WO2022073411A1 - 一种电机散热装置和管道泵 - Google Patents

一种电机散热装置和管道泵 Download PDF

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Publication number
WO2022073411A1
WO2022073411A1 PCT/CN2021/118641 CN2021118641W WO2022073411A1 WO 2022073411 A1 WO2022073411 A1 WO 2022073411A1 CN 2021118641 W CN2021118641 W CN 2021118641W WO 2022073411 A1 WO2022073411 A1 WO 2022073411A1
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Prior art keywords
hole
water
cover
rear end
end cover
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PCT/CN2021/118641
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English (en)
French (fr)
Inventor
陈沁茹
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华工(江门)机电有限公司
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Publication of WO2022073411A1 publication Critical patent/WO2022073411A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the utility model relates to the field of heat dissipation equipment, in particular to a motor heat dissipation device and a pipeline pump.
  • the pipeline pump is a kind of single-suction single-stage or multi-stage centrifugal pump. Because the inlet and outlet are on the same line and the inlet and outlet diameters are the same, it is like a section of pipeline and can be installed in any position of the pipeline, so it is named pipeline pump.
  • the structural feature is that the inlet and outlet are the same and on the same straight line, which is perpendicular to the axis centerline.
  • the circuit board in the motor body of the pipeline pump is generally sealed and arranged on the stator seat or is independent of the pipeline pump as a peripheral component.
  • the circuit board is generally installed in the stator seat using glue-filled insulation sealing, which is not conducive to the heat of the circuit board.
  • the purpose of the utility model is to overcome the shortcomings of the above-mentioned traditional technologies, and to provide a motor cooling device and a pipeline pump with good heat dissipation effect of the circuit board and easy maintenance.
  • a motor cooling device including a motor body, the body of the motor body is provided with a water hole, and also includes a rear end cover with a water outlet, a water outlet pipe and a water outlet.
  • the circuit board is used to control the work of the motor body; the circuit board is arranged in the rear end cover; the water passage hole and the water outlet hole are communicated with the water outlet pipe.
  • it further includes a cylinder body, the motor body is arranged in the cylinder body, and the rear end cover is sealed and closed on the cylinder body; the body of the motor body is mounted on the rear end cover, and the motor body
  • a water passage is formed between the outer wall of the fuselage and the inner wall of the cylinder, and the water passage communicates with the water passage.
  • the output shaft of the motor body extends in a direction away from the rear end cover, the output shaft of the motor body is coaxially installed with an impeller group, and one end of the impeller group away from the rear end cover is provided with an impeller group.
  • the cover is closed with a guide vane front cover, and the guide vane front cover is provided with a water suction hole.
  • the utility model also provides a pipeline pump, which includes the motor cooling device mentioned in the utility model, and also includes a front end cover that is covered on the front end of the cylinder.
  • the front end cover is provided with a water inlet hole coaxial with the water outlet hole. communicated with the suction hole.
  • the front end cover is provided with an isolation cover, the two ends of the opening of the isolation cover are respectively connected with the inner side wall of the front end cover and the front cover plate of the guide vane, the isolation cover, the inner wall of the cylinder, the motor
  • the outer wall of the main body, the front cover of the guide vane and the radial edge of the impeller group form a water storage chamber
  • the isolation cover is provided with a return hole
  • the water storage chamber is provided with a differential pressure valve to control the opening and closing of the return hole.
  • the differential pressure valve includes a guide post installed on the front cover plate of the guide vane, one end of the guide post penetrates the return hole, the guide post is clearance fit with the return hole, and the guide post is adjacent to the return hole A shrapnel is sleeved, and the shrapnel is located in the water storage chamber and can cover the return hole.
  • the differential pressure valve includes a mounting plate fixed on the outer wall of the isolation cover, a rod body with a limiting member at the front and rear ends, a spring sleeved on the rod body, and a seal sleeved on the rod body.
  • the mounting plate is provided with a mounting hole coaxial with the return hole; the front end of the rod body penetrates the mounting hole; the rear end of the rod body is located in the water storage chamber; the sealing sheet is located between the rear end of the spring and the limiter in the water storage chamber , the sealing sheet is located in the water storage chamber and can cover the return hole; the outer diameter of the spring is larger than the diameter of the installation hole and smaller than the diameter of the return hole, the front end of the spring is in contact with the installation plate, and the limiter at the front end of the rod body is in contact with the installation plate. , there is a gap between the sealing sheet and the isolation cover.
