Roots blower with cooling fan

Abstract

The utility model provides a Roots blower with a cooling fan, which is provided with a blower main body, the blower main body comprises a blower shell, a rotating shaft is arranged in the blower shell, the front end part of the rotating shaft is positioned on the outer side of the blower shell, and a coupler is fixedly arranged on the rotating shaft positioned on the outer side part of the blower shell. And a cooling fan is fixedly arranged at the end part of the axial inner side of the coupling. The air blower solves the problem that cooling water cannot be used for reducing the temperature of lubricating oil when no cooling water is used on a use site due to the fact that an existing air blower conducts heat dissipation and cooling on internal parts of the air blower through the cooling water. The Roots blower can be widely applied to heat dissipation and cooling of the whole Roots blower.

Description

Technical Field

[0001] The utility model relates to a Roots blower, in particular to a Roots blower with a heat dissipation fan. Background Art

[0002] As a typical gas boosting and conveying machine, Roots blower is widely used in building materials, electric power, smelting, mining, aquaculture, sewage treatment, chemical industry and other industries. Its working principle relies on the mutually meshing impellers rotating at a constant speed in opposite directions in the casing, pushing the gas in the closed volume surrounded by the casing, wall panels and impellers, and continuously discharging it from the air inlet to the air outlet, thereby achieving the purpose of blowing.

[0003] During the use of Roots blower, a large amount of heat will be generated by the bearings, gears and exhaust ports. In order to avoid excessive temperature and affect the normal operation of the Roots blower, cooling water is usually injected into the blower oil tank jacket to reduce the temperature of the lubricating oil inside the blower, thereby reducing the temperature of internal components such as bearings and gears, and avoiding damage to internal components such as bearings and gears due to excessive temperature.

[0004] However, when there is no cooling water at the blower operation site, cooling water cannot be used to lower the lubricating oil temperature. Therefore, there is an urgent need for a device that can achieve overall heat dissipation of the blower through the operation of the blower itself, without relying solely on injecting cooling water into the blower oil tank jacket to meet the blower heat dissipation requirements. Utility Model Content

[0005] In view of the above technical problems, the utility model provides a Roots blower with a cooling fan. The Roots blower with a cooling fan is installed on a coupling of the blower. When the blower is running, the rotating shaft drives the cooling fan to rotate synchronously, so as to efficiently dissipate heat for the blower as a whole, reduce the temperature of the blower casing and internal components, avoid damage to the blower casing and internal components due to excessive temperature, and ensure that the blower can operate stably for a long time.

[0006] To this end, the technical solution of the utility model is a Roots blower with a cooling fan, which is provided with a blower body, the blower body including a blower casing, a rotating shaft being provided inside the blower casing, the front end portion of the rotating shaft being located outside the blower casing, a coupling being fixedly provided on the rotating shaft located on the outer portion of the blower casing, and a cooling fan being fixedly provided on the axial inner end portion of the coupling.

[0007] Preferably, a fan fixing seat plate is provided in the middle of the heat dissipation fan, and fan blades are fixedly provided on the outer circumference of the fan fixing seat plate;

[0008] A fan positioning hole is provided in the middle of the fan fixing base plate, and a fan mounting hole is provided on the fan fixing base plate near the outer side. The fan positioning hole is sleeved on the outer side of the rotating shaft and is fixed by a locking screw passing through the fan mounting hole and the axial inner end screw of the coupling.

[0009] Preferably, the number of fan blades is 7.

[0010] Preferably, reinforcing ribs are provided at the locations where the fan blades and the fan fixing seat plate are connected.

[0011] Preferably, there are multiple fan mounting holes, and the multiple fan mounting holes are evenly distributed along the circumferential direction on the fan fixing base plate.

[0012] Preferably, a gap is provided between the fan positioning hole and the outer circumferential surface of the rotating shaft, and the gap size is 1.5 cm±0.3 cm.

[0013] The beneficial effect of the utility model is that by installing a cooling fan on the coupling of the blower, when the blower is running, the rotating shaft drives the cooling fan to rotate synchronously, thereby efficiently dissipating heat for the blower as a whole, reducing the temperature of the blower casing and internal components, avoiding damage to the blower casing and internal components due to excessive temperature, and ensuring that the blower can operate stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the front view of the utility model;

[0015] Figure 2 This is the front view of the heat dissipation fan of the utility model;

[0016] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0017] Explanation of symbols in the figure:

[0018] 1. Blower body; 101. Blower housing; 2. Coupling; 3. Cooling fan; 301. Fan blades; 302. Fan fixing base plate; 303. Fan positioning hole; 304. Fan mounting hole; 305. Reinforcement rib; 4. Rotating shaft; 5. Locking screw. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with embodiments.

