A cooling tower motor

Abstract

This application relates to the technical field of motors dedicated to cooling towers, and in particular to a cooling tower motor, which includes a machine body and a rotating shaft rotatably connected within the machine body. A water collection tank is provided at the lower end of the machine body, and a pump body assembly is connected to the bottom of the water collection tank. A cooling liquid pipe is closely arranged on the outer wall of the machine body. The water collection tank, the pump body assembly, and the cooling liquid pipe are connected end to end to form a loop. The pump body assembly is intermittently connected to the rotating shaft. When the pump body assembly is connected to the rotating shaft, the liquid in the water collection tank is circulated in the loop for cooling. The present application has the following effects: When cooling is required at high temperatures, the pump body assembly is connected to the rotating shaft. Through the operation of the motor itself, power is transmitted into the pump body assembly, and the water source in the water collection tank is transported into the cooling liquid pipe to form a circulating loop, thereby taking away the heat and reducing the temperature of the motor.

Description

Technical Field

[0001] This application relates to the technical field of motors dedicated for cooling towers, and particularly to a cooling tower motor. Background Art

[0002] The circulating coolant of a cooling tower is water, which is a device that absorbs heat from the system and discharges it into the atmosphere to lower the water temperature. The cooling tower uses the heat exchange between water and air flow contact to generate steam, and the evaporation of the steam takes away heat to achieve the effects of evaporative heat dissipation, convective heat transfer, and radiative heat transfer, and dissipates the waste heat generated in industry or refrigeration and air conditioning.

[0003] Most of the designs of cooling tower fans adopt the design scheme of driving the fan with a motor. Generally, the operating environment is outdoors and for a long time. When the weather is hot, the operating environment temperature of the motor is too high, and there may be a risk of damage or shutdown. Summary of the Invention

[0004] In order to be able to dissipate heat from the motor at high temperatures, this application provides a cooling tower motor.

[0005] Provided by this application, the following technical solution is adopted: A cooling tower motor includes a body and a rotating shaft rotatably connected inside the body. A water collecting tank is provided at the lower end of the body. A pump body assembly is connected to the bottom of the water collecting tank. A cooling liquid pipe is closely arranged on the outer wall of the body. The water collecting tank, the pump body assembly, and the cooling liquid pipe are connected end to end to form a loop. The pump body assembly is intermittently connected to the rotating shaft. When the pump body assembly is connected to the rotating shaft, the liquid in the water collecting tank is circulated in the loop for cooling.

[0006] By adopting the above technical solution, the rainwater during outdoor rainfall is collected into the water collecting tank, or water is regularly supplemented into the water collecting tank. When it is necessary to cool down at high temperatures, the pump body assembly is connected to the rotating shaft. Through the operation of the motor itself, power is transmitted into the pump body assembly, and the water source in the water collecting tank is transported into the cooling liquid pipe to form a circulating loop, thereby taking away the heat and reducing the temperature of the motor.

[0007] Preferably, the pump body assembly includes a stepped first shaft connected to the lower end of the rotating shaft, a stepped second shaft rotatably connected to the water collecting tank, a linkage belt drivingly connected to the stepped first shaft and the stepped second shaft at both ends, and pump blades circumferentially and fixedly arranged on the stepped second shaft and located inside the water collecting tank. The stepped first shaft and the stepped second shaft are both parallel to the rotating shaft. The stepped second shaft is slidably connected to the water collecting tank along the length direction for adjusting the transmission ratio from the rotating shaft to the pump blades.

[0008] By adopting the above technical solution, in the case of low temperature or when heat dissipation is not required, the transmission ratio between the two shafts is adjusted by the movement of the variable-diameter second shaft, so that the cooling water does not circulate. When needed, the movement of the pump body assembly will be accelerated, causing the pump impeller to rotate and thus enabling the overall temperature reduction work.

[0009] Preferably, the diameter change trends of the variable-diameter first shaft and the variable-diameter second shaft are opposite.

[0010] Preferably, the variable-diameter second shaft includes a fixed shaft that rotates circumferentially and is axially slidably connected to the water collection tank, and a variable-diameter sleeve that is coaxially rotatably connected to the fixed shaft. The variable-diameter sleeve is provided at one end of the variable-diameter second shaft close to the body. The diameter of the variable-diameter sleeve gradually decreases from the end close to the body to the other end. A variable-diameter section corresponding to the variable-diameter sleeve is provided on the variable-diameter first shaft.

[0011] By adopting the above technical solution, during the process of not cooling down, the rotating shaft drives the variable-diameter first shaft to rotate, and the variable-diameter sleeve will rotate idly through the linkage belt, so that the pump body assembly cannot be driven. When the variable-diameter second shaft moves, the linkage belt moves relatively, and the variable-diameter sleeve does not move axially. The linkage belt will contact the fixed shaft, which will drive the pump impeller to rotate.

