A service pin configuration for progressive cavity pumps

Abstract

The invention relates to a service pin (100) that ensures that the motor-reducer (10) connection used in progressive cavity pumps (1), which can pump all liquids, liquid-solid or liquid-gas mixtures in different industries such as petroleum, food, wastewater treatment, even if they have different density, concentration and viscosity values, is held together without sliding off other components when the motor-reducer (10) connection is desired to be removed, and at the same time, when the stator group (40) is to be installed or removed, the rotor (30) is fixed without rotation.

Description

[0001] A SERVICE PIN CONFIGURATION FOR PROGRESSIVE CAVITY PUMPS

[0002] Technical Field

[0003] The invention relates to progressive cavity pumps and a service pin that provides ease of maintenance and assembly of the reducer and stator group used in these pumps.

[0004] The invention, in particular; relates to a service pin that ensures the elements in the internal parts, which will slide off due to the mechanical seal that provides sealing in case of disassembly of the motor-reducer connection used in progressive cavity pumps, which can pump all liquids, liquid-solid or liquid-gas mixtures in different industries such as petroleum, food, waste water treatment, even if they have different density, concentration and viscosity values, are kept together without sliding off and at the same time, when the stator group is to be disassembled and assembled, the rotor can be fixed without rotating.

[0005] Prior Art

[0006] Today, pumps are used in various fields of industry to transfer difficult fluids from one place to another. For example, in the food industry, progressive cavity pumps are preferred for the transfer of fluids such as chocolate and cream with low vibration without causing any change in the product structure.

[0007] In the progressive cavity pumps of the current art, an electric motor is used as the drive element and a reducer is used to reduce the speed to the desired level and increase the torque. The drive shaft is connected to the reducer shaft with a pin and the rotational movement is transferred from the drive shaft to the cardan shaft and then to the rotor. Sealing is required between the drive shaft and the lantern body and a mechanical seal is usually used for this purpose. This mechanical seal has a spring and is in tension when the pump is assembled.

[0008] In the prior art, if the motor and reducer duo is removed from the pump, the drive shaft moves backwards with the effect of the mechanical seal spring which is in tension. If the reducer is to be reinstalled in the pump, serious installation difficulties arise since the drive shaft will not be in its original position. In order to solve this problem, the whole pump must be disassembled and reassembled. If the stator group of the pump is to be replaced, this is done by rotating the stator around the rotor since the internal structure of the stator is helical and compatible with the rotor. Since the rotor element rotates with the stator, assembly and disassembly of the stator element is difficult. These situations cause loss of time and labor.

[0009] Nowadays, maintenance and service operations of the mentioned pumps need to be carried out quite frequently. During the disassembly of the parts of the pump, the complete disassembly and reassembly of all parts or the assembly and disassembly of the stator group is a very laborious and time-consuming task. For this reason, there is a need for a development that will eliminate this disadvantage, facilitate maintenance and service work and eliminate time loss.

[0010] As a result of the research on the subject in the literature, a document with publication number EP2944819B1 was found. The document relates to a progressive cavity pump comprising a rotor extending from a drive end to a free end along its longitudinal axis, a stator housing extending from a stator inlet opening to a stator outlet opening and having an internal volume formed to receive the rotor, a drive assembly (motor and reducer) with a drive shaft coupled to the rotor for the transmission of torque, a universal joint for the transmission of torque between the drive shaft and the rotor, a pump housing assembly for the inlet of the material and an outlet flange positioned behind the rotor in the direction of flow. The current state of the art does not include any enhancements that would allow the motor and reducer duo to be separated while the other parts are kept together, facilitating maintenance and servicing.

[0011] Another document encountered on the subject is the document with the publication number US10648337B2. The document relates to a progressive cavity pump having at least one stator made of elastic material and a rotor rotatable or rotatably mounted inside the stator, where the stator can be reliably reconnected, preferably even under higher loads. The current state of the art does not include any improvements that would allow the motor and reducer duo to be separated while the other parts are kept together, facilitating maintenance and servicing.

