CN216381858U - Low-noise double-screw vacuum pump - Google Patents
Low-noise double-screw vacuum pump Download PDFInfo
- Publication number
- CN216381858U CN216381858U CN202121891797.0U CN202121891797U CN216381858U CN 216381858 U CN216381858 U CN 216381858U CN 202121891797 U CN202121891797 U CN 202121891797U CN 216381858 U CN216381858 U CN 216381858U
- Authority
- CN
- China
- Prior art keywords
- pump body
- screw
- vacuum pump
- low noise
- noise reduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model discloses a low-noise double-screw vacuum pump which comprises a pump body, wherein a left end cover and a right end cover are respectively arranged at the left end and the right end of the pump body, a driving screw and a driven screw are also arranged in the pump body, the driving screw extends out of the right end cover and is connected to an output shaft of a motor, a main gear is fixedly arranged on the driving screw, a secondary gear is arranged on the driven screw, the main gear and the secondary gear are identical in structure and are meshed with each other, a silencing structure is also arranged on the outer side of the pump body and comprises a fixing cavity sleeved at one side end of the pump body, one end, far away from the pump body, of the fixing cavity is closed, vertical partition plates are arranged in the fixing cavity, the two partition plates are provided, a plurality of vent holes are formed in each of the two partition plates, and the vent holes in the two partition plates are arranged in a staggered mode. The noise reduction structure is sleeved on the outer side of the pump body, and the sleeved noise reduction structure is positioned at the rotary connection position of the screw and the pump body, so that the noise reduction structure has a good noise reduction effect on vibration and friction generated at the connection position, and simple, convenient and stable noise reduction is realized.
Description
Technical Field
The utility model relates to the technical field of screw vacuum pumps, in particular to a low-noise double-screw vacuum pump.
Background
The screw vacuum pump is an air pumping device which utilizes a pair of screws to perform synchronous high-speed reverse rotation in a pump shell to generate air suction and exhaust functions, and has the main advantages of compact structure, long service life, good dynamic balance, no need of lubrication and high pumping speed. However, the existing screw type vacuum pump has the defect of large noise, and is easy to generate large noise pollution to the environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a double-screw vacuum pump which is simple in structure and can reduce noise.
In order to achieve the purpose, the utility model discloses a low-noise double-screw vacuum pump, which adopts the following technical scheme:
the utility model provides a low noise twin-screw vacuum pump, includes the pump body, both ends are provided with left end cover, right-hand member lid respectively about the pump body, still be provided with initiative screw rod, driven screw rod in the pump body, initiative screw rod stretches out and connects in the output shaft of motor in the right-hand member lid, and the fixed master gear that is provided with on the initiative screw rod is provided with the pinion on the driven screw rod, the master gear is the same with pinion structure and intermeshing, the pump body outside still is provided with noise cancelling structure, noise cancelling structure locates the fixed chamber of a pump body side including the cover, the one end that the pump body was kept away from in fixed chamber is sealed, be provided with vertical baffle in the fixed intracavity, the baffle is provided with two, all is provided with a plurality of air vents on two baffles, and the air vent dislocation on two baffles is laid.
The utility model further improves the low-noise double-screw vacuum pump, and is characterized in that positioning plates with L-shaped sections are symmetrically distributed on the upper side and the lower side of one side end, close to a silencing structure, of the pump body, and the outer side wall of the fixing cavity is clamped in the positioning plates.
The utility model further improves the low-noise double-screw vacuum pump, and the inner side wall of the fixed cavity is also provided with an elastic pad which props against the pump body.
The utility model further improves the low-noise double-screw vacuum pump, and is characterized in that the side wall of the fixing cavity is provided with a screw hole, the positioning plate is also provided with a second screw hole, and the screw hole and the second screw hole are in threaded connection with bolts.
The utility model further improves the low-noise double-screw vacuum pump, and is characterized in that a partition board close to a pump body is provided with silencing cotton, and the silencing cotton is staggered with the ventilation holes on the partition board.
