Single-pole centrifugal pump preventing impeller from loosening

Abstract

The application discloses a single-pole centrifugal pump capable of preventing impeller from loosening, belongs to the technical field of centrifugal pumps, and comprises an impeller assembly, a driving assembly and an anti-loosening assembly. The impeller assembly comprises a volute and an impeller arranged in the volute. The driving assembly comprises a driving member and a driving shaft which is in transmission connection with the impeller and the driving member at two ends respectively. The anti-loosening assembly comprises an anti-loosening disc which is sleeved on the driving shaft, and an anti-loosening bolt which is screwed on the driving shaft and is used for fixing the impeller on the driving shaft. A sliding block is slidably arranged on the anti-loosening disc. A first wedge block and a second wedge block are slidably arranged on the impeller. The first wedge block is adapted to abut against the sliding block. The second wedge block is adapted to abut against the first wedge block. The second wedge block is adapted to push the anti-loosening bolt to be locked clockwise. The anti-loosening bolt which is likely to be loosened is pushed to rotate clockwise by the anti-loosening assembly, so that the anti-loosening bolt is fastened, thereby avoiding loosening of the anti-loosening bolt and preventing the impeller from loosening.

Description

Technical Field

[0001] The invention relates to the technical field of centrifugal pumps, in particular to a single-stage centrifugal pump capable of preventing an impeller from loosening. Background Art

[0002] The most common drive method for centrifugal pumps is to use an electric motor. The working principle of a centrifugal pump is that the motor drives the impeller. Before the pump starts running, the entire pump casing is filled with liquid, and the impeller will be immersed in the liquid. During the rotation of the impeller, the liquid in the center of the impeller is thrown to the outer edge of the impeller under the action of centrifugal force, causing the liquid to collect in the pump casing channel and eventually be discharged out of the duct. The impeller of an existing centrifugal pump is connected to the drive shaft by a nut, thereby fixing the impeller to the drive shaft. However, when the centrifugal pump is in operation, it will vibrate and shake, resulting in the risk of the nut loosening, which will cause the impeller to loosen. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] In view of the above problems and / or the problems existing in the existing single-stage centrifugal pumps, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to solve the problem that when a single-stage centrifugal pump is working, the nut becomes loose due to the vibration of the driving member, thereby causing the impeller to become loose.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a single-stage centrifugal pump that prevents an impeller from loosening, comprising: an impeller assembly, including a volute and an impeller arranged in the volute, a drive assembly, including a drive member and a drive shaft with two ends respectively connected to the impeller and the drive shaft; an anti-slip assembly, including an anti-slip disc sleeved on the drive shaft and an anti-slip bolt threadedly installed on the drive shaft and fixing the impeller on the drive shaft, a slider slidably installed on the anti-slip disc, and when the drive shaft rotates, the slider moves toward and away from the central axis of the drive shaft, and a first wedge and a second wedge are slidably installed on the impeller, the first wedge being suitable for interfering with the slider, the second wedge being suitable for interfering with the first wedge, and the second wedge being suitable for pushing the anti-slip bolt clockwise to lock.

[0007] As a preferred solution of the single-stage centrifugal pump for preventing the impeller from loosening as described in the present invention, a mounting hole is provided in the center of the anti-detachment disk, the mounting hole passes through the two end surfaces of the anti-detachment disk, the anti-detachment disk is keyed to the drive shaft, and at least one slide groove is provided inside the anti-detachment disk, and the slide groove passes through the side wall of the anti-detachment disk.

[0008] As a preferred solution of the single-stage centrifugal pump for preventing the impeller from loosening according to the present invention, the cross-section of the chute is in the shape of an arc or a rectangle.

[0009] As a preferred solution of the single-stage centrifugal pump for preventing the impeller from loosening according to the present invention, the impeller is provided with at least one water inlet hole, the water inlet hole is arranged in a one-to-one correspondence with the chute, and the water inlet hole is connected to the chute.

[0010] As a preferred solution of the unipolar centrifugal pump for preventing the impeller from loosening as described in the present invention, a threaded hole is provided at one end of the drive shaft close to the impeller, the anti-loosening bolt is threadedly installed in the threaded hole, and the anti-loosening bolt fixes the impeller to the drive shaft.

[0011] As a preferred solution of the unipolar centrifugal pump for preventing the impeller from loosening as described in the present invention, wherein: at least one through hole is provided on the drive shaft, the through hole is arranged in a one-to-one correspondence with the slide groove, one end of the through hole passes through the outer wall of the drive shaft, and the other end is connected to the threaded hole of the drive shaft.

