Large motor cooling device

Abstract

The utility model discloses a large motor cooling device which comprises two parallel rails, a fan is arranged on the rails in a sliding mode, a cooling device is arranged at the tail end of the fan, a cold air cavity communicated with a motor is arranged at the tail end of the cooling device, and the cold air cavity is detachably connected with the cooling device through a connecting device. The connecting device comprises a connecting column and a locking handle, the great air inlet amount is guaranteed, installation is easy, use is convenient, and the cooling effect of the motor is greatly improved.

Description

Technical Field

[0001] The utility model relates to a motor cooling device, in particular to a large motor cooling device. Background Art

[0002] Since most of the power equipment in coal chemical enterprises is driven by electricity, electric motors are widely used. Generally, large electric air-cooled coolers are standard configurations of motor manufacturers. During their application, when some special working conditions occur, such as the poor use environment of the motor, motor aging, frequency conversion, etc., the cooling capacity cannot meet the normal cooling needs of the motor, which will cause the operating temperature of the motor to rise abnormally. When the temperature protection trip threshold of the equipment is exceeded, the equipment will trip. The previous treatment method was to solve it by adding temporary fans or reversing spare motors on site. However, due to the characteristics of continuous production in chemical enterprises, it takes a certain amount of time to set up temporary fans, and they are often not used in time. In order to ensure the stability of the process, the process conditions are not allowed to be reversed before they are adjusted in place in a short time. This will cause the motor temperature to continue to rise and there will be no effective treatment methods, which will cause the motor to trip. The existing small cooling device is difficult to meet the cooling needs of the existing large motor production. If the cooling is not timely, it will often lead to production reduction or even shutdown, which seriously affects the economic benefits. Utility Model Content

[0003] The utility model aims to overcome the disadvantage of unsatisfactory cooling effect of large motors in the prior art and provide a large motor cooling device.

[0004] The utility model is realized through the following technical scheme: a large electric motor cooling device, comprising two parallel tracks, a fan is slidably arranged on the tracks, a cooling device is arranged at the end of the fan, a cold air chamber connected to the motor is arranged at the end of the cooling device, the cold air chamber and the cooling device are detachably connected through a connecting device, and the connecting device includes a connecting column and a locking handle.

[0005] Furthermore, the cooling device includes a first cooler and a second cooler, and the first cooler is fixedly connected to the fan.

[0006] Furthermore, the bottoms of the first cooler, the second cooler and the cold air cavity are all provided with track wheels, and the sides of the first cooler, the second cooler and the cold air cavity are all provided with locking plates connected to the sides of the track.

[0007] Furthermore, the end sides of the first cooler and the second cooler are provided with connecting plates, the front sides of the second cooler and the cold air cavity are provided with connecting columns, the connecting plates are provided with connecting holes that cooperate with the connecting columns, and the locking handle is clamped with the connecting columns.

[0008] Furthermore, the end of the connecting plate is provided with a bend toward the end, and a sealing strip is provided on the inner side of the connecting plate.

[0009] Furthermore, two fans are arranged horizontally side by side, and the outlet of the cold air chamber is provided with a plurality of ventilation holes.

[0010] The beneficial effects of the utility model are: a fan is slidably arranged on the track, and two fans are horizontally arranged side by side to ensure a large air intake volume. The first cooler is fixedly connected to the fan. Due to the large air intake volume, the first cooler and the second cooler are used to increase the cooling effect of the air volume. The air inlet of the fan can be connected to the air outlet of the motor, which can reduce the negative pressure generated inside the space and enhance the use effect. The bottom of the first cooler, the second cooler and the cold air cavity are all provided with track wheels, and the sides of the first cooler, the second cooler and the cold air cavity are all provided with locking plates connected to the side of the track. The connecting column and the locking handle are loosened at the connection point, and the cold air cavity, the second cooler and the fan can all slide along the track and can be maintained in sections after separation, which greatly improves the work efficiency during maintenance and reduces the work difficulty. At the same time, hooks are welded on the side walls. When any section is damaged, a crane can be used to lift the damaged module away. After replacing the new module, it can be quickly installed and used, which reduces the maintenance time and improves the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic top view of the overall structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the overall front view structure of the utility model;

[0013] Figure 3 It is a schematic diagram of the overall side view structure of the utility model;

[0014] Figure 4 It is a structural schematic diagram of the connection device of the utility model;

[0015] Figure 5 This is a schematic diagram of the fan control principle structure of the utility model;

[0016] Wherein: 1. fan; 101. first cooler; 102. second cooler; 103. cold air chamber; 2. connecting plate; 201. connecting column; 202. locking handle; 203. sealing strip; 3. track; 301. locking plate; 302. track wheel. DETAILED DESCRIPTION

[0017] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Example 1

[0020] like Figure 1-4 As shown: a large motor cooling device, including two parallel tracks 3, a fan 1 is slidably arranged on the track 3, two fans 1 are arranged horizontally side by side to ensure a large air intake, a cooling device is arranged at the end of the fan 1, and a cold air cavity 103 connected to the motor is arranged at the end of the cooling device, the cooling device includes a first cooler 101 and a second cooler 102, the first cooler 101 is fixedly connected to the fan 1, due to the large air intake, the first cooler 101 and the second cooler 102 are used to increase the cooling effect of the air volume, and the fan 1 The air inlet can be connected to the air outlet of the motor, which can reduce the generation of negative pressure inside the space and enhance the use effect. The outlet of the cold air chamber 103 is provided with multiple ventilation holes, and bolt holes are opened on the outside of the ventilation holes. Air ducts can be installed on the bolt holes. The air ducts lead the cold air to the motor, and different air volumes can be controlled according to different usage. The installation is simple and easy to use, which greatly improves the cooling effect of the motor. The cold air chamber 103 can mix the cooling air of the two fans 1 to prevent pressure difference caused by different air pressures and improve the cooling effect.

