A high-speed turbine vacuum pump

Abstract

The present invention relates to the technical field of vacuum pumps, and specifically to a high-speed turbine vacuum pump, comprising: a guide housing, a pump shaft is movably installed through the middle of the guide housing, and a plurality of turbine assemblies with equal spacing and linear distribution are installed on the outer side of the pump shaft; the pump shaft is cylindrical, and a plurality of fixed bosses with equal spacing and linear distribution are fixedly sleeved on the outer side; an annular sleeve is fixedly installed in the middle of the turbine assembly, the annular sleeve is slidably sleeved on the outer side of the fixed boss through a polygonal through groove, and a staggered notch is sleeved on the outer side of the end of the movable boss; the beneficial effect is: by fixing a plurality of fixed bosses with equal spacing and sleeved on the pump shaft, the outer sides of the fixed bosses and the movable bosses are sleeved with turbine assemblies, when the pump shaft rotates, the plurality of turbine assemblies can rotate synchronously, and when the turbine assembly is disassembled and replaced, the limit stopper at one end of the pump shaft is removed, and the turbine assembly can be disassembled, repaired, replaced, etc.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, in particular to a high-speed turbine vacuum pump. Background Art

[0002] A vacuum pump is a type of equipment that uses mechanical, physical, or chemical methods to evacuate air from a container to create a vacuum state inside or near the container. Vacuum pumps are widely used in metallurgy, chemical industry, food, electronic coating, and other fields.

[0003] In the prior art, in order to improve the vacuum pump's vacuuming capacity, a multi-stage pump body is set inside the vacuum pump, and the vacuuming performance is improved by optimizing the flow pattern of the airflow in the vacuum pump. At the same time, this can also use less motors and working power to obtain better vacuuming performance, and is therefore more energy-efficient.

[0004] For high-speed, multi-stage turbine vacuum pumps, in order to ensure installation stability, multiple groups of turbines are generally fixed to the pump shaft by welding, or installed using bolts and other connectors. However, when the pump shaft rotates, a relatively strong torque will be generated between the pump shaft and the turbine, and when the turbine vacuumizes the gas, the turbine itself will also be subjected to the reverse thrust of the gas in the axial direction. After long-term use, the connector between the turbine and the pump shaft is prone to deformation and damage, making it difficult to disassemble and replace later. To this end, the present invention proposes a high-speed turbine vacuum pump for solving the above problems. Summary of the invention

[0005] The object of the present invention is to provide a high-speed turbine vacuum pump to solve the problem in the above-mentioned background technology that the turbine is difficult to disassemble and replace after long-term use.

[0006] To achieve the above object, the present invention provides the following technical solution: a high-speed turbine vacuum pump, comprising:

[0007] A flow guide housing, wherein a pump shaft is movably installed in the middle of the flow guide housing, and a plurality of turbine assemblies linearly distributed at equal intervals are installed on the outer side of the pump shaft;

[0008] The pump shaft is cylindrical, and a plurality of fixed bosses with equal spacing and linear distribution are arranged on the outer fixed sleeve, a movable boss is arranged between two adjacent fixed bosses, and the movable boss is rotatably sleeved on the outer side of the pump shaft, and the cross-sectional dimensions of the movable boss and the fixed boss are consistent and staggered with each other;

[0009] The turbine assembly includes a guide plate 1 and a guide plate 2, and a plurality of guide blades 1 distributed in a ring array are fixedly connected at the edge between the two. The guide blades 1 are arc-shaped and inclined. An annular sleeve 1 is fixedly installed in the middle of the turbine assembly. A polygonal through groove 1 is penetrated through the inside of the annular sleeve 1. An offset notch 1 is provided on the inner wall of one end of the polygonal through groove 1. The cross-sectional dimensions of the offset notch 1 and the polygonal through groove 1 are consistent and are offset from each other. The annular sleeve 1 is slidably sleeved on the outer side of the fixed boss through the polygonal through groove 1, and the offset notch is sleeved on the outer side of the end of the movable boss.

[0010] Preferably, a limit stop is fixedly installed on the outer side of the end of the fixed boss at one end of the pump shaft by bolts, and the limit stop blocks the front of a turbine assembly. A limit stop ring is installed on the other end of the pump shaft, and the limit stop ring blocks the back of another turbine assembly.

[0011] Preferably, the limit stop ring is made by splicing two semicircular rings, and the surface of the pump shaft is provided with an annular groove for the limit stop ring to be mounted on. The limit stop ring is fixedly connected to the fixed boss at the other end of the pump shaft by bolts, and there are multiple limit stops distributed in an annular array around the fixed boss.

