CN204212988U - A kind of screw rotor cooling unit of screw vacuum pump - Google Patents
A kind of screw rotor cooling unit of screw vacuum pump Download PDFInfo
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- CN204212988U CN204212988U CN201420630475.4U CN201420630475U CN204212988U CN 204212988 U CN204212988 U CN 204212988U CN 201420630475 U CN201420630475 U CN 201420630475U CN 204212988 U CN204212988 U CN 204212988U
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- screw rotor
- screw
- cooling
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- cooling passage
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Abstract
The utility model provides a kind of screw rotor cooling unit of screw vacuum pump, belongs to pump technical field.It solve the problem that screw rotor cooling unit cooling effect is poor, processing is inconvenient of existing screw vacuum pump.This screw rotor cooling unit comprises oil hydraulic pump and tank for coolant, screw rotor has helical tooth, helical tooth offers cooling passage along Hand of spiral, the upper surface of cooling passage has the opening opened wide relative to the external world, the opening of cooling channel is fixed with the insert matched with opening shape, the attached layer of engineering plastics is coated with outside helical tooth, the attached layer of engineering plastics covers insert and opening joint, the liquid feeding end of cooling passage is communicated with tank for coolant by oil hydraulic pump, and the outlet end of cooling passage is communicated with tank for coolant.Helical tooth inside at screw rotor in the screw rotor cooling unit of this screw vacuum pump forms cooling passage, guarantees that the cooling effect of screw rotor is better.
Description
Technical field
The utility model belongs to pump technical field, relates to a kind of screw vacuum pump, particularly a kind of screw rotor cooling unit of screw vacuum pump.
Background technique
Screw vacuum pump utilizes a pair screw rotor, does synchronous high-speed counterrotating and the air-extractor of the air-breathing produced and scavenging action in pump case.Two screw rotors of screw vacuum pump need to carry out fine dynamic balance correction, and are arranged in pump case by bearings, have certain gap between two screw rotors, therefore during pump work, each other without friction, smooth running, noise is low, and active chamber is without the need to lubricant oil.
The type of cooling of existing screw vacuum pump directly cools pump case, namely on pump case, has cooling water passage, logical cooling water outside pump case or bearing, is used for cooling screw pump housing shell and exhaust port temperatures.If screw vacuum pump cooling effect is bad, screw rotor can be caused to be out of shape, and then to cause the fault of screw deadlocking.In order to improve cooling effect, the structure of hollow is processed into by screw rotor in screw vacuum pump manufacturing enterprise, to improve cooling effect.A kind of mode is on screw rotor, process cooling passage through vertically, and this mode is easy to process, but cooling effect is relatively poor.
Another kind of mode processes cooling passage on the helical tooth of screw rotor, such as, and Chinese patent [application number 201310125129.0; Publication number CN103267015A] cooling dry screw vacuum pump and Chinese patent [application number 201310125103.6 in heat pipe; Authorization Notice No. CN103195715A] stainless steel hollow screw, above two sections patent document discloses a kind of stainless steel hollow screw, be made up of the body of rod and helical tooth, the hollow structure of helical tooth is as cooling chamber, cooling medium is injected in cooling chamber, deaeration also seals, thus forms cooling structure in hot tube, bonnet is equipped with cooling oil pump and cools screw axis.
The screw rod of above-mentioned screw vacuum pump adopts the structure of hollow, and the helical tooth of screw rod is that hollow structure forms cooling chamber, and by injecting cooling medium for the cooling to screw rod.Because existing screw rod adopts casting to process usually, from content disclosed in the word of two sections of patent documentations and drawing, the hollow structure of helical tooth obtains in casting process, such structure Problems existing is, casting is difficult to accurate controlled cooling model chamber size, and then has had a strong impact on the dynamic balance performance of screw rotor, and cast member easily produces various defect, cause at the bottom of yield rate, noise and the vibrations of screw vacuum pump also can increase.Further, cooled separately by cooling oil pump to screw axis, well do not utilize cooling chamber, cooling effect is not good.
