A direct-drive flexible suspended rotor dust sampling pump

Abstract

This invention belongs to the field of dust sampling technology, specifically a direct-connected flexible suspended rotor dust sampling pump. The dust sampling pump includes: a motor with an output shaft; a rotor connected to the output shaft via a connecting component; wherein the connecting component includes at least one driving rib (13) on the output shaft or the rotor, and at least one rib groove on the rotor or the output shaft, wherein the driving rib (13) can be accommodated in the rib groove. Without changing the technical specifications of the prior art, this invention reduces the overall weight of the pump body by about 10%, greatly reducing its volume and weight, and providing a substantial improvement basis for the lightweighting and miniaturization of dust samplers.

Description

Technical Field

[0001] This invention relates to the field of smoke and dust sampling technology, specifically to a direct-connected flexible suspended rotor smoke and dust sampling pump. Background Technology

[0002] Currently, due to the limitations of the sampling environment, most waste gas sampling from stationary pollution sources uses portable instruments. The ultimate optimization goal for portable instruments is to minimize their weight without compromising sampling quality. The rotary vane pump used for sampling, due to the specific requirements for sampling flow rate, represents the biggest challenge in reducing the overall weight of the instrument.

[0003] like Figure 6-8 The prior art shown (rotary vane pump for dust sampling):

[0004] Among them, reference Figure 6 As shown: from front to back, it includes front bearing 1, front cover 2, cylinder 3, rotor 4, rear cover 5, rear bearing 6, and motor 7. This technology reduces the weight of the rotary vane pump to some extent, but the weight reduction of the rotary vane pump using this method is still limited.

[0005] At the same time, refer to Figure 6 and Figure 7 In the existing technology, the rotor 4 of the rotary vane sampling pump is fixedly assembled. The two ends are connected by bearings in the front and rear end covers, and the clearance is manually adjusted to achieve free rotation in the cylinder 2. This method is difficult to assemble, time-consuming and labor-intensive. Moreover, the bearing chambers in the front end cover 2 and the rear end cover 5 need to be machined. This method has a relatively complex processing technology and high manufacturing cost.

[0006] Therefore, a direct-connected flexible suspended rotor dust sampling pump was invented. Summary of the Invention

[0007] In view of the problems existing in the above and / or the existing direct-drive flexible suspended rotor dust sampling pump, the present invention is proposed.

[0008] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0009] A direct-drive flexible suspended rotor dust sampling pump includes:

[0010] An electric motor, wherein an output shaft is provided on the electric motor;

[0011] A rotor, which is drivenly connected to the output shaft via a connecting assembly;

[0012] The connecting component includes at least one drive rib disposed on the output shaft or the rotor, and at least one rib groove disposed on the rotor or the output shaft, wherein the drive rib can be accommodated in the rib groove.

[0013] In some possible implementations, the drive ribs protrude from the outer side wall of the output shaft or the inner side wall of the rotor.

[0014] In some possible implementations, the drive ribs are two in number and symmetrically distributed on both sides of the output shaft or on both sides of the rotor.

[0015] In some possible implementations, wedge-shaped limiting surfaces are formed at both ends of the driving rib, and the length of the rib groove is greater than the length of the driving rib.

[0016] In some possible implementations, the groove is located in the middle of the output shaft or rotor, and one end of the groove is connected to a wedge-shaped guide surface that extends to the end of the output shaft or rotor.

[0017] In some possible implementations, the smoke sampling pump further includes:

[0018] A special end cap is provided on the motor, and the special end cap is provided with a small threaded connection hole and a large threaded connection hole.

[0019] In some possible implementations, the smoke sampling pump further includes:

[0020] The rear end cover has a first small through hole and a first large through hole on its inner wall;

[0021] The cylinder has a second small through hole and a second large through hole at the rear end of the cylinder body, and a third large through hole at the front end of the cylinder body. The rotor is disposed in the inner cavity of the cylinder.