[0012] Preferably, the movable boss is made by splicing two metal plates with a "<"-shaped cross-section and symmetrical to each other. The movable boss itself is fixed by bolts and rotatably sleeved on the outside of the pump shaft. The fixed boss, movable boss and annular sleeve 1 are of the same length. The movable boss and the fixed boss are rotationally misaligned, the annular sleeve 1 and the fixed boss are slidingly misaligned, and a bearing is sleeved on the outside of one end of the annular sleeve 1.

[0013] Preferably, the turbine assembly also includes an air suction cylinder 1 fixed to the side of the guide plate 2, and the air suction cylinder 1 is in the shape of a trumpet with an opening that gradually increases. A gap is left between the air suction cylinder 1 and the annular sleeve 1, and a plurality of air suction blades 1 distributed in a circular array are arranged in the gap. The guide plate 1, the guide blade 1, the guide plate 2, the air suction cylinder 1, the air suction blade 1 and the annular sleeve 1 are welded and fixed in sequence.

[0014] Preferably, the turbine assembly includes an annular sleeve 2 and a sleeve retaining ring which are spliced ​​to each other, the outer side of the annular sleeve 2 is movably sleeved with a guide plate 3 and a connecting sleeve, the outer side of the connecting sleeve is sleeved with a guide plate 4 and an air suction cylinder 2 which are concentric therewith, a plurality of air suction blades 2 distributed in a circular array are fixedly connected between the air suction cylinder 2 and the connecting sleeve, a side of the guide plate 3 close to the guide plate 4 is fixedly connected with a plurality of guide blades 2 distributed in a circular array, and the side edge of the guide blade 2 is in contact with the guide plate 4.

[0015] Preferably, the sleeve retaining ring and the annular sleeve are both provided with a polygonal through groove II in the middle, and the inner wall of one end of the sleeve retaining ring is also provided with an offset notch II which is offset with the polygonal through groove II, and a countersunk screw hole is provided at the bottom of the offset notch II, and the sleeve retaining ring and the annular sleeve II are fixedly connected by connecting studs, the outer fixed sleeve of the sleeve retaining ring is provided with an anti-slip retaining ring and abuts against the other side of the guide plate III, and the outer fixed sleeve of the annular sleeve II is provided with an installation retaining ring and abuts against one end of the connecting sleeve.

[0016] Preferably, one end of the connecting sleeve is provided with a plurality of anti-rotation protrusions distributed in a circular array, the side of the mounting retaining ring is provided with anti-rotation grooves corresponding one to one to the plurality of anti-rotation protrusions, the surface of the anti-detachment retaining ring and the surface of the guide plate three are respectively provided with a linkage slot and a linkage through groove, the other end of the connecting sleeve is fixedly connected with a linkage plug-in block, the linkage plug-in block passes through the linkage through groove and is inserted into the inner cavity of the linkage slot, and the linkage slots, linkage through grooves and linkage plug-in blocks are all provided in plurality and distributed in a circular array.

[0017] Preferably, the middle part of one side of the turbine assembly is an air intake port, and the edge of the turbine assembly is an air exhaust port. The cross-section of the turbine assembly along its own diameter direction is "L"-shaped, and rounded corners are provided at the corners. Air enters the inner cavity of the turbine assembly axially from the air intake port of the turbine assembly and is discharged radially from the air exhaust port of the turbine assembly. The size of the inner cavity of the turbine assembly gradually decreases along the direction of air flow.

