WO2020156089A1 - 一种具有压力补偿功能的深水水泵 - Google Patents

一种具有压力补偿功能的深水水泵 Download PDF

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Publication number
WO2020156089A1
WO2020156089A1 PCT/CN2020/071240 CN2020071240W WO2020156089A1 WO 2020156089 A1 WO2020156089 A1 WO 2020156089A1 CN 2020071240 W CN2020071240 W CN 2020071240W WO 2020156089 A1 WO2020156089 A1 WO 2020156089A1
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Prior art keywords
pressure compensation
oil
pump
bearing
cavity
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PCT/CN2020/071240
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English (en)
French (fr)
Inventor
李俊
毛桂庭
李满红
程阳锐
王建华
唐红平
彭建平
刘禹维
刘成军
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长沙矿冶研究院有限责任公司
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Publication of WO2020156089A1 publication Critical patent/WO2020156089A1/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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/04—Units comprising pumps and their driving means the pump being fluid 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
    • F04D29/007—Details, component parts, or accessories especially adapted for liquid 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • 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
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps
    • F04D29/108—Shaft sealings especially adapted for liquid pumps the sealing fluid being other than the working liquid or being the working liquid treated

Definitions

  • the invention belongs to the technical field of deep water pumping equipment, and is specifically a deep water pump with a pressure compensation function.
  • water pumps are widely used.
  • electric motors are generally used as driving power in shallow water, and the impeller shaft is fixed on the water pump body through rolling bearings, and the working water depth can reach several hundred meters.
  • the water depth can reach several kilometers.
  • the existing ordinary water pump is difficult to adapt to the deep-sea environment as deep as thousands of meters. It needs to overcome the corrosion of seawater and the influence of factors such as deep-sea high-pressure environment, especially the use of When bearing, it is difficult to lubricate and seal.
  • the hydraulic motor drives the water pump, and its structural sealing, lubrication and other problems (especially the oil leakage problem at the output shaft position) need to be solved, and there is no better solution at present.
  • the purpose of the present invention is to provide a deep water pump with pressure compensation function, so as to solve the above problems.
  • the present invention discloses a deep water pump with pressure compensation function, including a pump body, a hydraulic motor, a pump shaft, and an impeller mounted on the pump shaft.
  • the hydraulic motor is mounted on the pump body, and the pump
  • the shaft is installed in the pump body and driven by the hydraulic motor, the pump body is provided with a cavity structure, the cavity structure is connected with a pressure compensation system, the pump shaft passes through the cavity structure and is connected to The cavity structure is sealed and connected, the pump shaft is supported and rotated by a lubricating bearing arranged in the cavity structure, and the pressure compensation system controls the pressure in the cavity structure to be greater than the water pressure outside the cavity structure.
  • the cavity structure is an oil cavity provided with lubricating oil, and the oil cavity is connected with the pressure compensation system, and the pressure compensation system controls the oil pressure in the oil cavity to be greater than that outside the oil cavity. Water pressure.
  • the pressure compensation system includes a pressure compensation oil pipe and a pressure compensation device, one end of the pressure compensation oil pipe is in communication with the oil chamber, and the other end is in communication with the pressure compensation device.
  • oil pressure in the oil cavity is greater than the water pressure outside the oil cavity by a value of 0.1 bar-1.0 bar.
  • the hydraulic motor is installed on the end surface of one end of the oil cavity, and the end of the hydraulic motor with the output shaft is located in the oil cavity.
  • the lubricating bearing includes a bearing sleeve and a bearing shell sleeved with each other, the bearing shell is fixedly connected to the inner wall of the oil cavity, the bearing shell is pivotally connected to the pump shaft, and the bearing shell is provided with communication Oil through holes in the oil chambers on both sides.
  • the lubricating bearing includes a first lubricating bearing and a second lubricating bearing sleeved with the pump shaft, and the first lubricating bearing and the second lubricating bearing are used together to reduce the axial displacement of the pump shaft and Radial displacement.
