Direct-current motor for steel rolling mill
By introducing a split-segment stator, a wind shield, and a special winding design into the DC motor, the problems of rapid temperature rise in harsh environments and low efficiency under high loads have been solved, resulting in more efficient and stable operation and reduced costs.
Patent Information
- Application Number
- CN202423247762.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing DC motors are prone to shortening their lifespan due to rapid temperature rise in harsh environments, posing safety hazards. They are also inefficient and costly under high loads.
The stator adopts a split-half structure and is equipped with a wind shield to guide cooling air into the stator. Eight main poles and commutation poles are evenly distributed on the stator, and each main pole has eight grooves. Combined with the characteristics of separately excited power supply and special winding pitch, the temperature rise and loss are reduced.
It improves cooling efficiency, reduces temperature rise and losses, extends motor life, enhances operational stability and efficiency, and reduces costs.
Smart Images
Figure CN223639036U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to steel drive equipment technical field, specifically, relate to a kind of direct current motor for rolling mill. BACKGROUND
[0002] Direct current motor is assembled on large rolling mill, for driving turntable, speed reducer and pump, can make rolling mill realize automatic cutting, blanking etc. movement, the series motor adopts half structure, compared with traditional circular base can better utilize space, armature uses self-excited power supply characteristic, can be used in the working condition that load changes greatly.
[0003] But existing direct current motor is restricted in some severe special environment application, such as in the well-ventilated environment is not good airtight space, long-term overload operation, the temperature rise of motor will sharply increase, motor loss increases simultaneously, while the speed of internal insulation material aging will greatly promote, which seriously threatens motor life, more increases the hidden danger of safety accident. Therefore, it is urgent to develop a new type of direct current motor that can meet the needs of high load and run safely under unfavorable cooling conditions. UTILITY MODEL CONTENT
[0004] The utility model aims at at least one of the technical problems existing in the prior art.
[0005] Therefore, one purpose of the utility model is to provide a direct current motor for rolling mill, which guides cooling air into the interior of the stator through the wind shield, improves the cooling efficiency and reduces the temperature rise, and the eight grooves on each main pole of the stator make the magnetic poles uniformly distributed, without circulating current and harmful wave-slot harmonics, reducing loss, saving cost and improving efficiency.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a direct current motor for rolling mill, comprising a stator and a front wind shield, a rear wind shield, an armature, a bearing seat and a commutator arranged at both ends of the stator, the stator is a half structure, and eight main poles and eight commutating poles are distributed at equal intervals on the circumference of the stator, eight grooves are arranged on each main pole, and a wind shield is installed at the bottom of the stator away from the lower end of the commutator.
[0007] Preferably, the air inlet of the wind shield is arched, and the air outlet is arranged towards the stator.
[0008] Preferably, an outgoing line sheath is installed at the bottom of the stator close to the lower end of the commutator, a conductive row is arranged on the outgoing line sheath, and a wire fixing clamp is arranged on the conductive row.
[0009] Preferably, the armature winding pitch is 1-16.
[0010] Preferably, the armature winding pitch is 1-15.
[0011] Preferably, a fastening bolt is arranged on the fixed wire clamp, and an end of the fastening bolt is provided with a nut.
[0012] Compared with the prior art, the utility model has the advantages that: in the utility model, the wind shield is located at the bottom of the stator far from the lower end of the commutator, can guide the cooling air into the stator, improve the cooling efficiency and reduce the temperature rise, the stator contains eight main poles and commutating poles, eight grooves are arranged on each main pole, the magnetic poles are uniformly distributed, there is no circulating current and harmful wave-slot harmonic, the loss is reduced, the cost is saved, and the efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structure schematic view of the direct current motor for rolling mill according to the embodiment of the utility model;
[0014] Figure 2 It is a sectional structure schematic view of the stator in the direct current motor for rolling mill according to the embodiment of the utility model;
[0015] Figure 3 It is a structure schematic view of the wind shield in the direct current motor for rolling mill according to the embodiment of the utility model.
[0016] In the drawing: 1, stator;2, front wind shield;3, rear wind shield;4, bearing seat;5, armature;6, commutator;7, fixed wire clamp;8, wind shield;9, wire outlet sheath;10, conductive row;11, fastening bolt;12, main pole;13, commutating pole;14, groove. DETAILED DESCRIPTION
[0017] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0018] Please refer to Figures 1-3 The embodiment of the utility model provides a direct current motor for rolling mill, which comprises: a stator 1, a front wind shield 2 and a rear wind shield 3.
