Internal air cooling plunger pump direct-driven permanent magnet motor with vibration reduction stabilizing structure

Abstract

The invention relates to the technical field of direct-driven permanent magnet motors, and discloses an internal air-cooled plunger pump direct-driven permanent magnet motor with a vibration-reducing stabilizing structure, which is characterized in that an annular air bin is formed aiming at the arrangement position of a stator in an air-cooled heat dissipation mode, and cold air is driven by high-speed airflow to continuously flow so as to take away high heat in a machine body to achieve the heat dissipation purpose. Furthermore, a central fin and a U-shaped fin are additionally arranged in the flowing process of high-speed flow, the central fin and the U-shaped fin are essentially used for changing the flowing mode of high-speed airflow so as to achieve the purpose of reducing the kinetic energy of the high-speed airflow, excessive extra noise generated by friction between the airflow and air is avoided, and the structural characteristics of the central fin and the U-shaped fin and the movement mode of the central fin are preferentially limited; the air blocking assembly is additionally arranged, the essence of the air blocking assembly is that the air blocking assembly is matched with the rotating process of the rotor to limit the secondary flowing process of the airflow, on one hand, the airflow pressure environment in the machine body is further reduced, and on the other hand, dynamic stability in the rotor moving process is maintained.

Description

Technical Field

[0001] The invention relates to the technical field of direct-drive permanent magnet motors, and in particular to an internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure. Background Art

[0002] For the driving motor used in the plunger pump, because its temperature change is one of the key factors affecting the operating efficiency, a heat dissipation structure is mostly added. For details, please refer to the relevant content in publication numbers CN103580422A and CN103580421A. Specific heat dissipation methods include air cooling and liquid cooling.

[0003] However, combined with the air cooling method used in the permanent magnet motor used in the plunger pump for oil field, the permanent magnet motor itself has relatively large operating noise, and the essence of the air cooling method is to use high-speed airflow to take away the heat in the body, but the friction between the airflow and the air aggravates the noise generation. In addition, the high-speed airflow will also drive the air pressure environment inside the body, which may cause a greater workload on the key transmission structure and further affect the stability of the transmission process.

[0004] This application proposes a solution to this problem. Summary of the invention

[0005] The purpose of the present invention is to provide an internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure. Regarding the heat dissipation process in the permanent magnet motor used in the plunger pump, air cooling is mainly used, because the operating noise of the permanent magnet motor is relatively large, and the friction between the high-speed airflow and the air during air cooling aggravates the noise generation. In addition, the high-speed airflow will also indirectly affect the operating stability of the key structures inside the body.

[0006] The object of the present invention can be achieved by the following technical scheme: an internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure comprises a body and a rotor and a stator arranged inside the body, an airway component is arranged between the stator and the inner wall of the body, and an air blocking component is arranged at one end of the body corresponding to the rotor; An air duct for connecting an air pump assembly is installed on the outer wall of the body. The body forms an annular wind bin through the air duct assembly. The air duct assembly includes an air hood pipe, a dynamic ring sheet, a central fin and a U-shaped fin. The air hood pipe is provided with air leakage ports at both ends corresponding to the length direction of the rotor.

[0007] It is further configured as follows: the dynamic ring piece is located in the middle section of the wind hood pipe, and the setting position of the dynamic ring piece corresponds to the wind pipe.

[0008] It is further configured as follows: the inner wall of the wind hood tube is in contact with the outer wall of the stator, and a mounting half ring is provided between the stator and the inner wall of the machine body.

[0009] It is further configured as follows: the central fin is mounted on the dynamic ring plate, the U-shaped fin is mounted on the wind hood tube, and the central fin and the U-shaped fin are arranged in a circular array along the center point of the wind hood tube.

[0010] It is further configured that: the dynamic ring piece and the wind hood pipe are rotationally connected.

[0011] It is further configured that: the central fin is inclined in the direction pointing to the U-shaped fin, and the inclination direction of the central fin matches the rotation direction of the dynamic ring sheet.

[0012] It is further configured as follows: the U-shaped fins in each adjacent position are staggered along their opening direction, and a U-shaped three-bend air duct is formed between the U-shaped fins in each adjacent position, and the air leakage port is located at a bend in the U-shaped three-bend air duct.

