High-flow abrasion-resistant high-temperature end-suction double-suction pump

Abstract

The utility model relates to a high-flow abrasion-resistant high-temperature end-suction double-suction pump which comprises a pump body, a double-suction impeller, a pump shaft, a pump cover, a sealing component, a bearing body component and a base. The pump suction inlet is in the horizontal direction, the discharge outlet is in the vertical direction, the pump suction inlet is provided with a flow dividing flow channel dividing the suction inlet, and the flow dividing flow channel divides the impeller suction inlet into a first impeller suction inlet and a second impeller suction inlet. The inner side of a cover plate of the double-suction impeller is provided with a divergent opening, and the volute end face of the pump body is of an internal spiral structure and a protruding structure. A plurality of reverse thread grooves are formed in the contact part of the pump body and the sealing ring, and the spiral direction of the reverse thread grooves is opposite to the rotating direction of the double-suction impeller; the pump cover is of an annular suction type structure. The pump cover is fixed on the bearing body component, and the pump body is supported by a horizontal supporting column in the center of the bottom of the pump body. The axial and radial load balance problem during operation of the pump set is solved, the axial force and the radial force are self-balanced during operation of the pump set, the operation is stable, and the reliability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high temperature end suction double suction pump, especially to a double channel double volute pump body matched with double suction impeller under the condition of meeting equal parameters, solve the axial and radial load balance problem when pump set operation, axial force and radial force are self -balancing when pump set operation, stable operation, high reliability's high -flow abrasion -resistant high temperature end suction double suction pump. BACKGROUND

[0002] Abrasion -resistant high temperature end suction double suction pump is a center support, horizontal end suction, top discharge straight connection horizontal double suction pump.

[0003] The existing high -flow abrasion -resistant high temperature end suction centrifugal pump due to its single -stage single suction impeller design, the area of impeller front and back cover plate is inconsistent and leads to the existence of axial force, although the axial force can be balanced through various ways, but these measures are to increase the cost or reduce the pump performance to realize and the existing structure mostly adopts single volute structure, the radial force of pump operation also can not realize balance.

[0004] The existing high -flow abrasion -resistant high temperature end suction centrifugal pump under the condition of equal flow, the volume of single -stage pump increases significantly and the axial load increases significantly, the efficiency reduces, there is a safe operation hidden danger, and the cost increases significantly.

[0005] The existing high -flow abrasion -resistant high temperature end suction centrifugal pump impeller outlet mostly adopts the traditional hydraulic design mode, which can not solve the erosion of particles and solid impurities to the flow part from the hydraulic design aspect.

[0006] The existing high -flow abrasion -resistant high temperature end suction centrifugal pump impeller and pump body sealing ring mostly adopt the traditional circumferential structure form, which can improve the running efficiency by reducing the gap, but under the condition of containing solid particles or impurities, the impurities may be stuck.

[0007] Most of the existing high -flow abrasion -resistant high temperature end suction centrifugal pump adopts the foot support mode, which may cause the pump rotor to bend and deform due to uneven expansion of the pump under high temperature, and there are serious operation reliability problems.

[0008] In order to solve the above problems, the balance hole or rear ring is usually machined on the impeller, and the horizontal double suction pump with equal parameters is used. UTILITY MODEL CONTENTS

[0009] In order to solve the above problems, the utility model discloses a main purpose at providing a kind of in satisfying equivalent parameter condition using double-suction impeller supporting double-channel double volute pump body, solve the axial and radial load balance problem when pump set runs, axial force and radial force self-balancing when pump set runs, stable operation, high reliability Large flow abrasion-resistant high-temperature end suction double-suction pump.

[0010] The utility model discloses a large flow abrasion-resistant high-temperature end suction double-suction pump, the large flow abrasion-resistant high-temperature end suction double-suction pump includes: pump body, double-suction impeller, pump shaft, pump cover, sealing component, bearing body component, base.

[0011] Pump suction inlet is horizontal direction, and the outlet is vertical direction, and the pump suction inlet is provided with the shunt flow passage that divides the suction inlet, and the shunt flow passage divides the impeller suction inlet into first impeller suction inlet and second impeller suction inlet.

