Horizontal centrifugal pump with high stability

Abstract

The application discloses a horizontal centrifugal pump with high stability, and relates to the technical field of centrifugal pumps, which comprises a bottom plate, a motor fixedly connected to the top surface of the bottom plate, a connecting shaft fixedly connected to the output shaft of the motor, the end of the connecting shaft away from the motor extending into a pump body and being connected with an impeller in the pump body, a support member sleeved outside the connecting shaft, the bottom of the support member being fixedly connected with the bottom plate, an oiling mechanism arranged on the top surface of the support member, a bearing sleeved outside the connecting shaft, the bearing being arranged in the support member, the oiling mechanism being capable of automatically adding lubricating oil to the bearing, a dustproof cylinder sleeved outside the motor, the dustproof cylinder being hollow, and a heat dissipation mechanism arranged in the dustproof cylinder. The combination of the support member and the bearing realizes double positioning in the axial direction and the radial direction, and the running stability is improved. The oiling mechanism realizes automatic supplement of lubricating oil, the frequency of manual maintenance is reduced, the dustproof cylinder wraps the motor, and the heat dissipation mechanism is cooperated, so that dust is prevented from entering the motor, heat is dissipated through the internal heat dissipation structure, and the service life of the motor is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pumps, in particular to a horizontal centrifugal pump with high stability. BACKGROUND

[0002] The centrifugal pump refers to the pump that transports liquid by centrifugal force generated by the rotation of the impeller. Before starting, the pump casing and the suction pipe must be filled with water, and then the motor is started to drive the pump shaft to rotate at high speed, so that the water is rotated outward by the centrifugal force, and then flows into the water pump through the flow channel of the volute pump casing. According to the position of the pump shaft, the centrifugal pump is divided into horizontal centrifugal pump and vertical centrifugal pump.

[0003] The existing horizontal centrifugal pump is driven by the motor. The vibration of the motor is transmitted to the pump body, which causes instability during the operation of the centrifugal pump. The reason for the vibration of the motor is related to the unstable installation and dust accumulation. The existing centrifugal pump does not have a motor protection mechanism, so that a large amount of dust accumulates in the motor and affects heat dissipation. In addition, the transmission shaft between the motor and the pump body is long and needs to be supported. Bearings are needed when supporting. After a long time of use, the bearing wears out due to the reduction of the lubricating oil in the bearing, and the transmission becomes unstable after the bearing wears out, which causes vibration. The existing centrifugal pump cannot realize the automatic lubrication function of the bearing, and needs regular maintenance, which wastes time and has high maintenance cost.

[0004] Therefore, there is an urgent need for a horizontal centrifugal pump with high stability to solve the problems of the prior art. SUMMARY

[0005] The purpose of the present application is to provide a horizontal centrifugal pump with high stability to solve the problems of the prior art.

[0006] To achieve the above purpose, the present application provides the following scheme: the present application provides a horizontal centrifugal pump with high stability, which comprises a bottom plate, the top surface of the bottom plate is fixedly connected with a motor, the output shaft of the motor is fixedly connected with a connecting shaft, one end of the connecting shaft away from the motor extends into the pump body and is connected with an impeller in the pump body, a support is sleeved outside the connecting shaft, the bottom of the support is fixedly connected with the bottom plate, an oiling mechanism is arranged on the top surface of the support, a bearing is sleeved outside the connecting shaft, the bearing is located in the support, the oiling mechanism can automatically add lubricating oil to the bearing, a dustproof cylinder is sleeved outside the motor, the dustproof cylinder is hollow, and a heat dissipation mechanism is arranged in the dustproof cylinder.

[0007] Optionally, the heat dissipation mechanism comprises a serpentine pipe installed in the dustproof cylinder, a plurality of annular pipes are installed on the side wall of the dustproof cylinder, the plurality of annular pipes are communicated through a connecting pipe, and the connecting pipe is communicated with the serpentine pipe.

[0008] Optionally, the dustproof cylinder side wall is fixedly connected with an annular plate, the annular plate communicates the inside of the dustproof cylinder with the outside, and the dustproof cylinder outer wall is detachably connected with an exhaust cover, and the exhaust cover communicates with the annular plate.

[0009] Optionally, the exhaust cover is conical, one end of a large end of the exhaust cover is detachably connected with the dustproof cylinder, and one end of a small end of the exhaust cover is detachably connected with a dustproof net.