  • the front end cover is provided with a diversion pipe, the water inlet end of the diversion pipe communicates with the water inlet hole, and the water outlet end of the diversion pipe is far away from the return hole.
  • the circuit board Compared with the motor cooling device in the prior art, by arranging the circuit board in the inner cavity of the rear end cover, water enters the water outlet pipe from the water passage hole, the circuit board has a larger cooling space, and the cooling effect is good;
  • the air in the cavity and the water in the water outlet pipe conduct heat transfer, so as to dissipate heat from the air in the inner cavity of the rear end cover, without the need to seal the circuit board, the circuit board can be inspected and repaired by removing the rear end cover, which is convenient for maintenance.
  • the pipeline pump of the utility model provides good heat dissipation effect on the circuit board, the circuit board is sealed and installed in the pipeline pump, and the integration degree is high.
  • FIG. 1 is a cross-sectional view of the pipeline pump structure of Embodiment 1.
  • FIG. 1 is a cross-sectional view of the pipeline pump structure of Embodiment 1.
  • FIG. 2 is a schematic structural diagram of the differential pressure valve of Embodiment 1.
  • FIG. 2 is a schematic structural diagram of the differential pressure valve of Embodiment 1.
  • FIG. 3 is a schematic structural diagram of the differential pressure valve of Embodiment 2.
  • FIG. 3 is a schematic structural diagram of the differential pressure valve of Embodiment 2.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a connectable connection.
  • Detachable connection, or integral connection may be mechanical connection or electrical connection; may be direct connection, or indirect connection through an intermediate medium, or internal communication between two components.
  • the specific meanings of the above terms in the present invention can be understood in specific situations.
  • front end and rear end of the present invention are defined by the order of water flow.
  • the fuselage 201 of the motor body in the present invention includes components such as rotor, stator, rotating shaft, stator seat and circuit board 202.
  • the connection method, assembly structure and working principle of each component are in the prior art, and will not be repeated here.
  • the opening of the water passage hole 2011 is opened according to the structure of the body 201.
  • the body 201 has a casing, it should be understood that the water passage hole 2011 can be provided on the casing.
  • the body 201 does not have a casing, it should be understood as the water passage hole 2011. It is arranged on the stator seat, and the opening of the water passage hole 2011 is adjusted according to the structure of the actual fuselage. It should be considered as a conventional choice under the premise of knowing the technical solution of the present invention.
  • this embodiment provides a pipeline pump, including a motor cooling device, and a front end cover 50 covering the front end of the cylinder body 10 .
  • the front end cover 50 is provided with a water inlet hole coaxial with the water outlet hole. , the water inlet hole communicates with the water absorption hole 4021.
  • the motor cooling device of this embodiment includes a cylinder body 10 and a motor body disposed in the cylinder body 10 .
  • the body 201 of the motor body is provided with a water passage hole 2011 , and also includes a rear end cover 30 that is sealed and covered at the rear end of the cylinder body 10 .
  • the rear end cover 30 is provided with a water outlet; the body 201 of the motor body is installed on the rear end cover 30, and a water passage 101 is formed between the outer wall of the body 201 of the motor body and the inner wall of the cylinder 10;
  • the water outlet pipe 301 in the cover 30 is used for connecting the water pipe and the water outlet hole; it also includes a circuit board 202 for controlling the operation of the motor body, and the circuit board 202 is arranged in the rear end cover 30 .
  • the output shaft of the motor body extends in a direction away from the rear end cover 30 , and an impeller group 401 is coaxially mounted on the output shaft of the motor body.
  • the front cover plate 402 of the guide vane is provided with a water suction hole 4021 .
  • the front end cover 50 is provided with an isolation cover 502, the two ends of the opening of the isolation cover 502 are respectively connected with the inner side wall of the front end cover 50 and the guide vane front cover 402, the isolation cover 502, the inner wall of the cylinder 10, and the outer wall of the body 201 of the motor body , the guide vane front cover 402 and the radial edge of the impeller group 401 to form a water storage chamber 101, the isolation cover 502 is provided with a return hole 5021, and the water storage chamber 101 is provided with a pressure differential valve for controlling the opening and closing of the return hole 5021 .
