Anti-blocking rotor for double-screw pump

Abstract

The utility model discloses an anti-blocking rotor for a double-screw pump, which comprises a shell, a driving rotor and a driven rotor, the driving rotor and the driven rotor are two screws which are opposite in spiral direction and meshed with each other, and four connecting mechanisms are fixed in the shell. And the left and right ends of the driving rotor and the left and right ends of the driven rotor are connected with the four connecting mechanisms respectively, swing back and forth and are rotationally arranged in the shell. The front-back swing in the shell is realized through the connecting mechanism, so that when impurities or particles are clamped in, the driving rotor and the driven rotor can be far away from each other to enable the impurities to pass through, and the risk of blockage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of screw pumps, specifically to an anti-clogging rotor for a twin-screw pump. Background Technology

[0002] As a type of positive displacement rotary pump, the twin-screw pump works by drawing in and discharging liquid through the volume change of the sealed cavity formed by the screw and bushing. However, when conveying liquid media containing impurities or particles with high hardness, these impurities or particles can become stuck between the two rotors of the twin-screw pump, causing blockages that prevent the rotors from rotating properly and affecting its normal operation. This blockage can also easily cause wear on the rotor surfaces. Utility Model Content

[0003] The purpose of this invention is to provide an anti-clogging rotor for a twin-screw pump. This rotor swings back and forth within the housing through a connecting mechanism, so that when impurities or particles get stuck, the active rotor and the driven rotor can move away from each other to allow the impurities to pass through, reducing the risk of clogging.

[0004] The technical solution adopted by this utility model to solve the above problems is:

[0005] An anti-clogging rotor for a twin-screw pump includes a housing, a driving rotor, and a driven rotor. The driving rotor and the driven rotor are two screws with opposite helical directions and meshing with each other. Four connecting mechanisms are fixed inside the housing. The left and right ends of the driving rotor and the left and right ends of the driven rotor are respectively connected to the four connecting mechanisms and are oscillating and rotating inside the housing.

[0006] In the above technical solution, preferably, the connecting mechanism includes an outer ring and an inner ring. The inner rings of the two connecting mechanisms are fixed to the left and right ends of the active rotor, while the outer rings are rotatably disposed within the housing. The inner rings of the other two connecting mechanisms are fixed to the left and right ends of the driven rotor, while the outer rings are rotatably disposed within the housing. The outer ring and the inner ring are connected by a number of buffer mechanisms arranged at equal intervals in a circle. The length of the buffer mechanism is adjustable and it can automatically recover.

[0007] In the above technical solution, preferably, the buffer mechanism includes a rod and a sleeve. The rod is slidably inserted into the sleeve, and a spring is sleeved between the rod and the sleeve. The two ends of the spring abut against the rod and the sleeve respectively. The outer end of the sleeve is hinged to the outer ring for left and right rotation, and the inner end of the rod is hinged to the inner ring for front and back rotation.

[0008] In the above technical solution, preferably, the right end of the active rotor is provided with an active rod, the right end of the driven rotor is provided with a driven rod, both the active rod and the driven rod extend out of the housing from the right side of the housing and are rotatably mounted on the housing, the outer ring of the connecting mechanism at the right end of the active rotor is fixedly connected to the active rod, and the outer ring of the connecting mechanism at the right end of the driven rotor is fixedly connected to the driven rod.

[0009] In the above technical solution, preferably, the driving rod and the driven rod are fitted with meshing gears.

[0010] In the above technical solution, preferably, both the driving rod and the driven rod are rotatably mounted on the housing via bearings.

[0011] In the above technical solution, preferably, a shaft seal is provided between the driving rod and the driven rod and the housing, and the shaft seal is located between the bearing and the internal cavity of the housing.

[0012] Compared with the prior art, this utility model has the following advantages and effects:

[0013] In this invention, the meshing active rotor and driven rotor are oscillating and rotating within the housing via a connecting mechanism. Therefore, when impurities or particles of high hardness become stuck between the active rotor and driven rotor, the active rotor and driven rotor can move away from each other in opposite directions, allowing the impurities or particles to pass through between them. This reduces the risk of the active rotor and driven rotor becoming stuck and unable to rotate normally, thus reducing the wear on the surfaces of the active rotor and driven rotor caused by impurities or particles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the anti-clogging rotor for a twin-screw pump according to an embodiment of this utility model.

[0015] Figure 2 yes Figure 1 A top-down view of the internal structure.

[0016] Figure 3 yes Figure 2 Side view of the connecting mechanism.

[0017] Figure 4 yes Figure 3 Enlarged view of the buffer mechanism.

