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US-12618407-B1 - Connecting ring of a root vacuum pump

US12618407B1US 12618407 B1US12618407 B1US 12618407B1US-12618407-B1

Abstract

A connecting ring of a root vacuum pump is provided. The connecting ring is installed in at least one end portion of a casing of a root vacuum pump for enlarging an effective volume of the casing. The connecting ring includes a frame having a hollow circular structure and being match to a shape of an end portion of the casing; a front end of the frame being formed with a front flange; a front end surface of the front flange and a rear end thereof being formed with a rear flange; and wherein an outer side of the frame is formed with a plurality of enhancing ribs which are formed between the end surfaces of the front flange and the rear flange; and a plurality of trenches are formed between the front flange, the rear flange and each enhance rib.

Inventors

  • Raymond Zhou Shaw

Assignees

  • ELIVAC CO., LTD.
  • China Link Consultant Company, Ltd
  • ELIVAC INC.

Dates

Publication Date
20260505
Application Date
20250605

Claims (10)

  1. 1 . A connecting ring of a root vacuum pump, the connecting ring being installed in at least one end portion of a casing of a root vacuum pump for enlarging an effective volume of the casing, the connecting ring comprising: a frame having a hollow circular structure and being match to a shape of an end portion of the casing; a front end of the frame being formed with a front flange; a front end surface of the front flange and a rear end thereof being formed with a rear flange; and wherein an outer side of the frame is formed with a plurality of enhancing ribs which are formed between the end surfaces of the front flange and the rear flange; and a plurality of trenches are formed between the front flange, the rear flange and each enhance rib.
  2. 2 . The connecting ring of a root vacuum pump as claimed in claim 1 , wherein a front end surface of the front flange is formed with a plurality of screw holes for combining the casing of the root vacuum pump.
  3. 3 . The connecting ring of a root vacuum pump as claimed in claim 2 , wherein an end surface of the rear flange is formed with a first O shape recess which is formed at the surface having the screw holes for installing a first O ring, in assembly, the end surface having the O shape recess is combined with an end cover for forming a tight sealing structure.
  4. 4 . The connecting ring of a root vacuum pump as claimed in claim 3 , wherein in assembly, the rear flange is combined with the end cover; the plurality of screws pass through thread holes in the end cover, the rear flange, and the front flange to the screw holes in the casing of the root vacuum pump; the connecting ring and the root vacuum pump are combined.
  5. 5 . The connecting ring of a root vacuum pump as claimed in claim 1 , wherein a bottom of the frame has a cooling chamber; a bottom of the cooling chamber is covered with a sealing plate, and thus, a complete sealing chamber for water cooling is achieved; and one front end surface and one rear end surface of the cooling chamber are flushed with two end surfaces of the rear flange; and a left end surface and a right end surface of the cooling chamber are arranged across the front end surface and rear end surface of the cooling chamber.
  6. 6 . The connecting ring of a root vacuum pump as claimed in claim 5 , wherein a bottom surface of the cooling chamber is formed with a second O shape recess for installing a second O ring, wherein the front end surface and rear end surface of the cooling chamber are formed with a cooling water outlets and a cooling water inlet, respectively.
  7. 7 . The connecting ring of a root vacuum pump as claimed in claim 1 , wherein an inner wall of the frame is formed with an upper sloped flow guide surface and a lower slopped flow guide surface.
  8. 8 . The connecting ring of a root vacuum pump as claimed in claim 7 , wherein a tilt angle of the upper sloped flow guide surface with respect to the inner wall and a tilt angle of the lower slopped flow guide surface with respect to the inner wall are 17.3°.
  9. 9 . The connecting ring of a root vacuum pump as claimed in claim 1 , wherein a top side of the frame is formed with at least one hanging screw hole for hanging the connecting ring.
  10. 10 . The connecting ring of a root vacuum pump as claimed in claim 1 , wherein a bottom of the frame is installed with at least one pump leg.

Description

FIELD OF THE INVENTION The present invention relates to root vacuum pumps, and in particular to a connecting ring of a root vacuum pump. BACKGROUND OF THE INVENTION Root vacuum pumps are vacuum pumps without internal compression and are volume changed in rotation of the rotors. In the pump, a pair of rotors rotates synchronously along opposite directions without using oil sealing and lubrication is performed. Root vacuum pumps have the advantages of quick pumping speed, affectivity of volume usage, high vacuum, lower power consumption, compact structure, steadiness in operation with high reliability, etc. Therefore, root vacuum pumps are widely used in many fields, such as power, semiconductor, solar energy, oils and foods industrials, medicals, etc. Due to different usages for root vacuum pumps, most of the root vacuum pumps are designed by cases, instead of by specifications. However, this will induce great labor and material necessity. Pump bodies are based components of vacuum pumps. Pump bodies are manufactured integrally. The larger the volumes of the pump bodies, the difficulty the manufacturing works. Cost is the key concern for the market. For reducing the cost for manufacturing of the root vacuum pump, the inventor of the present invention provides a connecting ring which can be connected to the pump body of a root vacuum pump for prolonging a length of the root vacuum pump so that the manufactures only need to design a specific pump body which can be connected with different sizes of connecting rings so as to form various different pump bodies with different sizes. As a result, the cost for manufacturing of root vacuum pumps is reduced greatly. SUMMARY OF THE INVENTION Accordingly, the object of the present invention is to provide a connecting ring of a root vacuum pump, wherein advantages of the present invention are that the connecting ring expands the volume of the root vacuum pump. By the assembly of the root vacuum pump with the connecting ring, it is formed with a novel root vacuum pump with various pumping size and vacuum ability for adapting the requirement of different specifications in the market. As a result, the root vacuum pumps can be produced by modules. This is beneficial for buying of the parts, installing the structure, quality control, and reduction of cost, etc. To achieve above object, the present invention provides a connecting ring of a root vacuum pump, the connecting ring being installed in at least one end portion of a casing of a root vacuum pump for enlarging an effective volume of the casing, the connecting ring comprising: a frame having a hollow circular structure and being match to a shape of an end portion of the casing; a front end of the frame being formed with a front flange; a front end surface of the front flange and a rear end thereof being formed with a rear flange; and wherein an outer side of the frame is formed with a plurality of enhancing ribs which are formed between the end surfaces of the front flange and the rear flange; and a plurality of trenches are formed between the front flange, the rear flange and each enhance rib. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of the connecting ring of the present invention. FIG. 2 is a rear view of the connecting ring of the present invention. FIG. 3 is a perspective view showing the connection between the connecting ring and a root vacuum pump according to the present invention. FIG. 4 is a schematic view showing the connection between the connecting ring and the first O ring according to the present invention. FIG. 5 is a schematic view showing the connection between the connecting ring and the end cover according to the present invention. FIG. 6 shows an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. Referring to FIGS. 1 to 6, the connecting ring for a root vacuum pump according to the present invention is illustrated. In assembly, the connecting ring 100 is installed in one end portion of a casing 2 of a root vacuum pump 1. The connecting ring 100 serves to expand an effective volume of the root vacuum pump 1. One end portion of the casing 2 of the root vacuum pump 1 is connected to the connecting ring 100. However, each of two end portions of the root vacuum pump 1 can be connected with a respective connecting ring 100. A length of the connecting ring 100 is designed as desired, a preferred one is 140 nm. Referring to FIG. 1, the connecting ring 100 includes following elements. A frame 101 has a hollow round structure and is match to