Connecting ring of roots vacuum pump

Abstract

A connecting ring of a roots vacuum pump relates to the technical field of roots vacuum pumps and is mounted at least one end of a shell of the roots vacuum pump. The connecting ring is used for expanding the effective volume space of the shell; the connecting ring comprises a frame body which is of a hollow annular structure, and the shape of the frame body is matched with the shape of the end portion of the shell. A front end flange is formed at the front end of the frame body; a rear end flange is formed at the rear end of the frame body; a plurality of reinforcing ribs are formed on the outer edge of the frame body and located between the two end faces of the front end flange and the two end faces of the rear end flange. And a plurality of grooves are formed among the reinforcing ribs. And the cooling water cavity is positioned at the bottom of the frame body. According to the utility model, the volume of the Roots vacuum pump is expanded, and the Roots vacuum pump and the adapter ring can be combined and matched in different ways on the same platform.

Description

TECHNICAL FIELD

[0001] The utility model relates to a roots vacuum pump, especially a joint ring of a roots vacuum pump. BACKGROUND

[0002] The roots vacuum pump is a kind of rotary variable displacement vacuum pump without internal compression, which realizes vacuumizing by moving gas with a pair of rotors in the pump cavity synchronously and reversely rotating, and relies on gap sealing between rotors and between rotors and pump shell without oil sealing and lubrication.The roots vacuum pump has the characteristics of large pumping speed, high volumetric efficiency, high vacuum degree, small energy consumption, compact structure, stable and reliable operation, etc., and has been widely applied in the industries of electric power, semiconductor, photovoltaic, petroleum chemical industry, food processing and smelting.

[0003] Due to different requirements of customers for the roots vacuum pump, such as different gas pumping capacity, limit vacuum and installation mode, most of the roots vacuum pumps are designed and manufactured as non-standard customization.Although non-standard customization can better meet the needs of customers, it needs to consume more manpower and material resources for the roots vacuum pump designer and manufacturer.

[0004] The pump body is a basic component of the roots vacuum pump.The pump body is an integrated casting, and the larger the pump body is, the more difficult the casting processing is.From the performance, manufacturing and cost, the cost performance of large pump body is not the highest.Under the condition of meeting the same function and quality, cost is the core element for the designer and manufacturer to win market competition.

[0005] Non-standard customization better meets the needs of customers and the designer and manufacturer usually provides high-quality and low-cost products, which are usually contradictory, and integrated modular production can better solve this contradiction.Integrated modular production can increase the flexibility and convenience of production for the designer and manufacturer, shorten product development time, improve production efficiency and reduce production cost.

[0006] In production, more integrated modular production methods need to be explored to meet the needs of customers with low price and high performance. UTILITY MODEL CONTENT

[0007] The utility model aims at solving the above-mentioned problems in the prior art, and provides a joint ring of a roots vacuum pump, i.e., a long pump body is designed into a short pump body plus a joint ring, the length of the pump body is shortened, the casting processing of the pump body is easier, and the combination of the pump body and the joint ring is an integrated modular production method.The design and use of the joint ring can avoid the series problems caused by the oversize pump body, and the free combination of the joint ring and the pump body enables the designer and manufacturer to quickly and efficiently meet more needs of customers with high quality and low price on the basis of existing production capacity.Therefore, the utility model hopes to provide a new joint ring of a roots vacuum pump to solve the defects in the prior art.

[0008] To achieve the above-mentioned purposes, the utility model discloses a joint ring of Roots vacuum pump, wherein the joint ring is installed on at least one end of the shell of a Roots vacuum pump; the joint ring is used for expanding the effective volume space of the shell; the joint ring comprises: a frame, which is a hollow annular structure, and the shape of the frame is adapted to the shape of the end of the shell; the front end of the frame forms a front flange; the rear end of the frame forms a rear flange; the outer edge of the frame forms a plurality of reinforcing ribs between the front flange and the rear flange; a plurality of grooves are formed between the reinforcing ribs.

[0009] Further, a plurality of bolt holes are formed on the end face of the front flange for the joint of the front flange and the shell of the Roots vacuum pump; a plurality of bolt holes are formed on the end face of the rear flange.

[0010] Further, a first O-shaped sealing ring groove is formed on the same end face of the bolt hole of the rear flange, and a first O-shaped sealing ring is installed in the first O-shaped sealing ring groove; one end of the O-shaped sealing ring groove is connected with an end cover to form a sealing structure.

[0011] Further, a cooling water cavity is further arranged at the bottom of the frame; after a sealing plate is arranged on the bottom of the cooling water cavity, a closed cooling water sealing cavity is formed.

