High-strength corrosion-resistant vacuum pump shaft structure

Abstract

The utility model discloses a high-strength corrosion-resistant vacuum pump shaft structure which comprises a first pump body shell, a second pump body shell is arranged at the lower end of the first pump body shell, and the interior of the second pump body shell and the interior of the first pump body shell are each of an open structure. Clamping grooves are formed in the front ends and the rear ends of the interiors of the side walls of the two sides of the second pump body shell and the first pump body shell correspondingly, protective sleeves are arranged in the clamping grooves, the protective sleeves and the clamping grooves are clamped and fixed, sealing rings are fixedly arranged on the two sides of the exteriors of the protective sleeves correspondingly, and the sealing rings extend to the exteriors of the clamping grooves; and pump shaft bodies are arranged at the front end and the rear end of the upper portion in the second pump body shell, the pump shaft bodies extend out of the first pump body shell through protective sleeves, the pump shaft bodies are rotationally connected with the protective sleeves, and the structure solves the problems that a pump shaft is prone to abrasion, and the pump body shells are difficult to disassemble and assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum pump technical field, concretely is high strength corrosion -resistant vacuum pump shaft structure. BACKGROUND

[0002] The vacuum pump is used for extracting the air in the container to form the vacuum device or equipment, utilizes the rotor high -speed rotation in the pump body to compress the air, thereby makes the air in the container be extracted to the vacuum pump, wherein, the vacuum pump shaft is connected motor and vacuum pump internal pumping assembly, transmits power and supports the key structure of rotating part, the vacuum pump shaft usually adopts high -strength alloy steel, and the shaft diameter needs to be determined according to the torque and rotational speed.

[0003] For example, the Chinese patent with the announcement number CN211525079U "a vacuum pump single shaft body pump core assembly", including the high -grade pump body and low -grade pump body connected with bolt, the high -grade pump body and low -grade pump body are equipped with rotor, the rotor front end is equipped with high -grade rotator and low -grade rotator in proper order, high -grade rotator is equipped with high -grade rotary vane groove, a pair of high -grade rotary vane is equipped in high -grade rotary vane groove, low -grade rotator is equipped with low -grade rotary vane groove, and a pair of low -grade rotary vane is equipped in low -grade rotary vane groove, and the middle part of rotor is equipped with a pair of oil pump rotary vane groove on both sides, and oil pump rotary vane is equipped in oil pump rotary vane groove, and the rear end of rotor is equipped with connecting portion, the top of low -grade pump body is equipped with exhaust device, the exhaust device includes exhaust valve cover and exhaust valve seat connected with screw, exhaust valve seat is fixed on the top of low -grade pump body through screw, exhaust valve seat bottom is equipped with exhaust valve spring and exhaust valve piece, the exhaust valve spring and exhaust valve piece are installed in the exhaust hole in the top of low -grade pump body, the side surface of exhaust valve seat is equipped with oil return hole, and oil return pipe is equipped in oil return hole, the oil return pipe is fixed through oil return pipe fixing sheet, the front end of low -grade pump body is equipped with pump cover through pump cover fixing bolt, and first sealing ring and positioning pin are equipped between low -grade pump body and pump cover, positioning pin is equipped between high -grade pump body and low -grade pump body, shaft seal seat is equipped with shaft seal seat through shaft seal seat fixing bolt, and shaft seal is equipped in shaft seal seat, and shaft coupling is equipped in the rear end of shaft seal seat, and second sealing ring is equipped between shaft seal seat and high -grade pump body.

[0004] The above-mentioned prior art can realize the use of pump body, but in actual use, on the one hand, the pump shaft is prone to wear, the pump shaft is usually in direct contact with the pump body shell, which causes the pump shaft to rub against the pump body shell during rotation, thereby accelerating the wear of the pump shaft, on the other hand, the pump body shell is difficult to disassemble, the pump body shell is usually fixed by welding, which causes the pump shaft to be damaged and the entire vacuum extraction structure to be replaced, thereby increasing the maintenance cost of the vacuum pump, therefore, it does not meet the existing demand, for this, we propose a high-strength corrosion-resistant vacuum pump shaft structure. UTILITY MODEL CONTENTS

[0005] The utility model discloses a high -strength corrosion -resistant vacuum pump shaft structure to solve the problem of the pump shaft easy to appear abrasion and the pump body shell difficult to disassemble in the background art.

