End face exhaust energy-saving dry-type roots pump

Abstract

The invention discloses an end face exhaust energy-saving dry type roots pump which comprises a pump body, a rotor assembly is arranged in the pump body, the pump body comprises a pump body main body, an air inlet is formed in the middle of the top end of the pump body main body, and a wind speed gathering wind shield is formed in the position, below the rotor assembly, of the pump body main body. An air outlet is formed in the end, located at the air speed gathering wind shield, of the pump body main body, a flow guide plate is arranged at the position, located above the air outlet, of the pump body main body, the flow guide plate extends to the air speed gathering wind shield, and a flow guide groove is formed between the flow guide plate and the air speed gathering wind shield. According to the invention, gaps between the wind speed gathering wind shields and the roots blades also play a role in temporarily storing gas, then under the action of rotation of the roots blades and the wind speed gathering wind shields, airflow flows towards the gas outlet along the wind speed gathering wind shields, and in the process, the flow guide grooves play a role in stabilizing flow and reducing gas backflow, so that the gas backflow is reduced; the airflow flowing stability is improved, and noise is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of dry Roots pumps, and particularly to an end-face exhaust energy-saving dry Roots pump. Background Art

[0002] A dry screw vacuum pump is an oil-free and pollution-free vacuum pump, which is widely used in industries such as semiconductors, industry, and medicine, and can be used alone or in combination with a Roots pump, etc. When used alone, the dry screw vacuum pump generally has a relatively small pumping speed and a not-high ultimate vacuum degree. When a Roots-screw vacuum unit composed of a series combination of a screw vacuum pump and a Roots pump is used, a larger pumping speed and a higher ultimate vacuum degree can be obtained.

[0003] Most of the upper and lower exhaust ends of the existing Roots pumps on the market adopt the method of aligning the upper and lower ports (such as a countercurrent cooling dry Roots vacuum pump disclosed in the publication number CN104265636A). This causes the gas discharged during the operation of the Roots pump to flow back, resulting in a decrease in exhaust efficiency and an increase in energy consumption. Moreover, during the exhaust process, the gas flow path is not restricted, which will not only affect the stability of gas flow and thus generate noise. In addition, in order to ensure the pumping efficiency, the air inlet is placed in the middle of the pump body. Since the air outlet is aligned with the air inlet, the air outlet is also placed in the center of the pump body, which also affects the placement of the water-cooling plate. If the water-cooling plate is only placed at one end, the other end cannot be cooled, and if water-cooling plates are placed at both ends, it will lead to an increase in components, increasing the design, assembly, and maintenance costs. Summary of the Invention

[0004] The purpose of the present invention is to provide an end-face exhaust energy-saving dry Roots pump to solve the problems in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: An end-face exhaust energy-saving dry roots pump, comprising a pump body, a rotor assembly is arranged inside the pump body, the pump body includes a pump body main body, an air inlet is arranged at the middle position of the top end of the pump body main body, a wind speed gathering wind deflector is formed below the rotor assembly in the pump body main body, an air outlet is arranged at one end of the pump body main body where the wind speed gathering wind deflector is located, a guide plate is arranged above the air outlet in the pump body main body, the guide plate extends to the wind speed gathering wind deflector, and a guide groove is formed between the guide plate and the wind speed gathering wind deflector; Gas is added into the pump body from the air inlet. The pump body is equipped with a driving roots rotor and a driven roots rotor that cooperate with each other. Each rotor has two roots blades. The blades and the inner wall of the pump body enclose the gas between the roots blades and the pump body. Subsequently, the blades rotate to transport the gas from the air inlet to the wind speed gathering wind deflector. At this time, the gap between the wind speed gathering wind deflector and the roots blades also plays a role in temporarily storing the gas. Subsequently, under the action of the rotation of the roots blades and the wind speed gathering wind deflector, the air flow flows along the wind speed gathering wind deflector towards the air outlet. During this process, the guide groove plays a role in stabilizing the flow, reducing the gas backflow, increasing the stability of the air flow, and reducing the noise.

[0006] Preferably, the guide plate is provided with an inclined structure at the position of the wind speed gathering wind deflector, and the inclined structure is inclined upward. The inclined structure facilitates the temporarily stored gas to enter the guide groove.

