WO2009033395A1 - Technique de réduction d'érosion et son dispositif pour pompe à dépôts et plasma centrifuge par rinçage de la région d'intervalle de réglage par du liquide - Google Patents

Technique de réduction d'érosion et son dispositif pour pompe à dépôts et plasma centrifuge par rinçage de la région d'intervalle de réglage par du liquide Download PDF

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Publication number
WO2009033395A1
WO2009033395A1 PCT/CN2008/072201 CN2008072201W WO2009033395A1 WO 2009033395 A1 WO2009033395 A1 WO 2009033395A1 CN 2008072201 W CN2008072201 W CN 2008072201W WO 2009033395 A1 WO2009033395 A1 WO 2009033395A1
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Prior art keywords
impeller
pump
bushing
liquid
gap
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PCT/CN2008/072201
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English (en)
French (fr)
Inventor
Benjiamin Cook
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Jinan Oriental Tianming Machinery Co., Ltd
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Publication date
Application filed by Jinan Oriental Tianming Machinery Co., Ltd filed Critical Jinan Oriental Tianming Machinery Co., Ltd
Publication of WO2009033395A1 publication Critical patent/WO2009033395A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/16Sealings between pressure and suction sides
    • F04D29/165Sealings between pressure and suction sides especially adapted for liquid pumps
    • F04D29/167Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2261Rotors specially for centrifugal pumps with special measures
    • F04D29/2294Rotors specially for centrifugal pumps with special measures for protection, e.g. against abrasion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
    • F04D29/4286Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps inside lining, e.g. rubber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps

Definitions

  • the present invention relates to a corrosion-reduction technique for various types of centrifugal slurry pumps, and more particularly to a corrosion-reduction technique and apparatus for scouring an impeller adjustment gap region with a high-pressure liquid. Suitable for horizontal and vertical centrifugal slurry pumps.
  • centrifugal slurry pumps are used to transport fluid media containing solid particles, ie, slurry. They are widely used in various mine production and watershed dredging, and their overcurrent components are subject to strong Abrasion effect.
  • the overcurrent component is the general term for the part of the pump part that is in direct contact with the slurry, including the impeller and the bushing.
  • the material of the flow-through parts can be selected from wear-resistant metal, polyurethane, rubber and other synthetic materials.
  • a horizontal centrifugal slurry pump with an abrasion resistant metal bushing includes an impeller, a volute, a front fender, and a rear fender. The latter three are collectively referred to as bushings.
  • the metal bushing horizontal centrifugal slurry pump is taken as an example to illustrate various problems existing in the prior art.
  • the pressure at the impeller outlet is higher than the pressure at the inlet.
  • Unbalanced pressure causes the slurry to remain in the impeller adjustment gap and create an abrasive effect on the flow components. What is even worse is that the slurry will reflow in the adjustment gap between the impeller front cover and the front guard, from the high pressure end to the low pressure end of the return path. This recirculation reduces the efficiency of the entire pump, and it also causes faster erosion of the impeller front cover and front guard of the gap, resulting in unsynchronized wear losses of the overcurrent components.
  • the adjustment clearance at the front end of the impeller is getting larger and larger, the return flow is increased, and the efficiency and hydraulic performance of the whole pump are also reduced.
  • the impeller adjustment gap needs to be adjusted to achieve the desired state.
  • both methods involve adjustments of other components, requiring the machine to be shut down, or even interrupting the entire conveyor system, which can affect the continuity of production.
  • the above two methods are fundamentally passive techniques for wear problems.
  • the above problems are also present in overcurrent components of other materials.
  • Impellers for slurry pumps now come in two main forms, heavy duty impellers and high efficiency impellers. Working on large granular media For transporting rafts, use heavy-duty impellers; for transporting fine-grained slurries, use high-efficiency impellers. Both impellers can use the centrifugal action of the secondary blades on the cover plate to expel the slurry portion of the impeller adjustment gap.
  • the limitation is that the presence of the secondary blades increases the energy consumption, and the removal of the slurry is not thorough, especially
  • the energy consumption of heavy-duty impellers is quite large; some high-efficiency impellers do not have sub-blades, but in practical applications, especially in the case of forcibly conveying large-grain slurries, the impeller adjustment gap is subject to rapid wear and tear, and the impeller cannot be applied. When adjusting the gap and ⁇ to adjust, the efficiency is lost, even less than the heavy impeller.
