Leakage-proof centrifugal fan
By using a leak-proof structure composed of rubber rings in the centrifugal fan, the gap problem caused by impeller displacement is solved, the stability of gas circulation is ensured, and the leakage-proof effect is achieved.
Patent Information
- Application Number
- CN202420839098.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-22
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-22
AI Technical Summary
Existing centrifugal fans are prone to radial jumping and axial displacement when the impeller rotates, resulting in a gap between the impeller and the housing. The air inlet gas directly enters the flue or returns to the air inlet without accelerating through the impeller, disturbing the gas circulation.
A leak-proof centrifugal fan is designed, and an anti-leakage structure composed of the first and second rubber rings is used. The rubber ring is pressed and fitted between the impeller and the cover plate, and has elasticity to adapt to the displacement of the impeller and prevent wind from entering from the gap.
It effectively avoids gas circulation disturbances caused by the gap between the impeller and the shell, ensures that the gas is discharged smoothly after accelerating through the impeller, and improves the stability of gas circulation.
Smart Images
Figure CN222746266U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of centrifugal fans, in particular to a leakage-proof centrifugal fan. Background Art
[0002] A centrifugal fan is a machine that relies on input mechanical energy to increase gas pressure and discharge the gas. It is a driven fluid machine that works based on the principle of converting kinetic energy into potential energy. It uses a high-speed rotating impeller to accelerate the gas, then slow it down and change the flow direction, converting kinetic energy into potential energy. Centrifugal fans are widely used in ventilation, dust removal and cooling in factories, mines, tunnels, cooling towers, vehicles, ships and buildings.
[0003] When using current centrifugal fans, workers often find that due to radial runout and axial displacement of the impeller during rotation, there will be gaps between the impeller and the casing. These gaps will cause the inlet gas to directly enter the flue without being accelerated by the impeller, or return to the inlet through the gap after being accelerated by the impeller, thereby disrupting the gas circulation. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a leakage-proof centrifugal fan.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a leakage-proof centrifugal fan, comprising a shell, an impeller is rotatably connected in the shell, an air outlet is opened on the shell, an air inlet is opened on the shell, a cover plate is provided on the shell, a motor is fixedly connected to the shell, an output shaft of the motor is fixedly connected to the impeller, an anti-leakage structure is provided on the impeller, the anti-leakage structure is mainly composed of a first rubber ring, the first rubber ring is fixedly connected to the impeller, and a second rubber ring is fixedly connected to the cover plate.
[0006] The effect achieved by the above components is: the cover plate and the shell are installed, the motor is started, and the output shaft of the motor drives the impeller to rotate, so that the wind is sucked in from the air inlet and blown out from the air outlet through the impeller. When the shell and the cover plate are installed, the first rubber ring and the second rubber ring are squeezed and fitted together. When the impeller is axially displaced, the first rubber ring is squeezed toward the second rubber ring, or the first rubber ring is moved away from the second rubber ring. Since the first rubber ring and the second rubber ring are both elastic, when the axial displacement occurs, the first rubber ring and the first rubber ring are still fitted together, but the degree of extrusion is different. When the impeller has radial runout, although the first rubber ring and the second rubber ring are not completely fitted, there is still a fitted part, which can prevent the wind from entering from the gap, thereby avoiding the gap between the impeller and the shell, and these gaps will cause the air inlet gas to directly enter the flue without being accelerated by the impeller or return to the air inlet from the gap after being accelerated by the impeller, thereby disturbing the gas circulation.
[0007] Preferably, the first rubber ring is provided with four sliding blocks, the sliding blocks are provided with card slots, and the second rubber ring is fixedly connected with four card blocks, the card blocks are adapted to the card slots in size.
[0008] The effect achieved by the above components is that when the first rubber ring and the second rubber ring are connected, the four clamping blocks can be respectively clamped into the corresponding clamping grooves, so that the connection between the first rubber ring and the second rubber ring is more stable.
[0009] Preferably, four giving way blocks are fixedly connected to the first rubber ring, and the giving way blocks are provided with giving way grooves, and the giving way grooves are slidably connected to the sliding block.
[0010] The effect achieved by the above components is that when the impeller undergoes radial displacement, the slider will slide in the clearance groove to prevent affecting the device effect.
[0011] Preferably, first springs are fixedly connected to inner walls on both sides of the clearance groove, respectively, and one end of the first spring is fixedly connected to the sliding block.
[0012] The effect achieved by the above components is that when the slider slides, it squeezes one first spring and stretches the other first spring. When the radial displacement ends, the slider is reset under the action of the rebound elastic force of the two first springs.
