• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Transmission between drive shaft (13) and a driven shaft (9), which transmission (4) comprises a housing (10) and at least one driven gear (11) mounted on the driven shaft (9) and a drive gear (14) that is mounted on a drive shaft (13), characterized in that the housing is provided with a discharge opening (20), which discharge opening (20) is placed in the radial extension of one of the gear wheels (11, 14).
    公开号:BE1025222B1
    申请号:E2018/5037
    申请日:2018-01-24
    公开日:2018-12-13
    发明作者:Hove Linus Van；Man Steven De
    申请人:Atlas Copco Airpower Naamloze Vennootschap；
    IPC主号:
    专利说明:

    Transmission and compressor or vacuum pump provided with such transmission.
    The present invention relates to a transmission and a compressor or vacuum pump provided with such a transmission.
    It is known that a transmission between a drive shaft of a motor and the driven shaft of, for example, a rotor of a compressor element, is provided with a housing in which the gear wheels of the transmission are located.
    In order to ensure proper operation, oil is injected into the transmission housing as a lubricating fluid.
    Since the driven shaft runs from the compressor element to the transmission, seals are provided between the compressor element and the transmission.
    However, there will always be a leakage flow to a certain extent, as a result of which air will end up in the housing of the transmission and which causes a pressure build-up in the transmission.
    It is important to get rid of such overpressure, since the aforementioned seals must not be exposed to a too large pressure difference because this can affect their proper functioning.
    B E2018 / 5037
    If the pressure difference is too large, it is possible that air will leak from the transfer to the compressor element. This air will also contain the injected lubricant.
    Such a situation should be avoided at all times, since this lubricating liquid is undesirable in the compressor element and will ensure that the compressed air that the compressor element generates in this case would be contaminated with the lubricating liquid.
    Certainly in the case of oil-free applications where pure compressed air is required, such a situation is not permissible.
    The overpressure in the environment could be let off. This means that air with lubricant enters the atmosphere. Such a situation is preferably avoided for oil-free applications, since this lubricating liquid ends up on or in the vicinity of the machine and can therefore accidentally end up in the machine.
    Therefore, the housing of the transmission is connected to an oil separator in order to be able to purify the oil air mixture in the transmission via the oil separator and blow it off to the environment. The separated oil can in this case be returned to an oil reservoir, to be subsequently injected back into the transmission.
    B E2018 / 5037
    In the known transmissions, compressed gas is used to obtain a suction from the transmission to the oil separator via a venturi channel.
    For this a part of the compressed gas generated by the compressor is used which is branched to the aforementioned venturi channel. As a result, the oil-air mixture will be sucked out of the transmission, the compressed gas and the oil-air mixture being blown through a filter.
    This naturally implies a loss of efficiency of the machine.
    In addition, the branch may get interrupted or come loose, causing the venturi channel to lose its function, so that no extraction to the oil separator takes place.
    Alternative is It is also possible to through a external (electricity) I source one extraction to obtained with For example, an fan.But keep this solution an extra consumption in from electricity, e n also one in addition risk if the
    external source fails in the event of a power failure or cable break.
    The present invention has for its object to provide a solution to at least one of the aforementioned and other disadvantages.
    BE2018 / 5037
    The present invention has a device as object, a transmission between a drive shaft and a driven shaft, which transmission comprises a housing and at least a driven gear which is mounted on the driven shaft and a drive gear which is mounted on a drive shaft, characterized in that the housing is provided with a discharge opening, which discharge opening is placed in the radial extension of one of the gear wheels.
    By 'radially extended' is meant here that the discharge opening extends in a radial direction of the gear. That is, according to a direction of a line extending from the center of the gear.
    The gearwheel will generate a so-called 'gearwind' due to its rotation, i.e. an air flow or swirl through the rotating teeth of the gearwheel, which will cause the oil / air mixture in the transmission housing to be flung away radially.
    An advantage of the gear placed in the radial extension of the discharge opening is that the oil-air mixture is guided precisely through this aforementioned 'gearwind' to this discharge opening.