Summary of the invention
The purpose of this utility model there are the problems referred to above for existing technology, propose a kind of screw rotor cooling unit of screw vacuum pump, the technical problem that the utility model solves on the helical tooth of screw rotor, how to process cooling passage to improve the cooling effect to screw rotor.
The purpose of this utility model realizes by following technical proposal: a kind of screw rotor cooling unit of screw vacuum pump, described screw vacuum pump comprises the pump housing and is arranged on the screw rotor in the pump housing, described screw rotor adopts metallic material to make, it is characterized in that, this screw rotor cooling unit comprises oil hydraulic pump and tank for coolant, described screw rotor has helical tooth, described helical tooth offers cooling passage along Hand of spiral, the upper surface of described cooling passage has the opening opened wide relative to the external world, the opening of described cooling channel is fixed with the insert matched with opening shape, the attached layer of engineering plastics is coated with outside described helical tooth, the attached layer of described engineering plastics covers described insert and opening joint, the liquid feeding end of described cooling passage is communicated with tank for coolant by oil hydraulic pump, the outlet end of described cooling passage is communicated with tank for coolant.
The working principle of the screw rotor cooling unit of this screw vacuum pump is: when screw vacuum pump work, and screw rotor rotates and carries out air-breathing and exhaust.In screw rotor rotation process, oil hydraulic pump extracts the cooling liquid in tank for coolant and is sent to the liquid feeding end of cooling passage, the cooling liquid Hand of spiral flow through along helical tooth is distributed in the cooling passage of helical tooth inside, and get back to tank for coolant by the outlet end of cooling passage, complete the circulation of a cooling liquid.Cooling liquid circulates repeatedly in cooling passage, can take away screw rotor, and the heat particularly on screw rotor helical tooth, improves the cooling effect of screw rotor, prevents screw rotor overheated working life causing deformation effect pumping efficiency and screw rotor.In the course of working of screw rotor, first cast out screw rotor stock, high-precision lathe is used to process cooling passage on the helical tooth of screw rotor, again insert is fixed on the unlimited opening of cooling passage, the upper surface of cooling passage and the external world are closed, finally by the attached layer of mode covered with engineering plastics outside helical tooth of injection moulding.Machining can ensure the dynamic balance performance of screw rotor, and the cooling passage processed can design according to the distribution situation of the computing ballance correction of rotor, more accurately processes, and can remove metallic material in the channel and carry out dynamic balance calibration.The attached layer of engineering plastics covers the position that opening coordinates with insert, the gap between opening and insert can be avoided to be corroded or the leakage of cooling liquid occurs, also improving the decay resistance of helical tooth simultaneously.The screw rotor cooling unit of this screw vacuum pump is by the improvement to the cooling passage structure in screw rotor, under the prerequisite ensureing screw rotor performance, cooling passage can be processed in the helical tooth inside of screw rotor, thus improve the cooling effect to screw rotor.
As preferably, in the screw rotor cooling unit of above-mentioned screw vacuum pump, one end of described screw rotor has the feed pathway distributed vertically, an end face of the through screw rotor of described feed pathway; The other end of described screw rotor has the liquid outlet channel distributed vertically, another end face of the through screw rotor of described liquid outlet channel; The liquid feeding end of described cooling passage is connected with oil hydraulic pump by feed pathway, and the outlet end of described cooling passage is communicated with tank for coolant by liquid outlet channel.Feed pathway and liquid outlet channel are all positioned at screw rotor inside, and distribute vertically, the heat on screw rotor shaft can be taken away through the cooling liquid of feed pathway and liquid outlet channel, improve cooling effect further, be conducive to keeping the temperature consistency on whole screw rotor; Screw rotor adds man-hour, and feed pathway and liquid outlet channel can, directly from screw rotor both ends of the surface central position perforation processing, be processed more convenient, and less on the impact of screw rotor dynamic balance performance.