[0018] Preferably, gearboxes are installed at both ends of the deflector shell, and the output shafts of the two gearboxes are respectively connected to the two ends of the pump shaft in a transmission manner. A vacuum pipe is arranged on the outside of the gearbox, and a guide air duct for connecting the suction and exhaust ports of two adjacent turbine assemblies is opened at the edge of the interior of the deflector shell. The vacuum pipe is connected to the guide air duct located at the end of the deflector shell through a connecting pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention has a plurality of fixed bosses with equal spacing on the pump shaft, a movable boss that can rotate around the pump shaft is arranged between two adjacent fixed bosses, a turbine assembly is arranged on the outer sides of the fixed boss and the movable boss, and after the movable boss is rotated to be misaligned with the fixed boss, the turbine assembly can be prevented from moving and misaligning along the axial direction of the pump shaft. An annular sleeve is arranged in the middle of the turbine assembly, and a polygonal through groove is opened through the middle of the annular sleeve. The cross sections of the polygonal through groove, the fixed boss and the movable boss are all polygonal structures, so that the turbine assembly can keep rotating synchronously with the pump shaft after installation, and a through groove is opened at one end of the polygonal through groove. An offset groove is provided, the cross section of the offset groove is consistent with the cross section of the polygonal through groove but they are offset from each other, the fixed boss is located in the polygonal through groove, and the end of the movable boss is located in the offset groove, so that the relative position of the movable boss and the fixed boss remains fixed. When the pump shaft rotates, multiple turbine assemblies can rotate synchronously. When it is necessary to disassemble and replace the turbine assembly, it is only necessary to remove the limit block at one end of the pump shaft. At this time, the turbine assembly outside the fixed boss can be directly removed, and then the movable boss is rotated to align it with the fixed boss, and the turbine assembly outside the movable boss can be removed, so as to facilitate the disassembly, maintenance, replacement and other operations of the turbine assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the internal structure of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection between the turbine assembly and the pump shaft structure of the present invention;

[0023] Figure 3 It is a three-dimensional schematic diagram of the pump shaft structure of the present invention;

[0024] Figure 4 This is an exploded schematic diagram of the pump shaft structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the assembly of the turbine assembly and the movable boss structure of the present invention;

[0026] Figure 6 It is a three-dimensional schematic diagram of the structure of the turbine assembly of the present invention;

[0027] Figure 7 It is a three-dimensional schematic diagram of the turbine assembly structure of the present invention from another perspective;

[0028] Figure 8 It is an exploded schematic diagram of a turbine assembly structure in another embodiment of the present invention;

[0029] Fig. 9 It is a schematic diagram of the separation of the annular sleeve 2 and the sleeve retaining ring structure in another embodiment of the present invention;

[0030] Fig.10This is a schematic diagram of the separation of the guide plate three and the guide plate four structures in another embodiment of the present invention.

[0031] In the figure: 1, guide housing; 101, guide air duct; 2, pump shaft; 21, fixed boss; 22, limit stop ring; 23, movable boss; 24, limit stop block; 3, turbine assembly; 31, annular sleeve 1; 32, guide plate 1; 33, guide plate 2; 34, guide blade 1; 35, suction cylinder 1; 36, suction blade 1; 37, polygonal through groove 1; 38, offset notch 1; 301, annular sleeve 2; 302, sleeve stop ring; 303, guide plate 3; 304, guide plate Four; 305, guide blade two; 306, suction tube two; 307, suction blade two; 308, connecting sleeve; 309, anti-rotation protrusion; 310, polygonal through groove two; 311, mounting retaining ring; 312, anti-rotation groove; 313, offset notch two; 314, countersunk screw hole; 315, connecting stud; 316, anti-slip retaining ring; 317, linkage slot; 318, linkage through groove; 319, linkage plug; 4, bearing; 5, gearbox; 6, vacuum pipe; 7, connecting pipe. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0036] See also Figures 1 to 10 , the present invention provides a technical solution:

[0037] Embodiment 1, as Figures 1 to 7 As shown, a high-speed turbine vacuum pump comprises: a flow guide shell 1.

[0038] Specifically, a pump shaft 2 is installed in the middle of the deflector shell 1, and the pump shaft 2 can rotate inside the deflector shell 1. A plurality of turbine assemblies 3 with equal spacing and linear distribution are installed on the outside of the pump shaft 2. The plurality of turbine assemblies 3 cooperate with each other to form a multi-stage vacuum pumping system, which can improve the overall vacuum pumping performance of the device.

[0039] Secondly, the pump shaft 2 is cylindrical, and the outer fixed sleeve is provided with a plurality of fixed bosses 21 which are linearly distributed with equal spacing, such as Figure 3 and Figure 4 As shown, the fixed boss 21 and the pump shaft 2 are an integrally formed structure, or the fixed boss 21 is sleeved on the outside of the pump shaft 2 and then the two are welded and fixed. In comparison, the stability and strength of the integrally formed structure are higher, but the processing technology is slightly complicated. Although the stability and strength of the welding fixation are slightly weaker than the integrally formed structure, the processing technology of the fixed boss 21 and the pump shaft 2 is simpler. For this device, both connection methods of the fixed boss 21 and the pump shaft 2 are possible. In addition, a movable boss 23 is provided between two adjacent fixed bosses 21, and the movable boss 23 is rotatably sleeved on the outside of the pump shaft 2. The cross-sectional dimensions of the movable boss 23 and the fixed boss 21 are consistent and staggered with each other. Figure 3 and Figure 4It can be seen that the movable boss 23 is installed on the outside of the deflector shell 1 later. If the fixed boss 21 and the pump shaft 2 are an integrally formed structure, the movable boss 23 needs to be set as a two-petal structure, which is respectively sleeved on both sides of the pump shaft 2 and then fixedly connected by bolts. If the fixed boss 21 and the pump shaft 2 are welded and fixed later, the material, size and shape of the movable boss 23 and the fixed boss 21 are exactly the same. Only after being sleeved with the pump shaft 2, the fixed boss 21 is welded to the pump shaft 2, while the movable boss 23 is not welded to the pump shaft 2. In order to distinguish them, the present device records the two as the fixed boss 21 and the movable boss 23 respectively.