  • the other end of the oil cavity is provided with a supporting flange, the supporting flange is arranged in the water inlet cavity of the pump body, and one end of the supporting flange extends toward the impeller and passes through an end cover The other end is fixedly connected with the inner wall of the water inlet cavity, the first lubricating bearing is arranged in the supporting flange, and the part of the pump shaft extending from the end cover is sleeved with a mechanical seal.
  • one end of the oil cavity has a split structure including a pump body flange and an adapter sleeve, the hydraulic motor is mounted on the adapter sleeve, and the bearing sleeve of the second lubricating bearing passes through a
  • the axial locking mechanism is limited on one side of the shoulder of the pump shaft.
  • One end of the bearing shell of the second lubrication bearing is connected between the flange of the pump body and the adapter sleeve, and the other end is clamped on the shaft.
  • the pump body is provided with guide vanes at the water outlet of the water pump.
  • the present invention not only solves the problem of bearing lubrication and sealing when the water pump rotates at high speed through the oil pressure compensation device, at the same time, the oil pressure compensation device can balance the internal and external pressure of the lubricating oil cavity of the bearing, avoiding deep water high pressure on the lubricating oil cavity Destruction.
  • the present invention particularly reduces the axial and radial forces on the extension shaft of the hydraulic motor, so that the hydraulic motor can only bear torque, thereby protecting the hydraulic motor and prolonging the service life of the hydraulic motor.
  • the present invention uses the oil pressure compensation device to make the pressure in the oil cavity slightly greater than the external deep water pressure, so as to prevent the corrosive seawater from entering the oil cavity, affecting the lubricating performance of the lubricating oil or corroding the pump shaft.
  • the present invention also provides a guarantee for the axial seal of the end of the output shaft of the hydraulic motor in case of failure.
  • Fig. 1 is a schematic structural diagram of a deep water pump with pressure compensation function disclosed in a preferred embodiment of the present invention.
  • the present invention discloses a deep water pump with pressure compensation function, including a pump body 1, a hydraulic motor 2, a pump shaft 3 and an impeller 4 mounted on the pump shaft 3.
  • the hydraulic motor 2 is mounted on the pump body 1, the pump shaft 3 is installed in the pump body 1 and driven by the hydraulic motor 2.
  • the output shaft of the hydraulic motor 2 and the pump shaft 3 are connected by a spline coupling 21, and the pump body 1 is provided with a pressure compensation
  • the cavity structure of the system is an oil cavity 5, and the pump shaft 3 passes through the oil cavity 5 and is pivotally connected to the oil cavity 5 in a sealing manner to prevent deep water outside the oil cavity 5 from entering.
  • the lubrication bearing in the cavity 5 supports rotation.
  • the pressure compensation of the oil chamber 5 is realized by the pressure compensation oil pipe 6 and the pressure compensation device 7 of the pressure compensation system.
  • One end of the pressure compensation oil pipe 6 is connected with the oil chamber 5, and the other end is connected with the pressure compensation device 7. Connected.
  • the pressure compensation device 7 not only solves the problem of lubrication and sealing of the bearing when the water pump rotates at high speed, at the same time, through the oil pressure compensation device, the pressure inside and outside the lubricating oil cavity 5 of the bearing can be balanced, avoiding the damage to the lubricating oil cavity 5 by deep water high pressure
  • the pressure compensator can be used to compensate the pressure, and when the volume of the oil cavity 5 of the pump is small, the skin structure can also be adopted.
  • the pressure compensation device 7 is configured to keep the oil pressure in the oil chamber 5 greater than the water pressure outside the oil chamber 5, thereby forming a tendency for the hydraulic oil in the oil chamber 5 to flow outwards and isolating the external seawater. Therefore, it prevents the corrosive seawater from entering the oil cavity 5, affecting the lubricating performance of the lubricating oil or corroding the pump shaft 3.
  • the oil pressure in the oil cavity 5 cannot be too much higher than the external water pressure, otherwise it will cause serious Hydraulic oil leaks.
