Air cooling device of speed reducer

Abstract

The utility model relates to the technical field of speed reducer cooling, in particular to a speed reducer air cooling device which comprises a fan, an airflow guide part, a flow equalizing and diffusing part and a spiral guide part, the fan is used for generating airflow to act on a speed reducer shell, and the airflow guide part is in a hollow shape with two open ends and is arranged on the outer side of the speed reducer shell in a sleeving mode. One end of the air flow guide part is opposite to the output end of the fan, and the flow equalizing and diffusing part is arranged at the input end of the air flow guide part and used for dispersing concentrated air flow and evenly distributing the concentrated air flow to the cross section of the air flow guide part. And under the matching action of the flow equalizing diffusion piece and the spiral guide piece, the airflow flows out of the air outlet of the air duct more uniformly and better fits the outline of a shell of the speed reducer, so that the surface of the speed reducer is covered by the airflow more comprehensively and uniformly.

Description

A speed reducer air-cooling device Technical Field

[0001] This utility model relates to the field of speed reducer cooling technology, and in particular to a speed reducer air-cooling device. Background Technology

[0002] When a speed reducer is running, its internal components such as gears and bearings generate heat due to friction. If the temperature is too high, the viscosity of the lubricating oil will decrease, reducing its lubrication performance and preventing the formation of a good oil film on the surface of the components. This will accelerate the wear of the components and shorten the service life of the speed reducer.

[0003] Currently, the common cooling method for speed reducers is to use airflow generated by a fan to directly act on the speed reducer housing to remove heat. However, since the fan is located on one side of the speed reducer, the airflow is difficult to evenly cover the entire surface of the speed reducer. Moreover, the airflow blown out by the fan is in a divergent state, and a large amount of airflow cannot accurately act on the surface of the speed reducer, resulting in extremely low airflow utilization. A large amount of cooling airflow is lost in the ineffective space, which cannot effectively remove the heat generated by the operation of the speed reducer, resulting in low cooling effect. Summary of the Invention

[0004] This invention provides a speed reducer air-cooling device to solve the problem in the prior art that the airflow cannot fully act on the surface of the speed reducer, resulting in poor cooling effect of the speed reducer.

[0005] The technical problem solved by this utility model is achieved by the following technical solution:

[0006] A speed reducer air-cooling device includes a fan, an airflow guide, a flow equalization diffuser, and a spiral guide. The fan generates airflow that acts on the speed reducer housing. The airflow guide is hollow with open ends and is sleeved on the outside of the speed reducer housing. One end of the airflow guide is opposite to the output end of the fan. The flow equalization diffuser is located at the input end of the airflow guide and is used to discretize the concentrated airflow and distribute it evenly across the cross-section of the airflow guide. The spiral guide is located on the inner wall of the airflow guide and is configured to make the discretized airflow form a spiral flow pattern, with the spiral trajectory covering the outer surface of the speed reducer.

[0007] Preferably, a heat exchange unit for pre-cooling the airflow entering the airflow guide is provided between the fan and the input end of the airflow guide. The heat exchange unit includes a container holding a cooling medium and a refrigeration pipe connected to the container. The container is provided with a refrigerator for cooling the cooling medium, and the refrigeration pipe is provided with a pump body for circulating the cooling medium between the container and the refrigeration pipe.

[0008] Preferably, it also includes a controller electrically connected to the pump body, wherein a temperature sensor is provided inside the airflow guide, and the controller is used to control the opening and closing of the pump body after receiving the signal from the temperature sensor.

[0009] Preferably, there are multiple temperature sensors, and these multiple temperature sensors are distributed at different locations on the reducer to form a multi-point temperature sensor array.

[0010] Preferably, the cooling pipe is a serpentine coil and is made of a metal material with good thermal conductivity.

[0011] Preferably, the flow equalization diffuser is provided with multiple flow diversion holes, and the total area of ​​the multiple flow diversion holes is greater than the area of ​​the fan outlet.