  • the differential pressure valve includes a guide post 601 installed on the front cover plate 402 of the guide vane. One end of the guide post 601 penetrates the return hole 5021. The guide post 601 is in clearance fit with the return hole 5021.
  • the elastic piece 602 is located in the water storage chamber 101 and can cover the flow hole 5021 .
  • the circuit board 202 drives the output shaft of the motor body to drive the impeller to rotate, and the water enters the impeller group 401 through the water inlet hole and the water suction hole 4021 in sequence, and the impeller group 401 can be It includes at least one set of impellers. There are two sets of impeller sets 401 in this embodiment. The centrifugal force generated by the impellers throws the water toward the water storage chamber 101. At the beginning, there is a lot of gas in the water storage chamber 101.
  • the front end of the pipeline pump The water is at the bottom and the rear end is at the top, and the water returns to the front cover 50 from the lower part of the water storage chamber 101 through the return hole 5021.
  • the specific gravity of the water in the water storage chamber 101 increases continuously, and the gas flows through the storage chamber 101 in turn.
  • the upper end of the water chamber 101 , the water passage hole 2011 and the water outlet pipe 301 finally overflow from the water outlet hole until the pressure in the water storage chamber 101 is greater than the pressure in the front end cover 50 , and the elastic piece 602 receives the water pressure of the water storage chamber 101 It moves along the guide post 601 to generate deformation and cover the return hole 5021, closing the return hole 5021; when the gas in the water storage chamber 101 is displaced, the water can be continuously transported.
  • the water flows through the water pipe, and the water in the water pipe and the body 201 of the motor body conduct heat transfer to take away heat.
  • the road enters the water outlet pipe 301 after passing through, and the circuit board 202 has a larger space for heat dissipation.
  • the air in the inner cavity of the rear end cover 30 and the water in the water outlet pipe 301 conduct heat transfer, so as to dissipate the air in the inner cavity of the rear end cover 30.
  • the circuit board 202 can be inspected and maintained by removing the rear end cover 30 without the need to seal the circuit board 202, which is convenient for maintenance.
  • the pipeline pump of the present invention has a good heat dissipation effect on the circuit board 202, and the circuit board 202 is sealed and installed in the pipeline pump, and the integration degree is high.
  • the pump casing Before starting the existing self-priming pump, the pump casing is filled with water (or there is water in the pump casing itself). After starting, the impeller rotates at a high speed so that the water in the impeller channel flows to the volute. The water backstop door is opened, and the air in the suction pipe enters the pump and reaches the outer edge through the impeller channel. Since the self-priming pump throws water around by centrifugal force, the inlet and outlet of the self-priming pump are not in a straight line, so it cannot be applied to a pipeline pump. The pipeline pump without self-priming ability needs to fill the pump cavity before use, otherwise the motor body will be easily burned, and the low-level water cannot be pumped.
  • This embodiment improves the package heat dissipation structure of the circuit board 202 and combines the pressure
  • the setting of the differential valve makes the pipeline pump have self-priming ability, and the pipeline pump does not need to be immersed in the liquid during use, and can absorb the liquid with a lower liquid level.
  • the front end cover 50 is provided with a diversion pipe, the water inlet end of the diversion pipe communicates with the water inlet hole, and the water outlet end of the diversion pipe is far away from the return hole 5021 .
  • the differential pressure valve In order to prevent the water flow entering from the water inlet hole from affecting the water pressure near the differential pressure valve, thereby affecting the opening and closing control of the return hole 5021 by the differential pressure valve.
  • this embodiment provides a pipeline pump, including a motor cooling device, and a front end cover 50 covering the front end of the cylinder body 10.
  • the front end cover 50 is provided with a water inlet hole coaxial with the water outlet hole.
  • the water hole communicates with the water absorption hole 4021 .
  • the motor cooling device of this embodiment includes a cylinder body 10 and a motor body disposed in the cylinder body 10 .
  • the body 201 of the motor body is provided with a water passage hole 2011 , and also includes a rear end cover 30 that is sealed and covered at the rear end of the cylinder body 10 .
  • the rear end cover 30 is provided with a water outlet; the body 201 of the motor body is installed on the rear end cover 30, and a water passage is formed between the outer wall of the body 201 of the motor body and the inner wall of the cylinder 10;
  • the water outlet pipe 301 in the 30 is used to connect the water pipe and the water outlet hole; it also includes a circuit board 202 for controlling the operation of the motor body, and the circuit board 202 is arranged in the rear end cover 30 .
