Roots blower with impeller protection device
By installing contact sensors on the wall panel and housing of the Roots blower, detecting impeller shaking and controlling shutdown, the problem of impeller collision with the equipment is solved, and the equipment protection and life extension are achieved.
Patent Information
- Application Number
- CN202422256742.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-14
AI Technical Summary
During operation of the Roots blower, the impeller and the wall panel and the inner surface of the shell are prone to collision, resulting in equipment damage, increasing maintenance costs and reducing service life.
The contact sensor is installed on the wall panel and housing of the Roots blower. The induction contacts at the front end of the sensor maintain a certain gap between the end surface and the reinforcement surface of the impeller. The blower is controlled to stop when the impeller shakes through the sensor to avoid collision.
Effectively avoid collision between impellers and wall panels and shells, reduce maintenance costs, and extend the service life of the equipment.
Smart Images
Figure CN223089538U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a Roots blower, in particular to a Roots blower with an impeller protection device. Background Art
[0002] A Roots blower is a positive displacement blower, which has the characteristics of good sealing, stable operation, low noise, large air output, energy saving, etc. It is widely used in industries such as chemical industry, water treatment, printing, textile, and construction. There are two meshing impellers inside it, and the two meshing impellers rotate relative to each other to complete the gas transportation process.
[0003] During the operation of the blower, when the impellers rotate at high speed, the blower inevitably has a small amplitude of vibration. Under the long-term vibration of the blower, the two impellers inevitably have a small amplitude of sway. Due to the small gaps between the two end faces of the impellers and the inner surface of the wall plate, and the small gaps between the rib surfaces of the two impellers and the inner surface of the middle shell, the two impellers are very likely to collide with the inner surface of the wall plate and the middle shell, resulting in varying degrees of damage to the impellers, wall plates, and shells of the blower, increasing the maintenance cost and reducing the service life of the blower. Summary of the Utility Model
[0004] In view of the above technical problems, the utility model provides a Roots blower with an impeller protection device. In this Roots blower with an impeller protection device, contact sensors are respectively installed on the wall plate and the shell. The induction contacts at the front ends of the contact sensors protrude beyond the inner surfaces of the wall plate and the shell. There is a certain gap between the induction contacts at the front ends of the contact sensors and the end faces and rib surfaces of the impellers. When the impellers rotate normally, the end faces, rib surfaces of the impellers and the induction contacts do not contact each other. When the impellers sway, the end faces and rib surfaces of the impellers touch the induction contacts at the front ends of the contact sensors. At this time, through the signal wires on the contact sensors, the blower is controlled to stop, avoiding the impellers from colliding with the inner surfaces of the wall plate and the middle shell, resulting in varying degrees of damage to the impellers, wall plates, and shells of the blower, reducing the maintenance cost and extending the service life of the blower.
[0005] To this end, the technical solution of the utility model is that a Roots blower with an impeller protection device is provided with a blower housing, and the blower housing includes a middle shell and wall plates. The wall plates are respectively located at both ends of the middle shell, and an accommodation chamber is formed inside the middle shell and the two wall plates;
[0006] A driving impeller shaft and a driven impeller shaft are respectively arranged inside the blower housing. A driving impeller and a driven impeller are respectively arranged on the driving impeller shaft and the driven impeller shaft, and the driving impeller and the driven impeller rotate meshingly with each other;
[0007] A plurality of through holes are provided at the circumferential position of the middle housing, and contact sensors are respectively fixed in the plurality of through holes. The sensing portions at the front ends of the plurality of contact sensors are respectively close to the rib surface positions of the driving impeller and the driven impeller;
[0008] A plurality of through holes are respectively provided at the axially inner ends of the two wall plates, and contact sensors are respectively fixed in the plurality of through holes. The sensing portions at the front ends of the plurality of contact sensors are respectively close to the end face positions of the driving impeller and the driven impeller;
[0009] The frontmost position of the sensing portion of the contact sensor is located inside the accommodation chamber.
[0010] Preferably, the plurality of through holes at the circumferential position of the middle housing are respectively located at positions of the middle housing close to both axial ends, and the sensing portions at the front ends of the contact sensors in the plurality of through holes are respectively close to the positions on both sides of the rib surfaces of the driving impeller and the driven impeller.
