Leakage-free positive displacement sliding vane pump

Abstract

The utility model discloses a leakage-free positive displacement sliding vane pump, which relates to the technical field of positive displacement sliding vane pumps and comprises a sliding vane pump and a magnetic transmission component, the sliding vane pump consists of a pump body, an eccentric stator, a rotor and a rotor shaft, and the magnetic transmission component is used for realizing transmission connection between the rotor shaft and a motor; the magnetic transmission assembly comprises a connector, an outer magnetic steel sleeve, an isolation sleeve and an inner magnetic steel disc; when the motor drives the outer magnetic steel sleeve to rotate, the inner magnetic steel disc can rotate through a magnetic field between the outer magnetic steel sleeve and the inner magnetic steel disc. By arranging the magnetic transmission assembly, the motor and the sliding vane pump are combined into a sealed whole, so that the sliding vane pump has the unique advantage of no leakage, and solves the problem of cavitation when a shield pump and a magnetic pump (centrifugal pump) convey volatile liquid and the problem of mechanical seal leakage of a volume sliding vane pump in the prior art; and the phenomena of machine seal burning and motor burning in no-load operation are completely eradicated.

Description

Technical Field

[0001] The utility model relates to the technical field of positive displacement vane pumps, in particular to a leakage-free positive displacement vane pump. Background Art

[0002] Vane pumps are also called blade pumps, scraper pumps, and scraper pumps. Most of them are composed of a pump body, an inner rotor, a stator, a pump cover, and vanes. Its working principle is to rely on centrifugal force to make the vanes close to the eccentric stator, and the volume between the two vanes at the inlet increases to achieve liquid suction, and the volume between the two vanes at the outlet decreases to achieve liquid discharge. It mainly transports flammable, explosive, toxic and volatile liquids similar to liquid ammonia, liquefied petroleum gas, methyl chloride, dimethyl ether, isobutylene, propylene, propane, arsenic, dimethylamine, etc. It is widely used in ammonia production, gas, oil, chemical industry, pharmaceuticals, new materials and other fields.

[0003] The existing positive displacement vane pump has two sets of mechanical seals and a common coupling transmission mode, which has the following problems: 1. The coupling transmission has a large noise and the elastic block is easily damaged;

[0004] 2. Mechanical seals are prone to leakage, posing a potential safety hazard to life and the environment;

[0005] Based on the above problems, a leakage-free magnetic positive displacement vane pump is provided. Utility Model Content

[0006] The purpose of the utility model is to provide a leakage-free positive displacement vane pump in order to solve the above-mentioned background problems.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a non-leakage positive displacement vane pump, comprising a vane pump consisting of a pump body, an eccentric stator, a rotor, and a rotor shaft, wherein the eccentric stator is fixedly installed in the inner cavity of the pump body, the rotor is distributed in the inner cavity of the eccentric stator, the rotor shaft is fixedly installed in the middle of the rotor, and a magnetic transmission component is provided at the transmission end of the pump body, and the magnetic transmission component is used to realize the transmission connection between the rotor shaft and the motor;

[0008] The magnetic transmission assembly includes a coupling body, an outer magnetic steel sleeve, an isolation sleeve, and an inner magnetic steel disk;

[0009] The outer magnetic steel sleeve is rotatably mounted on the inner side of the coupling body and passes through one end of the outer side of the coupling body, and the isolation sleeve is fixedly mounted on the inner side of one end of the coupling body away from the outer magnetic steel sleeve;

[0010] One end of the rotor shaft extends through the outer end of the pump body, and the inner magnetic steel disk is fixed to the end of the rotor shaft located outside the pump body;

[0011] The coupling body is fixed to the outer end of the pump body by bolts, and the isolation sleeve is sleeved on the outer side of the inner magnetic steel disk, and the outer magnetic steel sleeve is sleeved on the outer side of the isolation sleeve. A motor is installed at one end of the coupling body away from the pump body, and the output end of the motor is fixedly connected to the outer magnetic steel sleeve;

[0012] When the motor drives the outer magnetic steel sleeve to rotate, the inner magnetic steel disk can rotate through the magnetic field between the outer magnetic steel sleeve and the inner magnetic steel disk.

[0013] As a further solution of the utility model: a sliding vane is arranged on the inner side of the rotor, and a plurality of the sliding vanes are arranged. The plurality of sliding vanes are circumferentially distributed on the inner side of the rotor and protrude to the inner side of the eccentric stator. Baffles are installed at both ends of the eccentric stator. The eccentric stator, the rotor, the baffles and the sliding vanes form a plurality of sealed cavities.

[0014] As a further solution of the utility model: the vane pump further includes a liquid inlet port, a liquid suction port, a liquid outlet port, and a liquid discharge port;

[0015] The liquid inlet port and the liquid outlet port are respectively fixed to one side and the top of the pump body and are in communication with the inner cavity of the pump body;

[0016] The liquid suction port and the liquid discharge port are respectively arranged on both sides of the eccentric stator, and the liquid suction port and the liquid discharge port are respectively communicated with the inner cavity of the liquid inlet port and the liquid outlet port.

