Double bearing plunger pump

Abstract

The utility model discloses a double-bearing plunger pump, comprising: a plunger pump body, a motor mounted on the plunger pump body, and an eccentric piece mounted on the motor output shaft and extending into the interior of the plunger pump body, the end of the eccentric piece away from the motor passes through a first bearing arranged eccentrically with the motor output shaft and matched with the plunger pump body, the end of the eccentric piece away from the first bearing is assembled on the plunger pump body through a second bearing arranged coaxially with the motor output shaft, the first bearing and the second bearing can effectively support and disperse the load generated during the operation of the plunger pump to reduce wear and deformation, extend the service life, improve the stability and durability of the plunger pump, reduce the vibration and noise generated during the operation of the plunger pump, the first bearing and the second bearing can more effectively transmit and distribute torque, help to extend the service life of the plunger pump, so that the plunger pump can be suitable for fields requiring high precision and high stability.

Description

Technical Field

[0001] The utility model relates to the technical field related to plunger pumps, and in particular to a double-bearing plunger pump. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the pump body to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment.

[0003] my country's utility model patent "Micro Plunger Pump" with publication number CN217926182U discloses a micro plunger pump, which is equipped with a plunger, a motor and an eccentric wheel. The eccentric wheel synchronously drives the bearing to rotate in a circle. Since the bearing is embedded in the plunger, the bearing can drive the plunger to reciprocate, and then the reciprocating push of the plunger can realize the entry and exit of the liquid.

[0004] However, the above patent still has the following shortcomings: when the motor drives the eccentric wheel to rotate, centrifugal force will be generated due to the eccentric setting, and the eccentric wheel is only connected to a single bearing. The centrifugal force will accelerate the wear of the bearing, thereby affecting the stroke accuracy of the plunger. After the bearing is worn, the vibration and noise will also increase during the operation of the plunger pump. Therefore, it is necessary to design a double-bearing plunger pump. Utility Model Content

[0005] In view of the above technical problems, the purpose of the utility model is to overcome the problem in the prior art that a single bearing is easily worn and thus affects the accuracy and operating state of the plunger pump.

[0006] In order to achieve the above object, the utility model provides a double-bearing plunger pump, comprising: a plunger pump body, a motor mounted on the plunger pump body, and an eccentric member mounted on the motor output shaft and extending into the interior of the plunger pump body;

[0007] The end of the eccentric piece away from the motor passes through a first bearing arranged eccentrically with the motor output shaft and matched with the plunger pump body, and the end of the eccentric piece away from the first bearing is assembled on the plunger pump body through a second bearing arranged coaxially with the motor output shaft.

[0008] Preferably, a stirring paddle located outside the plunger pump body is fixedly mounted on the output shaft of the motor.

[0009] Preferably, the plunger pump body includes a pump body, a plunger slidably mounted on the inner axial direction of the pump body and perpendicular to the axial direction of the motor output shaft, and a pair of one-way valves assembled on the pump body, the first bearing is slidably connected to the plunger, and the second bearing is assembled on the pump body.

[0010] Preferably, the fixing sleeve on the first bearing is provided with a connecting sleeve arranged coaxially, and the plunger is recessed with a mounting groove matching the connecting sleeve.

[0011] Preferably, the mounting groove is located in the middle of the plunger.

[0012] Preferably, the motor is fixedly mounted on the outer wall of the plunger pump body via a mounting bracket.

[0013] Preferably, the eccentric piece includes a first cylindrical portion fixedly connected coaxially with the motor output shaft and fixedly connected to the inner ring of the second bearing, and a second cylindrical portion fixedly assembled on the end of the first cylindrical portion away from the motor and arranged eccentrically from the first cylindrical portion, and the inner ring of the first bearing is fixedly sleeved on the second cylindrical portion.

[0014] According to the above technical scheme, a dual-bearing plunger pump provided by the utility model has the following beneficial effects when in use: first, the first bearing and the second bearing can effectively support and disperse the load generated during the operation of the plunger pump to reduce wear and deformation and extend the service life, and the simultaneous use of the first bearing and the second bearing can improve the stability and durability of the plunger pump and reduce the vibration and noise generated during the operation of the plunger pump.

[0015] Secondly, the first bearing and the second bearing can transmit and distribute torque more effectively, improve the torque transmission path, reduce stress concentration, and thus reduce the pressure borne by the first bearing and the second bearing individually. The optimized torque distribution helps to extend the service life of the plunger pump, making the plunger pump suitable for fields requiring high precision and high stability, such as smoke machine pumping devices, industrial fluid delivery systems, etc., enhancing the adaptability of the plunger pump under various complex working conditions and broadening its application prospects.