[0012] Consequently, due to the above-mentioned drawbacks and the fact that existing solutions have room for improvement, it was deemed necessary to develop an improvement in the relevant technical field. Purpose of the Invention

[0013] The invention is inspired by existing situations and aims to solve the above-mentioned problems.

[0014] The main purpose of the invention relates to a service pin that ensures the internal parts, in case of disassembly of the motor-reducer connection used in progressive cavity pumps that can pump all liquids, liquid-solid or liquid-gas mixtures in different industries such as petroleum, food, waste water treatment, even if they have different density, concentration and viscosity values, are kept together without sliding off and at the same time, when the stator group is to be disassembled and assembled, the rotor can be fixed without rotating.

[0015] The other purpose of the invention is to enable the reducer to be mounted to the pump without dismantling other pump components in case of maintenance and service. In this way, labor costs and time losses are prevented.

[0016] In order to fulfill the aforementioned purposes, the invention is a progressive cavity pump which is able to pump all liquids, liquid-solid or liquid-gas mixtures even if they have different density, concentration and viscosity values in different industries such as petroleum, food, wastewater treatment, comprising:

[0017] • A motor-reducer that provides the power needed by the machine,

[0018] • A pump casing assembly, the part where the fluid enters the pump,

[0019] • A lantern housing that connects the motor-reducer and the pump casing assembly,

[0020] • A drive shaft that transmits the rotational motion it receives from the reducer,

[0021] • A cardan shaft that transmits the rotational motion received from the drive shaft,

[0022] • A rotor that rotates eccentrically with the drive from the cardan shaft and provides flow and pressure,

[0023] • Connecting pins that connect both the drive shaft to cardan shaft and the cardan shaft to the rotor, • A stator whose internal geometry allows the rotor to rotate eccentrically,

[0024] • The service body located between the stator and the pump casing, which allows the rotor to be removed after the removal of the stator,

[0025] • An outlet flange, the part where the fluid exits the pump and characterized by comprising;

[0026] • a service pin that prevents sliding off of all other components of the progressive cavity pump by being inserted into both the lantern body and the drive shaft when the motor-reducer is disassembled, eliminates the need to disassemble these components for maintenance and service, and at the same time ensures that the rotor element is fixed without rotation when the stator group is to be installed or removed.

[0027] The structural and characteristic features and all advantages of the invention will be more clearly understood by means of the figures given below and the detailed description written by making references to these figures, and therefore, the evaluation should be made by considering these figures and detailed description.

[0028] Figures to Help Understanding of the Invention

[0029] Figure 1, is the top perspective view of the progressive cavity pump.

[0030] Figure 2, is the side view of the progressive cavity pump.

[0031] Figure 3, is the sectional view of the progressive cavity pump with service pin mounted.

[0032] Figure 4, is the general view of the service pin in the subject to the invention.

[0033] Figure 5, is the pre-assembly view of the service pin of the subject to the invention

[0034] Figure 6, is the section view of all elements of the progressive cavity pump with service pin assembly.

[0035] Description of Part References

[0036] 1. Progressive cavity pump 10. Motor-reducer

[0037] 11. Reducer pin

[0038] 12. Drive shaft

[0039] 13. Cardan shaft

[0040] 20. Lantern body

[0041] 21. Protective cover

[0042] 30. Rotor

[0043] 31. Rotor connection pin

[0044] 40. Stator group

[0045] 41. Stator

[0046] 50. Pump casing group

[0047] 51. Pump casing

[0048] 52. Service body

[0049] 60. Outlet flange

[0050] 100. Service pin

[0051] Detailed Description of the Invention

[0052] In this detailed description, the preferred embodiments of the progressive cavity pump (1 ), which is the subject to the invention, are described only for a better understanding of the subject.

