Efficient double-support vertical axially split pump device with built-in bearing

Abstract

The invention relates to the technical field of vertical axially split pumps, in particular to a built-in bearing efficient double-support vertical axially split pump device which comprises a pump shell, a built-in bearing is arranged in the pump shell so as to support one end of a rotating shaft extending into the pump shell through the built-in bearing, and the other end of the rotating shaft penetrates out of the pump shell. The motor is arranged outside the pump shell; and an impeller is arranged on the rotating shaft and is rotationally matched in the pump shell. According to the efficient double-support vertical axially split pump device with the built-in bearing, the built-in bearing is arranged in the pump shell, the end, stretching into the pump shell, of the rotating shaft is supported through the built-in bearing, the axial size can be reduced, an independent bearing body can be omitted, the number of shaft seals can be reduced, the running stability of the rotor can be improved, and the product cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of vertical split case pumps, and more particularly to a vertical split case pump device with built-in bearings and high efficiency and double supports. Background Art

[0002] The vertical split case pump is a vertical installation structure that uses the rotation of the impeller to make the water centrifugal to work. Before starting the water pump, the pump casing and the water suction pipe must be filled with water, and then the motor is started to make the pump shaft drive the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing.

[0003] Both ends of the rotating shaft of the vertical split-center pump device in the prior art extend out of the pump casing, and a shaft sealing system must be arranged between both ends of the rotating shaft and the pump casing, which leads to the complex structure, large axial dimension, low rotor operation stability and high device finished product of the existing vertical split-center pump device; for example, a vertical split-center double-suction pump with patent number CN201120172574.9 comprises a base, a pump body and a pump shaft, a pump body is installed on the base, a pump chamber is arranged in the pump body, the pump shaft passes through the pump body, an impeller is installed on the pump shaft in the middle of the pump chamber, an upper and a lower sleeve are respectively mounted on the upper and lower ends of the impeller on the pump shaft, a sealing packing is arranged between the upper sleeve and the pump body, the upper end of the sealing packing is pressed by a sealing gland, an upper pump cover is installed on the upper end of the sealing gland, a self-aligning bearing is installed between the pump cover and the pump shaft, a water-guide bearing is mounted between the lower sleeve and the pump body, a bracket is installed on the upper end of the pump cover, the bracket and both ends of the base are tightened by fixing members, a motor is installed on the upper end of the bracket, and the motor shaft is fixed to the end of the pump shaft. The pump shaft of the pump passes through the pump body, and shaft sealing systems are required at both ends of the pump shaft. The structure is complex, the axial size is large, the rotor operation stability is low, and the device finished product is high. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above-mentioned problems, the present invention provides a vertical split-case pump device with an internal bearing and high efficiency and double support, comprising a pump casing, in which an internal bearing is installed, so as to support one end of a rotating shaft extending into the pump casing through the internal bearing, and the other end of the rotating shaft passes through the pump casing and is connected to a motor installed outside the pump casing; an impeller is provided on the rotating shaft, and the impeller rotates and fits in the pump casing.

[0006] Optionally, the built-in bearing is a ceramic rolling bearing.

[0007] Optionally, a mechanical seal is installed at the connection between the rotating shaft and the pump casing.

[0008] Optionally, the mechanical seal includes a pair of shaft sealing devices, and the end surfaces of the pair of shaft sealing devices are arranged perpendicular to the rotating shaft for relative sliding, so as to fit on the rotating shaft under the action of fluid pressure and the elastic force of the compensation mechanism.

[0009] Optionally, the motor is mounted on the pump casing via a motor frame.