[0010] Optionally, the oiling mechanism comprises a box body fixedly connected with the support top surface, a storage tank is installed in the box body, a through hole is formed in the support, an oil outlet pipe of the storage tank extends into the through hole, an electromagnetic valve is installed in the oil outlet pipe, a liquid inlet channel is formed in the bearing outer ring, the liquid inlet channel communicates with the through hole, a protective shell is arranged at the center of the liquid inlet channel, and the protective shell is open at the bottom.

[0011] Optionally, a moving rod is arranged in the through hole, the moving rod top extends into the box body, the moving rod bottom extends into the protective shell and is fixedly connected with a foam plate, a connecting rod is fixedly connected to the moving rod, a fixed plate is arranged on one side of the moving rod, the fixed plate top is fixedly connected with the box body inner top surface, an upper limit position sensor and a lower limit position sensor are fixedly installed on the fixed plate, respectively, one end of the connecting rod away from the moving rod intermittently contacts the upper limit position sensor and the lower limit position sensor, respectively, when the connecting rod contacts the lower limit position sensor, the bearing inner lubricating oil content is less, at this time, the electromagnetic valve is opened, the lubricating oil in the storage tank flows into the bearing, and the increase of the lubricating oil makes the foam plate move upward, driving the connecting rod to move upward, when the connecting rod contacts the upper limit position sensor, the electromagnetic valve is closed, and the bearing inner lubricating oil is sufficient for use.

[0012] Optionally, a plurality of limiting rings are arranged on the outside of the moving rod, the moving rod can move axially along the limiting rings, and the limiting rings are fixedly connected with the box body inner wall.

[0013] Optionally, an upper limit position block is fixedly connected in the protective shell, a lower limit position block is fixedly connected with the protective shell bottom inner wall, the foam plate is located between the upper limit position block and the lower limit position block, and the distance between the upper limit position block and the lower limit position block is the same as the distance between the upper limit position sensor and the lower limit position sensor.

[0014] Optionally, a mounting seat is arranged below the bottom plate, and a plurality of groups of damping devices are arranged between the bottom plate and the mounting seat.

[0015] The application discloses the following technical effects: when in use, the motor drives the connecting shaft to rotate, the connecting shaft drives the impeller in the pump body to rotate, liquid is transported through the rotation of the impeller, the bearing is automatically lubricated through the oiling mechanism, the bearing maintains good performance, the dustproof cylinder is fixedly connected with the groove body on the top surface of the bottom plate, stability is ensured, the motor is fixed on the inner wall of the dustproof cylinder through welding or other existing modes, dust in the external environment cannot enter the motor, so that the motor can normally operate, the heat generated by the motor can be dissipated through the heat dissipation mechanism in the dustproof cylinder, and accumulation of heat is avoided to cause a fault. The motor and the pump body are fixed through the bottom plate, a rigid support foundation is formed, direct connection of the connecting shaft and the impeller ensures power transmission efficiency; the combination of the support and the bearing realizes double positioning in the axial and radial directions, vibration of the connecting shaft is reduced, and operation stability is improved; the oiling mechanism realizes automatic replenishment of lubricating oil, frequency of manual maintenance is reduced, the motor is wrapped by the dustproof cylinder, and the heat dissipation mechanism is cooperated, dust cannot enter the internal motor, heat can be discharged through the internal heat dissipation structure, and the service life of the motor is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings are presented by way of example or for purposes of explanation only. In the drawings:

[0017] Figure 1 It is a structural schematic view of the present application;

[0018] Figure 2 It is another structural schematic view of the present application;

[0019] Figure 3 It is a structural schematic view of the present application after removing the dustproof cylinder;

[0020] Figure 4 It is a structural schematic view of the dustproof cylinder of the present application;

[0021] Figure 5 It is another structural schematic view of the dustproof cylinder of the present application;

[0022] Figure 6 It is a structural schematic view of the present application Figure 2 It is a partial enlarged view of A in the present application;

[0023] Figure 7 It is a structural schematic view of the serpentine pipe and the annular pipe of the present application;

[0024] Figure 8 It is a structural schematic view of the oiling mechanism of the present application;

[0025] Figure 9 It is a partial enlarged view of B in the present application Figure 8

[0026] ​Figure 10 It is a structure schematic view of the bearing outer ring of the application;

[0027] Figure 11 It is a structure schematic view of the bearing outer ring of the application Figure 10 It is a partial enlarged view of C in the application;

[0028] In the figure: 1, mounting seat; 2, damping device; 3, bottom plate; 4, dustproof cylinder; 5, support; 6, box body; 7, pump body; 8, exhaust cover; 9, dust screen; 10, motor; 11, annular pipe; 12, connecting pipe; 13, annular plate; 14, serpentine pipe; 15, bearing; 16, through hole; 17, moving rod; 18, oil storage tank; 19, limiting ring; 20, connecting rod; 21, upper limit sensor; 22, lower limit sensor; 23, fixed plate; 24, upper limit block; 25, foam board; 26, lower limit block; 27, liquid inlet channel; 28, protective shell. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be apparently and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0030] In order to make the above-mentioned objects, features and advantages of the application more obvious and easy to understand, the application will be further described in detail below with reference to the drawings and specific embodiments.