[0022] The rear end cap mates with the rear end of the cylinder body of the special end cap, and is connected to the small threaded connection hole by screws passing through the second small through hole and the first small through hole in sequence to achieve a tight connection.

[0023] In some possible implementations, the smoke sampling pump further includes:

[0024] The front cover has a fourth large through hole on its inner wall;

[0025] The front end cover mates with the front end of the cylinder body, and is connected to the large threaded connection hole by screws passing through the fourth large through hole, the third large through hole, the second large through hole and the first large through hole in sequence, so as to achieve a tight connection.

[0026] In some possible implementations, the front end cover has a first gap with the front end of the cylinder body, and the rear end cover has a second gap with the rear end of the cylinder body.

[0027] In some possible implementations, the rotor is made of a graphene composite formulation to improve its strength and stability.

[0028] Compared with existing technologies:

[0029] 1. Without changing the technical specifications of the prior art, the present invention reduces the overall weight of the pump body by about 10%, greatly reducing its volume and weight, and providing a substantial improvement basis for the lightweighting and miniaturization of dust samplers.

[0030] 2. Without changing the technical specifications of the prior art, the present invention eliminates the press-fitting of bearings in both the front and rear covers, eliminates the need to process bearing chambers, and eliminates the need for manual adjustment of clearances. The overall processing and assembly time is reduced by about 30%, which greatly reduces production costs and improves production efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the exploded structure of the present invention;

[0032] Figure 2 This is a front view of the cross-sectional structure of the present invention;

[0033] Figure 3 This is a schematic diagram of the rotor structure of the present invention;

[0034] Figure 4 This is a cross-sectional schematic diagram of the rotor of the present invention;

[0035] Figure 5 This is a schematic diagram of the output shaft of the present invention;

[0036] Figure 6 This is a schematic diagram of an explosive structure in existing technology;

[0037] Figure 7 A frontal view of the existing technical structure;

[0038] Figure 8 This is a schematic diagram of a rotor structure in the prior art.

[0039] In the figure: motor 10, special end cover 11, output shaft 12, drive rib 13, wedge-shaped limiting surface 14, rear end cover 20, rotor 30, rib groove 31, wedge-shaped guide surface 32, cylinder 40, front end cover 50, first gap 61, second gap 62. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0041] This invention provides a direct-drive flexible suspended rotor dust sampling pump. Please refer to [link / reference]. Figures 1-5 The dust sampling pump includes: a motor 10, a rotor 30, a connecting assembly for adjusting the gap of the rotor 30, a special end cover 11, a rear end cover 20, a cylinder 40, and a front end cover 50.

[0042] The output end of the motor 10 is provided with an output shaft 12, which can drive the output shaft 12 to rotate. The rotor 30 is sleeved on the output shaft 12 through a connecting assembly to realize transmission. The connecting assembly includes at least one drive rib 13 disposed on the output shaft 12 or the rotor 30, and at least one rib groove 31 disposed on the rotor 30 or the output shaft 12. The drive rib 13 can be accommodated in the rib groove 31. The output shaft 12 drives the rotor 30 to rotate through the cooperation of the drive rib 13 and the rib groove 31. There is also a certain gap between the drive rib 13 and the rib groove 31, so that the rotor 30 can move relative to the output shaft 12. Thus, the rotor 30 is in a flexible suspension state during operation and can self-adjust the gap. This technical solution eliminates the front and rear bearings in the original technology and does not require manual adjustment of the gap, thereby achieving the purpose of reducing weight and size, and making processing and assembly simpler and more convenient.