[0010] Optionally, the described kind of high-efficiency double-support vertical split pump device with built-in bearings also includes a shaft sealing mechanism arranged at the connection between the rotating shaft and the pump casing, the shaft sealing mechanism including a shaft sealing body, the shaft sealing body consisting of an inner conical ring, an annular connecting seat and an annular tube; the small diameter end of the inner conical ring is tightly fitted on the rotating shaft to seal the sealing fluid in the pump casing; the large diameter end of the inner conical ring is fixed on the inner ring surface of the annular connecting seat, and the outer ring surface of the annular connecting seat is fixed on the tube surface of the annular tube; the annular connecting seat and the annular tube are both fixed on the inner side surface of the shaft seal outer casing; a trapezoidal annular groove-shaped high-pressure pressure-bearing side is formed between the outer side surface of the inner conical ring, the annular connecting seat and the annular tube, and a trapezoidal annular groove-shaped low-pressure pressure-bearing side is formed between the inner side surface of the inner conical ring, the annular connecting seat and the rotating shaft.

[0011] Optionally, the shaft sealing mechanism also includes a sliding ring and a conical extrusion cylinder fixed on the inner end of the sliding ring, the sliding ring slides on the inner ring surface of the shaft sealing shell, the inner end of the sliding ring is fixedly connected to the end of the large diameter of the conical extrusion cylinder, and the end of the small diameter of the conical extrusion cylinder seals and slides on the outer ring surface of the inner conical ring; the inner ends of multiple push-pull horizontal shafts are evenly fixed around the sliding ring, and the middle parts of the multiple push-pull horizontal shafts seal and slide in the through holes of the annular connecting seat and the through holes of the outer end cover of the shaft sealing shell; the outer ends of the multiple push-pull horizontal shafts are fixed with limit rings, and the limit rings are blocked on the outside of the outer end cover of the shaft sealing shell; a compression spring is sleeved on each push-pull horizontal shaft, one end of the compression spring is fixed on the sliding ring, and the other end of the compression spring is fixed on the spring seat, and the spring seat is fixed on the inner ring surface of the shaft sealing shell.

[0012] Optionally, a lubricant storage chamber is formed between the sliding ring, the shaft seal housing, the annular tube, the annular connecting seat, the inner conical ring and the conical extrusion cylinder; a lubricant adding chamber is formed between the inner conical ring, the shaft seal housing and the rotating shaft; the lubricant storage chamber is communicated with the inner end of a liquid inlet pipe arranged on the shaft seal housing, and the outer end of the liquid inlet pipe is connected and communicated with a lubricant storage tank, and a one-way valve is installed in the liquid inlet pipe to allow the lubricant in the lubricant storage tank to be transported unidirectionally to the lubricant storage chamber; a plurality of one-way infusion holes perpendicular to the rotating shaft are evenly arranged around the middle of the inner conical ring, so that the lubricant in the lubricant storage chamber is transported to the lubricant adding chamber through the one-way infusion holes under the extrusion action of the sliding ring and the conical extrusion cylinder, so as to lubricate the inner side surface of the inner conical ring and the rotating shaft.

[0013] Optionally, multiple transmission racks are fixed on the limiting ring, the rack teeth at the lower ends of the multiple transmission racks are meshed with multiple gears, and the multiple gears rotate evenly on the outer side of the outer end cover of the shaft seal housing; the lower ends of the multiple gears are meshed with the rack teeth at the upper ends of multiple driven racks; the multiple driven racks are fixed on the linkage ring, and the linkage ring is fixed to the outer ends of the multiple linkage shafts. The middle parts of the multiple linkage shafts are sealed and slide in the through holes of the outer end cover of the shaft seal housing, and the inner ends of the multiple linkage shafts are fixed with a conical top pressure ring without a cone tip, and the conical top pressure ring seals and slides on the inner ring surface of the inner conical ring to squeeze the lubricating liquid in the lubricating liquid adding cavity to the connection between the inner side surface of the inner conical ring and the rotating shaft, and perform a close top pressure on the inner side surface of the inner conical ring away from the rotating shaft.

[0014] Optionally, the end of the inner conical ring close to the rotating shaft is made of thermoplastic elastic material, and the end of the inner conical ring away from the rotating shaft is made of hard corrosion-resistant material; the conical top pressure ring is tightly pressed on the end of the inner conical ring away from the rotating shaft, and the conical top pressure ring is made of thermoplastic elastic material.

