Heat dissipation type collecting ring device with internal fan structure and working method of heat dissipation type collecting ring device

Abstract

The invention relates to a heat dissipation type collector ring device with an internal fan structure and a working method thereof.The heat dissipation type collector ring device comprises a main shaft, an upper collector ring, a lower collector ring and a centrifugal fan, the main shaft is arranged in an outer cover, the centrifugal fan is installed on the main shaft, and the upper collector ring and the lower collector ring are installed on the centrifugal fan; the upper collecting ring and the lower collecting ring are connected through a collecting ring supporting screw rod, one end of the collecting ring supporting screw rod is matched with a nut to be fixedly connected with the centrifugal fan, a plurality of guide vanes are arranged on the upper collecting ring, internal fan structures are arranged on the upper collecting ring and the lower collecting ring, a plurality of air inlets are formed in the upper end of the outer cover, and air outlets are formed in the lower end of the outer cover. A plurality of air outlets are formed in the lower end of the outer cover, the guide vanes divide airflow entering from the air inlets into two paths, one path flows into the inner side of the collecting ring, the other path flows through the outer side of the collecting ring, the two paths of airflow converge at the centrifugal fan and are exhausted from the air outlets, and dust collecting felts are installed in the air outlets. While the temperature of the carbon brush and the collector ring is reduced, directional collection of carbon powder can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of slip rings, in particular to a heat dissipation slip ring device with an internal fan structure and a working method thereof. Background Art

[0002] Slip rings, also known as conductive rings, slip rings, collector rings, and collector rings, can be used in any electromechanical system that requires continuous rotation while also transmitting power and signals from a fixed position to a rotating one. The carbon brush-slip ring assembly is a critical component of a hydro-turbine generator set. During operation, the slip rings and carbon brushes work together, rotating synchronously with the turbine generator's main shaft. Under spring pressure, the carbon brushes cling to the slip ring surface, generating friction. The contact between the slip ring and the carbon brushes is a current-carrying friction system characterized by strong performance and damage coupling, resulting from the interaction of electrical contact theory and mechanical tribology.

[0003] Due to the coupling effect of electrical contact and mechanical friction, the local temperature of the carbon brush-collector ring device will be too high during operation. Especially after long-term operation, there will be too many carbon powder particles at the carbon brush-collector ring contact interface, which will greatly increase the probability of sparks at the carbon brush-collector ring contact interface and damage the collector ring surface. Summary of the Invention

[0004] The object of the present invention is to provide a heat dissipation type collector ring device with an internal fan structure and a working method thereof, which can realize the directional collection of carbon powder while reducing the temperature of the carbon brush and the collector ring without the need for an additional power source to drive the fan.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a heat dissipation type collector ring device with an internal fan structure, comprising a main shaft, an upper collector ring, a lower collector ring, a centrifugal fan and an internal fan structure, the main shaft being arranged in an outer cover, the centrifugal fan being mounted on the main shaft, the upper collector ring and the lower collector ring being mounted on the centrifugal fan, the centrifugal fan being connected to the main shaft by a key, the upper collector ring and the lower collector ring being connected by a collector ring support screw, one end of the collector ring support screw being matched with a nut to be fixed to the centrifugal fan, a plurality of guide vanes being provided on the upper collector ring, the upper collector ring and the lower collector ring being both provided with an internal fan structure, a plurality of air inlets being provided at the upper end of the outer cover, and a plurality of air outlets being provided at the lower end of the outer cover, the air flow entering the air inlet being divided into two paths by the guide vanes, one path flowing into the inner side of the collector ring, and the other path flowing through the outer side of the collector ring, the two air flows converging at the centrifugal fan and being discharged from the air outlet, a dust collecting felt being installed in the air outlet.

[0006] Furthermore, the centrifugal fan includes a connecting shaft, an upper baffle plate, a lower baffle plate and centrifugal blades. The connecting shaft is fixedly connected to the lower baffle plate, the upper baffle plate is arranged above the lower baffle plate, and a plurality of centrifugal blades are arranged between the lower baffle plate and the upper baffle plate. One end of the collector ring support screw is connected and fixed to the lower baffle plate with a nut.

[0007] Furthermore, the collector ring supporting screw is sleeved in an insulating sleeve.

[0008] Furthermore, the internal fan structure includes a spiral groove and internal fan blades. The internal fan blades are arranged in the internal grooves of the upper collector ring and the lower collector ring. The outer ring surfaces of the upper collector ring and the lower collector ring are provided with a spiral groove connected to the placement groove.