[0013] It is further configured as follows: the air-blocking assembly includes a fixed ring, a mounting block and a plurality of cooperating fins, the fixed ring is rotatably mounted in the inner wall of the body, the mounting block is mounted on the rotating shaft of the rotor, and a directional connecting rod is installed between the outer wall of the mounting block and the inner wall of the fixed ring, and the cooperating fin and the directional connecting rod are rotatably connected.

[0014] It is further configured as follows: the directional connecting rods are arranged in a ring array along the center point position of the mounting block, and a connecting spring is installed at one end position of the directional connecting rod corresponding to the fixing ring.

[0015] The present invention has the following beneficial effects: The air cooling method of permanent magnet motors in oilfield mining operations is optimized and improved. First, an annular wind bin is formed between the position of the stator relative to the inner wall of the machine body through the wind hood tube, and the cold air flow continuously pumped by the air pump assembly is injected into the machine body, and the heat inside the machine body is taken away through the heat exchange principle. The difference is that: a central fin and a U-shaped fin are added to the inside of the annular wind bin, mainly to exchange heat between the high-speed cold air and the inside of the machine body. For this, it is also necessary to add and optimize the structural characteristics of the central fin and the U-shaped fin. First, the central fin and the dynamic ring are dynamically rotated by the high-speed airflow, thereby preliminarily reducing the kinetic energy of the high-speed airflow. Secondly, the structural characteristics of the U-shaped fin are optimized, the purpose of which is to "absorb" the kinetic energy in the high-speed airflow to avoid excessive noise caused by the friction between the high-speed airflow and the air; Based on the above content, when limiting the structural characteristics of the center fin and the U-shaped fin and the movement mode of the center fin, it is also necessary to add an air leakage port according to the U-shaped three-bend air duct to ensure that the cold air flow after "speed reduction" enters the body for sufficient heat exchange. To this end, an air blocking component is further added. The air blocking component mainly cooperates with the rotation of the rotor and the flow mode of the cold air flow. On the one hand, it further reduces the air flow pressure environment inside the body, and on the other hand, it maintains the dynamic stability during the rotor movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the direct-driven permanent magnet motor with an internal air-cooled plunger pump and a vibration-reducing and stabilizing structure proposed by the present invention; Figure 2 A cross-sectional view of the body of the direct-driven permanent magnet motor with an internal air-cooled plunger pump and a vibration-reducing and stabilizing structure proposed by the present invention; Figure 3 The invention proposes an internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure. Figure 1 Corresponding longitudinal section view of the air duct; Figure 4 The invention proposes an internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure. Figure 2 Split diagram of ; Figure 5 This is a disassembled diagram of the airway component in the direct-driven permanent magnet motor of the internal air-cooled plunger pump with a vibration reduction and stabilization structure proposed by the present invention; Figure 6 It is an axial front view of the air duct corresponding to the airway component in the direct-driven permanent magnet motor of the internal air-cooled plunger pump with a vibration reduction and stabilization structure proposed by the present invention; Figure 7 This is a disassembled diagram of the air blocking component in the direct-driven permanent magnet motor of the internal air-cooled plunger pump with a vibration reduction and stabilization structure proposed by the present invention.

[0018] In the figure: 1, machine body; 101, annular wind bin; 2, air duct; 3, fixed ring; 4, wind hood tube; 401, central fin; 402, U-shaped fin; 403, air leakage port; 404, dynamic ring piece; 5, mounting half ring; 6, mounting block; 7, directional connecting rod; 8, connecting spring; 9, cooperating fin. DETAILED DESCRIPTION

[0019] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1: For the heat dissipation process in the permanent magnet motor used in the plunger pump, air cooling is mainly used. Because the permanent magnet motor has relatively large operating noise, and the friction between the high-speed airflow and the air in the air cooling aggravates the noise generation, and the high-speed airflow will indirectly affect the operating stability of the key structure inside the body, the following technical solution is proposed: Reference Figures 1 to 7 The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure in this embodiment includes a body 1 and a rotor and a stator arranged inside the body 1, an airway component is arranged between the stator and the inner wall of the body 1, and an air blocking component is arranged at one end of the body 1 corresponding to the rotor; An air duct 2 for connecting the air pump assembly is installed on the outer wall of the body 1. The body 1 forms an annular wind bin 101 through the air duct assembly. The air duct assembly includes an air hood tube 4, a dynamic ring sheet 404, a central fin 401 and a U-shaped fin 402. The air hood tube 4 is provided with air leakage ports 403 at both ends corresponding to the length direction of the rotor.