[0015] The limit ring slides in the middle of the transverse screw, one end of the transverse screw is fixed on the outer end cover of the shaft seal housing, and the other end of the transverse screw is fixed to the outer stopper; the transverse screw is threadedly connected with a limit nut, and the limit nut is located between the limit ring and the outer end cover of the shaft seal housing.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] The present invention discloses a vertical split-center pump device with built-in bearings and high efficiency double supports. A built-in bearing is installed in the pump housing to support one end of the rotating shaft extending into the pump housing through the built-in bearing, which can reduce the axial size, eliminate the independent bearing body, and reduce the number of shaft seals, which is beneficial to improving the running stability of the rotor and reducing the product cost; the ceramic rolling bearing is built-in in the pump housing, and no separate bearing body component is required. The shaft seal system also only requires one set, which simplifies the structure and equipment. The ceramic rolling bearing can play a good supporting role on the rotating shaft, and can keep the shaft system in a normal working position, and improve the rotation accuracy during operation; the built-in bearing in the pump housing can effectively reduce the axial length and bearing span of the pump body, and can improve the supporting strength of the shaft system; only the shaft seal mechanism needs to be configured on one side of the extended end of the rotating shaft, and the bearing is lubricated and cooled by cleaning and normal temperature medium, which reduces the maintenance work of filling lubricating oil during operation, and the installation method is vertical, which occupies a small area.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 The overall schematic diagram provided for the embodiment of the present invention Figure 1 ;

[0021] Figure 2 The overall schematic diagram provided for the embodiment of the present invention Figure 2 ;

[0022] Figure 3 Schematic diagram of the structure of the shaft sealing mechanism provided in the embodiment of the present invention Figure 1 ;

[0023] Figure 4 Schematic diagram of the structure of the shaft sealing mechanism provided in the embodiment of the present invention Figure 2 ;

[0024] Figure 5 A cross-sectional view of a shaft sealing mechanism provided by an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the structure of a shaft seal body provided in an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the structure of a shaft seal housing provided in an embodiment of the present invention;

[0027] Figure 8 A schematic diagram of the partial structure of a shaft sealing mechanism provided in an embodiment of the present invention.

[0028] Icons: pump housing 1; built-in bearing 2; rotating shaft 3; shaft sealing mechanism 4; shaft sealing body 5; inner conical ring 501; annular connecting seat 502; annular tube 503; sliding ring 6; conical extrusion cylinder 7; shaft sealing shell 8; push-pull horizontal axis 9; limiting ring 10; compression spring 11; spring seat 12; lubricating liquid storage chamber 13; lubricating liquid adding chamber 14; liquid inlet pipe 15; one-way infusion hole 16; transmission rack 17; gear 18; driven rack 19; linkage ring 20; linkage shaft 21; conical top pressure ring 22; horizontal screw 23; outer stopper 24; limiting nut 25. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0031] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0032] The following is combined with Figure 1-8 The present invention is described in further detail.

[0033] Embodiment 1

[0034] like Figure 1-8 As shown, a high-efficiency double-support vertical split-case pump device with built-in bearings includes a pump casing 1, in which a built-in bearing 2 is installed to support one end of a rotating shaft 3 extending into the pump casing 1 through the built-in bearing 2, and the other end of the rotating shaft 3 passes through the pump casing 1 and is connected to a motor installed outside the pump casing 1; an impeller is provided on the rotating shaft 3, and the impeller rotates and fits in the pump casing 1.

[0035] The working principle and beneficial effects of the above technical solution are:

[0036] The present invention discloses a vertical split-case pump device with built-in bearings and high efficiency and double supports. When the motor is working, the motor starts to drive the rotating shaft 3 to rotate. When the rotating shaft 3 rotates, the impeller is driven to rotate in the pump casing 1, thereby realizing pumping operation. A built-in bearing 2 is installed in the pump casing 1 to support one end of the rotating shaft 3 extending into the pump casing 1 through the built-in bearing 2, which can reduce the axial dimension, eliminate the independent bearing body, and reduce the number of shaft seals, which is beneficial to improving the running stability of the rotor and reducing the product cost. The built-in bearing 2 is built into the pump casing 1, and no separate bearing body component is required. The shaft sealing system also only requires one set, which simplifies the structure and equipment. The built-in bearing 2 in the pump casing 1 can effectively reduce the axial length and bearing span of the pump body, and can improve the supporting strength of the shaft system. The pump casing 1 only needs to be equipped with a shaft sealing system on one side of the protruding end of the rotating shaft 3. The bearing is lubricated and cooled by cleaning and normal temperature medium, which reduces the maintenance work of filling lubricating oil during operation. The installation method is vertical and occupies a small area.

