Permanent magnet gear half-direct drive system for diaphragm pump

Abstract

The utility model relates to a kind of permanent magnet gear half direct drive system for diaphragm pump, it is related to gear box technical field, it includes permanent magnet motor and gear box;Permanent magnet motor includes shell and motor assembly, motor assembly is connected with shell;Gear box includes box shell, gear ring, planet wheel and planet carrier, gear ring is connected with box shell, planet wheel is engaged with gear ring and rotatably installed on planet carrier, planet carrier is rotatably connected with box shell;Shell is connected with box shell, the output shaft of motor assembly is set as gear shaft, gear shaft is engaged with planet wheel.It can simplify structure, reduce assembly difficulty, shorten transmission chain, improve transmission efficiency, reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and more specifically, to a semi-direct drive system for a diaphragm pump using a permanent magnet gear. Background Technology

[0002] Semi-drive permanent magnet motors are low-speed, high-torque drive devices primarily used in metallurgy, mining, hoisting and transportation, and construction machinery. This device improves torque output efficiency by combining a permanent magnet motor with a gearbox, reducing energy consumption by approximately 30% compared to traditional asynchronous motor drive systems under the same load and duty cycle. Currently, when integrating permanent magnet motors and gearboxes, the output shaft of the permanent magnet motor is typically connected to the input shaft of the gearbox via a spline or similar structure. With the development of permanent magnet motors, the drive systems of mechanical equipment are also undergoing transformation.

[0003] The inventors discovered that the combination structure of the permanent magnet motor and gearbox in the related technology has at least the following drawbacks: The existing connection method between permanent magnet motors and gearboxes is complex, with a long transmission chain and low transmission efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a permanent magnet gear semi-direct drive system for diaphragm pumps, which simplifies the structure, reduces assembly difficulty, shortens the transmission chain, improves transmission efficiency, and reduces maintenance costs.

[0005] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a permanent magnet gear semi-direct drive system for a diaphragm pump, comprising: A permanent magnet motor and a gearbox; the permanent magnet motor includes a housing and a motor assembly, the motor assembly being connected to the housing; the gearbox includes a housing, a ring gear, planetary gears and a planet carrier, the ring gear being connected to the housing, the planetary gears meshing with the ring gear and rotatably mounted on the planet carrier, the planet carrier being rotatably connected to the housing; The housing is connected to the box shell, and the output shaft of the motor assembly is configured as a gear shaft, which meshes with the planetary gear.

[0006] In an optional embodiment, the housing includes an input housing, an output housing, and an end cover. The input housing is fixedly connected to the gear ring, and the gear ring is fixedly connected to the output housing. The gear ring is located between the input housing and the output housing. The end cover is connected to the input housing. The gear shaft passes through both the end cover and the input housing.

[0007] In an optional embodiment, the gearbox further includes a first bearing and a second bearing, the planetary carrier being rotatably connected to the input housing via the first bearing, and the planetary carrier being rotatably connected to the output housing via the second bearing.

[0008] In an optional embodiment, the input housing is provided with a clearance through hole, and an annular positioning groove is provided at one end of the clearance through hole near the output housing, and the outer ring of the first bearing is embedded in the annular positioning groove.

[0009] In an optional embodiment, the gearbox further includes a through cover; the output housing is provided with a mounting through hole, the outer ring of the second bearing is inserted into the mounting through hole, the through cover is connected to the side of the output housing away from the input housing, and a portion of the through cover is inserted into the mounting through hole and contacts the outer ring of the second bearing; the planetary carrier extends out of the through cover.

[0010] In an optional embodiment, the diaphragm pump semi-direct drive system with permanent magnet gear further includes a cooling coil installed inside the housing; the housing is provided with inlet and outlet water ports communicating with the cooling coil.

[0011] In an optional embodiment, the cooling coil includes a plurality of arc-shaped pipe segments connected in sequence in its extension direction, with a bend between adjacent arc-shaped pipe segments, and the bending directions of adjacent bends being opposite; the arc-shaped pipe segments extend in the circumferential direction of the planetary carrier.

[0012] In an optional implementation, the arc-shaped pipe segment is configured as a superior arc pipe.

[0013] In an optional embodiment, the gearbox further includes a venting device and an oil level indicator. The venting device is installed on the top of the gearbox housing, and the oil level indicator is installed on the side of the gearbox housing near the permanent magnet motor to monitor whether the gearbox housing is leaking oil.

[0014] In an optional embodiment, a viewing window is provided on the housing; Or / and, the housing is provided with a lifting device.

