Low-flow-resistance type dustproof mechanism for air inlet duct of Roots blower

Abstract

The utility model discloses a low-flow-resistance type dustproof mechanism for an air inlet duct of a Roots blower, and particularly relates to the technical field of fluid machinery, the low-flow-resistance type dustproof mechanism comprises a base, a flow guide dustproof cavity, a spiral flow deflector and a detachable dust collection box, the center of an air inlet is provided with a limiting loading frame, and the spiral flow deflector is arranged on the inner surface of the flow guide dustproof cavity; the detachable dust collection box is mounted at the edge of the bottom of the flow guide dustproof cavity; according to the utility model, a channel is formed by the divergent flow guide dustproof cavity and the spiral flow deflectors, a filter screen or a baffle plate is not needed, and the channel is not blocked by solid obstacles, so that the airflow can keep relatively stable speed and direction, the airflow resistance is greatly reduced, and the fan can suck more air under the same power input, so that the service life of the fan is prolonged. The fan is suitable for severe working conditions such as high humidity and high dust, the working efficiency of the fan is improved, dynamic self-cleaning is achieved by driving the separation process through power of airflow, and the detachable dust collection box can be rapidly drawn out for cleaning.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery technology, and more specifically, to a low-resistance dustproof mechanism for the air inlet duct of a Roots blower. Background Technology

[0002] The principle of a Roots blower is that it is a rotary compressor that uses two lobe-shaped rotors to compress and transport gas by moving relative to each other in a cylinder.

[0003] A search revealed that patent publication number CN222111217U discloses an air inlet dust prevention mechanism for a Roots blower, comprising a buffer dust removal pipe, an outlet top seat, a dust filtration and cleaning structure, and a dust collection and discharge structure. The outlet top seat is threaded onto the buffer dust removal pipe, the dust filtration and cleaning structure is located on the buffer dust removal pipe, and the dust collection and discharge structure is located on the buffer dust removal pipe. The dust filtration and cleaning structure includes a threaded seat, a disassembly seat, a support frame, a dustproof net, a fixed seat, a vibration motor, an eccentric block, an air inlet pipe, a disassembly head, and two large particle nets. This invention effectively solves the problems of existing Roots blower air inlet dust prevention mechanisms on the market, which suffer from small air inlets, high wind speeds, and the adsorption of dust particles of all sizes onto the dustproof net, causing blockages, affecting the air intake of the Roots blower, and increasing energy consumption. The inventors discovered the following problems with the existing technology during the development of this invention:

[0004] Existing dustproof structures rely on filters that intercept airborne particles through their pores. However, in harsh conditions such as high humidity and high dust levels, the concentration of dust particles in the air is high, and the high humidity can cause the dust particles to stick together, making them more likely to adhere to the filter. This results in frequent cleaning or replacement. Furthermore, the filter itself is a physical obstacle, and even when it is not clogged, airflow is still obstructed when passing through it. The airflow needs to pass through the pores of the filter, which changes the speed and direction of the airflow, preventing it from passing smoothly. This leads to an increase in pressure loss of 10% to 20%, reducing the amount of air that can be drawn in. As a result, it is difficult to achieve both dustproof performance and smooth airflow, thus reducing the efficiency of the fan.

[0005] Therefore, a low-resistance dustproof mechanism for the air inlet duct of a Roots blower is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a low-resistance dustproof mechanism for the air inlet duct of a Roots blower, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a low-resistance dustproof mechanism for the air inlet duct of a Roots blower, comprising a base, a flow-guiding dustproof cavity, a spiral guide vane, and a detachable dust collection box. A motor is installed on the right side of the upper end of the base, and a blower body is installed on the left side of the upper end of the motor. An air inlet is opened at the upper end of the blower body, and a limiting load frame is installed at the center of the air inlet. A fixing rod is installed at the upper end of the limiting load frame. The flow-guiding dustproof cavity is installed at the upper end of the air inlet, and an air inlet mounting plate is installed at the upper end of the flow-guiding dustproof cavity. The spiral guide vane is disposed on the inner surface of the flow-guiding dustproof cavity.