[0021] The first cooler 101, the second cooler 102 and the cold air chamber 103 are all provided with track wheels 302 at their bottoms, and the first cooler 101, the second cooler 102 and the cold air chamber 103 are all provided with locking plates 301 connected to the side of the track 3 at their sides. Since the fan 1 and the first cooler 101 and the second cooler 102 are large in size, the first cooler 101 and the second cooler 102 need to be inspected and maintained inside after long-term use. The whole is set to three sections, and each section is fixed on the track 3. During maintenance, it is only necessary to separate the locking plate 301 at the bottom from the track 3, and loosen the connecting column 201 and the locking handle 202 at the connection. The cold air chamber 103, the second cooler 102 and the fan 1 can all slide along the track 3. After separation, they can be maintained in sections, which greatly improves the work efficiency during maintenance and reduces the difficulty of work. At the same time, hooks are welded on the side walls. When any section is damaged, the damaged module can be hoisted away by a crane. After replacing the new module, it can be quickly installed and used, reducing maintenance time and improving the use effect. The outer diameter of the fan is φ8000mm, and a filter is installed at the inlet of the cooling fan to prevent foreign matter from entering the cooling device of the motor. It should be noted that the forced ventilation volume of the cooling fan must be greater than the forced cooling air volume of the original device to ensure the effect. By monitoring the air volume, calculating and verifying multiple experiments, selecting a fan with a suitable air volume can achieve a good cooling effect. The power supply of the cooling motor causes the forced cooling automatic control box to realize automatic and manual forced cooling control. Three holes with a diameter of φ10 are opened on the side panel of the cooler and internal threads are tapped to install the local temperature meter, local humidity meter and temperature relay probe respectively.

[0022] The cooling fan motor of the forced cooling automatic control performs the control and protection functions of the cooling fan motor through the control circuit of the contactor, thermal relay and other components. There are three control modes as follows:

[0023] 1. Manual control: The start and stop buttons of the on-site control items are used to realize the start and stop control of the forced cooling fan motor, so that the operator can start and stop manually according to the on-site environmental requirements or in case of faults.

[0024] 2. A temperature control relay is installed at the bottom of the on-site cooler. When the circulating air temperature in the motor cavity is higher than the set value, it means that the cooling effect of the cooler has not met the motor's demand for circulating cooling air volume. At this time, the temperature relay will close and start the cooling fan to enhance the ventilation and cooling effect of the cooling fan.

[0025] 3. The speed analog signal of the inverter is connected to the ⑤⑥ terminals of the HART1 controller. The program is set in the HART1 controller according to the actual operating conditions. When the motor is in operation and the motor speed is lower than 60% of the rated speed, it means that the motor is working in a low speed state. The fan cooling of the motor itself cannot achieve the effect of cooling the motor. At this time, the controller controls the output terminals ③④ to close so that the relay absorbs and starts the cooling fan to enhance the cooling and ventilation of the motor.

[0026] 4. Connect the start and stop signals to the centralized control platform. Operators can also start and stop the fan as needed by monitoring the temperature rise of the motor winding.

[0027] 5. A thermometer is installed on site to verify the accuracy of the on-site and back-end meters and to check on site. At the same time, the on-site hygrometer can monitor the humidity inside the motor. When the humidity is too high and there is a risk of condensation, the motor should be dried and repaired in time.

[0028] The cold air chamber 103 is detachably connected to the cooling device through a connecting device, and the connecting device includes a connecting column 201 and a locking handle 202. The end sides of the first cooler 101 and the second cooler 102 are provided with connecting plates 2, and the front end sides of the second cooler 102 and the cold air chamber 103 are provided with connecting columns 201. The connecting plate 2 is provided with connecting holes that cooperate with the connecting columns 201, and the locking handle 202 is snap-connected with the connecting column 201. The end of the connecting plate 2 is provided with a bend toward the end, and a sealing strip 203 is provided on the inner side of the connecting plate 2. The sealing strip 203 is used to ensure the sealing of the connection. The connecting hole uses a waist-shaped hole, and the error gap can be adjusted to facilitate installation and connection. The locking handle 202 can quickly realize the installation and disassembly of the connecting column 201, reduce the difficulty of operation and improve the use effect.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large motor cooling device, characterized in that: It comprises two parallel tracks, on which a fan is slidably arranged, a cooling device is arranged at the end of the fan, a cold air chamber connected to the motor is arranged at the end of the cooling device, the cold air chamber and the cooling device are detachably connected via a connecting device, and the connecting device comprises a connecting column and a locking handle.

2. The large electric motor cooling device according to claim 1 is characterized in that: The cooling device comprises a first cooler and a second cooler, and the first cooler is fixedly connected to the fan.

3. The large electric motor cooling device according to claim 2 is characterized in that: The bottoms of the first cooler, the second cooler and the cold air cavity are all provided with track wheels, and the sides of the first cooler, the second cooler and the cold air cavity are all provided with locking plates connected to the side of the track.

4. The large electric motor cooling device according to claim 2, characterized in that: The end sides of the first cooler and the second cooler are provided with connecting plates, the front sides of the second cooler and the cold air cavity are provided with connecting columns, the connecting plates are provided with connecting holes that cooperate with the connecting columns, and the locking handle is clamped with the connecting columns.

5. The large electric motor cooling device according to claim 4, characterized in that: The end of the connecting plate is provided with a bend toward the end, and a sealing strip is provided on the inner side of the connecting plate.

6. The large electric motor cooling device according to claim 1, characterized in that: Two fans are arranged horizontally side by side, and the outlet of the cold air chamber is provided with a plurality of ventilation holes.

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