A method for directional installation between pump and reducer in duplex diaphragm pump

Abstract

The application discloses a directional installation method between a pump and a speed reducer in a double-separation diaphragm pump, and comprises the following steps: step one, double-separation diaphragm pump preliminary arrangement: the phase angle between three crank webs on a three-crank shaft A and three crank webs on a three-crank shaft B is 120 DEG; a crank web key groove A is formed on the front end shaft of the three-crank shaft A; and a crank web key groove B is formed on the front end shaft of the three-crank shaft B; step two, six crank web coordinate systems are established: three crank webs A and three crank webs B are staggered and spaced in an xoy coordinate system, and the included angle between any adjacent crank web A and crank web B is 60 DEG; step three, a crank shaft and an output shaft directional relationship formula is established: the directional relationship formula of the three-crank shaft A, the three-crank shaft B and the output shaft is established according to the xoy coordinate system; and step four, the crank shaft and the speed reducer are directionally installed. The phase angle of the six crank webs of the two crank shafts on the circumference is 60 DEG, so that the flow of the two diaphragm pump main machines is more uniform, and the pulsation rate is lower.

Description

Technical Field

[0001] This invention relates to the technical field of phase optimization arrangement of right-angle double diaphragm pumps, and specifically to a method for directional installation between the pump and the reducer in a double diaphragm pump. Background Technology

[0002] A dual diaphragm pump consists of two diaphragm pumps connected by a reducer. See [link to specific structure] for details. Figure 1 As shown, the dual diaphragm pump includes a first diaphragm pump 4 and a second diaphragm pump 5. A reducer 1 and a motor 6 are provided between the first diaphragm pump 4 and the second diaphragm pump 5. The reducer 1 adopts a right-angle double-output shaft type, including one input shaft and two output shafts. The two output shafts are arranged in a "T" shape with the input shaft. The two output shafts are the first output shaft 2 and the second output shaft 3, respectively. Keyways for installation are machined on the outer circles of the first output shaft 2 and the second output shaft 3. The first output shaft 2 is keyed to the crankshaft on the first diaphragm pump 4, and similarly, the second output shaft 3 is keyed to the crankshaft on the second diaphragm pump 5. During installation, it is necessary to ensure that the phase angle of the two diaphragm pumps is uniform when feeding, so as to ensure that the material is fully mixed during feeding.

[0003] However, during the installation of the dual diaphragm pumps, the crankshafts of the two diaphragm pumps and the output shaft of the reducer are installed in different ways, and there are no requirements to restrict the position of the three crank phase angles of the crankshafts of the two diaphragm pumps. This results in different phase angles of the six cranks connecting the two output shafts to the crankshaft, which in turn leads to insufficient mixing of materials during feeding. For example, in a dual high-pressure coal slurry feed pump, the feed pumps deliver coal slurry to the reactor in a symmetrical direction. In order to ensure that the coal slurry delivered by the left and right pumps can be fully mixed in the reactor, the motion parameters of the coal slurry must be kept consistent. At this time, the phase angles of the left and right pumps during feeding must be uniform. If they are not uniform, the coal slurry will not be fully mixed in the reactor.

[0004] Therefore, there is a need for a method to arrange the phase angles of the six cranks on the crankshaft of a double diaphragm pump so as to maintain a uniform arrangement of the phase angles of the six cranks. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, the present invention aims to provide a method for directional installation between the pump and the reducer in a dual diaphragm pump, which can restrict the position of the three crank phase angles of the crankshafts of the two diaphragm pumps, ensuring a more uniform material flow rate when the two diaphragm pumps are feeding, and enabling the materials to be fully mixed.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A method for directional installation between the pump and the reducer in a double diaphragm pump includes the following steps:

[0008] Step 1: Preliminary arrangement of the dual diaphragm pumps: This includes diaphragm pump A, diaphragm pump B, and a reducer. The reducer is located between diaphragm pump A and diaphragm pump B. Output shafts A and B extend from the reducer to the sides of diaphragm pump A and diaphragm pump B, respectively. Diaphragm pump A is equipped with a three-crankshaft A, and diaphragm pump B is equipped with a three-crankshaft B. The three-crankshaft A, three-crankshaft B, and two output shafts are arranged along the same center line. The three-crankshaft A has three cranks A, and the three-crankshaft B has three cranks B. The phase angle between the three cranks on the three-crankshaft A and the three cranks on the three-crankshaft B is 120°. A crankshaft keyway A is opened on the front end of the three-crankshaft A, and a crankshaft keyway B is opened on the front end of the three-crankshaft B.

[0009] Step 2: Establish six crank coordinate systems: Establish the xoy coordinate system with the output shaft center as the origin. The x-axis of the xoy coordinate system is set to extend horizontally along the radial direction of the output shaft, and the y-axis of the xoy coordinate system is set to extend vertically along the radial direction of the output shaft. Adjust the three-crankshaft A and three-crankshaft B to ensure that the three cranks A and three cranks B are staggered in the xoy coordinate system, and the included angle between any adjacent cranks A and B is 60°.