[0012] The cover plate inside of double-suction impeller adopts gradually expanding shape, and the volute end face of pump body adopts internal spiral structure and convex structure.

[0013] Sealing ring is arranged between pump body and double-suction impeller, and a plurality of reverse screw grooves are arranged at the part of pump body and sealing ring, and the spiral direction thereof is opposite to the rotating direction of double-suction impeller.

[0014] Pump cover adopts annular suction type structure, and the pump cover is fixed on bearing body component, and the large flow abrasion-resistant high-temperature end suction double-suction pump further includes: flushing component installed on the outside of pump body and connected with sealing component and pump outlet.

[0015] Pump body is supported by horizontal support column in the center of pump body bottom, and the horizontal support column is fixed on base.

[0016] In the embodiment of the utility model, horizontal support column is connected with base through bolt.

[0017] In the embodiment of the utility model, the annular suction type structure of pump cover includes pump cover body and streamlined transition surface integrated with pump cover body.

[0018] In the embodiment of the utility model, pump cover body is fixed on bearing body component by screw.

[0019] In the embodiment of the utility model, double-suction impeller is double-suction impeller with same area of front and back cover plates.

[0020] The utility model has the following advantages compared with common technology: the utility model provides large flow abrasion-resistant high-temperature end suction double-suction pump.

[0021] 1. The utility model discloses a compact and efficient end-suction double-channel double-volute pump body which is designed newly and matched with double-suction impellers under the condition of meeting equal parameters, solves the axial and radial load balance problem during pump set operation, and realizes self-balance of axial force and radial force during pump set operation, so that the pump set is stable in operation and high in reliability.

[0022] 2. The utility model discloses a double-suction design which reduces the cavitation specific speed, reduces the risk of cavitation due to too low saturated vapor pressure of fluid under high temperature, and significantly reduces the radial size of the water pump and effectively reduces the manufacturing cost.

[0023] 3. The utility model discloses a new type of impeller and volute end face design method, which realizes the control of pump body and impeller wear under the working condition of containing impurities and scouring sediment under the premise of meeting the hydraulic requirement, improves the operation life of the pump body and impeller, and improves the reliability and economy of pump operation.

[0024] 4. The utility model discloses a multi-line reverse thread groove design at the pump body sealing ring and impeller sealing ring part, which is simple in processing and manufacturing, high in practical performance, has a spiral groove at the impeller inlet end, effectively improves the throttling effect, solves the accumulation of solid particles and impurities at the impeller inlet, and improves the operation efficiency and reliability of the pump.

[0025] 5. The utility model discloses a horizontal center support mode for the pump body and a ring suction type symmetrical design mode for the pump cover, which solves the problem of uneven deformation under high temperature, effectively improves the operation reliability of the pump set under high temperature, is simple in processing and manufacturing, high in economy, and improves the customer value. DRAWINGS

[0026] Figure 1 It is a sectional view of the overall structure schematic diagram of the utility model.

[0027] Figure 2 It is a left view of the utility model.

[0028] Figure 3-1 It is Figure 1 An enlarged view of the convex structure at position A.

[0029] Figure 3-2 It is Figure 1 An enlarged view of the reverse thread groove position at position B.

[0030] Figure 3-3 It is Figure 1 An enlarged view of the gradually expanding shape at position C.

[0031] Figure 4 It is a structure schematic diagram of the reverse thread groove shape in the utility model.

[0032] The following is the name corresponding to the label in the utility model:

[0033] It comprises a pump body 1, a locking nut 2, a sealing ring 3, a double-suction impeller 4, a pump shaft 5, a pump cover 6, a sealing component 7, a flushing component 8, a bearing body component 9, a base 10, a shunt flow channel 11, a first impeller suction inlet 12, a second impeller suction inlet 13, a pump suction inlet 14, a discharge outlet 15, an internal spiral structure 101, a convex structure 102, a gradually expanding port 401, a reverse thread groove 402, a pump cover body 601, and a transition surface 602. DETAILED DESCRIPTION

[0034] The utility model discloses a preferred embodiment is shown below in conjunction with the drawings to detail the technical scheme of the utility model.