[0020] pass Figure 1-Figure 3It can be seen that the Roots blower with a cooling fan is provided with a blower body 1, and the blower body 1 includes a blower casing 101. A rotating shaft 4 is provided inside the blower casing 101, and a front end portion of the rotating shaft 4 is located outside the blower casing 101. A coupling 2 is fixedly provided on the rotating shaft 4 located on the outer portion of the blower casing 101, and a cooling fan 3 is fixedly provided on the axial inner end portion of the coupling 2. When the blower is running, the rotating shaft 4 rotates at a high speed, driving the cooling fan 3 to rotate synchronously. Through the high-speed rotation of the cooling fan 3, the overall blower is efficiently cooled, thereby reducing the temperature of the blower casing and internal components.

[0021] A fan fixing seat plate 302 is provided in the middle of the heat dissipation fan 3 , and fan blades 301 are fixedly provided on the outer circumference of the fan fixing seat plate 302 .

[0022] A fan positioning hole 303 is provided in the middle position of the fan fixing base plate 302, and a fan mounting hole 304 is provided near the outer side of the fan fixing base plate 302. The fan positioning hole 303 is sleeved on the outer side of the rotating shaft 4 and is fixed by a locking screw 5 passing through the fan mounting hole 304 and the axial inner end screw of the coupling 2.

[0023] By setting the fan mounting hole 304 at a position close to the outside of the fan fixing base plate 302, the fixing area of ​​the fan fixing base plate 302 and the coupling 2 can be increased, thereby ensuring the stability of the fixation between the fan fixing base plate 302 and the coupling 2, and reducing the overall shaking amplitude of the cooling fan 3 when the cooling fan 3 rotates at high speed, thereby avoiding the problem of shaking of the blower body 1 during operation.

[0024] The number of fan blades 301 is 7. If there are too few fan blades 301, the normal heat dissipation demand of the blower cannot be met. If there are too many fan blades 301, the high-speed rotation of the cooling fan 3 may easily cause the blower to resonate. In addition, if there are too many fan blades 301, the spacing between adjacent fan blades 301 becomes smaller, which directly leads to a decrease in the air intake volume, and the problem of insufficient normal heat dissipation of the blower may also occur. Therefore, the number of fan blades 301 is set to 7 to achieve the best heat dissipation effect.

[0025] Reinforcing ribs 305 are provided at the connection positions of the fan blades 301 and the fan fixing seat plate 302, which can further increase the stability of the fan fixing seat plate 302 and the surrounding positions, reduce the overall shaking amplitude of the cooling fan 3 when the cooling fan 3 rotates at high speed, and further avoid the problem of shaking of the blower body 1 during operation.

[0026] There are multiple fan mounting holes 304, which are evenly distributed along the circumferential direction on the fan fixing base plate 302, further ensuring the uniformity of the fit between the fan fixing base plate 302 and the coupling 2, thereby ensuring the stability of the fixation between the fan fixing base plate 302 and the coupling 2.

[0027] There is a gap between the inner surface of the fan positioning hole 303 and the outer circumference of the rotating shaft 4, and the gap size is 1.5cm±0.3cm. If there is no reserved gap between the inner surface of the fan positioning hole 303 and the outer circumference of the rotating shaft 4, the rotating shaft 4 and the cooling fan 3 will resonate with each other, resulting in different degrees of noise and jitter when the blower is running.

[0028] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A Roots blower with a cooling fan, characterized in that: A blower body is provided, which includes a blower casing. A rotating shaft is provided inside the blower casing. The front end portion of the rotating shaft is located outside the blower casing. A coupling is fixedly provided on the rotating shaft located on the outer portion of the blower casing. A cooling fan is fixedly provided on the axial inner end portion of the coupling.

2. The Roots blower with a heat dissipation fan according to claim 1, characterized in that: A fan fixing seat plate is provided in the middle of the heat dissipation fan, and fan blades are fixedly provided on the outer circumference of the fan fixing seat plate; A fan positioning hole is provided in the middle position of the fan fixing base plate, and a fan mounting hole is provided on the fan fixing base plate near the outer side. The fan positioning hole is sleeved on the outer side of the rotating shaft and is fixed by a locking screw passing through the fan mounting hole and the axial inner end screw of the coupling.

3. The Roots blower with a heat dissipation fan according to claim 2, characterized in that: A gap is provided between the fan positioning hole and the outer circumferential surface of the rotating shaft, and the size of the gap is 1.5 cm±0.3 cm.

4. The Roots blower with a heat dissipation fan according to claim 3, characterized in that: The number of the fan blades is 7.

5. The Roots blower with a heat dissipation fan according to claim 4, characterized in that: The number of the fan mounting holes is multiple, and the multiple fan mounting holes are evenly distributed along the circumferential direction on the fan fixing base plate.

6. The Roots blower with a heat dissipation fan according to claim 5, characterized in that: A reinforcing rib is provided at the position where the fan blades and the fan fixing seat plate are connected.

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