[0037] The built-in bearing 2 is a ceramic rolling bearing, which can provide good support for the rotating shaft 3 and enable the shaft system to be in a normal working position, thereby improving the rotation accuracy during operation.

[0038] A mechanical seal is installed at the connection between the rotating shaft 3 and the pump housing 1.

[0039] The mechanical seal comprises a pair of shaft sealing devices, which are arranged perpendicular to the rotating shaft 3 and slide relative to each other so as to fit on the rotating shaft 3 under the action of fluid pressure and the elastic force of the compensation mechanism, and have good sealing performance.

[0040] The motor is mounted on the pump housing 1 via a motor frame, and a shock-absorbing rubber gasket is arranged between the motor and the motor frame to reduce the influence of vibration on the pump housing 1 when the motor is running.

[0041] Embodiment 2

[0042] like Figure 1-8 As shown, the described kind of high-efficiency double-support vertical split pump device with built-in bearings also includes a shaft sealing mechanism 4 arranged at the connection between the rotating shaft 3 and the pump casing 1, and the shaft sealing mechanism 4 includes a shaft sealing body 5, and the shaft sealing body 5 is composed of an inner conical ring 501, an annular connecting seat 502 and an annular tube 503; the small diameter end of the inner conical ring 501 is tightly fitted on the rotating shaft 3 to seal the sealing fluid in the pump casing 1; the large diameter end of the inner conical ring 501 is fixed on the inner ring surface of the annular connecting seat 502, and the outer ring surface of the annular connecting seat 502 is fixed on the tube surface of the annular tube 503; the annular connecting seat 502 and the annular tube 503 are both fixed on the inner side surface of the shaft seal housing 8; a high-pressure pressure-bearing side in the shape of a trapezoidal annular groove is formed between the outer side surface of the inner conical ring 501, the annular connecting seat 502 and the annular tube 503, and a low-pressure pressure-bearing side in the shape of a trapezoidal annular groove is formed between the inner side surface of the inner conical ring 501, the annular connecting seat 502 and the rotating shaft 3.

[0043] The working principle and beneficial effects of the above technical solution are:

[0044] The described high-efficiency double-support vertical split-center pump device with built-in bearings can be used to seal the sealing fluid in the pump casing 1 by fitting it on the rotating shaft 3 through the small-diameter end of the inner tapered ring 501, so as to prevent the sealing fluid in the pump casing 1 from flowing out through the connection between the rotating shaft 3 and the pump casing 1. A high-pressure pressure-bearing side in the shape of a trapezoidal annular groove is formed between the outer side surface of the inner tapered ring 501, the annular connecting seat 502 and the annular tube 503. When the pressure of the sealing fluid in the pump casing 1 increases, the pressure of the sealing fluid on the high-pressure pressure-bearing side increases, so that the small-diameter end of the inner tapered ring 501 is effectively fitted on the rotating shaft 3, which can improve the tightness of the inner tapered ring 501 pressed against the rotating shaft 3, and the sealing performance is relatively excellent. The inner tapered ring 501 can be made of resin, and can be deformed to a certain extent when the pressure increases, so as to be more tightly fitted on the rotating shaft 3 and improve the sealing effect; the inner tapered ring 501 can also be made of corrosion-resistant material to prevent excessive corrosion due to long-term contact with the sealing fluid.

