RU207331U1 - Device for drying the coils of the main poles of electric machines with infrared radiation - Google Patents

Abstract

The utility model relates to electrical engineering, in particular to the production and repair of electrical machines, for example, windings of traction electrical machines (TEM) of locomotives and motor-car rolling stock. the frame and core, suspended on the brackets of a drum rotating around its axis, is carried out in a sealed chamber due to oppositely located panels with infrared emitters, which ensures uniform two-sided heating and drying of the poles, while one group of panels is mounted on a fixed stand behind the poles, and the other in front of them on the doors opening vertically upward due to the block system. The scheme of the proposed device is shown in Fig. 1, 2 and 3; FIG. 1: 1 - drying chamber cover; 2 - reducer; 3 - engine; 4 - sidewalls of the drying chamber cover; 5 - drum; 6 - pole coil bracket; 7 - heating panels with IR emitters of the first group; 8 - a stand for mounting IR emitters; Fig. 2: 9 - pole coil; 10 - drying chamber doors; 11 - heating panels with IR emitters of the second group; 12 - racks; 13 - weight; 14 - rope; 15 - stationary unit. The device consists of a sealed drying chamber with thermal insulation, which in turn consists of a cover 1 and doors 10. Inside the drying chamber there is a rotating drum 5 with brackets 6 for resolving the poles. A stationary block 15 is located on the posts 12, through which a rope 14 is pulled with a weight in the form of a weight 13 from the outside, designed to open the doors 10 of the sealed drying chamber by lifting them vertically upwards. When the doors 10 are lifted, they in turn open the sidewalls 4 of the drying chamber cover 1. On the cover of the drying chamber 1 there is a motor 3 and a reducer 2. Under the cover there is a stand 8 for fixing heating panels with IR emitters of the first group 7. Heating panels with IR - emitters of the second group 11 are attached to the doors of the drying chamber 10 and move upward with the door when the drying chamber is opened. The device works as follows. Pole coils 9, after impregnation, with a beam crane or manually, are attached to brackets 6 in a suspended state, located on a drum 5. On the posts 12, force is transmitted by means of a rope 14 through a stationary drum 15 from a weight 13 and the doors 10 of the drying chamber are lowered. Next, lower the sidewalls of the cover 4 of the drying chamber. The motor 3 transmits the torque to the shaft 16 through the gearbox 2, which drives the drum 5 in rotary motion, on which the brackets 6 with suspended pole coils are located. Power is supplied to heating panels with IR emitters of the first 7 and second 11 groups. Thus, it turns out that the pole coils 9 rotate uniformly between two groups of heating panels (the first group 7 and the second group 11), which in turn create a counter thermal field , carrying out double-sided uniform heating of the insulation of the pole coils 9 to the required temperature, followed by drying, as shown in FIG. 2. After the end of the drying process, the sidewalls of the drying chamber cover 4 are raised and the doors 10 of the drying chamber are raised using a rope 14 to remove the pole coils, which is shown in FIG. 3. As a result of the use of a chamber-type device for drying the coils of the main poles, the drying speed increases due to the tightness of the drying process; productivity increases by reducing the time for replacing coils and increasing their total number, as well as increasing the reliability of the insulation of the main poles due to the opposite arrangement of IR emitters, which allows for uniform two-sided heating followed by drying.

Description

The useful model relates to electrical engineering, in particular to the production and repair of electrical machines, for example, windings of traction electrical machines (TEM) of locomotives and motor-car rolling stock.

A known method of drying the insulation of the windings of the magnetic system of the TEM frame in a specialized drying oven of the chamber type with forced air circulation [1].

The disadvantage of this method is that this drying technology is of low quality and very energy intensive with a long drying time. With an installed kiln power of 80 kW on average, the drying time takes from 10 to 15 hours.

A device is known for implementing an infrared-convective-low-vacuum method for drying the insulation of the windings of the magnetic system of the skeleton of a traction electric machine [2].

The disadvantage of this device is the high power of the rotation drive, due to the need to rotate the bed of an electric machine of large mass, as well as the lack of the possibility of drying with infrared radiation on the back side of the main poles.

A known method of drying the polymer insulation of the main poles of traction electric machines with their removal from the frame [3].

The disadvantage of this method is the possibility of simultaneous drying of a small number of main poles, irrational arrangement of infrared emitters, as well as the absence of a sealed chamber, which leads to heat loss.

The closest technical solution, chosen as a prototype, is a chamber-type device for drying the polymer insulation of the frame of traction electric machines with a rotating thermal field [4].

The disadvantage of this device is the lack of the possibility of drying with infrared radiation on the back side of the main poles, as well as a small drying volume due to the placement of only one skeleton in the chamber.

A device for drying the coils of the main poles of a chamber type, characterized in that the drying of the poles removed from the frame and core, suspended on the brackets of a drum rotating around its axis, is carried out in a sealed chamber due to opposite panels with infrared emitters, which ensures uniform two-sided heating and drying the poles, with one group of panels mounted on a fixed post behind the poles, and the other in front of them on doors that open vertically upward due to the block system.