    The drain opening can further be connected to an oil separator or oil filter and / or to an oil reservoir.
    Due to the effect of the aforementioned 'gearwind', the housing will be emptied and the oil / air mixture will be emptied
    B E2018 / 5037 be sent to the oil reservoir or to the oil filter or oil separator.
    Another important advantage is that this system does not require an external energy source, i.e. compressed air or electricity.
    This also means that there is no risk of failure or malfunction due to the failure of this external energy source.
    Moreover, it is an automatic self-regulating system: the faster the gears rotate, the more leakage flow there will be from the compressor element to the transmission and the emptying of the transmission housing will become larger as the gears rotate faster.
    In short, this means that the amount of draining of the housing will automatically adjust to the amount of leakage flow.
    Preferably, but not necessarily for the invention, the discharge opening is placed in the radial extension of the largest gear.
    After all, the largest gearwheel will generate the largest 'gearwind', so that its effect will also be greater and more oil-air mixture can be discharged to the oil reservoir.
    The invention also relates to a compressor or vacuum pump which is provided with a compressor or vacuum pump element and a
    BE2018 / 5037 motor for driving the compressor or vacuum pump element and wherein the compressor or the vacuum pump element is further provided with a transmission according to the invention between a drive shaft of the motor and a driven shaft of the compressor or vacuum pump element.
    With the insight to better demonstrate the features of the invention, a few preferred embodiments of a transmission according to the invention and a compressor or vacuum pump provided with such a transmission are described below as an example without any limiting character, with reference to the accompanying drawings, in which :
    Figure 1 schematically represents a transmission according to the invention;
    figure 2 schematically represents a view according to the section X-X 'from figure 1;
    figure 3 schematically represents an alternative embodiment of figure 2.
    The compressor 1 shown in Figure 1 comprises essentially a compressor element 2, a motor 3 and a transmission 4 between the compressor element 2 and the motor 3.
    The compressor element in this case is a screw compressor element
    2, which comprises a compressor element housing 5 and two co-operating screw rotors 6a, 6b, namely a male screw rotor
    6a and a female screw rotor
    6b, the lobes 7 of which rotate together in one another.
    B E2018 / 5037
    Both rotors 6a, 6b are mounted in their compressor element housing 5 by means of their shaft 8.
    The shaft 8 of one of rotors 6b is extended and forms the driven shaft 9.
    This driven shaft 9 extends into the housing 10 of the transmission 4 and the driven gear 11 is mounted on its end.
    In order to close the compressor element 2 from the transmission 4, two seals 12a, 12b are provided on the driven shaft 9: an oil seal 12a and an air seal 12b.
    The motor 3 has a drive shaft 13 which extends into the housing 10 of the transmission 4 and on which a drive gear 14 is arranged which engages the aforementioned driven gear 11.
    The transmission 4 comprises the aforementioned housing 10 with the aforementioned gear wheels 11 and 14 therein.
    It is, of course, not excluded that additional gear wheels are provided in the housing 10 between the driven gear wheel 11 and the drive gear wheel 14.
    This also does not exclude that the motor 3 is located in the housing 10 of the transmission 4.
    B E2018 / 5037
    The transmission 4 is further provided with an oil reservoir 15 and a filter element 16 connected thereto, in order to be able to filter the oil from the oil air mixture which is ventilated to the environment via the oil reservoir 15 and filter element 16.
    The injected oil is collected in the oil reservoir 15.
    Furthermore, in the example shown, the compressor 1 is also provided with an oil circuit 17, which with an oil pump 18 is the oil that is collected in oil reservoir 15, being the oil flowing back from the housing 10 and the oil separated by the filter element 16, can return to the transmission 4 and / or the motor 3. In addition, the oil circuit 17 is also provided with an oil filter 19 to remove contaminants from the oil.
    According to the invention, the housing of the transmission is provided with a discharge opening 20, which is placed in the radial extension of the largest gear wheel 14.
    As already stated above, this means that the discharge opening 20 extends in a radial direction X-X 'of the gear 14. That is, in a direction X-X' of a line extending from the center 21 of the largest gear 14.