[0009] Furthermore, it also includes an insulating baffle, and the lower end surface of the upper collector ring and the upper end surface of the lower collector ring are respectively provided with an annular groove; the insulating baffle is connected to the upper and lower collector rings through the annular grooves on the upper and lower collector rings.

[0010] Furthermore, the plurality of air inlets and air outlets are arranged along the circumference of the outer side of the outer cover, and the number of the air inlets and air outlets is 6.

[0011] Furthermore, the lower baffle of the centrifugal fan has 6 first threaded holes evenly arranged along the circumference. Furthermore, 24 second threaded holes are evenly arranged along the circumferential direction on the upper end surface of the upper collector ring.

[0012] A method for operating a heat dissipation type collector ring device with an internal fan structure comprises the following steps: Step S1, installing the heat dissipation type collector ring device on the hydro-generator set, starting the hydro-generator set, and the upper collector ring, the lower collector ring and the centrifugal fan rotate synchronously with the main shaft; Step S2: The airflow enters from the air inlet on the outer cover and is split into two paths by the guide vanes, one path flowing into the inner side of the slip ring and the other path flowing through the outer side of the slip ring and the carbon brushes. Step S3: The two air flows converge on the inner side of the centrifugal fan below the collector ring, and are finally discharged from the air outlet on the outer cover under the centrifugal action of the centrifugal fan, while taking away part of the heat and collecting the carbon powder on the dust removal felt.

[0013] Beneficial effects of the present invention: The present invention provides a heat dissipation type collector ring device with an internal fan structure. The device has a simple structure, is safe and reliable, and replaces the previous collector ring with a collector ring with an internal fan structure. At the same time, a spiral groove is opened on the outer ring surface of the collector ring, an insulating baffle is installed between the upper and lower collector rings, and the collector ring is combined with an external centrifugal fan and a guide vane installed on the upper end face of the upper collector ring is added. During the operation of the hydro-turbine generator set, the upper and lower collector rings with the internal fan structure and the centrifugal fan rotate synchronously with the main shaft. Under the joint action of the internal fan structure of the collector ring, the centrifugal fan, the guide vane installed on the upper end face of the upper collector ring and the insulating baffle, the air flow enters from the air inlet on the outer cover, part of which flows into the inner side of the collector ring, and part of which flows through the outer side of the collector ring and the carbon brush. The two parts of the air flow converge on the inner side of the blades of the centrifugal fan below the collector ring, and are finally discharged from the air outlet on the outer cover under the centrifugal action of the centrifugal fan, while taking away part of the heat and collecting carbon powder on the dust removal felt. This solution has a simple structure, is safe and reliable, and does not require an additional power source. While reducing the temperature of the carbon brushes and collector rings, it can also achieve directional collection of carbon powder, greatly reducing the probability of sparks at the carbon brush-collector ring contact interface. This has far-reaching significance for improving the system operation stability of the carbon brush-collector ring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a front view of a heat dissipation type collector ring device with an internal fan structure; FIG2 is a cross-sectional view of a heat dissipation type collector ring device with an internal fan structure; FIG3 is a front view of a heat dissipation type collector ring with an internal fan structure; FIG4 is a cross-sectional view of a heat dissipation type collector ring with an internal fan structure; FIG5 is a top view of a heat dissipation type collector ring with an internal fan structure; FIG6 is a schematic structural diagram of a centrifugal fan.

[0015] Figure 7 Schematic diagram of the structure of the annular groove.