As preferred further, in the screw rotor cooling unit of above-mentioned screw vacuum pump, the described pump housing is provided with end cap, in described end cap, there is installation cavity, described screw rotor stretches in installation cavity through the pump housing, and described oil hydraulic pump is arranged in installation cavity, and described end cap sidepiece also has liquid entering hole, described liquid entering hole is communicated with tank for coolant, is also provided with oil sealing between the described pump housing and screw rotor.Oil hydraulic pump is arranged in the installation cavity between end cap and the pump housing, make oil hydraulic pump better and screw vacuum pump integrated, reduce the overall volume of equipment, and, such mounting type is more conducive to flow and the flow velocity of controlled cooling model liquid, can regulate cooling liquid delivery volume according to the load of reality.
As preferred further, in the screw rotor cooling unit of above-mentioned screw vacuum pump, the side of described screw rotor has the liquid outlet be connected with liquid outlet channel, and described liquid outlet channel is positioned at screw rotor end place and is closed by blocking.Such structure is offered outside the requirement of position meeting liquid outlet, the advantage of easy to process, the good cooling results maintaining that liquid outlet channel structure brings.
In the screw rotor cooling unit of above-mentioned screw vacuum pump, the integral structure that described insert adopts metallic material to make, described insert is bar shaped and along the aperture distribution of cooling channel, the opening of described cooling channel has draw-in groove, described insert has the card edge with above-mentioned pocket matches.Insert adopts monolithic construction to ensure the sealing of helical tooth opening, and adopt the good metal of pliability to be convenient to the installation of insert, the intensity of metallic material is relatively large and heat-conductive characteristic is better.
Compared with prior art, the advantage of the screw rotor cooling unit of this screw vacuum pump is:
Helical tooth inside at screw rotor in the screw rotor cooling unit of 1, this screw vacuum pump forms cooling passage, and is connected with the tank for coolant of pump outside, and coolant temperature lifting, monitors easy.Cooling liquid circulates repeatedly in cooling passage with tank for coolant, can take away screw rotor, the heat particularly on screw rotor helical tooth, thus guarantees that the cooling effect of screw rotor is better.
After in the screw rotor cooling unit of 2, this screw vacuum pump, screw rotor is cast, machining is carried out to screw rotor, helical tooth processes the cooling passage of the opening open along Hand of spiral distribution, again insert is fixed on the opening of cooling passage, make the opening of insert partially enclosed relative to the external world, thus cooling liquid can be circulated at cooling passage.Cooling passage is formed by machining, the dynamic balance performance of screw rotor can be ensured, ensure that screw rotor uniform wall thickness simultaneously, while improving the cooling effect to screw rotor, also maintain the performance of screw rotor, improve the yield rate of screw rotor.
In the screw rotor cooling unit of 3, this screw vacuum pump screw rotor helical tooth outside the attached layer of covered with engineering plastics, the attached layer of engineering plastics covers the position that opening coordinates with insert, can screw rotor matrix be made from corrosion or the leakage avoiding occurring cooling liquid in the gap between sealed open and insert, also improve the decay resistance of helical tooth simultaneously.
Accompanying drawing explanation
Fig. 1 is the screw rotor cooling unit structural representation of this screw vacuum pump.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
In figure, 1, the pump housing; 2, screw rotor; 21, helical tooth; 211, cooling passage; 22, feed pathway; 23, liquid outlet channel; 24, liquid outlet; 3, oil hydraulic pump; 4, insert; 41, card edge; 5, the attached layer of engineering plastics; 6, end cap; 61, installation cavity; 62, liquid entering hole; 7, oil sealing; 8, block.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
Screw vacuum pump comprises the pump housing 1 and screw rotor 2, and screw rotor 2 is arranged in the pump housing 1, and screw rotor 2 adopts metallic material to make.The screw rotor cooling unit of this screw vacuum pump comprises oil hydraulic pump 3, tank for coolant and cooling passage 211.
