Large-flow double-flow-channel multi-stage self-balancing pump
By introducing a coupling and sleeve structure into the self-balancing multistage centrifugal pump, symmetrical connection and sealing between the low-pressure zone and the high-pressure zone are achieved, solving the problems of radial vibration and leakage at high flow rates and improving the stability and sealing performance of the pump.
Patent Information
- Application Number
- CN202423316742.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing self-balancing multistage centrifugal pumps are prone to radial vibration and large leakage between low-pressure and high-pressure areas when operating at high flow rates, resulting in vibration and poor sealing.
A high-flow-rate, dual-channel, multi-stage self-balancing pump is designed. By setting an integral and sleeve structure on the outside of the pump body, symmetrical connection between the low-pressure zone and the high-pressure zone is achieved. A spiral vane and a baffle vane are set on the pump shaft to form a seal. The spiral direction is opposite to offset the radial force and reduce leakage.
It effectively reduces radial vibration, improves pump stability and sealing, avoids vibration and leakage during high-flow transportation, and extends pump service life.
Smart Images
Figure CN223594438U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to pump technical field, especially relate to a large flow double flow channel multistage self -balancing pump. BACKGROUND
[0002] Self -balancing multistage centrifugal pump is widely used, when pump operation, impeller will produce axial force, the axial force of self -balancing multistate centrifugal pump is basically all self -balancing through the installation mode of impeller back to back, and the residual axial force is borne by the thrust bearing.
[0003] Two groups of impellers installed back to back on the pump shaft are respectively arranged in the low-pressure zone and the high-pressure zone, and the pressurization mode of the liquid flow is to first pressurize the liquid flow by the impeller in the low-pressure zone and then send the liquid flow into the high-pressure zone to be pressurized again by the reversely installed impeller. The low-pressure zone and the high-pressure zone are both provided with the same pump shaft, and in order to prevent the medium from leaking from the high-pressure zone to the low-pressure zone, a throttling sleeve for preventing pressure leakage is usually arranged.
[0004] When the pump is in a large flow state, the liquid flow pressurized in the low-pressure zone is sent into the high-pressure zone, and the whole pump will swing due to the radial force, thereby generating a large vibration. In addition, the throttling sleeve on the pump shaft between the low-pressure zone and the high-pressure zone is in a rotating state, and the sleeve on the pump body is in a stationary state. Although the gap between the two sleeves is small, the high-pressure liquid flow in the high-pressure zone will flow back to the low-pressure zone through the gap, and the leakage amount formed by the pressure difference is large. TECHNICAL SOLUTION
[0005] The present application provides a large flow double flow channel multistage self-balancing pump to solve the technical problems of the radial vibration generated when the large flow liquid flow enters the high-pressure zone from the low-pressure zone and the large leakage amount at the gap of the throttling sleeve between the low-pressure zone and the high-pressure zone.
[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows: a large flow double flow channel multistage self-balancing pump, comprising a pump body, impellers and a pump shaft, the two sides of the pump body are respectively a low-pressure zone and a high-pressure zone, and the impellers in the low-pressure zone and the high-pressure zone are reversely distributed on the pump shaft, and the structural features are as follows: a pair of connecting bodies are arranged outside the pump body, a pair of connecting cavities are arranged inside the pair of connecting bodies, the pair of connecting bodies are symmetrically distributed on the two sides of the circumference of the pump body, the pair of connecting cavities communicate the low-pressure zone and the high-pressure zone, a following sleeve is arranged on the pump shaft between the low-pressure zone and the high-pressure zone, a following vane is arranged outside the following sleeve, a body sleeve is arranged inside the pump body, and a blocking piece vane is arranged inside the body sleeve.
[0007] Preferably, the following vane is a spiral strip, the following vane is spirally distributed on the outer cylindrical surface of the following sleeve, the following sleeve is coaxially arranged inside the body sleeve, the blocking piece vane inside the body sleeve is a plurality of blocking piece vanes and is also spirally distributed, and the spiral direction of the following vane is opposite to the spiral direction of the blocking piece vane.
[0008] Preferably, the pitch of the spiral vane along the outer portion of the sleeve is equal to the pitch of the spiral arrangement of the baffle vane inside the sleeve.
[0009] Preferably, the pitch of the spiral vane is gradually changed unequal pitch.
[0010] Preferably, the pitch of the spiral vane placed on one side of the high pressure area is large pitch, the pitch of the spiral vane placed on one side of the low pressure area is small pitch, and the pitch of the spiral vane is gradually changed from large pitch to small pitch.