[0016] Among them: 1-main shaft, 2-outer cover, 2.1-air inlet, 2.2-air outlet, 3-collector ring support screw, 4-guide vane, 5-upper collector ring, 5.1-second threaded hole, 5.2-inner fan blade, 5.3-spiral groove, 6-insulating baffle, 7-lower collector ring, 8-insulating sleeve, 9-centrifugal fan, 9.1-fan blade lower baffle, 9.2-first threaded hole, 9.3-centrifugal fan blade, 9.4-fan blade upper baffle, 10-dust collecting felt, 11-annular groove. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] See also Figures 1 to 7 The present invention provides an embodiment: a heat dissipation type collector ring device with an internal fan structure, comprising a main shaft 1, an upper collector ring 5, a lower collector ring 7, a centrifugal fan 9 and an internal fan structure, wherein the main shaft 1 is arranged in an outer cover 2, the centrifugal fan 9 is mounted on the main shaft 1, the upper collector ring 5 and the lower collector ring 7 are mounted on the centrifugal fan 9, the centrifugal fan 9 is connected to the main shaft 1 through a key, the upper collector ring 5 and the lower collector ring 7 are connected through a collector ring support screw 3, and one end of the collector ring support screw 3 is matched with a nut It is connected and fixed to the centrifugal fan 9, and a plurality of guide vanes 4 are provided on the upper collector ring 5. Both the upper collector ring 5 and the lower collector ring 7 are provided with internal fan structures. The upper end of the outer cover 2 is provided with a plurality of air inlets 2.1, and the lower end of the outer cover 2 is provided with a plurality of air outlets 2.2. The air flow entering the air inlet 2.1 is divided into two paths by the guide vanes 4, one path flows into the inner side of the collector ring, and the other path flows through the outer side of the collector ring. The two air flows converge at the centrifugal fan 9 and are discharged from the air outlet 2.2. A dust collecting felt 10 is installed in the air outlet 2.2. The device has a simple structure, is safe and reliable. During the operation of the hydro-generator set, the upper collector ring 5, the lower collector ring 7 and the centrifugal fan 9 with an internal fan structure rotate synchronously with the main shaft 1. Under the joint action of the internal fan structure of the collector ring, the centrifugal fan 9, the guide vanes 4 installed on the upper end face of the upper collector ring 5 and the insulating baffle 6, the airflow enters from the air inlet 2.1 on the outer cover 2, part of which flows into the inner side of the collector ring, and part flows through the outer side of the collector ring and the carbon brushes. The two parts of airflow converge on the inner side of the fan blades of the centrifugal fan 9 below the collector ring. The airflow flowing through the collector ring and the carbon brushes flows the air carrying carbon powder into the air outlet 2.2, taking away some heat while leaving the carbon powder on the dust collecting felt 10. The direction of the airflow can be seen in the figure below. Figure 1 As shown by the arrow in .

[0019] Please continue reading Figure 6 As shown, in one embodiment of the present invention, the centrifugal fan 9 includes a connecting shaft, an upper blade baffle 9.4, a lower blade baffle 9.1, and centrifugal blades 9.3. The connecting shaft is fixedly connected to the lower blade baffle 9.1. The upper blade baffle 9.4 is arranged above the lower blade baffle 9.1. A plurality of centrifugal blades 9.3 are arranged between the lower blade baffle 9.1 and the upper blade baffle 9.4. One end of the slip ring support screw 3 is connected and fixed to the lower blade baffle 9.1 with a nut. The slip ring support screw 3 is insulated.

[0020] Please continue reading Figure 1 As shown, in one embodiment of the present invention, the slip ring support screw 3 is sleeved in the insulating sleeve 8 .

[0021] Please continue reading Figure 3 、 Figure 4As shown, in one embodiment of the present invention, the internal fan structure includes a spiral groove 5.3 and internal blades 5.2. The internal blades 5.2 are disposed within the internal grooves of both the upper and lower slip rings 5 ​​and 7. The outer ring surfaces of both the upper and lower slip rings 5 ​​and 7 are each provided with a spiral groove 5.3 that communicates with the mounting groove. The internal blades 5.2 generate wind when they rotate synchronously with the main shaft 1. The rotation of the slip rings drives the wind generated by the internal fan to be blown out through the spiral groove 5.3.

[0022] Please continue reading Figure 1 、 Figure 7 As shown, one embodiment of the present invention further includes an insulating baffle 6. An annular groove 11 is provided on the lower end surface of the upper slip ring 5 and the upper end surface of the lower slip ring 7, respectively. The insulating baffle 6 is connected to the upper and lower slip rings 7 via the annular grooves 11 on the upper and lower slip rings 5 ​​and 7. The insulating baffle 6 prevents carbon dust from migrating to the inner side of the slip rings under the action of the centrifugal fan 9 and accumulating on the insulating sleeve 8. Furthermore, due to the high oil mist content inside the slip ring 5, the insulating baffle 6 prevents the upper and lower slip rings 7 from short-circuiting.

[0023] Please continue reading Figures 1 to 6 As shown, in one embodiment of the present invention, a plurality of the air inlets 2.1 and the air outlets 2.2 are arranged along the circumference of the outer side of the outer cover 2, and the number of the air inlets 2.1 and the number of the air outlets 2.2 are both 6.

[0024] Please continue reading Figures 1 to 7 As shown, in one embodiment of the present invention, six first threaded holes 9.2 are evenly arranged along the circumference of the lower baffle plate 9.1 of the centrifugal fan 9. The first threaded holes 9.2 are used to install the slip ring support screw 3.

[0025] Please continue reading Figures 1 to 6 As shown, in one embodiment of the present invention, 24 second threaded holes 5.1 are evenly arranged along the circumference on the upper end surface of the upper collector ring 5. The second threaded holes 5.1 are used to install the guide vanes 4.

