Self-operated forced circulation end suction pump cooling device

Abstract

The utility model provides a self-operated forced circulation end suction pump cooling device which comprises a box body, a base, a shaft, a bearing, a forced circulation wheel, a limiting device and a belt pulley, the bearing, the forced circulation wheel, the limiting device and the belt pulley are arranged on the shaft, the box body comprises a liquid supply cavity and a liquid return cavity, the shaft is assembled with the box body through the bearing, the forced circulation wheel and the limiting device are arranged on the shaft, and the belt pulley is arranged on the base. When the forced circulation wheel coaxially rotates, the liquid cooling medium in the liquid return chamber is discharged into the liquid supply chamber, and then the cooling medium is provided for the water-cooled motor through the cooling liquid supply pipe. The end suction pump, the water-cooled motor and the cooling device are organically combined, self-operated forced circulation is adopted, an external power source is not needed, and the forced circulation wheel is convenient to use. And the cooling medium can be stably output, the cooling effect of the unit is guaranteed, and the device is suitable for a wider application range.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling devices for pumps, in particular to a forced circulation cooling device for an end suction pump. Background Art

[0002] End suction pumps have the advantages of low noise and high conversion efficiency, and are gradually replacing the original ordinary units in the liquid pump industry. In actual use, end suction pumps are usually equipped with variable frequency water-cooled permanent magnet synchronous motors to provide power, but the cooling source of variable frequency water-cooled permanent magnet synchronous motors has great limitations. When the pump transports water media, the transported media can be used as a coolant to achieve the purpose of self-cooling; when transporting special media that cannot be used as a coolant, self-cooling cannot be used, and an external cooling source must be used. Limited by on-site conditions, the addition of a cooling source usually causes many difficulties and cannot guarantee the cooling effect. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a self-powered forced circulation end suction pump cooling device, which organically combines the end suction pump, the water-cooled motor and the cooling device, not only uses the power provided by the motor itself, but also can stably output the cooling medium to ensure the cooling effect of the unit.

[0004] The utility model provides a self-powered forced circulation end-suction pump cooling device, comprising a box body, a base, and a shaft, wherein the base is located at the bottom of the box body and is used to fix the device; a liquid supply chamber and a liquid return chamber are arranged inside the box body, and the liquid supply chamber and the liquid return chamber are two chambers connected to each other; a liquid outlet is arranged on the cavity wall of the liquid supply chamber; a liquid return port is arranged on the cavity wall of the liquid return chamber; a pulley is arranged at one end of the shaft, which can receive power from a motor through a belt; the other end of the shaft extends into the interior of the box body and is assembled with the box body through a bearing, so that the shaft can rotate around a center line; a coaxially assembled forced circulation wheel is arranged on the shaft, and the forced circulation wheel is located at the connecting point between the liquid supply chamber and the liquid return chamber, and when the forced circulation wheel rotates with the shaft, the cooling medium in the liquid return chamber is discharged into the liquid supply chamber.

[0005] Preferably, the part of the shaft located in the box is the inner shaft, and the part located outside the box is the outer shaft. A bearing is provided at each end of the inner shaft, and the bearing close to the outer shaft is a rolling bearing; the bearing far from the outer shaft is a sliding bearing, so as to avoid axial stress caused by thermal expansion and contraction between the shaft and the box, while taking into account radial mechanical stability.

[0006] Preferably, the housing is provided with a bearing groove, the rolling bearing is installed in the bearing groove, and then fixed by a bearing gland connected to the housing with bolts.

[0007] Furthermore, since the motor speed varies greatly in different usage scenarios, the shaft and the forced circulation wheel may rotate too fast. The faster the speed, the greater the pressure of the coolant in the liquid supply chamber. Excessive pressure will cause the temperature to rise, hindering the overall cooling effect. Therefore, a limit device is provided on the shaft. The forced circulation wheel and the shaft are relatively fixed in the rotation direction of the shaft, but can slide relative to each other in the axial direction within the range limited by the limit device. When the pressure in the liquid supply chamber increases, the forced circulation wheel slides toward the return liquid chamber, the volume of the liquid supply chamber increases, and the pressure decreases.

[0008] Furthermore, the limiting device includes a positioning retaining ring, a spring, a spring fixed terminal, and a spring floating retaining ring; the positioning retaining ring is located on the side of the forced circulation wheel close to the liquid supply chamber and is fixedly assembled with the shaft; the spring, the spring fixed terminal, and the spring floating retaining ring are located on the side of the forced circulation wheel close to the liquid return chamber; the spring fixed terminal is fixedly installed on the shaft, and the spring floating retaining ring is sleeved on the shaft and is adjacent to the forced circulation wheel; the spring is located between the spring fixed terminal and the spring floating retaining ring. Normally, the forced circulation wheel is pressed between the positioning retaining ring and the spring floating retaining ring by the spring; when the pressure in the liquid supply chamber is too large, the forced circulation wheel that is forced to rotate slides toward the liquid return chamber, and the spring located on one side of the liquid return chamber is compressed and deformed; when the pressure in the liquid supply chamber decreases, the force applied to the forced circulation wheel decreases or disappears, and the spring recovers in the deformed state, pressing the spring floating retaining ring and the forced circulation wheel to move toward the liquid supply chamber. The spring floating retaining ring not only serves as a thrust relay device between the spring and the forced circulation wheel, but also has the function and effect of sealing between the shaft and the forced circulation wheel.