The utility model further improves the low-noise double-screw vacuum pump, and a second silencing cotton is arranged on one closed end face of the fixed cavity.
Compared with the prior art, the utility model has the beneficial effects that:
the noise reduction structure is sleeved on the outer side of the pump body, and the sleeved noise reduction structure is positioned at the rotary connection position of the screw and the pump body, so that the noise reduction structure has a good noise reduction effect on vibration and friction generated at the connection position, and simple, convenient and stable noise reduction is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: the pump body 1, 2 initiative screws, 3 fixed chambeies, 4 baffles, 5 air vents, 6 locating plates, 7 cushion, 8 amortization cotton, 9 second amortization cotton.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a low-noise twin-screw vacuum pump comprises a pump body 1, wherein a left end cover and a right end cover are respectively arranged at the left end and the right end of the pump body, a driving screw 2 and a driven screw are further arranged in the pump body, the driving screw extends out of the right end cover and is connected to an output shaft of a motor, a main gear is fixedly arranged on the driving screw, a pinion is arranged on the driven screw, the main gear and the pinion are identical in structure and are meshed with each other, and the structure is a common twin-screw vacuum pump structure. Further, the outside of the pump body 1 is provided with a silencing structure, the silencing structure comprises a fixed cavity 3 which is sleeved at one side end of the pump body, one end of the fixed cavity 3, which is far away from the pump body 1, is sealed, a vertical partition plate 4 is arranged in the fixed cavity 3, the partition plates 4 are provided with two air holes 5, the two partition plates 4 are provided with a plurality of air holes 5, and the air holes 5 on the two partition plates 4 are arranged in a staggered mode. The vibration and friction generated by the rotation of the screw in the pump body are generated by noise, particularly, the noise can pass through the fixed cavity at the rotating joint of the screw and the pump body and the gear joint between the double screws, and the frequency spectrum of the noise can move to high frequency or ultrahigh frequency when passing through the vent hole in the fixed cavity, so that the audible sound component in the frequency spectrum is obviously reduced, and the noise reduction is realized. The silencing structure can be provided with two, be divided into the left and right sides end that is located the pump body.
Furthermore, the upper side and the lower side of one side end of the pump body 1 close to the silencing structure are symmetrically provided with positioning plates 6 with L-shaped sections, and the outer side wall of the fixed cavity 3 is clamped in the positioning plates. The positioning plate is arranged to further ensure the limit of the silencing structure, and the stability of the silencing structure for fixing is ensured.
Furthermore, an elastic pad is arranged on the inner side wall of the fixed cavity and abuts against the pump body. The elastic cushion makes the fixed cavity less affected by the vibration of the pump body. The locating plate sets up two, also makes the structure more simple.
Furthermore, a screw hole (not shown) is formed in the side wall of the fixing cavity 3, a second screw hole is also formed in the positioning plate, and bolts are screwed in the screw hole and the second screw hole. The arrangement of the bolt screw hole enables the noise reduction structure to be fixed more stably.
Furthermore, a partition plate 4 close to the pump body 1 is provided with silencing cotton 8, and the silencing cotton is staggered with the vent holes on the partition plate. And a second silencing cotton 9 is arranged on one closed end face of the fixed cavity. The noise reduction and silencing effect is better due to the arrangement of the silencing cotton.
The working principle of the double-screw vacuum pump is that when the double-screw vacuum pump works, the rotating connection position of the screw and the pump body and the gear connection position between the double screws generate larger noise, and the two positions are positioned at the left side end and the right side end in the pump body, so that the silencing structures are mainly arranged at the left end and the right end of the pump body, most of the noise generated in the pump body can pass through the silencing structures, and is subjected to noise reduction and silencing by the silencing cotton in the silencing structures and the silencing holes distributed in a staggered mode, and a better silencing effect is achieved.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a low noise twin-screw vacuum pump, includes the pump body, both ends are provided with left end lid, right-hand member lid respectively about the pump body, still be provided with initiative screw rod, driven screw rod in the pump body, the initiative screw rod stretches out to connect in the output shaft of motor in the right-hand member lid, and the fixed master gear that is provided with on the initiative screw rod is provided with the pinion on the driven screw rod, the master gear is the same with pinion structure and intermeshing, its characterized in that: the pump body outside still is provided with sound attenuation structure, sound attenuation structure is including the fixed chamber of cover locating pump body one side, the one end that the pump body was kept away from in fixed chamber is sealed, be provided with vertical baffle in the fixed chamber, the baffle is provided with two, all is provided with a plurality of air vents on two baffles, and the air vent on two baffles is misplaced and is laid.
