Horizontal centrifugal pump with adjustable pump body and distance ratio between impeller and bearing

Abstract

The present invention discloses a horizontal centrifugal pump that realizes the telescopic transformation of the pump body structure and the adjustable spacing ratio between the impeller and the bearing. The centrifugal pump includes a pump body telescopic device, which divides the pump body into a left half pump body and a right half pump body, and adds a pump body telescopic propulsion rod and an annular pump body guide rail between the left half pump body and the right half pump body, and a dustproof sealing sleeve is arranged on the outer side of the annular pump body guide rail; and a connecting sleeve is slidably connected to the pump shaft and fixedly connected to the motor shaft, so that the pump body telescopic propulsion rod drives the right half pump body to slide axially relative to the left half pump body, thereby realizing the telescopic transformation of the pump body structure and the adjustable spacing ratio between the impeller and the bearing. The present invention realizes the telescopic transformation of the pump body through a simple structure, can change the volume of the pump body under different use conditions, is convenient for transportation and installation, saves transportation costs, and can be installed and used in a small space, expanding the use occasions of the pump.

Description

Technical Field

[0001] The invention relates to the field of horizontal centrifugal pumps, and in particular to a horizontal centrifugal pump which can realize the expansion and contraction transformation of a pump body structure and the adjustable spacing ratio between an impeller and a bearing. Background Art

[0002] As the most widely used structural form of centrifugal pumps, the cantilever centrifugal pump has two support bearings of the rotor pump shaft located at one end of the pump shaft, and the impeller is installed at the other end of the pump shaft, in a free cantilever state. This special structure makes the comprehensive influence of its working state parameters (speed, external load) and actual structural parameters (cantilever length, support spacing, etc.) on the rotor dynamic characteristics more complicated, and its conventional pump body structure cannot be retracted and cannot be installed and used in some occasions. In view of the special structure of the cantilever centrifugal pump rotor, a horizontal centrifugal pump that can adjust the impeller and bearing spacing ratio under different working conditions is designed, which can enrich and develop the centrifugal pump design, and provide technical support for improving the stability of the centrifugal pump system and improving the centrifugal pump vibration research. In view of the large size of the conventional pump body, the large space occupied during mobile transportation, and the inability to install in some occasions due to the volume of the pump body, the realization of the pump body telescopic function can enable the centrifugal pump to perform its functions in a variety of spatial occasions and facilitate its transportation and installation. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention proposes a horizontal centrifugal pump that realizes the telescopic transformation of the pump body structure and the adjustable distance ratio between the impeller and the bearing. The specific technical solution is as follows:

[0004] A horizontal centrifugal pump that realizes pump body telescopic and adjustable distance ratio between impeller and bearing, the horizontal centrifugal pump comprising a pump body telescopic device; the pump body telescopic device comprises a left half pump body, a right half pump body, a motor shaft, a pump shaft, a connecting sleeve, an axial positioning telescope, a pump body telescopic propulsion rod, an annular pump body guide rail, a dustproof sealing sleeve, and a pump body base;

[0005] The annular pump body guide rail and the dustproof sealing sleeve are coaxially nested and installed at the right end of the left half pump body. The right half pump body is correspondingly provided with an annular groove. The right half pump body can slide along the annular pump body guide rail. The dustproof sealing sleeve is inserted into the annular groove on the right half pump body to prevent dust from the annular pump body guide rail.

[0006] The motor shaft and the pump shaft are fixedly installed through the connecting sleeve, and a plurality of convex grooves extending in the axial direction are provided on the surface of the pump shaft, and a concave groove is provided on the inner surface of the left end of the connecting sleeve, and the pump shaft can slide along the connecting sleeve through the cooperation of the convex groove and the concave groove; a plurality of holes are also provided on the convex groove of the pump shaft, and the axial positioning expansion joint is installed in the hole to perform axial positioning on the pump shaft;

[0007] There are multiple telescopic propulsion rods for the pump body, which are distributed in a ring shape. The driving part of the telescopic propulsion rods for the pump body is fixed inside the right half pump body, and the telescopic end of the telescopic propulsion rods for the pump body is connected to the right end of the left half pump body. The bottom of the right half pump body is supported by the pump body base, and rollers are installed on the pump body base. The telescopic propulsion rods for the pump body drive the right half pump body and the pump body base to slide along the annular pump body guide rail, thereby realizing the telescopic transformation of the pump body structure and the adjustable distance ratio between the impeller and the bearing.