[0040] Furthermore, the turbine assembly 3 includes a guide plate 1 32 and a guide plate 2 33, and a plurality of guide blades 1 34 distributed in a ring array are fixedly connected at the edge between the two. The guide blades 1 34 are arc-shaped and inclined. When the turbine assembly 3 rotates, the guide blades 1 34 can squeeze the air between the guide plate 1 32 and the guide plate 2 33, and the squeezing force is proportional to the rotation speed of the turbine assembly 3, and the air is thrown out to the outside from the gap between the guide plate 1 32 and the guide plate 2 33 by centrifugal force. At this time, negative pressure can be formed between the guide plate 1 32 and the guide plate 2 33, and the air on the outside is attracted from the middle of the guide plate 2 33 along the axial direction. In addition, an annular sleeve 1 31 is fixedly installed in the middle of the turbine assembly 3, and a polygonal through groove 1 37 is opened through the inside of the annular sleeve 1 31. The annular sleeve 1 31 is slidably sleeved on the outside of the movable boss 23 (or the fixed boss 21) through the polygonal through groove 1 37, combined with Figure 5 and Figure 6 It can be seen that the cross-sections of the fixed boss 21, the movable boss 23 and the polygonal through groove 137 are all polygonal structures. When the polygonal through groove 137 cooperates with the movable boss 23 (or the fixed boss 21), the movable boss 23 (or the fixed boss 21) can drive the annular sleeve 131 to rotate synchronously with it when rotating. That is to say, the annular sleeve 131 can only move along the length direction of the movable boss 23 (or the fixed boss 21) and will not rotate relative to it. Secondly, an offset notch 138 is provided on the inner wall of one end of the polygonal through groove 137. The cross-sectional dimensions of the offset notch 138 and the polygonal through groove 137 are consistent and offset from each other. The offset notch 138 is sleeved on the outer side of the end of the fixed boss 21 (or the movable boss 23). Figure 5 and Figure 7 As shown in the figure, the annular sleeve 31 is mainly sleeved on the outside of the movable boss 23, but one end of the annular sleeve 31 ( Figure 5The left end in the figure) is sleeved on the outside of the fixed boss 21. Since the polygonal through groove 37 inside the annular sleeve 31 cooperates with the movable boss 23, the offset notch 38 at the end of the annular sleeve 31 can just cooperate with the end of the fixed boss 21. The advantage of this design is that the fixed boss 21, the annular sleeve 31 and the movable boss 23 cooperate in sequence to avoid relative rotation between the movable boss 23 and the fixed boss 21. That is to say, for each turbine assembly 3 of the device, a part of its annular sleeve 31 can cover the outside of the fixed boss 21. Since the fixed boss 21 and the pump shaft 2 are kept fixed, when the pump shaft 2 rotates, all the turbine assemblies 3 can rotate synchronously with it; and when the turbine assembly 3 needs to be disassembled, refer to Figure 5 , by sliding the turbine assembly 3 to the right along the axial direction of the pump shaft 2, the turbine assembly 3 is separated from the fixed boss 21 at its left end, and the movable boss 23 can rotate until the movable boss 23 corresponds to the fixed boss 21. At this time, all the turbine assemblies 3 on the outside of the pump shaft 2 can slide toward the right end of the pump shaft 2 along the length direction of the pump shaft 2, so that all the turbine assemblies 3 can be removed.