  • the nature of the slurry pump transport medium determines the erosion and corrosion of the overcurrent components, and the erosion of the impeller front end adjustment zone is particularly significant, and the affected overcurrent components have a short service life. It is not synchronized with the normal loss of other overcurrent components. When the wear is severe, it must be disposed of. After replacing the flow parts or adjusting the impeller adjustment clearance, the equipment must be completely disassembled to complete the replacement or adjustment. In order not to affect normal production, the mine will generally replace all the vulnerable parts in the conveyor system during the regular renovation period. The maintenance and renewal cost of the whole pump is quite high, which causes the operating cost of the enterprise to remain high.
  • the present invention provides a liquid scouring and erosion-reducing technique for adjusting the clearance area of various centrifugal slurry pump impellers.
  • the technical solution described in the present invention can effectively control the presence and backflow of the slurry in the adjustment gap zone of various centrifugal slurry pump impellers.
  • the specific method of the present invention is: continuously injecting a high pressure liquid into the impeller adjustment gap through a pipeline.
  • the specific operation steps are as follows: Before the slurry pump starts to operate, adjust the impeller adjustment gap as required for the process; then, continuously inject high-pressure liquid through the injection hole on the pump casing, and the high-pressure liquid flows in all directions under the action of pressure. Fill the entire impeller to adjust the gap area, and then achieve the purpose of flushing.
  • the present invention can be applied to various horizontal and vertical centrifugal slurry pumps which are made of wear-resistant metal, polyurethane, rubber and other synthetic materials.
  • Impeller adjustment clearance refers to the impeller front end adjustment clearance between the impeller front cover and the corresponding part of the bushing or the impeller rear end adjustment clearance between the impeller rear cover and the corresponding part of the bushing.
  • a slurry pump designed by the technique of the present invention, the pump head comprising a pump casing, an impeller and a bushing, the pump casing having at least one liquid injection hole, and the lower portion of the injection hole being connected to at least one liquid injection pipe
  • the injection line passes through the pump casing and the bushing, and the outlet of the pipe is located on the inner wall of the bushing.
  • the pump casing is generally constructed by closing the pump cover and the pump body.
  • the injection line passes through the pump casing and bushing, the injection line is fitted with a seal on the mating face of the pump casing and bushing.
  • the seal may be a sealing cartridge of various materials, or other existing seals may be used. This ensures that the high pressure liquid does not leak into the gap between the pump casing and the bushing.
  • injection holes There may be one or several injection holes on the pump casing.
  • An injection line is connected under each injection hole, and the outlet of each injection line is disposed on the inner wall of the bush of the impeller adjustment gap; in addition, the lower end of the injection hole can also be directly connected or connected through a blind hole.
  • a ring groove, the ring groove can be placed on the pump casing or bushing.
  • the high pressure liquid is branched by the ring groove into one or several through holes of the through bushing, and the other side outlet of the through hole is located on the inner wall of the bushing of the impeller adjusting gap; in order to ensure the balance of the injection pressure, the diameter of the through hole may be Not the same.
  • the mating mating surfaces of the injection line are fitted with seals. For better control of the pressure, only one injection hole can be provided on the pump casing. Compared with each injection hole, it corresponds to the design of one injection line.
  • the second design with ring groove is more economical and convenient after processing and use.
  • the impeller adjustment gap is always maintained in an ideal state, so that the high-efficiency impeller can also exert its high efficiency in conveying large particle slurry, thereby expanding the application range of the high-efficiency impeller.
  • Figure 2 is an enlarged view of A in Figure 1;
  • FIG. 3 is an enlarged view of the injection liquid line A of the solution provided in the sixth embodiment of the apparatus.
  • FIG. 1 Powerplant, 2. Pump cover, 3. Volute, 4. Impeller, 5. Front guard plate, 6. Inlet hole, 7. Filling port, 8. Long liquid blind hole,
  • Impeller front cover 11. Sub-blade, 12. Adjust the clearance area before the impeller, 13. High-pressure end of the return path, 14. Low-pressure end of the return path, 15. Ring groove, 16. Adjust the clearance after the impeller District, 17. Pump body.
  • the clean water is continuously injected into the impeller adjustment gap, and the slurry pump is turned on for material transportation.
  • the injection pressure of the clean water is adjusted according to the pressure of the impeller outlet in the conveying process to form a flushing of the gap region.
  • the clean water is continuously injected into the impeller adjustment gap, and the slurry pump is turned on for material transportation.
  • the injection pressure of the clean water is adjusted according to the pressure of the impeller outlet during the conveying process, so that it is always larger than the pump.
  • the high pressure end of the return path is also the pressure of the impeller outlet, forming a flush against the gap area.
  • the clean water is continuously injected into the impeller adjustment gap through the injection line running through the pump casing and the bushing to keep the pressure constant, and the slurry pump is turned on for material transportation, and the injected liquid The flushing of the gap area is formed.
