Hydraulic pump for small excavator
Posted: Feb 12th, '25, 21:27
The application status and development requirements of hydraulic pumps for small excavators The development history of hydraulic pumps for small excavators has been nearly a century. However, there are mainly three types, namely gear pumps, vane pumps, and plunger pumps. The hydraulic pumps of cycloid small excavators belong to the gear pump type. From the perspective of the use of countries around the world and my country, these three types of pumps are in a tripartite situation, and there has been no significant change in recent years. However, from the perspective of technical development and the change trend of actual market share, it is conducive to the development of through-axis plunger pumps. Regardless of the circuit combination and energy saving, this aspect will further enhance the obvious benefits of the inclined axis pump, high pressure and long life, but the through-axis has structural difficulties, large volume, and inconvenient circuit combination, so the use has a trend of reduction. Gear pumps are relatively simple in structure and have a low cost, and their output value is absolutely dominant.
Overview of the development of hydraulic pumps for small excavators
The hydraulic pumps of small excavators have been relatively mature after nearly a century of development, so higher design and process levels and the latest modern technology are required to reach a more perfect stage. From the perspective of technology and application, the further development of hydraulic pumps for small excavators will develop in the following directions
Technical development trend of small excavators
1. Higher power-to-weight ratio of small excavators
For the series of through-shaft axial piston pumps produced by Shanghai Liquid and Gas Corporation, the power-to-weight ratio of the pumps with the same displacement produced in my country in the early stage is times that of the axial piston pumps with the same displacement produced in China in the early stage, and is twice that of the pumps with similar displacement currently sold in the market. A higher power-to-weight ratio means that the development of the pump in the future will have a higher pressure accepted by the additional operation and allow a larger additional operating speed.
Overview of the development of hydraulic pumps for small excavators
2. Small excavators have better working functions and higher power
In addition to pressure, displacement, flow, and speed, power is one of the primary functional indicators closely related to the user's operating cost-effectiveness. Flow pulsation, noise, and anti-pollution ability are all indicators that users are very concerned about when selecting or using them.
3. Small excavator has higher noise level
Low noise is one of the important selection factors in the use of pumps. From the user's point of view, the noise of the hydraulic pump of a small excavator is an acceptable noise level. However, as the use pressure and displacement increase, it is an acceptable noise level, which is considered to exceed the acceptable range. At present, large-displacement plunger pumps produced in my country need to be further improved to reduce noise. The main aspect of noise reduction is the improvement of the oil distribution plate, because this is a major noise source. However, there is a great improvement in the oil suction capacity, but it is not enough to just consider the hydraulic noise source. The rigidity of the pump body, the functional type and structure of the bearing are all aspects that need to be considered comprehensively.
4. High pressure of the hydraulic pump of a small excavator
With the development of science and technology, the development of hydraulic high pressure is mainly the high pressure of the pump. The advancement of the pressure level of the hydraulic pump of a small excavator means the reduction of the mechanical volume, and it will also significantly reduce the medium used in the entire hydraulic system. This benefit is particularly outstanding in the hydraulic transmission of walking machinery, so one of the most widely used phenomena of high-pressure pumps is in engineering machinery.
These benefits will reduce or make the main engine more compact, reduce the cost of production, and improve the dynamic characteristics. However, the increase in this pressure is bound by two conditions. The increase in the maximum operating pressure of the hydraulic pump of a small excavator is based on the improvement of materials and the improvement of heat treatment technology, the improvement of processing accuracy and equipment accuracy, and the advancement of processing methods, which will increase the manufacturing cost.
Overview of the development of the hydraulic pump of a small excavator
Others are currently bound by the functions of sealing and pipeline materials, and the increase in pressure will increase the cost of other components or accessories. Therefore
The maximum operating pressure of the hydraulic pump of a small excavator is consistent with the overall level of mechanical processing and the level of pressure resistance of hydraulic accessories. This will be a gradual process. The optimal operating pressure is in line with the development level of the machinery industry. In terms of the foreseeable direction in the past decade, it is the expected value of displacement
5. Information and intelligent control of hydraulic pump variables of small excavators
Mini excavator
Energy saving of hydraulic transmission is one of the most important issues for users in development and application. Energy saving not only reduces equipment costs, but also simplifies the cooling method of the system and reduces requirements, which is beneficial to the stability of the working medium, so that the oil quality will not be deteriorated by temperature and then cause the medium to oxidize, resulting in a reduced trial period, so as to maintain better system cleanliness and enable the system to operate stably and normally for a long time.