[0011] Preferably, the contact sensor and the middle housing are fixed by welding;
[0012] The contact sensor and the wall plate are fixed by welding.
[0013] Preferably, the contact sensor is provided with an external thread, and the inside of the through hole in the middle housing is provided with an internal thread. The contact sensor and the middle housing are fixed and locked by threads;
[0014] The inside of the through hole in the wall plate is provided with an internal thread, and the contact sensor and the wall plate are fixed and locked by threads.
[0015] Preferably, the contact sensor includes an outer housing. A through hole penetrating along the length direction of the outer housing is provided inside the outer housing. An insulating fixing column is provided in the through hole inside the outer housing. The insulating fixing column and the outer housing are detachably connected. A through hole penetrating along the length direction of the insulating fixing column is provided inside the insulating fixing column. An induction contact is fixed at the front end position of the through hole inside the insulating fixing column. The induction contact and the insulating fixing column are detachably connected. The frontmost position of the induction contact exceeds the frontmost position of the outer housing;
[0016] A positive wire is fixedly connected to the induction contact, and a groove is provided at the rear end portion of the outer housing. A negative wire is fixedly connected in the groove.
[0017] Preferably, the insulating fixing post consists of a front supporting section of the insulating fixing post and a rear connecting section of the insulating fixing post. The front supporting section of the insulating fixing post is located at the front end position of the insulating fixing post, and the rear connecting section of the insulating fixing post is located at the rear end position of the insulating fixing post. The outer diameter dimension of the front supporting section of the insulating fixing post is larger than the dimension of the rear connecting section of the insulating fixing post. The front supporting section of the insulating fixing post is located at the outer position of the front end of the outer housing. There is a shoulder between the front supporting section of the insulating fixing post and the rear connecting section of the insulating fixing post. The shoulder is axially fixedly connected to the front end of the outer housing, and the outer circumference of the rear connecting section of the insulating fixing post is detachably connected to the inner circumference of the outer housing.
[0018] Preferably, a chamfer is provided at the connection between the inner circumferential surface of the through hole inside the insulating fixing post and the rear end face of the insulating fixing post;
[0019] A chamfer is provided at the connection between the groove at the rear end of the outer housing and the rear end face of the outer housing.
[0020] Preferably, an external thread is provided on the outer circumference of the rear connecting section of the insulating fixing post, and an internal thread is provided on the inner surface of the through hole on the outer housing. The rear connecting section of the insulating fixing post and the outer housing are fixedly locked by threads;
[0021] An external thread is provided on the outer circumference of the induction contact, and an internal thread is provided on the inner surface of the through hole on the insulating fixing post. The induction contact and the insulating fixing post are fixedly locked by threads.
[0022] Preferably, an external thread is provided on the outer circumference of the outer housing. The front position of the external thread extends to the outermost front position of the outer housing, and the rear position of the external thread extends to a position close to the rearmost end of the outer housing;
[0023] A locking nut is threadedly connected to the external thread.
[0024] Preferably, the number of locking nuts is two.
[0025] The beneficial effect of the present utility model is that for the Roots blower with an impeller protection device, by respectively installing contact sensors on the wall panel and the housing, the induction contacts at the front ends of the contact sensors extend beyond the inner surfaces of the wall panel and the housing. There is a certain gap between the induction contacts at the front ends of the contact sensors and the end face and rib face of the impeller. When the impeller rotates normally, the end face, rib face of the impeller and the induction contacts do not contact each other. When the impeller shakes, the end face and rib face of the impeller touch the induction contacts at the front ends of the contact sensors. At this time, through the signal line on the contact sensor, the blower is controlled to stop, avoiding the impeller from colliding with the inner surfaces of the wall panel and the intermediate housing, resulting in varying degrees of damage to the impeller, wall panel, and housing of the blower, reducing the maintenance cost, and extending the service life of the blower. Description of the Drawings
[0026] Figure 1Is a perspective view of the present utility model;
[0027] Figure 2 Is another perspective view of the present utility model;
[0028] Figure 3 Is the front view of the present utility model;
[0029] Figure 4 Is the present utility model Figure 3 A - A cross - sectional view in;
[0030] Figure 5 Is the present utility model Figure 4 An enlarged view at position B in;
[0031] Figure 6 Is the present utility model Figure 4 An enlarged view at position C in;
[0032] Figure 7 Is a perspective view of the contact sensor in the present utility model;
[0033] Figure 8 Is another perspective view of the contact sensor in the present utility model;
[0034] Figure 9 Is the front view of the contact sensor in the present utility model;
[0035] Figure 10 Is the present utility model Figure 9 D - D cross - sectional view in;
[0036] Figure 11 Is a perspective view of the insulating fixing column in the present utility model;
[0037] Figure 12 Is the present utility model Figure 10 An enlarged view at position E in.