[0012] As a preferred solution of the single-stage centrifugal pump for preventing the impeller from loosening as described in the present invention, a protrusion is provided on the circumferential surface of the end portion of the anti-loosening bolt close to the driving member, and there is at least one protrusion, and the protrusion is arranged in a one-to-one correspondence with the slide groove.

[0013] As a preferred solution of the unipolar centrifugal pump for preventing the impeller from loosening as described in the present invention, the impeller includes an impeller body and a connecting sleeve, the connecting sleeve is arranged on the end surface of the impeller body facing the driving member, the inner wall of the connecting sleeve is provided with a mounting groove and a limiting groove connected to the mounting groove, a sliding sleeve is inserted in the mounting groove, the first wedge is slidably installed in the sliding sleeve, one end of the first wedge is elastically connected to the inner wall of the sliding sleeve, and the other end extends out of the sliding sleeve and is suitable for contacting with the slider, and the slider is suitable for engaging with the limiting groove to limit the shaking of the anti-slip disc.

[0014] As a preferred solution of the single-stage centrifugal pump for preventing the impeller from loosening according to the present invention, the bottom of the sleeve extends toward the central axis of the drive shaft, the second wedge is elastically installed in the sleeve in a sliding manner, one end of the second wedge is suitable for contacting with the first wedge, and the other end extends out of the sleeve.

[0015] As a preferred solution of the single-stage centrifugal pump for preventing the impeller from loosening as described in the present invention, the end of the second wedge block close to the central axis of the drive shaft is provided with a pushing portion, the pushing portion is suitable for interfering with the protrusion, and the second wedge block is suitable for pushing the anti-loosening bolt to rotate clockwise for locking.

[0016] The beneficial effects of the present invention are as follows: the anti-slipping component pushes the anti-slipping bolt that may be loose to rotate clockwise, thereby tightening the anti-slipping bolt, thereby preventing the anti-slipping bolt from loosening and further preventing the impeller from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them:

[0018] Figure 1 Structural diagram of a single-stage centrifugal pump to prevent the impeller from loosening.

[0019] Figure 2 Diagram of the internal structure of a single-stage centrifugal pump to prevent the impeller from loosening.

[0020] Figure 3 Front view of the impeller of a single-stage centrifugal pump to prevent the impeller from loosening.

[0021] Figure 4 Exploded view of the anti-loosening assembly of a single-stage centrifugal pump to prevent the impeller from loosening.

[0022] Figure 5 An angled view of the anti-slip bolts used to prevent the impeller from coming loose on a single-stage centrifugal pump.

[0023] Figure 6 Another perspective view of the anti-loosening bolts of a single-stage centrifugal pump to prevent the impeller from loosening.

[0024] Figure 7 Structural diagram of the impeller of a single-stage centrifugal pump to prevent the impeller from loosening.

[0025] Figure 8 Rear view of the anti-loosening assembly of a single-stage centrifugal pump to prevent the impeller from loosening.

[0026] Figure 9 Structural diagram of the anti-loosening assembly of a single-stage centrifugal pump to prevent the impeller from loosening.

[0027] Figure 10 Structural diagram of the first and second wedges of a single-stage centrifugal pump to prevent the impeller from loosening. DETAILED DESCRIPTION

[0028] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0029] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application, however, can be practiced in other ways different from those described herein without departing from the scope of the present application. It is understood that variations can be made in view of what is described and understood that it would be within the skill of the art to make these changes.

[0030] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor does it mean an embodiment that is separate or selectively excluded from other embodiments.

[0031] Embodiment 1

[0032] Reference Figures 1-5 For the first embodiment of the present application, the embodiment provides a single-pole centrifugal pump for preventing the impeller from loosening, the single-pole centrifugal pump for preventing the impeller from loosening comprises an impeller assembly 100, a driving assembly 200 and an anti-loosening assembly 300, the impeller assembly 100 provides suction force for conveying liquid; the driving assembly 200 is used for driving the impeller assembly 100 to work; and the anti-loosening assembly 300 is used for preventing the impeller assembly 100 from loosening.

[0033] Specifically, the impeller assembly 100 comprises a volute 101 and an impeller 102, the volute 101 is internally provided with a containing space, and the impeller 102 is arranged in the volute 101. The impeller 102 of the embodiment is preferably a closed impeller 102. The volute 101 is provided with a water inlet 101a and a water outlet 101b. The impeller 102 rotates, and water flows into the volute 101 through the water inlet 101a and then flows out of the volute 101 through the water outlet 101b.