Mini crawler excavator，Mini crawler excavator attachments，Excavator attachments，Crawler excavator，Mini excavator purchase
Choose BONOVO for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.bonovogroup.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com
Overview of the development of hydraulic pumps for small excavators
The hydraulic pumps of small excavators have been relatively mature after nearly a century of development, so higher design and process levels and the latest modern technology are required to reach a more perfect stage. From the perspective of technology and application, the further development of hydraulic pumps for small excavators will develop in the following directions
Technical development trend of small excavators
1. Higher power-to-weight ratio of small excavators
For the series of through-shaft axial piston pumps produced by Shanghai Liquid and Gas Corporation, the power-to-weight ratio of the pumps with the same displacement produced in my country in the early stage is times that of the axial piston pumps with the same displacement produced in China in the early stage, and is twice that of the pumps with similar displacement currently sold in the market. A higher power-to-weight ratio means that the development of the pump in the future will have a higher pressure accepted by the additional operation and allow a larger additional operating speed.
Overview of the development of hydraulic pumps for small excavators
2. Small excavators have better working functions and higher power
In addition to pressure, displacement, flow, and speed, power is one of the primary functional indicators closely related to the user's operating cost-effectiveness. Flow pulsation, noise, and anti-pollution ability are all indicators that users are very concerned about when selecting or using them.
3. Small excavator has higher noise level
Low noise is one of the important selection factors in the use of pumps. From the user's point of view, the noise of the hydraulic pump of a small excavator is an acceptable noise level. However, as the use pressure and displacement increase, it is an acceptable noise level, which is considered to exceed the acceptable range. At present, large-displacement plunger pumps produced in my country need to be further improved to reduce noise. The main aspect of noise reduction is the improvement of the oil distribution plate, because this is a major noise source. However, there is a great improvement in the oil suction capacity, but it is not enough to just consider the hydraulic noise source. The rigidity of the pump body, the functional type and structure of the bearing are all aspects that need to be considered comprehensively.
4. High pressure of the hydraulic pump of a small excavator
With the development of science and technology, the development of hydraulic high pressure is mainly the high pressure of the pump. The advancement of the pressure level of the hydraulic pump of a small excavator means the reduction of the mechanical volume, and it will also significantly reduce the medium used in the entire hydraulic system. This benefit is particularly outstanding in the hydraulic transmission of walking machinery, so one of the most widely used phenomena of high-pressure pumps is in engineering machinery.
These benefits will reduce or make the main engine more compact, reduce the cost of production, and improve the dynamic characteristics. However, the increase in this pressure is bound by two conditions. The increase in the maximum operating pressure of the hydraulic pump of a small excavator is based on the improvement of materials and the improvement of heat treatment technology, the improvement of processing accuracy and equipment accuracy, and the advancement of processing methods, which will increase the manufacturing cost.
Overview of the development of the hydraulic pump of a small excavator
Others are currently bound by the functions of sealing and pipeline materials, and the increase in pressure will increase the cost of other components or accessories. Therefore
The maximum operating pressure of the hydraulic pump of a small excavator is consistent with the overall level of mechanical processing and the level of pressure resistance of hydraulic accessories. This will be a gradual process. The optimal operating pressure is in line with the development level of the machinery industry. In terms of the foreseeable direction in the past decade, it is the expected value of displacement
5. Information and intelligent control of hydraulic pump variables of small excavators
Mini excavator
Energy saving of hydraulic transmission is one of the most important issues for users in development and application. Energy saving not only reduces equipment costs, but also simplifies the cooling method of the system and reduces requirements, which is beneficial to the stability of the working medium, so that the oil quality will not be deteriorated by temperature and then cause the medium to oxidize, resulting in a reduced trial period, so as to maintain better system cleanliness and enable the system to operate stably and normally for a long time.
Mini crawler excavator，Mini crawler excavator attachments，Excavator attachments，Crawler excavator，Mini excavator purchase
Choose BONOVO for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.bonovogroup.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com