[0011] Preferably, the pitch of the spiral arrangement of the baffle vane is equal to and corresponding to the pitch of the spiral vane.
[0012] Preferably, the cross section of the spiral vane is equal to the cross section of the baffle vane, and the included angle a of the spiral vane towards one side of the high pressure area is smaller than the included angle b of the spiral vane towards one side of the low pressure area.
[0013] Preferably, the rotation direction of the spiral vane is opposite to the rotation direction of the pump shaft and the impeller, and the pump shaft drives the rotation of the impeller, and at the same time drives the rotation of the spiral vane, so that the spiral vane pushes the liquid flow to the direction of the high pressure area.
[0014] Preferably, the pair of connecting cavities in the pair of connecting bodies are pipeline-shaped, one end of the pair of connecting cavities is connected to the liquid outlet behind the impeller in the low pressure area, and the other end of the pair of connecting cavities is connected to the liquid inlet in the high pressure area.
[0015] Preferably, the number of the pair of connecting bodies is even and evenly distributed on the circumference of the pump body, and the two pair of connecting bodies are symmetrically distributed in parallel.
[0016] The utility model discloses a beneficial effect is: the utility model discloses two the pair of bodies of symmetry is arranged between low pressure area and high pressure area, makes the connection of the passage of the liquid outlet of low pressure area and the liquid inlet of high pressure area forms the pipeline type, makes liquid flow after the pressure boost of low pressure area can be directly transported to high pressure area and continues to boost, and low pressure area and high pressure area are communicated through two the pair of bodies of symmetry, and the flow liquid mode of two the pair of bodies of symmetry can offset radial force, makes the external symmetry of pump body balanced state, avoids the radial vibration of the condition of the large flow delivery, in addition, the pump shaft and the pump body between and low pressure area and high pressure area can form the seal through the along sleeve and the body sleeve, the along sleeve and the body sleeve can form the seal between low pressure area and high pressure area through the clearance cooperation between the along vane and the blocking piece leaf, and the rotation direction of the spiral of the along vane is opposite with the rotation direction of the pump shaft and the impeller, and the along vane synchronous rotation with the pump shaft pushes liquid flow to the direction of high pressure area, avoids the large flow of liquid flow in high pressure area to low pressure area, can effectively block and reduce the water leakage of high pressure area to low pressure area. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the front view structural schematic diagram of the utility model;
[0018] Figure 2 It is the right view appearance schematic diagram of the utility model;
[0019] Figure 3 It is the plan view appearance schematic diagram of the utility model;
[0020] Figure 4 It is the Figure 1 The main view structural schematic diagram of the part enlarged of C of the utility model;
[0021] Figure 5 It is the Figure 4 The structural schematic diagram of the part enlarged of the utility model;
[0022] Figure 6 It is the right view schematic diagram of the embodiment of the utility model;
[0023] Figure 7 It is the Figure 6 The plan view schematic diagram of the embodiment of the utility model;
[0024] In the drawing: 1 pump body, 2 impeller, 3 pump shaft, 4 low pressure area, 41 liquid outlet, 5 high pressure area, 51 liquid inlet, 6 pair of bodies, 61 pair of cavities, 7 along sleeve, 71 along vane, 8 body sleeve, 81 blocking piece leaf, 9 pump water outlet, 91 pump water inlet. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not intended to limit the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application. In the embodiments, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.
[0026] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for description purposes and cannot be understood as indicating or implying relative importance.
[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be electrically connected; it can be a hydraulic oil circuit connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0028] Referring to Figures 1 to 7 The present application provides a large-flow double-flow multi-stage self-balancing pump, comprising: a pump body 1, an impeller 2, a pump shaft 3, a low-pressure area 4, a high-pressure area 5, a pair of bodies 6, a sleeve 7 and a body sleeve 8.
[0029] In the following, the partial structure and principle of the above-mentioned components according to the self-balancing pump will be described in detail.
[0030] As an example, as Figure 1 , Figure 2 , Figure 3 ,Figure 6 and Figure 7 As shown in FIG. 1 and FIG. 2, the pump body 1 is provided with one pump shaft 3 in the middle, and low pressure area 4 and high pressure area 5 are arranged on both sides of the pump body 1, and the pump shaft 3 passes through the low pressure area 4 and the high pressure area 5. The three same direction impellers 2 arranged in the low pressure area 4 and the three same phase impellers 2 arranged in the high pressure area 5 are distributed in a back-to-back manner, and the impellers 2 in the low pressure area 4 and the high pressure area 5 are reversely distributed on the pump shaft 3, and the six impellers 2 rotate synchronously with the pump shaft 3.
