Air suction end cover structure of screw compressor
By setting a deflector structure on the suction end cover of the screw compressor, forced flow-guided cooling of the motor exhaust winding is achieved, which solves the problem of poor motor cooling effect, extends the service life of the motor and expands the operating range of the compressor.
Patent Information
- Application Number
- CN202422447032.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-09
AI Technical Summary
The motor cooling effect in the screw compressor is poor, especially under extreme operating conditions, the exhaust windings that are far away from the intake port cause severe heat, which can easily cause the motor to burn.
The suction end cap structure of the screw compressor is added to form an air flow channel, so that the gas is blown directly to the motor exhaust winding for forced flow cooling, and the gas direction is slowly changed through the first and second stages of the deflectors, reducing pressure losses and improving heat exchange efficiency.
Effectively avoid the burning of the motor, extend the service life of the motor, and expand the operating range of the screw compressor.
Smart Images
Figure CN223282227U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an end cover, in particular to an air suction end cover structure of a screw compressor. Background Art
[0002] Screw compressors have the characteristics of smooth operation, strong impact resistance, low vibration and noise, and few wearing parts. They are widely used in compressing gases such as refrigerants and air. Twin-screw compressors consist of a pair of yin and yang rotors assembled in parallel in the shell. Generally, the main driving side is the yang rotor and the driven side is the yin rotor. The yang rotor drives the yin rotor to rotate, realizing the suction, compression, and exhaust processes.
[0003] The screw compressor motor is installed inside the suction end, and the motor is cooled by the low-temperature gas sucked in. During the cooling process, the temperature of the gas gradually rises, causing the temperature of the motor to be higher at one end and lower at the other end. The cooling effect of the motor is poor, especially when the screw compressor is running to the limit working condition. Due to the increase in motor heat, the exhaust winding of the motor away from the suction port becomes seriously heated, and the motor may burn out. Utility Model Content
[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present invention proposes a screw compressor suction end cover structure.
[0005] The technical solution adopted by the utility model to solve the technical problem is: a screw compressor suction end cover structure, including a suction end cover body, one end of the suction end cover body is provided with a suction port, and the other end is provided with an air outlet, the suction end cover body is sleeved on the outer ring of the motor, and a gap is left between the inner wall of the suction end cover body and the outer wall of the motor to form an exhaust channel, the two ends of the motor are respectively provided with a motor suction winding and a motor exhaust winding, the motor suction winding is arranged in the suction end cover body, and the motor exhaust winding extends out of the suction end cover body;
[0006] An air intake port is provided on one end of the air intake end cover body close to the motor air intake winding, and a guide plate is provided on one end of the air outlet of the air intake end cover body close to the motor exhaust winding. The guide plate faces the motor exhaust winding, and one end of the guide plate is a connecting end and the other end is a free end. The connecting end is connected to the inner wall of the air intake end cover body;
[0007] An exhaust port is formed by leaving a gap between the guide plate and the motor exhaust winding, and the air intake port, the exhaust channel and the exhaust port are connected to form an airflow channel; and the gap between the free end of the guide plate and the motor exhaust winding is smaller than the gap between the connecting end of the guide plate and the motor exhaust winding.
[0008] In a preferred embodiment of the present invention, the guide plate includes a primary guide plate and a secondary guide plate, one end of the primary guide plate is connected to the inner wall of the intake end cover body, and an obtuse angle is formed between the primary guide plate and the inside of the intake end cover body, an obtuse angle is formed between the other end of the primary guide plate and one end of the secondary guide plate, and the other end of the secondary guide plate is a free end.
[0009] In a preferred embodiment of the present invention, the obtuse angle formed between the primary guide plate and the secondary guide plate faces the motor exhaust winding, and the obtuse angle formed between the primary guide plate and the inner wall of the suction end cover body faces the motor exhaust winding.
[0010] In a preferred embodiment of the present invention, the angle between the primary guide plate and the inner wall of the air intake end cover body is 140-170°, and the angle between the primary guide plate and the secondary guide plate is 140-170°.
[0011] In a preferred embodiment of the present invention, the air intake cover body and the guide plate are integrally formed.