[0008] Furthermore, the horizontal centrifugal pump also includes a cantilever adjustment device, which includes a bearing base telescopic propulsion rod, a left fixed plate of the bearing base, a middle sleeve of the bearing base, a right fixed plate of the bearing base, an annular base guide rail, a first bearing, a short shaft sleeve, a micro-sound wave transmitter, a micro-sound wave receiver, and a second bearing;

[0009] The bearing base has two telescopic propulsion rods, the driving part of which is fixedly connected to the inside of the left half of the pump body, and the telescopic end is fixedly connected to the left fixed plate of the bearing base; the left fixed plate of the bearing base, the middle sleeve of the bearing base, and the right fixed plate of the bearing base are installed together to form a bearing base, and the first bearing is installed inside the middle sleeve of the bearing base;

[0010] The annular base guide rail is installed inside the left half of the pump body and is connected with the outer track interface of the middle sleeve of the bearing base; the short shaft sleeve is installed on the pump shaft, and the installation position is located on the inner side of the bearing base; the pump shaft and the short shaft sleeve are installed at the position where a convex groove begins to be formed, and the short shaft sleeve is internally provided with a concave groove, and the convex groove and the concave groove cooperate to prevent the pump shaft from radial relative sliding and facilitate axial movement; the axial movement of the pump shaft is achieved by the telescopic propulsion rod of the bearing base in cooperation with the bearing base and the first bearing;

[0011] The micro-sonic wave transmitter is embedded in the fixed plate on the right side of the bearing base, and the micro-sonic wave receiver is integrated on the right half of the pump body; the second bearing is installed on the motor shaft and fixed by the right half of the pump body; the distance between the micro-sonic wave transmitter and the first bearing is equal to the distance between the micro-sonic wave receiver and the second bearing.

[0012] Furthermore, the horizontal centrifugal pump also includes a pump shaft lubrication device, which includes an annular spray device and a resistance sensor. The annular spray device includes an integrated oil storage tank, an oil pipeline and a nozzle. The oil storage tank is fixedly connected to the left or right side of the bearing base. The oil pipeline is annular and is located directly below the oil storage tank. The nozzles are arranged in a ring on the inner side of the oil pipeline. The nozzles are embedded in the end of the short shaft sleeve and contact the surface of the pump shaft.

[0013] Furthermore, there are two pump shaft lubrication devices, which are respectively located on both sides of the bearing base.

[0014] Furthermore, a plurality of holes are provided on the convex groove of the pump shaft, so that the axial positioning expansion joint can be positioned in different holes, thereby realizing a plurality of gear settings for axial positioning of the pump shaft.

[0015] The beneficial effects of the present invention are as follows:

[0016] (1) The present invention realizes the expansion and contraction of the pump body through a simple structure, which enables the pump body to change its volume under different usage conditions, facilitates transportation and installation, saves transportation costs, and can be installed and used in a small space, thereby expanding the use occasions of the pump.

[0017] (2) The present invention improves the bearing installation to achieve bearing position change and adjust the impeller-bearing spacing ratio. At the same time, a micro-acoustic sensor is used to measure the size of the impeller-bearing spacing ratio, and the time difference is used to reflect the size of the impeller-bearing spacing ratio. The method is simple and clear, easy to operate, and an automatic lubrication structure is designed to prevent the pump shaft from being damaged due to friction when adjusting the impeller-bearing spacing ratio, thereby increasing its service life.

[0018] (3) The present invention has low cost, small footprint, low noise, simple structure, convenient data collection, and can effectively reflect the ratio of the distance between the impeller and the bearing and adjust the size of the pump body. At the same time, the operation is intelligent, fast and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the pump structure.

[0020] Figure 2 It is a schematic diagram of the cantilever adjustment device assembly.

[0021] Figure 3 It is a schematic diagram of the assembly of the axial positioning expansion joint and the pump shaft.

