Magnetic rotary vane pump

Abstract

The utility model discloses a magnetic rotary vane pump, and belongs to the technical field of rotary vane pumps. According to the magnetic rotary vane pump, the pump shaft input end is combined with the inner magnetic cylinder, and the isolation sleeve of the inner magnetic cylinder is connected with the pump body in a sealing manner, so that the pump body is absolutely sealed at the pump shaft input end, the problem of medium leakage at the pump shaft input end is avoided, and the safety of the pump body during working is improved; meanwhile, an independent oil chamber is adopted in the pump body to lubricate the mechanical seal of the pump shaft, so that the stability of the mechanical seal under long-time work is guaranteed, the mechanical seal can operate for a long time under the medium gasification environment, the service life of the mechanical seal is prolonged, and the risk of medium leakage is further reduced; the rotary vane pump is scientific and reasonable in design, simple and novel in structure, convenient to machine, low in manufacturing cost and high in practicability.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rotary vane pump technical field, specifically a magnetic rotary vane pump. BACKGROUND

[0002] Rotary vane pump is also called rotary vane vacuum pump, which is composed of stator, rotor and rotary vane, and is used to transport gas by the contact between rotary vane and inner wall of stator through the principle of eccentricity and centrifugal force.

[0003] The existing liquefied petroleum gas pump is a rotary vane pump, and the applicant has previously applied for a Chinese utility model patent with the patent name of a shielded liquefied petroleum gas pump and the application number of 202221845785.9, which fully illustrates the safety hazards existing in the existing liquefied petroleum gas pump. That is, mechanical seal is used between the pump body and the pump shaft, and once the mechanical seal is damaged after long-term operation, the transported liquid and gas are likely to leak from the belt pulley end. Since the medium transported by the liquefied petroleum gas pump is mostly flammable and explosive, once leaked, it will cause explosion and fire and other major safety accidents.

[0004] When transporting liquid, the existing rotary vane pump lubricates the internal mechanical seal through the medium, and if the internal temperature rises due to long-time work, the medium will gasify, causing dry grinding of the mechanical seal and damage, thus causing leakage.

[0005] Therefore, the existing rotary vane pump is improved. First, the internal chamber structure of the traditional rotary vane pump is changed, and an oil chamber for lubricating the mechanical seal is separately added on both sides of the working chamber, which can realize separate lubrication of the mechanical seal and improve the service life of the mechanical seal. Second, the internal magnetic rotor of the inner magnetic cylinder is connected with the input end of the pump shaft of the rotary vane pump by using the completely sealed property of the existing magnetic pump body, and the isolation sleeve of the inner magnetic cylinder is sealingly connected with the rotary vane pump, thus realizing the overall sealing of the rotary vane pump. Only the corresponding outer magnetic cylinder needs to be assembled outside the inner magnetic cylinder to drive the outer magnetic cylinder to rotate, so that the rotary vane pump can work. Even if the mechanical seal inside the rotary vane pump is damaged, the transported medium will only leak into the inner magnetic cylinder, avoiding the problem of medium leakage into the surrounding environment, improving the safety of the rotary vane pump during work, and having strong practicality. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a magnetic rotary vane pump to solve the problems in the above background technology.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] The utility model provides a magnetic rotary vane pump, including the pump body, the pump shaft is rotationally arranged in the pump body, the working chamber is arranged in the pump body, the rotor is arranged in the working chamber and is connected with the pump shaft, the stator is arranged outside the rotor, the oil chamber is arranged on both sides of the working chamber, the pump shaft is rotationally arranged in the oil chamber, the mechanical seal is arranged in the oil chamber and is sleeved on the pump shaft, is used for realizing the sealed isolation of working chamber and oil chamber, and the pump shaft input end penetrates one side oil chamber and is connected with the inner magnetic rotor, the isolation sleeve is sleeved on the outer side of the inner magnetic rotor and is sealedly connected with the outer wall of the pump body.

[0009] As a further preferred embodiment of the utility model: the pump body is provided with two side partitions for separating the working chamber and the oil chamber, and the pump shaft is rotationally connected with the side partitions.

[0010] As a further preferred embodiment of the utility model: the mechanical seal comprises a single-end mechanical seal and a double-end mechanical seal, the single-end mechanical seal is located in the oil chamber away from the input end of the pump shaft, and the sealing end thereof is connected with the side partition, and the double-end mechanical seal is located in the oil chamber close to the input end of the pump shaft, and the sealing ends on both sides thereof are connected with the side partition and the inner wall of the pump body respectively.