  • the output shaft of the motor body extends in a direction away from the rear end cover 30 , and an impeller group 401 is coaxially mounted on the output shaft of the motor body.
  • the front cover plate 402 of the guide vane is provided with a water suction hole 4021 .
  • the front end cover 50 is provided with an isolation cover 502.
  • the two ends of the opening of the isolation cover 502 are respectively connected with the inner side wall of the front end cover 50 and the guide vane front cover 402.
  • the differential pressure valve includes a mounting plate 701 fixed on the outer wall of the isolation cover 502, a rod body 702 with limiting members 703 at the front and rear ends, a spring 704 sleeved on the rod body 702, and a sealing sheet 705 sleeved on the rod body 702; the mounting plate 701 A mounting hole 7011 coaxial with the return hole 5021 is opened; the front end
  • the difference between the structure of this embodiment and Embodiment 1 lies in the structure of the differential pressure valve.
  • the differential pressure valve of this embodiment is normally open when the water storage chamber 101 still has gas.
  • the resulting pressure difference causes the limiting member 703 in the water storage chamber 101 to move toward the return hole 5021 , and the spring 704 is compressed by the limiting member 703 until the sealing sheet 705 closes the return hole 5021 .

Abstract

本实用新型提供一种电机散热装置，包括电机本体，电机本体的机身开设有过水孔，还包括开设有出水孔的后端盖、出水管道和用于控制电机本体工作的电路板；电路板设置于后端盖内；过水孔与出水孔通过出水管道连通。本实用新型电机散热装置散热效果好，无需胶封电路板，拆卸后端盖即可对电路板进行检测和维修，检修方便。在本实用新型电机散热装置的基础上，本实用新型提供一种管道泵，对电路板散热效果好，将电路板密封安装在管道泵内，一体化程度高。

Description

一种电机散热装置和管道泵 技术领域
本实用新型涉及散热设备领域，具体地说，涉及一种电机散热装置和管道泵。
背景技术
管道泵是单吸单级或多级离心泵的一种，因其进出口在同一直线上，且进出口口径相同，仿似一段管道，可安装在管道的任何位置故取名为管道泵。结构特点为进出口相同并在同一直线上，和轴中心线成直交。管道泵的电机本体中的电路板一般密封设置在定子座或者作为外设部件独立于管道泵之外，电路板设置于定子座一般采用灌胶绝缘密封，这种密封方式不利于电路板的热量的发散，容易导致局部产生高温，电路元件容易烧坏，灌胶后的胶液与电路板难以分离，检修不便。因此，亟需一种电路板散热效果好、便于检修的电机散热装置和管道泵。
实用新型内容
本实用新型的目的在于克服上述传统技术的不足之处，提供一种电路板散热效果好、便于检修的电机散热装置和管道泵。
