Third fixing groove is set on mounting surface, the side end of fixed disk presses in third fixing groove.The utility model can be carried out the locking operation of impeller bolt at the inlet flange of pump, intuitive visible；The head of pump shaft is screwed in the first fixing groove, and impeller bolt is screwed in thread groove, realizes that double thread is self-locking；The side end of fixed disk presses in third fixing groove, realizes clamping and locking to impeller, achievees the effect that prevent reversion.

Description

Centrifugal pump impeller anti-reverse-rotation structure

Technical field

The utility model relates to be centrifuged pump technical field, specifically a kind of centrifugal pump impeller anti-reverse-rotation structure.

Background technique

Centrifugal pump refers to the centrifugal force by generating when impeller rotation to convey the pump of liquid, mainly by impeller, the pump housing, pump Axis, bearing, sealing ring and stuffing-box etc. are constituted.Its main feature include: it is compact-sized, flow lift range is wide, and flow is equal Even, smooth running, the installation of with small vibration and equipment, Maintenance and Repair expense are more low.

Existing centrifugal pump, which is usually pumped, drives pump shaft rotation by driving machine, and pump shaft drives the impeller rotation of pump, and impeller is to defeated The fluid acting sent, increases fluid energy, achievees the purpose that trandfer fluid.However when driving machine is shut down, driving machine and pump Axis stops rotating immediately, and impeller is formed opposite reversion since inertia still rotates between such impeller and pump shaft, is easy Cause impeller to fall off, causes the damage of pump.

Utility model content

The utility model proposes a kind of centrifugal pump impeller anti-reverse-rotation structure, solves centrifugal pump impeller in the prior art and stopping Opposite reversion is formed when machine between pump shaft, the problem of being easy to cause impeller to fall off, cause the damage of pump.

The technical solution of the utility model is achieved in that

The middle part rear end of a kind of centrifugal pump impeller anti-reverse-rotation structure, including pump shaft and impeller, the impeller is provided with indent The first fixing groove, the head of the pump shaft is screwed in first fixing groove；

The front end on the head of the pump shaft is provided with the thread groove of indent；

The front end at the middle part of the impeller has a mounting surface, and second that an indent is provided at the mounting surface is fixed Slot, second fixing groove are connected to first fixing groove；

One impeller bolt protruded into second fixing groove by the front end of impeller and in thread groove and with the thread groove spiral shell It closes；Fixed disk is provided on the impeller bolt, the fixed disk is bonded with the mounting surface；The fixed disk and the impeller Between sealing element is set；

The third fixing groove of indent is provided on the mounting surface, the side end of the fixed disk is pressed fixes into the third In slot.

Further, the front end at the middle part of the impeller has a sunken slot, and the mounting surface is located inside the sunken slot.

Further, the sealing element is sealing ring, has a sealed groove on the mounting surface, the sealing ring is set to In the sealed groove.

Further, first fixing groove includes internal inside groove and external outer groove, and the internal diameter of the inside groove is less than The internal diameter of the outer groove forms first step in the junction of the inside groove and the outer groove；

The head of the pump shaft has to be resisted against described with the matched second step of the first step, the second step On First.

Further, the impeller bolt takes all of column cap and shank of bolt, the end of the socket cap be arranged in hex slot；Institute It states fixed disk and is located at the socket cap and shank of bolt junction.

The utility model has the following beneficial effects:

The design of the utility model structure is simple, easy to use；It can be carried out impeller bolt at the inlet flange of pump Locking operation, it is intuitive visible；The head of pump shaft is screwed in the first fixing groove, and impeller bolt is screwed in thread groove, is realized double Screw thread self-locking；The side end of fixed disk presses in third fixing groove, realizes clamping and locking to impeller, and reaching prevents reversion Effect.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram of the utility model one embodiment.

Wherein:

1, pump shaft；2, impeller；3, blade；4, the first fixing groove；5, thread groove；6, mounting surface；7, the second fixing groove；8, solid Price fixing；9, socket cap；10, shank of bolt；11, interior hex slot；12, sealing element；13, sealed groove；14, third fixing groove；15, it falls into Slot；16, inside groove；17, outer groove；18, first step；19, second step.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figure 1, the centrifugal pump impeller anti-reverse-rotation structure in the present embodiment, including pump shaft 1 and impeller 2, set on impeller 2 Set blade 3.The middle part rear end of the impeller 2 is provided with the first fixing groove 4 of indent, and the head of the pump shaft 1 is screwed on described In first fixing groove 4；The front end on the head of the pump shaft 1 is provided with the thread groove 5 of indent.

