Roots vacuum pump

Abstract

The utility model relates to a Roots vacuum pump which comprises a base, the inner wall of the base is rotatably connected with a driven spiral bevel gear, the outer wall of the base is fixedly connected with supporting blocks which are symmetrically distributed, the Roots vacuum pump further comprises an adjusting clamping assembly, the adjusting clamping assembly comprises two sets of screws which are rotatably connected to the inner wall of the base, and the two sets of screws are arranged on the base. And the outer wall of the screw rod is fixedly connected with a driving spiral bevel gear, the driving spiral bevel gear is connected with the driven spiral bevel gear in a meshed mode, the outer wall of the screw rod is in threaded connection with a sliding block, and the sliding block is slidably connected with the base. According to the Roots vacuum pump cooling device, the driven spiral bevel gear is arranged to rotate, the screw is driven to rotate through transmission of the spiral bevel gear, the sliding block slides on the base, then the mounting plate and the positions of all structures on the mounting plate including the cooling fan are adjusted, cooling operation can be conveniently conducted on Roots vacuum pumps of different sizes, the universality is high, and the service life is long. And the flexibility is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to roots vacuum pump technical field especially relates to a roots vacuum pump. BACKGROUND

[0002] Roots vacuum pump is an important vacuum pump type, it rotates in the pump shell through two or more "8" shaped rotor at high speed, realizes gas suction, compression and discharge. Its structure contains pump shell, drive motor, rotor set and gear set etc., when working, rotor set rotates under the drive of drive motor, and gear set cooperation guarantees synchronous reverse rotation, gas enters from the air inlet, is captured and taken to the exhaust port by the space between the rotor and is discharged, has the characteristics such as fast air extraction speed, higher vacuum degree, compact structure, is widely used in electronic, chemical industry, pharmacy, food and many other industrial fields to obtain vacuum environment, plays a key role to production process and product quality.

[0003] The rotor set, gear set and other components of roots vacuum pump will generate heat during operation, if the heat dissipation is poor, the temperature of these components will rise, high temperature can change the material properties of rotor and gear, for example, cause the strength and hardness of metal material to decline, thereby affecting their meshing accuracy and transmission efficiency. In addition, high temperature can also make the lubrication performance of bearing worse, increase the friction resistance, reduce the rotation speed of rotor, and thus reduce the overall working efficiency of the pump.

[0004] Through the search, Chinese patent CN221838536U discloses a roots vacuum pump, which comprises a pump shell, a drive motor, a rotor set and a gear set. The drive motor is connected to one end of the pump shell, the gear set is located at the other end of the pump shell, the two ends of the rotor set are rotatably connected to the pump shell, and one end of the rotor set is connected to the gear set. The other end of the rotor set passes through the pump shell and extends into the drive motor, and the drive motor is connected to the rotor set and used to drive the rotation of the rotor set. The outer surface of the pump shell is provided with a first pressure balance hole, and the rotor set is provided with a second pressure balance hole. One end of the second pressure balance hole is communicated with the first pressure balance hole, and the other end of the second pressure balance hole faces the drive motor and / or the gear set.

[0005] Although the first pressure balance hole and the second pressure balance hole are respectively arranged in the pump shell and the rotor set in the above patent, the internal airflow balance effect of the Roots vacuum pump is achieved, the internal pressure of the Roots vacuum pump can be balanced, the normal operation of the machine body is realized, the transmission efficiency of the whole machine can be effectively improved during the operation of the Roots vacuum pump, the abnormal problem of the rotor set is reduced, and the service life of the whole machine is greatly improved, but the following problems still exist during use: The Roots vacuum pump mainly relies on the circulation of the cooling liquid in the water jacket inside the driving motor to cool and heat the driving motor. Although this water cooling method has certain improvement in heat dissipation efficiency compared with the traditional air cooling, the overall heat dissipation system is insufficient in targeted heat dissipation measures for other key parts (such as the rotor set, the gear set and the inner cavity of the pump shell) of the pump body, and only the water cooling of the driving motor may not be able to effectively dissipate the heat generated by the whole pump body in time under the working conditions of long-time high-load operation or high-temperature environment, so that the heat accumulates in the pump, affecting the performance and service life of the pump.

[0006] Therefore, there is an urgent need for a Roots vacuum pump to solve the above problems. SUMMARY

[0007] The utility model discloses a Roots vacuum pump which overcomes the above-mentioned deficiencies.

[0008] The utility model discloses a Roots vacuum pump which overcomes the above-mentioned deficiencies.