  • the slurry pump is turned off, and the pressure maintaining time of the clean water is appropriately extended, and then the water is stopped.
  • the slurry pump Before starting the slurry pump, adjust the impeller to adjust the clearance to meet the process requirements. Through the injection line through the pump casing and the bushing, the filtrate of the slurry recovery is continuously injected into the adjustment gap of the front end of the impeller, and then opened.
  • the slurry pump carries the material conveying, and adjusts the injection pressure so that it is always greater than the high pressure end of the backflow path of the gap, that is, the pressure of the impeller outlet to ensure a good flushing effect on the gap.
  • the slurry pump Before the slurry pump starts to operate, adjust the impeller adjustment gap to meet the process requirements, and continuously transfer the filtrate from the slurry to the front and rear adjustment gaps of the impeller through the injection line and keep the injection pressure constant, and open the slag.
  • the slurry pump carries the material transportation, and the injected slurry of the diluted slurry forms a flushing of the gap region.
  • the slurry pump is closed, and the pressure-retaining day of the filtrate recovery filtrate is appropriately extended, and then the sludge is stopped. The slurry is recovered for delivery of the filtrate.
  • a metal bushing horizontal centrifugal slurry pump with impeller-adjusting clearance zone erosion and erosion technology including power unit (1), pump casing, impeller (4) and bushing.
  • the pump casing includes a pump body (17) and a pump cover (2), the bushing includes a volute, a front guard plate and a rear guard plate, and six injection holes (6) on the pump cover (2), the liquid injection hole ( 6)
  • the lower end corresponds to a long blind hole (8), which is also located on the pump cover (2) and is connected to the through hole through the front guard.
  • the outlet of the through hole is located at the front guard.
  • the impeller front cover (10) forms the side wall of the gap (12).
  • An annular rubber seal ⁇ (9) is installed at the abutting surface of the through hole and the long blind hole.
  • a metal bushing horizontal centrifugal slurry pump that uses an impeller to adjust the clearance zone erosion reduction technique, including a power unit, a pump casing, an impeller, and a bushing.
  • the pump casing includes a pump body and a pump cover, and the bushing includes a volute, a front guard, and a rear guard.
  • injection holes on the pump cover and the pump body there are four injection holes on the pump cover and the pump body respectively, and the lower end of the injection hole is correspondingly connected with a long blind hole of the injection liquid, and the long blind holes of the injection liquid are respectively located on the pump cover and the pump body, and penetrate through Front and rear guard plates, the outlets of the long blind holes for liquid injection are respectively located on the inner wall of the guard plate at the two ends of the impeller to adjust the gap area, and the pump cover or the pump body and the guard plate are installed with a ring at the mating connection surface through which the long blind hole is injected. Rubber seal ⁇ .
  • a metal bush horizontal centrifugal slurry pump using a impeller to adjust a clearance zone erosion reduction technique including a power device
  • the pump casing includes a pump body (17) and a pump cover (2).
  • the bushing includes a volute, a front guard plate and a rear guard plate, and has a liquid injection hole on the pump cover (2) and the pump body (17).
  • the lower end of the liquid hole is connected to a ring groove through a blind hole, and the ring groove is respectively disposed on the pump cover (2) and the pump body (17), and the ring groove is
  • the four through holes of the front and rear guard plates are respectively connected, and the other side outlet of the through hole is located on the inner wall of the guard plate for adjusting the gap at both ends of the impeller, and a sealing member is installed at the joint connection surface of the guard plate and the ring groove.
  • a metal bush horizontal centrifugal slurry pump using a impeller to adjust a clearance zone erosion reduction technique including a power unit
  • the pump casing includes a pump body (17) and a pump cover (2).
  • the bushing includes a volute, a front guard plate and a rear guard plate.
  • the pump cover (2) has a liquid injection hole, and the lower end of the liquid injection hole is connected through a blind hole.
  • a ring groove is disposed on the pump cover (2), the ring groove is connected with the six through holes penetrating the front guard plate, and the other side outlet of the through hole is located on the inner wall of the front guard plate of the front wheel adjustment gap,
  • a sealing member is installed at the mating connection surface of the front fender and the ring groove.
  • a metal bush horizontal centrifugal slurry pump using a impeller to adjust a clearance zone erosion reduction technique including a power plant
  • the pump casing includes a pump body (17) and a pump cover (2).
  • the bushing includes a volute, a front guard plate and a rear guard plate.
  • the pump body (17) has a liquid injection hole, and the lower end of the liquid injection hole is directly connected to a ring.
  • the groove, the ring groove is disposed on the pump body (17), the ring groove is connected with the three through holes penetrating through the rear guard plate, and the other side outlet of the through hole is located on the inner wall of the rear guard plate of the rear end adjustment groove of the impeller, after A sealing member is installed at the joint surface of the guard plate and the ring groove.