[0008] The flow-guiding dustproof cavity has flow-guiding holes on both sides. The detachable dust collection box is installed at the bottom edge of the flow-guiding dustproof cavity. There are two sets of detachable dust collection boxes. The inner cavity of the detachable dust collection box is provided with a dust collection groove. The inner cavity of the dust collection groove is provided with an air inlet. Silicone gaskets are installed at the upper and lower ends of both sets of detachable dust collection boxes. Handles are provided on both sides of the two sets of detachable dust collection boxes. Impellers are installed on both sides of the inner cavity of the fan body. Drive wheels are installed on both sides of the rear end face of the fan body. Drive wheels are installed on the rear end face of one set of drive wheels. A belt is installed between the output end of the motor and the outer surface of the driven wheel. An air outlet is provided on the left side of the fan body.

[0009] Preferably, the shape of the flow-guiding and dust-proof cavity is gradually expanding, and the spiral flow-guiding vanes are arranged around the inner wall of the flow-guiding and dust-proof cavity.

[0010] Preferably, the limiting load frame is cross-shaped, with its four sides abutting against the inner wall of the air inlet, and the end of the fixing rod away from the limiting load frame connected to the air inlet mounting plate.

[0011] Preferably, the detachable dust collection box is provided in two sets, and the two sets of detachable dust collection boxes are combined into a ring structure.

[0012] Preferably, the impeller is connected to the driving wheel via a rotating shaft, and the driven wheel and the output end of the motor are both meshed with the teeth on the inner surface of the belt.

[0013] Preferably, when the motor drives the belt to rotate, the driven wheel is linked to the driving wheel to rotate.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] 1. Compared with existing technologies, the low-resistance dustproof mechanism for the inlet duct of a Roots blower, through the channel formed by the gradually expanding guide dustproof cavity and the spiral guide vanes, does not require filters or baffles and is not obstructed by physical obstacles, allowing the airflow to maintain a relatively stable speed and direction, thereby greatly reducing airflow resistance. Under the same power input, the blower can draw in more air, making it suitable for harsh working conditions such as high humidity and high dust, and improving the working efficiency of the blower.

[0016] 2. Compared with the existing technology, the low-resistance dustproof mechanism for the air inlet of the Roots blower can separate and transport particulate matter to a detachable dust collection box through the channel formed by the guide dustproof cavity and the spiral guide vanes. It uses the airflow itself to drive the separation process to achieve dynamic self-cleaning, without the need for machine shutdown maintenance. The detachable dust collection box can be quickly pulled out for cleaning, ensuring the continuity of the production process. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the orthographic structure of this utility model.

[0018] Figure 2 This is a three-dimensional structural diagram of the detachable dust collection box of this utility model.

[0019] Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure at point A in the diagram.

[0020] Figure 4 This is a schematic diagram of the rear view of the driven wheel structure of this utility model.

[0021] The attached diagram is labeled as follows: 1. Base; 2. Motor; 3. Fan body; 4. Air inlet; 5. Limiting load frame; 6. Dustproof and flow-guiding cavity; 7. Fixing rod; 8. Air inlet mounting plate; 9. Spiral guide vane; 10. Guide hole; 11. Removable dust collection box; 12. Dust collection trough; 13. Air inlet; 14. Silicone gasket; 15. Handle; 16. Impeller; 17. Drive wheel; 171. Driven wheel; 18. Belt; 19. Air outlet. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0023] As attached Figures 1 to 4The low-resistance dustproof mechanism for the air inlet duct of a Roots blower shown includes a base 1, a flow-guiding dustproof cavity 6, a spiral guide vane 9, and a detachable dust collection box 11. A motor 2 is installed on the right side of the upper end of the base 1, and a blower body 3 is installed on the left side of the upper end of the motor 2. An air inlet 4 is opened at the upper end of the blower body 3. A limit load frame 5 is installed at the center of the air inlet 4, and a fixing rod 7 is installed at the upper end of the limit load frame 5. The flow-guiding dustproof cavity 6 is installed at the upper end of the air inlet 4, and an air inlet mounting plate 8 is installed at the upper end of the flow-guiding dustproof cavity 6. The spiral guide vane 9 is disposed on the inner surface of the flow-guiding dustproof cavity 6.