[0009] Furthermore, the box body also includes a detachable pressure cover. After the pressure cover is removed, the shaft and the forced circulation wheel can be taken out as a whole at the open part to facilitate maintenance.

[0010] Furthermore, the outer wall of the box body is provided with fins with a heat dissipation function to enhance the heat dissipation effect of the box body and make the internal cooling medium cool down faster.

[0011] Compared with the related art, the self-powered forced circulation end suction pump cooling device provided by the utility model has the following beneficial effects:

[0012] The power adopts self-powered forced circulation, which does not require an external power source and has strong adaptability. It has the beneficial effects of reducing the cost of the whole unit and making processing, installation and maintenance convenient and quick;

[0013] The cooling cycle is an independent cycle and has nothing to do with the conveying medium of the end suction pump, which expands the application range of the pump, improves the universality and stability of the cooling device, and achieves the technical effect of fully cooling the unit;

[0014] Adaptive coolant supply pressure can match more usage scenarios and improve cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of the self-powered forced circulation end-suction pump cooling device disclosed in the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the limiting device disclosed in the utility model;

[0017] Figure 3 The utility model discloses a schematic diagram of the connection between the self-powered forced circulation end suction pump cooling device structure and the unit consisting of the end suction pump and the water-cooled permanent magnet motor.

[0018] Numbers in the figure: 1. Box body; 101. Liquid supply chamber; 102. Liquid return chamber; 103. Liquid supply port; 104. Liquid return port; 105. Pressure cover; 106. Bearing pressure cover; 107. Fin; 2. Shaft; 201. Outer shaft; 202. Inner shaft; 3. Pulley; 4. Belt; 5. Forced circulation wheel; 601. Rolling bearing; 602. Sliding bearing; 7. Limiting device; 701. Positioning retaining ring; 702. Spring fixed terminal; 703. Spring; 704. Spring floating retaining ring; 8. Base; 9. Self-powered forced circulation end suction pump cooling device; 10. Water-cooled permanent magnet motor; 11. End suction pump; 12. Coolant supply pipe; 13. Coolant return pipe; 14. Coupling. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0020] As attached Figure 3 The self-powered forced circulation end suction pump cooling device 9 disclosed in the utility model, together with the conventional water-cooled permanent magnet motor 10 and the end suction pump 11, forms a set of units. The water-cooled permanent magnet motor 10 provides power for the end suction pump 11 to work through the coupling 14 on the one hand, and provides power for the self-powered forced circulation end suction pump cooling device 9 through the belt 4 on the other hand; a coolant supply pipe 12 and a coolant return pipe 13 are also provided between the water-cooled permanent magnet motor 10 and the self-powered forced circulation end suction pump cooling device 9, and the coolant enters the water-cooled permanent magnet motor 10 from the coolant supply pipe 12 to cool it down, and then enters the return port 104 of the self-powered forced circulation end suction pump cooling device 9 through the coolant return pipe 13, and flows back to the self-powered forced circulation end suction pump cooling device 9, and the device in the self-powered forced circulation end suction pump cooling device 9 pumps the coolant into the coolant supply pipe 12 through the supply port 103, thereby forming a circulating flow of the coolant.

[0021] As attached Figure 1The present invention is a schematic diagram of the structure of the self-powered forced circulation end suction pump cooling device 9 disclosed in the utility model, including a housing 1, a base 8, a shaft 2, and a sliding bearing 602, a forced circulation wheel 5, a limiting device 7, a rolling bearing 601, and a pulley 3 arranged on the shaft 2. The shaft 2 is assembled with the housing 1 through two bearings, a sliding bearing 602 and a rolling bearing 601; the sliding bearing 602 and the rolling bearing 601 are both embedded in the housing 1; the shaft 2 is composed of an inner shaft 202 extending into the housing 1 and an outer shaft 201 located outside the housing 1; the pulley 3 is arranged on the outer shaft 201; the forced circulation wheel 5 and the limiting device 7 are arranged on the inner shaft 202, and the forced circulation wheel 5 rotates with the inner shaft 202, and can slide on the shaft 202 within a limited range in the axial direction by the limiting device 7. The center lines of the inner shaft 202, the sliding bearing 602, the forced circulation wheel 5, the rolling bearing 601, the outer shaft 201, and the pulley 3 are all coaxial.