[0012] The beneficial effect of the utility model is that the utility model finally achieves the goal of blowing gas to the exhaust winding of the motor by adding a guide plate structure on the suction end cover body, and forcibly guides and cools the exhaust winding of the motor through the guided gas, accelerates the heat exchange between the gas and the motor winding, thereby achieving the purpose of forced cooling, effectively avoiding the occurrence of motor burning, and extending the service life of the motor in the screw compressor. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure of the utility model;
[0014] Figure 2 This is a schematic diagram of the structure of the suction end cover of the utility model;
[0015] Figure 3 This is a schematic diagram of the structure of the guide plate of the utility model;
[0016] In the figure: the air intake cover body 1; the air intake port 2; the air outlet 3; the motor 4; the exhaust channel 5; the motor intake winding 6; the motor exhaust winding 7; the guide plate 8; the connecting end 8a; the free end 8b; the primary guide plate 801; the secondary guide plate 802; the exhaust port 9. DETAILED DESCRIPTION
[0017] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.
[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.
[0019] like Figures 1 to 3 The present invention shows a screw compressor suction end cover structure, comprising a suction end cover body 1, wherein the suction end cover body 1 is provided with an suction port 2 at one end and an air outlet 3 at the other end. The suction end cover body 1 is sleeved on the outer ring of a motor 4, and a gap is left between the inner wall of the suction end cover body 1 and the outer wall of the motor 4 to form an exhaust passage 5. The two ends of the motor 4 are respectively provided with a motor suction winding 6 and a motor exhaust winding 7. The motor suction winding 6 is arranged in the suction end cover body 1, and the motor exhaust winding 7 extends out of the suction end cover body 1.
[0020] An air intake port 2 is provided on one end of the air intake end cover body 1 close to the motor air intake winding, and a guide plate 8 is provided on one end of the air outlet 2 of the air intake end cover body 1 close to the motor exhaust winding 7. The guide plate 8 faces the motor exhaust winding 7, and one end of the guide plate 8 is a connecting end 8a and the other end is a free end 8b. The connecting end 8a is connected to the inner wall of the air intake end cover body 1;
[0021] A gap is left between the guide plate 8 and the motor exhaust winding 7 to form an exhaust port 9, and the air intake 2, the exhaust channel 5 and the exhaust port 9 are connected to form an airflow channel; and the gap between the free end of the guide plate 8 and the motor exhaust winding 7 is smaller than the gap between the connection end of the guide plate 8 and the motor exhaust winding, so that the gas moves toward the motor exhaust winding for forced diversion cooling.
[0022] When the screw compressor suction end cover structure of the present invention is in use, gas is sucked in from the suction port 2, and the gas enters the exhaust port 9 after passing through the exhaust channel 5. Since the guide plate 8 is facing the motor exhaust winding 7, when the gas enters the exhaust port 9 from the exhaust channel 5, the gas is blown toward the motor exhaust winding 7 through the guiding effect of the guide plate 8, thereby realizing forced diversion cooling of the motor exhaust winding by the gas, accelerating the heat exchange between the gas and the motor winding, and thus achieving the purpose of forced cooling.
[0023] As a preferred embodiment, the guide plate 8 in the present application includes a primary guide plate 801 and a secondary guide plate 802. One end of the primary guide plate 801 is connected to the inner wall of the air intake cover body 1, and an obtuse angle is formed between the primary guide plate 801 and the interior of the air intake cover body 1. An obtuse angle is formed between the other end of the primary guide plate 801 and one end of the secondary guide plate 802, and the other end of the secondary guide plate 802 is a free end 8b. The primary guide plate 801 and the secondary guide plate 802 in the present application are both guide structures, that is, the guide plates have a two-stage guide structure, which realizes a smooth change in gas direction, prevents the direction of the gas from changing drastically, reduces the problem of excessive pressure loss caused by excessively fast changes in gas direction, and thus ensures the normal and stable operation of the screw compressor.
