Vertical rolling sealing bearing supporting power sealing leakage-free submerged pump

Abstract

The invention discloses a vertical rolling sealing bearing supporting power sealing leakage-free submerged pump which comprises a bottom plate, a motor frame is installed on the bottom plate, an upper supporting component is installed on the motor frame, a supporting pipe is installed at the lower end of the upper supporting component, and a lower supporting component is installed at the lower end of the supporting pipe. An elastic pin coupling for connecting an upper shaft in the upper supporting part with a lower shaft in the lower supporting part is mounted in the supporting pipe, and a power adjusting device is matched with a swallow-tail-shaped O-shaped ring, so that sealing can be realized during parking, and no leakage during parking is ensured; by means of the design that the rolling sealing bearing replaces a traditional guide bearing sealing bearing and matching of the upper supporting component, the lower supporting component and the elastic pin coupler, limitation of harsh media and engineering conditions can be eliminated, maintenance is not needed all the time, and the use cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifugal pumps, in particular to a vertical rolling seal bearing supporting power seal leakage-free submersible pump. BACKGROUND

[0002] In recent years, with the rapid development of chemical industry, problems related to centrifugal pumps are constantly being raised. Traditional seals all use a secondary impeller for power sealing, which will have medium leakage when stopping and starting, and cannot achieve sealing when stopping, or will have leakage when stopping.

[0003] The vertical submersible centrifugal pump has high requirements for engineering conditions when conveying medium with particles or easy crystallization. When the external cooling water pressure is too low or the flow rate is low, the guide bearing cannot be effectively flushed and lubricated, and the guide bearing is easily damaged. At the same time, when the external flushing engineering condition cannot be provided, the use of the submersible pump is limited, and it cannot be used. When the medium density is large, the shaft material is limited due to strength reasons. SUMMARY

[0004] The present application aims to provide a vertical rolling seal bearing supporting power seal leakage-free submersible pump to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a vertical rolling seal bearing supporting power seal leakage-free submersible pump, comprising a bottom plate, a motor frame is installed on the bottom plate, an upper support component is installed on the motor frame, a support pipe is installed at the lower end of the upper support component, a lower support component is installed at the lower end of the support pipe, an elastic pin coupling connecting an upper shaft in the upper support component with a lower shaft in the lower support component is installed in the support pipe, a pump cover is installed at the lower end of the lower support component, a pump body is installed at the lower end of the pump cover, the lower shaft in the lower support component extends through the pump cover into the pump body and is installed with an impeller and an impeller bolt, a liquid outlet pipe component communicating with the inside of the pump body is installed on the pump body and placed on the bottom plate, and a wear plate is arranged at the lower end of the inside of the pump body.

[0006] Preferably, the upper support component comprises an upper support pipe and an upper shaft, the upper end of the upper support pipe is installed on the motor frame, the upper shaft is fixed with a bearing body, a round nut, a stop washer, a rolling seal bearing one and a rolling seal bearing two and is installed in the upper support pipe, and the lower end of the upper shaft extends into the support pipe and is installed on the upper end of the elastic pin coupling.

[0007] Preferably, the lower support component comprises a lower support pipe and a lower shaft, the lower support pipe is connected with the support pipe and the pump cover respectively, the lower shaft is fixed with a rolling seal bearing three and a rolling seal bearing four and is installed in the lower support pipe, and the upper end of the lower shaft extends into the support pipe and is installed on the lower end of the elastic pin coupling.

[0008] Preferably, the lower shaft is also provided with a power adjusting device, the power adjusting device is installed in the cavity opened at the upper end of the pump cover, the pump cover is provided with a dovetail-shaped O-shaped groove, and a dovetail-shaped O-shaped ring is installed in the dovetail-shaped O-shaped groove, and parking sealing is realized through the cooperation of the power adjusting device and the dovetail-shaped O-shaped ring.

