Two-stage rotary-vane vacuum pump capable of automatically balancing load

Abstract

The utility model discloses a two-stage rotary-vane vacuum pump capable of balancing load automatically, which comprises a bottom plate, an air inlet, a two-stage rotary-vane vacuum pump body and a cooling fan, the upper end of the air inlet is in threaded connection with a connecting sleeve, and the lower end of the outer surface of the connecting sleeve is fixedly connected with an outer nut fixing block. An annular limiting table is fixedly connected to the lower end of the inner side of the connecting sleeve, a sealing ring adheres to the bottom of the annular limiting table, and a filtering hopper is fixedly connected to the upper end of the inner side of the connecting sleeve; the double-stage rotary-vane vacuum pump further comprises fixing blocks fixedly connected to the front end and the rear end of the double-stage rotary-vane vacuum pump body correspondingly, through grooves are formed in the inner surfaces of the fixing blocks, and guide cylinders are fixedly connected to the inner sides of the through grooves. By additionally arranging the filter hopper, scrap iron or other mechanical substances are prevented from entering, the sealing performance is good, under the assistance of the outer nut fixing block, the connecting sleeve is convenient to disassemble, assemble and replace, and people can use the filter conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a double-stage rotary vane vacuum pump with automatic load balancing. Background Art

[0002] The two-stage rotary vane vacuum pump is made of ferrous metal and is relatively precise. The entire pump works together, so it is not suitable for pumping out various gases that contain too much oxygen, are toxic, explosive, corrode ferrous metals, and have chemical reactions on vacuum oil. It cannot be used as a compressor or a delivery pump. The two-stage rotary vane vacuum pump is widely used in the fields of industry, scientific research, etc.

[0003] At present, the existing two-stage rotary vane vacuum pump is easy to inhale iron filings or other mechanical materials during use, causing single-sided wear, which reduces its service life. In addition, when the temperature of the rotary vane vacuum pump is too high, the oil temperature of the rotary vane vacuum pump will also rise, which will accelerate the movement of thermal molecules and reduce the viscosity of the oil, resulting in an increase in the saturated vapor pressure, which will eventually cause the ultimate vacuum degree to become lower, making the equipment load unbalanced. For this reason, we propose a two-stage rotary vane vacuum pump with automatic load balancing. Utility Model Content

[0004] The utility model aims to provide a two-stage rotary vane vacuum pump with automatic load balancing, which has the advantages of automatic load balancing and long service life, and solves the problem that the existing two-stage rotary vane vacuum pump is easy to inhale iron filings or other mechanical substances during use, causing single-sided wear and reducing its service life, and when the temperature of the rotary vane vacuum pump is too high, the oil temperature of the rotary vane vacuum pump will also increase, so that the movement of thermal molecules is accelerated, and the viscosity of the oil is reduced, resulting in an increase in the saturated vapor pressure, which eventually causes the ultimate vacuum degree to decrease, resulting in an unbalanced equipment load.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a two-stage rotary vane vacuum pump with automatic load balancing, comprising a bottom plate and an air inlet, a two-stage rotary vane vacuum pump body and a heat dissipation fan, the upper end of the air inlet is threadedly connected with a connecting sleeve, the lower end of the outer surface of the connecting sleeve is fixedly connected with an external nut fixing block, the lower end of the inner side of the connecting sleeve is fixedly connected with an annular limit platform, the bottom of the annular limit platform is bonded with a sealing ring, and the upper end of the inner side of the connecting sleeve is fixedly connected with a filter bucket;

[0006] Also includes:

[0007] The front and rear ends of the double-stage rotary vane vacuum pump body are respectively fixedly connected with fixing blocks, the inner surface of the fixing block is provided with a through groove, and the inner side of the through groove is fixedly connected with a guide tube.

[0008] Preferably, a shock-absorbing pad is bonded to the bottom of the base plate, and mounting holes are provided at both left and right ends of the base plate.

[0009] Preferably, a two-stage rotary vane vacuum pump body is fixedly mounted on the top of the base plate, and a drive motor is fixedly mounted on the left side of the two-stage rotary vane vacuum pump body.

[0010] Preferably, a hanging ring and an air inlet are arranged at the left end of the top of the two-stage rotary vane vacuum pump body, and an exhaust port is arranged at the right end of the top of the two-stage rotary vane vacuum pump body.

[0011] Preferably, a control box is fixedly installed on the top of the driving motor, and a temperature sensor is fixedly installed on the right side of the two-stage rotary vane vacuum pump body.

[0012] Preferably, there are multiple flow guide tubes, and two adjacent flow guide tubes are fixedly connected. Meanwhile, the longitudinal section of the flow guide tube is conical.

