Driving device and moving equipment for closed containers

Abstract

The present invention provides a driving device and a moving device for a closed container, the driving device for a closed container comprises: a stator and a stator support structure, the stator support structure is used to fix the stator to the closed container; a rotor, a rotor shaft and a rotor support structure, the rotor shaft can be rotatably connected to the closed container through the rotor support structure; a guide vane, which is installed at the lower end of the rotor shaft to rotate with the rotor shaft, and can drive the fluid in the closed container to flow outward from the center of the guide vane. Through the present invention, the technical problem that it is difficult for the moving device in the prior art to ensure a high sealing effect is alleviated.

Description

Technical Field

[0001] The present invention relates to mechanical equipment, in particular to a driving device and a moving device for a closed container. Background Art

[0002] In the field of petrochemicals, process equipment with motion functions is often used. Such equipment is collectively referred to as dynamic equipment. The common driving form of dynamic equipment is that the motor provides a rotational driving force to drive the rotating functional parts to rotate. In some dynamic equipment, the rotating functional parts need to be placed in a closed container to perform operations such as stirring. The sealing effect of these dynamic equipment plays a vital role in the normal operation and safety of the equipment. In particular, dynamic equipment that handles flammable, explosive, highly volatile, radioactive or toxic and hazardous substances has more stringent requirements on the sealing effect.

[0003] Common sealing components include glands, packings, and bellows. Depending on whether the sealing components are in contact with the components of the rotating functional components, they can be divided into contact seals and non-contact seals. Generally speaking, contact seals have better sealing effects, but due to the limitation of friction damage, they are generally only suitable for occasions with low linear speeds on the sealing surface; non-contact seals are suitable for higher speeds, but have poor sealing performance. In order to improve the sealing level, it can be achieved by increasing the clamping force of the packing or adding sealing rings; however, this method will also bring about problems such as increased friction and wear, resulting in a significant increase in energy consumption caused by friction during the operation of the moving equipment. In addition, after the moving equipment has been running for a period of time, the wear of the components will increase, which will lead to reduced sealing effects and increased leakage.

[0004] Therefore, there is a technical problem in the prior art that it is difficult to ensure a high sealing effect for the moving equipment. Summary of the invention

[0005] The object of the present invention is to provide a driving device and a moving device for a closed container, so as to alleviate the technical problem in the prior art that the moving device is difficult to ensure a high sealing effect.

[0006] The above-mentioned purpose of the present invention can be achieved by adopting the following technical solutions:

[0007] The present invention provides a driving device for a closed container, comprising: a stator and a stator supporting structure, wherein the stator supporting structure is used to fix the stator to the closed container; a rotor, a rotor shaft and a rotor supporting structure, wherein the rotor shaft can be rotatably connected to the closed container through the rotor supporting structure; and a guide vane, which is installed at the lower end of the rotor shaft to rotate with the rotor shaft and can drive the fluid in the closed container to flow outward from the center of the guide vane.

[0008] In a preferred embodiment, the guide vane includes a plurality of centrifugal blades distributed around the axis of the rotor shaft.

[0009] In a preferred embodiment, the centrifugal blades are in the shape of a flat plate.

[0010] In a preferred embodiment, the guide impeller includes a guide plate disposed below the centrifugal blades, and the guide plate can prevent the fluid from flowing from bottom to top into between the centrifugal blades.

[0011] In a preferred embodiment, the centrifugal blade has a blade upturned portion located at the outer end thereof, and the lower end contour of the blade upturned portion is inclined upward from the inside to the outside.

[0012] In a preferred embodiment, the guide plate has an annular upturned portion that fits with the upturned portion of the blade.

[0013] In a preferred embodiment, the driving device includes a reducer, and the reducer is drivingly connected to the upper end of the rotor shaft.

[0014] In a preferred embodiment, a shielding cover is provided on the inner side surface of the stator, and a test signal line is connected to the shielding cover.

