Heat dissipation structure for rotor of centrifugal blower
By designing a heat dissipation structure combining first-stage air inlet, air outlet and cooling through-hole on the centrifugal blower rotor, the problem of low heat dissipation efficiency in the prior art is solved, and efficient heat dissipation and stable operation are achieved.
Patent Information
- Application Number
- CN202422320361.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-24
AI Technical Summary
The existing heat dissipation structure increases the heat dissipation air volume on the rotor surface through impeller leakage or air-cooled impeller, resulting in additional aerodynamic power being distributed and occupying the main engine power. The rotor design is restricted by air bearings, and excessive weight causes overload of the air bearing and reduces the heat dissipation efficiency.
A heat dissipation structure including a rotor body, a balance sleeve and a dust shield is designed. Through a first-stage air inlet, an air outlet and a cooling through hole, the rotor heat is taken away by air pressure flow, and the air flow contact area is increased through the spiral guide groove, and the dust shield and limit retaining ring are combined to improve the installation accuracy and dust protection effect.
It improves the heat dissipation efficiency of the rotor surface, reduces the vibration of the rotor, ensures the correct cooperation between the rotor and the components, avoids dust blocking the cooling through holes, and improves the operating stability and efficiency of the centrifugal blower.
Smart Images
Figure CN223190704U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heat dissipation structures, in particular to a heat dissipation structure for a centrifugal blower rotor. Background Art
[0002] As a new generation of air supply and pressure fans in industries such as sewage treatment, aquaculture, and papermaking, air-floating fans have advantages that traditional fans do not have, such as energy saving, stability, and low noise. However, air-floating centrifugal fans use permanent magnet synchronous motors, and during use, the rotor will generate a lot of heat due to eddy currents. This problem may lead to performance degradation at the least, and even rotor demagnetization at the worst. The existing heat dissipation structure, during use, usually increases the heat dissipation volume of the rotor surface by leaking gas after passing through the impeller or adding an air-cooled impeller, and reduces the temperature of the rotor and air-floating bearings by air cooling. This heat dissipation structure requires an additional part of the pneumatics to ensure the heat dissipation of the rotor regardless of the surface air cooling, which occupies the power of the main machine. The rotor design is restricted by the air bearing. Excessive weight will cause the air bearing to overload, resulting in reduced heat dissipation efficiency. Therefore, we propose a heat dissipation structure for centrifugal blower rotors to solve the above problems. Utility Model Content
[0003] In order to overcome the existing heat dissipation structure, during use, it is usually necessary to increase the heat dissipation air volume on the rotor surface by leaking the gas after passing through the impeller or adding an air-cooled impeller, and reduce the temperature of the rotor and the air-floating bearing by air cooling. This heat dissipation structure requires an additional part of the pneumatics to ensure the heat dissipation of the rotor regardless of the surface air cooling, which occupies the power of the main machine. The rotor design is restricted by the air bearing. Excessive weight will cause the air bearing to be overloaded, resulting in reduced heat dissipation efficiency.
[0004] The technical solution of the utility model is: a heat dissipation structure for a centrifugal blower rotor, comprising a rotor body, a balancing sleeve and a dust cover; the rotor body comprises a main shaft, a first-stage end shaft and a second-stage end shaft, the middle section of the main shaft is provided with a balancing sleeve for improving the balance of the rotor body, a first-stage rotating shaft is provided with a first-stage air inlet hole, and the first-stage air inlet hole is provided with a dust cover for blocking dust.
[0005] Preferably, the heat dissipation ring groove increases the surface area of the rotor body when the rotor body rotates at high speed, thereby increasing the contact opportunity with the air and facilitating the dissipation of heat from the surface of the rotor body. The combination of the first-level air inlet, the air outlet and the cooling through-hole makes it possible for the air to flow from the high-pressure area of the first-level air inlet to the low-pressure area of the air outlet under the influence of pressure when the centrifugal blower is running, and then takes away the heat of the rotor body axis through the cooling through-hole. The combination of multiple groups of spiral guide grooves makes it possible for the airflow to guide the airflow entering the cooling through-hole when the airflow passes through the multiple groups of spiral guide grooves. At the same time, the multiple groups of spiral guide grooves increase the contact area between the inner wall of the cooling through-hole and the airflow, which facilitates the removal of more heat from the rotor body. The installation of the ring groove allows the staff to install the dust cover on the inner wall of the first-level air inlet to prevent dust from entering the cooling through-hole. The chamfering allows the staff to help with positioning when installing the rotor body, thereby improving the installation accuracy and ensuring that the rotor body is correctly matched with other components.