  • the oil pressure in the oil chamber 5 is greater than the water pressure outside the oil chamber 5 by a value of 0.1 bar-1.0 bar, which not only prevents the entry of external sea water, but also avoids the hydraulic oil The problem of multiple leaks.
  • the axial seal at the end of the output shaft of the hydraulic motor 2 fails after a period of use, and the hydraulic oil leaks, which in turn causes the hydraulic motor 2 to be damaged.
  • the hydraulic motor 2 is installed on the end face of one end of the oil chamber 5, and the hydraulic motor 2 The end with the output shaft is located in the oil cavity 5.
  • the hydraulic oil of the hydraulic motor 2 can communicate with the oil cavity 5. Due to the sealing structure of the oil cavity 5 and the pressure compensation function, it can ensure Both the hydraulic motor 2 and the water pump can work normally.
  • the number of lubricating bearings is at least two, including a first lubricating bearing 8 and a second lubricating bearing 9.
  • the first lubricating bearing 8 and the second lubricating bearing 9 are used together to reduce the axial displacement of the pump shaft 3. , Thereby reducing the axial force of the hydraulic motor 2 extending out of the shaft, so that the hydraulic motor 2 can only bear the torque as much as possible, thereby protecting the hydraulic motor 2 and prolonging the service life of the hydraulic motor 2.
  • the first lubricating bearing 8 and the second lubricating bearing 9 both include a bearing sleeve 10 and a bearing bush 11 sleeved with each other.
  • the bearing sleeve 10 is generally made of stainless steel 304 or 316L, and the bearing bush 11 is generally made of wear-resistant material, such as tin. Bronze etc.
  • the bearing shell 11 is fixedly connected to the inner wall of the oil cavity 5, and the bearing sleeve 10 is pivotally connected to the pump shaft 3, thereby supporting the rotational movement of the pump shaft 3.
  • the bearing shell 11 is provided with a passage connecting the oil cavities 5 on both sides thereof
  • the oil hole 19 allows the lubricating oil on both sides of the bearing bush 11 to pass smoothly, so that the lubricating oil can cover and lubricate the first lubricated bearing 8 and the second lubricated bearing 9 completely.
  • the other end of the oil cavity 5 is provided with a supporting flange 12, the supporting flange 12 is arranged in the water inlet cavity 13 of the pump body 1, and one end of the supporting flange 12 is connected to the inner wall of the water inlet cavity 13
  • the supporting flange 12 extends toward the impeller 4, and the first lubricating bearing 8 is arranged in the supporting flange 12, that is, close to the end of the other end of the oil cavity 5. Therefore, the pivotal position of the pump shaft 3 and the first lubricating bearing 8 is closer to the impeller 4, thereby reducing the deflection or vibration of the pump shaft 3 when the impeller 4 rotates at a high speed.
  • the other end of the oil cavity 5 is sealed by an end cover 14, the part of the pump shaft 3 extending out of the end cover 14 is sleeved with a mechanical seal 15, and one end of the oil cavity 5 includes a pump body flange 16 and an adapter sleeve 17.
  • the hydraulic motor 2 is installed on the adapter sleeve 17 and sealed by the O-ring 20.
  • the bearing sleeve 10 of the second lubricating bearing 9 is restricted to one side of the shoulder 23 of the pump shaft 3 by an axial locking mechanism 22, and one end of the bearing shell 11 of the second lubricating bearing 9 is fastened to the pump body by a connecting bolt.
  • the other end is clamped in the annular limit groove 24 of the bearing sleeve 10 of the second lubricating bearing 9, wherein the axial locking mechanism 22 may be a threaded axial
  • the axial locking mechanism 22 may be a threaded axial
  • other mechanisms or parts that limit the axial displacement of the bearing sleeve 10 of the second lubricating bearing 9 can also be selected.
  • the bearing shell 11 of the second lubricating bearing 9 is divided into two, respectively, from the bearing sleeve 10 of the second lubricating bearing 9 The two sides are clamped into the annular limit groove 24.