本实用新型的目的是通过以下技术措施来达到的：一种电机散热装置，包括电机本体，电机本体的机身开设有过水孔，还包括开设有出水孔的后端盖、出水管道和用于控制电机本体工作的电路板；电路板设置于后端盖内；过水孔与出水孔通过出水管道连通。
在本实用新型的其中一种具体实施方式中，还包括筒体，电机本体设置于筒体内，后端盖密封盖合于筒体；电机本体的机身安装于后端盖上，电机本体的机身外壁与筒体的内壁之间形成过水管路，过水管路与过水孔相通。
在本实用新型的其中一种具体实施方式中，电机本体的输出轴朝远离后端盖的方向延伸，电机本体的输出轴上同轴安装有叶轮组，叶轮组远离后端盖的一端设有盖合有导叶前盖板，导叶前盖板开设有吸水孔。
本实用新型还提供一种管道泵，包括本实用新型提及的电机散热装置，还包括盖合于筒体前端的前端盖，前端盖开设有与出水孔同轴的进水孔，进水孔与吸水孔相通。
在本实用新型的其中一种具体实施方式中，前端盖内设有隔离罩，隔离罩开口处的两端分别与前端盖内侧壁和导叶前盖板连接，隔离罩、筒体内壁、电机本体的机身外壁、导叶前盖板以及叶轮组的径向边缘围合成储水腔室，隔离罩开设有回流孔，储水腔室内设有控制回流孔开闭的压差阀。
在本实用新型的其中一种具体实施方式中，压差阀包括安装于导叶前盖板的导柱，导柱的一端贯穿回流孔，导柱与回流孔间隙配合，导柱临近回流孔处套设弹片，弹片位于储水腔 室内且可盖合回流孔。
在本实用新型的其中一种具体实施方式中，压差阀包括固定于隔离罩外壁的安装板、前后两端分别设置有限位件的杆体、套设于杆体的弹簧和套设于杆体的密封片；安装板开设有与回流孔同轴的安装孔；杆体的前端贯穿安装孔；杆体的后端位于储水腔室内；密封片位于弹簧的后端与储水腔室内的限位件之间，密封片位于储水腔室内且可盖合回流孔；弹簧的外径大于安装孔的孔径且小于回流孔的孔径，弹簧的前端与安装板相抵，杆体前端的限位件与安装板相抵时，密封片与隔离罩之间留有间隙。
在本实用新型的其中一种具体实施方式中，前端盖内设有导流管道，导流管道的进水端与进水孔相通，导流的管道的出水端远离回流孔。
与现有技术的电机散热装置相比，通过将电路板设置在后端盖内腔中，水从过水孔进入出水管道，电路板具有更大的散热空间，散热效果好；后端盖内腔中的空气与出水管道中的水发生热传递，从而对后端盖内腔的空气进行散热，无需胶封电路板，拆卸后端盖即可对电路板进行检测和维修，检修方便。本实用新型的管道泵提供对电路板散热效果好，将电路板密封安装在管道泵内，一体化程度高。
附图说明
图1是实施例1的管道泵结构剖视图。
图2是实施例1的压差阀结构示意图。
图3是实施例2的压差阀结构示意图。
其中：10、筒体；101、储水腔室；201、机身；2011、过水孔；202、电路板；30、后端盖；301、出水管道；401、叶轮组；402、导叶前盖板；4021、吸水孔；50、前端盖；501、导流端盖；502、隔离罩；5021、回流孔；601、导柱；602、弹片；701、安装板；7011、安装孔；702、杆体；703、限位件；704、弹簧；705、密封片。
具体实施方式
下面详细描述本实用新型的具体实施方式，具体实施方式的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本实用新型，而不能理解为对本实用新型的限制。
在本实用新型的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本 实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。此外，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本实用新型的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本实用新型的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本实用新型中的具体含义。
本实用新型的“前端”、“后端”是水的流经先后顺序定义。
本实用新型中的电机本体的机身201包括转子、定子、转轴、定子座以及电路板202等部件，各部件的连接方式、装配结构以及工作原理为现有技术，在此不再赘述。过水孔2011的开设根据机身201的结构开设，当机身201有外壳时，应当理解为过水孔2011可以设置在外壳上，当机身201没有外壳时，应当理解为过水孔2011设置在定子座上，根据实际机身的结构对过水孔2011的开设进行调整，在获知本实用新型技术方案的前提下应当认为常规选择。
实施例1