[0013] Preferably, a support column is fixedly connected to the top of the fixed block, a fixed plate is fixedly connected to the top of the support column, and a heat dissipation fan is fixedly installed on the inner side of the fixed plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model avoids the entry of iron filings or other mechanical substances by adding a filter bucket, and has good sealing performance. With the assistance of the external nut fixing block, the disassembly, assembly and replacement of the connecting sleeve is convenient for people to use.

[0016] 2. The utility model uses compressed gas air cooling to quickly cool the double-stage rotary vane vacuum pump body, which can greatly improve its own heat dissipation efficiency and achieve the ability to automatically balance the load through cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0019] Figure 3 This is a schematic diagram of the structure of the heat dissipation fan and the fixing block of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the connecting sleeve of the utility model.

[0021] In the figure: 1. Base plate; 2. Mounting hole; 3. Drive motor; 4. Control box; 5. Lifting ring; 6. Air inlet; 7. Exhaust port; 8. Two-stage rotary vane vacuum pump body; 9. Cooling fan; 10. Fixing plate; 11. Fixing block; 12. Shock-absorbing pad; 13. Guide tube; 14. Support column; 15. Temperature sensor; 16. Through groove; 17. Connecting sleeve; 18. Annular limit platform; 19. Sealing ring; 20. Filter bucket; 21. External nut fixing block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The base plate 1, mounting hole 2, drive motor 3, control box 4, lifting ring 5, air inlet 6, exhaust port 7, two-stage rotary vane vacuum pump body 8, cooling fan 9, fixing plate 10, fixing block 11, shock-absorbing pad 12, guide tube 13, support column 14, temperature sensor 15, through groove 16, connecting sleeve 17, annular limit platform 18, sealing ring 19, filter bucket 20 and external nut fixing block 21 of the present application are all universal standard parts or parts known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0026] Embodiment 1

[0027] See also Figure 1 , Figure 2 and Figure 4 As shown, the utility model provides a technical solution: a two-stage rotary vane vacuum pump with automatic load balancing, comprising a bottom plate 1 and an air inlet 6, a two-stage rotary vane vacuum pump body 8 and a heat dissipation fan 9, the upper end of the air inlet 6 is threadedly connected with a connecting sleeve 17, the lower end of the outer surface of the connecting sleeve 17 is fixedly connected with an outer nut fixing block 21, the lower end of the inner side of the connecting sleeve 17 is fixedly connected with an annular limiting platform 18, the bottom of the annular limiting platform 18 is bonded with a sealing ring 19, and the upper end of the inner side of the connecting sleeve 17 is fixedly connected with a filter bucket 20;

[0028] Among them, a shock-absorbing pad 12 is bonded to the bottom of the bottom plate 1, and mounting holes 2 are opened at both left and right ends of the bottom plate 1;

[0029] Among them, a two-stage rotary vane vacuum pump body 8 is fixedly installed on the top of the bottom plate 1, and a driving motor 3 is fixedly installed on the left side of the two-stage rotary vane vacuum pump body 8;

[0030] The left end of the top of the double-stage rotary vane vacuum pump body 8 is provided with a hanging ring 5 and an air inlet 6, and the right end of the top of the double-stage rotary vane vacuum pump body 8 is provided with an exhaust port 7.

[0031] The technical solution, through the provision of the shock-absorbing pad 12, can play the role of buffering and shock-absorbing when the two-stage rotary vane vacuum pump body 8 is working. After the connecting sleeve 17 and the upper end of the air inlet 6 are threadedly connected, and with the assistance of the annular limit platform 18 and the sealing ring 19, the sealing of the connecting sleeve 17 and the air inlet 6 is guaranteed. When the air inlet 6 inhales gas, the gas must be filtered through the filter bucket 20, thereby avoiding the entry of iron filings or other mechanical substances, thereby improving the service life of the two-stage rotary vane vacuum pump, and with the assistance of the external nut fixing block 21, the disassembly, assembly and replacement of the connecting sleeve 17 is facilitated.

[0032] Embodiment 2

[0033] On the basis of embodiment 1, the utility model is as follows Figure 1-Figure 3 As shown, a two-stage rotary vane vacuum pump body 8 is disclosed, wherein the front and rear ends thereof are respectively fixedly connected with a fixing block 11, the inner surface of the fixing block 11 is provided with a through groove 16, and the inner side of the through groove 16 is fixedly connected with a guide tube 13;

[0034] Among them, a control box 4 is fixedly installed on the top of the driving motor 3, and a temperature sensor 15 is fixedly installed on the right side of the two-stage rotary vane vacuum pump body 8;

[0035] There are multiple guide tubes 13, and two adjacent guide tubes 13 are fixedly connected. Meanwhile, the longitudinal section of the guide tube 13 is conical.

[0036] The top of the fixing block 11 is fixedly connected with a supporting column 14 , the top of the supporting column 14 is fixedly connected with a fixing plate 10 , and a heat dissipation fan 9 is fixedly installed on the inner side of the fixing plate 10 .