[0018] The components include: housing 1, driving rotor 2, driving rod 21, gear 22, bearing 23, shaft seal 24, driven rotor 3, driven rod 31, connecting mechanism 4, outer ring 41, inner ring 42, buffer mechanism 43, insertion rod 44, sleeve 45, and spring 46. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0020] See Figure 1-Figure 4 This embodiment provides an anti-clogging rotor for a twin-screw pump, comprising a housing 1, a driving rotor 2, and a driven rotor 3. The driving rotor 2 and the driven rotor 3 are two screws with opposite helical directions and meshing with each other. Four connecting mechanisms 4 are fixed inside the housing 1. The left and right ends of the driving rotor 2 and the left and right ends of the driven rotor 3 are connected to the four connecting mechanisms 4 respectively and are oscillating and rotating inside the housing 1.

[0021] In this invention, the meshing active rotor 2 and driven rotor 3 are oscillating and rotating within the housing 1 via a connecting mechanism 4. Therefore, when the active rotor 2 and driven rotor 3 are driven to rotate simultaneously to transport liquid media, and impurities or particles with high hardness in the media become stuck between the active rotor 2 and driven rotor 3, the active rotor 2 and driven rotor 3 can move away from each other in opposite directions, allowing the impurities or particles to pass through between them. This reduces the risk of the active rotor 2 and driven rotor 3 becoming stuck and unable to rotate normally, thus ensuring the normal operation of the twin screw pump. It also reduces the wear of impurities or particles on the surfaces of the active rotor 2 and driven rotor 3, improving their lifespan.

[0022] See Figure 3 The connecting mechanism 4 includes an outer ring 41 and an inner ring 42. The inner rings 42 of the two connecting mechanisms 4 are fixed to the left and right ends of the active rotor 2, while the outer rings 41 are rotatably disposed inside the housing 1. The inner rings 42 of the other two connecting mechanisms 4 are fixed to the left and right ends of the driven rotor 3, while the outer rings 41 are rotatably disposed inside the housing 1. The outer rings 41 and the inner rings 42 are connected by a number of buffer mechanisms 43 arranged at equal intervals in a circle. The length of the buffer mechanism 43 is adjustable and can automatically recover.

[0023] When impurities or particles get stuck between the active rotor 2 and the driven rotor 3, the active rotor 2 and the driven rotor 3 are subjected to thrust. At this time, the inner ring 42, which is fixed to the active rotor 2 and the driven rotor 3, moves within the outer ring 41 under the action of the extension and shortening of several buffer mechanisms 43, thereby realizing the separation between the active rotor 2 and the driven rotor 3. After the impurities or particles pass through between the active rotor 2 and the driven rotor 3, the inner ring 42 is reset under the action of the buffer mechanism 43, so that the distance between the active rotor 2 and the driven rotor 3 is restored to the initial value, ensuring the normal operation of this utility model.

[0024] See Figure 3 , Figure 4The buffer mechanism 43 includes a rod 44 and a sleeve 45. The rod 44 is slidably inserted into the sleeve 45. A spring 46 is sleeved between the rod 44 and the sleeve 45. The two ends of the spring 46 abut against the rod 44 and the sleeve 45 respectively. The outer end of the sleeve 45 is hinged to the outer ring 41 for left and right rotation, and the inner end of the rod 44 is hinged to the inner ring 42 for back and forth rotation.

[0025] The length of the buffer mechanism 43 is adjusted by sliding the insert rod 44 within the sleeve 45, and the insert rod 44 is driven to separate from the sleeve 45 under the action of the spring 46. Since several buffer mechanisms 43 are arranged circumferentially and equally between the inner ring 42 and the outer ring 41, and the two ends of the buffer mechanism 43 are hinged to the inner ring 42 and the outer ring 41 in the forward and backward rotation and left and right rotation directions respectively, the inner ring 42 can move in multiple angles in the vertical plane and move left and right at the same time. Under the action of the spring 46, the inner ring 42 can be reset to the position concentric with the outer ring 41, thereby improving the flexibility of the movement of the active rotor 2 and the driven rotor 3 and increasing the probability that impurities or particles can pass smoothly between the active rotor 2 and the driven rotor 3.

[0026] See Figure 1 , Figure 2 The right end of the active rotor 2 is provided with an active rod 21, and the right end of the driven rotor 3 is provided with a driven rod 31. Both the active rod 21 and the driven rod 31 extend from the right side of the housing 1 and are rotatably mounted on the housing 1. The outer ring 41 of the connecting mechanism 4 at the right end of the active rotor 2 is fixedly connected to the active rod 21, and the outer ring 41 of the connecting mechanism 4 at the right end of the driven rotor 3 is fixedly connected to the driven rod 31.

