Mechanical transmission device for powder preparation

Abstract

The utility model discloses a mechanical transmission device for powder preparation, which comprises a machine body, bearings respectively arranged at two ends of the machine body through bearing seats, a shaft core arranged in the bearings in a penetrating manner, a carbon brush in contact with the surface of the shaft core, a carbon brush mounting frame for fixing the carbon brush, and a powder gas recovery system, comprising a tail gas treatment station, a negative pressure pump, a dust collection joint and a collection channel, the collection channel is formed in a machine body, one end of the collection channel leads to a dust generation area at a shaft core, the other end of the collection channel communicates with the dust collection joint arranged at the end of the machine body, and the dust collection joint is sequentially connected to the negative pressure pump and the tail gas treatment station through a collection pipeline. The mechanical transmission device can effectively remove carbon powder, prolong the service life of the bearing and avoid environmental pollution; and the influence of heat generated in the powder making process on a mechanical transmission device can be reduced through water cooling, and the service life of the bearing is prolonged.

Description

Technical Field

[0001] The utility model belongs to rotating electrode atomization powder making equipment, in particular to a mechanical transmission device used for powder preparation. Background Art

[0002] At present, in domestic plasma rotating electrode atomization powder making equipment, the higher the speed of the equipment, the smaller the powder particle size and the higher the fine powder rate. Due to the limitation of the mechanical transmission device of the plasma power supply, the speed provided by the electric spindle is greatly reduced, resulting in the operating speed of the existing plasma rotating electrode atomization equipment being limited to about 30,000r / min. The powder particles produced are too large and cannot meet the requirements of downstream users. At the same time, Figure 1 As shown, when the mechanical transmission device is working, the shaft core 1 rotates at high speed and rubs against the carbon brush 2 to generate a large amount of powder. The generated powder accumulates on the equipment, causing the imbalance of the mechanical transmission device to increase, thereby causing the vibration to increase when the mechanical transmission is working, further limiting the speed of the mechanical transmission device; part of the generated powder enters the bearing 3 of the body 4, which will shorten the service life of the bearing 3 and generate a large amount of carbon powder to pollute the workshop and the environment. Figure 1 5 is a carbon brush mounting seat, and 6 is an electrode fixing plate.

[0003] Therefore, the existing mechanical transmission device for plasma rotating electrode atomization has the following problems that need to be solved urgently:

[0004] 1. Generate a large amount of carbon powder, which accumulates on the transmission device, causing its imbalance to increase, resulting in greater vibration and the inability to increase the speed of the equipment; carbon powder enters the bearing and affects the bearing life; at the same time, carbon powder pollutes the environment and affects human health.

[0005] 2. During long-term operation, the temperature of the mechanical transmission bearing will gradually increase. If the temperature rises too high, it will affect the service life of the bearing, cause the mechanical transmission device to vibrate and deflect more, aggravate the wear of the carbon brush, and generate a large amount of carbon powder.

[0006] 3. The rotation speed is low, resulting in a low fine powder rate of the powder produced by the equipment, which cannot meet the production needs of customers and has high production costs. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide a mechanical transmission device for powder preparation, which can effectively remove carbon powder, extend the life of bearings and avoid environmental pollution.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A mechanical transmission device for powder preparation includes a machine body, bearings arranged at both ends of the machine body through bearing seats, a shaft core inserted into the bearings, carbon brushes in contact with the surface of the shaft core, and a carbon brush mounting bracket for fixing the carbon brushes. It also includes a powder gas recovery system, including an exhaust gas treatment station, a negative pressure pump, a dust collection joint, and a collection channel. The collection channel is opened in the machine body, one end of which leads to the dust generation area at the shaft core, and the other end is connected to the dust collection joint provided at the end of the machine body. The dust collection joint is connected to the negative pressure pump and the exhaust gas treatment station in sequence through a collection pipeline.

[0010] It also includes a water cooling system, including a chiller, water supply and return pipes, water inlet and return joints at the ends of the machine body, a cooling water channel inside the machine body, and a cooling trough opened on the bearing seat. The chiller is sequentially connected to the cooling trough through the water supply pipe, the water inlet joint, and the cooling water channel, and the cooling trough is sequentially returned to the chiller through the cooling water channel, the return water joint, and the return pipe.