[0043] Among some possible implementation methods, refer to Figures 3 to 5 As shown, the drive rib 13 protrudes from the outer side wall of the output shaft 12 or the inner side wall of the rotor 30, while the rib groove 31 is correspondingly recessed from the outer side wall of the drive rib 13 or the inner side wall of the rotor 30. During installation, the rotor 30 is sleeved on the output shaft 12, and the drive rib 13 is correspondingly accommodated in the rib groove 31. When the output shaft 12 rotates, the power is transmitted through the side wall of the drive rib 13 abutting against the side wall of the rib groove 31, thereby driving the rotor 30 to rotate.

[0044] Among some possible implementation methods, refer to Figures 3 to 5 As shown, there are two drive ribs 13, and the two drive ribs 13 are symmetrically distributed on both sides of the output shaft 12 or the rotor 30. The purpose is to ensure that the rotor 30 can move relative to the output shaft 12 in the radial direction, thereby realizing that the rotor 30 is in a flexible suspension state during operation, so as to self-adjust the gap. In this embodiment, the movement of the rotor 30 relative to the output shaft 12 refers to the radial movement. At this time, the height dimension of the drive rib 13 should be less than the depth dimension of the rib groove 31.

[0045] Among some possible implementation methods, refer to Figure 5As shown, wedge-shaped limiting surfaces 14 are formed at both the front and rear ends of the drive rib 13. The length dimension of the rib groove 31 is greater than the length dimension of the drive rib 13. During operation, the rotor 30 can move relative to the output shaft 12 along the axial direction to adjust the gap between the front and rear ends of the automatic adjustment rotor 30. During the adjustment process, the wedge-shaped limiting surface 14 will abut against the end face of the rib groove 31, thereby restricting the rotor 30 from continuing to move axially, so as to avoid the problem of the rotor 30 dislodging from the output shaft 12. In this embodiment, the movement of the rotor 30 relative to the output shaft 12 refers to the axial movement. In some applications, the self-adjustment of the rotor 30 relative to the output shaft 12 usually includes both radial and axial adjustment. In this case, the height dimension of the drive rib 13 is required to be less than the depth dimension of the rib groove 31, and the length dimension of the drive rib 13 is less than the length dimension of the rib groove 31.

[0046] In some possible implementations, the rib groove 31 is located in the middle of the output shaft 12 or the rotor 30, and one end of the rib groove 31 is connected to a wedge-shaped guide surface 32. The purpose is to facilitate the accurate insertion or wedging of the drive rib 13 into the rib groove 31 when the rotor 30 is sleeved on the output shaft 12.

[0047] It should be noted that in all the above embodiments, the output shaft 12 may be provided with two drive ribs 13 or two rib grooves 31, or the output shaft 12 may be provided with one drive rib 13 and one rib groove 31, while the rotor 30 may be provided with two rib grooves 31 or two drive ribs 13, or the rotor 30 may be provided with one rib groove 31 and one drive rib 13.

[0048] In some possible implementations, a dedicated end cap 11 is mounted on the motor 10, and the dedicated end cap 11 has a small threaded connection hole and a large threaded connection hole. The inner wall of the rear end cap 20 has a first small through hole and a first large through hole. The rear end of the cylinder body of the cylinder 40 has a second small through hole and a second large through hole. The front end of the cylinder body of the cylinder 40 has a third large through hole. The rotor 30 is disposed in the inner cavity of the cylinder 40. The rear end cap 20 is fitted with the rear end of the cylinder body of the cylinder 40, and is threaded into the small threaded connection hole by screws passing through the second small through hole and the first small through hole in sequence to achieve a tight connection. The inner wall of the front end cap 50 has a fourth large through hole. The front end cap 50 is fitted with the front end of the cylinder body of the cylinder 40, and is threaded into the large threaded connection hole by screws passing through the fourth large through hole, the third large through hole, the second large through hole, and the first large through hole in sequence to achieve a tight connection.

[0049] There is a first gap 61 between the front cover 50 and the front end of the cylinder body of the cylinder 40, and a second gap 62 between the rear cover 20 and the rear end of the cylinder body of the cylinder 40.