如图1和2所示，本实施例提供一种管道泵，包括电机散热装置，还包括盖合于筒体10前端的前端盖50，前端盖50开设有与出水孔同轴的进水孔，进水孔与吸水孔4021相通。本实施例的电机散热装置包括筒体10和设置于筒体10内的电机本体，电机本体的机身201开设有过水孔2011，还包括密封盖合于筒体10后端的后端盖30，后端盖30开设出水孔；电机本体的机身201安装于后端盖30上，电机本体的机身201外壁与筒体10的内壁之间形成过水管路101；还包括设置在后端盖30内的出水管道301，出水管道301用于连通过水管路和出水孔；还包括控制电机本体工作的电路板202，电路板202设置于后端盖30内。电机本体的输出轴朝远离后端盖30的方向延伸，电机本体的输出轴上同轴安装有叶轮组401，叶轮组401远离后端盖30的一端设有盖合有导叶前盖板402，导叶前盖板402开设有吸水孔4021。前端盖50内设有隔离罩502，隔离罩502开口处的两端分别与前端盖50内侧壁和导叶前盖板402连接，隔离罩502、筒体10内壁、电机本体的机身201外壁、导叶前盖板402以及叶轮组401的径向边缘围合成储水腔室101，隔离罩502开设有回流孔5021，储水腔室101内设有控制回流孔5021开闭的压差阀。压差阀包括安装于导叶前盖板402的导柱601，导柱601的一端贯穿回流孔5021，导柱601与回流孔5021间隙配合，导柱601临近回流孔5021处套 设弹片602，弹片602位于储水腔室101内且可盖合回流孔5021。
工作原理：将管道泵放置于水(可以为其他流体)中，电路板202驱动电机本体的输出轴带动叶轮转动，将水依次经进水孔、吸水孔4021进入叶轮组401，叶轮组401可以包括至少一组叶轮，本实施例的叶轮组401有两组，叶轮产生的离心力将水甩向储水腔室101，开始时储水腔室101中有较多气体，此时管道泵的前端在下，后端在上，水从储水腔室101下部经回流孔5021回到前端盖50内，电机本体持续工作过程中，储水腔室101内水的比重不断增大，气体依次经储水腔室101上端、过水孔2011、出水管道301，最后从出水孔溢出，直到储水腔室101中的压强大于前端盖50内的压强，弹片602收到储水腔室101的水压沿导柱601运动，产生形变并盖合于回流孔5021，关闭回流孔5021；当储水腔室101中的气体排挤既可以实现对水的持续输送。
本实施例的电机散热装置水流经过水管道，过水管路的水与电机本体的机身201发生热传递带走热量，通过将电路板202设置在后端盖30内腔中，水从过水管路经过后进入出水管道301，电路板202具有更大的散热空间，后端盖30内腔中的空气与出水管道301中的水发生热传递，从而对后端盖30内腔的空气进行散热，无需胶封电路板202，拆卸后端盖30即可对电路板202进行检测和维修，检修方便。本实用新型的管道泵对电路板202的散热效果好，将电路板202密封安装在管道泵内，一体化程度高。
现有的自吸泵启动前先在泵壳内灌满水(或泵壳内自身存有水)，启动后叶轮高速旋转使叶轮槽道中的水流向涡壳，这时入口形成真空，使进水逆止门打开，吸入管内的空气进入泵内，并经叶轮槽道到达外缘。由于自吸泵是通过离心力将水甩向四周，所以自吸泵的进出口不在一条直线上，无法适用于管道泵。而没有自吸能力的管道泵在使用前需要将泵腔灌满，否则容易烧坏电机本体，且无法抽取低液位水，本实施例通过改善电路板202的封装散热结构的同时，结合压差阀的设置，使管道泵具有自吸能力，使用时无需将管道泵浸没在液体中，可以吸取较低液位的液体。
前端盖50内设有导流管道，导流管道的进水端与进水孔相通，导流的管道的出水端远离回流孔5021。为避免由进水孔处进入的水流对压差阀附近的水压造成影响，从而影响压差阀对回流孔5021的开闭控制。
实施例2
如图3所示，本实施例提供一种管道泵，包括电机散热装置，还包括盖合于筒体10前端的前端盖50，前端盖50开设有与出水孔同轴的进水孔，进水孔与吸水孔4021相通。本实施例的电机散热装置包括筒体10和设置于筒体10内的电机本体，电机本体的机身201开设有过水孔2011，还包括密封盖合于筒体10后端的后端盖30，后端盖30开设出水孔；电机本体 的机身201安装于后端盖30上，电机本体的机身201外壁与筒体10的内壁之间形成过水管路；还包括设置在后端盖30内的出水管道301，出水管道301用于连通过水管路和出水孔；还包括控制电机本体工作的电路板202，电路板202设置于后端盖30内。电机本体的输出轴朝远离后端盖30的方向延伸，电机本体的输出轴上同轴安装有叶轮组401，叶轮组401远离后端盖30的一端设有盖合有导叶前盖板402，导叶前盖板402开设有吸水孔4021。