  • a metal bush horizontal centrifugal slurry pump using a impeller to adjust a clearance zone erosion reduction technique including a power plant
  • the pump casing includes a pump body (17) and a pump cover (2).
  • the bushing includes a volute, a front guard plate and a rear guard plate.
  • the pump cover (2) has a liquid injection hole, and the lower end of the liquid injection hole is connected through a blind hole.
  • a ring groove the ring groove is disposed on the front fender, the ring groove has six through holes penetrating the front fender, and the other side outlet of the through hole is located on the inner wall of the front fender of the impeller front adjustment gap, in the pump cover (2)
  • a sealing port is installed at the joint surface of the ring groove.
  • a metal bush horizontal centrifugal slurry pump using a impeller to adjust a clearance zone erosion reduction technique including a power device
  • the pump casing includes a pump body (17) and a pump cover (2).
  • the bushing includes a volute, a front guard plate and a rear guard plate.
  • the pump body (17) has a liquid injection hole, and the lower end of the liquid injection hole is connected through a blind hole.
  • a ring groove, the ring groove is disposed on the rear guard plate, and the ring groove has five through holes penetrating through the rear guard plate, the through hole
  • the other side outlet is located on the inner wall of the rear guard plate at the rear end of the impeller, and a sealing port is mounted on the mating joint surface of the pump body (17) and the ring groove.
  • a polyurethane bushing horizontal centrifugal slurry pump that uses an impeller to adjust the clearance zone erosion reduction technique, including a power device, a pump casing, an impeller, and a bushing.
  • the pump casing includes a pump body and a pump cover; the bushing front and rear jackets are made of polyurethane.
  • liquid injection hole on the pump body, the lower end of the liquid injection hole is connected to a ring groove through a blind hole, the ring groove is arranged on the rear sheath, and the ring groove has five through holes penetrating the rear sheath, and the other through hole
