CN210318469U - Slurry pump power end gear shifting mechanism - Google Patents

Abstract

The mud pump power end gear shifting mechanism comprises a shell, an input shaft B and an output shaft B; the input shaft B and the output shaft B are movably arranged on the shell at two ends; the transmission device also comprises a slow gear input gear, a first bearing, a fast gear input gear, a second bearing, a duplicate gear B, a shifting fork B, a slow gear output gear, a fast gear output gear and an output gear B. The utility model has the advantages that the duplicate gear B is engaged with the internal teeth of the slow-gear input gear or the internal teeth of the fast-gear input gear to realize gear switching, and the duplicate gear B can not interfere with the output gear B in the sliding process on the input shaft B; the fast gear input gear and the fast gear output gear are a pair of normally meshed gears, the slow gear input gear and the slow gear output gear are a pair of normally meshed gears, the size of the fast gear input gear can be designed to be larger within an allowable range according to actual requirements, or the size of the slow gear input gear can be designed to be smaller within the allowable range, and therefore the speed ratio difference between the fast gear and the slow gear is enlarged.

Description

Slurry pump power end gear shifting mechanism

Technical Field

The utility model relates to a geology and ocean probing equip the field, especially a mud pump power end gearshift.

Background

In geological and ocean drilling industries, a mud pump is usually matched with a surface core drilling machine and an ocean drilling machine, in order to meet the requirements of complex construction processes, the flow change range of the mud pump is large, and a multi-gear speed change mechanism is usually designed at the power end of the mud pump to adjust the flow.

The power end gear shifting mechanism of the existing mud pump is shown in fig. 3-4 and comprises a shell (not shown in the figure), an input shaft A1, an output shaft A2, a fast gear 3, a slow gear 4, an output gear A5, a duplicate gear A6 and a shifting fork A7. The input shaft A1 is provided with an external spline, and the two ends of the input shaft A1 are movably arranged on the shell. The output shaft a2 is movably mounted to the housing at both ends. The fast gear 3, the slow gear 4 and the output gear a5 are respectively fixedly mounted on the output shaft a2, and the output gear a5 is located between the slow gear 4 and the fast gear 3. The duplicate gear A6 comprises a large gear part 61 and a small gear part 62 fixedly connected to one side of the large gear part 61, an inner hole of the large gear part 61 is communicated with an inner hole of the small gear part 62 to form an inner hole of a duplicate gear A6, an inner spline matched with an outer spline on the input shaft A1 is arranged in the inner hole of the duplicate gear A6, and the duplicate gear A6 is movably sleeved on the input shaft A1 and is matched with the outer spline on the input shaft A1 through the inner spline. The shift fork a7 is associated with the dual gear a6, and the shift fork a7 is shifted to drive the dual gear a6 to move on the input shaft a6, so that the large gear portion 61 is meshed with the fast gear 3, or the small gear portion 62 is meshed with the slow gear 4.

The working principle of the slurry pump power end gear shifting mechanism is as follows: when the sliding fork A7 enables the large gear part 61 of the duplicate gear A6 to be connected with the fast gear 3, namely, the fast gear is switched, the transmission route of the fast gear is that power sequentially passes through the input shaft A1, the large gear part 61 of the duplicate gear A6 and the fast gear 3, is transmitted to the output shaft A2, and is output through the output gear A5. When the slide fork a7 engages the pinion gear 62 of the dual gear a6 with the slow gear 4, that is, when the gear is shifted to the slow gear, the transmission path of the slow gear is such that power passes through the input shaft a1, the pinion gear 62 of the dual gear a6, and the slow gear 4 in this order, is transmitted to the output shaft a2, and is output through the output gear a 5.

The slurry pump power end gear shifting mechanism has the following defects: 1. because the duplicate gear A shifts gears through slippage, all the paired gears can be realized only by straight gears, and the meshing transmission of the straight gears has higher noise. 2. In the process of sliding gear shifting, the duplicate gear A is required not to interfere with the output gear A (in a common way, the duplicate gear A is required not to be collided with the output gear A), so that the diameter of a large gear part of the duplicate gear A is limited not to be too large, and further the speed ratio difference between a fast gear and a slow gear is small.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, and provide a slush pump power end gearshift, it has solved the big and little problem of velocity ratio difference of current slush pump power end gearshift operating noise.