[0027] By setting a drive device (e.g., a motor) on the outside of the housing 1 to drive the active rod 21 and the driven rod 31 to rotate, the outer ring 41 of the connecting mechanism 4 is driven to rotate. Under the action of the buffer mechanism 43, the outer ring 41 drives the inner ring 42 to rotate, thereby driving the active rotor 2 and the driven rotor 3 to rotate, thus realizing the function of conveying liquid medium of this utility model. The drive device is set on the outside of the housing 1 to avoid the risk of liquid medium entering the drive device and causing short circuit. Furthermore, the drive device and this utility model can be disassembled and separated, which is convenient for the installation and maintenance of this utility model.

[0028] See Figure 1 , Figure 2 The driving rod 21 and the driven rod 31 are fitted with meshing gears 22.

[0029] When the drive device drives the active rod 21 to rotate, the active rod 21 can drive the driven rod 31 to rotate simultaneously under the action of the gear 22, thereby reducing the number of drive devices required and ensuring that the active rotor 2 and the driven rotor 3 can rotate at the same speed and maintain meshing, thus improving the working stability of the active rotor 2 and the driven rotor 3.

[0030] See Figure 2 The driving rod 21 and the driven rod 31 are both rotatably mounted on the housing 1 via bearings 23.

[0031] By using bearing 23, the resistance of the driving rod 21 and driven rod 31 when rotating within the housing 1 is reduced, the heat generated by friction during the rotation of the driving rod 21 and driven rod 31 is reduced, and the wear of the driving rod 21 and driven rod 31 is reduced, thereby improving the service life of this utility model.

[0032] See Figure 2 A shaft seal 24 is provided between the driving rod 21 and the driven rod 31 and the housing 1. The shaft seal 24 is located between the bearing 23 and the internal cavity of the housing 1.

[0033] The shaft seal 24 seals the connection between the driving rod 21 and the driven rod 31 and the housing 1, reducing the risk of liquid leakage from the housing 1 through the driving rod 21 and the driven rod 31 during operation.

[0034] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A clog-resistant rotor for a twin-screw pump, characterized in that: It includes a housing, a driving rotor, and a driven rotor. The driving rotor and the driven rotor are two screws with opposite helical directions and meshing with each other. Four connecting mechanisms are fixed inside the housing. The left and right ends of the driving rotor and the left and right ends of the driven rotor are respectively connected to the four connecting mechanisms and swing back and forth and rotate inside the housing.

2. The anti-clogging rotor for a twin-screw pump according to claim 1, characterized in that: The connecting mechanism includes an outer ring and an inner ring. The inner rings of the two connecting mechanisms are fixed to the left and right ends of the active rotor, while the outer rings are rotatably disposed within the housing. The inner rings of the other two connecting mechanisms are fixed to the left and right ends of the driven rotor, while the outer rings are rotatably disposed within the housing. The outer ring and the inner ring are connected by several buffer mechanisms arranged at equal intervals in a circle. The length of the buffer mechanism is adjustable and it can automatically recover.

3. The anti-clogging rotor for a twin-screw pump according to claim 2, characterized in that: The buffer mechanism includes a rod and a sleeve. The rod is slidably inserted into the sleeve, and a spring is sleeved between the rod and the sleeve. The two ends of the spring abut against the rod and the sleeve, respectively. The outer end of the sleeve is hinged to the outer ring for left and right rotation, and the inner end of the rod is hinged to the inner ring for back and forth rotation.

4. The anti-clogging rotor for a twin-screw pump according to claim 1, characterized in that: The active rotor is provided with an active rod at its right end, and the driven rotor is provided with a driven rod at its right end. Both the active rod and the driven rod extend out of the housing from the right side of the housing and are rotatably mounted on the housing. The outer ring of the connecting mechanism at the right end of the active rotor is fixedly connected to the active rod, and the outer ring of the connecting mechanism at the right end of the driven rotor is fixedly connected to the driven rod.

5. The anti-clogging rotor for a twin-screw pump according to claim 4, characterized in that: The driving rod and the driven rod are fitted with meshing gears.

6. The anti-clogging rotor for a twin-screw pump according to claim 4, characterized in that: Both the driving rod and the driven rod are rotatably mounted on the housing via bearings.

7. The anti-clogging rotor for a twin-screw pump according to claim 4, characterized in that: A shaft seal is provided between the driving rod and the driven rod and the housing, and the shaft seal is located between the bearing and the internal cavity of the housing.

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