A grinding device capable of improving the smoothness of impeller flow channel

Abstract

The invention discloses a grinding device capable of improving the smoothness of an impeller flow channel, comprising a sand box, corundum, an impeller, a sleeve shaft, a bearing box and a variable frequency speed regulating motor, wherein the sand box is a hollow structure, and one end of the variable frequency speed regulating motor is penetrated by a main shaft with a cylindrical structure. The invention has the following beneficial effects: corundum is continuously thrown out by impeller blades through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller flow channel profile. Since corundum has fine grains and high hardness, the impeller flow channel is polished smooth by flushing the impeller flow channel. The invention can easily and quickly remove casting burrs and sand inclusions in the impeller flow channel, and can greatly improve the smoothness in the impeller flow channel. A large amount of corundum fine grains are flushed on the inner wall of the impeller flow channel, while ensuring that the device is more efficient in grinding and removing burrs from the impeller flow channel, the device also covers the position and angle of the impeller flow channel grinding work more comprehensively and removes burrs more thoroughly.

Description

Technical Field

[0001] The invention relates to a grinding device, in particular to a grinding device capable of improving the smoothness of an impeller flow channel, and belongs to the technical field of application of grinding devices for impeller flow channels. Background Art

[0002] When the pump is running, the smoothness of the impeller flow channel has a certain influence on the pump efficiency. Since the impeller flow channel of the centrifugal pump is a curved streamline and is sandwiched between the front and rear cover plates, the casting burrs and sand inclusions in the impeller flow channel are not easy to remove by manual grinding. The main function of the grinding device is to automatically remove the casting burrs and sand inclusions in the impeller flow channel.

[0003] The existing grinding devices for impeller flow channels still have many shortcomings when in use. Most of the existing grinding devices for impeller flow channels scrape and remove casting burrs and sand inclusions in the form of contact with the impeller flow channel when the impeller rotates. This method is not only inefficient in removing casting burrs and sand inclusions, but also the position and angle of the impeller grinding work on the impeller flow channel are not fully covered, resulting in the grinding device not completely and thoroughly removing casting burrs and sand inclusions from the impeller slideway. In addition, when the impeller rotates to scrape and remove casting burrs and sand inclusions on the impeller slideway, the impeller is prone to shaking, resulting in poor safety and reliability of the grinding device and easy damage to the impeller and the impeller slideway. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that most of the existing grinding devices for impeller flow channels scrape and remove casting burrs and sand inclusions in the form of contact with the impeller flow channel when the impeller rotates. This method is not only inefficient in removing casting burrs and sand inclusions, but also the impeller does not fully cover the position and angle of the impeller flow channel grinding work, resulting in the grinding device not completely and thoroughly removing casting burrs and sand inclusions from the impeller slideway; and when the impeller rotates to scrape and remove casting burrs and sand inclusions from the impeller slideway, the impeller is prone to shaking, resulting in poor safety and reliability of the grinding device, and the impeller and impeller slideway are easily damaged. A grinding device that can improve the smoothness of the impeller flow channel is proposed.

[0005] The purpose of the present invention can be achieved through the following technical solutions: a grinding device capable of improving the smoothness of an impeller flow channel, comprising a sand box, corundum, an impeller, a sleeve shaft, a bearing box and a variable frequency speed regulating motor, wherein the sand box is a hollow structure, and a main shaft with a cylindrical structure is penetrated at one end of the variable frequency speed regulating motor, the main shaft penetrates the right side wall of the sand box, and a bearing box is sleeved at the connection between the main shaft and the sand box, a sleeve shaft is sleeved at one end of the main shaft, and an impeller is sleeved at one end of the sleeve shaft, and an impeller is installed at one end of the impeller with an impeller locking nut. After the impeller is installed, the impeller is locked and fixed by the impeller locking nut, which ensures that the impeller is more stable and reliable when working, and makes the installation, use or disassembly of the impeller more convenient;

[0006] The sand box is filled with corundum, one end of the main shaft, the sleeve shaft and the impeller are all connected to the inside of the sand box, and the covering height of the corundum in the sand box is consistent with the top height of the impeller;

[0007] A bearing assembly is arranged inside the bearing box, and the bearing assembly includes a ball bearing and a cylindrical roller bearing.