2. A low noise twin-screw vacuum pump according to claim 1, characterized in that: the pump body is close to the locating plate that the bilateral symmetry was laid about one side end of amortization structure and is had the cross-section and be the L shape, the lateral wall card in fixed chamber is in the locating plate.
3. A low noise twin-screw vacuum pump according to claim 2, characterized in that: and the inner side wall of the fixed cavity is also provided with an elastic pad which is propped against the pump body.
4. A low noise twin-screw vacuum pump according to claim 3, characterized in that: the side wall of the fixing cavity is provided with a screw hole, the positioning plate is also provided with a second screw hole, and the screw hole and the second screw hole are connected with a bolt in a threaded manner.
5. A low noise twin-screw vacuum pump according to claim 1, characterized in that: the baffle plate close to the pump body is provided with silencing cotton, and the silencing cotton is staggered with the ventilation holes in the baffle plate.
6. A low noise twin-screw vacuum pump according to claim 1, characterized in that: and a second silencing cotton is arranged on the closed end surface of the fixed cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121891797.0U CN216381858U (en) | 2021-08-12 | 2021-08-12 | Low-noise double-screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121891797.0U CN216381858U (en) | 2021-08-12 | 2021-08-12 | Low-noise double-screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216381858U true CN216381858U (en) | 2022-04-26 |
Family
ID=81240086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121891797.0U Active CN216381858U (en) | 2021-08-12 | 2021-08-12 | Low-noise double-screw vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216381858U (en) |
-
2021
- 2021-08-12 CN CN202121891797.0U patent/CN216381858U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216381858U (en) | Low-noise double-screw vacuum pump | |
| CN204140429U (en) | Roots blower | |
| CN213899821U (en) | Speed reducer box with silencing cavity | |
| CN214998087U (en) | Air compressor machine air inlet filters amortization structure | |
| CN211630008U (en) | Noise-reduction type explosion-proof motor | |
| CN213684604U (en) | Air blower with built-in micro-perforated plate silencer | |
| CN208416919U (en) | A kind of oil pump structure of gear box | |
| CN210919447U (en) | Double-screw vacuum pump | |
| CN211152423U (en) | Communication cabinet with noise reduction and sound insulation functions | |
| CN212508886U (en) | Low-noise rectangular centrifugal fan | |
| CN209959579U (en) | Non-independent integral fan silencer | |
| CN215567798U (en) | Low-noise large-transmission-ratio speed reducer gear | |
| CN208565512U (en) | A kind of low-noise compact type speed reducer | |
| CN211693379U (en) | Oil leakage prevention worm and gear speed reducer | |
| CN109386506A (en) | A kind of centrifugal pump Noise insulati on device and its centrifugal pump | |
| CN220302683U (en) | Multi-point linkage rotary speed reducer | |
| CN219672844U (en) | Air cooling oil-free dry Roots vacuum pump | |
| CN218780552U (en) | Low-noise axial flow fan | |
| CN220687575U (en) | Internal gear pump capable of operating in forward and reverse directions | |
| CN212839282U (en) | Double-shaft workbench of hollow harmonic bearing type speed reducer | |
| CN213870291U (en) | Roots blower with sound insulation device | |
| CN220906015U (en) | Mute box body of container | |
| CN212055768U (en) | Just, gear box of making an uproar falls in installation type | |
| CN213270268U (en) | Mute roots blower is with impeller, air-blower and blower device | |
| CN216929733U (en) | Dust collector motor with noise reduction function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |