CN204312363U - A kind of high temperature resistant magnetic force driving pump - Google Patents

Abstract

The utility model discloses a high temperature resistant magnetic drive pump, which comprises a pump body, a pump cover, a drive shaft and a connecting frame. The pump body is provided with a pump shaft, the front end of the pump shaft is connected with an impeller, and the pump cover is connected with the rear end of the pump body. , the two ends of the pump shaft are set in the pump body through bearings, the right end of the pump shaft is connected with the outer magnetic rotor, the drive shaft is equipped with an inner magnetic rotor, a spacer sleeve is provided between the inner magnetic rotor and the outer magnetic rotor, and the connecting frame and The end of the isolation sleeve forms a seal, the isolation sleeve is made of superconducting material, ceramics or plastics, and the opening direction of the isolation sleeve faces the direction of the drive shaft. The utility model has the advantages of simple structure and convenient use, which can eliminate the problem of "locking" of the main shaft of the bearing, which causes fracture of the pump shaft, improves the ability of the isolation sleeve to withstand working pressure, is resistant to high temperature, and has a long service life.

Description

A high temperature resistant magnetic drive pump

technical field

The utility model relates to the field of drive shafts, in particular to a high temperature resistant magnetic drive pump.

Background technique

The prior art magnetic pump includes a pump body, a pump cover, a pump shaft, an impeller, an inner magnetic rotor, a spacer sleeve, an outer magnetic rotor, a connecting frame, and a drive shaft. The inner magnetic rotor is installed on the shaft end of the pump shaft, and the spacer sleeve and the pump The cover is sealed and fixedly connected to seal the pump shaft and the inner magnetic rotor. The outer magnetic rotor is installed on the drive shaft. The outer magnetic rotor cooperates with the inner magnetic rotor in the isolation sleeve to drive the inner magnetic rotor and the pump shaft to rotate, thereby realizing the non-contact power transfer.

In the prior art magnetic pump, the inner magnetic rotor is installed on the shaft end of the pump shaft, the outer magnetic rotor is installed on the drive shaft, the spacer sleeve is sealed and fixedly connected with the pump cover to seal the pump shaft and the inner magnetic rotor, and the spacer sleeve bears the inner cavity. Pressure action, that is, the tension action of the isolation sleeve under the pressure of the inner cavity. In order to improve the pressure (tension) bearing capacity of the isolation sleeve, it is necessary to thicken the wall thickness of the isolation sleeve and select excellent materials to manufacture the isolation sleeve, which also increases the manufacturing cost accordingly. When a metal isolation sleeve is used, the isolation sleeve cuts the magnetic force line to generate magnetic eddy current loss, which emits a large amount of heat energy, which increases the temperature of the isolation sleeve area, and easily causes cavitation. Moreover, the magnetic drive pump in the prior art may be "manually" operated negligently, and the magnetic drive pump is not filled with liquid, or the pipeline is blocked, causing the magnetic drive pump to be in a "liquid cut off" state, so that the main shaft runs at high speed and the bearing and spacer sleeve on the pump cover. The bearings rub against the sliding surface. Since there is no liquid in the pump chamber, the high-temperature heat generated by the sliding friction of the main shaft cannot be taken away in time, causing the main shaft to break and the isolation sleeve to break. Once the isolation sleeve is broken, the medium will leak, pollute the environment, and even catch fire and explode, causing major economic losses.

Utility model content

The purpose of this utility model is to provide a high-temperature-resistant magnetic drive pump with simple structure and convenient use, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the utility model provides the following technical solutions:

A high temperature resistant magnetic drive pump, including a pump body, a pump cover, a drive shaft and a connecting frame, the pump body is provided with a pump shaft, the front end of the pump shaft is connected to an impeller, and the pump cover is connected to the rear of the pump body The two ends of the pump shaft are set in the pump body through bearings. The right end of the pump shaft is connected with an outer magnetic rotor, and the drive shaft is provided with an inner magnetic rotor. The sleeve, the connecting frame and the end of the isolation sleeve form a seal, the isolation sleeve is made of superconducting material, ceramics or plastic, and the opening direction of the isolation sleeve faces the direction of the drive shaft.

As a further solution of the utility model: the bearing is an over-pressure silicon carbide bearing.