[0038] Explanation of symbols in the figure:
[0039] 1. Intermediate housing; 2. Wall panel; 3. Contact sensor; 301. Outer housing; 302. Positive wire; 303. Inductive contact; 304. Locking nut; 306. Insulating fixing column; 30601. Front support section of insulating fixing column; 30602. Rear connection section of insulating fixing column; 307. Negative wire; 308. External thread; 4. Driving impeller shaft; 5. Driven impeller shaft; 6. Driving impeller; 7. Driven impeller; 8. Blower housing; 9. Accommodation chamber; 10. Shoulder; 11. Chamfer. Specific embodiments
[0040] The present utility model will be further described below in conjunction with embodiments.
[0041] Through Figures 1 - 12It can be seen that the Roots blower with an impeller protection device is provided with a blower housing 8. The blower housing 8 includes an intermediate housing 1 and wall plates 2. The wall plates 2 are respectively located at both ends of the intermediate housing 1. An accommodation chamber 9 is formed inside the intermediate housing 1 and the two wall plates 2.
[0042] An active impeller shaft 4 and a driven impeller shaft 5 are respectively arranged inside the blower housing 8. An active impeller 6 and a driven impeller 7 are respectively arranged on the active impeller shaft 4 and the driven impeller shaft 5. The active impeller 6 and the driven impeller 7 are meshed with each other. When the blower operates, the active impeller 6 and the driven impeller 7 mesh and rotate with each other to complete the gas transmission process.
[0043] A plurality of through holes are provided at the circumferential position of the intermediate housing 1. Contact sensors 3 are respectively fixed in the plurality of through holes. The sensing parts at the front ends of the plurality of contact sensors 3 are respectively close to the rib surface positions of the active impeller 6 and the driven impeller 7.
[0044] A plurality of through holes are respectively provided at the axially inner ends of the two wall plates 2. Contact sensors 3 are respectively fixed in the plurality of through holes. The sensing parts at the front ends of the plurality of contact sensors 3 are respectively close to the end face positions of the active impeller 6 and the driven impeller 7. The frontmost position of the sensing part of the contact sensor 3 is located inside the accommodation chamber 9.
[0045] The contact sensor 3 is signal-connected to the blower power supply through positive and negative wires. During the high-speed meshing rotation of the active impeller 6 and the driven impeller 7, when the active impeller 6 and the driven impeller 7 shake or are displaced, after the rib or end positions of the active impeller 6 and the driven impeller 7 touch the front sensing part of the contact sensor 3, the contact sensor 3 immediately controls the cut-off of the blower power supply, and the blower stops operating, avoiding the continuous high-speed rotation of the active impeller 6 and the driven impeller 7 in the shaking or displaced state, which may cause damage to the impellers themselves, the blower housing, and the wall plates.
[0046] The plurality of through holes at the circumferential position of the intermediate housing 1 are respectively located at the positions of the intermediate housing 1 close to both axial ends. The sensing parts at the front ends of the contact sensors 3 in the plurality of through holes are respectively close to the positions on both sides of the rib surfaces of the active impeller 6 and the driven impeller 7.
[0047] By arranging the contact sensor 3 at the positions of the intermediate housing 1 close to both axial ends, it is possible to protect both sides of the impeller rib surface at the same time. When any side of the impeller shakes or is displaced, it can be timely protected by the contact sensor 3.