[0010] Step 3: Establish the orientation relationship between the crankshaft and the output shaft: Output shaft keyway A is set on output shaft A, and output shaft keyway B is set on output shaft B. In the xoy coordinate system, the angle between output shaft keyway A and its adjacent crank A on the three-crank crankshaft A on the same side is equal to the angle between output shaft keyway B and its adjacent crank B on the three-crank crankshaft B on the same side. Based on the xoy coordinate system, establish the orientation relationship between the three-crank crankshaft A, the three-crank crankshaft B, and the output shaft:

[0011]

[0012] In the formula, X represents the angle between the output shaft keyway A and the adjacent crank A on the three-crankshaft A on its side, and X takes any value from 0 to 60°; N represents the number of revolutions of the crankshaft; Y represents the angle between the output shaft keyway A and the output shaft keyway B.

[0013] Step 4: Oriented installation of crankshaft and reducer: Based on the orientation relationship between crankshaft and output shaft in Step 3, obtain the Y angle value. According to the Y angle value, machine output shaft keyway A and output shaft keyway B on output shaft A and output shaft B respectively. Connect output shaft A to three-crankshaft A and output shaft B to three-crankshaft B respectively through couplings.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] According to the above method, this invention obtains a Y-angle setpoint. Based on this Y-angle setpoint, output shaft keyways A and B are machined on output shaft A and output shaft B respectively. Output shaft A is connected to the three-crankshaft A, and output shaft B is connected to the three-crankshaft B, respectively, ensuring that the six cranks of the two crankshafts are distributed at a 60° phase angle on the circumference. This 60° phase angle distribution ensures more uniform flow and lower pulsation rate in the two diaphragm pump units, while also reducing the peak torque of the two diaphragm pumps and effectively lowering the installed power. The two diaphragm pumps can operate independently, unaffected by the other unit, avoiding mutual interference in the event of a malfunction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of a dual diaphragm pump in the prior art.

[0017] Figure 2 This is a coordinate schematic diagram of the directional installation method between the pump and the reducer in a double diaphragm pump according to the present invention.

[0018] Figure 3 This is an axial schematic diagram showing the positional relationship between the keyway A on the output shaft and the crankshaft A in the directional installation method between the pump and the reducer in a double diaphragm pump according to the present invention.

[0019] Figure 4 This is a graph showing the instantaneous flow rate of the double diaphragm pump in the directional installation method between the pump and the reducer in the double diaphragm pump of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] This embodiment: See Figure 2 and Figure 3 A method for directional installation between the pump and the reducer in a double diaphragm pump includes the following steps:

[0022] Step 1: Preliminary arrangement of the dual diaphragm pumps: This includes diaphragm pump A, diaphragm pump B, and a reducer. The reducer is located between diaphragm pump A and diaphragm pump B. Output shafts A and B extend from the reducer to the sides of diaphragm pump A and diaphragm pump B, respectively. Diaphragm pump A is equipped with a three-crankshaft A, and diaphragm pump B is equipped with a three-crankshaft B. The three-crankshaft A, three-crankshaft B, and two output shafts are arranged along the same center line. The three-crankshaft A has three cranks A, and the three-crankshaft B has three cranks B. The phase angle between the three cranks on the three-crankshaft A and the three cranks on the three-crankshaft B is 120°. A crankshaft keyway A is opened on the front end of the three-crankshaft A, and a crankshaft keyway B is opened on the front end of the three-crankshaft B.

[0023] Step 2: Establish six crank coordinate systems: Establish the xoy coordinate system with the output shaft center as the origin. The x-axis of the xoy coordinate system is set to extend horizontally along the radial direction of the output shaft, and the y-axis of the xoy coordinate system is set to extend vertically along the radial direction of the output shaft. Adjust the three-crankshaft A and three-crankshaft B to ensure that the three cranks A and three cranks B are staggered in the xoy coordinate system, and the included angle between any adjacent cranks A and B is 60°.

[0024] Step 3: Establish the orientation relationship between the crankshaft and the output shaft: Output shaft keyway A is set on output shaft A, and output shaft keyway B is set on output shaft B. In the xoy coordinate system, the angle between output shaft keyway A and its adjacent crank A on the three-crank crankshaft A on the same side is equal to the angle between output shaft keyway B and its adjacent crank B on the three-crank crankshaft B on the same side. Based on the xoy coordinate system, establish the orientation relationship between the three-crank crankshaft A, the three-crank crankshaft B, and the output shaft:

[0025]

[0026] In the formula, X represents the angle between the keyway A of the output shaft and the adjacent crank A on the three-crankshaft A on the same side, and X can take any value from 0 to 60°; N represents the number of revolutions of the crankshaft, and N can take the value 0 or 1, but is not limited; Y represents the angle between the keyway A of the output shaft and the keyway B of the output shaft.

