High-pressure gear pump for low-viscosity precise metering
By setting the first and second inlet holes in the high-pressure gear pump, the mixed impact of high and low-pressure liquid is transferred to the top and bottom of the pump housing, the gear pump vibration problem is solved and the operation stability of industrial equipment is improved .
Patent Information
- Application Number
- CN202421136393.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-22
AI Technical Summary
When existing gear pumps convey low-viscosity liquids, vibrations caused by intermittent contact between high-pressure and low-pressure liquids, which affects the smooth operation of industrial equipment, especially when outputting high-pressure liquids.
A high-pressure gear pump including an active gear, a passive gear and a pump housing is designed. By providing a first and second inlet holes, the gear grooves of the active gear and the grooves of the passive gear and the outlet of the pump housing are arranged. The channels are connected, and the mixed shock is transferred to the top and bottom of the pump housing to reduce vibration.
It effectively weakens the vibration strength of the gear pump and improves the smooth operation of industrial equipment.
Smart Images
Figure CN222315359U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid pumps, in particular to a high-pressure gear pump used for low-viscosity precision metering. Background Art
[0002] In the field of low viscosity and modified metering production, it is necessary to meter and pressurize the materials according to the ratio. Low viscosity materials here refer to materials with dynamic viscosity less than 1pa.s and aqueous solutions close to water. Due to their low viscosity, it is difficult to reach a pressure of 15-20MPA or above during material transportation. At present, the equipment for liquid transportation on the market includes vane pumps, plunger pumps, gear pumps, screw pumps, diaphragm pumps, etc., but only gear pumps can actually transport high temperature and high pressure and can perform precise metering.
[0003] When the gear pump is conveying liquid, due to the gear pump's own reasons, when the low-pressure liquid at the input end and the high-pressure liquid at the output end are in intermittent contact, there is a pressure difference, which will cause the gear pump to vibrate. This is especially obvious when the gear pump outputs high-pressure liquid, which will affect the overall stability of the industrial equipment. Utility Model Content
[0004] The utility model aims to provide a high-pressure gear pump for low-viscosity precision metering to solve the problems existing in the above-mentioned prior art, avoid vibration of the gear pump and improve the stability of the operation of industrial equipment.
[0005] To achieve the above purpose, the utility model provides the following solutions:
[0006] The utility model provides a high-pressure gear pump for low-viscosity precision metering, comprising a driving gear, a passive gear and a pump housing, wherein the driving gear and the passive gear are both in a meshing state in the pump housing and form a gear pump with the pump housing, the driving gear is located directly above the passive gear, a liquid inlet channel and a liquid outlet channel are arranged on the pump housing, the upper part and the lower part of the pump housing are respectively provided with a first liquid inlet hole capable of being communicated with a tooth groove of the driving gear and a second liquid inlet hole capable of being communicated with the tooth groove of the passive gear, the first liquid inlet hole and the second liquid inlet hole are both communicated with the liquid outlet channel, the plane where the axis of the driving gear and the axis of the passive gear are located together is a midplane, and the distances between the axis of the first liquid inlet hole and the axis of the second liquid inlet hole and the midplane are both less than three times the tooth top arc length of the driving gear.
[0007] Preferably, the axis of the first liquid inlet hole and the axis of the second liquid inlet hole coincide with the midplane.
[0008] Preferably, a plane equidistant from the two side surfaces of the driving gear is a center dividing plane, and the axis of the first liquid inlet hole and the axis of the second liquid inlet hole coincide with the center dividing plane.
[0009] Compared with the prior art, the utility model has achieved the following technical effects:
[0010] The utility model provides a high-pressure gear pump for low-viscosity precision metering, by arranging a first liquid inlet hole and a second liquid inlet hole, connecting the tooth grooves of the driving gear and the tooth grooves of the driven gear with the liquid outlet channel of the pump casing, so that the mixed impact of the high-pressure liquid and the low-pressure liquid in the gear pump is transferred to the top and the bottom of the pump casing to offset, thereby reducing the vibration intensity of the gear pump and improving the stability of the operation of industrial equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0012] Figure 1 This is a schematic diagram of the structure of a high-pressure gear pump for low-viscosity precision metering provided by the utility model;
[0013] In the figure: 1-driving gear, 2-driven gear, 3-pump housing, 4-liquid inlet channel, 5-liquid outlet channel, 6-first liquid inlet hole, 7-second liquid inlet hole. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] The utility model aims to provide a high-pressure gear pump for low-viscosity precision metering to solve the problems existing in the above-mentioned prior art, avoid vibration of the gear pump and improve the stability of the operation of industrial equipment.