[0048] The contact sensor 3 is fixed to the intermediate housing 1 by welding, and the contact sensor 3 is fixed to the wall plate 2 by welding.
[0049] Fixed by welding, the stability of the fixation between the contact sensor 3 and the intermediate housing 1 and between the contact sensor 3 and the wall panel 2 can be ensured, preventing the contact sensor 3 from shifting in position due to the shaking generated during the operation of the blower when the blower is running.
[0050] The outside of the contact sensor 3 is provided with an external thread, and the inside of the through hole in the intermediate housing 1 is provided with an internal thread. The contact sensor 3 and the intermediate housing 1 are fixed and locked by threads.
[0051] The inside of the through hole in the wall panel 2 is provided with an internal thread. The contact sensor 3 and the wall panel 2 are fixed and locked by threads.
[0052] By fixing and locking with threads, the quick disassembly and assembly of the contact sensor 3 can be achieved. Moreover, when the induction part at the front end of the contact sensor 3 is repeatedly rubbed by the impeller, the gap between the front end of the induction part and the rib surface or end surface of the impeller will become larger. At this time, the contact sensor 3 can be rotated to move it inward, so that the induction part at the front end of the contact sensor 3 continuously maintains an appropriate gap with the rib surface or end surface of the impeller.
[0053] The contact sensor 3 includes a housing 301. There is a through hole running through the housing 301 along the length direction of the housing 301. An insulating fixing column 306 is arranged in the through hole inside the housing 301. The insulating fixing column 306 and the housing 301 are detachably connected, which can achieve the quick disassembly and assembly of the insulating fixing column 306 and the housing 301, facilitating the repair and replacement of the insulating fixing column 306 or the housing 301.
[0054] The inside of the insulating fixing column 306 is provided with a through hole running through the insulating fixing column 306 along the length direction. An induction contact 303 is fixedly arranged at the front end position of the through hole inside the insulating fixing column 306. The induction contact 303 and the insulating fixing column 306 are detachably connected, which can achieve the quick disassembly and assembly of the induction contact 303 and the insulating fixing column 306, facilitating the repair and replacement of the induction contact 303 or the insulating fixing column 306.
[0055] The frontmost position of the induction contact 303 extends beyond the frontmost position of the housing 301. This structural design can, on the premise of ensuring that the front end of the induction contact 303 can normally contact the impeller, avoid the impeller from knocking against the insulating fixing column 306.
[0056] A positive wire 302 is fixedly connected to the induction contact 303. A groove is provided at the rear end of the outer housing 301, and a negative wire 307 is fixedly connected inside the groove. The other ends of the positive wire 302 and the negative wire 307 are electrically connected to the power supply of the blower. When the active impeller 6 and the driven impeller 7 shake or are displaced, after the rib or end positions of the active impeller 6 and the driven impeller 7 touch the induction contact 303, the contact sensor 3 immediately controls the power supply of the blower to be cut off, and the blower stops running, preventing the active impeller 6 and the driven impeller 7 from continuously rotating at high speed in the state of shaking or displacement, which may cause damage to the impellers themselves, the blower housing, and the wall panels.
[0057] The insulating fixing column 306 is composed of an insulating fixing column front support section 30601 and an insulating fixing column rear connection section 30602. The insulating fixing column front support section 30601 is located at the front end of the insulating fixing column 306, and the insulating fixing column rear connection section 30602 is located at the rear end of the insulating fixing column 306. The outer diameter of the insulating fixing column front support section 30601 is larger than the size of the insulating fixing column rear connection section 30602. The insulating fixing column front support section 30601 is located outside the front end of the outer housing 301. A shoulder 10 is provided between the insulating fixing column front support section 30601 and the insulating fixing column rear connection section 30602, and the shoulder 10 is axially fixedly connected to the front end of the outer housing 301, so as to achieve both axial locking and radial locking between the insulating fixing column 306 and the outer housing 301, further increasing the connection stability between the insulating fixing column 306 and the outer housing 301.
[0058] The outer circumference of the insulating fixing column rear connection section 30602 is detachably connected to the inner circumference of the outer housing 301.