[0041] In order to position the turbine assembly 3 at one end of the pump shaft 2, the present application also has a limit stopper 24 fixedly installed on the outer side of the end of the fixed boss 21 located at one end of the pump shaft 2 by bolts, and the limit stopper 24 blocks the front of one turbine assembly 3, and the other end of the pump shaft 2 is installed with a limit stopper ring 22, and the limit stopper ring 22 blocks the back of the other turbine assembly 3, such as Figure 4 As shown, the limit ring 22 and the limit block 24 respectively limit the two turbine assemblies 3 located at both ends of the pump shaft 2, so that after all the turbine assemblies 3 are installed, only the turbine assemblies 3 located at both ends need to be limited. It should be noted that since the limit block 24 and the fixed boss 21 are fixed by bolts, a groove for cooperating with the limit block 24 needs to be opened on the surface of the fixed boss 21, and the depth of the groove is less than the height of the limit block 24. Therefore, the extrusion force generated by the turbine assembly 3 on the limit block 24 along the axial direction of the pump shaft 2 can be transmitted to the inner wall of the groove instead of the bolt, thereby reducing the possibility of bolt deformation.

[0042] In order to position the turbine assembly 3 at the other end of the pump shaft 2, the limit stop ring 22 of the present application is made of two semicircular rings, and the surface of the pump shaft 2 is provided with an annular groove for the limit stop ring 22 to be mounted. A connection structure similar to a retaining spring is formed between the limit stop ring 22 and the pump shaft 2, which can be used to limit the turbine assembly 3. The limit stop ring 22 is fixedly connected to the fixed boss 21 located at the other end of the pump shaft 2 by bolts, which is used to improve the stability of the limit stop ring 22 itself. A plurality of limit stop blocks 24 are provided and are distributed in a ring array around the fixed boss 21.

[0043] In order to support the middle part of the pump shaft 2, the movable boss 23 of the present application is made of two metal plates with a "<"-shaped cross-section and symmetrical to each other. The movable boss 23 itself is fixed by bolts and rotatably sleeved on the outside of the pump shaft 2. Therefore, the movable boss 23 can also be disassembled and replaced after being damaged or deformed after long-term use. The fixed boss 21, the movable boss 23 and the annular sleeve 31 are of the same length. Therefore, the multiple turbine assemblies 3 located in the middle of the pump shaft 2 can be squeezed and positioned against each other, and when disassembly is required, the limit stopper 24 is first removed, and then the turbine assemblies 3 are disassembled by sliding. After the movable turbine assembly 3 makes the turbine assembly 3 on the outside of the movable boss 23 correspond exactly to the movable boss 23, the movable boss 23 can be rotated to correspond to the fixed boss 21, thereby facilitating the removal of other turbine assemblies 3 one by one; after the turbine assembly 3 of the device is installed, the movable boss 23 and the fixed boss 21 are rotated and misaligned, and the annular sleeve 31 and the fixed boss 21 are slidingly misaligned, and a bearing 4 is sleeved on the outer side of one end of the annular sleeve 31, and the bearing 4 can support the middle position of the pump shaft 2 to avoid deformation and bending of the middle part of the pump shaft 2, and at the same time reduce the friction force when the pump shaft 2 rotates.

[0044] In order to draw air into the turbine assembly 3, the turbine assembly 3 of the present application further includes an air suction cylinder 35 fixed to the side of the guide plate 33, and the air suction cylinder 35 is in the shape of a trumpet with a gradually increasing opening, a gap is left between the air suction cylinder 35 and the annular sleeve 31, and a plurality of air suction blades 36 distributed in an annular array are arranged in the gap, and the guide plate 32, the guide blade 34, the guide plate 33, the air suction cylinder 35, the air suction blade 36 and the annular sleeve 31 are welded and fixed in sequence, such as Figure 6 As shown, the gap between the air suction cylinder 35 and the annular sleeve 31 is the air suction port of the turbine assembly 3, and the air suction blade 36 is similar to the auger blade. When the air suction blade 36 rotates, it can suck the air at the opening of the air suction cylinder 35 into between the guide plate 1 32 and the guide plate 2 33, and then the guide blade 1 34 squeezes and throws the air out from the edge of the turbine assembly 3 with the help of centrifugal force, thereby realizing the discharge of air along the radial direction of the turbine assembly 3.

