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CN-224228857-U - Split type rotor and split Roots pump

CN224228857UCN 224228857 UCN224228857 UCN 224228857UCN-224228857-U

Abstract

The utility model discloses a split rotor and a split Roots pump, which relate to the technical field of vacuum pumps, according to the split rotor and the split Roots pump provided by the utility model, the blade units can be flexibly arranged and assembled with the mandrel, so that the requirements of diversified application scenes are met. The axial limiting device formed by the stepless-adjustable threaded engagement limiting sleeves at the two ends of the mandrel can accurately control the axial positioning precision of the leaf units, avoid the problem of axial movement of the leaf units in the operation process and simplify the assembly positioning process. The separation unit adopts a shaft shoulder or a shaft sleeve with adjustable distance to provide flexible axial positioning for the leaf unit. The circumferential limiting structure thoroughly eliminates free rotation of the leaf unit through the matching structure of the key and the groove, and ensures the geometric precision of synchronous rotation at high rotation speed. When being applied to split type roots pump, split type rotor and a plurality of working chambers one-to-one that set up in the pump body show the gas conveying efficiency under the unit moment of promotion.

Inventors

  • LUO AO
  • WANG YONGFU
  • GAO YA

Assignees

  • 四川莱斯博威智能科技有限公司

Dates

Publication Date
20260512
Application Date
20250624

Claims (10)

  1. 1. A split rotor is characterized by comprising a mandrel and a plurality of leaf units, wherein the leaf units are assembled on the mandrel through trepanning sleeves, separation units are arranged between adjacent leaf units, axial limiting devices capable of limiting axial displacement of the leaf units are respectively arranged at two axial ends of the mandrel, and the leaf units are mutually matched and limited on the mandrel by the paired axial limiting devices.
  2. 2. The split rotor of claim 1, wherein the axial limiting device comprises a limiting sleeve sleeved on the periphery of the mandrel and external threads on the mandrel, the limiting sleeve is provided with a limiting hole, the inner wall of the limiting hole is provided with internal threads, the limiting sleeve can be sleeved on the mandrel through the limiting hole, and the axial position of the limiting sleeve on the mandrel is limited through the engagement of the internal threads and the external threads.
  3. 3. The split rotor of claim 1, wherein each of said vane units has a number of vanes N, N being an integer greater than or equal to 2.
  4. 4. The split rotor of claim 1, wherein the separation unit is a shoulder of a spindle or a sleeve sleeved on the periphery of the spindle.
  5. 5. The split rotor of claim 1, wherein the spindle is provided with a circumferential limit structure that limits circumferential rotation of the vane units.
  6. 6. The split rotor of claim 5, wherein the circumferential spacing structure comprises a first detent provided on a circumferential surface of the spindle, a second detent provided on an inner wall of the shroud of the blade unit, and a detent key mounted between the first detent and the second detent.
  7. 7. A split Roots pump, which is characterized by comprising a pump body, wherein a pair of split rotors according to any one of claims 1-6 are assembled in the pump body, vane units of the pair of split rotors are correspondingly meshed with each other to form a vane pump assembly, a plurality of working cavities are arranged in the pump body, and the working cavities are in one-to-one correspondence with She Bengzu parts.
  8. 8. The split Roots pump as claimed in claim 7, wherein the pump body comprises a first cylinder body and a second cylinder body which can be mutually combined, a plurality of rotating shaft grooves are arranged on the combining surface of the first cylinder body and the second cylinder body along the length direction, the rotating shaft grooves are mutually parallel and spaced, the spacing of the rotating shaft grooves is matched with the size of the vane unit, a working groove is arranged between the rotating shaft grooves on the same axis along the length direction of the pump body, the rotating shaft grooves on the first cylinder body are corresponding to the rotating shaft grooves on the second cylinder body, the working grooves on the first cylinder body are respectively corresponding to the working grooves on the second cylinder body, when the first cylinder body is combined with the second cylinder body, the rotating shaft grooves on the first cylinder body are mutually matched with the rotating shaft grooves on the second cylinder body to form a rotating shaft assembly cavity which can be matched with the spindle, and the working grooves on the first cylinder body are mutually matched with the working grooves on the corresponding second cylinder body to form a working cavity which can be matched with the vane unit.
  9. 9. The split Roots pump as claimed in claim 7, wherein the maximum radial dimension of the outer circumferential profile of the vane units with respect to the spindle is defined as a rotational dimension, the rotational dimension of one vane unit in the direction of gas flow being equal to or greater than the rotational dimension of the next vane unit, the number of vanes of the previous vane unit being equal to or less than the number of vanes of the next vane unit.
  10. 10. The split Roots pump as claimed in claim 9, wherein the thickness of the vane units decreases in the direction of the gas flow with the same number of vanes.