[0012] Preferably, the variable-diameter section is coaxially and fixedly provided at one end of the variable-diameter first shaft far from the body. The diameter of the variable-diameter section gradually increases from the end close to the body to the other end. The length of the variable-diameter section is equal to the length of the variable-diameter sleeve. The variable-diameter first shaft is circumferentially fixed and axially slidably connected to the rotating shaft.

[0013] By adopting the above technical solution, during idling, the linkage belt is connected to the variable-diameter sleeve with a larger diameter. When the two are linked, the variable-diameter section with a larger diameter drives the fixed shaft with a smaller diameter, forming a good driving effect on the pump impeller.

[0014] Preferably, conversion sleeves are rotatably connected to one end of the variable-diameter first shaft far from the body and one end of the variable-diameter second shaft close to the body. The conversion sleeves are axially slidably connected to the water collection tank along the rotating shaft. A driving member for driving the conversion sleeves to reciprocate is provided on the water collection tank.

[0015] By adopting the above technical solution, the conversion sleeves can ensure that when the variable-diameter first shaft and the variable-diameter second shaft rotate, they will not affect the axial sliding action. The existence of the driving member can enable both shaft bodies to move relatively and keep the contact perimeter of the linkage belt unchanged.

[0016] Preferably, a retainer for keeping the linkage belt on the same horizontal plane is provided in the water collection tank, and the retainer clamps the outside of the linkage belt.

[0017] Preferably, the upper side of the water collecting tank is open, and there is a gap between the opening and the outer wall of the machine body. A water retaining ring is arranged in the gap. The cross section of the water retaining ring is an inverted V shape, and there are gaps between both sides of the water retaining ring and the inner wall of the water collecting tank and the outer wall of the machine body.

[0018] By adopting the above technical solution, during collection, the water retaining ring can allow rainwater to enter, and the inverted V shape can minimize the possibility of water evaporation and loss. After evaporation, it will condense in the middle part of the water retaining ring and flow back again.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] Under normal working conditions, the rotation of the rotating shaft will cause the pump impeller to rotate at a low speed or not rotate. At this time, the water source will not enter the cooling liquid pipe. When it is high temperature, through the synchronous movement of the variable diameter first shaft and the variable diameter second shaft, the linkage belt is driven to transmit the rotation of the rotating shaft to the pump impeller, so that the water source in the water collecting tank is continuously transported along the loop, thereby gradually taking away the heat and achieving the cooling effect. Description of the Drawings

[0021] Figure 1 is the structural schematic diagram of the present application;

[0022] Figure 2 is the partial structural schematic diagram of the present application.

[0023] Description of the reference numerals: 100, machine body; 110, rotating shaft; 120, water collecting tank; 121, water retaining ring; 122, cooling liquid pipe; 123, mounting block; 124, pump box; 125, cage; 126, accommodating groove; 130, variable diameter first shaft; 131, variable diameter section; 140, variable diameter second shaft; 141, fixed shaft; 142, variable diameter sleeve; 150, linkage belt; 152, threaded rod; 160, pump impeller; 170, conversion sleeve; 171, linear motor. Detailed Description of the Embodiment

[0024] The following further describes the present application in detail with reference to the drawings.

[0025] A cooling tower motor, referring to Figure 1 、 Figure 2, including a body 100 and a rotating shaft 110 rotatably connected within the body 100. A water collecting tank 120 is provided at the lower end of the body 100. The diameter of the water collecting tank 120 is larger than that of the body 100, and the upper side is open. There is a gap between the opening and the outer wall of the body 100. The edge of the water collecting tank 120 is higher than the bottom of the body 100. A water retaining ring 121 is provided in the gap between the two. The cross-section of the water retaining ring 121 is an inverted V shape. There are gaps between both sides of the water retaining ring 121 and the inner wall of the water collecting tank 120 and the outer wall of the body 100. The fixing method is that there are several fixing points on the circumferential wall with the inner wall of the water collecting tank 120 for welding and fixing, so as to fix the water retaining ring 121 on the water collecting tank 120.

[0026] When the body 100 is exposed to rain, rainwater will flow down along the outer wall of the body 100 and thus enter the water collecting tank 120, or water source is added into the water collecting tank 120 regularly through pipelines or manually. During the evaporation process of the water source, it will be concentrated on the inner wall of the top of the water retaining ring 121, condense again and then drop, and the overall water loss is less.

[0027] A pump body assembly is connected to the bottom of the water collecting tank 120. A cooling liquid pipe 122 is closely arranged on the outer wall of the body 100. The water collecting tank 120, the pump body assembly and the cooling liquid pipe 122 are connected end to end to form a loop.