[0022] Figure 4 It is a schematic diagram of the assembly of the pump body and the annular pump body guide rail.

[0023] Figure 5 It is a ring spray device.

[0024] In the figure, there are a telescopic propulsion rod 1 of a bearing base, an annular base guide rail 2, an annular spray device 3, a resistance sensor 4, a left fixed plate 5 of a bearing base, a middle sleeve 6 of a bearing base, a short shaft sleeve 7, a first bearing 8, a micro-sonic wave transmitter 9, a right fixed plate 10 of a bearing base, a dustproof sealing sleeve 11, an axial positioning telescope 12, a pump shaft 13, a connecting sleeve 14, a screw 15, a telescopic propulsion rod 16 of a pump body, a motor shaft 17, a second bearing 18, a micro-sonic wave receiver 19, a pump body base 20, a left half pump body 21, an annular pump body guide rail 22, a right half pump body 23, a hole groove 24, an oil storage tank 3-1, an oil pipeline 3-2, and an intelligent nozzle 3-3. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below based on the accompanying drawings and preferred embodiments, and the purpose and effects of the present invention will become more clear. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] like Figure 1 As shown, the present invention realizes the horizontal centrifugal pump with telescopic transformation of pump body structure and adjustable spacing ratio between impeller and bearing, and its functions are mainly realized through the cooperation of pump body telescopic device, cantilever adjustment device and pump shaft lubrication device.

[0027] Combination Figure 1 As shown, the pump body telescopic device includes a left half pump body 21, a right half pump body 23, a motor shaft 17, a pump shaft 13, a connecting sleeve 14, an axial positioning telescope 12, a pump body telescopic propulsion rod 16, an annular pump body guide rail 22, a dustproof sealing sleeve 11, and a pump body base 20.

[0028] Combination Figure 1 , Figure 3 , Figure 5As shown, in the pump body telescopic device, the right end of the left half pump body 21 is equipped with an annular pump body guide rail 22, and the right end of the annular pump body guide rail 22 is embedded in the right half pump body 23. At the same time, an observation window is opened on the side of the right half pump body 23 to facilitate the disassembly and installation of internal parts. The motor shaft 17 and the pump shaft 13 are fixed by the connecting sleeve 14. The interior of the connecting sleeve 14 is divided into two parts, the left half of the connecting sleeve 14 has a concave groove corresponding to the convex groove on the surface of the pump shaft 13, and the right half of the connecting sleeve 14 has a smooth surface. The surface of the motor shaft 17 is smooth and has a threaded hole. The surface of the pump shaft 13 is a convex groove, and a number of holes 24 are opened on the convex groove. The right half of the connecting sleeve 14 is fixed with the motor shaft 17 by screws 15, and the left half of the connecting sleeve 14 is connected with the pump shaft 13 by sliding through the concave and convex grooves. At the same time, the axial positioning expansion joint 12 is used for axial positioning, and the axial positioning is carried out by changing different holes and slots 24 for docking. There are several holes and slots 24 distributed on the pump shaft 13. The axial positioning expansion joint 12 is integrated above the connecting sleeve and fixed by screws. The telescopic state is controlled by wireless communication and used in conjunction with the hole and slot 24. The pump body telescopic propulsion rod 16 is annularly distributed with a total of 6 corresponding to 6 guide rails. The driving part of the pump body telescopic propulsion rod 16 is installed inside the right half pump body 23 by welding. The telescopic end of the pump body telescopic propulsion rod 16 is fixed to the right end cross mark of the left half pump body 21 by screws. The pump body telescopic propulsion rod 16 is a reciprocating push rod driven by a servo electric cylinder. The telescopic amount is set by wireless communication control. Each telescopic amount corresponds to an interval of the hole and slot 24 as a gear. The dustproof sealing sleeve 11 is fixedly connected to the right end of the left half pump body 21 by screws, and is connected to the right half pump body 23 in a sliding and sealing manner. Lubricating oil is used to achieve smooth movement. It is an annular sleeve structure, surrounding the connection between the left half pump body 21 and the right half pump body 23, and can achieve pump body sealing when the pump body is extended and retracted. The pump body base 20 is installed under the right half pump body 23 by screws to support the pump body, and the bottom thereof has a roller structure that can cooperate with the right half pump body 23 to move in a telescopic manner. The roller can be locked by an external matching roller lock to prevent the roller from rotating. When used in a fixed position and the telescopic function is not used, the roller can be locked by the roller lock to prevent sliding.