[0006] Preferably, the first-stage end shaft and the second-stage end shaft are respectively located at the two ends of the main shaft, and an annular heat dissipation groove for dispersing the heat of the main shaft is opened in the middle section of the main shaft, a cooling through-hole is opened in the center of the main shaft, a first-stage air inlet is opened in the center of the first-stage end shaft, and an air outlet is opened in the center of the second-stage end shaft. The heat dissipation annular groove increases the surface area of the rotor body when the rotor body rotates at high speed, thereby increasing the contact opportunity with the air and facilitating the dissipation of heat from the surface of the rotor body. The first-stage air inlet, air outlet and cooling through-hole are combined, so that when the centrifugal blower is running, the air will flow from the high-pressure area of the first-stage air inlet to the low-pressure area of the air outlet under the influence of pressure, and then take away the heat of the rotor body axis through the cooling through-hole.
[0007] Preferably, the first-level air inlet, air outlet and cooling through-hole are connected in sequence, and a spiral guide groove is provided on the inner wall of the cooling through-hole. There are multiple groups of spiral guide grooves, and the multiple groups of spiral guide grooves are arranged around the inner wall of the cooling through-hole. By combining the multiple groups of spiral guide grooves, the spiral guide grooves can guide the airflow entering the cooling through-hole when the airflow passes through the multiple groups of spiral guide grooves. At the same time, the multiple groups of spiral guide grooves increase the contact area between the inner wall of the cooling through-hole and the airflow, so as to take away more heat from the rotor body.
[0008] Preferably, the inner wall of the first-stage air inlet hole is provided with an installation ring groove for installing the dust cover, and the outer end edges of the main shaft, the first-stage end shaft and the second-stage end shaft are all provided with chamfers. The installation ring groove allows the staff to install the dust cover on the inner wall of the first-stage air inlet hole, which plays a role in blocking dust from entering the cooling through hole. The chamfer can help the staff to position the rotor body when installing it, improve the installation accuracy, and ensure that the rotor body is correctly matched with other components.
[0009] Preferably, the balancing sleeve includes a sleeve and a limit ring, a first-level sleeve hole is opened in the center of the sleeve, and the sleeve is sleeved on the outer end of the heat dissipation ring groove through the first-level sleeve hole. The sleeve is combined with the heat dissipation ring groove, so that the heat dissipation ring groove in the middle section of the main shaft promotes the heat generated by the rotation of the rotor body to be transferred outward through the heat dissipation ring groove. The sleeve can compensate for the imbalance of the rotor body mass after the heat dissipation ring groove is opened, thereby reducing the vibration of the rotor body and improving the stability of the rotor body operation.
[0010] Preferably, two groups of limit retaining rings are provided, and the two groups of limit retaining rings are respectively located at the two ends of the sleeve. The centers of the two groups of limit retaining rings are provided with secondary sleeve holes. The two groups of limit retaining rings are sleeved on the outside of the two ends of the annular heat dissipation groove through the secondary sleeve holes. By combining the two groups of limit retaining rings, the two groups of limit retaining rings can fix the sleeve at the outer end of the heat dissipation ring groove, thereby playing a limiting role.
[0011] Preferably, the dust cover includes a mounting clamp and a bamboo charcoal adsorption strip, the mounting clamp is matched with the mounting ring groove, and a plurality of groups of bamboo charcoal adsorption strips are arranged around the inside of the mounting clamp, and a secondary air inlet hole is opened between the plurality of groups of bamboo charcoal adsorption strips. By combining the bamboo charcoal adsorption strips with the secondary air inlet hole, when the airflow enters the primary air inlet hole, the bamboo charcoal adsorption strips can adsorb tiny dust in the air, and the plurality of groups of bamboo charcoal adsorption strips can block larger floating debris in the air, so that pure air can enter the cooling through hole through the secondary air inlet hole, thereby preventing dust and debris in the air from blocking the cooling through hole and reducing the heat dissipation effect.