[0037] The present technical solution can monitor the temperature of the two-stage rotary vane vacuum pump body 8 in real time through the setting of the temperature sensor 15. When the temperature of the two-stage rotary vane vacuum pump body 8 exceeds the set value, with the assistance of the control box 4, the heat dissipation fan 9 is turned on to work, thereby being able to induce external gas to blow through the guide tube 13 and the through groove 16. The gas will be compressed and cooled in the process of passing through the guide tube 13. After the compressed and cooled gas and the gas passing through the through groove 16 blow the two-stage rotary vane vacuum pump body 8, the heat dissipation efficiency of the pump body can be greatly improved, and the ability to automatically balance the load through cooling can be achieved.

[0038] Working principle: The setting of the shock-absorbing pad 12 can provide a buffering and shock-absorbing function when the two-stage rotary vane vacuum pump body 8 is working. After the connecting sleeve 17 and the upper end of the air inlet 6 are connected by threads, and with the assistance of the annular limit platform 18 and the sealing ring 19, the sealing performance of the connecting sleeve 17 and the air inlet 6 is guaranteed. When the air inlet 6 inhales gas, the gas must be filtered through the filter 20, thereby avoiding the entry of iron filings or other mechanical substances, thereby improving the service life of the two-stage rotary vane vacuum pump. With the assistance of the external nut fixing block 21, the disassembly and assembly of the connecting sleeve 17 is facilitated. By setting the temperature sensor 15, the temperature of the two-stage rotary vane vacuum pump body 8 can be monitored in real time. When the temperature of the two-stage rotary vane vacuum pump body 8 exceeds the set value, with the assistance of the control box 4, the heat dissipation fan 9 is turned on to work, thereby attracting external gas to blow through the guide tube 13 and the through groove 16. The gas will be compressed and cooled in the process of passing through the guide tube 13. After the compressed and cooled gas and the gas passing through the through groove 16 blow the two-stage rotary vane vacuum pump body 8, the heat dissipation efficiency of the pump body can be greatly improved, and the ability to automatically balance the load through cooling can be achieved.

[0039] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0040] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A two-stage rotary vane vacuum pump with automatic load balancing, comprising a base plate (1) and an air inlet (6), a two-stage rotary vane vacuum pump body (8) and a heat dissipation fan (9), wherein the upper end of the air inlet (6) is threadedly connected with a connecting sleeve (17), the lower end of the outer surface of the connecting sleeve (17) is fixedly connected with an external nut fixing block (21), the lower end of the inner side of the connecting sleeve (17) is fixedly connected with an annular limiting platform (18), the bottom of the annular limiting platform (18) is bonded with a sealing ring (19), and the upper end of the inner side of the connecting sleeve (17) is fixedly connected with a filter bucket (20); It is characterized in that Also includes: The front and rear ends of the two-stage rotary vane vacuum pump body (8) are respectively fixedly connected to fixed blocks (11), the inner surface of the fixed block (11) is provided with a through groove (16), and the inner side of the through groove (16) is fixedly connected to a guide tube (13).

2. The automatic load-balancing two-stage rotary vane vacuum pump according to claim 1, characterized in that: A shock-absorbing pad (12) is bonded to the bottom of the base plate (1), and mounting holes (2) are provided at both left and right ends of the base plate (1).

3. The automatic load-balancing two-stage rotary vane vacuum pump according to claim 1, characterized in that: A two-stage rotary vane vacuum pump body (8) is fixedly mounted on the top of the base plate (1), and a drive motor (3) is fixedly mounted on the left side of the two-stage rotary vane vacuum pump body (8).

4. The automatic load-balancing two-stage rotary vane vacuum pump according to claim 1, characterized in that: A hanging ring (5) and an air inlet (6) are arranged at the left end of the top of the two-stage rotary vane vacuum pump body (8), and an exhaust port (7) is arranged at the right end of the top of the two-stage rotary vane vacuum pump body (8).

5. The automatic load-balancing two-stage rotary vane vacuum pump according to claim 3, characterized in that: A control box (4) is fixedly mounted on the top of the driving motor (3), and a temperature sensor (15) is fixedly mounted on the right side of the two-stage rotary vane vacuum pump body (8).

6. The automatic load-balancing two-stage rotary vane vacuum pump according to claim 1, characterized in that: There are a plurality of flow guide tubes (13), and two adjacent flow guide tubes (13) are fixedly connected. Meanwhile, the longitudinal section of the flow guide tube (13) is conical.

7. The automatic load-balancing two-stage rotary vane vacuum pump according to claim 1, characterized in that: The top of the fixed block (11) is fixedly connected to a support column (14), the top of the support column (14) is fixedly connected to a fixed plate (10), and a heat dissipation fan (9) is fixedly installed on the inner side of the fixed plate (10).

Images