[0015] The present invention provides a moving device, comprising: a closed container and the above-mentioned driving device for the closed container, wherein the stator support structure fixes the stator to the side wall of the closed container; the rotor shaft is rotatably connected to the closed container through the rotor support structure.

[0016] In a preferred embodiment, the stator is disposed on the inner wall or the outer wall of the closed container.

[0017] The characteristics and advantages of the present invention are:

[0018] The driving device for a sealed container provided by the present invention is applied to a moving device, the rotor is installed in the sealed container of the moving device, and the rotating functional component of the moving device is installed on the upper end of the rotor shaft; the stator generates a changing magnetic field to drive the rotor to rotate, providing a driving force for the rotating functional component. Since the rotor and the rotor shaft are both arranged in the sealed container, it is avoided to set an opening on the sealed container for the rotor shaft to pass through, and the relative movement between the sealing component and the moving component is reduced, so that static sealing can be achieved, which is convenient for achieving a higher level of sealing effect.

[0019] At the same time, the rotor shaft will drive the guide impeller to rotate together. In the closed container, the guide impeller drives the fluid in the closed container to flow outward from the center of the guide impeller. The fluid driven to the surrounding areas will flow in the up and down directions. At the center position of the guide impeller, the fluid will flow to the guide impeller in the up and down directions, so that the fluid in the closed container circulates. When the fluid passes through the rotor or stator, it can take away the heat around it to avoid excessive local temperature, which has a cooling effect and is conducive to the long-term stable operation of the moving equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 creative work.

[0021] Figure 1 A schematic structural diagram of a driving device for a closed container provided by the present invention;

[0022] Figure 2 for Figure 1 The schematic diagram of the structure of the guide impeller in the driving device for the closed container is shown.

[0023] Description of Figure Numbers:

[0024] 10. Sealed container;

[0025] 20. stator; 21. stator support structure;

[0026] 30. rotor; 31. rotor shaft; 32. rotor support structure;

[0027] 40. guide impeller; 41. centrifugal blade; 411. blade upturned portion; 42. guide plate; 421. annular upturned portion;

[0028] 50. Reducer; 60. Shielding cover. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0030] Embodiment 1

[0031] like Figure 1As shown, the present invention provides a driving device for a closed container, comprising: a stator 20, a stator support structure 21, a rotor 30, a rotor shaft 31, a rotor support structure 32 and an impeller 40, wherein the stator support structure 21 is used to fix the stator 20 to the closed container 10; the rotor shaft 31 can be rotatably connected to the closed container 10 through the rotor support structure 32; the impeller 40 is installed at the lower end of the rotor shaft 31 to rotate with the rotor shaft 31, and can drive the fluid in the closed container 10 to flow outward from the center of the impeller 40. When the driving device is used, the rotating functional component of the moving device is installed at the upper end of the rotor shaft 31; the stator 20 generates a changing magnetic field to drive the rotor 30 to rotate, providing driving force for the rotating functional component. Since the rotor 30 and the rotor shaft 31 are both arranged in the closed container 10, it is avoided to set an opening on the closed container 10 for the rotor shaft 31 to pass through, thereby reducing the relative movement between the sealing parts and the moving parts, and static sealing can be achieved. Mechanical external force is used to compress the packing or sealing elements, which is convenient for achieving a higher level of sealing effect without causing friction and wear, which is beneficial to improving the working efficiency of the moving equipment and ensuring the safe operation of the equipment.

[0032] At the same time, the rotor shaft 31 will drive the guide impeller 40 to rotate together. In the closed container 10, the guide impeller 40 drives the fluid in the closed container 10 to flow outward from the center of the guide impeller 40, and the fluid driven to the edges by the guide impeller 40 will flow in the up and down directions; and at the center position of the guide impeller 40, the fluid will flow to the guide impeller 40 in the up and down directions, so that the fluid in the closed container 10 circulates. When the fluid passes through the rotor 30 or the stator 20, it can take away the heat around it, avoid excessive local temperature, play a cooling role, and is beneficial to the long-term stable operation of the moving equipment.

[0033] Specifically, the stator 20 is annular and surrounds the rotor 30. The stator 20 includes a stator coil, which is made of a wire with an insulating layer wound on a frame. The stator coil provides a rotating magnetic field after being energized. Preferably, after the stator coil is processed and formed, it is protected as a whole and sealed and shielded with an epoxy resin with good corrosion resistance to avoid direct contact between the wire and the fluid medium inside the device under power-on conditions, which may cause danger. The wire wound around the stator coil is made of copper wire with good conductivity or wire wrapped with an insulating coating on the surface.

[0034] The stator 20 is fixed to the side wall of the sealed container 10 through the stator support structure 21. In some embodiments, the stator support structure 21 includes bolts, and the stator is detachably fixed to the sealed container 10 through the bolts. In some embodiments, the stator support structure 21 includes an epoxy resin block. During processing and manufacturing, the molten epoxy resin solidifies into an epoxy resin block, and the stator 20 is bonded and fixed to the side wall of the sealed container 10 to improve the firmness of the connection.

[0035] The rotor 30 rotates under the action of the rotating magnetic field. The rotor 30 is made of permanent magnetic silicon steel sheets or magnetic tiles with good magnetic stability; during preparation, the permanent magnetic silicon steel sheets or magnetic tiles are cut and processed according to the design size, and then fixed to the rotor shaft 31.

[0036] The rotor support structure 32 includes a support column, the lower end of which is rotatably connected to the side wall of the closed container 10 via a bearing.

[0037] like Figure 1 As shown, the upper end of the rotor shaft 31 is connected to a reducer 50, the housing of the reducer 50 is fixed to the side wall of the closed container 10, the input shaft of the reducer 50 is connected to the rotor shaft 31, and the rotating functional component is connected to the output shaft of the reducer 50. The speed is reduced by the reducer 50, which is convenient for outputting a larger torque. The rotating functional component is close to the upper part of the closed container 10, and rotates under the drive of the rotor shaft 31, which can better complete the functions such as stirring.

[0038] The stator 20 can be arranged inside the sealed container 10 or outside the sealed container 10. When the stator 20 is arranged outside the sealed container 10, it is convenient to maintain the stator 20. When the stator 20 is working, it will generate a magnetic field around it; in some cases, it is necessary to reduce the interference of the magnetic field on the external environment. Fixing the stator 20 in the sealed container 10 can reduce the leakage of the magnetic field outside the sealed container 10, which is conducive to meeting the working condition requirements.

[0039] In the field of petrochemicals, the fluid processed in the above-mentioned closed container 10 usually has a relatively high viscosity and poor thermal conductivity, which makes it difficult to dissipate heat to the surroundings. When the stator 20 is located in the closed container 10, since a lot of heat will be generated during the operation of the stator 20 when it is powered on, it is easy to cause heat to accumulate around the stator, causing the local temperature to be too high, which is not conducive to the stable operation of the equipment. The rotating functional component connected to the rotor shaft 31 has a large distance from the stator 20 in the axial direction, and the rotating functional component drives the fluid to flow in the closed container 10, generally no strong liquid flow will be formed around the stator 20, making it difficult to take away the heat generated by the stator.

[0040] like Figure 1 and Figure 2As shown, the guide impeller 40 includes an impeller shaft and 6-12 centrifugal blades 41 connected to the impeller shaft. The impeller shaft is connected to the rotor shaft 31, and each centrifugal blade 41 is distributed around the axis of the rotor shaft 31; the impeller shaft can be an integral structure with the rotor shaft 31. The centrifugal blades rotate with the rotor shaft 31. Under the rotating condition, the fluid moves toward the edge due to the centrifugal force, so that a high-pressure area is formed at the edge position, which drives the fluid to flow in the up and down directions, and a low-pressure area is generated at the center position. The fluid flows in the up and down directions between each centrifugal blade 41 to form a specific flow field. When the fluid in the specific flow field flows through the stator 20, it will take away the heat generated by the stator 20, and effectively cool the stator 20.

[0041] Preferably, a gap is provided between the outer side of the stator 20 and the inner wall of the sealed container 10 for the fluid to pass through. In this way, the fluid flows downward on the inner side of the annular stator 20, and flows upward between the outer side of the stator 20 and the inner wall of the sealed container 10, and the flowing fluid is in full contact with the stator 20, thereby optimizing the cooling effect.

[0042] The centrifugal blades 41 may have many shapes. For example, the centrifugal blades 41 are curved and have a curved surface that drives the fluid to rotate. Figure 2 As shown, the centrifugal blade 41 is in the shape of a flat plate. During manufacture, the centrifugal blade 41 can be made of a plate, one end of which is fixed to the impeller shaft by welding, which is easy to process.

[0043] Normally, the stator 20 is located above the guide impeller 40. In order to enhance the cooling effect on the stator 20, the inventor has made further improvements to the guide impeller 40: the guide impeller 40 includes a guide plate 42 disposed below the centrifugal blades 41. The lower end profile of the centrifugal blades 41 is connected to the guide plate 42, and the connection is kept sealed. The guide plate 42 can block the fluid from flowing from bottom to top between each centrifugal blade 41. The guide plate 42 can reduce the flow of the fluid below the guide plate 42 and speed up the flow of the fluid above the guide plate 42. Figure 1 As shown, the arrows in the figure indicate the approximate flow direction of the fluid. Above the guide plate 42, near the center, the fluid flows downward into the guide vane 40. Under the action of the guide vane 40, the fluid moves to the surrounding edge positions and continues to flow upward to form a specific circulating flow field.

[0044] In one embodiment of the present invention, Figure 1 and Figure 2As shown, the centrifugal blade 41 has a blade upturned portion 411 located at its outer end, and the lower end contour of the blade upturned portion 411 is inclined upward from the inside to the outside, so as to guide the fluid to flow upward. The distance between the outermost end of the blade upturned portion 411 and the rotor shaft 31 is greater than the distance between the inner side of the shielding cover 60 and the rotor shaft 31, so as to facilitate the fluid to flow upward from the outer side of the stator 20 and the inner wall of the closed container 10. Preferably, the upper end contour of the blade upturned portion 411 is inclined upward together with the lower end contour.

[0045] Furthermore, the guide plate 42 has an annular upward portion 421 that fits with the blade upward portion 411. The centrifugal blades 41 drive the fluid to move from the center to the surrounding area. When the fluid moves to the top of the annular upward portion 421, the annular upward portion 421 exerts an upward driving force on the fluid, which can drive the fluid to flow upward, so that more fluid flows through the stator, thereby enhancing the cooling effect.

[0046] The guide impeller 40 drives the fluid in the closed container 10 to flow outward from the center of the guide impeller 40, causing the liquid pressure at the edge to increase, driving the liquid to move upward; the centrifugal blades 41 cooperate with the guide plate 42 to make the edge pressure higher, so that the fluid cannot flow from top to bottom, and can only move from bottom to top to complete the diversion, which is beneficial for the high-pressure liquid at the edge of the guide impeller 40 above the guide plate 42 to flow from bottom to top.

[0047] In order to facilitate monitoring of the operating conditions in the sealed container 10, a shielding cover 60 is provided on the inner side of the stator 20, and a test signal line is connected to the shielding cover 60, and the test signal line extends to the outside of the sealed container 10. During the rotation of the rotor, an induced current is generated in the shielding cover 60. By calibrating the test and detecting the induced current, the rotation of the rotor 30 and its linkage components can be monitored in real time.

[0048] Specifically, the shielding cover 60 is cylindrical and can be obtained by bending a stainless steel plate, and can be directly adhered to the inner side of the stator 20 by utilizing the viscosity of epoxy resin.