[0012] The front end face and the rear end face of the cooling water cavity are flush with the two end faces of the front flange and the rear flange; the left and right end faces of the cooling water cavity are connected between the front end face and the rear end face of the cooling water cavity.

[0013] Further, a second O-shaped sealing ring groove is formed on the bottom face of the cooling water cavity, and a second O-shaped sealing ring is installed in the second O-shaped sealing ring groove; a cooling water outlet and a cooling water inlet are respectively formed on the front end face and the rear end face of the cooling water cavity.

[0014] Further, a top slope flow guide face and a bottom slope flow guide face are respectively formed on the inner wall face of the frame.

[0015] Further, the inclination angle of the top slope flow guide face and the bottom slope flow guide face relative to the inner wall face is 17.3°.

[0016] Further, when assembled, the rear flange is connected with the end cover; a plurality of bolts are sequentially arranged through the bolt holes of the end cover, the rear flange of the joint ring, the front flange of the joint ring, and connected with a plurality of threaded holes on the shell of the Roots vacuum pump, so that the end cover, the joint ring and the pump body of the Roots vacuum pump are connected to form an integrated body.

[0017] Further, the frame top forms at least one lifting threaded hole for lifting the connecting ring.

[0018] Further, at least one pump foot is installed at the frame bottom, and the frame is connected with the pump foot through screws.

[0019] The connecting ring expands the volume of the Roots vacuum pump, and different combinations of the Roots vacuum pump and the connecting ring can derive products with different air extraction amounts and different vacuum degrees on the same platform, so as to adapt to the demand for different specifications of products on the market and realize integrated and modular production of the products.

[0020] The features and advantages of the present application can be further understood from the following description, and the drawings should be referred to. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A front view of the connecting ring of the present application is shown;

[0022] Figure 2 A rear view of the connecting ring of the present application is shown;

[0023] Figure 3 A connection diagram of the connecting ring of the present application and the Roots vacuum pump is shown;

[0024] Figure 4 A connection diagram of the connecting ring of the present application and the first O-shaped sealing ring is shown;

[0025] Figure 5 A connection diagram of the connecting ring of the present application and the end cover is shown;

[0026] Figure 6 An embodiment of the present application is shown.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 100, connecting ring; 101, frame; 102, pump foot; 103, inner wall surface; 11, lifting threaded hole; 1, Roots vacuum pump; 2, shell; 21, end cover; 3, front flange; 4, rear flange; 5, first O-shaped sealing ring groove; 51, first O-shaped sealing ring; 200, end cover; 6, cooling water cavity; 61, front end surface; 62, rear end surface; 7, second O-shaped sealing ring groove; 71, second O-shaped sealing ring groove; 81, cooling water outlet; 82, cooling water outlet; 9, inclined slope flow guide surface; 10, bottom inclined slope flow guide surface. DETAILED DESCRIPTION

[0029] The utility model discloses a structure composition and the advantages of the utility model, and the preferred embodiment of the utility model is explained in detail as follows with the cooperation of the drawings.

[0030] Please refer to Figures 1 to 6 The utility model discloses a ring for a Roots vacuum pump, as shown in Figure 6 The ring 100 is used to expand the effective volume space of the shell 2. One of the ends of the shell 2 can be connected with the ring 100, or one of the rings 100 can be connected to each end of the shell 2. The length of the ring 100 is made into a series of products, and preferably the length of the ring 100 is 140 mm.

[0031] As shown in Figure 1 The ring 100 comprises:

[0032] A frame body 101, which is a hollow annular structure, is adapted to the shape of the end of the shell 2.

[0033] The front end of the frame body 101 forms a front flange 3; the end face of the front flange 3 is provided with a plurality of bolt holes 31, and the front flange 3 is connected to the shell 2 of the Roots vacuum pump 1 as shown in Figure 3 The inner diameter of the frame body 101 is equal to the inner diameter of the shell 2, and preferably the inner diameter R of the frame body 101 is 220 mm.

[0034] The rear end of the frame body 101 forms a rear flange 4; the end face of the rear flange 4 is provided with a plurality of bolt holes 41. As shown in Figure 4 A first O-ring groove 5 is formed on the same end face of the bolt holes 41 of the rear flange 4, which is used to install a first O-ring 51. As shown in Figure 5 And Figure 6 One end of the O-ring groove 5 is connected to an end cover 200 to form a sealing structure.

[0035] The outer edge of the frame body 101 is provided with a plurality of reinforcing ribs 21, which are located between the two end faces of the front flange 3 and the rear flange 4. Each reinforcing rib 21 is parallel to the axis of the frame body 101. Preferably, the width of the reinforcing rib 21 is 30 mm. A plurality of grooves 2 are formed between the front flange 3, the rear flange 4 and each reinforcing rib 21. Preferably, the depth of the groove 2 is 48 mm.