The technical scheme of the utility model is that: the mud pump power end gear shifting mechanism comprises a shell, an input shaft B and an output shaft B; the input shaft B and the output shaft B are movably arranged on the shell at two ends;

the double-gear transmission device also comprises a slow gear input gear, a first bearing, a fast gear input gear, a second bearing, a duplicate gear B, a shifting fork B, a slow gear output gear, a fast gear output gear and an output gear B;

an unthreaded hole section A for mounting a first bearing and an internal tooth hole section A with internal teeth are arranged in an inner hole of the slow-gear input gear, and the slow-gear input gear is movably sleeved on an input shaft B through the first bearing mounted in the unthreaded hole section A and is positioned in the axial direction; an unthreaded hole section B for mounting a second bearing and an internal tooth hole section B with internal teeth are arranged in an inner hole of the fast-gear input gear, and the fast-gear input gear is movably sleeved on the input shaft B through the second bearing mounted in the unthreaded hole section B and is positioned in the axial direction; the dual gear B is movably sleeved on the input shaft B, is positioned between the slow gear input gear and the fast gear input gear, and comprises a first gear part and a second gear part arranged on one side of the first gear part; the shifting fork B is associated with the duplicate gear B, and is shifted to drive the duplicate gear B to move on the input shaft B, so that a first gear part of the duplicate gear B is meshed with the internal teeth in the internal tooth hole section A of the slow-gear input gear, or a second gear part of the duplicate gear B is meshed with the internal teeth in the internal tooth hole section B of the fast-gear input gear; the slow gear output gear, the fast gear output gear and the output gear B are respectively and fixedly arranged on the output shaft B, the slow gear output gear is meshed with the slow gear input gear, and the fast gear output gear is meshed with the fast gear input gear.

The utility model discloses further technical scheme is: the slow gear input gear, the fast gear input gear, the slow gear output gear and the fast gear output gear are all helical gears.

Compared with the prior art, the utility model have following advantage:

1. the duplicate gear B is meshed with the internal teeth of the slow-gear input gear or the internal teeth of the fast-gear input gear to realize gear switching, and cannot interfere with the output gear B in the sliding process on the input shaft B; the fast gear input gear and the fast gear output gear are a pair of normally meshed gears, the slow gear input gear and the slow gear output gear are a pair of normally meshed gears, the size of the fast gear input gear can be designed to be larger within an allowable range according to actual requirements, or the size of the slow gear input gear can be designed to be smaller within the allowable range, and therefore the speed ratio difference between the fast gear and the slow gear is enlarged.

2. The slow gear input gear, the slow gear output gear, the fast gear input gear and the fast gear output gear are all helical gears, meshing is stable, and noise is low.

The invention is further described below with reference to the figures and examples.

Drawings

Fig. 1 is a schematic structural view of the present invention when switching to the fast shift;

FIG. 2 is a schematic structural view of the present invention when switching to a slow gear;

FIG. 3 is a schematic structural diagram of a conventional mud pump power end shifting mechanism when the shifting mechanism is switched to a fast gear;

fig. 4 is a schematic structural diagram of a conventional mud pump power end shifting mechanism when the shifting mechanism is switched to a slow gear.

Detailed Description

Example 1:

as shown in fig. 1-4, the mud pump power-end shifting mechanism includes a housing (not shown), an input shaft B8, an output shaft B9, a slow-gear input gear 10, a first bearing 11, a fast-gear input gear 12, a second bearing 13, a duplicate gear B14, a shift fork B15, a slow-gear output gear 16, a fast-gear output gear 17 and an output gear B18.

The input shaft B8 and the output shaft B9 are both movably mounted on the housing at both ends.

The inner hole of the slow gear input gear 10 is provided with a smooth hole section A for mounting the first bearing 11 and an inner tooth hole section A provided with inner teeth, and the slow gear input gear 10 is movably sleeved on the input shaft B8 through the first bearing 11 mounted in the smooth hole section A and is positioned in the axial direction.