[0035] Figure 1 It is the sectional view of the whole structure schematic diagram of the utility model, Figure 2 It is the left view of the utility model, as Figure 1-2 The utility model discloses a kind of high-temperature end suction double-suction pumps of large flow abrasion resistance, and the high-temperature end suction double-suction pump of large flow abrasion resistance includes: pump body 1, double-suction impeller 4, pump shaft 5, pump cover 6, sealing component 7, bearing body component 9, base 10.

[0036] Pump suction inlet 14 is horizontal direction, and discharge outlet 15 is vertical direction, and pump suction inlet is provided with shunt flow channel 11 separating suction inlet, and shunt flow channel divides impeller suction inlet into first impeller suction inlet 12 and second impeller suction inlet 13.Two suction inlets divide the total flow of pump, under the condition that lift is unchanged, reduce cavitation specific speed, reduce the risk of cavitation due to fluid saturated vapor pressure is too low under high temperature, and water pump radial dimension is significantly reduced, and processing cost is effectively reduced.

[0037] Figure 3-3 It is Figure 1 The enlarged view (gradually expanding port) of C in Figure 3-3 , gradually expanding port 401 is used to the inner side of the cover plate of double-suction impeller 4, and internal spiral structure 101 and convex structure 102 are used to the volute end face of pump body 1, refer to Figure 3-1 Solid particles and impurities are moved to gradually expanding port 401 of double-suction impeller 4 after pressurization by double-suction impeller 4, then enter volute and are discharged after centrifugal effect of volute spiral convex end face, effectively solve the retention of solid particles and impurities in pump body volute, and pump body 1 is cooperatively designed with double-suction impeller 4, so that the erosion of medium internal particles to pump body flow channel and impeller cover plate is effectively reduced.

[0038] The pump cover 6 adopts a ring suction type structure; the pump cover 6 is fixed on the bearing body part 9, and the large-flow anti-erosion high-temperature end suction double-suction pump further comprises a flushing part 8 which is installed outside the pump body 1 and is connected with the sealing part 7 and the pump outlet.

[0039] The pump body 1 is supported by a horizontal support column at the center of the bottom of the pump body, and the horizontal support column is fixed on the base 10 and connected with the base 10 through bolts.

[0040] The double-suction impeller 4 in the utility model is a double-suction impeller with the same area of front and back cover plates, and the pump body 1 adopts a double-volute design for the discharge chamber, so that the radial force is self-balanced during the operation of the pump set; the double-suction impeller 4 can balance the axial force by itself due to the same area of the front and back cover plates, and the two are matched and designed, so that the axial and radial load problems during the operation of the shaft are effectively solved, the significant technical problem of pump operation is solved without increasing external mechanisms, the reliability of the pump operation is greatly improved, the leakage and backflow in the water pump are reduced due to the cancellation of the single-stage single-suction impeller balance hole design, the operation efficiency of the water pump is effectively improved, and the energy saving and efficient utilization of energy are realized.

[0041] Figure 3-2 For Figure 1 An enlarged view of B (the position of the reverse thread groove), Figure 4 For the structure diagram of the shape of the reverse thread groove in the utility model, as shown in the above figure: the sealing ring 3 is arranged between the pump body 1 and the double-suction impeller 4, and a plurality of reverse thread grooves 402 are arranged at the position where the pump body 1 and the sealing ring 3 are in contact.

[0042] The sealing ring 3 is designed on both sides of the pump body 1, and the sealing ring 3 and the double-suction impeller 4 are matched with the circumferential surface and are designed with a plurality of thread grooves 402, the rotation directions of the thread grooves are opposite, in the running state, the two thread grooves interact with each other, generate a reverse spiral sealing effect, prevent the leakage fluid at the outlet of the volute of the pump body 1 from flowing back to the inlet position of the double-suction impeller 4, and due to the spiral propulsion effect, effectively prevent solid particles and impurities from entering between the sealing ring 3 and the double-suction impeller 4. It can effectively improve the throttling effect and improve the pump operation efficiency under the condition of ensuring the running gap.