[0009] A Roots vacuum pump, comprising a base, a driven spiral bevel gear is rotatably connected to the inner wall of the base, and symmetrically distributed support blocks are fixedly connected to the outer wall of the base, further comprising:

[0010] An adjusting and clamping assembly is provided, which comprises a screw rod rotatably connected to the inner wall of the base, and the screw rod is provided with two groups, a driving spiral bevel gear is fixedly connected to the outer wall of the screw rod, the driving spiral bevel gear is meshed and connected with the driven spiral bevel gear, a sliding block is threadedly connected to the outer wall of the screw rod, the sliding block is slidably connected with the base, a connecting block is fixedly connected to the top wall of the sliding block, an installation plate is fixedly connected to the top wall of the connecting block, and a heat dissipation fan is fixedly connected to the outer wall of the installation plate.

[0011] A heat dissipation assembly is provided on the outer wall of the installation plate.

[0012] Further, the heat dissipation assembly comprises a heat insulation sleeve uniformly fixedly connected to the inner wall of the installation plate, heat conduction rods uniformly distributed are slidably connected to the inner wall of the heat insulation sleeve, heat dissipation plates uniformly distributed are slidably connected to the outer wall of the heat conduction rods, the heat dissipation plates are fixedly connected with the installation plate, strong tension springs are sleeved on the outer wall of the heat conduction rods, the strong tension springs are fixedly connected with the installation plate, one end of the strong tension spring away from the installation plate is fixedly connected with the heat conduction rod, heat conduction fins are fixedly connected to the outer wall of the heat conduction rod, and a shell is arranged at the end of the heat conduction fin away from the heat conduction rod.

[0013] Further, the heat-conducting rod is fixedly connected with a limiting block at one end away from the heat-conducting sheet.

[0014] Further, the inner wall of the shell is rotationally connected with symmetrically distributed rotating rods, the outer wall of the rotating rod is fixedly connected with a rotor, the outer wall of the rotating rod is also fixedly connected with bevel gears, and the symmetrically distributed bevel gears are meshingly connected.

[0015] Further, the outer wall of the connecting frame is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with the rotating rod.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The heat-conducting sheet contacts the shell of the pump and is provided with a heat dissipation structure composed of a heat-conducting rod and a heat sink, the heat-conducting sheet dissipates heat, the heat sink has a large heat dissipation area and can quickly dissipate heat to the surrounding air, effectively reducing the temperature of the shell, and the setting of the strong tension spring ensures that the heat-conducting rod always maintains good contact with the shell when the temperature changes, providing a stable heat conduction path, thereby reducing equipment failure and performance degradation caused by temperature changes, improving the overall heat dissipation performance of the Roots vacuum pump, ensuring that the equipment operates within a suitable temperature range, prolonging the service life of the equipment, and solving the problem that in the prior art, only water cooling of the driving motor may not be able to effectively dissipate the heat generated by the entire pump body in time under the working conditions of long-time high-load operation or high-temperature environment, causing heat accumulation in the pump and affecting the performance and service life of the pump.

[0018] The driven helical bevel gear is rotated, the helical bevel gear transmission drives the screw to rotate, the sliding block on the base is slid, the position of the mounting plate and all structures including the heat dissipation fan on the mounting plate is adjusted, thereby facilitating heat dissipation operation of Roots vacuum pumps of different sizes, and the universal applicability is high and the flexibility is high. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is one of the overall structure schematic views of the present application.

[0020] Figure 2 It is the second overall structure schematic view of the present application.

[0021] Figure 3 It is a base sectional view of the present application.

[0022] Figure 4 It is a heat sink partial structure schematic view of the present application.

[0023] Figure 5The shell cross-sectional view of the utility model.

[0024] Among them:

[0025] 1, base; 2, connecting block; 3, screw; 4, support block; 5, mounting plate; 6, driven spiral bevel gear; 7, drive spiral bevel gear; 8, heat sink; 9, heat conduction rod; 10, limit block; 11, strong tension spring; 12, heat insulation sleeve; 13, heat conduction sheet; 14, cooling fan; 15, shell; 16, rotating rod; 17, helical gear; 18, rotor; 19, connecting frame; 20, drive motor; 21, sliding block. DETAILED DESCRIPTION

[0026] In order to better understand the technical scheme of the utility model, the following will be combined with relevant drawings to make detailed description. It should be understood that the following specific examples are not used to limit the specific implementation of the technical scheme of the utility model, and it is only an implementation of the technical scheme of the utility model. It should be pointed out that the description of the position relationship of each component in this paper, such as A component is located above B component, is based on the relative position of each component in the drawing, and is not used to limit the actual position relationship of each component. Example 1