[0031] Referring to Figures 1 to 11 As shown in the figure, the embodiment provides a horizontal centrifugal pump with high stability, which comprises a bottom plate 3, the top surface of the bottom plate 3 is fixedly connected with a motor 10, the output shaft of the motor 10 is fixedly connected with a connecting shaft, the end of the connecting shaft away from the motor 10 extends into a pump body 7 and is connected with an impeller in the pump body 7, a support 5 is sleeved outside the connecting shaft, the bottom of the support 5 is fixedly connected with the bottom plate 3, the top surface of the support 5 is provided with an oiling mechanism, a bearing 15 is sleeved outside the connecting shaft, the bearing 15 is located in the support 5, the oiling mechanism can automatically add lubricating oil to the bearing 15, a dustproof cylinder 4 is sleeved outside the motor 10, the dustproof cylinder 4 is hollow, and a heat dissipation mechanism is arranged in the dustproof cylinder 4.

[0032] In use, the motor 10 drives the connecting shaft to rotate, the connecting shaft drives the impeller in the pump body 7 to rotate, and the rotation of the impeller realizes the delivery of the liquid. The bearing 15 is automatically lubricated by the oiling mechanism, so that the bearing 15 maintains good performance. The dustproof cylinder 4 is fixedly connected with the groove body on the top surface of the bottom plate 3, so as to ensure stability. The motor 10 is fixed on the inner wall of the dustproof cylinder 4 by welding or other existing modes, and the dustproof cylinder 4 can prevent dust from entering the motor 10, so as to ensure normal operation of the motor 10. The heat dissipation mechanism in the dustproof cylinder 4 can ensure that the heat generated by the motor 10 is dissipated, so as to avoid accumulation of heat and cause failure. The motor 10 and the pump body 7 are fixed by the bottom plate 3 to form a rigid support base. The direct connection of the connecting shaft and the impeller ensures the power transmission efficiency. The combination of the support 5 and the bearing 15 realizes double positioning in the axial and radial directions, reduces the vibration of the connecting shaft, and improves the operation stability. The oiling mechanism realizes automatic replenishment of lubricating oil, reduces the frequency of manual maintenance, and the dustproof cylinder 4 wraps the motor 10. The heat dissipation mechanism not only prevents dust from entering the motor 10, but also realizes heat dissipation through the internal heat dissipation structure, prolonging the service life of the motor 10.

[0033] Further refinement scheme, the heat dissipation mechanism includes a serpentine pipe 14 installed in the dustproof cylinder 4, and a plurality of annular pipes 11 are installed on the side wall of the dustproof cylinder 4. The plurality of annular pipes 11 are communicated through a connecting pipe 12, and the connecting pipe 12 is communicated with the serpentine pipe 14.

[0034] Specifically, cold water flows in the serpentine pipe 14, the annular pipe 11 and the connecting pipe 12, and most of the heat can be taken away through the flow of cold water to prevent the temperature in the dustproof cylinder 4 from being too high to damage the motor 10. The serpentine pipe 14 increases the heat dissipation area to improve the heat exchange efficiency. The communication design of the annular pipe 11 and the connecting pipe 12 forms a three-dimensional heat dissipation network, so that the heat in the dustproof cylinder 4 is evenly distributed and quickly discharged, avoiding local overheating and enhancing the uniformity and continuity of the motor 10 heat dissipation.

[0035] Further refinement scheme, the dustproof cylinder 4 is fixedly connected with a ring-shaped plate 13, the ring-shaped plate 13 communicates the inside of the dustproof cylinder 4 with the outside, and the outer wall of the dustproof cylinder 4 is detachably connected with an exhaust hood 8, and the exhaust hood 8 is communicated with the ring-shaped plate 13.

[0036] Specifically, the ring-shaped plate 13 balances the air pressure inside and outside the dustproof cylinder 4 to prevent the internal pressure from rising due to sealing. The detachable exhaust hood 8 facilitates regular cleaning of accumulated dust or replacement of parts, while keeping the exhaust passage unobstructed to ensure continuous and effective operation of the heat dissipation mechanism.