[0045] Embodiment 2, as Figures 8 to 10As shown, in order to facilitate the disassembly and replacement of the turbine assembly 3, the turbine assembly 3 of the present application may also include an annular sleeve 2 301 and a sleeve retaining ring 302 spliced ​​to each other, the outer side of the annular sleeve 2 301 is movably sleeved with a guide plate 303 and a connecting sleeve 308, the outer side of the connecting sleeve 308 is sleeved with a guide plate 4 304 and an air suction cylinder 2 306 concentric therewith, a plurality of air suction fan blades 2 307 distributed in an annular array are fixedly connected between the air suction cylinder 2 306 and the connecting sleeve 308, the guide plate 303 is sleeved with a guide plate 4 304 and an air suction cylinder 2 306 concentric therewith, and a plurality of air suction fan blades 2 307 distributed in an annular array are fixedly connected between the air suction cylinder 2 306 and the connecting sleeve 308, and the guide plate 303 is sleeved with a guide plate 4 304 and an air suction cylinder 2 306 concentric therewith. 03 A plurality of guide blades 2 305 distributed in a circular array are fixedly connected to one side surface close to the guide plate 4 304, and the side edge of the guide blade 2 305 is in contact with the guide plate 4 304. The difference from the first embodiment is that in this embodiment, the guide plate 3 303 and the guide plate 4 304, as well as the annular sleeve 2 301 and the sleeve retaining ring 302 are all separated structures. When the turbine assembly 3 is damaged, the damaged part can be removed and replaced according to the actual situation, thereby reducing the material cost when replacing the equipment.

[0046] In order to pre-install the turbine assembly 3, the present application also has a polygonal through groove 2 310 in the middle of the sleeve retaining ring 302 and the annular sleeve 2 301. The shape, size and function of the polygonal through groove 2 310 are consistent with the polygonal through groove 1 37 in the first embodiment, and are used for installation in coordination with the fixed boss 21 (or the movable boss 23). The inner wall of one end of the sleeve retaining ring 302 is also provided with an offset notch 2 313 which is offset with the polygonal through groove 2 310. The bottom of the offset notch 2 313 is provided with a countersunk screw hole 314. The sleeve retaining ring 302 and the annular sleeve 2 301 are fixedly connected by a connecting stud 315. An anti-slip retaining ring 316 is provided on the outer fixed sleeve of the sleeve retaining ring 302 and Against the other side of the guide plate three 303, the outer fixed sleeve of the annular sleeve two 301 is provided with an installation retaining ring 311 and abuts against one end of the connecting sleeve 308. The turbine assembly 3 of the device can be pre-installed, specifically as follows: the guide plate four 304 and the guide plate three 303 are sequentially sleeved on the outside of the annular sleeve two 301, and then the sleeve retaining ring 302 is fixedly connected to the end of the annular sleeve two 301 by connecting studs 315. At this time, the anti-slip retaining ring 316 and the installation retaining ring 311 respectively position the guide plate three 303 and the guide plate four 304, so that the annular sleeve two 301, the sleeve retaining ring 302, the guide plate three 303, and the guide plate four 304 form a complete turbine assembly 3.

[0047] In order to drive the guide plate three 303 and the guide plate four 304 to rotate, the present application also has a plurality of anti-rotation protrusions 309 distributed in a ring array at one end of the connecting sleeve 308, and an anti-rotation groove 312 corresponding to the plurality of anti-rotation protrusions 309 is opened on the side of the mounting retaining ring 311. After the guide plate four 304 is sleeved on the outer side of the annular sleeve two 301 and the anti-rotation protrusions 309 correspond to the anti-rotation grooves 312, the guide plate four 304 cannot rotate on the outer side of the annular sleeve two 301, so as to facilitate the subsequent cooperation with the guide plate three 303. Secondly, the surface of the anti-detachment retaining ring 316 and the surface of the guide plate three 303 are respectively provided with a linkage slot 317 and a linkage through slot 318, and the other end of the connecting sleeve 308 is fixedly connected with a linkage plug block 319, which passes through the linkage through slot 318 and is inserted into the inner cavity of the linkage slot 317. After the guide plate four 304 is installed, The guide plate three 303 is sleeved on the outside of the annular sleeve two 301. At this time, the linkage block 319 on the guide plate four 304 can pass through the linkage slot 318, so that the guide plate three 303 and the guide plate four 304 remain relatively fixed. Finally, the linkage block 319 is inserted into the inner cavity of the linkage slot 317. When the sleeve retaining ring 302 rotates, the sleeve retaining ring 302 can drive the guide plate three 303 and the guide plate four 304 to rotate synchronously with the linkage block 319. Since the offset slot two 313 at the end of the sleeve retaining ring 302 is sleeved on the outside of the end of the fixed boss 21, the pump shaft 2 of the device can drive the turbine assembly 3 in this embodiment to rotate synchronously when it rotates. In addition, the linkage slot 317, the linkage slot 318 and the linkage block 319 are all provided in plurality and distributed in a ring array, which can be used to improve the connection strength between the sleeve retaining ring 302, the guide plate three 303 and the guide plate four 304.