[0059] A chamfer 11 is provided at the connection between the inner circumferential surface of the through hole inside the insulating fixing column 306 and the rear end face of the insulating fixing column 306, and a chamfer 11 is provided at the connection between the groove at the rear end of the outer housing 301 and the rear end face of the outer housing 301.
[0060] The two chamfers 11 can effectively prevent the contact positions of the positive and negative wires with the insulating fixing column rear connection section 30602 and the outer housing 301 from being damaged by creases or even broken when the positive and negative wires shake frequently, affecting the normal use of the contact sensor 3.
[0061] The outer circumference of the insulating fixing column rear connection section 30602 is provided with an external thread, and the inner surface of the through hole on the outer housing 301 is provided with an internal thread. The insulating fixing column rear connection section 30602 and the outer housing 301 are fixedly locked by threads, which can realize the quick disassembly and assembly of the insulating fixing column 306 and the outer housing 301, facilitating the repair and replacement of the insulating fixing column 306 or the outer housing 301.
[0062] The outer circumference of the induction contact 303 is provided with an external thread, and the inner surface of the through hole on the insulating fixing column 306 is provided with an internal thread. The induction contact 303 and the insulating fixing column 306 are fixed by thread locking, which can realize the quick disassembly and assembly of the induction contact 303 and the insulating fixing column 306, and is convenient for the maintenance and replacement of the induction contact 303 or the insulating fixing column 306.
[0063] The outer circumference of the outer housing 301 is provided with an external thread 308, and a locking nut 304 is threadedly connected to the external thread 308.
[0064] When the contact sensor 3 is screwed into the intermediate housing 1 or the wall panel 2 through threads, the locking nut 304 is used to lock the outer surface of the intermediate housing 1 or the wall panel 2, so as to realize the mutual locking and fixing among the outer housing 301, the locking nut 304, the intermediate housing 1 or the outer housing 301, the locking nut 304, and the wall panel 2, and ensure the stability of the installation of the contact sensor 3.
[0065] The number of the locking nuts 304 is two. When locking, the two locking nuts 304 are locked with each other, which can further increase the stability of the installation of the contact sensor 3 and avoid the situation that the contact sensor 3 shakes, loosens or even falls off.
[0066] The rear end position of the external thread 308 is located near the rear end face position of the outer housing 301. If the external thread 308 penetrates the entire circumferential surface of the outer housing 301, the locking nut 304 is very easy to fall off from the rear end of the outer housing 301. Therefore, a part of the area without threads is reserved at the rear end face position of the outer housing 301.
[0067] For the Roots blower with an impeller protection device, by respectively installing contact sensors on the wall panel and the housing, the induction contacts at the front end of the contact sensors extend beyond the inner surfaces of the wall panel and the housing, and there is a certain gap between the induction contacts at the front end of the contact sensors and the end face and rib surface of the impeller. When the impeller rotates normally, the end face, rib surface and induction contacts of the impeller do not contact each other. When the impeller shakes, the end face and rib surface of the impeller touch the induction contacts at the front end of the contact sensors. At this time, through the signal line on the contact sensor, the blower is controlled to stop, avoiding the collision between the impeller and the inner surfaces of the wall panel and the intermediate housing, resulting in different degrees of damage to the impeller, wall panel and housing of the blower, reducing the maintenance cost and prolonging the service life of the blower.
[0068] However, the above are only specific embodiments of the present invention, and the scope of implementation of the present invention cannot be limited thereby. Therefore, the replacement of equivalent components or the equivalent changes and modifications made according to the scope of patent protection of the present invention should still fall within the scope covered by the claims of the present invention.
Claims
1. A Roots blower with an impeller protection device, characterized in that: There is a blower housing, which includes an intermediate housing and wall plates. The wall plates are respectively located at both ends of the intermediate housing, and an accommodation chamber is formed inside the intermediate housing and the two wall plates; An active impeller shaft and a driven impeller shaft are respectively arranged inside the blower housing. An active impeller and a driven impeller are respectively arranged on the active impeller shaft and the driven impeller shaft, and the active impeller and the driven impeller mesh and rotate with each other; A plurality of through holes are provided at the circumferential position of the intermediate housing. Contact sensors are respectively fixed in the plurality of through holes. The sensing parts at the front ends of the plurality of contact sensors are respectively close to the rib surface positions of the active impeller and the driven impeller; A plurality of through holes are respectively provided at the axially inner ends of the two wall plates. Contact sensors are respectively fixed in the plurality of through holes. The sensing parts at the front ends of the plurality of contact sensors are respectively close to the end face positions of the active impeller and the driven impeller; The foremost position of the sensing part of the contact sensor is located inside the accommodation chamber.