The inner hole of the fast-gear input gear 12 is provided with a unthreaded hole section B for mounting the second bearing 12 and an inner tooth hole section B with inner teeth, and the fast-gear input gear 12 is movably sleeved on the input shaft B8 through a second bearing 13 mounted in the unthreaded hole section B and is positioned in the axial direction.

The dual gear B14 is movably sleeved on the input shaft B8 and located between the slow gear input gear 10 and the fast gear input gear 12, and includes a first gear portion 141 and a second gear portion 142 disposed on one side of the first gear portion 141.

The shift fork B15 is associated with the dual gear B14, and the shift fork B15 is shifted to move the dual gear B14 on the input shaft B8, so that the first gear portion 141 of the dual gear B14 is engaged with the internal teeth in the internal tooth hole section a of the slow gear input gear 10, or the second gear portion 142 of the dual gear B14 is engaged with the internal teeth in the internal tooth hole section B of the fast gear input gear 12.

The slow gear output gear 16, the fast gear output gear 17 and the output gear B18 are respectively and fixedly arranged on the output shaft B9, the slow gear output gear 16 is meshed with the slow gear input gear 10, and the fast gear output gear 17 is meshed with the fast gear input gear 12.

Preferably, the slow input gear 10, the fast input gear 12, the slow output gear 16 and the fast output gear 17 are all helical gears.

Brief description the utility model discloses a theory of operation: when the slide fork B15 engages the first gear portion 141 of the dual gear B14 with the internal teeth of the internal tooth hole section a of the slow gear input gear 10, that is, when the transmission path is switched to the slow gear, the transmission path of the slow gear is that power passes through the input shaft B8, the first gear portion 141 of the dual gear B14, the slow gear input gear 10 and the slow gear output gear 16 in sequence, is transmitted to the output shaft B9, and is finally output through the output gear B18.

When the sliding fork B15 causes the second gear part 142 of the duplicate gear B14 to be meshed with the internal teeth in the internal tooth hole section B of the fast gear input gear 12, the fast gear is switched to, and the transmission route of the fast gear is that power sequentially passes through the input shaft B8, the second gear part 142 of the duplicate gear B14, the fast gear input gear 12 and the fast gear output gear 17, is transmitted to the output shaft B9, and is finally output through the output gear B18.

Claims (2)

1. Slurry pump power end gearshift, characterized by: comprises a shell, an input shaft B and an output shaft B; the input shaft B and the output shaft B are movably arranged on the shell at two ends;

the double-gear transmission device also comprises a slow gear input gear, a first bearing, a fast gear input gear, a second bearing, a duplicate gear B, a shifting fork B, a slow gear output gear, a fast gear output gear and an output gear B;

an unthreaded hole section A for mounting a first bearing and an internal tooth hole section A with internal teeth are arranged in an inner hole of the slow-gear input gear, and the slow-gear input gear is movably sleeved on an input shaft B through the first bearing mounted in the unthreaded hole section A and is positioned in the axial direction; an unthreaded hole section B for mounting a second bearing and an internal tooth hole section B with internal teeth are arranged in an inner hole of the fast-gear input gear, and the fast-gear input gear is movably sleeved on the input shaft B through the second bearing mounted in the unthreaded hole section B and is positioned in the axial direction; the dual gear B is movably sleeved on the input shaft B, is positioned between the slow gear input gear and the fast gear input gear, and comprises a first gear part and a second gear part arranged on one side of the first gear part; the shifting fork B is associated with the duplicate gear B, and is shifted to drive the duplicate gear B to move on the input shaft B, so that a first gear part of the duplicate gear B is meshed with the internal teeth in the internal tooth hole section A of the slow-gear input gear, or a second gear part of the duplicate gear B is meshed with the internal teeth in the internal tooth hole section B of the fast-gear input gear; the slow gear output gear, the fast gear output gear and the output gear B are respectively and fixedly arranged on the output shaft B, the slow gear output gear is meshed with the slow gear input gear, and the fast gear output gear is meshed with the fast gear input gear.

2. The mud pump power end shift mechanism of claim 1, further comprising: the slow gear input gear, the fast gear input gear, the slow gear output gear and the fast gear output gear are all helical gears.

Images