[0015] The beneficial effects of the permanent magnet gear semi-direct drive system for diaphragm pumps provided in this embodiment of the invention include: In summary, the permanent magnet gear semi-direct drive system for diaphragm pumps provided in this embodiment uses a gear shaft as the output shaft of the motor assembly. This gear shaft directly meshes with the planetary gears, eliminating the need for a sun gear inside the gearbox, or integrating the sun gear directly onto the gear shaft of the motor assembly. This simplifies the structure. The torque of the motor assembly is directly transmitted to the planetary gears through the gear shaft. Compared to the traditional method where torque is transmitted from the output shaft to the sun gear and then to the planetary gears, this shortens the transmission chain, improves transmission efficiency, and achieves energy savings of over 10% compared to traditional drive systems. Furthermore, eliminating the sun gear reduces the number of components, resulting in a simpler system structure, higher reliability, and lower maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-view structural schematic diagram of the permanent magnet gear semi-direct drive system for the diaphragm pump provided in this embodiment; Figure 2 for Figure 1 Schematic diagram of the structure in direction A; Figure 3 This is a partial cross-sectional view of the semi-direct drive system for a diaphragm pump using permanent magnet gears provided in this embodiment; Figure 4 This is a schematic diagram of the cooling coil structure provided in this embodiment.

[0018] icon: 100-Permanent magnet motor; 110-Housing; 111-Inlet / outlet; 120-Motor assembly; 121-Gear shaft; 130-Lifting device; 200-Gearbox; 210-Box housing; 211-Input housing; 2111-Annular groove; 2112-Annular positioning groove; 212-Output housing; 2121-Visual window; 2122-Inlet / outlet; 213-End cover; 220-Gear ring; 230-Planet gear; 240-Planet carrier; 241-Straight key; 250-First bearing; 260-Second bearing; 270-Through cover; 280-Ventilation device; 290-Oil level indicator; 300-Cooling coil; 310-Arc-shaped pipe section; 320-Bend; 400-Fastening bolt. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0024] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0025] The overall structure, working principle, and technical effects of the device A provided by this utility model are described in detail below through embodiments and in conjunction with the accompanying drawings.

[0026] Please refer to Figures 1-3In this embodiment, the permanent magnet gear semi-direct drive system for the diaphragm pump includes a permanent magnet motor 100 and a gearbox 200; the permanent magnet motor 100 includes a housing 110 and a motor assembly 120, the motor assembly 120 being connected to the housing 110; the gearbox 200 includes a housing 210, a gear ring 220, planetary gears 230 and a planet carrier 240, the gear ring 220 being connected to the housing 210, the planetary gears 230 meshing with the gear ring 220 and rotatably mounted on the planet carrier 240, the planet carrier 240 being rotatably connected to the housing 210; the housing 110 is connected to the housing 210, and the output shaft of the motor assembly 120 is configured as a gear shaft 121, the gear shaft 121 meshing with the planetary gears 230.

[0027] As described above, the working principle of the permanent magnet gear semi-direct drive system for diaphragm pumps provided in this embodiment is as follows: After the permanent magnet motor 100 is powered on and started, the motor assembly 120 operates, and the output shaft rotates, driving the planetary gear 230 to rotate. The planetary gear 230 meshes with the internal gear ring 220. While rotating on its own axis on the planetary carrier 240, the planetary gear 230 also revolves around the axis of the planetary carrier 240, thereby driving the planetary carrier 240 to rotate. The planetary carrier 240 is connected to the load, thus realizing the output of torque.

[0028] It should be understood that the output shaft of the motor assembly 120 is the gear shaft 121, which directly meshes with the planetary gears 230. This eliminates the need for a sun gear inside the gearbox 200, or in other words, integrates the sun gear directly onto the gear shaft 121 of the motor assembly 120, simplifying the structure. The torque of the motor assembly 120 is directly transmitted to the planetary gears 230 through the gear shaft 121. Compared to the traditional method where torque is transmitted through the output shaft to the sun gear and then to the planetary gears 230, this shortens the transmission chain, improves transmission efficiency, and saves more than 10% energy compared to traditional drive systems. Furthermore, eliminating the sun gear reduces the number of parts, resulting in a simpler system structure, higher reliability, and lower maintenance costs.

[0029] The following embodiments illustrate the details of the permanent magnet gear semi-direct drive system for diaphragm pumps of this application by way of example.