  • the side outlets are all located on the inner wall of the rear sheath of the adjustment groove of the rear end of the impeller, and a sealing jaw is installed at the joint surface of the pump body and the ring groove.
  • a rubber bushing horizontal centrifugal slurry pump that uses an impeller to adjust the clearance zone erosion prevention technology, including a power unit, a pump casing, an impeller, and a bushing.
  • the pump casing includes a pump body and a pump cover; the bushing includes a front jacket and a rear jacket, and is made of rubber.
  • liquid injection hole on the pump cover and the pump body, and the lower end of the liquid injection hole is connected to a ring groove through a blind hole, and the ring groove is respectively disposed on the pump cover and the pump body, and the ring groove and each of the four through pipes respectively passing through the front and rear sheaths
  • the holes are connected, and the other side outlets of the through holes are respectively located on the inner wall of the front and rear sheaths of the impeller at both ends of the adjustment groove, and a sealing member is installed at the joint surface of the sheath and the ring groove.

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

Description

说明书 离心式渣浆泵叶轮调整间隙区冲刷降蚀技术及其设备 技术领域:
[1] 本发明涉及各类离心式渣浆泵的降蚀技术, 尤其涉及一种釆用高压液体对叶轮 调整间隙区进行冲刷的降蚀技术及其设备。 适用于卧式和立式离心渣浆泵。
[2] 背景技术:
[3] 各类离心式渣浆泵, 是用来输送含固体颗粒的流体介质即渣浆的一种设备, 广 泛应用于各类矿山生产和水域清淤, 其过流部件会受到较强的磨蚀作用。 过流 部件是指整泵零件中直接与渣浆发生接触的零件总称, 包括叶轮和衬套。 为适 应不同性质的渣浆和工况要求, 过流部件的材质可以选择耐磨蚀金属、 聚氨脂 、 橡胶以及其他的合成材料。 以釆用耐磨蚀金属衬套的卧式离心渣浆泵为例, 其过流部件包括叶轮、 蜗壳、 前护板和后护板, 后三项的总称为衬套。
[4] 现以金属衬套卧式离心渣浆泵为例加以说明现有技术中存在的各种问题。 渣浆 泵在运转过程中, 其叶轮出水口的压力要高于进水口的压力。 压力的不均衡导 致渣浆在叶轮调整间隙区存留, 并产生对过流部件的磨蚀作用。 为害更甚的是 , 渣浆会在叶轮前盖板与前护板之间的叶轮前端调整间隙区发生回流, 方向自 回流路径高压端至低压端。 这种回流作用会降低整泵的效率, 同吋也造成该间 隙区叶轮前盖板和前护板的较快磨蚀, 导致过流部件磨蚀损耗不同步。 在磨蚀 作用下, 叶轮前端调整间隙越来越大, 回流量增多, 整泵的效率及水力性能也 随之下降。 当整泵效率低到不能满足工况要求吋, 就需要对叶轮调整间隙进行 调整, 以达到理想的状态。 叶轮调整间隙有两种基本的调整方法, 一是利用调 整螺栓使叶轮前盖板靠近前护板, 另一种方法是移动前护板使其接近叶轮。 两 种方法都能达到缩小叶轮前端调整间隙的目的, 从而恢复整泵的效率。 但是两 种方法都会涉及其他部件的调整, 需要将整机停机, 甚至是中断整个输送系统 才可进行这样就影响到生产的连续性。 总的来说, 上述两种方法根本上还是对 磨损问题的被动处理技术。 而其他材质的过流部件也均存在上述问题。