[0043] The pump body 1 adopts a horizontal center support mode and is connected with the base 10 through bolts. Figure 1 The ring suction type structure of the pump cover 6 comprises a pump cover body 601 and a streamlined transition surface 602 integrated with the pump cover body 601, and the pump cover body 601 is fixed on the bearing body part 9 through screws. In the high-temperature state, the pump body 1 and the pump cover 6 expand uniformly along the horizontal center, effectively solving the damage of the deformation of the pump body 1 in the high-temperature state to the rotating parts such as the double-suction impeller 4 and the pump shaft 5, and effectively improving the operation reliability of the pump set in the high-temperature state.

[0044] The utility model discloses a compact and efficient end suction double-channel double volute pump body of equal parameters of double suction impeller and complete new design, solve the axial and radial load balance problem when pump set operation, axial force and radial force self -balancing when pump set operation, and adopt double suction design to reduce cavitation ratio revolution, reduce the risk of cavitation due to fluid saturated steam pressure too low under high temperature state, and water pump radial size reduces significantly, and the processing cost of manufacture effectively reduces.

[0045] The utility model discloses the inside of impeller cover plate adopts special expansion design, effectively reduced the inside particle of medium to the scour of pump body flow channel and impeller cover plate, and the end face of pump body volute adopts special interior spiral and convex structure, and it is used with impeller, effectively reduced the inside particle of medium to the scour of pump body flow channel and impeller cover plate.

[0046] The utility model discloses pump body sealing ring and impeller import sealing ring part adopt multi -thread reverse screw groove design, under the guarantee operation clearance condition, effectively promoted the throttling effect, improved the pump operation efficiency.

[0047] The utility model discloses the end of impeller import design has spiral groove, solved the solid particle and impurity in the accumulation of impeller import, prevent silt and other impurities to enter the dynamic static clearance of sealing ring, in reducing the impurity to the scour of sealing ring and impeller, improved the operation reliability.

[0048] The utility model discloses pump body horizontal center support mode design, and pump cover adopts annular suction type design mode, solved the uneven problem of deformation under high temperature state, effectively improved the operation reliability of pump set under high temperature state

[0049] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high flow, abrasion resistant, high temperature, side suction, double suction pump characterized by: The large-flow erosion-resistant high-temperature end-suction double-suction pump comprises a pump body, a double-suction impeller, a pump shaft, a pump cover, a sealing component, a bearing body component and a base; The pump suction inlet is in a horizontal direction, and the discharge outlet is in a vertical direction; the pump suction inlet is provided with a shunt flow channel for separating the suction inlet; the shunt flow channel separates the impeller suction inlet into a first impeller suction inlet and a second impeller suction inlet; The inner side of the cover plate of the double-suction impeller is provided with a gradually expanding port, and the end surface of the volute of the pump body is provided with an internal spiral structure and a protruding structure; A sealing ring is arranged between the pump body and the double-suction impeller; a plurality of reverse screw grooves are arranged at the position where the pump body and the sealing ring are in contact, and the screw direction of the reverse screw grooves is opposite to the rotation direction of the double-suction impeller; The pump cover adopts an annular suction type structure; the pump cover is fixed on the bearing body component; the large-flow erosion-resistant high-temperature end-suction double-suction pump further comprises a flushing component which is installed outside the pump body and connected with the sealing component and the pump outlet; The pump body is supported by a horizontal support column at the center of the bottom of the pump body; the horizontal support column is fixed on the base.

2. The high flow, erosion resistant, high temperature, single stage, single suction pump of claim 1, wherein: The horizontal support column is connected with the base by bolts.

3. The high flow, erosion resistant, high temperature, single stage, single suction pump of claim 1, wherein: The annular suction type structure of the pump cover comprises a pump cover body and a streamlined transition surface which is integrated with the pump cover body.

4. The high flow, erosion resistant, high temperature, single stage, single suction pump of claim 1, wherein: The pump cover body is fixed on the bearing body component by screws.

5. The high flow, erosion resistant, high temperature, single stage, single suction pump of claim 1, wherein: The double-suction impeller is a double-suction impeller with the same area of the front cover plate and the rear cover plate.

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