A spiral rotor pump

Abstract

The helical rotor pump is a portable mobile medium delivery pump that can adapt to the delivery medium that is as viscous as honey and asphalt, or as thin as water. The pump uses a stainless steel helical rotor and a multi-arm wheel coated with high-strength plastic material to couple. The plastic bushing of the helical rotor reduces the rotation gap while ensuring the dynamic seal during the rotation of the helical rotor, thereby achieving a high head similar to that of a multi-stage pump. Thanks to the stainless steel material of the pump body and the isolation of the hydraulic motor package from the transmission medium, the helical rotor chemical delivery pump can select acid and alkali resistant sealing materials when necessary to achieve the transfer and delivery of chemicals.

Description

Technical Field

[0001] The helical rotor pump is a portable, mobile, high-lift delivery pump that is resistant to corrosion by chemical liquid media. Background Art

[0002] At present, the system of medium conveying pumps mainly includes axial flow pumps, centrifugal pumps, screw pumps, rotor pumps, etc. Axial flow pumps and mixed flow pumps have large flow rates, but limited head. The head of a centrifugal pump is generally low. The multi-stage impeller is gradually accelerated to accelerate the dilute fluid medium to a higher initial velocity to obtain a larger initial velocity to increase the head, but it is not applicable to viscous conveying media. Positive displacement pumps that convey viscous media, such as screw pumps and rotor pumps, generally have a larger volume, and the mechanical processing requirements between the coupled screws are harsh and the cost is high. Some may require full head laying, which is obviously not applicable for work occasions that require rapid movement. Because the rotor pump also involves the coupling between the rotors, the manufacturing tolerance is greatly limited, and there are extremely strict operating procedures for installation and commissioning. If it conveys media containing particles or solid-liquid two phases such as sewage and dirty oil, it will accelerate wear and failure, and the subsequent maintenance cost is extremely high. Moreover, since both of them have a transition between discharging and absorbing liquid each time they do work, there will be obvious pulsating water flows, which also puts more requirements on the oil pipeline. Summary of the invention

[0003] The present invention utilizes the structural principle of the rotational motion of a spatial helix and a circular tangent to invent a helical rotor pump with a single-power compound motion seal. The helical rotor pump combines the high-speed operation of a centrifugal pump with the high pressure and high head characteristics of a positive displacement pump. It uses a hydraulic motor as a source power element to drive the helical rotor to move. The movement of the helical rotor is transmitted to the multi-arm wheel through curved surface coupling. The multi-arm wheel rotates with the rotation of the helical rotor. The two realize dynamic sealing of the conveying medium in mutual coupling, thereby achieving a greater outlet pressure and maintaining it continuously, so that it can convey more viscous media. The hydraulic motor provides a higher torque capacity, thereby realizing the smooth conveying of viscous media or solid-liquid mixed media under high head and high pressure.

[0004] Significant benefits

[0005] The helical rotor pump of the present invention uses a hydraulic motor, which can provide convenient stepless speed regulation. The hydraulic power station can actively and adaptively adjust according to the working conditions of the conveying medium, which can effectively reduce energy consumption. The hydraulic motor reduces the mass-power ratio of the product, effectively reduces the volume and weight of the equipment, which is conducive to meeting the requirements of rapid mobile deployment and use. The helical rotor pump of the present invention encapsulates the standard hydraulic motor, effectively reducing the research and development costs. At the same time, after the hydraulic motor is encapsulated, the entire pump set can adapt to more complex and harsher operating environments, and with sealing rings of appropriate materials, it can be used in the transportation of various chemicals.

[0006] The helical rotor pump of the present invention couples a stainless steel helical rotor with a plastic-coated part to achieve a dynamic gap seal, thereby increasing the outlet pressure of the pump without increasing the rotation speed. Combined with the strong torque power of the hydraulic motor, a large flow rate can be provided while maintaining a high head curve.

[0007] The helical rotor pump of the present invention has a water injection pipe added to the medium inlet or outlet, which can provide appropriate boundary lubrication when conveying viscous media. If hot water is used, the conveying medium can be heated while providing boundary lubrication. Electric heating can also be used to purely heat the conveying medium to improve fluidity and reduce boundary friction between the viscous medium and the conveying pipe wall, thereby improving its conveying capacity.