[0007] Preferably, the wind speed gathering wind deflector is provided with an arc-shaped chamfer structure at the position of the inclined structure, and the corners of the pump body at the air outlet are all provided with arc-shaped chamfer structures. The arc-shaped chamfer structure makes the gas flow more smoothly.

[0008] Preferably, a water-cooling plate is installed at the bottom end of the pump body main body, and the water-cooling plate and the pump body main body are of an integral structure. Since the air outlet is arranged at one end of the bottom of the pump body, the water-cooling plate is installed in the center of the pump body to cool the pump body, which can effectively improve the cooling efficiency and reduce the cavity temperature.

[0009] Preferably, a plurality of heat dissipation fins are arranged at equal intervals on the outer side of the pump body main body, and the heat dissipation fins and the pump body main body are of an integral structure.

[0010] Preferably, the rotor assembly includes a driving rotating shaft, a driving roots rotor, a driving gear, a driven rotating shaft, a driven roots rotor and a driven gear. The driving rotating shaft and the driven rotating shaft are arranged in parallel. The driving rotating shaft and the driven rotating shaft are respectively installed with a driving roots rotor and a driven roots rotor. The driving roots rotor and the driven roots rotor rotate synchronously and in opposite directions. The driving rotating shaft is installed with driving gears at both ends of the driving roots rotor, and the driven rotating shaft is installed with driven gears meshing with the driving gears at both ends of the driven roots rotor.

[0011] Preferably, the structures of the active Roots rotor and the driven Roots rotor are the same. The active Roots rotor and the driven Roots rotor both include a rotor body. A shaft hole for the shaft to pass through is formed in the middle of the rotor body. Through holes are arranged on both sides of the rotor body where the shaft hole is located. Second arc structures are symmetrically arranged at both ends of the rotor body. First arc structures are symmetrically arranged on both sides of the rotor body. First arc-shaped structures are arranged at both ends of the rotor body where the first arc structure is located. A second arc structure is arranged between the first arc-shaped structure and the second arc structure;

[0012] When the active Roots rotor and the driven Roots rotor rotate, the first arc structure of the active Roots rotor contacts the second arc structure of the active Roots rotor, the second arc structure of the active Roots rotor contacts the first arc structure of the active Roots rotor, the first arc-shaped structure of the active Roots rotor contacts the second arc-shaped structure of the active Roots rotor, and the second arc-shaped structure of the active Roots rotor contacts the first arc-shaped structure of the active Roots rotor;

[0013] The distance between the two shaft holes is L, the radius of the first arc structure is R1, the radius of the second arc structure is R2, and L = R1 + R2.

[0014] Preferably, a first end plate and a second end plate are respectively installed at both ends of the pump body. A first gear box is installed on one side of the first end plate, and a second gear box is installed on one side of the second end plate. The first gear box and the second gear box are used to accommodate the driving gear and the driven gear. Oil injection holes are arranged at the tops of the first gear box and the second gear box; A driving component for driving the driving shaft is installed at one end of the first gear box; A first cooling pipeline is arranged in the first gear box, and a second cooling pipeline is arranged in the second gear box. The first cooling pipeline and the second cooling pipeline are arched pipelines. The first cooling pipeline and the second cooling pipeline are connected through a pipeline. The first cooling pipeline is provided with a water inlet, and the second cooling pipeline is provided with a water outlet. The gear boxes are well cooled and dissipated heat through the first cooling pipeline and the second cooling pipeline.