Description

Split type rotor and split Roots pump Technical Field The utility model relates to the technical field of vacuum pumps, in particular to a split rotor and a split Roots pump. Background In existing Roots pump technology, the rotor is typically of unitary construction. The impeller blade number of the integral rotor is usually fixed and single, the flexibility is lacking, the adjustment and the combination are difficult to carry out according to the requirements of different working conditions and application scenes, and the application range of the pump is limited. Custom machining is required and is costly if a multiple impeller configuration or a specific dimensional gradient is required. Therefore, there is a need for a novel Roots pump that can achieve flexible configuration of impellers, ensure reliability of synchronous operation of multiple impellers, and simplify manufacturing and maintenance processes of the pump body. Disclosure of utility model The utility model aims to solve the problems that the number of impeller blades of an integral rotor is generally fixed and single, the flexibility is lacking, the adjustment and the combination are difficult according to the requirements of different working conditions and application scenes, and the application range of the pump is limited by the split type structural design and the pump body structure. The technical scheme adopted by the utility model is as follows: The split rotor and the split Roots pump comprise a mandrel and a plurality of vane units, wherein the vane units are assembled on the mandrel through trepanning sleeves, separation units are arranged between adjacent vane units, axial limiting devices capable of limiting axial displacement of the vane units are respectively arranged at two axial ends of the mandrel, and the vane units are mutually matched and limited by the paired axial limiting devices. By adopting the technical scheme, the leaf units can be flexibly arranged and assembled with the mandrel to meet the requirements of diversified application scenes, and the axial positioning precision of the leaf units can be accurately controlled by the cooperation of the double-end axial limiting device and the separation units, so that the problem of axial movement of the leaf units in the operation process is avoided, and meanwhile, the initial positions of the leaf units can be conveniently and rapidly positioned during assembly. Further, the axial limiting device comprises a limiting sleeve sleeved on the periphery of the mandrel and an external thread on the mandrel, the limiting sleeve is provided with a limiting hole, the inner wall of the limiting hole is provided with an internal thread, the limiting sleeve is sleeved on the mandrel through the limiting hole, and the axial position of the limiting sleeve on the mandrel is limited through the engagement of the internal thread and the external thread. By adopting the technical scheme, the stepless regulation of the axial limiting device can be realized by the threaded engaged limiting sleeve, the problem of difficult assembly caused by machining errors of the traditional fixed limiting structure is solved, and the positioning of the axial position can be finished by rotating and adjusting the limiting sleeve, so that the assembly is convenient. Further, the number of leaves of each leaf unit is N, and N is an integer greater than or equal to 2. Due to the adoption of the technical scheme, the leaf number of the leaf units can be set according to requirements, and the leaf units can be assembled at will, so that the requirements of more use scenes can be met. Further, the separation unit is a shaft shoulder of the mandrel or a shaft sleeve sleeved on the periphery of the mandrel. Due to the adoption of the technical scheme, the axial positioning of the leaf units on the mandrel can be realized through the shaft shoulder and the shaft sleeve, the distance between adjacent leaf units can be adjusted according to the requirement when the shaft sleeve is used as the separation unit, and the adjustability of the separation distance is realized. Further, the mandrel is provided with a circumferential limiting structure capable of limiting circumferential rotation of the leaf unit. Due to the adoption of the technical scheme, the free rotation possibility of the leaf units on the mandrel can be thoroughly eliminated through the circumferential limiting structure, and the geometric precision requirement of synchronous rotation of the leaf units during working is ensured. Further, the circumferential limiting structure comprises a first positioning groove arranged on the circumferential surface of the mandrel, a second positioning groove arranged on the inner wall of the sleeve hole of the leaf unit, and a positioning key assembled between the first positioning groove and the second positioning groove. Due to the adoption of the technical scheme, the matching tightness of the positioning key