[0034] Preferably, the driving assembly 200 comprises a driving member 201 and a driving shaft 202. The driving member 201 of the embodiment is preferably a motor. One end of the driving shaft 202 is keyed connected to the output end of the motor, and the other end is also keyed connected to the impeller 102. The central axis of the output end of the motor coincides with the central axis of the driving shaft 202, and the central axis of the impeller 102 also coincides with the central axis of the driving shaft 202. In use, the motor drives the impeller 102 to rotate counterclockwise through the driving shaft 202.

[0035] Furthermore, the anti-slip assembly 300 includes an anti-slip disc 301 and an anti-slip bolt 302. The anti-slip disc 301 is in the shape of a cylinder. The anti-slip disc 301 is sleeved on the drive shaft 202 and is keyed to the anti-slip disc 301. The anti-slip bolt 302 is threadedly installed on the drive shaft 202. When the anti-slip bolt 302 is threadedly engaged with the drive shaft 202, the impeller 102 can be fixed on the drive shaft 202. A slider 303 is slidably installed on the anti-slip disc 301. When the drive shaft 202 rotates, the slider 303 can move towards the central axis away from the drive shaft 202 under the action of centrifugal force, and the impeller 102 is The first wedge block 304 and the second wedge block 305 are slidingly installed. The sliding trajectory of the first wedge block 304 is parallel to the circumferential surface of the anti-detachment disk 301, and the sliding direction of the second wedge block 305 is perpendicular to the circumferential tangent direction of the anti-detachment disk 301. When the slider 303 slides under the action of centrifugal force, it can conflict with the first wedge block 304 and push the first wedge block 304 to slide. The second wedge block 305 conflicts with the first wedge block 304. When the first wedge block 304 slides, it drives the second wedge block 305 to slide. The second wedge block 305 can push the anti-detachment bolt 302 to rotate clockwise to achieve a locking effect.

[0036] When in use, the driving motor drives the impeller 102 and the anti-detachment disk 301 to rotate synchronously through the driving shaft 202, and the slider 303 slides on the anti-detachment disk 301 under the action of centrifugal force. When the slider 303 slides, it conflicts with the first wedge block 304 and pushes the first wedge block 304 to slide. At the same time, the first wedge block 304 conflicts with the second wedge block 305 and pushes the second wedge block 305 to slide. The second wedge block 305 pushes the anti-detachment bolt 302 to rotate clockwise to achieve the effect of automatic locking of the anti-detachment bolt 302, and the faster the motor drives the driving shaft 202 to rotate, the tighter the self-locking of the anti-detachment bolt 302.

[0037] Example 2

[0038] Reference Figures 1-10 , which is the second embodiment of the present invention, and is based on the previous embodiment.

[0039] Specifically, an installation hole 301a is provided in the center of the anti-slip disk 301, and the installation hole 301a passes through the left and right end surfaces of the anti-slip disk 301. The central axis of the anti-slip disk 301 coincides with the central axis of the drive shaft 202. The anti-slip disk 301 is key-connected to the drive shaft 202. At least one slide groove 301b is provided inside the anti-slip disk 301, and the slide groove 301b passes through the side wall of the anti-slip disk 301. There are six slide grooves 301b in this embodiment, and the six slide grooves 301b are evenly arranged around the central axis of the anti-slip disk 301.

[0040] Preferably, the cross-sectional shape of the chute 301b is an arc or a rectangle. In this embodiment, the cross-sectional shape of the chute 301b is an arc.

[0041] Preferably, the driving shaft 202 is provided with a threaded hole near one side end of the impeller 102, and the anti-loosening bolt 302 is threadedly connected with the threaded hole, and the anti-loosening bolt 302 can fix the impeller 102 on the driving shaft 202 when being threadedly installed in the threaded hole.

[0042] Preferably, the driving shaft 202 is provided with at least one through hole on the circumferential wall, and the through hole of the embodiment is provided with six through holes, and the six through holes are one-to-one corresponding to the sliding grooves 301b, one end of the through hole penetrates through the outer wall of the driving shaft 202, and the other end is in communication with the threaded hole of the driving shaft 202.

[0043] Preferably, the anti-loosening bolt 302 is provided with a protruding portion 302a on the circumferential surface of the side end close to the driving member 201, and the protruding portion 302a is provided with at least one, and the protruding portion 302a of the embodiment is provided with six, and the protruding portion 302a is one-to-one corresponding to the sliding grooves 301b.