[0024] As a preferred embodiment, the obtuse angle formed between the primary guide plate 801 and the secondary guide plate 802 in this application is oriented toward the motor exhaust winding, and the obtuse angle formed between the primary guide plate 801 and the inner wall of the air intake cover body 1 is oriented toward the motor exhaust winding. More preferably, the angle between the primary guide plate 801 and the inner wall of the air intake cover body 1 in this application is 140-170°, and the angle between the primary guide plate 801 and the secondary guide plate 802 is 140-170°. The two-stage flow guide structure on the air intake cover body 1 has the effect of gently changing the direction of the gas, preventing it from undergoing drastic changes in direction, and reducing the problem of excessive pressure loss caused by excessively rapid changes in direction. The primary flow guide changes the gas angle by 10-30°, and the secondary flow guide changes the gas angle by 30-60°, ultimately achieving the goal of blowing the gas toward the motor exhaust winding. The diverted gas is forced to cool the motor exhaust winding, accelerating heat exchange between the gas and the motor winding, thereby achieving the purpose of forced cooling.
[0025] The air intake cover body 1 and the guide plate 8 are integrally formed. More specifically, the guide plate 8 and the air intake cover body 1 are integrally cast, which can resist the impact of gas on the guide plate 8 without deformation. The guide plate 8 faces the motor exhaust winding 7, forcibly cooling the motor exhaust winding 7, reducing the heat generated by the motor exhaust winding, and expanding the operating range of the screw compressor.
[0026] The motor 4 of the screw compressor of the present invention is installed inside the suction end cover body 1 of the compressor, and the low-temperature gas sucked in through the suction port 2 cools the motor 4. During the cooling process, the temperature of the gas gradually increases, the temperature of the motor suction winding 6 close to the suction port 2 is low, and the temperature of the motor exhaust winding 7 far away from the suction port is high. Through the added guide plate 8 structure, the gas is finally blown to the motor exhaust winding 7, and the motor exhaust winding 7 is forced to be guided and cooled by the guided gas, which accelerates the heat exchange between the gas and the motor winding, thereby achieving the purpose of forced cooling, effectively avoiding the occurrence of motor burning, and extending the service life of the motor in the screw compressor.
[0027] Throughout this specification, references to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0028] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.
Claims
1. A screw compressor suction end cover structure, characterized in that: The motor comprises an air intake end cover body, wherein one end of the air intake end cover body is provided with an air intake port, and the other end is provided with an air outlet. The air intake end cover body is sleeved on the outer ring of the motor, and a gap is left between the inner wall of the air intake end cover body and the outer wall of the motor to form an exhaust channel. The two ends of the motor are respectively provided with a motor intake winding and a motor exhaust winding. The motor intake winding is arranged in the air intake end cover body, and the motor exhaust winding extends out of the air intake end cover body. An air intake port is provided on one end of the air intake end cover body close to the motor air intake winding, and a guide plate is provided on one end of the air outlet of the air intake end cover body close to the motor exhaust winding. The guide plate faces the motor exhaust winding, and one end of the guide plate is a connecting end and the other end is a free end. The connecting end is connected to the inner wall of the air intake end cover body; An exhaust port is formed by leaving a gap between the guide plate and the motor exhaust winding, and the air intake port, the exhaust channel and the exhaust port are connected to form an airflow channel; and the gap between the free end of the guide plate and the motor exhaust winding is smaller than the gap between the connecting end of the guide plate and the motor exhaust winding.
2. The screw compressor suction end cover structure according to claim 1, characterized in that: The guide plate includes a primary guide plate and a secondary guide plate. One end of the primary guide plate is connected to the inner wall of the air intake end cover body, and an obtuse angle is formed between the primary guide plate and the inside of the air intake end cover body. An obtuse angle is formed between the other end of the primary guide plate and one end of the secondary guide plate, and the other end of the secondary guide plate is a free end.
3. The screw compressor suction end cover structure according to claim 2, characterized in that: The obtuse angle formed between the primary guide plate and the secondary guide plate faces the exhaust winding of the motor, and the obtuse angle formed between the primary guide plate and the inner wall of the air intake end cover body faces the exhaust winding of the motor.
4. The screw compressor suction end cover structure according to claim 2, characterized in that: The included angle between the primary guide plate and the inner wall of the air intake end cover body is 140-170°, and the included angle between the primary guide plate and the secondary guide plate is 140-170°.
5. The screw compressor suction end cover structure according to any one of claims 1 to 4, characterized in that: The air intake end cover body and the guide plate are integrally formed.