In-groove structure of armature assembly of permanent magnet brush direct current tachogenerator

Abstract

The utility model belongs to the technical field of aviation motor design, and relates to a permanent magnet brush direct current tachogenerator armature assembly in-groove structure, which comprises a binding wire (1), a groove insulator (2) and a coil (3). According to the utility model, on the basis of the existing armature assembly, the structure in the groove of the armature assembly is optimized in combination with product technical requirements and use environment requirements. The permanent magnet brush direct current tachogenerator is high in slot fullness rate, and in order to solve the problem that the slot fullness rate of the product is high, the high slot fullness rate of the motor enables the heat dissipation performance of the motor to become poor, the temperature rise of a coil becomes high, the aging of materials is accelerated, the coil is easy to damage after a slot wedge is extruded in a coil inserting process, and the damage is possibly aggravated by vibration and impact environments in a use process. And the motor is easy to break. After the structure in the groove is improved, extrusion in the groove is reduced, and the situation of wire breakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the aviation motor design technical field, specifically relates to a structure in the slot of permanent magnet brush DC tachogenerator armature assembly. BACKGROUND

[0002] The main structure of the permanent magnet brush DC tachogenerator is magnetic steel + armature + brush, by dragging the armature assembly, the coil of the armature assembly cuts the magnetic induction line generated by the magnetic steel and outputs electric energy, the electric energy is outputted through the commutating sheet under the action of the brush, and the corresponding speed is fed back through the value of the voltage.

[0003] The high slot fill factor of the permanent magnet brush DC tachogenerator armature assembly makes the heat dissipation performance of the motor poor, the coil temperature rises high, material aging is accelerated, the coil is prone to damage after being extruded by the slot wedge during the embedding process, the vibration and impact environment during use can aggravate the damage, the motor is more prone to the wire breakage problem, and finally the speed measurement and the dragging speed are inconsistent. SUMMARY

[0004] The purpose of the present application is:

[0005] In the vibration environment, the coil with high slot fill factor of the speed measuring machine can be affected by mechanical stress due to the vibration environment, leading to structural damage and performance degradation, affecting the operation of the speed measuring machine. By changing the structure in the slot of the tachogenerator, the influence of the environment on the coil wire breakage is reduced, and the product strength is improved.

[0006] In order to achieve the above purpose, the utility model discloses a structure of a permanent magnet brush DC tachogenerator, which comprises a wire binding 1, a slot insulation 2 and a coil 3. The slot insulation 2 completely wraps the coil 3 and is fixed by an adhesive. The slot insulation 2 near the slot is fixed by the wire binding 1, and the slot insulation 2 and the wire binding 1 are bonded by the adhesive.

[0007] The slot insulation 2 is made of 652 polyaramid fiber paper polyimide film composite single-sided adhesive foil insulation film material.

[0008] The thickness of the slot insulation 2 is more than 0.05mm.

[0009] The slot insulation 2 is divided into two parts, one part is padded on the slot bottom and the other part is attached to the slot opening. The two parts of the slot insulation completely wrap the coil.

[0010] The wire binding 1 is made of cotton thread or ramie thread or hollow cotton rope, and the wire diameter is 0.3mm-0.4mm.

[0011] The adhesive is made of acetal drying glue solution.

[0012] The beneficial effects of the present application are:

[0013] The structure of a permanent magnet brush DC speed measuring generator is provided, which is improved on the basis of the existing slot structure. Since the speed measuring generator belongs to a low speed and low voltage speed measuring generator, the slot wedge is cancelled, the plug-in mode of the slot insulation is changed, the slot insulation is fixed by using adhesive, the movement of the slot insulation is prevented, the slot insulation is fixed by using a binding wire, and the slot insulation and the binding wire are bonded by using adhesive, so that the product quality is improved, the production efficiency is improved, the condition of high slot filling rate is improved, and the probability of wire breakage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Slot structure diagram.

[0015] Wherein: 1 - binding wire, 2 - slot insulation, 3 - coil. DETAILED DESCRIPTION

[0016] The utility model will be explained in further detail as follows.

[0017] As Figure 1 shown, the structure of a permanent magnet brush DC speed measuring generator includes a binding wire 1, a slot insulation 2, and a coil 3. The slot insulation 2 completely wraps the coil 3 and is fixed by using adhesive. The slot insulation 2 near the slot opening is fixed by using the binding wire 1, and the slot insulation 2 and the binding wire 1 are bonded by using adhesive.

[0018] The slot insulation 2 is made of 652 polyaryl (sulfone) fiber paper polyimide film composite single-sided adhesive foil insulation film material.

[0019] The thickness of the slot insulation 2 is greater than 0.05 mm.

[0020] The slot insulation 2 is divided into two parts, one part is padded at the bottom of the slot, and the other part is attached to the slot opening. The two parts of the slot insulation completely wrap the coil, avoiding the contact between the coil and the iron core, and reducing the probability of coil damage.

[0021] The binding wire 1 presses the two ends of the slot insulation 2 near the slot opening. The binding wire 1 and the slot insulation 2 are bonded together by using adhesive, avoiding the structure damage and performance decline caused by the breakage of the binding wire, and affecting the operation of the speed measuring generator.

[0022] The binding wire 1 is made of cotton thread or ramie thread or hollow cotton rope, and the diameter is 0.3 mm to 0.4 mm.

[0023] The adhesive is selected from natural drying adhesive such as acetal, and strong adhesive is used.

[0024] Specific operation method: the slot insulation is divided into two parts, one part is padded in the slot bottom, and the other part is attached to the slot opening. The two parts of the slot insulation wrap the coil to avoid contact between the coil and the core, thereby insulating the coil from the core and reducing the probability of coil damage. The end of the slot insulation near the slot opening is pressed tightly by using a binding wire, and the binding wire and the slot insulation are adhered together by applying adhesive, thereby avoiding the breakage of the binding wire and the resulting structural damage and performance degradation, which affects the operation of the speed measuring machine.

[0025] This design improves product quality, improves production efficiency, reduces the influence of broken line caused by environment during the use of speed measuring machine, and reduces the probability of broken line caused by inserting slot wedge when the slot fullness is too high during production and processing.

Claims

1. A slot structure for a permanent magnet brush DC tachogenerator armature assembly, characterised in that: It comprises a binding line (1), a slot insulation (2) and a coil (3); the slot insulation (2) completely wraps the coil (3) and is fixed by an adhesive; the binding line (1) is used to fix the slot insulation (2) near the slot; and the adhesive is used to bond the slot insulation (2) and the binding line (1).

2. A permanent magnet brush DC tachometer generator armature assembly slot configuration according to claim 1 wherein: The slot insulation (2) is made of 652 polyarylate fiber paper polyimide film composite single-side adhesive foil insulation film material.

3. A permanent magnet brush DC tachometer generator armature assembly slot configuration according to claim 1 wherein: The thickness of the slot insulation (2) is greater than 0.05 mm.

4. A permanent magnet brush DC tachometer generator armature assembly slot arrangement according to claim 1 wherein: The slot insulation (2) is divided into two parts, one part is padded on the slot bottom and the other part is attached to the slot opening; the two parts of the slot insulation completely wrap the coil.

5. The slot structure of the armature assembly of a permanent magnet brushed DC tachogenerator according to claim 1, characterized in that: The binding line (1) is made of cotton or ramie or hollow cotton rope, and the diameter is 0.3-0.4 mm.

6. The slot structure of the armature assembly of a permanent magnet brushed DC tachogenerator according to claim 1, characterized in that: The adhesive is made of acetal drying glue solution.

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