[0044] Further, the impeller 102 comprises an impeller body 102b and a connecting sleeve 102c, the impeller body 102b and the connecting sleeve 102c are integrally formed, the connecting sleeve 102c is arranged on the side end surface of the impeller body 102b facing the driving member 201, the central axis of the connecting sleeve 102c coincides with the central axis of the driving shaft 202, the inner wall of the connecting sleeve 102c is provided with an installation groove 102c-1 and a limiting groove 102c-2, the limiting groove 102c-2 is in communication with the installation groove 102c-1, a sliding sleeve 306 is inserted in the installation groove 102c-1, the sliding sleeve 306 is hollow inside, and the left end and the bottom are both provided with openings, a first wedge block 304 is slidingly installed in the sliding sleeve 306, the right end of the first wedge block 304 is elastically connected with the inner wall of the sliding sleeve 306 through a first spring 307, and the left end can extend out of the sliding sleeve 306 and can abut against the sliding block 303, and when the sliding block 303 slides to the limit position, the first wedge block 304 can be clamped with the limiting groove 102c-2 to stabilize the anti-loosening disc 301 and limit the shaking of the anti-loosening disc 301, at this time, the sliding block 303 no longer pushes the first wedge block 304, that is, the limiting groove 102c-2 can also limit the moving position of the second wedge block 305.

[0045] Further, the bottom of the sliding sleeve 306 extends towards the central axis of the driving shaft 202, the second wedge block 305 is slidingly and elastically installed in the sliding sleeve 306, the top of the second wedge block 305 can abut against the first wedge block 304, and the bottom can extend out of the sliding sleeve 306, and the part of the second wedge block 305 located in the sliding sleeve 306 is sleeved with a second spring 308.

[0046] Further, the end of the second wedge block 305 close to the central axis of the driving shaft 202 is provided with a pushing part 305a, the pushing part 305a can be in contact with the protruding part 302a, the second wedge block 305 can push the anti-loose bolt 302 to rotate clockwise to be locked, the pushing part 305a and the protruding part 302a are both provided in an inclined manner, the cross section of the protruding part 302a is a right triangle, the inclined surface of the protruding part 302a is parallel to the inclined surface of the pushing part 305a, the protruding part 302a not only plays a role of being in contact with the pushing part 305a, but also plays a role of limiting the pushing stroke of the pushing part 305a7, preventing the pushing part 305a from sliding off the protruding part 302a after being pushed to the limit position.

[0047] In use, the driving motor drives the impeller 102 and the anti-loose disc 301 to rotate synchronously through the driving shaft 202, the sliding block 303 is pushed to slide on the anti-loose disc 301 under the action of centrifugal force, the sliding block 303 is in contact with the first wedge block 304 when sliding and pushes the first wedge block 304 to slide, when the sliding block 303 slides to the limit position, the sliding block 303 is clamped with the limiting groove 102c-2 to stabilize the anti-loose disc 301, the first wedge block 304 is in contact with the second wedge block 305 and pushes the second wedge block 305 to slide, the second wedge block 305 passes through the through hole and is in contact with the protruding part 302a of the anti-loose bolt 302, the second wedge block 305 pushes the anti-loose bolt 302 to rotate clockwise to complete the self-locking of the anti-loose bolt 302, thereby preventing the impeller 102 from loosening.

[0048] Embodiment 3

[0049] Reference Figures 1-10 For the third embodiment of the present application, the embodiment is based on the previous two embodiments.

[0050] Specifically, the impeller 102 of the present embodiment is provided with at least one water inlet hole 102a, the water inlet hole 102a is provided in one-to-one correspondence with the sliding groove 301b, the present embodiment is provided with six water inlet holes 102a, the water inlet hole 102a is in communication with the sliding groove 301b, when the impeller 102 rotates, the water flow enters the volute 101 from the water inlet 101a, the impeller 102 continuously rotates, the water flow always has a tendency to move towards the impeller 102, therefore the water flow can enter the sliding groove 301b through the water inlet hole 102a, the sliding block 303 of the present embodiment is preferably a rubber block to avoid water leakage, the sliding block 303 can slide under the push of the water flow, the sliding block 303 can push the first wedge block 304 and the second wedge block 305 to slide under the joint action of the centrifugal force and the water flow, thereby pushing the anti-loose bolt 302 to rotate clockwise to complete the self-adaptive locking, the locking speed is faster and the effect is better.

[0051] Preferably, the connecting sleeve 102c of the impeller 102 is fixed with a cover 103 towards the end of the motor, the cover 103 is also sleeved on the driving shaft 202, and the driving shaft 202 is also provided with a mechanical seal, which is a conventional component known to those skilled in the art, and thus will not be described again. The mechanical seal is in abutment with the cover 103 to avoid water leakage.