[0012] The beneficial effects of this utility model are: by using the airflow guide component to effectively constrain the airflow blown out by the fan, the ineffective loss of cooling airflow is avoided, and the airflow utilization rate is significantly improved. Furthermore, through the combined action of the flow equalization diffuser and the spiral guide component, the airflow flows out from the air outlet of the fan duct more evenly, better conforming to the outer contour of the reducer housing, thereby achieving a more comprehensive and uniform coverage of the reducer surface, improving the heat dissipation effect and eliminating heat dissipation blind spots. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 is a schematic diagram of the isometric structure provided by this utility model;

[0015] Figure 2 is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 is an exploded structural diagram of the present invention;

[0017] Figure 4 is a schematic diagram of the heat exchange unit in this utility model.

[0018] In the diagram, 1 is the fan; 2 is the gearbox housing; 3 is the airflow guide; 4 is the flow equalization diffuser; 41 is the flow divider; 5 is the spiral guide; 6 is the heat exchange unit; 61 is the mounting component; 62 is the refrigeration pipe; 63 is the refrigerator; 64 is the pump body; 7 is the controller; and 71 is the temperature sensor. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0020] Referring to Figures 1-4, a speed reducer air-cooling device includes a fan 1 for generating airflow that acts on a speed reducer housing 2. An airflow guide 3, hollow with open ends, is provided on the opposite side of the output end of the fan 1 and fitted onto the outside of the speed reducer housing 2. The speed reducer housing 2 can be installed inside the airflow guide 3 via a bracket or the like, with the output end located outside the airflow guide 3. When the fan 1 blows air, the airflow is guided to the outside of the speed reducer housing 2 through the airflow guide 3, constraining the airflow generated by the fan 1, reducing the overflow of airflow generated by the fan 1, and carrying away heat from the surface of the speed reducer housing 2 for heat dissipation. Furthermore, a flow equalization diffuser 4 is provided at the input end of the airflow guide 3 for discretizing and evenly distributing the concentrated airflow across the cross-section of the airflow guide 3. The flow equalization diffuser 4 has multiple flow-dividing holes 41. The cross-section of the flow equalization diffuser 4 is similar to that of the airflow guide 3. With the same cross-section, when the concentrated airflow blown by the fan 1 reaches the flow equalization diffuser 4, the airflow is divided into multiple fine airflows due to the presence of the diversion holes 41. The velocity and pressure distribution of the high-speed concentrated airflow blown by the fan 1 changes as it passes through the diversion holes 41, achieving discretization of the concentrated airflow. Guided by the flow equalization diffuser 4, the discretized fine airflows are evenly distributed on the cross-section of the airflow guide 3. Furthermore, the total area of ​​the multiple diversion holes 41 is larger than the area of ​​the fan 1 outlet. This larger total area of ​​the diversion holes 41 allows for more channels and space for the concentrated airflow to disperse as it passes through the flow equalization diffuser 4, thus more effectively distributing the airflow evenly across the cross-section of the airflow guide 3. When the airflow exits from the smaller area of ​​the fan 1 outlet and enters the larger area of ​​the diversion holes 41 in the flow equalization diffuser 4, the airflow velocity decreases. This lower airflow velocity helps reduce airflow turbulence and noise, resulting in a smoother airflow, which is beneficial for subsequent airflow control and utilization.

[0021] Meanwhile, in order to make the airflow more comprehensively cover the outer wall of the reducer housing 2, a spiral guide 5 is also provided on the inner wall of the airflow guide 3. The spiral guide 5 is configured to make the discretized airflow form a spiral flow pattern, covering the outer surface of the reducer with a spiral trajectory. When the discretized airflow enters the guide through the flow equalization diffuser 4, the spiral guide 5 forces the airflow to flow along the spiral trajectory, forming a spiral flow with a tangential velocity component. The centrifugal force generated by the spiral flow makes the airflow flow closely against the outer wall of the reducer housing 2, and more efficiently removes the heat from its surface.