[0027] Step 4: Oriented installation of crankshaft and reducer: Based on the orientation relationship between crankshaft and output shaft in Step 3, obtain the Y angle value. According to the Y angle value, machine output shaft keyway A and output shaft keyway B on output shaft A and output shaft B respectively. Connect output shaft A to three-crankshaft A and output shaft B to three-crankshaft B respectively through couplings.

[0028] By optimizing the crankshaft crank phase arrangement method described above, it is possible to ensure that the six cranks of the two crankshafts are distributed at a phase angle of 60° on the circumference. By analyzing the reciprocating motion law of the piston rod of the dual diaphragm pump, the correspondence between each motion parameter and the crankshaft crank phase angle can be found. At the same time, since the dual diaphragm pump uses two diaphragm pumps directly connected through a reducer, the motion mode of the two cranks of the two diaphragm pumps is similar to that of a six-cylinder pump. According to the principle that the instantaneous flow rate of a multi-cylinder pump is equal to the sum of the instantaneous flow rates of each cylinder at the same instant, the more cylinders there are, the smaller the instantaneous flow pulsation of the pump. Therefore, it can be determined that the arrangement method of the present invention can also achieve the technical effect of small instantaneous flow pulsation of the dual diaphragm pump.

[0029] See also the appendix. Figure 4 , attached Figure 4The instantaneous flow rate curve is the same as that of a six-cylinder pump in the prior art, and is also equivalent to the instantaneous flow rate curve of the double diaphragm pump of this invention. When obtaining the flow rate curve graphically, the flow rate curve of each cylinder is drawn on graph paper according to the phase difference between each cylinder. The curve is then obtained by superimposing the coordinate values ​​on the graph. The top of the curve represents a peak, and the bottom represents a trough. (The last sentence appears to be incomplete and possibly refers to a different method.) Figure 4 It can be seen that the peak + trough of one sine wave equals the peak + trough of another sine wave. Therefore, the values ​​of adjacent peaks and troughs are equal, indicating a more uniform flow rate and lower pulsation rate. Simultaneously, it reduces the peak torque of the two diaphragm pumps, effectively lowering the installed power. The two diaphragm pumps operate independently, unaffected by the other main unit, avoiding mutual interference in the event of a malfunction.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A method for directional installation between the pump and the reducer in a double diaphragm pump, characterized in that, Includes the following steps: Step 1: Preliminary arrangement of the dual diaphragm pumps: This includes diaphragm pump A, diaphragm pump B, and a reducer. The reducer is located between diaphragm pump A and diaphragm pump B. Output shafts A and B extend from the reducer to the sides of diaphragm pump A and diaphragm pump B, respectively. Diaphragm pump A is equipped with a three-crankshaft A, and diaphragm pump B is equipped with a three-crankshaft B. The three-crankshaft A, three-crankshaft B, and two output shafts are arranged along the same center line. The three-crankshaft A has three cranks A, and the three-crankshaft B has three cranks B. The phase angle between the three cranks on the three-crankshaft A and the three cranks on the three-crankshaft B is 120°. A crankshaft keyway A is opened on the front end of the three-crankshaft A, and a crankshaft keyway B is opened on the front end of the three-crankshaft B. Step 2: Establish six crank coordinate systems: Establish the xoy coordinate system with the output shaft center as the origin. The x-axis of the xoy coordinate system is set to extend horizontally along the radial direction of the output shaft, and the y-axis of the xoy coordinate system is set to extend vertically along the radial direction of the output shaft. Adjust the three-crankshaft A and three-crankshaft B to ensure that the three cranks A and three cranks B are staggered in the xoy coordinate system, and the included angle between any adjacent cranks A and B is 60°. Step 3: Establish the orientation relationship between the crankshaft and the output shaft: Output shaft keyway A is set on output shaft A, and output shaft keyway B is set on output shaft B. In the xoy coordinate system, the angle between output shaft keyway A and its adjacent crank A on the three-crank crankshaft A on the same side is equal to the angle between output shaft keyway B and its adjacent crank B on the three-crank crankshaft B on the same side. Based on the xoy coordinate system, establish the orientation relationship between the three-crank crankshaft A, the three-crank crankshaft B, and the output shaft: In the formula, X represents the angle between the output shaft keyway A and the adjacent crank A on the three-crankshaft A on its side, and X takes any value from 0 to 60°; N represents the number of revolutions of the crankshaft; Y represents the angle between the output shaft keyway A and the output shaft keyway B. Step 4: Oriented installation of crankshaft and reducer: Based on the orientation relationship between crankshaft and output shaft in Step 3, obtain the Y angle value. According to the Y angle value, machine output shaft keyway A and output shaft keyway B on output shaft A and output shaft B respectively. Connect output shaft A to three-crankshaft A and output shaft B to three-crankshaft B respectively through couplings.

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