[0036] The grooves 2 are used to reduce the weight of the ring 100, and the reinforcing ribs 21 are used to strengthen the ring 100, and increase the natural radiation heat dissipation area or the ability of convective air cooling of the ring 100.

[0037] A cooling water cavity 6 is located at the bottom of the frame 101, and a front end face 61 and a rear end face 62 of the cooling water cavity 6 are flush with the end faces of the front flange 3 and the rear flange 4; and the left and right end faces of the cooling water cavity 6 span between the front end face 61 and the rear end face 62 of the cooling water cavity 6.

[0038] A bottom face of the cooling water cavity 6 forms a second O-ring groove 7 for installing an O-ring 71. A cooling water outlet 82 and a cooling water inlet 81 are respectively formed on the front end face 61 and the rear end face 62 of the cooling water cavity 6. In use, the cooling water inlet 81 is used to introduce circulating cooling water into the cooling water cavity 6, so as to forcibly cool the gasket 100, which helps to reduce the temperature of the Roots vacuum pump 1. After a cover plate 64 is covered on the bottom of the cooling water cavity 6, a closed cooling water cavity is formed.

[0039] A top slope flow guide face 9 and a bottom slope flow guide face 10 are formed on the inner wall face 103 of the frame 101. Preferably, the inclination angles of the top slope flow guide face 9 and the bottom slope flow guide face 10 relative to the inner wall face 103 are 17.3°.

[0040] Two pump body slope flow guide faces corresponding to the two sides of an air inlet and an air outlet of the inner cavity of the Roots vacuum pump 1 are respectively arranged along the direction of the blade shaft, and the two pump body slope flow guide faces are integrated with the corresponding top slope flow guide face 9 and the bottom slope flow guide face 10. The top slope flow guide face 9 makes the gas of the air inlet of the Roots vacuum pump 1 flow along the direction of the blade shaft of the pump body to the two ends of the blade; the bottom slope flow guide face 10 makes the gas in the cavity of the Roots vacuum pump 1 flow along the direction of the blade shaft to the air outlet of the Roots vacuum pump 1. Moreover, the condensed liquid formed in production flows out of the air outlet along the bottom slope flow guide face 10, and does not remain and accumulate in the Roots vacuum pump 1.

[0041] In assembly, the rear flange 4 is engaged with the end cover 200. As shown in Figure 5 , a plurality of M16 long bolts (not shown in the figure) are sequentially passed through the end cover 200, the rear flange 4 of the gasket, the ø18 bolt holes on the front flange 3 of the gasket, and connected with the plurality of M16 threaded holes on the shell 2 of the Roots vacuum pump 1, so as to connect the end cover 200, the gasket 100 and the pump body Roots vacuum pump 1 together to form an integrated body. When the gasket 100 is not used, the end cover 200 is directly connected with the shell 2 of the Roots vacuum pump 1 by the plurality of M16 bolts.

[0042] The interface ring 100 and the shell 2, and the interface ring 100 and the end cover 200 are positioned by two ø16 cylindrical pins. When the interface ring 100 is not used, the shell 2 and the end cover 200 are positioned by two ø16 cylindrical pins. The shell 2 and the interface ring 100, the interface ring 100 and the end cover 200, and the Roots vacuum pump 1 and the end cover 200 are positioned by ø16 cylindrical pins and ø16 pin holes in sliding fit, effectively ensuring the coaxiality and orientation accuracy of the connection.

[0043] The frame body 101 is provided with at least one lifting threaded hole 11 at the top for lifting the interface ring 100, facilitating the disassembly and assembly of the interface ring 100. Preferably, the lifting threaded hole 11 is an M20 threaded hole, which can be used to install an M20 lifting ring screw (not shown).

[0044] During assembly, a pair of impeller rotors are installed in the cavity formed by the Roots vacuum pump 1 or the combination of the Roots vacuum pump 1 and the interface ring 100, and the end covers 200 at both ends, to complete the vacuum pumping work together. The end cover 200 is provided with an impeller support bearing.

[0045] The frame body 101 is provided with at least one pump foot 102 at the bottom, i.e., at least one M16 threaded hole is formed at the bottom of the frame body 101, and the frame body 101 and the pump foot 102 are connected by an M16 screw. The installation of the pump foot 102 at the bottom of the frame body 101 can expand the installation form of the Roots vacuum pump 1, meet the needs of different installation positions, improve the flexibility and convenience of installation, and make the product compact and beautiful.