[0037] Further refinement scheme, the exhaust hood 8 is conical, one end of the large port of the exhaust hood 8 is detachably connected with the dustproof cylinder 4, and one end of the small port of the exhaust hood 8 is detachably connected with a dust screen 9.

[0038] Specifically, the conical exhaust cover 8 utilizes the principle of fluid mechanics to form a Venturi effect with large end port air intake and small end port air exhaust, accelerate gas flow, and improve heat dissipation efficiency; the dust screen 9 can filter large particles in the air to prevent dust from entering the dustproof cylinder 4 through the exhaust cover 8, and meet the dual requirements of heat dissipation and dust prevention.

[0039] Further refinement, the oiling mechanism includes a box body 6 fixedly connected with the top surface of the support 5, an oil storage tank 18 is installed in the box body 6, a through hole 16 is formed in the support 5, an oil outlet pipe of the oil storage tank 18 extends into the through hole 16, an electromagnetic valve is installed in the oil outlet pipe, a liquid inlet channel 27 is formed in the outer ring of the bearing 15, the liquid inlet channel 27 is communicated with the through hole 16, and a protective shell 28 is arranged in the center of the liquid inlet channel 27.

[0040] Specifically, the box body 6 and the oil storage tank 18 are designed in an integrated manner to realize centralized storage of lubricating oil; the electromagnetic valve controls the opening and closing of the oil outlet pipe to realize precise start and stop of lubricating oil addition; the liquid inlet channel 27 directly reaches the outer ring of the bearing 15 to ensure that the lubricating oil directly acts on the parts that need to be lubricated; and the open-bottom design of the protective shell 28 avoids the risk of leakage caused by the accumulation of lubricating oil, and provides space for the subsequent movement of the foam plate 25.

[0041] Further refinement, the oiling mechanism includes a box body 6 fixedly connected with the top surface of the support 5, an oil storage tank 18 is installed in the box body 6, a through hole 16 is formed in the support 5, an oil outlet pipe of the oil storage tank 18 extends into the through hole 16, an electromagnetic valve is installed in the oil outlet pipe, a liquid inlet channel 27 is formed in the outer ring of the bearing 15, the liquid inlet channel 27 is communicated with the through hole 16, and a protective shell 28 is arranged in the center of the liquid inlet channel 27.

[0042] Specifically, the foam plate 25 is driven to move the moving rod 17 by the buoyancy generated by the rise and fall of the lubricating oil liquid level, and the contact state of the connecting rod 20 and the upper and lower limit sensors 22 forms a closed loop feedback: when the lubricating oil is insufficient, the connecting rod 20 triggers the lower limit sensor 22 to open the electromagnetic valve to supplement the oil; after the liquid level rises, the connecting rod 20 triggers the upper limit sensor 21 to close the electromagnetic valve, realizing automatic monitoring and precise control of the amount of lubricating oil, and avoiding excess or deficiency.

[0043] Further refine the scheme, the outer side of the moving rod 17 is sleeved with a plurality of limiting rings 19, the moving rod 17 can move axially along the limiting ring 19, and the limiting ring 19 is fixedly connected with the inner wall of the box body 6.

[0044] Specifically, the limiting ring 19 axially guides the moving rod 17, prevents it from deviating or shaking during movement, ensures the accurate contact position of the connecting rod 20 and the sensor, improves the reliability of the detection signal, and avoids false triggering caused by mechanical shaking.

[0045] Further refine the scheme, the upper limiting block 24 is fixedly connected in the protective shell 28, the lower limiting block 26 is fixedly connected to the inner wall at the bottom of the protective shell 28, and the foam plate 25 is located between the upper limiting block 24 and the lower limiting block 26.

[0046] Specifically, the upper limiting block 24 and the lower limiting block 26 mechanically limit the foam plate 25 to prevent it from moving excessively and causing sensor detection failure or structural damage; the distance between the two is the same as the distance between the sensors, realizing double protection of mechanical limiting and electronic detection, and ensuring the lubricating oil quantity control precision and equipment operation safety.

[0047] Further refine the scheme, the mounting seat 1 is arranged below the bottom plate 3, and the damping device 2 is arranged between the bottom plate 3 and the mounting seat 1.

[0048] Specifically, the damping device 2 absorbs the vibration energy between the bottom plate 3 and the mounting seat 1 through buffering, reduces the mechanical impact during equipment operation, reduces the fatigue damage of key components such as connecting shafts and bearings 15, improves the anti-seismic performance and long-term operation stability of the overall structure, and prolongs the service life of the equipment.