[0011] The return water pipeline is also provided with a temperature sensor for detecting the return water temperature, and the temperature sensor is electrically connected to the chiller.

[0012] It also includes an oil-gas lubrication system, oil supply and return pipelines, oil inlet and return joints provided at the end of the machine body, oil inlet and return channels provided in the machine body and leading into the bearing seat, and an oil injection sleeve provided on the shaft core and connected to the end of the oil inlet channel for lubricating the bearings. The oil-gas lubrication system passes through the oil supply pipeline, the oil inlet joint, and the oil inlet channel to the oil injection sleeve in sequence, and the return oil channel passes through the oil return joint and the oil return pipeline in sequence and returns to the oil-gas lubrication system.

[0013] The oil injection sleeve is arranged between the two bearings, and includes an inner sleeve and an outer sleeve. The inner sleeve is arranged on the shaft core and rotates with the shaft core. The outer sleeve and the inner sleeve are clearance-matched, and the outer sleeve is provided with oil injection holes connected to the oil inlet channel and leading to the bearings on both sides respectively.

[0014] The mechanical transmission device for powder preparation of the utility model has the following advantages:

[0015] 1. Through the powder gas recovery system, a collection channel is opened on the machine body, and a large amount of carbon powder generated during friction and part of the oil mist leaked from the oil and gas lubrication system are discharged to a special exhaust gas treatment device through a negative pressure pump, reducing the impact of powder on the dynamic balance of the device and reducing environmental pollution;

[0016] 2. Through the water cooling system, cooling water is sent through the cooling water channel to the cooling tank to cool the front and rear bearings and the machine body to reduce the impact of thermal deformation on the mechanical transmission device and extend the life of the equipment;

[0017] 3. By detecting the return water temperature to the chiller through a temperature sensor, closed-loop control can be achieved.

[0018] 4. By eliminating the original grease bearing design, the bearing is replaced with an oil-gas lubrication, oil spray sleeve and oil supply system design. The bearing uses oil-gas lubrication to reduce the friction of the bearing balls and increase the speed of the mechanical transmission device to 60,000 rpm or even higher, thereby increasing the fine powder rate of the equipment and reducing the powder production cost under the same conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 is a cross-sectional view of a mechanical transmission device of the prior art;

[0021] Figure 2 It is a side view of the body of the mechanical transmission device for powder preparation of the present invention;

[0022] Figure 3 This is the principle of the powder gas recovery system of this utility model;

[0023] Figure 4 It is along Figure 3 Cross-sectional view along the midline BB;

[0024] Figure 5 It is a principle block diagram of the water cooling system of the utility model.

[0025] Figure 6 This is a schematic diagram of the oil-gas lubrication system of the utility model;

[0026] Figure 7 yes Figure 6 An enlarged cross-sectional view of the body;

[0027] Figure 8 This is a structural diagram of the oil injection spacer of the utility model;

[0028] Figure 9 It is along Figure 8 Cross-sectional view of line AA;

[0029] Figure 10 It is along Figure 8 Cross-sectional view of line BB. DETAILED DESCRIPTION

[0030] The utility model is a mechanical transmission device for powder preparation, such as Figure 2-4As shown, it includes a body 4, bearings 3 disposed at both ends of the body 4 via bearing seats 8a and 8b, a shaft core 1 inserted into the bearing 3, carbon brushes 2 in contact with the surface of the shaft core 1, and a carbon brush mounting bracket 5 for fixing the carbon brushes 2. Unlike the prior art, it also includes a powder gas recovery system, including an exhaust gas treatment station 20, a negative pressure pump 21, a powder gas bus 22, a dust collection connector 23, and a collection channel. The collection channel is opened in the body 4, with one end leading to the dust generation area H at the shaft core 1 and the other end connected to the dust collection connector 23 located at the end of the body 4. The dust collection connector 23 is connected to the negative pressure pump 21 and the exhaust gas treatment station 20 in sequence through a collection pipeline. The collection channel can be formed by a plurality of axially arranged dust conveying holes 24 and a plurality of collection holes 25 radially arranged within the body 4, one end of which is connected to the dust generating area H of the shaft core 1 and the other end of which is connected to the corresponding dust conveying hole 24. The dust conveying holes 24 are respectively connected to the corresponding dust collection joints 23 provided at the end of the body 4. The dust collection joints 23 are connected to the dust-gas bus 22, the negative pressure pump 21, and the exhaust gas treatment station 20 in sequence through collection pipelines. The negative pressure generated by the negative pressure pump 21 discharges the large amount of carbon powder generated during friction and the part of the oil mist leaked from the oil-gas lubrication system 10 described below, and is then treated by the exhaust gas treatment station 20.