[0050] Installation process: Install the special end cover 11 on the motor 10, move the rear end cover 20 onto the output shaft 12, and fit the rotor 30 onto the output shaft 12. At this time, the drive rib 13 and the rib groove 31 will align. Fit the rear end of the cylinder body of the cylinder 40 with the rear end cover 20. At this time, the rotor 30 is located in the inner cavity of the cylinder 40. Then, thread the screws through the second small through hole and the first small through hole in sequence into the small threaded connection hole to install the cylinder 40 and the rear end cover 20. Fit the front end cover 50 with the front end of the cylinder body of the cylinder 40, and thread the screws through the fourth large through hole, the third large through hole, the second large through hole and the first large through hole in sequence into the large threaded connection hole to install the front end cover 50, thereby assembling the dust sampling pump.

[0051] In some possible implementations, the rotor 30 is made of a graphene composite material to improve its strength and stability. The graphene composite material has extremely high strength and stability and a density of about 1 / 5 that of 316 stainless steel. Furthermore, the rotor 30 is hollow in the middle, making the structure smaller and lighter.

[0052] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A direct-drive flexible suspended rotor dust sampling pump, characterized in that, include: Motor (10), on which an output shaft (12) is provided; Rotor (30), said rotor (30) is driven to the output shaft (12) via a connecting assembly; The connecting assembly includes at least one driving rib (13) disposed on the output shaft (12) or the rotor (30), and at least one rib groove (31) correspondingly disposed on the rotor (30) or the output shaft (12), wherein the driving rib (13) can be accommodated in the rib groove (31); The drive rib (13) protrudes from the outer side wall of the output shaft (12) or the inner side wall of the rotor (30); The drive ribs (13) are two in number and symmetrically distributed on both sides of the output shaft (12) or on both sides of the rotor (30); Both ends of the driving rib (13) are formed with wedge-shaped limiting surfaces (14), and the length of the rib groove (31) is greater than the length of the driving rib (13); The groove (31) is located in the middle of the output shaft (12) or the rotor (30), and one end of the groove (31) is connected to a wedge-shaped guide surface (32), which extends to the end of the output shaft (12) or the rotor (30).

2. The direct-drive flexible suspended rotor dust sampling pump according to claim 1, characterized in that, The dust sampling pump also includes: A special end cap (11) is provided on the motor (10), and the special end cap (11) is provided with a small threaded connection hole and a large threaded connection hole.

3. The direct-drive flexible suspended rotor dust sampling pump according to claim 2, characterized in that, The dust sampling pump also includes: The rear end cover (20) has a first small through hole and a first large through hole on its inner wall; The cylinder (40) has a second small through hole and a second large through hole at the rear end of the cylinder body, and a third large through hole at the front end of the cylinder body. The rotor (30) is disposed in the inner cavity of the cylinder (40). The rear end cover (20) is fitted with the rear end of the cylinder body of the cylinder (40), and is connected to the small threaded connection hole by screws through the second small through hole and the first small through hole in sequence to achieve a tight connection.

4. The direct-drive flexible suspended rotor dust sampling pump according to claim 3, characterized in that, The dust sampling pump also includes: The front cover (50) has a fourth large through hole on its inner wall; The front end cover (50) is fitted with the front end of the cylinder body of the cylinder (40), and is connected to the large threaded connection hole by screws passing through the fourth large through hole, the third large through hole, the second large through hole and the first large through hole in sequence, so as to achieve a fast connection.

5. A direct-drive flexible suspended rotor dust sampling pump according to claim 4, characterized in that, There is a first gap (61) between the front end cover (50) and the front end of the cylinder body of the cylinder (40), and there is a second gap (62) between the rear end cover (20) and the rear end of the cylinder body of the cylinder (40).

6. A direct-drive flexible suspended rotor dust sampling pump according to any one of claims 1 to 5, characterized in that, The rotor (30) is made of graphene composite material to improve its strength and stability.

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