[0017] As a further solution of the utility model: a safety valve and an exhaust valve are installed on the outer side of the conducting portion between the pump body and the inner cavity of the liquid outlet port.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] By setting up a magnetic transmission component, the motor and the vane pump are combined into a sealed whole, which has the unique advantage of no leakage. It especially solves the cavitation problem of the previous shielded pump and magnetic pump (centrifugal pump) when conveying volatile liquids and the mechanical seal leakage problem of the positive displacement vane pump, and completely eliminates the phenomenon of burning the mechanical seal and burning the motor during no-load operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the magnetic transmission component of the utility model;

[0021] Figure 2 It is a schematic diagram of the internal structure of the vane pump of the utility model.

[0022] In the figure: 1. vane pump; 101. pump body; 102. eccentric stator; 103. rotor; 104. rotor shaft; 105. vane; 106. baffle; 107. liquid inlet port; 108. liquid suction port; 109. liquid outlet port; 110. liquid discharge port; 111. safety valve; 112. exhaust valve; 2. magnetic transmission assembly; 201. coupling body; 202. outer magnetic steel sleeve; 203. isolation sleeve; 204. inner magnetic steel disk; 3. motor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1-2 In the embodiment of the utility model, the non-leakage positive displacement vane pump comprises a vane pump 1 composed of a pump body 101, an eccentric stator 102, a rotor 103, and a rotor shaft 104. The eccentric stator 102 is fixedly installed in the inner cavity of the pump body 101, the rotor 103 is distributed in the inner cavity of the eccentric stator 102, the rotor shaft 104 is fixedly installed in the middle of the rotor 103, and the transmission end of the pump body 101 is provided with a magnetic transmission component 2, which is used to realize the transmission connection between the rotor shaft 104 and the motor 3;

[0025] The magnetic transmission assembly 2 includes a coupling body 201, an outer magnetic steel sleeve 202, an isolation sleeve 203, and an inner magnetic steel disk 204;

[0026] The outer magnetic steel sleeve 202 is rotatably mounted on the inner side of the coupling body 201 and passes through one end of the outer side of the coupling body 201. The isolation sleeve 203 is fixedly mounted on the inner side of one end of the coupling body 201 away from the outer magnetic steel sleeve 202.

[0027] One end of the rotor shaft 104 extends through the outer end of the pump body 101, and the inner magnetic steel disk 204 is fixed to the end of the rotor shaft 104 located outside the pump body 101;

[0028] The coupling body 201 is fixed to the outer end of the pump body 101 by bolts, and the isolation sleeve 203 is sleeved on the outer side of the inner magnetic steel disk 204, and the outer magnetic steel sleeve 202 is sleeved on the outer side of the isolation sleeve 203. The motor 3 is installed at the end of the coupling body 201 away from the pump body 101, and the output end of the motor 3 is fixedly connected to the outer magnetic steel sleeve 202;

[0029] When the motor 3 drives the outer magnetic steel sleeve 202 to rotate, the inner magnetic steel disk 204 can rotate through the magnetic field between the outer magnetic steel sleeve 202 and the inner magnetic steel disk 204 .

[0030] In this embodiment: when the vane pump 1 is in operation, the motor 3 drives the outer magnetic steel sleeve 202 to rotate, and the outer magnetic steel sleeve 202 drives the inner magnetic steel disk 204 to rotate under the force of the magnetic field, and the inner magnetic steel disk 204 drives the rotor shaft 104 to rotate, and the rotor shaft 104 drives the rotor 103 to rotate, thereby realizing the operation of the vane pump 1;

[0031] This positive displacement vane pump is a sealed whole composed of a motor and a vane pump 1 through a magnetic transmission, and has the unique advantage of no leakage. It particularly solves the cavitation problem of previous shielded pumps and magnetic pumps (centrifugal pumps) when conveying volatile liquids and the mechanical seal leakage problem of positive displacement vane pumps, and completely eliminates the phenomenon of burning the mechanical seal and burning the motor during no-load operation.

[0032] Please refer to Figures 1-2 A vane 105 is provided on the inner side of the rotor 103, and a plurality of vanes 105 are provided. The plurality of vanes 105 are circumferentially distributed on the inner side of the rotor 103 and protrude to the inner side of the eccentric stator 102. Baffles 106 are installed at both ends of the eccentric stator 102. The eccentric stator 102, the rotor 103, the baffles 106 and the vanes 105 form a plurality of sealed cavities.

[0033] The vane pump 1 further includes a liquid inlet port 107 , a liquid suction port 108 , a liquid outlet port 109 , and a liquid discharge port 110 ;

[0034] The liquid inlet port 107 and the liquid outlet port 110 are respectively fixed to one side and the top of the pump body 101 and are in communication with the inner cavity of the pump body 101;

[0035] The liquid suction port 108 and the liquid discharge port 110 are respectively provided on both sides of the eccentric stator 102, and the liquid suction port 108 and the liquid discharge port 110 are respectively communicated with the inner cavity of the liquid inlet port 107 and the liquid outlet port 109;

[0036] A safety valve 111 and an exhaust valve 112 are installed on the outside of the portion where the pump body 101 communicates with the inner cavity of the liquid outlet port 109 .