[0013] Preferably, a mounting structure is provided on the shell, and the mounting structure is mainly composed of a mounting block, and the mounting block is fixedly connected to the cover plate, and the mounting block is adapted to the size of the air inlet.
[0014] The effect achieved by the above components is that the installation block is inserted into the air inlet, so that the cover plate can be quickly installed.
[0015] Preferably, four connecting grooves are formed on the shell, and four connecting columns are fixedly connected to the cover plate, and the connecting columns are adapted in size to the connecting grooves.
[0016] The effect achieved by the above components is that when installing the cover plate, the four connecting posts are respectively inserted into the corresponding connecting grooves, which can make the installation more stable.
[0017] Preferably, four circular grooves are formed on the mounting block, a telescopic rod is fixedly connected in the circular groove, a round ball is fixedly connected to one end of the telescopic rod, and four limiting grooves are formed on the inner wall of the air inlet.
[0018] The effect achieved by the above components is: after the cover plate is installed, the four telescopic rods are stretched so that the round balls are respectively inserted into the corresponding limit grooves, which can improve the stability of the installation.
[0019] Preferably, a second spring is sleeved on the telescopic rod, one end of the second spring is fixedly connected to the round ball, and the other end of the second spring is fixedly connected to the inner wall of the circular groove.
[0020] The effect achieved by the above components is: when the round ball is squeezed and shrinks into the round groove, the second spring is in a contracted state. Therefore, in the process of inserting the installation block into the air inlet, when the round ball contacts the limit groove, the round ball is inserted into the limit groove under the action of the rebound force of the second spring, making the installation operation more convenient.
[0021] Compared with the prior art, the advantages and positive effects of the utility model are that, in the utility model, by providing an anti-leakage structure, when the housing and the cover plate are installed, the first rubber ring and the second rubber ring are squeezed and fitted together, and when the impeller undergoes axial displacement, the first rubber ring is squeezed toward the second rubber ring, or the first rubber ring is moved in a direction away from the second rubber ring. Since the first rubber ring and the second rubber ring are both elastic, when axial displacement occurs, the first rubber ring and the first rubber ring are still fitted together, but the degree of extrusion is different. When the impeller undergoes radial runout, although the first rubber ring and the second rubber ring are not completely fitted together, there is still a fitted portion, which can prevent wind from entering through the gap When entering and connecting the first rubber ring and the second rubber ring, the four blocks can be respectively inserted into the corresponding slots, so that the connection between the first rubber ring and the second rubber ring is more stable. When the impeller undergoes radial displacement, the slider will slide in the give way slot to prevent affecting the device effect. When the slider slides, it will squeeze one first spring and stretch the other first spring. When the radial displacement is completed, the slider will reset under the action of the rebound elastic force of the two first springs, thereby avoiding the situation where there is a gap between the impeller and the housing. These gaps will cause the inlet gas to directly enter the flue without being accelerated by the impeller or return to the air inlet from the gap after being accelerated by the impeller, thereby disturbing the gas circulation. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A three-dimensional structural schematic diagram of a leakage-proof centrifugal fan is proposed for the utility model;
[0023] Figure 2 A three-dimensional structural schematic diagram of another perspective of a leakage-proof centrifugal fan proposed by the utility model;
[0024] Figure 3 A partial schematic diagram of an anti-leakage structure of an anti-leakage centrifugal fan proposed by the utility model;
[0025] Figure 4 The utility model provides a partial schematic diagram of an installation structure of a leakage-proof centrifugal fan.
[0026] Legend: 1. Shell; 2. Impeller; 3. Air outlet; 4. Air inlet; 5. Cover plate; 6. Motor; 7. Anti-leakage structure; 71. First rubber ring; 72. Second rubber ring; 73. Displacement block; 74. Displacement groove; 75. Slider; 76. Block; 77. Slot; 78. First spring; 8. Mounting structure; 81. Mounting block; 82. Connecting column; 83. Connecting groove; 84. Round groove; 85. Telescopic rod; 86. Round ball; 87. Limiting groove; 88. Second spring. DETAILED DESCRIPTION
[0027] Embodiment 1, as Figure 1 and Figure 3 As shown, a leakage-proof centrifugal fan includes a shell 1, an impeller 2 is rotatably connected to the shell 1, an air outlet 3 is opened on the shell 1, an air inlet 4 is opened on the shell 1, a cover plate 5 is arranged on the shell 1, a motor 6 is fixedly connected to the shell 1, and the output shaft of the motor 6 is fixedly connected to the impeller 2.