[0015] Preferably, a bracket is detachably installed at the bottom end of the pump body. The first end plate and the second end plate both include an end plate body. Two bearing holes are formed in the end plate body. Reinforcing ribs are arranged outside the bearing holes of the end plate body. The reinforcing ribs improve the strength of the end plate body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The main body of the pump is provided with an air outlet at one end of the wind speed concentrating windshield. A guiding plate is arranged above the air outlet of the pump main body and extends to the wind speed concentrating windshield. A guiding groove is formed between the guiding plate and the wind speed concentrating windshield. Gas is added into the pump body from the air inlet. The pump body is equipped with a mutually cooperating driving Roots rotor and a driven Roots rotor. Each rotor has two Roots blades. The blades and the inner wall of the pump body enclose the gas between the Roots blades and the pump body. Then the blades rotate to convey the gas from the air inlet to the wind speed concentrating windshield. At this time, the gap between the wind speed concentrating windshield and the Roots blades also plays a role in temporarily storing the gas. Subsequently, under the action of the rotation of the Roots blades and the wind speed concentrating windshield, the air flow flows along the wind speed concentrating windshield towards the air outlet. During this process, the guiding groove plays a role in stabilizing the flow, reducing the gas backflow, increasing the stability of the air flow, and reducing the noise.

[0018] 2. The guiding plate is provided with an inclined structure at the wind speed concentrating windshield. The inclined structure is inclined upward, which is convenient for the temporarily stored gas to enter the guiding groove. The wind speed concentrating windshield is provided with a circular arc chamfer structure at the inclined structure. The corners of the pump body at the air outlet are all provided with circular arc chamfer structures. The circular arc chamfer structures make the gas flow more smoothly.

[0019] 3. Since the air outlet is arranged at one end of the bottom of the pump body, the water cooling plate is installed in the center of the pump body to cool the pump body, which can effectively improve the cooling efficiency and reduce the cavity temperature.

[0020] 4. A plurality of heat dissipation fins are arranged at equal intervals on the outer side of the pump main body. The heat dissipation fins and the pump main body are of an integral structure. The heat dissipation fins improve the heat dissipation effect of the pump body. A first cooling pipeline is arranged in the first gearbox, and a second cooling pipeline is arranged in the second gearbox. The first cooling pipeline and the second cooling pipeline are arched pipelines. The first cooling pipeline and the second cooling pipeline are connected by a pipeline. The first cooling pipeline is provided with a water inlet, and the second cooling pipeline is provided with a water outlet. The first cooling pipeline and the second cooling pipeline are used to cool and dissipate heat from the gearbox very well. Description of the Drawings

[0021] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0022] Figure 1 is the structural schematic diagram of the present invention;

[0023] Figure 2 is the structural schematic diagram of the pump body of the present invention without heat dissipation fins;

[0024] Figure 3 is the cross-sectional view of the pump body of the present invention;

[0025] Figure 4 is a schematic structural view of the end plate of the present invention;

[0026] Figure 5 is a schematic structural view of the rotor assembly of the present invention;

[0027] Figure 6 is the present invention Figure 5 schematic structural view from the rear perspective;

[0028] Figure 7 is a schematic structural view of the driving Roots rotor and the driven Roots rotor of the present invention.

[0029] In the figure: 1, driving assembly; 2, first gearbox; 3, first end plate; 4, heat dissipation fins; 5, second end plate; 6, oil injection hole; 7, second gearbox; 8, pump body; 9, water outlet; 10, bracket; 11, water inlet; 12, rotor assembly; 31, end plate main body; 32, bearing hole; 33, reinforcing rib; 81, flow guide plate; 82, pump body main body; 83, air inlet; 84, air outlet; 85, flow guide groove; 86, inclined structure; 87, wind speed gathering wind baffle; 88, water cooling plate; 121, driving rotating shaft; 122, driving Roots rotor; 123, driving gear; 124, driven rotating shaft; 125, driven Roots rotor; 126, driven gear; 1221, rotor main body; 1222, through hole; 1223, first arc structure; 1224, first arc-shaped structure; 1225, second arc-shaped structure; 1226, second arc structure. Specific embodiments

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative effort fall within the scope of protection of the present invention. Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention.