[0009] Preferably, the cavity opened at the upper end of the pump cover is provided with a float switch, the connecting line of the float switch is extended out through the alarm cable pipeline connected to the pump cover, and the float switch is connected with a medium leakage alarm system.

[0010] Preferably, the lower shaft is extended out of the pump cover to form a filling groove, the filling groove is filled with a packing seal, and the lower shaft is provided with a packing sleeve corresponding to the packing seal, and a packing gland installed on the pump cover is used to compress the packing seal.

[0011] Preferably, the bearing body is fixed with a bearing gland through a fixing bolt and an adjusting bolt, and a fixing nut is screwed on the adjusting bolt, which is used to adjust the distance between the two coupling joints of the elastic pin coupling.

[0012] Preferably, the impeller is of a semi-open structure, the back blade of the impeller has the same geometric shape as the main blade, and is uniformly distributed, the main blade and the back blade coincide, the number of back blades is twice the number of main blades, the length of the back blade between the two back blades coinciding with the main blade is 2 / 3 of the length of the main blade, and the width of the back blade is 1 / 2 of the width of the main blade, and the back blade and the main blade have the same rotation direction.

[0013] Compared with the prior art, the application has the following advantages: 1. Through the integrated design of the impeller, negative pressure can be formed at the upper end of the impeller hub, and power sealing can be realized during operation, and the axial force can be effectively balanced; 2. The cooperation of the power adjusting device and the dovetail-shaped O-shaped ring can realize sealing when parking, and ensure no leakage when parking; 3. By replacing the traditional guide bearing sealing bearing design with the rolling sealing bearing, and cooperating the upper support part, the lower support part and the elastic pin coupling, the restriction of harsh medium and engineering conditions can be eliminated, maintenance is not required, and the use cost is reduced; 4. The design of the packing seal can reduce the leakage of the medium at the moment of starting; 5. The float switch can monitor the leakage, and remind timely maintenance after a certain condition. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a front view structural schematic diagram of the application.

[0015] Fig. 2 It is an impeller structure schematic diagram of the application.

[0016] Fig. 3 Figure 1 is a schematic diagram of the pump cover dovetail O-ring groove and the start and stop state structure of the present application.

[0017] In the figure: 1 wear plate, 2 pump body, 3 packing gland, 4 packing seal, 5 float switch, 6 pump cover, 7 lower support pipe, 8 alarm cable line, 9 cooling water inlet pipe, 10 cooling water outlet pipe, 11 support pipe, 12 upper support pipe, 13 bottom plate, 14 bearing body, 15 bearing gland, 16 fixed nut, 17 adjusting bolt, 18 motor frame, 19 fixed bolt, 20 round nut, 21 stop washer, 22 rolling seal bearing one, 23 upper shaft, 24 rolling seal bearing two, 25 liquid outlet pipe component, 26 elastic pin coupling, 27 lower shaft, 28 rolling seal bearing three, 29 rolling seal bearing four, 30 power adjusting device, 31 packing shaft sleeve, 32 impeller, 33 impeller bolt, 34 dovetail O-ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0019] Please refer to Figs. 1-3 The present application provides a technical solution: a vertical rolling seal bearing support power seal no-leakage liquid down pump, comprising a bottom plate 13, a motor frame 18 is installed on the bottom plate 13, an upper support component is installed on the motor frame 18, a support pipe 11 is installed at the lower end of the upper support component, a lower support component is installed at the lower end of the support pipe 11, an elastic pin coupling 26 is installed in the support pipe 11 to connect the upper shaft 23 in the upper support component with the lower shaft 27 in the lower support component, a pump cover 6 is installed at the lower end of the lower support component, a pump body 2 is installed at the lower end of the pump cover 6, the lower shaft 27 in the lower support component extends through the pump cover 6 to the pump body 2 and is installed with an impeller 32 and an impeller bolt 33, a liquid outlet pipe component 25 is installed on the pump body 2 and is placed above the bottom plate 13, and a wear plate 1 is arranged at the lower end of the inside of the pump body 2.