[0016] Thirdly, the cooperation between the first bearing and the second bearing can reduce the runout and vibration of the motor output shaft and the eccentric, thereby ensuring that the plunger pump can operate smoothly under high speed or high pressure conditions. A more stable operating state helps to improve the control accuracy of flow and pressure.

[0017] Fourthly, the durability of the design of the first bearing and the second bearing enables the plunger pump to maintain good performance under high load and long-term operation, reducing downtime and maintenance costs, reducing the need for frequent replacement and repairs, and reducing the failure rate and maintenance costs of the plunger pump under high load and high-frequency use, thereby improving overall work efficiency, improving the overall reliability of the plunger pump, and reducing energy consumption and operating costs.

[0018] Fifth, the structure of the first bearing and the second bearing makes the pump easier to disassemble and assemble during maintenance and servicing, reducing the complexity and time required for maintenance.

[0019] Other features and advantages of the utility model will be described in detail in the subsequent specific implementation mode; and the parts not involved in the utility model are the same as the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a double-bearing plunger pump provided by the present invention;

[0022] Figure 2 This is a partial three-dimensional structure diagram of a double-bearing plunger pump provided by the present invention. Figure 1 ;

[0023] Figure 3 This is a partial three-dimensional structure diagram of a double-bearing plunger pump provided by the present invention. Figure 2 .

[0024] Description of Reference Numerals

[0025] 1. Motor; 2. Eccentric piece; 3. First bearing; 4. Connecting sleeve; 5. Second bearing; 6. Agitator paddle; 7. Pump body; 8. Plunger; 9. Mounting frame; 10. Mounting groove. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0027] In the present utility model, unless otherwise stated, directional words such as "upper, lower, inside, outside" contained in a term merely represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0028] like Figure 1-3 As shown, a double-bearing plunger pump comprises: a plunger pump body, a motor 1 mounted on the plunger pump body, and an eccentric member 2 mounted on the output shaft of the motor 1 and extending into the interior of the plunger pump body;

[0029] The end of the eccentric member 2 away from the motor 1 passes through a first bearing 3 which is arranged eccentrically with the output shaft of the motor 1 and matches with the plunger pump body. The end of the eccentric member 2 away from the first bearing 3 is assembled on the plunger pump body through a second bearing 5 which is arranged coaxially with the output shaft of the motor 1.

[0030] The motor 1 starts to drive the eccentric piece 2 to rotate, and the eccentric piece 2 drives the first bearing 3 to rotate around the axis of the output shaft of the motor 1, thereby driving the plunger pump body to work.

[0031] The first bearing 3 and the second bearing 5 can effectively support and disperse the load generated during the operation of the plunger pump to reduce wear and deformation and extend the service life. The simultaneous use of the first bearing 3 and the second bearing 5 can improve the stability and durability of the plunger pump and reduce the vibration and noise generated during the operation of the plunger pump.

[0032] The first bearing 3 and the second bearing 5 can transmit and distribute torque more effectively, improve the torque transmission path, reduce stress concentration, and thus reduce the pressure borne by the first bearing 3 and the second bearing 5 individually. The optimized torque distribution helps to extend the service life of the plunger pump, so that the plunger pump can be used in fields requiring high precision and high stability, such as smoke machine pumping devices, industrial fluid delivery systems, etc., which enhances the adaptability of the plunger pump under various complex working conditions and broadens its application prospects.

[0033] The cooperation between the first bearing 3 and the second bearing 5 can reduce the runout and vibration of the output shaft of the motor 1 and the eccentric member 2, thereby ensuring that the plunger pump can run smoothly under high speed or high pressure conditions. A more stable operation state helps to improve the control accuracy of flow and pressure.

[0034] The durability of the design of the first bearing 3 and the second bearing 5 enables the plunger pump to maintain good performance under high load and long-term operation, reduces downtime and maintenance costs, reduces the need for frequent replacement and repair, reduces the failure rate and maintenance costs of the plunger pump under high load and high frequency use, improves the overall work efficiency, improves the overall reliability of the plunger pump, and can reduce energy consumption and operating costs.

[0035] The structure of the first bearing 3 and the second bearing 5 makes it easier to disassemble and assemble the pump during maintenance and care, thereby reducing the complexity and time required for maintenance.

[0036] The output shaft of the motor 1 is fixedly equipped with a stirring paddle 6 located outside the plunger pump body.

[0037] The output shaft of the motor 1 can drive the agitator 6 to rotate while driving the plunger pump body to work. The unique design makes the plunger pump with the agitator 6 have significant advantages in industrial applications.