[0024] The flow-guiding and dust-proof cavity 6 has flow-guiding holes 10 on both sides. The detachable dust collection box 11 is installed at the bottom edge of the flow-guiding and dust-proof cavity 6. There are two sets of detachable dust collection boxes 11. The inner cavity of the detachable dust collection box 11 is provided with a dust collection groove 12. The inner cavity of the dust collection groove 12 is provided with an air inlet 13. The upper and lower ends of the two sets of detachable dust collection boxes 11 are equipped with silicone gaskets 14. The two sets of detachable dust collection boxes 11 are provided with handles 15 on both sides. The inner cavity of the fan body 3 is equipped with impellers 16 on both sides. The rear end face of the fan body 3 is equipped with driving wheels 17 on both sides. The rear end face of one set of driving wheels 17 is equipped with driven wheels 171. The output end of the motor 2 and the outer surface of the driven wheel 171 are equipped with belts 18. The left side of the fan body 3 is provided with an air outlet 19.

[0025] The base 1 provides a stable support foundation for the entire dustproof mechanism, motor 2, and blower body 3. Motor 2, as the power source, provides power to rotate the impeller 16 of the Roots blower. Through belt 18, it drives the driven wheel 171 and the driving wheel 17, causing the impeller 16 to rotate, thus realizing the blower's functions of air extraction and delivery. It is the core component driving the entire blower system. Inside the blower body 3, the impeller 16 rotates under the drive of motor 2, drawing gas in from the inlet 4 and discharging it from the outlet 19, realizing gas delivery and pressurization. The limiting load frame 5 supports and limits the fixed rod 7, ensuring its stable position and thus guaranteeing the secure installation of components such as the guide dustproof cavity 6. It also shares the weight of components such as the guide dustproof cavity 6 to a certain extent, making the entire structure more stable and reliable. The gradually expanding shape of the guide dustproof cavity 6 utilizes fluid dynamics principles at the inlet 4, allowing airflow from a smaller cross-section... As the airflow enters the gradually expanding cavity, the flow area gradually increases, and the airflow speed decreases accordingly. When the airflow speed decreases, large particles of impurities settle naturally. The spiral guide vanes 9 on the inner surface cause the airflow to form a swirling flow, and the centrifugal force throws the particles toward the outer wall of the cavity, achieving dynamic separation and playing a highly efficient dustproof role. The guide holes 10 on both sides ensure that the main airflow channel is unobstructed, and its pressure loss increases by only 2% to 5%, making the pressure loss close to the state without the dustproof device, effectively reducing airflow resistance. The fixing rod 7 connects the limiting load frame 5 and the air inlet mounting plate 8, which serves to fix and support the guide dustproof cavity 6 at the air inlet 4, ensuring the accurate relative position of the guide dustproof cavity 6 and the air inlet 4, and also enhancing the stability of the entire structure. The air inlet mounting plate 8 is installed at the upper end of the guide dustproof cavity 6, providing a flat connection surface for air intake, which is convenient for connection with external air intake pipes and other components, ensuring that the gas can smoothly enter the guide dustproof cavity 6 for processing.