[0020] The upper support component comprises an upper support pipe 12 and an upper shaft 23, the upper end of the upper support pipe 12 is installed on the motor frame 18, the bearing body 14, the round nut 20, the stop washer 21, the rolling seal bearing one 22 and the rolling seal bearing two 24 are fixed on the upper shaft 23 and are installed in the upper support pipe 12, and the lower end of the upper shaft 23 extends into the support pipe 11 and is installed on the upper end of the elastic pin coupling 26.

[0021] The lower support component comprises a lower support tube 7 connected with the support tube 11 and the pump cover 6 respectively, and a lower shaft 27 on which rolling seal bearing three 28 and rolling seal bearing four 29 are fixed and installed in the lower support tube 7, and the upper end of the lower shaft 27 extends into the support tube 11 and is installed below the elastic column pin coupling 26.

[0022] As shown in the figure, the impeller 32 is of a half-open structure, the back blade geometry of the impeller 32 is the same as the main blade shape, and the back blades are uniformly distributed and coincide with the main blades, the number of the back blades is twice the number of the main blades, the length of the back blade between the two back blades coinciding with the main blades is 2 / 3 of the length of the main blade, and the width of the back blade is 1 / 2 of the width of the main blade. The back blades have the same rotation direction as the main blades. Fig. 2

[0023] Balance holes equal in number to the main blades are provided on the impeller 32 for balancing the axial force generated by the impeller 32 during operation.

[0024] As shown in the figure, the lower shaft is also provided with a power adjustment device 30, the power adjustment device 30 is installed in the cavity provided on the upper end of the pump cover 6, the pump cover 6 is provided with a dovetail-shaped O-shaped groove, and a dovetail-shaped O-shaped ring 34 is installed in the dovetail-shaped O-shaped groove, and parking sealing is realized through the cooperation of the power adjustment device 30 and the dovetail-shaped O-shaped ring 34. Fig. 3 The pump cover 6 is provided with a platform corresponding to the through end of the lower shaft 27 and located on one side of the cavity, and the dovetail-shaped O-shaped groove is provided on the platform.

[0025] The power adjustment device 30 comprises a dynamic block, centrifugal blocks and a fixed sleeve installed on the circumference of the lower shaft 27 from bottom to top, the four centrifugal blocks are fixedly installed on the lower shaft and rotate with the lower shaft 27, the edge of the centrifugal block is a symmetrical taper surface, the end surface of the dynamic block and the fixed sleeve close to the centrifugal block is complementary to the taper surface on the centrifugal block, the dynamic block, the centrifugal blocks and the fixed sleeve are all provided with matching through holes and are installed through studs, the end of the stud extends out of the dynamic block and is screwed with an adjusting nut, the dynamic block is provided with a groove matching the size of the adjusting nut, a spring is sleeved on the stud, and the spring is located between the adjusting nut and the groove. The radial gap between the dynamic block and the lower shaft is 1-2 mm, and the radial gap between each static centrifugal block and the shaft is 0.25 times the diameter of the shaft.

[0026] The lower end of the dynamic block extends outward to form a boss, and the lower end of the dynamic block extends to the platform of the pump cover, and the boss can act on the dovetail-shaped O-shaped ring 34.

[0027]

[0028] ​​When the lower shaft 27 is in stop operation, the moving block has driving force to move upward under the force of the spring, the boss extrudes the dovetail O-shaped ring 34, so that the power adjusting device 30 is attached to the pump cover 6, and is sealed through the O-shaped ring 34 in the dovetail groove, so as to achieve the parking sealing state.

[0029] When the lower shaft 27 is in operation, the centrifugal block moves radially away from the lower shaft 27 under the action of centrifugal force, and the conical surface of the centrifugal block provides a thrust to the complementary surface of the moving block and the fixed sleeve. Since the fixed sleeve is fixed on the lower shaft, the centrifugal block axially pushes the moving block to compress the spring. When the centrifugal force is greater than the spring force, the moving block moves away from the centrifugal block, so as to achieve the purpose of power adjustment, and then drives the moving block to move downward, so that the boss is separated from the dovetail O-shaped ring 34, and is not limited by the engineering conditions.