[0029] Pump body expansion and contraction realization method: combined Figure 1 , Figure 3 , Figure 5, turn off the centrifugal pump, control the telescopic rod of the axial positioning telescope 12 to retract, that is, withdraw from the hole groove 24, and then start the telescopic propulsion rod 16 of the pump body to retract, which is divided into several gears, corresponding to a certain number of hole grooves 24, set and change the gear of the pump body telescopic rod 16 (corresponding to an interval of different hole grooves 24), and the pump body propulsion telescopic rod 16 drives the position of the right half pump body 23 to change, including the right half pump body 23, the motor shaft 17, and the second bearing 18 moving together, that is, the relative position of the right half pump body 23 and the left half pump body 21 changes, and the dustproof sealing sleeve 11 and the pump body base 20 change with it. After the displacement is completed, that is, when it is switched to another gear, when the axial positioning telescope 12 corresponds to another hole groove 24, the pump body telescopic propulsion rod 16 stops working, and at this time, the axial positioning telescope 12 controller is opened to telescope the telescopic rod to make it dock with the hole groove 24 and complete axial fixation. At this time, the pump body is telescoped.

[0030] Combination Figure 1 , Figure 2 As shown, the cantilever adjustment device includes a bearing base telescopic propulsion rod 1, a left fixed plate 5 of the bearing base, a middle sleeve 6 of the bearing base, a right fixed plate 10 of the bearing base, an annular base guide rail 2, a first bearing 8, a short shaft sleeve 7, a micro-acoustic wave transmitter 9, a micro-acoustic wave receiver 19, and a second bearing 18.

[0031] Combination Figure 1 , Figure 2 and Figure 4 As shown, the telescopic push rod 1 of the bearing base is also a reciprocating push rod, driven by a servo electric cylinder, and its telescopic amount is set by wireless communication control. The main part of the telescopic push rod 1 of the bearing base is integrated and fixedly connected to the left half of the pump body 21, and is divided into two groups, the telescopic end of the telescopic push rod 1 of the bearing base is connected to the side of the left fixed plate 5 of the bearing base by screws, and is fixedly installed in the middle sleeve 6 of the bearing base in cooperation with the first bearing 8, and then fixed by the left fixed plate 5 of the bearing base and the right fixed plate 10 of the bearing base. The annular base guide rail 2 is installed in the left half of the pump body 21, and is connected with the outer track interface of the middle sleeve 6 of the bearing base. The guide rail form is the same as the annular pump body guide rail 22. The short shaft sleeve 7 is installed on the pump shaft 13 and is fixedly connected by a groove structure to prevent radial relative sliding and facilitate axial movement. The axial movement is achieved by the telescopic push rod 1 of the bearing base in cooperation with the bearing base and the first bearing 8, and the first bearing 8 and the short shaft sleeve 7 are fixed by interference fit. The micro-acoustic wave transmitter 9 is embedded in the fixed plate 10 on the right side of the bearing base, and the micro-acoustic wave receiver 19 is integrated and installed on the right half of the pump body 23. The distance between the micro-acoustic wave transmitter 9 and the first bearing 8 is equal to that between the micro-acoustic wave receiver 19 and the second bearing 18. The second bearing 18 is installed on the motor shaft 17 and fixed by the right half of the pump body 23.

[0032] Impeller-bearing spacing ratio adjustment method: The impeller-bearing spacing ratio is the ratio of the distance from the first bearing 8 to the impeller position 25 to the distance from the first bearing 8 to the second bearing 18.