[0031] The two sides of the pump body 1 are provided with a pair of connecting bodies 6, and the pair of connecting bodies 6 are provided with a pair of connecting cavities 61 inside, the pair of connecting cavities 61 in the pair of connecting bodies 6 are in the form of a pipeline, and the pair of connecting bodies 6 are symmetrically distributed on both sides of the circumference of the pump body 1, and the pair of connecting cavities 61 of the two pair of connecting bodies 6 are connected with the low pressure area 4 and the high pressure area 5. One end of the pair of connecting cavities 61 is connected with the liquid outlet 41 at the rear of the impeller 2 in the low pressure area 4, and the other end of the pair of connecting cavities 61 is connected with the liquid inlet 51 in the high pressure area 5. The number of the pair of connecting bodies 6 is two and is uniformly distributed on both sides of the circumference of the pump body 1, and the two pair of connecting bodies 6 are symmetrically distributed in parallel.
[0032] In the embodiment, referring to Figure 6 and Figure 7 As shown in FIG. 1 and FIG. 2, the pump body 1 is provided with one pump shaft 3 in the middle, and low pressure area 4 and high pressure area 5 are arranged on both sides of the pump body 1, and the pump shaft 3 passes through the low pressure area 4 and the high pressure area 5. The three same direction impellers 2 arranged in the low pressure area 4 and the three same phase impellers 2 arranged in the high pressure area 5 are distributed in a back-to-back manner, and the impellers 2 in the low pressure area 4 and the high pressure area 5 are reversely distributed on the pump shaft 3, and the six impellers 2 rotate synchronously with the pump shaft 3. Figure 7 The liquid flow enters the pump inlet 91 on the low pressure area 4 of the pump body 1, is pressurized by the three impellers 2 in the low pressure area 4, and is then delivered to the pair of connecting cavities 61 of the pair of connecting bodies 6 through the liquid outlet 41 of the low pressure area 4, the pair of connecting cavities 61 and the liquid inlet 51 of the high pressure area 5 are in the form of pipeline connection, the liquid flow pressurized by the low pressure area 4 can flow into the high pressure area 5 through the pair of connecting cavities 61 and be pressurized again by the three impellers 2 in the high pressure area 5, and the liquid flow pressurized by the high pressure area 5 is discharged through the pump outlet 9 arranged above the pump body 1. The two pair of connecting bodies 6 are symmetrically arranged between the low pressure area 4 and the high pressure area 5, the liquid outlet 41 of the low pressure area 4 and the liquid inlet 51 of the high pressure area 5 are connected in the form of pipeline, the liquid flow pressurized by the low pressure area 4 can be directly delivered to the high pressure area 5 through the pair of connecting bodies 6 for continuous pressurization, the low pressure area 4 and the high pressure area 5 are connected through the two pair of connecting bodies 6, the liquid flow mode of the two pair of connecting bodies 6 can offset the radial force, the pump body 1 forms a symmetrical balance state, and the radial vibration caused by large flow delivery is avoided. When the pump is in large flow, the two pair of connecting bodies 6 can smoothly send the liquid flow pressurized in the low pressure area to the high pressure area, the pump body 1 does not swing radially or left and right, and the stability of the pump in large flow delivery is excellent.
[0033] As an example, asFigure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown in the drawings, a following sleeve 7 is arranged on the pump shaft 3 between the low pressure area 4 and the high pressure area 5, a body sleeve 8 is arranged in the pump body 1, the following sleeve 7 is sealingly and fixedly connected to the pump shaft 3, and the following sleeve 7 can rotate synchronously with the pump shaft 3; the outer circle of the body sleeve 8 is sealingly and fixedly connected in the pump body 1, and the following sleeve 7 is coaxially arranged in the body sleeve 8. The following sleeve 7 is externally provided with a following spiral vane 71, which is a spiral strip, and the following spiral vane 71 is spirally arranged on the outer cylindrical surface of the following sleeve 7, and the following spiral vane 71 can be integrally manufactured with the following sleeve 7 by lathe turning. The body sleeve 8 can be provided with a blocking piece vane 81, which can also be a spiral strip arranged in the inner hole of the body sleeve 8, or the strip of the blocking piece vane 81 can be a plurality of uniformly arranged pieces arranged in an intermittent manner. When the blocking piece vane 81 is a plurality of uniformly arranged vanes or an integral strip, the blocking piece vane 81 can be integrally manufactured with the body sleeve 8 by mechanical processing.