[0045] Embodiment 3

[0046] like Figure 1-8As shown, the shaft sealing mechanism 4 also includes a sliding ring 6 and a conical extrusion cylinder 7 fixed on the inner end of the sliding ring 6, the sliding ring 6 slides on the inner ring surface of the shaft sealing shell 8, the inner end of the sliding ring 6 is fixedly connected to the end of the large diameter of the conical extrusion cylinder 7, and the end of the small diameter of the conical extrusion cylinder 7 is sealed and slides on the outer ring surface of the inner conical ring 501; the inner ends of multiple push-pull horizontal shafts 9 are evenly fixed around the sliding ring 6, and the middle parts of the multiple push-pull horizontal shafts 9 are sealed and slide in the through holes of the annular connecting seat 502 and the through holes of the outer end cover of the shaft sealing shell 8; the outer ends of the multiple push-pull horizontal shafts 9 are fixed with a limit ring 10, and the limit ring 10 is blocked on the outer side of the outer end cover of the shaft sealing shell 8; each push-pull horizontal shaft 9 is sleeved with a compression spring 11, one end of the compression spring 11 is fixed on the sliding ring 6, and the other end of the compression spring 11 is fixed on the spring seat 12, and the spring seat 12 is fixed on the inner ring surface of the shaft sealing shell 8.

[0047] The working principle and beneficial effects of the above technical solution are:

[0048] In the described built-in bearing high-efficiency double-support vertical split pump device, a sliding ring 6 and a tapered extrusion cylinder 7 fixed to the inner end of the sliding ring 6 are provided. When the pressure of the sealing fluid in the pump housing 1 increases, the pressure exerted by the sealing fluid on the sliding ring 6 increases, and the sliding ring 6 moves toward the inner tapered ring 501 on the inner ring surface of the shaft seal housing 8. When the sliding ring 6 moves, it compresses the multiple compression springs 11 and drives the end of the tapered extrusion cylinder 7 with a small diameter to slide on the outer ring surface of the inner tapered ring 501 in a sealed manner, thereby exerting a certain pressure on the inner tapered ring 501 through the tapered extrusion cylinder 7. The pressure makes the inner conical ring 501 fit more tightly on the rotating shaft 3, thereby improving the sealing performance; when the sliding ring 6 moves, it drives the multiple push-pull horizontal shafts 9 to slide in the through holes of the annular connecting seat 502 and the through holes of the outer end cover of the shaft seal housing 8. The multiple push-pull horizontal shafts 9 can play a good guiding and limiting role. When the sealing fluid pressure in the pump housing 1 becomes smaller, the pressure generated by the sealing fluid on the sliding ring 6 becomes smaller, and the sliding ring 6 is reset under the elastic force of the multiple compression springs 11. The sliding ring 6 moves on the inner ring surface of the shaft seal housing 8 in the direction away from the inner conical ring 501 and returns to its original position.

[0049] Embodiment 4

[0050] like Figure 1-8As shown, a lubricant storage chamber 13 is formed between the sliding ring 6, the shaft seal housing 8, the annular tube 503, the annular connecting seat 502, the inner conical ring 501 and the conical extrusion cylinder 7; a lubricant adding chamber 14 is formed between the inner conical ring 501, the shaft seal housing 8 and the rotating shaft 3; the lubricant storage chamber 13 is communicated with the inner end of the liquid inlet pipe 15 arranged on the shaft seal housing 8, and the outer end of the liquid inlet pipe 15 is connected and communicated with the lubricant storage tank, and a one-way valve is installed in the liquid inlet pipe 15 to allow the lubricant in the lubricant storage tank to be unidirectionally transported into the lubricant storage chamber 13; a plurality of one-way infusion holes 16 perpendicular to the rotating shaft 3 are evenly arranged around the middle of the inner conical ring 501, so that the lubricant in the lubricant storage chamber 13 is transported to the lubricant adding chamber 14 through the one-way infusion holes 16 under the extrusion action of the sliding ring 6 and the conical extrusion cylinder 7, so as to lubricate the inner side surface of the inner conical ring 501 and the rotating shaft 3.

