Crusher rotor cooling device

Abstract

The utility model discloses a crusher rotor cooling device which comprises a crusher body, a rotor of the crusher body is of a hollow structure, an inner air pipeline is arranged in the rotor and connected with a hollow rotor driven shaft, the rotor driven shaft is connected with an air inlet pipeline, and a rotor cooling air outlet pipe is arranged on the crusher body. And the rotor cooling air outlet pipe is communicated with a space between the inner air pipeline and the rotor driven shaft. An inner ventilation pipeline is inserted in the middle of each crusher shaft, circulating ventilation cooling is carried out on the interior of the shaft through a cooling fan, the temperature of the crusher shaft is effectively reduced, and the situation that due to long-term crushing of high-temperature clinker, a crusher rotor shaft is insufficiently cooled, the shaft is heated to deform, and the bearing temperature is high due to high-temperature heat transfer of the shaft is avoided; and even the service life of the bearing is directly influenced, the crusher shell is changed into a hollow structure, the ventilation pipe is connected, circulating ventilation cooling is conducted on the interior of the shell, the equipment shell is effectively protected, and the situation that the service life of equipment is influenced due to shell deformation and cracking caused by high temperature is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of crusher cooling, and in particular relates to a crusher rotor cooling device. Background Art

[0002] The clinker grate cooler is a crucial piece of equipment in the cement plant's clinker firing system. Its primary function is to cool and convey the cement clinker. It also provides hot air to the rotary kiln and precalciner, serving as the primary heat recovery device in the firing system. The grate cooler is a key component of the clinker crusher. The hammer-type clinker crusher, originally used for the grate cooler, has been gradually replaced by the roller-type clinker crusher due to drawbacks such as rapid hammer head wear, high power consumption, and uneven crushing. The roller-type clinker crusher offers low vibration, minimal roller sleeve wear, high crushing efficiency, and minimal wasted work. The roller crusher also exhibits minimal wear overall, operates at a low spindle speed, and has a heat-resistant and wear-resistant roller sleeve surface, resulting in minimal wear. The roller crusher also boasts low energy consumption, requiring only the equivalent motor power of a hammer crusher, saving 30%-40% of the power, resulting in significant cost savings. The output particle size of the roller crusher is small and stable, and there are micro cracks on the surface after extrusion. This not only improves the grindability, but also appropriately reduces the power consumption of subsequent equipment such as roller presses and cement mills.

[0003] With equipment optimization and upgrades, and increasing requirements for heat recovery in grate coolers, some clinker production lines have replaced the grate bed of the grate cooler with a two-stage grate bed and incorporated the clinker crusher into a center-mounted roller crusher. This has the advantage of pre-grinding large lumps of clinker for early crushing and cooling, further improving heat recovery in the grate cooler and effectively increasing secondary air temperature and waste heat recovery for power generation. However, the problem is that clinker temperatures in this area can reach as high as 800°C. Long-term operation of the roller crusher rotor shaft can lead to insufficient cooling and even deformation. Furthermore, high-temperature heat transfer leads to high bearing temperatures, directly impacting bearing service life. Utility Model Content

[0004] The purpose of the utility model is to provide a crusher rotor cooling device, which changes the crusher rotor shaft into a hollow shaft and adopts a high-pressure axial flow fan to ventilate and cool the shaft continuously, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a crusher rotor cooling device, comprising a crusher body, wherein the crusher body rotor is configured as a hollow structure, an inner air duct is arranged inside the rotor, the inner air duct is connected to the hollow rotor driven shaft, the rotor driven shaft is connected to the air inlet pipe, a rotor cooling air outlet duct is arranged on the crusher body, and the rotor cooling air outlet duct connects the space between the inner air duct and the rotor driven shaft.

[0006] Preferably, an air volume regulating valve is provided on the air inlet pipe.

[0007] Preferably, a thermometer is provided on the rotor cooling air outlet pipe.

[0008] Preferably, the shell of the crusher body is also configured as a hollow structure, the shell is connected to a shell cooling air inlet pipe, and a plurality of shell cooling air outlets are provided on the shell.

[0009] Preferably, the rotor driven shaft is mounted on a bearing seat.

[0010] Preferably, the rotor driven shaft is connected to the air inlet pipeline through a metal hose.