    In this case, the drive gear 14 is the largest sprocket.
    B E2018 / 5037
    It is not necessary for the invention that the discharge opening 20 extends in a radial direction of the largest gear, in this case the drive gear 14. It is also possible that the discharge opening 20 extends in a radial direction of a smaller gear, in this case the driven gear 11.
    In the example shown, the discharge opening 20 is also placed under the drive gear 14. This has the advantage that gravity will help with the removal of the heavier oil particles in the housing 10 of the transmission 4.
    Furthermore, in the example shown, the discharge opening 20 is located in the plane X-X 'of the driving gear 14. This means that the discharge opening 20 will not lie in front of or behind the plane X-X 'of the gear wheel 14. This will also help in draining the oil / air mixture from the housing 10.
    A discharge line 22 leaves from the discharge opening 20 and connects to the discharge opening 20 and in this case extends in the plane X-X 'of the gear wheel 14.
    The housing 10 is connected to the oil reservoir 15 via this discharge line 22.
    The operation of the compressor 1 is very simple and as follows.
    B E2018 / 5037
    During the operation of the compressor 1, the motor 3 will drive the drive gear 14, the movement via the driven gear 11 being transferred to the driven shaft 9 of the compressor element 2.
    Hereby oil will be injected into the transmission 4 and possibly also into the motor 3 for the cooling and / or lubrication of the gear wheels 11, 14, bearings and other components.
    As a result of the operation of the compressor 1, a certain pressure build-up will take place in the transmission 4, since the air seal 12b on the driven shaft 9 permits a certain leakage current in the direction of the compressor element 2 towards the transmission 4.
    As a result, there will be an oil-air mixture at an elevated pressure in the housing 10 of the transmission 4.
    Due to the rotation of the gear wheel 14, a so-called 'gearwind' will arise in which an air flow or swirl is worked up by the rotating teeth of the gear wheel. This air flow is shown schematically by the arrows in Figure 2.
    As a result of this flow, the oil-air mixture present in the housing 10 is, as it were, automatically led to the discharge opening 20, and thus via the discharge line 22 to the oil reservoir 15 and the filter element 16.
    B E2018 / 5037
    As a result, the supplied leakage air that enters the housing 10 through the oil seal 12a will immediately be discharged. This results in a limited under or over pressure in the housing 10 which falls within the allowable pressure difference of the oil seal 12a. From the discharge opening 20, the further system consisting of the discharge line 22, the oil reservoir 15 and the filter element 16 will be at overpressure, which is determined by the pressure drop across the filter element 16.
    A separation of the oil can take place in the filter element 16, so that pure air can be vented to the environment. The separated oil can be collected in the oil reservoir 15 and injected back into the machine 1 via the oil circuit 17.
    Despite the fact that, in the example shown, discharge opening 20 is placed in the radial extension of the drive gear 14 at the bottom of the housing 10, this is not necessary for the invention.
    The discharge opening 20 could also be placed in the radial extension of the driven gear 11, or of other gear wheels if present.
    It is also not necessary according to the invention for it to be a compressor 1 which is provided with a transmission 4 according to the invention. The machine could also be a vacuum pump.
    B E2018 / 5037 '12
    Figure 3 shows a variant of Figure 2, in which case the discharge line 22 does not extend in the radial extension of the drive gear 14.
    However, the discharge line 22 is placed at an angle with the radial direction X-X 'of the drive gear 14. The discharge line 22 extends. still out in the plane of the drive gear 14.
    Because of this oblique installation, the discharge line 22 follows the direction of the 'gearwind' more, so that an even better discharge of the oil-air mixture from the housing 10 is obtained.
    Moreover, also in a machine 1, where the drain line 22 is not placed in the radial extension of the drive gear 14 for structural and / or design reasons, the drain line 22 can make the connection to oil reservoir 15 in a different orientation or form.
    Also for structural and / or design reasons, drain 20 can be placed in front of or behind surface X-X 'of the gear. This by, for example, guiding the gear wind from the gear wheel via the housing 10 to discharge opening 20.
