Constant-pressure reaction vacuum pump

Abstract

The utility model discloses a constant-pressure reaction vacuum pump which comprises a shell, a first blocking piece, a second blocking piece, a third blocking edge, a front-stage impeller and a rear-stage impeller. The first blocking piece, the second blocking piece, the third blocking edge, the front-stage impeller and the rear-stage impeller are arranged in the shell and are coaxially distributed. The front-stage impeller is located between the first blocking piece and the second blocking piece, the rear-stage impeller is located between the second blocking piece and the third blocking piece, and the length of the front-stage impeller is smaller than that of the rear-stage impeller. The first blocking piece is provided with a first air hole, the second blocking piece is provided with a second air hole, the third blocking piece is provided with a third air hole, the opening area of the first air hole is smaller than that of the second air hole, and the opening area of the second air hole is smaller than that of the third air hole. The constant-pressure reaction vacuum pump disclosed by the utility model has the beneficial effects that gas is firstly sucked into the space where the preceding-stage impeller is located, only residual gas is reserved through rapid rotation of the preceding-stage impeller, and the residual gas is further sucked into the space where the backward-stage impeller is located; and the residual gas is further compressed to lower pressure through rapid rotation of the rear-stage impeller.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of vacuum pump, concretely relates to a constant pressure reaction vacuum pump. BACKGROUND

[0002] The utility model discloses a new type constant pressure rotary vane vacuum pump's utility model patent with the public number CN221547288U, and its IPC classification number is F04C29 / 00, and its technical scheme discloses "the lower end of inlet pipe and outlet pipe is fixedly installed on the upper surface of pump body, the upper surface of inlet pipe is fixedly installed with square box, the upper end of square box is fixedly connected with round pipe, the left side of square box is provided with the slot, the right side of slot is provided with the baffle, and the baffle is slidably inserted in the inside of square box, and the bottom surface of baffle is fixedly connected with support telescopic link, and the lower end of support telescopic link is fixedly connected with the inner wall of square box".

[0003] From this, the above utility model patent has disclosed one of the technical schemes of the vacuum pump with constant pressure function. However, the technical scheme disclosed in the above utility model patent focuses on cleaning the accumulated dust without disassembly, and does not further solve the problems of staged air extraction, and needs to be further improved. UTILITY MODEL CONTENT

[0004] The utility model provides a constant pressure reaction vacuum pump aiming at the condition of prior art, overcomes the above-mentioned defects.

[0005] The utility model adopts the following technical scheme, constant pressure reaction vacuum pump, including the shell and the first baffle, the second baffle, the third baffle, the front stage impeller and the rear stage impeller that are inbuilt in the shell and coaxial distribution, wherein:

[0006] The front stage impeller is located between the first baffle and the second baffle, and the rear stage impeller is located between the second baffle and the third baffle, and the length of the front stage impeller is less than the length of the rear stage impeller;

[0007] The first baffle has the first air hole, the second baffle has the second air hole, the third baffle has the third air hole, the opening area of the first air hole is less than the opening area of the second air hole, and the opening area of the second air hole is less than the opening area of the third air hole.

[0008] As the preferred technical scheme of the above technical scheme, the first air hole is eccentrically distributed relative to the center of the first baffle, the second air hole is eccentrically distributed relative to the center of the second baffle, and the third air hole is eccentrically distributed relative to the center of the third baffle.

[0009] As the preferred technical scheme of the above technical scheme, the first air hole is arc-shaped and is distributed along the circumferential direction of the first baffle, the second air hole is arc-shaped and is distributed along the circumferential direction of the second baffle, and the third air hole is arc-shaped and is distributed along the circumferential direction of the third baffle.

[0010] As the preferred technical scheme of the above technical scheme, the front-stage impeller is provided with a front-stage impeller core and front-stage impeller blades distributed at equal intervals along the circumferential direction of the front-stage impeller core, and the front-stage impeller blades are integrally formed with the front-stage impeller core.

[0011] As the preferred technical scheme of the above technical scheme, the rear-stage impeller is provided with a rear-stage impeller core and rear-stage impeller blades distributed at equal intervals along the circumferential direction of the rear-stage impeller core, and the rear-stage impeller blades are integrally formed with the rear-stage impeller core.