[0011] The technical effects and advantages of the utility model are as follows: an internal ventilation duct is inserted in the middle of each crusher shaft, and the interior of the shaft is circulated and ventilated by the cooling fan, which effectively reduces the temperature of the crusher shaft, avoids the long-term crushing of high-temperature clinker causing insufficient cooling of the crusher rotor shaft, heat deformation of the shaft, high temperature heat transfer of the shaft leading to high bearing temperature, and even directly affecting the service life of the bearing;

[0012] The crusher shell is changed to a hollow structure and connected to a ventilation pipe to circulate ventilation and cooling inside the shell, which effectively protects the equipment shell and prevents the shell from deformation and cracking due to high temperature, which affects the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is a schematic diagram of cooling a single rotor of the present invention;

[0015] Figure 3 for Figure 2 Schematic diagram of the middle C direction;

[0016] Figure 4 This is a schematic diagram of the crusher casing cooling of the present invention.

[0017] In the figure: 1. Air inlet pipe; 2. Air volume control valve; 3. Metal hose; 4. Rotor driven shaft; 5. Internal air duct; 6. Thermometer; 7. Rotor cooling air outlet pipe; 8. Shell cooling air inlet pipe. DETAILED DESCRIPTION

[0018] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0019] The utility model provides Figure 1-4The crusher rotor cooling device shown in the figure includes a crusher body, a motor on the crusher body drives the rotor to rotate, and the rotor crushes the material. The crusher body rotor is set as a hollow structure, and an internal air duct 5 is installed in the rotor to be supported in the hollow shaft. The rotor driven shaft 4 is connected to the air inlet pipe 1 through a metal hose 3. The metal hose 3 is installed on each rotor cooling pipe to alleviate the impact and vibration of high-pressure cooling on the pipe, thereby causing cracking and air leakage in the pipe; the air inlet pipe 1 uses a steel pipe as the main ventilation pipe, which is connected to the corresponding end of the crusher rotor branch pipe that needs to be cooled. The rotor driven shaft 4 is connected in parallel with the openings, and the rotor driven shaft 4 is installed on the bearing seat; an air volume regulating valve 2 is provided on the air inlet pipe 1, which is used to adjust the air volume required for each rotor cooling pipe; a rotor cooling air outlet duct 7 is provided on the crusher body, and the rotor cooling air outlet duct 7 is connected to the space between the internal air duct 5 and the rotor driven shaft 4; external cooling air is blown in to circulate and cool the rotor; the wind after rotor cooling is discharged through the rotor cooling air outlet duct 7. Since the outlet cooling air has a certain temperature, it can be connected to the waste heat recovery device for heat recovery.

[0020] Specifically, a thermometer 6 is provided on the rotor cooling air outlet pipe 7, and the opening of the air volume regulating valve 2 is adjusted according to the temperature displayed by the thermometer 6 to meet the required cooling air volume in the rotor;

[0021] like Figure 2 As shown, when the rotor is cooled, the cooling air enters from the air inlet A of the air inlet duct 1, enters the inner air duct 5 from each rotor driven shaft 4 along the air inlet duct 1, and flows along the inner air duct 5 to the left end, then flows back from the space between the inner air duct 5 and the inner hole of the rotor, enters the rotor cooling air outlet duct 7, and is discharged from the a port.

[0022] Specifically, the shell of the crusher body is also set to a hollow structure, the shell is connected to the shell cooling air inlet pipe 8, and a plurality of shell cooling air outlets are set on the shell.

[0023] When cooling the shell, cooling air enters from the inlet B of the shell cooling air inlet pipe 8, enters the shell through the shell cooling air inlet pipe 8, and is discharged from the outlet B on the shell.

[0024] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A crusher rotor cooling device, comprising a crusher body, characterized in that: The rotor of the crusher body is configured as a hollow structure, an inner air duct (5) is provided inside the rotor, the inner air duct (5) is connected to a hollow rotor driven shaft (4), the rotor driven shaft (4) is connected to an air inlet pipe (1), a rotor cooling air outlet duct (7) is provided on the crusher body, and the rotor cooling air outlet duct (7) communicates with the space between the inner air duct (5) and the rotor driven shaft (4).

2. A crusher rotor cooling device according to claim 1, characterized in that: An air volume regulating valve (2) is provided on the air inlet pipeline (1).

3. A crusher rotor cooling device according to claim 1, characterized in that: A thermometer (6) is provided on the rotor cooling air outlet pipe (7).

4. A crusher rotor cooling device according to claim 1, characterized in that: The shell of the crusher body is also configured as a hollow structure, the shell is connected to a shell cooling air inlet pipe (8), and a plurality of shell cooling air outlets are provided on the shell.

5. The crusher rotor cooling device according to claim 1, characterized in that: The rotor driven shaft (4) is mounted on a bearing seat.

6. A crusher rotor cooling device according to claim 1, characterized in that: The rotor driven shaft (4) is connected to the air inlet pipeline (1) via a metal hose (3).

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