High-pressure plunger pump with magnetic coupler

Abstract

The high-pressure plunger pump with the magnetic coupler comprises a motor assembly and a metering pump assembly, the metering pump assembly is fixedly installed at the output end of the motor assembly, the metering pump assembly comprises a pump main shaft and an isolation cover, a supporting bearing is arranged at the joint of the isolation cover and the pump main shaft, the outer ring of the supporting bearing is fixedly connected with the isolation cover, and the isolation cover is fixedly connected with the motor assembly. An inner ring of the supporting bearing is fixedly connected with a pump spindle, a spindle rotating speed gear ring is arranged on the side face of the right end of the pump spindle, and a spindle rotating speed sensor is arranged at the axial perpendicular position of the spindle rotating speed gear ring. The rotation number of the pump main shaft is read in real time, when the rotation speed ratios of the pump main shaft and the output shaft of the motor assembly are different, faults can be directly judged, the centrifugal force of the pump main shaft can be controlled through the supporting bearing, on one hand, the force of the main bearing is shared, on the other hand, the fixing effect is achieved, and the outer wall is prevented from being damaged or punctured; and the service life problem caused by abnormal use damage is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a high-pressure plunger pump with a magnetic coupling. Background Technique

[0002] In a conventional magnetic coupling high-pressure plunger pump, during use, the magnetic force on the bearing is relatively large, resulting in up-and-down shaking, easy wear, and a large gap between the shaft and the bearing. The magnetic force causes the bearing to tilt, making it more prone to damage.

[0003] At the same time, during use, problems such as the failure of the inner magnet and the outer magnet often occur. The operation of the motor and the pump is not synchronized, but it is impossible to effectively determine where the fault occurs because the inner magnet and the outer magnet are not rigidly connected. The motor is rotating while the pump is not rotating. The detection speed generally only detects the motor and defaults that the rotation speed of the motor is the rotation speed of the pump. However, after the pump actually loses magnetism, the following results will occur: for example, when the motor rotates at 1000 revolutions per minute, in fact, the rotation speed of the pump is only 950 revolutions per minute. The rotation speeds are not synchronized, resulting in magnetic force cutting and generating heat. The generated heat will further cause the magnetic force to fail and the rotation speed to be lower. In actual use, it is also impossible to determine whether the problem is with the magnetic force or the motor.

[0004] Therefore, we propose a high-pressure plunger pump with a magnetic coupling to solve the problems raised above. Content of the Utility Model

[0005] The purpose of the utility model is to provide a high-pressure plunger pump with a magnetic coupling to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A high-pressure plunger pump with a magnetic coupling, comprising: a motor assembly and a metering pump assembly. The output end of the motor assembly is fixedly installed with the metering pump assembly. The metering pump assembly includes a pump main shaft and an isolation cover.

[0007] A support bearing is provided at the connection between the isolation cover and the pump main shaft. The outer ring of the support bearing is fixedly connected to the isolation cover, and the inner ring of the support bearing is fixedly connected to the pump main shaft.

[0008] A main shaft speed gear ring is provided on the right side surface of the pump main shaft. A main shaft speed sensor is provided perpendicular to the axial direction of the main shaft speed gear ring, and is inductively connected through the main shaft speed sensor and the main shaft speed gear ring.

[0009] Preferably, a motor bracket is fixedly installed at the lower end of the joint between the motor assembly and the metering pump assembly.

[0010] Preferably, the left part of the pump main shaft is fixedly connected to the inner magnet through a main shaft flat key. The inner magnet is sleeved with an isolation cover, and the isolation cover is sleeved with an outer magnet.

[0011] Preferably, the output shaft of the motor assembly is coaxially and fixedly connected to the outer magnet.

[0012] Preferably, an outer bell cover is movably sleeved outside the outer magnet, and a mounting flange is fixedly provided at the right end of the outer bell cover.

[0013] Preferably, the mounting flange is rotationally connected to the pump main shaft through an inner support and a main bearing. A metering pump is fixedly installed at the right part of the inner support, and a main shaft speed sensor is fixedly provided at the joint of the inner support and the metering pump.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. During the rotation of the pump main shaft, the main shaft speed sensor senses the main shaft speed gear ring on the pump main shaft to realize real-time reading of the rotation speed of the pump main shaft. When the speed ratio of the pump main shaft and the output shaft of the motor assembly is different, a fault can be directly judged.

[0016] 2. Through the support bearing, the centrifugal force of the pump main shaft can be controlled. On the one hand, it shares the force of the main bearing, and on the other hand, it plays a fixing role to avoid damage or piercing of the outer wall, solving the service life problem caused by abnormal use and damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a side sectional view of the present utility model;

[0019] Figure 3 is a sectional view of the outer bell cover and the metering pump assembly in the present utility model.