[0011] As a further preferred embodiment of the utility model: the side of the pump shaft away from the input end is rotationally connected with the inner wall of the oil chamber through an inner bearing, and the side of the pump shaft close to the input end is rotationally connected with the outer wall of the pump body through an outer bearing.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The magnetic rotary vane pump combines the input end of the pump shaft with the inner magnetic cylinder, seals the isolation sleeve of the inner magnetic cylinder with the pump body, forms absolute sealing at the input end of the pump shaft, avoids medium leakage at the input end of the pump shaft, improves the safety of the pump body during operation, lubricates the mechanical seal of the pump shaft with a separate oil chamber in the pump body, ensures the stability of the mechanical seal during long-time operation, enables long-time operation in the environment where the medium is gasified, prolongs the service life of the mechanical seal, and further reduces the risk of medium leakage. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a sectional structure schematic view of the utility model magnetic rotary vane pump;

[0015] Figure 2 It is a schematic diagram of the actual application state of the utility model magnetic rotary vane pump.

[0016] In the figure: 1, pump body; 2, pump shaft; 3, working cavity; 4, rotor; 5, stator; 6, pump outlet; 7, oil chamber; 8, inner magnetic rotor; 9, spacer sleeve; 10, outer magnetic cylinder; 11, side partition plate; 12, inner bearing; 13, single-end mechanical seal; 14, double-end mechanical seal; 15, outer bearing; 16, shaft sleeve; 17, driving shaft; 18, coupling; 19, motor. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. Embodiment 1

[0018] Please refer to Figure 1 The embodiment provides a magnetic rotary vane pump, comprising a pump body 1, a pump shaft 2 is rotatably arranged in the pump body 1, a working cavity 3 is further arranged in the pump body 1, a rotor 4 connected with the pump shaft 2 is arranged in the working cavity 3, and a stator 5 is arranged on the outer side of the rotor 4, wherein, as a conventional design, the rotor 4 is eccentrically arranged, and a rotary vane is arranged in the rotor 4, and the above structure is a conventional structure of a rotary vane pump familiar to those skilled in the art, and the application will not be described here.

[0019] In the application, oil chambers 7 are arranged on both sides of the working cavity 3, specifically, two side partition plates 11 are arranged in the pump body 1 for separating the working cavity 3 and the oil chambers 7. As common sense, the pump shaft 2 should be rotatably connected with the side partition plate 11, so that the pump shaft 2 is rotatably arranged in the oil chamber 7. Specifically, a mechanical seal is arranged in the oil chamber 7 and sleeved on the pump shaft 2, for realizing the sealing isolation between the working cavity 3 and the oil chamber 7. Specifically, the mechanical seal comprises a single-end mechanical seal 13 and a double-end mechanical seal 14, the single-end mechanical seal 13 is located in the oil chamber 7 away from the input end of the pump shaft 2, and the sealing end is connected with the side partition plate 11, for realizing the sealing isolation between the working cavity 3 and the oil chamber 7 away from the input end of the pump shaft 2; the double-end mechanical seal 14 is located in the oil chamber 7 close to the input end of the pump shaft 2, and the sealing ends on both sides are respectively connected with the side partition plate 11 and the inner wall of the pump body 1, for realizing the sealing isolation between the working cavity 3 and the corresponding oil chamber 7, and the sealing isolation between the oil chamber 7 and the outside of the pump body 1, so as to realize the double sealing guarantee for the medium conveyed in the working cavity 3.

[0020] It should be noted that as a conventional design, the pump shaft 2 is mounted in the pump body 1 through bearings, specifically, the side of the pump shaft 2 away from the input end is rotatably connected to the inner wall of the oil chamber 7 through an inner bearing 12, and the side of the pump shaft 2 close to the input end is rotatably connected to the outer wall of the pump body 1 through an outer bearing 15, which is a mounting knowledge familiar to those skilled in the art and will not be described here.

[0021] At the same time, in order to realize the sealing of the input end of the pump shaft 2, the input end of the pump shaft 2 penetrates one side of the oil chamber 7 and is connected with an inner magnetic rotor 8, and the outer side of the inner magnetic rotor 8 is sleeved with a separation sleeve 9 which is sealingly connected with the outer wall of the pump body 1. It should be noted that the inner magnetic rotor 8 and the separation sleeve 9 are conventional structures of existing magnetic pumps, which can be purchased, and their structures and connection relationship will not be limited here. The sealing connection between the separation sleeve 9 and the pump body 1 is also a conventional static sealing connection familiar to those skilled in the art, which will not be limited here.

