CN211009144U - Centrifugal self-priming pump - Google Patents

Abstract

The utility model provides a centrifugal self priming pump belongs to fluid machinery technical field. It has solved current centrifugal self priming pump seal structure's damage can lead to the motor to intake and bring a series of problems such as electric leakage unit short circuit. This centrifugal self priming pump, including the motor, pump head and the spiral case that mutually support and set up, the pivot of motor stretches into in the pump head and has linked firmly the transmission cover at the tip, is provided with the bush between transmission cover and the pump head inner wall, and the outlet has been seted up with the bottom cooperation of bush to the pump head, and the inside of transmission cover is fixed with the adapter sleeve, and the center of adapter sleeve has linked firmly the countershaft, and the countershaft stretches into in the spiral case and installs centrifugal impeller at the tip. The utility model discloses the pivot of motor not with carry medium direct contact, the influence of the transport medium that has prevented temperature frequent change to sealing device on the motor makes its life longer, the bush be convenient for after this contact surface wearing and tearing in later stage only need change the bush alright, the outlet of below makes liquid outflow prevent that the inside liquid accumulation of pump head is too much and get into the motor.

Description

Centrifugal self-priming pump

Technical Field

The utility model belongs to the technical field of fluid machinery, a water pump, in particular to centrifugal self priming pump is related to.

Background

The self priming pump is a centrifugal pump that need not be filled with water in the suction line and just can be automatic to water uptake up, the motor shaft all can with the liquid direct contact of carrying behind the installation impeller among the pump head structure of present self priming pump, inside the sealed effect of shaft seal device such as rethread installation mechanical seal realized preventing liquid to get into the motor, this kind of structure of problem is not had to the transport of conventional liquid, but in the transport of hot and cold water, because the temperature variation range of transport medium is very big, its sealing performance of seal structure is in the cold and hot state of continuous transform descends very easily, and ageing speed accelerates greatly and damages, and the damage of seal structure can lead to the motor to intake and bring a series of problems such as electric leakage unit short circuit.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide one kind and make motor shaft and transport medium directly keep apart the better longer centrifugal self priming pump of life of whole security performance.

The purpose of the utility model can be realized by the following technical proposal: the utility model provides a centrifugal self priming pump, includes motor, pump head and the spiral case that mutually supports and set up, its characterized in that, the pivot of motor stretches into in the pump head and has linked firmly the transmission cover at the tip, transmission cover and pump head inner wall between be provided with the bush, the outlet has been seted up in the cooperation of the bottom of pump head and bush, the inside of transmission cover is fixed with the adapter sleeve, the center of adapter sleeve has linked firmly the countershaft, the countershaft stretch into in the spiral case and install centrifugal impeller at the tip.

In the centrifugal self-priming pump, the connecting sleeve is fixedly connected with a balance block inside, and the balance block is sleeved outside the auxiliary shaft and connected through a flat key.

In the centrifugal self-priming pump, a sealing ring is arranged between the balance block and the auxiliary shaft, and one end of the sealing ring is abutted against the volute through a sealing gasket.

In the centrifugal self-priming pump, the volute and the pump head are connected through the cover plate, the cover plate is provided with a circle of annular groove, the axial protrusion at the rear part of the impeller forms a circle of limiting step matched with the annular groove, and the limiting step is clamped in the annular groove.

In the centrifugal self-priming pump, a cavity structure is arranged between the transmission sleeve and the connecting sleeve and is clamped, matched and fixed in a key groove mode.

Compared with the prior art, this self priming pump motor's pivot is connected with the transmission sleeve and is realized the transmission of torsion, looping through the transmission sleeve, adapter sleeve and countershaft transmit torsion for the impeller, make the pivot of motor not with the transport medium direct contact, the influence of the transport medium that has effectively prevented frequent change in temperature to sealing device on the motor makes its life longer, and is further, through set up the bush between transmission sleeve and pump head, it is alright only to change the bush after this contact surface wearing and tearing in the later stage of being convenient for, and when too big messenger's liquid gets into the pump head when the inside pressure of spiral case, make the outflow of liquid through the outlet of below prevent that the inside liquid accumulation of pump head is too much and get into the motor, be favorable to the water pump design of high-power high.

Drawings

Fig. 1 is a structural sectional view of the self-priming pump of the present invention.