[0048] In order to describe the air flow path, the middle part of one side of the turbine assembly 3 of the present application is an air intake port, and the edge of the turbine assembly 3 is an air exhaust port. The air enters the inner cavity of the turbine assembly 3 axially from the air intake port of the turbine assembly 3 and is discharged radially from the air exhaust port of the turbine assembly 3. The size of the inner cavity of the turbine assembly 3 gradually decreases along the air flow direction, such as Figure 5 As shown, in Example 1 and Example 2 of the present application, the inner cavity cross-section of the turbine assembly 3 is: the cross-section along its own diameter direction is "L"-shaped, and rounded corners are provided at the corners; so that air can be axially sucked in along the pump shaft 2 and radially discharged along the turbine assembly 3. In addition, the trumpet-shaped air intake port can increase the air intake range of the device and improve the vacuum performance.

[0049] In order to drive the pump shaft 2 to rotate, the present application also has gearboxes 5 installed at both ends of the deflector shell 1, and the output shafts of the two gearboxes 5 are respectively connected to the two ends of the pump shaft 2 for driving, so as to provide power for the rotation of the pump shaft 2. A vacuum pipe 6 is arranged on the outside of the gearbox 5. It should be noted that: bases are arranged at both ends of the deflector shell 1 for installing and positioning the gearbox 5. Although the vacuum pipe 6 is located on the outside of the gearbox 5, it is not fixedly connected to the outside of the gearbox 5, but is installed on the base. In addition, a guide air duct 101 for connecting the suction and exhaust ports of two adjacent turbine assemblies 3 is provided at the edge of the interior of the deflector shell 1. The vacuum pipe 6 is connected to the guide air duct 101 located at the end of the deflector shell 1 through a connecting pipe 7, so that Figure 1 The two vacuum pipes 6 are used for suction and exhaust respectively, and the position corresponding to the suction end is the vacuum area.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-speed turbine vacuum pump, characterized in that: include: A flow guide housing (1), wherein a pump shaft (2) is movably installed through the middle of the flow guide housing (1), and a plurality of turbine assemblies (3) are installed on the outer side of the pump shaft (2) and are linearly distributed at equal intervals; The pump shaft (2) is cylindrical, and a plurality of fixed bosses (21) are fixedly sleeved on the outside and are linearly distributed at equal intervals, a movable boss (23) is provided between two adjacent fixed bosses (21), and the movable boss (23) is rotatably sleeved on the outside of the pump shaft (2), and the cross-sectional dimensions of the movable boss (23) and the fixed boss (21) are consistent and mutually offset; The turbine assembly (3) comprises a guide plate 1 (32) and a guide plate 2 (33), and a plurality of guide blades 1 (34) distributed in an annular array are fixedly connected at the edge between the two, the guide blades 1 (34) are arc-shaped and inclined, an annular sleeve 1 (31) is fixedly installed in the middle of the turbine assembly (3), a polygonal through groove 1 (37) is provided inside the annular sleeve 1 (31), an inner wall of one end of the polygonal through groove 1 (37) is provided with an offset notch 1 (38), the cross-sectional dimensions of the offset notch 1 (38) and the polygonal through groove 1 (37) are consistent and are offset from each other, the annular sleeve 1 (31) is slidably sleeved on the outer side of the fixed boss (21) through the polygonal through groove 1 (37), and the offset notch 1 (38) is sleeved on the outer side of the end of the movable boss (23); A limit stopper (24) is fixedly mounted on the outer side of the end of the fixed boss (21) at one end of the pump shaft (2) by means of bolts, the limit stopper (24) blocks the front side of one turbine assembly (3), and a limit stopper ring (22) is mounted on the other end of the pump shaft (2), and the limit stopper ring (22) blocks the back side of another turbine assembly (3); The movable boss (23) is made by splicing two metal plates with a "<" shaped cross section and being symmetrical to each other. The movable boss (23) is fixed by bolts and is rotatably sleeved on the outside of the pump shaft (2). The fixed boss (21), the movable boss (23) and the annular sleeve (31) are of the same length. The movable boss (23) and the fixed boss (21) are rotationally misaligned, and the annular sleeve (31) and the fixed boss (21) are slidingly misaligned. A bearing (4) is sleeved on the outside of one end of the annular sleeve (31).