[0031] Please refer to Figure 2-3, in an embodiment of the present invention, a dry Roots pump with end-face exhaust and energy saving includes a pump body 8. A rotor assembly 12 is arranged inside the pump body 8. The pump body 8 includes a pump body main body 82. An air inlet 83 is arranged at the middle position of the top end of the pump body main body 82. A wind speed gathering wind deflector 87 is formed below the rotor assembly 12 in the pump body main body 82. An air outlet 84 is arranged at one end of the pump body main body 82 where the wind speed gathering wind deflector 87 is located. A flow guide plate 81 is arranged above the air outlet 84 of the pump body main body 82. The flow guide plate 81 extends to the wind speed gathering wind deflector 87. A flow guide groove 85 is formed between the flow guide plate 81 and the wind speed gathering wind deflector 87. The flow guide plate 81 is provided with an inclined structure 86 at the position of the wind speed gathering wind deflector 87. The inclined structure 86 is inclined upward. The inclined structure 86 facilitates the gas temporarily stored to enter the flow guide groove 85. The wind speed gathering wind deflector 87 is provided with an arc chamfer structure at the position of the inclined structure 86. The corners of the pump body 8 at the air outlet 84 are all provided with arc chamfer structures. A water-cooling plate 88 is installed at the bottom end of the pump body main body 82. The water-cooling plate 88 and the pump body main body 82 are of an integral structure. The air inlet 83 is connected to an air extraction pipeline. Gas is added into the pump body from the air inlet 83. The pump body is equipped with a driving Roots rotor 122 and a driven Roots rotor 125 that cooperate with each other. Each rotor has two Roots blades. The blades and the inner wall of the pump body enclose the gas between the Roots blades and the pump body. Subsequently, the blades rotate to convey the gas from the air inlet to the wind speed gathering wind deflector 87. At this time, the gap between the wind speed gathering wind deflector 87 and the Roots blades also plays a role in temporarily storing the gas. Subsequently, under the action of the rotation of the Roots blades and the wind speed gathering wind deflector 87, the air flow flows along the wind speed gathering wind deflector 87 towards the air outlet 84. During this process, the flow guide groove 85 plays a role in stabilizing the flow and reducing the gas backflow; the water-cooling plate 88 is installed in the center of the pump body to cool the pump body; a plurality of heat dissipation fins 4 are arranged at equal intervals on the outer side of the pump body main body 82. The heat dissipation fins 4 and the pump body main body 82 are of an integral structure. The heat dissipation fins 4 improve the heat dissipation effect of the pump body.

[0032] As Figure 1 and 4, a first end plate 3 and a second end plate 5 are respectively installed at both ends of the pump body 8. A first gearbox 2 is installed on one side of the first end plate 3, and a second gearbox 7 is installed on one side of the second end plate 5. The first gearbox 2 and the second gearbox 7 are used to accommodate the driving gear 123 and the driven gear 126. Oil injection holes 6 are provided at the tops of the first gearbox 2 and the second gearbox 7, and lubricating oil can be conveniently added to the gears through the oil injection holes 6. A driving assembly 1 for driving the driving main shaft 121 is installed at one end of the first gearbox 2; a first cooling pipeline is arranged in the first gearbox 2, and a second cooling pipeline is arranged in the second gearbox 7. The first cooling pipeline and the second cooling pipeline are arched pipelines, and the first cooling pipeline and the second cooling pipeline are connected by a pipeline. The first cooling pipeline is provided with a water inlet 11, and the second cooling pipeline is provided with a water outlet 9. The first cooling pipeline and the second cooling pipeline can cool and dissipate heat from the gearbox well; a bracket 10 is detachably installed at the bottom end of the pump body 8. The first end plate 3 and the second end plate 5 each include an end plate main body 31. Two bearing holes 32 are formed in the end plate main body 31, and reinforcing ribs 33 are arranged outside the bearing holes 32 of the end plate main body 31. The reinforcing ribs 33 improve the strength of the end plate main body 31.

[0033] As Figure 5 , 6 , 7, the rotor assembly 12 includes a driving main shaft 121, a driving Roots rotor 122, a driving gear 123, a driven main shaft 124, a driven Roots rotor 125 and a driven gear 126. The driving main shaft 121 and the driven main shaft 124 are arranged in parallel. The driving main shaft 121 and the driven main shaft 124 are respectively installed with a driving Roots rotor 122 and a driven Roots rotor 125. The driving Roots rotor 122 and the driven Roots rotor 125 rotate synchronously and in opposite directions. Driving gears 123 are installed at both ends of the driving main shaft 121 where the driving Roots rotor 122 is located. Driven gears 126 meshing with the driving gears 123 are installed at both ends of the driven main shaft 124 where the driven Roots rotor 125 is located. Through the driving gears 123 and the driven gears 126 at both ends, the rotation stability of the main shaft is improved, and thus the rotation stability of the rotor is improved.