[0026] Spiral guide vanes 9 are installed on the inner surface of the dust-proof and flow-guiding chamber 6, causing the airflow entering the chamber to form a swirling flow. Centrifugal force is used to throw particles in the airflow toward the outer wall of the chamber, achieving efficient dynamic separation and improving the dust-proof effect. The dust collection trough 12 is located inside the removable dust collection box 11. Its inclined design facilitates the sliding of separated particles along the inclined surface into the removable dust collection box 11, achieving effective dust collection, avoiding secondary dust generation, ensuring dust collection effect, and improving the overall performance of the dust-proof mechanism. Silicone gaskets 14 are installed at the upper and lower ends of the two sets of removable dust collection boxes 11, serving a sealing function to prevent dust leakage from the removable dust collection boxes 11 and avoid pollution to the surrounding environment. They also provide a certain degree of shock absorption and buffering, reducing the impact of equipment vibration on the dust collection boxes. The airflow after dust separation enters the fan body 3 through the air inlet 13, and the handle 15 makes it convenient for operators. The detachable dust collection box 11 is disassembled and installed for easy periodic cleaning of the dust inside. The drive wheel 17 is connected to the shaft of the impeller 16, and the driven wheel 171 is connected to the output end of the motor 2 via a belt 18. Together, they form a transmission system that transmits the power output from the motor 2 to the driven wheel 171, thereby driving the drive wheel 17 and the impeller 16 to rotate. The power of the motor 2 is transmitted to the impeller 16, ensuring the stable rotation of the impeller 16 and enabling the normal operation of the fan. Driven by the drive wheel 17, the fan rotates and, through its cooperation with the inner cavity of the fan body 3, draws in gas from the inlet 4 and compresses it to the outlet 19 for discharge, achieving effective gas transport and treatment. The outlet 19 is the channel for gas discharge from the fan body 3. After being pressurized and treated by the impeller 16, the gas is discharged from the outlet 19, providing an outlet for subsequent gas use or discharge. It is an important component of the entire gas transport system. Example 2

[0027] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0028] In a preferred embodiment, the shape of the flow-guiding dustproof cavity 6 is gradually expanding, and the spiral guide vanes 9 are arranged around the inner wall of the flow-guiding dustproof cavity 6. Furthermore, according to the principle of fluid dynamics, when the airflow passes through the flow-guiding dustproof cavity 6, the airflow speed will decrease accordingly. This makes it easier for large particles of impurities to settle naturally due to their own gravity, thereby initially separating some larger dust particles and other impurities, reducing the workload of the subsequent dustproof mechanism. The spiral guide vanes 9 can guide the airflow to form a vortex, making the airflow move in a spiral motion in the cavity. The centrifugal force generated by this vortex motion can throw the particles in the airflow toward the outer wall of the cavity, achieving a finer separation of particles and gas. It can also play a good separation role for smaller particles of impurities, improving dustproof efficiency.

[0029] In a preferred embodiment, the limiting load frame 5 is cross-shaped, with its four sides abutting against the inner wall of the air inlet 4. The end of the fixing rod 7 away from the limiting load frame 5 is connected to the air intake mounting plate 8. Furthermore, the cross-shaped limiting load frame 5 abutting against the inner wall of the air inlet 4 provides lateral support for the entire dustproof mechanism, ensuring the structural stability of the components in the air inlet 4 area and preventing deformation of the air inlet 4 when subjected to airflow impact or other external forces. The fixing rod 7 connects the limiting load frame 5 and the air intake mounting plate 8, forming a stable vertical support structure that firmly fixes the air intake mounting plate 8 in a certain position. This allows components such as the airflow-guiding dustproof cavity 6 to be stably installed above the air inlet 4, ensuring that the entire dustproof mechanism will not shake or shift during operation, thereby ensuring its normal operation.

[0030] In a preferred embodiment, two sets of detachable dust collection boxes 11 are provided, and the two sets of detachable dust collection boxes 11 are combined into a ring structure. Furthermore, the two sets of dust collection boxes forming a ring structure can form a continuous edge dust collection area around the bottom of the airflow dustproof cavity, which greatly increases the dust collection area. This allows the dust and impurities separated from the airflow to be collected more fully, improving the dust collection efficiency and extending the cleaning cycle to 3-6 months, further enhancing the dustproof effect of the entire dustproof mechanism.