[0027] Referring to Figures 1-5 , Figure 1 The structure diagram of the utility model is drawn. As shown in the figure, a Roots vacuum pump, it includes base 1, the inner wall of base 1 is rotatably connected with driven spiral bevel gear 6, the outer wall of base 1 is fixedly connected with symmetrically distributed support block 4, further comprising:

[0028] Adjusting and clamping assembly, adjusting and clamping assembly includes screw 3 rotatably connected to the inner wall of base 1, and screw 3 is provided with two groups, the outer wall of screw 3 is fixedly connected with drive spiral bevel gear 7, and drive spiral bevel gear 7 is connected with driven spiral bevel gear 6 in meshing, the outer wall of screw 3 is threadedly connected with sliding block 21, and sliding block 21 is slidably connected with base 1, the top wall of sliding block 21 is fixedly connected with connecting block 2, the top wall of connecting block 2 is fixedly connected with mounting plate 5, the outer wall of mounting plate 5 is fixedly connected with cooling fan 14, the knob (not marked in the figure) rotating on the outer wall of left screw 3, the left screw 3 is driven to rotate by the knob, in turn, driven spiral bevel gear 6 is driven to rotate, in turn, drive spiral bevel gear 7 is driven to rotate by meshing, and driven spiral bevel gear 6 on the right is driven to rotate by meshing transmission of drive spiral bevel gear 7, so that screw 3 on the right is driven to rotate, at this time, the rotating direction of left screw 3 and right screw 3 is opposite, so that sliding block 21 is driven to slide on base 1 in opposite or opposite directions, when sliding block 21 slides, connecting block 2 fixedly connected with the top wall drives mounting plate 5 to move;

[0029] Heat dissipation assembly, provided on the outer wall of mounting plate 5.

[0030] The heat dissipation assembly comprises a heat insulation sleeve 12 uniformly fixedly connected to the inner wall of the mounting plate 5, the heat conduction rods 9 uniformly distributed are slidably connected to the inner wall of the heat insulation sleeve 12, the heat dissipation plates 8 uniformly distributed are slidably connected to the outer wall of the heat conduction rods 9, the heat dissipation plates 8 are fixedly connected with the mounting plate 5, the strong tension spring 11 is sleeved on the outer wall of the heat conduction rods 9, the strong tension spring 11 is fixedly connected with the mounting plate 5, one end of the strong tension spring 11 away from the mounting plate 5 is fixedly connected with the heat conduction rods 9, the heat conduction fins 13 are fixedly connected to the outer wall of the heat conduction rods 9, the shell 15 is arranged at one end of the heat conduction fins 13 away from the heat conduction rods 9, when the sliding block 21 slides, the connecting block 2 fixedly connected to the top wall drives the mounting plate 5 to move, thereby the position of the heat dissipation fan 14 mounted on the outer wall of the mounting plate 5 is adjusted, and the heat conduction rods 9 and the heat conduction fins 13 are driven to move, when the heat conduction fins 13 contact the shell 15, the heat conduction rods 9 slide in the heat insulation sleeve 12 and the strong tension spring 11 is deformed under the extrusion of the external structure of the shell 15, wherein the heat conduction rods 9 are in contact with the heat dissipation plates 8 during the sliding process, so that the heat conduction fins 13 can transfer heat to the heat dissipation plates 8 during heat transfer, and then the heat dissipation operation is performed through the heat dissipation fan 14.

[0031] One end of the heat conduction rods 9 away from the heat conduction fins 13 is fixedly connected with the limiting block 10, the limiting block 10 limits the position of the heat conduction rods 9 to prevent the heat conduction rods 9 from sliding too far.

[0032] The symmetrically distributed rotating rods 16 are rotatably connected to the inner wall of the shell 15, the rotors 18 are fixedly connected to the outer wall of the rotating rods 16, the bevel gears 17 are also fixedly connected to the outer wall of the rotating rods 16, and the symmetrically arranged bevel gears 17 are meshingly connected, the synchronous rotation of the rotors 18 is realized through the meshing transmission of the bevel gears 17, the cooperation precision between the rotors 18 is ensured, the flow of gas in the pump is more stable and orderly, and problems such as gas leakage and reduced pumping efficiency caused by uncoordinated movement of the rotors 18 are avoided, wherein the meshing transmission of the bevel gears 17 has high transmission efficiency, compared with other transmission modes, the power of the driving motor 20 can be more effectively transmitted to the rotating rods 16, and the energy loss in the transmission process is reduced.