Specifically, as shown in Figure 1, screw rotor 2 has helical tooth 21, cooling passage 211 is opened on the helical tooth 21 of screw rotor 2 along helical tooth 21 Hand of spiral.The upper surface of cooling passage 211 has the opening opened wide relative to the external world, and the opening of cooling channel is fixed with the insert 4 matched with opening shape.In the present embodiment, as shown in Figure 2, the integral structure that insert 4 adopts metallic material to make, the insert 4 in bar shaped is along the aperture distribution of cooling channel, and the opening of cooling channel has draw-in groove, insert 4 has with the card of pocket matches along 41.Insert 4, by the closure of openings of cooling passage 211, retains the part that cooling passage 211 is positioned at the helical tooth 21 of screw rotor 2, for the circulation of cooling liquid.The liquid feeding end of cooling passage 211 is communicated with tank for coolant by oil hydraulic pump 3, and the outlet end of cooling passage 211 is communicated with tank for coolant.In the product of reality, the gear-box that tank for coolant can have for screw pump itself, cooling liquid is supplied by gear-box, and used cooling liquid is got back to after gear-box carries out cooling down and reused.
As shown in Figure 1, preferably, one end of screw rotor 2 has the feed pathway 22 distributed vertically, an end face of the through screw rotor 2 of feed pathway 22.The other end of screw rotor 2 has the liquid outlet channel 23 distributed vertically, another end face of the through screw rotor 2 of liquid outlet channel 23.The liquid feeding end of cooling passage 211 is connected with oil hydraulic pump 3 by feed pathway 22, and the outlet end of cooling passage 211 is communicated with tank for coolant by liquid outlet channel 23.In the course of working of reality, can punch with feed pathway 22 and the just right position of liquid outlet channel 23 respectively in cooling passage 211, feed pathway 22 is communicated with cooling passage 211 respectively with liquid outlet channel 23.It is inner that feed pathway 22 and liquid outlet channel 23 are all positioned at screw rotor 2, and distribute vertically, the heat on screw rotor 2 shaft can be taken away through the cooling liquid of feed pathway 22 and liquid outlet channel 23, improve cooling effect further, be conducive to keeping the temperature consistency on whole screw rotor 2.Screw rotor 2 adds man-hour, and feed pathway 22 and liquid outlet channel 23 can, directly from screw rotor 2 both ends of the surface central position perforation processing, be processed more convenient, and less on the impact of screw rotor 2 dynamic balance performance.
As preferred further, the pump housing 1 is fixed with end cap 6, end cap 6 has installation cavity 61, screw rotor 2 stretches in installation cavity 61 through the pump housing 1, oil hydraulic pump 3 is arranged in the installation cavity 61 between end cap 6 and the pump housing 1, and the feed pathway 22 of cooling liquid by screw rotor 2 end can be delivered in cooling passage 211 by oil hydraulic pump 3 work.End cap 6 sidepiece also has liquid entering hole 62, and liquid entering hole 62 is communicated with tank for coolant, is provided with oil sealing 7 between the pump housing 1 and screw rotor 2, prevents cooling liquid from entering in the pump housing 1.Such mounting type is more conducive to flow and the flow velocity of controlled cooling model liquid, according to the load of reality, can regulate cooling liquid supply.
As preferred further, the side of screw rotor 2 has the liquid outlet 24 be connected with liquid outlet channel 23, and liquid outlet channel 23 is positioned at screw rotor 2 end and is closed by blocking 8.Such structure is offered outside the requirement of position meeting liquid outlet 24, the advantage of easy to process, the good cooling results maintaining that liquid outlet channel 23 structure brings.
As shown in Figure 1, be coated with the attached layer 5 of engineering plastics outside the helical tooth 21 of screw rotor 2, the attached layer 5 of engineering plastics covers insert 4.The attached layer 5 of engineering plastics covers the position that opening coordinates with insert 4, the gap between opening and insert 4 can be avoided to be corroded or the leakage of cooling liquid occurs, also improving the decay resistance of helical tooth 21 simultaneously.