[0008] A further technical improvement of the present invention is that a motor mounting base is provided under the variable frequency speed regulating motor, and a frequency converter is electrically connected inside the variable frequency speed regulating motor, and the variable frequency speed regulating motor is controlled by the frequency converter to adjust the speed by frequency conversion, so that the impeller reaches the speed when the diamond sand flushing effect is optimal.

[0009] A further technical improvement of the present invention is that: a plurality of blades of equal arc are arranged on the impeller, and a variable frequency speed regulating motor is rotatably connected to the impeller through a main shaft and a sleeve shaft, and the speed is adjusted by the variable frequency speed regulating motor, and the main shaft is driven to rotate through the bearing, and the impeller rotates accordingly in the corundum, and the corundum is continuously thrown out through the impeller flow channel by the impeller blades, and the throwing direction is consistent with the direction of the impeller flow channel profile line. Since the corundum has fine grains and high hardness, the impeller flow channel is polished smooth by flushing the impeller flow channel. The present invention can easily and quickly remove casting burrs and sand inclusions in the impeller flow channel, and can greatly improve the smoothness of the impeller flow channel. A large amount of corundum fine grains are flushed on the inner wall of the impeller flow channel, while ensuring that the device is more efficient in grinding and removing burrs in the impeller flow channel, the device also makes the position and angle coverage of the impeller flow channel grinding work more comprehensive and the burrs are removed more thoroughly.

[0010] A further technical improvement of the present invention is that a sand box closing door is provided on the left end side wall of the sand box, and a sand injection hole is provided on the top of the sand box, through which the staff can conveniently inject corundum into the sand box, a screw plug is threadedly connected to the inside of the sand injection hole, and after the sand box is filled with sand, the sand box is sealed by installing the screw plug.

[0011] A further technical improvement of the present invention is that the main shaft and the ball bearing and the cylindrical roller bearing are all arranged through, and the main shaft and the ball bearing and the cylindrical roller bearing are all rotatably connected, the ball bearing controls the left and right movement of the main shaft, and the cylindrical roller bearing controls the radial shaking of the main shaft, and the corundum is continuously thrown out by the impeller blades through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller flow channel profile. Since the corundum is fine-grained and high-hardness, the impeller flow channel is polished smooth by flushing the impeller flow channel.

[0012] A further technical improvement of the present invention is that a coupling is arranged on the main shaft to ensure that the main shaft can be installed, used or disassembled very conveniently and quickly, and bolts are installed through both ends of the coupling, which ensures that the coupling works more firmly and makes the installation and disassembly of the coupling more convenient.

[0013] The working method of the device specifically comprises the following steps:

[0014] Step 1: Install the impeller horizontally on the sleeve shaft, fix it with the impeller locking nut, and then install the sleeve shaft on the main shaft. After the impeller is installed, close the sand box closed door. After the impeller is installed, inject sand into the sand box through the sand injection hole, and cover the impeller with corundum to the height of the outer circle of the impeller diameter. After the corundum is dry and does not need to be compacted, seal it with a screw plug;

[0015] Step 2: The variable frequency speed regulating motor is adjusted through the frequency converter to adjust the impeller speed to the specified speed, that is, the speed when the corundum scouring effect is optimal. The main shaft is driven to rotate through the bearing, and the impeller rotates in the corundum. The ball bearing controls the left and right movement of the main shaft, and the cylindrical roller bearing controls the radial shaking of the main shaft. The corundum is continuously thrown out by the impeller blades through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller flow channel profile. Since the corundum is fine-grained and high-hardness, the impeller flow channel is polished smooth by scouring the impeller flow channel.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The impeller in the present invention is horizontally installed on the sleeve shaft and fixed with an impeller locking nut. Then the sleeve shaft is installed on the main shaft. The speed is adjusted by a variable frequency speed regulating motor. The main shaft is driven to rotate through the bearing. The impeller rotates in the corundum. The corundum is continuously thrown out by the impeller blades through the impeller flow channel. It is thrown out by centrifugal force at high speed. The throwing direction is consistent with the direction of the impeller flow channel profile. Since the corundum is fine-grained and has high hardness, the corundum is flushed through the impeller flow channel while being thrown out, and the impeller blades and the surface of the impeller flow channel are polished smooth. Without damaging the flow channel profile, the present invention can easily and quickly remove casting burrs and sand inclusions in the impeller flow channel, and can greatly improve the smoothness of the impeller flow channel. A large amount of corundum fine particles are used to flush the inner wall of the impeller flow channel. While ensuring that the device is more efficient in grinding and removing burrs from the impeller flow channel, since most centrifugal pump blades are twisted blades, their flow surface profiles are in oblique contact with the front and rear cover plates of the impeller, and are therefore not easily touched by manual grinding. Through this device, the position and angle of the impeller flow channel grinding work can be more comprehensively covered, and the burrs can be removed more thoroughly.