[0028] Reference Figure 2 and Figure 3, an anti-leakage structure 7 is provided on the impeller 2, and the anti-leakage structure 7 is mainly composed of a first rubber ring 71, the first rubber ring 71 is fixedly connected to the impeller 2, and a second rubber ring 72 is fixedly connected to the cover plate 5. The cover plate 5 is installed with the housing 1, and the motor 6 is started. The output shaft of the motor 6 drives the impeller 2 to rotate, and the wind is sucked in from the air inlet 4 and blown out from the air outlet 3 through the impeller 2. When the housing 1 and the cover plate 5 are installed, the first rubber ring 71 and the second rubber ring 72 will be squeezed and fitted together. When the impeller 2 is axially displaced, the first rubber ring 71 will be squeezed toward the second rubber ring 72. The first rubber ring 71 moves away from the second rubber ring 72, or the first rubber ring 71 moves away from the second rubber ring 72. Since the first rubber ring 71 and the second rubber ring 72 are both elastic, when the axial displacement occurs, the first rubber ring 71 and the first rubber ring 71 are still fitted together, but the degree of extrusion is different. When the impeller 2 radially jumps, the first rubber ring 71 and the second rubber ring 72 are not completely fitted together, but there is still a fitted part, which can prevent wind from entering through the gap, thereby avoiding the gap between the impeller 2 and the housing 1, and these gaps will cause the gas at the air inlet 4 to not pass through The air flow is disturbed by the impeller 2 directly entering the flue or returning to the air inlet 4 from the gap after being accelerated by the impeller 2. The first rubber ring 71 is provided with four sliders 75, and the slider 75 is provided with a card slot 77. The second rubber ring 72 is fixedly connected with four card blocks 76. The card blocks 76 are adapted in size to the card slots 77. When the first rubber ring 71 and the second rubber ring 72 are connected, the four card blocks 76 can be respectively inserted into the corresponding card slots 77, so that the connection between the first rubber ring 71 and the second rubber ring 72 is more stable. There are four give way blocks 73, and the give way blocks 73 are provided with give way grooves 74. The give way grooves 74 are slidably connected to the slider 75. When the impeller 2 undergoes radial displacement, the slider 75 will slide in the give way grooves 74 to prevent affecting the device effect. First springs 78 are fixedly connected to the inner walls on both sides of the give way grooves 74, and one end of the first spring 78 is fixedly connected to the slider 75. When the slider 75 slides, it will squeeze one first spring 78 and stretch the other first spring 78. When the radial displacement is completed, the slider 75 will be reset under the action of the rebound elastic force of the two first springs 78.
[0029] Reference Figure 2-4The shell 1 is provided with a mounting structure 8, which is mainly composed of a mounting block 81, which is fixedly connected to the cover plate 5, and the mounting block 81 is adapted to the size of the air inlet 4. The mounting block 81 is inserted into the air inlet 4 to achieve quick installation of the cover plate 5. Four connecting grooves 83 are provided on the shell 1, and four connecting columns 82 are fixedly connected to the cover plate 5. The size of the connecting column 82 is adapted to the size of the connecting groove 83. When installing the cover plate 5, the four connecting columns 82 are respectively inserted into the corresponding connecting grooves 83, which can make the installation more stable. Four circular grooves 84 are provided on the mounting block 81, and a telescopic rod 85 is fixedly connected to the circular groove 84. A round bead 86 is fixedly connected to one end of the telescopic rod 85. The air inlet Four limiting grooves 87 are provided on the inner wall of 4. After the cover plate 5 is installed, the four telescopic rods 85 are stretched so that the balls 86 are respectively stuck in the corresponding limiting grooves 87, which can improve the stability of the installation. A second spring 88 is sleeved on the telescopic rod 85, one end of the second spring 88 is fixedly connected to the balls 86, and the other end of the second spring 88 is fixedly connected to the inner wall of the circular groove 84. When the balls 86 are squeezed and contracted into the circular groove 84, the second spring 88 is in a contracted state. Therefore, in the process of inserting the mounting block 81 into the air inlet 4, when the balls 86 contact the limiting groove 87, the balls 86 are stuck in the limiting groove 87 under the action of the rebound elastic force of the second spring 88, making the installation operation more convenient.