[0030] The chamber opened at the upper end of the pump cover 6 is provided with a float switch 5, the connecting line of the float switch 5 is extended out through the alarm cable line 8 connected to the pump cover 6, and the float switch 5 is connected with a medium leakage alarm system.

[0031] The lower shaft 27 extends out of the pump cover 6 as a filling groove, the filling groove is filled with a packing seal 4, and the lower shaft 27 is provided with a packing sleeve 31 corresponding to the packing seal 4, and the packing seal 4 is compressed by the packing gland 3 installed on the pump cover 6.

[0032] The bearing cover 15 is fixed on the bearing body 14 through the fixing bolt 19 and the adjusting bolt 17, and the fixing nut 16 is screwed on the adjusting bolt 17, which is used to adjust the distance between the two coupling joints of the elastic column pin coupling 26.

[0033] Corresponding to the rolling seal bearing two 24, the rolling seal bearing three 28 and the rolling seal bearing four 29, the cooling water inlet pipeline 9 is installed, and the annular channels are respectively opened at the lower end of the upper support pipe and the lower support pipe corresponding to the rolling seal bearing two 24, the rolling seal bearing three 28 and the rolling seal bearing four 29, and the cooling pipeline joints are symmetrically arranged on the annular channels. The cooling water inlet pipeline 9 is connected to the annular channel corresponding to the rolling seal bearing two 24, the annular channel corresponding to the rolling seal bearing three 28 and the annular channel corresponding to the rolling seal bearing four 29 in sequence, and then the cooling water outlet pipeline 10 is connected to the cooling pipeline joint at the other end of the annular channel corresponding to the rolling seal bearing four 29.

[0034] The temperature of the medium is detected by the temperature detection device, when the temperature of the medium is higher than 60℃, the temperature of the medium is transmitted to the cooling system by the temperature detection device, and the cooling water is introduced into the cooling water inlet pipeline 9 to cool the rolling seal bearing through the start of the cooling system.

[0035] Sealing rings are arranged between the packing sleeve 31, the impeller 32 and the impeller bolt 33.

[0036] Working principle: Before the pump works, first warm the pump, rotate counterclockwise to the free state, so that the elastic pin coupling 26 two joint sections are attached, then clockwise rotate the adjusting bolt 17 to contact with the upper support pipe 12, continue to rotate the adjusting bolt 17 clockwise, axially advance the distance between the two joint sections of the elastic pin coupling 26, and then tighten the fixing nut 16 when the adjustment is finished, and finally tighten the fixing bolt 19 to fix the bearing cover 15. When the pump works, the spring in the power adjustment device 30 is compressed by centrifugal force, the power adjustment device is separated from the pump cover 6, the impeller 32 main impeller pumps the medium out of the liquid outlet pipe part 25, and the back blade of the impeller 32 forms a negative pressure when working, a negative pressure area is formed between the hub of the impeller 32 main impeller and the packing seal 4 during the back blade of the impeller 32 pumping out of the liquid outlet pipe part 25, and the medium between the hub of the impeller 32 main impeller and the packing seal 4 is also pumped out due to negative pressure. If the float switch alarm system fails, the medium between the rolling seal bearing 29 and the pump cover 6 is sucked in and pumped out by the back blade, protecting the seal bearing from being immersed in the medium. When parking, the centrifugal force disappears, the spring in the power adjustment device 30 is elongated, the power adjustment device 30 is attached to the pump cover 6, sealed by the dovetail-shaped O-ring 34 in the dovetail-shaped groove, and parking sealing is achieved. The design of the dovetail-shaped groove can protect the dovetail-shaped O-ring 34 from being stable on the pump cover 6. The packing seal 4 can seal the leakage of the medium at the moment of starting and parking. When the packing seal is severely worn or the dovetail-shaped O-ring 34 in the pump cover dovetail-shaped groove is damaged, the medium leakage reaches the linkage state of the float switch 5, and signal alarm can be realized. When the medium temperature is higher than 60℃, cooling water is introduced to cool the seal bearing.