[5] 渣浆泵的叶轮现在主要有两种形式, 重型叶轮和高效叶轮。 在进行大颗粒介质 的输送吋, 釆用重型叶轮; 输送细微颗粒的渣浆, 则釆用高效叶轮。 两种叶轮 都可以利用其盖板上副叶片的离心作用将叶轮调整间隙中的渣浆部分驱逐出去 , 局限是副叶片的存在增大了能耗, 而且渣浆的清除也并不彻底, 尤其是重型 叶轮的能耗相当大; 有些高效叶轮虽然没有设置副叶片, 但是在实际应用中, 尤其是在强行输送大颗粒渣浆吋, 其叶轮调整间隙受到的磨损速度很快, 在不 能对叶轮调整间隙及吋进行调整的情况下, 高效性随之丧失, 甚至不及重型叶 轮。
[6] 综上所述, 渣浆泵输送介质的性质决定了过流部件所受到的磨蚀和腐蚀不可避 免, 其中叶轮前端调整间隙区的磨蚀尤为显著, 受到影响的过流部件使用寿命 较短且与其他过流部件的正常损耗不同步, 当磨损较严重吋, 就必须作报废处 理。 在更换过流部件或调整叶轮调整间隙吋, 需将设备完全拆解才可以完成更 换或调整。 为了不影响正常生产, 矿山一般会在定期整修期间成批更换输送系 统中所有的易损部件, 整泵的维护更新成本相当高, 造成企业的运转成本居高 不下。
[7] 发明内容:
[8] 针对现有技术存在的诸多不足, 本发明专利提供一种各类离心式渣浆泵叶轮调 整间隙区液体冲刷降蚀技术。 釆用本发明所述的技术方案可以有效控制各类离 心渣浆泵叶轮调整间隙区渣浆的存在和回流。
[9] 本发明的具体方法是: 通过管路将高压液体持续注入到叶轮调整间隙中。 具体 的操作步骤是: 在渣浆泵开始运转前, 调整叶轮调整间隙为工艺所需; 然后, 通过泵壳上的注液孔持续注入高压液体, 高压液体在压力的作用下向各个方向 流动, 充满整个叶轮调整间隙区, 进而达到冲刷的目的。
[10] 本发明可以应用于以耐磨金属、 聚氨脂、 橡胶以及其他合成材料为衬套材质的 各类卧式和立式离心渣浆泵。
[11] 叶轮调整间隙是指叶轮前盖板和衬套对应部位之间的叶轮前端调整间隙或叶轮 后盖板和衬套对应部位之间的叶轮后端调整间隙。 某些渣浆泵已经釆用填料水 对其叶轮后端调整间隙进行冲刷, 故对于这种渣浆泵只有其叶轮前端调整间隙 适用本发明技术。 [12] 高压液体的选择, 其决定因素主要是输送介质的性质, 因此可以选择各种与输 送介质性质相似的液体, 因为外来液体会对输送介质产生一定的稀释作用, 甚 至产生激烈的反应; 因此理想的选择是清水或渣浆回收滤液作为高压介质。 高 压液体的压力应大于叶轮出水口的压力以保证冲刷的效果。 高压液体的压力通 过现有技术进行调节。
[13] 釆用本发明所述技术设计的渣浆泵, 其泵头包括泵壳、 叶轮和衬套, 泵壳上有 至少一个注液孔, 注液孔下部与至少一条注液管路连通, 注液管路穿过泵壳及 衬套, 管路的出口位于衬套的内壁上。 就渣浆泵而言, 泵壳一般由泵盖和泵体 合拢构成。
[14] 因为注液管路穿过了泵壳和衬套, 所以注液管路在泵壳和衬套的配合面安装有 密封件。 该密封件可以是釆用各种材料的密封圏, 也可釆用现有的其他密封件 。 这样就可以保证高压液体不会泄漏到泵壳与衬套之间的空隙中。
[15] 泵壳上可以有一个或若干注液孔。 每个注液孔下都连接一条注液管路, 每条注 液管路的出口均设在叶轮调整间隙的衬套的内壁上; 另外, 注液孔下端也可以 直接连接或通过盲孔连接一个环槽, 环槽可设置在泵壳或衬套上。 由环槽将高 压液体分流到贯穿衬套的一个或若干通孔, 通孔的另一侧出口位于叶轮调整间 隙的衬套内壁上; 为了保证注液压力的均衡性, 该通孔的直径可以不相同。 注 液管路的对接配合面均配有密封件。 为了更好的控制压力可以在泵壳上仅设置 一个注液孔。 较之每个注液孔均对应一条注液管路的设计, 第二种带有环槽的 设计在加工、 使用吋更加的经济和方便。
[16] 综上所述, 由于在渣浆泵启动前就将高压液体持续注入到了叶轮调整间隙中形 成冲刷, 渣浆泵运转过程中此处渣浆的存在和回流得到有效控制, 从而减少了 渣浆对于该间隙区过流部件的腐蚀和磨损, 使过流部件的正常损耗同步, 其使 用寿命得以延长, 叶轮调整间隙的调整次数减少, 相应地整泵的水力性能长吋 间得以保证。 企业的维护和运转成本显著降低。 另外, 由于该项发明使得磨蚀 影响的减少, 叶轮调整间隙始终保持在理想状态, 使得高效叶轮在输送大颗粒 渣浆吋也能发挥出其高效性, 由此扩大了高效叶轮的应用范围。
[17] 附图说明: [18] 图 1是本发明所述设备实施例 1中离心式渣浆泵的结构示意图;
[19] 图 2是图 1中的 A处放大图;
