Oil-cooled motor casing
By using oil-cooled motor housing with casting materials, the gap-fitting runner cavity and step-type connection structure, the problem of welding in the prior art is not easy to ensure airtightness and the runner is prone to welding slag, achieving higher airtightness and lower cost.
Patent Information
- Application Number
- CN202421477847.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-06-26
AI Technical Summary
It is difficult to ensure airtightness during welding of existing oil-cooled motor housings, and the runners are prone to welding slag, which may cause damage to the air compressor head.
The outer tube and inner core of casting materials are used, and a flow channel cavity with a gap-fitting relationship is formed between the inner core and the outer tube. The oil nozzle is connected to the flow channel cavity. The ends of the inner core and the outer tube form a step-type connection structure and are welded and sealed to reduce welding points and avoid welding slag.
It improves the airtightness of the case, reduces uncertainty at the welding point, avoids deformation of the oil nozzle, reduces the temperature rise and vibration of the motor, and has a lower cost than the former.
Smart Images
Figure CN222763704U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a motor casing, in particular to an oil-cooled motor casing. Background Art
[0002] The existing oil-cooled motor housing is welded from several seamless steel pipes with a center height of more than 200, and the material is Q235. Figure 1-2 As shown, it includes an outer tube 1, an inner core 2, an end ring 3, an oil nozzle 4 and a base 5. The inner core 2 of the casing needs to be welded with a flow channel rib 2-1 ( Figure 2 , Figure 3 As shown in the figure, the welding position of the flow channel rib 2-1 is not easy to ensure, and then an end ring 3 is welded at one end of the inner core 2, and the welded parts are pressed into the outer tube 1 so that the flow channel rib contacts the inner wall of the outer tube, and then an end ring 3 is welded at the other end. The basic structure of the casing is completed, and then the processed inlet and outlet nozzles 4 are welded to the outer tube of the casing. The high temperature of welding will deform the nozzles, and then the foot 5 is welded to the outer tube of the casing. The welding may crack due to the vibration of the motor, and finally fine processing is performed. This casing has many welding places, and it is not easy to ensure air tightness. In addition, welding slag is easy to appear in the flow channel of the casing. If it is not cleaned up, it will cause damage to the air compressor head. Utility Model Content
[0003] The utility model aims to overcome the deficiencies in the prior art and provide an oil-cooled motor casing.
[0004] The purpose of the utility model is achieved through the following technical solutions: An oil-cooled motor housing, comprising an outer tube and an inner core, the inner core is inserted into the outer tube, the outer surface of the inner core is provided with inner core flow channel ribs, the inner wall of the outer tube is provided with outer tube flow channel ribs, the inner core flow channel ribs and the outer tube flow channel ribs are clearance-matched and a flow channel cavity is formed between the outer tube and the inner core, two oil nozzles are provided on the outer tube and are connected to the flow channel cavity, and the end of the inner core and the end of the outer tube form a stepped connection structure and are welded and sealed.
[0005] Furthermore, the outer tube and the inner core are castings, the oil nozzle, the foot and the outer tube are an integrally formed structure, one side end of the inner core forms a structure having a step A and cooperating with the outer tube, and one side end of the outer tube forms a structure having a step B and cooperating with the inner core; when the inner core is pressed into the outer tube, it is welded and sealed at steps A and B.
[0006] Furthermore, after the outer tube and the inner core are welded and sealed at the step A and the step B, an oil nozzle hole is opened at the oil nozzle of the outer tube, and the oil nozzle hole is communicated with the flow channel cavity.
[0007] The beneficial effects of the utility model are as follows: the utility model divides the casing into two parts, which are spliced and welded together, eliminating the end ring component and having only two welding points, thereby improving the air tightness and avoiding the appearance of welding slag inside the casing flow channel; the casing is a casting, which greatly reduces the cost compared to seamless steel pipes; the base is cast in one piece, which improves the strength of the casing; the oil nozzle is cast in one piece, and the oil nozzle hole is processed after welding to avoid deformation of the oil nozzle caused by high welding temperature; the heat dissipation effect of the casting material is better than that of steel, which can reduce the temperature rise of the motor, and the shock absorption of the casting is better than that of steel, which can reduce the vibration of the motor during operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 It is a schematic diagram of the main structure of the prior art.
[0009] Figure 2 It is a cross-sectional schematic diagram of the prior art.
[0010] Figure 3 It is a schematic diagram of the inner core structure of the prior art.
[0011] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.
[0012] Figure 5 It is a cross-sectional schematic diagram of the utility model.