[0033] The connecting frame 19 is fixedly connected to the outer wall of the shell 15, the driving motor 20 is fixedly connected to the outer wall of the connecting frame 19, and the output end of the driving motor 20 is fixedly connected with the rotating rods 16, the rotating rods 16 are driven to rotate through the output end of the driving motor 20, and driving force is provided for the rotation of the rotors 18.

[0034] Working principle:

[0035] The utility model provides a kind of variable pitch double screw rotor, when using: first, according to the need installation base 1, specifically, rotate the knob (not marked in drawing) located in the outer wall of left screw 3, left screw 3 is rotated by knob, further drive driven helical bevel gear 6 to rotate, further meshing drive helical bevel gear 7 to rotate, and driven helical bevel gear 6 located in right side is rotated by drive helical bevel gear 7 meshing transmission, to drive screw 3 located in right side to rotate, left screw 3 and right screw 3 rotating direction are opposite at this time, to drive slider 21 to slide on base 1 in opposite or towards, slider 21 slides, connecting block 2 fixedly connected by top wall drives mounting plate 5 to move, further realize the adjustment of the position of heat dissipation fan 14 installed on the outer wall of mounting plate 5, simultaneously drive heat conduction rod 9 and heat conduction sheet 13 to move, when heat conduction sheet 13 contacts to shell 15, be extruded by the influence of the external structure of shell 15, heat conduction rod 9 slides in heat insulation sleeve 12 and pushes strong tension spring 11 to deform, wherein, heat conduction rod 9 is always contacted with heat dissipation plate 8 during sliding process, so that heat conduction sheet 13 heat transfer can transfer heat to heat dissipation plate 8, further through heat dissipation fan 14 heat dissipation operation.

[0036] The above is only the specific application example of the utility model, and does not constitute any limitation on the protection scope of the utility model. Any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the utility model.

Claims

1. A Roots vacuum pump, characterized in that: The invention comprises a base (1), characterized in that the inner wall of the base (1) is rotatably connected to a driven spiral bevel gear (6), the outer wall of the base (1) is fixedly connected to symmetrically distributed support blocks (4), and further comprises: An adjusting clamping assembly, the adjusting clamping assembly comprising a screw (3) rotatably connected to the inner wall of the base (1), and the screw (3) is provided with two groups, the outer wall of the screw (3) is fixedly connected to a driving spiral bevel gear (7), and the driving spiral bevel gear (7) is meshed and connected with the driven spiral bevel gear (6), the outer wall of the screw (3) is threadedly connected to a slider (21), and the slider (21) is slidably connected to the base (1), the top wall of the slider (21) is fixedly connected to a connecting block (2), the top wall of the connecting block (2) is fixedly connected to a mounting plate (5), and the outer wall of the mounting plate (5) is fixedly connected to a cooling fan (14); The heat dissipation component is arranged on the outer wall of the mounting plate (5).

2. A Roots vacuum pump according to claim 1, characterized in that: The heat dissipation assembly includes a heat insulating sleeve (12) uniformly fixedly connected to the inner wall of the mounting plate (5), the inner wall of the heat insulating sleeve (12) is slidably connected to uniformly distributed heat conducting rods (9), the outer wall of the heat conducting rod (9) is slidably connected to a uniformly distributed heat dissipation plate (8), and the heat dissipation plate (8) is fixedly connected to the mounting plate (5), the outer wall of the heat conducting rod (9) is provided with a strong tension spring (11), and the strong tension spring (11) is fixedly connected to the mounting plate (5), the end of the strong tension spring (11) away from the mounting plate (5) is fixedly connected to the heat conducting rod (9), the outer wall of the heat conducting rod (9) is fixedly connected to a heat conducting sheet (13), and the end of the heat conducting sheet (13) away from the heat conducting rod (9) is provided with a shell (15).

3. A Roots vacuum pump according to claim 2, characterized in that: One end of the heat conducting rod (9) away from the heat conducting plate (13) is fixedly connected to the limiting block (10).

4. A Roots vacuum pump according to claim 2, characterized in that: The inner wall of the housing (15) is rotatably connected to symmetrically distributed rotating rods (16), the outer wall of the rotating rod (16) is fixedly connected to a rotor (18), and the outer wall of the rotating rod (16) is also fixedly connected to a helical gear (17), and the symmetrical helical gears (17) are meshed and connected.

5. A Roots vacuum pump according to claim 2, characterized in that: The outer wall of the housing (15) is fixedly connected to a connecting frame (19), the outer wall of the connecting frame (19) is fixedly connected to a driving motor (20), and the output end of the driving motor (20) is fixedly connected to the rotating rod (16).

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