[0012] Beneficial effects of the utility model:
[0013] 1. The heat dissipation ring groove increases the surface area of the rotor body when it rotates at high speed, thereby increasing the contact opportunity with the air and facilitating the dissipation of heat from the surface of the rotor body. The combination of the first-level air inlet, the air outlet and the cooling through-hole makes it possible for the air to flow from the high-pressure area of the first-level air inlet to the low-pressure area of the air outlet under the influence of pressure when the centrifugal blower is running, and then takes away the heat of the rotor body axis through the cooling through-hole. The combination of multiple sets of spiral guide grooves makes it possible for the airflow to guide the airflow entering the cooling through-hole when the airflow passes through the multiple sets of spiral guide grooves. At the same time, the multiple sets of spiral guide grooves increase the contact area between the inner wall of the cooling through-hole and the airflow, which facilitates the removal of more heat from the rotor body. The installation of the ring groove allows the staff to install the dust cover on the inner wall of the first-level air inlet to prevent dust from entering the cooling through-hole. The chamfering allows the staff to help with positioning when installing the rotor body, improves the installation accuracy, and ensures that the rotor body is correctly matched with other components.
[0014] By combining the sleeve and the heat dissipation ring groove, the heat dissipation ring groove in the middle section of the main shaft promotes the heat generated by the rotation of the rotor body to be transferred outward through the heat dissipation ring groove. The sleeve can compensate for the imbalance of the rotor body mass after the heat dissipation ring groove is opened, thereby reducing the vibration of the rotor body and improving the stability of the rotor body operation. By combining the two sets of limit retaining rings, the two sets of limit retaining rings can fix the sleeve at the outer end of the heat dissipation ring groove to play a limiting role. By combining the bamboo charcoal adsorption strip with the secondary air inlet hole, the bamboo charcoal adsorption strip can adsorb tiny dust in the air when the airflow enters the primary air inlet hole, and block the larger dust in the air through multiple sets of bamboo charcoal adsorption strips. Large floating debris allows pure air to enter the cooling holes through the secondary air inlet, thereby preventing dust and debris in the air from blocking the cooling holes and reducing the heat dissipation effect, solving the existing heat dissipation structure. During use, the gas is usually leaked after passing through the impeller or an air-cooled impeller is added to increase the heat dissipation air volume on the rotor surface, and the temperature of the rotor and the air-floating bearing is reduced by air cooling. This heat dissipation structure requires an additional part of the pneumatics to ensure the heat dissipation of the rotor regardless of the surface air cooling, which occupies the power of the main engine. The rotor design is restricted by the air bearing. Excessive weight will cause the air bearing to overload, resulting in reduced heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the rotor body of the present utility model;
[0017] Figure 3 This is a schematic diagram of the rotor body of the present invention from another angle;
[0018] Figure 4 This is a schematic diagram of a balancing sleeve of the present utility model;
[0019] Figure 5 This is a schematic diagram of the dust cover of the present utility model.
[0020] Explanation of the accompanying drawings: 1. Rotor body; 101. Main shaft; 102. Primary end shaft; 103. Secondary end shaft; 104. Air outlet; 105. Annular heat dissipation groove; 106. Primary air inlet; 107. Mounting ring groove; 108. Cooling through hole; 109. Spiral guide groove; 2. Balancing sleeve; 201. Sleeve; 202. Primary sleeve hole; 203. Limiting ring; 204. Secondary sleeve hole; 3. Dust cover; 301. Mounting clamp; 302. Bamboo charcoal adsorption strip; 303. Secondary air inlet. DETAILED DESCRIPTION
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0022] See also Figure 1-2 The utility model provides an embodiment: a heat dissipation structure for a centrifugal blower rotor, comprising a rotor body 1, a balancing sleeve 2 and a dust cover 3; the rotor body 1 comprises a main shaft 101, a primary end shaft 102 and a secondary end shaft 103, the middle section of the main shaft 101 is provided with a balancing sleeve 2 for improving the balance of the rotor body 1, a primary air inlet 106 is opened inside the primary rotating shaft, and a dust cover 3 for blocking dust is provided inside the primary air inlet 106.