[0038] Because assembling the stirring paddle 6 will extend the length of the output shaft of the motor 1, and the eccentric piece 2 is located at the end of the output shaft of the motor 1, it will require higher torque at the end of the output shaft of the motor 1, and the first bearing 3 and the second bearing 5 can more effectively transmit and distribute the torque, improve the torque transmission path, and reduce the stress concentration phenomenon.

[0039] The plunger pump body includes a pump body 7, a plunger 8 slidably mounted in the pump body 7 with an axial direction perpendicular to the axial direction of the output shaft of the motor 1, and a pair of one-way valves assembled on the pump body 7, the first bearing 3 is slidably connected to the plunger 8, and the second bearing 5 is assembled on the pump body 7.

[0040] The output shaft of the motor 1 drives the first bearing 3 to rotate around the axis of the output shaft of the motor 1 through the eccentric member 2, thereby driving the plunger 8 to slide back and forth in the pump body 7, driving the plunger pump body to operate normally.

[0041] A connecting sleeve 4 is coaxially arranged on the fixed sleeve of the first bearing 3 , and a mounting groove 10 matching the connecting sleeve 4 is recessed on the plunger 8 .

[0042] The connecting sleeve 4 is slidably inserted into the installation groove 10. When the connecting sleeve 4 rotates around the axis of the output shaft of the motor 1, the force is transmitted to the side wall of the installation groove 10 through the connecting sleeve 4, thereby driving the plunger 8 to slide back and forth in the pump body 7.

[0043] The mounting groove 10 is located in the middle of the plunger 8, which can further improve the stability of the plunger pump during operation.

[0044] The motor 1 is fixedly mounted on the outer wall of the plunger pump body through a mounting bracket 9 .

[0045] The eccentric piece 2 includes a first cylindrical portion fixedly connected coaxially with the output shaft of the motor 1 and fixedly connected to the inner ring of the second bearing 5, and a second cylindrical portion fixedly assembled on the end of the first cylindrical portion away from the motor 1 and arranged eccentrically from the first cylindrical portion, and the inner ring of the first bearing 3 is fixedly sleeved on the second cylindrical portion.

[0046] The output shaft of the motor 1 drives the first cylindrical part to rotate, and the first cylindrical part drives the second cylindrical part to rotate around the axis of the first cylindrical part, and drives the connecting sleeve 4 to rotate around the axis of the first cylindrical part through the first bearing 3.

[0047] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0048] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0049] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A double-bearing plunger pump, characterized in that: include: A plunger pump body, a motor (1) mounted on the plunger pump body, and an eccentric piece (2) mounted on the output shaft of the motor (1) and extending into the interior of the plunger pump body; The end of the eccentric member (2) away from the motor (1) passes through a first bearing (3) arranged eccentrically with the output shaft of the motor (1) and matched with the plunger pump body, and the end of the eccentric member (2) away from the first bearing (3) is assembled on the plunger pump body through a second bearing (5) arranged coaxially with the output shaft of the motor (1).

2. A dual-bearing plunger pump according to claim 1, characterized in that: A stirring paddle (6) located outside the plunger pump body is fixedly mounted on the output shaft of the motor (1).

3. A dual-bearing plunger pump according to claim 1, characterized in that: The plunger pump body comprises a pump body (7), a plunger (8) slidably mounted in the pump body (7) with its internal axial direction perpendicular to the axial direction of the output shaft of the motor (1), and a pair of one-way valves mounted on the pump body (7), the first bearing (3) being slidably connected to the plunger (8), and the second bearing (5) being mounted on the pump body (7).

4. A dual-bearing plunger pump according to claim 3, characterized in that: The fixed sleeve on the first bearing (3) is provided with a connecting sleeve (4) arranged coaxially, and the plunger (8) is recessed with a mounting groove (10) matching the connecting sleeve (4).

5. A dual-bearing plunger pump according to claim 4, characterized in that: The mounting groove (10) is located in the middle of the plunger (8).

6. A dual-bearing plunger pump according to claim 1, characterized in that: The motor (1) is fixedly mounted on the outer wall of the plunger pump body via a mounting frame (9).

7. A dual-bearing plunger pump according to claim 1, characterized in that: The eccentric member (2) comprises a first cylindrical portion fixedly connected coaxially with the output shaft of the motor (1) and fixedly connected to the inner ring of the second bearing (5), and a second cylindrical portion fixedly assembled on the end of the first cylindrical portion away from the motor (1) and arranged eccentrically from the first cylindrical portion, and the inner ring of the first bearing (3) is fixedly sleeved on the second cylindrical portion.

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