In the figure, 1, a motor; 2. a pump head; 3. a volute; 4. a transmission sleeve; 5. a bushing; 6. a water outlet; 7. connecting sleeves; 8. a counter shaft; 9. an impeller; 10. a counterbalance; 11. a seal ring; 12. sealing gaskets; 13. a cover plate; 14. and a limiting step.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figure 1, the centrifugal self-priming pump comprises a motor 1, a pump head 2 and a volute 3 which are matched with each other, wherein a rotating shaft of the motor 1 extends into the pump head 2 and is fixedly connected with a transmission sleeve 4 at the end part, the torsion of the motor 1 is directly transmitted to the transmission sleeve 4, a lining 5 is arranged between the transmission sleeve and the inner wall of the pump head, a water outlet 6 is arranged at the bottom of the pump head 2 and the lining 5 in a matching way, the lining 5 is longer in length and can play a certain sealing effect, and is convenient to replace after later-period abrasion, liquid flows out through the water outlet 6 below to prevent the liquid in the pump head from being accumulated too much to enter the motor, the design of a high-power high-lift water pump is facilitated, the liquid entering the position is not easy to reach the motor 1, a connecting sleeve 7 is fixed inside the transmission sleeve 4, the center of the connecting sleeve 7 is fixedly, the torsion is transmitted to the impeller 9 through the transmission sleeve 4, the connecting sleeve 7 and the auxiliary shaft 8, and the liquid is sucked from the water inlet of the volute 3 and then discharged from the water outlet by the high-speed rotation of the impeller 9.

Furthermore, the inside of adapter sleeve 7 has linked firmly balancing piece 10, and this balancing piece 10 cover is located the countershaft 8 and is connected through the flat key outward, because countershaft 8 rocks easily when its length overlength for shaft-like structure, can play the effect of supporting fixed countershaft 8 through the setting of balancing piece 10 to it is more stable to drive countershaft 8 synchronous revolution messenger's operation.

Further, a sealing ring 11 is arranged between the balance weight 10 and the auxiliary shaft 8, one end of the sealing ring 11 abuts against the volute 3 through a sealing gasket 12, and the auxiliary shaft 8, the pump head 2 and the impeller 9 are sealed through the matching of the sealing ring 11 and the sealing gasket 12.

Further, in order to enable the impeller 9 to rotate more stably, the volute 3 is connected with the pump head 2 through the cover plate 13, a circle of annular groove is formed in the cover plate 13, a circle of limiting step 14 matched with the annular groove is formed in the axial direction of the rear portion of the impeller 9 in a protruding mode, the limiting step 14 is clamped in the annular groove, the structure of the impeller 9 is firmer through the structure, deformation of blades outside the impeller 9 is prevented, the cover plate 13 and the volute 3 can be formed in a separated mode through the structure, and the annular groove at the milling position inside the cover plate is facilitated.

Furthermore, there is the cavity structure between transmission cover 4 and the adapter sleeve 7 and establish the cooperation through the keyway type card and fix, because the area of contact of each inside part of pump head 2 is all great, can reduce thermal transmission through the setting of this cavity structure, prevent that the motor 1 pivot from producing the change because of the change of transport medium temperature.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the motor 1, the pump head 2, the volute 3, the transmission sleeve 4, the bushing 5, the water discharge opening 6, the connection sleeve 7, the auxiliary shaft 8, the impeller 9, the balance weight 10, the sealing ring 11, the sealing gasket 12, the cover plate 13, the limit step 14, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (5)

1. The utility model provides a centrifugal self priming pump, includes motor (1), pump head (2) and spiral case (3) that mutually support and set up, its characterized in that, the pivot of motor (1) stretches into in pump head (2) and has linked firmly transmission cover (4) at the tip, transmission cover (4) and pump head (2) inner wall between be provided with bush (5), outlet (6) have been seted up in the cooperation of the bottom of pump head (2) and bush (5), the inside of transmission cover (4) is fixed with adapter sleeve (7), the center of adapter sleeve (7) has linked firmly countershaft (8), countershaft (8) stretch into in spiral case (3) and install centrifugal impeller (9) at the tip.

2. A centrifugal self-priming pump according to claim 1, characterized in that the connecting sleeve (7) is fixedly connected with a balance weight (10), and the balance weight (10) is sleeved outside the auxiliary shaft (8) and connected by a flat key.

3. A centrifugal self-priming pump according to claim 2, characterized in that a sealing ring (11) is provided between the balance weight (10) and the auxiliary shaft (8), and one end of the sealing ring (11) abuts against the volute (3) through a sealing gasket (12).

4. The centrifugal self-priming pump of claim 1, wherein the volute (3) is connected with the pump head (2) through a cover plate (13), the cover plate (13) is provided with a ring of annular grooves, a ring of limiting steps (14) matched with the annular grooves are formed by axial projections at the rear of the impeller (9), and the limiting steps (14) are clamped in the annular grooves.

5. A centrifugal self-primer pump according to claim 1, characterized in that a cavity structure is present between the driving sleeve (4) and the connecting sleeve (7) and is fixed by a key-groove type snap fit.

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