[0051] The working principle and beneficial effects of the above technical solution are:

[0052] In the described high-efficiency double-support vertical split-center pump device with built-in bearing, a lubricating liquid storage chamber 13 is formed between the sliding ring 6, the shaft seal housing 8, the annular tube 503, the annular connecting seat 502, the inner conical ring 501 and the conical extrusion cylinder 7; the lubricating liquid can be unidirectionally transported into the lubricating liquid storage chamber 13 through the liquid inlet pipe 15. When the sealing fluid pressure in the pump housing 1 increases, the lubricating liquid in the lubricating liquid storage chamber 13 is transported to the lubricating liquid adding chamber 14 through the unidirectional liquid infusion hole 16 under the extrusion action of the sliding ring 6 and the conical extrusion cylinder 7, so as to conduct lubrication to the inner side surface of the inner conical ring 501 and the rotating shaft 3. Lubrication treatment is performed to increase the input amount of lubricating liquid when the inner side surface of the inner conical ring 501 and the rotating shaft 3 are more tightly fitted, thereby improving the lubrication effect and ensuring the normal operation of the rotating shaft 3; when the sealing fluid pressure in the pump housing 1 becomes smaller, the sliding ring 6 is reset under the elastic force of multiple compression springs 11, and the sliding ring 6 moves on the inner ring surface of the shaft seal housing 8 in the direction away from the inner conical ring 501. At this time, negative pressure is formed in the lubricating liquid storage chamber 13. After the one-way valve installed in the liquid inlet pipe 15 is opened, the lubricating liquid in the lubricating liquid storage tank can be pumped into the lubricating liquid storage chamber 13.

[0053] Embodiment 5

[0054] like Figure 1-8As shown, a plurality of transmission racks 17 are fixed on the limit ring 10, and the rack teeth at the lower ends of the plurality of transmission racks 17 are meshed with a plurality of gears 18, and the plurality of gears 18 uniformly rotate around on the outer side of the outer end cover of the shaft seal housing 8; the lower ends of the plurality of gears 18 are meshed with the rack teeth at the upper ends of the plurality of driven racks 19; the plurality of driven racks 19 are fixed on the linkage ring 20, and the linkage ring 20 is fixed on the outer ends of a plurality of linkage shafts 21, and the middle parts of the plurality of linkage shafts 21 are sealed and slide in the through holes of the outer end cover of the shaft seal housing 8, and a conical top pressure ring 22 without a cone tip is fixed on the inner ends of the plurality of linkage shafts 21, and the conical top pressure ring 22 is sealingly slid on the inner ring surface of the inner conical ring 501, so as to squeeze the lubricating liquid in the lubricating liquid adding cavity 14 to the connection between the inner side surface of the inner conical ring 501 and the rotating shaft 3, and perform a close top pressure on the inner side surface of the inner conical ring 501 away from the rotating shaft 3.

[0055] The working principle and beneficial effects of the above technical solution are:

[0056] In the described built-in bearing high-efficiency double-support vertical split pump device, when the sealing fluid pressure in the pump casing 1 increases, the sliding ring 6 moves on the inner ring surface of the shaft seal housing 8 toward the inner conical ring 501, thereby driving the limit ring 10 to move away from the shaft seal housing 8 through multiple push-pull horizontal shafts 9. At this time, the limit ring 10 drives the multiple transmission racks 17 to move outward. When the multiple transmission racks 17 move outward, they mesh with the multiple gears 18 to rotate, and the rotation of the multiple gears 18 drives the multiple driven racks 19 to move toward the direction of the shaft seal housing 8. 19 cooperates with the linkage ring 20 and multiple linkage shafts 21 to drive the conical top pressure ring 22 to slide in a sealed manner on the inner ring surface of the inner conical ring 501, and squeezes the lubricating liquid in the lubricating liquid adding chamber 14 to the connection between the inner side surface of the inner conical ring 501 and the rotating shaft 3, thereby improving the lubrication effect. In addition, the outer side surface of the inner conical ring 501 is subjected to the pressure of the sealing fluid and the pressure of the conical extrusion cylinder 7, and the inner side surface of the inner conical ring 501 is subjected to the pressure of the conical top pressure ring 22, and the two-way extrusion further forms a better sealing structure between the inner conical ring 501 and the conical top pressure ring 22, thereby improving the sealing effect of the present invention.