[0046] An O-ring is used to seal between the end face of the shell 2 of the Roots vacuum pump 1 and the interface ring 100, and an O-ring groove is formed in the end face of the Roots vacuum pump 1 (not shown). When the interface ring 100 is not used, i.e., the end cover 200 is directly connected to the Roots vacuum pump 1, the O-ring is used to seal between the Roots vacuum pump 1 and the end cover 200. The O-ring sealing method has good sealing effect and is convenient to disassemble and assemble.

[0047] The interface ring expands the volume of the Roots vacuum pump, and different combinations of the Roots vacuum pump and the interface ring can derive products with different pumping capacities and different vacuum degrees on the same platform, to meet the needs of different specifications of products on the market, and realize integrated and modular production of products. Integrated and modular production of products can make enterprises more efficient in lean production and improve product quality in terms of parts procurement, manufacturing and installation, quality control, and cost reduction.

[0048] In summary, the humanized and considerate design of the utility model is quite in line with the actual demand.

[0049] The above detailed description is for a specific description of a feasible embodiment of the utility model, but the embodiment is not used to limit the patent range of the utility model, and equivalent implementation or changes without departing from the spirit of the utility model art should be included in the patent range of the utility model.

Claims

1. A ring of a Roots vacuum pump, characterized in that The adapter ring (100) is mounted on at least one end of a housing (2) of a Roots vacuum pump (1), and the adapter ring (100) comprises: a frame body (101) which is a hollow annular structure and is adapted to the shape of the end of the housing (2); the front end of the frame body (101) forms a front flange (3); the rear end of the frame body (101) forms a rear flange (4); the outer frame edge of the frame body (101) forms a plurality of reinforcing ribs (21) between the front flange (3) and the rear flange (4); the front flange (3), the rear flange (4), and each reinforcing rib (21) form a plurality of grooves (2).

2. The rotor vacuum pump's faceplate according to claim 1, characterized in that The end face of the front flange (3) forms a plurality of bolt holes (31) for the engagement of the front flange (3) and the housing (2) of the Roots vacuum pump (1); the end face of the rear flange (4) forms a plurality of bolt holes (41).

3. The rotor vacuum pump's faceplate according to claim 2, characterized in that A first O-ring groove (5) is formed on the same end face of the bolt holes (41) of the rear flange (4), and a first O-ring (51) is mounted in the first O-ring groove (5); one end of the O-ring groove (5) is engaged with an end cover (200) to form a sealed structure.

4. The rotor vacuum pump's faceplate of claim 1, wherein, A cooling water cavity (6) is further included at the bottom of the frame body (101); wherein after a sealing plate (64) is mounted on the bottom of the cooling water cavity (6), a closed cooling water cavity is formed. The front end face (61) and the rear end face (62) of the cooling water cavity (6) are flush with the end faces of the front flange (3) and the rear flange (4); the left and right end faces of the cooling water cavity (6) span between the front end face (61) and the rear end face (62) of the cooling water cavity (6).

5. The rotor vacuum pump's faceplate of claim 4, characterized in that, The bottom face of the cooling water cavity (6) forms a second O-ring groove (7), and a second O-ring (71) is mounted in the second O-ring groove (7); wherein the front end face (61) and the rear end face (62) of the cooling water cavity (6) respectively form a cooling water outlet (82) and a cooling water inlet (81).

6. The ring of claim 1, wherein The inner wall face (103) of the frame body (101) respectively forms a top inclined slope flow guide face (9) and a bottom inclined slope flow guide face (10).

7. A rotor vacuum pump's faceplate according to claim 6, characterized in that The inclination angle of the top inclined slope flow guide face (9) and the bottom inclined slope flow guide face (10) relative to the inner wall face (103) is 17.3°.

8. The rotor vacuum pump's faceplate of claim 3, wherein, During assembly, the rear flange (4) is engaged with the end cover (200); wherein a plurality of bolts are sequentially passed through the bolt holes of the end cover (200), the adapter ring rear flange (4), and the adapter ring front flange (3), and are connected with the threaded holes on the housing (2) of the Roots vacuum pump (1), thereby connecting the end cover (200), the adapter ring (100), and the pump body Roots vacuum pump (1) to form an integrated body.

9. The rotor vacuum pump's faceplate of claim 1, wherein, The top of the frame body (101) forms at least one lifting threaded hole (11) for lifting the adapter ring (100).

10. The rotor vacuum pump's faceplate of claim 1, wherein, At least one pump foot (102) is installed at the bottom of the frame (101), and the frame (101) is connected with the pump foot (102) through a screw.

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