  • the bearing shell 11 of the second lubricating bearing 9 can also play the role of axial limit, thereby reducing the hydraulic motor 2 protruding from the shaft.
  • the axial force makes the hydraulic motor 2 only bear torque as much as possible, thereby protecting the hydraulic motor 2 and prolonging the service life of the hydraulic motor 2.
  • a bearing support point of the pump shaft 3 can be provided at the same time, and the stability of the pump shaft 3 under high-speed rotation can be improved.
  • the pump shaft 3 is provided with a guide at the water outlet position of the pump body 1.
  • the blade 18, during normal operation, the rotation of the hydraulic motor 2 drives the rotation of the pump shaft 3.
  • the pump shaft 3 is supported by a plurality of sliding bearings, and the rotation stability is good. Further, the rotation of the pump shaft 3 drives the rotation of the impeller 4 to transport water from the water inlet cavity 13 through the guide vanes 18.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

一种具有压力补偿功能的深水水泵，包括泵体（1）、液压马达（2）、泵轴（3）和安装于泵轴（3）上的叶轮（4），液压马达（2）安装于泵体（1）上，泵轴（3）安装于泵体（1）内且通过液压马达（2）驱动，泵体（1）上设置有一带压力补偿的油腔（5），泵轴（3）穿过油腔（5）且与油腔（5）密封枢接，泵轴（3）通过设置在油腔（5）内的润滑轴承（8、9）支撑旋转。通过油压补偿装置不仅解决了水泵高速转动时轴承的润滑和密封问题，同时，通过油压补偿装置，能够使轴承的润滑油腔内外压力平衡，避免了深水高压对润滑油腔的破坏。

Description

一种具有压力补偿功能的深水水泵 技术领域
本发明属于深水泵送设备技术领域，具体为一种具有压力补偿功能的深水水泵。
背景技术
水泵作为一种流体输送装置，使用非常广泛。目前浅水中一般采用电动机作为驱动动力，其叶轮轴通过滚动轴承固定在水泵机体上，作业水深能达到几百米。但是，在深海作业工程设备中，水深达到几千米深，现有普通水泵很难适应深达数千米的深海环境，它需要克服海水的腐蚀以及深海高压环境等因素的影响，尤其是采用轴承时，其润滑和密封比较困难。同时，液压马达驱动水泵，其结构密封、润滑等问题(尤其输出轴位置漏油问题)都需解决，目前还未见较好的解决方案。
发明内容
本发明目的在于提供一种具有压力补偿功能的深水水泵，从而解决上述问题。