The course of working of the screw rotor 2 in the screw rotor cooling unit of this screw vacuum pump, first cast out screw rotor 2 stock, use high-precision lathe to process cooling passage 211 on the helical tooth 21 of screw rotor 2, cooling passage 211 adopts machining can ensure the dynamic balance performance of screw rotor 2.Again insert 4 is fixed on the unlimited opening of cooling passage 211, the upper surface of cooling passage 211 and the external world is closed, finally by the attached layer 5 of mode covered with engineering plastics outside helical tooth 21 of injection moulding, improves the decay resistance of helical tooth 21.
The working principle of the screw rotor cooling unit of this screw vacuum pump is: when screw vacuum pump work, and screw rotor 2 rotates and carries out air-breathing and exhaust.In screw rotor 2 rotation process, oil hydraulic pump 3 extracts the cooling liquid in tank for coolant and is sent to the liquid feeding end of cooling passage 211, the cooling liquid Hand of spiral flow through along helical tooth 21 is distributed in the cooling passage 211 of helical tooth 21 inside, and get back to tank for coolant by the outlet end of cooling passage 211, complete the circulation of a cooling liquid.Cooling liquid circulates repeatedly in cooling passage 211, can take away screw rotor 2, the heat particularly on screw rotor 2 helical tooth 21, improves the cooling effect of screw rotor 2, prevent screw rotor 2 overheated causing to be out of shape, affect the working life of pumping efficiency and screw rotor 2.The screw rotor cooling unit of this screw vacuum pump is by the improvement to cooling passage 211 structure in screw rotor 2, under the prerequisite ensureing screw rotor 2 performance, cooling passage 211 can be processed in helical tooth 21 inside of screw rotor 2, thus improve the cooling effect to screw rotor 2.Working principle and the screw vacuum pump of screw air compressor are similar, and the screw rotor cooling unit of this screw vacuum pump can also directly apply in screw air compressor, to improve the cooling effect of screw air compressor.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present utility model or surmount the scope that appended claims defines.
Although more employ the pump housing 1, screw rotor 2, helical tooth 21, cooling passage 211, feed pathway 22, liquid outlet channel 23, liquid outlet 24, oil hydraulic pump 3, insert 4 herein, block along 41, the attached layer 5 of engineering plastics, end cap 6, installation cavity 61, liquid entering hole 62, oil sealing 7, the term such as blocking 8, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present utility model more easily; The restriction that they are construed to any one additional is all contrary with the utility model spirit.
Claims (5)
1. the screw rotor cooling unit of a screw vacuum pump, described screw vacuum pump comprises the pump housing (1) and is arranged on the screw rotor (2) in the pump housing (1), described screw rotor (2) adopts metallic material to make, it is characterized in that, this screw rotor cooling unit comprises oil hydraulic pump (3) and tank for coolant, described screw rotor (2) has helical tooth (21), described helical tooth (21) offers cooling passage (211) along Hand of spiral, the upper surface of described cooling passage (211) has the opening opened wide relative to the external world, the opening of described cooling channel is fixed with the insert (4) matched with opening shape, described helical tooth (21) outside is coated with the attached layer of engineering plastics (5), the attached layer of described engineering plastics (5) covers described insert (4) and opening joint, the liquid feeding end of described cooling passage (211) is communicated with tank for coolant by oil hydraulic pump (3), the outlet end of described cooling passage (211) is communicated with tank for coolant.
2. the screw rotor cooling unit of screw vacuum pump according to claim 1, it is characterized in that, one end of described screw rotor (2) has the feed pathway (22) distributed vertically, an end face of described feed pathway (22) through screw rotor (2); The other end of described screw rotor (2) has the liquid outlet channel (23) distributed vertically, another end face of described liquid outlet channel (23) through screw rotor (2); The liquid feeding end of described cooling passage (211) is connected with oil hydraulic pump (3) by feed pathway (22), and the outlet end of described cooling passage (211) is communicated with tank for coolant by liquid outlet channel (23).