[0008] In the implementation case of the helical rotor pump of the present invention for conveying fresh water or other non-corrosive liquid media, the helical rotor and the multi-arm wheel disc can use aluminum alloy / plastic paired materials, and use a high-speed hydraulic motor to achieve a larger flow rate of medium conveying. In some cases, the multi-arm wheel disc can be omitted, thereby reducing rotating parts and enhancing reliability. In the implementation case of conveying a solid-liquid mixed medium with obvious abrasive properties, the helical rotor can use wear-resistant materials such as high-silicon cast iron. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 As shown, the spiral rotor (part 1) is installed in a vertical position through the shaft hole. The spiral rotor is connected to the hydraulic motor (part 3) and fixed to the pump housing by bolts. The spiral rotor (part 1) transmits the rotational motion of the hydraulic motor (part 3) and converts the rotational motion into the rotational motion of the multi-arm wheel (part 2) around its own axis through its inherent curved surface coupling. The spiral rotor (part 1) and the multi-arm wheel (part 2) constitute the basic rotational motion combination of the spiral rotor pump. The fluid medium enters from the lower inlet flange of the pump housing (part 5), is accelerated by the spiral medium, and is thrown out from the upper outlet (part 6) pipe of the pump housing. The hydraulic motor protective cover (part 7) isolates the ordinary hydraulic motor from the conveying medium, thereby reducing the damage to the hydraulic motor caused by the corrosiveness of the conveying medium and ensuring the normal operation of the system.

[0010] Figure 2 As shown, the spiral rotor (part 1) has a conical surface that matches the main shaft compartment (part 11), and an end face water seal (part 12) is arranged on the end face of the spiral rotor (part 1), as well as two pairs of skeleton oil seals (part 13) inside the shaft, which can effectively prevent impurities from entering the transmission system.

[0011] Figure 3 As shown, the hydraulic motor is encapsulated in a motor shield (part 7), the motor shield is fixed to the pump housing by screws (part 8), and the pump housing and the motor shield are isolated from the outside world by a sealing ring (part 10). DETAILED DESCRIPTION

[0012] The present invention needs to be used in conjunction with a mobile hydraulic power station, is suitable for a flow control valve, and can be used normally after being equipped with a suitable hydraulic pipeline connection.

[0013] The present invention can be used in series as a pipeline pump in a pipeline to increase the lift.

[0014] The present invention is suitable for conveying various types of fluid media that are generally viscous, such as fresh water, river water, sea water, crude oil, dirty oil, various chemicals, etc. By selecting appropriate sealing materials, it can be used in the case of corrosive chemicals such as acids and alkalis.

Claims

1. The helical rotor pump is designed based on the unique curved surface coupling structure of the helical rotor and the multi-arm wheel. It is a transmission pump that can transmit fluid media with a wide viscosity range. Its features include a helical rotor, a multi-arm wheel, a hydraulic motor, inlet heating / lubrication, an inlet flange, an outlet flange / quick connector, a hydraulic motor, etc. The hydraulic motor drives the helical rotor to rotate through the connecting shaft. The helical rotor drives the arms of the multi-arm wheel to enter the helical rotor one by one through the curved surface coupling, and then pushes them out one by one. The coupling of the multi-arm wheel and the helical rotor is a dynamic gap sealing structure. The friction sleeve filled between the helical rotor and the pump housing is also a gap sealing structure. The medium seal and lubricating oil seal of the helical rotor pump both adopt a multi-stage sealing method to avoid mutual contamination between the medium and the lubrication system. The main shaft structure of the helical rotor pump adds an axial force balancing bearing, the pump housing adopts a split manufacturing method, and the hydraulic motor is packaged according to the implementation situation, which can meet the use in complex situations. The medium inlet and outlet of the helical rotor pump can be arranged with water injection flanges to provide boundary lubrication for the transportation of viscous media. The helical rotor pump can be equipped with a fast-moving caster trolley.

2. According to claim 1, the unique dynamic sealing structure feature formed by the coupling of the helical rotor and the multi-arm wheel disc (see FIG2 ) is that the outer envelope surface of the helical rotor always maintains line contact with the center line of the outer envelope surface of the multi-arm wheel disc. The curved surface of the helical rotor always maintains surface coupling with the side curved surface of the multi-arm wheel disc support arm.

3. According to claim 1, a friction bushing is filled between the spiral rotor and the pump housing, and the spiral rotor and the friction bushing constitute a gap sealing combination.

4. According to claim 1, the medium seal and lubricating oil seal of the helical rotor pump are isolated from pollution by using a combination of multiple skeleton seals and water seals.

5. According to claim 1, the pump housing of the helical rotor pump is manufactured in a split type and connected by bolts with precision matching, thereby improving maintainability.

6. According to claim 1, the helical rotor pump encapsulates the hydraulic motor in a motor shield, the motor shield is fixed to the pump housing by screws, and the pump housing and the motor shield are isolated from the outside by a sealing ring.

7. According to claim 1, a water injection port can be installed at the medium inlet or outlet of the helical rotor pump to provide boundary lubrication for the transportation of viscous media.

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