[0012] The constant-pressure reaction vacuum pump has the advantages that gas is first sucked into the space where the front-stage impeller is located, only residual gas is reserved through the rapid rotation of the front-stage impeller, the residual gas is further sucked into the space where the rear-stage impeller is located, the residual gas is further compressed to a lower pressure through the rapid rotation of the rear-stage impeller, and thus the environment where the constant-pressure reaction is located is continuously maintained stable, and conditions for stable operation of the constant-pressure reaction are created. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of one angle of the present application.

[0014] Figure 2 is a perspective view of another angle of the present application.

[0015] Figure 3 is a front view of the present application.

[0016] Figure 4 is a side view of the present application.

[0017] Figure 5 is a partial structure schematic view of the present application.

[0018] Figure 6 is Figure 5 a schematic view of another angle of the present application.

[0019] Figure 7 is a perspective view of the front-stage impeller of the present application.

[0020] Figure 8 is a perspective view of the rear-stage impeller of the present application.

[0021] The reference signs include: 100 - shell; 110 - first section body; 120 - second section body; 130 - third section body; 140 - fourth section body; 200 - first baffle; 201 - first gas hole; 202 - first O-shaped ring; 300 - second baffle; 302 - second O-shaped ring; 400 - third baffle; 401 - third gas hole; 402 - third O-shaped ring; 500 - front-stage impeller; 510 - front-stage impeller core body; 520 - front-stage impeller blade; 600 - rear-stage impeller; 610 - rear-stage impeller core body; 620 - rear-stage impeller blade. DETAILED DESCRIPTION

[0022] The utility model discloses a constant pressure reaction vacuum pump, below combining preferred implementation (example 1), referring to the Figures 1 to 8 , the specific implementation of the utility model is further described.

[0023] Referring to the Figures 1 to 8 , Figures 1 to 4 respectively show the constant pressure reaction vacuum pump of different visual angle, Figure 5 and Figure 6 respectively show the internal structure of constant pressure reaction vacuum pump, Figure 7 show the front-stage impeller, Figure 8 show the rear-stage impeller.

[0024] Example 1.

[0025] Preferably, the constant pressure reaction vacuum pump, including shell 100 and built -in in shell 100 and coaxial distribution's first baffle 200, second baffle 300, third baffle 400, front-stage impeller 500 and rear-stage impeller 600 (front-stage impeller 500 and rear-stage impeller 600 are driven by motor, and the motor is not shown in the drawing), wherein:

[0026] The front-stage impeller 500 is located between the first baffle 200 and the second baffle 300, and the rear-stage impeller 600 is located between the second baffle 300 and the third baffle 400. The length of the front-stage impeller 500 (in the axial direction of the front-stage impeller 500) is less than the length of the rear-stage impeller 600 (in the axial direction of the rear-stage impeller 600). The gas is first sucked into the space where the front-stage impeller 500 is located, and only residual gas is retained through the rapid rotation of the front-stage impeller 500. The residual gas is further sucked into the space where the rear-stage impeller 600 is located, and the residual gas is further compressed to a lower pressure (close to the vacuum range) through the rapid rotation of the rear-stage impeller 600, so that the environment for constant pressure reaction is continuously maintained stable, creating conditions for stable operation of constant pressure reaction. At the same time, the gas has different pressure gradient distributions at different positions inside the shell 100.

[0027] The first baffle 200 has a first gas hole 201, the second baffle 300 has a second gas hole (not shown in the figure), the third baffle 400 has a third gas hole 401, the opening area of the first gas hole 201 (calculated by the cross-sectional area, the same below) is smaller than the opening area of the second gas hole, and the opening area of the second gas hole is smaller than the opening area of the third gas hole 401; it is helpful to unblock the gas passage during the rotation of the front-stage impeller 500 and the rear-stage impeller 600.

[0028] Among them, the first gas hole 201 is eccentrically distributed relative to the center of the first baffle 200, the second gas hole is eccentrically distributed relative to the center of the second baffle 300, and the third gas hole 401 is eccentrically distributed relative to the center of the third baffle 400.