[0006] In order to realize the above object, the utility model provides the following technical scheme: high -strength corrosion -resistant vacuum pump shaft structure, including first pump body shell, the lower extreme of first pump body shell is provided with second pump body shell, and the inside of second pump body shell and first pump body shell is open -ended structure, the inside of both sides wall of second pump body shell and first pump body shell two sides is provided with the front -and -rear end of card slot, the inside of card slot is provided with the sheath, and the sheath is fixed with the card joint of card slot, the both sides of sheath outside are fixedly provided with the seal ring, and the seal ring extends to the outside of card slot, the front -and -rear end of second pump body shell inside upper portion is provided with pump shaft body, and pump shaft body extends to the outside of first pump body shell through sheath, and pump shaft body is connected with the rotation of sheath.

[0007] Preferably, the front and rear ends of the first and second pump body shells are fixedly provided with a connecting seat outside, the connecting seat is provided with a plurality of through holes inside, the through holes are equidistantly distributed, and the through holes are through structure.

[0008] Preferably, the connecting seat is provided with a bolt at the upper end, the lower end of the bolt extends to the lower side of the connecting seat through the through hole, and the outer side of the lower end of the bolt is provided with a nut, and the lower end of the connecting seat is in contact with the nut.

[0009] Preferably, the pump shaft body is provided with a spiral blade at the central position outside, and the outer sides of the pump shaft body on both sides of the spiral blade are provided with a corrosion-resistant coating.

[0010] Preferably, the upper end, the front and rear ends inside the first pump body shell and the front and rear ends inside the second pump body shell are provided with a plurality of heat dissipation grooves, and the heat dissipation grooves are equidistantly distributed.

[0011] Preferably, the both sides of the first and second pump body shells are fixedly provided with a sealing ring outside, and the sealing ring is arranged on the outer side of the pump shaft body.

[0012] Preferably, the both sides of the lower end of the second pump body shell are fixedly provided with a bracket, the upper end of the first pump body shell is fixedly provided with an air outlet pipe, the air outlet pipe is in communication with the inside of the first pump body shell, and the central position of the lower end of the second pump body shell is fixedly provided with an air inlet pipe, and the air inlet pipe is in communication with the inside of the second pump body shell.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] (1) The utility model discloses a clamping groove and sheath provide protection for the pump shaft body and shell junction, when the pump shaft is put into the inside of shell, first pump shaft body both sides are aligned with the opening of sheath and are penetrated entire sheath, until the sheath is moved to the appropriate position on the pump shaft body, at this time, the sheath is put into the inside of the clamping groove of the second pump body shell with the pump shaft body again, and the sheath is fixed with the clamping groove, and the outer wall of sheath and the inside of clamping groove contact, first pump body shell is placed on the top of second pump body shell again, so that first pump body shell and second pump body shell extrude and fix the sheath, when the pump body works, the pump shaft body rotates in the sheath, thereby reducing the friction between pump shaft body and shell.

[0015] (2) The utility model discloses a bolt and nut, can first pump body shell and second pump body shell are fixed, when the shell installs, the pump shaft pump body is placed on the second pump body shell, at this time, first pump body shell is moved to the top of second pump body shell by the operator and is moved downward, until first pump body shell is moved to the appropriate position, at this time, the upper end of sheath enters the inside of the clamping groove of first pump body shell, the bolt is aligned with the opening of through -hole and is inserted into the through -hole by the operator again, so that the lower end of bolt extends to the below of connecting seat, at this time, the nut is sleeved on the outside of bolt, and the first pump body shell and second pump body shell connection fixed are completed, thereby improve the flexibility of shell dismounting.

[0016] (3) The utility model discloses being provided with corrosion -resistant coating, can improve the corrosion -resistant ability of pump shaft body, and the dense protective layer is formed on the pump shaft surface through corrosion -resistant coating, and the direct contact of corrosive medium and metal base material is blocked, and chemical corrosion and electrochemistry corrosion are inhibited, avoid the damage of pump shaft body due to corrosion, thereby improve the service life of pump shaft body, simultaneously, avoid the size deviation of pump shaft body due to corrosion, thereby maintain the stable suction rate. ACCURACY OF DRAWINGS

[0017] Figure 1 It is the overall structure perspective drawing of the utility model;

[0018] Figure 2 It is the internal structure front view of the utility model;

[0019] Figure 3 It is the internal structure side view of the utility model;

[0020] Figure 4 It is the Figure 2 A area local amplification drawing of the utility model.