[0037] In this embodiment: it should be supplemented that: the inner curved surface of the eccentric stator 102 is made of a composite curve, and the eccentric stator 102, the rotor 103, the baffle 106 and the vane 105 form a plurality of sealed cavities;

[0038] When the rotor shaft 104 drives the rotor 103 to rotate, the sliding vane 105 slides out and fits tightly with the inner curved surface of the eccentric stator 102, and the volume of the sealed cavity near the liquid suction port 108 gradually increases and forms a negative pressure to generate suction, thereby sucking liquid from the liquid inlet port 107;

[0039] When the rotor 103 rotates a certain angle, the slide 105 retracts and the volume gradually decreases, thereby pressing the liquid out from the liquid discharge port 110 and finally discharged from the liquid outlet port 109;

[0040] It should be noted that the outlet pipeline of the pump body 101 (i.e., the part connected to the inner cavity of the liquid outlet port 109) is provided with a reflux pipeline, and a safety valve 111 is installed on the reflux pipeline to prevent the outlet pipeline from closing and causing a failure. The reflux pipeline is connected to a remote position of the inlet pipeline (i.e., the part connected to the inner cavity of the liquid inlet port 107).

[0041] In addition, the exhaust valve 112 is used to exhaust the pump body before operation. The pump is started after the pump chamber inside the pump body 101 is completely filled with working fluid. At the same time, when the equipment is disassembled and repaired, the remaining air in the pump chamber is completely exhausted through the exhaust valve 112.

[0042] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A non-leakage positive displacement vane pump, comprising a vane pump (1) consisting of a pump body (101), an eccentric stator (102), a rotor (103), and a rotor shaft (104), wherein the eccentric stator (102) is fixedly mounted in the inner cavity of the pump body (101), the rotor (103) is distributed in the inner cavity of the eccentric stator (102), and the rotor shaft (104) is fixedly mounted in the middle of the rotor (103), characterized in that: The transmission end of the pump body (101) is provided with a magnetic transmission component (2), and the magnetic transmission component (2) is used to realize the transmission connection between the rotor shaft (104) and the motor (3); The magnetic transmission component (2) comprises a coupling body (201), an outer magnetic steel sleeve (202), an isolation sleeve (203), and an inner magnetic steel disk (204); The outer magnetic steel sleeve (202) is rotatably mounted on the inner side of the coupling body (201) and passes through one end of the outer side of the coupling body (201); the isolation sleeve (203) is fixedly mounted on the inner side of one end of the coupling body (201) away from the outer magnetic steel sleeve (202); One end of the rotor shaft (104) extends through the outer end of the pump body (101), and the inner magnetic steel disk (204) is fixed to one end of the rotor shaft (104) located outside the pump body (101); The coupling body (201) is fixed to the outer end of the pump body (101) by means of bolts, and the isolation sleeve (203) is sleeved on the outer side of the inner magnetic steel disk (204), and the outer magnetic steel sleeve (202) is sleeved on the outer side of the isolation sleeve (203). A motor (3) is installed at one end of the coupling body (201) away from the pump body (101), and the output end of the motor (3) is fixedly connected to the outer magnetic steel sleeve (202); When the motor (3) drives the outer magnetic steel sleeve (202) to rotate, the inner magnetic steel disk (204) can be rotated through the magnetic field between the outer magnetic steel sleeve (202) and the inner magnetic steel disk (204).

2. The non-leakage positive displacement vane pump according to claim 1, characterized in that: A sliding vane (105) is arranged on the inner side of the rotor (103), and a plurality of the sliding vanes (105) are arranged. The plurality of sliding vanes (105) are circumferentially distributed on the inner side of the rotor (103) and protrude to the inner side of the eccentric stator (102). Baffles (106) are installed at both ends of the eccentric stator (102). The eccentric stator (102), the rotor (103), the baffles (106) and the sliding vanes (105) form a plurality of sealed cavities.

3. The leak-free positive displacement vane pump according to claim 1, characterized in that: The vane pump (1) further comprises a liquid inlet port (107), a liquid suction port (108), a liquid outlet port (109), and a liquid discharge port (110); The liquid inlet port (107) and the liquid outlet port (109) are respectively fixed to one side and the top of the pump body (101) and are in communication with the inner cavity of the pump body (101); The liquid suction port (108) and the liquid discharge port (110) are respectively arranged on both sides of the eccentric stator (102), and the liquid suction port (108) and the liquid discharge port (110) are respectively communicated with the inner cavities of the liquid inlet port (107) and the liquid outlet port (109).

4. The non-leakage positive displacement vane pump according to claim 3, characterized in that: A safety valve (111) and an exhaust valve (112) are installed on the outside of the portion where the pump body (101) communicates with the inner cavity of the liquid outlet port (109).

Images