[0053] As the subject to the invention, the progressive cavity pump (1 ) can pump almost all liquids, liquid-solid, liquid-gas mixtures even with different densities, concentrations and viscosity values, it can be used in industries such as petroleum, food, waste water treatment. The progressive cavity pump (1 ), which has a widespread usage network, basically; consists of a motor-reducer (10), drive shaft (12), cardan shaft (13), lantern body (20), rotor (30), stator (41 ), pump casing (51 ), service body (52) and outlet flange. (60).

[0054] The motor-reducer (10) in the progressive cavity pump (1 ) of the invention provides the power required by the machine. The fluid enters the pump through the pump casing (51 ). The lantern body (20) connects the motor-reducer (10) and the pump casing (51 ). The reducer bolts connect the reducer to the lantern body (20). There is a drive shaft (12) to transfer the rotational motion received from the reducer. The cardan shaft (13) ensures that the rotational motion received from the drive shaft (12) is transmitted to the rotor (30). The rotor (30) rotates eccentrically inside the stator (41) to create flow and pressure. The internal geometry of the stator (41 ) is suitable for the rotation of the rotor (30).

[0055] The reducer pin (11 ) in the pump subject to the invention is the element that transfers the rotational motion received from the reducer to the drive shaft (12). The rotor connection pin (31 ) connects the drive shaft (12) with the cardan shaft (13) and the cardan shaft (13) with the rotor (30). In addition, the progressive cavity pump (1 ) which is subject to the invention, has a service body (52) located between the stator group (40) and the pump casing (51 ), which enables the rotor (30) to be removed after the stator group (40) is removed, and the rotor connection pin (31 ) is removed, and thus the rotor (30) is removed.

[0056] The most important purpose of the progressive cavity pump (1 ) of the invention is to ensure that the other components are kept together without sliding off when the motorreducer (10) connection is to be removed. In order to realize this purpose, a service pin (100) has been developed, which is threaded into both the lantern body (20) and the drive shaft (12), preventing all other components of the progressive cavity pump (1 ) from sliding off and eliminating the need to disassemble all components for maintenance and service. As can be seen in Figures 5 and 6, the service pin (100) is inserted into the progressive cavity pump (1 ) through concentrically positioned holes in the lantern body (20) and the drive shaft (12). In this way, the drive shaft (12) and other components are prevented from moving backwards from their current position.

[0057] During maintenance times, if the motor-reducer (10) duo is to be removed from the pump and the remaining components of the pump are not to be disassembled, this process can be carried out very quickly and easily thanks to the service pin (100). In addition, when the stator group (40) is to be installed or removed, it ensures that the rotor (30) element is fixed without rotating.

Claims

CLAIMS1. A progressive cavity pump (1 ) which is able to pump all liquids, liquid-solid or liquid-gas mixtures even if they have different density, concentration and viscosity values in different industries such as petroleum, food, wastewater treatment, comprising:• A motor-reducer (10) that provides the power needed by the machine,• A pump casing (51 ) assembly, the part where the fluid enters the pump,• A lantern housing (20) that connects the motor-reducer (10) and the pump casing (51 ) assembly,• A drive shaft (12) that transmits the rotational motion it receives from the reducer,• A cardan shaft (13) that transmits the rotational motion received from the drive shaft (12),• A rotor (30) that rotates eccentrically with the drive from the cardan shaft (13) and creates flow and pressure,• Connecting pin (31 ) that connect both the drive shaft (12) to cardan shaft (13) and the cardan shaft (13) to rotor (30),• A stator (41 ) whose internal geometry allows the rotor (30) to rotate eccentrically,• The service body (52) located between the stator and the pump casing, which allows the rotor to be removed after the removal of the stator,• An outlet flange (60), the part where the fluid exits the pump, and characterized by comprising;• a service pin (100) that prevents sliding off of all other components of the progressive cavity pump (1 ) by being inserted into both the lantern body (20) and the drive shaft (12) when the motor-reducer (10) is disassembled, eliminates the need to disassemble all components for maintenance and service, and at the same time ensures that the rotor (30) is fixed without rotation when the stator group (40) is to be installed or removed.

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