[0021] Basic principle: The direct-drive permanent magnet motor used in the plunger pump used in oil field exploitation is explained. Because of its continuous motion, it is necessary to optimize the heat dissipation inside it. The conventional air cooling heat dissipation method is the most direct and effective. For this, the present invention is also based on air cooling heat dissipation. Its essence is to continuously pump cold air into the body 1 through the air duct 2 by the air pump component, so that the cold air flow and the high-temperature environment inside the body 1 are continuously exchanged. Figure 4 Provide explanation; The cold air flow pumped by the air pump assembly is mainly located in the wind hood pipe 4, and the wind hood pipe 4 is installed at the external position of the stator. Because the key heat source of the integral permanent magnet motor is the stator structure, it is also necessary to briefly explain that the material of the wind hood pipe 4 is limited to a high thermal conductivity material, so that the cold air flow can be used for rapid heat exchange with the stator; Finally, the airflow after heat exchange will leak out from the annular wind bin 101 through the air leakage port 403, and because an air grid is provided at one end of the overall body 1, the airflow after heat exchange is discharged from the air grid. It should also be noted that: the present invention is significantly different from the conventional air-cooling heat dissipation method in that it does not use high-speed airflow to blow out the high-temperature gas inside the body 1, but rather achieves the purpose of cooling the body 1 after sufficient heat exchange. This purpose is to avoid sufficient friction between the high-speed gas and the air during flow and generate a large friction noise.

[0022] Embodiment 2: Based on the technical solution in Embodiment 1, the overall airway assembly is described: The dynamic ring piece 404 is located in the middle section of the wind hood tube 4, and the setting position of the dynamic ring piece 404 corresponds to the wind duct 2. The inner wall of the wind hood tube 4 is in contact with the outer wall of the stator. A mounting half ring 5 is provided between the stator and the inner wall of the body 1. The central fin 401 is installed on the dynamic ring piece 404, and the U-shaped fin 402 is installed on the wind hood tube 4. The central fin 401 and the U-shaped fin 402 are arranged in a circular array along the center point of the wind hood tube 4. The dynamic ring piece 404 is rotationally connected to the wind hood tube 4, the central fin 401 is inclined in the direction pointing to the U-shaped fin 402, and the inclination direction of the central fin 401 matches the rotation direction of the dynamic ring piece 404, the U-shaped fins 402 in each adjacent position are staggered along their opening direction, and a U-shaped three-bend air duct is formed between the U-shaped fins 402 in each adjacent position, and the air leakage port 403 is located at a bend in the U-shaped three-bend air duct.