[0030] Please refer to Figures 1-4 In this embodiment, optionally, the permanent magnet gear semi-direct drive system for the diaphragm pump includes a permanent magnet motor 100, a gearbox 200, a cooling coil 300, and fastening bolts 400. The permanent magnet motor 100 is fixedly connected to the gearbox 200 by the fastening bolts 400, and the cooling coil 300 is installed inside the gearbox 200 for cooling the lubricating oil.

[0031] Optionally, the permanent magnet motor 100 includes a housing 110 and a motor assembly 120. The motor assembly 120 includes a stator assembly and a rotor assembly, both of which are mounted within the housing 110. The rotor assembly has an output shaft, which is configured as a gear shaft 121, meaning that a gear groove is provided on the outer circumferential surface of the output shaft. After assembly, the portion of the output shaft with the gear shaft 121 extends out of the housing 110 and can be connected to the gearbox 200 for transmission.

[0032] Furthermore, one end of the housing 110 is open and the other end is closed, with the gear shaft 121 extending from the open end of the housing 110. At the same time, a plurality of threaded holes are provided at the open end of the housing 110, and the plurality of threaded holes are evenly spaced around the open end.

[0033] In addition, a water cooling device can be configured inside the permanent magnet motor 100. For example, water cooling pipes can be arranged inside, and inlet and outlet 111 connected to the water cooling pipes can be provided on the housing 110. Coolant is input into the water cooling pipes from one inlet and outlet 111 and then discharged from the other inlet and outlet 111 to realize the circulation of coolant. During the flow of coolant, the heat generated by the permanent magnet motor 100 can be carried away.

[0034] In other embodiments, optionally, a lifting device 130 may be provided on the housing 110. For example, multiple lifting rings may be provided, which are rotatably connected to the housing 110 to facilitate the lifting of the permanent magnet motor 100.

[0035] Optionally, the gearbox 200 includes a housing 210, a ring gear 220, planetary gears 230, a planetary carrier 240, a first bearing 250, a second bearing 260, a cover 270, a cooling coil 300, a venting device 280, and an oil level indicator 290. The ring gear 220 is connected to the housing 210. The planetary gears 230 mesh with the ring gear 220 and are rotatably mounted on the planetary carrier 240. There can be four planetary gears, evenly spaced around the axis of the planetary carrier 240. The planetary carrier 240 is rotatably connected to the housing 210 via the first bearing 250 and the second bearing 260. The cover 270 is connected to the housing 210, and the planetary carrier 240 extends out of the cover 270. The cooling coil 300 is installed on the housing 210 to cool the lubricating oil inside the housing 210. The venting device 280 is installed on the housing 210 to discharge high-pressure gas inside the housing 210. An oil level indicator 290 is installed on the housing 210 to detect whether the housing 210 is leaking oil.

[0036] Meanwhile, the housing 110 and the box housing 210 are fixedly connected by fastening bolts 400, and the connection between the housing 110 and the box housing 210 is sealed. The gear shaft 121 of the motor assembly 120 meshes with all the planetary gears 230 simultaneously. That is, the gear shaft 121 is located within the area enclosed by all the planetary gears 230, and the gear shaft 121 meshes with all the surrounding planetary gears 230. When the gear shaft 121 rotates, it can drive all the planetary gears 230 to rotate together.

[0037] It should be understood that in other embodiments, the number of planetary gears 230 is not limited to four, and can be designed as needed. Each planetary gear 230 can be rotatably connected to the planet carrier 240 through a corresponding pin.

[0038] Optionally, the housing 210 can be designed as a split structure, which facilitates manufacturing. For example, the housing 210 includes an input housing 211, an output housing 212, and an end cover 213. The input housing 211 and the output housing 212 cooperate to clamp the gear ring 220. The input housing 211 and the gear ring 220 can be fixedly connected by welding, and the gear ring 220 and the output housing 212 can be fixedly connected by bolts or other structural components. The gear ring 220 is located between the input housing 211 and the output housing 212, ensuring a stable and reliable position. The end cover 213 can be fixedly connected to the input housing 211 by bolts or other structural components. The input housing 211 is fixedly connected to the open end of the housing 110 by fastening bolts 400. After the permanent magnet motor 100 and the gearbox 200 are installed, the gear shaft 121 passes through both the end cover 213 and the input housing 211.

[0039] Furthermore, the input housing 211 has a concave area around its perimeter forming an annular groove 2111. The input housing 211 has multiple fixing holes communicating with the annular groove 2111, extending along the axis of the input housing 211. After the input housing 211 is mated with the housing 110, the multiple fixing holes and multiple threaded holes correspond and connect one-to-one. The fastening bolt 400 passes through the corresponding fixing hole and is screwed into the threaded hole. Due to the design of the annular groove 2111, the outer side of the input housing 211 does not need to be designed with an outward-facing flange, and the outer diameter of the input housing 211 is basically the same as the outer diameter of the housing 110, resulting in a compact structure. At the same time, the fastening bolt 400 is less prone to collision and loosening within the annular groove 2111.