[0033] Method 1: When adjusting the spacing ratio between the impeller and the bearing, first stop the centrifugal pump, start the telescopic propulsion rod 1 of the bearing base, and the telescopic propulsion rod 1 of the bearing base drives the bearing base (the left fixed plate 5 of the bearing base, the middle sleeve 6 of the bearing base, and the right fixed plate 10 of the bearing base) to move horizontally, so that the first bearing 8 and the short shaft sleeve 7 move horizontally through the groove structure on the pump shaft 13. After changing the position, the telescopic propulsion rod 1 of the bearing base stops working. At this time, the distance from the first bearing 8 to the impeller position 25 and the distance between the first bearing 8 and the second bearing 18 have changed, that is, the spacing ratio between the impeller and the bearing has changed. The change of the spacing ratio between the impeller and the bearing can be calculated by the micro-sound wave transmitter 9 and the micro-sound wave receiver 19, and the calculation method is as follows: start the sound wave transmitter and the micro-sound wave receiver 19, and calculate the distance l1 between the first bearing 8 and the second bearing 18 through time. At the same time, the total length l of the impeller position 25 and the second bearing 18 remains unchanged, and the spacing ratio between the impeller and the bearing x = (l-l1) / l1.

[0034] Method 2: The cantilever transformation method can also be adjusted when the pump body is extended or retracted, that is, the distance from the first bearing 8 to the impeller position 25 is kept unchanged, that is, the bearing base telescopic propulsion rod 1 does not work, and the pump body is retracted at this time. The second bearing 18 is installed on the motor shaft 17 through an interference fit. When the pump body is extended or retracted, the motor shaft 17 and the second bearing 18 are displaced with the right half of the pump body 23. At this time, the distance between the first bearing 8 and the second bearing 18 has changed, and because the distance from the first bearing 8 to the impeller position 25 remains unchanged, the impeller and bearing spacing ratio has changed. The above two methods can also be operated simultaneously to adjust the impeller and bearing spacing ratio. After the adjustment is completed, it is only necessary to calculate the impeller and bearing spacing ratio through the micro-acoustic transmitter 9 and the micro-acoustic receiver 19.

[0035] Combination Figure 1 , Figure 2 , Figure 5The pump shaft lubrication device is mainly used to overcome the problem of excessive friction resistance between the short shaft sleeve 7 and the pump shaft 13 when the impeller and bearing spacing ratio changes. It is mainly divided into an annular spray device 3 and a resistance sensor 4. The annular spray device 3 is divided into an oil storage tank 3-1, an oil pipeline 3-2 and an intelligent nozzle 3-3, and the three are integrated together. The oil storage tank 3-1 is fixed to the side of the fixed plate 5 on the left side of the bearing base by screws. The oil pipeline 3-2 is annular and is located directly below the oil storage tank 3-1. The intelligent nozzle 3-3 is arranged in an annular shape inside. The intelligent nozzle is controlled by a programmable controller and works by receiving the resistance signal. The resistance sensor 4 is annular and embedded at both ends of the short shaft sleeve 7 to contact the surface of the pump shaft 13. When the induced resistance is too large, a signal is transmitted to the intelligent nozzle 3-3. The intelligent nozzle 3-3 receives the signal of excessive resistance and starts to work, spraying lubricating oil to lubricate the pump shaft 13. When the resistance decreases, the intelligent nozzle 3-3 receives the signal and stops working. It is divided into two groups, and the other group is on the side of the fixed plate 10 on the right side of the bearing base.

[0036] Those skilled in the art can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention is described in detail with reference to the above examples, those skilled in the art can still modify the technical solutions recorded in the above examples or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, etc. made within the spirit and principle of the invention shall be included in the protection scope of the invention.