为实现上述目的，本发明公开了一种具有压力补偿功能的深水水泵，包括泵体、液压马达、泵轴和安装于泵轴上的叶轮，所述液压马达安装于泵体上，所述泵轴安装于所述泵体内且通过所述液压马达驱动，所述泵体上设置有一容腔结构，所述容腔结构连接有一压力补偿系统，所述泵轴穿过所述容腔结构且与所述容腔结构密封连接，该泵轴通过设置在所述容腔结构内的润滑轴承支撑旋转，所述压力补偿系统控制所述容腔结构内的压力大于容腔结构外的水压压力。
进一步的，所述容腔结构为一内设有润滑油的油腔，该油腔与所述压力补偿系统连接，所述压力补偿系统控制所述油腔内的油压压力大于油腔外的水压压力。
进一步的，所述压力补偿系统包括压力补偿油管和压力补偿装置，所述压力补偿油管的一端与所述油腔连通，另一端与所述压力补偿装置连通。
进一步的，所述油腔内的油压压力大于油腔外的水压压力的值为0.1bar-1.0bar。
进一步的，所述液压马达安装在所述油腔一端的端面上，且该液压马达带有输出轴的端部位于所述油腔内。
进一步的，所述润滑轴承包括相互套接的轴承套和轴瓦，所述轴瓦与所述油腔的内壁固接，所述轴承套与所述泵轴枢接，所述轴瓦上设置有连通其两侧油腔的通油孔。
进一步的，所述润滑轴承包括与所述泵轴套接的第一润滑轴承和第二润滑轴承，所述第一润滑轴承和第二润滑轴承并用设置以减少所述泵轴的轴向位移和径向位移。
进一步的，所述油腔的另一端设置有一个支撑法兰，所述支撑法兰设置在所述泵体的进水腔内，且该支撑法兰的一端向所述叶轮延伸且通过一端盖密封，另一端与所述进水腔的内壁固接，所述第一润滑轴承设置在所述支撑法兰内，所述泵轴伸出所述端盖的部分套接有机械密封。
进一步的，所述油腔的一端为包括泵体凸缘和转接套筒的分体结构，所述液压马达安装于所述转接套筒上，所述第二润滑轴承的轴承套通过一轴向锁止机构限位在泵轴的轴肩的一侧，所述第二润滑轴承的轴瓦的一端密封连接于所述泵体凸缘和转接套筒之间，另一端卡接在所述第二润滑轴承的轴承套的环形限位凹槽中。
进一步的，所述泵体位于所述水泵的出水口设置有导叶。
与现有技术相比，本发明的优点在于：
1、本发明通过油压补偿装置不仅解决了水泵高速转动时轴承的润滑和密封问题，同时，通过油压补偿装置，能够使轴承的润滑油腔内外压力平衡，避免了深水高压对润滑油腔的破坏。
2、本发明通过多个轴承并列设置，尤其减少了液压马达伸出轴的轴向和径向受力，使液压马达只承受扭矩，进而保护了液压马达，延长了液压马达的使用寿命。
3、本发明通过油压补偿装置使油腔内的压力略大于外部深水水压，从而避免带腐蚀作用的海水进入油腔，影响润滑油的润滑性能或者腐蚀泵轴。
4、本发明通过将液压马达输出轴的端部设置到油腔内，同时还为液压马达输出轴端部轴向密封万一失效情况下提供了保障。
下面将参照附图，对本发明作进一步详细的说明。
附图说明
构成本申请的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是本发明优选实施例公开的具有压力补偿功能的深水水泵的结构示意图。
图例说明：
1、泵体；2、液压马达；3、泵轴；4、叶轮；5、油腔；6、压力补偿油管；7、压力补偿装置；8、第一润滑轴承；9、第二润滑轴承；10、轴承套；11、轴瓦；12、支撑法兰；13、进水腔；14、端盖；15、机械密封；16、泵体凸缘；17、转接套筒；18、导叶；19、通油孔；20、0型密封圈；21、花键联轴器；22、轴向锁止机构；23、轴肩；24、环形限位凹槽。
具体实施方式
以下结合附图对本发明的实施例进行详细说明，但是本发明可以由权利要求限定和覆盖 的多种不同方式实施。