[0026] See also Figures 1 to 6 The present invention provides another embodiment: a method for operating a heat dissipation type collector ring device with an internal fan structure, comprising the following steps: Step S1, installing the heat dissipation type collector ring device on the hydro-generator set, starting the hydro-generator set, and the upper collector ring 5, the lower collector ring 7 and the centrifugal fan 9 rotate synchronously with the main shaft 1; Step S2: Airflow enters from the air inlet 2.1 on the outer cover 2 and is split into two paths by the guide vanes 4. One path flows into the inner side of the slip ring, and the other path flows through the outer side of the slip ring and the carbon brushes. Step S3: The two air flows converge inside the centrifugal fan 9 below the collector ring and are finally discharged from the air outlet 2.2 on the outer cover 2 under the centrifugal action of the centrifugal fan 9, taking away part of the heat while collecting the carbon powder on the dust removal felt.

[0027] The present invention has the following working principle: during the operation of the hydro-generator set, the upper and lower collector rings 7 with internal fan structures and the centrifugal fan 9 rotate synchronously with the main shaft 1. Under the joint action of the fan structure inside the collector ring, the centrifugal fan 9, the guide vanes 4 installed on the upper end face of the upper collector ring 5 and the insulating baffle 6, the air flow enters from the air inlet 2.1 on the outer cover 2, part of it flows into the inner side of the collector ring, and part flows through the outer side of the collector ring and the carbon brushes. These two parts of the air flow converge on the inner side of the fan blades of the centrifugal fan 9 below the collector ring, and are finally discharged from the air outlet 2.2 on the outer cover 2 under the centrifugal action of the centrifugal fan 9, while taking away part of the heat, the carbon powder is collected on the dust removal felt.

[0028] The above description is only a preferred embodiment of the present invention and should not be understood as limiting the present application. All equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A heat dissipation type collector ring device with an internal fan structure, characterized in that: The fan is connected to the main shaft by a key, and the upper and lower collector rings are connected by a collector ring support screw. One end of the collector ring support screw is matched with a nut to be fixed to the centrifugal fan. The upper collector ring is provided with a plurality of guide vanes, and the upper and lower collector rings are both provided with an internal fan structure. The upper end of the outer cover is provided with a plurality of air inlets, and the lower end of the outer cover is provided with a plurality of air outlets, and the air flow entering the air inlet is divided into two paths by the guide vanes, one path flows into the inner side of the collector ring, and the other path flows through the outer side of the collector ring. The two air flows converge at the centrifugal fan and are discharged from the air outlet. A dust collecting felt is installed in the air outlet.

2. The heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: The centrifugal fan includes a connecting shaft, an upper baffle plate, a lower baffle plate and centrifugal blades. The connecting shaft is fixedly connected to the lower baffle plate, the upper baffle plate is arranged above the lower baffle plate, and a plurality of centrifugal blades are arranged between the lower baffle plate and the upper baffle plate. One end of the collector ring support screw is connected and fixed to the lower baffle plate with a nut.

3. The heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: The collector ring supporting screw is sleeved in the insulating sleeve.

4. The heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: The internal fan structure includes a spiral groove and internal fan blades. The internal fan blades are arranged in the internal grooves of the upper collector ring and the lower collector ring. The outer ring surfaces of the upper collector ring and the lower collector ring are both provided with a spiral groove connected to the placement groove.

5. The heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: It also includes an insulating baffle, and the lower end surface of the upper collector ring and the upper end surface of the lower collector ring are respectively provided with an annular groove; the insulating baffle is connected to the upper and lower collector rings through the annular grooves on the upper and lower collector rings.

6. The heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: The plurality of air inlets and air outlets are arranged along the circumference of the outer side of the outer cover, and the number of the air inlets and air outlets is 6.

7. The heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: The lower baffle plate of the centrifugal fan blades has six first threaded holes evenly arranged along the circumferential direction.

8. The heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: Twenty-four second threaded holes are evenly arranged along the circumferential direction on the upper end surface of the upper collector ring.

9. A method for operating the heat dissipation slip ring device with an internal fan structure according to claim 1, characterized in that: The steps include: Step S1, installing the heat dissipation type collector ring device on the hydro-generator set, starting the hydro-generator set, and the upper collector ring, the lower collector ring, the internal fan structure and the centrifugal fan rotate synchronously with the main shaft; Step S2: The airflow enters from the air inlet on the outer cover and is split into two paths by the guide vanes, one path flowing into the inner side of the slip ring and the other path flowing through the outer side of the slip ring and the carbon brushes. Step S3: The two air flows converge on the inner side of the centrifugal fan below the collector ring, and are finally discharged from the air outlet on the outer cover under the centrifugal action of the centrifugal fan, while taking away part of the heat and collecting the carbon powder on the dust removal felt.

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