[0028] The pump body assembly is intermittently connected to the rotating shaft 110. When the pump body assembly is connected to the rotating shaft 110, the liquid in the water collecting tank 120 is circulated in the loop for cooling. In this embodiment, the pump body assembly includes a stepped first shaft 130 connected to the lower end of the rotating shaft 110, a stepped second shaft 140 rotatably connected to the water collecting tank 120, a linkage belt 150 drivingly connected to both ends of the stepped first shaft 130 and the stepped second shaft 140, and pump blades 160 circumferentially and fixedly arranged on the stepped second shaft 140 and located within the water collecting tank 120. There is an installation block 123 with a cavity on the lower side of the water collecting tank 120. There is also a pump box 124 for the pump blades 160 to rotatably connect under the installation block 123. The pump box 124 is communicated with the lower side of the water collecting tank 120 through a pipeline. The water source in the water collecting tank 120 will be introduced into the pump box 124, and the water source is pumped into the cooling liquid pipe 122 through the action of the pump blades 160, and the liquid outlet end of the cooling liquid pipe 122 is then connected back to the water collecting tank 120.

[0029] The stepped first shaft 130 and the stepped second shaft 140 are both parallel to the rotating shaft 110. The stepped second shaft 140 is slidably connected to the installation block 123 along the length direction for adjusting the transmission ratio from the rotating shaft 110 to the pump blades 160. In this embodiment, the stepped first shaft 130 is also slidably connected to the installation block 123, but in other embodiments, it can also be set that one of the shafts performs sliding movement as long as the change of the transmission ratio can be achieved.

[0030] The output end of the rotating shaft 110 penetrates into the mounting block 123. The first variable-diameter shaft 130 axially slides and is circumferentially fixed on the rotating shaft 110 (inserted by a connecting shaft with a rectangular cross-section so that the two can slide relative to each other). The two are coaxial. One end of the first variable-diameter shaft 130 away from the body 100 has a variable-diameter section 131. The diameter of the variable-diameter section 131 gradually increases from the end close to the body 100 to the other end. The diameter of the smaller end is equal to the diameter of the rotating shaft 110. The second variable-diameter shaft 140 includes a fixed shaft 141 that rotates circumferentially and slides axially on the mounting block 123, and a variable-diameter sleeve 142 that is rotatably connected coaxially to the fixed shaft 141. The variable-diameter sleeve 142 corresponds to the variable-diameter section 131. The diameter change trends of the first variable-diameter shaft 130 and the second variable-diameter shaft 140 are opposite. The diameter of the fixed shaft 141 is equal to the diameter of the rotating shaft 110. The diameter of the variable-diameter sleeve 142 gradually decreases from the end close to the body 100 to the other end. The pump impeller 160 is circumferentially fixedly connected to one end of the fixed shaft 141 away from the variable-diameter sleeve 142. Inserted by a connecting shaft with a rectangular cross-section so that the two can slide relative to each other.

[0031] The linkage belt 150 is sleeved on the first variable-diameter shaft 130 and the second variable-diameter shaft 140. And in this embodiment, when the first variable-diameter shaft 130 and the second variable-diameter shaft 140 move, the linkage belt 150 remains stationary in the horizontal direction and only undergoes stretching. To achieve this purpose, a cage 125 is provided in the mounting block 123. The cage 125 has a receiving groove 126 for the outer side of the linkage belt 150 to be embedded. And the length of the receiving groove 126 in the horizontal direction is greater than the horizontal length of the linkage belt 150, with a length sufficient for the linkage belt 150 to deform. It should be noted that in this embodiment, when the linkage belt 150 is sleeved on the fixed shaft 141 or the small-diameter part of the first variable-diameter shaft 130, it is in a taut state. When sleeved on the variable-diameter section 131 or the variable-diameter sleeve 142, it can increase the transmission stability. At the same time, if the pump impeller 160 gets stuck, it can also make the two separate without affecting the operation of the body 100 itself.

[0032] A conversion sleeve 170 is rotatably connected to one end of the variable-diameter first shaft 130 away from the machine body 100 and one end of the variable-diameter second shaft 140 close to the machine body 100. The conversion sleeve 170 is axially slidably connected to the water collecting tank 120 along the rotating shaft 110. A driving member for driving the conversion sleeve 170 to reciprocate is provided on the water collecting tank 120. In this embodiment, the driving member is a linear motor 171, and in other embodiments, it can be other linear pushing members. The two linear motors 171 move synchronously. One is on the upper side of the mounting block 123 and is connected to the variable-diameter second shaft 140, and the other is on the lower side of the mounting block 123 and is connected to the variable-diameter first shaft 130. The driving member causes the two shafts to move up and down. In this way, the linkage belt 150 will contact different diameter segments. The cage 125 limits the linkage belt 150 in the vertical direction. And due to the different contact diameters, the linkage belt 150 can deform horizontally in the receiving groove 126.