[0022] The housing 1 includes a liquid supply chamber 101 and a liquid return chamber 102. The liquid supply chamber 101 and the liquid return chamber 102 are two connected chambers. The forced circulation wheel 5 is arranged at the connection point. When the forced circulation wheel 5 rotates, the liquid coolant in the liquid return chamber 102 is discharged into the liquid supply chamber 101; a liquid supply port 103 is arranged on the wall of the liquid supply chamber 101 for connecting to the coolant supply pipe 12 outside the housing 1; a liquid return port 104 is arranged on the wall of the liquid return chamber 102 for connecting to the coolant return pipe 13 outside the housing 1.

[0023] As attached Figure 2 As shown, the limiting device 7 includes a positioning retaining ring 701, a spring fixed terminal 702, a spring 703, and a spring floating retaining ring 704; the positioning retaining ring 701 is located on the side of the forced circulation wheel 5 close to the liquid supply chamber 101, and is fixedly assembled with the inner shaft 202; the spring fixed terminal 702 is fixedly installed on the inner shaft 202, and the spring floating retaining ring 704 is sleeved on the inner shaft 202 and is adjacent to the forced circulation wheel 5; the spring 703 is located between the spring fixed terminal 702 and the spring floating retaining ring 704. When the pressure of the liquid supply chamber 101 is normal, the forced circulation wheel 5 is pressed by the spring 703 to be close to the positioning retaining ring 701; when the pressure of the liquid supply chamber 101 is too high, the pressure from the liquid supply chamber 101 forces the forced circulation wheel 5 to slide, causing the spring 703 to be compressed and deformed; then, when the pressure of the liquid supply chamber 101 decreases, the spring 703 restores its shape, forcing the spring floating retaining ring 704 and the forced circulation wheel 5 to slide toward the liquid supply chamber 101. The spring floating retaining ring 704 simultaneously plays the role of pushing the forced circulation wheel 5 and sealing.

[0024] The base 8 is located at the bottom of the box body 1 and is used to fix the entire self-powered forced circulation end-suction pump cooling device 9.

[0025] In the description of the present invention, it should be noted that the terms "bottom", "one end", "one side", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-powered forced circulation end-suction pump cooling device, comprising a housing (1) and a base (8), characterized in that: It also includes a shaft (2) and a forced circulation wheel (5); The shaft (2) is composed of an inner shaft (202) extending into the box body (1) and an outer shaft (201) outside the box body (1); The shaft (2) is assembled with the housing (1) via two bearings; The box body (1) comprises a liquid supply chamber (101) and a liquid return chamber (102) which are connected to each other; a liquid supply port (103) is arranged on the cavity wall of the liquid supply chamber (101); and a liquid return port (104) is arranged on the cavity wall of the liquid return chamber (102); A forced circulation wheel (5) is arranged on the inner shaft (202), and the forced circulation wheel (5) rotates together with the inner shaft (202); The forced circulation wheel (5) is located at the connection point between the liquid supply chamber (101) and the liquid return chamber (102); A pulley (3) is arranged on the outer shaft (201).

2. A self-powered forced circulation end suction pump cooling device according to claim 1, characterized in that: It also comprises a limiting device (7), and the forced circulation wheel (5) slides axially within the range limited by the limiting device (7).

3. A self-powered forced circulation end suction pump cooling device according to claim 2, characterized in that: The limiting device (7) comprises a positioning retaining ring (701), a spring fixed terminal (702), a spring (703), and a spring floating retaining ring (704); The positioning retaining ring (701) is located on a side of the forced circulation wheel (5) close to the liquid supply chamber (101) and is fixedly assembled with the shaft (2); The spring fixed terminal (702), the spring (703), and the spring floating retaining ring (704) are located on a side of the forced circulation wheel (5) close to the liquid return chamber (102); The spring fixed terminal (702) is fixedly mounted on the shaft (2); the spring floating retaining ring (704) is adjacent to the forced circulation wheel (5); and the spring (703) is located between the spring fixed terminal (702) and the spring floating retaining ring (704).

4. A self-powered forced circulation end suction pump cooling device according to claim 1, characterized in that: The bearing comprises a sliding bearing (602) and a rolling bearing (601); wherein the bearing close to the outer shaft (201) is the rolling bearing (601); and the bearing far from the outer shaft (201) is the sliding bearing (602).

5. A self-powered forced circulation end suction pump cooling device according to claim 4, characterized in that: It also includes a bearing cover (106) bolted to the housing (1); the housing (1) is provided with a bearing groove, and the rolling bearing (601) is installed in the bearing groove and fixed by the bearing cover (106).

6. The self-powered forced circulation end suction pump cooling device according to claim 1 is characterized in that: The housing (1) further comprises a detachable pressure cover (105) capable of removing the shaft (2) and the forced circulation wheel (5) as a whole.

7. The self-powered forced circulation end suction pump cooling device according to claim 1 is characterized in that: The outer wall of the box body is provided with fins (107).

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