3. the screw rotor cooling unit of screw vacuum pump according to claim 2, it is characterized in that, the described pump housing (1) is provided with end cap (6), there is in described end cap (6) installation cavity (61), described screw rotor (2) stretches in installation cavity (61) through the pump housing (1), described oil hydraulic pump (3) is arranged in installation cavity (61), described end cap (6) sidepiece also has liquid entering hole (62), described liquid entering hole (62) is communicated with tank for coolant, oil sealing (7) is also provided with between the described pump housing (1) and screw rotor (2).
4. the screw rotor cooling unit of screw vacuum pump according to claim 3, it is characterized in that, the side of described screw rotor (2) has the liquid outlet (24) be connected with liquid outlet channel (23), and described liquid outlet channel (23) is positioned at screw rotor (2) end and is closed by blocking (8).
5. the screw rotor cooling unit of screw vacuum pump according to any one of claim 1 to 4, it is characterized in that, the integral structure that described insert (4) adopts metallic material to make, described insert (4) is in bar shaped and along the aperture distribution of cooling channel, the opening of described cooling channel has draw-in groove, described insert (4) has with the card of above-mentioned pocket matches along (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420630475.4U CN204212988U (en) | 2014-10-28 | 2014-10-28 | A kind of screw rotor cooling unit of screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420630475.4U CN204212988U (en) | 2014-10-28 | 2014-10-28 | A kind of screw rotor cooling unit of screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204212988U true CN204212988U (en) | 2015-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420630475.4U Withdrawn - After Issue CN204212988U (en) | 2014-10-28 | 2014-10-28 | A kind of screw rotor cooling unit of screw vacuum pump |
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| Country | Link |
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| CN (1) | CN204212988U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329257A (en) * | 2014-10-28 | 2015-02-04 | 马德宝真空设备集团有限公司 | Screw rotor cooling device of screw vacuum pump |
| CN106704176A (en) * | 2016-12-02 | 2017-05-24 | 马德宝真空设备集团有限公司 | Cooling system of Roots pump |
| CN107231049A (en) * | 2017-06-20 | 2017-10-03 | 上海蔚来汽车有限公司 | Rotor liquid cooling structure |
| CN109538479A (en) * | 2019-01-21 | 2019-03-29 | 济南冶金化工设备有限公司 | Vapor compressor |
| CN114738280A (en) * | 2022-04-10 | 2022-07-12 | 江苏天丰真空泵有限公司 | Oil-free screw type vacuum pump with cooling device |
-
2014
- 2014-10-28 CN CN201420630475.4U patent/CN204212988U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104329257A (en) * | 2014-10-28 | 2015-02-04 | 马德宝真空设备集团有限公司 | Screw rotor cooling device of screw vacuum pump |
| CN104329257B (en) * | 2014-10-28 | 2017-01-18 | 马德宝真空设备集团有限公司 | Screw rotor cooling device of screw vacuum pump |
| CN106704176A (en) * | 2016-12-02 | 2017-05-24 | 马德宝真空设备集团有限公司 | Cooling system of Roots pump |
| CN107231049A (en) * | 2017-06-20 | 2017-10-03 | 上海蔚来汽车有限公司 | Rotor liquid cooling structure |
| CN107231049B (en) * | 2017-06-20 | 2023-07-07 | 上海蔚来汽车有限公司 | Liquid cooling structure of motor rotor |
| CN109538479A (en) * | 2019-01-21 | 2019-03-29 | 济南冶金化工设备有限公司 | Vapor compressor |
| CN114738280A (en) * | 2022-04-10 | 2022-07-12 | 江苏天丰真空泵有限公司 | Oil-free screw type vacuum pump with cooling device |
| CN114738280B (en) * | 2022-04-10 | 2024-04-09 | 江苏天丰真空泵有限公司 | Oilless screw vacuum pump with cooling device |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20150318 Effective date of abandoning: 20170118 |
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| AV01 | Patent right actively abandoned |