[0018] 2. The present invention removes burrs by flushing the inner wall of the impeller channel with a large amount of corundum fine particles, thereby avoiding direct scraping contact between the impeller and the impeller channel to remove burrs. While ensuring the safety and higher reliability of the device, it also avoids damage to the impeller channel and the impeller, thereby increasing the service life of the device and the impeller channel. The sleeve shaft of the present invention is connected to the motor main shaft, and the impeller is installed on the sleeve shaft. The staff designs a plurality of sleeve shafts of different specifications according to the different apertures of the impeller, so that impellers of different apertures can be interchanged and used, and the device is convenient for grinding and smoothing impeller slideways of different specifications. The device is easy to operate, strong and durable, has good social benefits, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0020] Figure 1 It is an overall cross-sectional front view of the present invention.

[0021] In the figure: 1. sand box; 2. impeller locking nut; 3. corundum; 4. sand box closing door; 5. impeller; 6. sleeve shaft; 7. main shaft; 8. bearing box; 9. bearing assembly; 10. coupling; 11. variable frequency speed regulating motor; 12. motor mounting base; 13. blades; 14. ball bearing; 15. cylindrical roller bearing. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1 As shown, a grinding device capable of improving the smoothness of an impeller flow channel comprises a sand box 1, diamond sand 3, an impeller 5, a sleeve shaft 6, a bearing box 8 and a variable frequency speed regulating motor 11. The sand box 1 is a hollow structure, and a main shaft 7 with a cylindrical structure is penetrated at one end of the variable frequency speed regulating motor 11, the main shaft 7 penetrates the right side wall of the sand box 1, and a bearing box 8 is sleeved at the connection between the main shaft 7 and the sand box 1, a sleeve shaft 6 is sleeved at one end of the main shaft 7, and an impeller 5 is sleeved at one end of the sleeve shaft 6, and an impeller locking nut 2 is installed at one end of the impeller 5. After the impeller 5 is installed, the impeller 5 is locked and fixed by the impeller locking nut 2, which ensures that the impeller 5 is more stable and reliable when working, and makes the installation, use or disassembly of the impeller 5 more convenient;

[0024] The sand box 1 is filled with corundum 3, one end of the main shaft 7, the sleeve shaft 6 and the impeller 5 are all connected to the inside of the sand box 1, and the covering height of the corundum 3 in the sand box 1 is consistent with the top height of the impeller 5;

[0025] A bearing assembly 9 is arranged inside the bearing box 8 , and the bearing assembly 9 includes a ball bearing 14 and a cylindrical roller bearing 15 .

[0026] As a technical optimization solution of the present invention, a motor mounting base 12 is arranged under the variable frequency speed regulating motor 11, and the variable frequency speed regulating motor 11 is electrically connected to a frequency converter inside. The variable frequency speed regulating motor 11 is controlled by the frequency converter to adjust the speed by frequency conversion, so that the impeller 5 reaches the speed when the flushing effect on the corundum 3 is optimal.

[0027] As a technical optimization scheme of the present invention, a plurality of blades 13 are provided on the impeller 5 with equal arcs, and the variable frequency speed regulating motor 11 is rotatably connected to the impeller 5 through the main shaft 7 and the sleeve shaft 6. The speed is adjusted by the variable frequency speed regulating motor 11, and the main shaft 7 is driven to rotate through the bearing, and the impeller 5 rotates in the corundum 3 accordingly. The corundum 3 is continuously thrown out by the impeller 5 blades 13 through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller 5 flow channel profile. Since the corundum 3 is fine-grained and has high hardness, the impeller flow channel is polished smooth by flushing the impeller flow channel. The present invention can easily and quickly remove casting burrs and sand inclusions in the impeller flow channel, and can greatly improve the smoothness of the impeller flow channel. A large amount of corundum 3 fine grains are flushed on the inner wall of the impeller flow channel, while ensuring that the device is more efficient in grinding and removing burrs from the impeller flow channel, the device also covers the position and angle of the impeller flow channel grinding work more comprehensively and removes burrs more thoroughly.

[0028] As a technical optimization scheme of the present invention, a sand box closing door 4 is provided on the left side wall of the sand box 1, and a sand injection hole is provided on the top of the sand box 1, through which the staff can conveniently inject corundum 3 into the sand box 1, and a screw plug is threadedly connected inside the sand injection hole. After the sand box 1 is filled with sand, the sand box 1 is sealed by installing the screw plug.

[0029] As a technical optimization scheme of the present invention, the main shaft 7, the ball bearing 14 and the cylindrical roller bearing 15 are all arranged through, and the main shaft 7, the ball bearing 14 and the cylindrical roller bearing 15 are all rotatably connected. The ball bearing 14 controls the left and right movement of the main shaft 7, and the cylindrical roller bearing 15 controls the radial shaking of the main shaft 7. The corundum 3 is continuously thrown out by the impeller 5 blades 13 through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller 5 flow channel profile. Since the corundum 3 is fine-grained and has a high hardness, the impeller flow channel is polished smooth by flushing the impeller flow channel.

[0030] As a technical optimization solution of the present invention, a coupling 10 is provided on the main shaft 7 to ensure that the installation, use or disassembly of the main shaft 7 is very convenient and quick, and bolts are installed through both ends of the coupling 10, which ensures that the coupling 10 works more firmly and makes the installation and disassembly of the coupling 10 more convenient.

[0031] The working method of the device specifically comprises the following steps:

[0032] Step 1: Install the impeller 5 horizontally on the sleeve shaft 6, fix it with the impeller locking nut 2, and then install the sleeve shaft 6 on the main shaft 7. After the impeller 5 is installed, close the sand box closed door 4. After the impeller 5 is installed, inject sand into the sand box 1 through the sand injection hole, and cover the impeller 5 with corundum 3 until the height of the outer circle of the impeller 5 diameter. After the corundum 3 is dry and does not need to be compacted, seal it with a screw plug;

[0033] Step 2: The variable frequency speed regulating motor 11 is adjusted through the frequency converter to adjust the speed of the impeller 5 to the specified speed, that is, the speed when the corundum 3 has the best flushing effect. The main shaft 7 is driven to rotate through the bearing, and the impeller 5 rotates in the corundum 3 accordingly. The ball bearing 14 controls the left and right movement of the main shaft 7, and the cylindrical roller bearing 15 controls the radial shaking of the main shaft 7. The corundum 3 is continuously thrown out by the impeller 5 blades 13 through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller 5 flow channel profile. Since the corundum 3 is fine-grained and has a high hardness, the impeller flow channel is polished smooth by flushing the impeller flow channel.

[0034] The beneficial effects of the present invention are:

[0035] 1. The impeller 5 in the present invention is horizontally installed on the sleeve shaft 6 and fixed with the impeller locking nut 2. Then the sleeve shaft 6 is installed on the main shaft 7. The speed is adjusted by the variable frequency speed regulating motor 11. The main shaft 7 is driven to rotate through the bearing, and the impeller 5 rotates in the corundum 3. The corundum 3 is continuously thrown out by the impeller 5 blades 13 through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller 5 flow channel profile. Since the corundum 3 is fine-grained and has high hardness, the impeller flow channel is polished smooth by flushing the impeller flow channel. The present invention can easily and quickly remove casting burrs and sand inclusions in the impeller flow channel, and can greatly improve the smoothness of the impeller flow channel. A large amount of corundum 3 fine particles are used to flush the inner wall of the impeller flow channel. While ensuring that the device is more efficient in grinding and removing burrs from the impeller flow channel, the device also covers the position and angle of the impeller flow channel grinding work more comprehensively and removes burrs more thoroughly.