[0031] like Figure 5 As shown, the mechanical transmission device for powder preparation of the present invention also includes a water cooling system, including a chiller 30, a water-cooling bus 31, supply and return water pipes 32 and 33, cooling water joints 34 respectively arranged at both ends of the body 4, a cooling water channel arranged in the body 4, and a cooling groove 36 opened on the outer surface of the bearing seat. The chiller 30 is connected to the water supply pipe 32 through the water-cooling bus and connected to the first cooling water channel 35a to the cooling groove 36 on the front bearing seat 8a through the cooling water joint 34 at one end, which can cool the front bearing seat 8a and its bearing 3, and then pass through the axially arranged second cooling water channel 35b to the cooling groove 36 on the rear bearing seat 8b, and then cool the body 4 and the rear bearing 3, and then pass through the third cooling water channel 35c through the cooling water joint 34 at the other end, the return water pipe 33, and the bus 22 and return to the chiller 30.

[0032] In addition, a temperature sensor 37 for detecting the return water temperature and electrically connected to the chiller 30 is provided on the return water pipe 33 , and the detected temperature is transmitted to the chiller 30 to achieve closed-loop control.

[0033] like Figure 6-7As shown, the mechanical transmission device for powder preparation of the present invention also includes an oil-gas lubrication system 10, oil supply and return pipelines 11, 12 respectively connected to the oil-gas lubrication system 10, oil inlet and return joints 13, 14 respectively provided on the body 4 and connected to the oil supply and return pipelines 11, 12, an oil inlet channel 15 connected to the oil inlet joint 11 and leading into the bearing seats 8a, 8b, an oil return channel 16 communicating with the bearing seats 8a, 8b and connected to the oil return joint 12, and an oil injection sleeve 17 provided on the shaft core 1 and connected to the end portion of the oil inlet channel 15 leading into the bearing seat for lubricating the bearing 3.

[0034] Both ends of the machine body 4 are provided with a set of oil inlet and return joints 13, 14 and oil inlet and return channels 15, 16 and oil spray spacer 17, which are used to lubricate the front and rear bearings 3 respectively. Figure 8-10 As shown, a pair of bearings 3 are provided at both ends of the shaft core 1. The oil injection sleeve 17 is provided between the two bearings 3 and includes an inner sleeve 171 and an outer sleeve 172. The inner sleeve 171 is provided on the shaft core 1 and rotates with the shaft core 1. The outer sleeve 172 is loosely fitted with the inner sleeve 171. The outer sleeve 172 is provided with an oil injection hole 173 connected to the oil inlet channel 15 and leading to the balls of the bearings 3 on both sides. Figure 8 The number of the oil injection holes 173 shown in FIG is four, and every two of them lead to the same side.

[0035] The working principle of the mechanical transmission device for powder preparation of the present invention is as follows:

[0036] Step 1. Before operation, open the oil and gas lubrication system 10 and allow the oil and gas to fully enter the oil supply pipe 11, the oil inlet and return channels 15 and 16 of the body 4, the oil injection sleeve 17, the bearing 3 and the oil return pipe 12 to lubricate all parts for about 15 minutes; ensure that the parts of the mechanical transmission device are fully lubricated and prepare to start the machine.