    The present invention is not limited in any way to the embodiments described by way of example and shown in the figures, but a transmission according to the invention and a compressor or vacuum pump provided with such a transmission can take many forms and
    B E2018 / 5037 dimensions are achieved without departing from the scope of the invention.
    权利要求:
    Claims (7)
    [1]
    Conclusions.
    1. - Transmission between drive shaft (13) and a driven shaft (9), which transmission (4) comprises a housing (10) and at least a driven gear (11) mounted on the driven shaft (9) and a drive gear ( 14) mounted on a drive shaft (13), characterized in that the housing is provided with a discharge opening (20), which discharge opening (20) is placed in the radial extension of one of the gear wheels (11, 14).
    [2]
    Transmission according to claim 1, characterized in that the discharge opening (20) is in line with the gearwind of one of the gear wheels (11, 14).
    [3]
    Transmission according to one of the preceding claims, characterized in that the drain opening (20) connects to a drain line (22).
    [4]
    Transmission according to claim 3, characterized in that the discharge line (22) extends in line with the gearwind of one of the gear wheels (11, 14).
    [5]
    Transmission according to one of the preceding claims, characterized in that the discharge opening (20) is placed in the radial extension of the largest gear (11, 14).
    [6]
    6. - Compressor provided with a compressor element (2) and a motor (3) for driving the compressor element (2),
    BE2018 / 5037 characterized in that the compressor (1) is provided with a transmission (4) according to one of the preceding claims between a drive shaft (13) of the motor (3) and a driven shaft (9) of the compressor element (2) .
    [7]
    Vacuum pump provided with a vacuum pump element and a motor (3) for driving the vacuum pump element, characterized in that the vacuum pump is provided with a transmission (4), according to one of the preceding claims 1 to 5, between a drive shaft ( 13) of the motor (3) and a driven shaft (9) of the vacuum pump element.
    类似技术:
    公开号 | 公开日 | 专利标题
    US3378104A|1968-04-16|Air-oil separators for use in gas turbine engines
    US4681189A|1987-07-21|Dry sump lubrication system for an internal combustion engine
    US6446755B1|2002-09-10|Device for lubricating a step-up/down mechanical assembly
    CN103703284B|2016-03-09|Speed changer oil hydraulic circuit
    CN102635553A|2012-08-15|Water injection type screw compressor
    US20120023939A1|2012-02-02|Turbo compoundsystem for a drive apparatus
    BE1025222B1|2018-12-13|Transmission and compressor or vacuum pump provided with such transmission
    KR20060045546A|2006-05-17|Pump for transfer case
    US10646805B2|2020-05-12|Device of a turbomachine for separating oil from an air-oil volume flow
    BE1026195A1|2019-11-05|Liquid injected compressor device
    JP6518447B2|2019-05-22|Oilless compressor
    US3121474A|1964-02-18|Zero gravity lubrication system
    JP2015137694A|2015-07-30|Hydraulic fluid circulation structure for transmission
    JP2020193584A|2020-12-03|Rotary machine
    RU138517U1|2014-03-20|GTE REDUCER COUPLING LUBRICATION UNIT
    CN113316694A|2021-08-27|Transmission device
    CN2703875Y|2005-06-08|Pressure-reducing mechanism for engine lubricating system
    US20030146052A1|2003-08-07|Oil system and a generator including such an oil system
    同族专利:
    公开号 | 公开日
    MX2019012946A|2019-12-16|
    CA3059318A1|2018-11-08|
    BE1025276B1|2019-01-07|
    AU2018262342A1|2019-11-07|
    CN110612396A|2019-12-24|
    US20200116233A1|2020-04-16|
    CN110582645B|2021-11-16|
    BE1025276A1|2019-01-03|
    JP2020518755A|2020-06-25|
    EP3619432A1|2020-03-11|