[0040] Furthermore, the design of the annular groove 2111 gives the input shell 211 a reinforcing rib structure, which also enhances the structural strength of the input shell 211, making it less prone to deformation and damage.

[0041] It should be understood that the end cover 213 has a central hole through which the gear shaft 121 passes. A sealing structure is provided between the gear shaft 121 and the wall of the central hole, which can be an oil seal or a metal sealing ring, etc. Meanwhile, the input housing 211 has a clearance through hole, the diameter of which is larger than that of the central hole. The gear shaft 121 passes through the clearance through hole and has an annular gap with the hole wall, preventing direct contact between the gear shaft 121 and the hole wall, thus reducing wear.

[0042] Furthermore, an annular positioning groove 2112 is provided at the end of the clearance hole near the output housing 212. The outer ring of the first bearing 250 is embedded in the annular positioning groove 2112, and the inner ring of the first bearing 250 is fixed to the outside of the planetary carrier 240 and can be positioned by the shoulder structure on the planetary carrier 240. Alternatively, the inner ring of the first bearing 250 can be positioned by a retaining ring fixed to the planetary carrier 240, etc.

[0043] Optionally, the output housing 212 is provided with a mounting through hole, and the outer ring of the second bearing 260 is inserted into the mounting through hole. The through cover 270 is connected to the side of the output housing 212 away from the input housing 211, and a portion of the through cover 270 is inserted into the mounting through hole and contacts the outer ring of the second bearing 260, restricting the position of the outer ring. The inner ring of the second bearing 260 is fixed to the planetary carrier 240. After installation, the planetary carrier 240 extends out of the through cover 270 from the mounting through hole. It should be understood that a sealing structure can be provided between the through cover 270 and the planetary carrier 240.

[0044] Optionally, a flat key 241 can be installed on the planetary carrier 240 to connect the planetary carrier 240 to the load, thereby realizing the transmission of torque.

[0045] Obviously, flange structures can also be installed on the planetary carrier 240. By using the flange structure to connect with the load, torque transmission can be achieved.

[0046] It should be noted that a visualization window 2121 can be set on the output shell 212 to facilitate viewing the internal operation of the gearbox 200.

[0047] In addition, inlet and outlet water ports 2122 can be provided on the output housing 212, which can be connected to the cooling coil 300. There can be two inlet and outlet water ports 2122, which are connected to two ports of the cooling coil 300 respectively.

[0048] Optionally, the venting device 280 can be configured as a venting cap, which is installed on the top of the output housing 212 to facilitate the maintenance of pressure balance inside and outside the gearbox 200 and prevent excessive internal pressure from causing seal failure.

[0049] Optionally, the oil level indicator 290 can be installed on the input housing 211. The oil level indicator 290 is located at the bottom of the input housing 211 and can detect whether there is an oil leak at the input end of the gearbox 200. That is, when there is an oil leak at the location of the input housing 211, the oil will flow along the input housing 211 to the connection between the input housing 211 and the housing 110, and then be displayed by the oil level indicator 290.

[0050] Optionally, the cooling coil 300 includes a plurality of sequentially connected arc-shaped tube segments 310 in its extending direction, with adjacent arc-shaped tube segments 310 forming a bend 320, and the bending directions of adjacent bends 320 being opposite. The cooling coil 300 is installed between the planetary carrier 240 and the output housing 212, and is located near the bottom of the output housing 212. All the arc-shaped tube segments 310 of the cooling coil 300 extend substantially in the circumferential direction of the planetary carrier 240. Furthermore, the arc-shaped tube segments 310 can be configured as pre-arc tubes.

[0051] During operation, the internal components of the gearbox 200 are lubricated with lubricating oil. The level of the lubricating oil is designed as needed, generally around the centerline of the gearbox 200. The cooling coil 300 is an arc-shaped tube. Taking the cross-section of the housing 210 as a reference, the cooling coil 300 can cover the area where the lubricating oil is located. The coolant flowing in the cooling coil 300 can effectively exchange heat with the lubricating oil, thereby avoiding excessive temperature inside the housing 210, which would affect the normal operation of the gearbox 200.

