Explosion-proof motor
By adopting a flame-destroying loop structure composed of multiple sleeves in the explosion-proof motor, the problems of complex structure and inconvenient assembly in the prior art are solved, and the purpose of simplifying processing and improving the flame-destroying effect is achieved.
Patent Information
- Application Number
- CN202422373878.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The existing bending gap flame-extinguishing components of the existing explosion-proof motors have complex structures, high machining accuracy requirements and inconvenient assembly.
A flame-destroying circuit structure consisting of a plurality of first sets and second sets is adopted. A gap is formed between the first sets and the second sets. Energy loss and cooling is lost during propagation of the explosion flame. The number of sets can be adjusted to control the path length. The set and the bearing cover are an integral structure for easy processing and installation.
The processing and assembly process is simplified, the flame-destroying effect is improved, the processing accuracy requirements are reduced, and the installation convenience is enhanced.
Smart Images
Figure CN223297451U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a flameproof electric motor. Background Art
[0002] Explosion-proof motors are generally used in flammable and explosive environments. When a motor fails, sparks, arcs, dangerously high temperatures and other igniting materials may appear in the casing, causing the explosive gas mixture to explode. The explosion flame will spread outward through the penetration point between the rotating shaft and the end cover. A gap flame extinguishing component needs to be set between the rotating shaft and the end cover. The flame extinguishing gap usually adopts a curved path type, which increases the path for the explosion flame to pass within a certain space. The existing curved path gap flame extinguishing component is composed of multiple parts, and its structure is relatively complex. The parts processing precision is high and the assembly is inconvenient. Utility Model Content
[0003] In view of the above problems, the present invention proposes a flameproof motor, which can prevent the explosion flame from spreading outward through the penetration of the rotating shaft and the end cover. The gap flame extinguishing component of the explosion-proof motor is easy to process and assemble.
[0004] The technical solution of the present utility model is a flameproof motor, which includes a housing 11, a rotating shaft 1, end covers 5 are respectively connected to both ends of the housing, a bearing 4 is provided between the rotating shaft and the end cover, the outer side of the end cover is connected to the outer bearing cover 2, and the inner side of the end cover is connected to the inner bearing cover 6, which is characterized in that a plurality of first sleeves 7 extend from the end face of the inner bearing cover toward the rotor direction, the radial intervals between adjacent first sleeves are equal, a second sleeve 9 is inserted between the first sleeves, a gap is left between the first sleeve and the second sleeve, a gap is left between the head end of the second sleeve and the end face of the inner bearing cover, the root end of the second sleeve is connected to the disc 10, and the disc is fixedly sleeved on the rotating shaft 1.
[0005] The gap between the first and second bodies forms a flame extinguishing circuit. When the explosion flame propagates outward, the flame extinguishing circuit can cause the energy of the explosion flame to be lost. The low temperature in the gap between the first and second bodies can play a role in cooling and extinguishing the flame. The more first and second bodies there are, the longer the path of the flame extinguishing circuit is, and the better the cooling and flame extinguishing effect is.
[0006] The beneficial effects of the present invention are that the first sleeve body can be formed by processing an annular groove on the end face of the inner bearing cover, and the second sleeve body can be formed by processing an annular groove on the end face of the disc, which is convenient to process. At the same time, by reducing the radial spacing between the sleeve bodies and the wall thickness of the sleeve bodies, the number of sleeve bodies can be easily increased. The first sleeve body and the inner bearing cover are an integral whole, and the second sleeve body and the disc are an integral whole, which is convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a structural schematic diagram of the present invention.
[0008] Figure 2 for Figure 1 Magnified view of section C.