如图1所示，本发明公开了一种具有压力补偿功能的深水水泵，包括泵体1、液压马达2、泵轴3和安装于泵轴3上的叶轮4，液压马达2安装于泵体1上，泵轴3安装于泵体1内且通过液压马达2驱动，具体的，液压马达2的输出轴和泵轴3通过花键联轴器21连接，泵体1上设置有一带压力补偿系统的容腔结构。在本实施例中，容腔结构为一油腔5，泵轴3穿过油腔5，且与油腔5密封枢接从而防止油腔5外的深水进入，该泵轴3通过设置在油腔5内的润滑轴承支撑旋转。在本实施例中，油腔5的压力补偿是通过压力补偿系统的压力补偿油管6和压力补偿装置7来实现的，压力补偿油管6的一端与油腔5连通，另一端与压力补偿装置7连通。通过压力补偿装置7不仅解决了水泵高速转动时轴承的润滑和密封问题，同时，通过油压补偿装置，能够使轴承的润滑油腔5内外压力平衡，避免了深水高压对润滑油腔5的破坏，当水泵的油腔5体积较大时，可采用压力补偿器补偿压力，当泵的油腔5体积较小时，也可采用皮瓤结构。
在本实施例中，压力补偿装置7设置为保持油腔5内的油压压力大于油腔5外的水压压力，从而形成油腔5内的液压油向外流动的趋势，形成隔离外界海水的效果，进而避免带腐蚀作用的海水进入油腔5，影响润滑油的润滑性能或者腐蚀泵轴3，当然油腔5内的油压压力不能高于外界水压太多，否则会造成严重的液压油泄露，具体设置时，油腔5内的油压压力大于油腔5外的水压压力的值为0.1bar-1.0bar，既防止了外界海水等的进入，同时也避免了液压油过多泄露的问题。
同时，液压马达2输出轴端部轴向密封在使用一段时间后存在失效、液压油泄露，进而导致液压马达2损坏的情况，液压马达2安装在油腔5一端的端面上，且该液压马达2带有输出轴的端部位于油腔5内，当轴向密封失效时，液压马达2的液压油可与油腔5互通，由于油腔5的密封结构且带有压力补偿功能，可保证液压马达2和水泵均能正常工作。
在本实施例中，润滑轴承的数量至少为两个，包括第一润滑轴承8和第二润滑轴承9，第一润滑轴承8和第二润滑轴承9并用设置以减少泵轴3的轴向位移，从而减少了液压马达2伸出轴的轴向受力，使液压马达2尽可能只承受扭矩，进而保护了液压马达2，延长了液压马达2的使用寿命。具体的，第一润滑轴承8、第二润滑轴承9均包括相互套接的轴承套10和轴瓦11，轴承套10一般由不锈钢材料304或316L构成，轴瓦11一般由耐磨材料构成，如锡青铜等。轴瓦11与油腔5的内壁固接，轴承套10与泵轴3枢接，从而支撑泵轴3的旋转运动；在本实施例中，轴瓦11上设置有连通其两侧油腔5的通油孔19，从而轴瓦11两侧的润滑油能顺利通过，从而使润滑油能对第一润滑轴承8、第二润滑轴承9全面覆盖润滑。
在本实施例中，油腔5的另一端设置有一个支撑法兰12，支撑法兰12设置在泵体1的 进水腔13内，该支撑法兰12的一端与进水腔13的内壁固接，且该支撑法兰12向叶轮4延伸，该第一润滑轴承8设置在支撑法兰12内，即靠近油腔5的另一端的端部。从而泵轴3与第一润滑轴承8的枢接位置更加靠近叶轮4，进而减少叶轮4在高速旋转时泵轴3的偏摆或者震动。且该油腔5的另一端通过一端盖14密封，泵轴3伸出端盖14的部分套接有机械密封15，而油腔5的一端为包括泵体凸缘16和转接套筒17的分体结构，液压马达2安装于转接套筒17上，通过0型密封圈20密封。第二润滑轴承9的轴承套10通过一轴向锁止机构22限位在泵轴3的轴肩23的一侧，第二润滑轴承9的轴瓦11的一端通过连接螺栓紧固在泵体凸缘16和转接套筒17之间，另一端卡接在第二润滑轴承9的轴承套10的环形限位凹槽24中，其中，轴向锁止机构22可选为带螺纹的轴向锁紧螺母，也可以选用其他起到限制第二润滑轴承9的轴承套10发生轴向位移的机构或零件。为了便于第二润滑轴承9的轴瓦11装配卡接到环形限位凹槽24中，具体设置时，第二润滑轴承9的轴瓦11一分为二，分别从第二润滑轴承9的轴承套10两侧卡入到环形限位凹槽24中，若泵轴3左右滑动，则第二润滑轴承9的轴瓦11还能够起到轴向限位的作用，从而减少了液压马达2伸出轴的轴向受力，使液压马达2尽可能只承受扭矩，进而保护了液压马达2，延长了液压马达2的使用寿命。