[20] 图 3是釆用设备实施例 6所提供方案吋注液管路 A处放大图。
[21] 图中 1.动力装置, 2.泵盖, 3.蜗壳, 4.叶轮, 5.前护板, 6.进液孔, 7.注液口, 8. 注液长盲孔,
9.密封件, 10.叶轮前盖板, 11.副叶片, 12.叶轮前调整间隙区, 13.回流路径高压 端, 14.回流路径低压端, 15.环槽, 16.叶轮后调整间隙区, 17.泵体。
[22] 具体实施方式:
[23] 技术实施例 1
[24] 在渣浆泵启动前, 将清水持续注入到叶轮调整间隙中, 开启渣浆泵进行物料输 送, 根据输送过程中叶轮出水口的压力调节清水的注入压力, 形成对间隙区域 的冲刷。
[25] 技术实施例 2
[26] 在渣浆泵启动前, 将清水持续注入到叶轮调整间隙中, 开启渣浆泵进行物料输 送, 根据输送过程中叶轮出水口的压力调节清水的注入压力, 使其始终大于泵 内的回流路径的高压端也就是叶轮出水口的压力, 形成对间隙区域的冲刷。
[27] 技术实施例 3
[28] 在渣浆泵启动前, 通过贯穿泵壳及衬套上的注液管路, 将清水持续注入到叶轮 调整间隙中, 保持其压力恒定, 开启渣浆泵进行物料输送, 注入的液体形成对 间隙区域的冲刷, 当物料输送结束后, 关闭渣浆泵, 并适当的延长清水的保压 吋间, 然后停止清水的输送。
[29] 技术实施例 4
[30] 在启动渣浆泵前, 调节叶轮调整间隙使其符合工艺要求, 通过贯穿泵壳和衬套 的注液管路, 将稀渣浆回收滤液持续注入到叶轮前端调整间隙中, 然后开启渣 浆泵进行物料输送, 调节注液压力使其始终大于该间隙回流路径的高压端也就 是叶轮出水口的压力, 以保证对该间隙良好的冲刷效果。
[31] 技术实施例 5
[32] 在启动渣浆泵前, 通过注液管路将清水注入到叶轮后端调整间隙中, 开启渣浆 泵进行物料输送, 根据输送过程中叶轮出水口的压力调节清水的注入压力, 使 其始终大于泵内的叶轮后端调整间隙的最大压力, 形成对叶轮后端间隙区域的 冲刷。
[33] 技术实施例 6
[34] 在渣浆泵开始运转前, 调整叶轮调整间隙符合工艺要求, 通过注液管路将稀渣 浆回收滤液同吋持续注入到叶轮的前后调整间隙中并保持注液压力恒定, 开启 渣浆泵进行物料输送, 注入的稀渣浆回收滤液形成对间隙区域的冲刷, 当物料 输送结束后, 关闭渣浆泵, 并适当的延长稀渣浆回收滤液的保压吋间, 然后停 止稀渣浆回收滤液的输送。
[35] 设备实施例 1
[36] 一台釆用叶轮调整间隙区冲刷降蚀技术的金属衬套卧式离心渣浆泵, 包括动力 装置 (1) 、 泵壳、 叶轮 (4) 和衬套。 泵壳包括泵体 (17) 和泵盖 (2) , 衬套 包括蜗壳、 前护板和后护板, 在泵盖 (2) 上有六个注液孔 (6) , 注液孔 (6) 下端对应一条注液长盲孔 (8) , 该注液长盲孔同样也位于泵盖 (2) 上, 并与 贯穿前护板的通孔对接, 通孔的出口位于前护板与叶轮前盖板 (10) 形成间隙 (12) 的侧壁。 通孔和长盲孔对接面处安装有环形橡胶密封圏 (9) 。
[37] 设备实施例 2
[38] 一种釆用叶轮调整间隙区降蚀技术的金属衬套卧式离心渣浆泵, 包括动力装置 、 泵壳、 叶轮和衬套。 泵壳包括泵体和泵盖, 衬套包括蜗壳、 前护板和后护板 。 在泵盖和泵体上均分别有四个注液孔, 注液孔下端均对应与一条注液长盲孔 连通, 该注液长盲孔分别对应的位于泵盖和泵体上, 并贯穿前、 后护板, 注液 长盲孔的出口分别位于叶轮两端调整间隙区域的护板内壁上, 泵盖或泵体和护 板被注液长盲孔贯穿的配合连接面处安装有环形橡胶密封圏。
[39] 设备实施例 3
[40] 一种釆用叶轮调整间隙区降蚀技术的金属衬套卧式离心渣浆泵, 包括动力装置
(1) 、 泵壳、 叶轮 (4) 和衬套。 泵壳包括泵体 (17) 和泵盖 (2) , 衬套包括 蜗壳、 前护板和后护板, 在泵盖 (2) 和泵体 (17) 上均有一个注液孔, 注液孔 下端通过盲孔连接一个环槽, 环槽分别设置在泵盖 (2) 和泵体 (17) , 环槽与 分别贯穿前后护板的各四个通孔连接, 通孔的另一侧出口位于叶轮两端调整间 隙的护板内壁上, 在护板与环槽的配合连接面处均安装有密封件。
[41] 设备实施例 4
[42] 一种釆用叶轮调整间隙区降蚀技术的金属衬套卧式离心渣浆泵, 包括动力装置
(1) 、 泵壳、 叶轮 (4) 和衬套。 泵壳包括泵体 (17) 和泵盖 (2) , 衬套包括 蜗壳、 前护板和后护板, 在泵盖 (2) 上有一个注液孔, 注液孔下端通过盲孔连 接一个环槽, 环槽设置在泵盖 (2) 上, 环槽与贯穿前护板的六个通孔连接, 通 孔的另一侧出口均位于叶轮前调整间隙的前护板内壁上, 在前护板与环槽的配 合连接面处均安装有密封件。
[43] 设备实施例 5
[44] 一种釆用叶轮调整间隙区降蚀技术的金属衬套卧式离心渣浆泵, 包括动力装置