[0023] See also Figure 1-3 In this embodiment, the first-stage end shaft 102 and the second-stage end shaft 103 are respectively located at the two ends of the main shaft 101. The middle section of the main shaft 101 is provided with an annular heat dissipation groove 105 for dispersing the heat of the main shaft 101. A cooling through-hole 108 is provided at the center of the main shaft 101. A first-stage air inlet hole 106 is provided at the center of the first-stage end shaft 102. An air outlet hole 104 is provided at the center of the second-stage end shaft 103. The heat dissipation annular groove increases the surface area of the rotor body 1 when the rotor body 1 rotates at high speed, thereby increasing the contact opportunity with the air and facilitating the dissipation of the heat on the surface of the rotor body 1. The combination of the first-stage air inlet hole 106, the air outlet hole 104 and the cooling through-hole 108 makes it possible for the air to be discharged from the first-stage air inlet hole 106 under the influence of pressure when the centrifugal blower is running. 6 flows toward the low-pressure area of the air outlet hole 104, and then takes away the axial heat of the rotor body 1 through the cooling through hole 108. The first-level air inlet hole 106, the air outlet hole 104 and the cooling through hole 108 are connected in sequence. The inner wall of the cooling through hole 108 is fitted with a spiral guide groove 109. There are multiple groups of spiral guide grooves 109, and the multiple groups of spiral guide grooves 109 are arranged around the inner wall of the cooling through hole 108. By combining the multiple groups of spiral guide grooves 109, when the airflow passes through the multiple groups of spiral guide grooves 109, the spiral guide grooves 109 can guide the airflow entering the cooling through hole 108. At the same time, the multiple groups of spiral guide grooves 109 increase the contact area between the inner wall of the cooling through hole 108 and the airflow, so as to take away more heat from the rotor body 1.
[0024] See also Figure 1-4In this embodiment, the inner wall of the first-stage air inlet hole 106 is provided with an installation ring groove 107 for installing the dust cover 3. The outer edge of the main shaft 101, the first-stage end shaft 102 and the second-stage end shaft 103 are all provided with chamfers. The installation ring groove 107 allows the staff to install the dust cover 3 on the inner wall of the first-stage air inlet hole 106 to prevent dust from entering the cooling through hole 108. The chamfer can help the staff to position the rotor body 1 when installing it, improve the installation accuracy, and ensure that the rotor body 1 is aligned with other components. The balancing sleeve 2 is accurately matched, and includes a sleeve 201 and a limit ring 203. A first-level sleeve hole 202 is opened in the center of the sleeve 201, and the sleeve 201 is sleeved on the outer end of the heat dissipation ring groove through the first-level sleeve hole 202. The sleeve 201 is combined with the heat dissipation ring groove, so that the heat dissipation ring groove in the middle section of the main shaft 101 promotes the heat generated by the rotation of the rotor body 1 to be transferred outward through the heat dissipation ring groove. The sleeve 201 can compensate for the imbalance of the rotor body 1 caused by the opening of the heat dissipation ring groove, thereby reducing the vibration of the rotor body 1 and improving the stability of the operation of the rotor body 1.
[0025] See also Figure 1-5 In this embodiment, two groups of limit retaining rings 203 are provided. The two groups of limit retaining rings 203 are respectively located at the two ends of the sleeve 201. The centers of the two groups of limit retaining rings 203 are provided with secondary sleeve holes 204. The two groups of limit retaining rings 203 are sleeved on the outer sides of the two ends of the annular heat dissipation groove 105 through the secondary sleeve holes 204. The two groups of limit retaining rings 203 are combined to make the two groups of limit retaining rings 203 able to fix the sleeve 201 at the outer end of the heat dissipation ring groove to play a limiting role. The dust cover 3 includes a mounting clamp 301 and a bamboo charcoal adsorption strip 302. The mounting clamp 301 is matched with the mounting ring groove 107. A plurality of groups of bamboo charcoal adsorption strips 302 are arranged around the interior of the mounting collar 301, and secondary air inlet holes 303 are opened between the plurality of groups of bamboo charcoal adsorption strips 302. By combining the bamboo charcoal adsorption strips 302 with the secondary air inlet holes 303, when the airflow enters the primary air inlet hole 106, the bamboo charcoal adsorption strips 302 can adsorb tiny dust in the air, and the plurality of groups of bamboo charcoal adsorption strips 302 block larger floating debris in the air, so that pure air can enter the cooling through-hole 108 through the secondary air inlet hole 303, thereby preventing dust and debris in the air from blocking the cooling through-hole 108 and reducing the heat dissipation effect.
[0026] During operation, when the centrifugal blower is running, the external cooling air will flow from the high-pressure area of the first-level air inlet 106 to the low-pressure area of the air outlet 104 under the influence of pressure, and then take away the axial heat of the rotor body 1 through the cooling through hole 108. When the air flow passes through the cooling through hole 108, the multiple groups of spiral guide grooves 109 on the inner wall of the cooling through hole 108 can guide the air flow entering the cooling through hole 108. At the same time, the multiple groups of spiral guide grooves 109 increase the contact area between the inner wall of the cooling through hole 108 and the cooling air flow, thereby taking away more heat from the rotor body 1.