[0049] Embodiment 2

[0050] The present invention provides a moving device, comprising: a sealed container 10 and the above-mentioned driving device, wherein the stator support structure 21 fixes the stator 20 to the side wall of the sealed container 10; and the rotor shaft 31 is rotatably connected to the sealed container 10 through the rotor support structure 32. The stator 20 can be arranged on the inner wall of the sealed container 10 or on the outer wall of the sealed container 10, and the position of the stator 20 can be set according to the working conditions.

[0051] According to the processing operation to be performed on the fluid in the closed container 10, a corresponding rotating functional component is connected to the upper end of the rotor shaft 31. For example, the rotating functional component is a stirring blade for performing stirring.

[0052] For ease of understanding, a specific example of the dynamic device is provided below:

[0053] Preparation of stator 20 and shielding cover 60: Use plastic-coated copper wire to wind a winding stator 20 with an outer diameter of 200mm, an inner diameter of 160㎜, and a height of 100㎜ on the frame, and use epoxy resin to further insulate and seal the outside; bend a stainless steel sheet with a thickness of 0.2㎜ into a cylinder and adhere it to the inside of the stator coil as a shielding cover 60, and lead out the power line and test signal line at the appropriate position.

[0054] Preparation of the rotor 30 : 10 permanent magnetic silicon steel sheets with a thickness of 10 mm and an outer diameter of 140 mm are installed on the rotor shaft 31 .

[0055] Preparation of guide vane 40: Figure 2 The outer diameter of the centrifugal blade shown is 200 mm.

[0056] The reducer 50 uses a cycloidal pinwheel reducer with a transmission ratio of 1:50; the inner diameter of the sealed container 10 is 300 mm. The stator 20 is energized to drive the rotating functional component 30 to operate. Using a portable non-contact speed tester, the speed of the output shaft of the reducer 50 is measured to be 54 r / min, and the voltage output at the shielding cover 60 is stable. It can be determined that the rotating functional component has achieved effective drive and stable operation.

[0057] The above are only several embodiments of the present invention. Those skilled in the art may make various changes or modifications to the embodiments of the present invention based on the contents disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A driving device for a closed container, used for stirring materials in a closed container in the field of petrochemical industry, characterized in that: include: A stator and a stator support structure, wherein the stator support structure is used to fix the stator to a closed container; A rotor, a rotor shaft and a rotor support structure, wherein the rotor shaft can be rotatably connected to the closed container through the rotor support structure; An impeller is mounted on the lower end of the rotor shaft to rotate with the rotor shaft and can drive the fluid in the closed container to flow outward from the center of the impeller; When the guide vane is driven to rotate, the fluid driven to the edges by the guide vane will flow upward in the up-down direction and flow through the stator; at the center of the guide vane, the fluid will flow downward in the up-down direction toward the guide vane, so that the fluid in the closed container circulates; The guide impeller includes a plurality of centrifugal blades distributed around the axis of the rotor shaft; The guide impeller comprises a guide plate disposed below the centrifugal blades, and the guide plate can prevent the fluid from flowing from bottom to top between the centrifugal blades; The centrifugal blade has a blade upturned portion located at the outer end thereof, and the lower end contour of the blade upturned portion is inclined upward from the inside to the outside; The guide plate has an annular upturned portion that fits with the upturned portion of the blade; The driving device comprises a reducer, and the reducer is drivingly connected to the upper end of the rotor shaft.

2. The driving device for a closed container according to claim 1, characterized in that: The centrifugal blades are in the shape of a flat plate.

3. The driving device for a closed container according to claim 1, characterized in that: A shielding cover is provided on the inner side surface of the stator, and a test signal line is connected to the shielding cover.

4. A moving device, characterized in that: include: Closed container; According to the driving device for a closed container as described in any one of claims 1-2, the stator support structure fixes the stator to the side wall of the closed container; and the rotor shaft is rotatably connected to the closed container through the rotor support structure.

5. The moving device according to claim 4, characterized in that: The stator is arranged on the inner wall of the closed container.

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