The scheme of the proposed device is shown in Fig. 1, 2 and 3.

FIG. 1: 1 - drying chamber cover; 2 - reducer; 3 - engine; 4 - sidewalls of the drying chamber cover; 5 - drum; 6 - pole coil bracket; 7 - heating panels with IR emitters of the first group; 8 - a stand for mounting IR emitters.

FIG. 2: 9 - pole coil; 10 - drying chamber doors; 11 - heating panels with IR emitters of the second group; 12 - racks; 13 - weight; 14 - rope; 15 - fixed block.

The device consists of a sealed drying chamber with thermal insulation, which in turn consists of a cover 1 and doors 10. Inside the drying chamber there is a rotating drum 5 with brackets 6 for resolving the poles. A stationary block 15 is located on the posts 12, through which a rope 14 is pulled with a weight in the form of a weight 13 from the outside, designed to open the doors 10 of the sealed drying chamber by lifting them vertically upwards. When the doors 10 are lifted, they in turn open the sidewalls 4 of the drying chamber cover 1. On the cover of the drying chamber 1 there is a motor 3 and a reducer 2. Under the cover there is a stand 8 for fixing heating panels with IR emitters of the first group 7. Heating panels with IR - emitters of the second group 11 are attached to the doors of the drying chamber 10 and move upward together with the door when the drying chamber is opened.

The device works as follows. Pole coils 9, after impregnation, with a beam crane or manually, are attached to brackets 6 in a suspended state, located on a drum 5. On the posts 12, force is transmitted by means of a rope 14 through a stationary drum 15 from a weight 13 and the doors 10 of the drying chamber are lowered. Next, lower the sidewalls of the cover 4 of the drying chamber. The motor 3 transmits the torque to the shaft 16 through the gearbox 2, which drives the drum 5 in rotary motion, on which the brackets 6 with suspended pole coils are located. Power is supplied to heating panels with IR emitters of the first 7 and second 11 groups.

Thus, it turns out that the pole coils 9 rotate uniformly between two groups of heating panels (the first group 7 and the second group 11), which in turn create a counter thermal field, which carries out two-sided uniform heating of the insulation of the pole coils 9 to the required temperature, followed by drying, as shown in FIG. 2. After the end of the drying process, the sidewalls of the drying chamber cover 4 are raised and the doors 10 of the drying chamber are raised using a rope 14 to remove the pole coils, which is shown in FIG. 3.

As a result of the use of a device for drying the coils of the main poles of the chamber type, the drying speed increases due to the tightness of the drying process; productivity increases by reducing the time for replacing coils and increasing their total number, as well as increasing the reliability of the insulation of the main poles due to the opposite arrangement of IR emitters, which allows for uniform two-sided heating followed by drying.

Sourse of information

1. Frenkel E.B. Repair of electrical machines, electric rolling stock and diesel locomotives Text./E.B. Frenkel, V.G. Komolov, SI. Faib. Moscow: Transport, 1966 .-- 455 p.

2. Pat. 2569337 of the Russian Federation. IPC Н02К 15/12. Infrared-convective-vacuum method of drying the insulation of the windings of the magnetic system of the skeleton of a traction electric machine and a device for its implementation [Text] / A.M. Khudonogov, E.M. Lytkina, E.Yu. Dulsky, P. Yu. Ivanov, N.N. Garev, V.N. Vyzhimova; applicant and patentee of FGBOU VPO Irkutsk State Transport University. No. 2012145098/07; app. 10/23/2012; publ. 04/27/2014.

3. Pat. 2715996 of the Russian Federation. IPC Н02К 15/12. Method of drying polymer insulation of main poles of traction electric machines with their removal from the frame [Text] / E.Yu. Dulsky, P. Yu. Ivanov, A.M. Khudonogov, M.Yu. Khazheeva, I.O. Lobytsin, A.A. Khamnaev; applicant and patentee of the Federal State Budgetary Educational Institution of Higher Education "Irkutsk State Transport University". No. 2019117419; app. 06/04/2019; publ. 05.03.2019.

4. Application. 95387 of the Russian Federation. IPC Н02К 15/12. Chamber-type device for drying the polymer insulation of the frame of traction electric machines with a rotating thermal field [Text] / E.Yu. Dulsky, P. Yu. Ivanov, A.M. Khudonogov, A.S. Kovshin, A.A. Khamnaeva, I.O. Lobytsin, M.A. Divinets, N.I. Manuilov; applicant and patentee of the Federal State Budgetary Educational Institution of Higher Education "Irkutsk State Transport University". No.2020105800; app. 02/06/2020.

Claims (1)

A device for drying the coils of the main poles of a chamber type, characterized in that the drying of the poles removed from the frame and core, suspended on the brackets of a drum rotating around its axis, is carried out in a sealed chamber due to opposite panels with infrared emitters, which ensures uniform two-sided heating and drying the poles, with one group of panels mounted on a fixed post behind the poles, and the other in front of them on doors that open vertically upward due to the block system.

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