    EP3619433A1|2020-03-11|
    RU2755864C2|2021-09-22|
    CA3059302A1|2018-11-08|
    EP3619432B1|2021-05-05|
    JP2020518756A|2020-06-25|
    BE1025222A1|2018-12-06|
    RU2019139052A|2021-06-04|
    ES2880705T3|2021-11-25|
    RU2019139052A3|2021-06-04|
    MX2019012944A|2019-12-16|
    US20200072221A1|2020-03-05|
    WO2018203152A1|2018-11-08|
    CN110612396B|2021-03-26|
    AU2018262341A1|2019-11-07|
    WO2018203151A1|2018-11-08|
    EP3619433B1|2021-11-10|
    BR112019022829A2|2020-05-26|
    KR20200003856A|2020-01-10|
    RU2737573C1|2020-12-01|
    US20200063738A1|2020-02-27|
    BR112019023112A2|2020-05-26|
    KR20200004345A|2020-01-13|
    CN110582645A|2019-12-17|
    PL3619432T3|2021-11-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1983003641A1|1982-04-13|1983-10-27|Glanvall, Rune|Compressor of hermetical type|
    JPS59176491A|1983-03-25|1984-10-05|Anretsuto:Kk|Horizontal two-shaft compression pump|
    JPH094580A|1995-06-16|1997-01-07|Dia Shinku Kk|Screw vacuum pump|
    WO2000042322A1|1999-01-11|2000-07-20|E.I. Du Pont De Nemours And Company|Screw compressor|
    US4711647A|1985-05-02|1987-12-08|Barmag Aktiengesellschaft|Process and apparatus for degassing liquids, especially polymer melts and solutions|
    DE19623514C2|1996-06-13|1998-04-09|Troester Maschf Paul|Method and device for the extrusion of rubber compounds by means of a gear pump|
    JP3673743B2|2001-09-27|2005-07-20|大晃機械工業株式会社|Screw type vacuum pump|
    JP2005069163A|2003-08-27|2005-03-17|Taiko Kikai Industries Co Ltd|Air cooled dry vacuum pump|
    DE102006040027B3|2006-08-25|2008-06-26|Christian Beer|Vacuum conveyor for transport, storage and stacking of flat objects|
    US20090129956A1|2007-11-21|2009-05-21|Jean-Louis Picouet|Compressor System and Method of Lubricating the Compressor System|
    US20110016895A1|2008-05-21|2011-01-27|Carrier Corporation|Methods and Systems for Injecting Liquid Into a Screw Compressor for Noise Suppression|
    JP5777379B2|2011-04-05|2015-09-09|株式会社日立産機システム|air compressor|
    CN205506795U|2016-04-07|2016-08-24|新疆工程学院|Exhaust pollution detection device|
    CN205606795U|2016-05-12|2016-09-28|李依真|Air purifying device|
    法律状态:
    2019-01-16| FG| Patent granted|Effective date: 20181213 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201762501245P| true| 2017-05-04|2017-05-04|
    US62501245|2017-05-04|US16/610,539| US20200072221A1|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump provided with such a transmission|
    RU2019139052A| RU2755864C2|2017-05-04|2018-03-13|Oil-free compressor|
    BR112019023112-9A| BR112019023112A2|2017-05-04|2018-03-13|TRANSMISSION AND COMPRESSOR OR VACUUM PUMP WITH SUCH TRANSMISSION|
    AU2018262342A| AU2018262342A1|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump provided with such a transmission|
    KR1020197035337A| KR20200003856A|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump with this transmission|
    CA3059318A| CA3059318A1|2017-05-04|2018-03-13|Compressor or vacuum pump provided with a transmission|
    EP18717121.0A| EP3619433B1|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump provided with such a transmission|
    CN201880029622.3A| CN110582645B|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump provided with such a transmission|
    MX2019012946A| MX2019012946A|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump provided with such a transmission.|
    JP2019559823A| JP2020518756A|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump provided with such a transmission|
    PCT/IB2018/051662| WO2018203152A1|2017-05-04|2018-03-13|Transmission and compressor or vacuum pump provided with such a transmission|
    US16/671,305| US20200063738A1|2017-05-04|2019-11-01|Compressor or vacuum pump provided with a transmission|
    [返回顶部]