[0037] Step 2. Start the water cooler 20, the water cooling system starts working, and the cooling water enters the mechanical transmission device through the water cooling bus 31 to cool the core components inside, and is fed back to the water cooler through the temperature sensor 37 of the water cooling system to ensure that the temperature of the mechanical transmission device is within the allowable range at all times.

[0038] Step 3. Simultaneously start the powder gas recovery system to prepare for the start-up of the mechanical transmission device, recover the powder gas, and recover a large amount of dust to the dust bus 22 through the negative pressure pump 21. The dust then enters the negative pressure pump 21 and reaches the tail gas treatment station 20. After treatment, it is discharged back into the atmosphere.

[0039] Step 4. Start the high-speed electric spindle of the equipment, drive the mechanical transmission device to run at high speed, and rub the carbon brush 2 to generate a large amount of dust (due to step 3, a large amount of dust is processed and discharged back into the atmosphere). The electric spindle gradually increases the speed, driving the mechanical transmission device to rotate until it reaches the speed required for powder production (the higher the speed, the higher the quality of the powder produced, the higher the fine powder rate, and the higher the output).

[0040] In summary, the present invention utilizes a powder gas recovery system to reduce the impact of powder on equipment and minimize oil, gas, and powder contamination in the workshop. A water cooling system is used to cool the mechanical transmission device, reducing the impact of heat generated during the powder production process on the mechanical transmission device and extending the service life of the bearing 3. The oil-gas lubrication system 10 for the bearing 3 increases the speed and service life of the mechanical transmission device.

[0041] However, those skilled in the art should recognize that the above embodiments are merely intended to illustrate the present invention and are not intended to limit the present invention. Any changes or modifications to the above embodiments shall fall within the scope of the claims of the present invention as long as they are within the spirit of the present invention.

Claims

1. A mechanical transmission device for powder preparation, comprising a body, bearings disposed at both ends of the body via bearing seats, a shaft core inserted into the bearings, carbon brushes in contact with the surface of the shaft core, and a carbon brush mounting bracket for securing the carbon brushes, characterized in that: It also includes a powder gas recovery system, including an exhaust gas treatment station, a negative pressure pump, a dust collection connector, and a collection channel. The collection channel is opened in the machine body, one end leads to the dust generation area at the shaft core, and the other end is connected to the dust collection connector located at the end of the machine body. The dust collection connector is connected to the negative pressure pump and the exhaust gas treatment station in sequence through the collection pipeline.

2. The mechanical transmission device for powder preparation according to claim 1, characterized in that: It also includes a water cooling system, including a chiller, water supply and return pipes, water inlet and return joints at the ends of the machine body, a cooling water channel inside the machine body, and a cooling trough opened on the bearing seat. The chiller is sequentially connected to the cooling trough through the water supply pipe, the water inlet joint, and the cooling water channel, and the cooling trough is sequentially returned to the chiller through the cooling water channel, the return water joint, and the return pipe.

3. The mechanical transmission device for powder preparation according to claim 2, characterized in that: The return water pipeline is also provided with a temperature sensor for detecting the return water temperature, and the temperature sensor is electrically connected to the chiller.

4. The mechanical transmission device for powder preparation according to claim 1, characterized in that: It also includes an oil-gas lubrication system, oil supply and return pipelines, oil inlet and return joints provided at the end of the machine body, oil inlet and return channels provided in the machine body and leading into the bearing seat, and an oil injection sleeve provided on the shaft core and connected to the end of the oil inlet channel for lubricating the bearings. The oil-gas lubrication system passes through the oil supply pipeline, the oil inlet joint, and the oil inlet channel to the oil injection sleeve in sequence, and the return oil channel passes through the oil return joint and the oil return pipeline in sequence and returns to the oil-gas lubrication system.

5. The mechanical transmission device for powder preparation according to claim 4, characterized in that: The oil injection sleeve is arranged between the two bearings, and includes an inner sleeve and an outer sleeve. The inner sleeve is arranged on the shaft core and rotates with the shaft core. The outer sleeve and the inner sleeve are clearance-matched, and the outer sleeve is provided with oil injection holes connected to the oil inlet channel and leading to the bearings on both sides respectively.

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