[0021] In the figure: 1, the first pump body shell; 2, the second pump body shell; 3, the sealing ring; 4, the pump shaft body; 5, the sealing ring; 6, the connecting seat; 7, the bolt; 8, the nut; 9, the support; 10, the air outlet pipe; 11, the heat dissipation groove; 12, the spiral blade; 13, the corrosion-resistant coating; 14, the sheath; 15, the clamping groove; 16, the air inlet pipe; 17, the through hole. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] Please refer to Figures 1-4 , the utility model provides an embodiment: high strength corrosion -resistant vacuum pump shaft structure, including first pump body shell 1, the lower end of first pump body shell 1 is provided with second pump body shell 2, the inside of second pump body shell 2 and first pump body shell 1 is open type structure, the upper end, the front and rear end in the inside of first pump body shell 1 and the front and rear end in the inside of second pump body shell 2 are all provided with a plurality of heat dissipation grooves 11, heat dissipation grooves 11 are equidistant distribution, the both sides of the outside of first pump body shell 1 and second pump body shell 2 are fixedly provided with sealing ring 3, sealing ring 3 is arranged at the outside of pump shaft body 4, the both sides of the lower end of second pump body shell 2 are fixedly provided with support 9, the upper end of first pump body shell 1 is fixedly provided with air outlet pipe 10, air outlet pipe 10 is communicated with the inside of first pump body shell 1, the central position of the lower end of second pump body shell 2 is fixedly provided with air inlet pipe 16, air inlet pipe 16 is communicated with the inside of second pump body shell 2.

[0024] Please refer to Figure 1 , Figure 2 and Figure 4 , the front and rear end in the inside of the both sides wall of second pump body shell 2 and first pump body shell 1 are all provided with clamping groove 15, the inside of clamping groove 15 is provided with sheath 14, sheath 14 is clamped and fixed with clamping groove 15, the both sides of the outside of sheath 14 are fixedly provided with sealing ring 5, sealing ring 5 extends to the outside of clamping groove 15, the front and rear end in the inside of second pump body shell 2 upper are all provided with pump shaft body 4, pump shaft body 4 extends to the outside of first pump body shell 1 through sheath 14, and pump shaft body 4 is rotationally connected with sheath 14, wherein pump shaft body 4 is made of high-strength material, sheath 14 is made of copper-based graphite composite material, which facilitates reducing the wear of pump shaft body 4 through sheath 14.

[0025] Please refer to Figure 1 and Figure 3The first pump body shell 1 and the second pump body shell 2 are fixedly provided with a connecting seat 6 at the front end and the rear end outside the first pump body shell 1 and the second pump body shell 2, a plurality of through holes 17 are arranged in the connecting seat 6, the through holes 17 are equidistantly distributed, the through holes 17 are through structures, a bolt 7 is arranged at the upper end of the connecting seat 6, the lower end of the bolt 7 extends to the lower side of the connecting seat 6 through the through hole 17, a nut 8 is sleeved outside the lower end of the bolt 7, the nut 8 is in contact with the lower end of the connecting seat 6, and the first pump body shell 1 and the second pump body shell 2 are fixed through the bolt 7 and the nut 8.

[0026] Please refer to Figure 2 and Figure 4 The pump shaft body 4 is fixedly provided with a spiral blade 12 at the central position outside the pump shaft body 4, and the pump shaft body 4 is provided with a corrosion-resistant coating 13 outside the two sides of the spiral blade 12, wherein the corrosion-resistant coating 13 is made of ceramic matrix composite material, and the corrosion-resistant coating 13 improves the corrosion resistance of the pump shaft body 4.