[0023] Solution Description: Combined with Figure 5 and Figure 6 To illustrate, the key content of the present invention lies in the structure of the wind shield pipe 4, and refer to Figure 3 , the hood tube 4 is located between the inner wall of the machine body 1 and the outer wall of the stator, and the stator is mainly installed in the position of the inner wall of the machine body 1 by rotating the mounting half ring 5, while the hood tube 4 is directly fixed in the inner wall of the machine body 1, so that the cold air flow pumped into the air duct 2 mainly remains in the annular wind bin 101 formed by the hood tube 4, but the specific flow process of the cold air flow is optimized and improved as follows: S1: Because the cold air flow pumped out by the air pump assembly has high kinetic energy, if only the air hood tube 4 is set inside the machine body 1, the kinetic energy of the high-speed cold air flow will cause friction with the annular air bin 101 and the air environment inside the machine body 1, thereby generating large friction noise. In this regard, the central fin 401 and the U-shaped fin 402 are obtained after the improvement of the air hood tube 4. The key purpose of the central fin 401 and the U-shaped fin 402 is to change the flow mode of the cold air flow and "consume" the kinetic energy of the air flow, and then reduce the noise generated by friction; S2: In combination with S1, there is a difference in the installation method of the central fin 401 and the U-shaped fin 402. First, the U-shaped fin 402 is located at both ends of the central fin 401, and the U-shaped fin 402 is directly installed inside the wind shield tube 4, but the central fin 401 is installed in the dynamic ring piece 404, and it is ensured that the dynamic ring piece 404 can rotate freely in the wind shield tube 4; S3: The technical content in S2 is combined again for explanation: the setting position of the dynamic ring piece 404 corresponds to the setting position of the air duct 2, and is combined with Figure 6 To illustrate, when the cold air flow is pumped from the air duct 2 into the annular air chamber 101, the structural characteristics of the central fin 401 are first limited to Figure 6 Based on the V-shaped structure shown in FIG. 4 , when the cold airflow acts on the multiple central fins 401, the dynamic ring piece 404 is driven to rotate in a directional manner based on the kinetic energy of the cold airflow itself. Therefore, it can be understood that the cold airflow only flows in an annular manner in the region of the dynamic ring piece 404. However, during the rotation of the dynamic ring piece 404, the cold airflow is affected by the interference of the central fin 401, and the cold airflow in the annular flow process is "driven" into the U-shaped fin 402, as shown in FIG. Figure 6 As shown, each U-shaped fin 402 has two U-shaped structures, and the adjacent positions are staggered, so each U-shaped fin 402 is combined to form an independent U-shaped three-bend air duct, and the cold air flow will flow in a U-shaped manner in the U-shaped three-bend air duct. The purpose of this is to extend the heat exchange time between the cold air flow and the stator, and the air flow after heat exchange leaks out to the internal position of the body 1 through the air leakage port 403; For this purpose, it is necessary to limit the end of the U-shaped fin 402 away from the central fin 401 to be connected to the wind hood tube 4, so as to ensure that the U-shaped three-bend air duct is connected with the central fin 401 only through the air leakage port 403.

[0024] Embodiment 3: Combining the technical contents in Embodiment 2, a structural description of the gas blocking component is provided: The air-blocking assembly includes a fixed ring 3, a mounting block 6 and a plurality of cooperating fins 9. The fixed ring 3 is rotatably mounted on the inner wall of the body 1. The mounting block 6 is mounted on the rotating shaft of the rotor, and a directional connecting rod 7 is installed between the outer wall of the mounting block 6 and the inner wall of the fixed ring 3. The cooperating fin 9 and the directional connecting rod 7 are rotatably connected. The directional connecting rod 7 is arranged in a circular array along the center point of the mounting block 6, and a connecting spring 8 is installed at one end of the directional connecting rod 7 corresponding to the fixed ring 3.

[0025] Solution Description: Combined with Figure 4For explanation, in the conventional motor structure, an air grid is provided at one end, and the kinetic energy of the gas leaking from the annular air bin 101 is relatively low. For this, an air blocking component is added to the inner position of the other end of the body 1. The essence of the air blocking component is not to hinder the flow process of the airflow, but to cooperate with the rotation process of the rotor to interfere with the flow direction of the airflow. For details, refer to Figure 7 To explain: First, the mounting block 6 is directly fixedly mounted on the rotor shaft, so as to cooperate with the directional connecting rod 7 and the fixing ring 3 for directional rotation, and its rotation process is completely matched with the rotation state of the rotor. In this regard, when considering the relatively stable state of the airflow inside the body 1, each cooperative wing 9 is first driven to deviate in the direction pointing to the fixing ring 3 under the action of centrifugal force, and its deviation stroke is proportional to the centrifugal force. For this, a connecting spring 8 is added to one end of the directional connecting rod 7, and the overall fixing ring 3 and the mounting block 6 cooperate with the directional connecting rod 7 to mainly maintain the stability of the rotor's rotation process. The main purpose of the connecting spring 8 is to reduce the stroke speed of the cooperative wing 9 to achieve the purpose of buffering and absorbing energy. However, in actual circumstances, the airflow in the annular wind bin 101 will continue to flow into the interior of the machine body 1, and the cooperative fins 9 will also undergo directional deflection when cooperating with the rotor rotation, thereby interfering with the airflow direction inside the machine body 1. Because in the initial state, the position of the cooperative fins 9 will not tilt, and when the rotor is in continuous rotation, the cooperative fins 9 will undergo directional rotation, so it can be understood that: in actual circumstances, the airflow leaking from the annular wind bin 101 will interfere with the rotation direction of the cooperative fins 9. To summarize, the rotation process of the cooperative fins 9 will interfere with the airflow direction inside the machine body 1, and conversely, the airflow leaking from the wind hood tube 4 will also interfere with the rotation action of the cooperative fins 9. The cooperative fins 9 serve as a "counterweight" in the rotation process of the rotor, and their rotation action will also serve the purpose of initially maintaining stability during the rotation process of the rotor.