Claims

1. A horizontal centrifugal pump that realizes the telescopic pump body and the adjustable distance ratio between the impeller and the bearing, characterized in that: The horizontal centrifugal pump comprises a pump body telescopic device; the pump body telescopic device comprises a left half pump body, a right half pump body, a motor shaft, a pump shaft, a connecting sleeve, an axial positioning telescope, a pump body telescopic propulsion rod, an annular pump body guide rail, a dustproof sealing sleeve, and a pump body base; The annular pump body guide rail and the dustproof sealing sleeve are coaxially nested and installed at the right end of the left half pump body. The right half pump body is correspondingly provided with an annular groove. The right half pump body can slide along the annular pump body guide rail. The dustproof sealing sleeve is inserted into the annular groove on the right half pump body to prevent dust from the annular pump body guide rail. The motor shaft and the pump shaft are fixedly installed through the connecting sleeve, and a plurality of convex grooves extending in the axial direction are provided on the surface of the pump shaft, and a concave groove is provided on the inner surface of the left end of the connecting sleeve, and the pump shaft can slide along the connecting sleeve through the cooperation of the convex groove and the concave groove; a plurality of holes are also provided on the convex groove of the pump shaft, and the axial positioning expansion joint is installed in the hole to perform axial positioning on the pump shaft; There are multiple telescopic propulsion rods for the pump body, which are distributed in a ring shape. The driving part of the telescopic propulsion rods for the pump body is fixed inside the right half pump body, and the telescopic end of the telescopic propulsion rods for the pump body is connected to the right end of the left half pump body. The bottom of the right half pump body is supported by the pump body base, and rollers are installed on the pump body base. The telescopic propulsion rods for the pump body drive the right half pump body and the pump body base to slide along the annular pump body guide rail, thereby realizing the telescopic transformation of the pump body structure and the adjustable distance ratio between the impeller and the bearing.

2. The horizontal centrifugal pump that realizes the telescopic pump body and the adjustable distance ratio between the impeller and the bearing according to claim 1 is characterized in that: The horizontal centrifugal pump also includes a cantilever adjustment device, which includes a bearing base telescopic propulsion rod, a left fixed plate of the bearing base, a middle sleeve of the bearing base, a right fixed plate of the bearing base, an annular base guide rail, a first bearing, a short shaft sleeve, a micro sound wave transmitter, a micro sound wave receiver, and a second bearing; The bearing base has two telescopic propulsion rods, the driving part of which is fixedly connected to the inside of the left half of the pump body, and the telescopic end is fixedly connected to the left fixed plate of the bearing base; the left fixed plate of the bearing base, the middle sleeve of the bearing base, and the right fixed plate of the bearing base are installed together to form a bearing base, and the first bearing is installed inside the middle sleeve of the bearing base; The annular base guide rail is installed inside the left half of the pump body and is connected with the outer track interface of the middle sleeve of the bearing base; the short shaft sleeve is installed on the pump shaft, and the installation position is located on the inner side of the bearing base; the pump shaft and the short shaft sleeve are installed at the position where a convex groove begins to be formed, and the short shaft sleeve is internally provided with a concave groove, and the convex groove and the concave groove cooperate to prevent the pump shaft from radial relative sliding and facilitate axial movement; the axial movement of the pump shaft is achieved by the telescopic propulsion rod of the bearing base in cooperation with the bearing base and the first bearing; The micro-sonic wave transmitter is embedded in the fixed plate on the right side of the bearing base, and the micro-sonic wave receiver is integrated on the right half of the pump body; the second bearing is installed on the motor shaft and fixed by the right half of the pump body; the distance between the micro-sonic wave transmitter and the first bearing is equal to the distance between the micro-sonic wave receiver and the second bearing.

3. The horizontal centrifugal pump that realizes the expansion and contraction of the pump body and the adjustable distance ratio between the impeller and the bearing according to claim 2 is characterized in that: The horizontal centrifugal pump also includes a pump shaft lubrication device, which includes an annular spray device and a resistance sensor. The annular spray device includes an integrated oil storage tank, an oil pipeline and a nozzle. The oil storage tank is fixedly connected to the left or right side of the bearing base. The oil pipeline is annular and is located directly below the oil storage tank. The nozzles are arranged in a ring on the inner side of the oil pipeline. The nozzles are embedded and installed at the end of the short shaft sleeve and are in contact with the surface of the pump shaft.

4. The horizontal centrifugal pump with a telescopic pump body and an adjustable distance ratio between the impeller and the bearing according to claim 3 is characterized in that: There are two pump shaft lubrication devices, which are respectively located on both sides of the bearing base.

5. The horizontal centrifugal pump with a telescopic pump body and an adjustable distance ratio between the impeller and the bearing according to claim 3, characterized in that: A plurality of holes are provided on the convex groove of the pump shaft, so that the axial positioning expansion joint can be positioned in different holes, thereby realizing a plurality of gear settings for axial positioning of the pump shaft.

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