[0034] As Figure 5 , 6, 7. The structures of the driving Roots rotor 122 and the driven Roots rotor 125 are the same. Both the driving Roots rotor 122 and the driven Roots rotor 125 include a rotor body 1221. A shaft hole for the shaft to pass through is provided in the middle of the rotor body 1221. Through holes 1222 are provided on both sides of the rotor body 1221 where the shaft hole is located. Second arc structures 1226 are symmetrically arranged at both ends of the rotor body 1221. First arc structures 1223 are symmetrically arranged on both sides of the rotor body 1221. First arc-shaped structures 1224 are arranged at both ends of the rotor body 1221 where the first arc structure 1223 is located. A second arc structure 1226 is arranged between the first arc-shaped structure 1224 and the second arc structure 1226; when the driving Roots rotor 122 and the driven Roots rotor 125 rotate, the first arc structure 1223 of the driving Roots rotor 122 contacts the second arc structure 1226 of the driving Roots rotor 122, the second arc structure 1226 of the driving Roots rotor 122 contacts the first arc structure 1223 of the driving Roots rotor 122, the first arc-shaped structure 1224 of the driving Roots rotor 122 contacts the second arc-shaped structure 1225 of the driving Roots rotor 122, the second arc-shaped structure 1225 of the driving Roots rotor 122 contacts the first arc-shaped structure 1224 of the driving Roots rotor 122. When the driving Roots rotor 122 and the driven Roots rotor 125 rotate, they can be in stable and close contact, thereby realizing good gas transmission; the distance between the two shaft holes is L, the radius of the first arc structure 1223 is R1, the radius of the second arc structure 1226 is R2, and L = R1 + R2, ensuring the close fit of the driving Roots rotor 122 and the driven Roots rotor 125.

[0035] The working principle of the present invention is as follows: The air inlet 83 is connected to the air extraction pipeline, and gas is added into the pump body from the air inlet 83. The pump body is equipped with a driving Roots rotor 122 and a driven Roots rotor 125 that cooperate with each other. Each rotor has two Roots vanes. The vanes and the inner wall of the pump body enclose the gas between the Roots vanes and the pump body. Subsequently, the vanes rotate to transport the gas from the air inlet to the wind speed aggregation windshield 87. At this time, the gap between the wind speed aggregation windshield 87 and the Roots vanes also plays a role in temporarily storing the gas. Subsequently, under the action of the rotation of the Roots vanes and the wind speed aggregation windshield 87, the air flow flows along the wind speed aggregation windshield 87 towards the air outlet 84. During this process, the flow guide groove 85 plays a role in stabilizing the flow and reducing gas backflow; the water-cooling plate 88 is installed in the center of the pump body to cool the pump body.

[0036] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An end-exhaust energy-saving dry Roots pump, comprising a pump body (8), characterized in that: The pump body (8) is provided with a rotor assembly (12), the rotor assembly (12) comprising an active Roots rotor (122) and a driven Roots rotor (125), the active Roots rotor (122) and the driven Roots rotor (125) rotating synchronously in opposite directions; the pump body (8) comprises a pump body main body (82), an air inlet (83) is provided at the middle position of the top of the pump body main body (82), a wind speed gathering wind shield (87) is formed on the pump body main body (82) below the rotor assembly (12), an air outlet (84) is formed on the pump body main body (82) at one end of the wind speed gathering wind shield (87), a guide plate (81) is provided on the pump body main body (82) above the air outlet (84), the guide plate (81) extends to the wind speed gathering wind shield (87), and a guide groove (85) is formed between the guide plate (81) and the wind speed gathering wind shield (87).

2. The end-face exhaust energy-saving dry Roots pump according to claim 1, characterized in that: The guide plate (81) is located on the wind speed gathering wind shield (87) and is provided with an inclined structure (86), and the inclined structure (86) is in an upwardly inclined shape.