[0019] In the embodiment, as Figure 1 shown, the front wind shield 2 and the rear wind shield 3 are installed at the two ends of the stator 1, the two ends of the stator 1 are also provided with an armature 5, a bearing seat 4 and a commutator 6, the bottom of the stator 1 and far from the lower end of the commutator 6 is provided with a wind shield 8, the air inlet of the wind shield 8 is arched, and the air outlet is arranged towards the stator 1.
[0020] The baffle 8, installed at the bottom of the stator 1 and away from the lower end of the commutator 6, guides the cooling air into the stator 1 through its arched opening during ventilation and cooling of the DC motor, preventing it from dissipating and effectively reducing temperature rise and improving cooling efficiency.
[0021] The stator 1 has a split structure, and eight main poles 12 and eight commutating poles 13 are distributed circumferentially on the stator 1. Each main pole 12 is provided with eight grooves 14. The stator 1 is equipped with eight main poles 12 and eight commutating poles 13, and each main pole 12 has eight grooves 14. This special number of grooves can make the magnetic poles evenly distributed on the winding, and the center line of the brush is aligned with the center line of the magnetic pole, so that the sum of the induced electromotive force is zero, there is no circulating current in the winding, and no harmful wave-slot harmonics can be formed, thereby reducing motor losses.
[0022] In this embodiment, as Figure 1 As shown, a lead-out sleeve 9 is installed at the bottom of the stator 1 and near the lower end of the commutator 6. A conductor bus 10 is provided on the lead-out sleeve 9. A wire clamp 7 is provided on the conductor bus 10. A fastening bolt 11 is provided on the wire clamp 7. A nut is provided at the end of the fastening bolt 11. The conductor bus 10 is led out from the stator 1 through the lead-out sleeve 9. The wire clamp 7 is fixed on the conductor bus 10. The wire clamp 7 uses the fastening bolt 11 and nut to fix the wire, so as to achieve electrical connection and stability.
[0023] like Figure 1 As shown, the armature 5 winding pitch is 1-16 or 1-15. The armature 5 winding has a special pitch of 1-15 and 1-16 and adopts separately excited power supply characteristics, which increases the life of the armature 5 coil. The winding is a waveform coil, which reduces electromagnetic noise and vibration, improves the stability and reliability of motor operation, increases power density and efficiency, reduces temperature rise and loss, and has low manufacturing cost.
[0024] Based on the above technical solution, the working steps of this solution are summarized as follows: During use, the windshield 8 at the bottom of the stator 1 and away from the lower end of the commutator 6 guides the cooling air into the interior of the stator 1 without dissipating, effectively reducing the temperature rise and improving the cooling efficiency. In addition, the stator 1 adopts a split structure, which can effectively reduce maintenance time, facilitate loading and unloading, and greatly improve maintenance efficiency. The stator 1 is equipped with eight main poles 12 and eight commutator poles 13, of which each main pole 12 has eight grooves 14. This special number of grooves can make the magnetic poles evenly distributed on the winding, with the center line of the brush aligned with the center line of the magnetic pole, so that the sum of the induced electromotive force is zero, there is no circulating current in the winding, and no harmful wave-slot harmonics can be formed, thereby reducing motor losses, saving costs, reducing labor time, and improving efficiency.
[0025] The parts not involved in the utility model are the same as the prior art or can be realized by using the prior art. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A direct current motor for a rolling mill, comprising a stator (1) and a front fan cover (2), a rear fan cover (3), an armature (5), a bearing seat (4) and a commutator (6) provided at both ends of said stator (1), characterized in that: The stator (1) is a half structure, eight main poles (12) and eight commutating poles (13) are distributed on the stator (1) at equal intervals, eight recesses (14) are arranged on each main pole (12), a wind shield (8) is arranged on the bottom of the stator (1) and away from the lower end of the commutator (6).
2. A DC motor for rolling mills according to claim 1, characterized in that: The air inlet of the wind shield (8) is arc-shaped, and the air outlet is arranged towards the stator (1).
3. A DC motor for rolling mills according to claim 1, characterized in that: A wire outlet sheath (9) is arranged on the bottom of the stator (1) and close to the lower end of the commutator (6), a conductive row (10) is arranged on the wire outlet sheath (9), and a wire fixing clamp (7) is arranged on the conductive row (10).
4. A DC motor for rolling mills according to claim 1, characterized in that: The winding pitch of the armature (5) is 1-16.
5. A DC motor for rolling mills according to claim 1, characterized in that: The winding pitch of the armature (5) is 1-15.
6. A DC motor for rolling mills according to claim 3, characterized in that: A fastening bolt (11) is arranged on the wire fixing clamp (7), and a nut is arranged on the end of the fastening bolt (11).