[0036] 2. The present invention removes burrs by flushing the inner wall of the impeller channel with a large amount of fine diamond sand 3, thereby avoiding direct scraping contact between the impeller 5 and the impeller channel to remove burrs. While ensuring the safety and reliability of the device, it also avoids damage to the impeller channel and the impeller 5, thereby increasing the service life of the device and the impeller channel. The sleeve shaft 6 of the present invention is connected to the motor main shaft 7, and the impeller 5 is mounted on the sleeve shaft 6. The staff designs a plurality of sleeve shafts 6 of different specifications according to the different apertures of the impeller 5, so that the impellers 5 of different apertures can be interchanged and used, and the device is convenient for grinding and smoothing the impeller slideways of different specifications. The device is easy to operate, strong and durable, has good social benefits, and is suitable for popularization and use.

[0037] 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. A working method of a grinding device capable of improving the smoothness of an impeller flow passage, comprising a grinding device capable of improving the smoothness of an impeller flow passage, characterized in that: The grinding device comprises a sand box (1), diamond sand (3), an impeller (5), a sleeve shaft (6), a bearing box (8) and a variable frequency speed regulating motor (11), wherein the sand box (1) is a hollow structure, and a main shaft (7) with a cylindrical structure is penetrated at one end of the variable frequency speed regulating motor (11), the main shaft (7) penetrates the right side wall of the sand box (1), and a bearing box (8) is sleeved at the connection between the main shaft (7) and the sand box (1), one end of the main shaft (7) is sleeved with a sleeve shaft (6), and one end of the sleeve shaft (6) is sleeved with an impeller (5), and one end of the impeller (5) is installed with an impeller locking nut (2); The sand box (1) is filled with corundum (3), one end of the main shaft (7), the sleeve shaft (6) and the impeller (5) are all connected to the inside of the sand box (1), and the coverage height of the corundum (3) in the sand box (1) is consistent with the top height of the impeller (5); A bearing assembly (9) is arranged inside the bearing box (8), and the bearing assembly (9) includes a ball bearing (14) and a cylindrical roller bearing (15); A motor mounting base (12) is provided below the variable frequency speed regulating motor (11), and a frequency converter is electrically connected inside the variable frequency speed regulating motor (11); The main shaft (7) and the ball bearing (14) and the cylindrical roller bearing (15) are all arranged to penetrate each other, and the main shaft (7) and the ball bearing (14) and the cylindrical roller bearing (15) are all rotatably connected; The impeller (5) is provided with a plurality of blades (13) of equal arc, and the variable frequency speed regulating motor (11) is rotationally connected to the impeller (5) via a main shaft (7) and a sleeve shaft (6); The left side wall of the sand box (1) is provided with a sand box closing door (4), and the top of the sand box (1) is provided with a sand injection hole, and a screw plug is connected to the inside of the sand injection hole through a thread; The working method of the device specifically comprises the following steps: Step 1: Install the impeller (5) horizontally on the sleeve shaft (6), fix it with the impeller locking nut (2), and then install the sleeve shaft (6) on the main shaft (7). After the impeller (5) is installed, close the sand box closing door (4). After the impeller (5) is installed, inject sand into the sand box (1) through the sand injection hole, and cover the impeller (5) with corundum (3) until the height of the outer circle of the impeller (5). The corundum (3) is dried and sealed with a screw plug; Step 2: The variable frequency speed regulating motor (11) is adjusted through the frequency converter to adjust the speed of the impeller (5) to a specified speed, that is, the speed when the corundum (3) has the best flushing effect. The main shaft (7) is driven to rotate through the bearing, and the impeller (5) rotates in the corundum (3). The ball bearing (14) controls the main shaft (7) to move left and right, and the cylindrical roller bearing (15) controls the radial shaking of the main shaft (7). The corundum (3) is continuously thrown out by the impeller (5) blades (13) through the impeller flow channel, and the throwing direction is consistent with the direction of the impeller (5) flow channel profile. The impeller flow channel is flushed by the fine grains of corundum (3) and the impeller flow channel is polished smooth.

2. A working method of a grinding device capable of improving the smoothness of an impeller flow channel according to claim 1, characterized in that: The main shaft (7) is provided with a coupling (10), and bolts are installed through both ends of the coupling (10).

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