3. The end-exhaust energy-saving dry Roots pump according to claim 2, characterized in that: The wind speed gathering wind shield (87) is located at the inclined structure (86) and is configured as an arc-shaped chamfered structure, and the corners of the pump body (8) located at the air outlet (84) are configured as arc-shaped chamfered structures.

4. The end-face exhaust energy-saving dry Roots pump according to claim 1, characterized in that: A water cooling plate (88) is installed at the bottom end of the pump body (82), and the water cooling plate (88) and the pump body (82) are an integrated structure.

5. The end-face exhaust energy-saving dry Roots pump according to claim 1, characterized in that: A plurality of heat dissipation fins (4) are arranged at equal intervals on the outer side of the pump body (82); the heat dissipation fins (4) and the pump body (82) are an integrated structure.

6. The end-face exhaust energy-saving dry Roots pump according to claim 1, characterized in that: The rotor assembly (12) comprises a driving shaft (121), a driving gear (123), a driven shaft (124) and a driven gear (126). The driving shaft (121) and the driven shaft (124) are arranged in parallel. The driving shaft (121) and the driven shaft (124) are respectively provided with a driving Roots rotor (122) and a driven Roots rotor (125). The driving shaft (121) is provided with driving gears (123) at both ends of the driving Roots rotor (122). The driven shaft (124) is provided with driven gears (126) meshing with the driving gear (123) at both ends of the driven Roots rotor (125).

7. The end-face exhaust energy-saving dry Roots pump according to claim 6, characterized in that: The active Roots rotor (122) and the driven Roots rotor (125) have the same structure. The active Roots rotor (122) and the driven Roots rotor (125) both comprise a rotor body (1221). A shaft hole for a rotating shaft to pass through is provided in the middle of the rotor body (1221). Through holes (1222) are provided on both sides of the shaft hole of the rotor body (1221). Second arc structures (1226) are symmetrically provided at both ends of the rotor body (1221). First arc structures (1223) are symmetrically provided on both sides of the rotor body (1221). First arc structures (1224) are provided at both ends of the first arc structure (1223) of the rotor body (1221). A second arc structure (1226) is provided between the first arc structure (1224) and the second arc structure (1226). When the active Roots rotor (122) and the driven Roots rotor (125) rotate, the first arc structure (1223) of the active Roots rotor (122) contacts the second arc structure (1226) of the active Roots rotor (122), the second arc structure (1226) of the active Roots rotor (122) contacts the first arc structure (1223) of the active Roots rotor (122), the first arc structure (1224) of the active Roots rotor (122) contacts the second arc structure (1225) of the active Roots rotor (122), and the second arc structure (1225) of the active Roots rotor (122) contacts the first arc structure (1224) of the active Roots rotor (122); The distance between the two axial holes is L, the radius of the first arc structure (1223) is R1, the radius of the second arc structure (1226) is R2, and L=R1+R2.

8. The end-face exhaust energy-saving dry Roots pump according to claim 1, characterized in that: The pump body (8) is respectively provided with a first end plate (3) and a second end plate (5) at both ends; a first gear box (2) is provided on one side of the first end plate (3) and a second gear box (7) is provided on one side of the second end plate (5); the first gear box (2) and the second gear box (7) are used to accommodate a driving gear (123) and a driven gear (126); the top end of the first gear box (2) and the top end of the second gear box (7) are both provided with oil injection holes (6); a driving assembly (1) for driving the driving shaft (121) is provided at one end of the first gear box (2); a first cooling pipeline is provided in the first gear box (2) and a second cooling pipeline is provided in the second gear box (7); the first cooling pipeline and the second cooling pipeline are arched pipelines; the first cooling pipeline and the second cooling pipeline are connected by a pipeline; the first cooling pipeline is provided with a water inlet (11) and the second cooling pipeline is provided with a water outlet (9).

9. The end-face exhaust energy-saving dry Roots pump according to claim 1, characterized in that: A bracket (10) is detachably mounted on the bottom end of the pump body (8); the first end plate (3) and the second end plate (5) both include an end plate body (31); the end plate body (31) is provided with two bearing holes (32); and the end plate body (31) is provided with reinforcing ribs (33) on the outer sides of the bearing holes (32).

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