[0057] The end of the inner conical ring 501 close to the rotating shaft 3 is made of thermoplastic elastic material, and the end of the inner conical ring 501 away from the rotating shaft 3 is made of hard corrosion-resistant material; the conical top pressure ring 22 is tightly pressed on the end of the inner conical ring 501 away from the rotating shaft 3, and the conical top pressure ring 22 is made of thermoplastic elastic material, so that it can be deformed under pressure, thereby improving the sealing performance.

[0058] Embodiment 6

[0059] like Figure 1-8As shown, the limit ring 10 slides in the middle of the transverse screw 23, one end of the transverse screw 23 is fixed on the outer end cover of the shaft seal housing 8, and the other end of the transverse screw 23 is fixed to the outer stopper 24; the transverse screw 23 is threadedly connected with a limit nut 25, and the limit nut 25 is located between the limit ring 10 and the outer end cover of the shaft seal housing 8.

[0060] The working principle and beneficial effects of the above technical solution are:

[0061] In the described kind of high-efficiency double-support vertical split-center pump device with built-in bearings, a limiting nut 25 is arranged on the transverse screw 23, and the connection position between the limiting nut 25 and the transverse screw 23 can be changed by rotating the limiting nut 25, thereby adjusting the relative position of the transverse screw 23 and the limiting ring 10, and limiting the position, and finally adjusting the position of the small-diameter end of the conical extrusion cylinder 7 to be squeezed and fitted on the outer ring surface of the inner conical ring 501, and the position of the conical top pressure ring 22 to be pressed on the inner ring surface of the inner conical ring 501, and the adjustment is very convenient.

[0062] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A high-efficiency double-support vertical split-case pump device with built-in bearings, characterized in that: The invention comprises a pump casing (1), wherein a built-in bearing (2) is installed in the pump casing (1) so as to support one end of a rotating shaft (3) extending into the pump casing (1) through the built-in bearing (2); the other end of the rotating shaft (3) passes through the pump casing (1) and is connected to a motor installed outside the pump casing (1); an impeller is provided on the rotating shaft (3), and the impeller is rotatably fitted in the pump casing (1).

2. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 1 is characterized in that: The built-in bearing (2) is a ceramic rolling bearing.

3. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 1 is characterized in that: A mechanical seal is installed at the connection between the rotating shaft (3) and the pump casing (1).

4. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 3 is characterized in that: The mechanical seal comprises a pair of shaft sealing devices, which are arranged perpendicular to the rotating shaft (3) with relatively sliding end faces so as to fit on the rotating shaft (3) under the action of fluid pressure and the elastic force of the compensation mechanism.

5. The high-efficiency double-support vertical split case pump device with built-in bearings according to claim 1 is characterized in that: The motor is mounted on the pump casing (1) via a motor frame.

6. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 1, characterized in that: The pump also comprises a shaft sealing mechanism (4) arranged at the connection between the rotating shaft (3) and the pump housing (1), the shaft sealing mechanism (4) comprising a shaft sealing body (5), the shaft sealing body (5) being composed of an inner conical ring (501), an annular connecting seat (502) and an annular tube (503); the small diameter end of the inner conical ring (501) is tightly fitted on the rotating shaft (3) to seal the sealing fluid in the pump housing (1); the large diameter end of the inner conical ring (501) is fixed on the inner ring surface of the annular connecting seat (502) The outer ring surface of the annular connecting seat (502) is fixed on the tube surface of the annular tube (503); the annular connecting seat (502) and the annular tube (503) are both fixed on the inner side surface of the shaft seal housing (8); a high-pressure pressure-bearing side in the shape of a trapezoidal annular groove is formed between the outer side surface of the inner conical ring (501), the annular connecting seat (502) and the annular tube (503); and a low-pressure pressure-bearing side in the shape of a trapezoidal annular groove is formed between the inner side surface of the inner conical ring (501), the annular connecting seat (502) and the rotating shaft (3).

7. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 6, characterized in that: The shaft sealing mechanism (4) also includes a sliding ring (6) and a conical extrusion cylinder (7) fixed to the inner end of the sliding ring (6); the sliding ring (6) slides on the inner ring surface of the shaft sealing shell (8); the inner end of the sliding ring (6) is fixedly connected to the end of the conical extrusion cylinder (7) with a large diameter; the end of the conical extrusion cylinder (7) with a small diameter seals and slides on the outer ring surface of the inner conical ring (501); the inner ends of a plurality of push-pull horizontal shafts (9) are evenly fixed around the sliding ring (6); the middle parts of the plurality of push-pull horizontal shafts (9) are sealed and slide. In the through-hole of the annular connecting seat (502) and the through-hole of the outer end cover of the shaft seal housing (8); a limiting ring (10) is fixed at the outer end of a plurality of push-pull transverse shafts (9), and the limiting ring (10) is blocked on the outer side of the outer end cover of the shaft seal housing (8); a compression spring (11) is sleeved on each push-pull transverse shaft (9), one end of the compression spring (11) is fixed on the sliding ring (6), and the other end of the compression spring (11) is fixed on the spring seat (12), and the spring seat (12) is fixed on the inner ring surface of the shaft seal housing (8).

8. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 7, characterized in that: A lubricating liquid storage chamber (13) is formed between the sliding ring (6), the shaft seal housing (8), the annular tube (503), the annular connecting seat (502), the inner conical ring (501) and the conical extrusion cylinder (7); a lubricating liquid adding chamber (14) is formed between the inner conical ring (501), the shaft seal housing (8) and the rotating shaft (3); the lubricating liquid storage chamber (13) is communicated with the inner end of a liquid inlet pipe (15) provided on the shaft seal housing (8), and the outer end of the liquid inlet pipe (15) is connected and communicated with a lubricating liquid storage tank, and the liquid inlet pipe (15) is connected to the lubricating liquid storage tank. A one-way valve is installed in the tube (15) so that the lubricating liquid in the lubricating liquid storage tank is transported in one direction to the lubricating liquid storage chamber (13); a plurality of one-way liquid infusion holes (16) perpendicular to the rotating shaft (3) are evenly arranged around the middle of the inner conical ring (501) so that the lubricating liquid in the lubricating liquid storage chamber (13) is transported to the lubricating liquid adding chamber (14) through the one-way liquid infusion holes (16) under the extrusion action of the sliding ring (6) and the conical extrusion cylinder (7), so as to lubricate the inner side surface of the inner conical ring (501) and the rotating shaft (3).

9. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 8, characterized in that: A plurality of transmission racks (17) are fixed on the limiting ring (10); the rack teeth at the lower ends of the plurality of transmission racks (17) mesh with a plurality of gears (18); the plurality of gears (18) evenly rotate around the outer surface of the outer end cover of the shaft seal housing (8); the lower ends of the plurality of gears (18) mesh with the rack teeth at the upper ends of a plurality of driven racks (19); the plurality of driven racks (19) are fixed on the linkage ring (20); the linkage ring (20) is fixed on the outer ends of a plurality of linkage shafts (21); The middle part of the linkage shafts (21) is sealed and slid in the through hole of the outer end cover of the shaft seal housing (8), and the inner ends of the multiple linkage shafts (21) are fixed with a conical top pressure ring (22) without a cone tip. The conical top pressure ring (22) is sealed and slid on the inner ring surface of the inner conical ring (501) to squeeze the lubricating liquid in the lubricating liquid adding chamber (14) to the connection between the inner side surface of the inner conical ring (501) and the rotating shaft (3), and to perform a close top pressure on the inner side surface of the inner conical ring (501) away from the rotating shaft (3).

10. The high-efficiency double-support vertical split-case pump device with built-in bearings according to claim 9, characterized in that: The end of the inner conical ring (501) close to the rotating shaft (3) is made of a thermoplastic elastic material, and the end of the inner conical ring (501) away from the rotating shaft (3) is made of a hard corrosion-resistant material; the conical top pressure ring (22) is tightly pressed on the end of the inner conical ring (501) away from the rotating shaft (3), and the conical top pressure ring (22) is made of a thermoplastic elastic material.

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