前端盖50内设有隔离罩502，隔离罩502开口处的两端分别与前端盖50内侧壁和导叶前盖板402连接，隔离罩502、筒体10内壁、电机本体的机身201外壁、导叶前盖板402以及叶轮组401的径向边缘围合成储水腔室101，隔离罩502开设有回流孔5021，储水腔室101内设有控制回流孔5021开闭的压差阀压差阀包括固定于隔离罩502外壁的安装板701、前后两端分别设置有限位件703的杆体702、套设于杆体702的弹簧704和套设于杆体702的密封片705；安装板701开设有与回流孔5021同轴的安装孔7011；杆体702的前端贯穿安装孔7011；杆体702的后端位于储水腔室101内；密封片705位于弹簧704的后端与储水腔室101内的限位件703之间，密封片705位于储水腔室101内且可盖合回流孔5021；弹簧704的外径大于安装孔7011的孔径且小于回流孔5021的孔径，弹簧704的前端与安装板701相抵，杆体702前端的限位件703与安装板701相抵时，密封片705与隔离罩502之间留有间隙。
本实施例的结构与实施例1区别在于压差阀的结构，本实施例的压差阀在储水腔室101还有气体的时候属于常开状态，当储水腔室101的水压大于前端盖50内的水压时，产生的压差使储水腔室101内的限位件703朝回流孔5021运动，弹簧704被限位件703压缩，直至密封片705封闭回流孔5021。
对于本领域技术人员而言，显然本实用新型不限于上述示范性实施例的细节，而且在不背离本实用新型的精神或基本特征的情况下，能够以其他的具体形式实现本实用新型。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本实用新型的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本实用新型内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起见，本领域技术人员应当将说明书作为一个整体，各实施例中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。

Claims (8)

  1. 一种电机散热装置，包括电机本体，其特征在于，所述电机本体的机身开设有过水孔，还包括开设有出水孔的后端盖、出水管道和用于控制所述电机本体工作的电路板；所述电路板设置于所述后端盖内；所述过水孔与所述出水孔通过所述出水管道连通。
  2. 根据权利要求1所述的电机散热装置，其特征在于，还包括筒体，所述电机本体设置于所述筒体内，所述后端盖密封盖合于所述筒体；所述电机本体的机身安装于后端盖上，所述电机本体的机身外壁与所述筒体的内壁之间形成过水管路，所述过水管路与所述过水孔相通。
  3. 根据权利要求2所述的电机散热装置，其特征在于，所述电机本体的输出轴朝远离所述后端盖的方向延伸，所述电机本体的输出轴上同轴安装有叶轮组，所述叶轮组远离所述后端盖的一端设有盖合有导叶前盖板，所述导叶前盖板开设有吸水孔。
  4. 一种管道泵，其特征在于，包括如权利要求3所述的电机散热装置，还包括盖合于所述筒体前端的前端盖，所述前端盖开设有与出水孔同轴的进水孔，所述进水孔与所述吸水孔相通。
  5. 根据权利要求4所述的管道泵，其特征在于，所述前端盖内设有隔离罩，所述隔离罩开口处的两端分别与所述前端盖内侧壁和所述导叶前盖板连接，所述隔离罩、筒体内壁、电机本体的机身外壁、导叶前盖板以及叶轮组的径向边缘围合成储水腔室，所述隔离罩开设有回流孔，储水腔室内设有控制所述回流孔开闭的压差阀。
  6. 根据权利要求5所述的管道泵，其特征在于，所述压差阀包括安装于所述导叶前盖板的导柱，所述导柱的一端贯穿所述回流孔，所述导柱与所述回流孔间隙配合，所述导柱临近所述回流孔处套设弹片，所述弹片位于所述储水腔室内且可盖合所述回流孔。
  7. 根据权利要求5所述的管道泵，其特征在于，所述压差阀包括固定于所述隔离罩外壁的安装板、前后两端分别设置有限位件的杆体、套设于所述杆体的弹簧和套设于所述杆体的密封片；所述安装板开设有与所述回流孔同轴的安装孔；所述杆体的前端贯穿所述安装孔；所述杆体的后端位于所述储水腔室内；所述密封片位于所述弹簧的后端与所述储水腔室内的限位件之间，所述密封片位于所述储水腔室内且可盖合所述回流孔；所述弹簧的外径大于所述安装孔的孔径且小于所述回流孔的孔径，所述弹簧的前端与所述安装板相抵，所述杆体前端的限位件与所述安装板相抵时，所述密封片与所述隔离罩之间留有间隙。
  8. 根据权利要求7所述的管道泵，其特征在于，所述前端盖内设有导流管道，所述导流管道的进水端与所述进水孔相通，所述导流的管道的出水端远离所述回流孔。
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