[0022] At the same time, it should be noted that as a conventional knowledge, the pump body 1 of the vane pump should have a medium inlet and outlet communicating with the working chamber 3, and the medium outlet is the pump outlet 6 shown in Figure 1 Figure 1 is a sectional view, the medium inlet is not shown, and its structure and mounting position are conventional designs familiar to those skilled in the art and will not be described here.

[0023] At the same time, it should be noted that as a conventional knowledge, the pump body 1 should be provided with an oil injection hole communicating with the oil chamber 7 for injecting lubricating oil, and a visible oil window should be provided outside the pump body 1 for observing the liquid level of the lubricating oil in the oil chamber 7. Both are conventional operations familiar to those skilled in the art, and will not be described here.

[0024] In actual application, the driving mode of the vane pump is the same as that of the magnetic cylinder, that is, by sleeving a corresponding outer magnetic cylinder 10 outside the separation sleeve 9, driving the outer magnetic cylinder 10 to rotate, the inner magnetic rotor 8 and the pump shaft 2 can be driven to rotate; the working principle of conveying medium is the same as that of the existing vane pump, which will not be described here. The driving mode of the outer magnetic cylinder 10 is also a conventional design, which can be referred to Figure 2 by the cooperation of the shaft coupling 18 and the motor 19 (the shaft coupling 18 and the motor 19 can be selected according to the adaptation requirements), a driving shaft 17 is provided on the outer magnetic cylinder 10, the driving shaft 17 is connected with the output end of the motor 19 through the shaft coupling 18, the outer magnetic cylinder 10 can be driven to rotate by the motor 19, and in order to ensure the stability of the rotation of the driving shaft 17, a shaft sleeve 16 is also sleeved outside the driving shaft 17, the driving shaft 17 is rotatably connected with the shaft sleeve 16, and one side of the shaft sleeve 16 is fixed on the pump body 1. The above-mentioned driving mode of the outer magnetic cylinder 10 is one of the conventional driving modes familiar to those skilled in the art, and will not be described here.

[0025] ​In practical application, when the sealing end of the mechanical seal on the two side partitions 11 is damaged, the medium only leaks into the oil chamber 7; when both sealing ends of the double-end mechanical seal 14 are damaged, the conveying medium leaks into the oil chamber 7 and the isolation sleeve 9, and does not leak into the surrounding environment, effectively realizing the sealing of the rotary vane pump and avoiding the problem of medium leakage into the environment.

[0026] It should be noted that the above embodiments are only for specific and clear description of the technical solutions and technical features of the present application. For those skilled in the art, the solutions or features that belong to the prior art or common knowledge are not described in detail in the above embodiments.

[0027] In addition, the technical solutions of the present application are not limited to the above embodiments, and those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation manners that those skilled in the art can understand.

Claims

1. A magnetic rotary vane pump, comprising a pump body (1), a pump shaft (2) rotatably disposed within the pump body (1), a working chamber (3) disposed within the pump body (1), a rotor (4) connected to the pump shaft (2) disposed within the working chamber (3), and a stator (5) disposed outside the rotor (4), characterized in that, Oil chambers (7) are provided on both sides of the working chamber (3). The pump shaft (2) is rotatably installed in the oil chamber (7). A mechanical seal is provided in the oil chamber (7) and sleeved on the pump shaft (2) to achieve sealing isolation between the working chamber (3) and the oil chamber (7). The input end of the pump shaft (2) passes through one side of the oil chamber (7) and is connected to an inner magnetic rotor (8). An isolation sleeve (9) is sleeved on the outside of the inner magnetic rotor (8) and sealed to the outer wall of the pump body (1).

2. The magnetic rotary vane pump according to claim 1, characterized in that, The pump body (1) is provided with two side partitions (11) to separate the working chamber (3) and the oil chamber (7). The pump shaft (2) is rotatably connected to the side partitions (11).

3. The magnetic rotary vane pump according to claim 2, characterized in that, The mechanical seal includes a single-end mechanical seal (13) and a double-end mechanical seal (14). The single-end mechanical seal (13) is located in the oil chamber (7) on the side away from the input end of the pump shaft (2), and the sealing end is connected to the side partition (11). The double-end mechanical seal (14) is located in the oil chamber (7) on the side close to the input end of the pump shaft (2), and the sealing ends on both sides are connected to the side partition (11) and the inner wall of the pump body (1), respectively.

4. The magnetic rotary vane pump according to claim 1, characterized in that, The side of the pump shaft (2) away from the input end is rotatably connected to the inner wall of the oil chamber (7) through an inner bearing (12), and the side of the pump shaft (2) near the input end is rotatably connected to the outer wall of the pump body (1) through an outer bearing (15).

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