CN211525102U

CN211525102U - Direct-coupled centrifugal pump

Info

Publication number: CN211525102U
Application number: CN201921989524.2U
Authority: CN
Inventors: 郝永旺
Original assignee: Guangzhou Zhongkai Pump Co ltd
Current assignee: Guangzhou Zhongkai Pump Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-09-18
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses a direct-coupled centrifugal pump, which comprises a pump body, an impeller, a connecting frame and a motor, wherein the interior of the motor is rotationally connected with a pump shaft through a clamping joint, one end of the pump shaft, which is far away from the motor, is fixedly connected with the impeller through a key groove matching, the motor is close to the outer side of one end of the impeller and is fixedly connected with the connecting frame through a bolt, the utility model realizes the primary sealing of liquid in the pump body through the pump cover in the using process of the centrifugal pump, the sealing effect of the centrifugal pump is greatly enhanced through the mechanical sealing through the gap between the impeller and the pump cover, the problems of the reduction of the lift of the centrifugal pump and the corrosion of the motor caused by the leakage in the using process of the centrifugal pump are prevented, the axial force between the mechanical sealing and the pump cover is used for preventing the impeller and the pump shaft connected with the impeller from, prevent the pump shaft from generating abrasion and vibration due to the play.

Description

Direct-coupled centrifugal pump

Technical Field

The utility model relates to a centrifugal pump technical field specifically is associated mode centrifugal pump.

Background

The centrifugal pump is a pump for conveying a liquid by a centrifugal force generated when an impeller rotates, and operates by causing water to centrifugally move by the rotation of the impeller. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to rotate at a high speed, the water is thrown to the outer edge of the impeller and flows into a water pressing pipeline of the water pump through a flow channel of the volute pump shell, and the centrifugal pump is basically composed of the impeller, a pump body, a pump cover, a water retaining ring, a pump shaft, a bearing and a sealing ring.

However, the conventional centrifugal pump has some disadvantages in use, such as:

1. the existing centrifugal pump is easy to leak when conveying liquid, so that centrifugal water flow formed by rotation of impellers in a pump body leaks from a leakage part, the lifting force of the liquid is insufficient when the liquid flows out from a water outlet, the water yield of the centrifugal pump is small, the water outlet stroke is shortened, and meanwhile the leaked liquid is easy to damage a motor at the rear.

2. When the existing centrifugal pump is used, in the operation process of the centrifugal pump, liquid enters the impeller under low pressure and flows out under high pressure, so that the pressures on two sides of the impeller are unequal, axial thrust pointing to the inlet direction is generated, a rotor is caused to axially move, and abrasion and vibration are generated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a associated mode centrifugal pump to solve the problem that provides among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the direct-coupled centrifugal pump comprises a pump body, an impeller, a connecting frame and a motor, wherein the motor is internally connected with a pump shaft in a rotating mode through a clamping mode, one end, away from the motor, of the pump shaft is fixedly connected with the impeller through a key groove in a matching mode, the motor is close to the outer side of one end of the impeller and is fixedly connected with the connecting frame through a bolt, one end, away from the connecting frame, of the motor is fixedly connected with the pump body through a bolt, the pump body is connected with the inner wall of the connecting position of the connecting frame through a clamping mode and is fixedly connected with a pump cover, a mechanical seal is connected between the pump.

Furthermore, the pump body, the impeller, the connecting frame and the pump cover are made of stainless steel, the stainless steel has good oxidation resistance and certain corrosion resistance to oxidizing acids, and the pump cover also has certain corrosion resistance to alkaline solutions and most of organic acids and inorganic acids.

Furthermore, a spiral liquid channel is formed in the inner cavity of the pump body and used for collecting liquid thrown out from the impeller and guiding the liquid to the water outlet.

Furthermore, the joint of the motor and the pump shaft is fixedly connected with an axial thrust bearing through clamping for balancing axial force.

Furthermore, the joint of the connecting frame and the pump body is fixedly connected with a sealing ring through clamping for waterproof sealing.

Further, the mechanical seal is composed of a friction pair, an auxiliary sealing ring and a spring and is used for preventing the conveying liquid from leaking.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a mechanical seal and pump cover that set up have realized in the centrifugal pump use, carry out preliminary sealing through the liquid of pump cover in with the pump body, further sealed through mechanical seal in the space between impeller and the pump cover for centrifugal pump sealing effect is strengthened greatly, prevents to leak in the centrifugal pump use and causes the problem that the lift of centrifugal pump descends and corrode the motor.

2. The utility model discloses a mechanical seal, pump cover and axial thrust bearing that set up have realized in the centrifugal pump use, through the axial effort between mechanical seal and the pump cover, prevent that the impeller and the pump shaft of connecting the impeller from taking place the axial float, compensate axial power through axial thrust bearing simultaneously, prevent that the pump shaft float from producing wearing and tearing and vibration.

Drawings

FIG. 1 is a schematic sectional view of the overall front view structure of the present invention;

FIG. 2 is a schematic sectional view of the impeller of the present invention;

FIG. 3 is an enlarged schematic view of the front view structure of the connection frame of the present invention;

FIG. 4 is an enlarged schematic view of the left side view structure of the connecting frame of the present invention;

FIG. 5 is a schematic view of the pump body of the present invention in a sectional view;

fig. 6 is the left view structure enlarged schematic diagram of the pump body of the present invention.