为了提高水泵的工作效率，同时可提供一个泵轴3的轴承支撑点、提高泵轴3高速转动下的稳定性，在本实施例中，泵轴3位于泵体1的出水口位置设置有导叶18，正常工作时，液压马达2转动带动泵轴3转动，泵轴3在多个滑动轴承的支撑下，转动的稳定性好。进一步，泵轴3的转动带动叶轮4的转动，将水从进水腔13通过导叶18输送出去。
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种具有压力补偿功能的深水水泵，包括泵体(1)、液压马达(2)、泵轴(3)和安装于泵轴(3)上的叶轮(4)，所述液压马达(2)安装于泵体(1)上，所述泵轴(3)安装于所述泵体(1)内且通过所述液压马达(2)驱动，其特征在于，所述泵体(1)上设置有一容腔结构，所述容腔结构连接有一压力补偿系统，所述泵轴(3)穿过所述容腔结构且与所述容腔结构密封连接，该泵轴(3)通过设置在所述容腔结构内的润滑轴承支撑旋转，所述压力补偿系统控制所述容腔结构内的压力大于容腔结构外的水压压力。
  2. 根据权利要求1所述的具有压力补偿功能的深水水泵，其特征在于，所述容腔结构为一内设有润滑油的油腔(5)，该油腔(5)与所述压力补偿系统连接，所述压力补偿系统控制所述油腔(5)内的油压压力大于油腔(5)外的水压压力。
  3. 根据权利要求2所述的具有压力补偿功能的深水水泵，其特征在于，所述压力补偿系统包括压力补偿油管(6)和压力补偿装置(7)，所述压力补偿油管(6)的一端与所述油腔(5)连通，另一端与所述压力补偿装置(7)连通。
  4. 根据权利要求2所述的具有压力补偿功能的深水水泵，其特征在于，所述油腔(5)内的油压压力大于油腔(5)外的水压压力的值为0.1bar-1.0bar。
  5. 根据权利要求2-4任一所述的具有压力补偿功能的深水水泵，其特征在于，所述液压马达(2)安装在所述油腔(5)一端的端面上，且该液压马达(2)带有输出轴的端部位于所述油腔(5)内。
  6. 根据权利要求2-4任一所述的具有压力补偿功能的深水水泵，其特征在于，所述润滑轴承包括相互套接的轴承套(10)和轴瓦(11)，所述轴瓦(11)与所述油腔(5)的内壁固接，所述轴承套(10)与所述泵轴(3)枢接，所述轴瓦(11)上设置有连通其两侧油腔(5)的通油孔(19)。
  7. 根据权利要求6所述的具有压力补偿功能的深水水泵，其特征在于，所述润滑轴承包括第一润滑轴承(8)和第二润滑轴承(9)，所述第一润滑轴承(8)和第二润滑轴承(9)与所述泵轴(3)套接。
  8. 根据权利要求7所述的具有压力补偿功能的深水水泵，其特征在于，所述油腔(5)的另一端设置有一个支撑法兰(12)，所述支撑法兰(12)设置在所述泵体(1)的进水腔(13)内，且该支撑法兰(12)的一端向所述叶轮(4)延伸且通过一端盖(14)密封，另一端与所述进水腔(13)的内壁固接，所述第一润滑轴承(8)设置在所述支撑法兰(12)内，所述泵轴(3)伸出所述端盖(14)的部分套接有机械密封(15)。
  9. 根据权利要求7所述的具有压力补偿功能的深水水泵，其特征在于，所述油腔(5)的一端为包括泵体凸缘(16)和转接套筒(17)的分体结构，所述液压马达(2)安装于所述 转接套筒(17)上，所述第二润滑轴承(9)的轴承套(10)通过一轴向锁止机构(22)限位在泵轴(3)的轴肩(23)的一侧，所述第二润滑轴承(9)的轴瓦(11)的一端密封连接于所述泵体凸缘(16)和转接套筒(17)之间，另一端卡接在所述第二润滑轴承(9)的轴承套(10)的环形限位凹槽(24)中。
  10. 根据权利要求9所述的具有压力补偿功能的深水水泵，其特征在于，所述泵体(1)位于所述水泵的出水口设置有导叶(18)。
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