[0033] Therefore, when cooling is not required, the rotation of the rotating shaft 110 will be transmitted to the variable-diameter sleeve 142. At this time, the variable-diameter sleeve 142 idles. And when cooling is required, the variable-diameter first shaft 130 and the variable-diameter second shaft 140 perform vertical sliding in the same direction (upward) (in this embodiment, the upward movement of the two shafts is the start of cooling, and the downward movement is the idling of the variable-diameter sleeve 142). At this time, the linkage belt 150 will contact the fixed shaft 141, and the two will transmit power. At this time, the pump impeller 160 works to realize circulating liquid supply. With the continuous liquid flow, the heat in the machine body 100 is continuously taken away, achieving the cooling effect and improving the working effect of the cooling tower motor in a high-temperature environment.

[0034] The embodiments of this specific implementation manner are all preferred embodiments of this application. Without restricting the protection scope of this application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A cooling tower motor, comprising a body (100) and a rotating shaft (110) rotatably connected within the body (100), characterized in that: A water collecting tank (120) is provided at the lower end of the machine body (100). A pump body assembly is connected to the bottom of the water collecting tank (120). A cooling liquid pipe (122) is closely arranged on the outer wall of the machine body (100). The water collecting tank (120), the pump body assembly, and the cooling liquid pipe (122) are connected end to end to form a loop. The pump body assembly is intermittently connected to the rotating shaft (110). When the pump body assembly is connected to the rotating shaft (110), the liquid in the water collecting tank (120) is circulated in the loop for cooling. The pump body assembly includes a stepped first shaft (130) connected to the lower end of the rotating shaft (110), a stepped second shaft (140) rotatably connected to the water collecting tank (120), a linkage belt (150) drivingly connected to both ends of the stepped first shaft (130) and the stepped second shaft (140), and pump blades (160) circumferentially fixed on the stepped second shaft (140) and located inside the water collecting tank (120). The stepped first shaft (130) and the stepped second shaft (140) are both parallel to the rotating shaft (110). The stepped second shaft (140) is slidably connected to the water collecting tank (120) along the length direction for adjusting the transmission ratio from the rotating shaft (110) to the pump blades (160).

2. The cooling tower motor according to claim 1, wherein: The diameter change trends of the stepped first shaft (130) and the stepped second shaft (140) are opposite.

3. The motor of a cooling tower according to claim 2, characterized in that: The stepped second shaft (140) includes a fixed shaft (141) rotatably and axially slidably connected to the water collecting tank (120), and a stepped sleeve (142) coaxially rotatably connected to the fixed shaft (141). The stepped sleeve (142) is arranged at one end of the stepped second shaft (140) close to the machine body (100). The diameter of the stepped sleeve (142) gradually decreases from the end close to the machine body (100) to the other end. A stepped section (131) corresponding to the stepped sleeve (142) is arranged on the stepped first shaft (130).

4. The cooling tower motor according to claim 3, characterized in that: The stepped section (131) is coaxially and fixedly arranged at one end of the stepped first shaft (130) away from the machine body (100). The diameter of the stepped section (131) gradually increases from the end close to the machine body (100) to the other end. The length of the stepped section (131) is equal to the length of the stepped sleeve (142). The stepped first shaft (130) is circumferentially fixed and axially slidably connected to the rotating shaft (110).

5. The cooling tower motor according to claim 4, wherein: Conversion sleeves (170) are rotatably connected to one end of the stepped first shaft (130) away from the machine body (100) and one end of the stepped second shaft (140) close to the machine body (100). The conversion sleeves (170) are axially slidably connected to the water collecting tank (120) along the axis of the rotating shaft (110). A driving member for driving the conversion sleeves (170) to reciprocate is arranged on the water collecting tank (120).

6. The cooling tower motor according to claim 5, wherein: A holder (125) for keeping the linkage belt (150) on the same horizontal plane is arranged inside the water collecting tank (120). The holder (125) clamps the outside of the linkage belt (150).

7. A cooling tower motor according to claim 6, characterized in that: The upper side of the water collecting tank (120) is open, and there is a gap between the opening and the outer wall of the machine body (100). A water retaining ring (121) is arranged in the gap. The cross section of the water retaining ring (121) is an inverted V shape, and there are gaps between both sides of the water retaining ring (121) and the inner wall of the water collecting tank (120) and the outer wall of the machine body (100).

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