2. A high-speed turbine vacuum pump according to claim 1, characterized in that: The limit stop ring (22) is made by splicing two semicircular rings, and the surface of the pump shaft (2) is provided with an annular groove for the limit stop ring (22) to be sleeved, and the limit stop ring (22) is fixedly connected to the fixed boss (21) at the other end of the pump shaft (2) by bolts, and a plurality of limit stops (24) are provided and distributed in an annular array around the fixed boss (21).

3. A high-speed turbine vacuum pump according to claim 2, characterized in that: The turbine assembly (3) further comprises an air suction cylinder (35) fixed to the side of the second guide plate (33), and the air suction cylinder (35) is in the shape of a trumpet with an opening gradually increasing. A gap is left between the air suction cylinder (35) and the annular sleeve (31), and a plurality of air suction blades (36) distributed in an annular array are arranged in the gap. The guide plate (32), the guide blades (34), the second guide plate (33), the air suction cylinder (35), the air suction blades (36) and the annular sleeve (31) are welded and fixed in sequence.

4. A high-speed turbine vacuum pump according to claim 1, characterized in that: The turbine assembly (3) comprises an annular sleeve 2 (301) and a sleeve retaining ring (302) which are spliced ​​to each other; a guide plate 3 (303) and a connecting sleeve (308) are movably sleeved on the outer side of the annular sleeve 2 (301); a guide plate 4 (304) and an air suction tube 2 (306) which are concentric therewith are sleeved on the outer side of the connecting sleeve (308); a plurality of air suction blades 2 (307) which are distributed in an annular array are fixedly connected between the air suction tube 2 (306) and the connecting sleeve (308); a plurality of guide blades 2 (305) which are distributed in an annular array are fixedly connected to a side surface of the guide plate 3 (303) close to the guide plate 4 (304); and a side edge of the guide blade 2 (305) is in contact with the guide plate 4 (304).

5. A high-speed turbine vacuum pump according to claim 4, characterized in that: The sleeve retaining ring (302) and the annular sleeve (301) are both provided with a second polygonal through groove (310) in the middle, and an inner wall at one end of the sleeve retaining ring (302) is also provided with a second offset notch (313) which is offset from the second polygonal through groove (310), and a countersunk screw hole (314) is provided at the bottom of the second offset notch (313). The sleeve retaining ring (302) and the second annular sleeve (301) are fixedly connected via a connecting stud (315), an outer fixed sleeve of the sleeve retaining ring (302) is provided with an anti-slip retaining ring (316) which abuts against the other side of the guide plate (303), and an outer fixed sleeve of the second annular sleeve (301) is provided with a mounting retaining ring (311) which abuts against one end of the connecting sleeve (308).

6. A high-speed turbine vacuum pump according to claim 5, characterized in that: One end of the connecting sleeve (308) is provided with a plurality of anti-rotation protrusions (309) distributed in an annular array, a side surface of the mounting retaining ring (311) is provided with anti-rotation grooves (312) corresponding one to one with the plurality of anti-rotation protrusions (309), a surface of the anti-detachment retaining ring (316) and a surface of the guide plate three (303) are respectively provided with a linkage slot (317) and a linkage through slot (318), and the other end of the connecting sleeve (308) is fixedly connected with a linkage plug block (319), the linkage plug block (319) passes through the linkage through slot (318) and is inserted into the inner cavity of the linkage slot (317), and a plurality of the linkage slots (317), the linkage through slots (318) and the linkage plug block (319) are provided and distributed in an annular array.

7. A high-speed turbine vacuum pump according to claim 3 or 6, characterized in that: The middle part of one side of the turbine assembly (3) is an air intake port, and the edge of the turbine assembly (3) is an air outlet. The cross section of the turbine assembly (3) along its own diameter direction is in an "L" shape, and a rounded corner is provided at the corner. Air enters the inner cavity of the turbine assembly (3) axially from the air intake port of the turbine assembly (3) and is discharged radially from the air outlet of the turbine assembly (3). The size of the inner cavity of the turbine assembly (3) gradually decreases along the air flow direction.

8. A high-speed turbine vacuum pump according to claim 7, characterized in that: Gearboxes (5) are installed at both ends of the deflector shell (1), and the output shafts of the two gearboxes (5) are respectively connected to the two ends of the pump shaft (2) in a driving manner. A vacuum pipe (6) is arranged on the outside of the gearbox (5). A deflector air duct (101) for connecting the air intake and exhaust ports of two adjacent turbine assemblies (3) is provided at the edge of the interior of the deflector shell (1). The vacuum pipe (6) is connected to the deflector air duct (101) located at the end of the deflector shell (1) via a connecting pipe (7).

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