[0022] Referring to Figure 4, further, a heat exchange unit 6 is provided between the fan 1 and the input end of the airflow guide 3 for pre-cooling the airflow entering the airflow guide 3. The heat exchange unit 6 includes a support 61 containing a cooling medium and a refrigeration pipe 62 connected to the support 61. The refrigeration pipe 62 is a serpentine coil to increase the contact area with the airflow, and is made of a metal material with good thermal conductivity for better heat exchange. Preferably, a coolant is used as the cooling medium. The support 61 is provided with a device for pre-cooling the cooling medium. The cooling unit 63 can be a thermoelectric cooler based on the Peltier effect. The cooling pipe 62 is equipped with a pump body 64 for circulating the cooling medium between the mounting component 61 and the cooling pipe 62. The coolant is cooled by the cooler 63, and then the cooling medium is circulated by the pump body 64. When the airflow blown out by the fan 1 passes through the cooling pipe, the airflow is cooled, so that the temperature of the airflow entering the airflow guide component 3 is lower, thereby improving the air cooling effect of the reducer.

[0023] The system also includes a controller 7 electrically connected to the pump body 64. The airflow guide 3 is equipped with a temperature sensor 71. The controller 7 receives the signal from the temperature sensor 71 and controls the opening and closing of the pump body 64. When the temperature sensor 71 detects that the temperature inside the airflow guide 3 exceeds the set threshold, it indicates that the natural airflow through the fan 1 cannot meet the heat dissipation of the reducer. At this time, the controller 7 controls the pump body 64 to drive the coolant to circulate in the cooling pipe, so that the airflow temperature is lower and the heat dissipation effect is improved. At the same time, the pump body 64 is prevented from running continuously, reducing unnecessary energy consumption and effectively saving energy.

[0024] Referring to Figure 2, furthermore, there are multiple temperature sensors 71, which are distributed at different locations on the reducer to form a multi-point temperature sensor array 71. The heating characteristics of different parts of the reducer are significantly different. For example, the gear meshing area generates concentrated heat due to friction, the bearing position generates heat due to mechanical losses caused by high-speed rotation, and there are also different degrees of thermal effects in areas such as the motor junction box. By arranging temperature sensors 71 at key locations such as the bearing housing, gearbox center, journal, and motor winding end, the temperature data of each part can be accurately obtained, and the heat of the reducer can be more accurately monitored to see if it is within the preset threshold.

Claims

1. A speed reducer air-cooling device, characterized in that, Includes: a fan (1), which generates airflow that acts on the reducer housing (2); an airflow guide (3), which is hollow with open ends and sleeved on the outside of the reducer housing (2), with one end of the airflow guide (3) opposite to the output end of the fan (1); a flow equalization diffuser (4), which is located at the input end of the airflow guide (3) and is used to discretize the concentrated airflow and distribute it evenly to the cross-section of the airflow guide (3); and a spiral guide (5), which is located on the inner wall of the airflow guide (3) and is configured to make the discretized airflow form a spiral flow pattern, with the spiral trajectory covering the outer surface of the reducer.

2. The air-cooled device for a speed reducer according to claim 1, characterized in that, A heat exchange unit (6) for pre-cooling the airflow entering the airflow guide (3) is provided between the fan (1) and the input end of the airflow guide (3). The heat exchange unit (6) includes a container (61) containing a cooling medium and a refrigeration pipe (62) connected to the container (61). A refrigerator (63) for cooling the cooling medium is provided on the container (61). A pump body (64) for circulating the cooling medium between the container (61) and the refrigeration pipe (62) is provided on the refrigeration pipe (62).

3. The air-cooled device for a speed reducer according to claim 2, characterized in that, It also includes a controller (7) electrically connected to the pump body (64), and the airflow guide (3) is provided with a temperature sensor (71). The controller (7) is used to control the opening and closing of the pump body (64) after receiving the signal from the temperature sensor (71).

4. The air-cooled device for a speed reducer according to claim 3, characterized in that, The number of temperature sensors (71) is multiple, and the multiple temperature sensors (71) are distributed at different positions of the reducer to form a multi-point temperature sensor (71) array.

5. A speed reducer air-cooling device according to claim 2, characterized in that, The refrigeration pipe (62) is a serpentine coil and is made of a metal material with good thermal conductivity.

6. The air-cooled device for a speed reducer according to claim 1, characterized in that, The flow equalization diffuser (4) is provided with multiple flow diversion holes (41), and the total area of ​​the multiple flow diversion holes (41) is greater than the area of ​​the air outlet of the fan (1).

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