[0034] Referring to Figure 4 and Figure 5As shown, the pitch of the spiral vane 71 along the outer portion of the sleeve 7 is equal to the pitch of the spiral arrangement of the blocking vane 81 in the sleeve 8. The pitch of the spiral vane 71 is gradually changed unequal pitch. The pitch of the spiral vane 71 on the side of the high pressure area 5 is large pitch, the pitch of the spiral vane 71 on the side of the low pressure area 4 is small pitch, and the pitch of the spiral vane 71 is uniformly transitioned from large pitch to small pitch. The pitch of the spiral arrangement of the blocking vane 81 is the same as and corresponds to the pitch of the spiral vane 71. The spiral direction of the spiral vane 71 is opposite to the spiral direction of the blocking vane 81. The cross section of the spiral vane 71 is the same shape as the cross section of the corresponding blocking vane 81, and the included angle a of the spiral vane 71 towards the side of the high pressure area 5 is smaller than the included angle b of the spiral vane 71 towards the side of the low pressure area 4. The spiral direction of the spiral vane 71 is opposite to the rotation direction of the pump shaft 3 and the impeller 2, when the pump shaft 3 drives the impeller 2 to rotate, the pump shaft 3 synchronously drives the spiral vane 71 to rotate, so that the spiral vane 71 pushes the liquid flow to the direction of the high pressure area 5, and the reversely distributed blocking vane 81 can also push the liquid flow to the direction of the high pressure area 5, thereby avoiding the liquid flow in the high pressure area 5 from flowing to the low pressure area 4 in large amount, and effectively blocking and reducing the liquid flow from the high pressure area 5 to the low pressure area 4. The spiral vane 71 and the blocking vane 81 are gap-fitted, in order to increase the service life of the two parts, the outer surfaces thereof can be subjected to quenching and hardening treatment or carburizing treatment to improve the durability.
[0035] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A high-flow-rate dual-channel multistage self-balancing pump, comprising: The pump body comprises a pump body, an impeller, and a pump shaft. The pump body has a low-pressure zone and a high-pressure zone on its two sides, respectively. The impellers in the low-pressure and high-pressure zones are distributed in opposite directions on the pump shaft. The pump body is characterized by: a connecting body on its exterior, a connecting cavity inside the connecting body, the connecting bodies being symmetrically distributed on both sides of the circumference of the pump body, the connecting cavity connecting the low-pressure and high-pressure zones; a sleeve on the pump shaft between the low-pressure and high-pressure zones, a swivel blade on the exterior of the sleeve; a body sleeve inside the pump body, and a baffle blade inside the body sleeve.
2. The high-flow-rate dual-channel multi-stage self-balancing pump according to claim 1, characterized in that: The spiral blade is a spiral strip, and the spiral blade is spirally distributed on the outer cylindrical surface of the sleeve. The sleeve is placed inside the body sleeve in a coaxial shape. There are multiple blocking blades inside the body sleeve, which are also spirally distributed. The spiral direction of the spiral blade is opposite to that of the blocking blade.
3. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 2, characterized in that: The pitch of the spiral blades outside the sleeve is equal to the pitch of the spiral arrangement of the baffle blades inside the sleeve.
4. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 3, characterized in that: The pitch along the blade is a gradually changing pitch with unequal intervals.
5. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 4, characterized in that: The pitch of the screw along the swivel blade on the high-pressure side is a large pitch, the pitch of the screw along the swivel blade on the low-pressure side is a small pitch, and the spacing of the screw along the swivel blade is a uniform transitional spacing from large to small.
6. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 3, characterized in that: The pitch of the spiral arrangement of the baffle blades is the same as and corresponding to the pitch of the spiral blades.
7. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 6, characterized in that: The cross-section of the spiral blade has the same shape as the cross-section of the correspondingly distributed baffle blades, and the included angle α of the spiral blade facing the high-pressure area is smaller than the included angle b of the spiral blade facing the low-pressure area.
8. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 1, characterized in that: The spiral direction of the blades is opposite to the rotation direction of the pump shaft and impeller. When the pump shaft drives the impeller to rotate, it synchronously drives the blades to rotate, causing the blades to push the liquid flow towards the high-pressure zone.
9. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 1, characterized in that: The connecting cavity within the connecting body is a pipe-like passage. One end of the connecting cavity is connected to the liquid outlet at the rear of the impeller in the low-pressure zone, and the other end of the connecting cavity is connected to the liquid inlet in the high-pressure zone.
10. A high-flow-rate dual-channel multi-stage self-balancing pump according to claim 9, characterized in that: The number of the pairs of connectors is even and they are evenly distributed on the circumference of the pump body. The two pairs of connectors that are symmetrically distributed are parallel to each other.