2. The Roots blower with an impeller protection device according to claim 1, characterized in that: The plurality of through holes at the circumferential position of the intermediate housing are respectively located at positions of the intermediate housing close to both axial ends, and the sensing parts at the front ends of the contact sensors in the plurality of through holes are respectively close to the positions on both sides of the ribs of the active impeller and the driven impeller; 3. The Roots blower with an impeller protection device according to any one of claims 1 or 2, characterized in that: The contact sensor and the intermediate housing are fixed by welding; The contact sensor and the wall plate are fixed by welding.
4. The Roots blower with an impeller protection device according to any one of claims 1 or 2, characterized in that: The contact sensor is externally provided with an external thread, and the internal thread is provided in the through hole of the intermediate housing. The contact sensor and the intermediate housing are fixed and locked by threads; The internal thread is provided in the through hole of the wall plate. The contact sensor and the wall plate are fixed and locked by threads.
5. The Roots blower with an impeller protection device according to claim 4, characterized in that: The contact sensor includes a housing body. A through hole running through the housing body along the length direction of the housing body is provided inside the housing body. An insulating fixing column is provided in the through hole inside the housing body. The insulating fixing column and the housing body are detachably connected. A through hole running through the insulating fixing column along the length direction of the insulating fixing column is provided inside the insulating fixing column. An induction contact is fixed at the front end position of the through hole inside the insulating fixing column. The induction contact and the insulating fixing column are detachably connected. The foremost position of the induction contact extends beyond the foremost position of the housing body; A positive electrode wire is fixedly connected to the induction contact, and a groove is provided at the rear end of the housing body. A negative electrode wire is fixedly connected in the groove.
6. The Roots blower with an impeller protection device according to claim 5, wherein: The insulating fixed column is composed of a front support section of the insulating fixed column and a rear connection section of the insulating fixed column. The front support section of the insulating fixed column is located at the front end position of the insulating fixed column, and the rear connection section of the insulating fixed column is located at the rear end position of the insulating fixed column. The outer diameter dimension of the front support section of the insulating fixed column is larger than the dimension of the rear connection section of the insulating fixed column. The front support section of the insulating fixed column is located at the external position of the front end of the outer housing. A shoulder is provided between the front support section of the insulating fixed column and the rear connection section of the insulating fixed column. The shoulder is axially fixedly connected to the front end portion of the outer housing. The outer circumference of the rear connection section of the insulating fixed column is detachably connected to the inner circumference of the outer housing.
7. The Roots blower with an impeller protection device according to claim 5, characterized in that: A chamfer is provided at the connection between the inner circumferential surface of the through hole inside the insulating fixed column and the rear end face of the insulating fixed column; A chamfer is provided at the connection between the groove at the rear end portion of the outer housing and the rear end face of the outer housing.
8. The Roots blower with an impeller protection device according to claim 6, wherein: External threads are provided on the outer circumference of the rear connection section of the insulating fixed column, and internal threads are provided on the inner surface of the through hole on the outer housing. The rear connection section of the insulating fixed column and the outer housing are fixedly locked through threads; External threads are provided on the outer circumference of the induction contact, and internal threads are provided on the inner surface of the through hole on the insulating fixed column. The induction contact and the insulating fixed column are fixedly locked through threads.
9. The Roots blower with an impeller protection device according to claim 5, characterized in that: External threads are provided on the outer circumference of the outer housing. The front end position of the external threads extends to the foremost end position of the outer housing, and the rear end position of the external threads extends to a position close to the rearmost end position of the outer housing; A locking nut is threadedly connected to the external threads.
10. The Roots blower with an impeller protection device according to claim 9, characterized in that: The number of the locking nuts is two.