(1) 、 泵壳、 叶轮 (4) 和衬套。 泵壳包括泵体 (17) 和泵盖 (2) , 衬套包括 蜗壳、 前护板和后护板, 在泵体 (17) 上有一个注液孔, 注液孔下端直接连接 一个环槽, 环槽设置在泵体 (17) 上, 环槽与贯穿后护板的三个通孔连接, 通 孔的另一侧出口均位于叶轮后端调整间隙的后护板内壁上, 在后护板与环槽的 配合连接面处均安装有密封件。
[45] 设备实施例 6
[46] 一种釆用叶轮调整间隙区降蚀技术的金属衬套卧式离心渣浆泵, 包括动力装置
(1) 、 泵壳、 叶轮 (4) 和衬套。 泵壳包括泵体 (17) 和泵盖 (2) , 衬套包括 蜗壳、 前护板和后护板, 在泵盖 (2) 上有一个注液孔, 注液孔下端通过盲孔连 接一个环槽, 环槽设置在前护板上, 环槽上有贯穿前护板的六个通孔, 通孔的 另一侧出口均位于叶轮前调整间隙的前护板内壁上, 在泵盖 (2) 与环槽的配合 连接面处均安装有密封圏。
[47] 设备实施例 7
[48] 一种釆用叶轮调整间隙区降蚀技术的金属衬套卧式离心渣浆泵, 包括动力装置
(1) 、 泵壳、 叶轮 (4) 和衬套。 泵壳包括泵体 (17) 和泵盖 (2) , 衬套包括 蜗壳、 前护板和后护板, 在泵体 (17) 上有一个注液孔, 注液孔下端通过盲孔 连接一个环槽, 环槽设置在后护板上, 环槽上有贯穿后护板的五个通孔, 通孔 的另一侧出口位于叶轮后端调整间隙的后护板内壁上, 在泵体 (17) 与环槽的 配合连接面处均安装有密封圏。
[49] 设备实施例 8
[50] 一种釆用叶轮调整间隙区降蚀技术的聚氨脂衬套卧式离心渣浆泵, 包括动力装 置、 泵壳、 叶轮和衬套。 泵壳包括泵体和泵盖; 衬套包前护套和后护套, 釆用 聚氨酯制得。 在泵体上有一个注液孔, 注液孔下端通过盲孔连接一个环槽, 环 槽设置在后护套上, 环槽上有贯穿后护套的五个通孔, 通孔的另一侧出口均位 于叶轮后端调整间隙的后护套内壁上, 在泵体与环槽的配合连接面处均安装有 密封圏。
[51] 设备实施例 9
[52] 一种釆用叶轮调整间隙区降蚀技术的橡胶衬套卧式离心渣浆泵, 包括动力装置 、 泵壳、 叶轮和衬套。 泵壳包括泵体和泵盖; 衬套包括前护套和后护套, 釆用 橡胶制得。 在泵盖和泵体上均有一个注液孔, 注液孔下端通过盲孔连接一个环 槽, 环槽分别设置在泵盖和泵体, 环槽与分别贯穿前后护套的各四个通孔连接 , 通孔的另一侧出口分别位于叶轮两端调整间隙的前后护套内壁上, 在护套与 环槽的配合连接面处均安装有密封件。

Claims

权利要求书
1.一种离心式渣浆泵叶轮调整间隙区冲刷降蚀技术, 其特征在于: 将液体 持续注入到叶轮调整间隙中, 进行冲刷。
2.根据权利要求 1所述的降蚀技术, 其特征在于: 将高压液体持续注入到叶 轮调整间隙中, 进行冲刷。
3.根据权利要求 1或 2所述的降蚀技术, 其特征在于: 通过管路将高压液体 持续注入到叶轮调整间隙中, 进行冲刷。
4.根据权利要求 1或 2或 3所述的降蚀技术, 其特征在于: 具体的操作步骤是 : 在渣浆泵开始运转前, 调整叶轮调整间隙为工艺所需间隙, 通过注液管 路, 将高压液体持续注入到叶轮调整间隙中; 开启渣浆泵进行渣浆输送, 调节高压液体压力, 使其始终大于泵的最大内压即叶轮出水口最大压力, 以达到良好的冲刷效果。
5.根据权利要求 1或 2或 3或 4所述的降蚀技术, 其特征在于: 所述叶轮调整 间隙为叶轮盖板和衬套之间的叶轮前端调整间隙与叶轮后端调整间隙。
6.—种釆用叶轮调整间隙区液体冲刷降蚀技术的离心式渣浆泵, 包括泵壳 、 叶轮 (4) 和衬套, 泵壳包括泵体 (17) 和泵盖 (2) , 其特征在于: 在 泵壳上有至少一个注液孔, 注液孔下部与至少一条注液管路连通, 注液管 路贯穿泵壳及衬套, 管路的出口位于叶轮调整间隙区衬套内壁上。
7根据权利要求 6所述的离心式渣浆泵, 其特征在于: 在泵壳上至少有一个 注液孔 (6) , 注液孔 (6) 下部对应与一条注液长盲孔 (8) 连通, 注液长 盲孔 (8) 穿过泵壳及衬套, 管路的出口位于衬套与叶轮盖板形成的叶轮调 整间隙的衬套内壁上。
8.
根据权利要求 6所述的离心式渣浆泵, 其特征在于: 在泵壳上至少有一个注 液孔 (6) , 注液孔下端直接连接或通过盲孔连接一个环槽 (15) , 环槽 ( 15) 设置在泵壳或衬套上, 环槽与贯穿衬套的一个或若干通孔连接, 通孔 的另一侧出口位于叶轮调整间隙的衬套内壁上。
9.根据权利要求 6或 7或 8所述的离心式渣浆泵, 其特征在于: 所述泵壳和衬 套被注液长盲孔贯穿的配合连接面处或, 泵壳或衬套与环槽的配合连接面 处均安装有密封件 (9) 。
10.根据权利要求 9所述的离心式渣桨泵, 其特征在于: 所述的密封件 (9) 为环形橡胶密封圏。
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