[0030] Working principle: install the cover plate 5 and the housing 1, start the motor 6, and the output shaft of the motor 6 drives the impeller 2 to rotate, so that the wind is sucked in from the air inlet 4 and blown out from the air outlet 3 through the impeller 2. When the housing 1 and the cover plate 5 are installed, the first rubber ring 71 and the second rubber ring 72 are squeezed and fitted together. When the impeller 2 is axially displaced, the first rubber ring 71 is squeezed toward the second rubber ring 72, or the first rubber ring 71 moves away from the second rubber ring 72. Since the first rubber ring 71 and the second rubber ring 72 are both elastic, when the axial displacement occurs, the first rubber ring 71 is pressed toward the second rubber ring 72, or the first rubber ring 71 moves away from the second rubber ring 72. When the impeller 2 is radially jumped, the first rubber ring 71 and the second rubber ring 72 are not completely in contact with each other, but there is still a contact part between them, which can prevent wind from entering through the gap, thereby avoiding the situation that there is a gap between the impeller 2 and the shell 1, and these gaps will cause the gas at the air inlet 4 to directly enter the flue without being accelerated by the impeller 2 or return to the air inlet 4 through the gap after being accelerated by the impeller 2, thereby disturbing the gas flow. When the second rubber ring 72 is in place, the four card blocks 76 can be respectively inserted into the corresponding card grooves 77, so that the connection between the first rubber ring 71 and the second rubber ring 72 is more stable. When the impeller 2 undergoes radial displacement, the slider 75 will slide in the give way groove 74 to prevent affecting the device effect. When the slider 75 slides, it will squeeze one first spring 78 and stretch the other first spring 78. When the radial displacement is completed, the slider 75 will reset under the action of the rebound elastic force of the two first springs 78, and the mounting block 81 will be inserted into the air inlet 4, so that the cover plate 5 can be quickly installed. When installing the cover 5, the four connecting columns 82 are respectively inserted into the corresponding connecting grooves 83 to make the installation more stable. After the cover 5 is installed, the four telescopic rods 85 are stretched so that the round balls 86 are respectively stuck in the corresponding limit grooves 87 to improve the stability of the installation. When the round balls 86 are squeezed and contracted into the round grooves 84, the second spring 88 is in a contracted state. Therefore, in the process of inserting the installation block 81 into the air inlet 4, when the round balls 86 contact the limit grooves 87, the round balls 86 are stuck in the limit grooves 87 under the action of the rebound elastic force of the second spring 88, making the installation operation more convenient.
[0031] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.
Claims
1. A leakage-proof centrifugal fan, comprising a housing (1), characterized in that: An impeller (2) is rotatably connected in the housing (1), an air outlet (3) is provided on the housing (1), an air inlet (4) is provided on the housing (1), a cover plate (5) is provided on the housing (1), a motor (6) is fixedly connected to the housing (1), an output shaft of the motor (6) is fixedly connected to the impeller (2), an anti-leakage structure (7) is provided on the impeller (2), the anti-leakage structure (7) mainly consists of a first rubber ring (71), the first rubber ring (71) is fixedly connected to the impeller (2), and a second rubber ring (72) is fixedly connected to the cover plate (5).
2. The anti-leakage centrifugal fan according to claim 1, characterized in that: The first rubber ring (71) is provided with four sliders (75), the sliders (75) are provided with card slots (77), and the second rubber ring (72) is fixedly connected with four card blocks (76), the card blocks (76) are adapted in size to the card slots (77).
3. The anti-leakage centrifugal fan according to claim 2, characterized in that: Four clearance blocks (73) are fixedly connected to the first rubber ring (71), and the clearance blocks (73) are provided with clearance grooves (74), and the clearance grooves (74) are slidably connected to the slider (75).
4. The anti-leakage centrifugal fan according to claim 3, characterized in that: First springs (78) are fixedly connected to the inner walls on both sides of the clearance groove (74), and one end of the first spring (78) is fixedly connected to the sliding block (75).
5. The anti-leakage centrifugal fan according to claim 4, characterized in that: The housing (1) is provided with a mounting structure (8), the mounting structure (8) mainly consisting of a mounting block (81), the mounting block (81) being fixedly connected to the cover plate (5), the mounting block (81) being adapted in size to the air inlet (4).
6. The anti-leakage centrifugal fan according to claim 5, characterized in that: The shell (1) is provided with four connection grooves (83), and the cover plate (5) is fixedly connected with four connection pillars (82), and the connection pillars (82) are matched in size to the connection grooves (83).
7. The anti-leakage centrifugal fan according to claim 6, characterized in that: The mounting block (81) is provided with four circular grooves (84), a telescopic rod (85) is fixedly connected in the circular groove (84), a round ball (86) is fixedly connected to one end of the telescopic rod (85), and four limiting grooves (87) are provided on the inner wall of the air inlet (4).
8. The anti-leakage centrifugal fan according to claim 7, characterized in that: A second spring (88) is sleeved on the telescopic rod (85), one end of the second spring (88) is fixedly connected to the round ball (86), and the other end of the second spring (88) is fixedly connected to the inner wall of the circular groove (84).