[0029] Among them, the first gas hole 201 is arc-shaped and distributed along the circumferential direction of the first baffle 200, the second gas hole is arc-shaped and distributed along the circumferential direction of the second baffle 300, and the third gas hole 401 is arc-shaped and distributed along the circumferential direction of the third baffle 400.

[0030] Among them, the front-stage impeller 500 is provided with a front-stage impeller core 510 and front-stage impeller blades 520 distributed equidistantly along the circumferential direction of the front-stage impeller core 510, and the front-stage impeller blades 520 are integrally formed with the front-stage impeller core 510 to guide the airflow.

[0031] Among them, the rear-stage impeller 600 is provided with a rear-stage impeller core 610 and rear-stage impeller blades 620 distributed equidistantly along the circumferential direction of the rear-stage impeller core 610, and the rear-stage impeller blades 620 are integrally formed with the rear-stage impeller core 610 to guide the airflow.

[0032] Among them, the shell 100 includes a first segment body 110, a second segment body 120, a third segment body 130 and a fourth segment body 140 which are integrally formed and sequentially connected.

[0033] Among them, the constant-pressure reaction vacuum pump further includes a first O-ring 202 distributed along the outer periphery of the first baffle 200, the first O-ring 202 is located at the joint of the first segment body 110 and the second segment body 120, and the first O-ring 202 simultaneously abuts against the first segment body 110 and the second segment body 120 to avoid disturbing the airflow passage.

[0034] Among them, the constant-pressure reaction vacuum pump further includes a second O-ring 302 distributed along the outer periphery of the second baffle 300, the second O-ring 302 is located at the joint of the second segment body 120 and the third segment body 130, and the second O-ring 302 simultaneously abuts against the second segment body 120 and the third segment body 130 to avoid disturbing the airflow passage.

[0035] The constant pressure reaction vacuum pump further comprises a third O-shaped ring 402 distributed along the outer periphery of the third baffle 400, the third O-shaped ring 402 is located at the joint of the third section body 130 and the fourth section body 140, and the third O-shaped ring 402 abuts against the third section body 130 and the fourth section body 140 at the same time, so that the turbulent airflow passage is avoided.

[0036] It is worth mentioning that the specific structure of the first section body 110 and other technical features involved in the utility model patent application should be regarded as the prior art, the specific structure, working principle and possible control mode and spatial arrangement mode involved in the technical features can be selected according to the conventional selection in the field, and should not be regarded as the invention point of the utility model patent, and the utility model patent will not be further expanded and described in detail.

[0037] For those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced, and any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A constant pressure reaction vacuum pump, characterized by, The shell and the first baffle, the second baffle, the third baffle, the front-stage impeller and the rear-stage impeller which are arranged coaxially in the shell are included, wherein: The front-stage impeller is located between the first baffle and the second baffle, and the rear-stage impeller is located between the second baffle and the third baffle, and the length of the front-stage impeller is less than the length of the rear-stage impeller; The first baffle has the first air hole, the second baffle has the second air hole, and the third baffle has the third air hole, and the opening area of the first air hole is less than the opening area of the second air hole, and the opening area of the second air hole is less than the opening area of the third air hole.

2. The constant pressure reactor vacuum pump according to claim 1, characterized in that The first air hole is arranged eccentrically relative to the center of the first baffle, the second air hole is arranged eccentrically relative to the center of the second baffle, and the third air hole is arranged eccentrically relative to the center of the third baffle.

3. The constant pressure reactor vacuum pump according to claim 1, characterized in that, The first air hole is arranged in an arc shape along the circumferential direction of the first baffle, the second air hole is arranged in an arc shape along the circumferential direction of the second baffle, and the third air hole is arranged in an arc shape along the circumferential direction of the third baffle.

4. The constant pressure reactor vacuum pump of claim 1, wherein, The front-stage impeller is provided with a front-stage impeller core and front-stage impeller blades which are arranged equidistantly along the circumferential direction of the front-stage impeller core, and the front-stage impeller blades are integrally formed with the front-stage impeller core.

5. The constant pressure reactor vacuum pump of claim 1, wherein, The rear-stage impeller is provided with a rear-stage impeller core and rear-stage impeller blades which are arranged equidistantly along the circumferential direction of the rear-stage impeller core, and the rear-stage impeller blades are integrally formed with the rear-stage impeller core.

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