[0020] In the figure: 1. Pump main shaft; 2. Inner magnet; 3. Support bearing; 4. Isolation cover; 5. Metering pump assembly; 6. Motor assembly; 7. Outer magnet; 8. Mounting flange; 9. Main shaft speed sensor; 10. Main shaft speed gear ring; 11. Motor bracket 11; 12. Main shaft flat key; 13. Outer bell cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1-3, the present utility model provides a technical solution: a high-pressure plunger pump with a magnetic coupling, comprising: a motor assembly 6 and a metering pump assembly 5, the output end of the motor assembly 6 is fixedly installed with the metering pump assembly 5;

[0023] At the lower end of the joint of the motor assembly 6 and the metering pump assembly 5, a motor bracket 11 is fixedly installed to support the entire pump body;

[0024] The metering pump assembly 5 includes a pump main shaft 1, the left part of the pump main shaft 1 is fixedly connected to the inner magnet 2 through a main shaft flat key 12, the inner magnet 2 is sleeved with an isolation cover 4, and the isolation cover 4 is sleeved with an outer magnet 7;

[0025] The output shaft of the motor assembly 6 is coaxially fixedly connected to the outer magnet 7;

[0026] A support bearing 3 is provided at the connection between the isolation cover 4 and the pump main shaft 1, the outer ring of the support bearing 3 is fixedly connected to the isolation cover 4, and the inner ring of the support bearing 3 is fixedly connected to the pump main shaft 1;

[0027] Through the support bearing 3, the centrifugal force of the pump main shaft 1 can be controlled. On the one hand, it shares the force of the main bearing, and on the other hand, it plays a fixing role to avoid damage or piercing of the outer wall, solving the service life problem caused by abnormal use and damage;

[0028] An outer bell cover 13 is movably sleeved outside the outer magnet 7, an installation flange 8 is fixedly provided at the right end of the outer bell cover 13, the installation flange 8 is rotationally connected to the pump main shaft 1 through an inner support and a main bearing, and a metering pump is fixedly installed at the right part of the inner support;

[0029] A main shaft speed gear ring 10 is provided on the right side surface of the right end of the pump main shaft 1, a main shaft speed sensor 9 is fixedly provided at the joint of the inner support and the metering pump. Through the sensing of the main shaft speed sensor 9 and the main shaft speed gear ring 10, the rotation speed of the pump main shaft 1 can be read in real time, and the fault point can be directly judged;

[0030] The main shaft speed sensor 9 is a customized standard part, which is convenient for the large-scale production of pump products. The main shaft speed sensor 9 collects Hall signals and reads pulses from the program to judge the main shaft speed.

[0031] Working principle: The motor assembly 6 drives the pump main shaft 1 to rotate through the outer magnet 7 and the inner magnet 2. During the rotation of the pump main shaft 1, the main shaft speed gear ring 10 on the pump main shaft 1 is sensed by the main shaft speed sensor 9 to realize the real-time reading of the rotation speed of the pump main shaft 1. When the speed ratio between the pump main shaft 1 and the output shaft of the motor assembly 6 is different, a fault can be directly judged.

[0032] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0033] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-pressure plunger pump with a magnetic coupling, comprising: A motor assembly (6) and a metering pump assembly (5), wherein the metering pump assembly (5) is fixedly mounted on the output end of the motor assembly (6), and the metering pump assembly (5) comprises a pump main shaft (1) and an isolation cover (4); The invention is characterized in that: a support bearing (3) is provided at the connection between the isolation cover (4) and the pump main shaft (1), the outer ring of the support bearing (3) is fixedly connected to the isolation cover (4), and the inner ring of the support bearing (3) is fixedly connected to the pump main shaft (1); A spindle speed gear ring (10) is provided on the right end side of the pump spindle (1), and a spindle speed sensor (9) is provided at an axial position perpendicular to the spindle speed gear ring (10), and the spindle speed sensor (9) and the spindle speed gear ring (10) are connected by induction.

2. A high-pressure plunger pump with a magnetic coupling according to claim 1, characterized in that: A motor bracket (11) is fixedly mounted at the lower end of the junction of the motor assembly (6) and the metering pump assembly (5).

3. A high-pressure plunger pump with a magnetic coupling according to claim 1, characterized in that: The left part of the pump main shaft (1) is fixedly connected to the inner magnet (2) via a main shaft flat key (12); an isolation cover (4) is arranged outside the inner magnet (2); and an outer magnet (7) is arranged outside the isolation cover (4).

4. A high-pressure plunger pump with a magnetic coupling according to claim 1, characterized in that: The output shaft of the motor assembly (6) is coaxially fixedly connected to the external magnet (7).

5. A high-pressure plunger pump with a magnetic coupling according to claim 4, characterized in that: An outer bell housing (13) is movably sleeved on the outer side of the outer magnet (7), and a mounting flange (8) is fixedly provided on the right end of the outer bell housing (13).

6. A high-pressure plunger pump with a magnetic coupling according to claim 5, characterized in that: The mounting flange (8) is rotatably connected to the pump main shaft (1) through the inner bracket and the main bearing. The metering pump is fixedly mounted on the right part of the inner bracket. A main shaft speed sensor (9) is fixedly arranged at the junction of the inner bracket and the metering pump.

Images