[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0017] The utility model provides a high-pressure gear pump for low-viscosity precision metering, such as Figure 1 As shown, a high-pressure gear pump for low-viscosity precision metering includes a driving gear 1, a driven gear 2 and a pump housing 3. The driving gear 1 and the driven gear 2 are both in meshing state in the pump housing 3 and form a gear pump with the pump housing 3. The driving gear 1 is located directly above the driven gear 2. A liquid inlet channel 4 and a liquid outlet channel 5 are provided on the pump housing 3. The upper and lower parts of the pump housing 3 are respectively provided with a first liquid inlet hole 6 that can be communicated with the tooth groove of the driving gear 1 and a second liquid inlet hole 7 that can be communicated with the tooth groove of the driven gear 2. The first liquid inlet hole 6 and the second liquid inlet hole 7 are both communicated with the liquid outlet channel 5. The plane where the axis of the driving gear 1 and the axis of the driven gear 2 are located together is the midplane. The distances between the axis of the first liquid inlet hole 6 and the axis of the second liquid inlet hole 7 and the midplane are both less than three times the tooth top arc length of the driving gear 1.
[0018] Further preferably, the axis of the first liquid inlet hole 6 and the axis of the second liquid inlet hole 7 coincide with the midplane, the plane equidistant from the two side surfaces of the driving gear 1 is the midplane, and the axis of the first liquid inlet hole 6 and the axis of the second liquid inlet hole 7 coincide with the midplane.
[0019] During the specific implementation process, the first liquid inlet hole 6 and the second liquid inlet hole 7 are connected to the liquid outlet channel 5 of the pump housing 3 through a steel pipe, and the driving motor is turned on to drive the active gear 1 to actively transport the low-pressure liquid at high pressure. The high-pressure liquid output by the pump housing 3 enters the tooth groove of the active gear 1 that rotates to the first liquid inlet hole 6 through the first liquid inlet hole 6, and the low-pressure liquid therein is pressurized. At the same time, the high-pressure liquid enters the tooth groove of the driven gear 2 that rotates to the second liquid inlet hole 7 through the second liquid inlet hole 7, and the low-pressure liquid therein is pressurized, so that the mixed impact of the high and low liquids is transferred to the top and bottom of the pump housing 3 to offset each other, thereby reducing the vibration intensity of the gear pump and improving the stability of the operation of the industrial equipment.
[0020] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. A high-pressure gear pump for low-viscosity precision metering, characterized in that: include: A driving gear, a driven gear and a pump housing, wherein the driving gear and the driven gear are both in meshing state in the pump housing and form a gear pump with the pump housing, the driving gear is located directly above the driven gear, a liquid inlet channel and a liquid outlet channel are arranged on the pump housing, the upper part and the lower part of the pump housing are respectively provided with a first liquid inlet hole capable of communicating with the tooth groove of the driving gear and a second liquid inlet hole capable of communicating with the tooth groove of the driven gear, the first liquid inlet hole and the second liquid inlet hole are both connected to the liquid outlet channel, the plane where the axis of the driving gear and the axis of the driven gear are located together is the midplane, and the distances between the axis of the first liquid inlet hole and the axis of the second liquid inlet hole and the midplane are both less than three times the tooth top arc length of the driving gear.
2. The high-pressure gear pump for low-viscosity precision metering according to claim 1, characterized in that: The axis of the first liquid inlet hole and the axis of the second liquid inlet hole coincide with the midplane.
3. The high-pressure gear pump for low-viscosity precision metering according to claim 2, characterized in that: A plane that is equidistant from the two side surfaces of the driving gear is a center dividing plane, and the axis of the first liquid inlet hole and the axis of the second liquid inlet hole coincide with the center dividing plane.