[0026] In summary: air cooling is used to form an annular wind bin according to the setting position of the stator, and high-speed airflow is used to drive the continuous flow of cold air to take away the high heat inside the body to achieve the purpose of heat dissipation, and further center fins and U-shaped fins are added for the flow process of high-speed flow. The essence of the two is to change the flow mode of high-speed airflow to reduce the kinetic energy of high-speed airflow and avoid excessive additional noise caused by friction between airflow and air. For this purpose, the structural characteristics of the two and the movement mode of the center fin are preferentially restricted, and an air-blocking component is further added. The essence of the air-blocking component is to cooperate with the rotor rotation process to limit the secondary flow process of the airflow. On the one hand, it further reduces the airflow pressure environment inside the body, and on the other hand, it maintains the dynamic stability of the rotor during movement.

[0027] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure, comprising a body (1) and a rotor and a stator arranged inside the body (1), characterized in that: An air passage component is provided between the stator and the inner wall of the body (1), and an air blocking component is provided at one end of the body (1) corresponding to the rotor; An air duct (2) for connecting to an air pump assembly is installed on the outer wall of the machine body (1); the machine body (1) forms an annular air bin (101) through the air duct assembly; the air duct assembly comprises an air hood pipe (4), a dynamic ring sheet (404), a central fin (401) and a U-shaped fin (402); and air leakage ports (403) are provided at two end positions of the air hood pipe (4) corresponding to the length direction of the rotor.

2. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 1 is characterized in that: The dynamic ring piece (404) is located in the middle section of the wind shield pipe (4), and the setting position of the dynamic ring piece (404) corresponds to the wind pipe (2).

3. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 1, characterized in that: The inner wall of the wind hood tube (4) is in contact with the outer wall of the stator, and a mounting half ring (5) is provided between the stator and the inner wall of the machine body (1).

4. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 1, characterized in that: The central fin (401) is mounted on the dynamic ring sheet (404), and the U-shaped fin (402) is mounted on the wind hood tube (4), and the central fin (401) and the U-shaped fin (402) are arranged in a ring array along the center point of the wind hood tube (4).

5. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 4 is characterized in that: The dynamic ring piece (404) and the wind shield pipe (4) are rotatably connected.

6. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 4, characterized in that: The central fin (401) is inclined in a direction pointing toward the U-shaped fin (402), and the inclination direction of the central fin (401) matches the rotation direction of the dynamic ring sheet (404).

7. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 4, characterized in that: The U-shaped fins (402) in each adjacent position are arranged in a staggered manner along the opening direction thereof, and a U-shaped three-bend air duct is formed between the U-shaped fins (402) in each adjacent position, and the air leakage port (403) is located at a bend in the U-shaped three-bend air duct.

8. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 1, characterized in that: The air blocking assembly comprises a fixed ring (3), a mounting block (6) and a plurality of cooperating fins (9); the fixed ring (3) is rotatably mounted on the inner wall of the body (1); the mounting block (6) is mounted on the rotating shaft of the rotor; a directional connecting rod (7) is mounted between the outer wall of the mounting block (6) and the inner wall of the fixed ring (3); and the cooperating fins (9) and the directional connecting rod (7) are rotatably connected.

9. The internal air-cooled plunger pump direct-drive permanent magnet motor with a vibration reduction and stabilization structure according to claim 8, characterized in that: The directional connecting rods (7) are arranged in a ring array along the central point position of the mounting block (6), and a connecting spring (8) is installed at one end of the directional connecting rods (7) corresponding to the fixing ring (3).

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