[0027] Working principle: in use, first, the pump shaft body 4 is aligned with the openings of the sheaths 14 on both sides and penetrates through the whole sheaths 14 until the sheaths 14 are moved to the appropriate positions on the pump shaft body 4, at this time, the sheaths 14 and the pump shaft body 4 are placed in the inside of the clamping grooves 15 on the second pump body shell 2, and the sheaths 14 are clamped and fixed with the clamping grooves 15, and the outer wall of the sheaths 14 is in contact with the inside of the clamping grooves 15, then the first pump body shell 1 is placed above the second pump body shell 2, so that the first pump body shell 1 and the second pump body shell 2 extrude and fix the sheaths 14, when the pump body works, the pump shaft body 4 rotates in the sheaths 14, when the shell is installed, the pump shaft body 4 has been placed on the second pump body shell 2, at this time, the operator moves the first pump body shell 1 to the top of the second pump body shell 2 and moves downward until the first pump body shell 1 is moved to the appropriate position, at this time, the upper end of the sheaths 14 enters the inside of the clamping grooves 15 on the first pump body shell 1, then the operator aligns the openings of the through holes 17 with the bolt 7 and inserts the bolt 7 into the through holes 17, so that the lower end of the bolt 7 extends to the lower side of the connecting seat 6, at this time, the nut 8 is sleeved outside the bolt 7, and the first pump body shell 1 and the second pump body shell 2 are connected and fixed.

[0028] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. High-strength corrosion-resistant vacuum pump shaft structure, comprising a first pump body shell (1), characterized in that: The lower end of the first pump body shell (1) is provided with a second pump body shell (2). The interior of the second pump body shell (2) and the first pump body shell (1) are both open structures. The front and rear ends of the side walls of the second pump body shell (2) and the first pump body shell (1) are provided with snap-fit ​​grooves (15). The inside of the snap-fit ​​groove (15) is provided with a sleeve (14). The sleeve (14) is snap-fitted and fixed with the snap-fit ​​groove (15). The two sides of the outside of the sleeve (14) are fixedly provided with sealing rings (5). The sealing rings (5) extend to the outside of the snap-fit ​​groove (15). The front and rear ends of the upper part of the second pump body shell (2) are provided with pump shaft bodies (4). The pump shaft bodies (4) extend to the outside of the first pump body shell (1) through the sleeve (14), and the pump shaft bodies (4) are rotatably connected with the sleeve (14).

2. The high-strength corrosion-resistant vacuum pump shaft structure according to claim 1, characterized in that: The front and rear ends of the first pump body shell (1) and the second pump body shell (2) are fixedly provided with connecting seats (6). The connecting seats (6) have several through holes (17) inside. The through holes (17) are evenly distributed and have a through structure.

3. The high-strength corrosion-resistant vacuum pump shaft structure according to claim 2, characterized in that: The upper end of the connecting seat (6) is provided with a bolt (7), and the lower end of the bolt (7) extends to the lower part of the connecting seat (6) through a through hole (17). A nut (8) is sleeved on the lower end of the bolt (7), and the nut (8) contacts the lower end of the connecting seat (6).

4. The high-strength corrosion-resistant vacuum pump shaft structure according to claim 3, characterized in that: A helical blade (12) is fixedly installed at the center of the outside of the pump shaft body (4), and a corrosion-resistant coating (13) is provided on both sides of the pump shaft body (4) located on the outside of the helical blade (12).

5. The high-strength corrosion-resistant vacuum pump shaft structure according to claim 4, characterized in that: The upper end, front and rear ends of the first pump body shell (1) and the front and rear ends of the second pump body shell (2) are provided with a number of heat dissipation grooves (11), which are equidistantly distributed.

6. The high-strength corrosion-resistant vacuum pump shaft structure according to claim 5, characterized in that: Both sides of the first pump body shell (1) and the second pump body shell (2) are fixedly provided with sealing rings (3), which are located on the outside of the pump shaft body (4).

7. The high-strength corrosion-resistant vacuum pump shaft structure according to claim 6, characterized in that: The second pump body shell (2) has brackets (9) fixedly installed on both sides of the lower end. The first pump body shell (1) has an air outlet pipe (10) fixedly installed at the upper end. The air outlet pipe (10) is connected to the inside of the first pump body shell (1). The second pump body shell (2) has an air inlet pipe (16) fixedly installed at the center of the lower end. The air inlet pipe (16) is connected to the inside of the second pump body shell (2).

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