Compared with the prior art, the beneficial effect of the utility model is: the two ends of the pump shaft are provided with pneumatic silicon carbide bearings, which are supported at both ends of the pump shaft, and the sliding surface friction at both ends of the rotor is changed to linear friction, effectively The surface-to-surface contact is converted into point-to-point contact, the friction force is reduced, the temperature rise of the bearing is small, and the problem of "locking" the main shaft caused by the bearing is eliminated, which leads to the fracture of the pump shaft, and the problem of pump damage caused by the dry running of the magnetic drive pump is fundamentally eliminated possibility. The opening of the spacer sleeve faces the direction of the drive shaft, which makes the spacer sleeve bear the external pressure, that is, the spacer sleeve changes from the original tensile force under the pressure of the inner cavity to the external pressure, so that the spacer sleeve relatively greatly improves the working pressure ability, which improves the ability to be used in high-pressure (high head or pump chamber pressure) working conditions. The isolation sleeve is made of superconducting materials, ceramics or plastics. When the driver is running at high speed, the isolation sleeve will not generate eddy currents and release heat , and the increase in temperature will cause demagnetization of the magnet, so the utility model has a longer service life.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1. In the embodiment of the present utility model, a high-temperature-resistant magnetic drive pump includes a pump body 1, a pump cover 2, a drive shaft 8 and a connecting frame 6. It is characterized in that the pump body 1 is provided with The pump shaft 5, the front end of the pump shaft 5 is connected with the impeller 3, the pump cover 2 is connected to the rear end of the pump body 1, the two ends of the pump shaft 5 are arranged in the pump body 1 through the bearing 4, and the bearing 4 It is an over-pressure silicon carbide bearing, and the air pressure silicon carbide bearing 4 enables both ends of the pump shaft to support it, changing the sliding surface friction at both ends of the rotor to line friction, effectively converting the surface-to-surface contact into point-to-point contact, and the friction force The temperature rise of the bearing is small, and the problem of "locking" of the pump shaft 5 by the bearing 4 is eliminated, which causes the pump shaft 5 to break, and the possibility of pump damage caused by the dry running of the magnetic drive pump is fundamentally eliminated.

The right end of the pump shaft 5 is connected with an outer magnetic rotor 10, the drive shaft 8 is provided with an inner magnetic rotor 9, and a spacer 7 is arranged between the inner magnetic rotor 9 and the outer magnetic rotor 10, and the connecting frame 6 and The end of the spacer sleeve 7 forms a seal, and the opening direction of the spacer sleeve 7 faces the direction of the drive shaft. It enables the isolation sleeve 7 to bear the external pressure, that is, the isolation sleeve 7 is changed from the original tensile force under the pressure of the inner cavity to the external pressure, so that the isolation sleeve 7 relatively greatly improves the ability to withstand working pressure, and improves the service life. Due to the ability to use under high-pressure head or high pump cavity pressure, the isolation sleeve 7 is made of superconducting materials, ceramics or plastics. When the driver is running at high speed, the isolation sleeve 7 will not generate eddy currents and release heat, and the temperature will rise. It will lead to demagnetization of the magnet, so the utility model has a long service life.

Claims (2)

1. A high temperature resistant magnetic drive pump, comprising a pump body (1), a pump cover (2), a drive shaft (8) and a connecting frame (6), characterized in that the pump body (1) is provided with a pump shaft (5), the impeller (3) is connected to the front end of the pump shaft (5), the pump cover (2) is connected to the rear end of the pump body (1), and the two ends of the pump shaft (5) pass through bearings ( 4) Set in the pump body (1), the right end of the pump shaft (5) is connected with an outer magnetic rotor (10), the drive shaft (8) is provided with an inner magnetic rotor (9), and the inner magnetic rotor ( A spacer (7) is provided between 9) and the outer magnetic rotor (10), the connecting frame (6) and the end of the spacer (7) form a seal, and the spacer (7) is made of superconducting material, ceramic or plastic As a result, the opening direction of the spacer sleeve (7) faces the direction of the drive shaft. 2. A high temperature resistant magnetic drive pump according to claim 1, characterized in that the bearing (4) is an overpressure silicon carbide bearing.