In FIGS. 1-6: 1-a water inlet; 2-a pump body; 3-an impeller; 4-water outlet; 5-a connecting frame; 6, a motor; 7-a pump shaft; 8-pump cover; 9-mechanical sealing.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a direct connection type centrifugal pump comprises a pump body 2, an impeller 3, a connecting frame 5 and a motor 6, wherein the inside of the motor 6 is rotatably connected with a pump shaft 7 through clamping, one end of the pump shaft 7, far away from the motor 6, of the impeller 3 is fixedly connected with the impeller 3 through key groove matching, the motor 6 is used for doing work to liquid, the outer side of one end, close to the impeller 3, of the motor 6 is fixedly connected with the connecting frame 5 through bolts, the motor 6 is connected with the pump body 2, one end, far away from the motor 6, of the connecting frame 5 is fixedly connected with a pump cover 8 through bolts, the pump cover 8 is used for sealing the pump body 2, a mechanical seal 9 is fixedly connected between the pump cover 8 and the outer wall of the impeller 3 through clamping, the pump body 2 is further sealed, one end, far away from the impeller 3, of the pump, the center of the top of the pump body 2 is provided with a water outlet 4 for water outlet.

The pump body 2, impeller 3, link 5 and pump cover 8 are stainless steel material, stainless steel material has good oxidation resistance, have certain corrosion resistance to oxidizing acid, also have certain corrosion resistance to aqueous alkali and most organic acid and inorganic acid, the spiral liquid way has been seted up on the 2 inner chambers of the pump body, a liquid for collecting to throw away from impeller 3, and lead to delivery port 4, motor 6 and pump shaft 7 junction are through joint fixedly connected with axial thrust bearing, be used for balancing the axial force, link 5 and the 2 junctions of the pump body are through joint fixedly connected with sealing washer, be used for waterproof sealing, mechanical seal 9 is by the friction pair, supplementary sealing washer and spring are constituteed, be used for preventing to carry the liquid leakage.

The working principle is as follows: when the liquid-spraying centrifugal pump is used, liquid is filled in the pump body 2 before the pump is started, when the pump shaft 7 and the impeller 3 are driven to rotate by the motor 6, the liquid moves circularly along with the impeller 3, and is thrown out from the center to the outer periphery of the impeller 3 under the action of centrifugal force, the liquid obtains pressure energy and speed energy from the impeller 3, and when the liquid is thrown out from the impeller 3, the central part of the impeller 3 causes the pressure difference between a low-pressure area and the pressure of the sucked liquid level, so that the liquid is continuously sucked and is discharged at a certain pressure.

In the centrifugal pump use, carry out preliminary sealing through pump cover 8 with the liquid in the pump body 2, further sealed through mechanical seal 9 in the space between impeller 3 and pump cover 8 for centrifugal pump sealing effect strengthens greatly, prevents to leak in the centrifugal pump use and causes the problem that centrifugal pump's lift descends and corrode the motor.

In the use process of the centrifugal pump, the impeller 3 and the pump shaft 7 connected with the impeller are prevented from axially moving by the axial acting force between the mechanical seal 9 and the pump cover 8, and meanwhile, the axial force is compensated by the axial thrust bearing, so that the pump shaft 7 is prevented from being abraded and vibrated due to movement.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Associated mode centrifugal pump, including the pump body (2), impeller (3), link (5) and motor (6), its characterized in that: motor (6) is inside to be connected with pump shaft (7) through the joint rotation, motor (6) one end is kept away from through keyway cooperation fixedly connected with impeller (3) in pump shaft (7), motor (6) are close to impeller (3) one end outside and pass through bolt fixedly connected with link (5), motor (6) one end is kept away from through bolt fixedly connected with pump body (2) in link (5), pass through joint fixedly connected with pump cover (8) on the position inner wall is connected with link (5) pump cover (2), through joint fixedly connected with mechanical seal (9) between pump cover (8) and impeller (3) outer wall, impeller (3) one end is kept away from in pump body (2) and water inlet (1) has been seted up, delivery port (4) have been seted up to pump body (2) top central authorities.

2. The centrifugal direct-coupled pump of claim 1, wherein: the pump body (2), the impeller (3), the connecting frame (5) and the pump cover (8) are made of stainless steel.

3. The centrifugal direct-coupled pump of claim 1, wherein: the inner cavity of the pump body (2) is provided with a spiral liquid channel.

4. The centrifugal direct-coupled pump of claim 1, wherein: the motor (6) and the pump shaft (7) are connected with an axial thrust bearing through clamping and fixing.

5. The centrifugal direct-coupled pump of claim 1, wherein: the joint of the connecting frame (5) and the pump body (2) is fixedly connected with a sealing ring in a clamping manner.

6. The centrifugal direct-coupled pump of claim 1, wherein: the mechanical seal (9) consists of a friction pair, an auxiliary sealing ring and a spring.