[0037] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A vertical rolling seal bearing-supported, leak-free submersible pump, comprising a base plate on which a motor frame is mounted, characterized in that: An upper support component is mounted on the motor frame. A support tube is mounted at the lower end of the upper support component. A lower support component is mounted at the lower end of the support tube. An elastic pin coupling connecting the upper shaft of the upper support component and the lower shaft of the lower support component is installed inside the support tube. A pump cover is mounted at the lower end of the lower support component. A pump body is mounted at the lower end of the pump cover. The lower shaft of the lower support component extends through the pump cover into the pump body and is fitted with an impeller and impeller bolts. A liquid outlet pipe component communicating with its interior is mounted on the pump body and placed on a base plate. A wear-resistant plate is provided at the lower end of the interior of the pump body.

2. The vertical rolling seal bearing-supported dynamic seal leak-free submersible pump according to claim 1, characterized in that: The upper support component includes an upper support tube and an upper shaft. The upper end of the upper support tube is mounted on the motor frame. The upper shaft is fixed with a bearing body, a round nut, a locking washer, a rolling seal bearing one, and a rolling seal bearing two, which are installed inside the upper support tube. The lower end of the upper shaft extends into the support tube and is installed into the upper end of the elastic pin coupling.

3. The vertical rolling seal bearing-supported dynamic seal leak-free submersible pump according to claim 1, characterized in that: The lower support component includes a lower support tube and a lower shaft. The lower support tube is connected to the support tube and the pump cover respectively. Rolling seal bearing three and rolling seal bearing four are fixed on the lower shaft and installed inside the lower support tube. The upper end of the lower shaft extends into the support tube and is installed into the lower end of the elastic pin coupling.

4. The vertical rolling seal bearing-supported dynamic seal leak-free submersible pump according to claim 3, characterized in that: A power adjustment device is also installed on the lower shaft. The power adjustment device is installed in the cavity opened at the upper end of the pump cover. The pump cover is provided with a dovetail O-groove, and a dovetail O-ring is installed in the dovetail O-groove. The power adjustment device and the dovetail O-ring cooperate to achieve a stop seal.

5. The vertical rolling seal bearing-supported dynamic seal leak-free submersible pump according to claim 3, characterized in that: A float switch is installed in the cavity at the upper end of the pump cover. The connection line of the float switch is extended through the alarm cable pipe connected to the pump cover, and the float switch is connected to the medium leakage alarm system.

6. The vertical rolling seal bearing-supported dynamic seal leak-free submersible pump according to claim 4, characterized in that: The lower shaft extends out of the pump cover to form a filling groove, which is filled with a packing seal. A packing bushing is installed on the lower shaft corresponding to the packing seal, and a packing gland installed on the pump cover is used to press the packing seal tight.

7. The vertical rolling seal bearing-supported dynamic seal leak-free submersible pump according to claim 1, characterized in that: The bearing housing is secured with a bearing cap by fixing bolts and adjusting bolts, and a fixing nut is screwed onto the adjusting bolt for adjusting the distance between the two coupling sections of the elastic pin coupling.

8. The vertical rolling seal bearing-supported dynamic seal leak-free submersible pump according to claim 1, characterized in that: The impeller has a semi-open structure. The geometry of the back blades is the same as that of the main blades, and they are evenly distributed. The main blades and back blades overlap, and the number of back blades is twice the number of main blades. The length of the back blade between the two back blades that overlap with the main blades is 2 / 3 of the length of the main blade, and the width is 1 / 2 of the width of the main blade. The back blades and main blades rotate in the same direction.

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