[0027] At the same time, the heat dissipation ring groove increases the surface area of the rotor body 1 when the rotor body 1 rotates at high speed, thereby increasing the contact opportunity with the air and facilitating the dissipation of heat on the surface of the rotor body 1.
[0028] When the cooling airflow enters the first-level air inlet 106, the bamboo charcoal adsorption strips 302 can adsorb the tiny dust in the air, and through multiple groups of bamboo charcoal adsorption strips 302, block the larger floating debris in the air, so that pure air can enter the cooling through hole 108 through the secondary air inlet 303, thereby preventing dust and debris in the air from blocking the cooling through hole 108 and reducing the heat dissipation effect.
[0029] According to the above steps, when the centrifugal blower is running, the external cooling air will flow from the high-pressure area of the first-stage air inlet 106 to the low-pressure area of the air outlet 104 under the influence of pressure, and then take away the axial heat of the rotor body 1 through the cooling through hole 108. The heat dissipation ring groove increases the surface area of the rotor body 1 when the rotor body 1 rotates at high speed, thereby increasing the contact opportunity with the air and facilitating the dissipation of heat from the surface of the rotor body 1.
[0030] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.
Claims
1. A heat dissipation structure for a centrifugal blower rotor, comprising a rotor body (1); characterized in that: The invention also includes a balancing sleeve (2) and a dust cover (3); the rotor body (1) includes a main shaft (101), a first-stage end shaft (102) and a second-stage end shaft (103); the middle section of the main shaft (101) is provided with a balancing sleeve (2) for improving the balance of the rotor body (1); a first-stage air inlet (106) is provided inside the first-stage rotating shaft; and a dust cover (3) for blocking dust is provided inside the first-stage air inlet (106).
2. The heat dissipation structure for a centrifugal blower rotor according to claim 1, characterized in that: The primary end shaft (102) and the secondary end shaft (103) are respectively located at the two ends of the main shaft (101); a ring-shaped heat dissipation groove (105) for dispersing the heat of the main shaft (101) is provided in the middle section of the main shaft (101); a cooling through hole (108) is provided in the center of the main shaft (101); an air inlet is provided in the center of the primary end shaft (102); and an air outlet (104) is provided in the center of the secondary end shaft (103).
3. The heat dissipation structure for a centrifugal blower rotor according to claim 2, characterized in that: The air inlet, the air outlet (104) and the cooling through hole (108) are connected in sequence, and the inner wall of the cooling through hole (108) is provided with a spiral guide groove (109), and the spiral guide grooves (109) are provided in multiple groups, and the multiple groups of spiral guide grooves (109) are provided around the inner wall of the cooling through hole (108).
4. The heat dissipation structure for a centrifugal blower rotor according to claim 3, characterized in that: The inner wall of the air inlet is provided with a mounting ring groove (107) for mounting the dust cover (3), and the outer end edges of the main shaft (101), the first-stage end shaft (102) and the second-stage end shaft (103) are all provided with chamfers.
5. The heat dissipation structure for a centrifugal blower rotor according to claim 2, characterized in that: The balancing sleeve (2) comprises a sleeve (201) and a limiting retaining ring (203); a first-level sleeve hole (202) is provided at the center of the sleeve (201); and the sleeve (201) is sleeved on the outer end of the heat dissipation ring groove through the first-level sleeve hole (202).
6. The heat dissipation structure for a centrifugal blower rotor according to claim 5, characterized in that: Two groups of limit retaining rings (203) are provided. The two groups of limit retaining rings (203) are respectively located at the two ends of the sleeve (201). The centers of the two groups of limit retaining rings (203) are both provided with secondary sleeve holes (204). The two groups of limit retaining rings (203) are sleeved on the outer sides of the two ends of the annular heat dissipation groove (105) through the secondary sleeve holes (204).
7. The heat dissipation structure for a centrifugal blower rotor according to claim 4, characterized in that: The dust shield (3) comprises a mounting collar (301) and bamboo charcoal adsorption strips (302). The mounting collar (301) is matched and engaged with the mounting ring groove (107). A plurality of groups of bamboo charcoal adsorption strips (302) are arranged around the interior of the mounting collar (301). Secondary air inlet holes (303) are provided between the plurality of groups of bamboo charcoal adsorption strips (302).