[0052] In use, the driving motor drives the impeller 102 and the anti-disengagement disc 301 to rotate synchronously through the driving shaft 202, and the water flow always has a tendency to move towards the impeller 102. The water flow enters the chute 301b through the water inlet hole 102a and continuously pushes the sliding block 303 to slide. Under the combined action of the centrifugal force and the water flow, the sliding block 303 can push the first wedge block 304 and the second wedge block 305 to slide.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A single-stage centrifugal pump for preventing the impeller from loosening, characterized in that: include, An impeller assembly (100) comprises a volute (101) and an impeller (102) disposed in the volute (101). A drive assembly (200) comprising a drive member (201) and a drive shaft (202) with two ends respectively connected to the impeller (102) and the drive member (201); An anti-slip assembly (300) comprises an anti-slip disc (301) sleeved on the drive shaft (202) and an anti-slip bolt (302) threadedly mounted on the drive shaft (202) and fixing the impeller (102) on the drive shaft (202); a slider (303) is slidably mounted on the anti-slip disc (301); when the drive shaft (202) rotates, the slider (303) moves away from the central axis of the drive shaft (202); a first wedge (304) and a second wedge (305) are slidably mounted on the impeller (102); the first wedge (304) is adapted to abut against the slider (303); the second wedge (305) is adapted to abut against the first wedge (304); and the second wedge (305) is adapted to push the anti-slip bolt (302) clockwise to lock; The sliding track of the first wedge block (304) is parallel to the circumferential surface of the anti-slip disc (301), and the sliding direction of the second wedge block (305) is perpendicular to the circumferential tangent direction of the anti-slip disc (301).

2. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 1, characterized in that: A mounting hole (301a) is provided at the center of the anti-slip disc (301), and the mounting hole (301a) passes through both end surfaces of the anti-slip disc (301). The anti-slip disc (301) is key-connected to the drive shaft (202). At least one slide groove (301b) is provided inside the anti-slip disc (301), and the slide groove (301b) passes through the side wall of the anti-slip disc (301).

3. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 2, characterized in that: The cross-sectional shape of the sliding groove (301b) is arc-shaped or rectangular.

4. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 3, characterized in that: At least one water inlet hole (102a) is provided on the impeller (102), the water inlet hole (102a) and the chute (301b) are arranged in a one-to-one correspondence, and the water inlet hole (102a) is communicated with the chute (301b).

5. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 3 or 4, characterized in that: A threaded hole is provided at one end of the drive shaft (202) close to the impeller (102), and the anti-slip bolt (302) is threadedly installed in the threaded hole. The anti-slip bolt (302) fixes the impeller (102) on the drive shaft (202).

6. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 5, characterized in that: At least one through hole is provided on the driving shaft (202), and the through hole is arranged in a one-to-one correspondence with the sliding groove (301b), one end of the through hole passes through the outer wall of the driving shaft (202), and the other end is connected to the threaded hole of the driving shaft (202).

7. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 6, characterized in that: A protrusion (302a) is provided on the circumferential surface of the end portion of the anti-slip bolt (302) close to the driving member (201), and at least one protrusion (302a) is provided. The protrusion (302a) is arranged in a one-to-one correspondence with the sliding groove (301b).

8. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 6, characterized in that: The impeller (102) comprises an impeller body (102b) and a connecting sleeve (102c), wherein the connecting sleeve (102c) is arranged on a side end face of the impeller body (102b) facing the driving member (201), and an installation groove (102c-1) and a limiting groove (102c-2) connected to the installation groove (102c-1) are provided on the inner wall of the connecting sleeve (102c), a sliding sleeve (306) is inserted into the installation groove (102c-1), and the first wedge block (304) is slidably installed in the sliding sleeve (306), one end of the first wedge block (304) is elastically connected to the inner wall of the sliding sleeve (306), and the other end extends out of the sliding sleeve (306) and is suitable for contacting the slider (303), and the slider (303) is suitable for being engaged with the limiting groove (102c-2) to limit the shaking of the anti-slip disc (301).

9. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 8, characterized in that: The bottom of the sliding sleeve (306) extends toward the central axis of the drive shaft (202), and the second wedge block (305) is elastically installed in the sliding sleeve (306) in a sliding manner. One end of the second wedge block (305) is suitable for contacting the first wedge block (304), and the other end extends out of the sliding sleeve (306).

10. The single-stage centrifugal pump for preventing the impeller from loosening according to claim 7, characterized in that: The end of the second wedge block (305) close to the central axis of the drive shaft (202) is provided with a pushing portion (305a), and the pushing portion (305a) is suitable for contacting with the protruding portion (302a). The second wedge block (305) is suitable for pushing the anti-slip bolt (302) to rotate clockwise for locking.

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