[0009] The accompanying drawings are marked as follows: 1-rotating shaft, 2-outer bearing cover, 3-screw, 4-bearing, 5-end cover, 6-inner bearing cover, 7-first sleeve, 8-limiting sleeve, 9-second sleeve, 10-disc, 11-housing, 12-stator, 13-rotor. DETAILED DESCRIPTION
[0010] A flameproof motor comprises a housing 11, a stator 12 being fixedly connected to the inner wall of the housing, a rotor 13 being inserted in the inner circle of the stator, a rotating shaft 1 being fixedly inserted in the rotor, end covers 5 being connected to both ends of the housing, a bearing 4 being provided between the rotating shaft and the end covers, an outer bearing cover 2 being connected to the outer side of the end cover, an inner bearing cover 6 being connected to the inner side of the end cover, a screw 3 passing through the outer bearing cover and the end cover and being screwed onto the inner bearing cover, the inner bearing cover being in contact with the outer ring end face of the bearing, the inner bearing cover being in contact with the inner ring of the bearing, the inner wall of the inner bearing cover being close to the rotating shaft, a plurality of first sleeves 7 extending from the end face of the inner bearing cover towards the rotor, the radial spacing between adjacent first sleeves being equal, a second sleeve 9 being inserted between the first sleeves, a gap being left between the first sleeve and the second sleeve, a gap being left between the head end of the second sleeve and the end face of the inner bearing cover, the root end of the second sleeve being connected to the disc 10, a gap being left between the head end of the first sleeve and the disc, and the disc being fixedly sleeved on the rotating shaft 1.
[0011] The number of the first sleeves is two or three, and the number of the second sleeves is equal to that of the first sleeves. The second sleeve with the smallest inner diameter is sleeved on the rotating shaft, and a limiting sleeve 8 is also sleeved on the rotating shaft. One end of the limiting sleeve 8 is in contact with the end face of the inner ring of the bearing, and the other end of the limiting sleeve 8 is in contact with the head end of the second sleeve with the smallest inner diameter.
[0012] The outer diameter of the limiting sleeve is equal to the outer diameter of the second sleeve body with the smallest outer diameter. The function of the limiting sleeve is to prevent axial movement of the rotating shaft and to avoid contact between the head of the second sleeve body and the end face of the inner bearing cover or the head end of the first sleeve body and the end face of the disc.
[0013] The first sleeve is formed by turning a plurality of annular grooves on the end surface of the inner bearing cover. If there are three first sleeves, there are two annular grooves. The second sleeve is formed in the same manner as the first sleeve.
[0014] The assembly steps are: 1. Place the second sleeve on the assembly section 14 of the rotating shaft and abut it against the end face of the large-diameter section on the left side of the rotating shaft assembly section; 2. Place the limit sleeve on the assembly section of the rotating shaft and abut it against the head end of the second sleeve; 3. Press the bearing into the bearing chamber of the end cover; 4. Connect the outer bearing cover and the inner bearing cover to the end cover; 5. Press the bearing onto the assembly section of the rotating shaft; 6. Connect the end cover to the housing.
Claims
1. A flameproof motor comprising a housing (11), a rotating shaft (1), end covers (5) connected to both ends of the housing, a bearing (4) provided between the rotating shaft and the end cover, an outer bearing cover (2) connected to the outer side of the end cover, and an inner bearing cover (6) connected to the inner side of the end cover, wherein: A plurality of first sleeves (7) extend from the end surface of the inner bearing cover toward the rotor, with radial intervals between adjacent first sleeves being equal, and second sleeves (9) being inserted between the first sleeves, with a gap between the first sleeves and the second sleeves, a gap between the head end of the second sleeve and the end surface of the inner bearing cover, and a root end of the second sleeve connected to a disc (10), which is fixedly sleeved on the rotating shaft (1).
2. The flameproof motor according to claim 1, wherein: The number of the first sleeves is three, the number of the second sleeves is equal to the number of the first sleeves, and the second sleeve with the smallest inner diameter is sleeved on the rotating shaft.
3. The flameproof motor according to claim 2, wherein: A limiting sleeve (8) is sleeved on the rotating shaft, one end of the limiting sleeve is in contact with the end face of the inner ring of the bearing, and the other end of the limiting sleeve is in contact with the head end of the second sleeve body with the smallest inner diameter.