[0049] Further, the damping device 2 herein is prior art, and the damping device 2 can adopt one or a combination of a hydraulic shock absorber, an inflatable shock absorber, a variable damping shock absorber and a rubber shock absorber, and can achieve good damping performance.

[0050] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0051] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification and improvement made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A horizontal centrifugal pump with high stability, characterized by: The utility model provides a kind of automatic lubricating pump, including bottom plate (3), the top surface of the bottom plate (3) is fixedly connected with motor (10), the output shaft of the motor (10) is fixedly connected with connecting shaft, the end of the connecting shaft away from the motor (10) is inserted into pump body (7) and is connected with impeller in the pump body (7), support piece (5) is sleeved outside the connecting shaft, the bottom of the support piece (5) is fixedly connected with the bottom plate (3), the top surface of the support piece (5) is provided with oiling mechanism, bearing (15) is sleeved outside the connecting shaft, the bearing (15) is located in the support piece (5), the oiling mechanism can automatically add lubricating oil to bearing (15), the outside of the motor (10) is sleeved with dustproof cylinder (4), the dustproof cylinder (4) is hollow, the dustproof cylinder (4) is provided with heat dissipation mechanism; The side wall of the dustproof cylinder (4) is fixedly connected with annular plate (13), the annular plate (13) makes the inside of the dustproof cylinder (4) communicate with the outside, the outer wall of the dustproof cylinder (4) is detachably connected with exhaust hood (8), the exhaust hood (8) communicates with the annular plate (13); The exhaust hood (8) is conical, one end of the large end of the exhaust hood (8) is detachably connected with the dustproof cylinder (4), one end of the small end of the exhaust hood (8) is detachably connected with dust screen (9); The oiling mechanism includes box body (6) fixedly connected with the top surface of the support piece (5), the box body (6) is mounted with oil storage tank (18), the support piece (5) is provided with through hole (16), the oil outlet pipe of the oil storage tank (18) is inserted into the through hole (16), the electromagnetic valve is mounted in the oil outlet pipe, the outer ring of the bearing (15) is provided with liquid inlet channel (27), the liquid inlet channel (27) communicates with the through hole (16), the liquid inlet channel (27) is provided with protective shell (28) in the center, the bottom of the protective shell (28) is open; The through hole (16) is provided with moving rod (17), the top of the moving rod (17) is inserted into the box body (6), the bottom of the moving rod (17) is inserted into the protective shell (28) and is fixedly connected with foam plate (25), the moving rod (17) is fixedly connected with connecting rod (20), the moving rod (17) is provided with fixed plate (23) on one side, the top of the fixed plate (23) is fixedly connected with the top surface in the box body (6), the fixed plate (23) is respectively fixedly installed with upper limit sensor (21) and lower limit sensor (22), one end of the connecting rod (20) away from the moving rod (17) is respectively intermittently contacted with the upper limit sensor (21) and lower limit sensor (22), when the connecting rod (20) is contacted with the lower limit sensor (22), the lubricating oil content in bearing (15) is less, at this time electromagnetic valve opens, the lubricating oil in oil storage tank (18) flows into bearing (15), the increase of lubricating oil makes foam plate (25) move upwards, drives connecting rod (20) to move upwards, when connecting rod (20) is contacted with upper limit sensor (21), electromagnetic valve is closed, and the lubricating oil in bearing (15) is enough for use.

2. The horizontal centrifugal pump having high stability according to claim 1, characterized by: The heat dissipation mechanism comprises a serpentine pipe (14) installed in the dustproof cylinder (4), a plurality of annular pipes (11) are installed on the sidewall of the dustproof cylinder (4), the plurality of annular pipes (11) are communicated through a connecting pipe (12), and the connecting pipe (12) is communicated with the serpentine pipe (14).

3. The horizontal centrifugal pump having high stability according to claim 1, characterized in that: A plurality of limiting rings (19) are sleeved outside the moving rod (17), the moving rod (17) can move axially along the limiting rings (19), and the limiting rings (19) are fixedly connected with the inner wall of the box body (6).

4. The horizontal centrifugal pump having high stability according to claim 3, characterized in that: The protective shell (28) is fixedly connected with an upper limiting block (24) and a lower limiting block (26) is fixedly connected to the inner wall of the bottom of the protective shell (28), the foam plate (25) is located between the upper limiting block (24) and the lower limiting block (26), and the distance between the upper limiting block (24) and the lower limiting block (26) is the same as the distance between the upper limiting sensor (21) and the lower limiting sensor (22).

5. The horizontal centrifugal pump having high stability according to claim 1, characterized in that: A plurality of sets of damping devices (2) are arranged between the bottom plate (3) and the mounting seat (1).

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