[0013] Figure 6 It is a schematic diagram of the main structure of the utility model.
[0014] Figure 7 It is a schematic diagram of the inner core structure of the utility model.
[0015] Figure 8 It is a schematic cross-sectional view of the inner core of the utility model.
[0016] Fig. 9 It is a schematic diagram of the three-dimensional structure of the outer tube of the utility model.
[0017] Fig.10 It is a schematic diagram of the cross-sectional structure of the outer tube of the utility model.
[0018] Explanation of the reference numerals: outer tube 1, inner core 2, flow channel rib 2-1, end ring 3, oil nozzle 4, oil nozzle hole 4-1, foot 5, inner core flow channel rib 6, step A7, outer tube flow channel rib 8, step B9. DETAILED DESCRIPTION
[0019] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.
[0020] like Figure 4-Figure 10As shown, an oil-cooled motor casing comprises an outer tube 1 and an inner core 2, the outer tube 1 and the inner core 2 are castings, the oil nozzle 4, the foot 5 are casted integrally with the outer tube 1, the flow channel is casted integrally with the outer tube 1 and the inner core 2 respectively, the foot is cast integrally with the casing, the strength of the casing is increased, and the weld cracking at the foot due to motor vibration will not occur, and the material is HT250, and the heat dissipation effect is better than Q235. The inner core 2 is inserted into the outer tube 1, the outer surface of the inner core 2 is provided with an inner core flow channel rib 6, the inner wall of the outer tube 1 is provided with an outer tube flow channel rib 8, the inner core flow channel rib 6 and the outer tube flow channel rib 8 are gap-fitted and a flow channel cavity is formed between the outer tube 1 and the inner core 2, and two oil nozzles 4 are provided on the outer tube 1 and are connected to the flow channel cavity. A clearance fit is adopted between the inner core flow channel rib 6 and the outer tube flow channel rib 8 to reduce the difficulty of pressing the inner core of the casing into the outer tube. Since the flow channel and the casing are cast as one body, no welding slag will come out of the flow channel.
[0021] The end of the inner core 2 and the end of the outer tube 1 form a stepped connection structure and are welded and sealed. Specifically, one end of the inner core 2 forms a structure having a step A7 and matching with the outer tube 1, and one end of the outer tube 1 forms a structure having a step B9 and matching with the inner core 2. After the inner core 2 is pressed into the outer tube 1, it is welded and sealed at the steps A7 and B9. Since there are only two welding points, the welding time is greatly reduced, the air tightness of the casing is improved, and welding slag is avoided inside the casing flow channel. After the outer tube 1 and the inner core 2 are welded and sealed at the steps A7 and B9, an oil nozzle hole 4-1 is opened at the oil nozzle 4 of the outer tube 1. The oil nozzle hole 4-1 is connected to the flow channel cavity. The oil nozzle is cast as one piece. Processing the oil nozzle hole after welding avoids deformation of the oil nozzle caused by high welding temperature.
[0022] It is understandable that, for those skilled in the art, any equivalent replacement or change to the technical solution and the concept of the utility model should fall within the protection scope of the claims attached to the utility model.
Claims
1. An oil-cooled motor housing, characterized in that: The invention comprises an outer tube (1) and an inner core (2), wherein the inner core (2) is inserted into the outer tube (1), an inner core flow channel rib (6) is provided on the outer surface of the inner core (2), an outer tube flow channel rib (8) is provided on the inner wall of the outer tube (1), a clearance fit is formed between the inner core flow channel rib (6) and the outer tube flow channel rib (8), and a flow channel cavity is formed between the outer tube (1) and the inner core (2), two oil nozzles (4) are provided on the outer tube (1) and are connected to the flow channel cavity, and the end of the inner core (2) and the end of the outer tube (1) form a stepped connection structure and are welded and sealed.
2. The oil-cooled motor housing according to claim 1, characterized in that: The outer tube (1) and the inner core (2) are castings; the oil nozzle (4), the foot (5) and the outer tube (1) are an integrally formed structure; one end of the inner core (2) is formed with a step A (7) and is matched with the outer tube (1); one end of the outer tube (1) is formed with a step B (9) and is matched with the inner core (2); when the inner core (2) is pressed into the outer tube (1), a welding seal is formed at the step A (7) and the step B (9).
3. The oil-cooled motor housing according to claim 2, characterized in that: After the outer tube (1) and the inner core (2) are welded and sealed at the step A (7) and the step B (9), an oil nozzle hole (4-1) is opened at the oil nozzle (4) of the outer tube (1), and the oil nozzle hole (4-1) is connected to the flow channel cavity.