The front end at the middle part of the impeller 2 has a mounting surface 6, and mounting surface 6 here is plane, at the mounting surface 6 It is provided with the second fixing groove 7 of an indent, second fixing groove 7 is connected to first fixing groove 4；Here second is fixed The internal diameter of slot 7 is less than the first fixing groove 4, because the first fixing groove 4 is used to accommodate pump shaft 1, and the second fixing groove 7 can pass through admittedly Surely impeller bolt.

One impeller bolt protruded into second fixing groove 7 by the front end of impeller 2 and in thread groove 5 and with the thread groove 5 screw togather；Fixed disk 8 is provided on the impeller bolt, the fixed disk 8 is bonded with the mounting surface 6, here, the fixation Disk 8 is disk；In the present embodiment, the impeller bolt takes all of column cap 9 and shank of bolt 10, in the end setting of the socket cap 9 Hex slot 11 is used for installation and removal impeller bolt；The fixed disk 8 is located at the socket cap 9 and 10 junction of shank of bolt.

Sealing element 12 is set between the fixed disk 8 and the impeller 2, and in the present embodiment, the sealing element 12 is sealing It encloses, there is a sealed groove 13, and the sealed groove 13 is looped around at the port of second fixing groove 7 on the mounting surface 6, The sealing ring is set in the sealed groove 13.

The third fixing groove 14 of indent is provided on the mounting surface 6, the side end of the fixed disk 8 is pressed into the third In fixing groove 14, for example pressing can be realized by the way of punching press.

In the present embodiment, the front end at the middle part of the impeller 2 has a sunken slot 15, and the mounting surface 6 is located at the sunken slot Inside 15.It is fallen into slot 15 in this way, the socket cap 9 of impeller bolt is placed in this, avoids socket cap 9 exposed.

In the present embodiment, first fixing groove 4 includes the outer groove 17 of internal inside groove 16 and outside, the inside groove 16 Internal diameter is less than the internal diameter of the outer groove 17, forms first step 18 in the junction of the inside groove 16 and the outer groove 17；It is described The head of pump shaft 1, which has, is resisted against described first with the matched second step 19 of the first step 18, the second step 19 On platform.This set can act as the effect of limit on radial and axial.

When the present embodiment is installed, first impeller 2 and pump shaft 1 are screwed togather together, sealing ring is put into after screwing, then by impeller Bolt is protruded into second fixing groove 7 by the front end of impeller 2 and is screwed on pump shaft 1, is screwed, at this time fixed disk 8 and installation Face 6 is bonded；Then the side end of mounting disc is pressed in the third fixing groove 14 with stamping tool, realizes and clamps and lock, Achieve the effect that anti-reverse.The present embodiment can be carried out the locking operation of impeller bolt at the inlet flange of pump, intuitively may be used See；The head of pump shaft 1 is screwed in the first fixing groove 4, and impeller bolt is screwed in thread groove 5, realizes that double thread is self-locking.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (5)

1. a kind of centrifugal pump impeller anti-reverse-rotation structure, including pump shaft and impeller, which is characterized in that

The middle part rear end of the impeller is provided with the first fixing groove of indent, and it is fixed that the head of the pump shaft is screwed on described first In slot；

The front end on the head of the pump shaft is provided with the thread groove of indent；

The front end at the middle part of the impeller has a mounting surface, and the second fixing groove of an indent, institute are provided at the mounting surface The second fixing groove is stated to be connected to first fixing groove；

One impeller bolt is protruded into second fixing groove by the front end of impeller and is screwed togather in thread groove and with the thread groove；Institute It states and is provided with fixed disk on impeller bolt, the fixed disk is bonded with the mounting surface；Between the fixed disk and the impeller Sealing element is set；

The third fixing groove of indent is provided on the mounting surface, the side end of the fixed disk is pressed into the third fixing groove It is interior.

2. a kind of centrifugal pump impeller anti-reverse-rotation structure as described in claim 1, which is characterized in that before the middle part of the impeller End has a sunken slot, and the mounting surface is located inside the sunken slot.

3. a kind of centrifugal pump impeller anti-reverse-rotation structure as claimed in claim 2, which is characterized in that the sealing element is sealing It encloses, there is a sealed groove on the mounting surface, the sealing ring is set in the sealed groove.

4. a kind of centrifugal pump impeller anti-reverse-rotation structure as claimed in claim 3, which is characterized in that first fixing groove includes Internal inside groove and external outer groove, the internal diameter of the inside groove is less than the internal diameter of the outer groove, in the inside groove and the outer groove Junction formed first step；

The head of the pump shaft, which has, is resisted against described first with the matched second step of the first step, the second step On platform.

5. a kind of centrifugal pump impeller anti-reverse-rotation structure as claimed in claim 4, which is characterized in that the impeller bolt takes all of column Interior hex slot is arranged in head and shank of bolt, the end of the socket cap；The fixed disk is located at the socket cap and connect with shank of bolt Place.