[0031] In a preferred embodiment, the impeller 16 is connected to the drive wheel 17 via a rotating shaft. The driven wheel 171 and the output end of the motor 2 are both meshed with the teeth on the inner surface of the belt 18. When the motor 2 drives the belt 18 to rotate, the driven wheel 171 is linked to the drive wheel 17 to rotate. Furthermore, through the meshing connection between the belt 18 and the teeth, the power of the motor 2 can be efficiently transmitted to the driven wheel 171, and then transmitted to the impeller 16 by the drive wheel 17 via the rotating shaft, ensuring that the impeller 16 can rotate at the speed and torque required by the design, thereby enabling the Roots blower to stably generate the required air volume and air pressure.

[0032] The working process of this utility model is as follows: First, the motor 2 is started as a power source and outputs power. The output end of the motor 2 meshes with the teeth on the inner surface of the belt 18. The motor 2 drives the belt 18 to rotate. Since the driven wheel 171 is also meshed with the teeth on the inner surface of the belt 18, the rotation of the belt 18 drives the driven wheel 171 to rotate. The driven wheel 171 is linked to the drive wheel 17 to rotate. The drive wheel 17 is connected to the impeller 16 through the rotating shaft, thereby driving the impeller 16 to rotate. The impeller 16 rotates in the inner cavity of the fan body 3, drawing gas in from the air inlet 4. Under the action of the impeller 16, the gas is pressurized and processed. Then the gas is discharged from the air outlet 19, realizing the functions of gas transportation and pressurization.

[0033] Subsequently, gas enters the dust-proof and flow-guiding chamber 6 from the outside through the air inlet mounting plate 8. The air inlet mounting plate 8 provides a flat connection surface for the air intake, ensuring smooth gas entry. The dust-proof and flow-guiding chamber 6 is gradually expanding. According to the principle of fluid dynamics, when the airflow enters the gradually expanding chamber from a smaller cross-section, the flow area gradually increases, and the airflow velocity decreases accordingly. Large particles of impurities settle more easily due to their own gravity, achieving preliminary separation of dust particles and other impurities. The spiral guide vanes 9 on the inner surface of the dust-proof and flow-guiding chamber 6 cause the airflow to form a swirling flow. The airflow moves in a spiral motion within the chamber, and the resulting centrifugal force throws the particles in the airflow toward the outer wall of the chamber, achieving finer separation of particles and gas, further improving dust-proof efficiency. After the above separation, the dust and other impurities slide down along the inner wall of the dust-proof and flow-guiding chamber 6 under the action of gravity. Since the detachable dust collection box 11 is located at the bottom edge of the dust-proof and flow-guiding chamber 6, and the two sets of detachable dust collection boxes 11 together form a ring structure, they can surround the bottom of the dust-proof and flow-guiding chamber 6. The dust collection area forms a continuous edge dust collection area, so dust and other impurities can fall into the dust collection groove 12 of the detachable dust collection box 11. The inclined design of the dust collection groove 12 makes it easy for the separated particles to slide down the inclined surface into the detachable dust collection box 11, realizing effective dust collection and avoiding secondary dust. The airflow after dust separation enters the fan body 3 through the air inlet 13. The silicone gasket 14 is installed at the upper and lower ends of the two sets of detachable dust collection boxes 11 to play a sealing role and prevent dust leakage from the detachable dust collection box 11. The silicone gasket 14 increases the friction between the air inlet 4 and the guide dustproof cavity 6, thereby achieving a limiting effect. The handle 15 makes it convenient for the operator to move and pull out the detachable dust collection box 11 periodically for disassembly and installation operations, so as to quickly clean the dust in the dust collection box. The guide holes 10 opened on both sides of the guide dustproof cavity 6 can ensure that the main airflow channel is unobstructed, and its pressure loss only increases by 2% to 5%, making the pressure loss close to the state when no dustproof device is added, effectively reducing airflow resistance.