[0052] The coolant can enter through one inlet / outlet 2122, pass through the cooling coil 300, and exit through the other inlet / outlet 2122. Because the cooling coil 300 is a bent tube with a meandering extension, it has a large heat exchange area and high heat exchange efficiency.

[0053] The diaphragm pump semi-direct drive system with permanent magnet gears provided in this embodiment directly meshes the output shaft of the motor assembly 120 with the planetary gears 230, eliminating the need for a sun gear, shortening the transmission chain, and improving transmission efficiency. Compared with traditional drive systems, it can save more than 10% of energy. At the same time, it has fewer parts, a simpler system structure, higher reliability, and reduced maintenance costs.

[0054] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A permanent magnet gear semi-direct drive system for a diaphragm pump, characterized in that, include: A permanent magnet motor (100) and a gearbox (200); the permanent magnet motor (100) includes a housing (110) and a motor assembly (120), the motor assembly (120) being connected to the housing (110); the gearbox (200) includes a housing (210), a gear ring (220), planetary gears (230) and a planet carrier (240), the gear ring (220) being connected to the housing (210), the planetary gears (230) meshing with the gear ring (220) and rotatably mounted on the planet carrier (240), the planet carrier (240) being rotatably connected to the housing (210); The housing (110) is connected to the box housing (210), and the output shaft of the motor assembly (120) is configured as a gear shaft (121), which meshes with the planetary gear (230).

2. The permanent magnet gear semi-direct drive system for diaphragm pumps according to claim 1, characterized in that: The housing (210) includes an input housing (211), an output housing (212), and an end cover (213). The input housing (211) is fixedly connected to the gear ring (220), and the gear ring (220) is fixedly connected to the output housing (212). The gear ring (220) is located between the input housing (211) and the output housing (212). The end cover (213) is connected to the input housing (211). The gear shaft (121) passes through both the end cover (213) and the input housing (211).

3. The permanent magnet gear semi-direct drive system for diaphragm pumps according to claim 2, characterized in that: The gearbox (200) further includes a first bearing (250) and a second bearing (260). The planetary carrier (240) is rotatably connected to the input housing (211) via the first bearing (250), and the planetary carrier (240) is rotatably connected to the output housing (212) via the second bearing (260).

4. The permanent magnet gear semi-direct drive system for diaphragm pumps according to claim 3, characterized in that: The input housing (211) is provided with a clearance through hole, and an annular positioning groove (2112) is provided at one end of the clearance through hole near the output housing (212). The outer ring of the first bearing (250) is embedded in the annular positioning groove (2112).

5. The permanent magnet gear semi-direct drive system for diaphragm pumps according to claim 3, characterized in that: The gearbox (200) also includes a through cover (270); the output housing (212) is provided with a mounting through hole, the outer ring of the second bearing (260) is inserted into the mounting through hole, the through cover (270) is connected to the side of the output housing (212) away from the input housing (211), and a portion of the through cover (270) is inserted into the mounting through hole and contacts the outer ring of the second bearing (260); the planetary carrier (240) extends out of the through cover (270).

6. The permanent magnet gear semi-direct drive system for a diaphragm pump according to any one of claims 1-5, characterized in that: The diaphragm pump permanent magnet gear semi-direct drive system also includes a cooling coil (300), which is installed inside the housing (210); the housing (210) is provided with an inlet and outlet (2122) that communicate with the cooling coil (300).

7. The permanent magnet gear semi-direct drive system for diaphragm pumps according to claim 6, characterized in that: The cooling coil (300) includes a plurality of arc-shaped pipe segments (310) connected in sequence in its extension direction, and a bend (320) is formed between adjacent arc-shaped pipe segments (310), and the bending directions of adjacent bends (320) are opposite; the arc-shaped pipe segments (310) extend in the circumferential direction of the planetary carrier (240).

8. The permanent magnet gear semi-direct drive system for diaphragm pumps according to claim 7, characterized in that: The arc-shaped pipe section (310) is configured as a superior arc pipe.

9. The permanent magnet gear semi-direct drive system for a diaphragm pump according to any one of claims 1-5, characterized in that: The gearbox (200) also includes a venting device (280) and an oil level indicator (290). The venting device (280) is installed on the top of the housing (210). The oil level indicator (290) is installed on the side of the housing (210) near the permanent magnet motor (100) and is used to monitor whether the housing (210) is leaking oil.

10. The permanent magnet gear semi-direct drive system for a diaphragm pump according to any one of claims 1-5, characterized in that: A visualization window (2121) is provided on the housing (210); Or / and, a lifting device (130) is provided on the housing (110).

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