[0034] The limiting load frame 5 is cross-shaped, with both ends abutting against the inner wall of the air inlet 4, providing stable support for the entire dustproof mechanism, ensuring the structural stability of the components in the air inlet 4 area, and preventing the air inlet 4 from deforming when subjected to airflow impact or other external forces. One end of the fixing rod 7 is connected to the limiting load frame 5, and the other end is connected to the air inlet mounting plate 8, forming a stable vertical support structure, which firmly fixes the air inlet mounting plate 8 in a certain position, so that components such as the guide dustproof cavity 6 can be stably installed above the air inlet 4, ensuring that the entire dustproof mechanism will not shake or shift during operation, and ensuring its normal operation. The above is the working principle of a low-resistance dustproof mechanism for the air inlet duct of a Roots blower.

Claims

1. A low-resistance dustproof mechanism for the air inlet duct of a Roots blower, comprising a base (1), a flow-guiding dustproof cavity (6), a spiral flow guide vane (9), and a detachable dust collection box (11), characterized in that: A motor (2) is installed on the right side of the upper end of the base (1), and a fan body (3) is installed on the left side of the upper end of the motor (2). An air inlet (4) is opened at the upper end of the fan body (3). A limit load frame (5) is installed at the center of the air inlet (4). A fixing rod (7) is installed at the upper end of the limit load frame (5). The flow-guiding dustproof cavity (6) is installed at the upper end of the air inlet (4). An air intake mounting plate (8) is installed at the upper end of the flow-guiding dustproof cavity (6). The spiral guide vane (9) is set on the inner surface of the flow-guiding dustproof cavity (6). The flow-guiding dustproof cavity (6) has flow-guiding holes (10) on both sides. The detachable dust collection box (11) is installed at the bottom edge of the flow-guiding dustproof cavity (6). There are two sets of detachable dust collection boxes (11). The inner cavity of the detachable dust collection box (11) is provided with a dust collection groove (12). The inner cavity of the dust collection groove (12) is provided with an air inlet (13). The upper and lower ends of the two sets of detachable dust collection boxes (11) are equipped with silicone gaskets (14). Handles (15) are provided on both sides of the dust collection box (11). Impellers (16) are installed on both sides of the inner cavity of the fan body (3). Drive wheels (17) are installed on both sides of the rear end face of the fan body (3). Drive wheels (171) are installed on the rear end face of one set of drive wheels (17). Belts (18) are installed on the output end of the motor (2) and the outer surface of the driven wheel (171). An air outlet (19) is opened on the left side of the fan body (3).

2. The low-resistance dustproof mechanism for the air inlet duct of a Roots blower according to claim 1, characterized in that: The shape of the flow-guiding dustproof cavity (6) is gradually expanding, and the spiral flow-guiding plate (9) is arranged around the inner wall of the flow-guiding dustproof cavity (6).

3. A low-resistance dustproof mechanism for the air inlet duct of a Roots blower according to claim 1, characterized in that: The limiting load frame (5) is cross-shaped, and the four sides of the limiting load frame (5) abut against the inner wall of the air inlet (4). The end of the fixing rod (7) away from the limiting load frame (5) is connected to the air inlet mounting plate (8).

4. A low-resistance dustproof mechanism for the air inlet duct of a Roots blower according to claim 1, characterized in that: The detachable dust collection box (11) is provided in two sets, and the two sets of detachable dust collection boxes (11) together form a ring structure.

5. A low-resistance dustproof mechanism for the air inlet duct of a Roots blower according to claim 1, characterized in that: The impeller (16) is connected to the driving wheel (17) via a rotating shaft, and the driven wheel (171) and the output end of the motor (2) are both meshed with the teeth on the inner surface of the belt (18).

6. A low-resistance dustproof mechanism for the air inlet duct of a Roots blower according to claim 5, characterized in that: When the motor (2) drives the belt (18) to rotate, the driven wheel (171) is linked to the driving wheel (17) to rotate.

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